提交 9d92a7e1 编写于 作者: C Cornelia Huck 提交者: Heiko Carstens

[S390] cio: Add chsc subchannel driver.

This patch adds a driver for subchannels of type chsc.

A device /dev/chsc is created which may be used to issue ioctls to:
- obtain information about the machine's I/O configuration
- dynamically change the machine's I/O configuration via
  asynchronous chsc commands
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
上级 683c5418
......@@ -117,6 +117,7 @@ Code Seq# Include File Comments
<mailto:natalia@nikhefk.nikhef.nl>
'c' 00-7F linux/comstats.h conflict!
'c' 00-7F linux/coda.h conflict!
'c' 80-9F asm-s390/chsc.h
'd' 00-FF linux/char/drm/drm/h conflict!
'd' 00-DF linux/video_decoder.h conflict!
'd' F0-FF linux/digi1.h
......
......@@ -345,6 +345,22 @@ config QDIO_DEBUG
If unsure, say N.
config CHSC_SCH
tristate "Support for CHSC subchannels"
help
This driver allows usage of CHSC subchannels. A CHSC subchannel
is usually present on LPAR only.
The driver creates a device /dev/chsc, which may be used to
obtain I/O configuration information about the machine and
to issue asynchronous chsc commands (DANGEROUS).
You will usually only want to use this interface on a special
LPAR designated for system management.
To compile this driver as a module, choose M here: the
module will be called chsc_sch.
If unsure, say N.
comment "Misc"
config IPL
......
......@@ -7,5 +7,6 @@ obj-y += airq.o blacklist.o chsc.o cio.o css.o chp.o idset.o isc.o scsw.o \
ccw_device-objs += device.o device_fsm.o device_ops.o
ccw_device-objs += device_id.o device_pgid.o device_status.o
obj-y += ccw_device.o cmf.o
obj-$(CONFIG_CHSC_SCH) += chsc_sch.o
obj-$(CONFIG_CCWGROUP) += ccwgroup.o
obj-$(CONFIG_QDIO) += qdio.o
......@@ -407,7 +407,7 @@ int chp_new(struct chp_id chpid)
chpid.id);
/* Obtain channel path description and fill it in. */
ret = chsc_determine_channel_path_description(chpid, &chp->desc);
ret = chsc_determine_base_channel_path_desc(chpid, &chp->desc);
if (ret)
goto out_free;
if ((chp->desc.flags & 0x80) == 0) {
......
......@@ -15,6 +15,7 @@
#include <asm/cio.h>
#include <asm/chpid.h>
#include <asm/chsc.h>
#include "../s390mach.h"
#include "css.h"
......@@ -627,23 +628,33 @@ chsc_secm(struct channel_subsystem *css, int enable)
return ret;
}
int chsc_determine_channel_path_description(struct chp_id chpid,
struct channel_path_desc *desc)
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
int c, int m,
struct chsc_response_struct *resp)
{
int ccode, ret;
struct {
struct chsc_header request;
u32 : 24;
u32 : 2;
u32 m : 1;
u32 c : 1;
u32 fmt : 4;
u32 cssid : 8;
u32 : 4;
u32 rfmt : 4;
u32 first_chpid : 8;
u32 : 24;
u32 last_chpid : 8;
u32 zeroes1;
struct chsc_header response;
u32 zeroes2;
struct channel_path_desc desc;
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *scpd_area;
if ((rfmt == 1) && !css_general_characteristics.fcs)
return -EINVAL;
if ((rfmt == 2) && !css_general_characteristics.cib)
return -EINVAL;
scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!scpd_area)
return -ENOMEM;
......@@ -651,8 +662,13 @@ int chsc_determine_channel_path_description(struct chp_id chpid,
scpd_area->request.length = 0x0010;
scpd_area->request.code = 0x0002;
scpd_area->cssid = chpid.cssid;
scpd_area->first_chpid = chpid.id;
scpd_area->last_chpid = chpid.id;
scpd_area->m = m;
scpd_area->c = c;
scpd_area->fmt = fmt;
scpd_area->rfmt = rfmt;
ccode = chsc(scpd_area);
if (ccode > 0) {
......@@ -663,8 +679,7 @@ int chsc_determine_channel_path_description(struct chp_id chpid,
ret = chsc_error_from_response(scpd_area->response.code);
if (ret == 0)
/* Success. */
memcpy(desc, &scpd_area->desc,
sizeof(struct channel_path_desc));
memcpy(resp, &scpd_area->response, scpd_area->response.length);
else
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
scpd_area->response.code);
......@@ -672,6 +687,25 @@ int chsc_determine_channel_path_description(struct chp_id chpid,
free_page((unsigned long)scpd_area);
return ret;
}
EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
int chsc_determine_base_channel_path_desc(struct chp_id chpid,
struct channel_path_desc *desc)
{
struct chsc_response_struct *chsc_resp;
int ret;
chsc_resp = kzalloc(sizeof(*chsc_resp), GFP_KERNEL);
if (!chsc_resp)
return -ENOMEM;
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp);
if (ret)
goto out_free;
memcpy(desc, &chsc_resp->data, chsc_resp->length);
out_free:
kfree(chsc_resp);
return ret;
}
static void
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
......
