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linuxdebug/drivers/scsi/qla4xxx/ql4_83xx.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* QLogic iSCSI HBA Driver
* Copyright (c) 2003-2013 QLogic Corporation
*/
#include <linux/ratelimit.h>
#include "ql4_def.h"
#include "ql4_version.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"
uint32_t qla4_83xx_rd_reg(struct scsi_qla_host *ha, ulong addr)
{
return readl((void __iomem *)(ha->nx_pcibase + addr));
}
void qla4_83xx_wr_reg(struct scsi_qla_host *ha, ulong addr, uint32_t val)
{
writel(val, (void __iomem *)(ha->nx_pcibase + addr));
}
static int qla4_83xx_set_win_base(struct scsi_qla_host *ha, uint32_t addr)
{
uint32_t val;
int ret_val = QLA_SUCCESS;
qla4_83xx_wr_reg(ha, QLA83XX_CRB_WIN_FUNC(ha->func_num), addr);
val = qla4_83xx_rd_reg(ha, QLA83XX_CRB_WIN_FUNC(ha->func_num));
if (val != addr) {
ql4_printk(KERN_ERR, ha, "%s: Failed to set register window : addr written 0x%x, read 0x%x!\n",
__func__, addr, val);
ret_val = QLA_ERROR;
}
return ret_val;
}
int qla4_83xx_rd_reg_indirect(struct scsi_qla_host *ha, uint32_t addr,
uint32_t *data)
{
int ret_val;
ret_val = qla4_83xx_set_win_base(ha, addr);
if (ret_val == QLA_SUCCESS) {
*data = qla4_83xx_rd_reg(ha, QLA83XX_WILDCARD);
} else {
*data = 0xffffffff;
ql4_printk(KERN_ERR, ha, "%s: failed read of addr 0x%x!\n",
__func__, addr);
}
return ret_val;
}
int qla4_83xx_wr_reg_indirect(struct scsi_qla_host *ha, uint32_t addr,
uint32_t data)
{
int ret_val;
ret_val = qla4_83xx_set_win_base(ha, addr);
if (ret_val == QLA_SUCCESS)
qla4_83xx_wr_reg(ha, QLA83XX_WILDCARD, data);
else
ql4_printk(KERN_ERR, ha, "%s: failed wrt to addr 0x%x, data 0x%x\n",
__func__, addr, data);
return ret_val;
}
static int qla4_83xx_flash_lock(struct scsi_qla_host *ha)
{
int lock_owner;
int timeout = 0;
uint32_t lock_status = 0;
int ret_val = QLA_SUCCESS;
while (lock_status == 0) {
lock_status = qla4_83xx_rd_reg(ha, QLA83XX_FLASH_LOCK);
if (lock_status)
break;
if (++timeout >= QLA83XX_FLASH_LOCK_TIMEOUT / 20) {
lock_owner = qla4_83xx_rd_reg(ha,
QLA83XX_FLASH_LOCK_ID);
ql4_printk(KERN_ERR, ha, "%s: flash lock by func %d failed, held by func %d\n",
__func__, ha->func_num, lock_owner);
ret_val = QLA_ERROR;
break;
}
msleep(20);
}
qla4_83xx_wr_reg(ha, QLA83XX_FLASH_LOCK_ID, ha->func_num);
return ret_val;
}
static void qla4_83xx_flash_unlock(struct scsi_qla_host *ha)
{
/* Reading FLASH_UNLOCK register unlocks the Flash */
qla4_83xx_wr_reg(ha, QLA83XX_FLASH_LOCK_ID, 0xFF);
qla4_83xx_rd_reg(ha, QLA83XX_FLASH_UNLOCK);
}
int qla4_83xx_flash_read_u32(struct scsi_qla_host *ha, uint32_t flash_addr,
uint8_t *p_data, int u32_word_count)
{
int i;
uint32_t u32_word;
uint32_t addr = flash_addr;
int ret_val = QLA_SUCCESS;
ret_val = qla4_83xx_flash_lock(ha);
if (ret_val == QLA_ERROR)
goto exit_lock_error;
if (addr & 0x03) {
ql4_printk(KERN_ERR, ha, "%s: Illegal addr = 0x%x\n",
__func__, addr);
ret_val = QLA_ERROR;
goto exit_flash_read;
}
for (i = 0; i < u32_word_count; i++) {
ret_val = qla4_83xx_wr_reg_indirect(ha,
QLA83XX_FLASH_DIRECT_WINDOW,
(addr & 0xFFFF0000));
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: failed to write addr 0x%x to FLASH_DIRECT_WINDOW\n!",
__func__, addr);
goto exit_flash_read;
}
ret_val = qla4_83xx_rd_reg_indirect(ha,
QLA83XX_FLASH_DIRECT_DATA(addr),
&u32_word);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: failed to read addr 0x%x!\n",
__func__, addr);
goto exit_flash_read;
}
*(__le32 *)p_data = le32_to_cpu(u32_word);
p_data = p_data + 4;
addr = addr + 4;
}
exit_flash_read:
qla4_83xx_flash_unlock(ha);
exit_lock_error:
return ret_val;
}
int qla4_83xx_lockless_flash_read_u32(struct scsi_qla_host *ha,
uint32_t flash_addr, uint8_t *p_data,
int u32_word_count)
{
uint32_t i;
uint32_t u32_word;
uint32_t flash_offset;
uint32_t addr = flash_addr;
int ret_val = QLA_SUCCESS;
flash_offset = addr & (QLA83XX_FLASH_SECTOR_SIZE - 1);
if (addr & 0x3) {
ql4_printk(KERN_ERR, ha, "%s: Illegal addr = 0x%x\n",
__func__, addr);
ret_val = QLA_ERROR;
goto exit_lockless_read;
}
ret_val = qla4_83xx_wr_reg_indirect(ha, QLA83XX_FLASH_DIRECT_WINDOW,
addr);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: failed to write addr 0x%x to FLASH_DIRECT_WINDOW!\n",
__func__, addr);
goto exit_lockless_read;
}
/* Check if data is spread across multiple sectors */
if ((flash_offset + (u32_word_count * sizeof(uint32_t))) >
