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kernel_linux
提交 60539fa3 编写于 作者: J James Bottomley
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Merge remote-tracking branch 'mkp-scsi/4.5/scsi-queue' into misc

上级 abaee091 a290dd57
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drivers/scsi/3w-xxxx.c
浏览文件 @ 60539fa3
......@@ -1045,6 +1045,9 @@ static int tw_chrdev_open(struct inode *inode, struct file *file)
static const struct file_operations tw_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = tw_chrdev_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = tw_chrdev_ioctl,
#endif
.open = tw_chrdev_open,
.release = NULL,
.llseek = noop_llseek,
......
drivers/scsi/Kconfig
浏览文件 @ 60539fa3
......@@ -1620,23 +1620,6 @@ config ATARI_SCSI
ST-DMA, replacing ACSI). It does NOT support other schemes, like
in the Hades (without DMA).
config ATARI_SCSI_TOSHIBA_DELAY
bool "Long delays for Toshiba CD-ROMs"
depends on ATARI_SCSI
help
This option increases the delay after a SCSI arbitration to
accommodate some flaky Toshiba CD-ROM drives. Say Y if you intend to
use a Toshiba CD-ROM drive; otherwise, the option is not needed and
would impact performance a bit, so say N.
config ATARI_SCSI_RESET_BOOT
bool "Reset SCSI-devices at boottime"
depends on ATARI_SCSI
help
Reset the devices on your Atari whenever it boots. This makes the
boot process fractionally longer but may assist recovery from errors
that leave the devices with SCSI operations partway completed.
config MAC_SCSI
tristate "Macintosh NCR5380 SCSI"
depends on MAC && SCSI=y
......
drivers/scsi/NCR5380.c
浏览文件 @ 60539fa3
......@@ -25,45 +25,8 @@
*/
/*
* Revision 1.10 1998/9/2 Alan Cox
* (alan@lxorguk.ukuu.org.uk)
* Fixed up the timer lockups reported so far. Things still suck. Looking
* forward to 2.3 and per device request queues. Then it'll be possible to
* SMP thread this beast and improve life no end.
* Revision 1.9 1997/7/27 Ronald van Cuijlenborg
* (ronald.van.cuijlenborg@tip.nl or nutty@dds.nl)
* (hopefully) fixed and enhanced USLEEP
* added support for DTC3181E card (for Mustek scanner)
*
* Revision 1.8 Ingmar Baumgart
* (ingmar@gonzo.schwaben.de)
* added support for NCR53C400a card
*
* Revision 1.7 1996/3/2 Ray Van Tassle (rayvt@comm.mot.com)
* added proc_info
* added support needed for DTC 3180/3280
* fixed a couple of bugs
*
* Revision 1.5 1994/01/19 09:14:57 drew
* Fixed udelay() hack that was being used on DATAOUT phases
* instead of a proper wait for the final handshake.
*
* Revision 1.4 1994/01/19 06:44:25 drew
* *** empty log message ***
*
* Revision 1.3 1994/01/19 05:24:40 drew
* Added support for TCR LAST_BYTE_SENT bit.
*
* Revision 1.2 1994/01/15 06:14:11 drew
* REAL DMA support, bug fixes.
*
* Revision 1.1 1994/01/15 06:00:54 drew
* Initial revision
*
* With contributions from Ray Van Tassle, Ingmar Baumgart,
* Ronald van Cuijlenborg, Alan Cox and others.
*/
/*
......@@ -78,31 +41,12 @@
*
* 4. Test SCSI-II tagged queueing (I have no devices which support
* tagged queueing)
*
* 5. Test linked command handling code after Eric is ready with
* the high level code.
*/
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_transport_spi.h>
#if (NDEBUG & NDEBUG_LISTS)
#define LIST(x,y) {printk("LINE:%d Adding %p to %p\n", __LINE__, (void*)(x), (void*)(y)); if ((x)==(y)) udelay(5); }
#define REMOVE(w,x,y,z) {printk("LINE:%d Removing: %p->%p %p->%p \n", __LINE__, (void*)(w), (void*)(x), (void*)(y), (void*)(z)); if ((x)==(y)) udelay(5); }
#else
#define LIST(x,y)
#define REMOVE(w,x,y,z)
#endif
#ifndef notyet
#undef LINKED
#undef REAL_DMA
#endif
#ifdef REAL_DMA_POLL
#undef READ_OVERRUNS
#define READ_OVERRUNS
#endif
#ifdef BOARD_REQUIRES_NO_DELAY
#define io_recovery_delay(x)
#else
......@@ -117,12 +61,6 @@
* transfer - some PC's will use the I/O bus, 68K's must use
* memory mapped) and drops this file in their 'C' wrapper.
*
* (Note from hch: unfortunately it was not enough for the different
* m68k folks and instead of improving this driver they copied it
* and hacked it up for their needs. As a consequence they lost
* most updates to this driver. Maybe someone will fix all these
* drivers to use a common core one day..)
*
* As far as command queueing, two queues are maintained for
* each 5380 in the system - commands that haven't been issued yet,
* and commands that are currently executing. This means that an
......@@ -139,17 +77,7 @@
* piece of hardware that requires you to sit in a loop polling for
* the REQ signal as long as you are connected. Some devices are
* brain dead (ie, many TEXEL CD ROM drives) and won't disconnect
* while doing long seek operations.
*
* The workaround for this is to keep track of devices that have
* disconnected. If the device hasn't disconnected, for commands that
* should disconnect, we do something like
*
* while (!REQ is asserted) { sleep for N usecs; poll for M usecs }
*
* Some tweaking of N and M needs to be done. An algorithm based
* on "time to data" would give the best results as long as short time
* to datas (ie, on the same track) were considered, however these
* while doing long seek operations. [...] These
* broken devices are the exception rather than the rule and I'd rather
* spend my time optimizing for the normal case.
*
......@@ -201,13 +129,6 @@
* DONT_USE_INTR - if defined, never use interrupts, even if we probe or
* override-configure an IRQ.
*
* LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
* bytes at a time. Since interrupts are disabled by default during
* these transfers, we might need this to give reasonable interrupt
* service time if the transfer size gets too large.
*
* LINKED - if defined, linked commands are supported.
*
* PSEUDO_DMA - if defined, PSEUDO DMA is used during the data transfer phases.
*
* REAL_DMA - if defined, REAL DMA is used during the data transfer phases.
......@@ -216,25 +137,7 @@
* rely on phase mismatch and EOP interrupts to determine end
* of phase.
*
* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You
* only really want to use this if you're having a problem with
* dropped characters during high speed communications, and even
* then, you're going to be better off twiddling with transfersize
* in the high level code.
*
* Defaults for these will be provided although the user may want to adjust
* these to allocate CPU resources to the SCSI driver or "real" code.
*
* USLEEP_SLEEP - amount of time, in jiffies, to sleep
*
* USLEEP_POLL - amount of time, in jiffies, to poll
*
* These macros MUST be defined :
* NCR5380_local_declare() - declare any local variables needed for your
* transfer routines.
*
* NCR5380_setup(instance) - initialize any local variables needed from a given
* instance of the host adapter for NCR5380_{read,write,pread,pwrite}
*
* NCR5380_read(register) - read from the specified register
*
......@@ -267,10 +170,10 @@
* possible) function may be used.
*/
static int do_abort(struct Scsi_Host *host);
static void do_reset(struct Scsi_Host *host);
static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
/*
/**
* initialize_SCp - init the scsi pointer field
* @cmd: command block to set up
*
......@@ -295,65 +198,71 @@ static inline void initialize_SCp(struct scsi_cmnd *cmd)
cmd->SCp.ptr = NULL;
cmd->SCp.this_residual = 0;
}
cmd->SCp.Status = 0;
cmd->SCp.Message = 0;
}
/**
* NCR5380_poll_politely - wait for NCR5380 status bits
* NCR5380_poll_politely2 - wait for two chip register values
* @instance: controller to poll
* @reg: 5380 register to poll
* @bit: Bitmask to check
* @val: Value required to exit
* @reg1: 5380 register to poll
* @bit1: Bitmask to check
* @val1: Expected value
* @reg2: Second 5380 register to poll
* @bit2: Second bitmask to check
* @val2: Second expected value
* @wait: Time-out in jiffies
*
* Polls the NCR5380 in a reasonably efficient manner waiting for
* an event to occur, after a short quick poll we begin giving the
* CPU back in non IRQ contexts
* Polls the chip in a reasonably efficient manner waiting for an
* event to occur. After a short quick poll we begin to yield the CPU
* (if possible). In irq contexts the time-out is arbitrarily limited.
* Callers may hold locks as long as they are held in irq mode.
*
* Returns the value of the register or a negative error code.
* Returns 0 if either or both event(s) occurred otherwise -ETIMEDOUT.
*/
static int NCR5380_poll_politely(struct Scsi_Host *instance, int reg, int bit, int val, int t)
static int NCR5380_poll_politely2(struct Scsi_Host *instance,
int reg1, int bit1, int val1,
int reg2, int bit2, int val2, int wait)
{
NCR5380_local_declare();
int n = 500; /* At about 8uS a cycle for the cpu access */
unsigned long end = jiffies + t;
int r;
NCR5380_setup(instance);
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned long deadline = jiffies + wait;
unsigned long n;
while( n-- > 0)
{
r = NCR5380_read(reg);
if((r & bit) == val)
/* Busy-wait for up to 10 ms */
n = min(10000U, jiffies_to_usecs(wait));
n *= hostdata->accesses_per_ms;
n /= 2000;
do {
if ((NCR5380_read(reg1) & bit1) == val1)
return 0;
if ((NCR5380_read(reg2) & bit2) == val2)
return 0;
cpu_relax();
}
} while (n--);
/* t time yet ? */
while(time_before(jiffies, end))
{
r = NCR5380_read(reg);
if((r & bit) == val)
if (irqs_disabled() || in_interrupt())
return -ETIMEDOUT;
/* Repeatedly sleep for 1 ms until deadline */
while (time_is_after_jiffies(deadline)) {
schedule_timeout_uninterruptible(1);
if ((NCR5380_read(reg1) & bit1) == val1)
return 0;
if ((NCR5380_read(reg2) & bit2) == val2)
return 0;
if(!in_interrupt())
cond_resched();
else
cpu_relax();
}
return -ETIMEDOUT;
}
static struct {
unsigned char value;
const char *name;
} phases[] __maybe_unused = {
{PHASE_DATAOUT, "DATAOUT"},
{PHASE_DATAIN, "DATAIN"},
{PHASE_CMDOUT, "CMDOUT"},
{PHASE_STATIN, "STATIN"},
{PHASE_MSGOUT, "MSGOUT"},
{PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
static inline int NCR5380_poll_politely(struct Scsi_Host *instance,
int reg, int bit, int val, int wait)
{
return NCR5380_poll_politely2(instance, reg, bit, val,
reg, bit, val, wait);
}
#if NDEBUG
static struct {
......@@ -389,6 +298,7 @@ mrs[] = {
{MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
{MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
{MR_ENABLE_EOP_INTR, "MODE EOP INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
{MR_DMA_MODE, "MODE DMA"},
{MR_ARBITRATE, "MODE ARBITRATION"},
......@@ -400,15 +310,11 @@ mrs[] = {
* @instance: adapter state to dump
*
* Print the SCSI bus signals for debugging purposes
*
* Locks: caller holds hostdata lock (not essential)
*/
static void NCR5380_print(struct Scsi_Host *instance)
{
NCR5380_local_declare();
unsigned char status, data, basr, mr, icr, i;
NCR5380_setup(instance);
data = NCR5380_read(CURRENT_SCSI_DATA_REG);
status = NCR5380_read(STATUS_REG);
......@@ -435,106 +341,45 @@ static void NCR5380_print(struct Scsi_Host *instance)
printk("\n");
}
static struct {
unsigned char value;
const char *name;
} phases[] = {
{PHASE_DATAOUT, "DATAOUT"},
{PHASE_DATAIN, "DATAIN"},
{PHASE_CMDOUT, "CMDOUT"},
{PHASE_STATIN, "STATIN"},
{PHASE_MSGOUT, "MSGOUT"},
{PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
/*
/**
* NCR5380_print_phase - show SCSI phase
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
*
* Locks: none
*/
static void NCR5380_print_phase(struct Scsi_Host *instance)
{
NCR5380_local_declare();
unsigned char status;
int i;
NCR5380_setup(instance);
status = NCR5380_read(STATUS_REG);
if (!(status & SR_REQ))
printk("scsi%d : REQ not asserted, phase unknown.\n", instance->host_no);
shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n");
else {
for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
printk("scsi%d : phase %s\n", instance->host_no, phases[i].name);
for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
(phases[i].value != (status & PHASE_MASK)); ++i)
;
shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name);
}
}
#endif
/*
* These need tweaking, and would probably work best as per-device
* flags initialized differently for disk, tape, cd, etc devices.
* People with broken devices are free to experiment as to what gives
* the best results for them.
*
* USLEEP_SLEEP should be a minimum seek time.
*
* USLEEP_POLL should be a maximum rotational latency.
*/
#ifndef USLEEP_SLEEP
/* 20 ms (reasonable hard disk speed) */
#define USLEEP_SLEEP msecs_to_jiffies(20)
#endif
/* 300 RPM (floppy speed) */
#ifndef USLEEP_POLL
#define USLEEP_POLL msecs_to_jiffies(200)
#endif
#ifndef USLEEP_WAITLONG
/* RvC: (reasonable time to wait on select error) */
#define USLEEP_WAITLONG USLEEP_SLEEP
#endif
/*
* Function : int should_disconnect (unsigned char cmd)
*
* Purpose : decide whether a command would normally disconnect or
* not, since if it won't disconnect we should go to sleep.
*
* Input : cmd - opcode of SCSI command
*
* Returns : DISCONNECT_LONG if we should disconnect for a really long
* time (ie always, sleep, look for REQ active, sleep),
* DISCONNECT_TIME_TO_DATA if we would only disconnect for a normal
* time-to-data delay, DISCONNECT_NONE if this command would return
* immediately.
*
* Future sleep algorithms based on time to data can exploit
* something like this so they can differentiate between "normal"
* (ie, read, write, seek) and unusual commands (ie, * format).
*
* Note : We don't deal with commands that handle an immediate disconnect,
*
*/
static int should_disconnect(unsigned char cmd)
{
switch (cmd) {
case READ_6:
case WRITE_6:
case SEEK_6:
case READ_10:
case WRITE_10:
case SEEK_10:
return DISCONNECT_TIME_TO_DATA;
case FORMAT_UNIT:
case SEARCH_HIGH:
case SEARCH_LOW:
case SEARCH_EQUAL:
return DISCONNECT_LONG;
default:
return DISCONNECT_NONE;
}
}
static void NCR5380_set_timer(struct NCR5380_hostdata *hostdata, unsigned long timeout)
{
hostdata->time_expires = jiffies + timeout;
schedule_delayed_work(&hostdata->coroutine, timeout);
}
static int probe_irq __initdata = 0;
static int probe_irq __initdata;
/**
* probe_intr - helper for IRQ autoprobe
......@@ -559,18 +404,14 @@ static irqreturn_t __init probe_intr(int irq, void *dev_id)
*
* Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ
* and then looking to see what interrupt actually turned up.
*
* Locks: none, irqs must be enabled on entry
*/
static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
int possible)
{
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned long timeout;
int trying_irqs, i, mask;
NCR5380_setup(instance);
for (trying_irqs = 0, i = 1, mask = 2; i < 16; ++i, mask <<= 1)
if ((mask & possible) && (request_irq(i, &probe_intr, 0, "NCR-probe", NULL) == 0))
......@@ -612,8 +453,6 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
* @instance: relevant scsi host instance
*
* For use as the host template info() handler.
*
* Locks: none
*/
static const char *NCR5380_info(struct Scsi_Host *instance)
......@@ -633,20 +472,14 @@ static void prepare_info(struct Scsi_Host *instance)
"can_queue %d, cmd_per_lun %d, "
"sg_tablesize %d, this_id %d, "
"flags { %s%s%s}, "
#if defined(USLEEP_POLL) && defined(USLEEP_WAITLONG)
"USLEEP_POLL %lu, USLEEP_WAITLONG %lu, "
#endif
"options { %s} ",
instance->hostt->name, instance->io_port, instance->n_io_port,
instance->base, instance->irq,
instance->can_queue, instance->cmd_per_lun,
instance->sg_tablesize, instance->this_id,
hostdata->flags & FLAG_NCR53C400 ? "NCR53C400 " : "",
hostdata->flags & FLAG_DTC3181E ? "DTC3181E " : "",
hostdata->flags & FLAG_NO_DMA_FIXUP ? "NO_DMA_FIXUP " : "",
hostdata->flags & FLAG_NO_PSEUDO_DMA ? "NO_PSEUDO_DMA " : "",
#if defined(USLEEP_POLL) && defined(USLEEP_WAITLONG)
USLEEP_POLL, USLEEP_WAITLONG,
#endif
hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "",
#ifdef AUTOPROBE_IRQ
"AUTOPROBE_IRQ "
#endif
......@@ -664,47 +497,11 @@ static void prepare_info(struct Scsi_Host *instance)
#endif
#ifdef PSEUDO_DMA
"PSEUDO_DMA "
#endif
#ifdef UNSAFE
"UNSAFE "
#endif
#ifdef NCR53C400
"NCR53C400 "
#endif
"");
}
/**
* NCR5380_print_status - dump controller info
* @instance: controller to dump
*
* Print commands in the various queues, called from NCR5380_abort
* and NCR5380_debug to aid debugging.
*
* Locks: called functions disable irqs
*/
static void NCR5380_print_status(struct Scsi_Host *instance)
{
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
}
#ifdef PSEUDO_DMA
/******************************************/
/*
* /proc/scsi/[dtc pas16 t128 generic]/[0-ASC_NUM_BOARD_SUPPORTED]
*
* *buffer: I/O buffer
* **start: if inout == FALSE pointer into buffer where user read should start
* offset: current offset
* length: length of buffer
* hostno: Scsi_Host host_no
* inout: TRUE - user is writing; FALSE - user is reading
*
* Return the number of bytes read from or written
*/
static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance,
char *buffer, int length)
{
......@@ -714,64 +511,17 @@ static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance,
hostdata->spin_max_w = 0;
return 0;
}
#endif
static
void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m);
static
void lprint_command(unsigned char *cmd, struct seq_file *m);
static
void lprint_opcode(int opcode, struct seq_file *m);
static int __maybe_unused NCR5380_show_info(struct seq_file *m,
struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata;
struct scsi_cmnd *ptr;
hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
#ifdef PSEUDO_DMA
seq_printf(m, "Highwater I/O busy spin counts: write %d, read %d\n",
hostdata->spin_max_w, hostdata->spin_max_r);
#endif
spin_lock_irq(instance->host_lock);
if (!hostdata->connected)
seq_printf(m, "scsi%d: no currently connected command\n", instance->host_no);
else
lprint_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected, m);
seq_printf(m, "scsi%d: issue_queue\n", instance->host_no);
for (ptr = (struct scsi_cmnd *) hostdata->issue_queue; ptr; ptr = (struct scsi_cmnd *) ptr->host_scribble)
lprint_Scsi_Cmnd(ptr, m);
seq_printf(m, "scsi%d: disconnected_queue\n", instance->host_no);
for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; ptr = (struct scsi_cmnd *) ptr->host_scribble)
lprint_Scsi_Cmnd(ptr, m);
spin_unlock_irq(instance->host_lock);
return 0;
}
static void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m)
{
seq_printf(m, "scsi%d : destination target %d, lun %llu\n", cmd->device->host->host_no, cmd->device->id, cmd->device->lun);
seq_puts(m, " command = ");
lprint_command(cmd->cmnd, m);
}
static void lprint_command(unsigned char *command, struct seq_file *m)
{
int i, s;
lprint_opcode(command[0], m);
for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
seq_printf(m, "%02x ", command[i]);
seq_putc(m, '\n');
}
static void lprint_opcode(int opcode, struct seq_file *m)
{
seq_printf(m, "%2d (0x%02x)", opcode, opcode);
}
#endif
/**
* NCR5380_init - initialise an NCR5380
......@@ -785,33 +535,17 @@ static void lprint_opcode(int opcode, struct seq_file *m)
* set correctly. I don't care about the irq and other fields.
*
* Returns 0 for success
*
* Locks: interrupts must be enabled when we are called
*/
static int NCR5380_init(struct Scsi_Host *instance, int flags)
{
NCR5380_local_declare();
int i, pass;
unsigned long timeout;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
if(in_interrupt())
printk(KERN_ERR "NCR5380_init called with interrupts off!\n");
/*
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
#ifdef NCR53C400
if (flags & FLAG_NCR53C400)
instance->NCR5380_instance_name += NCR53C400_address_adjust;
#endif
NCR5380_setup(instance);
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int i;
unsigned long deadline;
hostdata->aborted = 0;
hostdata->host = instance;
hostdata->id_mask = 1 << instance->this_id;
hostdata->id_higher_mask = 0;
for (i = hostdata->id_mask; i <= 0x80; i <<= 1)
if (i > hostdata->id_mask)
hostdata->id_higher_mask |= i;
......@@ -820,21 +554,21 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
#ifdef REAL_DMA
hostdata->dmalen = 0;
#endif
hostdata->targets_present = 0;
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
INIT_DELAYED_WORK(&hostdata->coroutine, NCR5380_main);
hostdata->sensing = NULL;
INIT_LIST_HEAD(&hostdata->autosense);
INIT_LIST_HEAD(&hostdata->unissued);
INIT_LIST_HEAD(&hostdata->disconnected);
/* The CHECK code seems to break the 53C400. Will check it later maybe */
if (flags & FLAG_NCR53C400)
hostdata->flags = FLAG_HAS_LAST_BYTE_SENT | flags;
else
hostdata->flags = FLAG_CHECK_LAST_BYTE_SENT | flags;
hostdata->flags = flags;
hostdata->host = instance;
hostdata->time_expires = 0;
INIT_WORK(&hostdata->main_task, NCR5380_main);
hostdata->work_q = alloc_workqueue("ncr5380_%d",
WQ_UNBOUND | WQ_MEM_RECLAIM,
1, instance->host_no);
if (!hostdata->work_q)
return -ENOMEM;
prepare_info(instance);
......@@ -843,43 +577,69 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
NCR5380_write(TARGET_COMMAND_REG, 0);
NCR5380_write(SELECT_ENABLE_REG, 0);
#ifdef NCR53C400
if (hostdata->flags & FLAG_NCR53C400) {
NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
}
#endif
/* Calibrate register polling loop */
i = 0;
deadline = jiffies + 1;
do {
cpu_relax();
} while (time_is_after_jiffies(deadline));
deadline += msecs_to_jiffies(256);
do {
NCR5380_read(STATUS_REG);
++i;
cpu_relax();
} while (time_is_after_jiffies(deadline));
hostdata->accesses_per_ms = i / 256;
/*
* Detect and correct bus wedge problems.
return 0;
}
/**
* NCR5380_maybe_reset_bus - Detect and correct bus wedge problems.
* @instance: adapter to check
*
* If the system crashed, it may have crashed in a state
* where a SCSI command was still executing, and the
* SCSI bus is not in a BUS FREE STATE.
* If the system crashed, it may have crashed with a connected target and
* the SCSI bus busy. Check for BUS FREE phase. If not, try to abort the
* currently established nexus, which we know nothing about. Failing that
* do a bus reset.
*
* If this is the case, we'll try to abort the currently
* established nexus which we know nothing about, and that
* failing, do a hard reset of the SCSI bus
* Note that a bus reset will cause the chip to assert IRQ.
*
* Returns 0 if successful, otherwise -ENXIO.
*/
static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int pass;
for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) {
switch (pass) {
case 1:
case 3:
case 5:
printk(KERN_INFO "scsi%d: SCSI bus busy, waiting up to five seconds\n", instance->host_no);
timeout = jiffies + 5 * HZ;
NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, 0, 5*HZ);
shost_printk(KERN_ERR, instance, "SCSI bus busy, waiting up to five seconds\n");
NCR5380_poll_politely(instance,
STATUS_REG, SR_BSY, 0, 5 * HZ);
break;
case 2:
printk(KERN_WARNING "scsi%d: bus busy, attempting abort\n", instance->host_no);
shost_printk(KERN_ERR, instance, "bus busy, attempting abort\n");
do_abort(instance);
break;
case 4:
printk(KERN_WARNING "scsi%d: bus busy, attempting reset\n", instance->host_no);
shost_printk(KERN_ERR, instance, "bus busy, attempting reset\n");
do_reset(instance);
/* Wait after a reset; the SCSI standard calls for
* 250ms, we wait 500ms to be on the safe side.
* But some Toshiba CD-ROMs need ten times that.
*/
if (hostdata->flags & FLAG_TOSHIBA_DELAY)
msleep(2500);
else
msleep(500);
break;
case 6:
printk(KERN_ERR "scsi%d: bus locked solid or invalid override\n", instance->host_no);
shost_printk(KERN_ERR, instance, "bus locked solid\n");
return -ENXIO;
}
}
......@@ -889,53 +649,78 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
/**
* NCR5380_exit - remove an NCR5380
* @instance: adapter to remove
*
* Assumes that no more work can be queued (e.g. by NCR5380_intr).
*/
static void NCR5380_exit(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
cancel_work_sync(&hostdata->main_task);
destroy_workqueue(hostdata->work_q);
}
/**
* complete_cmd - finish processing a command and return it to the SCSI ML
* @instance: the host instance
* @cmd: command to complete
*/
static void complete_cmd(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd);
if (hostdata->sensing == cmd) {
/* Autosense processing ends here */
if ((cmd->result & 0xff) != SAM_STAT_GOOD) {
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
set_host_byte(cmd, DID_ERROR);
} else
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
hostdata->sensing = NULL;
}
hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
cancel_delayed_work_sync(&hostdata->coroutine);
cmd->scsi_done(cmd);
}
/**
* NCR5380_queue_command - queue a command
* @instance: the relevant SCSI adapter
* @cmd: SCSI command
* @done: completion handler
*
* cmd is added to the per instance issue_queue, with minor
* cmd is added to the per-instance issue queue, with minor
* twiddling done to the host specific fields of cmd. If the
* main coroutine is not running, it is restarted.
*
* Locks: host lock taken by caller
*/
static int NCR5380_queue_command_lck(struct scsi_cmnd *cmd, void (*done) (struct scsi_cmnd *))
static int NCR5380_queue_command(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct scsi_cmnd *tmp;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
unsigned long flags;
#if (NDEBUG & NDEBUG_NO_WRITE)
switch (cmd->cmnd[0]) {
case WRITE_6:
case WRITE_10:
printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", instance->host_no);
shost_printk(KERN_DEBUG, instance, "WRITE attempted with NDEBUG_NO_WRITE set\n");
cmd->result = (DID_ERROR << 16);
done(cmd);
cmd->scsi_done(cmd);
return 0;
}
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
/*
* We use the host_scribble field as a pointer to the next command
* in a queue
*/
cmd->host_scribble = NULL;
cmd->scsi_done = done;
cmd->result = 0;
spin_lock_irqsave(&hostdata->lock, flags);
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
* commands are added to the head of the queue since any command will
......@@ -943,24 +728,78 @@ static int NCR5380_queue_command_lck(struct scsi_cmnd *cmd, void (*done) (struct
* sense data is only guaranteed to be valid while the condition exists.
*/
if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
LIST(cmd, hostdata->issue_queue);
cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
hostdata->issue_queue = cmd;
} else {
for (tmp = (struct scsi_cmnd *) hostdata->issue_queue; tmp->host_scribble; tmp = (struct scsi_cmnd *) tmp->host_scribble);
LIST(cmd, tmp);
tmp->host_scribble = (unsigned char *) cmd;
}
dprintk(NDEBUG_QUEUES, "scsi%d : command added to %s of queue\n", instance->host_no, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
if (cmd->cmnd[0] == REQUEST_SENSE)
list_add(&ncmd->list, &hostdata->unissued);
else
list_add_tail(&ncmd->list, &hostdata->unissued);
spin_unlock_irqrestore(&hostdata->lock, flags);
dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
cmd, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
/* Run the coroutine if it isn't already running. */
/* Kick off command processing */
schedule_delayed_work(&hostdata->coroutine, 0);
queue_work(hostdata->work_q, &hostdata->main_task);
return 0;
}
static DEF_SCSI_QCMD(NCR5380_queue_command)
/**
* dequeue_next_cmd - dequeue a command for processing
* @instance: the scsi host instance
*
* Priority is given to commands on the autosense queue. These commands
* need autosense because of a CHECK CONDITION result.
*
* Returns a command pointer if a command is found for a target that is
* not already busy. Otherwise returns NULL.
*/
static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
struct NCR5380_cmd *ncmd;
struct scsi_cmnd *cmd;
if (list_empty(&hostdata->autosense)) {
list_for_each_entry(ncmd, &hostdata->unissued, list) {
cmd = NCR5380_to_scmd(ncmd);
dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n",
cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun);
if (!(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))) {
list_del(&ncmd->list);
dsprintk(NDEBUG_QUEUES, instance,
"dequeue: removed %p from issue queue\n", cmd);
return cmd;
}
}
} else {
/* Autosense processing begins here */
ncmd = list_first_entry(&hostdata->autosense,
struct NCR5380_cmd, list);
list_del(&ncmd->list);
cmd = NCR5380_to_scmd(ncmd);
dsprintk(NDEBUG_QUEUES, instance,
"dequeue: removed %p from autosense queue\n", cmd);
scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
hostdata->sensing = cmd;
return cmd;
}
return NULL;
}
static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
if (hostdata->sensing) {
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
list_add(&ncmd->list, &hostdata->autosense);
hostdata->sensing = NULL;
} else
list_add(&ncmd->list, &hostdata->unissued);
}
/**
* NCR5380_main - NCR state machines
......@@ -969,44 +808,24 @@ static DEF_SCSI_QCMD(NCR5380_queue_command)
* be done on the NCR5380 host adapters in a system. Both
* NCR5380_queue_command() and NCR5380_intr() will try to start it
* in case it is not running.
*
* Locks: called as its own thread with no locks held. Takes the
* host lock and called routines may take the isa dma lock.
*/
static void NCR5380_main(struct work_struct *work)
{
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, coroutine.work);
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
struct scsi_cmnd *tmp, *prev;
struct scsi_cmnd *cmd;
int done;
spin_lock_irq(instance->host_lock);
do {
/* Lock held here */
done = 1;
if (!hostdata->connected && !hostdata->selecting) {
dprintk(NDEBUG_MAIN, "scsi%d : not connected\n", instance->host_no);
/*
* Search through the issue_queue for a command destined
* for a target that's not busy.
*/
for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = (struct scsi_cmnd *) tmp->host_scribble)
{
if (prev != tmp)
dprintk(NDEBUG_LISTS, "MAIN tmp=%p target=%d busy=%d lun=%llu\n", tmp, tmp->device->id, hostdata->busy[tmp->device->id], tmp->device->lun);
/* When we find one, remove it from the issue queue. */
if (!(hostdata->busy[tmp->device->id] &
(1 << (u8)(tmp->device->lun & 0xff)))) {
if (prev) {
REMOVE(prev, prev->host_scribble, tmp, tmp->host_scribble);
prev->host_scribble = tmp->host_scribble;
} else {
REMOVE(-1, hostdata->issue_queue, tmp, tmp->host_scribble);
hostdata->issue_queue = (struct scsi_cmnd *) tmp->host_scribble;
}
tmp->host_scribble = NULL;
spin_lock_irq(&hostdata->lock);
while (!hostdata->connected &&
(cmd = dequeue_next_cmd(instance))) {
dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd);
/*
* Attempt to establish an I_T_L nexus here.
......@@ -1014,21 +833,6 @@ static void NCR5380_main(struct work_struct *work)
* On failure, we must add the command back to the
* issue queue so we can keep trying.
*/
dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, "scsi%d : main() : command for target %d lun %llu removed from issue_queue\n", instance->host_no, tmp->device->id, tmp->device->lun);
/*
* A successful selection is defined as one that
* leaves us with the command connected and
* in hostdata->connected, OR has terminated the
* command.
*
* With successful commands, we fall through
* and see if we can do an information transfer,
* with failures we will restart.
*/
hostdata->selecting = NULL;
/* RvC: have to preset this to indicate a new command is being performed */
/*
* REQUEST SENSE commands are issued without tagged
* queueing, even on SCSI-II devices because the
......@@ -1036,52 +840,28 @@ static void NCR5380_main(struct work_struct *work)
* entire unit.
*/
if (!NCR5380_select(instance, tmp)) {
break;
cmd = NCR5380_select(instance, cmd);
if (!cmd) {
dsprintk(NDEBUG_MAIN, instance, "main: select complete\n");
} else {
LIST(tmp, hostdata->issue_queue);
tmp->host_scribble = (unsigned char *) hostdata->issue_queue;
hostdata->issue_queue = tmp;
done = 0;
dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, "scsi%d : main(): select() failed, returned to issue_queue\n", instance->host_no);
dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance,
"main: select failed, returning %p to queue\n", cmd);
requeue_cmd(instance, cmd);
}
}
/* lock held here still */
} /* if target/lun is not busy */
} /* for */
/* exited locked */
} /* if (!hostdata->connected) */
if (hostdata->selecting) {
tmp = (struct scsi_cmnd *) hostdata->selecting;
/* Selection will drop and retake the lock */
if (!NCR5380_select(instance, tmp)) {
/* Ok ?? */
} else {
/* RvC: device failed, so we wait a long time
this is needed for Mustek scanners, that
do not respond to commands immediately
after a scan */
printk(KERN_DEBUG "scsi%d: device %d did not respond in time\n", instance->host_no, tmp->device->id);
LIST(tmp, hostdata->issue_queue);
tmp->host_scribble = (unsigned char *) hostdata->issue_queue;
hostdata->issue_queue = tmp;
NCR5380_set_timer(hostdata, USLEEP_WAITLONG);
}
} /* if hostdata->selecting */
if (hostdata->connected
#ifdef REAL_DMA
&& !hostdata->dmalen
#endif
&& (!hostdata->time_expires || time_before_eq(hostdata->time_expires, jiffies))
) {
dprintk(NDEBUG_MAIN, "scsi%d : main() : performing information transfer\n", instance->host_no);
dsprintk(NDEBUG_MAIN, instance, "main: performing information transfer\n");
NCR5380_information_transfer(instance);
dprintk(NDEBUG_MAIN, "scsi%d : main() : done set false\n", instance->host_no);
done = 0;
} else
break;
}
spin_unlock_irq(&hostdata->lock);
if (!done)
cond_resched();
} while (!done);
spin_unlock_irq(instance->host_lock);
}
#ifndef DONT_USE_INTR
......@@ -1095,79 +875,105 @@ static void NCR5380_main(struct work_struct *work)
* from the disconnected queue, and restarting NCR5380_main()
* as required.
