452 lines
13 KiB
C
452 lines
13 KiB
C
/*
|
|
* Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved.
|
|
* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
#include "qib.h"
|
|
|
|
/*
|
|
* Functions specific to the serial EEPROM on cards handled by ib_qib.
|
|
* The actual serail interface code is in qib_twsi.c. This file is a client
|
|
*/
|
|
|
|
/**
|
|
* qib_eeprom_read - receives bytes from the eeprom via I2C
|
|
* @dd: the qlogic_ib device
|
|
* @eeprom_offset: address to read from
|
|
* @buffer: where to store result
|
|
* @len: number of bytes to receive
|
|
*/
|
|
int qib_eeprom_read(struct qib_devdata *dd, u8 eeprom_offset,
|
|
void *buff, int len)
|
|
{
|
|
int ret;
|
|
|
|
ret = mutex_lock_interruptible(&dd->eep_lock);
|
|
if (!ret) {
|
|
ret = qib_twsi_reset(dd);
|
|
if (ret)
|
|
qib_dev_err(dd, "EEPROM Reset for read failed\n");
|
|
else
|
|
ret = qib_twsi_blk_rd(dd, dd->twsi_eeprom_dev,
|
|
eeprom_offset, buff, len);
|
|
mutex_unlock(&dd->eep_lock);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Actually update the eeprom, first doing write enable if
|
|
* needed, then restoring write enable state.
|
|
* Must be called with eep_lock held
|
|
*/
|
|
static int eeprom_write_with_enable(struct qib_devdata *dd, u8 offset,
|
|
const void *buf, int len)
|
|
{
|
|
int ret, pwen;
|
|
|
|
pwen = dd->f_eeprom_wen(dd, 1);
|
|
ret = qib_twsi_reset(dd);
|
|
if (ret)
|
|
qib_dev_err(dd, "EEPROM Reset for write failed\n");
|
|
else
|
|
ret = qib_twsi_blk_wr(dd, dd->twsi_eeprom_dev,
|
|
offset, buf, len);
|
|
dd->f_eeprom_wen(dd, pwen);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_eeprom_write - writes data to the eeprom via I2C
|
|
* @dd: the qlogic_ib device
|
|
* @eeprom_offset: where to place data
|
|
* @buffer: data to write
|
|
* @len: number of bytes to write
|
|
*/
|
|
int qib_eeprom_write(struct qib_devdata *dd, u8 eeprom_offset,
|
|
const void *buff, int len)
|
|
{
|
|
int ret;
|
|
|
|
ret = mutex_lock_interruptible(&dd->eep_lock);
|
|
if (!ret) {
|
|
ret = eeprom_write_with_enable(dd, eeprom_offset, buff, len);
|
|
mutex_unlock(&dd->eep_lock);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static u8 flash_csum(struct qib_flash *ifp, int adjust)
|
|
{
|
|
u8 *ip = (u8 *) ifp;
|
|
u8 csum = 0, len;
|
|
|
|
/*
|
|
* Limit length checksummed to max length of actual data.
|
|
* Checksum of erased eeprom will still be bad, but we avoid
|
|
* reading past the end of the buffer we were passed.
|
|
*/
|
|
len = ifp->if_length;
|
|
if (len > sizeof(struct qib_flash))
|
|
len = sizeof(struct qib_flash);
|
|
while (len--)
|
|
csum += *ip++;
|
|
csum -= ifp->if_csum;
|
|
csum = ~csum;
|
|
if (adjust)
|
|
ifp->if_csum = csum;
|
|
|
|
return csum;
|
|
}
|
|
|
|
/**
|
|
* qib_get_eeprom_info- get the GUID et al. from the TSWI EEPROM device
|
|
* @dd: the qlogic_ib device
|
|
*
|
|
* We have the capability to use the nguid field, and get
|
|
* the guid from the first chip's flash, to use for all of them.
