mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-14 12:49:08 +00:00
[S390] cio: Remove deprecated rdc/rcd.
http://marc.info/?l=linux-kernel&m=118481061928246&w=2 seems to indicate disfavour of "deprecated", so let's just kill it now. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck
Martin Schwidefsky
parent
e62133b4ea
commit
8059862c63
@ -211,22 +211,6 @@ Who: Richard Purdie <rpurdie@rpsys.net>
|
||||
|
||||
---------------------------
|
||||
|
||||
What: read_dev_chars(), read_conf_data{,_lpm}() (s390 common I/O layer)
|
||||
When: December 2007
|
||||
Why: These functions are a leftover from 2.4 times. They have several
|
||||
problems:
|
||||
- Duplication of checks that are done in the device driver's
|
||||
interrupt handler
|
||||
- common I/O layer can't do device specific error recovery
|
||||
- device driver can't be notified for conditions happening during
|
||||
execution of the function
|
||||
Device drivers should issue the read device characteristics and read
|
||||
configuration data ccws and do the appropriate error handling
|
||||
themselves.
|
||||
Who: Cornelia Huck <cornelia.huck@de.ibm.com>
|
||||
|
||||
---------------------------
|
||||
|
||||
What: i2c-ixp2000, i2c-ixp4xx and scx200_i2c drivers
|
||||
When: September 2007
|
||||
Why: Obsolete. The new i2c-gpio driver replaces all hardware-specific
|
||||
|
||||
@ -288,253 +288,6 @@ ccw_device_get_path_mask(struct ccw_device *cdev)
|
||||
return sch->lpm;
|
||||
}
|
||||
|
||||
static void
|
||||
ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
|
||||
{
|
||||
if (!ip)
|
||||
/* unsolicited interrupt */
|
||||
return;
|
||||
|
||||
/* Abuse intparm for error reporting. */
|
||||
if (IS_ERR(irb))
|
||||
cdev->private->intparm = -EIO;
|
||||
else if (irb->scsw.cc == 1)
|
||||
/* Retry for deferred condition code. */
|
||||
cdev->private->intparm = -EAGAIN;
|
||||
else if ((irb->scsw.dstat !=
|
||||
(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
|
||||
(irb->scsw.cstat != 0)) {
|
||||
/*
|
||||
* We didn't get channel end / device end. Check if path
|
||||
* verification has been started; we can retry after it has
|
||||
* finished. We also retry unit checks except for command reject
|
||||
* or intervention required. Also check for long busy
|
||||
* conditions.
|
||||
*/
|
||||
if (cdev->private->flags.doverify ||
|
||||
cdev->private->state == DEV_STATE_VERIFY)
|
||||
cdev->private->intparm = -EAGAIN;
|
||||
else if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
|
||||
!(irb->ecw[0] &
|
||||
(SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
|
||||
cdev->private->intparm = -EAGAIN;
|
||||
else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) &&
|
||||
(irb->scsw.dstat & DEV_STAT_DEV_END) &&
|
||||
(irb->scsw.dstat & DEV_STAT_UNIT_EXCEP))
|
||||
cdev->private->intparm = -EAGAIN;
|
||||
else
|
||||
cdev->private->intparm = -EIO;
|
||||
|
||||
} else
|
||||
cdev->private->intparm = 0;
|
||||
wake_up(&cdev->private->wait_q);
|
||||
}
|
||||
|
||||
static int
|
||||
__ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, __u8 lpm)
|
||||
{
|
||||
int ret;
|
||||
struct subchannel *sch;
|
||||
|
||||
sch = to_subchannel(cdev->dev.parent);
|
||||
do {
|
||||
ccw_device_set_timeout(cdev, 60 * HZ);
|
||||
ret = cio_start (sch, ccw, lpm);
|
||||
if (ret != 0)
|
||||
ccw_device_set_timeout(cdev, 0);
|
||||
if (ret == -EBUSY) {
|
||||