*
* Locks: takes the needed instance locks
*/
static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
* The chip can assert IRQ in any of six different conditions. The IRQ flag
* is then cleared by reading the Reset Parity/Interrupt Register (RPIR).
* Three of these six conditions are latched in the Bus and Status Register:
* - End of DMA (cleared by ending DMA Mode)
* - Parity error (cleared by reading RPIR)
* - Loss of BSY (cleared by reading RPIR)
* Two conditions have flag bits that are not latched:
* - Bus phase mismatch (non-maskable in DMA Mode, cleared by ending DMA Mode)
* - Bus reset (non-maskable)
* The remaining condition has no flag bit at all:
* - Selection/reselection
*
* Hence, establishing the cause(s) of any interrupt is partly guesswork.
* In "The DP8490 and DP5380 Comparison Guide", National Semiconductor
* claimed that "the design of the [DP8490] interrupt logic ensures
* interrupts will not be lost (they can be on the DP5380)."
* The L5380/53C80 datasheet from LOGIC Devices has more details.
*
* Checking for bus reset by reading RST is futile because of interrupt
* latency, but a bus reset will reset chip logic. Checking for parity error
* is unnecessary because that interrupt is never enabled. A Loss of BSY
* condition will clear DMA Mode. We can tell when this occurs because the
* the Busy Monitor interrupt is enabled together with DMA Mode.
*/
static irqreturn_t NCR5380_intr(int irq, void *dev_id)
{
NCR5380_local_declare();
struct Scsi_Host *instance = dev_id;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
int done;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int handled = 0;
unsigned char basr;
unsigned long flags;
dprintk(NDEBUG_INTR, "scsi : NCR5380 irq %d triggered\n",
instance->irq);
spin_lock_irqsave(&hostdata->lock, flags);
do {
done = 1;
spin_lock_irqsave(instance->host_lock, flags);
/* Look for pending interrupts */
NCR5380_setup(instance);
basr = NCR5380_read(BUS_AND_STATUS_REG);
/* XXX dispatch to appropriate routine if found and done=0 */
if (basr & BASR_IRQ) {
NCR5380_dprint(NDEBUG_INTR, instance);
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
done = 0;
dprintk(NDEBUG_INTR, "scsi%d : SEL interrupt\n", instance->host_no);
NCR5380_reselect(instance);
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else if (basr & BASR_PARITY_ERROR) {
dprintk(NDEBUG_INTR, "scsi%d : PARITY interrupt\n", instance->host_no);
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) {
dprintk(NDEBUG_INTR, "scsi%d : RESET interrupt\n", instance->host_no);
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else {
unsigned char mr = NCR5380_read(MODE_REG);
unsigned char sr = NCR5380_read(STATUS_REG);
dsprintk(NDEBUG_INTR, instance, "IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n",
irq, basr, sr, mr);
#if defined(REAL_DMA)
/*
* We should only get PHASE MISMATCH and EOP interrupts
* if we have DMA enabled, so do a sanity check based on
* the current setting of the MODE register.
if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) {
/* Probably End of DMA, Phase Mismatch or Loss of BSY.
* We ack IRQ after clearing Mode Register. Workarounds
* for End of DMA errata need to happen in DMA Mode.
*/
if ((NCR5380_read(MODE_REG) & MR_DMA) && ((basr & BASR_END_DMA_TRANSFER) || !(basr & BASR_PHASE_MATCH))) {
dsprintk(NDEBUG_INTR, instance, "interrupt in DMA mode\n");
int transferred;
if (!hostdata->connected)
panic("scsi%d : received end of DMA interrupt with no connected cmd\n", instance->hostno);
panic("scsi%d : DMA interrupt with no connected cmd\n",
instance->hostno);
transferred = (hostdata->dmalen - NCR5380_dma_residual(instance));
transferred = hostdata->dmalen - NCR5380_dma_residual(instance);
hostdata->connected->SCp.this_residual -= transferred;
hostdata->connected->SCp.ptr += transferred;
hostdata->dmalen = 0;
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
/* FIXME: we need to poll briefly then defer a workqueue task ! */
NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2*HZ);
NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2 * HZ);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else
#endif /* REAL_DMA */
if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) &&
(sr & (SR_SEL | SR_IO | SR_BSY | SR_RST)) == (SR_SEL | SR_IO)) {
/* Probably reselected */
NCR5380_write(SELECT_ENABLE_REG, 0);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
dsprintk(NDEBUG_INTR, instance, "interrupt with SEL and IO\n");
if (!hostdata->connected) {
NCR5380_reselect(instance);
queue_work(hostdata->work_q, &hostdata->main_task);
}
#else
dprintk(NDEBUG_INTR, "scsi : unknown interrupt, BASR 0x%X, MR 0x%X, SR 0x%x\n", basr, NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG));
(void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
#endif
if (!hostdata->connected)
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
} else {
/* Probably Bus Reset */
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
dsprintk(NDEBUG_INTR, instance, "unknown interrupt\n");
}
} /* if BASR_IRQ */
spin_unlock_irqrestore(instance->host_lock, flags);
if(!done)
schedule_delayed_work(&hostdata->coroutine, 0);
} while (!done);
return IRQ_HANDLED;
handled = 1;
} else {
shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n");
}
spin_unlock_irqrestore(&hostdata->lock, flags);
return IRQ_RETVAL(handled);
}
#endif
......@@ -1183,9 +989,9 @@ static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
* Inputs : instance - instantiation of the 5380 driver on which this
* target lives, cmd - SCSI command to execute.
*
* Returns : -1 if selection could not execute for some reason,
* 0 if selection succeeded or failed because the target
* did not respond.
* Returns cmd if selection failed but should be retried,
* NULL if selection failed and should not be retried, or
* NULL if selection succeeded (hostdata->connected == cmd).
*
* Side effects :
* If bus busy, arbitration failed, etc, NCR5380_select() will exit
......@@ -1199,29 +1005,29 @@ static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
*
* If failed (no target) : cmd->scsi_done() will be called, and the
* cmd->result host byte set to DID_BAD_TARGET.
*
* Locks: caller holds hostdata lock in IRQ mode
*/
static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char tmp[3], phase;
unsigned char *data;
int len;
unsigned long timeout;
unsigned char value;
int err;
NCR5380_setup(instance);
if (hostdata->selecting)
goto part2;
hostdata->restart_select = 0;
NCR5380_dprint(NDEBUG_ARBITRATION, instance);
dprintk(NDEBUG_ARBITRATION, "scsi%d : starting arbitration, id = %d\n", instance->host_no, instance->this_id);
dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n",
instance->this_id);
/*
* Arbitration and selection phases are slow and involve dropping the
* lock, so we have to watch out for EH. An exception handler may
* change 'selecting' to NULL. This function will then return NULL
* so that the caller will forget about 'cmd'. (During information
* transfer phases, EH may change 'connected' to NULL.)
*/
hostdata->selecting = cmd;
/*
* Set the phase bits to 0, otherwise the NCR5380 won't drive the
......@@ -1237,64 +1043,77 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
NCR5380_write(MODE_REG, MR_ARBITRATE);
/* The chip now waits for BUS FREE phase. Then after the 800 ns
* Bus Free Delay, arbitration will begin.
*/
/* We can be relaxed here, interrupts are on, we are
in workqueue context, the birds are singing in the trees */
spin_unlock_irq(instance->host_lock);
err = NCR5380_poll_politely(instance, INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS, ICR_ARBITRATION_PROGRESS, 5*HZ);
spin_lock_irq(instance->host_lock);
spin_unlock_irq(&hostdata->lock);
err = NCR5380_poll_politely2(instance, MODE_REG, MR_ARBITRATE, 0,
INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS,
ICR_ARBITRATION_PROGRESS, HZ);
spin_lock_irq(&hostdata->lock);
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) {
/* Reselection interrupt */
goto out;
}
if (err < 0) {
printk(KERN_DEBUG "scsi: arbitration timeout at %d\n", __LINE__);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
goto failed;
shost_printk(KERN_ERR, instance,
"select: arbitration timeout\n");
goto out;
}
spin_unlock_irq(&hostdata->lock);
dprintk(NDEBUG_ARBITRATION, "scsi%d : arbitration complete\n", instance->host_no);
/*
* The arbitration delay is 2.2us, but this is a minimum and there is
* no maximum so we can safely sleep for ceil(2.2) usecs to accommodate
* the integral nature of udelay().
*
*/
/* The SCSI-2 arbitration delay is 2.4 us */
udelay(3);
/* Check for lost arbitration */
if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) ||
(NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) ||
(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
dprintk(NDEBUG_ARBITRATION, "scsi%d : lost arbitration, deasserting MR_ARBITRATE\n", instance->host_no);
goto failed;
dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n");
spin_lock_irq(&hostdata->lock);
goto out;
}
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_SEL);
if (!(hostdata->flags & FLAG_DTC3181E) &&
/* RvC: DTC3181E has some trouble with this
* so we simply removed it. Seems to work with
* only Mustek scanner attached
/* After/during arbitration, BSY should be asserted.
* IBM DPES-31080 Version S31Q works now
* Tnx to Thomas_Roesch@m2.maus.de for finding this! (Roman)
*/
(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_ARBITRATION, "scsi%d : lost arbitration, deasserting ICR_ASSERT_SEL\n", instance->host_no);
goto failed;
}
NCR5380_write(INITIATOR_COMMAND_REG,
ICR_BASE | ICR_ASSERT_SEL | ICR_ASSERT_BSY);
/*
* Again, bus clear + bus settle time is 1.2us, however, this is
* a minimum so we'll udelay ceil(1.2)
*/
if (hostdata->flags & FLAG_TOSHIBA_DELAY)
udelay(15);
else
udelay(2);
dprintk(NDEBUG_ARBITRATION, "scsi%d : won arbitration\n", instance->host_no);
spin_lock_irq(&hostdata->lock);
/* NCR5380_reselect() clears MODE_REG after a reselection interrupt */
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE))
goto out;
if (!hostdata->selecting) {
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
goto out;
}
dsprintk(NDEBUG_ARBITRATION, instance, "won arbitration\n");
/*
* Now that we have won arbitration, start Selection process, asserting
* the host and target ID's on the SCSI bus.
*/
NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << scmd_id(cmd))));
NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask | (1 << scmd_id(cmd)));
/*
* Raise ATN while SEL is true before BSY goes false from arbitration,
......@@ -1302,7 +1121,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* phase immediately after selection.
*/
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY |
ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL);
NCR5380_write(MODE_REG, MR_BASE);
/*
......@@ -1311,6 +1131,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
*/
NCR5380_write(SELECT_ENABLE_REG, 0);
spin_unlock_irq(&hostdata->lock);
/*
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
......@@ -1318,7 +1140,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
/* Reset BSY */
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA |
ICR_ASSERT_ATN | ICR_ASSERT_SEL);
/*
* Something weird happens when we cease to drive BSY - looks
......@@ -1339,47 +1162,40 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
udelay(1);
dprintk(NDEBUG_SELECTION, "scsi%d : selecting target %d\n", instance->host_no, scmd_id(cmd));
dsprintk(NDEBUG_SELECTION, instance, "selecting target %d\n", scmd_id(cmd));
/*
* The SCSI specification calls for a 250 ms timeout for the actual
* selection.
*/
timeout = jiffies + msecs_to_jiffies(250);
/*
* XXX very interesting - we're seeing a bounce where the BSY we
* asserted is being reflected / still asserted (propagation delay?)
* and it's detecting as true. Sigh.
*/
hostdata->select_time = 0; /* we count the clock ticks at which we polled */
hostdata->selecting = cmd;
part2:
/* RvC: here we enter after a sleeping period, or immediately after
execution of part 1
we poll only once ech clock tick */
value = NCR5380_read(STATUS_REG) & (SR_BSY | SR_IO);
if (!value && (hostdata->select_time < HZ/4)) {
/* RvC: we still must wait for a device response */
hostdata->select_time++; /* after 25 ticks the device has failed */
NCR5380_set_timer(hostdata, 1);
return 0; /* RvC: we return here with hostdata->selecting set,
to go to sleep */
}
err = NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, SR_BSY,
msecs_to_jiffies(250));
hostdata->selecting = NULL;/* clear this pointer, because we passed the
waiting period */
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_reselect(instance);
printk("scsi%d : reselection after won arbitration?\n", instance->host_no);
if (!hostdata->connected)
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
shost_printk(KERN_ERR, instance, "reselection after won arbitration?\n");
goto out;
}
if (err < 0) {
spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/* Can't touch cmd if it has been reclaimed by the scsi ML */
if (hostdata->selecting) {
cmd->result = DID_BAD_TARGET << 16;
complete_cmd(instance, cmd);
dsprintk(NDEBUG_SELECTION, instance, "target did not respond within 250ms\n");
cmd = NULL;
}
goto out;
}
/*
* No less than two deskew delays after the initiator detects the
* BSY signal is true, it shall release the SEL signal and may
......@@ -1390,25 +1206,6 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
if (!(NCR5380_read(STATUS_REG) & SR_BSY)) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
if (hostdata->targets_present & (1 << scmd_id(cmd))) {
printk(KERN_DEBUG "scsi%d : weirdness\n", instance->host_no);
if (hostdata->restart_select)
printk(KERN_DEBUG "\trestart select\n");
NCR5380_dprint(NDEBUG_SELECTION, instance);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
}
cmd->result = DID_BAD_TARGET << 16;
cmd->scsi_done(cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
dprintk(NDEBUG_SELECTION, "scsi%d : target did not respond within 250ms\n", instance->host_no);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return 0;
}
hostdata->targets_present |= (1 << scmd_id(cmd));
/*
* Since we followed the SCSI spec, and raised ATN while SEL
* was true but before BSY was false during selection, the information
......@@ -1426,17 +1223,21 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
/* Wait for start of REQ/ACK handshake */
spin_unlock_irq(instance->host_lock);
err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
spin_lock_irq(instance->host_lock);
if(err) {
printk(KERN_ERR "scsi%d: timeout at NCR5380.c:%d\n", instance->host_no, __LINE__);
spin_lock_irq(&hostdata->lock);
if (err < 0) {
shost_printk(KERN_ERR, instance, "select: REQ timeout\n");
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
goto failed;
goto out;
}
if (!hostdata->selecting) {
do_abort(instance);
goto out;
}
dprintk(NDEBUG_SELECTION, "scsi%d : target %d selected, going into MESSAGE OUT phase.\n", instance->host_no, cmd->device->id);
dsprintk(NDEBUG_SELECTION, instance, "target %d selected, going into MESSAGE OUT phase.\n",
scmd_id(cmd));
tmp[0] = IDENTIFY(((instance->irq == NO_IRQ) ? 0 : 1), cmd->device->lun);
len = 1;
......@@ -1446,19 +1247,21 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
data = tmp;
phase = PHASE_MSGOUT;
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_SELECTION, "scsi%d : nexus established.\n", instance->host_no);
dsprintk(NDEBUG_SELECTION, instance, "nexus established.\n");
/* XXX need to handle errors here */
hostdata->connected = cmd;
hostdata->busy[cmd->device->id] |= (1 << (cmd->device->lun & 0xFF));
hostdata->busy[cmd->device->id] |= 1 << cmd->device->lun;
initialize_SCp(cmd);
return 0;
/* Selection failed */
failed:
return -1;
cmd = NULL;
out:
if (!hostdata->selecting)
return NULL;
hostdata->selecting = NULL;
return cmd;
}
/*
......@@ -1472,7 +1275,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* bytes to transfer, **data - pointer to data pointer.
*
* Returns : -1 when different phase is entered without transferring
* maximum number of bytes, 0 if all bytes or transferred or exit
* maximum number of bytes, 0 if all bytes are transferred or exit
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
......@@ -1486,22 +1289,13 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* counts, we will always do a pseudo DMA or DMA transfer.
*/
static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
NCR5380_local_declare();
static int NCR5380_transfer_pio(struct Scsi_Host *instance,
unsigned char *phase, int *count,
unsigned char **data)
{
unsigned char p = *phase, tmp;
int c = *count;
unsigned char *d = *data;
/*
* RvC: some administrative data to process polling time
*/
int break_allowed = 0;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
NCR5380_setup(instance);
if (!(p & SR_IO))
dprintk(NDEBUG_PIO, "scsi%d : pio write %d bytes\n", instance->host_no, c);
else
dprintk(NDEBUG_PIO, "scsi%d : pio read %d bytes\n", instance->host_no, c);
/*
* The NCR5380 chip will only drive the SCSI bus when the
......@@ -1511,39 +1305,24 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
/* RvC: don't know if this is necessary, but other SCSI I/O is short
* so breaks are not necessary there
*/
if ((p == PHASE_DATAIN) || (p == PHASE_DATAOUT)) {
break_allowed = 1;
}
do {
/*
* Wait for assertion of REQ, after which the phase bits will be
* valid
*/
/* RvC: we simply poll once, after that we stop temporarily
* and let the device buffer fill up
* if breaking is not allowed, we keep polling as long as needed
*/
/* FIXME */
while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ) && !break_allowed);
if (!(tmp & SR_REQ)) {
/* timeout condition */
NCR5380_set_timer(hostdata, USLEEP_SLEEP);
if (NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ) < 0)
break;
}
dprintk(NDEBUG_HANDSHAKE, "scsi%d : REQ detected\n", instance->host_no);
dsprintk(NDEBUG_HANDSHAKE, instance, "REQ asserted\n");
/* Check for phase mismatch */
if ((tmp & PHASE_MASK) != p) {
dprintk(NDEBUG_HANDSHAKE, "scsi%d : phase mismatch\n", instance->host_no);
NCR5380_dprint_phase(NDEBUG_HANDSHAKE, instance);
if ((NCR5380_read(STATUS_REG) & PHASE_MASK) != p) {
dsprintk(NDEBUG_PIO, instance, "phase mismatch\n");
NCR5380_dprint_phase(NDEBUG_PIO, instance);
break;
}
/* Do actual transfer from SCSI bus to / from memory */
if (!(p & SR_IO))
NCR5380_write(OUTPUT_DATA_REG, *d);
......@@ -1563,20 +1342,25 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
if (!((p & SR_MSG) && c > 1)) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA);
NCR5380_dprint(NDEBUG_PIO, instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ACK);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
ICR_ASSERT_DATA | ICR_ASSERT_ACK);
} else {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
ICR_ASSERT_DATA | ICR_ASSERT_ATN);
NCR5380_dprint(NDEBUG_PIO, instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
}
} else {
NCR5380_dprint(NDEBUG_PIO, instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ACK);
}
/* FIXME - if this fails bus reset ?? */
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 5*HZ);
dprintk(NDEBUG_HANDSHAKE, "scsi%d : req false, handshake complete\n", instance->host_no);
if (NCR5380_poll_politely(instance,
STATUS_REG, SR_REQ, 0, 5 * HZ) < 0)
break;
dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n");
/*
* We have several special cases to consider during REQ/ACK handshaking :
......@@ -1597,12 +1381,16 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
}
} while (--c);
dprintk(NDEBUG_PIO, "scsi%d : residual %d\n", instance->host_no, c);
dsprintk(NDEBUG_PIO, instance, "residual %d\n", c);
*count = c;
*data = d;
tmp = NCR5380_read(STATUS_REG);
if (tmp & SR_REQ)
/* The phase read from the bus is valid if either REQ is (already)
* asserted or if ACK hasn't been released yet. The latter applies if
* we're in MSG IN, DATA IN or STATUS and all bytes have been received.
*/
if ((tmp & SR_REQ) || ((tmp & SR_IO) && c == 0))
*phase = tmp & PHASE_MASK;
else
*phase = PHASE_UNKNOWN;
......@@ -1615,43 +1403,43 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
/**
* do_reset - issue a reset command
* @host: adapter to reset
* @instance: adapter to reset
*
* Issue a reset sequence to the NCR5380 and try and get the bus
* back into sane shape.
*
* Locks: caller holds queue lock
* This clears the reset interrupt flag because there may be no handler for
* it. When the driver is initialized, the NCR5380_intr() handler has not yet
* been installed. And when in EH we may have released the ST DMA interrupt.
*/
static void do_reset(struct Scsi_Host *host) {
NCR5380_local_declare();
NCR5380_setup(host);
static void do_reset(struct Scsi_Host *instance)
{
unsigned long flags;
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
local_irq_save(flags);
NCR5380_write(TARGET_COMMAND_REG,
PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
udelay(25);
udelay(50);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
local_irq_restore(flags);
}
/*
* Function : do_abort (Scsi_Host *host)
*
* Purpose : abort the currently established nexus. Should only be
* called from a routine which can drop into a
*
* Returns : 0 on success, -1 on failure.
/**
* do_abort - abort the currently established nexus by going to
* MESSAGE OUT phase and sending an ABORT message.
* @instance: relevant scsi host instance
*
* Locks: queue lock held by caller
* FIXME: sort this out and get new_eh running
* Returns 0 on success, -1 on failure.
*/
static int do_abort(struct Scsi_Host *host) {
NCR5380_local_declare();
static int do_abort(struct Scsi_Host *instance)
{
unsigned char *msgptr, phase, tmp;
int len;
int rc;
NCR5380_setup(host);
/* Request message out phase */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
......@@ -1666,27 +1454,28 @@ static int do_abort(struct Scsi_Host *host) {
* the target sees, so we just handshake.
*/
rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, SR_REQ, 60 * HZ);
if(rc < 0)
return -1;
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 10 * HZ);
if (rc < 0)
goto timeout;
tmp = (unsigned char)rc;
tmp = NCR5380_read(STATUS_REG) & PHASE_MASK;
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
if ((tmp & PHASE_MASK) != PHASE_MSGOUT) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, 0, 3*HZ);
if (tmp != PHASE_MSGOUT) {
NCR5380_write(INITIATOR_COMMAND_REG,
ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
if (rc < 0)
goto timeout;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
if(rc == -1)
return -1;
}
tmp = ABORT;
msgptr = &tmp;
len = 1;
phase = PHASE_MSGOUT;
NCR5380_transfer_pio(host, &phase, &len, &msgptr);
NCR5380_transfer_pio(instance, &phase, &len, &msgptr);
/*
* If we got here, and the command completed successfully,
......@@ -1694,6 +1483,10 @@ static int do_abort(struct Scsi_Host *host) {
*/
return len ? -1 : 0;
timeout:
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
return -1;
}
#if defined(REAL_DMA) || defined(PSEUDO_DMA) || defined (REAL_DMA_POLL)
......@@ -1713,13 +1506,14 @@ static int do_abort(struct Scsi_Host *host) {
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
*
* Locks: io_request lock held by caller
*/
static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
NCR5380_local_declare();
static int NCR5380_transfer_dma(struct Scsi_Host *instance,
unsigned char *phase, int *count,
unsigned char **data)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
register int c = *count;
register unsigned char p = *phase;
register unsigned char *d = *data;
......@@ -1730,30 +1524,28 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
unsigned char saved_data = 0, overrun = 0, residue;
#endif
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
NCR5380_setup(instance);
if ((tmp = (NCR5380_read(STATUS_REG) & PHASE_MASK)) != p) {
*phase = tmp;
return -1;
}
#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
#ifdef READ_OVERRUNS
if (p & SR_IO) {
if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS))
c -= 2;
}
#endif
dprintk(NDEBUG_DMA, "scsi%d : initializing DMA channel %d for %s, %d bytes %s %0x\n", instance->host_no, instance->dma_channel, (p & SR_IO) ? "reading" : "writing", c, (p & SR_IO) ? "to" : "from", (unsigned) d);
hostdata->dma_len = (p & SR_IO) ? NCR5380_dma_read_setup(instance, d, c) : NCR5380_dma_write_setup(instance, d, c);
dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n",
(p & SR_IO) ? "receive" : "send", c, *data);
#endif
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
#ifdef REAL_DMA
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
MR_ENABLE_EOP_INTR);
#elif defined(REAL_DMA_POLL)
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE);
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
#else
/*
* Note : on my sample board, watch-dog timeouts occurred when interrupts
......@@ -1761,16 +1553,11 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
* before the setting of DMA mode to after transfer of the last byte.
*/
#if defined(PSEUDO_DMA) && defined(UNSAFE)
spin_unlock_irq(instance->host_lock);
#endif
/* KLL May need eop and parity in 53c400 */
if (hostdata->flags & FLAG_NCR53C400)
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE |
MR_ENABLE_PAR_CHECK | MR_ENABLE_PAR_INTR |
MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
if (hostdata->flags & FLAG_NO_DMA_FIXUP)
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
MR_ENABLE_EOP_INTR);
else
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE);
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
#endif /* def REAL_DMA */
dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG));
......@@ -1797,49 +1584,49 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
} while ((tmp & BASR_PHASE_MATCH) && !(tmp & (BASR_BUSY_ERROR | BASR_END_DMA_TRANSFER)));
/*
At this point, either we've completed DMA, or we have a phase mismatch,
or we've unexpectedly lost BUSY (which is a real error).
For write DMAs, we want to wait until the last byte has been
transferred out over the bus before we turn off DMA mode. Alas, there
seems to be no terribly good way of doing this on a 5380 under all
conditions. For non-scatter-gather operations, we can wait until REQ
and ACK both go false, or until a phase mismatch occurs. Gather-writes
are nastier, since the device will be expecting more data than we
are prepared to send it, and REQ will remain asserted. On a 53C8[01] we
could test LAST BIT SENT to assure transfer (I imagine this is precisely
why this signal was added to the newer chips) but on the older 538[01]
this signal does not exist. The workaround for this lack is a watchdog;
we bail out of the wait-loop after a modest amount of wait-time if
the usual exit conditions are not met. Not a terribly clean or
correct solution :-%
Reads are equally tricky due to a nasty characteristic of the NCR5380.
If the chip is in DMA mode for an READ, it will respond to a target's
REQ by latching the SCSI data into the INPUT DATA register and asserting
ACK, even if it has _already_ been notified by the DMA controller that
the current DMA transfer has completed! If the NCR5380 is then taken
out of DMA mode, this already-acknowledged byte is lost.
This is not a problem for "one DMA transfer per command" reads, because
the situation will never arise... either all of the data is DMA'ed
properly, or the target switches to MESSAGE IN phase to signal a
disconnection (either operation bringing the DMA to a clean halt).
However, in order to handle scatter-reads, we must work around the
problem. The chosen fix is to DMA N-2 bytes, then check for the
condition before taking the NCR5380 out of DMA mode. One or two extra
bytes are transferred via PIO as necessary to fill out the original
request.
* At this point, either we've completed DMA, or we have a phase mismatch,
* or we've unexpectedly lost BUSY (which is a real error).
*
* For DMA sends, we want to wait until the last byte has been
* transferred out over the bus before we turn off DMA mode. Alas, there
* seems to be no terribly good way of doing this on a 5380 under all
* conditions. For non-scatter-gather operations, we can wait until REQ
* and ACK both go false, or until a phase mismatch occurs. Gather-sends
* are nastier, since the device will be expecting more data than we
* are prepared to send it, and REQ will remain asserted. On a 53C8[01] we
* could test Last Byte Sent to assure transfer (I imagine this is precisely
* why this signal was added to the newer chips) but on the older 538[01]
* this signal does not exist. The workaround for this lack is a watchdog;
* we bail out of the wait-loop after a modest amount of wait-time if
* the usual exit conditions are not met. Not a terribly clean or
* correct solution :-%
*
* DMA receive is equally tricky due to a nasty characteristic of the NCR5380.
* If the chip is in DMA receive mode, it will respond to a target's
* REQ by latching the SCSI data into the INPUT DATA register and asserting
* ACK, even if it has _already_ been notified by the DMA controller that
* the current DMA transfer has completed! If the NCR5380 is then taken
* out of DMA mode, this already-acknowledged byte is lost. This is
* not a problem for "one DMA transfer per READ command", because
* the situation will never arise... either all of the data is DMA'ed
* properly, or the target switches to MESSAGE IN phase to signal a
* disconnection (either operation bringing the DMA to a clean halt).
* However, in order to handle scatter-receive, we must work around the
* problem. The chosen fix is to DMA N-2 bytes, then check for the
* condition before taking the NCR5380 out of DMA mode. One or two extra
* bytes are transferred via PIO as necessary to fill out the original
* request.
*/
if (p & SR_IO) {
#ifdef READ_OVERRUNS
if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS)) {
udelay(10);
if (((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) == (BASR_PHASE_MATCH | BASR_ACK))) {
if ((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) ==
(BASR_PHASE_MATCH | BASR_ACK)) {
saved_data = NCR5380_read(INPUT_DATA_REGISTER);
overrun = 1;
}
#endif
}
} else {
int limit = 100;
while (((tmp = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_ACK) || (NCR5380_read(STATUS_REG) & SR_REQ)) {
......@@ -1850,7 +1637,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
}
}
dprintk(NDEBUG_DMA, "scsi%d : polled DMA transfer complete, basr 0x%X, sr 0x%X\n", instance->host_no, tmp, NCR5380_read(STATUS_REG));
dsprintk(NDEBUG_DMA, "polled DMA transfer complete, basr 0x%02x, sr 0x%02x\n",
tmp, NCR5380_read(STATUS_REG));
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
......@@ -1861,8 +1649,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
*data += c;
*phase = NCR5380_read(STATUS_REG) & PHASE_MASK;
#ifdef READ_OVERRUNS
if (*phase == p && (p & SR_IO) && residue == 0) {
if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS) &&
*phase == p && (p & SR_IO) && residue == 0) {
if (overrun) {
dprintk(NDEBUG_DMA, "Got an input overrun, using saved byte\n");
**data = saved_data;
......@@ -1877,7 +1665,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
NCR5380_transfer_pio(instance, phase, &cnt, data);
*count -= toPIO - cnt;
}
#endif
dprintk(NDEBUG_DMA, "Return with data ptr = 0x%X, count %d, last 0x%X, next 0x%X\n", *data, *count, *(*data + *count - 1), *(*data + *count));
return 0;
......@@ -1886,14 +1673,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
return 0;
#else /* defined(REAL_DMA_POLL) */
if (p & SR_IO) {
#ifdef DMA_WORKS_RIGHT
foo = NCR5380_pread(instance, d, c);
#else
int diff = 1;
if (hostdata->flags & FLAG_NCR53C400) {
diff = 0;
}
if (!(foo = NCR5380_pread(instance, d, c - diff))) {
foo = NCR5380_pread(instance, d,
hostdata->flags & FLAG_NO_DMA_FIXUP ? c : c - 1);
if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
/*
* We can't disable DMA mode after successfully transferring
* what we plan to be the last byte, since that would open up
......@@ -1916,65 +1698,39 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
* byte.
*/
if (!(hostdata->flags & FLAG_NCR53C400)) {
while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ));
/* Wait for clean handshake */
while (NCR5380_read(STATUS_REG) & SR_REQ);
d[c - 1] = NCR5380_read(INPUT_DATA_REG);
if (NCR5380_poll_politely(instance, BUS_AND_STATUS_REG,
BASR_DRQ, BASR_DRQ, HZ) < 0) {
foo = -1;
shost_printk(KERN_ERR, instance, "PDMA read: DRQ timeout\n");
}
if (NCR5380_poll_politely(instance, STATUS_REG,
SR_REQ, 0, HZ) < 0) {
foo = -1;
shost_printk(KERN_ERR, instance, "PDMA read: !REQ timeout\n");
}
d[c - 1] = NCR5380_read(INPUT_DATA_REG);
}
#endif
} else {
#ifdef DMA_WORKS_RIGHT
foo = NCR5380_pwrite(instance, d, c);
#else
int timeout;
dprintk(NDEBUG_C400_PWRITE, "About to pwrite %d bytes\n", c);
if (!(foo = NCR5380_pwrite(instance, d, c))) {
if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
/*
* Wait for the last byte to be sent. If REQ is being asserted for
* the byte we're interested, we'll ACK it and it will go false.
*/
if (!(hostdata->flags & FLAG_HAS_LAST_BYTE_SENT)) {
timeout = 20000;
while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH));
if (!timeout)
dprintk(NDEBUG_LAST_BYTE_SENT, "scsi%d : timed out on last byte\n", instance->host_no);
if (hostdata->flags & FLAG_CHECK_LAST_BYTE_SENT) {
hostdata->flags &= ~FLAG_CHECK_LAST_BYTE_SENT;
if (NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT) {
hostdata->flags |= FLAG_HAS_LAST_BYTE_SENT;
dprintk(NDEBUG_LAST_BYTE_SENT, "scsi%d : last byte sent works\n", instance->host_no);
}
}
} else {
dprintk(NDEBUG_C400_PWRITE, "Waiting for LASTBYTE\n");
while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT));
dprintk(NDEBUG_C400_PWRITE, "Got LASTBYTE\n");
if (NCR5380_poll_politely2(instance,
BUS_AND_STATUS_REG, BASR_DRQ, BASR_DRQ,
BUS_AND_STATUS_REG, BASR_PHASE_MATCH, 0, HZ) < 0) {
foo = -1;
shost_printk(KERN_ERR, instance, "PDMA write: DRQ and phase timeout\n");
}
}
#endif
}
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
if ((!(p & SR_IO)) && (hostdata->flags & FLAG_NCR53C400)) {
dprintk(NDEBUG_C400_PWRITE, "53C400w: Checking for IRQ\n");
if (NCR5380_read(BUS_AND_STATUS_REG) & BASR_IRQ) {
dprintk(NDEBUG_C400_PWRITE, "53C400w: got it, reading reset interrupt reg\n");
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else {
printk("53C400w: IRQ NOT THERE!\n");
}
}
*data = d + c;
*count = 0;
*phase = NCR5380_read(STATUS_REG) & PHASE_MASK;
#if defined(PSEUDO_DMA) && defined(UNSAFE)
spin_lock_irq(instance->host_lock);
#endif /* defined(REAL_DMA_POLL) */
return foo;
#endif /* def REAL_DMA */
}
......@@ -1995,13 +1751,11 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
*
* XXX Note : we need to watch for bus free or a reset condition here
* to recover from an unexpected bus free condition.
*
* Locks: io_request_lock held by caller in IRQ mode
*/
static void NCR5380_information_transfer(struct Scsi_Host *instance) {
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *)instance->hostdata;
static void NCR5380_information_transfer(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char msgout = NOP;
int sink = 0;
int len;
......@@ -2010,13 +1764,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
#endif
unsigned char *data;
unsigned char phase, tmp, extended_msg[10], old_phase = 0xff;
struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected;
/* RvC: we need to set the end of the polling time */
unsigned long poll_time = jiffies + USLEEP_POLL;
struct scsi_cmnd *cmd;
NCR5380_setup(instance);
while ((cmd = hostdata->connected)) {
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
while (1) {
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
......@@ -2028,23 +1780,27 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
if (sink && (phase != PHASE_MSGOUT)) {
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
while (NCR5380_read(STATUS_REG) & SR_REQ);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN |
ICR_ASSERT_ACK);
while (NCR5380_read(STATUS_REG) & SR_REQ)
;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
ICR_ASSERT_ATN);
sink = 0;
continue;
}
switch (phase) {
case PHASE_DATAIN:
case PHASE_DATAOUT:
#if (NDEBUG & NDEBUG_NO_DATAOUT)
printk("scsi%d : NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n", instance->host_no);
shost_printk(KERN_DEBUG, instance, "NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n");
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
cmd->scsi_done(cmd);
complete_cmd(instance, cmd);
return;
#endif
case PHASE_DATAIN:
/*
* If there is no room left in the current buffer in the
* scatter-gather list, move onto the next one.
