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linux/drivers/scsi/qla4xxx/ql4_init.c
Mike Christie 50a29aec9c [SCSI] qla4xxx: fix host reset dpc race 
The host reset callout could be starting to reset the hba at the same
time the dpc thread is. This creates lots of problems because they both
want to do wierd things with the firmware and interrupts, etc.

This patch just has the host reset function fully shutdown the dpc
thread before resetting the hba.

This patch also moves the setting of the session online bit to fix
a potential race with the dpc thread and iscsi recovery thread.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Acked-by: David C Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-03-05 12:03:17 -06:00

1352 lines
39 KiB
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/*
* QLogic iSCSI HBA Driver
* Copyright (c) 2003-2006 QLogic Corporation
*
* See LICENSE.qla4xxx for copyright and licensing details.
*/
#include <scsi/iscsi_if.h>
#include "ql4_def.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"
static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
uint32_t fw_ddb_index);
static void ql4xxx_set_mac_number(struct scsi_qla_host *ha)
{
uint32_t value;
uint8_t func_number;
unsigned long flags;
/* Get the function number */
spin_lock_irqsave(&ha->hardware_lock, flags);
value = readw(&ha->reg->ctrl_status);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
func_number = (uint8_t) ((value >> 4) & 0x30);
switch (value & ISP_CONTROL_FN_MASK) {
case ISP_CONTROL_FN0_SCSI:
ha->mac_index = 1;
break;
case ISP_CONTROL_FN1_SCSI:
ha->mac_index = 3;
break;
default:
DEBUG2(printk("scsi%ld: %s: Invalid function number, "
"ispControlStatus = 0x%x\n", ha->host_no,
__func__, value));
break;
}
DEBUG2(printk("scsi%ld: %s: mac_index %d.\n", ha->host_no, __func__,
ha->mac_index));
}
/**
* qla4xxx_free_ddb - deallocate ddb
* @ha: pointer to host adapter structure.
* @ddb_entry: pointer to device database entry
*
* This routine deallocates and unlinks the specified ddb_entry from the
* adapter's
**/
static void qla4xxx_free_ddb(struct scsi_qla_host *ha,
struct ddb_entry *ddb_entry)
{
/* Remove device entry from list */
list_del_init(&ddb_entry->list);
/* Remove device pointer from index mapping arrays */
ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] =
(struct ddb_entry *) INVALID_ENTRY;
ha->tot_ddbs--;
/* Free memory and scsi-ml struct for device entry */
qla4xxx_destroy_sess(ddb_entry);
}
/**
* qla4xxx_free_ddb_list - deallocate all ddbs
* @ha: pointer to host adapter structure.
*
* This routine deallocates and removes all devices on the sppecified adapter.
**/
void qla4xxx_free_ddb_list(struct scsi_qla_host *ha)
{
struct list_head *ptr;
struct ddb_entry *ddb_entry;
while (!list_empty(&ha->ddb_list)) {
ptr = ha->ddb_list.next;
/* Free memory for device entry and remove */
ddb_entry = list_entry(ptr, struct ddb_entry, list);
qla4xxx_free_ddb(ha, ddb_entry);
}
}
/**
* qla4xxx_init_rings - initialize hw queues
* @ha: pointer to host adapter structure.
*
* This routine initializes the internal queues for the specified adapter.
* The QLA4010 requires us to restart the queues at index 0.
* The QLA4000 doesn't care, so just default to QLA4010's requirement.
**/
int qla4xxx_init_rings(struct scsi_qla_host *ha)
{
unsigned long flags = 0;
/* Initialize request queue. */
spin_lock_irqsave(&ha->hardware_lock, flags);
ha->request_out = 0;
ha->request_in = 0;
ha->request_ptr = &ha->request_ring[ha->request_in];
ha->req_q_count = REQUEST_QUEUE_DEPTH;
/* Initialize response queue. */
ha->response_in = 0;
ha->response_out = 0;
ha->response_ptr = &ha->response_ring[ha->response_out];
/*
* Initialize DMA Shadow registers. The firmware is really supposed to
* take care of this, but on some uniprocessor systems, the shadow
* registers aren't cleared-- causing the interrupt_handler to think
* there are responses to be processed when there aren't.