|
|
*/
|
|
void qib_get_eeprom_info(struct qib_devdata *dd)
|
|
{
|
|
void *buf;
|
|
struct qib_flash *ifp;
|
|
__be64 guid;
|
|
int len, eep_stat;
|
|
u8 csum, *bguid;
|
|
int t = dd->unit;
|
|
struct qib_devdata *dd0 = qib_lookup(0);
|
|
|
|
if (t && dd0->nguid > 1 && t <= dd0->nguid) {
|
|
u8 oguid;
|
|
dd->base_guid = dd0->base_guid;
|
|
bguid = (u8 *) &dd->base_guid;
|
|
|
|
oguid = bguid[7];
|
|
bguid[7] += t;
|
|
if (oguid > bguid[7]) {
|
|
if (bguid[6] == 0xff) {
|
|
if (bguid[5] == 0xff) {
|
|
qib_dev_err(dd, "Can't set %s GUID"
|
|
" from base, wraps to"
|
|
" OUI!\n",
|
|
qib_get_unit_name(t));
|
|
dd->base_guid = 0;
|
|
goto bail;
|
|
}
|
|
bguid[5]++;
|
|
}
|
|
bguid[6]++;
|
|
}
|
|
dd->nguid = 1;
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Read full flash, not just currently used part, since it may have
|
|
* been written with a newer definition.
|
|
* */
|
|
len = sizeof(struct qib_flash);
|
|
buf = vmalloc(len);
|
|
if (!buf) {
|
|
qib_dev_err(dd, "Couldn't allocate memory to read %u "
|
|
"bytes from eeprom for GUID\n", len);
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Use "public" eeprom read function, which does locking and
|
|
* figures out device. This will migrate to chip-specific.
|
|
*/
|
|
eep_stat = qib_eeprom_read(dd, 0, buf, len);
|
|
|
|
if (eep_stat) {
|
|
qib_dev_err(dd, "Failed reading GUID from eeprom\n");
|
|
goto done;
|
|
}
|
|
ifp = (struct qib_flash *)buf;
|
|
|
|
csum = flash_csum(ifp, 0);
|
|
if (csum != ifp->if_csum) {
|
|
qib_devinfo(dd->pcidev, "Bad I2C flash checksum: "
|
|
"0x%x, not 0x%x\n", csum, ifp->if_csum);
|
|
goto done;
|
|
}
|
|
if (*(__be64 *) ifp->if_guid == cpu_to_be64(0) ||
|
|
*(__be64 *) ifp->if_guid == ~cpu_to_be64(0)) {
|
|
qib_dev_err(dd, "Invalid GUID %llx from flash; ignoring\n",
|
|
*(unsigned long long *) ifp->if_guid);
|
|
/* don't allow GUID if all 0 or all 1's */
|
|
goto done;
|
|
}
|
|
|
|
/* complain, but allow it */
|
|
if (*(u64 *) ifp->if_guid == 0x100007511000000ULL)
|
|
qib_devinfo(dd->pcidev, "Warning, GUID %llx is "
|
|
"default, probably not correct!\n",
|
|
*(unsigned long long *) ifp->if_guid);
|
|
|
|
bguid = ifp->if_guid;
|
|
if (!bguid[0] && !bguid[1] && !bguid[2]) {
|
|
/*
|
|
* Original incorrect GUID format in flash; fix in
|
|
* core copy, by shifting up 2 octets; don't need to
|
|
* change top octet, since both it and shifted are 0.
|
|
*/
|
|
bguid[1] = bguid[3];
|
|
bguid[2] = bguid[4];
|
|
bguid[3] = 0;
|
|
bguid[4] = 0;
|
|
guid = *(__be64 *) ifp->if_guid;
|
|
} else
|
|
guid = *(__be64 *) ifp->if_guid;
|
|
dd->base_guid = guid;
|
|
dd->nguid = ifp->if_numguid;
|
|
/*
|
|
* Things are slightly complicated by the desire to transparently
|
|
* support both the Pathscale 10-digit serial number and the QLogic
|
|
* 13-character version.
|
|
*/
|
|
if ((ifp->if_fversion > 1) && ifp->if_sprefix[0] &&
|
|
((u8 *) ifp->if_sprefix)[0] != 0xFF) {
|
|
char *snp = dd->serial;
|
|
|
|
/*
|
|
* This board has a Serial-prefix, which is stored
|
|
* elsewhere for backward-compatibility.