(QLA83XX_FLASH_SECTOR_SIZE - 1)) {
/* Multi sector read */
for (i = 0; i < u32_word_count; i++) {
ret_val = qla4_83xx_rd_reg_indirect(ha,
QLA83XX_FLASH_DIRECT_DATA(addr),
&u32_word);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: failed to read addr 0x%x!\n",
__func__, addr);
goto exit_lockless_read;
}
*(__le32 *)p_data = le32_to_cpu(u32_word);
p_data = p_data + 4;
addr = addr + 4;
flash_offset = flash_offset + 4;
if (flash_offset > (QLA83XX_FLASH_SECTOR_SIZE - 1)) {
/* This write is needed once for each sector */
ret_val = qla4_83xx_wr_reg_indirect(ha,
QLA83XX_FLASH_DIRECT_WINDOW,
addr);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: failed to write addr 0x%x to FLASH_DIRECT_WINDOW!\n",
__func__, addr);
goto exit_lockless_read;
}
flash_offset = 0;
}
}
} else {
/* Single sector read */
for (i = 0; i < u32_word_count; i++) {
ret_val = qla4_83xx_rd_reg_indirect(ha,
QLA83XX_FLASH_DIRECT_DATA(addr),
&u32_word);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: failed to read addr 0x%x!\n",
__func__, addr);
goto exit_lockless_read;
}
*(__le32 *)p_data = le32_to_cpu(u32_word);
p_data = p_data + 4;
addr = addr + 4;
}
}
exit_lockless_read:
return ret_val;
}
void qla4_83xx_rom_lock_recovery(struct scsi_qla_host *ha)
{
if (qla4_83xx_flash_lock(ha))
ql4_printk(KERN_INFO, ha, "%s: Resetting rom lock\n", __func__);
/*
* We got the lock, or someone else is holding the lock
* since we are restting, forcefully unlock
*/
qla4_83xx_flash_unlock(ha);
}
#define INTENT_TO_RECOVER 0x01
#define PROCEED_TO_RECOVER 0x02
static int qla4_83xx_lock_recovery(struct scsi_qla_host *ha)
{
uint32_t lock = 0, lockid;
int ret_val = QLA_ERROR;
lockid = ha->isp_ops->rd_reg_direct(ha, QLA83XX_DRV_LOCKRECOVERY);
/* Check for other Recovery in progress, go wait */
if ((lockid & 0x3) != 0)
goto exit_lock_recovery;
/* Intent to Recover */
ha->isp_ops->wr_reg_direct(ha, QLA83XX_DRV_LOCKRECOVERY,
(ha->func_num << 2) | INTENT_TO_RECOVER);
msleep(200);
/* Check Intent to Recover is advertised */
lockid = ha->isp_ops->rd_reg_direct(ha, QLA83XX_DRV_LOCKRECOVERY);
if ((lockid & 0x3C) != (ha->func_num << 2))
goto exit_lock_recovery;
ql4_printk(KERN_INFO, ha, "%s: IDC Lock recovery initiated for func %d\n",
__func__, ha->func_num);
/* Proceed to Recover */
ha->isp_ops->wr_reg_direct(ha, QLA83XX_DRV_LOCKRECOVERY,
(ha->func_num << 2) | PROCEED_TO_RECOVER);
/* Force Unlock */
ha->isp_ops->wr_reg_direct(ha, QLA83XX_DRV_LOCK_ID, 0xFF);
ha->isp_ops->rd_reg_direct(ha, QLA83XX_DRV_UNLOCK);
/* Clear bits 0-5 in IDC_RECOVERY register*/
ha->isp_ops->wr_reg_direct(ha, QLA83XX_DRV_LOCKRECOVERY, 0);
/* Get lock */
lock = ha->isp_ops->rd_reg_direct(ha, QLA83XX_DRV_LOCK);
if (lock) {
lockid = ha->isp_ops->rd_reg_direct(ha, QLA83XX_DRV_LOCK_ID);
lockid = ((lockid + (1 << 8)) & ~0xFF) | ha->func_num;
ha->isp_ops->wr_reg_direct(ha, QLA83XX_DRV_LOCK_ID, lockid);
ret_val = QLA_SUCCESS;
}
exit_lock_recovery:
return ret_val;
}
#define QLA83XX_DRV_LOCK_MSLEEP 200
int qla4_83xx_drv_lock(struct scsi_qla_host *ha)
{
int timeout = 0;
uint32_t status = 0;
int ret_val = QLA_SUCCESS;
uint32_t first_owner = 0;
uint32_t tmo_owner = 0;
uint32_t lock_id;
uint32_t func_num;
uint32_t lock_cnt;
while (status == 0) {
status = qla4_83xx_rd_reg(ha, QLA83XX_DRV_LOCK);
if (status) {
/* Increment Counter (8-31) and update func_num (0-7) on
* getting a successful lock */
lock_id = qla4_83xx_rd_reg(ha, QLA83XX_DRV_LOCK_ID);
lock_id = ((lock_id + (1 << 8)) & ~0xFF) | ha->func_num;
qla4_83xx_wr_reg(ha, QLA83XX_DRV_LOCK_ID, lock_id);
break;
}
if (timeout == 0)
/* Save counter + ID of function holding the lock for
* first failure */
first_owner = ha->isp_ops->rd_reg_direct(ha,
QLA83XX_DRV_LOCK_ID);
if (++timeout >=
(QLA83XX_DRV_LOCK_TIMEOUT / QLA83XX_DRV_LOCK_MSLEEP)) {
tmo_owner = qla4_83xx_rd_reg(ha, QLA83XX_DRV_LOCK_ID);
func_num = tmo_owner & 0xFF;
lock_cnt = tmo_owner >> 8;
ql4_printk(KERN_INFO, ha, "%s: Lock by func %d failed after 2s, lock held by func %d, lock count %d, first_owner %d\n",
__func__, ha->func_num, func_num, lock_cnt,
(first_owner & 0xFF));
if (first_owner != tmo_owner) {
/* Some other driver got lock, OR same driver
* got lock again (counter value changed), when
* we were waiting for lock.
* Retry for another 2 sec */
ql4_printk(KERN_INFO, ha, "%s: IDC lock failed for func %d\n",
__func__, ha->func_num);
timeout = 0;
} else {
/* Same driver holding lock > 2sec.