......@@ -2055,8 +1811,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
--cmd->SCp.buffers_residual;
cmd->SCp.this_residual = cmd->SCp.buffer->length;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
dprintk(NDEBUG_INFORMATION, "scsi%d : %d bytes and %d buffers left\n", instance->host_no, cmd->SCp.this_residual, cmd->SCp.buffers_residual);
dsprintk(NDEBUG_INFORMATION, instance, "%d bytes and %d buffers left\n",
cmd->SCp.this_residual,
cmd->SCp.buffers_residual);
}
/*
* The preferred transfer method is going to be
* PSEUDO-DMA for systems that are strictly PIO,
......@@ -2068,50 +1827,39 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
*/
#if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL)
/* KLL
* PSEUDO_DMA is defined here. If this is the g_NCR5380
* driver then it will always be defined, so the
* FLAG_NO_PSEUDO_DMA is used to inhibit PDMA in the base
* NCR5380 case. I think this is a fairly clean solution.
* We supplement these 2 if's with the flag.
*/
#ifdef NCR5380_dma_xfer_len
if (!cmd->device->borken && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && (transfersize = NCR5380_dma_xfer_len(instance, cmd)) != 0) {
#else
transfersize = cmd->transfersize;
#ifdef LIMIT_TRANSFERSIZE /* If we have problems with interrupt service */
if (transfersize > 512)
transfersize = 512;
#endif /* LIMIT_TRANSFERSIZE */
if (!cmd->device->borken && transfersize && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) {
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks. */
if (transfersize > 32 * 1024)
transfersize = 32 * 1024;
#endif
transfersize = 0;
if (!cmd->device->borken &&
!(hostdata->flags & FLAG_NO_PSEUDO_DMA))
transfersize = NCR5380_dma_xfer_len(instance, cmd, phase);
if (transfersize) {
len = transfersize;
if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) {
if (NCR5380_transfer_dma(instance, &phase,
&len, (unsigned char **)&cmd->SCp.ptr)) {
/*
* If the watchdog timer fires, all future accesses to this
* device will use the polled-IO.
* If the watchdog timer fires, all future
* accesses to this device will use the
* polled-IO.
*/
scmd_printk(KERN_INFO, cmd,
"switching to slow handshake\n");
cmd->device->borken = 1;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
cmd->scsi_done(cmd);
complete_cmd(instance, cmd);
/* XXX - need to source or sink data here, as appropriate */
} else
cmd->SCp.this_residual -= transfersize - len;
} else
#endif /* defined(PSEUDO_DMA) || defined(REAL_DMA_POLL) */
NCR5380_transfer_pio(instance, &phase, (int *) &cmd->SCp.this_residual, (unsigned char **)
&cmd->SCp.ptr);
{
spin_unlock_irq(&hostdata->lock);
NCR5380_transfer_pio(instance, &phase,
(int *)&cmd->SCp.this_residual,
(unsigned char **)&cmd->SCp.ptr);
spin_lock_irq(&hostdata->lock);
}
break;
case PHASE_MSGIN:
len = 1;
......@@ -2120,101 +1868,42 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
cmd->SCp.Message = tmp;
switch (tmp) {
/*
* Linking lets us reduce the time required to get the
* next command out to the device, hopefully this will
* mean we don't waste another revolution due to the delays
* required by ARBITRATION and another SELECTION.
*
* In the current implementation proposal, low level drivers
* merely have to start the next command, pointed to by
* next_link, done() is called as with unlinked commands.
*/
#ifdef LINKED
case LINKED_CMD_COMPLETE:
case LINKED_FLG_CMD_COMPLETE:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_LINKED, "scsi%d : target %d lun %llu linked command complete.\n", instance->host_no, cmd->device->id, cmd->device->lun);
/*
* Sanity check : A linked command should only terminate with
* one of these messages if there are more linked commands
* available.
*/
if (!cmd->next_link) {
printk("scsi%d : target %d lun %llu linked command complete, no next_link\n" instance->host_no, cmd->device->id, cmd->device->lun);
sink = 1;
do_abort(instance);
return;
}
initialize_SCp(cmd->next_link);
/* The next command is still part of this process */
cmd->next_link->tag = cmd->tag;
cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
dprintk(NDEBUG_LINKED, "scsi%d : target %d lun %llu linked request done, calling scsi_done().\n", instance->host_no, cmd->device->id, cmd->device->lun);
cmd->scsi_done(cmd);
cmd = hostdata->connected;
break;
#endif /* def LINKED */
case ABORT:
case COMMAND_COMPLETE:
/* Accept message by clearing ACK */
sink = 1;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
hostdata->connected = NULL;
dprintk(NDEBUG_QUEUES, "scsi%d : command for target %d, lun %llu completed\n", instance->host_no, cmd->device->id, cmd->device->lun);
hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xFF));
/*
* I'm not sure what the correct thing to do here is :
*
* If the command that just executed is NOT a request
* sense, the obvious thing to do is to set the result
* code to the values of the stored parameters.
*
* If it was a REQUEST SENSE command, we need some way
* to differentiate between the failure code of the original
* and the failure code of the REQUEST sense - the obvious
* case is success, where we fall through and leave the result
* code unchanged.
*
* The non-obvious place is where the REQUEST SENSE failed
*/
if (cmd->cmnd[0] != REQUEST_SENSE)
cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
else if (status_byte(cmd->SCp.Status) != GOOD)
cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
if ((cmd->cmnd[0] == REQUEST_SENSE) &&
hostdata->ses.cmd_len) {
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
hostdata->ses.cmd_len = 0 ;
}
dsprintk(NDEBUG_QUEUES, instance,
"COMMAND COMPLETE %p target %d lun %llu\n",
cmd, scmd_id(cmd), cmd->device->lun);
if ((cmd->cmnd[0] != REQUEST_SENSE) && (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
hostdata->connected = NULL;
dprintk(NDEBUG_AUTOSENSE, "scsi%d : performing request sense\n", instance->host_no);
cmd->result &= ~0xffff;
cmd->result |= cmd->SCp.Status;
cmd->result |= cmd->SCp.Message << 8;
LIST(cmd, hostdata->issue_queue);
cmd->host_scribble = (unsigned char *)
hostdata->issue_queue;
hostdata->issue_queue = (struct scsi_cmnd *) cmd;
dprintk(NDEBUG_QUEUES, "scsi%d : REQUEST SENSE added to head of issue queue\n", instance->host_no);
} else {
cmd->scsi_done(cmd);
if (cmd->cmnd[0] == REQUEST_SENSE)
complete_cmd(instance, cmd);
else {
if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION ||
cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) {
dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n",
cmd);
list_add_tail(&ncmd->list,
&hostdata->autosense);
} else
complete_cmd(instance, cmd);
}
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
barrier();
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
case MESSAGE_REJECT:
/* Accept message by clearing ACK */
......@@ -2229,16 +1918,16 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
default:
break;
}
case DISCONNECT:{
break;
case DISCONNECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
cmd->device->disconnect = 1;
LIST(cmd, hostdata->disconnected_queue);
cmd->host_scribble = (unsigned char *)
hostdata->disconnected_queue;
hostdata->connected = NULL;
hostdata->disconnected_queue = cmd;
dprintk(NDEBUG_QUEUES, "scsi%d : command for target %d lun %llu was moved from connected to" " the disconnected_queue\n", instance->host_no, cmd->device->id, cmd->device->lun);
list_add(&ncmd->list, &hostdata->disconnected);
dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
cmd, scmd_id(cmd), cmd->device->lun);
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
......@@ -2247,12 +1936,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/* Wait for bus free to avoid nasty timeouts - FIXME timeout !*/
/* NCR538_poll_politely(instance, STATUS_REG, SR_BSY, 0, 30 * HZ); */
while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
barrier();
return;
}
/*
* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
* operation, in violation of the SCSI spec so we can safely
......@@ -2269,31 +1953,28 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
break;
case EXTENDED_MESSAGE:
/*
* Extended messages are sent in the following format :
* Byte
* 0 EXTENDED_MESSAGE == 1
* 1 length (includes one byte for code, doesn't
* include first two bytes)
* 2 code
* 3..length+1 arguments
*
* Start the extended message buffer with the EXTENDED_MESSAGE
/*
* Start the message buffer with the EXTENDED_MESSAGE
* byte, since spi_print_msg() wants the whole thing.
*/
extended_msg[0] = EXTENDED_MESSAGE;
/* Accept first byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_EXTENDED, "scsi%d : receiving extended message\n", instance->host_no);
spin_unlock_irq(&hostdata->lock);
dsprintk(NDEBUG_EXTENDED, instance, "receiving extended message\n");
len = 2;
data = extended_msg + 1;
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
dsprintk(NDEBUG_EXTENDED, instance, "length %d, code 0x%02x\n",
(int)extended_msg[1],
(int)extended_msg[2]);
dprintk(NDEBUG_EXTENDED, "scsi%d : length=%d, code=0x%02x\n", instance->host_no, (int) extended_msg[1], (int) extended_msg[2]);
if (!len && extended_msg[1] <= (sizeof(extended_msg) - 1)) {
if (!len && extended_msg[1] > 0 &&
extended_msg[1] <= sizeof(extended_msg) - 2) {
/* Accept third byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
len = extended_msg[1] - 1;
......@@ -2301,7 +1982,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_EXTENDED, "scsi%d : message received, residual %d\n", instance->host_no, len);
dsprintk(NDEBUG_EXTENDED, instance, "message received, residual %d\n",
len);
switch (extended_msg[2]) {
case EXTENDED_SDTR:
......@@ -2311,12 +1993,18 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
tmp = 0;
}
} else if (len) {
printk("scsi%d: error receiving extended message\n", instance->host_no);
shost_printk(KERN_ERR, instance, "error receiving extended message\n");
tmp = 0;
} else {
printk("scsi%d: extended message code %02x length %d is too long\n", instance->host_no, extended_msg[2], extended_msg[1]);
shost_printk(KERN_NOTICE, instance, "extended message code %02x length %d is too long\n",
extended_msg[2], extended_msg[1]);
tmp = 0;
}
spin_lock_irq(&hostdata->lock);
if (!hostdata->connected)
return;
/* Fall through to reject message */
/*
......@@ -2325,15 +2013,17 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
*/
default:
if (!tmp) {
printk("scsi%d: rejecting message ", instance->host_no);
shost_printk(KERN_ERR, instance, "rejecting message ");
spi_print_msg(extended_msg);
printk("\n");
} else if (tmp != EXTENDED_MESSAGE)
scmd_printk(KERN_INFO, cmd,
"rejecting unknown message %02x\n",tmp);
"rejecting unknown message %02x\n",
tmp);
else
scmd_printk(KERN_INFO, cmd,
"rejecting unknown extended message code %02x, length %d\n", extended_msg[1], extended_msg[0]);
"rejecting unknown extended message code %02x, length %d\n",
extended_msg[1], extended_msg[0]);
msgout = MESSAGE_REJECT;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
......@@ -2346,10 +2036,9 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
hostdata->last_message = msgout;
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (msgout == ABORT) {
hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xFF));
hostdata->connected = NULL;
cmd->result = DID_ERROR << 16;
cmd->scsi_done(cmd);
complete_cmd(instance, cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
}
......@@ -2364,11 +2053,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
* use the dma transfer function.
*/
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (!cmd->device->disconnect && should_disconnect(cmd->cmnd[0])) {
NCR5380_set_timer(hostdata, USLEEP_SLEEP);
dprintk(NDEBUG_USLEEP, "scsi%d : issued command, sleeping until %lu\n", instance->host_no, hostdata->time_expires);
return;
}
break;
case PHASE_STATIN:
len = 1;
......@@ -2377,20 +2061,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
cmd->SCp.Status = tmp;
break;
default:
printk("scsi%d : unknown phase\n", instance->host_no);
shost_printk(KERN_ERR, instance, "unknown phase\n");
NCR5380_dprint(NDEBUG_ANY, instance);
} /* switch(phase) */
} /* if (tmp * SR_REQ) */
else {
/* RvC: go to sleep if polling time expired
*/
if (!cmd->device->disconnect && time_after_eq(jiffies, poll_time)) {
NCR5380_set_timer(hostdata, USLEEP_SLEEP);
dprintk(NDEBUG_USLEEP, "scsi%d : poll timed out, sleeping until %lu\n", instance->host_no, hostdata->time_expires);
return;
} else {
spin_unlock_irq(&hostdata->lock);
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
spin_lock_irq(&hostdata->lock);
}
}
} /* while (1) */
}
/*
......@@ -2401,22 +2080,18 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
* nexus has been reestablished,
*
* Inputs : instance - this instance of the NCR5380.
*
* Locks: io_request_lock held by caller if IRQ driven
*/
static void NCR5380_reselect(struct Scsi_Host *instance) {
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *)
instance->hostdata;
static void NCR5380_reselect(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char target_mask;
unsigned char lun, phase;
int len;
unsigned char msg[3];
unsigned char *data;
struct scsi_cmnd *tmp = NULL, *prev;
int abort = 0;
NCR5380_setup(instance);
struct NCR5380_cmd *ncmd;
struct scsi_cmnd *tmp;
/*
* Disable arbitration, etc. since the host adapter obviously
......@@ -2424,10 +2099,10 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
*/
NCR5380_write(MODE_REG, MR_BASE);
hostdata->restart_select = 1;
target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask);
dprintk(NDEBUG_SELECTION, "scsi%d : reselect\n", instance->host_no);
dsprintk(NDEBUG_RESELECTION, instance, "reselect\n");
/*
* At this point, we have detected that our SCSI ID is on the bus,
......@@ -2439,34 +2114,41 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
*/
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY);
/* FIXME: timeout too long, must fail to workqueue */
if(NCR5380_poll_politely(instance, STATUS_REG, SR_SEL, 0, 2*HZ)<0)
abort = 1;
if (NCR5380_poll_politely(instance,
STATUS_REG, SR_SEL, 0, 2 * HZ) < 0) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
return;
}
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/*
* Wait for target to go into MSGIN.
* FIXME: timeout needed and fail to work queeu
*/
if(NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 2*HZ))
abort = 1;
if (NCR5380_poll_politely(instance,
STATUS_REG, SR_REQ, SR_REQ, 2 * HZ) < 0) {
do_abort(instance);
return;
}
len = 1;
data = msg;
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (len) {
do_abort(instance);
return;
}
if (!(msg[0] & 0x80)) {
printk(KERN_ERR "scsi%d : expecting IDENTIFY message, got ", instance->host_no);
shost_printk(KERN_ERR, instance, "expecting IDENTIFY message, got ");
spi_print_msg(msg);
abort = 1;
} else {
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
lun = (msg[0] & 0x07);
printk("\n");
do_abort(instance);
return;
}
lun = msg[0] & 0x07;
/*
* We need to add code for SCSI-II to track which devices have
......@@ -2479,36 +2161,38 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
* just reestablished, and remove it from the disconnected queue.
*/
tmp = NULL;
list_for_each_entry(ncmd, &hostdata->disconnected, list) {
struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL; tmp; prev = tmp, tmp = (struct scsi_cmnd *) tmp->host_scribble)
if ((target_mask == (1 << tmp->device->id)) && (lun == (u8)tmp->device->lun)
) {
if (prev) {
REMOVE(prev, prev->host_scribble, tmp, tmp->host_scribble);
prev->host_scribble = tmp->host_scribble;
} else {
REMOVE(-1, hostdata->disconnected_queue, tmp, tmp->host_scribble);
hostdata->disconnected_queue = (struct scsi_cmnd *) tmp->host_scribble;
}
tmp->host_scribble = NULL;
if (target_mask == (1 << scmd_id(cmd)) &&
lun == (u8)cmd->device->lun) {
list_del(&ncmd->list);
tmp = cmd;
break;
}
if (!tmp) {
printk(KERN_ERR "scsi%d : warning : target bitmask %02x lun %d not in disconnect_queue.\n", instance->host_no, target_mask, lun);
}
if (tmp) {
dsprintk(NDEBUG_RESELECTION | NDEBUG_QUEUES, instance,
"reselect: removed %p from disconnected queue\n", tmp);
} else {
shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d not in disconnected queue.\n",
target_mask, lun);
/*
* Since we have an established nexus that we can't do anything with,
* we must abort it.
* Since we have an established nexus that we can't do anything
* with, we must abort it.
*/
abort = 1;
}
do_abort(instance);
return;
}
if (abort) {
do_abort(instance);
} else {
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
hostdata->connected = tmp;
dprintk(NDEBUG_RESELECTION, "scsi%d : nexus established, target = %d, lun = %llu, tag = %d\n", instance->host_no, tmp->device->id, tmp->device->lun, tmp->tag);
}
dsprintk(NDEBUG_RESELECTION, instance, "nexus established, target %d, lun %llu, tag %d\n",
scmd_id(tmp), tmp->device->lun, tmp->tag);
}
/*
......@@ -2525,10 +2209,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
#ifdef REAL_DMA
static void NCR5380_dma_complete(NCR5380_instance * instance) {
NCR5380_local_declare();
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int transferred;
NCR5380_setup(instance);
/*
* XXX this might not be right.
......@@ -2543,7 +2225,6 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) {
NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, BASR_ACK, 0, 5*HZ);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/*
......@@ -2560,190 +2241,251 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) {
}
#endif /* def REAL_DMA */
/*
* Function : int NCR5380_abort (struct scsi_cmnd *cmd)
*
* Purpose : abort a command
/**
* list_find_cmd - test for presence of a command in a linked list
* @haystack: list of commands
* @needle: command to search for
*/
static bool list_find_cmd(struct list_head *haystack,
struct scsi_cmnd *needle)
{
struct NCR5380_cmd *ncmd;
list_for_each_entry(ncmd, haystack, list)
if (NCR5380_to_scmd(ncmd) == needle)
return true;
return false;
}
/**
* list_remove_cmd - remove a command from linked list
* @haystack: list of commands
* @needle: command to remove
*/
static bool list_del_cmd(struct list_head *haystack,
struct scsi_cmnd *needle)
{
if (list_find_cmd(haystack, needle)) {
struct NCR5380_cmd *ncmd = scsi_cmd_priv(needle);
list_del(&ncmd->list);
return true;
}
return false;
}
/**
* NCR5380_abort - scsi host eh_abort_handler() method
* @cmd: the command to be aborted
*
* Inputs : cmd - the scsi_cmnd to abort, code - code to set the
* host byte of the result field to, if zero DID_ABORTED is
* used.
* Try to abort a given command by removing it from queues and/or sending
* the target an abort message. This may not succeed in causing a target
* to abort the command. Nonetheless, the low-level driver must forget about
* the command because the mid-layer reclaims it and it may be re-issued.
*
* Returns : SUCCESS - success, FAILED on failure.
* The normal path taken by a command is as follows. For EH we trace this
* same path to locate and abort the command.
*
* XXX - there is no way to abort the command that is currently
* connected, you have to wait for it to complete. If this is
* a problem, we could implement longjmp() / setjmp(), setjmp()
* called where the loop started in NCR5380_main().
* unissued -> selecting -> [unissued -> selecting ->]... connected ->
* [disconnected -> connected ->]...
* [autosense -> connected ->] done
*
* Locks: host lock taken by caller
* If cmd is unissued then just remove it.
* If cmd is disconnected, try to select the target.
* If cmd is connected, try to send an abort message.
* If cmd is waiting for autosense, give it a chance to complete but check
* that it isn't left connected.
* If cmd was not found at all then presumably it has already been completed,
* in which case return SUCCESS to try to avoid further EH measures.
* If the command has not completed yet, we must not fail to find it.
*/
static int NCR5380_abort(struct scsi_cmnd *cmd)
{
NCR5380_local_declare();
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct scsi_cmnd *tmp, **prev;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned long flags;
int result = SUCCESS;
scmd_printk(KERN_WARNING, cmd, "aborting command\n");
spin_lock_irqsave(&hostdata->lock, flags);
NCR5380_print_status(instance);
#if (NDEBUG & NDEBUG_ANY)
scmd_printk(KERN_INFO, cmd, __func__);
#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
NCR5380_setup(instance);
if (list_del_cmd(&hostdata->unissued, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: removed %p from issue queue\n", cmd);
cmd->result = DID_ABORT << 16;
cmd->scsi_done(cmd); /* No tag or busy flag to worry about */
}
dprintk(NDEBUG_ABORT, "scsi%d : abort called\n", instance->host_no);
dprintk(NDEBUG_ABORT, " basr 0x%X, sr 0x%X\n", NCR5380_read(BUS_AND_STATUS_REG), NCR5380_read(STATUS_REG));
if (hostdata->selecting == cmd) {
dsprintk(NDEBUG_ABORT, instance,
"abort: cmd %p == selecting\n", cmd);
hostdata->selecting = NULL;
cmd->result = DID_ABORT << 16;
complete_cmd(instance, cmd);
goto out;
}
#if 0
/*
* Case 1 : If the command is the currently executing command,
* we'll set the aborted flag and return control so that
* information transfer routine can exit cleanly.
*/
if (list_del_cmd(&hostdata->disconnected, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: removed %p from disconnected list\n", cmd);
cmd->result = DID_ERROR << 16;
if (!hostdata->connected)
NCR5380_select(instance, cmd);
if (hostdata->connected != cmd) {
complete_cmd(instance, cmd);
result = FAILED;
goto out;
}
}
if (hostdata->connected == cmd) {
dprintk(NDEBUG_ABORT, "scsi%d : aborting connected command\n", instance->host_no);
hostdata->aborted = 1;
/*
* We should perform BSY checking, and make sure we haven't slipped
* into BUS FREE.
*/
NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN);
/*
* Since we can't change phases until we've completed the current
* handshake, we have to source or sink a byte of data if the current
* phase is not MSGOUT.
*/
/*
* Return control to the executing NCR drive so we can clear the
* aborted flag and get back into our main loop.
*/
return SUCCESS;
dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd);
hostdata->connected = NULL;
if (do_abort(instance)) {
set_host_byte(cmd, DID_ERROR);
complete_cmd(instance, cmd);
result = FAILED;
goto out;
}
set_host_byte(cmd, DID_ABORT);
#ifdef REAL_DMA
hostdata->dma_len = 0;
#endif
if (cmd->cmnd[0] == REQUEST_SENSE)
complete_cmd(instance, cmd);
else {
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
/*
* Case 2 : If the command hasn't been issued yet, we simply remove it
* from the issue queue.
*/
dprintk(NDEBUG_ABORT, "scsi%d : abort going into loop.\n", instance->host_no);
for (prev = (struct scsi_cmnd **) &(hostdata->issue_queue), tmp = (struct scsi_cmnd *) hostdata->issue_queue; tmp; prev = (struct scsi_cmnd **) &(tmp->host_scribble), tmp = (struct scsi_cmnd *) tmp->host_scribble)
if (cmd == tmp) {
REMOVE(5, *prev, tmp, tmp->host_scribble);
(*prev) = (struct scsi_cmnd *) tmp->host_scribble;
tmp->host_scribble = NULL;
tmp->result = DID_ABORT << 16;
dprintk(NDEBUG_ABORT, "scsi%d : abort removed command from issue queue.\n", instance->host_no);
tmp->scsi_done(tmp);
return SUCCESS;
/* Perform autosense for this command */
list_add(&ncmd->list, &hostdata->autosense);
}
}
#if (NDEBUG & NDEBUG_ABORT)
/* KLL */
else if (prev == tmp)
printk(KERN_ERR "scsi%d : LOOP\n", instance->host_no);
#endif
/*
* Case 3 : If any commands are connected, we're going to fail the abort
* and let the high level SCSI driver retry at a later time or
* issue a reset.
*
* Timeouts, and therefore aborted commands, will be highly unlikely
* and handling them cleanly in this situation would make the common
* case of noresets less efficient, and would pollute our code. So,
* we fail.
*/
if (hostdata->connected) {
dprintk(NDEBUG_ABORT, "scsi%d : abort failed, command connected.\n", instance->host_no);
return FAILED;
if (list_find_cmd(&hostdata->autosense, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: found %p on sense queue\n", cmd);
spin_unlock_irqrestore(&hostdata->lock, flags);
queue_work(hostdata->work_q, &hostdata->main_task);
msleep(1000);
spin_lock_irqsave(&hostdata->lock, flags);
if (list_del_cmd(&hostdata->autosense, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: removed %p from sense queue\n", cmd);
set_host_byte(cmd, DID_ABORT);
complete_cmd(instance, cmd);
goto out;
}
}
/*
* Case 4: If the command is currently disconnected from the bus, and
* there are no connected commands, we reconnect the I_T_L or
* I_T_L_Q nexus associated with it, go into message out, and send
* an abort message.
*
* This case is especially ugly. In order to reestablish the nexus, we
* need to call NCR5380_select(). The easiest way to implement this
* function was to abort if the bus was busy, and let the interrupt
* handler triggered on the SEL for reselect take care of lost arbitrations
* where necessary, meaning interrupts need to be enabled.
*
* When interrupts are enabled, the queues may change - so we
* can't remove it from the disconnected queue before selecting it
* because that could cause a failure in hashing the nexus if that
* device reselected.
*
* Since the queues may change, we can't use the pointers from when we
* first locate it.
*
* So, we must first locate the command, and if NCR5380_select()
* succeeds, then issue the abort, relocate the command and remove
* it from the disconnected queue.
*/
for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; tmp = (struct scsi_cmnd *) tmp->host_scribble)
if (cmd == tmp) {
dprintk(NDEBUG_ABORT, "scsi%d : aborting disconnected command.\n", instance->host_no);
if (hostdata->connected == cmd) {
dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd);
hostdata->connected = NULL;
if (do_abort(instance)) {
set_host_byte(cmd, DID_ERROR);
complete_cmd(instance, cmd);
result = FAILED;
goto out;
}
set_host_byte(cmd, DID_ABORT);
#ifdef REAL_DMA
hostdata->dma_len = 0;
#endif
complete_cmd(instance, cmd);
}
if (NCR5380_select(instance, cmd))
return FAILED;
dprintk(NDEBUG_ABORT, "scsi%d : nexus reestablished.\n", instance->host_no);
out:
if (result == FAILED)
dsprintk(NDEBUG_ABORT, instance, "abort: failed to abort %p\n", cmd);
else
dsprintk(NDEBUG_ABORT, instance, "abort: successfully aborted %p\n", cmd);
do_abort(instance);
queue_work(hostdata->work_q, &hostdata->main_task);
spin_unlock_irqrestore(&hostdata->lock, flags);
for (prev = (struct scsi_cmnd **) &(hostdata->disconnected_queue), tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; prev = (struct scsi_cmnd **) &(tmp->host_scribble), tmp = (struct scsi_cmnd *) tmp->host_scribble)
if (cmd == tmp) {
REMOVE(5, *prev, tmp, tmp->host_scribble);
*prev = (struct scsi_cmnd *) tmp->host_scribble;
tmp->host_scribble = NULL;
tmp->result = DID_ABORT << 16;
tmp->scsi_done(tmp);
return SUCCESS;
}
}
/*
* Case 5 : If we reached this point, the command was not found in any of
* the queues.
*
* We probably reached this point because of an unlikely race condition
* between the command completing successfully and the abortion code,
* so we won't panic, but we will notify the user in case something really
* broke.
*/
printk(KERN_WARNING "scsi%d : warning : SCSI command probably completed successfully\n"
" before abortion\n", instance->host_no);
return FAILED;
return result;
}
/*
* Function : int NCR5380_bus_reset (struct scsi_cmnd *cmd)
*
* Purpose : reset the SCSI bus.
*
* Returns : SUCCESS
/**
* NCR5380_bus_reset - reset the SCSI bus
* @cmd: SCSI command undergoing EH
*
* Locks: host lock taken by caller
* Returns SUCCESS
*/
static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
{
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int i;
unsigned long flags;
struct NCR5380_cmd *ncmd;
NCR5380_local_declare();
NCR5380_setup(instance);
NCR5380_print_status(instance);
spin_lock_irqsave(&hostdata->lock, flags);
#if (NDEBUG & NDEBUG_ANY)
scmd_printk(KERN_INFO, cmd, __func__);
#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
spin_lock_irq(instance->host_lock);
do_reset(instance);
spin_unlock_irq(instance->host_lock);
/* reset NCR registers */
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(TARGET_COMMAND_REG, 0);
NCR5380_write(SELECT_ENABLE_REG, 0);
/* After the reset, there are no more connected or disconnected commands
* and no busy units; so clear the low-level status here to avoid
* conflicts when the mid-level code tries to wake up the affected
* commands!
*/
hostdata->selecting = NULL;
list_for_each_entry(ncmd, &hostdata->disconnected, list) {
struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
set_host_byte(cmd, DID_RESET);
cmd->scsi_done(cmd);
}
list_for_each_entry(ncmd, &hostdata->autosense, list) {
struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
set_host_byte(cmd, DID_RESET);
cmd->scsi_done(cmd);
}
if (hostdata->connected) {
set_host_byte(hostdata->connected, DID_RESET);
complete_cmd(instance, hostdata->connected);
hostdata->connected = NULL;
}
if (hostdata->sensing) {
set_host_byte(hostdata->connected, DID_RESET);
complete_cmd(instance, hostdata->sensing);
hostdata->sensing = NULL;
}
for (i = 0; i < 8; ++i)
hostdata->busy[i] = 0;
#ifdef REAL_DMA
hostdata->dma_len = 0;
#endif
queue_work(hostdata->work_q, &hostdata->main_task);
spin_unlock_irqrestore(&hostdata->lock, flags);
return SUCCESS;
}
drivers/scsi/NCR5380.h
浏览文件 @ 60539fa3
......@@ -22,8 +22,13 @@
#ifndef NCR5380_H
#define NCR5380_H
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/workqueue.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_transport_spi.h>
#define NDEBUG_ARBITRATION 0x1
#define NDEBUG_AUTOSENSE 0x2
......@@ -158,8 +163,7 @@
/* Write any value to this register to start an ini mode DMA receive */
#define START_DMA_INITIATOR_RECEIVE_REG 7 /* wo */
#define C400_CONTROL_STATUS_REG NCR53C400_register_offset-8 /* rw */
/* NCR 53C400(A) Control Status Register bits: */
#define CSR_RESET 0x80 /* wo Resets 53c400 */
#define CSR_53C80_REG 0x80 /* ro 5380 registers busy */
#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
......@@ -176,16 +180,6 @@
#define CSR_BASE CSR_53C80_INTR
#endif
/* Number of 128-byte blocks to be transferred */
#define C400_BLOCK_COUNTER_REG NCR53C400_register_offset-7 /* rw */
/* Resume transfer after disconnect */
#define C400_RESUME_TRANSFER_REG NCR53C400_register_offset-6 /* wo */
/* Access to host buffer stack */
#define C400_HOST_BUFFER NCR53C400_register_offset-4 /* rw */
/* Note : PHASE_* macros are based on the values of the STATUS register */
#define PHASE_MASK (SR_MSG | SR_CD | SR_IO)
......@@ -205,16 +199,6 @@
#define PHASE_SR_TO_TCR(phase) ((phase) >> 2)
/*
* The internal should_disconnect() function returns these based on the
* expected length of a disconnect if a device supports disconnect/
* reconnect.
*/
#define DISCONNECT_NONE 0
#define DISCONNECT_TIME_TO_DATA 1
#define DISCONNECT_LONG 2
/*
* "Special" value for the (unsigned char) command tag, to indicate
* I_T_L nexus instead of I_T_L_Q.