......@@ -4,7 +4,8 @@
#include <linux/types.h>
#include <linux/device.h>
#include <asm/chpid.h>
#include "schid.h"
#include <asm/chsc.h>
#include <asm/schid.h>
#define CHSC_SDA_OC_MSS 0x2
......@@ -37,11 +38,14 @@ struct channel_path_desc {
struct channel_path;
struct css_general_char {
u64 : 41;
u64 : 12;
u32 dynio : 1; /* bit 12 */
u32 : 28;
u32 aif : 1; /* bit 41 */
u32 : 3;
u32 mcss : 1; /* bit 45 */
u32 : 2;
u32 fcs : 1; /* bit 46 */
u32 : 1;
u32 ext_mb : 1; /* bit 48 */
u32 : 7;
u32 aif_tdd : 1; /* bit 56 */
......@@ -49,7 +53,9 @@ struct css_general_char {
u32 qebsm : 1; /* bit 58 */
u32 : 8;
u32 aif_osa : 1; /* bit 67 */
u32 : 20;
u32 : 14;
u32 cib : 1; /* bit 82 */
u32 : 5;
u32 fcx : 1; /* bit 88 */
u32 : 7;
}__attribute__((packed));
......@@ -86,8 +92,11 @@ struct channel_subsystem;
extern int chsc_secm(struct channel_subsystem *, int);
int chsc_chp_vary(struct chp_id chpid, int on);
int chsc_determine_channel_path_description(struct chp_id chpid,
struct channel_path_desc *desc);
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
int c, int m,
struct chsc_response_struct *resp);
int chsc_determine_base_channel_path_desc(struct chp_id chpid,
struct channel_path_desc *desc);
void chsc_chp_online(struct chp_id chpid);
void chsc_chp_offline(struct chp_id chpid);
int chsc_get_channel_measurement_chars(struct channel_path *chp);
......
/*
* Driver for s390 chsc subchannels
*
* Copyright IBM Corp. 2008
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <asm/cio.h>
#include <asm/chsc.h>
#include <asm/isc.h>
#include "cio.h"
#include "cio_debug.h"
#include "css.h"
#include "chsc_sch.h"
#include "ioasm.h"
static debug_info_t *chsc_debug_msg_id;
static debug_info_t *chsc_debug_log_id;
#define CHSC_MSG(imp, args...) do { \
debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \
} while (0)
#define CHSC_LOG(imp, txt) do { \
debug_text_event(chsc_debug_log_id, imp , txt); \
} while (0)
static void CHSC_LOG_HEX(int level, void *data, int length)
{
while (length > 0) {
debug_event(chsc_debug_log_id, level, data, length);
length -= chsc_debug_log_id->buf_size;
data += chsc_debug_log_id->buf_size;
}
}
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("driver for s390 chsc subchannels");
MODULE_LICENSE("GPL");
static void chsc_subchannel_irq(struct subchannel *sch)
{
struct chsc_private *private = sch->private;
struct chsc_request *request = private->request;
struct irb *irb = (struct irb *)__LC_IRB;
CHSC_LOG(4, "irb");
CHSC_LOG_HEX(4, irb, sizeof(*irb));
/* Copy irb to provided request and set done. */
if (!request) {
CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
sch->schid.ssid, sch->schid.sch_no);
return;
}
private->request = NULL;
memcpy(&request->irb, irb, sizeof(*irb));
stsch(sch->schid, &sch->schib);
complete(&request->completion);
put_device(&sch->dev);
}
static int chsc_subchannel_probe(struct subchannel *sch)
{
struct chsc_private *private;
int ret;
CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n",
sch->schid.ssid, sch->schid.sch_no);
sch->isc = CHSC_SCH_ISC;
private = kzalloc(sizeof(*private), GFP_KERNEL);
if (!private)
return -ENOMEM;
ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
if (ret) {
CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
sch->schid.ssid, sch->schid.sch_no, ret);
kfree(private);
} else {
sch->private = private;
if (sch->dev.uevent_suppress) {
sch->dev.uevent_suppress = 0;
kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
}
}
return ret;
}
static int chsc_subchannel_remove(struct subchannel *sch)
{
struct chsc_private *private;
cio_disable_subchannel(sch);
private = sch->private;