* Force Recovery */
ret_val = qla4_83xx_lock_recovery(ha);
if (ret_val == QLA_SUCCESS) {
/* Recovered and got lock */
ql4_printk(KERN_INFO, ha, "%s: IDC lock Recovery by %d successful\n",
__func__, ha->func_num);
break;
}
/* Recovery Failed, some other function
* has the lock, wait for 2secs and retry */
ql4_printk(KERN_INFO, ha, "%s: IDC lock Recovery by %d failed, Retrying timeout\n",
__func__, ha->func_num);
timeout = 0;
}
}
msleep(QLA83XX_DRV_LOCK_MSLEEP);
}
return ret_val;
}
void qla4_83xx_drv_unlock(struct scsi_qla_host *ha)
{
int id;
id = qla4_83xx_rd_reg(ha, QLA83XX_DRV_LOCK_ID);
if ((id & 0xFF) != ha->func_num) {
ql4_printk(KERN_ERR, ha, "%s: IDC Unlock by %d failed, lock owner is %d\n",
__func__, ha->func_num, (id & 0xFF));
return;
}
/* Keep lock counter value, update the ha->func_num to 0xFF */
qla4_83xx_wr_reg(ha, QLA83XX_DRV_LOCK_ID, (id | 0xFF));
qla4_83xx_rd_reg(ha, QLA83XX_DRV_UNLOCK);
}
void qla4_83xx_set_idc_dontreset(struct scsi_qla_host *ha)
{
uint32_t idc_ctrl;
idc_ctrl = qla4_83xx_rd_reg(ha, QLA83XX_IDC_DRV_CTRL);
idc_ctrl |= DONTRESET_BIT0;
qla4_83xx_wr_reg(ha, QLA83XX_IDC_DRV_CTRL, idc_ctrl);
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: idc_ctrl = %d\n", __func__,
idc_ctrl));
}
void qla4_83xx_clear_idc_dontreset(struct scsi_qla_host *ha)
{
uint32_t idc_ctrl;
idc_ctrl = qla4_83xx_rd_reg(ha, QLA83XX_IDC_DRV_CTRL);
idc_ctrl &= ~DONTRESET_BIT0;
qla4_83xx_wr_reg(ha, QLA83XX_IDC_DRV_CTRL, idc_ctrl);
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: idc_ctrl = %d\n", __func__,
idc_ctrl));
}
int qla4_83xx_idc_dontreset(struct scsi_qla_host *ha)
{
uint32_t idc_ctrl;
idc_ctrl = qla4_83xx_rd_reg(ha, QLA83XX_IDC_DRV_CTRL);
return idc_ctrl & DONTRESET_BIT0;
}
/*-------------------------IDC State Machine ---------------------*/
enum {
UNKNOWN_CLASS = 0,
NIC_CLASS,
FCOE_CLASS,
ISCSI_CLASS
};
struct device_info {
int func_num;
int device_type;
int port_num;
};
int qla4_83xx_can_perform_reset(struct scsi_qla_host *ha)
{
uint32_t drv_active;
uint32_t dev_part, dev_part1, dev_part2;
int i;
struct device_info device_map[16];
int func_nibble;
int nibble;
int nic_present = 0;
int iscsi_present = 0;
int iscsi_func_low = 0;
/* Use the dev_partition register to determine the PCI function number
* and then check drv_active register to see which driver is loaded */
dev_part1 = qla4_83xx_rd_reg(ha,
ha->reg_tbl[QLA8XXX_CRB_DEV_PART_INFO]);
dev_part2 = qla4_83xx_rd_reg(ha, QLA83XX_CRB_DEV_PART_INFO2);
drv_active = qla4_83xx_rd_reg(ha, ha->reg_tbl[QLA8XXX_CRB_DRV_ACTIVE]);
/* Each function has 4 bits in dev_partition Info register,
* Lower 2 bits - device type, Upper 2 bits - physical port number */
dev_part = dev_part1;
for (i = nibble = 0; i <= 15; i++, nibble++) {
func_nibble = dev_part & (0xF << (nibble * 4));
func_nibble >>= (nibble * 4);
device_map[i].func_num = i;
device_map[i].device_type = func_nibble & 0x3;
device_map[i].port_num = func_nibble & 0xC;
if (device_map[i].device_type == NIC_CLASS) {
if (drv_active & (1 << device_map[i].func_num)) {
nic_present++;
break;
}
} else if (device_map[i].device_type == ISCSI_CLASS) {
if (drv_active & (1 << device_map[i].func_num)) {
if (!iscsi_present ||
iscsi_func_low > device_map[i].func_num)
iscsi_func_low = device_map[i].func_num;
iscsi_present++;
}
}
/* For function_num[8..15] get info from dev_part2 register */
if (nibble == 7) {
nibble = 0;
dev_part = dev_part2;
}
}
/* NIC, iSCSI and FCOE are the Reset owners based on order, NIC gets
* precedence over iSCSI and FCOE and iSCSI over FCOE, based on drivers
* present. */
if (!nic_present && (ha->func_num == iscsi_func_low)) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: can reset - NIC not present and lower iSCSI function is %d\n",
__func__, ha->func_num));
return 1;
}
return 0;
}
/**
* qla4_83xx_need_reset_handler - Code to start reset sequence
* @ha: pointer to adapter structure
*
* Note: IDC lock must be held upon entry
**/
void qla4_83xx_need_reset_handler(struct scsi_qla_host *ha)
{
uint32_t dev_state, drv_state, drv_active;
unsigned long reset_timeout, dev_init_timeout;
ql4_printk(KERN_INFO, ha, "%s: Performing ISP error recovery\n",
__func__);
if (!test_bit(AF_8XXX_RST_OWNER, &ha->flags)) {
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: reset acknowledged\n",
__func__));
qla4_8xxx_set_rst_ready(ha);
/* Non-reset owners ACK Reset and wait for device INIT state
* as part of Reset Recovery by Reset Owner */
dev_init_timeout = jiffies + (ha->nx_dev_init_timeout * HZ);
do {
if (time_after_eq(jiffies, dev_init_timeout)) {
ql4_printk(KERN_INFO, ha, "%s: Non Reset owner dev init timeout\n",
__func__);
break;
}
ha->isp_ops->idc_unlock(ha);
msleep(1000);
ha->isp_ops->idc_lock(ha);
dev_state = qla4_8xxx_rd_direct(ha,
QLA8XXX_CRB_DEV_STATE);
} while (dev_state == QLA8XXX_DEV_NEED_RESET);
} else {
qla4_8xxx_set_rst_ready(ha);
reset_timeout = jiffies + (ha->nx_reset_timeout * HZ);
drv_state = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DRV_STATE);
drv_active = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DRV_ACTIVE);
ql4_printk(KERN_INFO, ha, "%s: drv_state = 0x%x, drv_active = 0x%x\n",
__func__, drv_state, drv_active);
while (drv_state != drv_active) {
if (time_after_eq(jiffies, reset_timeout)) {
ql4_printk(KERN_INFO, ha, "%s: %s: RESET TIMEOUT! drv_state: 0x%08x, drv_active: 0x%08x\n",
__func__, DRIVER_NAME, drv_state,
drv_active);
break;
}
ha->isp_ops->idc_unlock(ha);
msleep(1000);
ha->isp_ops->idc_lock(ha);
drv_state = qla4_8xxx_rd_direct(ha,
QLA8XXX_CRB_DRV_STATE);
drv_active = qla4_8xxx_rd_direct(ha,