*/
ha->shadow_regs->req_q_out = __constant_cpu_to_le32(0);
ha->shadow_regs->rsp_q_in = __constant_cpu_to_le32(0);
wmb();
writel(0, &ha->reg->req_q_in);
writel(0, &ha->reg->rsp_q_out);
readl(&ha->reg->rsp_q_out);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return QLA_SUCCESS;
}
/**
* qla4xxx_validate_mac_address - validate adapter MAC address(es)
* @ha: pointer to host adapter structure.
*
**/
static int qla4xxx_validate_mac_address(struct scsi_qla_host *ha)
{
struct flash_sys_info *sys_info;
dma_addr_t sys_info_dma;
int status = QLA_ERROR;
sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
&sys_info_dma, GFP_KERNEL);
if (sys_info == NULL) {
DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
ha->host_no, __func__));
goto exit_validate_mac_no_free;
}
memset(sys_info, 0, sizeof(*sys_info));
/* Get flash sys info */
if (qla4xxx_get_flash(ha, sys_info_dma, FLASH_OFFSET_SYS_INFO,
sizeof(*sys_info)) != QLA_SUCCESS) {
DEBUG2(printk("scsi%ld: %s: get_flash FLASH_OFFSET_SYS_INFO "
"failed\n", ha->host_no, __func__));
goto exit_validate_mac;
}
/* Save M.A.C. address & serial_number */
memcpy(ha->my_mac, &sys_info->physAddr[0].address[0],
min(sizeof(ha->my_mac),
sizeof(sys_info->physAddr[0].address)));
memcpy(ha->serial_number, &sys_info->acSerialNumber,
min(sizeof(ha->serial_number),
sizeof(sys_info->acSerialNumber)));
status = QLA_SUCCESS;
exit_validate_mac:
dma_free_coherent(&ha->pdev->dev, sizeof(*sys_info), sys_info,
sys_info_dma);
exit_validate_mac_no_free:
return status;
}
/**
* qla4xxx_init_local_data - initialize adapter specific local data
* @ha: pointer to host adapter structure.
*
**/
static int qla4xxx_init_local_data(struct scsi_qla_host *ha)
{
/* Initilize aen queue */
ha->aen_q_count = MAX_AEN_ENTRIES;
return qla4xxx_get_firmware_status(ha);
}
static int qla4xxx_fw_ready(struct scsi_qla_host *ha)
{
uint32_t timeout_count;
int ready = 0;
DEBUG2(dev_info(&ha->pdev->dev, "Waiting for Firmware Ready..\n"));
for (timeout_count = ADAPTER_INIT_TOV; timeout_count > 0;
timeout_count--) {
if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
qla4xxx_get_dhcp_ip_address(ha);
/* Get firmware state. */
if (qla4xxx_get_firmware_state(ha) != QLA_SUCCESS) {
DEBUG2(printk("scsi%ld: %s: unable to get firmware "
"state\n", ha->host_no, __func__));
break;
}
if (ha->firmware_state & FW_STATE_ERROR) {
DEBUG2(printk("scsi%ld: %s: an unrecoverable error has"
" occurred\n", ha->host_no, __func__));
break;
}
if (ha->firmware_state & FW_STATE_CONFIG_WAIT) {
/*
* The firmware has not yet been issued an Initialize
* Firmware command, so issue it now.
*/
if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR)
break;
/* Go back and test for ready state - no wait. */
continue;
}
if (ha->firmware_state == FW_STATE_READY) {
DEBUG2(dev_info(&ha->pdev->dev, "Firmware Ready..\n"));
/* The firmware is ready to process SCSI commands. */
DEBUG2(dev_info(&ha->pdev->dev,
"scsi%ld: %s: MEDIA TYPE - %s\n",
ha->host_no,
__func__, (ha->addl_fw_state &
FW_ADDSTATE_OPTICAL_MEDIA)
!= 0 ? "OPTICAL" : "COPPER"));
DEBUG2(dev_info(&ha->pdev->dev,
"scsi%ld: %s: DHCP STATE Enabled "
"%s\n",
ha->host_no, __func__,
(ha->addl_fw_state &
FW_ADDSTATE_DHCP_ENABLED) != 0 ?