|
|
*/
|
|
memcpy(snp, ifp->if_sprefix, sizeof ifp->if_sprefix);
|
|
snp[sizeof ifp->if_sprefix] = '\0';
|
|
len = strlen(snp);
|
|
snp += len;
|
|
len = (sizeof dd->serial) - len;
|
|
if (len > sizeof ifp->if_serial)
|
|
len = sizeof ifp->if_serial;
|
|
memcpy(snp, ifp->if_serial, len);
|
|
} else
|
|
memcpy(dd->serial, ifp->if_serial,
|
|
sizeof ifp->if_serial);
|
|
if (!strstr(ifp->if_comment, "Tested successfully"))
|
|
qib_dev_err(dd, "Board SN %s did not pass functional "
|
|
"test: %s\n", dd->serial, ifp->if_comment);
|
|
|
|
memcpy(&dd->eep_st_errs, &ifp->if_errcntp, QIB_EEP_LOG_CNT);
|
|
/*
|
|
* Power-on (actually "active") hours are kept as little-endian value
|
|
* in EEPROM, but as seconds in a (possibly as small as 24-bit)
|
|
* atomic_t while running.
|
|
*/
|
|
atomic_set(&dd->active_time, 0);
|
|
dd->eep_hrs = ifp->if_powerhour[0] | (ifp->if_powerhour[1] << 8);
|
|
|
|
done:
|
|
vfree(buf);
|
|
|
|
bail:;
|
|
}
|
|
|
|
/**
|
|
* qib_update_eeprom_log - copy active-time and error counters to eeprom
|
|
* @dd: the qlogic_ib device
|
|
*
|
|
* Although the time is kept as seconds in the qib_devdata struct, it is
|
|
* rounded to hours for re-write, as we have only 16 bits in EEPROM.
|
|
* First-cut code reads whole (expected) struct qib_flash, modifies,
|
|
* re-writes. Future direction: read/write only what we need, assuming
|
|
* that the EEPROM had to have been "good enough" for driver init, and
|
|
* if not, we aren't making it worse.
|
|
*
|
|
*/
|
|
int qib_update_eeprom_log(struct qib_devdata *dd)
|
|
{
|
|
void *buf;
|
|
struct qib_flash *ifp;
|
|
int len, hi_water;
|
|
uint32_t new_time, new_hrs;
|
|
u8 csum;
|
|
int ret, idx;
|
|
unsigned long flags;
|
|
|
|
/* first, check if we actually need to do anything. */
|
|
ret = 0;
|
|
for (idx = 0; idx < QIB_EEP_LOG_CNT; ++idx) {
|
|
if (dd->eep_st_new_errs[idx]) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
new_time = atomic_read(&dd->active_time);
|
|
|
|
if (ret == 0 && new_time < 3600)
|
|
goto bail;
|
|
|
|
/*
|
|
* The quick-check above determined that there is something worthy
|
|
* of logging, so get current contents and do a more detailed idea.
|
|
* read full flash, not just currently used part, since it may have
|
|
* been written with a newer definition
|
|
*/
|
|
len = sizeof(struct qib_flash);
|
|
buf = vmalloc(len);
|
|
ret = 1;
|
|
if (!buf) {
|
|
qib_dev_err(dd, "Couldn't allocate memory to read %u "
|
|
"bytes from eeprom for logging\n", len);
|
|
goto bail;
|
|
}
|
|
|
|
/* Grab semaphore and read current EEPROM. If we get an
|
|
* error, let go, but if not, keep it until we finish write.
|
|
*/
|
|
ret = mutex_lock_interruptible(&dd->eep_lock);
|
|
if (ret) {
|
|
qib_dev_err(dd, "Unable to acquire EEPROM for logging\n");
|
|
goto free_bail;
|
|
}
|
|
ret = qib_twsi_blk_rd(dd, dd->twsi_eeprom_dev, 0, buf, len);
|
|
if (ret) {
|
|
mutex_unlock(&dd->eep_lock);
|
|
qib_dev_err(dd, "Unable read EEPROM for logging\n");
|
|
goto free_bail;
|
|
}
|
|
ifp = (struct qib_flash *)buf;
|
|
|
|
csum = flash_csum(ifp, 0);
|
|
if (csum != ifp->if_csum) {
|
|
mutex_unlock(&dd->eep_lock);
|
|
qib_dev_err(dd, "EEPROM cks err (0x%02X, S/B 0x%02X)\n",
|
|
csum, ifp->if_csum);
|
|
ret = 1;
|
|
goto free_bail;
|
|
}
|
|
hi_water = 0;
|
|
spin_lock_irqsave(&dd->eep_st_lock, flags);
|
|
for (idx = 0; idx < QIB_EEP_LOG_CNT; ++idx) {
|
|
int new_val = dd->eep_st_new_errs[idx];
|
|
if (new_val) {
|
|
/*
|
|
* If we have seen any errors, add to EEPROM values
|
|
* We need to saturate at 0xFF (255) and we also
|
|
* would need to adjust the checksum if we were
|
|
* trying to minimize EEPROM traffic
|
|
* Note that we add to actual current count in EEPROM,
|
|
* in case it was altered while we were running.