QLA8XXX_CRB_DRV_ACTIVE);
}
if (drv_state != drv_active) {
ql4_printk(KERN_INFO, ha, "%s: Reset_owner turning off drv_active of non-acking function 0x%x\n",
__func__, (drv_active ^ drv_state));
drv_active = drv_active & drv_state;
qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DRV_ACTIVE,
drv_active);
}
clear_bit(AF_8XXX_RST_OWNER, &ha->flags);
/* Start Reset Recovery */
qla4_8xxx_device_bootstrap(ha);
}
}
void qla4_83xx_get_idc_param(struct scsi_qla_host *ha)
{
uint32_t idc_params, ret_val;
ret_val = qla4_83xx_flash_read_u32(ha, QLA83XX_IDC_PARAM_ADDR,
(uint8_t *)&idc_params, 1);
if (ret_val == QLA_SUCCESS) {
ha->nx_dev_init_timeout = idc_params & 0xFFFF;
ha->nx_reset_timeout = (idc_params >> 16) & 0xFFFF;
} else {
ha->nx_dev_init_timeout = ROM_DEV_INIT_TIMEOUT;
ha->nx_reset_timeout = ROM_DRV_RESET_ACK_TIMEOUT;
}
DEBUG2(ql4_printk(KERN_DEBUG, ha,
"%s: ha->nx_dev_init_timeout = %d, ha->nx_reset_timeout = %d\n",
__func__, ha->nx_dev_init_timeout,
ha->nx_reset_timeout));
}
/*-------------------------Reset Sequence Functions-----------------------*/
static void qla4_83xx_dump_reset_seq_hdr(struct scsi_qla_host *ha)
{
uint8_t *phdr;
if (!ha->reset_tmplt.buff) {
ql4_printk(KERN_ERR, ha, "%s: Error: Invalid reset_seq_template\n",
__func__);
return;
}
phdr = ha->reset_tmplt.buff;
DEBUG2(ql4_printk(KERN_INFO, ha,
"Reset Template: 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X\n",
*phdr, *(phdr+1), *(phdr+2), *(phdr+3), *(phdr+4),
*(phdr+5), *(phdr+6), *(phdr+7), *(phdr + 8),
*(phdr+9), *(phdr+10), *(phdr+11), *(phdr+12),
*(phdr+13), *(phdr+14), *(phdr+15)));
}
static int qla4_83xx_copy_bootloader(struct scsi_qla_host *ha)
{
uint8_t *p_cache;
uint32_t src, count, size;
uint64_t dest;
int ret_val = QLA_SUCCESS;
src = QLA83XX_BOOTLOADER_FLASH_ADDR;
dest = qla4_83xx_rd_reg(ha, QLA83XX_BOOTLOADER_ADDR);
size = qla4_83xx_rd_reg(ha, QLA83XX_BOOTLOADER_SIZE);
/* 128 bit alignment check */
if (size & 0xF)
size = (size + 16) & ~0xF;
/* 16 byte count */
count = size/16;
p_cache = vmalloc(size);
if (p_cache == NULL) {
ql4_printk(KERN_ERR, ha, "%s: Failed to allocate memory for boot loader cache\n",
__func__);
ret_val = QLA_ERROR;
goto exit_copy_bootloader;
}
ret_val = qla4_83xx_lockless_flash_read_u32(ha, src, p_cache,
size / sizeof(uint32_t));
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: Error reading firmware from flash\n",
__func__);
goto exit_copy_error;
}
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: Read firmware from flash\n",
__func__));
/* 128 bit/16 byte write to MS memory */
ret_val = qla4_8xxx_ms_mem_write_128b(ha, dest, (uint32_t *)p_cache,
count);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: Error writing firmware to MS\n",
__func__);
goto exit_copy_error;
}
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: Wrote firmware size %d to MS\n",
__func__, size));
exit_copy_error:
vfree(p_cache);
exit_copy_bootloader:
return ret_val;
}
static int qla4_83xx_check_cmd_peg_status(struct scsi_qla_host *ha)
{
uint32_t val, ret_val = QLA_ERROR;
int retries = CRB_CMDPEG_CHECK_RETRY_COUNT;
do {
val = qla4_83xx_rd_reg(ha, QLA83XX_CMDPEG_STATE);
if (val == PHAN_INITIALIZE_COMPLETE) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Command Peg initialization complete. State=0x%x\n",
__func__, val));
ret_val = QLA_SUCCESS;
break;
}
msleep(CRB_CMDPEG_CHECK_DELAY);
} while (--retries);
return ret_val;
}
/**
* qla4_83xx_poll_reg - Poll the given CRB addr for duration msecs till
* value read ANDed with test_mask is equal to test_result.
*
* @ha : Pointer to adapter structure
* @addr : CRB register address
* @duration : Poll for total of "duration" msecs
* @test_mask : Mask value read with "test_mask"
* @test_result : Compare (value&test_mask) with test_result.
**/
static int qla4_83xx_poll_reg(struct scsi_qla_host *ha, uint32_t addr,
int duration, uint32_t test_mask,
uint32_t test_result)
{
uint32_t value;
uint8_t retries;
int ret_val = QLA_SUCCESS;
ret_val = qla4_83xx_rd_reg_indirect(ha, addr, &value);
if (ret_val == QLA_ERROR)
goto exit_poll_reg;
retries = duration / 10;
do {
if ((value & test_mask) != test_result) {
msleep(duration / 10);
ret_val = qla4_83xx_rd_reg_indirect(ha, addr, &value);
if (ret_val == QLA_ERROR)
goto exit_poll_reg;
ret_val = QLA_ERROR;
} else {
ret_val = QLA_SUCCESS;
break;
}
} while (retries--);
exit_poll_reg:
if (ret_val == QLA_ERROR) {
ha->reset_tmplt.seq_error++;
ql4_printk(KERN_ERR, ha, "%s: Poll Failed: 0x%08x 0x%08x 0x%08x\n",
__func__, value, test_mask, test_result);
}
return ret_val;
}
static int qla4_83xx_reset_seq_checksum_test(struct scsi_qla_host *ha)
{
uint32_t sum = 0;
uint16_t *buff = (uint16_t *)ha->reset_tmplt.buff;
int u16_count = ha->reset_tmplt.hdr->size / sizeof(uint16_t);
int ret_val;
while (u16_count-- > 0)
sum += *buff++;
while (sum >> 16)
sum = (sum & 0xFFFF) + (sum >> 16);
/* checksum of 0 indicates a valid template */
if (~sum) {
ret_val = QLA_SUCCESS;
} else {
ql4_printk(KERN_ERR, ha, "%s: Reset seq checksum failed\n",
__func__);
ret_val = QLA_ERROR;
}
return ret_val;
}
/**
* qla4_83xx_read_reset_template - Read Reset Template from Flash
* @ha: Pointer to adapter structure
**/
void qla4_83xx_read_reset_template(struct scsi_qla_host *ha)
{
uint8_t *p_buff;
uint32_t addr, tmplt_hdr_def_size, tmplt_hdr_size;
uint32_t ret_val;
ha->reset_tmplt.seq_error = 0;
ha->reset_tmplt.buff = vmalloc(QLA83XX_RESTART_TEMPLATE_SIZE);
if (ha->reset_tmplt.buff == NULL) {
ql4_printk(KERN_ERR, ha, "%s: Failed to allocate reset template resources\n",
__func__);
goto exit_read_reset_template;
