Linux/Unix编程

开发平台：

Unix_Linux

s390io.c：源码内容

pdi->status |= DEVSTAT_DEVICE_OWNED;
if (!ioinfo[i]->ui.flags.unfriendly)
rc = 0; /* found */
else
rc = -EUSERS;
break;
}
}
return (rc);
}
int
get_irq_by_devno (__u16 devno)
{
int i;
int rc = -1;
if (devno <= 0x0000ffff) {
for (i = 0; i <= highest_subchannel; i++) {
if ((ioinfo[i] != INVALID_STORAGE_AREA)
&& (!ioinfo[i]->st)
&& (ioinfo[i]->schib.pmcw.dev == devno)
&& (ioinfo[i]->schib.pmcw.dnv == 1)) {
rc = i;
break;
}
}
}
return (rc);
}
unsigned int
get_devno_by_irq (int irq)
{
if ((irq > highest_subchannel)
|| (irq < 0)
|| (ioinfo[irq] == INVALID_STORAGE_AREA)) {
return -1;
}
if (ioinfo[irq]->st)
return -1;
/*
* we don't need to check for the device be operational
* as the initial STSCH will always present the device
* number defined by the IOCDS regardless of the device
* existing or not. However, there could be subchannels
* defined who's device number isn't valid ...
*/
if (ioinfo[irq]->schib.pmcw.dnv)
return (ioinfo[irq]->schib.pmcw.dev);
else
return -1;
}
/*
* s390_device_recognition_irq
*
* Used for individual device recognition. Issues the device
* independant SenseID command to obtain info the device type.
*
*/
void
s390_device_recognition_irq (int irq)
{
int ret;
char dbf_txt[15];
sprintf (dbf_txt, "dri%x", irq);
CIO_TRACE_EVENT (4, dbf_txt);
/*
* We issue the SenseID command on I/O subchannels we think are
* operational only.
*/
if ((ioinfo[irq] != INVALID_STORAGE_AREA)
&& (!ioinfo[irq]->st)
&& (ioinfo[irq]->schib.pmcw.st == 0)
&& (ioinfo[irq]->ui.flags.oper == 1)) {
int irq_ret;
devstat_t devstat;
irq_ret = request_irq (irq,
init_IRQ_handler,
SA_PROBE, "INIT", &devstat);
if (!irq_ret) {
ret = enable_cpu_sync_isc (irq);
if (!ret) {
pgid_t pgid;
/*
* First thing we should do is a sensePGID in
* order to find out how we can proceed with
* the recognition process.
* An unfriendly (locked by so else) device
* won't take kindly to our attempts at
* SetPGID and SenseID...
*/
memcpy(&pgid, global_pgid, sizeof(pgid_t));
ret = s390_SensePGID(irq, 0xff, &pgid);
if (ret == -EOPNOTSUPP)
/*
* Doesn't prevent us from proceeding
*/
ret = 0;
if (!ret && !ioinfo[irq]->ui.flags.unfriendly) {
ioinfo[irq]->ui.flags.unknown = 0;
memset (&ioinfo[irq]->senseid, '',
sizeof (senseid_t));
if (cio_sid_with_pgid) {
ret = s390_DevicePathVerification(irq,0);
if (ret == -EOPNOTSUPP)
/*
* Doesn't prevent us from proceeding
*/
ret = 0;
}
/*
* we'll fallthrough here if we don't want
* to do SPID before SID
*/
if (!ret) {
s390_SenseID (irq, &ioinfo[irq]->senseid, 0xff);
#if 0 /* FIXME */
/*
* We initially check the configuration data for
* those devices with more than a single path
*/
if (ioinfo[irq]->schib.pmcw.pim != 0x80) {
char *prcd;
int lrcd;
ret =
read_conf_data (irq,
(void **) &prcd,
&lrcd, 0);
if (!ret) // on success only ...
{
char buffer[80];
#ifdef CONFIG_DEBUG_IO
sprintf (buffer,
"RCD for device(%04X)/"
"subchannel(%04X) returns :n",
ioinfo[irq]->schib.
pmcw.dev, irq);
s390_displayhex (buffer, prcd,
lrcd);
#endif
if (cio_debug_initialized) {
sprintf (buffer,
"RCD for device(%04X)/"
"subchannel(%04X) returns :n",
ioinfo[irq]->
schib.pmcw.dev,
irq);
s390_displayhex2
(buffer, prcd, lrcd,
2);
}
if (init_IRQ_complete) {
kfree (prcd);
} else {
free_bootmem ((unsigned
long)
prcd,
lrcd);
}
}
}
#endif
}
}
disable_cpu_sync_isc (irq);
}
free_irq (irq, &devstat);
}
}
}
/*
* s390_device_recognition_all
*
* Used for system wide device recognition.
*
*/
void
s390_device_recognition_all (void)
{
int irq = 0; /* let's start with subchannel 0 ... */
do {
s390_device_recognition_irq (irq);
irq++;
} while (irq <= highest_subchannel);
}
/*
* Function: s390_redo_validation
* Look for no longer blacklisted devices
* FIXME: there must be a better way to do this...
*/
void
s390_redo_validation (void)
{
int irq = 0;
int ret;
CIO_TRACE_EVENT (0, "redoval");
do {
if (ioinfo[irq] == INVALID_STORAGE_AREA) {
ret = s390_validate_subchannel (irq, 0);
if (!ret) {
s390_device_recognition_irq (irq);
if (ioinfo[irq]->ui.flags.oper) {
devreg_t *pdevreg;
pdevreg =
s390_search_devreg (ioinfo[irq]);
if (pdevreg != NULL) {
if (pdevreg->oper_func != NULL)
pdevreg->oper_func (irq,
pdevreg);
}
}
#ifdef CONFIG_PROC_FS
if (cio_proc_devinfo)
if (irq < MAX_CIO_PROCFS_ENTRIES) {
cio_procfs_device_create (ioinfo
[irq]->
devno);
}
#endif
}
}
irq++;
} while (irq <= highest_subchannel);
}
/*
* s390_trigger_resense
*
* try to re-sense the device on subchannel irq
* only to be called without interrupt handler
*/
int
s390_trigger_resense(int irq)
{
char dbf_txt[8];
SANITY_CHECK(irq);
CIO_TRACE_EVENT (2, "tsns");
sprintf(dbf_txt, "%x", irq);
CIO_TRACE_EVENT (2, dbf_txt);
if (ioinfo[irq]->ui.flags.ready) {
printk (KERN_WARNING "s390_trigger_resense(%04X): "
"Device is in use!n", irq);
return -EBUSY;
}
s390_device_recognition_irq(irq);
return 0;
}
/*
* s390_search_devices
*
* Determines all subchannels available to the system.
*
*/
void
s390_process_subchannels (void)
{
int ret;
int irq = 0; /* Evaluate all subchannels starting with 0 ... */
do {
ret = s390_validate_subchannel (irq, 0);
if (ret != -ENXIO)
irq++;
} while ((ret != -ENXIO) && (irq < __MAX_SUBCHANNELS));
highest_subchannel = (--irq);
printk (KERN_INFO "Highest subchannel number detected (hex) : %04Xn",
highest_subchannel);
CIO_MSG_EVENT(0,
"Highest subchannel number detected "
"(hex) : %04Xn", highest_subchannel);
}
/*
* s390_validate_subchannel()
*
* Process the subchannel for the requested irq. Returns 1 for valid
* subchannels, otherwise 0.
*/
int
s390_validate_subchannel (int irq, int enable)
{
int retry; /* retry count for status pending conditions */
int ccode; /* condition code for stsch() only */
int ccode2; /* condition code for other I/O routines */
schib_t *p_schib;
int ret;
#ifdef CONFIG_CHSC
int chp = 0;
int mask;
#endif /* CONFIG_CHSC */
char dbf_txt[15];
sprintf (dbf_txt, "vals%x", irq);
CIO_TRACE_EVENT (4, dbf_txt);
/*
* The first subchannel that is not-operational (ccode==3)
* indicates that there aren't any more devices available.
*/
if ((init_IRQ_complete)
&& (ioinfo[irq] != INVALID_STORAGE_AREA)) {
p_schib = &ioinfo[irq]->schib;
} else {
p_schib = p_init_schib;
}
/*
* If we knew the device before we assume the worst case ...
*/
if (ioinfo[irq] != INVALID_STORAGE_AREA) {
ioinfo[irq]->ui.flags.oper = 0;
ioinfo[irq]->ui.flags.dval = 0;
}
ccode = stsch (irq, p_schib);
if (ccode) {
return -ENXIO;
}
/*
* ... just being curious we check for non I/O subchannels
*/
if (p_schib->pmcw.st) {
if (cio_show_msg) {
printk (KERN_INFO "Subchannel %04X reports "
"non-I/O subchannel type %04Xn",
irq, p_schib->pmcw.st);
}
CIO_MSG_EVENT(0,
"Subchannel %04X reports "
"non-I/O subchannel type %04Xn",
irq, p_schib->pmcw.st);
if (ioinfo[irq] != INVALID_STORAGE_AREA)
ioinfo[irq]->ui.flags.oper = 0;
}
if ((!p_schib->pmcw.dnv) && (!p_schib->pmcw.st)) {
return -ENODEV;
}
if (!p_schib->pmcw.st) {
if (is_blacklisted (p_schib->pmcw.dev)) {
/*
* This device must not be known to Linux. So we simply say that
* there is no device and return ENODEV.
*/
#ifdef CONFIG_DEBUG_IO
printk (KERN_DEBUG
"Blacklisted device detected at devno %04Xn",
p_schib->pmcw.dev);
#endif
CIO_MSG_EVENT(0,
"Blacklisted device detected at devno %04Xn",
p_schib->pmcw.dev);
return -ENODEV;
}
}
if (ioinfo[irq] == INVALID_STORAGE_AREA) {
if (!init_IRQ_complete) {
ioinfo[irq] = (ioinfo_t *)
alloc_bootmem_low (sizeof (ioinfo_t));
} else {
ioinfo[irq] = (ioinfo_t *)
kmalloc (sizeof (ioinfo_t), GFP_DMA);
}
memset (ioinfo[irq], '', sizeof (ioinfo_t));
memcpy (&ioinfo[irq]->schib, p_init_schib, sizeof (schib_t));
/*
* We have to insert the new ioinfo element
* into the linked list, either at its head,
* its tail or insert it.
*/
if (ioinfo_head == NULL) { /* first element */
ioinfo_head = ioinfo[irq];
ioinfo_tail = ioinfo[irq];
} else if (irq < ioinfo_head->irq) { /* new head */
ioinfo[irq]->next = ioinfo_head;
ioinfo_head->prev = ioinfo[irq];
ioinfo_head = ioinfo[irq];
} else if (irq > ioinfo_tail->irq) { /* new tail */
ioinfo_tail->next = ioinfo[irq];
ioinfo[irq]->prev = ioinfo_tail;
ioinfo_tail = ioinfo[irq];
} else { /* insert element */
ioinfo_t *pi = ioinfo_head;
for (pi = ioinfo_head; pi != NULL; pi = pi->next) {
if (irq < pi->next->irq) {
ioinfo[irq]->next = pi->next;
ioinfo[irq]->prev = pi;
pi->next->prev = ioinfo[irq];
pi->next = ioinfo[irq];
break;
}
}
}
}
/* initialize some values ... */
ioinfo[irq]->irq = irq;
ioinfo[irq]->st = ioinfo[irq]->schib.pmcw.st;
if (ioinfo[irq]->st)
return -ENODEV;
ioinfo[irq]->ui.flags.pgid_supp = 1;
ioinfo[irq]->opm = ioinfo[irq]->schib.pmcw.pim
& ioinfo[irq]->schib.pmcw.pam & ioinfo[irq]->schib.pmcw.pom;
#ifdef CONFIG_CHSC
if (ioinfo[irq]->opm) {
for (chp=0;chp<=7;chp++) {
mask = 0x80 >> chp;
if (ioinfo[irq]->opm & mask) {
if (!test_bit
(ioinfo[irq]->schib.pmcw.chpid[chp],
&chpids_logical)) {
/* disable using this path */
ioinfo[irq]->opm &= ~mask;
}
}
}
}
#endif /* CONFIG_CHSC */
if (cio_show_msg) {
printk (KERN_INFO
"Detected device %04X "
"on subchannel %04X"
" - PIM = %02X, PAM = %02X, POM = %02Xn",
ioinfo[irq]->schib.pmcw.dev,
irq,
ioinfo[irq]->schib.pmcw.pim,
ioinfo[irq]->schib.pmcw.pam,
ioinfo[irq]->schib.pmcw.pom);
}
CIO_MSG_EVENT(0,
"Detected device %04X "
"on subchannel %04X"
" - PIM = %02X, "
"PAM = %02X, POM = %02Xn",
ioinfo[irq]->schib.pmcw.dev,
irq,
ioinfo[irq]->schib.pmcw.pim,
ioinfo[irq]->schib.pmcw.pam,
ioinfo[irq]->schib.pmcw.pom);
/*
* initialize ioinfo structure
*/
if (!ioinfo[irq]->ui.flags.ready) {
ioinfo[irq]->nopfunc = NULL;
ioinfo[irq]->ui.flags.busy = 0;
ioinfo[irq]->ui.flags.dval = 1;
ioinfo[irq]->devstat.intparm = 0;
}
ioinfo[irq]->devstat.devno = ioinfo[irq]->schib.pmcw.dev;
ioinfo[irq]->devno = ioinfo[irq]->schib.pmcw.dev;
/*
* We should have at least one CHPID ...
*/
if (ioinfo[irq]->opm) {
/*
* We now have to initially ...
* ... set "interruption sublass"
* ... enable "concurrent sense"
* ... enable "multipath mode" if more than one
* CHPID is available. This is done regardless
* whether multiple paths are available for us.
*
* Note : we don't enable the device here, this is temporarily
* done during device sensing below.
*/
ioinfo[irq]->schib.pmcw.isc = 3; /* could be smth. else */
ioinfo[irq]->schib.pmcw.csense = 1; /* concurrent sense */
ioinfo[irq]->schib.pmcw.ena = enable;
ioinfo[irq]->schib.pmcw.intparm = ioinfo[irq]->schib.pmcw.dev;
if ((ioinfo[irq]->opm != 0x80)
&& (ioinfo[irq]->opm != 0x40)
&& (ioinfo[irq]->opm != 0x20)
&& (ioinfo[irq]->opm != 0x10)
&& (ioinfo[irq]->opm != 0x08)
&& (ioinfo[irq]->opm != 0x04)
&& (ioinfo[irq]->opm != 0x02)
&& (ioinfo[irq]->opm != 0x01)) {
ioinfo[irq]->schib.pmcw.mp = 1; /* multipath mode */
}
retry = 5;
do {
ccode2 = msch_err (irq, &ioinfo[irq]->schib);
switch (ccode2) {
case 0:
/*
* successful completion
*
* concurrent sense facility available
*/
ioinfo[irq]->ui.flags.oper = 1;
ioinfo[irq]->ui.flags.consns = 1;
ret = 0;
break;
case 1:
/*
* status pending
*
* How can we have a pending status
* as the device is disabled for
* interrupts ?