sch->private = NULL;
if (private->request) {
complete(&private->request->completion);
put_device(&sch->dev);
}
kfree(private);
return 0;
}
static void chsc_subchannel_shutdown(struct subchannel *sch)
{
cio_disable_subchannel(sch);
}
static struct css_device_id chsc_subchannel_ids[] = {
{ .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(css, chsc_subchannel_ids);
static struct css_driver chsc_subchannel_driver = {
.owner = THIS_MODULE,
.subchannel_type = chsc_subchannel_ids,
.irq = chsc_subchannel_irq,
.probe = chsc_subchannel_probe,
.remove = chsc_subchannel_remove,
.shutdown = chsc_subchannel_shutdown,
.name = "chsc_subchannel",
};
static int __init chsc_init_dbfs(void)
{
chsc_debug_msg_id = debug_register("chsc_msg", 16, 1,
16 * sizeof(long));
if (!chsc_debug_msg_id)
goto out;
debug_register_view(chsc_debug_msg_id, &debug_sprintf_view);
debug_set_level(chsc_debug_msg_id, 2);
chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16);
if (!chsc_debug_log_id)
goto out;
debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view);
debug_set_level(chsc_debug_log_id, 2);
return 0;
out:
if (chsc_debug_msg_id)
debug_unregister(chsc_debug_msg_id);
return -ENOMEM;
}
static void chsc_remove_dbfs(void)
{
debug_unregister(chsc_debug_log_id);
debug_unregister(chsc_debug_msg_id);
}
static int __init chsc_init_sch_driver(void)
{
return css_driver_register(&chsc_subchannel_driver);
}
static void chsc_cleanup_sch_driver(void)
{
css_driver_unregister(&chsc_subchannel_driver);
}
static DEFINE_SPINLOCK(chsc_lock);
static int chsc_subchannel_match_next_free(struct device *dev, void *data)
{
struct subchannel *sch = to_subchannel(dev);
return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw);
}
static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch)
{
struct device *dev;
dev = driver_find_device(&chsc_subchannel_driver.drv,
sch ? &sch->dev : NULL, NULL,
chsc_subchannel_match_next_free);
return dev ? to_subchannel(dev) : NULL;
}
/**
* chsc_async() - try to start a chsc request asynchronously
* @chsc_area: request to be started
* @request: request structure to associate
*
* Tries to start a chsc request on one of the existing chsc subchannels.
* Returns:
* %0 if the request was performed synchronously
* %-EINPROGRESS if the request was successfully started
* %-EBUSY if all chsc subchannels are busy
* %-ENODEV if no chsc subchannels are available
* Context:
* interrupts disabled, chsc_lock held
*/
static int chsc_async(struct chsc_async_area *chsc_area,
struct chsc_request *request)
{
int cc;
struct chsc_private *private;
struct subchannel *sch = NULL;
int ret = -ENODEV;
char dbf[10];
chsc_area->header.key = PAGE_DEFAULT_KEY;
while ((sch = chsc_get_next_subchannel(sch))) {
spin_lock(sch->lock);
private = sch->private;
if (private->request) {
spin_unlock(sch->lock);
ret = -EBUSY;
continue;
}
chsc_area->header.sid = sch->schid;
CHSC_LOG(2, "schid");
CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid));
cc = chsc(chsc_area);
sprintf(dbf, "cc:%d", cc);
CHSC_LOG(2, dbf);
switch (cc) {
case 0:
ret = 0;
break;
case 1:
sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC;
ret = -EINPROGRESS;
private->request = request;
break;
case 2:
ret = -EBUSY;
break;
default:
ret = -ENODEV;
}
spin_unlock(sch->lock);
CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
sch->schid.ssid, sch->schid.sch_no, cc);
if (ret == -EINPROGRESS)
return -EINPROGRESS;
put_device(&sch->dev);
if (ret == 0)
return 0;
}
return ret;
}
static void chsc_log_command(struct chsc_async_area *chsc_area)
{
char dbf[10];
sprintf(dbf, "CHSC:%x", chsc_area->header.code);
CHSC_LOG(0, dbf);