......@@ -236,15 +220,11 @@
#define NO_IRQ 0
#endif
#define FLAG_HAS_LAST_BYTE_SENT 1 /* NCR53c81 or better */
#define FLAG_CHECK_LAST_BYTE_SENT 2 /* Only test once */
#define FLAG_NCR53C400 4 /* NCR53c400 */
#define FLAG_NO_DMA_FIXUP 1 /* No DMA errata workarounds */
#define FLAG_NO_PSEUDO_DMA 8 /* Inhibit DMA */
#define FLAG_DTC3181E 16 /* DTC3181E */
#define FLAG_LATE_DMA_SETUP 32 /* Setup NCR before DMA H/W */
#define FLAG_TAGGED_QUEUING 64 /* as X3T9.2 spelled it */
#ifndef ASM
#define FLAG_TOSHIBA_DELAY 128 /* Allow for borken CD-ROMs */
#ifdef SUPPORT_TAGS
struct tag_alloc {
......@@ -258,33 +238,24 @@ struct NCR5380_hostdata {
NCR5380_implementation_fields; /* implementation specific */
struct Scsi_Host *host; /* Host backpointer */
unsigned char id_mask, id_higher_mask; /* 1 << id, all bits greater */
unsigned char targets_present; /* targets we have connected
to, so we can call a select
failure a retryable condition */
volatile unsigned char busy[8]; /* index = target, bit = lun */
unsigned char busy[8]; /* index = target, bit = lun */
#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
volatile int dma_len; /* requested length of DMA */
int dma_len; /* requested length of DMA */
#endif
volatile unsigned char last_message; /* last message OUT */
volatile struct scsi_cmnd *connected; /* currently connected command */
volatile struct scsi_cmnd *issue_queue; /* waiting to be issued */
volatile struct scsi_cmnd *disconnected_queue; /* waiting for reconnect */
volatile int restart_select; /* we have disconnected,
used to restart
NCR5380_select() */
volatile unsigned aborted:1; /* flag, says aborted */
unsigned char last_message; /* last message OUT */
struct scsi_cmnd *connected; /* currently connected cmnd */
struct scsi_cmnd *selecting; /* cmnd to be connected */
struct list_head unissued; /* waiting to be issued */
struct list_head autosense; /* priority issue queue */
struct list_head disconnected; /* waiting for reconnect */
spinlock_t lock; /* protects this struct */
int flags;
unsigned long time_expires; /* in jiffies, set prior to sleeping */
int select_time; /* timer in select for target response */
volatile struct scsi_cmnd *selecting;
struct delayed_work coroutine; /* our co-routine */
struct scsi_eh_save ses;
struct scsi_cmnd *sensing;
char info[256];
int read_overruns; /* number of bytes to cut from a
* transfer to handle chip overruns */
int retain_dma_intr;
struct work_struct main_task;
volatile int main_running;
#ifdef SUPPORT_TAGS
struct tag_alloc TagAlloc[8][8]; /* 8 targets and 8 LUNs */
#endif
......@@ -292,10 +263,23 @@ struct NCR5380_hostdata {
unsigned spin_max_r;
unsigned spin_max_w;
#endif
struct workqueue_struct *work_q;
unsigned long accesses_per_ms; /* chip register accesses per ms */
};
#ifdef __KERNEL__
struct NCR5380_cmd {
struct list_head list;
};
#define NCR5380_CMD_SIZE (sizeof(struct NCR5380_cmd))
static inline struct scsi_cmnd *NCR5380_to_scmd(struct NCR5380_cmd *ncmd_ptr)
{
return ((struct scsi_cmnd *)ncmd_ptr) - 1;
}
#ifndef NDEBUG
#define NDEBUG (0)
#endif
......@@ -304,6 +288,11 @@ struct NCR5380_hostdata {
do { if ((NDEBUG) & (flg)) \
printk(KERN_DEBUG fmt, ## __VA_ARGS__); } while (0)
#define dsprintk(flg, host, fmt, ...) \
do { if ((NDEBUG) & (flg)) \
shost_printk(KERN_DEBUG, host, fmt, ## __VA_ARGS__); \
} while (0)
#if NDEBUG
#define NCR5380_dprint(flg, arg) \
do { if ((NDEBUG) & (flg)) NCR5380_print(arg); } while (0)
......@@ -320,6 +309,7 @@ static void NCR5380_print(struct Scsi_Host *instance);
static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible);
#endif
static int NCR5380_init(struct Scsi_Host *instance, int flags);
static int NCR5380_maybe_reset_bus(struct Scsi_Host *);
static void NCR5380_exit(struct Scsi_Host *instance);
static void NCR5380_information_transfer(struct Scsi_Host *instance);
#ifndef DONT_USE_INTR
......@@ -328,7 +318,7 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id);
static void NCR5380_main(struct work_struct *work);
static const char *NCR5380_info(struct Scsi_Host *instance);
static void NCR5380_reselect(struct Scsi_Host *instance);
static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd);
static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *, struct scsi_cmnd *);
#if defined(PSEUDO_DMA) || defined(REAL_DMA) || defined(REAL_DMA_POLL)
static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data);
#endif
......@@ -443,5 +433,4 @@ static __inline__ int NCR5380_pc_dma_residual(struct Scsi_Host *instance)
#endif /* defined(i386) || defined(__alpha__) */
#endif /* defined(REAL_DMA) */
#endif /* __KERNEL__ */
#endif /* ndef ASM */
#endif /* NCR5380_H */
drivers/scsi/arm/cumana_1.c
浏览文件 @ 60539fa3
......@@ -4,9 +4,7 @@
* Copyright 1995-2002, Russell King
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/init.h>
......@@ -15,15 +13,14 @@
#include <scsi/scsi_host.h>
#include <scsi/scsicam.h>
#define PSEUDO_DMA
#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
#define NCR5380_local_declare() struct Scsi_Host *_instance
#define NCR5380_setup(instance) _instance = instance
#define NCR5380_read(reg) cumanascsi_read(_instance, reg)
#define NCR5380_write(reg, value) cumanascsi_write(_instance, reg, value)
#define NCR5380_read(reg) cumanascsi_read(instance, reg)
#define NCR5380_write(reg, value) cumanascsi_write(instance, reg, value)
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr cumanascsi_intr
#define NCR5380_queue_command cumanascsi_queue_command
#define NCR5380_info cumanascsi_info
......@@ -211,6 +208,8 @@ static struct scsi_host_template cumanascsi_template = {
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "CumanaSCSI-1",
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
static int cumanascsi1_probe(struct expansion_card *ec,
......@@ -240,23 +239,21 @@ static int cumanascsi1_probe(struct expansion_card *ec,
host->irq = ec->irq;
NCR5380_init(host, 0);
ret = NCR5380_init(host, 0);
if (ret)
goto out_unmap;
NCR5380_maybe_reset_bus(host);
priv(host)->ctrl = 0;
writeb(0, priv(host)->base + CTRL);
host->n_io_port = 255;
if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
ret = -EBUSY;
goto out_unmap;
}
ret = request_irq(host->irq, cumanascsi_intr, 0,
"CumanaSCSI-1", host);
if (ret) {
printk("scsi%d: IRQ%d not free: %d\n",
host->host_no, host->irq, ret);
goto out_unmap;
goto out_exit;
}
ret = scsi_add_host(host, &ec->dev);
......@@ -268,6 +265,8 @@ static int cumanascsi1_probe(struct expansion_card *ec,
out_free_irq:
free_irq(host->irq, host);
out_exit:
NCR5380_exit(host);
out_unmap:
iounmap(priv(host)->base);
iounmap(priv(host)->dma);
......
drivers/scsi/arm/oak.c
浏览文件 @ 60539fa3
......@@ -5,9 +5,7 @@
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/init.h>
......@@ -20,14 +18,16 @@
#define DONT_USE_INTR
#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
#define NCR5380_local_declare() void __iomem *_base
#define NCR5380_setup(host) _base = priv(host)->base
#define NCR5380_read(reg) readb(_base + ((reg) << 2))
#define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2))
#define NCR5380_read(reg) \
readb(priv(instance)->base + ((reg) << 2))
#define NCR5380_write(reg, value) \
writeb(value, priv(instance)->base + ((reg) << 2))
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_queue_command oakscsi_queue_command
#define NCR5380_info oakscsi_info
#define NCR5380_show_info oakscsi_show_info
#define NCR5380_implementation_fields \
void __iomem *base
......@@ -103,7 +103,6 @@ printk("reading %p len %d\n", addr, len);
static struct scsi_host_template oakscsi_template = {
.module = THIS_MODULE,
.show_info = oakscsi_show_info,
.name = "Oak 16-bit SCSI",
.info = oakscsi_info,
.queuecommand = oakscsi_queue_command,
......@@ -115,6 +114,8 @@ static struct scsi_host_template oakscsi_template = {
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "oakscsi",
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
......@@ -142,15 +143,21 @@ static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
host->irq = NO_IRQ;
host->n_io_port = 255;
NCR5380_init(host, 0);
ret = NCR5380_init(host, 0);
if (ret)
goto out_unmap;
NCR5380_maybe_reset_bus(host);
ret = scsi_add_host(host, &ec->dev);
if (ret)
goto out_unmap;
goto out_exit;
scsi_scan_host(host);
goto out;
out_exit:
NCR5380_exit(host);
out_unmap:
iounmap(priv(host)->base);
unreg:
......
drivers/scsi/atari_NCR5380.c
浏览文件 @ 60539fa3
......@@ -24,84 +24,10 @@
* 1+ (800) 334-5454
*/
/*
* ++roman: To port the 5380 driver to the Atari, I had to do some changes in
* this file, too:
*
* - Some of the debug statements were incorrect (undefined variables and the
* like). I fixed that.
*
* - In information_transfer(), I think a #ifdef was wrong. Looking at the
* possible DMA transfer size should also happen for REAL_DMA. I added this
* in the #if statement.
*
* - When using real DMA, information_transfer() should return in a DATAOUT
* phase after starting the DMA. It has nothing more to do.
*
* - The interrupt service routine should run main after end of DMA, too (not
* only after RESELECTION interrupts). Additionally, it should _not_ test
* for more interrupts after running main, since a DMA process may have
* been started and interrupts are turned on now. The new int could happen
* inside the execution of NCR5380_intr(), leading to recursive
* calls.
*
* - I've added a function merge_contiguous_buffers() that tries to
* merge scatter-gather buffers that are located at contiguous
* physical addresses and can be processed with the same DMA setup.
* Since most scatter-gather operations work on a page (4K) of
* 4 buffers (1K), in more than 90% of all cases three interrupts and
* DMA setup actions are saved.
*
* - I've deleted all the stuff for AUTOPROBE_IRQ, REAL_DMA_POLL, PSEUDO_DMA
* and USLEEP, because these were messing up readability and will never be
* needed for Atari SCSI.
*
* - I've revised the NCR5380_main() calling scheme (relax the 'main_running'
* stuff), and 'main' is executed in a bottom half if awoken by an
* interrupt.
*
* - The code was quite cluttered up by "#if (NDEBUG & NDEBUG_*) printk..."
* constructs. In my eyes, this made the source rather unreadable, so I
* finally replaced that by the *_PRINTK() macros.
*
*/
/*
* Further development / testing that should be done :
* 1. Test linked command handling code after Eric is ready with
* the high level code.
*/
/* Ported to Atari by Roman Hodek and others. */
/* Adapted for the sun3 by Sam Creasey. */
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_transport_spi.h>
#if (NDEBUG & NDEBUG_LISTS)
#define LIST(x, y) \
do { \
printk("LINE:%d Adding %p to %p\n", \
__LINE__, (void*)(x), (void*)(y)); \
if ((x) == (y)) \
udelay(5); \
} while (0)
#define REMOVE(w, x, y, z) \
do { \
printk("LINE:%d Removing: %p->%p %p->%p \n", \
__LINE__, (void*)(w), (void*)(x), \
(void*)(y), (void*)(z)); \
if ((x) == (y)) \
udelay(5); \
} while (0)
#else
#define LIST(x,y)
#define REMOVE(w,x,y,z)
#endif
#ifndef notyet
#undef LINKED
#endif
/*
* Design
*
......@@ -126,17 +52,7 @@
* piece of hardware that requires you to sit in a loop polling for
* the REQ signal as long as you are connected. Some devices are
* brain dead (ie, many TEXEL CD ROM drives) and won't disconnect
* while doing long seek operations.
*
* The workaround for this is to keep track of devices that have
* disconnected. If the device hasn't disconnected, for commands that
* should disconnect, we do something like
*
* while (!REQ is asserted) { sleep for N usecs; poll for M usecs }
*
* Some tweaking of N and M needs to be done. An algorithm based
* on "time to data" would give the best results as long as short time
* to datas (ie, on the same track) were considered, however these
* while doing long seek operations. [...] These
* broken devices are the exception rather than the rule and I'd rather
* spend my time optimizing for the normal case.
*
......@@ -182,8 +98,6 @@
* DIFFERENTIAL - if defined, NCR53c81 chips will use external differential
* transceivers.
*
* LINKED - if defined, linked commands are supported.
*
* REAL_DMA - if defined, REAL DMA is used during the data transfer phases.
*
* SUPPORT_TAGS - if defined, SCSI-2 tagged queuing is used where possible
......@@ -221,18 +135,8 @@
* possible) function may be used.
*/
/* Macros ease life... :-) */
#define SETUP_HOSTDATA(in) \
struct NCR5380_hostdata *hostdata = \
(struct NCR5380_hostdata *)(in)->hostdata
#define HOSTDATA(in) ((struct NCR5380_hostdata *)(in)->hostdata)
#define NEXT(cmd) ((struct scsi_cmnd *)(cmd)->host_scribble)
#define SET_NEXT(cmd,next) ((cmd)->host_scribble = (void *)(next))
#define NEXTADDR(cmd) ((struct scsi_cmnd **)&(cmd)->host_scribble)
#define HOSTNO instance->host_no
#define H_NO(cmd) (cmd)->device->host->host_no
static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
#ifdef SUPPORT_TAGS
......@@ -251,9 +155,7 @@
* cannot know it in advance :-( We just see a QUEUE_FULL status being
* returned. So, in this case, the driver internal queue size assumption is
* reduced to the number of active tags if QUEUE_FULL is returned by the
* target. The command is returned to the mid-level, but with status changed
* to BUSY, since --as I've seen-- the mid-level can't handle QUEUE_FULL
* correctly.
* target.
*
* We're also not allowed running tagged commands as long as an untagged
* command is active. And REQUEST SENSE commands after a contingent allegiance
......@@ -304,7 +206,8 @@ static void __init init_tags(struct NCR5380_hostdata *hostdata)
static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged)
{
u8 lun = cmd->device->lun;
SETUP_HOSTDATA(cmd->device->host);
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
if (hostdata->busy[cmd->device->id] & (1 << lun))
return 1;
......@@ -314,8 +217,8 @@ static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged)
return 0;
if (hostdata->TagAlloc[scmd_id(cmd)][lun].nr_allocated >=
hostdata->TagAlloc[scmd_id(cmd)][lun].queue_size) {
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d: no free tags\n",
H_NO(cmd), cmd->device->id, lun);
dsprintk(NDEBUG_TAGS, instance, "target %d lun %d: no free tags\n",
scmd_id(cmd), lun);
return 1;
}
return 0;
......@@ -330,7 +233,8 @@ static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged)
static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged)
{
u8 lun = cmd->device->lun;
SETUP_HOSTDATA(cmd->device->host);
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
/* If we or the target don't support tagged queuing, allocate the LUN for
* an untagged command.
......@@ -340,18 +244,16 @@ static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged)
!cmd->device->tagged_supported) {
cmd->tag = TAG_NONE;
hostdata->busy[cmd->device->id] |= (1 << lun);
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d now allocated by untagged "
"command\n", H_NO(cmd), cmd->device->id, lun);
dsprintk(NDEBUG_TAGS, instance, "target %d lun %d now allocated by untagged command\n",
scmd_id(cmd), lun);
} else {
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun];
cmd->tag = find_first_zero_bit(ta->allocated, MAX_TAGS);
set_bit(cmd->tag, ta->allocated);
ta->nr_allocated++;
dprintk(NDEBUG_TAGS, "scsi%d: using tag %d for target %d lun %d "
"(now %d tags in use)\n",
H_NO(cmd), cmd->tag, cmd->device->id,
lun, ta->nr_allocated);
dsprintk(NDEBUG_TAGS, instance, "using tag %d for target %d lun %d (%d tags allocated)\n",
cmd->tag, scmd_id(cmd), lun, ta->nr_allocated);
}
}
......@@ -363,21 +265,22 @@ static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged)
static void cmd_free_tag(struct scsi_cmnd *cmd)
{
u8 lun = cmd->device->lun;
SETUP_HOSTDATA(cmd->device->host);
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
if (cmd->tag == TAG_NONE) {
hostdata->busy[cmd->device->id] &= ~(1 << lun);
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d untagged cmd finished\n",
H_NO(cmd), cmd->device->id, lun);
dsprintk(NDEBUG_TAGS, instance, "target %d lun %d untagged cmd freed\n",
scmd_id(cmd), lun);
} else if (cmd->tag >= MAX_TAGS) {
printk(KERN_NOTICE "scsi%d: trying to free bad tag %d!\n",
H_NO(cmd), cmd->tag);
shost_printk(KERN_NOTICE, instance,
"trying to free bad tag %d!\n", cmd->tag);
} else {
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun];
clear_bit(cmd->tag, ta->allocated);
ta->nr_allocated--;
dprintk(NDEBUG_TAGS, "scsi%d: freed tag %d for target %d lun %d\n",
H_NO(cmd), cmd->tag, cmd->device->id, lun);
dsprintk(NDEBUG_TAGS, instance, "freed tag %d for target %d lun %d\n",
cmd->tag, scmd_id(cmd), lun);
}
}
......@@ -401,17 +304,15 @@ static void free_all_tags(struct NCR5380_hostdata *hostdata)
#endif /* SUPPORT_TAGS */
/*
* Function: void merge_contiguous_buffers( struct scsi_cmnd *cmd )
*
* Purpose: Try to merge several scatter-gather requests into one DMA
* transfer. This is possible if the scatter buffers lie on
* physical contiguous addresses.
/**
* merge_contiguous_buffers - coalesce scatter-gather list entries
* @cmd: command requesting IO
*
* Parameters: struct scsi_cmnd *cmd
* The command to work on. The first scatter buffer's data are
* assumed to be already transferred into ptr/this_residual.
* Try to merge several scatter-gather buffers into one DMA transfer.
* This is possible if the scatter buffers lie on physically
* contiguous addresses. The first scatter-gather buffer's data are
* assumed to be already transferred into cmd->SCp.this_residual.
* Every buffer merged avoids an interrupt and a DMA setup operation.
*/
static void merge_contiguous_buffers(struct scsi_cmnd *cmd)
......@@ -463,9 +364,7 @@ static inline void initialize_SCp(struct scsi_cmnd *cmd)
cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
cmd->SCp.this_residual = cmd->SCp.buffer->length;
/* ++roman: Try to merge some scatter-buffers if they are at
* contiguous physical addresses.
*/
merge_contiguous_buffers(cmd);
} else {
cmd->SCp.buffer = NULL;
......@@ -473,31 +372,110 @@ static inline void initialize_SCp(struct scsi_cmnd *cmd)
cmd->SCp.ptr = NULL;
cmd->SCp.this_residual = 0;
}
cmd->SCp.Status = 0;
cmd->SCp.Message = 0;
}
/**
* NCR5380_poll_politely2 - wait for two chip register values
* @instance: controller to poll
* @reg1: 5380 register to poll
* @bit1: Bitmask to check
* @val1: Expected value
* @reg2: Second 5380 register to poll
* @bit2: Second bitmask to check
* @val2: Second expected value
* @wait: Time-out in jiffies
*
* Polls the chip in a reasonably efficient manner waiting for an
* event to occur. After a short quick poll we begin to yield the CPU
* (if possible). In irq contexts the time-out is arbitrarily limited.
* Callers may hold locks as long as they are held in irq mode.
*
* Returns 0 if either or both event(s) occurred otherwise -ETIMEDOUT.
*/
static int NCR5380_poll_politely2(struct Scsi_Host *instance,
int reg1, int bit1, int val1,
int reg2, int bit2, int val2, int wait)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned long deadline = jiffies + wait;
unsigned long n;
/* Busy-wait for up to 10 ms */
n = min(10000U, jiffies_to_usecs(wait));
n *= hostdata->accesses_per_ms;
n /= 2000;
do {
if ((NCR5380_read(reg1) & bit1) == val1)
return 0;
if ((NCR5380_read(reg2) & bit2) == val2)
return 0;
cpu_relax();
} while (n--);
if (irqs_disabled() || in_interrupt())
return -ETIMEDOUT;
/* Repeatedly sleep for 1 ms until deadline */
while (time_is_after_jiffies(deadline)) {
schedule_timeout_uninterruptible(1);
if ((NCR5380_read(reg1) & bit1) == val1)
return 0;
if ((NCR5380_read(reg2) & bit2) == val2)
return 0;
}
return -ETIMEDOUT;
}
#include <linux/delay.h>
static inline int NCR5380_poll_politely(struct Scsi_Host *instance,
int reg, int bit, int val, int wait)
{
return NCR5380_poll_politely2(instance, reg, bit, val,
reg, bit, val, wait);
}
#if NDEBUG
static struct {
unsigned char mask;
const char *name;
} signals[] = {
{ SR_DBP, "PARITY"}, { SR_RST, "RST" }, { SR_BSY, "BSY" },
{ SR_REQ, "REQ" }, { SR_MSG, "MSG" }, { SR_CD, "CD" }, { SR_IO, "IO" },
{ SR_SEL, "SEL" }, {0, NULL}
}, basrs[] = {
{BASR_ATN, "ATN"}, {BASR_ACK, "ACK"}, {0, NULL}
}, icrs[] = {
{ICR_ASSERT_RST, "ASSERT RST"},{ICR_ASSERT_ACK, "ASSERT ACK"},
{ICR_ASSERT_BSY, "ASSERT BSY"}, {ICR_ASSERT_SEL, "ASSERT SEL"},
{ICR_ASSERT_ATN, "ASSERT ATN"}, {ICR_ASSERT_DATA, "ASSERT DATA"},
{SR_DBP, "PARITY"},
{SR_RST, "RST"},
{SR_BSY, "BSY"},
{SR_REQ, "REQ"},
{SR_MSG, "MSG"},
{SR_CD, "CD"},
{SR_IO, "IO"},
{SR_SEL, "SEL"},
{0, NULL}
},
basrs[] = {
{BASR_ATN, "ATN"},
{BASR_ACK, "ACK"},
{0, NULL}
}, mrs[] = {
{MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, {MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, {MR_ENABLE_PAR_INTR,
"MODE PARITY INTR"}, {MR_ENABLE_EOP_INTR,"MODE EOP INTR"},
},
icrs[] = {
{ICR_ASSERT_RST, "ASSERT RST"},
{ICR_ASSERT_ACK, "ASSERT ACK"},
{ICR_ASSERT_BSY, "ASSERT BSY"},
{ICR_ASSERT_SEL, "ASSERT SEL"},
{ICR_ASSERT_ATN, "ASSERT ATN"},
{ICR_ASSERT_DATA, "ASSERT DATA"},
{0, NULL}
},
mrs[] = {
{MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
{MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
{MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
{MR_ENABLE_EOP_INTR, "MODE EOP INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
{MR_DMA_MODE, "MODE DMA"}, {MR_ARBITRATE, "MODE ARBITRATION"},
{MR_DMA_MODE, "MODE DMA"},
{MR_ARBITRATE, "MODE ARBITRATION"},
{0, NULL}
};
......@@ -511,15 +489,13 @@ static struct {
static void NCR5380_print(struct Scsi_Host *instance)
{
unsigned char status, data, basr, mr, icr, i;
unsigned long flags;
local_irq_save(flags);
data = NCR5380_read(CURRENT_SCSI_DATA_REG);
status = NCR5380_read(STATUS_REG);
mr = NCR5380_read(MODE_REG);
icr = NCR5380_read(INITIATOR_COMMAND_REG);
basr = NCR5380_read(BUS_AND_STATUS_REG);
local_irq_restore(flags);
printk("STATUS_REG: %02x ", status);
for (i = 0; signals[i].mask; ++i)
if (status & signals[i].mask)
......@@ -543,8 +519,12 @@ static struct {
unsigned char value;
const char *name;
} phases[] = {
{PHASE_DATAOUT, "DATAOUT"}, {PHASE_DATAIN, "DATAIN"}, {PHASE_CMDOUT, "CMDOUT"},
{PHASE_STATIN, "STATIN"}, {PHASE_MSGOUT, "MSGOUT"}, {PHASE_MSGIN, "MSGIN"},
{PHASE_DATAOUT, "DATAOUT"},
{PHASE_DATAIN, "DATAIN"},
{PHASE_CMDOUT, "CMDOUT"},
{PHASE_STATIN, "STATIN"},
{PHASE_MSGOUT, "MSGOUT"},
{PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
......@@ -553,8 +533,6 @@ static struct {
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
*
* Locks: none
*/
static void NCR5380_print_phase(struct Scsi_Host *instance)
......@@ -564,54 +542,21 @@ static void NCR5380_print_phase(struct Scsi_Host *instance)
status = NCR5380_read(STATUS_REG);
if (!(status & SR_REQ))
printk(KERN_DEBUG "scsi%d: REQ not asserted, phase unknown.\n", HOSTNO);
shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n");
else {
for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
(phases[i].value != (status & PHASE_MASK)); ++i)
;
printk(KERN_DEBUG "scsi%d: phase %s\n", HOSTNO, phases[i].name);
shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name);
}
}
#endif
/*
* ++roman: New scheme of calling NCR5380_main()
*
* If we're not in an interrupt, we can call our main directly, it cannot be
* already running. Else, we queue it on a task queue, if not 'main_running'
* tells us that a lower level is already executing it. This way,
* 'main_running' needs not be protected in a special way.
*
* queue_main() is a utility function for putting our main onto the task
* queue, if main_running is false. It should be called only from a
* interrupt or bottom half.
*/
#include <linux/gfp.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
static inline void queue_main(struct NCR5380_hostdata *hostdata)
{
if (!hostdata->main_running) {
/* If in interrupt and NCR5380_main() not already running,
queue it on the 'immediate' task queue, to be processed
immediately after the current interrupt processing has
finished. */
schedule_work(&hostdata->main_task);
}
/* else: nothing to do: the running NCR5380_main() will pick up
any newly queued command. */
}
/**
* NCR58380_info - report driver and host information
* @instance: relevant scsi host instance
*
* For use as the host template info() handler.
*
* Locks: none
*/
static const char *NCR5380_info(struct Scsi_Host *instance)
......@@ -630,13 +575,14 @@ static void prepare_info(struct Scsi_Host *instance)
"base 0x%lx, irq %d, "
"can_queue %d, cmd_per_lun %d, "
"sg_tablesize %d, this_id %d, "
"flags { %s}, "
"flags { %s%s}, "
"options { %s} ",
instance->hostt->name, instance->io_port, instance->n_io_port,
instance->base, instance->irq,
instance->can_queue, instance->cmd_per_lun,
instance->sg_tablesize, instance->this_id,
hostdata->flags & FLAG_TAGGED_QUEUING ? "TAGGED_QUEUING " : "",
hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "",
#ifdef DIFFERENTIAL
"DIFFERENTIAL "
#endif
......@@ -652,102 +598,6 @@ static void prepare_info(struct Scsi_Host *instance)
"");
}
/**
* NCR5380_print_status - dump controller info
* @instance: controller to dump
*
* Print commands in the various queues, called from NCR5380_abort
* to aid debugging.
*/
static void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd)
{
int i, s;
unsigned char *command;
printk("scsi%d: destination target %d, lun %llu\n",
H_NO(cmd), cmd->device->id, cmd->device->lun);
printk(KERN_CONT " command = ");
command = cmd->cmnd;
printk(KERN_CONT "%2d (0x%02x)", command[0], command[0]);
for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
printk(KERN_CONT " %02x", command[i]);
printk("\n");
}
static void NCR5380_print_status(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata;
struct scsi_cmnd *ptr;
unsigned long flags;
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
hostdata = (struct NCR5380_hostdata *)instance->hostdata;
local_irq_save(flags);
printk("NCR5380: coroutine is%s running.\n",
hostdata->main_running ? "" : "n't");
if (!hostdata->connected)
printk("scsi%d: no currently connected command\n", HOSTNO);
else
lprint_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected);
printk("scsi%d: issue_queue\n", HOSTNO);
for (ptr = (struct scsi_cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr))
lprint_Scsi_Cmnd(ptr);
printk("scsi%d: disconnected_queue\n", HOSTNO);
for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr;
ptr = NEXT(ptr))
lprint_Scsi_Cmnd(ptr);
local_irq_restore(flags);
printk("\n");
}
static void show_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m)
{
int i, s;
unsigned char *command;
seq_printf(m, "scsi%d: destination target %d, lun %llu\n",
H_NO(cmd), cmd->device->id, cmd->device->lun);
seq_puts(m, " command = ");
command = cmd->cmnd;
seq_printf(m, "%2d (0x%02x)", command[0], command[0]);
for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
seq_printf(m, " %02x", command[i]);
seq_putc(m, '\n');
}
static int __maybe_unused NCR5380_show_info(struct seq_file *m,
struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata;
struct scsi_cmnd *ptr;
unsigned long flags;
hostdata = (struct NCR5380_hostdata *)instance->hostdata;
local_irq_save(flags);
seq_printf(m, "NCR5380: coroutine is%s running.\n",
hostdata->main_running ? "" : "n't");
if (!hostdata->connected)
seq_printf(m, "scsi%d: no currently connected command\n", HOSTNO);
else
show_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected, m);
seq_printf(m, "scsi%d: issue_queue\n", HOSTNO);
for (ptr = (struct scsi_cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr))
show_Scsi_Cmnd(ptr, m);
seq_printf(m, "scsi%d: disconnected_queue\n", HOSTNO);
for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr;
ptr = NEXT(ptr))
show_Scsi_Cmnd(ptr, m);
local_irq_restore(flags);
return 0;
}
/**
* NCR5380_init - initialise an NCR5380
* @instance: adapter to configure
......@@ -764,11 +614,11 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int i;
SETUP_HOSTDATA(instance);
unsigned long deadline;
hostdata->host = instance;
hostdata->aborted = 0;
hostdata->id_mask = 1 << instance->this_id;
hostdata->id_higher_mask = 0;
for (i = hostdata->id_mask; i <= 0x80; i <<= 1)
......@@ -782,13 +632,21 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
#if defined (REAL_DMA)
hostdata->dma_len = 0;
#endif
hostdata->targets_present = 0;
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
hostdata->sensing = NULL;
INIT_LIST_HEAD(&hostdata->autosense);
INIT_LIST_HEAD(&hostdata->unissued);
INIT_LIST_HEAD(&hostdata->disconnected);
hostdata->flags = flags;
INIT_WORK(&hostdata->main_task, NCR5380_main);
hostdata->work_q = alloc_workqueue("ncr5380_%d",
WQ_UNBOUND | WQ_MEM_RECLAIM,
1, instance->host_no);
if (!hostdata->work_q)
return -ENOMEM;
prepare_info(instance);
......@@ -797,6 +655,72 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
NCR5380_write(TARGET_COMMAND_REG, 0);
NCR5380_write(SELECT_ENABLE_REG, 0);
/* Calibrate register polling loop */
i = 0;
deadline = jiffies + 1;
do {
cpu_relax();
} while (time_is_after_jiffies(deadline));
deadline += msecs_to_jiffies(256);
do {
NCR5380_read(STATUS_REG);
++i;
cpu_relax();
} while (time_is_after_jiffies(deadline));
hostdata->accesses_per_ms = i / 256;
return 0;
}
/**
* NCR5380_maybe_reset_bus - Detect and correct bus wedge problems.
* @instance: adapter to check
*
* If the system crashed, it may have crashed with a connected target and
* the SCSI bus busy. Check for BUS FREE phase. If not, try to abort the
* currently established nexus, which we know nothing about. Failing that
* do a bus reset.
*
* Note that a bus reset will cause the chip to assert IRQ.
*
* Returns 0 if successful, otherwise -ENXIO.
*/
static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int pass;
for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) {
switch (pass) {
case 1:
case 3:
case 5:
shost_printk(KERN_ERR, instance, "SCSI bus busy, waiting up to five seconds\n");
NCR5380_poll_politely(instance,
STATUS_REG, SR_BSY, 0, 5 * HZ);
break;
case 2:
shost_printk(KERN_ERR, instance, "bus busy, attempting abort\n");
do_abort(instance);
break;
case 4:
shost_printk(KERN_ERR, instance, "bus busy, attempting reset\n");
do_reset(instance);
/* Wait after a reset; the SCSI standard calls for
* 250ms, we wait 500ms to be on the safe side.
* But some Toshiba CD-ROMs need ten times that.
*/
if (hostdata->flags & FLAG_TOSHIBA_DELAY)
msleep(2500);
else
msleep(500);
break;
case 6:
shost_printk(KERN_ERR, instance, "bus locked solid\n");
return -ENXIO;
}
}
return 0;
}
......@@ -812,6 +736,38 @@ static void NCR5380_exit(struct Scsi_Host *instance)
struct NCR5380_hostdata *hostdata = shost_priv(instance);
cancel_work_sync(&hostdata->main_task);
destroy_workqueue(hostdata->work_q);
}
/**
* complete_cmd - finish processing a command and return it to the SCSI ML
* @instance: the host instance
* @cmd: command to complete
*/
static void complete_cmd(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd);
if (hostdata->sensing == cmd) {
/* Autosense processing ends here */
if ((cmd->result & 0xff) != SAM_STAT_GOOD) {
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
set_host_byte(cmd, DID_ERROR);
} else
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
hostdata->sensing = NULL;
}
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
#else
hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
#endif
cmd->scsi_done(cmd);
}
/**
......@@ -819,7 +775,7 @@ static void NCR5380_exit(struct Scsi_Host *instance)
* @instance: the relevant SCSI adapter
* @cmd: SCSI command
*
* cmd is added to the per instance issue_queue, with minor
* cmd is added to the per-instance issue queue, with minor
* twiddling done to the host specific fields of cmd. If the
* main coroutine is not running, it is restarted.
*/
......@@ -828,44 +784,23 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
struct scsi_cmnd *tmp;
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
unsigned long flags;
#if (NDEBUG & NDEBUG_NO_WRITE)
switch (cmd->cmnd[0]) {
case WRITE_6:
case WRITE_10:
printk(KERN_NOTICE "scsi%d: WRITE attempted with NO_WRITE debugging flag set\n",
H_NO(cmd));
shost_printk(KERN_DEBUG, instance, "WRITE attempted with NDEBUG_NO_WRITE set\n");
cmd->result = (DID_ERROR << 16);
cmd->scsi_done(cmd);
return 0;
}
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
/*
* We use the host_scribble field as a pointer to the next command
* in a queue
*/
SET_NEXT(cmd, NULL);
cmd->result = 0;
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
* commands are added to the head of the queue since any command will
* clear the contingent allegiance condition that exists and the
* sense data is only guaranteed to be valid while the condition exists.
*/
/* ++guenther: now that the issue queue is being set up, we can lock ST-DMA.
* Otherwise a running NCR5380_main may steal the lock.
* Lock before actually inserting due to fairness reasons explained in
* atari_scsi.c. If we insert first, then it's impossible for this driver
* to release the lock.
* Stop timer for this command while waiting for the lock, or timeouts
* may happen (and they really do), and it's no good if the command doesn't
* appear in any of the queues.
* ++roman: Just disabling the NCR interrupt isn't sufficient here,
* because also a timer int can trigger an abort or reset, which would
* alter queues and touch the lock.
......@@ -873,7 +808,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
if (!NCR5380_acquire_dma_irq(instance))
return SCSI_MLQUEUE_HOST_BUSY;
local_irq_save(flags);
spin_lock_irqsave(&hostdata->lock, flags);
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
......@@ -882,33 +817,18 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
* sense data is only guaranteed to be valid while the condition exists.
*/
if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
LIST(cmd, hostdata->issue_queue);
SET_NEXT(cmd, hostdata->issue_queue);
hostdata->issue_queue = cmd;
} else {
for (tmp = (struct scsi_cmnd *)hostdata->issue_queue;
NEXT(tmp); tmp = NEXT(tmp))
;
LIST(cmd, tmp);
SET_NEXT(tmp, cmd);
}
local_irq_restore(flags);
if (cmd->cmnd[0] == REQUEST_SENSE)
list_add(&ncmd->list, &hostdata->unissued);
else
list_add_tail(&ncmd->list, &hostdata->unissued);
dprintk(NDEBUG_QUEUES, "scsi%d: command added to %s of queue\n", H_NO(cmd),
(cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
spin_unlock_irqrestore(&hostdata->lock, flags);
/* If queue_command() is called from an interrupt (real one or bottom
* half), we let queue_main() do the job of taking care about main. If it
* is already running, this is a no-op, else main will be queued.
*
* If we're not in an interrupt, we can call NCR5380_main()
* unconditionally, because it cannot be already running.
*/
if (in_interrupt() || irqs_disabled())
queue_main(hostdata);
else
NCR5380_main(&hostdata->main_task);
dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
cmd, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
/* Kick off command processing */
queue_work(hostdata->work_q, &hostdata->main_task);
return 0;
}
......@@ -917,13 +837,78 @@ static inline void maybe_release_dma_irq(struct Scsi_Host *instance)
struct NCR5380_hostdata *hostdata = shost_priv(instance);
/* Caller does the locking needed to set & test these data atomically */
if (!hostdata->disconnected_queue &&
!hostdata->issue_queue &&
if (list_empty(&hostdata->disconnected) &&
list_empty(&hostdata->unissued) &&
list_empty(&hostdata->autosense) &&
!hostdata->connected &&
!hostdata->retain_dma_intr)
!hostdata->selecting)
NCR5380_release_dma_irq(instance);
}
/**
* dequeue_next_cmd - dequeue a command for processing
* @instance: the scsi host instance
*
* Priority is given to commands on the autosense queue. These commands
* need autosense because of a CHECK CONDITION result.
