提交 7a5ac8de 编写于 作者: L Linus Torvalds

Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  pata_ali: disable ATAPI DMA
  libata: ATA_12/16 doesn't fall into ATAPI_MISC
  libata: uninline atapi_cmd_type()
  libata: fix IDENTIFY order in ata_bus_probe()
......@@ -325,6 +325,44 @@ static void ata_force_horkage(struct ata_device *dev)
}
}
/**
* atapi_cmd_type - Determine ATAPI command type from SCSI opcode
* @opcode: SCSI opcode
*
* Determine ATAPI command type from @opcode.
*
* LOCKING:
* None.
*
* RETURNS:
* ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
*/
int atapi_cmd_type(u8 opcode)
{
switch (opcode) {
case GPCMD_READ_10:
case GPCMD_READ_12:
return ATAPI_READ;
case GPCMD_WRITE_10:
case GPCMD_WRITE_12:
case GPCMD_WRITE_AND_VERIFY_10:
return ATAPI_WRITE;
case GPCMD_READ_CD:
case GPCMD_READ_CD_MSF:
return ATAPI_READ_CD;
case ATA_16:
case ATA_12:
if (atapi_passthru16)
return ATAPI_PASS_THRU;
/* fall thru */
default:
return ATAPI_MISC;
}
}
/**
* ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
* @tf: Taskfile to convert
......@@ -2660,7 +2698,7 @@ int ata_bus_probe(struct ata_port *ap)
specific sequence bass-ackwards so that PDIAG- is released by
the slave device */
ata_link_for_each_dev(dev, &ap->link) {
ata_link_for_each_dev_reverse(dev, &ap->link) {
if (tries[dev->devno])
dev->class = classes[dev->devno];
......@@ -7774,6 +7812,7 @@ EXPORT_SYMBOL_GPL(ata_tf_read);
EXPORT_SYMBOL_GPL(ata_noop_dev_select);
EXPORT_SYMBOL_GPL(ata_std_dev_select);
EXPORT_SYMBOL_GPL(sata_print_link_status);
EXPORT_SYMBOL_GPL(atapi_cmd_type);
EXPORT_SYMBOL_GPL(ata_tf_to_fis);
EXPORT_SYMBOL_GPL(ata_tf_from_fis);
EXPORT_SYMBOL_GPL(ata_pack_xfermask);
......
......@@ -36,6 +36,10 @@
#define DRV_NAME "pata_ali"
#define DRV_VERSION "0.7.5"
int ali_atapi_dma = 0;
module_param_named(atapi_dma, ali_atapi_dma, int, 0644);
MODULE_PARM_DESC(atapi_dma, "Enable ATAPI DMA (0=disable, 1=enable)");
/*
* Cable special cases
*/
......@@ -269,6 +273,27 @@ static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
}
}
/**
* ali_warn_atapi_dma - Warn about ATAPI DMA disablement
* @adev: Device
*
* Whine about ATAPI DMA disablement if @adev is an ATAPI device.
* Can be used as ->dev_config.
*/
static void ali_warn_atapi_dma(struct ata_device *adev)
{
struct ata_eh_context *ehc = &adev->link->eh_context;
int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
if (print_info && adev->class == ATA_DEV_ATAPI && !ali_atapi_dma) {
ata_dev_printk(adev, KERN_WARNING,
"WARNING: ATAPI DMA disabled for reliablity issues. It can be enabled\n");
ata_dev_printk(adev, KERN_WARNING,
"WARNING: via pata_ali.atapi_dma modparam or corresponding sysfs node.\n");
}
}
/**
* ali_lock_sectors - Keep older devices to 255 sector mode
* @adev: Device
......@@ -283,6 +308,7 @@ static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
static void ali_lock_sectors(struct ata_device *adev)
{
adev->max_sectors = 255;
ali_warn_atapi_dma(adev);
}
/**
......@@ -294,6 +320,18 @@ static void ali_lock_sectors(struct ata_device *adev)
static int ali_check_atapi_dma(struct ata_queued_cmd *qc)
{
if (!ali_atapi_dma) {
/* FIXME: pata_ali can't do ATAPI DMA reliably but the
* IDE alim15x3 driver can. I tried lots of things
* but couldn't find what the actual difference was.
* If you got an idea, please write it to
* linux-ide@vger.kernel.org and cc htejun@gmail.com.
*
* Disable ATAPI DMA for now.
*/
return -EOPNOTSUPP;
}
/* If its not a media command, its not worth it */
if (atapi_cmd_type(qc->cdb[0]) == ATAPI_MISC)
return -EOPNOTSUPP;
......@@ -359,6 +397,7 @@ static struct ata_port_operations ali_20_port_ops = {
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_atapi_dma = ali_check_atapi_dma,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
......@@ -438,6 +477,7 @@ static struct ata_port_operations ali_c5_port_ops = {
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.dev_config = ali_warn_atapi_dma,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
......
......@@ -350,7 +350,8 @@ enum {
ATAPI_READ = 0, /* READs */
ATAPI_WRITE = 1, /* WRITEs */
ATAPI_READ_CD = 2, /* READ CD [MSF] */
ATAPI_MISC = 3, /* the rest */
ATAPI_PASS_THRU = 3, /* SAT pass-thru */
ATAPI_MISC = 4, /* the rest */
};
enum ata_xfer_mask {
......@@ -849,6 +850,7 @@ extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
*/
extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
extern int atapi_cmd_type(u8 opcode);
extern void ata_tf_to_fis(const struct ata_taskfile *tf,
u8 pmp, int is_cmd, u8 *fis);
extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
......@@ -1379,27 +1381,6 @@ static inline int ata_try_flush_cache(const struct ata_device *dev)
ata_id_has_flush_ext(dev->id);
}
static inline int atapi_cmd_type(u8 opcode)
{
switch (opcode) {
case GPCMD_READ_10:
case GPCMD_READ_12:
return ATAPI_READ;
case GPCMD_WRITE_10:
case GPCMD_WRITE_12:
case GPCMD_WRITE_AND_VERIFY_10:
return ATAPI_WRITE;
case GPCMD_READ_CD:
case GPCMD_READ_CD_MSF:
return ATAPI_READ_CD;
default:
return ATAPI_MISC;
}
}
static inline unsigned int ac_err_mask(u8 status)
{
if (status & (ATA_BUSY | ATA_DRQ))
......
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