}
p_buff = ha->reset_tmplt.buff;
addr = QLA83XX_RESET_TEMPLATE_ADDR;
tmplt_hdr_def_size = sizeof(struct qla4_83xx_reset_template_hdr) /
sizeof(uint32_t);
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Read template hdr size %d from Flash\n",
__func__, tmplt_hdr_def_size));
/* Copy template header from flash */
ret_val = qla4_83xx_flash_read_u32(ha, addr, p_buff,
tmplt_hdr_def_size);
if (ret_val != QLA_SUCCESS) {
ql4_printk(KERN_ERR, ha, "%s: Failed to read reset template\n",
__func__);
goto exit_read_template_error;
}
ha->reset_tmplt.hdr =
(struct qla4_83xx_reset_template_hdr *)ha->reset_tmplt.buff;
/* Validate the template header size and signature */
tmplt_hdr_size = ha->reset_tmplt.hdr->hdr_size/sizeof(uint32_t);
if ((tmplt_hdr_size != tmplt_hdr_def_size) ||
(ha->reset_tmplt.hdr->signature != RESET_TMPLT_HDR_SIGNATURE)) {
ql4_printk(KERN_ERR, ha, "%s: Template Header size %d is invalid, tmplt_hdr_def_size %d\n",
__func__, tmplt_hdr_size, tmplt_hdr_def_size);
goto exit_read_template_error;
}
addr = QLA83XX_RESET_TEMPLATE_ADDR + ha->reset_tmplt.hdr->hdr_size;
p_buff = ha->reset_tmplt.buff + ha->reset_tmplt.hdr->hdr_size;
tmplt_hdr_def_size = (ha->reset_tmplt.hdr->size -
ha->reset_tmplt.hdr->hdr_size) / sizeof(uint32_t);
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Read rest of the template size %d\n",
__func__, ha->reset_tmplt.hdr->size));
/* Copy rest of the template */
ret_val = qla4_83xx_flash_read_u32(ha, addr, p_buff,
tmplt_hdr_def_size);
if (ret_val != QLA_SUCCESS) {
ql4_printk(KERN_ERR, ha, "%s: Failed to read reset template\n",
__func__);
goto exit_read_template_error;
}
/* Integrity check */
if (qla4_83xx_reset_seq_checksum_test(ha)) {
ql4_printk(KERN_ERR, ha, "%s: Reset Seq checksum failed!\n",
__func__);
goto exit_read_template_error;
}
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Reset Seq checksum passed, Get stop, start and init seq offsets\n",
__func__));
/* Get STOP, START, INIT sequence offsets */
ha->reset_tmplt.init_offset = ha->reset_tmplt.buff +
ha->reset_tmplt.hdr->init_seq_offset;
ha->reset_tmplt.start_offset = ha->reset_tmplt.buff +
ha->reset_tmplt.hdr->start_seq_offset;
ha->reset_tmplt.stop_offset = ha->reset_tmplt.buff +
ha->reset_tmplt.hdr->hdr_size;
qla4_83xx_dump_reset_seq_hdr(ha);
goto exit_read_reset_template;
exit_read_template_error:
vfree(ha->reset_tmplt.buff);
exit_read_reset_template:
return;
}
/**
* qla4_83xx_read_write_crb_reg - Read from raddr and write value to waddr.
*
* @ha : Pointer to adapter structure
* @raddr : CRB address to read from
* @waddr : CRB address to write to
**/
static void qla4_83xx_read_write_crb_reg(struct scsi_qla_host *ha,
uint32_t raddr, uint32_t waddr)
{
uint32_t value;
qla4_83xx_rd_reg_indirect(ha, raddr, &value);
qla4_83xx_wr_reg_indirect(ha, waddr, value);
}
/**
* qla4_83xx_rmw_crb_reg - Read Modify Write crb register
*
* This function read value from raddr, AND with test_mask,
* Shift Left,Right/OR/XOR with values RMW header and write value to waddr.
*
* @ha : Pointer to adapter structure
* @raddr : CRB address to read from
* @waddr : CRB address to write to
* @p_rmw_hdr : header with shift/or/xor values.
**/
static void qla4_83xx_rmw_crb_reg(struct scsi_qla_host *ha, uint32_t raddr,
uint32_t waddr,
struct qla4_83xx_rmw *p_rmw_hdr)
{
uint32_t value;
if (p_rmw_hdr->index_a)
value = ha->reset_tmplt.array[p_rmw_hdr->index_a];
else
qla4_83xx_rd_reg_indirect(ha, raddr, &value);
value &= p_rmw_hdr->test_mask;
value <<= p_rmw_hdr->shl;
value >>= p_rmw_hdr->shr;
value |= p_rmw_hdr->or_value;
value ^= p_rmw_hdr->xor_value;
qla4_83xx_wr_reg_indirect(ha, waddr, value);
return;
}
static void qla4_83xx_write_list(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
struct qla4_83xx_entry *p_entry;
uint32_t i;
p_entry = (struct qla4_83xx_entry *)
((char *)p_hdr + sizeof(struct qla4_83xx_reset_entry_hdr));
for (i = 0; i < p_hdr->count; i++, p_entry++) {
qla4_83xx_wr_reg_indirect(ha, p_entry->arg1, p_entry->arg2);
if (p_hdr->delay)
udelay((uint32_t)(p_hdr->delay));
}
}
static void qla4_83xx_read_write_list(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
struct qla4_83xx_entry *p_entry;
uint32_t i;
p_entry = (struct qla4_83xx_entry *)
((char *)p_hdr + sizeof(struct qla4_83xx_reset_entry_hdr));
for (i = 0; i < p_hdr->count; i++, p_entry++) {
qla4_83xx_read_write_crb_reg(ha, p_entry->arg1, p_entry->arg2);
if (p_hdr->delay)
udelay((uint32_t)(p_hdr->delay));
}
}
static void qla4_83xx_poll_list(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
long delay;
struct qla4_83xx_entry *p_entry;
struct qla4_83xx_poll *p_poll;
uint32_t i;
uint32_t value;
p_poll = (struct qla4_83xx_poll *)
((char *)p_hdr + sizeof(struct qla4_83xx_reset_entry_hdr));
/* Entries start after 8 byte qla4_83xx_poll, poll header contains
* the test_mask, test_value. */
p_entry = (struct qla4_83xx_entry *)((char *)p_poll +
sizeof(struct qla4_83xx_poll));
delay = (long)p_hdr->delay;
if (!delay) {
for (i = 0; i < p_hdr->count; i++, p_entry++) {
qla4_83xx_poll_reg(ha, p_entry->arg1, delay,
p_poll->test_mask,
p_poll->test_value);
}
} else {
for (i = 0; i < p_hdr->count; i++, p_entry++) {
if (qla4_83xx_poll_reg(ha, p_entry->arg1, delay,
p_poll->test_mask,
p_poll->test_value)) {
qla4_83xx_rd_reg_indirect(ha, p_entry->arg1,
&value);
qla4_83xx_rd_reg_indirect(ha, p_entry->arg2,
&value);
}
}
}
}
static void qla4_83xx_poll_write_list(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
long delay;
struct qla4_83xx_quad_entry *p_entry;
struct qla4_83xx_poll *p_poll;
uint32_t i;