*
* Returns a command pointer if a command is found for a target that is
* not already busy. Otherwise returns NULL.
*/
static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
struct NCR5380_cmd *ncmd;
struct scsi_cmnd *cmd;
if (list_empty(&hostdata->autosense)) {
list_for_each_entry(ncmd, &hostdata->unissued, list) {
cmd = NCR5380_to_scmd(ncmd);
dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n",
cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun);
if (
#ifdef SUPPORT_TAGS
!is_lun_busy(cmd, 1)
#else
!(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))
#endif
) {
list_del(&ncmd->list);
dsprintk(NDEBUG_QUEUES, instance,
"dequeue: removed %p from issue queue\n", cmd);
return cmd;
}
}
} else {
/* Autosense processing begins here */
ncmd = list_first_entry(&hostdata->autosense,
struct NCR5380_cmd, list);
list_del(&ncmd->list);
cmd = NCR5380_to_scmd(ncmd);
dsprintk(NDEBUG_QUEUES, instance,
"dequeue: removed %p from autosense queue\n", cmd);
scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
hostdata->sensing = cmd;
return cmd;
}
return NULL;
}
static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
if (hostdata->sensing) {
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
list_add(&ncmd->list, &hostdata->autosense);
hostdata->sensing = NULL;
} else
list_add(&ncmd->list, &hostdata->unissued);
}
/**
* NCR5380_main - NCR state machines
*
......@@ -931,8 +916,6 @@ static inline void maybe_release_dma_irq(struct Scsi_Host *instance)
* be done on the NCR5380 host adapters in a system. Both
* NCR5380_queue_command() and NCR5380_intr() will try to start it
* in case it is not running.
*
* Locks: called as its own thread with no locks held.
*/
static void NCR5380_main(struct work_struct *work)
......@@ -940,86 +923,23 @@ static void NCR5380_main(struct work_struct *work)
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
struct scsi_cmnd *tmp, *prev;
struct scsi_cmnd *cmd;
int done;
unsigned long flags;
/*
* We run (with interrupts disabled) until we're sure that none of
* the host adapters have anything that can be done, at which point
* we set main_running to 0 and exit.
*
* Interrupts are enabled before doing various other internal
* instructions, after we've decided that we need to run through
* the loop again.
*
* this should prevent any race conditions.
*
* ++roman: Just disabling the NCR interrupt isn't sufficient here,
* because also a timer int can trigger an abort or reset, which can
* alter queues and touch the Falcon lock.
*/
/* Tell int handlers main() is now already executing. Note that
no races are possible here. If an int comes in before
'main_running' is set here, and queues/executes main via the
task queue, it doesn't do any harm, just this instance of main
won't find any work left to do. */
if (hostdata->main_running)
return;
hostdata->main_running = 1;
local_save_flags(flags);
do {
local_irq_disable(); /* Freeze request queues */
done = 1;
if (!hostdata->connected) {
dprintk(NDEBUG_MAIN, "scsi%d: not connected\n", HOSTNO);
/*
* Search through the issue_queue for a command destined
* for a target that's not busy.
*/
#if (NDEBUG & NDEBUG_LISTS)
for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL;
tmp && (tmp != prev); prev = tmp, tmp = NEXT(tmp))
;
/*printk("%p ", tmp);*/
if ((tmp == prev) && tmp)
printk(" LOOP\n");
/* else printk("\n"); */
#endif
for (tmp = (struct scsi_cmnd *) hostdata->issue_queue,
prev = NULL; tmp; prev = tmp, tmp = NEXT(tmp)) {
u8 lun = tmp->device->lun;
dprintk(NDEBUG_LISTS,
"MAIN tmp=%p target=%d busy=%d lun=%d\n",
tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)],
lun);
/* When we find one, remove it from the issue queue. */
/* ++guenther: possible race with Falcon locking */
if (
#ifdef SUPPORT_TAGS
!is_lun_busy( tmp, tmp->cmnd[0] != REQUEST_SENSE)
#else
!(hostdata->busy[tmp->device->id] & (1 << lun))
#endif
) {
/* ++guenther: just to be sure, this must be atomic */
local_irq_disable();
if (prev) {
REMOVE(prev, NEXT(prev), tmp, NEXT(tmp));
SET_NEXT(prev, NEXT(tmp));
} else {
REMOVE(-1, hostdata->issue_queue, tmp, NEXT(tmp));
hostdata->issue_queue = NEXT(tmp);
}
SET_NEXT(tmp, NULL);
hostdata->retain_dma_intr++;
spin_lock_irq(&hostdata->lock);
while (!hostdata->connected &&
(cmd = dequeue_next_cmd(instance))) {
/* reenable interrupts after finding one */
local_irq_restore(flags);
dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd);
/*
* Attempt to establish an I_T_L nexus here.
......@@ -1027,9 +947,6 @@ static void NCR5380_main(struct work_struct *work)
* On failure, we must add the command back to the
* issue queue so we can keep trying.
*/
dprintk(NDEBUG_MAIN, "scsi%d: main(): command for target %d "
"lun %d removed from issue_queue\n",
HOSTNO, tmp->device->id, lun);
/*
* REQUEST SENSE commands are issued without tagged
* queueing, even on SCSI-II devices because the
......@@ -1041,53 +958,34 @@ static void NCR5380_main(struct work_struct *work)
*/
#ifdef SUPPORT_TAGS
cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE);
cmd_get_tag(cmd, cmd->cmnd[0] != REQUEST_SENSE);
#endif
if (!NCR5380_select(instance, tmp)) {
local_irq_disable();
hostdata->retain_dma_intr--;
/* release if target did not response! */
cmd = NCR5380_select(instance, cmd);
if (!cmd) {
dsprintk(NDEBUG_MAIN, instance, "main: select complete\n");
maybe_release_dma_irq(instance);
local_irq_restore(flags);
break;
} else {
local_irq_disable();
LIST(tmp, hostdata->issue_queue);
SET_NEXT(tmp, hostdata->issue_queue);
hostdata->issue_queue = tmp;
dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance,
"main: select failed, returning %p to queue\n", cmd);
requeue_cmd(instance, cmd);
#ifdef SUPPORT_TAGS
cmd_free_tag(tmp);
cmd_free_tag(cmd);
#endif
hostdata->retain_dma_intr--;
local_irq_restore(flags);
dprintk(NDEBUG_MAIN, "scsi%d: main(): select() failed, "
"returned to issue_queue\n", HOSTNO);
if (hostdata->connected)
break;
}
} /* if target/lun/target queue is not busy */
} /* for issue_queue */
} /* if (!hostdata->connected) */
}
if (hostdata->connected
#ifdef REAL_DMA
&& !hostdata->dma_len
#endif
) {
local_irq_restore(flags);
dprintk(NDEBUG_MAIN, "scsi%d: main: performing information transfer\n",
HOSTNO);
dsprintk(NDEBUG_MAIN, instance, "main: performing information transfer\n");
NCR5380_information_transfer(instance);
dprintk(NDEBUG_MAIN, "scsi%d: main: done set false\n", HOSTNO);
done = 0;
}
spin_unlock_irq(&hostdata->lock);
if (!done)
cond_resched();
} while (!done);
/* Better allow ints _after_ 'main_running' has been cleared, else
an interrupt could believe we'll pick up the work it left for
us, but we won't see it anymore here... */
hostdata->main_running = 0;
local_irq_restore(flags);
}
......@@ -1099,24 +997,17 @@ static void NCR5380_main(struct work_struct *work)
* mismatch occurs (which would finish the DMA transfer).
*
* Inputs : instance - this instance of the NCR5380.
*
*/
static void NCR5380_dma_complete(struct Scsi_Host *instance)
{
SETUP_HOSTDATA(instance);
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int transferred;
unsigned char **data;
volatile int *count;
int *count;
int saved_data = 0, overrun = 0;
unsigned char p;
if (!hostdata->connected) {
printk(KERN_WARNING "scsi%d: received end of DMA interrupt with "
"no connected cmd\n", HOSTNO);
return;
}
if (hostdata->read_overruns) {
p = hostdata->connected->SCp.phase;
if (p & SR_IO) {
......@@ -1126,15 +1017,11 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance)
(BASR_PHASE_MATCH|BASR_ACK)) {
saved_data = NCR5380_read(INPUT_DATA_REG);
overrun = 1;
dprintk(NDEBUG_DMA, "scsi%d: read overrun handled\n", HOSTNO);
dsprintk(NDEBUG_DMA, instance, "read overrun handled\n");
}
}
}
dprintk(NDEBUG_DMA, "scsi%d: real DMA transfer complete, basr 0x%X, sr 0x%X\n",
HOSTNO, NCR5380_read(BUS_AND_STATUS_REG),
NCR5380_read(STATUS_REG));
#if defined(CONFIG_SUN3)
if ((sun3scsi_dma_finish(rq_data_dir(hostdata->connected->request)))) {
pr_err("scsi%d: overrun in UDC counter -- not prepared to deal with this!\n",
......@@ -1153,9 +1040,9 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance)
}
#endif
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
transferred = hostdata->dma_len - NCR5380_dma_residual(instance);
hostdata->dma_len = 0;
......@@ -1194,84 +1081,101 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance)
* Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses
* from the disconnected queue, and restarting NCR5380_main()
* as required.
*
* The chip can assert IRQ in any of six different conditions. The IRQ flag
* is then cleared by reading the Reset Parity/Interrupt Register (RPIR).
* Three of these six conditions are latched in the Bus and Status Register:
* - End of DMA (cleared by ending DMA Mode)
* - Parity error (cleared by reading RPIR)
* - Loss of BSY (cleared by reading RPIR)
* Two conditions have flag bits that are not latched:
* - Bus phase mismatch (non-maskable in DMA Mode, cleared by ending DMA Mode)
* - Bus reset (non-maskable)
* The remaining condition has no flag bit at all:
* - Selection/reselection
*
* Hence, establishing the cause(s) of any interrupt is partly guesswork.
* In "The DP8490 and DP5380 Comparison Guide", National Semiconductor
* claimed that "the design of the [DP8490] interrupt logic ensures
* interrupts will not be lost (they can be on the DP5380)."
* The L5380/53C80 datasheet from LOGIC Devices has more details.
*
* Checking for bus reset by reading RST is futile because of interrupt
* latency, but a bus reset will reset chip logic. Checking for parity error
* is unnecessary because that interrupt is never enabled. A Loss of BSY
* condition will clear DMA Mode. We can tell when this occurs because the
* the Busy Monitor interrupt is enabled together with DMA Mode.
*/
static irqreturn_t NCR5380_intr(int irq, void *dev_id)
{
struct Scsi_Host *instance = dev_id;
int done = 1, handled = 0;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int handled = 0;
unsigned char basr;
unsigned long flags;
dprintk(NDEBUG_INTR, "scsi%d: NCR5380 irq triggered\n", HOSTNO);
spin_lock_irqsave(&hostdata->lock, flags);
/* Look for pending interrupts */
basr = NCR5380_read(BUS_AND_STATUS_REG);
dprintk(NDEBUG_INTR, "scsi%d: BASR=%02x\n", HOSTNO, basr);
/* dispatch to appropriate routine if found and done=0 */
if (basr & BASR_IRQ) {
NCR5380_dprint(NDEBUG_INTR, instance);
if ((NCR5380_read(STATUS_REG) & (SR_SEL|SR_IO)) == (SR_SEL|SR_IO)) {
done = 0;
dprintk(NDEBUG_INTR, "scsi%d: SEL interrupt\n", HOSTNO);
NCR5380_reselect(instance);
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else if (basr & BASR_PARITY_ERROR) {
dprintk(NDEBUG_INTR, "scsi%d: PARITY interrupt\n", HOSTNO);
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) {
dprintk(NDEBUG_INTR, "scsi%d: RESET interrupt\n", HOSTNO);
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else {
/*
* The rest of the interrupt conditions can occur only during a
* DMA transfer
*/
unsigned char mr = NCR5380_read(MODE_REG);
unsigned char sr = NCR5380_read(STATUS_REG);
dsprintk(NDEBUG_INTR, instance, "IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n",
irq, basr, sr, mr);
#if defined(REAL_DMA)
/*
* We should only get PHASE MISMATCH and EOP interrupts if we have
* DMA enabled, so do a sanity check based on the current setting
* of the MODE register.
if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) {
/* Probably End of DMA, Phase Mismatch or Loss of BSY.
* We ack IRQ after clearing Mode Register. Workarounds
* for End of DMA errata need to happen in DMA Mode.
*/
if ((NCR5380_read(MODE_REG) & MR_DMA_MODE) &&
((basr & BASR_END_DMA_TRANSFER) ||
!(basr & BASR_PHASE_MATCH))) {
dsprintk(NDEBUG_INTR, instance, "interrupt in DMA mode\n");
dprintk(NDEBUG_INTR, "scsi%d: PHASE MISM or EOP interrupt\n", HOSTNO);
NCR5380_dma_complete( instance );
done = 0;
if (hostdata->connected) {
NCR5380_dma_complete(instance);
queue_work(hostdata->work_q, &hostdata->main_task);
} else {
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
}
} else
#endif /* REAL_DMA */
{
/* MS: Ignore unknown phase mismatch interrupts (caused by EOP interrupt) */
if (basr & BASR_PHASE_MATCH)
dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt, "
"BASR 0x%x, MR 0x%x, SR 0x%x\n",
HOSTNO, basr, NCR5380_read(MODE_REG),
NCR5380_read(STATUS_REG));
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) &&
(sr & (SR_SEL | SR_IO | SR_BSY | SR_RST)) == (SR_SEL | SR_IO)) {
/* Probably reselected */
NCR5380_write(SELECT_ENABLE_REG, 0);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
dsprintk(NDEBUG_INTR, instance, "interrupt with SEL and IO\n");
if (!hostdata->connected) {
NCR5380_reselect(instance);
queue_work(hostdata->work_q, &hostdata->main_task);
}
if (!hostdata->connected)
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
} else {
/* Probably Bus Reset */
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
dsprintk(NDEBUG_INTR, instance, "unknown interrupt\n");
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
}
} /* if !(SELECTION || PARITY) */
handled = 1;
} /* BASR & IRQ */ else {
printk(KERN_NOTICE "scsi%d: interrupt without IRQ bit set in BASR, "
"BASR 0x%X, MR 0x%X, SR 0x%x\n", HOSTNO, basr,
NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG));
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
} else {
shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n");
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
}
if (!done) {
dprintk(NDEBUG_INTR, "scsi%d: in int routine, calling main\n", HOSTNO);
/* Put a call to NCR5380_main() on the queue... */
queue_main(shost_priv(instance));
}
spin_unlock_irqrestore(&hostdata->lock, flags);
return IRQ_RETVAL(handled);
}
......@@ -1286,9 +1190,9 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
* Inputs : instance - instantiation of the 5380 driver on which this
* target lives, cmd - SCSI command to execute.
*
* Returns : -1 if selection could not execute for some reason,
* 0 if selection succeeded or failed because the target
* did not respond.
* Returns cmd if selection failed but should be retried,
* NULL if selection failed and should not be retried, or
* NULL if selection succeeded (hostdata->connected == cmd).
*
* Side effects :
* If bus busy, arbitration failed, etc, NCR5380_select() will exit
......@@ -1304,30 +1208,33 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
* cmd->result host byte set to DID_BAD_TARGET.
*/
static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
SETUP_HOSTDATA(instance);
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char tmp[3], phase;
unsigned char *data;
int len;
unsigned long timeout;
unsigned long flags;
int err;
hostdata->restart_select = 0;
NCR5380_dprint(NDEBUG_ARBITRATION, instance);
dprintk(NDEBUG_ARBITRATION, "scsi%d: starting arbitration, id = %d\n", HOSTNO,
dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n",
instance->this_id);
/*
* Arbitration and selection phases are slow and involve dropping the
* lock, so we have to watch out for EH. An exception handler may
* change 'selecting' to NULL. This function will then return NULL
* so that the caller will forget about 'cmd'. (During information
* transfer phases, EH may change 'connected' to NULL.)
*/
hostdata->selecting = cmd;
/*
* Set the phase bits to 0, otherwise the NCR5380 won't drive the
* data bus during SELECTION.
*/
local_irq_save(flags);
if (hostdata->connected) {
local_irq_restore(flags);
return -1;
}
NCR5380_write(TARGET_COMMAND_REG, 0);
/*
......@@ -1337,96 +1244,77 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
NCR5380_write(MODE_REG, MR_ARBITRATE);
local_irq_restore(flags);
/* Wait for arbitration logic to complete */
#if defined(NCR_TIMEOUT)
{
unsigned long timeout = jiffies + 2*NCR_TIMEOUT;
/* The chip now waits for BUS FREE phase. Then after the 800 ns
* Bus Free Delay, arbitration will begin.
*/
while (!(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_PROGRESS) &&
time_before(jiffies, timeout) && !hostdata->connected)
;
if (time_after_eq(jiffies, timeout)) {
printk("scsi : arbitration timeout at %d\n", __LINE__);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
}
spin_unlock_irq(&hostdata->lock);
err = NCR5380_poll_politely2(instance, MODE_REG, MR_ARBITRATE, 0,
INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS,
ICR_ARBITRATION_PROGRESS, HZ);
spin_lock_irq(&hostdata->lock);
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) {
/* Reselection interrupt */
goto out;
}
#else /* NCR_TIMEOUT */
while (!(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_PROGRESS) &&
!hostdata->connected)
;
#endif
dprintk(NDEBUG_ARBITRATION, "scsi%d: arbitration complete\n", HOSTNO);
if (hostdata->connected) {
if (err < 0) {
NCR5380_write(MODE_REG, MR_BASE);
return -1;
shost_printk(KERN_ERR, instance,
"select: arbitration timeout\n");
goto out;
}
/*
* The arbitration delay is 2.2us, but this is a minimum and there is
* no maximum so we can safely sleep for ceil(2.2) usecs to accommodate
* the integral nature of udelay().
*
*/
spin_unlock_irq(&hostdata->lock);
/* The SCSI-2 arbitration delay is 2.4 us */
udelay(3);
/* Check for lost arbitration */
if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) ||
(NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) ||
(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) ||
hostdata->connected) {
(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
dprintk(NDEBUG_ARBITRATION, "scsi%d: lost arbitration, deasserting MR_ARBITRATE\n",
HOSTNO);
return -1;
dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n");
spin_lock_irq(&hostdata->lock);
goto out;
}
/* after/during arbitration, BSY should be asserted.
IBM DPES-31080 Version S31Q works now */
/* Tnx to Thomas_Roesch@m2.maus.de for finding this! (Roman) */
/* After/during arbitration, BSY should be asserted.
* IBM DPES-31080 Version S31Q works now
* Tnx to Thomas_Roesch@m2.maus.de for finding this! (Roman)
*/
NCR5380_write(INITIATOR_COMMAND_REG,
ICR_BASE | ICR_ASSERT_SEL | ICR_ASSERT_BSY);
if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) ||
hostdata->connected) {
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_ARBITRATION, "scsi%d: lost arbitration, deasserting ICR_ASSERT_SEL\n",
HOSTNO);
return -1;
}
/*
* Again, bus clear + bus settle time is 1.2us, however, this is
* a minimum so we'll udelay ceil(1.2)
*/
#ifdef CONFIG_ATARI_SCSI_TOSHIBA_DELAY
/* ++roman: But some targets (see above :-) seem to need a bit more... */
if (hostdata->flags & FLAG_TOSHIBA_DELAY)
udelay(15);
#else
else
udelay(2);
#endif
if (hostdata->connected) {
spin_lock_irq(&hostdata->lock);
/* NCR5380_reselect() clears MODE_REG after a reselection interrupt */
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE))
goto out;
if (!hostdata->selecting) {
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
return -1;
goto out;
}
dprintk(NDEBUG_ARBITRATION, "scsi%d: won arbitration\n", HOSTNO);
dsprintk(NDEBUG_ARBITRATION, instance, "won arbitration\n");
/*
* Now that we have won arbitration, start Selection process, asserting
* the host and target ID's on the SCSI bus.
*/
NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << cmd->device->id)));
NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask | (1 << scmd_id(cmd)));
/*
* Raise ATN while SEL is true before BSY goes false from arbitration,
......@@ -1434,22 +1322,18 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* phase immediately after selection.
*/
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY |
ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL ));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY |
ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL);
NCR5380_write(MODE_REG, MR_BASE);
/*
* Reselect interrupts must be turned off prior to the dropping of BSY,
* otherwise we will trigger an interrupt.
*/
if (hostdata->connected) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
return -1;
}
NCR5380_write(SELECT_ENABLE_REG, 0);
spin_unlock_irq(&hostdata->lock);
/*
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
......@@ -1457,8 +1341,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
/* Reset BSY */
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA |
ICR_ASSERT_ATN | ICR_ASSERT_SEL));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA |
ICR_ASSERT_ATN | ICR_ASSERT_SEL);
/*
* Something weird happens when we cease to drive BSY - looks
......@@ -1479,45 +1363,39 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
udelay(1);
dprintk(NDEBUG_SELECTION, "scsi%d: selecting target %d\n", HOSTNO, cmd->device->id);
dsprintk(NDEBUG_SELECTION, instance, "selecting target %d\n", scmd_id(cmd));
/*
* The SCSI specification calls for a 250 ms timeout for the actual
* selection.
*/
timeout = jiffies + msecs_to_jiffies(250);
/*
* XXX very interesting - we're seeing a bounce where the BSY we
* asserted is being reflected / still asserted (propagation delay?)
* and it's detecting as true. Sigh.
*/
#if 0
/* ++roman: If a target conformed to the SCSI standard, it wouldn't assert
* IO while SEL is true. But again, there are some disks out the in the
* world that do that nevertheless. (Somebody claimed that this announces
* reselection capability of the target.) So we better skip that test and
* only wait for BSY... (Famous german words: Der Klügere gibt nach :-)
*/
while (time_before(jiffies, timeout) &&
!(NCR5380_read(STATUS_REG) & (SR_BSY | SR_IO)))
;
err = NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, SR_BSY,
msecs_to_jiffies(250));
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_reselect(instance);
printk(KERN_ERR "scsi%d: reselection after won arbitration?\n",
HOSTNO);
if (!hostdata->connected)
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
shost_printk(KERN_ERR, instance, "reselection after won arbitration?\n");
goto out;
}
if (err < 0) {
spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/* Can't touch cmd if it has been reclaimed by the scsi ML */
if (hostdata->selecting) {
cmd->result = DID_BAD_TARGET << 16;
complete_cmd(instance, cmd);
dsprintk(NDEBUG_SELECTION, instance, "target did not respond within 250ms\n");
cmd = NULL;
}
goto out;
}
#else
while (time_before(jiffies, timeout) && !(NCR5380_read(STATUS_REG) & SR_BSY))
;
#endif
/*
* No less than two deskew delays after the initiator detects the
......@@ -1529,29 +1407,6 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
if (!(NCR5380_read(STATUS_REG) & SR_BSY)) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
if (hostdata->targets_present & (1 << cmd->device->id)) {
printk(KERN_ERR "scsi%d: weirdness\n", HOSTNO);
if (hostdata->restart_select)
printk(KERN_NOTICE "\trestart select\n");
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
}
cmd->result = DID_BAD_TARGET << 16;
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
#endif
cmd->scsi_done(cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
dprintk(NDEBUG_SELECTION, "scsi%d: target did not respond within 250ms\n", HOSTNO);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return 0;
}
hostdata->targets_present |= (1 << cmd->device->id);
/*
* Since we followed the SCSI spec, and raised ATN while SEL
* was true but before BSY was false during selection, the information
......@@ -1568,11 +1423,22 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
*/
/* Wait for start of REQ/ACK handshake */
while (!(NCR5380_read(STATUS_REG) & SR_REQ))
;
dprintk(NDEBUG_SELECTION, "scsi%d: target %d selected, going into MESSAGE OUT phase.\n",
HOSTNO, cmd->device->id);
err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
spin_lock_irq(&hostdata->lock);
if (err < 0) {
shost_printk(KERN_ERR, instance, "select: REQ timeout\n");
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
goto out;
}
if (!hostdata->selecting) {
do_abort(instance);
goto out;
}
dsprintk(NDEBUG_SELECTION, instance, "target %d selected, going into MESSAGE OUT phase.\n",
scmd_id(cmd));
tmp[0] = IDENTIFY(1, cmd->device->lun);
#ifdef SUPPORT_TAGS
......@@ -1591,11 +1457,12 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
data = tmp;
phase = PHASE_MSGOUT;
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_SELECTION, "scsi%d: nexus established.\n", HOSTNO);
dsprintk(NDEBUG_SELECTION, instance, "nexus established.\n");
/* XXX need to handle errors here */
hostdata->connected = cmd;
#ifndef SUPPORT_TAGS
hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
hostdata->busy[cmd->device->id] |= 1 << cmd->device->lun;
#endif
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
......@@ -1603,7 +1470,13 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
initialize_SCp(cmd);
return 0;
cmd = NULL;
out:
if (!hostdata->selecting)
return NULL;
hostdata->selecting = NULL;
return cmd;
}
/*
......@@ -1635,9 +1508,9 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance,
unsigned char *phase, int *count,
unsigned char **data)
{
register unsigned char p = *phase, tmp;
register int c = *count;
register unsigned char *d = *data;
unsigned char p = *phase, tmp;
int c = *count;
unsigned char *d = *data;
/*
* The NCR5380 chip will only drive the SCSI bus when the
......@@ -1652,14 +1525,15 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance,
* Wait for assertion of REQ, after which the phase bits will be
* valid
*/
while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ))
;
dprintk(NDEBUG_HANDSHAKE, "scsi%d: REQ detected\n", HOSTNO);
if (NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ) < 0)
break;
dsprintk(NDEBUG_HANDSHAKE, instance, "REQ asserted\n");
/* Check for phase mismatch */
if ((tmp & PHASE_MASK) != p) {
dprintk(NDEBUG_PIO, "scsi%d: phase mismatch\n", HOSTNO);
if ((NCR5380_read(STATUS_REG) & PHASE_MASK) != p) {
dsprintk(NDEBUG_PIO, instance, "phase mismatch\n");
NCR5380_dprint_phase(NDEBUG_PIO, instance);
break;
}
......@@ -1697,12 +1571,13 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance,
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ACK);
}
while (NCR5380_read(STATUS_REG) & SR_REQ)
;
if (NCR5380_poll_politely(instance,
STATUS_REG, SR_REQ, 0, 5 * HZ) < 0)
break;
dprintk(NDEBUG_HANDSHAKE, "scsi%d: req false, handshake complete\n", HOSTNO);
dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n");
/*
/*
* We have several special cases to consider during REQ/ACK handshaking :
* 1. We were in MSGOUT phase, and we are on the last byte of the
* message. ATN must be dropped as ACK is dropped.
......@@ -1721,16 +1596,16 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance,
}
} while (--c);
dprintk(NDEBUG_PIO, "scsi%d: residual %d\n", HOSTNO, c);
dsprintk(NDEBUG_PIO, instance, "residual %d\n", c);
*count = c;
*data = d;
tmp = NCR5380_read(STATUS_REG);
/* The phase read from the bus is valid if either REQ is (already)
* asserted or if ACK hasn't been released yet. The latter is the case if
* we're in MSGIN and all wanted bytes have been received.
* asserted or if ACK hasn't been released yet. The latter applies if
* we're in MSG IN, DATA IN or STATUS and all bytes have been received.
*/
if ((tmp & SR_REQ) || (p == PHASE_MSGIN && c == 0))
if ((tmp & SR_REQ) || ((tmp & SR_IO) && c == 0))
*phase = tmp & PHASE_MASK;
else
*phase = PHASE_UNKNOWN;
......@@ -1741,19 +1616,45 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance,
return -1;
}
/*
* Function : do_abort (Scsi_Host *host)
/**
* do_reset - issue a reset command
* @instance: adapter to reset
*
* Purpose : abort the currently established nexus. Should only be
* called from a routine which can drop into a
* Issue a reset sequence to the NCR5380 and try and get the bus
* back into sane shape.
*
* Returns : 0 on success, -1 on failure.
* This clears the reset interrupt flag because there may be no handler for
* it. When the driver is initialized, the NCR5380_intr() handler has not yet
* been installed. And when in EH we may have released the ST DMA interrupt.
*/
static void do_reset(struct Scsi_Host *instance)
{
unsigned long flags;
local_irq_save(flags);
NCR5380_write(TARGET_COMMAND_REG,
PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
udelay(50);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
local_irq_restore(flags);
}
/**
* do_abort - abort the currently established nexus by going to
* MESSAGE OUT phase and sending an ABORT message.
* @instance: relevant scsi host instance
*
* Returns 0 on success, -1 on failure.
*/
static int do_abort(struct Scsi_Host *instance)
{
unsigned char tmp, *msgptr, phase;
unsigned char *msgptr, phase, tmp;
int len;
int rc;
/* Request message out phase */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
......@@ -1768,16 +1669,20 @@ static int do_abort(struct Scsi_Host *instance)
* the target sees, so we just handshake.
*/
while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ))
;
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 10 * HZ);
if (rc < 0)
goto timeout;
tmp = NCR5380_read(STATUS_REG) & PHASE_MASK;
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
if ((tmp & PHASE_MASK) != PHASE_MSGOUT) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN |
ICR_ASSERT_ACK);
while (NCR5380_read(STATUS_REG) & SR_REQ)
;
if (tmp != PHASE_MSGOUT) {
NCR5380_write(INITIATOR_COMMAND_REG,
ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
if (rc < 0)
goto timeout;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
}
......@@ -1793,6 +1698,10 @@ static int do_abort(struct Scsi_Host *instance)
*/
return len ? -1 : 0;
timeout:
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
return -1;
}
#if defined(REAL_DMA)
......@@ -1812,7 +1721,6 @@ static int do_abort(struct Scsi_Host *instance)
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
*
*/
......@@ -1820,10 +1728,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
unsigned char *phase, int *count,
unsigned char **data)
{
SETUP_HOSTDATA(instance);
struct NCR5380_hostdata *hostdata = shost_priv(instance);
register int c = *count;
register unsigned char p = *phase;
unsigned long flags;
#if defined(CONFIG_SUN3)
/* sanity check */
......@@ -1834,29 +1741,22 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
}
hostdata->dma_len = c;
dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n",
instance->host_no, (p & SR_IO) ? "reading" : "writing",
c, (p & SR_IO) ? "to" : "from", *data);
dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n",
(p & SR_IO) ? "receive" : "send", c, *data);
/* netbsd turns off ints here, why not be safe and do it too */
local_irq_save(flags);
/* send start chain */
sun3scsi_dma_start(c, *data);
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
MR_ENABLE_EOP_INTR);
if (p & SR_IO) {
NCR5380_write(TARGET_COMMAND_REG, 1);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(INITIATOR_COMMAND_REG, 0);
NCR5380_write(MODE_REG,
(NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR));
NCR5380_write(START_DMA_INITIATOR_RECEIVE_REG, 0);
} else {
NCR5380_write(TARGET_COMMAND_REG, 0);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_DATA);
NCR5380_write(MODE_REG,
(NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR));
NCR5380_write(START_DMA_SEND_REG, 0);
}
......@@ -1864,8 +1764,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
dregs->csr |= CSR_DMA_ENABLE;
#endif
local_irq_restore(flags);
sun3_dma_active = 1;
#else /* !defined(CONFIG_SUN3) */
......@@ -1880,25 +1778,20 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
if (hostdata->read_overruns && (p & SR_IO))
c -= hostdata->read_overruns;
dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n",
HOSTNO, (p & SR_IO) ? "reading" : "writing",
c, (p & SR_IO) ? "to" : "from", d);
dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n",
(p & SR_IO) ? "receive" : "send", c, d);
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
#ifdef REAL_DMA
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
#endif /* def REAL_DMA */
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
MR_ENABLE_EOP_INTR);
if (!(hostdata->flags & FLAG_LATE_DMA_SETUP)) {
/* On the Medusa, it is a must to initialize the DMA before
* starting the NCR. This is also the cleaner way for the TT.
*/
local_irq_save(flags);
hostdata->dma_len = (p & SR_IO) ?
NCR5380_dma_read_setup(instance, d, c) :
NCR5380_dma_write_setup(instance, d, c);
local_irq_restore(flags);
}
if (p & SR_IO)
......@@ -1912,11 +1805,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
/* On the Falcon, the DMA setup must be done after the last */
/* NCR access, else the DMA setup gets trashed!
*/
local_irq_save(flags);
hostdata->dma_len = (p & SR_IO) ?
NCR5380_dma_read_setup(instance, d, c) :
NCR5380_dma_write_setup(instance, d, c);
local_irq_restore(flags);
}
#endif /* !defined(CONFIG_SUN3) */
......@@ -1943,8 +1834,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
static void NCR5380_information_transfer(struct Scsi_Host *instance)
{
SETUP_HOSTDATA(instance);
unsigned long flags;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char msgout = NOP;
int sink = 0;
int len;
......@@ -1953,13 +1843,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
#endif
unsigned char *data;
unsigned char phase, tmp, extended_msg[10], old_phase = 0xff;
struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected;
struct scsi_cmnd *cmd;
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
#endif
while (1) {
while ((cmd = hostdata->connected)) {
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
......@@ -1984,7 +1876,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
/* this command setup for dma yet? */
if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != cmd)) {
if (cmd->request->cmd_type == REQ_TYPE_FS) {
sun3scsi_dma_setup(d, count,
sun3scsi_dma_setup(instance, d, count,
rq_data_dir(cmd->request));
sun3_dma_setup_done = cmd;
}
......@@ -2012,12 +1904,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
switch (phase) {
case PHASE_DATAOUT:
#if (NDEBUG & NDEBUG_NO_DATAOUT)
printk("scsi%d: NDEBUG_NO_DATAOUT set, attempted DATAOUT "
"aborted\n", HOSTNO);
shost_printk(KERN_DEBUG, instance, "NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n");
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
cmd->scsi_done(cmd);
complete_cmd(instance, cmd);
return;
#endif
case PHASE_DATAIN:
......@@ -2031,12 +1922,9 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
--cmd->SCp.buffers_residual;
cmd->SCp.this_residual = cmd->SCp.buffer->length;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
/* ++roman: Try to merge some scatter-buffers if
* they are at contiguous physical addresses.
*/
merge_contiguous_buffers(cmd);
dprintk(NDEBUG_INFORMATION, "scsi%d: %d bytes and %d buffers left\n",
HOSTNO, cmd->SCp.this_residual,
dsprintk(NDEBUG_INFORMATION, instance, "%d bytes and %d buffers left\n",
cmd->SCp.this_residual,
cmd->SCp.buffers_residual);
}
......@@ -2056,11 +1944,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
*/
#if defined(REAL_DMA)
if (
#if !defined(CONFIG_SUN3)
!cmd->device->borken &&
transfersize = 0;
if (!cmd->device->borken)
#endif
(transfersize = NCR5380_dma_xfer_len(instance, cmd, phase)) >= DMA_MIN_SIZE) {
transfersize = NCR5380_dma_xfer_len(instance, cmd, phase);
if (transfersize >= DMA_MIN_SIZE) {
len = transfersize;
cmd->SCp.phase = phase;
if (NCR5380_transfer_dma(instance, &phase,
......@@ -2068,16 +1958,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
/*
* If the watchdog timer fires, all future
* accesses to this device will use the
* polled-IO. */
* polled-IO.