* Anyway, process it ...
*/
ioinfo[irq]->ui.flags.s_pend = 1;
s390_process_IRQ (irq);
ioinfo[irq]->ui.flags.s_pend = 0;
retry--;
ret = -EIO;
break;
case 2:
/*
* busy
*
* we mark it not-oper as we can't
* properly operate it !
*/
ioinfo[irq]->ui.flags.oper = 0;
udelay (100); /* allow for recovery */
retry--;
ret = -EBUSY;
break;
case 3: /* not operational */
ioinfo[irq]->ui.flags.oper = 0;
retry = 0;
ret = -ENODEV;
break;
default:
#define PGMCHK_OPERAND_EXC 0x15
if ((ccode2 & PGMCHK_OPERAND_EXC)
== PGMCHK_OPERAND_EXC) {
/*
* re-issue the modify subchannel without trying to
* enable the concurrent sense facility
*/
ioinfo[irq]->schib.pmcw.csense = 0;
ccode2 =
msch_err (irq, &ioinfo[irq]->schib);
if (ccode2 != 0) {
printk (KERN_ERR
" ... msch() (2) failed"
" with CC = %Xn",
ccode2);
CIO_MSG_EVENT(0,
"msch() (2) failed"
" with CC=%Xn",
ccode2);
ioinfo[irq]->ui.flags.oper = 0;
ret = -EIO;
} else {
ioinfo[irq]->ui.flags.oper = 1;
ioinfo[irq]->ui.
flags.consns = 0;
ret = 0;
}
} else {
printk (KERN_ERR
" ... msch() (1) failed with "
"CC = %Xn", ccode2);
CIO_MSG_EVENT(0,
"msch() (1) failed with "
"CC = %Xn", ccode2);
ioinfo[irq]->ui.flags.oper = 0;
ret = -EIO;
}
retry = 0;
break;
}
} while (ccode2 && retry);
if ((ccode2 != 0) && (ccode2 != 3)
&& (!retry)) {
printk (KERN_ERR
" ... msch() retry count for "
"subchannel %04X exceeded, CC = %dn",
irq, ccode2);
CIO_MSG_EVENT(0,
" ... msch() retry count for "
"subchannel %04X exceeded, CC = %dn",
irq, ccode2);
}
} else {
/* no path available ... */
ioinfo[irq]->ui.flags.oper = 0;
ret = -ENODEV;
}
return (ret);
}
/*
* s390_SenseID
*
* Try to obtain the 'control unit'/'device type' information
* associated with the subchannel.
*
* The function is primarily meant to be called without irq
* action handler in place. However, it also allows for
* use with an action handler in place. If there is already
* an action handler registered assure it can handle the
* s390_SenseID() related device interrupts - interruption
* parameter used is 0x00E2C9C4 ( SID ).
*/
int
s390_SenseID (int irq, senseid_t * sid, __u8 lpm)
{
ccw1_t *sense_ccw; /* ccw area for SenseID command */
senseid_t isid; /* internal sid */
devstat_t devstat; /* required by request_irq() */
__u8 pathmask; /* calulate path mask */
__u8 domask; /* path mask to use */
int inlreq; /* inline request_irq() */
int irq_ret; /* return code */
devstat_t *pdevstat; /* ptr to devstat in use */
int retry; /* retry count */
int io_retry; /* retry indicator */
senseid_t *psid = sid; /* start with the external buffer */
int sbuffer = 0; /* switch SID data buffer */
char dbf_txt[15];
int i;
int failure = 0; /* nothing went wrong yet */
SANITY_CHECK (irq);
if (ioinfo[irq]->ui.flags.oper == 0) {
return (-ENODEV);
}
if (ioinfo[irq]->ui.flags.unfriendly) {
/* don't even try it */
return -EUSERS;
}
CIO_TRACE_EVENT (4, "senseID");
sprintf (dbf_txt, "%x", irq);
CIO_TRACE_EVENT (4, dbf_txt);
inlreq = 0; /* to make the compiler quiet... */
if (!ioinfo[irq]->ui.flags.ready) {
pdevstat = &devstat;
/*
* Perform SENSE ID command processing. We have to request device
* ownership and provide a dummy I/O handler. We issue sync. I/O
* requests and evaluate the devstat area on return therefore
* we don't need a real I/O handler in place.
*/
irq_ret =
request_irq (irq, init_IRQ_handler, SA_PROBE, "SID",
&devstat);
if (irq_ret == 0)
inlreq = 1;
} else {
inlreq = 0;
irq_ret = 0;
pdevstat = ioinfo[irq]->irq_desc.dev_id;
}
if (irq_ret) {
return irq_ret;
}
s390irq_spin_lock (irq);
if (init_IRQ_complete) {
sense_ccw = kmalloc (2 * sizeof (ccw1_t), GFP_DMA);
} else {
sense_ccw = alloc_bootmem_low (2 * sizeof (ccw1_t));
}
/* more than one path installed ? */
if (ioinfo[irq]->schib.pmcw.pim != 0x80) {
sense_ccw[0].cmd_code = CCW_CMD_SUSPEND_RECONN;
sense_ccw[0].cda = 0;
sense_ccw[0].count = 0;
sense_ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
sense_ccw[1].cmd_code = CCW_CMD_SENSE_ID;
sense_ccw[1].cda = (__u32) virt_to_phys (sid);
sense_ccw[1].count = sizeof (senseid_t);
sense_ccw[1].flags = CCW_FLAG_SLI;
} else {
sense_ccw[0].cmd_code = CCW_CMD_SENSE_ID;
sense_ccw[0].cda = (__u32) virt_to_phys (sid);
sense_ccw[0].count = sizeof (senseid_t);
sense_ccw[0].flags = CCW_FLAG_SLI;
}
for (i = 0; (i < 8); i++) {
pathmask = 0x80 >> i;
domask = ioinfo[irq]->opm & pathmask;
if (lpm)
domask &= lpm;
if (!domask)
continue;
failure = 0;
memset(psid, 0, sizeof(senseid_t));
psid->cu_type = 0xFFFF; /* initialize fields ... */
retry = 5; /* retry count */
io_retry = 1; /* enable retries */
/*
* We now issue a SenseID request. In case of BUSY,
* STATUS PENDING or non-CMD_REJECT error conditions
* we run simple retries.
*/
do {
memset (pdevstat, '', sizeof (devstat_t));
irq_ret = s390_start_IO (irq, sense_ccw, 0x00E2C9C4, /* == SID */
domask,
DOIO_WAIT_FOR_INTERRUPT
| DOIO_TIMEOUT
| DOIO_VALID_LPM
| DOIO_DONT_CALL_INTHDLR);
if ((psid->cu_type != 0xFFFF)
&& (psid->reserved == 0xFF)) {
if (!sbuffer) { /* switch buffers */
/*
* we report back the
* first hit only
*/
psid = &isid;
if (ioinfo[irq]->schib.pmcw.pim != 0x80) {
sense_ccw[1].cda = (__u32)
virt_to_phys (psid);
} else {
sense_ccw[0].cda = (__u32)
virt_to_phys (psid);
}
/*
* if just the very first
* was requested to be
* sensed disable further
* scans.
*/
if (!lpm)
lpm = domask;
sbuffer = 1;
}
if (pdevstat->rescnt < (sizeof (senseid_t) - 8)) {
ioinfo[irq]->ui.flags.esid = 1;
}
io_retry = 0;
break;
}
failure = 1;
if (pdevstat->flag & DEVSTAT_STATUS_PENDING) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_DEBUG
"SenseID : device %04X on "
"Subchannel %04X "
"reports pending status, "
"retry : %dn",
ioinfo[irq]->schib.pmcw.dev, irq,
retry);
#endif
CIO_MSG_EVENT(2,
"SenseID : device %04X on "
"Subchannel %04X "
"reports pending status, "
"retry : %dn",
ioinfo
[irq]->schib.pmcw.dev, irq, retry);
}
else if (pdevstat->flag & DEVSTAT_FLAG_SENSE_AVAIL) {
/*
* if the device doesn't support the SenseID
* command further retries wouldn't help ...
*/
if (pdevstat->ii.sense.data[0]
& (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"SenseID : device %04X on "
"Subchannel %04X "
"reports cmd reject or "
"intervention requiredn",
ioinfo[irq]->schib.pmcw.dev,
irq);
#endif
CIO_MSG_EVENT(2,
"SenseID : device %04X on "
"Subchannel %04X "
"reports cmd reject or "
"intervention requiredn",
ioinfo[irq]->schib.pmcw.dev,
irq);
io_retry = 0;
} else {
#ifdef CONFIG_DEBUG_IO
printk
(KERN_WARNING
"SenseID : UC on "
"dev %04X, "
"retry %d, "
"lpum %02X, "
"cnt %02d, "
"sns :"
" %02X%02X%02X%02X "
"%02X%02X%02X%02X ...n",
ioinfo[irq]->schib.pmcw.dev,
retry,
pdevstat->lpum,
pdevstat->scnt,
pdevstat->ii.sense.data[0],
pdevstat->ii.sense.data[1],
pdevstat->ii.sense.data[2],
pdevstat->ii.sense.data[3],
pdevstat->ii.sense.data[4],
pdevstat->ii.sense.data[5],
pdevstat->ii.sense.data[6],
pdevstat->ii.sense.data[7]);
#endif
CIO_MSG_EVENT(2,
"SenseID : UC on "
"dev %04X, "
"retry %d, "
"lpum %02X, "
"cnt %02d, "
"sns :"
" %02X%02X%02X%02X "
"%02X%02X%02X%02X ...n",
ioinfo[irq]->
schib.pmcw.dev,
retry,
pdevstat->lpum,
pdevstat->scnt,
pdevstat->
ii.sense.data[0],
pdevstat->
ii.sense.data[1],
pdevstat->
ii.sense.data[2],
pdevstat->
ii.sense.data[3],
pdevstat->
ii.sense.data[4],
pdevstat->
ii.sense.data[5],
pdevstat->
ii.sense.data[6],
pdevstat->
ii.sense.data[7]);
}
} else if ((pdevstat->flag & DEVSTAT_NOT_OPER)
|| (irq_ret == -ENODEV)) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"SenseID : path %02X for "
"device %04X on "
"subchannel %04X "
"is 'not operational'n",
domask,
ioinfo[irq]->schib.pmcw.dev, irq);
#endif
CIO_MSG_EVENT(2,
"SenseID : path %02X for "
"device %04X on "
"subchannel %04X "
"is 'not operational'n",
domask,
ioinfo[irq]->schib.pmcw.dev, irq);
io_retry = 0;
ioinfo[irq]->opm &= ~domask;
} else {
#ifdef CONFIG_DEBUG_IO
printk (KERN_INFO
"SenseID : start_IO() for "
"device %04X on "
"subchannel %04X "
"returns %d, retry %d, "
"status %04Xn",
ioinfo[irq]->schib.pmcw.dev,
irq, irq_ret, retry, pdevstat->flag);
#endif
CIO_MSG_EVENT(2,
"SenseID : start_IO() for "
"device %04X on "
"subchannel %04X "
"returns %d, retry %d, "
"status %04Xn",
ioinfo[irq]->schib.pmcw.dev, irq,
irq_ret, retry, pdevstat->flag);
if (irq_ret == -ETIMEDOUT) {
int xret;
/*
* Seems we need to cancel the first ssch sometimes...
* On the next try, the ssch will usually be fine.
*/
xret = cancel_IO (irq);
if (!xret)
CIO_MSG_EVENT(2,
"SenseID: sch canceled "
"successfully for irq %xn",
irq);
}
}
if (io_retry) {
retry--;
if (retry == 0) {
io_retry = 0;
}
}
if ((failure) && (io_retry)) {
/* reset fields... */
failure = 0;
memset(psid, 0, sizeof(senseid_t));
psid->cu_type = 0xFFFF;
}
} while ((io_retry));
}
if (init_IRQ_complete) {
kfree (sense_ccw);
} else {
free_bootmem ((unsigned long) sense_ccw, 2 * sizeof (ccw1_t));
}
s390irq_spin_unlock (irq);
/*
* If we installed the irq action handler we have to
* release it too.
*/
if (inlreq)
free_irq (irq, pdevstat);
/*
* if running under VM check there ... perhaps we should do
* only if we suffered a command reject, but it doesn't harm
*/
if ((sid->cu_type == 0xFFFF)
&& (MACHINE_IS_VM)) {
VM_virtual_device_info (ioinfo[irq]->schib.pmcw.dev, sid);
}
if (sid->cu_type == 0xFFFF) {
/*
* SenseID CU-type of 0xffff indicates that no device
* information could be retrieved (pre-init value).
*
* If we can't couldn't identify the device type we
* consider the device "not operational".
*/
#ifdef CONFIG_DEBUG_IO
printk (KERN_WARNING
"SenseID : unknown device %04X on subchannel %04Xn",
ioinfo[irq]->schib.pmcw.dev, irq);
#endif
CIO_MSG_EVENT(2,
"SenseID : unknown device %04X on subchannel %04Xn",
ioinfo[irq]->schib.pmcw.dev, irq);
ioinfo[irq]->ui.flags.unknown = 1;
}
/*
* Issue device info message if unit was operational .
*/
if (!ioinfo[irq]->ui.flags.unknown) {
if (sid->dev_type != 0) {
if (cio_show_msg)
printk (KERN_INFO
"SenseID : device %04X reports: "
"CU Type/Mod = %04X/%02X,"
" Dev Type/Mod = %04X/%02Xn",
ioinfo[irq]->schib.pmcw.dev,
sid->cu_type, sid->cu_model,
sid->dev_type, sid->dev_model);
CIO_MSG_EVENT(2,
"SenseID : device %04X reports: "
"CU Type/Mod = %04X/%02X,"
" Dev Type/Mod = %04X/%02Xn",
ioinfo[irq]->schib.
pmcw.dev,
sid->cu_type,
sid->cu_model,
sid->dev_type,
sid->dev_model);
} else {
if (cio_show_msg)
printk (KERN_INFO
"SenseID : device %04X reports:"
" Dev Type/Mod = %04X/%02Xn",
ioinfo[irq]->schib.pmcw.dev,
sid->cu_type, sid->cu_model);
CIO_MSG_EVENT(2,
"SenseID : device %04X reports:"
" Dev Type/Mod = %04X/%02Xn",
ioinfo[irq]->schib.
pmcw.dev,
sid->cu_type,
sid->cu_model);
}
}
if (!ioinfo[irq]->ui.flags.unknown)
irq_ret = 0;
else
irq_ret = -ENODEV;
return (irq_ret);
}
static int __inline__
s390_SetMultiPath (int irq)
{
int cc;
cc = stsch (irq, &ioinfo[irq]->schib);
if (!cc) {
ioinfo[irq]->schib.pmcw.mp = 1; /* multipath mode */
cc = msch (irq, &ioinfo[irq]->schib);
}
return (cc);
}
/*
* Device Path Verification
*
* Path verification is accomplished by checking which paths (CHPIDs) are
* available. Further, a path group ID is set, if possible in multipath
* mode, otherwise in single path mode.