/* Try again later. */
|
||||
spin_unlock_irq(sch->lock);
|
||||
msleep(10);
|
||||
spin_lock_irq(sch->lock);
|
||||
continue;
|
||||
}
|
||||
if (ret != 0)
|
||||
/* Non-retryable error. */
|
||||
break;
|
||||
/* Wait for end of request. */
|
||||
cdev->private->intparm = magic;
|
||||
spin_unlock_irq(sch->lock);
|
||||
wait_event(cdev->private->wait_q,
|
||||
(cdev->private->intparm == -EIO) ||
|
||||
(cdev->private->intparm == -EAGAIN) ||
|
||||
(cdev->private->intparm == 0));
|
||||
spin_lock_irq(sch->lock);
|
||||
/* Check at least for channel end / device end */
|
||||
if (cdev->private->intparm == -EIO) {
|
||||
/* Non-retryable error. */
|
||||
ret = -EIO;
|
||||
break;
|
||||
}
|
||||
if (cdev->private->intparm == 0)
|
||||
/* Success. */
|
||||
break;
|
||||
/* Try again later. */
|
||||
spin_unlock_irq(sch->lock);
|
||||
msleep(10);
|
||||
spin_lock_irq(sch->lock);
|
||||
} while (1);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* read_dev_chars() - read device characteristics
|
||||
* @param cdev target ccw device
|
||||
* @param buffer pointer to buffer for rdc data
|
||||
* @param length size of rdc data
|
||||
* @returns 0 for success, negative error value on failure
|
||||
*
|
||||
* Context:
|
||||
* called for online device, lock not held
|
||||
**/
|
||||
int
|
||||
read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
|
||||
{
|
||||
void (*handler)(struct ccw_device *, unsigned long, struct irb *);
|
||||
struct subchannel *sch;
|
||||
int ret;
|
||||
struct ccw1 *rdc_ccw;
|
||||
|
||||
if (!cdev)
|
||||
return -ENODEV;
|
||||
if (!buffer || !length)
|
||||
return -EINVAL;
|
||||
sch = to_subchannel(cdev->dev.parent);
|
||||
|
||||
CIO_TRACE_EVENT (4, "rddevch");
|
||||
CIO_TRACE_EVENT (4, sch->dev.bus_id);
|
||||
|
||||
rdc_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
|
||||
if (!rdc_ccw)
|
||||
return -ENOMEM;
|
||||
rdc_ccw->cmd_code = CCW_CMD_RDC;
|
||||
rdc_ccw->count = length;
|
||||
rdc_ccw->flags = CCW_FLAG_SLI;
|
||||
ret = set_normalized_cda (rdc_ccw, (*buffer));
|
||||
if (ret != 0) {
|
||||
kfree(rdc_ccw);
|
||||
return ret;
|
||||
}
|
||||
|
||||
spin_lock_irq(sch->lock);
|
||||
/* Save interrupt handler. */
|
||||
handler = cdev->handler;
|
||||
/* Temporarily install own handler. */
|
||||
cdev->handler = ccw_device_wake_up;
|
||||
if (cdev->private->state != DEV_STATE_ONLINE)
|
||||
ret = -ENODEV;
|
||||
else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
|
||||
!(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
|
||||
cdev->private->flags.doverify)
|
||||
ret = -EBUSY;
|
||||
else
|
||||
/* 0x00D9C4C3 == ebcdic "RDC" */
|
||||
ret = __ccw_device_retry_loop(cdev, rdc_ccw, 0x00D9C4C3, 0);
|
||||
|
||||
/* Restore interrupt handler. */
|
||||
cdev->handler = handler;
|
||||
spin_unlock_irq(sch->lock);
|
||||
|
||||
clear_normalized_cda (rdc_ccw);
|
||||
kfree(rdc_ccw);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read Configuration data using path mask
|
||||
*/
|
||||
int
|
||||
read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lpm)
|
||||
{
|
||||
void (*handler)(struct ccw_device *, unsigned long, struct irb *);
|
||||
struct subchannel *sch;
|
||||
struct ciw *ciw;
|
||||
char *rcd_buf;
|
||||
int ret;
|
||||
struct ccw1 *rcd_ccw;
|
||||
|
||||
if (!cdev)
|
||||
return -ENODEV;
|
||||
if (!buffer || !length)
|
||||
return -EINVAL;
|
||||
sch = to_subchannel(cdev->dev.parent);