*/
scmd_printk(KERN_INFO, cmd,
"switching to slow handshake\n");
cmd->device->borken = 1;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE |
ICR_ASSERT_ATN);
sink = 1;
do_abort(instance);
cmd->result = DID_ERROR << 16;
cmd->scsi_done(cmd);
complete_cmd(instance, cmd);
/* XXX - need to source or sink data here, as appropriate */
} else {
#ifdef REAL_DMA
......@@ -2093,9 +1982,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
}
} else
#endif /* defined(REAL_DMA) */
{
spin_unlock_irq(&hostdata->lock);
NCR5380_transfer_pio(instance, &phase,
(int *)&cmd->SCp.this_residual,
(unsigned char **)&cmd->SCp.ptr);
spin_lock_irq(&hostdata->lock);
}
#if defined(CONFIG_SUN3) && defined(REAL_DMA)
/* if we had intended to dma that command clear it */
if (sun3_dma_setup_done == cmd)
......@@ -2105,162 +1998,64 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
case PHASE_MSGIN:
len = 1;
data = &tmp;
NCR5380_write(SELECT_ENABLE_REG, 0); /* disable reselects */
NCR5380_transfer_pio(instance, &phase, &len, &data);
cmd->SCp.Message = tmp;
switch (tmp) {
/*
* Linking lets us reduce the time required to get the
* next command out to the device, hopefully this will
* mean we don't waste another revolution due to the delays
* required by ARBITRATION and another SELECTION.
*
* In the current implementation proposal, low level drivers
* merely have to start the next command, pointed to by
* next_link, done() is called as with unlinked commands.
*/
#ifdef LINKED
case LINKED_CMD_COMPLETE:
case LINKED_FLG_CMD_COMPLETE:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_LINKED, "scsi%d: target %d lun %llu linked command "
"complete.\n", HOSTNO, cmd->device->id, cmd->device->lun);
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/*
* Sanity check : A linked command should only terminate
* with one of these messages if there are more linked
* commands available.
*/
if (!cmd->next_link) {
printk(KERN_NOTICE "scsi%d: target %d lun %llu "
"linked command complete, no next_link\n",
HOSTNO, cmd->device->id, cmd->device->lun);
sink = 1;
do_abort(instance);
return;
}
initialize_SCp(cmd->next_link);
/* The next command is still part of this process; copy it
* and don't free it! */
cmd->next_link->tag = cmd->tag;
cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
dprintk(NDEBUG_LINKED, "scsi%d: target %d lun %llu linked request "
"done, calling scsi_done().\n",
HOSTNO, cmd->device->id, cmd->device->lun);
cmd->scsi_done(cmd);
cmd = hostdata->connected;
break;
#endif /* def LINKED */
case ABORT:
case COMMAND_COMPLETE:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d, lun %llu "
"completed\n", HOSTNO, cmd->device->id, cmd->device->lun);
dsprintk(NDEBUG_QUEUES, instance,
"COMMAND COMPLETE %p target %d lun %llu\n",
cmd, scmd_id(cmd), cmd->device->lun);
local_irq_save(flags);
hostdata->retain_dma_intr++;
hostdata->connected = NULL;
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
if (status_byte(cmd->SCp.Status) == QUEUE_FULL) {
/* Turn a QUEUE FULL status into BUSY, I think the
* mid level cannot handle QUEUE FULL :-( (The
* command is retried after BUSY). Also update our
* queue size to the number of currently issued
* commands now.
*/
/* ++Andreas: the mid level code knows about
QUEUE_FULL now. */
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][cmd->device->lun];
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu returned "
"QUEUE_FULL after %d commands\n",
HOSTNO, cmd->device->id, cmd->device->lun,
ta->nr_allocated);
u8 lun = cmd->device->lun;
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun];
dsprintk(NDEBUG_TAGS, instance,
"QUEUE_FULL %p target %d lun %d nr_allocated %d\n",
cmd, scmd_id(cmd), lun, ta->nr_allocated);
if (ta->queue_size > ta->nr_allocated)
ta->nr_allocated = ta->queue_size;
ta->queue_size = ta->nr_allocated;
}
#else
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/*
* I'm not sure what the correct thing to do here is :
*
* If the command that just executed is NOT a request
* sense, the obvious thing to do is to set the result
* code to the values of the stored parameters.
*
* If it was a REQUEST SENSE command, we need some way to
* differentiate between the failure code of the original
* and the failure code of the REQUEST sense - the obvious
* case is success, where we fall through and leave the
* result code unchanged.
*
* The non-obvious place is where the REQUEST SENSE failed
*/
if (cmd->cmnd[0] != REQUEST_SENSE)
cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
else if (status_byte(cmd->SCp.Status) != GOOD)
cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
cmd->result &= ~0xffff;
cmd->result |= cmd->SCp.Status;
cmd->result |= cmd->SCp.Message << 8;
if ((cmd->cmnd[0] == REQUEST_SENSE) &&
hostdata->ses.cmd_len) {
scsi_eh_restore_cmnd(cmd, &hostdata->ses);
hostdata->ses.cmd_len = 0 ;
}
if ((cmd->cmnd[0] != REQUEST_SENSE) &&
(status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
dprintk(NDEBUG_AUTOSENSE, "scsi%d: performing request sense\n", HOSTNO);
LIST(cmd,hostdata->issue_queue);
SET_NEXT(cmd, hostdata->issue_queue);
hostdata->issue_queue = (struct scsi_cmnd *) cmd;
dprintk(NDEBUG_QUEUES, "scsi%d: REQUEST SENSE added to head of "
"issue queue\n", H_NO(cmd));
} else {
cmd->scsi_done(cmd);
if (cmd->cmnd[0] == REQUEST_SENSE)
complete_cmd(instance, cmd);
else {
if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION ||
cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) {
dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n",
cmd);
list_add_tail(&ncmd->list,
&hostdata->autosense);
} else
complete_cmd(instance, cmd);
}
local_irq_restore(flags);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
barrier();
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
local_irq_save(flags);
hostdata->retain_dma_intr--;
/* ++roman: For Falcon SCSI, release the lock on the
* ST-DMA here if no other commands are waiting on the
* disconnected queue.
*/
maybe_release_dma_irq(instance);
local_irq_restore(flags);
return;
case MESSAGE_REJECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
switch (hostdata->last_message) {
case HEAD_OF_QUEUE_TAG:
case ORDERED_QUEUE_TAG:
......@@ -2274,27 +2069,20 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
cmd->device->tagged_supported = 0;
hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
cmd->tag = TAG_NONE;
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu rejected "
"QUEUE_TAG message; tagged queuing "
"disabled\n",
HOSTNO, cmd->device->id, cmd->device->lun);
dsprintk(NDEBUG_TAGS, instance, "target %d lun %llu rejected QUEUE_TAG message; tagged queuing disabled\n",
scmd_id(cmd), cmd->device->lun);
break;
}
break;
case DISCONNECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
local_irq_save(flags);
cmd->device->disconnect = 1;
LIST(cmd,hostdata->disconnected_queue);
SET_NEXT(cmd, hostdata->disconnected_queue);
hostdata->connected = NULL;
hostdata->disconnected_queue = cmd;
local_irq_restore(flags);
dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d lun %llu was "
"moved from connected to the "
"disconnected_queue\n", HOSTNO,
cmd->device->id, cmd->device->lun);
list_add(&ncmd->list, &hostdata->disconnected);
dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
cmd, scmd_id(cmd), cmd->device->lun);
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
......@@ -2303,9 +2091,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/* Wait for bus free to avoid nasty timeouts */
while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
barrier();
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
......@@ -2324,37 +2109,30 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
case RESTORE_POINTERS:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
break;
case EXTENDED_MESSAGE:
/*
* Extended messages are sent in the following format :
* Byte
* 0 EXTENDED_MESSAGE == 1
* 1 length (includes one byte for code, doesn't
* include first two bytes)
* 2 code
* 3..length+1 arguments
*
* Start the extended message buffer with the EXTENDED_MESSAGE
* Start the message buffer with the EXTENDED_MESSAGE
* byte, since spi_print_msg() wants the whole thing.
*/
extended_msg[0] = EXTENDED_MESSAGE;
/* Accept first byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
dprintk(NDEBUG_EXTENDED, "scsi%d: receiving extended message\n", HOSTNO);
spin_unlock_irq(&hostdata->lock);
dsprintk(NDEBUG_EXTENDED, instance, "receiving extended message\n");
len = 2;
data = extended_msg + 1;
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_EXTENDED, "scsi%d: length=%d, code=0x%02x\n", HOSTNO,
(int)extended_msg[1], (int)extended_msg[2]);
dsprintk(NDEBUG_EXTENDED, instance, "length %d, code 0x%02x\n",
(int)extended_msg[1],
(int)extended_msg[2]);
if (!len && extended_msg[1] <=
(sizeof(extended_msg) - 1)) {
if (!len && extended_msg[1] > 0 &&
extended_msg[1] <= sizeof(extended_msg) - 2) {
/* Accept third byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
len = extended_msg[1] - 1;
......@@ -2362,8 +2140,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_EXTENDED, "scsi%d: message received, residual %d\n",
HOSTNO, len);
dsprintk(NDEBUG_EXTENDED, instance, "message received, residual %d\n",
len);
switch (extended_msg[2]) {
case EXTENDED_SDTR:
......@@ -2373,15 +2151,18 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
tmp = 0;
}
} else if (len) {
printk(KERN_NOTICE "scsi%d: error receiving "
"extended message\n", HOSTNO);
shost_printk(KERN_ERR, instance, "error receiving extended message\n");
tmp = 0;
} else {
printk(KERN_NOTICE "scsi%d: extended message "
"code %02x length %d is too long\n",
HOSTNO, extended_msg[2], extended_msg[1]);
shost_printk(KERN_NOTICE, instance, "extended message code %02x length %d is too long\n",
extended_msg[2], extended_msg[1]);
tmp = 0;
}
spin_lock_irq(&hostdata->lock);
if (!hostdata->connected)
return;
/* Fall through to reject message */
/*
......@@ -2390,8 +2171,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
*/
default:
if (!tmp) {
printk(KERN_INFO "scsi%d: rejecting message ",
instance->host_no);
shost_printk(KERN_ERR, instance, "rejecting message ");
spi_print_msg(extended_msg);
printk("\n");
} else if (tmp != EXTENDED_MESSAGE)
......@@ -2414,18 +2194,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
hostdata->last_message = msgout;
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (msgout == ABORT) {
local_irq_save(flags);
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
#else
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
hostdata->connected = NULL;
cmd->result = DID_ERROR << 16;
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
complete_cmd(instance, cmd);
maybe_release_dma_irq(instance);
local_irq_restore(flags);
cmd->scsi_done(cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
}
msgout = NOP;
......@@ -2447,11 +2220,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
cmd->SCp.Status = tmp;
break;
default:
printk("scsi%d: unknown phase\n", HOSTNO);
shost_printk(KERN_ERR, instance, "unknown phase\n");
NCR5380_dprint(NDEBUG_ANY, instance);
} /* switch(phase) */
} /* if (tmp * SR_REQ) */
} /* while (1) */
} else {
spin_unlock_irq(&hostdata->lock);
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
spin_lock_irq(&hostdata->lock);
}
}
}
/*
......@@ -2462,7 +2239,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
* nexus has been reestablished,
*
* Inputs : instance - this instance of the NCR5380.
*
*/
......@@ -2471,7 +2247,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
static void NCR5380_reselect(struct Scsi_Host *instance)
{
SETUP_HOSTDATA(instance);
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char target_mask;
unsigned char lun;
#ifdef SUPPORT_TAGS
......@@ -2480,7 +2256,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
unsigned char msg[3];
int __maybe_unused len;
unsigned char __maybe_unused *data, __maybe_unused phase;
struct scsi_cmnd *tmp = NULL, *prev;
struct NCR5380_cmd *ncmd;
struct scsi_cmnd *tmp;
/*
* Disable arbitration, etc. since the host adapter obviously
......@@ -2488,11 +2265,10 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
*/
NCR5380_write(MODE_REG, MR_BASE);
hostdata->restart_select = 1;
target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask);
dprintk(NDEBUG_RESELECTION, "scsi%d: reselect\n", HOSTNO);
dsprintk(NDEBUG_RESELECTION, instance, "reselect\n");
/*
* At this point, we have detected that our SCSI ID is on the bus,
......@@ -2504,17 +2280,22 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
*/
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY);
while (NCR5380_read(STATUS_REG) & SR_SEL)
;
if (NCR5380_poll_politely(instance,
STATUS_REG, SR_SEL, 0, 2 * HZ) < 0) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
return;
}
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/*
* Wait for target to go into MSGIN.
*/
while (!(NCR5380_read(STATUS_REG) & SR_REQ))
;
if (NCR5380_poll_politely(instance,
STATUS_REG, SR_REQ, SR_REQ, 2 * HZ) < 0) {
do_abort(instance);
return;
}
#if defined(CONFIG_SUN3) && defined(REAL_DMA)
/* acknowledge toggle to MSGIN */
......@@ -2527,15 +2308,21 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
data = msg;
phase = PHASE_MSGIN;
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (len) {
do_abort(instance);
return;
}
#endif
if (!(msg[0] & 0x80)) {
printk(KERN_DEBUG "scsi%d: expecting IDENTIFY message, got ", HOSTNO);
shost_printk(KERN_ERR, instance, "expecting IDENTIFY message, got ");
spi_print_msg(msg);
printk("\n");
do_abort(instance);
return;
}
lun = (msg[0] & 0x07);
lun = msg[0] & 0x07;
#if defined(SUPPORT_TAGS) && !defined(CONFIG_SUN3)
/* If the phase is still MSGIN, the target wants to send some more
......@@ -2551,8 +2338,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
if (!NCR5380_transfer_pio(instance, &phase, &len, &data) &&
msg[1] == SIMPLE_QUEUE_TAG)
tag = msg[2];
dprintk(NDEBUG_TAGS, "scsi%d: target mask %02x, lun %d sent tag %d at "
"reselection\n", HOSTNO, target_mask, lun, tag);
dsprintk(NDEBUG_TAGS, instance, "reselect: target mask %02x, lun %d sent tag %d\n",
target_mask, lun, tag);
}
#endif
......@@ -2561,36 +2348,34 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
* just reestablished, and remove it from the disconnected queue.
*/
for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL;
tmp; prev = tmp, tmp = NEXT(tmp)) {
if ((target_mask == (1 << tmp->device->id)) && (lun == tmp->device->lun)
tmp = NULL;
list_for_each_entry(ncmd, &hostdata->disconnected, list) {
struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
if (target_mask == (1 << scmd_id(cmd)) &&
lun == (u8)cmd->device->lun
#ifdef SUPPORT_TAGS
&& (tag == tmp->tag)
&& (tag == cmd->tag)
#endif
) {
if (prev) {
REMOVE(prev, NEXT(prev), tmp, NEXT(tmp));
SET_NEXT(prev, NEXT(tmp));
} else {
REMOVE(-1, hostdata->disconnected_queue, tmp, NEXT(tmp));
hostdata->disconnected_queue = NEXT(tmp);
}
SET_NEXT(tmp, NULL);
list_del(&ncmd->list);
tmp = cmd;
break;
}
}
if (!tmp) {
printk(KERN_WARNING "scsi%d: warning: target bitmask %02x lun %d "
#ifdef SUPPORT_TAGS
"tag %d "
#endif
"not in disconnected_queue.\n",
HOSTNO, target_mask, lun
if (tmp) {
dsprintk(NDEBUG_RESELECTION | NDEBUG_QUEUES, instance,
"reselect: removed %p from disconnected queue\n", tmp);
} else {
#ifdef SUPPORT_TAGS
, tag
shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d tag %d not in disconnected queue.\n",
target_mask, lun, tag);
#else
shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d not in disconnected queue.\n",
target_mask, lun);
#endif
);
/*
* Since we have an established nexus that we can't do anything
* with, we must abort it.
......@@ -2614,7 +2399,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
}
/* setup this command for dma if not already */
if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != tmp)) {
sun3scsi_dma_setup(d, count, rq_data_dir(tmp->request));
sun3scsi_dma_setup(instance, d, count,
rq_data_dir(tmp->request));
sun3_dma_setup_done = tmp;
}
}
......@@ -2639,235 +2425,196 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
if (!NCR5380_transfer_pio(instance, &phase, &len, &data) &&
msg[1] == SIMPLE_QUEUE_TAG)
tag = msg[2];
dprintk(NDEBUG_TAGS, "scsi%d: target mask %02x, lun %d sent tag %d at reselection\n"
HOSTNO, target_mask, lun, tag);
dsprintk(NDEBUG_TAGS, instance, "reselect: target mask %02x, lun %d sent tag %d\n"
target_mask, lun, tag);
}
#endif
hostdata->connected = tmp;
dprintk(NDEBUG_RESELECTION, "scsi%d: nexus established, target = %d, lun = %llu, tag = %d\n",
HOSTNO, tmp->device->id, tmp->device->lun, tmp->tag);
dsprintk(NDEBUG_RESELECTION, instance, "nexus established, target %d, lun %llu, tag %d\n",
scmd_id(tmp), tmp->device->lun, tmp->tag);
}
/*
* Function : int NCR5380_abort (struct scsi_cmnd *cmd)
*
* Purpose : abort a command
*
* Inputs : cmd - the scsi_cmnd to abort, code - code to set the
* host byte of the result field to, if zero DID_ABORTED is
* used.
*
* Returns : SUCCESS - success, FAILED on failure.
*
* XXX - there is no way to abort the command that is currently
* connected, you have to wait for it to complete. If this is
* a problem, we could implement longjmp() / setjmp(), setjmp()
* called where the loop started in NCR5380_main().
/**
* list_find_cmd - test for presence of a command in a linked list
* @haystack: list of commands
* @needle: command to search for
*/
static
int NCR5380_abort(struct scsi_cmnd *cmd)
static bool list_find_cmd(struct list_head *haystack,
struct scsi_cmnd *needle)
{
struct Scsi_Host *instance = cmd->device->host;
SETUP_HOSTDATA(instance);
struct scsi_cmnd *tmp, **prev;
unsigned long flags;
struct NCR5380_cmd *ncmd;
scmd_printk(KERN_NOTICE, cmd, "aborting command\n");
list_for_each_entry(ncmd, haystack, list)
if (NCR5380_to_scmd(ncmd) == needle)
return true;
return false;
}
NCR5380_print_status(instance);
/**
* list_remove_cmd - remove a command from linked list
* @haystack: list of commands
* @needle: command to remove
*/
local_irq_save(flags);
static bool list_del_cmd(struct list_head *haystack,
struct scsi_cmnd *needle)
{
if (list_find_cmd(haystack, needle)) {
struct NCR5380_cmd *ncmd = scsi_cmd_priv(needle);
dprintk(NDEBUG_ABORT, "scsi%d: abort called basr 0x%02x, sr 0x%02x\n", HOSTNO,
NCR5380_read(BUS_AND_STATUS_REG),
NCR5380_read(STATUS_REG));
list_del(&ncmd->list);
return true;
}
return false;
}
#if 1
/*
* Case 1 : If the command is the currently executing command,
* we'll set the aborted flag and return control so that
* information transfer routine can exit cleanly.
/**
* NCR5380_abort - scsi host eh_abort_handler() method
* @cmd: the command to be aborted
*
* Try to abort a given command by removing it from queues and/or sending
* the target an abort message. This may not succeed in causing a target
* to abort the command. Nonetheless, the low-level driver must forget about
* the command because the mid-layer reclaims it and it may be re-issued.
*
* The normal path taken by a command is as follows. For EH we trace this
* same path to locate and abort the command.
*
* unissued -> selecting -> [unissued -> selecting ->]... connected ->
* [disconnected -> connected ->]...
* [autosense -> connected ->] done
*
* If cmd is unissued then just remove it.
* If cmd is disconnected, try to select the target.
* If cmd is connected, try to send an abort message.
* If cmd is waiting for autosense, give it a chance to complete but check
* that it isn't left connected.
* If cmd was not found at all then presumably it has already been completed,
* in which case return SUCCESS to try to avoid further EH measures.
* If the command has not completed yet, we must not fail to find it.
*/
if (hostdata->connected == cmd) {
static int NCR5380_abort(struct scsi_cmnd *cmd)
{
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned long flags;
int result = SUCCESS;
dprintk(NDEBUG_ABORT, "scsi%d: aborting connected command\n", HOSTNO);
/*
* We should perform BSY checking, and make sure we haven't slipped
* into BUS FREE.
*/
spin_lock_irqsave(&hostdata->lock, flags);
/* NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN); */
/*
* Since we can't change phases until we've completed the current
* handshake, we have to source or sink a byte of data if the current
* phase is not MSGOUT.
*/
/*
* Return control to the executing NCR drive so we can clear the
* aborted flag and get back into our main loop.
*/
#if (NDEBUG & NDEBUG_ANY)
scmd_printk(KERN_INFO, cmd, __func__);
#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
if (do_abort(instance) == 0) {
hostdata->aborted = 1;
hostdata->connected = NULL;
if (list_del_cmd(&hostdata->unissued, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: removed %p from issue queue\n", cmd);
cmd->result = DID_ABORT << 16;
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
#else
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
maybe_release_dma_irq(instance);
local_irq_restore(flags);
cmd->scsi_done(cmd);
return SUCCESS;
} else {
local_irq_restore(flags);
printk("scsi%d: abort of connected command failed!\n", HOSTNO);
return FAILED;
cmd->scsi_done(cmd); /* No tag or busy flag to worry about */
}
if (hostdata->selecting == cmd) {
dsprintk(NDEBUG_ABORT, instance,
"abort: cmd %p == selecting\n", cmd);
hostdata->selecting = NULL;
cmd->result = DID_ABORT << 16;
complete_cmd(instance, cmd);
goto out;
}
#endif
/*
* Case 2 : If the command hasn't been issued yet, we simply remove it
* from the issue queue.
*/
for (prev = (struct scsi_cmnd **)&(hostdata->issue_queue),
tmp = (struct scsi_cmnd *)hostdata->issue_queue;
tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) {
if (cmd == tmp) {
REMOVE(5, *prev, tmp, NEXT(tmp));
(*prev) = NEXT(tmp);
SET_NEXT(tmp, NULL);
tmp->result = DID_ABORT << 16;
maybe_release_dma_irq(instance);
local_irq_restore(flags);
dprintk(NDEBUG_ABORT, "scsi%d: abort removed command from issue queue.\n",
HOSTNO);
/* Tagged queuing note: no tag to free here, hasn't been assigned
* yet... */
tmp->scsi_done(tmp);
return SUCCESS;
if (list_del_cmd(&hostdata->disconnected, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: removed %p from disconnected list\n", cmd);
cmd->result = DID_ERROR << 16;
if (!hostdata->connected)
NCR5380_select(instance, cmd);
if (hostdata->connected != cmd) {
complete_cmd(instance, cmd);
result = FAILED;
goto out;
}
}
/*
* Case 3 : If any commands are connected, we're going to fail the abort
* and let the high level SCSI driver retry at a later time or
* issue a reset.
*
* Timeouts, and therefore aborted commands, will be highly unlikely
* and handling them cleanly in this situation would make the common
* case of noresets less efficient, and would pollute our code. So,
* we fail.
*/
if (hostdata->connected) {
local_irq_restore(flags);
dprintk(NDEBUG_ABORT, "scsi%d: abort failed, command connected.\n", HOSTNO);
return FAILED;
if (hostdata->connected == cmd) {
dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd);
hostdata->connected = NULL;
if (do_abort(instance)) {
set_host_byte(cmd, DID_ERROR);
complete_cmd(instance, cmd);
result = FAILED;
goto out;
}
/*
* Case 4: If the command is currently disconnected from the bus, and
* there are no connected commands, we reconnect the I_T_L or
* I_T_L_Q nexus associated with it, go into message out, and send
* an abort message.
*
* This case is especially ugly. In order to reestablish the nexus, we
* need to call NCR5380_select(). The easiest way to implement this
* function was to abort if the bus was busy, and let the interrupt
* handler triggered on the SEL for reselect take care of lost arbitrations
* where necessary, meaning interrupts need to be enabled.
*
* When interrupts are enabled, the queues may change - so we
* can't remove it from the disconnected queue before selecting it
* because that could cause a failure in hashing the nexus if that
* device reselected.
*
* Since the queues may change, we can't use the pointers from when we
* first locate it.
*
* So, we must first locate the command, and if NCR5380_select()
* succeeds, then issue the abort, relocate the command and remove
* it from the disconnected queue.
*/
for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp;
tmp = NEXT(tmp)) {
if (cmd == tmp) {
local_irq_restore(flags);
dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO);
if (NCR5380_select(instance, cmd))
return FAILED;
dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO);
do_abort(instance);
local_irq_save(flags);
for (prev = (struct scsi_cmnd **)&(hostdata->disconnected_queue),
tmp = (struct scsi_cmnd *)hostdata->disconnected_queue;
tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) {
if (cmd == tmp) {
REMOVE(5, *prev, tmp, NEXT(tmp));
*prev = NEXT(tmp);
SET_NEXT(tmp, NULL);
tmp->result = DID_ABORT << 16;
/* We must unlock the tag/LUN immediately here, since the
* target goes to BUS FREE and doesn't send us another
* message (COMMAND_COMPLETE or the like)
*/
#ifdef SUPPORT_TAGS
cmd_free_tag(tmp);
#else
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
set_host_byte(cmd, DID_ABORT);
#ifdef REAL_DMA
hostdata->dma_len = 0;
#endif
maybe_release_dma_irq(instance);
local_irq_restore(flags);
tmp->scsi_done(tmp);
return SUCCESS;
if (cmd->cmnd[0] == REQUEST_SENSE)
complete_cmd(instance, cmd);
else {
struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
/* Perform autosense for this command */
list_add(&ncmd->list, &hostdata->autosense);
}
}
if (list_find_cmd(&hostdata->autosense, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: found %p on sense queue\n", cmd);
spin_unlock_irqrestore(&hostdata->lock, flags);
queue_work(hostdata->work_q, &hostdata->main_task);
msleep(1000);
spin_lock_irqsave(&hostdata->lock, flags);
if (list_del_cmd(&hostdata->autosense, cmd)) {
dsprintk(NDEBUG_ABORT, instance,
"abort: removed %p from sense queue\n", cmd);
set_host_byte(cmd, DID_ABORT);
complete_cmd(instance, cmd);
goto out;
}
}
/* Maybe it is sufficient just to release the ST-DMA lock... (if
* possible at all) At least, we should check if the lock could be
* released after the abort, in case it is kept due to some bug.
*/
maybe_release_dma_irq(instance);
local_irq_restore(flags);
if (hostdata->connected == cmd) {
dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd);
hostdata->connected = NULL;
if (do_abort(instance)) {
set_host_byte(cmd, DID_ERROR);
complete_cmd(instance, cmd);
result = FAILED;
goto out;
}
set_host_byte(cmd, DID_ABORT);
#ifdef REAL_DMA
hostdata->dma_len = 0;
#endif
complete_cmd(instance, cmd);
}
/*
* Case 5 : If we reached this point, the command was not found in any of
* the queues.
*
* We probably reached this point because of an unlikely race condition
* between the command completing successfully and the abortion code,
* so we won't panic, but we will notify the user in case something really
* broke.
*/
out:
if (result == FAILED)
dsprintk(NDEBUG_ABORT, instance, "abort: failed to abort %p\n", cmd);
else
dsprintk(NDEBUG_ABORT, instance, "abort: successfully aborted %p\n", cmd);
printk(KERN_INFO "scsi%d: warning : SCSI command probably completed successfully before abortion\n", HOSTNO);
queue_work(hostdata->work_q, &hostdata->main_task);
maybe_release_dma_irq(instance);
spin_unlock_irqrestore(&hostdata->lock, flags);
return FAILED;
return result;
}
/*
* Function : int NCR5380_reset (struct scsi_cmnd *cmd)
*
* Purpose : reset the SCSI bus.
*
* Returns : SUCCESS or FAILURE
/**
* NCR5380_bus_reset - reset the SCSI bus
* @cmd: SCSI command undergoing EH
*
* Returns SUCCESS
*/
static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
......@@ -2876,23 +2623,22 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int i;
unsigned long flags;
struct NCR5380_cmd *ncmd;
NCR5380_print_status(instance);
spin_lock_irqsave(&hostdata->lock, flags);
#if (NDEBUG & NDEBUG_ANY)
scmd_printk(KERN_INFO, cmd, __func__);
#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
do_reset(instance);
/* get in phase */
NCR5380_write(TARGET_COMMAND_REG,
PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG)));
/* assert RST */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
udelay(40);
/* reset NCR registers */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(TARGET_COMMAND_REG, 0);
NCR5380_write(SELECT_ENABLE_REG, 0);
/* ++roman: reset interrupt condition! otherwise no interrupts don't get
* through anymore ... */
(void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
/* After the reset, there are no more connected or disconnected commands
* and no busy units; so clear the low-level status here to avoid
......@@ -2900,17 +2646,34 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
* commands!
*/
if (hostdata->issue_queue)
dprintk(NDEBUG_ABORT, "scsi%d: reset aborted issued command(s)\n", H_NO(cmd));
if (hostdata->connected)
dprintk(NDEBUG_ABORT, "scsi%d: reset aborted a connected command\n", H_NO(cmd));
if (hostdata->disconnected_queue)
dprintk(NDEBUG_ABORT, "scsi%d: reset aborted disconnected command(s)\n", H_NO(cmd));
hostdata->selecting = NULL;
local_irq_save(flags);
hostdata->issue_queue = NULL;
list_for_each_entry(ncmd, &hostdata->disconnected, list) {
struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
set_host_byte(cmd, DID_RESET);
cmd->scsi_done(cmd);
}
list_for_each_entry(ncmd, &hostdata->autosense, list) {
struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
set_host_byte(cmd, DID_RESET);
cmd->scsi_done(cmd);
}
if (hostdata->connected) {
set_host_byte(hostdata->connected, DID_RESET);
complete_cmd(instance, hostdata->connected);
hostdata->connected = NULL;
hostdata->disconnected_queue = NULL;
}
if (hostdata->sensing) {
set_host_byte(hostdata->connected, DID_RESET);
complete_cmd(instance, hostdata->sensing);
hostdata->sensing = NULL;
}
#ifdef SUPPORT_TAGS
free_all_tags(hostdata);
#endif
......@@ -2920,8 +2683,9 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
hostdata->dma_len = 0;
#endif
queue_work(hostdata->work_q, &hostdata->main_task);
maybe_release_dma_irq(instance);
local_irq_restore(flags);
spin_unlock_irqrestore(&hostdata->lock, flags);
return SUCCESS;
}
drivers/scsi/atari_scsi.c
浏览文件 @ 60539fa3
......@@ -66,7 +66,6 @@
#include <linux/module.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/init.h>
......@@ -98,7 +97,6 @@
#define NCR5380_queue_command atari_scsi_queue_command
#define NCR5380_abort atari_scsi_abort
#define NCR5380_show_info atari_scsi_show_info
#define NCR5380_info atari_scsi_info
#define NCR5380_dma_read_setup(instance, data, count) \
......@@ -161,23 +159,10 @@ static inline unsigned long SCSI_DMA_GETADR(void)
return adr;
}
#define HOSTDATA_DMALEN (((struct NCR5380_hostdata *) \
(atari_scsi_host->hostdata))->dma_len)
/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms,
* we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more
* need ten times the standard value... */
#ifndef CONFIG_ATARI_SCSI_TOSHIBA_DELAY
#define AFTER_RESET_DELAY (HZ/2)
#else
#define AFTER_RESET_DELAY (5*HZ/2)
#endif
#ifdef REAL_DMA
static void atari_scsi_fetch_restbytes(void);
#endif
static struct Scsi_Host *atari_scsi_host;
static unsigned char (*atari_scsi_reg_read)(unsigned char reg);
static void (*atari_scsi_reg_write)(unsigned char reg, unsigned char value);
......@@ -208,12 +193,12 @@ static int setup_cmd_per_lun = -1;
module_param(setup_cmd_per_lun, int, 0);
static int setup_sg_tablesize = -1;
module_param(setup_sg_tablesize, int, 0);
#ifdef SUPPORT_TAGS
static int setup_use_tagged_queuing = -1;
module_param(setup_use_tagged_queuing, int, 0);
#endif
static int setup_hostid = -1;
module_param(setup_hostid, int, 0);
static int setup_toshiba_delay = -1;
module_param(setup_toshiba_delay, int, 0);
#if defined(REAL_DMA)
......@@ -273,15 +258,17 @@ static void scsi_dma_buserr(int irq, void *dummy)
#endif
static irqreturn_t scsi_tt_intr(int irq, void *dummy)
static irqreturn_t scsi_tt_intr(int irq, void *dev)
{
#ifdef REAL_DMA
struct Scsi_Host *instance = dev;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int dma_stat;
dma_stat = tt_scsi_dma.dma_ctrl;
dprintk(NDEBUG_INTR, "scsi%d: NCR5380 interrupt, DMA status = %02x\n",
atari_scsi_host->host_no, dma_stat & 0xff);
dsprintk(NDEBUG_INTR, instance, "NCR5380 interrupt, DMA status = %02x\n",
dma_stat & 0xff);
/* Look if it was the DMA that has interrupted: First possibility
* is that a bus error occurred...
......@@ -304,7 +291,8 @@ static irqreturn_t scsi_tt_intr(int irq, void *dummy)
* data reg!
*/
if ((dma_stat & 0x02) && !(dma_stat & 0x40)) {
atari_dma_residual = HOSTDATA_DMALEN - (SCSI_DMA_READ_P(dma_addr) - atari_dma_startaddr);
atari_dma_residual = hostdata->dma_len -
(SCSI_DMA_READ_P(dma_addr) - atari_dma_startaddr);
dprintk(NDEBUG_DMA, "SCSI DMA: There are %ld residual bytes.\n",
atari_dma_residual);
......@@ -356,15 +344,17 @@ static irqreturn_t scsi_tt_intr(int irq, void *dummy)
#endif /* REAL_DMA */
NCR5380_intr(irq, dummy);
NCR5380_intr(irq, dev);
return IRQ_HANDLED;
}
static irqreturn_t scsi_falcon_intr(int irq, void *dummy)
static irqreturn_t scsi_falcon_intr(int irq, void *dev)
{
#ifdef REAL_DMA
struct Scsi_Host *instance = dev;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int dma_stat;
/* Turn off DMA and select sector counter register before
......@@ -399,7 +389,7 @@ static irqreturn_t scsi_falcon_intr(int irq, void *dummy)
printk(KERN_ERR "SCSI DMA error: %ld bytes lost in "
"ST-DMA fifo\n", transferred & 15);
atari_dma_residual = HOSTDATA_DMALEN - transferred;
atari_dma_residual = hostdata->dma_len - transferred;
dprintk(NDEBUG_DMA, "SCSI DMA: There are %ld residual bytes.\n",
atari_dma_residual);
} else
......@@ -411,13 +401,14 @@ static irqreturn_t scsi_falcon_intr(int irq, void *dummy)
* data to the original destination address.