*
* Note : This function must not be called during normal device recognition,
* but during device driver initiated request_irq() processing only.
*/
int
s390_DevicePathVerification (int irq, __u8 usermask)
{
int ccode;
__u8 pathmask;
__u8 domask;
#ifdef CONFIG_CHSC
int chp;
int mask;
int old_opm = 0;
#endif /* CONFIG_CHSC */
int ret = 0;
int i;
pgid_t pgid;
__u8 dev_path;
int first = 1;
char dbf_txt[15];
sprintf (dbf_txt, "dpvf%x", irq);
CIO_TRACE_EVENT (4, dbf_txt);
if (ioinfo[irq]->st)
return -ENODEV;
#ifdef CONFIG_CHSC
old_opm = ioinfo[irq]->opm;
#endif /* CONFIG_CHSC */
ccode = stsch (irq, &(ioinfo[irq]->schib));
if (ccode) {
return -ENODEV;
}
if (ioinfo[irq]->schib.pmcw.pim == 0x80) {
/*
* no error, just not required for single path only devices
*/
ioinfo[irq]->ui.flags.pgid_supp = 0;
ret = 0;
#ifdef CONFIG_CHSC
/*
* disable if chpid is logically offline
*/
if (!test_bit(ioinfo[irq]->schib.pmcw.chpid[0],
&chpids_logical)) {
not_oper_handler_func_t nopfunc=ioinfo[irq]->nopfunc;
int was_oper = ioinfo[irq]->ui.flags.oper;
ioinfo[irq]->opm = 0;
ioinfo[irq]->ui.flags.oper = 0;
printk(KERN_WARNING
"No logical path for sch %d...n",
irq);
if (old_opm &&
was_oper &&
ioinfo[irq]->ui.flags.ready) {
#ifdef CONFIG_PROC_FS
if (cio_proc_devinfo)
cio_procfs_device_remove
(ioinfo[irq]->devno);
#endif /* CONFIG_PROC_FS */
free_irq( irq, ioinfo[irq]->irq_desc.dev_id);
if (nopfunc)
nopfunc( irq, DEVSTAT_DEVICE_GONE);
}
ret = -ENODEV;
} else if (!old_opm) {
/*
* check for opm...
*/
ioinfo[irq]->opm = ioinfo[irq]->schib.pmcw.pim
& ioinfo[irq]->schib.pmcw.pam
& ioinfo[irq]->schib.pmcw.pom;
if (ioinfo[irq]->opm) {
devreg_t *pdevreg;
ioinfo[irq]->ui.flags.oper = 1;
pdevreg = s390_search_devreg( ioinfo[irq] );
if (pdevreg)
if (pdevreg->oper_func)
pdevreg->oper_func
( irq, pdevreg);
#ifdef CONFIG_PROC_FS
if (cio_proc_devinfo)
if (highest_subchannel
< MAX_CIO_PROCFS_ENTRIES) {
cio_procfs_device_create
(ioinfo[irq]->devno);
}
#endif /* CONFIG_PROC_FS */
}
ret = 0;
} else {
ret = 0;
}
#endif /* CONFIG_CHSC */
return ret;
}
ioinfo[irq]->opm = ioinfo[irq]->schib.pmcw.pim
& ioinfo[irq]->schib.pmcw.pam & ioinfo[irq]->schib.pmcw.pom;
#ifdef CONFIG_CHSC
if (ioinfo[irq]->opm) {
for (chp=0;chp<=7;chp++) {
mask = 0x80 >> chp;
if (ioinfo[irq]->opm & mask) {
if (!test_bit
(ioinfo[irq]->schib.pmcw.chpid[chp],
&chpids_logical)) {
/* disable using this path */
ioinfo[irq]->opm &= ~mask;
}
}
}
}
if ((ioinfo[irq]->opm == 0) && (old_opm)) {
not_oper_handler_func_t nopfunc=ioinfo[irq]->nopfunc;
int was_oper = ioinfo[irq]->ui.flags.ready;
ioinfo[irq]->ui.flags.oper = 0;
printk(KERN_WARNING "No logical path for sch %d...n",irq);
if (was_oper && ioinfo[irq]->ui.flags.oper) {
#ifdef CONFIG_PROC_FS
if (cio_proc_devinfo)
cio_procfs_device_remove(ioinfo[irq]->devno);
#endif /* CONFIG_PROC_FS */
free_irq( irq, ioinfo[irq]->irq_desc.dev_id);
if (nopfunc)
nopfunc( irq, DEVSTAT_DEVICE_GONE);
}
return -ENODEV;
}
if (!old_opm) {
/* Hey, we have a new logical path... */
devreg_t *pdevreg;
ioinfo[irq]->ui.flags.oper = 1;
pdevreg = s390_search_devreg( ioinfo[irq] );
if (pdevreg)
if (pdevreg->oper_func)
pdevreg->oper_func( irq, pdevreg);
#ifdef CONFIG_PROC_FS
if (cio_proc_devinfo)
if (highest_subchannel < MAX_CIO_PROCFS_ENTRIES) {
cio_procfs_device_create(ioinfo[irq]->devno);
}
#endif /* CONFIG_PROC_FS */
}
#endif /* CONFIG_CHSC */
if ( ioinfo[irq]->ui.flags.pgid_supp == 0 )
return( 0); /* just exit ... */
if (usermask) {
dev_path = usermask;
} else {
dev_path = ioinfo[irq]->opm;
}
if (ioinfo[irq]->ui.flags.pgid == 0) {
memcpy (&ioinfo[irq]->pgid, global_pgid, sizeof (pgid_t));
ioinfo[irq]->ui.flags.pgid = 1;
}
for (i = 0; i < 8 && !ret; i++) {
pathmask = 0x80 >> i;
domask = dev_path & pathmask;
if (domask) {
ret = s390_SetPGID (irq, domask);
/*
* For the *first* path we are prepared
* for recovery
*
* - If we fail setting the PGID we assume its
* using a different PGID already (VM) we
* try to sense.
*/
if (ret == -EOPNOTSUPP && first) {
*(int *) &pgid = 0;
ret = s390_SensePGID (irq, domask, &pgid);
first = 0;
if (ret == 0) {
/*
* Check whether we retrieved
* a reasonable PGID ...
*/
if (pgid.inf.ps.state1 ==
SNID_STATE1_GROUPED) {
memcpy (&ioinfo[irq]->pgid,
&pgid, sizeof (pgid_t));
} else { /* ungrouped or garbage ... */
ret = -EOPNOTSUPP;
}
} else {
ioinfo[irq]->ui.flags.pgid_supp = 0;
#ifdef CONFIG_DEBUG_IO
printk (KERN_WARNING
"PathVerification(%04X) "
"- Device %04X doesn't "
" support path groupingn",
irq,
ioinfo[irq]->schib.pmcw.dev);
#endif
CIO_MSG_EVENT(2,
"PathVerification(%04X) "
"- Device %04X doesn't "
" support path groupingn",
irq,
ioinfo[irq]->schib.
pmcw.dev);
}
} else if (ret == -EIO) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"PathVerification(%04X) - I/O error "
"on device %04Xn", irq,
ioinfo[irq]->schib.pmcw.dev);
#endif
CIO_MSG_EVENT(2,
"PathVerification(%04X) - I/O error "
"on device %04Xn", irq,
ioinfo[irq]->schib.pmcw.dev);
ioinfo[irq]->ui.flags.pgid_supp = 0;
} else if (ret == -ETIMEDOUT) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"PathVerification(%04X) - I/O timed "
"out on device %04Xn",
irq,
ioinfo[irq]->schib.pmcw.dev);
#endif
CIO_MSG_EVENT(2,
"PathVerification(%04X) - I/O timed "
"out on device %04Xn", irq,
ioinfo[irq]->schib.pmcw.dev);
ioinfo[irq]->ui.flags.pgid_supp = 0;
} else if (ret == -EAGAIN) {
ret = 0;
} else if (ret == -EUSERS) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"PathVerification(%04X) "
"- Device is locked by someone else!n",
irq);
#endif
CIO_MSG_EVENT(2,
"PathVerification(%04X) "
"- Device is locked by someone else!n",
irq);
} else if (ret == -ENODEV) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"PathVerification(%04X) "
"- Device %04X is no longer there?!?n",
irq, ioinfo[irq]->schib.pmcw.dev);
#endif
CIO_MSG_EVENT(2,
"PathVerification(%04X) "
"- Device %04X is no longer there?!?n",
irq, ioinfo[irq]->schib.pmcw.dev);
} else if (ret) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_ERR
"PathVerification(%04X) "
"- Unexpected error %d on device %04Xn",
irq, ret, ioinfo[irq]->schib.pmcw.dev);
#endif
CIO_MSG_EVENT(2,
"PathVerification(%04X) - "
"Unexpected error %d on device %04Xn",
irq, ret, ioinfo[irq]->schib.pmcw.dev);
ioinfo[irq]->ui.flags.pgid_supp = 0;
}
}
}
return ret;
}
/*
* s390_SetPGID
*
* Set Path Group ID
*
*/
int
s390_SetPGID (int irq, __u8 lpm)
{
ccw1_t *spid_ccw; /* ccw area for SPID command */
devstat_t devstat; /* required by request_irq() */
devstat_t *pdevstat = &devstat;
unsigned long flags;
char dbf_txt[15];
int irq_ret = 0; /* return code */
int retry = 5; /* retry count */
int inlreq = 0; /* inline request_irq() */
int mpath = 1; /* try multi-path first */
SANITY_CHECK (irq);
if (ioinfo[irq]->ui.flags.oper == 0) {
return (-ENODEV);
}
if (ioinfo[irq]->ui.flags.unfriendly) {
/* don't even try it */
return -EUSERS;
}
sprintf (dbf_txt, "SPID%x", irq);
CIO_TRACE_EVENT (4, dbf_txt);
if (!ioinfo[irq]->ui.flags.ready) {
/*
* Perform SetPGID command processing. We have to request device
* ownership and provide a dummy I/O handler. We issue sync. I/O
* requests and evaluate the devstat area on return therefore
* we don't need a real I/O handler in place.
*/
irq_ret = request_irq (irq,
init_IRQ_handler,
SA_PROBE, "SPID", pdevstat);
if (irq_ret == 0)
inlreq = 1;
} else {
pdevstat = ioinfo[irq]->irq_desc.dev_id;
}
if (irq_ret) {
return irq_ret;
}
s390irq_spin_lock_irqsave (irq, flags);
if (init_IRQ_complete) {
spid_ccw = kmalloc (2 * sizeof (ccw1_t), GFP_DMA);
} else {
spid_ccw = alloc_bootmem_low (2 * sizeof (ccw1_t));
}
spid_ccw[0].cmd_code = CCW_CMD_SUSPEND_RECONN;
spid_ccw[0].cda = 0;
spid_ccw[0].count = 0;
spid_ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
spid_ccw[1].cmd_code = CCW_CMD_SET_PGID;
spid_ccw[1].cda = (__u32) virt_to_phys (&ioinfo[irq]->pgid);
spid_ccw[1].count = sizeof (pgid_t);
spid_ccw[1].flags = CCW_FLAG_SLI;
ioinfo[irq]->pgid.inf.fc = SPID_FUNC_MULTI_PATH | SPID_FUNC_ESTABLISH;
/*
* We now issue a SetPGID request. In case of BUSY
* or STATUS PENDING conditions we retry 5 times.
*/
do {
memset (pdevstat, '', sizeof (devstat_t));
irq_ret = s390_start_IO (irq, spid_ccw, 0xE2D7C9C4, /* == SPID */
lpm, /* n/a */
DOIO_WAIT_FOR_INTERRUPT
| DOIO_VALID_LPM
| DOIO_DONT_CALL_INTHDLR
| DOIO_TIMEOUT);
if (!irq_ret) {
if (pdevstat->flag & DEVSTAT_STATUS_PENDING) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_DEBUG "SPID - Device %04X "
"on Subchannel %04X "
"reports pending status, "
"retry : %dn",
ioinfo[irq]->schib.pmcw.dev,
irq, retry);
#endif
CIO_MSG_EVENT(2,
"SPID - Device %04X "
"on Subchannel %04X "
"reports pending status, "
"retry : %dn",
ioinfo[irq]->schib.pmcw.
dev, irq, retry);
retry--;
irq_ret = -EIO;
}
if (pdevstat->flag == (DEVSTAT_START_FUNCTION
| DEVSTAT_FINAL_STATUS)) {
retry = 0; /* successfully set ... */
irq_ret = 0;
} else if (pdevstat->flag & DEVSTAT_FLAG_SENSE_AVAIL) {
/*
* If the device doesn't support the
* Sense Path Group ID command
* further retries wouldn't help ...
*/
if (pdevstat->ii.sense.
data[0] & SNS0_CMD_REJECT) {
if (mpath) {
/*
* We now try single path mode.
* Note we must not issue the suspend
* multipath reconnect, or we will get
* a command reject by tapes.