p_poll = (struct qla4_83xx_poll *)
((char *)p_hdr + sizeof(struct qla4_83xx_reset_entry_hdr));
p_entry = (struct qla4_83xx_quad_entry *)
((char *)p_poll + sizeof(struct qla4_83xx_poll));
delay = (long)p_hdr->delay;
for (i = 0; i < p_hdr->count; i++, p_entry++) {
qla4_83xx_wr_reg_indirect(ha, p_entry->dr_addr,
p_entry->dr_value);
qla4_83xx_wr_reg_indirect(ha, p_entry->ar_addr,
p_entry->ar_value);
if (delay) {
if (qla4_83xx_poll_reg(ha, p_entry->ar_addr, delay,
p_poll->test_mask,
p_poll->test_value)) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Timeout Error: poll list, item_num %d, entry_num %d\n",
__func__, i,
ha->reset_tmplt.seq_index));
}
}
}
}
static void qla4_83xx_read_modify_write(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
struct qla4_83xx_entry *p_entry;
struct qla4_83xx_rmw *p_rmw_hdr;
uint32_t i;
p_rmw_hdr = (struct qla4_83xx_rmw *)
((char *)p_hdr + sizeof(struct qla4_83xx_reset_entry_hdr));
p_entry = (struct qla4_83xx_entry *)
((char *)p_rmw_hdr + sizeof(struct qla4_83xx_rmw));
for (i = 0; i < p_hdr->count; i++, p_entry++) {
qla4_83xx_rmw_crb_reg(ha, p_entry->arg1, p_entry->arg2,
p_rmw_hdr);
if (p_hdr->delay)
udelay((uint32_t)(p_hdr->delay));
}
}
static void qla4_83xx_pause(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
if (p_hdr->delay)
mdelay((uint32_t)((long)p_hdr->delay));
}
static void qla4_83xx_poll_read_list(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
long delay;
int index;
struct qla4_83xx_quad_entry *p_entry;
struct qla4_83xx_poll *p_poll;
uint32_t i;
uint32_t value;
p_poll = (struct qla4_83xx_poll *)
((char *)p_hdr + sizeof(struct qla4_83xx_reset_entry_hdr));
p_entry = (struct qla4_83xx_quad_entry *)
((char *)p_poll + sizeof(struct qla4_83xx_poll));
delay = (long)p_hdr->delay;
for (i = 0; i < p_hdr->count; i++, p_entry++) {
qla4_83xx_wr_reg_indirect(ha, p_entry->ar_addr,
p_entry->ar_value);
if (delay) {
if (qla4_83xx_poll_reg(ha, p_entry->ar_addr, delay,
p_poll->test_mask,
p_poll->test_value)) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Timeout Error: poll list, Item_num %d, entry_num %d\n",
__func__, i,
ha->reset_tmplt.seq_index));
} else {
index = ha->reset_tmplt.array_index;
qla4_83xx_rd_reg_indirect(ha, p_entry->dr_addr,
&value);
ha->reset_tmplt.array[index++] = value;
if (index == QLA83XX_MAX_RESET_SEQ_ENTRIES)
ha->reset_tmplt.array_index = 1;
}
}
}
}
static void qla4_83xx_seq_end(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
ha->reset_tmplt.seq_end = 1;
}
static void qla4_83xx_template_end(struct scsi_qla_host *ha,
struct qla4_83xx_reset_entry_hdr *p_hdr)
{
ha->reset_tmplt.template_end = 1;
if (ha->reset_tmplt.seq_error == 0) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Reset sequence completed SUCCESSFULLY.\n",
__func__));
} else {
ql4_printk(KERN_ERR, ha, "%s: Reset sequence completed with some timeout errors.\n",
__func__);
}
}
/**
* qla4_83xx_process_reset_template - Process reset template.
*
* Process all entries in reset template till entry with SEQ_END opcode,
* which indicates end of the reset template processing. Each entry has a
* Reset Entry header, entry opcode/command, with size of the entry, number
* of entries in sub-sequence and delay in microsecs or timeout in millisecs.
*
* @ha : Pointer to adapter structure
* @p_buff : Common reset entry header.
**/
static void qla4_83xx_process_reset_template(struct scsi_qla_host *ha,
char *p_buff)
{
int index, entries;
struct qla4_83xx_reset_entry_hdr *p_hdr;
char *p_entry = p_buff;
ha->reset_tmplt.seq_end = 0;
ha->reset_tmplt.template_end = 0;
entries = ha->reset_tmplt.hdr->entries;
index = ha->reset_tmplt.seq_index;
for (; (!ha->reset_tmplt.seq_end) && (index < entries); index++) {
p_hdr = (struct qla4_83xx_reset_entry_hdr *)p_entry;
switch (p_hdr->cmd) {
case OPCODE_NOP:
break;
case OPCODE_WRITE_LIST:
qla4_83xx_write_list(ha, p_hdr);
break;
case OPCODE_READ_WRITE_LIST:
qla4_83xx_read_write_list(ha, p_hdr);
break;
case OPCODE_POLL_LIST:
qla4_83xx_poll_list(ha, p_hdr);
break;
case OPCODE_POLL_WRITE_LIST:
qla4_83xx_poll_write_list(ha, p_hdr);
break;
case OPCODE_READ_MODIFY_WRITE:
qla4_83xx_read_modify_write(ha, p_hdr);
break;
case OPCODE_SEQ_PAUSE:
qla4_83xx_pause(ha, p_hdr);
break;
case OPCODE_SEQ_END:
qla4_83xx_seq_end(ha, p_hdr);
break;
case OPCODE_TMPL_END:
qla4_83xx_template_end(ha, p_hdr);
break;
case OPCODE_POLL_READ_LIST:
qla4_83xx_poll_read_list(ha, p_hdr);
break;
default:
ql4_printk(KERN_ERR, ha, "%s: Unknown command ==> 0x%04x on entry = %d\n",
__func__, p_hdr->cmd, index);
break;
}
/* Set pointer to next entry in the sequence. */
p_entry += p_hdr->size;
}
ha->reset_tmplt.seq_index = index;
}
static void qla4_83xx_process_stop_seq(struct scsi_qla_host *ha)
{
ha->reset_tmplt.seq_index = 0;
qla4_83xx_process_reset_template(ha, ha->reset_tmplt.stop_offset);
if (ha->reset_tmplt.seq_end != 1)
ql4_printk(KERN_ERR, ha, "%s: Abrupt STOP Sub-Sequence end.\n",
__func__);
}
static void qla4_83xx_process_start_seq(struct scsi_qla_host *ha)
{
qla4_83xx_process_reset_template(ha, ha->reset_tmplt.start_offset);
if (ha->reset_tmplt.template_end != 1)
ql4_printk(KERN_ERR, ha, "%s: Abrupt START Sub-Sequence end.\n",
__func__);
}
static void qla4_83xx_process_init_seq(struct scsi_qla_host *ha)
{
qla4_83xx_process_reset_template(ha, ha->reset_tmplt.init_offset);
if (ha->reset_tmplt.seq_end != 1)
ql4_printk(KERN_ERR, ha, "%s: Abrupt INIT Sub-Sequence end.\n",
__func__);
}
static int qla4_83xx_restart(struct scsi_qla_host *ha)
{
int ret_val = QLA_SUCCESS;
uint32_t idc_ctrl;
qla4_83xx_process_stop_seq(ha);
/*
* Collect minidump.