"YES" : "NO"));
DEBUG2(dev_info(&ha->pdev->dev,
"scsi%ld: %s: LINK %s\n",
ha->host_no, __func__,
(ha->addl_fw_state &
FW_ADDSTATE_LINK_UP) != 0 ?
"UP" : "DOWN"));
DEBUG2(dev_info(&ha->pdev->dev,
"scsi%ld: %s: iSNS Service "
"Started %s\n",
ha->host_no, __func__,
(ha->addl_fw_state &
FW_ADDSTATE_ISNS_SVC_ENABLED) != 0 ?
"YES" : "NO"));
ready = 1;
break;
}
DEBUG2(printk("scsi%ld: %s: waiting on fw, state=%x:%x - "
"seconds expired= %d\n", ha->host_no, __func__,
ha->firmware_state, ha->addl_fw_state,
timeout_count));
if (is_qla4032(ha) &&
!(ha->addl_fw_state & FW_ADDSTATE_LINK_UP) &&
(timeout_count < ADAPTER_INIT_TOV - 5)) {
break;
}
msleep(1000);
} /* end of for */
if (timeout_count == 0)
DEBUG2(printk("scsi%ld: %s: FW Initialization timed out!\n",
ha->host_no, __func__));
if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS) {
DEBUG2(printk("scsi%ld: %s: FW is reporting its waiting to"
" grab an IP address from DHCP server\n",
ha->host_no, __func__));
ready = 1;
}
return ready;
}
/**
* qla4xxx_init_firmware - initializes the firmware.
* @ha: pointer to host adapter structure.
*
**/
static int qla4xxx_init_firmware(struct scsi_qla_host *ha)
{
int status = QLA_ERROR;
dev_info(&ha->pdev->dev, "Initializing firmware..\n");
if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR) {
DEBUG2(printk("scsi%ld: %s: Failed to initialize firmware "
"control block\n", ha->host_no, __func__));
return status;
}
if (!qla4xxx_fw_ready(ha))
return status;
return qla4xxx_get_firmware_status(ha);
}
static struct ddb_entry* qla4xxx_get_ddb_entry(struct scsi_qla_host *ha,
uint32_t fw_ddb_index,
uint32_t *new_tgt)
{
struct dev_db_entry *fw_ddb_entry = NULL;
dma_addr_t fw_ddb_entry_dma;
struct ddb_entry *ddb_entry = NULL;
int found = 0;
uint32_t device_state;
*new_tgt = 0;
/* Make sure the dma buffer is valid */
fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
sizeof(*fw_ddb_entry),
&fw_ddb_entry_dma, GFP_KERNEL);
if (fw_ddb_entry == NULL) {
DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
ha->host_no, __func__));
return NULL;
}
if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
fw_ddb_entry_dma, NULL, NULL,
&device_state, NULL, NULL, NULL) ==
QLA_ERROR) {
DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
"fw_ddb_index %d\n", ha->host_no, __func__,
fw_ddb_index));
return NULL;
}
/* Allocate DDB if not already allocated. */
DEBUG2(printk("scsi%ld: %s: Looking for ddb[%d]\n", ha->host_no,
__func__, fw_ddb_index));
list_for_each_entry(ddb_entry, &ha->ddb_list, list) {
if (memcmp(ddb_entry->iscsi_name, fw_ddb_entry->iscsi_name,
ISCSI_NAME_SIZE) == 0) {
found++;
break;
}
}
if (!found) {
DEBUG2(printk("scsi%ld: %s: ddb[%d] not found - allocating "
"new ddb\n", ha->host_no, __func__,
fw_ddb_index));
*new_tgt = 1;
ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
}
/* if not found allocate new ddb */
dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry), fw_ddb_entry,
fw_ddb_entry_dma);
return ddb_entry;
}
/**
* qla4xxx_update_ddb_entry - update driver's internal ddb
* @ha: pointer to host adapter structure.