*/
spid_ccw[0].cmd_code =
CCW_CMD_SET_PGID;
spid_ccw[0].cda = (__u32)
virt_to_phys (&ioinfo[irq]->pgid);
spid_ccw[0].count =
sizeof (pgid_t);
spid_ccw[0].flags =
CCW_FLAG_SLI;
ioinfo[irq]->pgid.inf.fc =
SPID_FUNC_SINGLE_PATH
| SPID_FUNC_ESTABLISH;
mpath = 0;
retry--;
irq_ret = -EIO;
} else {
irq_ret = -EOPNOTSUPP;
retry = 0;
}
} else {
#ifdef CONFIG_DEBUG_IO
printk (KERN_WARNING
"SPID - device %04X,"
" unit check,"
" retry %d, cnt %02d,"
" sns :"
" %02X%02X%02X%02X %02X%02X%02X%02X ...n",
ioinfo[irq]->schib.pmcw.
dev, retry,
pdevstat->scnt,
pdevstat->ii.sense.
data[0],
pdevstat->ii.sense.
data[1],
pdevstat->ii.sense.
data[2],
pdevstat->ii.sense.
data[3],
pdevstat->ii.sense.
data[4],
pdevstat->ii.sense.
data[5],
pdevstat->ii.sense.
data[6],
pdevstat->ii.sense.data[7]);
#endif
CIO_MSG_EVENT(2,
"SPID - device %04X,"
" unit check,"
" retry %d, cnt %02d,"
" sns :"
" %02X%02X%02X%02X %02X%02X%02X%02X ...n",
ioinfo[irq]->schib.
pmcw.dev, retry,
pdevstat->scnt,
pdevstat->ii.sense.
data[0],
pdevstat->ii.sense.
data[1],
pdevstat->ii.sense.
data[2],
pdevstat->ii.sense.
data[3],
pdevstat->ii.sense.
data[4],
pdevstat->ii.sense.
data[5],
pdevstat->ii.sense.
data[6],
pdevstat->ii.sense.
data[7]);
retry--;
irq_ret = -EIO;
}
} else if (pdevstat->flag & DEVSTAT_NOT_OPER) {
/* don't issue warnings during startup unless requested */
if (init_IRQ_complete || cio_notoper_msg) {
printk (KERN_WARNING
"SPID - Device %04X "
"on Subchannel %04X, "
"lpm %02X, "
"became 'not operational'n",
ioinfo[irq]->schib.pmcw.
dev, irq,
lpm);
CIO_MSG_EVENT(2,
"SPID - Device %04X "
"on Subchannel %04X, "
"lpm %02X, "
"became 'not operational'n",
ioinfo[irq]->schib.
pmcw.dev, irq,
lpm);
}
retry = 0;
ioinfo[irq]->opm &= ~lpm;
irq_ret = -EAGAIN;
}
} else if (irq_ret == -ETIMEDOUT) {
/*
* SetPGID timed out, so we cancel it before
* we retry
*/
int xret;
xret = cancel_IO(irq);
if (!xret)
CIO_MSG_EVENT(2,
"SetPGID: sch canceled "
"successfully for irq %xn",
irq);
retry--;
} else if (irq_ret != -ENODEV) {
retry--;
irq_ret = -EIO;
} else {
retry = 0;
irq_ret = -ENODEV;
}
} while (retry > 0);
if (init_IRQ_complete) {
kfree (spid_ccw);
} else {
free_bootmem ((unsigned long) spid_ccw, 2 * sizeof (ccw1_t));
}
s390irq_spin_unlock_irqrestore (irq, flags);
/*
* If we installed the irq action handler we have to
* release it too.
*/
if (inlreq)
free_irq (irq, pdevstat);
return (irq_ret);
}
/*
* s390_SensePGID
*
* Sense Path Group ID
*
*/
int
s390_SensePGID (int irq, __u8 lpm, pgid_t * pgid)
{
ccw1_t *snid_ccw; /* ccw area for SNID command */
devstat_t devstat; /* required by request_irq() */
devstat_t *pdevstat = &devstat;
char dbf_txt[15];
pgid_t * tmp_pgid;
int irq_ret = 0; /* return code */
int retry = 5; /* retry count */
int inlreq = 0; /* inline request_irq() */
unsigned long flags;
SANITY_CHECK (irq);
if (ioinfo[irq]->ui.flags.oper == 0) {
return (-ENODEV);
}
sprintf (dbf_txt, "SNID%x", irq);
CIO_TRACE_EVENT (4, dbf_txt);
if (!ioinfo[irq]->ui.flags.ready) {
/*
* Perform SENSE PGID command processing. We have to request device
* ownership and provide a dummy I/O handler. We issue sync. I/O
* requests and evaluate the devstat area on return therefore
* we don't need a real I/O handler in place.
*/
irq_ret = request_irq (irq,
init_IRQ_handler,
SA_PROBE, "SNID", pdevstat);
if (irq_ret == 0)
inlreq = 1;
} else {
pdevstat = ioinfo[irq]->irq_desc.dev_id;
}
if (irq_ret) {
return irq_ret;
}
s390irq_spin_lock_irqsave (irq, flags);
ioinfo[irq]->ui.flags.unfriendly = 0; /* assume it's friendly... */
if (init_IRQ_complete) {
snid_ccw = kmalloc (sizeof (ccw1_t), GFP_DMA);
tmp_pgid = kmalloc (sizeof (pgid_t), GFP_DMA);
} else {
snid_ccw = alloc_bootmem_low (sizeof (ccw1_t));
tmp_pgid = alloc_bootmem_low (sizeof (pgid_t));
}
snid_ccw->cmd_code = CCW_CMD_SENSE_PGID;
snid_ccw->cda = (__u32) virt_to_phys (tmp_pgid);
snid_ccw->count = sizeof (pgid_t);
snid_ccw->flags = CCW_FLAG_SLI;
/*
* We now issue a SensePGID request. In case of BUSY
* or STATUS PENDING conditions we retry 5 times.
*/
do {
memset (pdevstat, '', sizeof (devstat_t));
irq_ret = s390_start_IO (irq, snid_ccw, 0xE2D5C9C4, /* == SNID */
lpm, /* n/a */
DOIO_WAIT_FOR_INTERRUPT
| DOIO_TIMEOUT
| DOIO_VALID_LPM
| DOIO_DONT_CALL_INTHDLR);
if (irq_ret == 0) {
if (pdevstat->flag & DEVSTAT_FLAG_SENSE_AVAIL) {
/*
* If the device doesn't support the
* Sense Path Group ID command
* further retries wouldn't help ...
*/
if (pdevstat->ii.sense.data[0] &
(SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)) {
retry = 0;
irq_ret = -EOPNOTSUPP;
} else {
#ifdef CONFIG_DEBUG_IO
printk (KERN_WARNING
"SNID - device %04X,"
" unit check,"
" flag %04X, "
" retry %d, cnt %02d,"
" sns :"
" %02X%02X%02X%02X %02X%02X%02X%02X ...n",
ioinfo[irq]->schib.pmcw.
dev, pdevstat->flag,
retry, pdevstat->scnt,
pdevstat->ii.sense.
data[0],
pdevstat->ii.sense.
data[1],
pdevstat->ii.sense.
data[2],
pdevstat->ii.sense.
data[3],
pdevstat->ii.sense.
data[4],
pdevstat->ii.sense.
data[5],
pdevstat->ii.sense.
data[6],
pdevstat->ii.sense.data[7]);
#endif
CIO_MSG_EVENT(2,
"SNID - device %04X,"
" unit check,"
" flag %04X, "
" retry %d, cnt %02d,"
" sns :"
" %02X%02X%02X%02X %02X%02X%02X%02X ...n",
ioinfo[irq]->schib.
pmcw.dev,
pdevstat->flag,
retry,
pdevstat->scnt,
pdevstat->ii.sense.
data[0],
pdevstat->ii.sense.
data[1],
pdevstat->ii.sense.
data[2],
pdevstat->ii.sense.
data[3],
pdevstat->ii.sense.
data[4],
pdevstat->ii.sense.
data[5],
pdevstat->ii.sense.
data[6],
pdevstat->ii.sense.
data[7]);
retry--;
irq_ret = -EIO;
}
} else if (pdevstat->flag & DEVSTAT_NOT_OPER) {
/* don't issue warnings during startup unless requested */
if (init_IRQ_complete || cio_notoper_msg) {
printk (KERN_WARNING
"SNID - Device %04X "
"on Subchannel %04X, "
"lpm %02X, "
"became 'not operational'n",
ioinfo[irq]->schib.pmcw.
dev, irq,
lpm);
CIO_MSG_EVENT(2,
"SNID - Device %04X "
"on Subchannel %04X, "
"lpm %02X, "
"became 'not operational'n",
ioinfo[irq]->schib.
pmcw.dev, irq,
lpm);
}
retry = 0;
irq_ret = -EIO;
} else {
retry = 0; /* success ... */
irq_ret = 0;
/*
* Check if device is locked by someone else
* -- we'll fail other commands if that is
* the case
*/
if (pgid->inf.ps.state2 ==
SNID_STATE2_RESVD_ELSE) {
printk (KERN_WARNING
"SNID - Device %04X "
"on Subchannel %04X "
"is reserved by "
"someone elsen",
ioinfo[irq]->schib.pmcw.dev,
irq);
CIO_MSG_EVENT(2,
"SNID - Device %04X "
"on Subchannel %04X "
"is reserved by "
"someone elsen",
ioinfo[irq]->schib.
pmcw.dev,
irq);
ioinfo[irq]->ui.flags.unfriendly = 1;
} else {
/*
* device is friendly to us :)
*/
ioinfo[irq]->ui.flags.unfriendly = 0;
}
memcpy(pgid, tmp_pgid, sizeof(pgid_t));
}
} else if (irq_ret == -ETIMEDOUT) {
#ifdef CONFIG_DEBUG_IO
printk(KERN_INFO "SNID - Operation timed out "
"on Device %04X, Subchannel %04X... "
"cancelling IOn",
ioinfo[irq]->schib.pmcw.dev,
irq);
#endif /* CONFIG_DEBUG_IO */
CIO_MSG_EVENT(2,
"SNID - Operation timed out "
"on Device %04X, Subchannel %04X... "
"cancelling IOn",
ioinfo[irq]->schib.pmcw.dev,
irq);
cancel_IO(irq);
retry--;
} else if (irq_ret != -ENODEV) { /* -EIO, or -EBUSY */
if (pdevstat->flag & DEVSTAT_STATUS_PENDING) {
#ifdef CONFIG_DEBUG_IO
printk (KERN_INFO "SNID - Device %04X "
"on Subchannel %04X "
"reports pending status, "
"retry : %dn",
ioinfo[irq]->schib.pmcw.dev,
irq, retry);
#endif
CIO_MSG_EVENT(2,
"SNID - Device %04X "
"on Subchannel %04X "
"reports pending status, "
"retry : %dn",
ioinfo[irq]->schib.pmcw.
dev, irq, retry);
}
printk (KERN_WARNING "SNID - device %04X,"
" start_io() reports rc : %d, retrying ...n",
ioinfo[irq]->schib.pmcw.dev, irq_ret);
CIO_MSG_EVENT(2,
"SNID - device %04X,"
" start_io() reports rc : %d,"
" retrying ...n",
ioinfo[irq]->schib.pmcw.dev, irq_ret);
retry--;
irq_ret = -EIO;
} else { /* -ENODEV ... */
retry = 0;
irq_ret = -ENODEV;
}
} while (retry > 0);
if (init_IRQ_complete) {
kfree (snid_ccw);
kfree (tmp_pgid);
} else {
free_bootmem ((unsigned long) snid_ccw, sizeof (ccw1_t));
free_bootmem ((unsigned long) tmp_pgid, sizeof (pgid_t));
}
s390irq_spin_unlock_irqrestore (irq, flags);
/*
* If we installed the irq action handler we have to
* release it too.
*/
if (inlreq)
free_irq (irq, pdevstat);
return (irq_ret);
}
void
s390_process_subchannel_source (int irq)
{
int dev_oper = 0;
int dev_no = -1;
int lock = 0;
int is_owned = 0;
/*
* If the device isn't known yet
* we can't lock it ...
*/
if (ioinfo[irq] != INVALID_STORAGE_AREA) {
s390irq_spin_lock (irq);
lock = 1;
if (!ioinfo[irq]->st) {
dev_oper = ioinfo[irq]->ui.flags.oper;
if (ioinfo[irq]->ui.flags.dval)
dev_no = ioinfo[irq]->devno;
is_owned = ioinfo[irq]->ui.flags.ready;
}
}
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG
"do_crw_pending : subchannel validation - start ...n");
#endif
CIO_CRW_EVENT(4, "subchannel validation - startn");
s390_validate_subchannel (irq, is_owned);
if (irq > highest_subchannel)
highest_subchannel = irq;
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG "do_crw_pending : subchannel validation - donen");
#endif
CIO_CRW_EVENT(4, "subchannel validation - donen");
/*
* After the validate processing
* the ioinfo control block
* should be allocated ...