CHSC_LOG_HEX(0, chsc_area, 32);
}
static int chsc_examine_irb(struct chsc_request *request)
{
int backed_up;
if (!scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)
return -EIO;
backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK;
request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK;
if (scsw_cstat(&request->irb.scsw) == 0)
return 0;
if (!backed_up)
return 0;
if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK)
return -EIO;
if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK)
return -EPERM;
if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK)
return -EAGAIN;
if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK)
return -EAGAIN;
return -EIO;
}
static int chsc_ioctl_start(void __user *user_area)
{
struct chsc_request *request;
struct chsc_async_area *chsc_area;
int ret;
char dbf[10];
if (!css_general_characteristics.dynio)
/* It makes no sense to try. */
return -EOPNOTSUPP;
chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
if (!chsc_area)
return -ENOMEM;
request = kzalloc(sizeof(*request), GFP_KERNEL);
if (!request) {
ret = -ENOMEM;
goto out_free;
}
init_completion(&request->completion);
if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
ret = -EFAULT;
goto out_free;
}
chsc_log_command(chsc_area);
spin_lock_irq(&chsc_lock);
ret = chsc_async(chsc_area, request);
spin_unlock_irq(&chsc_lock);
if (ret == -EINPROGRESS) {
wait_for_completion(&request->completion);
ret = chsc_examine_irb(request);
}
/* copy area back to user */
if (!ret)
if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
ret = -EFAULT;
out_free:
sprintf(dbf, "ret:%d", ret);
CHSC_LOG(0, dbf);
kfree(request);
free_page((unsigned long)chsc_area);
return ret;
}
static int chsc_ioctl_info_channel_path(void __user *user_cd)
{
struct chsc_chp_cd *cd;
int ret, ccode;
struct {
struct chsc_header request;
u32 : 2;
u32 m : 1;
u32 : 1;
u32 fmt1 : 4;
u32 cssid : 8;
u32 : 8;
u32 first_chpid : 8;
u32 : 24;
u32 last_chpid : 8;
u32 : 32;
struct chsc_header response;
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *scpcd_area;
scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!scpcd_area)
return -ENOMEM;
cd = kzalloc(sizeof(*cd), GFP_KERNEL);
if (!cd) {
ret = -ENOMEM;
goto out_free;
}
if (copy_from_user(cd, user_cd, sizeof(*cd))) {
ret = -EFAULT;
goto out_free;
}
scpcd_area->request.length = 0x0010;
scpcd_area->request.code = 0x0028;
scpcd_area->m = cd->m;
scpcd_area->fmt1 = cd->fmt;
scpcd_area->cssid = cd->chpid.cssid;
scpcd_area->first_chpid = cd->chpid.id;
scpcd_area->last_chpid = cd->chpid.id;
ccode = chsc(scpcd_area);
if (ccode != 0) {
ret = -EIO;
goto out_free;
}
if (scpcd_area->response.code != 0x0001) {
ret = -EIO;
CHSC_MSG(0, "scpcd: response code=%x\n",
scpcd_area->response.code);
goto out_free;
}
memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length);
if (copy_to_user(user_cd, cd, sizeof(*cd)))
ret = -EFAULT;
else
ret = 0;
out_free:
kfree(cd);
free_page((unsigned long)scpcd_area);
return ret;
}
static int chsc_ioctl_info_cu(void __user *user_cd)
{
struct chsc_cu_cd *cd;
int ret, ccode;
struct {
struct chsc_header request;
u32 : 2;
u32 m : 1;
u32 : 1;
u32 fmt1 : 4;
u32 cssid : 8;
u32 : 8;
u32 first_cun : 8;
u32 : 24;
u32 last_cun : 8;
u32 : 32;
struct chsc_header response;
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *scucd_area;
scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!scucd_area)
return -ENOMEM;
cd = kzalloc(sizeof(*cd), GFP_KERNEL);
if (!cd) {
ret = -ENOMEM;
goto out_free;
}
if (copy_from_user(cd, user_cd, sizeof(*cd))) {
ret = -EFAULT;
goto out_free;
}
scucd_area->request.length = 0x0010;