* If IDC_CTRL BIT1 is set, clear it on going to INIT state and
* don't collect minidump
*/
idc_ctrl = qla4_83xx_rd_reg(ha, QLA83XX_IDC_DRV_CTRL);
if (idc_ctrl & GRACEFUL_RESET_BIT1) {
qla4_83xx_wr_reg(ha, QLA83XX_IDC_DRV_CTRL,
(idc_ctrl & ~GRACEFUL_RESET_BIT1));
ql4_printk(KERN_INFO, ha, "%s: Graceful RESET: Not collecting minidump\n",
__func__);
} else {
qla4_8xxx_get_minidump(ha);
}
qla4_83xx_process_init_seq(ha);
if (qla4_83xx_copy_bootloader(ha)) {
ql4_printk(KERN_ERR, ha, "%s: Copy bootloader, firmware restart failed!\n",
__func__);
ret_val = QLA_ERROR;
goto exit_restart;
}
qla4_83xx_wr_reg(ha, QLA83XX_FW_IMAGE_VALID, QLA83XX_BOOT_FROM_FLASH);
qla4_83xx_process_start_seq(ha);
exit_restart:
return ret_val;
}
int qla4_83xx_start_firmware(struct scsi_qla_host *ha)
{
int ret_val = QLA_SUCCESS;
ret_val = qla4_83xx_restart(ha);
if (ret_val == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: Restart error\n", __func__);
goto exit_start_fw;
} else {
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: Restart done\n",
__func__));
}
ret_val = qla4_83xx_check_cmd_peg_status(ha);
if (ret_val == QLA_ERROR)
ql4_printk(KERN_ERR, ha, "%s: Peg not initialized\n",
__func__);
exit_start_fw:
return ret_val;
}
/*----------------------Interrupt Related functions ---------------------*/
static void qla4_83xx_disable_iocb_intrs(struct scsi_qla_host *ha)
{
if (test_and_clear_bit(AF_83XX_IOCB_INTR_ON, &ha->flags))
qla4_8xxx_intr_disable(ha);
}
static void qla4_83xx_disable_mbox_intrs(struct scsi_qla_host *ha)
{
uint32_t mb_int, ret;
if (test_and_clear_bit(AF_83XX_MBOX_INTR_ON, &ha->flags)) {
ret = readl(&ha->qla4_83xx_reg->mbox_int);
mb_int = ret & ~INT_ENABLE_FW_MB;
writel(mb_int, &ha->qla4_83xx_reg->mbox_int);
writel(1, &ha->qla4_83xx_reg->leg_int_mask);
}
}
void qla4_83xx_disable_intrs(struct scsi_qla_host *ha)
{
qla4_83xx_disable_mbox_intrs(ha);
qla4_83xx_disable_iocb_intrs(ha);
}
static void qla4_83xx_enable_iocb_intrs(struct scsi_qla_host *ha)
{
if (!test_bit(AF_83XX_IOCB_INTR_ON, &ha->flags)) {
qla4_8xxx_intr_enable(ha);
set_bit(AF_83XX_IOCB_INTR_ON, &ha->flags);
}
}
void qla4_83xx_enable_mbox_intrs(struct scsi_qla_host *ha)
{
uint32_t mb_int;
if (!test_bit(AF_83XX_MBOX_INTR_ON, &ha->flags)) {
mb_int = INT_ENABLE_FW_MB;
writel(mb_int, &ha->qla4_83xx_reg->mbox_int);
writel(0, &ha->qla4_83xx_reg->leg_int_mask);
set_bit(AF_83XX_MBOX_INTR_ON, &ha->flags);
}
}
void qla4_83xx_enable_intrs(struct scsi_qla_host *ha)
{
qla4_83xx_enable_mbox_intrs(ha);
qla4_83xx_enable_iocb_intrs(ha);
}
void qla4_83xx_queue_mbox_cmd(struct scsi_qla_host *ha, uint32_t *mbx_cmd,
int incount)
{
int i;
/* Load all mailbox registers, except mailbox 0. */
for (i = 1; i < incount; i++)
writel(mbx_cmd[i], &ha->qla4_83xx_reg->mailbox_in[i]);
writel(mbx_cmd[0], &ha->qla4_83xx_reg->mailbox_in[0]);
/* Set Host Interrupt register to 1, to tell the firmware that
* a mailbox command is pending. Firmware after reading the
* mailbox command, clears the host interrupt register */
writel(HINT_MBX_INT_PENDING, &ha->qla4_83xx_reg->host_intr);
}
void qla4_83xx_process_mbox_intr(struct scsi_qla_host *ha, int outcount)
{
int intr_status;
intr_status = readl(&ha->qla4_83xx_reg->risc_intr);
if (intr_status) {
ha->mbox_status_count = outcount;
ha->isp_ops->interrupt_service_routine(ha, intr_status);
}
}
/**
* qla4_83xx_isp_reset - Resets ISP and aborts all outstanding commands.
* @ha: pointer to host adapter structure.
**/
int qla4_83xx_isp_reset(struct scsi_qla_host *ha)
{
int rval;
uint32_t dev_state;
ha->isp_ops->idc_lock(ha);
dev_state = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DEV_STATE);
if (ql4xdontresethba)
qla4_83xx_set_idc_dontreset(ha);
if (dev_state == QLA8XXX_DEV_READY) {
/* If IDC_CTRL DONTRESETHBA_BIT0 is set dont do reset
* recovery */
if (qla4_83xx_idc_dontreset(ha) == DONTRESET_BIT0) {
ql4_printk(KERN_ERR, ha, "%s: Reset recovery disabled\n",
__func__);
rval = QLA_ERROR;
goto exit_isp_reset;
}
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: HW State: NEED RESET\n",
__func__));
qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DEV_STATE,
QLA8XXX_DEV_NEED_RESET);
} else {
/* If device_state is NEED_RESET, go ahead with
* Reset,irrespective of ql4xdontresethba. This is to allow a
* non-reset-owner to force a reset. Non-reset-owner sets
* the IDC_CTRL BIT0 to prevent Reset-owner from doing a Reset
* and then forces a Reset by setting device_state to
* NEED_RESET. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: HW state already set to NEED_RESET\n",
__func__));
}
/* For ISP8324 and ISP8042, Reset owner is NIC, iSCSI or FCOE based on
* priority and which drivers are present. Unlike ISP8022, the function
* setting NEED_RESET, may not be the Reset owner. */
if (qla4_83xx_can_perform_reset(ha))
set_bit(AF_8XXX_RST_OWNER, &ha->flags);
ha->isp_ops->idc_unlock(ha);
rval = qla4_8xxx_device_state_handler(ha);
ha->isp_ops->idc_lock(ha);
qla4_8xxx_clear_rst_ready(ha);
exit_isp_reset:
ha->isp_ops->idc_unlock(ha);
if (rval == QLA_SUCCESS)
clear_bit(AF_FW_RECOVERY, &ha->flags);
return rval;
}
static void qla4_83xx_dump_pause_control_regs(struct scsi_qla_host *ha)
{
u32 val = 0, val1 = 0;
int i;
qla4_83xx_rd_reg_indirect(ha, QLA83XX_SRE_SHIM_CONTROL, &val);
DEBUG2(ql4_printk(KERN_INFO, ha, "SRE-Shim Ctrl:0x%x\n", val));