*/
if (lock) {
s390irq_spin_unlock (irq);
}
if (ioinfo[irq] != INVALID_STORAGE_AREA) {
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG "do_crw_pending : ioinfo at "
#ifdef CONFIG_ARCH_S390X
"%08lXn", (unsigned long) ioinfo[irq]
#else /* CONFIG_ARCH_S390X */
"%08Xn", (unsigned) ioinfo[irq]
#endif /* CONFIG_ARCH_S390X */
);
#endif
#ifdef CONFIG_ARCH_S390X
CIO_CRW_EVENT(4, "ioinfo at %08lXn",
(unsigned long)ioinfo[irq]);
#else /* CONFIG_ARCH_S390X */
CIO_CRW_EVENT(4, "ioinfo at %08Xn",
(unsigned)ioinfo[irq]);
#endif /* CONFIG_ARCH_S390X */
if (ioinfo[irq]->st)
return;
if (ioinfo[irq]->ui.flags.oper == 0) {
not_oper_handler_func_t nopfunc = ioinfo[irq]->nopfunc;
#ifdef CONFIG_PROC_FS
/* remove procfs entry */
if (cio_proc_devinfo)
cio_procfs_device_remove (dev_no);
#endif
/*
* If the device has gone
* call not oper handler
*/
if ((dev_oper == 1)
&& (nopfunc != NULL)) {
free_irq (irq, ioinfo[irq]->irq_desc.dev_id);
nopfunc (irq, DEVSTAT_DEVICE_GONE);
}
} else {
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG
"do_crw_pending : device "
"recognition - start ...n");
#endif
CIO_CRW_EVENT( 4,
"device recognition - startn");
s390_device_recognition_irq (irq);
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG
"do_crw_pending : device "
"recognition - donen");
#endif
CIO_CRW_EVENT( 4,
"device recognition - donen");
/*
* the device became operational
*/
if (dev_oper == 0) {
devreg_t *pdevreg;
pdevreg = s390_search_devreg (ioinfo[irq]);
if (pdevreg != NULL) {
if (pdevreg->oper_func != NULL)
pdevreg->
oper_func (irq, pdevreg);
}
#ifdef CONFIG_PROC_FS
/* add new procfs entry */
if (cio_proc_devinfo)
if (highest_subchannel <
MAX_CIO_PROCFS_ENTRIES) {
cio_procfs_device_create
(ioinfo[irq]->devno);
}
#endif
}
/*
* ... it is and was operational, but
* the devno may have changed
*/
else if ((ioinfo[irq]->devno != dev_no)
&& (ioinfo[irq]->nopfunc != NULL)) {
#ifdef CONFIG_PROC_FS
int devno_old = ioinfo[irq]->devno;
#endif
ioinfo[irq]->nopfunc (irq, DEVSTAT_REVALIDATE);
#ifdef CONFIG_PROC_FS
/* remove old entry, add new */
if (cio_proc_devinfo) {
cio_procfs_device_remove (devno_old);
cio_procfs_device_create
(ioinfo[irq]->devno);
}
#endif
}
}
#ifdef CONFIG_PROC_FS
/* get rid of dead procfs entries */
if (cio_proc_devinfo)
cio_procfs_device_purge ();
#endif
}
}
#ifdef CONFIG_CHSC
static int
chsc_get_sch_desc_irq(int irq)
{
int j = 0;
int ccode;
spin_lock(&chsc_lock_ssd);
if (!chsc_area_ssd)
chsc_area_ssd = kmalloc(sizeof(chsc_area_t),GFP_KERNEL);
if (!chsc_area_ssd) {
printk( KERN_CRIT "No memory to determine sch descriptions...n");
spin_unlock(&chsc_lock_ssd);
return -ENOMEM;
}
memset(chsc_area_ssd, 0, sizeof(chsc_area_t));
chsc_area_ssd->request_block.command_code1=0x0010;
chsc_area_ssd->request_block.command_code2=0x0004;
chsc_area_ssd->request_block.request_block_data.ssd_req.f_sch=irq;
chsc_area_ssd->request_block.request_block_data.ssd_req.l_sch=irq;
ccode = chsc(chsc_area_ssd);
#ifdef CONFIG_DEBUG_CHSC
if (ccode)
printk( KERN_DEBUG "chsc returned with ccode = %dn",ccode);
#endif /* CONFIG_DEBUG_CHSC */
if (!ccode) {
if (chsc_area_ssd->response_block.response_code == 0x0003) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_WARNING "Error in chsc request block!n");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2, "Error in chsc request block!n");
spin_unlock(&chsc_lock_ssd);
return -EINVAL;
} else if (chsc_area_ssd->response_block.response_code == 0x0004) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_WARNING "Model does not provide ssdn");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2, "Model does not provide ssdn");
spin_unlock(&chsc_lock_ssd);
return -EOPNOTSUPP;
} else if (chsc_area_ssd->response_block.response_code == 0x0002) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_WARNING "chsc: Invalid command!n");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2,
"chsc: Invalid command!n");
return -EINVAL;
} else if (chsc_area_ssd->response_block.response_code == 0x0001) {
/* everything ok */
switch (chsc_area_ssd->response_block.response_block_data.ssd_res.st) {
case 0: /* I/O subchannel */
/*
* All fields have meaning
*/
#ifdef CONFIG_DEBUG_CHSC
if (cio_show_msg)
printk( KERN_DEBUG
"ssd: sch %x is I/O subchanneln",
irq);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 6,
"ssd: sch %x is I/O subchanneln",
irq);
if (ioinfo[irq] == INVALID_STORAGE_AREA)
/* FIXME: we should do device rec. here... */
break;
ioinfo[irq]->ssd_info.valid = 1;
ioinfo[irq]->ssd_info.type = 0;
for (j=0;j<8;j++) {
if ((0x80 >> j) &
chsc_area_ssd->response_block.
response_block_data.ssd_res.path_mask &
chsc_area_ssd->response_block.
response_block_data.ssd_res.fla_valid_mask) {
if (chsc_area_ssd->response_block.
response_block_data.ssd_res.chpid[j])
if (!test_and_set_bit
(chsc_area_ssd->response_block.
response_block_data.
ssd_res.chpid[j],
&chpids_known))
if (test_bit
(chsc_area_ssd->response_block.
response_block_data.
ssd_res.chpid[j],
&chpids_logical))
set_bit(chsc_area_ssd->response_block.
response_block_data.
ssd_res.chpid[j],
&chpids);
ioinfo[irq]->ssd_info.chpid[j] =
chsc_area_ssd->response_block.
response_block_data.ssd_res.chpid[j];
ioinfo[irq]->ssd_info.fla[j] =
chsc_area_ssd->response_block.
response_block_data.ssd_res.fla[j];
}
}
break;
case 1: /* CHSC subchannel */
/*
* Only sch_val, st and sch have meaning
*/
#ifdef CONFIG_DEBUG_CHSC
if (cio_show_msg)
printk( KERN_DEBUG
"ssd: sch %x is chsc subchanneln",
irq);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 6,
"ssd: sch %x is chsc subchanneln",
irq);
if (ioinfo[irq] == INVALID_STORAGE_AREA)
/* FIXME: we should do device rec. here... */
break;
ioinfo[irq]->ssd_info.valid = 1;
ioinfo[irq]->ssd_info.type = 1;
break;
case 2: /* Message subchannel */
/*
* All fields except unit_addr have meaning
*/
#ifdef CONFIG_DEBUG_CHSC
if (cio_show_msg)
printk( KERN_DEBUG
"ssd: sch %x is message subchanneln",
irq);
#endif
CIO_CRW_EVENT( 6,
"ssd: sch %x is message subchanneln",
irq);
if (ioinfo[irq] == INVALID_STORAGE_AREA)
/* FIXME: we should do device rec. here... */
break;
ioinfo[irq]->ssd_info.valid = 1;
ioinfo[irq]->ssd_info.type = 2;
for (j=0;j<8;j++) {
if ((0x80 >> j) &
chsc_area_ssd->response_block.
response_block_data.ssd_res.path_mask &
chsc_area_ssd->response_block.
response_block_data.ssd_res.fla_valid_mask) {
if (chsc_area_ssd->response_block.
response_block_data.ssd_res.chpid[j])
if (!test_and_set_bit
(chsc_area_ssd->response_block.
response_block_data.
ssd_res.chpid[j],
&chpids_known))
if (test_bit
(chsc_area_ssd->response_block.
response_block_data.
ssd_res.chpid[j],
&chpids_logical))
set_bit(chsc_area_ssd->response_block.
response_block_data.
ssd_res.chpid[j],
&chpids);
ioinfo[irq]->ssd_info.chpid[j] =
chsc_area_ssd->response_block.
response_block_data.ssd_res.chpid[j];
ioinfo[irq]->ssd_info.fla[j] =
chsc_area_ssd->response_block.
response_block_data.ssd_res.fla[j];
}
}
break;
case 3: /* ADM subchannel */
/*
* Only sch_val, st and sch have meaning
*/
#ifdef CONFIG_DEBUG_CHSC
if (cio_show_msg)
printk( KERN_DEBUG
"ssd: sch %x is ADM subchanneln",
irq);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 6,
"ssd: sch %x is ADM subchanneln",
irq);
if (ioinfo[irq] == INVALID_STORAGE_AREA)
/* FIXME: we should do device rec. here... */
break;
ioinfo[irq]->ssd_info.valid = 1;
ioinfo[irq]->ssd_info.type = 3;
break;
default: /* uhm, that looks strange... */
#ifdef CONFIG_DEBUG_CHSC
if (cio_show_msg)
printk( KERN_DEBUG
"Strange subchannel type %d for sch %xn",
chsc_area_ssd->response_block.
response_block_data.ssd_res.st,
irq);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 0,
"Strange subchannel type %d for "
"sch %xn",
chsc_area_ssd->response_block.
response_block_data.ssd_res.st,
irq);
}
spin_unlock(&chsc_lock_ssd);
return 0;
}
} else {
spin_unlock(&chsc_lock_ssd);
if (ccode == 3)
return -ENODEV;
return -EBUSY;
}
return -EIO;
}
static int
chsc_get_sch_descriptions( void )
{
int irq = 0;
int err = 0;
CIO_TRACE_EVENT( 4, "gsdesc");
/*
* get information about chpids and link addresses
* by executing the chsc command 'store subchannel description'
*/
if (init_IRQ_complete) {
for (irq=0; irq<=highest_subchannel; irq++) {
/*
* retrieve information for each sch
*/
err = chsc_get_sch_desc_irq(irq);
if (err) {
if (!cio_chsc_err_msg) {
printk( KERN_ERR
"chsc_get_sch_descriptions:"
" Error %d while doing chsc; "
"processing "
"some machine checks may "
"not workn",
err);
cio_chsc_err_msg=1;
}
return err;
}
}
cio_chsc_desc_avail = 1;
return 0;
} else {
/* Paranoia... */
printk( KERN_ERR
"Error: chsc_get_sch_descriptions called before "
"initialization completen");
return -EINVAL;
}
}
__initcall(chsc_get_sch_descriptions);
void
s390_do_chpid_processing( __u8 chpid)
{
int irq;
int j;
int mask;
char dbf_txt[15];
int ccode;
int was_oper;
int chp = 0;
int mask2;
int ret = 0;
sprintf(dbf_txt, "chpr%x", chpid);
CIO_TRACE_EVENT( 2, dbf_txt);
/*
* TODO: the chpid may be not the chpid with the link incident,
* but the chpid the report came in through. How to handle???
*/
clear_bit(chpid, &chpids);
if (!test_and_clear_bit(chpid, &chpids_known))
return; /* we didn't know the chpid anyway */
for (irq=0;irq<=highest_subchannel;irq++) {
if (ioinfo[irq] == INVALID_STORAGE_AREA)
continue; /* we don't know the device anyway */
if (ioinfo[irq]->st)
continue; /* non-io subchannel */
for (j=0; j<8;j++) {
if (ioinfo[irq]->schib.pmcw.chpid[j] == chpid) {
/*
* Send nops down each path to find out
* which path is gone (ssch will yield cc=3
* and the path will be switched off in the opm)
*/
/*
* Note: irq spinlock is grabbed several times
* in here
*/
for (chp=0;chp<=7;chp++) {
mask2 = 0x80 >> chp;
if (mask2 & ioinfo[irq]->opm)
ret = s390_send_nop (irq, mask2);
}
s390irq_spin_lock(irq);
/*
* FIXME: is this neccessary?
*/
ccode = stsch(irq, &ioinfo[irq]->schib);
if (ccode) {
#ifdef CONFIG_DEBUG_CRW
printk( KERN_WARNING
"do_crw_pending: device on "
"sch %x is not operationaln",
irq);
#endif /* CONFIG_DEBUG_CRW */
CIO_CRW_EVENT( 2,
"device on sch %x is "
"not operationaln",
irq);
ioinfo[irq]->ui.flags.oper = 0;
break;
}
ioinfo[irq]->opm = ioinfo[irq]->schib.pmcw.pim &
ioinfo[irq]->schib.pmcw.pam &
ioinfo[irq]->schib.pmcw.pom;
if (ioinfo[irq]->opm) {
for (chp=0;chp<=7;chp++) {
mask2 = 0x80 >> chp;
if (ioinfo[irq]->opm & mask2) {
if (!test_bit
(ioinfo[irq]->
schib.pmcw.chpid[chp],
&chpids_logical)) {
/* disable using this path */
ioinfo[irq]->opm
&= ~mask2;
}
}
}
}
if (!ioinfo[irq]->opm) {
/*
* sh*t, our last path has gone...
* Set the device status to not operational
* and eventually notify the device driver
*/
#ifdef CONFIG_DEBUG_CRW
printk( KERN_WARNING
"do_crw_pending: Last path gone for "
"device %x, sch %xn",
ioinfo[irq]->devno, irq);
#endif /* CONFIG_DEBUG_CRW */
CIO_CRW_EVENT( 2,
"Last path gone for "
"device %x, sch %xn",
ioinfo[irq]->devno,
irq);
was_oper = ioinfo[irq]->ui.flags.oper;
ioinfo[irq]->ui.flags.oper = 0;
if (was_oper && ioinfo[irq]->ui.flags.ready) {
not_oper_handler_func_t nopfunc =
ioinfo[irq]->nopfunc;
#ifdef CONFIG_PROC_FS
if (cio_proc_devinfo)
cio_procfs_device_remove
(ioinfo[irq]->devno);
#endif /* CONFIG_PROC_FS */
free_irq(irq,
ioinfo[irq]->irq_desc.dev_id);
if (nopfunc)
nopfunc(irq,
DEVSTAT_DEVICE_GONE);
}
} else if (ioinfo[irq]->ui.flags.ready) {
/*
* Re-do path verification for the chpid in question
* FIXME: is this neccessary?
*/
mask = 0x80 >> j;
if (!s390_DevicePathVerification(irq,mask)) {
#ifdef CONFIG_DEBUG_CRW
printk( KERN_DEBUG
"DevicePathVerification "
"successful for"
" Subchannel %x, "
"chpid %xn",
irq, chpid);
#endif /* CONFIG_DEBUG_CRW */
CIO_CRW_EVENT( 2,
"DevicePathVerification "
"successful for"
" Subchannel %x, "
"chpid %xn",
irq, chpid);
}
}
j=8;
s390irq_spin_unlock(irq);
}
}
}
}
void
s390_do_res_acc_processing( __u8 chpid, __u16 fla, int info)
{
char dbf_txt[15];
int irq = 0;
int ccode;
__u32 fla_mask = 0xffff;
int chp;
int mask, mask2;
int ret;
sprintf(dbf_txt, "accp%x", chpid);
CIO_TRACE_EVENT( 2, dbf_txt);
if (info != CHSC_SEI_ACC_CHPID) {
sprintf(dbf_txt, "fla%x", fla);
CIO_TRACE_EVENT( 2, dbf_txt);
}
sprintf(dbf_txt, "info:%d", info);
CIO_TRACE_EVENT( 2, dbf_txt);
/*
* I/O resources may have become accessible.
* Scan through all subchannels that may be concerned and
* do a validation on those.
* The more information we have (info), the less scanning
* will we have to do.
*/
if (!cio_chsc_desc_avail)
chsc_get_sch_descriptions();
if (!cio_chsc_desc_avail) {
/*
* Something went wrong...