scucd_area->request.code = 0x0028;
scucd_area->m = cd->m;
scucd_area->fmt1 = cd->fmt;
scucd_area->cssid = cd->cssid;
scucd_area->first_cun = cd->cun;
scucd_area->last_cun = cd->cun;
ccode = chsc(scucd_area);
if (ccode != 0) {
ret = -EIO;
goto out_free;
}
if (scucd_area->response.code != 0x0001) {
ret = -EIO;
CHSC_MSG(0, "scucd: response code=%x\n",
scucd_area->response.code);
goto out_free;
}
memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length);
if (copy_to_user(user_cd, cd, sizeof(*cd)))
ret = -EFAULT;
else
ret = 0;
out_free:
kfree(cd);
free_page((unsigned long)scucd_area);
return ret;
}
static int chsc_ioctl_info_sch_cu(void __user *user_cud)
{
struct chsc_sch_cud *cud;
int ret, ccode;
struct {
struct chsc_header request;
u32 : 2;
u32 m : 1;
u32 : 5;
u32 fmt1 : 4;
u32 : 2;
u32 ssid : 2;
u32 first_sch : 16;
u32 : 8;
u32 cssid : 8;
u32 last_sch : 16;
u32 : 32;
struct chsc_header response;
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *sscud_area;
sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sscud_area)
return -ENOMEM;
cud = kzalloc(sizeof(*cud), GFP_KERNEL);
if (!cud) {
ret = -ENOMEM;
goto out_free;
}
if (copy_from_user(cud, user_cud, sizeof(*cud))) {
ret = -EFAULT;
goto out_free;
}
sscud_area->request.length = 0x0010;
sscud_area->request.code = 0x0006;
sscud_area->m = cud->schid.m;
sscud_area->fmt1 = cud->fmt;
sscud_area->ssid = cud->schid.ssid;
sscud_area->first_sch = cud->schid.sch_no;
sscud_area->cssid = cud->schid.cssid;
sscud_area->last_sch = cud->schid.sch_no;
ccode = chsc(sscud_area);
if (ccode != 0) {
ret = -EIO;
goto out_free;
}
if (sscud_area->response.code != 0x0001) {
ret = -EIO;
CHSC_MSG(0, "sscud: response code=%x\n",
sscud_area->response.code);
goto out_free;
}
memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length);
if (copy_to_user(user_cud, cud, sizeof(*cud)))
ret = -EFAULT;
else
ret = 0;
out_free:
kfree(cud);
free_page((unsigned long)sscud_area);
return ret;
}
static int chsc_ioctl_conf_info(void __user *user_ci)
{
struct chsc_conf_info *ci;
int ret, ccode;
struct {
struct chsc_header request;
u32 : 2;
u32 m : 1;
u32 : 1;
u32 fmt1 : 4;
u32 cssid : 8;
u32 : 6;
u32 ssid : 2;
u32 : 8;
u64 : 64;
struct chsc_header response;
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *sci_area;
sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sci_area)
return -ENOMEM;
ci = kzalloc(sizeof(*ci), GFP_KERNEL);
if (!ci) {
ret = -ENOMEM;
goto out_free;
}
if (copy_from_user(ci, user_ci, sizeof(*ci))) {
ret = -EFAULT;
goto out_free;
}
sci_area->request.length = 0x0010;
sci_area->request.code = 0x0012;
sci_area->m = ci->id.m;
sci_area->fmt1 = ci->fmt;
sci_area->cssid = ci->id.cssid;
sci_area->ssid = ci->id.ssid;
ccode = chsc(sci_area);
if (ccode != 0) {
ret = -EIO;
goto out_free;
}
if (sci_area->response.code != 0x0001) {
ret = -EIO;
CHSC_MSG(0, "sci: response code=%x\n",
sci_area->response.code);
goto out_free;
}
memcpy(&ci->scid, &sci_area->response, sci_area->response.length);
if (copy_to_user(user_ci, ci, sizeof(*ci)))
ret = -EFAULT;
else
ret = 0;
out_free:
kfree(ci);
free_page((unsigned long)sci_area);
return ret;
}
static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
{
struct chsc_comp_list *ccl;
int ret, ccode;
struct {
struct chsc_header request;
u32 ctype : 8;
u32 : 4;
u32 fmt : 4;
u32 : 16;
u64 : 64;
u32 list_parm[2];
u64 : 64;
struct chsc_header response;
u8 data[PAGE_SIZE - 36];
} __attribute__ ((packed)) *sccl_area;
struct {
u32 m : 1;
u32 : 31;
u32 cssid : 8;
u32 : 16;
u32 chpid : 8;
} __attribute__ ((packed)) *chpid_parm;
struct {
u32 f_cssid : 8;
u32 l_cssid : 8;
u32 : 16;