|
||||
|
||||
CIO_TRACE_EVENT (4, "rdconf");
|
||||
CIO_TRACE_EVENT (4, sch->dev.bus_id);
|
||||
|
||||
/*
|
||||
* scan for RCD command in extended SenseID data
|
||||
*/
|
||||
ciw = ccw_device_get_ciw(cdev, CIW_TYPE_RCD);
|
||||
if (!ciw || ciw->cmd == 0)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
/* Adjust requested path mask to excluded varied off paths. */
|
||||
if (lpm) {
|
||||
lpm &= sch->opm;
|
||||
if (lpm == 0)
|
||||
return -EACCES;
|
||||
}
|
||||
|
||||
rcd_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
|
||||
if (!rcd_ccw)
|
||||
return -ENOMEM;
|
||||
rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
|
||||
if (!rcd_buf) {
|
||||
kfree(rcd_ccw);
|
||||
return -ENOMEM;
|
||||
}
|
||||
rcd_ccw->cmd_code = ciw->cmd;
|
||||
rcd_ccw->cda = (__u32) __pa (rcd_buf);
|
||||
rcd_ccw->count = ciw->count;
|
||||
rcd_ccw->flags = CCW_FLAG_SLI;
|
||||
|
||||
spin_lock_irq(sch->lock);
|
||||
/* Save interrupt handler. */
|
||||
handler = cdev->handler;
|
||||
/* Temporarily install own handler. */
|
||||
cdev->handler = ccw_device_wake_up;
|
||||
if (cdev->private->state != DEV_STATE_ONLINE)
|
||||
ret = -ENODEV;
|
||||
else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
|
||||
!(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
|
||||
cdev->private->flags.doverify)
|
||||
ret = -EBUSY;
|
||||
else
|
||||
/* 0x00D9C3C4 == ebcdic "RCD" */
|
||||
ret = __ccw_device_retry_loop(cdev, rcd_ccw, 0x00D9C3C4, lpm);
|
||||
|
||||
/* Restore interrupt handler. */
|
||||
cdev->handler = handler;
|
||||
spin_unlock_irq(sch->lock);
|
||||
|
||||
/*
|
||||
* on success we update the user input parms
|
||||
*/
|
||||
if (ret) {
|
||||
kfree (rcd_buf);
|
||||
*buffer = NULL;
|
||||
*length = 0;
|
||||
} else {
|
||||
*length = ciw->count;
|
||||
*buffer = rcd_buf;
|
||||
}
|
||||
kfree(rcd_ccw);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read Configuration data
|
||||
*/
|
||||
int
|
||||
read_conf_data (struct ccw_device *cdev, void **buffer, int *length)
|
||||
{
|
||||
return read_conf_data_lpm (cdev, buffer, length, 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Try to break the lock on a boxed device.
|
||||
*/
|
||||
@ -649,8 +402,5 @@ EXPORT_SYMBOL(ccw_device_start_timeout_key);
|
||||
EXPORT_SYMBOL(ccw_device_start_key);
|
||||
EXPORT_SYMBOL(ccw_device_get_ciw);
|
||||
EXPORT_SYMBOL(ccw_device_get_path_mask);
|
||||
EXPORT_SYMBOL(read_conf_data);
|
||||
EXPORT_SYMBOL(read_dev_chars);
|
||||
EXPORT_SYMBOL(_ccw_device_get_subchannel_number);
|
||||
EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc);
|
||||
EXPORT_SYMBOL_GPL(read_conf_data_lpm);
|
||||
|
||||
@ -165,11 +165,6 @@ extern int ccw_device_resume(struct ccw_device *);
|
||||
extern int ccw_device_halt(struct ccw_device *, unsigned long);
|
||||
extern int ccw_device_clear(struct ccw_device *, unsigned long);
|
||||
|
||||
extern int __deprecated read_dev_chars(struct ccw_device *cdev, void **buffer, int length);
|
||||
extern int __deprecated read_conf_data(struct ccw_device *cdev, void **buffer, int *length);
|
||||
extern int __deprecated read_conf_data_lpm(struct ccw_device *cdev, void **buffer,
|
||||
int *length, __u8 lpm);
|
||||
|
||||
extern int ccw_device_set_online(struct ccw_device *cdev);
|
||||
extern int ccw_device_set_offline(struct ccw_device *cdev);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user