*/
#ifdef CONFIG_DEBUG_CRW
printk( KERN_WARNING
"Error: Could not retrieve subchannel descriptions, "
"will not process css machine check...n");
#endif /* CONFIG_DEBUG_CRW */
CIO_CRW_EVENT( 0,
"Error: Could not retrieve subchannel descriptions, "
"will not process css machine check...n");
return;
}
if (!test_bit(chpid, &chpids_logical))
return; /* no need to do the rest */
switch (info) {
case CHSC_SEI_ACC_CHPID: /*
* worst case, we only know about the chpid
* the devices are attached to
*/
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG "Looking at chpid %x...n", chpid);
#endif /* CONFIG_DEBUG_CHSC */
for (irq=0; irq<=__MAX_SUBCHANNELS; irq++) {
if((ioinfo[irq] != INVALID_STORAGE_AREA)
&& (!ioinfo[irq]->st)) {
/*
* Send nops down each path to find out
* which path is there
*/
for (chp=0;chp<=7;chp++) {
mask = 0x80 >> chp;
/*
* check if chpid is in information
* updated by ssd
*/
if ((ioinfo[irq]->ssd_info.valid) &&
(ioinfo[irq]->ssd_info.chpid[chp]
== chpid))
ret = s390_send_nop (irq, mask);
}
ccode = stsch(irq, &ioinfo[irq]->schib);
if (!ccode) {
ioinfo[irq]->opm =
ioinfo[irq]->schib.pmcw.pim &
ioinfo[irq]->schib.pmcw.pam &
ioinfo[irq]->schib.pmcw.pom;
if (ioinfo[irq]->opm) {
for (chp=0;chp<=7;chp++) {
mask = 0x80 >> chp;
if (ioinfo[irq]->opm
& mask) {
if (!test_bit
(ioinfo[irq]->
schib.pmcw.chpid[chp],
&chpids_logical)) {
/* disable using this path */
ioinfo[irq]->opm
&= ~mask;
}
}
}
}
if ((ioinfo[irq]->ui.flags.ready)
&& (chpid & ioinfo[irq]->opm))
s390_DevicePathVerification(irq, chpid);
} else {
ioinfo[irq]->ui.flags.oper = 0;
}
} else if (ioinfo[irq] == INVALID_STORAGE_AREA) {
/*
* We don't know the device yet, but since a path
* may be available now to the device we'll have
* to do recognition again.
* Since we don't have any idea about which chpid
* that beast may be on we'll have to do a stsch
* on all devices, grr...
*/
int valret = 0;
valret = s390_validate_subchannel(irq,0);
if (valret == -ENXIO) {
/* We're through */
return;
}
if (irq > highest_subchannel)
highest_subchannel = irq;
if (valret == 0)
s390_device_recognition_irq(irq);
}
}
break;
case CHSC_SEI_ACC_LINKADDR: /*
* better, we know the link determined by
* the link address and the chpid
*/
fla_mask = 0xff00;
/* fallthrough */
case CHSC_SEI_ACC_FULLLINKADDR: /*
* best case, we know the CU image
* by chpid and full link address
*/
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG "Looking at chpid %x, link addr %x...n",
chpid, fla);
#endif /* CONFIG_DEBUG_CHSC */
for (irq=0; irq<=__MAX_SUBCHANNELS; irq++) {
/*
* Walk through all subchannels and
* look if our chpid and our (masked) link
* address are in somewhere
* Do a stsch for the found subchannels and
* perform path grouping
*/
if ((ioinfo[irq] != INVALID_STORAGE_AREA)
&& (!ioinfo[irq]->st)) {
int j;
/* Update our ssd_info */
if (chsc_get_sch_desc_irq(irq))
break;
for (j=0;j<8;j++) {
if ((ioinfo[irq]->ssd_info.chpid[j] == chpid) &&
((ioinfo[irq]->ssd_info.fla[j]&fla_mask) == fla)) {
mask2 = 0x80 >> j;
ret = s390_send_nop (irq, mask2);
ccode = stsch(irq,&ioinfo[irq]->schib);
if (!ccode) {
ioinfo[irq]->opm =
ioinfo[irq]->schib.pmcw.pim &
ioinfo[irq]->schib.pmcw.pam &
ioinfo[irq]->schib.pmcw.pom;
if (ioinfo[irq]->opm) {
for (chp=0;chp<=7;chp++) {
mask = 0x80 >> chp;
if (ioinfo[irq]->opm
& mask) {
if (!test_bit
(ioinfo[irq]->
schib.pmcw.chpid[chp],
&chpids_logical)) {
/* disable using this path */
ioinfo[irq]->opm
&= ~mask;
}
}
}
}
if (ioinfo[irq]->ui.flags.ready)
s390_DevicePathVerification(irq, chpid);
}
break;
}
}
} else if (ioinfo[irq] == INVALID_STORAGE_AREA) {
/* The full program again (see above), grr... */
int valret = 0;
valret = s390_validate_subchannel(irq,0);
if (valret == -ENXIO) {
/* We're done */
return;
}
if (irq > highest_subchannel)
highest_subchannel = irq;
if (valret == 0)
s390_device_recognition_irq(irq);
}
}
break;
default: BUG();
}
}
void
s390_process_css( void )
{
int ccode;
CIO_TRACE_EVENT( 2, "prcss");
spin_lock(&chsc_lock_sei);
if (!chsc_area_sei) {
if (init_IRQ_complete)
chsc_area_sei = kmalloc(sizeof(chsc_area_t),GFP_KERNEL);
else
chsc_area_sei = alloc_bootmem(sizeof(chsc_area_t));
}
if (!chsc_area_sei) {
printk( KERN_CRIT
"No memory to store event information...n");
spin_unlock(&chsc_lock_sei);
return;
}
/*
* build the chsc request block for store event information
* and do the call
*/
memset(chsc_area_sei,0,sizeof(chsc_area_t));
chsc_area_sei->request_block.command_code1=0x0010;
chsc_area_sei->request_block.command_code2=0x000E;
ccode = chsc(chsc_area_sei);
if (!ccode) {
/* for debug purposes, check for problems */
if (chsc_area_sei->response_block.response_code == 0x0003) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_WARNING
"s390_process_css: error in chsc request block!n");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2,
"s390_process_css: "
"error in chsc request block!n");
} else if (chsc_area_sei->response_block.response_code == 0x0005) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_WARNING
"s390_process_css: no event information storedn");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2,
"s390_process_css: "
"no event information storedn");
} else if (chsc_area_sei->response_block.response_code == 0x0002) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_WARNING
"s390_process_css: invalid command!n");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2,
"s390_process_css: "
"invalid command!n");
} else if (chsc_area_sei->response_block.response_code == 0x0001) {
/* everything ok */
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"s390_process_css: "
"event information successfully storedn");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 4,
"s390_process_css: "
"event information successfully storedn");
if (chsc_area_sei->response_block.
response_block_data.sei_res.rs != 4) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_ERR
"s390_process_css: "
"reporting source (%04X) isn't a chpid!"
"Aborting processing of machine check...n",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 2,
"s390_process_css: "
"reporting source (%04X) isn't a chpid!"
"Aborting processing of machine check...n",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid);
return;
}
/* which kind of information was stored? */
switch (chsc_area_sei->response_block.
response_block_data.sei_res.cc) {
case 1: /* link incident*/
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"s390_process_css: "
"channel subsystem reports link incident,"
" source is chpid %xn",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 4,
"s390_process_css: "
"channel subsystem reports "
"link incident, "
"source is chpid %xn",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid);
s390_do_chpid_processing(chsc_area_sei->response_block.
response_block_data.sei_res.rsid);
break;
case 2: /* i/o resource accessibiliy */
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"s390_process_css: channel subsystem "
"reports some I/O devices "
"may have become accessablen");
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 4,
"s390_process_css: "
"channel subsystem reports "
"some I/O devices "
"may have become accessablen");
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"Data received after sei: n");
printk( KERN_DEBUG
"Validity flags: %xn",
chsc_area_sei->response_block.
response_block_data.sei_res.vf);
#endif /* CONFIG_DEBUG_CHSC */
if ((chsc_area_sei->response_block.
response_block_data.sei_res.vf&0x80)
== 0) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG "chpid: %xn",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid);
#endif /* CONFIG_DEBUG_CHSC */
s390_do_res_acc_processing
(chsc_area_sei->response_block.
response_block_data.sei_res.rsid,
0,
CHSC_SEI_ACC_CHPID);
} else if ((chsc_area_sei->response_block.
response_block_data.sei_res.vf&0xc0)
== 0x80) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"chpid: %x link addr: %xn",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid,
chsc_area_sei->response_block.
response_block_data.sei_res.fla);
#endif /* CONFIG_DEBUG_CHSC */
s390_do_res_acc_processing
(chsc_area_sei->response_block.
response_block_data.sei_res.rsid,
chsc_area_sei->response_block.
response_block_data.sei_res.fla,
CHSC_SEI_ACC_LINKADDR);
} else if ((chsc_area_sei->response_block.
response_block_data.sei_res.vf & 0xc0)
== 0xc0) {
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"chpid: %x "
"full link addr: %xn",
chsc_area_sei->response_block.
response_block_data.sei_res.rsid,
chsc_area_sei->response_block.
response_block_data.sei_res.fla);
#endif /* CONFIG_DEBUG_CHSC */
s390_do_res_acc_processing
(chsc_area_sei->response_block.
response_block_data.sei_res.rsid,
chsc_area_sei->response_block.
response_block_data.sei_res.fla,
CHSC_SEI_ACC_FULLLINKADDR);
}
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG "n");
#endif /* CONFIG_DEBUG_CHSC */
break;
default: /* other stuff */
#ifdef CONFIG_DEBUG_CHSC
printk( KERN_DEBUG
"s390_process_css: event %dn",
chsc_area_sei->response_block.
response_block_data.sei_res.cc);
#endif /* CONFIG_DEBUG_CHSC */
CIO_CRW_EVENT( 4,
"s390_process_css: event %dn",
chsc_area_sei->response_block.
response_block_data.sei_res.cc);
break;
}
}
}
spin_unlock(&chsc_lock_sei);
}
#endif
/*
* s390_do_crw_pending
*
* Called by the machine check handler to process CRW pending
* conditions. It may be a single CRW, or CRWs may be chained.
*
* Note : we currently process CRWs for subchannel source only
*/
void
s390_do_crw_pending (crwe_t * pcrwe)
{
int irq;
int chpid;
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG "do_crw_pending : starting ...n");
#endif
CIO_CRW_EVENT( 2, "do_crw_pending: startingn");
while (pcrwe != NULL) {
switch (pcrwe->crw.rsc) {
case CRW_RSC_SCH:
irq = pcrwe->crw.rsid;
#ifdef CONFIG_DEBUG_CRW
printk (KERN_NOTICE "do_crw_pending : source is "
"subchannel %04Xn", irq);
#endif
CIO_CRW_EVENT(2, "source is subchannel %04Xn",
irq);
s390_process_subchannel_source (irq);
break;
case CRW_RSC_MONITOR:
#ifdef CONFIG_DEBUG_CRW
printk (KERN_NOTICE "do_crw_pending : source is "
"monitoring facilityn");
#endif
CIO_CRW_EVENT(2, "source is monitoring facilityn");
break;
case CRW_RSC_CPATH:
chpid = pcrwe->crw.rsid;
#ifdef CONFIG_DEBUG_CRW
printk (KERN_NOTICE "do_crw_pending : source is "
"channel path %02Xn", chpid);
#endif
CIO_CRW_EVENT(2, "source is channel path %02Xn");
break;
case CRW_RSC_CONFIG:
#ifdef CONFIG_DEBUG_CRW
printk (KERN_NOTICE "do_crw_pending : source is "
"configuration-alert facilityn");
#endif
CIO_CRW_EVENT(2, "source is configuration-alert facilityn");
break;
case CRW_RSC_CSS:
#ifdef CONFIG_DEBUG_CRW
printk (KERN_NOTICE "do_crw_pending : source is "
"channel subsystemn");
#endif
CIO_CRW_EVENT(2, "source is channel subsystemn");
#ifdef CONFIG_CHSC
s390_process_css();
#endif
break;
default:
#ifdef CONFIG_DEBUG_CRW
printk (KERN_NOTICE
"do_crw_pending : unknown sourcen");
#endif
CIO_CRW_EVENT( 2, "unknown sourcen");
break;
}
pcrwe = pcrwe->crwe_next;
}
#ifdef CONFIG_DEBUG_CRW
printk (KERN_DEBUG "do_crw_pending : donen");
#endif
CIO_CRW_EVENT(2, "do_crw_pending: donen");
return;
}
/* added by Holger Smolinski for reipl support in reipl.S */
extern void do_reipl (int);
void
reipl (int sch)
{
int i;
s390_dev_info_t dev_info;
for (i = 0; i <= highest_subchannel; i++) {
if (get_dev_info_by_irq (i, &dev_info) == 0
&& (dev_info.status & DEVSTAT_DEVICE_OWNED)) {
free_irq (i, ioinfo[i]->irq_desc.dev_id);
}
}
if (MACHINE_IS_VM)
cpcmd ("IPL", NULL, 0);
else
do_reipl (0x10000 | sch);
}
/*
* Function: cio_debug_init
* Initializes three debug logs (under /proc/s390dbf) for common I/O:
* - cio_msg logs the messages which are printk'ed when CONFIG_DEBUG_IO is on
* - cio_trace logs the calling of different functions
* - cio_crw logs the messages which are printk'ed when CONFIG_DEBUG_CRW is on
* debug levels depend on CONFIG_DEBUG_IO resp. CONFIG_DEBUG_CRW
*/
int
cio_debug_init (void)
{
int ret = 0;
cio_debug_msg_id = debug_register ("cio_msg", 4, 4, 16 * sizeof (long));
if (cio_debug_msg_id != NULL) {
debug_register_view (cio_debug_msg_id, &debug_sprintf_view);
debug_set_level (cio_debug_msg_id, 6);
} else {
ret = -1;
}
cio_debug_trace_id = debug_register ("cio_trace", 4, 4, 8);
if (cio_debug_trace_id != NULL) {
debug_register_view (cio_debug_trace_id, &debug_hex_ascii_view);
debug_set_level (cio_debug_trace_id, 6);
} else {
ret = -1;
}
cio_debug_crw_id = debug_register ("cio_crw", 2, 4, 16 * sizeof (long));
if (cio_debug_crw_id != NULL) {
debug_register_view (cio_debug_crw_id, &debug_sprintf_view);
debug_set_level (cio_debug_crw_id, 6);
} else {
ret = -1;
}
if (ret)
return ret;
cio_debug_initialized = 1;
return 0;
}
__initcall (cio_debug_init);
#ifdef CONFIG_PROC_FS
#ifdef CONFIG_CHSC
/*
* Function: cio_parse_chpids_proc_parameters
* parse the stuff piped to /proc/chpids
*/
void
cio_parse_chpids_proc_parameters(char* buf)
{
int i;
int cp;
int ret;
if (strstr(buf, "on ")) {
for (i=0; i<3; i++) {
buf++;
}
cp = blacklist_strtoul(buf, &buf);
chsc_get_sch_descriptions();
if (!cio_chsc_desc_avail) {
printk(KERN_ERR "Could not get chpid status, "
"vary on/off not availablen");
return;
}
if (!test_bit(cp, &chpids)) {
ret = s390_vary_chpid(cp, 1);
if (ret == -EINVAL) {
#ifdef CONFIG_DEBUG_CHSC
printk(KERN_ERR "/proc/chpids: "
"Invalid chpid specifiedn");
#else /* CONFIG_DEBUG_CHSC */
printk(KERN_DEBUG "/proc/chpids: "
"Invalid chpid specifiedn");
#endif /* CONFIG_DEBUG_CHSC */
} else if (ret == 0) {
printk(KERN_INFO "/proc/chpids: "
"Varied chpid %x logically onlinen",
cp);
}
} else {
printk(KERN_ERR "/proc/chpids: chpid %x is "
"already onlinen",
cp);
}
} else if (strstr(buf, "off ")) {
for (i=0; i<4; i++) {
buf++;
}
cp = blacklist_strtoul(buf, &buf);
chsc_get_sch_descriptions();
if (!cio_chsc_desc_avail) {
printk(KERN_ERR "Could not get chpid status, "
"vary on/off not availablen");
return;
}
if (test_bit(cp, &chpids)) {
ret = s390_vary_chpid(cp, 0);
if (ret == -EINVAL) {
#ifdef CONFIG_DEBUG_CHSC
printk(KERN_ERR "/proc/chpids: "
"Invalid chpid specifiedn");
#else /* CONFIG_DEBUG_CHSC */
printk(KERN_DEBUG "/proc/chpids: "
"Invalid chpid specifiedn");
#endif /* CONFIG_DEBUG_CHSC */
} else if (ret == 0) {
printk(KERN_INFO "/proc/chpids: "
"Varied chpid %x logically offlinen",
cp);
}
} else {
printk(KERN_ERR "/proc/chpids: "
"chpid %x is already offlinen",
cp);
}
} else {
printk(KERN_ERR "/proc/chpids: Parse error; "
"try using '{on,off} <chpid>'n");
}
}
/*
* Function: s390_vary_chpid
* Varies the specified chpid online or offline
*/
int
s390_vary_chpid( __u8 chpid, int on)
{
char dbf_text[15];
int irq;
if ((chpid <=0) || (chpid >= NR_CHPIDS))
return -EINVAL;
sprintf(dbf_text, on?"varyon%x":"varyoff%x", chpid);
CIO_TRACE_EVENT( 2, dbf_text);
if (!test_bit(chpid, &chpids_known)) {
printk(KERN_ERR "Can't vary unknown chpid %02Xn", chpid);
return -EINVAL;
}
if (on && test_bit(chpid, &chpids_logical)) {
printk(KERN_ERR "chpid %02X already logically onlinen",
chpid);
return -EINVAL;
}
if (!on && !test_bit(chpid, &chpids_logical)) {
printk(KERN_ERR "chpid %02X already logically offlinen",
chpid);
return -EINVAL;
}
if (on) {
set_bit(chpid, &chpids_logical);
set_bit(chpid, &chpids);
} else {
clear_bit(chpid, &chpids_logical);
clear_bit(chpid, &chpids);
}
/*
* Redo PathVerification on the devices the chpid connects to
*/
for (irq=0;irq<=highest_subchannel;irq++) {
/*
* We don't need to adjust the opm, as this will be done in
* DevicePathVerification...