|
|
*/
|
|
new_val += ifp->if_errcntp[idx];
|
|
if (new_val > 0xFF)
|
|
new_val = 0xFF;
|
|
if (ifp->if_errcntp[idx] != new_val) {
|
|
ifp->if_errcntp[idx] = new_val;
|
|
hi_water = offsetof(struct qib_flash,
|
|
if_errcntp) + idx;
|
|
}
|
|
/*
|
|
* update our shadow (used to minimize EEPROM
|
|
* traffic), to match what we are about to write.
|
|
*/
|
|
dd->eep_st_errs[idx] = new_val;
|
|
dd->eep_st_new_errs[idx] = 0;
|
|
}
|
|
}
|
|
/*
|
|
* Now update active-time. We would like to round to the nearest hour
|
|
* but unless atomic_t are sure to be proper signed ints we cannot,
|
|
* because we need to account for what we "transfer" to EEPROM and
|
|
* if we log an hour at 31 minutes, then we would need to set
|
|
* active_time to -29 to accurately count the _next_ hour.
|
|
*/
|
|
if (new_time >= 3600) {
|
|
new_hrs = new_time / 3600;
|
|
atomic_sub((new_hrs * 3600), &dd->active_time);
|
|
new_hrs += dd->eep_hrs;
|
|
if (new_hrs > 0xFFFF)
|
|
new_hrs = 0xFFFF;
|
|
dd->eep_hrs = new_hrs;
|
|
if ((new_hrs & 0xFF) != ifp->if_powerhour[0]) {
|
|
ifp->if_powerhour[0] = new_hrs & 0xFF;
|
|
hi_water = offsetof(struct qib_flash, if_powerhour);
|
|
}
|
|
if ((new_hrs >> 8) != ifp->if_powerhour[1]) {
|
|
ifp->if_powerhour[1] = new_hrs >> 8;
|
|
hi_water = offsetof(struct qib_flash, if_powerhour) + 1;
|
|
}
|
|
}
|
|
/*
|
|
* There is a tiny possibility that we could somehow fail to write
|
|
* the EEPROM after updating our shadows, but problems from holding
|
|
* the spinlock too long are a much bigger issue.
|
|
*/
|
|
spin_unlock_irqrestore(&dd->eep_st_lock, flags);
|
|
if (hi_water) {
|
|
/* we made some change to the data, uopdate cksum and write */
|
|
csum = flash_csum(ifp, 1);
|
|
ret = eeprom_write_with_enable(dd, 0, buf, hi_water + 1);
|
|
}
|
|
mutex_unlock(&dd->eep_lock);
|
|
if (ret)
|
|
qib_dev_err(dd, "Failed updating EEPROM\n");
|
|
|
|
free_bail:
|
|
vfree(buf);
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_inc_eeprom_err - increment one of the four error counters
|
|
* that are logged to EEPROM.
|
|
* @dd: the qlogic_ib device
|
|
* @eidx: 0..3, the counter to increment
|
|
* @incr: how much to add
|
|
*
|
|
* Each counter is 8-bits, and saturates at 255 (0xFF). They
|
|
* are copied to the EEPROM (aka flash) whenever qib_update_eeprom_log()
|
|
* is called, but it can only be called in a context that allows sleep.
|
|
* This function can be called even at interrupt level.
|
|
*/
|
|
void qib_inc_eeprom_err(struct qib_devdata *dd, u32 eidx, u32 incr)
|
|
{
|
|
uint new_val;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dd->eep_st_lock, flags);
|
|
new_val = dd->eep_st_new_errs[eidx] + incr;
|
|
if (new_val > 255)
|
|
new_val = 255;
|
|
dd->eep_st_new_errs[eidx] = new_val;
|
|
spin_unlock_irqrestore(&dd->eep_st_lock, flags);
|
|
}
|