*/
memcpy(atari_dma_orig_addr, phys_to_virt(atari_dma_startaddr),
HOSTDATA_DMALEN - atari_dma_residual);
hostdata->dma_len - atari_dma_residual);
atari_dma_orig_addr = NULL;
}
#endif /* REAL_DMA */
NCR5380_intr(irq, dummy);
NCR5380_intr(irq, dev);
return IRQ_HANDLED;
}
......@@ -488,7 +479,7 @@ static int __init atari_scsi_setup(char *str)
* Defaults depend on TT or Falcon, determined at run time.
* Negative values mean don't change.
*/
int ints[6];
int ints[8];
get_options(str, ARRAY_SIZE(ints), ints);
......@@ -504,10 +495,11 @@ static int __init atari_scsi_setup(char *str)
setup_sg_tablesize = ints[3];
if (ints[0] >= 4)
setup_hostid = ints[4];
#ifdef SUPPORT_TAGS
if (ints[0] >= 5)
setup_use_tagged_queuing = ints[5];
#endif
/* ints[6] (use_pdma) is ignored */
if (ints[0] >= 7)
setup_toshiba_delay = ints[7];
return 1;
}
......@@ -516,38 +508,6 @@ __setup("atascsi=", atari_scsi_setup);
#endif /* !MODULE */
#ifdef CONFIG_ATARI_SCSI_RESET_BOOT
static void __init atari_scsi_reset_boot(void)
{
unsigned long end;
/*
* Do a SCSI reset to clean up the bus during initialization. No messing
* with the queues, interrupts, or locks necessary here.
*/
printk("Atari SCSI: resetting the SCSI bus...");
/* get in phase */
NCR5380_write(TARGET_COMMAND_REG,
PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG)));
/* assert RST */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
/* The min. reset hold time is 25us, so 40us should be enough */
udelay(50);
/* reset RST and interrupt */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
end = jiffies + AFTER_RESET_DELAY;
while (time_before(jiffies, end))
barrier();
printk(" done\n");
}
#endif
#if defined(REAL_DMA)
static unsigned long atari_scsi_dma_setup(struct Scsi_Host *instance,
......@@ -815,14 +775,14 @@ static int atari_scsi_bus_reset(struct scsi_cmnd *cmd)
static struct scsi_host_template atari_scsi_template = {
.module = THIS_MODULE,
.proc_name = DRV_MODULE_NAME,
.show_info = atari_scsi_show_info,
.name = "Atari native SCSI",
.info = atari_scsi_info,
.queuecommand = atari_scsi_queue_command,
.eh_abort_handler = atari_scsi_abort,
.eh_bus_reset_handler = atari_scsi_bus_reset,
.this_id = 7,
.use_clustering = DISABLE_CLUSTERING
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
};
static int __init atari_scsi_probe(struct platform_device *pdev)
......@@ -880,7 +840,7 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
} else {
/* Test if a host id is set in the NVRam */
if (ATARIHW_PRESENT(TT_CLK) && nvram_check_checksum()) {
unsigned char b = nvram_read_byte(14);
unsigned char b = nvram_read_byte(16);
/* Arbitration enabled? (for TOS)
* If yes, use configured host ID
......@@ -915,21 +875,18 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
error = -ENOMEM;
goto fail_alloc;
}
atari_scsi_host = instance;
#ifdef CONFIG_ATARI_SCSI_RESET_BOOT
atari_scsi_reset_boot();
#endif
instance->irq = irq->start;
host_flags |= IS_A_TT() ? 0 : FLAG_LATE_DMA_SETUP;
#ifdef SUPPORT_TAGS
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
NCR5380_init(instance, host_flags);
error = NCR5380_init(instance, host_flags);
if (error)
goto fail_init;
if (IS_A_TT()) {
error = request_irq(instance->irq, scsi_tt_intr, 0,
......@@ -975,6 +932,8 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
#endif
}
NCR5380_maybe_reset_bus(instance);
error = scsi_add_host(instance, NULL);
if (error)
goto fail_host;
......@@ -989,6 +948,7 @@ static int __init atari_scsi_probe(struct platform_device *pdev)
free_irq(instance->irq, instance);
fail_irq:
NCR5380_exit(instance);
fail_init:
scsi_host_put(instance);
fail_alloc:
if (atari_dma_buffer)
......
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
浏览文件 @ 60539fa3
......@@ -57,7 +57,7 @@ MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)");
static int cxgb3i_rx_credit_thres = 10 * 1024;
module_param(cxgb3i_rx_credit_thres, int, 0644);
MODULE_PARM_DESC(rx_credit_thres,
MODULE_PARM_DESC(cxgb3i_rx_credit_thres,
"RX credits return threshold in bytes (default=10KB)");
static unsigned int cxgb3i_max_connect = 8 * 1024;
......
drivers/scsi/dmx3191d.c
浏览文件 @ 60539fa3
......@@ -36,17 +36,10 @@
#define DONT_USE_INTR
#define NCR5380_read(reg) inb(port + reg)
#define NCR5380_write(reg, value) outb(value, port + reg)
#define NCR5380_read(reg) inb(instance->io_port + reg)
#define NCR5380_write(reg, value) outb(value, instance->io_port + reg)
#define NCR5380_implementation_fields /* none */
#define NCR5380_local_declare() unsigned int port
#define NCR5380_setup(instance) port = instance->io_port
/*
* Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
*/
#include <linux/delay.h>
#include "NCR5380.h"
#include "NCR5380.c"
......@@ -56,6 +49,7 @@
static struct scsi_host_template dmx3191d_driver_template = {
.module = THIS_MODULE,
.proc_name = DMX3191D_DRIVER_NAME,
.name = "Domex DMX3191D",
.info = NCR5380_info,
......@@ -67,6 +61,8 @@ static struct scsi_host_template dmx3191d_driver_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
static int dmx3191d_probe_one(struct pci_dev *pdev,
......@@ -97,17 +93,25 @@ static int dmx3191d_probe_one(struct pci_dev *pdev,
*/
shost->irq = NO_IRQ;
NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
error = NCR5380_init(shost, FLAG_NO_PSEUDO_DMA);
if (error)
goto out_host_put;
NCR5380_maybe_reset_bus(shost);
pci_set_drvdata(pdev, shost);
error = scsi_add_host(shost, &pdev->dev);
if (error)
goto out_release_region;
goto out_exit;
scsi_scan_host(shost);
return 0;
out_exit:
NCR5380_exit(shost);
out_host_put:
scsi_host_put(shost);
out_release_region:
release_region(io, DMX3191D_REGION_LEN);
out_disable_device:
......@@ -119,15 +123,14 @@ static int dmx3191d_probe_one(struct pci_dev *pdev,
static void dmx3191d_remove_one(struct pci_dev *pdev)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
unsigned long io = shost->io_port;
scsi_remove_host(shost);
NCR5380_exit(shost);
release_region(shost->io_port, DMX3191D_REGION_LEN);
pci_disable_device(pdev);
scsi_host_put(shost);
release_region(io, DMX3191D_REGION_LEN);
pci_disable_device(pdev);
}
static struct pci_device_id dmx3191d_pci_tbl[] = {
......
drivers/scsi/dtc.c
浏览文件 @ 60539fa3
#define PSEUDO_DMA
#define DONT_USE_INTR
#define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */
#define DMA_WORKS_RIGHT
/*
* DTC 3180/3280 driver, by
......@@ -50,15 +46,13 @@
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <scsi/scsi_host.h>
#include "dtc.h"
#define AUTOPROBE_IRQ
#include "NCR5380.h"
......@@ -150,7 +144,7 @@ static const struct signature {
static int __init dtc_setup(char *str)
{
static int commandline_current = 0;
static int commandline_current;
int i;
int ints[10];
......@@ -188,7 +182,7 @@ __setup("dtc=", dtc_setup);
static int __init dtc_detect(struct scsi_host_template * tpnt)
{
static int current_override = 0, current_base = 0;
static int current_override, current_base;
struct Scsi_Host *instance;
unsigned int addr;
void __iomem *base;
......@@ -205,9 +199,8 @@ static int __init dtc_detect(struct scsi_host_template * tpnt)
addr = 0;
} else
for (; !addr && (current_base < NO_BASES); ++current_base) {
#if (DTCDEBUG & DTCDEBUG_INIT)
printk(KERN_DEBUG "scsi-dtc : probing address %08x\n", bases[current_base].address);
#endif
dprintk(NDEBUG_INIT, "dtc: probing address 0x%08x\n",
(unsigned int)bases[current_base].address);
if (bases[current_base].noauto)
continue;
base = ioremap(bases[current_base].address, 0x2000);
......@@ -216,18 +209,14 @@ static int __init dtc_detect(struct scsi_host_template * tpnt)
for (sig = 0; sig < NO_SIGNATURES; ++sig) {
if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) {
addr = bases[current_base].address;
#if (DTCDEBUG & DTCDEBUG_INIT)
printk(KERN_DEBUG "scsi-dtc : detected board.\n");
#endif
dprintk(NDEBUG_INIT, "dtc: detected board\n");
goto found;
}
}
iounmap(base);
}
#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
printk(KERN_DEBUG "scsi-dtc : base = %08x\n", addr);
#endif
dprintk(NDEBUG_INIT, "dtc: addr = 0x%08x\n", addr);
if (!addr)
break;
......@@ -235,12 +224,15 @@ static int __init dtc_detect(struct scsi_host_template * tpnt)
found:
instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL)
break;
goto out_unmap;
instance->base = addr;
((struct NCR5380_hostdata *)(instance)->hostdata)->base = base;
NCR5380_init(instance, 0);
if (NCR5380_init(instance, FLAG_NO_DMA_FIXUP))
goto out_unregister;
NCR5380_maybe_reset_bus(instance);
NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */
if (overrides[current_override].irq != IRQ_AUTO)
......@@ -271,14 +263,19 @@ static int __init dtc_detect(struct scsi_host_template * tpnt)
printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no);
instance->irq = NO_IRQ;
#endif
#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
#endif
dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n",
instance->host_no, instance->irq);
++current_override;
++count;
}
return count;
out_unregister:
scsi_unregister(instance);
out_unmap:
iounmap(base);
return count;
}
/*
......@@ -331,12 +328,8 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst,
unsigned char *d = dst;
int i; /* For counting time spent in the poll-loop */
struct NCR5380_hostdata *hostdata = shost_priv(instance);
NCR5380_local_declare();
NCR5380_setup(instance);
i = 0;
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
if (instance->irq == NO_IRQ)
NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
else
......@@ -348,7 +341,7 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst,
while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
++i;
rtrc(3);
memcpy_fromio(d, base + DTC_DATA_BUF, 128);
memcpy_fromio(d, hostdata->base + DTC_DATA_BUF, 128);
d += 128;
len -= 128;
rtrc(7);
......@@ -358,9 +351,7 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst,
rtrc(4);
while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
++i;
NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
rtrc(0);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
if (i > hostdata->spin_max_r)
hostdata->spin_max_r = i;
return (0);
......@@ -383,12 +374,7 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
{
int i;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
NCR5380_local_declare();
NCR5380_setup(instance);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
/* set direction (write) */
if (instance->irq == NO_IRQ)
NCR5380_write(DTC_CONTROL_REG, 0);
else
......@@ -400,7 +386,7 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
++i;
rtrc(3);
memcpy_toio(base + DTC_DATA_BUF, src, 128);
memcpy_toio(hostdata->base + DTC_DATA_BUF, src, 128);
src += 128;
len -= 128;
}
......@@ -413,33 +399,44 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
++i;
rtrc(7);
/* Check for parity error here. fixme. */
NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
rtrc(0);
if (i > hostdata->spin_max_w)
hostdata->spin_max_w = i;
return (0);
}
static int dtc_dma_xfer_len(struct scsi_cmnd *cmd)
{
int transfersize = cmd->transfersize;
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks.
*/
if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
!(cmd->SCp.this_residual % transfersize))
transfersize = 32 * 1024;
return transfersize;
}
MODULE_LICENSE("GPL");
#include "NCR5380.c"
static int dtc_release(struct Scsi_Host *shost)
{
NCR5380_local_declare();
NCR5380_setup(shost);
struct NCR5380_hostdata *hostdata = shost_priv(shost);
if (shost->irq != NO_IRQ)
free_irq(shost->irq, shost);
NCR5380_exit(shost);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
iounmap(base);
iounmap(hostdata->base);
return 0;
}
static struct scsi_host_template driver_template = {
.name = "DTC 3180/3280 ",
.name = "DTC 3180/3280",
.detect = dtc_detect,
.release = dtc_release,
.proc_name = "dtc3x80",
......@@ -450,10 +447,12 @@ static struct scsi_host_template driver_template = {
.eh_abort_handler = dtc_abort,
.eh_bus_reset_handler = dtc_bus_reset,
.bios_param = dtc_biosparam,
.can_queue = CAN_QUEUE,
.can_queue = 32,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
#include "scsi_module.c"
drivers/scsi/dtc.h
浏览文件 @ 60539fa3
......@@ -10,54 +10,17 @@
#ifndef DTC3280_H
#define DTC3280_H
#define DTCDEBUG 0
#define DTCDEBUG_INIT 0x1
#define DTCDEBUG_TRANSFER 0x2
#ifndef CMD_PER_LUN
#define CMD_PER_LUN 2
#endif
#ifndef CAN_QUEUE
#define CAN_QUEUE 32
#endif
#define NCR5380_implementation_fields \
void __iomem *base
#define NCR5380_local_declare() \
void __iomem *base
#define NCR5380_setup(instance) \
base = ((struct NCR5380_hostdata *)(instance)->hostdata)->base
#define DTC_address(reg) \
(((struct NCR5380_hostdata *)shost_priv(instance))->base + DTC_5380_OFFSET + reg)
#define DTC_address(reg) (base + DTC_5380_OFFSET + reg)
#define dbNCR5380_read(reg) \
(rval=readb(DTC_address(reg)), \
(((unsigned char) printk("DTC : read register %d at addr %p is: %02x\n"\
, (reg), DTC_address(reg), rval)), rval ) )
#define dbNCR5380_write(reg, value) do { \
printk("DTC : write %02x to register %d at address %p\n", \
(value), (reg), DTC_address(reg)); \
writeb(value, DTC_address(reg));} while(0)
#if !(DTCDEBUG & DTCDEBUG_TRANSFER)
#define NCR5380_read(reg) (readb(DTC_address(reg)))
#define NCR5380_write(reg, value) (writeb(value, DTC_address(reg)))
#else
#define NCR5380_read(reg) (readb(DTC_address(reg)))
#define xNCR5380_read(reg) \
(((unsigned char) printk("DTC : read register %d at address %p\n"\
, (reg), DTC_address(reg))), readb(DTC_address(reg)))
#define NCR5380_write(reg, value) do { \
printk("DTC : write %02x to register %d at address %p\n", \
(value), (reg), DTC_address(reg)); \
writeb(value, DTC_address(reg));} while(0)
#endif
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
dtc_dma_xfer_len(cmd)
#define NCR5380_intr dtc_intr
#define NCR5380_queue_command dtc_queue_command
......
drivers/scsi/g_NCR5380.c
浏览文件 @ 60539fa3
......@@ -56,40 +56,31 @@
*
*/
/* settings for DTC3181E card with only Mustek scanner attached */
#define USLEEP_POLL msecs_to_jiffies(10)
#define USLEEP_SLEEP msecs_to_jiffies(200)
#define USLEEP_WAITLONG msecs_to_jiffies(5000)
#define AUTOPROBE_IRQ
#ifdef CONFIG_SCSI_GENERIC_NCR53C400
#define NCR53C400_PSEUDO_DMA 1
#define PSEUDO_DMA
#define NCR53C400
#endif
#include <asm/io.h>
#include <linux/signal.h>
#include <linux/blkdev.h>
#include <linux/module.h>
#include <scsi/scsi_host.h>
#include "g_NCR5380.h"
#include "NCR5380.h"
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/isapnp.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#define NCR_NOT_SET 0
static int ncr_irq = NCR_NOT_SET;
static int ncr_dma = NCR_NOT_SET;
static int ncr_addr = NCR_NOT_SET;
static int ncr_5380 = NCR_NOT_SET;
static int ncr_53c400 = NCR_NOT_SET;
static int ncr_53c400a = NCR_NOT_SET;
static int dtc_3181e = NCR_NOT_SET;
static int ncr_irq;
static int ncr_dma;
static int ncr_addr;
static int ncr_5380;
static int ncr_53c400;
static int ncr_53c400a;
static int dtc_3181e;
static int hp_c2502;
static struct override {
NCR5380_map_type NCR5380_map_name;
......@@ -121,7 +112,7 @@ static struct override {
static void __init internal_setup(int board, char *str, int *ints)
{
static int commandline_current = 0;
static int commandline_current;
switch (board) {
case BOARD_NCR5380:
if (ints[0] != 2 && ints[0] != 3) {
......@@ -235,6 +226,30 @@ static int __init do_DTC3181E_setup(char *str)
#endif
#ifndef SCSI_G_NCR5380_MEM
/*
* Configure I/O address of 53C400A or DTC436 by writing magic numbers
* to ports 0x779 and 0x379.
*/
static void magic_configure(int idx, u8 irq, u8 magic[])
{
u8 cfg = 0;
outb(magic[0], 0x779);
outb(magic[1], 0x379);
outb(magic[2], 0x379);
outb(magic[3], 0x379);
outb(magic[4], 0x379);
/* allowed IRQs for HP C2502 */
if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7)
irq = 0;
if (idx >= 0 && idx <= 7)
cfg = 0x80 | idx | (irq << 4);
outb(cfg, 0x379);
}
#endif
/**
* generic_NCR5380_detect - look for NCR5380 controllers
* @tpnt: the scsi template
......@@ -243,19 +258,18 @@ static int __init do_DTC3181E_setup(char *str)
* and DTC436(ISAPnP) controllers. If overrides have been set we use
* them.
*
* The caller supplied NCR5380_init function is invoked from here, before
* the interrupt line is taken.
*
* Locks: none
*/
static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
{
static int current_override = 0;
static int current_override;
int count;
unsigned int *ports;
u8 *magic = NULL;
#ifndef SCSI_G_NCR5380_MEM
int i;
int port_idx = -1;
unsigned long region_size = 16;
#endif
static unsigned int __initdata ncr_53c400a_ports[] = {
......@@ -264,27 +278,36 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
static unsigned int __initdata dtc_3181e_ports[] = {
0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
};
int flags = 0;
static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */
0x59, 0xb9, 0xc5, 0xae, 0xa6
};
static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */
0x0f, 0x22, 0xf0, 0x20, 0x80
};
int flags;
struct Scsi_Host *instance;
struct NCR5380_hostdata *hostdata;
#ifdef SCSI_G_NCR5380_MEM
unsigned long base;
void __iomem *iomem;
#endif
if (ncr_irq != NCR_NOT_SET)
if (ncr_irq)
overrides[0].irq = ncr_irq;
if (ncr_dma != NCR_NOT_SET)
if (ncr_dma)
overrides[0].dma = ncr_dma;
if (ncr_addr != NCR_NOT_SET)
if (ncr_addr)
overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
if (ncr_5380 != NCR_NOT_SET)
if (ncr_5380)
overrides[0].board = BOARD_NCR5380;
else if (ncr_53c400 != NCR_NOT_SET)
else if (ncr_53c400)
overrides[0].board = BOARD_NCR53C400;
else if (ncr_53c400a != NCR_NOT_SET)
else if (ncr_53c400a)
overrides[0].board = BOARD_NCR53C400A;
else if (dtc_3181e != NCR_NOT_SET)
else if (dtc_3181e)
overrides[0].board = BOARD_DTC3181E;
else if (hp_c2502)
overrides[0].board = BOARD_HP_C2502;
#ifndef SCSI_G_NCR5380_MEM
if (!current_override && isapnp_present()) {
struct pnp_dev *dev = NULL;
......@@ -318,41 +341,45 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
}
}
#endif
tpnt->proc_name = "g_NCR5380";
for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
if (!(overrides[current_override].NCR5380_map_name))
continue;
ports = NULL;
flags = 0;
switch (overrides[current_override].board) {
case BOARD_NCR5380:
flags = FLAG_NO_PSEUDO_DMA;
break;
case BOARD_NCR53C400:
flags = FLAG_NCR53C400;
#ifdef PSEUDO_DMA
flags = FLAG_NO_DMA_FIXUP;
#endif
break;
case BOARD_NCR53C400A:
flags = FLAG_NO_PSEUDO_DMA;
flags = FLAG_NO_DMA_FIXUP;
ports = ncr_53c400a_ports;
magic = ncr_53c400a_magic;
break;
case BOARD_HP_C2502:
flags = FLAG_NO_DMA_FIXUP;
ports = ncr_53c400a_ports;
magic = hp_c2502_magic;
break;
case BOARD_DTC3181E:
flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
flags = FLAG_NO_DMA_FIXUP;
ports = dtc_3181e_ports;
magic = ncr_53c400a_magic;
break;
}
#ifndef SCSI_G_NCR5380_MEM
if (ports) {
if (ports && magic) {
/* wakeup sequence for the NCR53C400A and DTC3181E */
/* Disable the adapter and look for a free io port */
outb(0x59, 0x779);
outb(0xb9, 0x379);
outb(0xc5, 0x379);
outb(0xae, 0x379);
outb(0xa6, 0x379);
outb(0x00, 0x379);
magic_configure(-1, 0, magic);
if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
for (i = 0; ports[i]; i++) {
......@@ -371,17 +398,12 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
}
if (ports[i]) {
/* At this point we have our region reserved */
outb(0x59, 0x779);
outb(0xb9, 0x379);
outb(0xc5, 0x379);
outb(0xae, 0x379);
outb(0xa6, 0x379);
outb(0x80 | i, 0x379); /* set io port to be used */
magic_configure(i, 0, magic); /* no IRQ yet */
outb(0xc0, ports[i] + 9);
if (inb(ports[i] + 9) != 0x80)
continue;
else
overrides[current_override].NCR5380_map_name = ports[i];
port_idx = i;
} else
continue;
}
......@@ -403,24 +425,65 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
}
#endif
instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL) {
#ifndef SCSI_G_NCR5380_MEM
release_region(overrides[current_override].NCR5380_map_name, region_size);
#else
iounmap(iomem);
release_mem_region(base, NCR5380_region_size);
#endif
continue;
}
if (instance == NULL)
goto out_release;
hostdata = shost_priv(instance);
instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
#ifndef SCSI_G_NCR5380_MEM
instance->io_port = overrides[current_override].NCR5380_map_name;
instance->n_io_port = region_size;
hostdata->io_width = 1; /* 8-bit PDMA by default */
/*
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
instance->io_port += 8;
hostdata->c400_ctl_status = 0;
hostdata->c400_blk_cnt = 1;
hostdata->c400_host_buf = 4;
break;
case BOARD_DTC3181E:
hostdata->io_width = 2; /* 16-bit PDMA */
/* fall through */
case BOARD_NCR53C400A:
case BOARD_HP_C2502:
hostdata->c400_ctl_status = 9;
hostdata->c400_blk_cnt = 10;
hostdata->c400_host_buf = 8;
break;
}
#else
((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
instance->base = overrides[current_override].NCR5380_map_name;
hostdata->iomem = iomem;
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
hostdata->c400_ctl_status = 0x100;
hostdata->c400_blk_cnt = 0x101;
hostdata->c400_host_buf = 0x104;
break;
case BOARD_DTC3181E:
case BOARD_NCR53C400A:
case BOARD_HP_C2502:
pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
goto out_unregister;
}
#endif
NCR5380_init(instance, flags);
if (NCR5380_init(instance, flags))
goto out_unregister;
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
case BOARD_DTC3181E:
case BOARD_NCR53C400A:
case BOARD_HP_C2502:
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
}
NCR5380_maybe_reset_bus(instance);
if (overrides[current_override].irq != IRQ_AUTO)
instance->irq = overrides[current_override].irq;
......@@ -431,12 +494,18 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
if (instance->irq == 255)
instance->irq = NO_IRQ;
if (instance->irq != NO_IRQ)
if (instance->irq != NO_IRQ) {
#ifndef SCSI_G_NCR5380_MEM
/* set IRQ for HP C2502 */
if (overrides[current_override].board == BOARD_HP_C2502)
magic_configure(port_idx, instance->irq, magic);
#endif
if (request_irq(instance->irq, generic_NCR5380_intr,
0, "NCR5380", instance)) {
printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
instance->irq = NO_IRQ;
}
}
if (instance->irq == NO_IRQ) {
printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
......@@ -447,6 +516,17 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
++count;
}
return count;
out_unregister:
scsi_unregister(instance);
out_release:
#ifndef SCSI_G_NCR5380_MEM
release_region(overrides[current_override].NCR5380_map_name, region_size);
#else
iounmap(iomem);
release_mem_region(base, NCR5380_region_size);
#endif
return count;
}
/**
......@@ -460,21 +540,15 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
{
NCR5380_local_declare();
NCR5380_setup(instance);
if (instance->irq != NO_IRQ)
free_irq(instance->irq, instance);
NCR5380_exit(instance);
#ifndef SCSI_G_NCR5380_MEM
release_region(instance->NCR5380_instance_name, instance->n_io_port);
release_region(instance->io_port, instance->n_io_port);
#else
iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
release_mem_region(instance->base, NCR5380_region_size);
#endif
return 0;
}
......@@ -507,7 +581,7 @@ generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
}
#endif
#ifdef NCR53C400_PSEUDO_DMA
#ifdef PSEUDO_DMA
/**
* NCR5380_pread - pseudo DMA read
......@@ -521,75 +595,68 @@ generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int blocks = len / 128;
int start = 0;
int bl;
NCR5380_local_declare();
NCR5380_setup(instance);
NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR);
NCR5380_write(hostdata->c400_blk_cnt, blocks);
while (1) {
if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
break;
}
if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
return -1;
}
while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
{
int i;
for (i = 0; i < 128; i++)
dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
}
if (hostdata->io_width == 2)
insw(instance->io_port + hostdata->c400_host_buf,
dst + start, 64);
else
insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
memcpy_fromio(dst + start,
hostdata->iomem + NCR53C400_host_buffer, 128);
#endif
start += 128;
blocks--;
}
if (blocks) {
while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
{
// FIXME - no timeout
}
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
{
int i;
for (i = 0; i < 128; i++)
dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
}
if (hostdata->io_width == 2)
insw(instance->io_port + hostdata->c400_host_buf,
dst + start, 64);
else
insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
memcpy_fromio(dst + start,
hostdata->iomem + NCR53C400_host_buffer, 128);
#endif
start += 128;
blocks--;
}
if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
printk("53C400r: no 53C80 gated irq after transfer");
#if 0
/*
* DON'T DO THIS - THEY NEVER ARRIVE!
*/
printk("53C400r: Waiting for 53C80 registers\n");
while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
/* wait for 53C80 registers to be available */
while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG))
;
#endif
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
printk(KERN_ERR "53C400r: no end dma signal\n");
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
return 0;
}
......@@ -605,88 +672,90 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst,
static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int blocks = len / 128;
int start = 0;
int bl;
int i;
NCR5380_local_declare();
NCR5380_setup(instance);
NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
NCR5380_write(hostdata->c400_blk_cnt, blocks);
while (1) {
if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
return -1;
}
if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
break;
}
while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - timeout
#ifndef SCSI_G_NCR5380_MEM
{
for (i = 0; i < 128; i++)
NCR5380_write(C400_HOST_BUFFER, src[start + i]);
}
if (hostdata->io_width == 2)
outsw(instance->io_port + hostdata->c400_host_buf,
src + start, 64);
else
outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
src + start, 128);
#endif
start += 128;
blocks--;
}
if (blocks) {
while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - no timeout
#ifndef SCSI_G_NCR5380_MEM
{
for (i = 0; i < 128; i++)
NCR5380_write(C400_HOST_BUFFER, src[start + i]);
}
if (hostdata->io_width == 2)
outsw(instance->io_port + hostdata->c400_host_buf,
src + start, 64);
else
outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
src + start, 128);
#endif
start += 128;
blocks--;
}
#if 0
printk("53C400w: waiting for registers to be available\n");
THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
printk("53C400w: Got em\n");
#endif
/* Let's wait for this instead - could be ugly */
/* All documentation says to check for this. Maybe my hardware is too
* fast. Waiting for it seems to work fine! KLL
*/
while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
; // FIXME - no timeout
/*
* I know. i is certainly != 0 here but the loop is new. See previous
* comment.
*/
if (i) {
if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
} else
printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
/* wait for 53C80 registers to be available */
while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) {
udelay(4); /* DTC436 chip hangs without this */
/* FIXME - no timeout */
}
#if 0
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
printk(KERN_ERR "53C400w: no end dma signal\n");
}
#endif
while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
; // TIMEOUT
return 0;
}
static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd)
{
int transfersize = cmd->transfersize;
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks.
*/
if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
!(cmd->SCp.this_residual % transfersize))
transfersize = 32 * 1024;
/* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */
if (transfersize % 128)
transfersize = 0;
return transfersize;
}
#endif /* PSEUDO_DMA */
/*
......@@ -696,7 +765,7 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
#include "NCR5380.c"
static struct scsi_host_template driver_template = {
.show_info = generic_NCR5380_show_info,
.proc_name = DRV_MODULE_NAME,
.name = "Generic NCR5380/NCR53C400 SCSI",
.detect = generic_NCR5380_detect,
.release = generic_NCR5380_release_resources,
......@@ -705,13 +774,15 @@ static struct scsi_host_template driver_template = {
.eh_abort_handler = generic_NCR5380_abort,
.eh_bus_reset_handler = generic_NCR5380_bus_reset,
.bios_param = NCR5380_BIOSPARAM,
.can_queue = CAN_QUEUE,
.can_queue = 16,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
#include <linux/module.h>
#include "scsi_module.c"
module_param(ncr_irq, int, 0);
......@@ -721,6 +792,7 @@ module_param(ncr_5380, int, 0);
module_param(ncr_53c400, int, 0);
module_param(ncr_53c400a, int, 0);
module_param(dtc_3181e, int, 0);
module_param(hp_c2502, int, 0);
MODULE_LICENSE("GPL");
#if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
......