*/
if (ioinfo[irq] == INVALID_STORAGE_AREA)
continue;
if (ioinfo[irq]->st)
continue;
if (ioinfo[irq]->ssd_info.valid) {
if ((ioinfo[irq]->ssd_info.chpid[0] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[1] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[2] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[3] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[4] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[5] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[6] == chpid) ||
(ioinfo[irq]->ssd_info.chpid[7] == chpid)) {
#ifdef CONFIG_DEBUG_CHSC
printk(KERN_DEBUG "Calling "
"DevicePathVerification for irq %dn",
irq);
#endif /* CONFIG_DEBUG_CHSC */
s390_DevicePathVerification(irq, 0);
}
}
}
return 0;
}
#endif /* CONFIG_CHSC */
/*
* Display info on subchannels in /proc/subchannels.
* Adapted from procfs stuff in dasd.c by Cornelia Huck, 02/28/01.
*/
typedef struct {
char *data;
int len;
} tempinfo_t;
#define MIN(a,b) ((a)<(b)?(a):(b))
static struct proc_dir_entry *chan_subch_entry;
static int
chan_subch_open (struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
int i = 0;
int j = 0;
tempinfo_t *info;
info = (tempinfo_t *) vmalloc (sizeof (tempinfo_t));
if (info == NULL) {
printk (KERN_WARNING "No memory available for datan");
return -ENOMEM;
} else {
file->private_data = (void *) info;
}
size += (highest_subchannel + 1) * 128;
info->data = (char *) vmalloc (size);
if (size && info->data == NULL) {
printk (KERN_WARNING "No memory available for datan");
vfree (info);
return -ENOMEM;
}
len += sprintf (info->data + len,
"Device sch. Dev Type/Model CU in use PIM PAM POM CHPIDsn");
len += sprintf (info->data + len,
"---------------------------------------------------------------------n");
for (i = 0; i <= highest_subchannel; i++) {
if (!((ioinfo[i] == NULL) || (ioinfo[i] == INVALID_STORAGE_AREA)
|| (ioinfo[i]->st )|| !(ioinfo[i]->ui.flags.oper))) {
len +=
sprintf (info->data + len, "%04X %04X ",
ioinfo[i]->schib.pmcw.dev, i);
if (ioinfo[i]->senseid.dev_type != 0) {
len += sprintf (info->data + len,
"%04X/%02X %04X/%02X",
ioinfo[i]->senseid.dev_type,
ioinfo[i]->senseid.dev_model,
ioinfo[i]->senseid.cu_type,
ioinfo[i]->senseid.cu_model);
} else {
len += sprintf (info->data + len,
" %04X/%02X",
ioinfo[i]->senseid.cu_type,
ioinfo[i]->senseid.cu_model);
}
if (ioinfo[i]->ui.flags.ready) {
len += sprintf (info->data + len, " yes ");
} else {
len += sprintf (info->data + len, " ");
}
len += sprintf (info->data + len,
" %02X %02X %02X ",
ioinfo[i]->schib.pmcw.pim,
ioinfo[i]->schib.pmcw.pam,
ioinfo[i]->schib.pmcw.pom);
for (j = 0; j < 8; j++) {
len += sprintf (info->data + len,
"%02X",
ioinfo[i]->schib.pmcw.chpid[j]);
if (j == 3) {
len += sprintf (info->data + len, " ");
}
}
len += sprintf (info->data + len, "n");
}
}
info->len = len;
return rc;
}
static int
chan_subch_close (struct inode *inode, struct file *file)
{
int rc = 0;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (p_info) {
if (p_info->data)
vfree (p_info->data);
vfree (p_info);
}
return rc;
}
static ssize_t
chan_subch_read (struct file *file, char *user_buf, size_t user_len,
loff_t * offset)
{
loff_t len;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (*offset >= p_info->len) {
return 0;
} else {
len = MIN (user_len, (p_info->len - *offset));
if (copy_to_user (user_buf, &(p_info->data[*offset]), len))
return -EFAULT;
(*offset) += len;
return len;
}
}
static struct file_operations chan_subch_file_ops = {
read:chan_subch_read, open:chan_subch_open, release:chan_subch_close,
};
static int
chan_proc_init (void)
{
chan_subch_entry =
create_proc_entry ("subchannels", S_IFREG | S_IRUGO, &proc_root);
chan_subch_entry->proc_fops = &chan_subch_file_ops;
return 1;
}
__initcall (chan_proc_init);
void
chan_proc_cleanup (void)
{
remove_proc_entry ("subchannels", &proc_root);
}
/*
* Display device specific information under /proc/deviceinfo/<devno>
*/ static struct proc_dir_entry *cio_procfs_deviceinfo_root = NULL;
/*
* cio_procfs_device_list holds all devno-specific procfs directories
*/
typedef struct {
int devno;
struct proc_dir_entry *cio_device_entry;
struct proc_dir_entry *cio_sensedata_entry;
struct proc_dir_entry *cio_in_use_entry;
struct proc_dir_entry *cio_chpid_entry;
} cio_procfs_entry_t;
typedef struct _cio_procfs_device {
struct _cio_procfs_device *next;
cio_procfs_entry_t *entry;
} cio_procfs_device_t;
cio_procfs_device_t *cio_procfs_device_list = NULL;
/*
* File operations
*/
static int
cio_device_entry_close (struct inode *inode, struct file *file)
{
int rc = 0;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (p_info) {
if (p_info->data)
vfree (p_info->data);
vfree (p_info);
}
return rc;
}
static ssize_t
cio_device_entry_read (struct file *file, char *user_buf, size_t user_len,
loff_t * offset)
{
loff_t len;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (*offset >= p_info->len) {
return 0;
} else {
len = MIN (user_len, (p_info->len - *offset));
if (copy_to_user (user_buf, &(p_info->data[*offset]), len))
return -EFAULT;
(*offset) += len;
return len;
}
}
static int
cio_sensedata_entry_open (struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
tempinfo_t *info;
int irq;
int devno;
char *devno_str;
info = (tempinfo_t *) vmalloc (sizeof (tempinfo_t));
if (info == NULL) {
printk (KERN_WARNING "No memory available for datan");
rc = -ENOMEM;
} else {
file->private_data = (void *) info;
size += 2 * 32;
info->data = (char *) vmalloc (size);
if (size && info->data == NULL) {
printk (KERN_WARNING "No memory available for datan");
vfree (info);
rc = -ENOMEM;
} else {
devno_str = kmalloc (6 * sizeof (char), GFP_KERNEL);
memset (devno_str, 0, 6 * sizeof (char));
memcpy (devno_str,
file->f_dentry->d_parent->d_name.name,
strlen (file->f_dentry->d_parent->d_name.name) +
1);
devno = simple_strtoul (devno_str, &devno_str, 16);
irq = get_irq_by_devno (devno);
if (irq != -1) {
len +=
sprintf (info->data + len,
"Dev Type/Mod: ");
if (ioinfo[irq]->senseid.dev_type == 0) {
len +=
sprintf (info->data + len,
"%04X/%02Xn",
ioinfo[irq]->senseid.
cu_type,
ioinfo[irq]->senseid.
cu_model);
} else {
len +=
sprintf (info->data + len,
"%04X/%02Xn",
ioinfo[irq]->senseid.
dev_type,
ioinfo[irq]->senseid.
dev_model);
len +=
sprintf (info->data + len,
"CU Type/Mod: %04X/%02Xn",
ioinfo[irq]->senseid.
cu_type,
ioinfo[irq]->senseid.
cu_model);
}
}
info->len = len;
}
}
return rc;
}
static int
cio_in_use_entry_open (struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
tempinfo_t *info;
int irq;
int devno;
char *devno_str;
info = (tempinfo_t *) vmalloc (sizeof (tempinfo_t));
if (info == NULL) {
printk (KERN_WARNING "No memory available for datan");
rc = -ENOMEM;
} else {
file->private_data = (void *) info;
size += 8;
info->data = (char *) vmalloc (size);
if (size && info->data == NULL) {
printk (KERN_WARNING "No memory available for datan");
vfree (info);
rc = -ENOMEM;
} else {
devno_str = kmalloc (6 * sizeof (char), GFP_KERNEL);
memset (devno_str, 0, 6 * sizeof (char));
memcpy (devno_str,
file->f_dentry->d_parent->d_name.name,
strlen (file->f_dentry->d_parent->d_name.name) +
1);
devno = simple_strtoul (devno_str, &devno_str, 16);
irq = get_irq_by_devno (devno);
if (irq != -1) {
len +=
sprintf (info->data + len, "%sn",
ioinfo[irq]->ui.flags.
ready ? "yes" : "no");
}
info->len = len;
}
}
return rc;
}
static int
cio_chpid_entry_open (struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
tempinfo_t *info;
int irq;
int devno;
int i;
char *devno_str;
info = (tempinfo_t *) vmalloc (sizeof (tempinfo_t));
if (info == NULL) {
printk (KERN_WARNING "No memory available for datan");
rc = -ENOMEM;
} else {
file->private_data = (void *) info;
size += 8 * 16;
info->data = (char *) vmalloc (size);
if (size && info->data == NULL) {
printk (KERN_WARNING "No memory available for datan");
vfree (info);
rc = -ENOMEM;
} else {
devno_str = kmalloc (6 * sizeof (char), GFP_KERNEL);
memset (devno_str, 0, 6 * sizeof (char));
memcpy (devno_str,
file->f_dentry->d_parent->d_name.name,
strlen (file->f_dentry->d_parent->d_name.name) +
1);
devno = simple_strtoul (devno_str, &devno_str, 16);
irq = get_irq_by_devno (devno);
if (irq != -1) {
for (i = 0; i < 8; i++) {
len +=
sprintf (info->data + len,
"CHPID[%d]: ", i);
len +=
sprintf (info->data + len, "%02Xn",
ioinfo[irq]->schib.pmcw.