* @ddb_entry: pointer to device database structure to be filled
* @fw_ddb_index: index of the ddb entry in fw ddb table
*
* This routine updates the driver's internal device database entry
* with information retrieved from the firmware's device database
* entry for the specified device. The ddb_entry->fw_ddb_index field
* must be initialized prior to calling this routine
*
**/
static int qla4xxx_update_ddb_entry(struct scsi_qla_host *ha,
struct ddb_entry *ddb_entry,
uint32_t fw_ddb_index)
{
struct dev_db_entry *fw_ddb_entry = NULL;
dma_addr_t fw_ddb_entry_dma;
int status = QLA_ERROR;
if (ddb_entry == NULL) {
DEBUG2(printk("scsi%ld: %s: ddb_entry is NULL\n", ha->host_no,
__func__));
goto exit_update_ddb;
}
/* Make sure the dma buffer is valid */
fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
sizeof(*fw_ddb_entry),
&fw_ddb_entry_dma, GFP_KERNEL);
if (fw_ddb_entry == NULL) {
DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
ha->host_no, __func__));
goto exit_update_ddb;
}
if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
fw_ddb_entry_dma, NULL, NULL,
&ddb_entry->fw_ddb_device_state, NULL,
&ddb_entry->tcp_source_port_num,
&ddb_entry->connection_id) ==
QLA_ERROR) {
DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
"fw_ddb_index %d\n", ha->host_no, __func__,
fw_ddb_index));
goto exit_update_ddb;
}
status = QLA_SUCCESS;
ddb_entry->target_session_id = le16_to_cpu(fw_ddb_entry->tsid);
ddb_entry->task_mgmt_timeout =
le16_to_cpu(fw_ddb_entry->def_timeout);
ddb_entry->CmdSn = 0;
ddb_entry->exe_throttle = le16_to_cpu(fw_ddb_entry->exec_throttle);
ddb_entry->default_relogin_timeout =
le16_to_cpu(fw_ddb_entry->def_timeout);
ddb_entry->default_time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
/* Update index in case it changed */
ddb_entry->fw_ddb_index = fw_ddb_index;
ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
ddb_entry->port = le16_to_cpu(fw_ddb_entry->port);
ddb_entry->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
memcpy(&ddb_entry->iscsi_name[0], &fw_ddb_entry->iscsi_name[0],
min(sizeof(ddb_entry->iscsi_name),
sizeof(fw_ddb_entry->iscsi_name)));
memcpy(&ddb_entry->ip_addr[0], &fw_ddb_entry->ip_addr[0],
min(sizeof(ddb_entry->ip_addr), sizeof(fw_ddb_entry->ip_addr)));
DEBUG2(printk("scsi%ld: %s: ddb[%d] - State= %x status= %d.\n",
ha->host_no, __func__, fw_ddb_index,
ddb_entry->fw_ddb_device_state, status));
exit_update_ddb:
if (fw_ddb_entry)
dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
fw_ddb_entry, fw_ddb_entry_dma);
return status;
}
/**
* qla4xxx_alloc_ddb - allocate device database entry
* @ha: Pointer to host adapter structure.
* @fw_ddb_index: Firmware's device database index
*
* This routine allocates a ddb_entry, ititializes some values, and
* inserts it into the ddb list.
**/
static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
uint32_t fw_ddb_index)
{
struct ddb_entry *ddb_entry;
DEBUG2(printk("scsi%ld: %s: fw_ddb_index [%d]\n", ha->host_no,
__func__, fw_ddb_index));
ddb_entry = qla4xxx_alloc_sess(ha);
if (ddb_entry == NULL) {
DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
"to add fw_ddb_index [%d]\n",
ha->host_no, __func__, fw_ddb_index));
return ddb_entry;
}
ddb_entry->fw_ddb_index = fw_ddb_index;
atomic_set(&ddb_entry->port_down_timer, ha->port_down_retry_count);
atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
atomic_set(&ddb_entry->relogin_timer, 0);
atomic_set(&ddb_entry->relogin_retry_count, 0);
atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
list_add_tail(&ddb_entry->list, &ha->ddb_list);
ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
ha->tot_ddbs++;
return ddb_entry;
}
/**
* qla4xxx_configure_ddbs - builds driver ddb list
* @ha: Pointer to host adapter structure.