drivers/scsi/g_NCR5380.h
浏览文件 @ 60539fa3
......@@ -14,81 +14,67 @@
#ifndef GENERIC_NCR5380_H
#define GENERIC_NCR5380_H
#ifdef NCR53C400
#ifdef CONFIG_SCSI_GENERIC_NCR53C400
#define BIOSPARAM
#define NCR5380_BIOSPARAM generic_NCR5380_biosparam
#else
#define NCR5380_BIOSPARAM NULL
#endif
#ifndef ASM
#ifndef CMD_PER_LUN
#define CMD_PER_LUN 2
#endif
#ifndef CAN_QUEUE
#define CAN_QUEUE 16
#endif
#define __STRVAL(x) #x
#define STRVAL(x) __STRVAL(x)
#ifndef SCSI_G_NCR5380_MEM
#define DRV_MODULE_NAME "g_NCR5380"
#define NCR5380_map_config port
#define NCR5380_map_type int
#define NCR5380_map_name port
#define NCR5380_instance_name io_port
#define NCR53C400_register_offset 0
#define NCR53C400_address_adjust 8
#ifdef NCR53C400
#ifdef CONFIG_SCSI_GENERIC_NCR53C400
#define NCR5380_region_size 16
#else
#define NCR5380_region_size 8
#endif
#define NCR5380_read(reg) (inb(NCR5380_map_name + (reg)))
#define NCR5380_write(reg, value) (outb((value), (NCR5380_map_name + (reg))))
#define NCR5380_read(reg) \
inb(instance->io_port + (reg))
#define NCR5380_write(reg, value) \
outb(value, instance->io_port + (reg))
#define NCR5380_implementation_fields \
NCR5380_map_type NCR5380_map_name
#define NCR5380_local_declare() \
register NCR5380_implementation_fields
#define NCR5380_setup(instance) \
NCR5380_map_name = (NCR5380_map_type)((instance)->NCR5380_instance_name)
int c400_ctl_status; \
int c400_blk_cnt; \
int c400_host_buf; \
int io_width;
#else
/* therefore SCSI_G_NCR5380_MEM */
#define DRV_MODULE_NAME "g_NCR5380_mmio"
#define NCR5380_map_config memory
#define NCR5380_map_type unsigned long
#define NCR5380_map_name base
#define NCR5380_instance_name base
#define NCR53C400_register_offset 0x108
#define NCR53C400_address_adjust 0
#define NCR53C400_mem_base 0x3880
#define NCR53C400_host_buffer 0x3900
#define NCR5380_region_size 0x3a00
#define NCR5380_read(reg) readb(iomem + NCR53C400_mem_base + (reg))
#define NCR5380_write(reg, value) writeb(value, iomem + NCR53C400_mem_base + (reg))
#define NCR5380_read(reg) \
readb(((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \
NCR53C400_mem_base + (reg))
#define NCR5380_write(reg, value) \
writeb(value, ((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \
NCR53C400_mem_base + (reg))
#define NCR5380_implementation_fields \
NCR5380_map_type NCR5380_map_name; \
void __iomem *iomem;
#define NCR5380_local_declare() \
register void __iomem *iomem
#define NCR5380_setup(instance) \
iomem = (((struct NCR5380_hostdata *)(instance)->hostdata)->iomem)
void __iomem *iomem; \
int c400_ctl_status; \
int c400_blk_cnt; \
int c400_host_buf;
#endif
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
generic_NCR5380_dma_xfer_len(cmd)
#define NCR5380_intr generic_NCR5380_intr
#define NCR5380_queue_command generic_NCR5380_queue_command
#define NCR5380_abort generic_NCR5380_abort
......@@ -102,7 +88,7 @@
#define BOARD_NCR53C400 1
#define BOARD_NCR53C400A 2
#define BOARD_DTC3181E 3
#define BOARD_HP_C2502 4
#endif /* ndef ASM */
#endif /* GENERIC_NCR5380_H */
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
浏览文件 @ 60539fa3
......@@ -247,41 +247,36 @@
/* ITCT header */
/* qw0 */
#define ITCT_HDR_DEV_TYPE_OFF 0
#define ITCT_HDR_DEV_TYPE_MSK (0x3 << ITCT_HDR_DEV_TYPE_OFF)
#define ITCT_HDR_DEV_TYPE_MSK (0x3ULL << ITCT_HDR_DEV_TYPE_OFF)
#define ITCT_HDR_VALID_OFF 2
#define ITCT_HDR_VALID_MSK (0x1 << ITCT_HDR_VALID_OFF)
#define ITCT_HDR_BREAK_REPLY_ENA_OFF 3
#define ITCT_HDR_BREAK_REPLY_ENA_MSK (0x1 << ITCT_HDR_BREAK_REPLY_ENA_OFF)
#define ITCT_HDR_VALID_MSK (0x1ULL << ITCT_HDR_VALID_OFF)
#define ITCT_HDR_AWT_CONTROL_OFF 4
#define ITCT_HDR_AWT_CONTROL_MSK (0x1 << ITCT_HDR_AWT_CONTROL_OFF)
#define ITCT_HDR_AWT_CONTROL_MSK (0x1ULL << ITCT_HDR_AWT_CONTROL_OFF)
#define ITCT_HDR_MAX_CONN_RATE_OFF 5
#define ITCT_HDR_MAX_CONN_RATE_MSK (0xf << ITCT_HDR_MAX_CONN_RATE_OFF)
#define ITCT_HDR_MAX_CONN_RATE_MSK (0xfULL << ITCT_HDR_MAX_CONN_RATE_OFF)
#define ITCT_HDR_VALID_LINK_NUM_OFF 9
#define ITCT_HDR_VALID_LINK_NUM_MSK (0xf << ITCT_HDR_VALID_LINK_NUM_OFF)
#define ITCT_HDR_VALID_LINK_NUM_MSK (0xfULL << ITCT_HDR_VALID_LINK_NUM_OFF)
#define ITCT_HDR_PORT_ID_OFF 13
#define ITCT_HDR_PORT_ID_MSK (0x7 << ITCT_HDR_PORT_ID_OFF)
#define ITCT_HDR_PORT_ID_MSK (0x7ULL << ITCT_HDR_PORT_ID_OFF)
#define ITCT_HDR_SMP_TIMEOUT_OFF 16
#define ITCT_HDR_SMP_TIMEOUT_MSK (0xffff << ITCT_HDR_SMP_TIMEOUT_OFF)
#define ITCT_HDR_MAX_BURST_BYTES_OFF 16
#define ITCT_HDR_MAX_BURST_BYTES_MSK (0xffffffff << \
ITCT_MAX_BURST_BYTES_OFF)
#define ITCT_HDR_SMP_TIMEOUT_MSK (0xffffULL << ITCT_HDR_SMP_TIMEOUT_OFF)
/* qw1 */
#define ITCT_HDR_MAX_SAS_ADDR_OFF 0
#define ITCT_HDR_MAX_SAS_ADDR_MSK (0xffffffffffffffff << \
ITCT_HDR_MAX_SAS_ADDR_OFF)
/* qw2 */
#define ITCT_HDR_IT_NEXUS_LOSS_TL_OFF 0
#define ITCT_HDR_IT_NEXUS_LOSS_TL_MSK (0xffff << \
#define ITCT_HDR_IT_NEXUS_LOSS_TL_MSK (0xffffULL << \
ITCT_HDR_IT_NEXUS_LOSS_TL_OFF)
#define ITCT_HDR_BUS_INACTIVE_TL_OFF 16
#define ITCT_HDR_BUS_INACTIVE_TL_MSK (0xffff << \
#define ITCT_HDR_BUS_INACTIVE_TL_MSK (0xffffULL << \
ITCT_HDR_BUS_INACTIVE_TL_OFF)
#define ITCT_HDR_MAX_CONN_TL_OFF 32
#define ITCT_HDR_MAX_CONN_TL_MSK (0xffff << \
#define ITCT_HDR_MAX_CONN_TL_MSK (0xffffULL << \
ITCT_HDR_MAX_CONN_TL_OFF)
#define ITCT_HDR_REJ_OPEN_TL_OFF 48
#define ITCT_HDR_REJ_OPEN_TL_MSK (0xffff << \
ITCT_REJ_OPEN_TL_OFF)
#define ITCT_HDR_REJ_OPEN_TL_MSK (0xffffULL << \
ITCT_HDR_REJ_OPEN_TL_OFF)
/* Err record header */
#define ERR_HDR_DMA_TX_ERR_TYPE_OFF 0
......@@ -533,10 +528,10 @@ static void setup_itct_v1_hw(struct hisi_hba *hisi_hba,
itct->sas_addr = __swab64(itct->sas_addr);
/* qw2 */
itct->qw2 = cpu_to_le64((500 < ITCT_HDR_IT_NEXUS_LOSS_TL_OFF) |
(0xff00 < ITCT_HDR_BUS_INACTIVE_TL_OFF) |
(0xff00 < ITCT_HDR_MAX_CONN_TL_OFF) |
(0xff00 < ITCT_HDR_REJ_OPEN_TL_OFF));
itct->qw2 = cpu_to_le64((500ULL << ITCT_HDR_IT_NEXUS_LOSS_TL_OFF) |
(0xff00ULL << ITCT_HDR_BUS_INACTIVE_TL_OFF) |
(0xff00ULL << ITCT_HDR_MAX_CONN_TL_OFF) |
(0xff00ULL << ITCT_HDR_REJ_OPEN_TL_OFF));
}
static void free_device_v1_hw(struct hisi_hba *hisi_hba,
......@@ -544,7 +539,8 @@ static void free_device_v1_hw(struct hisi_hba *hisi_hba,
{
u64 dev_id = sas_dev->device_id;
struct hisi_sas_itct *itct = &hisi_hba->itct[dev_id];
u32 qw0, reg_val = hisi_sas_read32(hisi_hba, CFG_AGING_TIME);
u64 qw0;
u32 reg_val = hisi_sas_read32(hisi_hba, CFG_AGING_TIME);
reg_val |= CFG_AGING_TIME_ITCT_REL_MSK;
hisi_sas_write32(hisi_hba, CFG_AGING_TIME, reg_val);
......
drivers/scsi/imm.c
浏览文件 @ 60539fa3
......@@ -43,6 +43,7 @@ typedef struct {
unsigned dp:1; /* Data phase present */
unsigned rd:1; /* Read data in data phase */
unsigned wanted:1; /* Parport sharing busy flag */
unsigned int dev_no; /* Device number */
wait_queue_head_t *waiting;
struct Scsi_Host *host;
struct list_head list;
......@@ -1120,15 +1121,40 @@ static struct scsi_host_template imm_template = {
static LIST_HEAD(imm_hosts);
/*
* Finds the first available device number that can be alloted to the
* new imm device and returns the address of the previous node so that
* we can add to the tail and have a list in the ascending order.
*/
static inline imm_struct *find_parent(void)
{
imm_struct *dev, *par = NULL;
unsigned int cnt = 0;
if (list_empty(&imm_hosts))
return NULL;
list_for_each_entry(dev, &imm_hosts, list) {
if (dev->dev_no != cnt)
return par;
cnt++;
par = dev;
}
return par;
}
static int __imm_attach(struct parport *pb)
{
struct Scsi_Host *host;
imm_struct *dev;
imm_struct *dev, *temp;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waiting);
DEFINE_WAIT(wait);
int ports;
int modes, ppb;
int err = -ENOMEM;
struct pardev_cb imm_cb;
init_waitqueue_head(&waiting);
......@@ -1141,9 +1167,15 @@ static int __imm_attach(struct parport *pb)
dev->mode = IMM_AUTODETECT;
INIT_LIST_HEAD(&dev->list);
dev->dev = parport_register_device(pb, "imm", NULL, imm_wakeup,
NULL, 0, dev);
temp = find_parent();
if (temp)
dev->dev_no = temp->dev_no + 1;
memset(&imm_cb, 0, sizeof(imm_cb));
imm_cb.private = dev;
imm_cb.wakeup = imm_wakeup;
dev->dev = parport_register_dev_model(pb, "imm", &imm_cb, dev->dev_no);
if (!dev->dev)
goto out;
......@@ -1207,7 +1239,10 @@ static int __imm_attach(struct parport *pb)
host->unique_id = pb->number;
*(imm_struct **)&host->hostdata = dev;
dev->host = host;
if (!temp)
list_add_tail(&dev->list, &imm_hosts);
else
list_add_tail(&dev->list, &temp->list);
err = scsi_add_host(host, NULL);
if (err)
goto out2;
......@@ -1246,8 +1281,9 @@ static void imm_detach(struct parport *pb)
static struct parport_driver imm_driver = {
.name = "imm",
.attach = imm_attach,
.match_port = imm_attach,
.detach = imm_detach,
.devmodel = true,
};
static int __init imm_driver_init(void)
......
drivers/scsi/ipr.c
浏览文件 @ 60539fa3
......@@ -4003,13 +4003,12 @@ static ssize_t ipr_store_update_fw(struct device *dev,
struct ipr_sglist *sglist;
char fname[100];
char *src;
int len, result, dnld_size;
int result, dnld_size;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
len = snprintf(fname, 99, "%s", buf);
fname[len-1] = '\0';
snprintf(fname, sizeof(fname), "%s", buf);
if (request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) {
dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname);
......
drivers/scsi/mac_scsi.c
浏览文件 @ 60539fa3
......@@ -12,7 +12,6 @@
*/
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
......@@ -32,14 +31,13 @@
#define PSEUDO_DMA
#define NCR5380_implementation_fields unsigned char *pdma_base
#define NCR5380_local_declare() struct Scsi_Host *_instance
#define NCR5380_setup(instance) _instance = instance
#define NCR5380_read(reg) macscsi_read(_instance, reg)
#define NCR5380_write(reg, value) macscsi_write(_instance, reg, value)
#define NCR5380_read(reg) macscsi_read(instance, reg)
#define NCR5380_write(reg, value) macscsi_write(instance, reg, value)
#define NCR5380_pread macscsi_pread
#define NCR5380_pwrite macscsi_pwrite
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr macscsi_intr
#define NCR5380_queue_command macscsi_queue_command
......@@ -51,8 +49,6 @@
#include "NCR5380.h"
#define RESET_BOOT
static int setup_can_queue = -1;
module_param(setup_can_queue, int, 0);
static int setup_cmd_per_lun = -1;
......@@ -65,17 +61,8 @@ static int setup_use_tagged_queuing = -1;
module_param(setup_use_tagged_queuing, int, 0);
static int setup_hostid = -1;
module_param(setup_hostid, int, 0);
/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms,
* we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more
* need ten times the standard value... */
#define TOSHIBA_DELAY
#ifdef TOSHIBA_DELAY
#define AFTER_RESET_DELAY (5*HZ/2)
#else
#define AFTER_RESET_DELAY (HZ/2)
#endif
static int setup_toshiba_delay = -1;
module_param(setup_toshiba_delay, int, 0);
/*
* NCR 5380 register access functions
......@@ -94,12 +81,12 @@ static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value)
#ifndef MODULE
static int __init mac_scsi_setup(char *str)
{
int ints[7];
int ints[8];
(void)get_options(str, ARRAY_SIZE(ints), ints);
if (ints[0] < 1 || ints[0] > 6) {
pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>]]]]]\n");
if (ints[0] < 1) {
pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n");
return 0;
}
if (ints[0] >= 1)
......@@ -114,50 +101,14 @@ static int __init mac_scsi_setup(char *str)
setup_use_tagged_queuing = ints[5];
if (ints[0] >= 6)
setup_use_pdma = ints[6];
if (ints[0] >= 7)
setup_toshiba_delay = ints[7];
return 1;
}
__setup("mac5380=", mac_scsi_setup);
#endif /* !MODULE */
#ifdef RESET_BOOT
/*
* Our 'bus reset on boot' function
*/
static void mac_scsi_reset_boot(struct Scsi_Host *instance)
{
unsigned long end;
NCR5380_local_declare();
NCR5380_setup(instance);
/*
* Do a SCSI reset to clean up the bus during initialization. No messing
* with the queues, interrupts, or locks necessary here.
*/
printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." );
/* get in phase */
NCR5380_write( TARGET_COMMAND_REG,
PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
/* assert RST */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
/* The min. reset hold time is 25us, so 40us should be enough */
udelay( 50 );
/* reset RST and interrupt */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
NCR5380_read( RESET_PARITY_INTERRUPT_REG );
for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
barrier();
printk(KERN_INFO " done\n" );
}
#endif
#ifdef PSEUDO_DMA
/*
Pseudo-DMA: (Ove Edlund)
......@@ -235,9 +186,6 @@ static int macscsi_pread(struct Scsi_Host *instance,
unsigned char *d;
unsigned char *s;
NCR5380_local_declare();
NCR5380_setup(instance);
s = hostdata->pdma_base + (INPUT_DATA_REG << 4);
d = dst;
......@@ -329,9 +277,6 @@ static int macscsi_pwrite(struct Scsi_Host *instance,
unsigned char *s;
unsigned char *d;
NCR5380_local_declare();
NCR5380_setup(instance);
s = src;
d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4);
......@@ -377,7 +322,9 @@ static struct scsi_host_template mac_scsi_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
static int __init mac_scsi_probe(struct platform_device *pdev)
......@@ -432,15 +379,14 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
} else
host_flags |= FLAG_NO_PSEUDO_DMA;
#ifdef RESET_BOOT
mac_scsi_reset_boot(instance);
#endif
#ifdef SUPPORT_TAGS
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
NCR5380_init(instance, host_flags);
error = NCR5380_init(instance, host_flags);
if (error)
goto fail_init;
if (instance->irq != NO_IRQ) {
error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
......@@ -449,6 +395,8 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
goto fail_irq;
}
NCR5380_maybe_reset_bus(instance);
error = scsi_add_host(instance, NULL);
if (error)
goto fail_host;
......@@ -463,6 +411,7 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
free_irq(instance->irq, instance);
fail_irq:
NCR5380_exit(instance);
fail_init:
scsi_host_put(instance);
return error;
}
......
drivers/scsi/megaraid/megaraid_mm.c
浏览文件 @ 60539fa3
......@@ -179,8 +179,12 @@ mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
/*
* The following call will block till a kioc is available
* or return NULL if the list head is empty for the pointer
* of type mraid_mmapt passed to mraid_mm_alloc_kioc
*/
kioc = mraid_mm_alloc_kioc(adp);
if (!kioc)
return -ENXIO;
/*
* User sent the old mimd_t ioctl packet. Convert it to uioc_t.
......
drivers/scsi/pas16.c
浏览文件 @ 60539fa3
#define PSEUDO_DMA
#define UNSAFE /* Not unsafe for PAS16 -- use it */
#define PDEBUG 0
/*
* This driver adapted from Drew Eckhardt's Trantor T128 driver
......@@ -71,14 +69,10 @@
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/proc_fs.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <scsi/scsi_host.h>
......@@ -87,8 +81,8 @@
#include "NCR5380.h"
static unsigned short pas16_addr = 0;
static int pas16_irq = 0;
static unsigned short pas16_addr;
static int pas16_irq;
static const int scsi_irq_translate[] =
......@@ -146,22 +140,6 @@ static const unsigned short pas16_offset[ 8 ] =
* START_DMA_INITIATOR_RECEIVE_REG wo
*/
};
/*----------------------------------------------------------------*/
/* the following will set the monitor border color (useful to find
where something crashed or gets stuck at */
/* 1 = blue
2 = green
3 = cyan
4 = red
5 = magenta
6 = yellow
7 = white
*/
#if 1
#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
#else
#define rtrc(i) {}
#endif
/*
......@@ -205,7 +183,7 @@ static void __init
outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
NCR5380_read( RESET_PARITY_INTERRUPT_REG );
inb(io_port + pas16_offset[RESET_PARITY_INTERRUPT_REG]);
/* Set the SCSI interrupt pointer without mucking up the sound
* interrupt pointer in the same byte.
......@@ -280,12 +258,12 @@ static int __init
* put in an additional test to try to weed them out.
*/
outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */
outb(0x20, io_port + pas16_offset[MODE_REG]); /* Is it really SCSI? */
if (inb(io_port + pas16_offset[MODE_REG]) != 0x20) /* Write to a reg. */
return 0; /* and try to read */
NCR5380_write( MODE_REG, 0x00 ); /* it back. */
if( NCR5380_read( MODE_REG ) != 0x00 )
outb(0x00, io_port + pas16_offset[MODE_REG]); /* it back. */
if (inb(io_port + pas16_offset[MODE_REG]) != 0x00)
return 0;
return 1;
......@@ -305,7 +283,7 @@ static int __init
static int __init pas16_setup(char *str)
{
static int commandline_current = 0;
static int commandline_current;
int i;
int ints[10];
......@@ -344,8 +322,8 @@ __setup("pas16=", pas16_setup);
static int __init pas16_detect(struct scsi_host_template *tpnt)
{
static int current_override = 0;
static unsigned short current_base = 0;
static int current_override;
static unsigned short current_base;
struct Scsi_Host *instance;
unsigned short io_port;
int count;
......@@ -377,34 +355,32 @@ static int __init pas16_detect(struct scsi_host_template *tpnt)
}
else
for (; !io_port && (current_base < NO_BASES); ++current_base) {
#if (PDEBUG & PDEBUG_INIT)
printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
#endif
dprintk(NDEBUG_INIT, "pas16: probing io_port 0x%04x\n",
(unsigned int)bases[current_base].io_port);
if ( !bases[current_base].noauto &&
pas16_hw_detect( current_base ) ){
io_port = bases[current_base].io_port;
init_board( io_port, default_irqs[ current_base ], 0 );
#if (PDEBUG & PDEBUG_INIT)
printk("scsi-pas16 : detected board.\n");
#endif
dprintk(NDEBUG_INIT, "pas16: detected board\n");
}
}
#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
#endif
dprintk(NDEBUG_INIT, "pas16: io_port = 0x%04x\n",
(unsigned int)io_port);
if (!io_port)
break;
instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
if(instance == NULL)
break;
goto out;
instance->io_port = io_port;
NCR5380_init(instance, 0);
if (NCR5380_init(instance, 0))
goto out_unregister;
NCR5380_maybe_reset_bus(instance);
if (overrides[current_override].irq != IRQ_AUTO)
instance->irq = overrides[current_override].irq;
......@@ -431,14 +407,18 @@ static int __init pas16_detect(struct scsi_host_template *tpnt)
outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
}
#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
#endif
dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n",
instance->host_no, instance->irq);
++current_override;
++count;
}
return count;
out_unregister:
scsi_unregister(instance);
out:
return count;
}
/*
......@@ -561,8 +541,6 @@ static int pas16_release(struct Scsi_Host *shost)
if (shost->irq != NO_IRQ)
free_irq(shost->irq, shost);
NCR5380_exit(shost);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
return 0;
}
......@@ -579,11 +557,13 @@ static struct scsi_host_template driver_template = {
.eh_abort_handler = pas16_abort,
.eh_bus_reset_handler = pas16_bus_reset,
.bios_param = pas16_biosparam,
.can_queue = CAN_QUEUE,
.can_queue = 32,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
#include "scsi_module.c"
......
drivers/scsi/pas16.h
浏览文件 @ 60539fa3
......@@ -24,9 +24,6 @@
#ifndef PAS16_H
#define PAS16_H
#define PDEBUG_INIT 0x1
#define PDEBUG_TRANSFER 0x2
#define PAS16_DEFAULT_BASE_1 0x388
#define PAS16_DEFAULT_BASE_2 0x384
#define PAS16_DEFAULT_BASE_3 0x38c
......@@ -98,46 +95,16 @@
#define OPERATION_MODE_1 0xec03
#define IO_CONFIG_3 0xf002
#define NCR5380_implementation_fields /* none */
#ifndef ASM
#ifndef CMD_PER_LUN
#define CMD_PER_LUN 2
#endif
#ifndef CAN_QUEUE
#define CAN_QUEUE 32
#endif
#define NCR5380_implementation_fields \
volatile unsigned short io_port
#define NCR5380_local_declare() \
volatile unsigned short io_port
#define PAS16_io_port(reg) (instance->io_port + pas16_offset[(reg)])
#define NCR5380_setup(instance) \
io_port = (instance)->io_port
#define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] )
#if !(PDEBUG & PDEBUG_TRANSFER)
#define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )
#define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )
#else
#define NCR5380_read(reg) \
(((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\
, instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) )
#define NCR5380_write(reg, value) \
(printk("scsi%d : write %02x to register %d at io_port %04x\n", \
instance->hostno, (value), (reg), PAS16_io_port(reg)), \
outb( (value),PAS16_io_port(reg) ) )
#endif
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr pas16_intr
#define do_NCR5380_intr do_pas16_intr
#define NCR5380_queue_command pas16_queue_command
#define NCR5380_abort pas16_abort
#define NCR5380_bus_reset pas16_bus_reset
......@@ -150,5 +117,4 @@
#define PAS16_IRQS 0xd4a8
#endif /* ndef ASM */
#endif /* PAS16_H */
drivers/scsi/scsi_devinfo.c
浏览文件 @ 60539fa3
......@@ -227,6 +227,7 @@ static struct {
{"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
{"Promise", "", NULL, BLIST_SPARSELUN},
{"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
{"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
{"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
{"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
{"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
......
drivers/scsi/storvsc_drv.c
浏览文件 @ 60539fa3
......@@ -390,7 +390,7 @@ module_param(storvsc_ringbuffer_size, int, S_IRUGO);
MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)");
module_param(storvsc_vcpus_per_sub_channel, int, S_IRUGO);
MODULE_PARM_DESC(vcpus_per_sub_channel, "Ratio of VCPUs to subchannels");
MODULE_PARM_DESC(storvsc_vcpus_per_sub_channel, "Ratio of VCPUs to subchannels");
/*
* Timeout in seconds for all devices managed by this driver.
*/
......
drivers/scsi/sun3_scsi.c
浏览文件 @ 60539fa3
......@@ -53,13 +53,12 @@
#define NCR5380_queue_command sun3scsi_queue_command
#define NCR5380_bus_reset sun3scsi_bus_reset
#define NCR5380_abort sun3scsi_abort
#define NCR5380_show_info sun3scsi_show_info
#define NCR5380_info sun3scsi_info
#define NCR5380_dma_read_setup(instance, data, count) \
sun3scsi_dma_setup(data, count, 0)
sun3scsi_dma_setup(instance, data, count, 0)
#define NCR5380_dma_write_setup(instance, data, count) \
sun3scsi_dma_setup(data, count, 1)
sun3scsi_dma_setup(instance, data, count, 1)
#define NCR5380_dma_residual(instance) \
sun3scsi_dma_residual(instance)
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
......@@ -86,10 +85,6 @@ module_param(setup_use_tagged_queuing, int, 0);
static int setup_hostid = -1;
module_param(setup_hostid, int, 0);
/* #define RESET_BOOT */
#define AFTER_RESET_DELAY (HZ/2)
/* ms to wait after hitting dma regs */
#define SUN3_DMA_DELAY 10
......@@ -100,11 +95,10 @@ static struct scsi_cmnd *sun3_dma_setup_done;
static unsigned char *sun3_scsi_regp;
static volatile struct sun3_dma_regs *dregs;
static struct sun3_udc_regs *udc_regs;
static unsigned char *sun3_dma_orig_addr = NULL;
static unsigned long sun3_dma_orig_count = 0;
static int sun3_dma_active = 0;
static unsigned long last_residual = 0;
static struct Scsi_Host *default_instance;
static unsigned char *sun3_dma_orig_addr;
static unsigned long sun3_dma_orig_count;
static int sun3_dma_active;
static unsigned long last_residual;
/*
* NCR 5380 register access functions
......@@ -144,50 +138,12 @@ static inline void sun3_udc_write(unsigned short val, unsigned char reg)
}
#endif
#ifdef RESET_BOOT
static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
{
unsigned long end;
/*
* Do a SCSI reset to clean up the bus during initialization. No
* messing with the queues, interrupts, or locks necessary here.
*/
printk( "Sun3 SCSI: resetting the SCSI bus..." );
/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
// sun3_disable_irq( IRQ_SUN3_SCSI );
/* get in phase */
NCR5380_write( TARGET_COMMAND_REG,
PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
/* assert RST */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
/* The min. reset hold time is 25us, so 40us should be enough */
udelay( 50 );
/* reset RST and interrupt */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
NCR5380_read( RESET_PARITY_INTERRUPT_REG );
for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
barrier();
/* switch on SCSI IRQ again */
// sun3_enable_irq( IRQ_SUN3_SCSI );
printk( " done\n" );
}
#endif
// safe bits for the CSR
#define CSR_GOOD 0x060f
static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
static irqreturn_t scsi_sun3_intr(int irq, void *dev)
{
struct Scsi_Host *instance = dev;
unsigned short csr = dregs->csr;
int handled = 0;
......@@ -196,46 +152,24 @@ static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
#endif
if(csr & ~CSR_GOOD) {
if(csr & CSR_DMA_BUSERR) {
printk("scsi%d: bus error in dma\n", default_instance->host_no);
}
if(csr & CSR_DMA_CONFLICT) {
printk("scsi%d: dma conflict\n", default_instance->host_no);
}
if (csr & CSR_DMA_BUSERR)
shost_printk(KERN_ERR, instance, "bus error in DMA\n");
if (csr & CSR_DMA_CONFLICT)
shost_printk(KERN_ERR, instance, "DMA conflict\n");
handled = 1;
}
if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
NCR5380_intr(irq, dummy);
NCR5380_intr(irq, dev);
handled = 1;
}
return IRQ_RETVAL(handled);
}
/*
* Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
* reentering NCR5380_print_status seems to have ugly side effects
*/
/* this doesn't seem to get used at all -- sam */
#if 0
void sun3_sun3_debug (void)
{
unsigned long flags;
if (default_instance) {
local_irq_save(flags);
NCR5380_print_status(default_instance);
local_irq_restore(flags);
}
}
#endif
/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
static unsigned long sun3scsi_dma_setup(struct Scsi_Host *instance,
void *data, unsigned long count, int write_flag)
{
void *addr;
......@@ -287,10 +221,9 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri
dregs->csr |= CSR_FIFO;
if(dregs->fifo_count != count) {
printk("scsi%d: fifo_mismatch %04x not %04x\n",
default_instance->host_no, dregs->fifo_count,
(unsigned int) count);
NCR5380_dprint(NDEBUG_DMA, default_instance);
shost_printk(KERN_ERR, instance, "FIFO mismatch %04x not %04x\n",
dregs->fifo_count, (unsigned int) count);
NCR5380_dprint(NDEBUG_DMA, instance);
}
/* setup udc */
......@@ -325,21 +258,6 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri
}
#ifndef SUN3_SCSI_VME
static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)
{
unsigned short resid;
dregs->udc_addr = 0x32;
udelay(SUN3_DMA_DELAY);
resid = dregs->udc_data;
udelay(SUN3_DMA_DELAY);
resid *= 2;
return (unsigned long) resid;
}
#endif
static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
{
return last_residual;
......@@ -437,7 +355,10 @@ static int sun3scsi_dma_finish(int write_flag)
}
}
count = sun3scsi_dma_count(default_instance);
dregs->udc_addr = 0x32;
udelay(SUN3_DMA_DELAY);
count = 2 * dregs->udc_data;
udelay(SUN3_DMA_DELAY);
fifo = dregs->fifo_count;
last_residual = fifo;
......@@ -502,7 +423,6 @@ static int sun3scsi_dma_finish(int write_flag)
static struct scsi_host_template sun3_scsi_template = {
.module = THIS_MODULE,
.proc_name = DRV_MODULE_NAME,
.show_info = sun3scsi_show_info,
.name = SUN3_SCSI_NAME,
.info = sun3scsi_info,
.queuecommand = sun3scsi_queue_command,
......@@ -512,7 +432,8 @@ static struct scsi_host_template sun3_scsi_template = {
.this_id = 7,
.sg_tablesize = SG_NONE,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
};
static int __init sun3_scsi_probe(struct platform_device *pdev)
......@@ -591,7 +512,6 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
error = -ENOMEM;
goto fail_alloc;
}
default_instance = instance;
instance->io_port = (unsigned long)ioaddr;
instance->irq = irq->start;
......@@ -600,7 +520,9 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
NCR5380_init(instance, host_flags);
error = NCR5380_init(instance, host_flags);
if (error)
goto fail_init;
error = request_irq(instance->irq, scsi_sun3_intr, 0,
"NCR5380", instance);
......@@ -631,9 +553,7 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
#endif
#ifdef RESET_BOOT
sun3_scsi_reset_boot(instance);
#endif
NCR5380_maybe_reset_bus(instance);
error = scsi_add_host(instance, NULL);
if (error)
......@@ -649,6 +569,7 @@ static int __init sun3_scsi_probe(struct platform_device *pdev)
free_irq(instance->irq, instance);
fail_irq:
NCR5380_exit(instance);
fail_init:
scsi_host_put(instance);
fail_alloc:
if (udc_regs)
......
drivers/scsi/t128.c
浏览文件 @ 60539fa3
......@@ -68,14 +68,11 @@
* 15 9-11
*/
#include <linux/signal.h>
#include <linux/io.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include "t128.h"
......@@ -126,7 +123,7 @@ static struct signature {
static int __init t128_setup(char *str)
{
static int commandline_current = 0;
static int commandline_current;
int i;
int ints[10];
......@@ -165,7 +162,7 @@ __setup("t128=", t128_setup);
static int __init t128_detect(struct scsi_host_template *tpnt)
{
static int current_override = 0, current_base = 0;
static int current_override, current_base;
struct Scsi_Host *instance;
unsigned long base;
void __iomem *p;
......@@ -182,9 +179,8 @@ static int __init t128_detect(struct scsi_host_template *tpnt)
base = 0;
} else
for (; !base && (current_base < NO_BASES); ++current_base) {
#if (TDEBUG & TDEBUG_INIT)
printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
#endif
dprintk(NDEBUG_INIT, "t128: probing address 0x%08x\n",
bases[current_base].address);
if (bases[current_base].noauto)
continue;
p = ioremap(bases[current_base].address, 0x2000);
......@@ -195,17 +191,13 @@ static int __init t128_detect(struct scsi_host_template *tpnt)
signatures[sig].string,
strlen(signatures[sig].string))) {
base = bases[current_base].address;
#if (TDEBUG & TDEBUG_INIT)
printk("scsi-t128 : detected board.\n");
#endif
dprintk(NDEBUG_INIT, "t128: detected board\n");
goto found;
}
iounmap(p);
}
#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
printk("scsi-t128 : base = %08x\n", (unsigned int) base);
#endif
dprintk(NDEBUG_INIT, "t128: base = 0x%08x\n", (unsigned int)base);
if (!base)
break;
......@@ -213,12 +205,15 @@ static int __init t128_detect(struct scsi_host_template *tpnt)
found:
instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
if(instance == NULL)
break;
goto out_unmap;
instance->base = base;
((struct NCR5380_hostdata *)instance->hostdata)->base = p;
NCR5380_init(instance, 0);
if (NCR5380_init(instance, 0))
goto out_unregister;
NCR5380_maybe_reset_bus(instance);
if (overrides[current_override].irq != IRQ_AUTO)
instance->irq = overrides[current_override].irq;
......@@ -242,27 +237,30 @@ static int __init t128_detect(struct scsi_host_template *tpnt)
printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
}
#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
#endif
dprintk(NDEBUG_INIT, "scsi%d: irq = %d\n",
instance->host_no, instance->irq);
++current_override;
++count;
}
return count;
out_unregister:
scsi_unregister(instance);
out_unmap:
iounmap(p);
return count;
}
static int t128_release(struct Scsi_Host *shost)
{
NCR5380_local_declare();
NCR5380_setup(shost);
struct NCR5380_hostdata *hostdata = shost_priv(shost);
if (shost->irq != NO_IRQ)
free_irq(shost->irq, shost);
NCR5380_exit(shost);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
iounmap(base);
iounmap(hostdata->base);
return 0;
}
......@@ -308,14 +306,14 @@ static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
* timeout.
*/
static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
int len) {
NCR5380_local_declare();
void __iomem *reg;
static inline int
NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
void __iomem *reg, *base = hostdata->base;
unsigned char *d = dst;
register int i = len;
NCR5380_setup(instance);
reg = base + T_DATA_REG_OFFSET;
#if 0
......@@ -354,14 +352,14 @@ static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
* timeout.
*/
static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
int len) {
NCR5380_local_declare();
void __iomem *reg;
static inline int
NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
void __iomem *reg, *base = hostdata->base;
unsigned char *s = src;
register int i = len;
NCR5380_setup(instance);
reg = base + T_DATA_REG_OFFSET;
#if 0
......@@ -403,10 +401,12 @@ static struct scsi_host_template driver_template = {
.eh_abort_handler = t128_abort,
.eh_bus_reset_handler = t128_bus_reset,
.bios_param = t128_biosparam,
.can_queue = CAN_QUEUE,
.can_queue = 32,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
#include "scsi_module.c"
drivers/scsi/t128.h
浏览文件 @ 60539fa3
......@@ -23,10 +23,6 @@
#ifndef T128_H
#define T128_H
#define TDEBUG 0
#define TDEBUG_INIT 0x1
#define TDEBUG_TRANSFER 0x2
/*
* The trantor boards are memory mapped. They use an NCR5380 or
* equivalent (my sample board had part second sourced from ZILOG).
......@@ -71,44 +67,18 @@
#define T_DATA_REG_OFFSET 0x1e00 /* rw 512 bytes long */
#ifndef ASM
#ifndef CMD_PER_LUN
#define CMD_PER_LUN 2
#endif
#ifndef CAN_QUEUE
#define CAN_QUEUE 32
#endif
#define NCR5380_implementation_fields \
void __iomem *base
#define NCR5380_local_declare() \
void __iomem *base
#define NCR5380_setup(instance) \
base = ((struct NCR5380_hostdata *)(instance->hostdata))->base
#define T128_address(reg) \
(((struct NCR5380_hostdata *)shost_priv(instance))->base + T_5380_OFFSET + ((reg) * 0x20))
#define T128_address(reg) (base + T_5380_OFFSET + ((reg) * 0x20))
#if !(TDEBUG & TDEBUG_TRANSFER)
#define NCR5380_read(reg) readb(T128_address(reg))
#define NCR5380_write(reg, value) writeb((value),(T128_address(reg)))
#else
#define NCR5380_read(reg) \
(((unsigned char) printk("scsi%d : read register %d at address %08x\n"\
, instance->hostno, (reg), T128_address(reg))), readb(T128_address(reg)))
#define NCR5380_write(reg, value) { \
printk("scsi%d : write %02x to register %d at address %08x\n", \
instance->hostno, (value), (reg), T128_address(reg)); \
writeb((value), (T128_address(reg))); \
}
#endif
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr t128_intr
#define do_NCR5380_intr do_t128_intr
#define NCR5380_queue_command t128_queue_command
#define NCR5380_abort t128_abort
#define NCR5380_bus_reset t128_bus_reset
......@@ -121,5 +91,4 @@
#define T128_IRQS 0xc4a8
#endif /* ndef ASM */
#endif /* T128_H */
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