chpid[i]);
}
}
info->len = len;
}
}
return rc;
}
static struct file_operations cio_sensedata_entry_file_ops = {
read:cio_device_entry_read, open:cio_sensedata_entry_open,
release:cio_device_entry_close,
};
static struct file_operations cio_in_use_entry_file_ops = {
read:cio_device_entry_read, open:cio_in_use_entry_open,
release:cio_device_entry_close,
};
static struct file_operations cio_chpid_entry_file_ops = {
read:cio_device_entry_read, open:cio_chpid_entry_open,
release:cio_device_entry_close,
};
/*
* Function: cio_procfs_device_create
* create procfs entry for given device number
* and insert it into list
*/
int
cio_procfs_device_create (int devno)
{
cio_procfs_entry_t *entry;
cio_procfs_device_t *tmp;
cio_procfs_device_t *where;
char buf[8];
int i;
int rc = 0;
/* create the directory entry */
entry =
(cio_procfs_entry_t *) kmalloc (sizeof (cio_procfs_entry_t),
GFP_KERNEL);
if (entry) {
entry->devno = devno;
sprintf (buf, "%x", devno);
entry->cio_device_entry =
proc_mkdir (buf, cio_procfs_deviceinfo_root);
if (entry->cio_device_entry) {
tmp = (cio_procfs_device_t *)
kmalloc (sizeof (cio_procfs_device_t), GFP_KERNEL);
if (tmp) {
tmp->entry = entry;
if (cio_procfs_device_list == NULL) {
cio_procfs_device_list = tmp;
tmp->next = NULL;
} else {
where = cio_procfs_device_list;
i = where->entry->devno;
while ((devno > i)
&& (where->next != NULL)) {
where = where->next;
i = where->entry->devno;
}
if (where->next == NULL) {
where->next = tmp;
tmp->next = NULL;
} else {
tmp->next = where->next;
where->next = tmp;
}
}
/* create the different entries */
entry->cio_sensedata_entry =
create_proc_entry ("sensedata",
S_IFREG | S_IRUGO,
entry->cio_device_entry);
entry->cio_sensedata_entry->proc_fops =
&cio_sensedata_entry_file_ops;
entry->cio_in_use_entry =
create_proc_entry ("in_use",
S_IFREG | S_IRUGO,
entry->cio_device_entry);
entry->cio_in_use_entry->proc_fops =
&cio_in_use_entry_file_ops;
entry->cio_chpid_entry =
create_proc_entry ("chpids",
S_IFREG | S_IRUGO,
entry->cio_device_entry);
entry->cio_chpid_entry->proc_fops =
&cio_chpid_entry_file_ops;
} else {
printk (KERN_WARNING
"Error, could not allocate procfs structure!n");
remove_proc_entry (buf,
cio_procfs_deviceinfo_root);
kfree (entry);
rc = -ENOMEM;
}
} else {
printk (KERN_WARNING
"Error, could not allocate procfs structure!n");
kfree (entry);
rc = -ENOMEM;
}
} else {
printk (KERN_WARNING
"Error, could not allocate procfs structure!n");
rc = -ENOMEM;
}
return rc;
}
/*
* Function: cio_procfs_device_remove
* remove procfs entry for given device number
*/
int
cio_procfs_device_remove (int devno)
{
int rc = 0;
cio_procfs_device_t *tmp;
cio_procfs_device_t *prev = NULL;
tmp = cio_procfs_device_list;
while (tmp) {
if (tmp->entry->devno == devno)
break;
prev = tmp;
tmp = tmp->next;
}
if (tmp) {
char buf[8];
remove_proc_entry ("sensedata", tmp->entry->cio_device_entry);
remove_proc_entry ("in_use", tmp->entry->cio_device_entry);
remove_proc_entry ("chpid", tmp->entry->cio_device_entry);
sprintf (buf, "%x", devno);
remove_proc_entry (buf, cio_procfs_deviceinfo_root);
if (tmp == cio_procfs_device_list) {
cio_procfs_device_list = tmp->next;
} else {
prev->next = tmp->next;
}
kfree (tmp->entry);
kfree (tmp);
} else {
rc = -ENODEV;
}
return rc;
}
/*
* Function: cio_procfs_purge
* purge /proc/deviceinfo of entries for gone devices
*/
int
cio_procfs_device_purge (void)
{
int i;
for (i = 0; i <= highest_subchannel; i++) {
if (ioinfo[i] != INVALID_STORAGE_AREA) {
if (!ioinfo[i]->ui.flags.oper)
cio_procfs_device_remove (ioinfo[i]->devno);
}
}
return 0;
}
/*
* Function: cio_procfs_create
* create /proc/deviceinfo/ and subdirs for the devices
*/
static int
cio_procfs_create (void)
{
int irq;
if (cio_proc_devinfo) {
cio_procfs_deviceinfo_root =
proc_mkdir ("deviceinfo", &proc_root);
if (highest_subchannel >= MAX_CIO_PROCFS_ENTRIES) {
printk (KERN_ALERT
"Warning: Not enough inodes for creating all "
"entries under /proc/deviceinfo/. "
"Not every device will get an entry.n");
}
for (irq = 0; irq <= highest_subchannel; irq++) {
if (irq >= MAX_CIO_PROCFS_ENTRIES)
break;
if (ioinfo[irq] != INVALID_STORAGE_AREA) {
if (ioinfo[irq]->ui.flags.oper)
if (cio_procfs_device_create
(ioinfo[irq]->devno) == -ENOMEM) {
printk (KERN_CRIT
"Out of memory while creating "
"entries in /proc/deviceinfo/, "
"not all devices might show upn");
break;
}
}
}
}
return 1;
}
__initcall (cio_procfs_create);
/*
* Entry /proc/cio_ignore to display blacklisted ranges of devices.
* un-ignore devices by piping to /proc/cio_ignore:
* free all frees all blacklisted devices, free <range>,<range>,...
* frees specified ranges of devnos
* add <range>,<range>,... will add a range of devices to blacklist -
* but only for devices not already known
*/
static struct proc_dir_entry *cio_ignore_proc_entry;
static int
cio_ignore_proc_open (struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
tempinfo_t *info;
long flags;
int i, j;
info = (tempinfo_t *) vmalloc (sizeof (tempinfo_t));
if (info == NULL) {
printk (KERN_WARNING "No memory available for datan");
rc = -ENOMEM;
} else {
file->private_data = (void *) info;
size += nr_ignored * 6;
info->data = (char *) vmalloc (size);
if (size && info->data == NULL) {
printk (KERN_WARNING "No memory available for datan");
vfree (info);
rc = -ENOMEM;
} else {
spin_lock_irqsave (&blacklist_lock, flags);
for (i = 0; i <= highest_ignored; i++)
if (test_bit (i, &bl_dev)) {
len +=
sprintf (info->data + len, "%04x ",
i);
for (j = i; (j <= highest_ignored)
&& (test_bit (j, &bl_dev)); j++) ;
j--;
if (i != j)
len +=
sprintf (info->data + len,
"- %04x", j);
len += sprintf (info->data + len, "n");
i = j;
}
spin_unlock_irqrestore (&blacklist_lock, flags);
info->len = len;
}
}
return rc;
}
static int
cio_ignore_proc_close (struct inode *inode, struct file *file)
{
int rc = 0;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (p_info) {
if (p_info->data)
vfree (p_info->data);
vfree (p_info);
}
return rc;
}
static ssize_t
cio_ignore_proc_read (struct file *file, char *user_buf, size_t user_len,
loff_t * offset)
{
loff_t len;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (*offset >= p_info->len) {
return 0;
} else {
len = MIN (user_len, (p_info->len - *offset));
if (copy_to_user (user_buf, &(p_info->data[*offset]), len))
return -EFAULT;
(*offset) += len;
return len;
}
}
static ssize_t
cio_ignore_proc_write (struct file *file, const char *user_buf,
size_t user_len, loff_t * offset)
{
char *buffer
if(user_len > 65536)
user_len = 65536;
buffer = vmalloc (user_len + 1);
if (buffer == NULL)
return -ENOMEM;
if (copy_from_user (buffer, user_buf, user_len)) {
vfree (buffer);
return -EFAULT;
}
buffer[user_len] = '';
#ifdef CONFIG_DEBUG_IO
printk (KERN_DEBUG "/proc/cio_ignore: '%s'n", buffer);
#endif /* CONFIG_DEBUG_IO */
if (cio_debug_initialized)
debug_sprintf_event (cio_debug_msg_id, 2,
"/proc/cio_ignore: '%s'n", buffer);
blacklist_parse_proc_parameters (buffer);
vfree (buffer);
return user_len;
}
static struct file_operations cio_ignore_proc_file_ops = {
read:cio_ignore_proc_read, open:cio_ignore_proc_open,
write:cio_ignore_proc_write, release:cio_ignore_proc_close,
};
static int
cio_ignore_proc_init (void)
{
cio_ignore_proc_entry =
create_proc_entry ("cio_ignore", S_IFREG | S_IRUGO | S_IWUSR,
&proc_root);
cio_ignore_proc_entry->proc_fops = &cio_ignore_proc_file_ops;
return 1;
}
__initcall (cio_ignore_proc_init);
/*
* Entry /proc/irq_count
* display how many irqs have occured per cpu...
*/
static struct proc_dir_entry *cio_irq_proc_entry;
static int
cio_irq_proc_open (struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
tempinfo_t *info;
int i;
info = (tempinfo_t *) vmalloc (sizeof (tempinfo_t));
if (info == NULL) {
printk (KERN_WARNING "No memory available for datan");
rc = -ENOMEM;
} else {
file->private_data = (void *) info;
size += NR_CPUS * 16;
info->data = (char *) vmalloc (size);
if (size && info->data == NULL) {
printk (KERN_WARNING "No memory available for datan");
vfree (info);
rc = -ENOMEM;
} else {
for (i = 0; i < NR_CPUS; i++) {
if (s390_irq_count[i] != 0)
len +=
sprintf (info->data + len, "%lxn",
s390_irq_count[i]);
}
info->len = len;
}
}
return rc;
}
static int
cio_irq_proc_close (struct inode *inode, struct file *file)
{
int rc = 0;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (p_info) {
if (p_info->data)
vfree (p_info->data);
vfree (p_info);
}
return rc;
}
static ssize_t
cio_irq_proc_read (struct file *file, char *user_buf, size_t user_len,
loff_t * offset)
{
loff_t len;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (*offset >= p_info->len) {
return 0;
} else {
len = MIN (user_len, (p_info->len - *offset));
if (copy_to_user (user_buf, &(p_info->data[*offset]), len))
return -EFAULT;
(*offset) += len;
return len;
}
}
static struct file_operations cio_irq_proc_file_ops = {
read:cio_irq_proc_read, open:cio_irq_proc_open,
release:cio_irq_proc_close,
};
static int
cio_irq_proc_init (void)
{
int i;
if (cio_count_irqs) {
for (i = 0; i < NR_CPUS; i++)
s390_irq_count[i] = 0;
cio_irq_proc_entry =
create_proc_entry ("irq_count", S_IFREG | S_IRUGO,
&proc_root);
cio_irq_proc_entry->proc_fops = &cio_irq_proc_file_ops;
}
return 1;
}
__initcall (cio_irq_proc_init);
#ifdef CONFIG_CHSC
/*
* /proc/chpids to display available chpids
* vary chpids on/off by piping to it
*/
static struct proc_dir_entry *cio_chpids_proc_entry;
static int
cio_chpids_proc_open(struct inode *inode, struct file *file)
{
int rc = 0;
int size = 1;
int len = 0;
tempinfo_t *info;
int i;
if (!cio_chsc_desc_avail) {
/*
* We have not yet retrieved the link addresses,
* so we do it now.
*/
chsc_get_sch_descriptions();
}
info = (tempinfo_t *) vmalloc(sizeof(tempinfo_t));
if (info == NULL) {
printk( KERN_WARNING "No memory available for datan");
rc = -ENOMEM;
} else {
file->private_data = (void *) info;
size += NR_CHPIDS * 16;
info->data = (char *) vmalloc(size);
if ( size && info->data == NULL) {
printk( KERN_WARNING "No memory available for datan");
vfree (info);
rc = -ENOMEM;
} else {
/* update our stuff */
chsc_get_sch_descriptions();
if (!cio_chsc_desc_avail) {
len += sprintf(info->data+len, "no info availablen");
} else {
for (i=0;i<NR_CHPIDS;i++) {
if ((test_bit(i, &chpids)) &&
test_bit(i, &chpids_logical))
len += sprintf(info->data+len,
"%02X onlinen",
i);
else if (test_bit(i, &chpids_known))
len += sprintf(info->data+len,
"%02X logically offlinen",
i);
}
}
info->len = len;
}
}
return rc;
}
static int
cio_chpids_proc_close(struct inode *inode, struct file *file)
{
int rc = 0;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if (p_info) {
if (p_info->data)
vfree( p_info->data );
vfree( p_info );
}
return rc;
}
static ssize_t
cio_chpids_proc_read( struct file *file, char *user_buf, size_t user_len, loff_t * offset)
{
loff_t len;
tempinfo_t *p_info = (tempinfo_t *) file->private_data;
if ( *offset>=p_info->len) {
return 0;
} else {
len = MIN(user_len, (p_info->len - *offset));
if (copy_to_user( user_buf, &(p_info->data[*offset]), len))
return -EFAULT;
(* offset) += len;
return len;
}
}
static ssize_t
cio_chpids_proc_write (struct file *file, const char *user_buf,
size_t user_len, loff_t * offset)
{
char *buffer;
if(user_len > 65536)
user_len = 65536;
buffer = vmalloc (user_len + 1);
if (buffer == NULL)
return -ENOMEM;
if (copy_from_user (buffer, user_buf, user_len)) {
vfree (buffer);
return -EFAULT;
}
buffer[user_len]='';
#ifdef CIO_DEBUG_IO
printk("/proc/chpids: '%s'n", buffer);
#endif /* CIO_DEBUG_IO */
CIO_MSG_EVENT( 2, "/proc/chpids: '%s'n", buffer);
cio_parse_chpids_proc_parameters(buffer);
vfree (buffer);
return user_len;
}
static struct file_operations cio_chpids_proc_file_ops =
{
read:cio_chpids_proc_read,
open:cio_chpids_proc_open,
write:cio_chpids_proc_write,
release:cio_chpids_proc_close,
};
static int
cio_chpids_proc_init(void)
{
cio_chpids_proc_entry = create_proc_entry("chpids", S_IFREG|S_IRUGO|S_IWUSR, &proc_root);
cio_chpids_proc_entry->proc_fops = &cio_chpids_proc_file_ops;
return 1;
}
__initcall(cio_chpids_proc_init);
#endif
/* end of procfs stuff */
#endif
schib_t *
s390_get_schib (int irq)
{
if ((irq > highest_subchannel) || (irq < 0))
return NULL;
if (ioinfo[irq] == INVALID_STORAGE_AREA)
return NULL;
if (ioinfo[irq]->st)
return NULL;
return &ioinfo[irq]->schib;
}
int
s390_set_private_data(int irq, void *data)
{
SANITY_CHECK(irq);
ioinfo[irq]->private_data = data;
return 0;
}
void *
s390_get_private_data(int irq)
{
if ((irq > highest_subchannel) || (irq < 0))
return NULL;
if (ioinfo[irq] == INVALID_STORAGE_AREA)
return NULL;
if (ioinfo[irq]->st)
return NULL;
return ioinfo[irq]->private_data;
}
EXPORT_SYMBOL (halt_IO);
EXPORT_SYMBOL (clear_IO);
EXPORT_SYMBOL (do_IO);
EXPORT_SYMBOL (resume_IO);
EXPORT_SYMBOL (ioinfo);
EXPORT_SYMBOL (get_dev_info_by_irq);
EXPORT_SYMBOL (get_dev_info_by_devno);
EXPORT_SYMBOL (get_irq_by_devno);
EXPORT_SYMBOL (get_devno_by_irq);
EXPORT_SYMBOL (get_irq_first);
EXPORT_SYMBOL (get_irq_next);
EXPORT_SYMBOL (read_conf_data);
EXPORT_SYMBOL (read_dev_chars);
EXPORT_SYMBOL (s390_request_irq_special);
EXPORT_SYMBOL (s390_get_schib);
EXPORT_SYMBOL (s390_register_adapter_interrupt);
EXPORT_SYMBOL (s390_unregister_adapter_interrupt);
EXPORT_SYMBOL (s390_set_private_data);
EXPORT_SYMBOL (s390_get_private_data);
EXPORT_SYMBOL (s390_trigger_resense);