u32 res;
} __attribute__ ((packed)) *cssids_parm;
sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sccl_area)
return -ENOMEM;
ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
if (!ccl) {
ret = -ENOMEM;
goto out_free;
}
if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) {
ret = -EFAULT;
goto out_free;
}
sccl_area->request.length = 0x0020;
sccl_area->request.code = 0x0030;
sccl_area->fmt = ccl->req.fmt;
sccl_area->ctype = ccl->req.ctype;
switch (sccl_area->ctype) {
case CCL_CU_ON_CHP:
case CCL_IOP_CHP:
chpid_parm = (void *)&sccl_area->list_parm;
chpid_parm->m = ccl->req.chpid.m;
chpid_parm->cssid = ccl->req.chpid.chp.cssid;
chpid_parm->chpid = ccl->req.chpid.chp.id;
break;
case CCL_CSS_IMG:
case CCL_CSS_IMG_CONF_CHAR:
cssids_parm = (void *)&sccl_area->list_parm;
cssids_parm->f_cssid = ccl->req.cssids.f_cssid;
cssids_parm->l_cssid = ccl->req.cssids.l_cssid;
break;
}
ccode = chsc(sccl_area);
if (ccode != 0) {
ret = -EIO;
goto out_free;
}
if (sccl_area->response.code != 0x0001) {
ret = -EIO;
CHSC_MSG(0, "sccl: response code=%x\n",
sccl_area->response.code);
goto out_free;
}
memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length);
if (copy_to_user(user_ccl, ccl, sizeof(*ccl)))
ret = -EFAULT;
else
ret = 0;
out_free:
kfree(ccl);
free_page((unsigned long)sccl_area);
return ret;
}
static int chsc_ioctl_chpd(void __user *user_chpd)
{
struct chsc_cpd_info *chpd;
int ret;
chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
if (!chpd)
return -ENOMEM;
if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) {
ret = -EFAULT;
goto out_free;
}
ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt,
chpd->rfmt, chpd->c, chpd->m,
&chpd->chpdb);
if (ret)
goto out_free;
if (copy_to_user(user_chpd, chpd, sizeof(*chpd)))
ret = -EFAULT;
out_free:
kfree(chpd);
return ret;
}
static int chsc_ioctl_dcal(void __user *user_dcal)
{
struct chsc_dcal *dcal;
int ret, ccode;
struct {
struct chsc_header request;
u32 atype : 8;
u32 : 4;
u32 fmt : 4;
u32 : 16;
u32 res0[2];
u32 list_parm[2];
u32 res1[2];
struct chsc_header response;
u8 data[PAGE_SIZE - 36];
} __attribute__ ((packed)) *sdcal_area;
sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sdcal_area)
return -ENOMEM;
dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
if (!dcal) {
ret = -ENOMEM;
goto out_free;
}
if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) {
ret = -EFAULT;
goto out_free;
}
sdcal_area->request.length = 0x0020;
sdcal_area->request.code = 0x0034;
sdcal_area->atype = dcal->req.atype;
sdcal_area->fmt = dcal->req.fmt;
memcpy(&sdcal_area->list_parm, &dcal->req.list_parm,
sizeof(sdcal_area->list_parm));
ccode = chsc(sdcal_area);
if (ccode != 0) {
ret = -EIO;
goto out_free;
}
if (sdcal_area->response.code != 0x0001) {
ret = -EIO;
CHSC_MSG(0, "sdcal: response code=%x\n",
sdcal_area->response.code);
goto out_free;
}
memcpy(&dcal->sdcal, &sdcal_area->response,
sdcal_area->response.length);
if (copy_to_user(user_dcal, dcal, sizeof(*dcal)))
ret = -EFAULT;
else
ret = 0;
out_free:
kfree(dcal);
free_page((unsigned long)sdcal_area);
return ret;
}
static long chsc_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
switch (cmd) {
case CHSC_START:
return chsc_ioctl_start((void __user *)arg);
case CHSC_INFO_CHANNEL_PATH:
return chsc_ioctl_info_channel_path((void __user *)arg);
case CHSC_INFO_CU:
return chsc_ioctl_info_cu((void __user *)arg);
case CHSC_INFO_SCH_CU:
return chsc_ioctl_info_sch_cu((void __user *)arg);
case CHSC_INFO_CI:
return chsc_ioctl_conf_info((void __user *)arg);
case CHSC_INFO_CCL:
return chsc_ioctl_conf_comp_list((void __user *)arg);
case CHSC_INFO_CPD:
return chsc_ioctl_chpd((void __user *)arg);
case CHSC_INFO_DCAL:
return chsc_ioctl_dcal((void __user *)arg);
default: /* unknown ioctl number */
return -ENOIOCTLCMD;
}
}
static const struct file_operations chsc_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = chsc_ioctl,
.compat_ioctl = chsc_ioctl,
};
static struct miscdevice chsc_misc_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "chsc",
.fops = &chsc_fops,
};
static int __init chsc_misc_init(void)
{
return misc_register(&chsc_misc_device);
}
static void chsc_misc_cleanup(void)
{
misc_deregister(&chsc_misc_device);
}
static int __init chsc_sch_init(void)
{
int ret;
ret = chsc_init_dbfs();
if (ret)
return ret;
isc_register(CHSC_SCH_ISC);
ret = chsc_init_sch_driver();
if (ret)
goto out_dbf;
ret = chsc_misc_init();
if (ret)
goto out_driver;
return ret;
out_driver:
chsc_cleanup_sch_driver();
out_dbf:
isc_unregister(CHSC_SCH_ISC);
chsc_remove_dbfs();
return ret;
}
static void __exit chsc_sch_exit(void)
{
chsc_misc_cleanup();
chsc_cleanup_sch_driver();
isc_unregister(CHSC_SCH_ISC);
chsc_remove_dbfs();
}
module_init(chsc_sch_init);
module_exit(chsc_sch_exit);
#ifndef _CHSC_SCH_H
#define _CHSC_SCH_H
struct chsc_request {
struct completion completion;
struct irb irb;
};
struct chsc_private {
struct chsc_request *request;
};
#endif
......@@ -877,6 +877,12 @@ __clear_io_subchannel_easy(struct subchannel_id schid)
return -EBUSY;
}
static void __clear_chsc_subchannel_easy(void)
{
/* It seems we can only wait for a bit here :/ */
udelay_reset(100);
}
static int pgm_check_occured;
static void cio_reset_pgm_check_handler(void)
......@@ -920,6 +926,9 @@ static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
if (__clear_io_subchannel_easy(schid))
goto out; /* give up... */
break;
case SUBCHANNEL_TYPE_CHSC:
__clear_chsc_subchannel_easy();
break;
default:
/* No default clear strategy */
break;
......
......@@ -7,8 +7,8 @@
#include <asm/chpid.h>
#include <asm/cio.h>
#include <asm/fcx.h>
#include <asm/schid.h>
#include "chsc.h"
#include "schid.h"
/*
* path management control word
......
......@@ -9,8 +9,7 @@
#include <asm/cio.h>
#include <asm/chpid.h>
#include "schid.h"
#include <asm/schid.h>
/*
* path grouping stuff
......
......@@ -8,7 +8,7 @@
#ifndef S390_IDSET_H
#define S390_IDSET_H S390_IDSET_H
#include "schid.h"
#include <asm/schid.h>
struct idset;
......
#ifndef S390_IO_SCH_H
#define S390_IO_SCH_H
#include "schid.h"
#include <asm/schid.h>
/*
* command-mode operation request block
......
......@@ -2,7 +2,7 @@
#define S390_CIO_IOASM_H
#include <asm/chpid.h>
#include "schid.h"
#include <asm/schid.h>
/*
* TPI info structure
......
......@@ -3,8 +3,7 @@
#include <asm/page.h>
#include <asm/isc.h>
#include "schid.h"
#include <asm/schid.h>
#ifdef CONFIG_QDIO_DEBUG
#define QDIO_VERBOSE_LEVEL 9
......
......@@ -8,6 +8,9 @@ header-y += ucontext.h
header-y += vtoc.h
header-y += zcrypt.h
header-y += kvm.h
header-y += schid.h
header-y += chsc.h
unifdef-y += cmb.h
unifdef-y += debug.h
unifdef-y += chpid.h
......@@ -10,7 +10,6 @@
#include <linux/string.h>
#include <asm/types.h>
#include <asm/cio.h>
#define __MAX_CHPID 255
......@@ -41,6 +40,9 @@ static inline void chp_id_next(struct chp_id *chpid)
}
}
#ifdef __KERNEL__
#include <asm/cio.h>
static inline int chp_id_is_valid(struct chp_id *chpid)
{
return (chpid->cssid <= __MAX_CSSID);
......@@ -49,5 +51,6 @@ static inline int chp_id_is_valid(struct chp_id *chpid)
#define chp_id_for_each(c) \
for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
#endif /* __KERNEL */
#endif /* _ASM_S390_CHPID_H */
/*
* ioctl interface for /dev/chsc
*
* Copyright 2008 IBM Corp.