/* Port 0 Rx Buffer Pause Threshold Registers. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"Port 0 Rx Buffer Pause Threshold Registers[TC7..TC0]:"));
for (i = 0; i < 8; i++) {
qla4_83xx_rd_reg_indirect(ha,
QLA83XX_PORT0_RXB_PAUSE_THRS + (i * 0x4), &val);
DEBUG2(pr_info("0x%x ", val));
}
DEBUG2(pr_info("\n"));
/* Port 1 Rx Buffer Pause Threshold Registers. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"Port 1 Rx Buffer Pause Threshold Registers[TC7..TC0]:"));
for (i = 0; i < 8; i++) {
qla4_83xx_rd_reg_indirect(ha,
QLA83XX_PORT1_RXB_PAUSE_THRS + (i * 0x4), &val);
DEBUG2(pr_info("0x%x ", val));
}
DEBUG2(pr_info("\n"));
/* Port 0 RxB Traffic Class Max Cell Registers. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"Port 0 RxB Traffic Class Max Cell Registers[3..0]:"));
for (i = 0; i < 4; i++) {
qla4_83xx_rd_reg_indirect(ha,
QLA83XX_PORT0_RXB_TC_MAX_CELL + (i * 0x4), &val);
DEBUG2(pr_info("0x%x ", val));
}
DEBUG2(pr_info("\n"));
/* Port 1 RxB Traffic Class Max Cell Registers. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"Port 1 RxB Traffic Class Max Cell Registers[3..0]:"));
for (i = 0; i < 4; i++) {
qla4_83xx_rd_reg_indirect(ha,
QLA83XX_PORT1_RXB_TC_MAX_CELL + (i * 0x4), &val);
DEBUG2(pr_info("0x%x ", val));
}
DEBUG2(pr_info("\n"));
/* Port 0 RxB Rx Traffic Class Stats. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"Port 0 RxB Rx Traffic Class Stats [TC7..TC0]"));
for (i = 7; i >= 0; i--) {
qla4_83xx_rd_reg_indirect(ha, QLA83XX_PORT0_RXB_TC_STATS, &val);
val &= ~(0x7 << 29); /* Reset bits 29 to 31 */
qla4_83xx_wr_reg_indirect(ha, QLA83XX_PORT0_RXB_TC_STATS,
(val | (i << 29)));
qla4_83xx_rd_reg_indirect(ha, QLA83XX_PORT0_RXB_TC_STATS, &val);
DEBUG2(pr_info("0x%x ", val));
}
DEBUG2(pr_info("\n"));
/* Port 1 RxB Rx Traffic Class Stats. */
DEBUG2(ql4_printk(KERN_INFO, ha,
"Port 1 RxB Rx Traffic Class Stats [TC7..TC0]"));
for (i = 7; i >= 0; i--) {
qla4_83xx_rd_reg_indirect(ha, QLA83XX_PORT1_RXB_TC_STATS, &val);
val &= ~(0x7 << 29); /* Reset bits 29 to 31 */
qla4_83xx_wr_reg_indirect(ha, QLA83XX_PORT1_RXB_TC_STATS,
(val | (i << 29)));
qla4_83xx_rd_reg_indirect(ha, QLA83XX_PORT1_RXB_TC_STATS, &val);
DEBUG2(pr_info("0x%x ", val));
}
DEBUG2(pr_info("\n"));
qla4_83xx_rd_reg_indirect(ha, QLA83XX_PORT2_IFB_PAUSE_THRS, &val);
qla4_83xx_rd_reg_indirect(ha, QLA83XX_PORT3_IFB_PAUSE_THRS, &val1);
DEBUG2(ql4_printk(KERN_INFO, ha,
"IFB-Pause Thresholds: Port 2:0x%x, Port 3:0x%x\n",
val, val1));
}
static void __qla4_83xx_disable_pause(struct scsi_qla_host *ha)
{
int i;
/* set SRE-Shim Control Register */
qla4_83xx_wr_reg_indirect(ha, QLA83XX_SRE_SHIM_CONTROL,
QLA83XX_SET_PAUSE_VAL);
for (i = 0; i < 8; i++) {
/* Port 0 Rx Buffer Pause Threshold Registers. */
qla4_83xx_wr_reg_indirect(ha,
QLA83XX_PORT0_RXB_PAUSE_THRS + (i * 0x4),
QLA83XX_SET_PAUSE_VAL);
/* Port 1 Rx Buffer Pause Threshold Registers. */
qla4_83xx_wr_reg_indirect(ha,
QLA83XX_PORT1_RXB_PAUSE_THRS + (i * 0x4),
QLA83XX_SET_PAUSE_VAL);
}
for (i = 0; i < 4; i++) {
/* Port 0 RxB Traffic Class Max Cell Registers. */
qla4_83xx_wr_reg_indirect(ha,
QLA83XX_PORT0_RXB_TC_MAX_CELL + (i * 0x4),
QLA83XX_SET_TC_MAX_CELL_VAL);
/* Port 1 RxB Traffic Class Max Cell Registers. */
qla4_83xx_wr_reg_indirect(ha,
QLA83XX_PORT1_RXB_TC_MAX_CELL + (i * 0x4),
QLA83XX_SET_TC_MAX_CELL_VAL);
}
qla4_83xx_wr_reg_indirect(ha, QLA83XX_PORT2_IFB_PAUSE_THRS,
QLA83XX_SET_PAUSE_VAL);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_PORT3_IFB_PAUSE_THRS,
QLA83XX_SET_PAUSE_VAL);
ql4_printk(KERN_INFO, ha, "Disabled pause frames successfully.\n");
}
/**
* qla4_83xx_eport_init - Initialize EPort.
* @ha: Pointer to host adapter structure.
*
* If EPort hardware is in reset state before disabling pause, there would be
* serious hardware wedging issues. To prevent this perform eport init everytime
* before disabling pause frames.
**/
static void qla4_83xx_eport_init(struct scsi_qla_host *ha)
{
/* Clear the 8 registers */
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_REG, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_PORT0, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_PORT1, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_PORT2, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_PORT3, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_SRE_SHIM, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_EPG_SHIM, 0x0);
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_ETHER_PCS, 0x0);
/* Write any value to Reset Control register */
qla4_83xx_wr_reg_indirect(ha, QLA83XX_RESET_CONTROL, 0xFF);
ql4_printk(KERN_INFO, ha, "EPORT is out of reset.\n");
}
void qla4_83xx_disable_pause(struct scsi_qla_host *ha)
{
ha->isp_ops->idc_lock(ha);
/* Before disabling pause frames, ensure that eport is not in reset */
qla4_83xx_eport_init(ha);
qla4_83xx_dump_pause_control_regs(ha);
__qla4_83xx_disable_pause(ha);
ha->isp_ops->idc_unlock(ha);
}
/**
* qla4_83xx_is_detached - Check if we are marked invisible.
* @ha: Pointer to host adapter structure.
**/
int qla4_83xx_is_detached(struct scsi_qla_host *ha)
{
uint32_t drv_active;
drv_active = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DRV_ACTIVE);
if (test_bit(AF_INIT_DONE, &ha->flags) &&
!(drv_active & (1 << ha->func_num))) {
DEBUG2(ql4_printk(KERN_INFO, ha, "%s: drv_active = 0x%X\n",
__func__, drv_active));
return QLA_SUCCESS;
}
return QLA_ERROR;
}