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*/
#ifndef _ASM_CHSC_H
#define _ASM_CHSC_H
#include <asm/chpid.h>
#include <asm/schid.h>
struct chsc_async_header {
__u16 length;
__u16 code;
__u32 cmd_dependend;
__u32 key : 4;
__u32 : 28;
struct subchannel_id sid;
} __attribute__ ((packed));
struct chsc_async_area {
struct chsc_async_header header;
__u8 data[PAGE_SIZE - 16 /* size of chsc_async_header */];
} __attribute__ ((packed));
struct chsc_response_struct {
__u16 length;
__u16 code;
__u32 parms;
__u8 data[PAGE_SIZE - 8];
} __attribute__ ((packed));
struct chsc_chp_cd {
struct chp_id chpid;
int m;
int fmt;
struct chsc_response_struct cpcb;
};
struct chsc_cu_cd {
__u16 cun;
__u8 cssid;
int m;
int fmt;
struct chsc_response_struct cucb;
};
struct chsc_sch_cud {
struct subchannel_id schid;
int fmt;
struct chsc_response_struct scub;
};
struct conf_id {
int m;
__u8 cssid;
__u8 ssid;
};
struct chsc_conf_info {
struct conf_id id;
int fmt;
struct chsc_response_struct scid;
};
struct ccl_parm_chpid {
int m;
struct chp_id chp;
};
struct ccl_parm_cssids {
__u8 f_cssid;
__u8 l_cssid;
};
struct chsc_comp_list {
struct {
enum {
CCL_CU_ON_CHP = 1,
CCL_CHP_TYPE_CAP = 2,
CCL_CSS_IMG = 4,
CCL_CSS_IMG_CONF_CHAR = 5,
CCL_IOP_CHP = 6,
} ctype;
int fmt;
struct ccl_parm_chpid chpid;
struct ccl_parm_cssids cssids;
} req;
struct chsc_response_struct sccl;
};
struct chsc_dcal {
struct {
enum {
DCAL_CSS_IID_PN = 4,
} atype;
__u32 list_parm[2];
int fmt;
} req;
struct chsc_response_struct sdcal;
};
struct chsc_cpd_info {
struct chp_id chpid;
int m;
int fmt;
int rfmt;
int c;
struct chsc_response_struct chpdb;
};
#define CHSC_IOCTL_MAGIC 'c'
#define CHSC_START _IOWR(CHSC_IOCTL_MAGIC, 0x81, struct chsc_async_area)
#define CHSC_INFO_CHANNEL_PATH _IOWR(CHSC_IOCTL_MAGIC, 0x82, \
struct chsc_chp_cd)
#define CHSC_INFO_CU _IOWR(CHSC_IOCTL_MAGIC, 0x83, struct chsc_cu_cd)
#define CHSC_INFO_SCH_CU _IOWR(CHSC_IOCTL_MAGIC, 0x84, struct chsc_sch_cud)
#define CHSC_INFO_CI _IOWR(CHSC_IOCTL_MAGIC, 0x85, struct chsc_conf_info)
#define CHSC_INFO_CCL _IOWR(CHSC_IOCTL_MAGIC, 0x86, struct chsc_comp_list)
#define CHSC_INFO_CPD _IOWR(CHSC_IOCTL_MAGIC, 0x87, struct chsc_cpd_info)
#define CHSC_INFO_DCAL _IOWR(CHSC_IOCTL_MAGIC, 0x88, struct chsc_dcal)
#endif
......@@ -14,6 +14,7 @@
/* Regular I/O interrupts. */
#define IO_SCH_ISC 3 /* regular I/O subchannels */
#define CONSOLE_ISC 1 /* console I/O subchannel */
#define CHSC_SCH_ISC 7 /* CHSC subchannels */
/* Adapter interrupts. */
#define QDIO_AIRQ_ISC IO_SCH_ISC /* I/O subchannel in qdio mode */
......
#ifndef S390_SCHID_H
#define S390_SCHID_H
#ifndef ASM_SCHID_H
#define ASM_SCHID_H
struct subchannel_id {
__u32 reserved:13;
__u32 ssid:2;
__u32 one:1;
__u32 sch_no:16;
} __attribute__ ((packed,aligned(4)));
__u32 cssid : 8;
__u32 : 4;
__u32 m : 1;
__u32 ssid : 2;
__u32 one : 1;
__u32 sch_no : 16;
} __attribute__ ((packed, aligned(4)));
/* Helper function for sane state of pre-allocated subchannel_id. */
......@@ -23,4 +25,4 @@ schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
}
#endif /* S390_SCHID_H */
#endif /* ASM_SCHID_H */
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册