*
* This routine searches for all valid firmware ddb entries and builds
* an internal ddb list. Ddbs that are considered valid are those with
* a device state of SESSION_ACTIVE.
**/
static int qla4xxx_build_ddb_list(struct scsi_qla_host *ha)
{
int status = QLA_SUCCESS;
uint32_t fw_ddb_index = 0;
uint32_t next_fw_ddb_index = 0;
uint32_t ddb_state;
uint32_t conn_err, err_code;
struct ddb_entry *ddb_entry;
uint32_t new_tgt;
dev_info(&ha->pdev->dev, "Initializing DDBs ...\n");
for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES;
fw_ddb_index = next_fw_ddb_index) {
/* First, let's see if a device exists here */
if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, NULL, 0, NULL,
&next_fw_ddb_index, &ddb_state,
&conn_err, NULL, NULL) ==
QLA_ERROR) {
DEBUG2(printk("scsi%ld: %s: get_ddb_entry, "
"fw_ddb_index %d failed", ha->host_no,
__func__, fw_ddb_index));
return QLA_ERROR;
}
DEBUG2(printk("scsi%ld: %s: Getting DDB[%d] ddbstate=0x%x, "
"next_fw_ddb_index=%d.\n", ha->host_no, __func__,
fw_ddb_index, ddb_state, next_fw_ddb_index));
/* Issue relogin, if necessary. */
if (ddb_state == DDB_DS_SESSION_FAILED ||
ddb_state == DDB_DS_NO_CONNECTION_ACTIVE) {
/* Try and login to device */
DEBUG2(printk("scsi%ld: %s: Login to DDB[%d]\n",
ha->host_no, __func__, fw_ddb_index));
err_code = ((conn_err & 0x00ff0000) >> 16);
if (err_code == 0x1c || err_code == 0x06) {
DEBUG2(printk("scsi%ld: %s send target "
"completed "
"or access denied failure\n",
ha->host_no, __func__));
} else {
qla4xxx_set_ddb_entry(ha, fw_ddb_index, 0);
if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index,
NULL, 0, NULL, &next_fw_ddb_index,
&ddb_state, &conn_err, NULL, NULL)
== QLA_ERROR) {
DEBUG2(printk("scsi%ld: %s:"
"get_ddb_entry %d failed\n",
ha->host_no,
__func__, fw_ddb_index));
return QLA_ERROR;
}
}
}
if (ddb_state != DDB_DS_SESSION_ACTIVE)
goto next_one;
/*
* if fw_ddb with session active state found,
* add to ddb_list
*/
DEBUG2(printk("scsi%ld: %s: DDB[%d] added to list\n",
ha->host_no, __func__, fw_ddb_index));
/* Add DDB to internal our ddb list. */
ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
if (ddb_entry == NULL) {
DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
"for device at fw_ddb_index %d\n",
ha->host_no, __func__, fw_ddb_index));
return QLA_ERROR;
}
/* Fill in the device structure */
if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
QLA_ERROR) {
ha->fw_ddb_index_map[fw_ddb_index] =
(struct ddb_entry *)INVALID_ENTRY;
DEBUG2(printk("scsi%ld: %s: update_ddb_entry failed "
"for fw_ddb_index %d.\n",
ha->host_no, __func__, fw_ddb_index));
return QLA_ERROR;
}
next_one:
/* We know we've reached the last device when
* next_fw_ddb_index is 0 */
if (next_fw_ddb_index == 0)
break;
}
dev_info(&ha->pdev->dev, "DDB list done..\n");
return status;
}
struct qla4_relog_scan {
int halt_wait;
uint32_t conn_err;
uint32_t err_code;
uint32_t fw_ddb_index;
uint32_t next_fw_ddb_index;
uint32_t fw_ddb_device_state;
};
static int qla4_test_rdy(struct scsi_qla_host *ha, struct qla4_relog_scan *rs)
{
struct ddb_entry *ddb_entry;
/*
* Don't want to do a relogin if connection
* error is 0x1c.
*/
rs->err_code = ((rs->conn_err & 0x00ff0000) >> 16);
if (rs->err_code == 0x1c || rs->err_code == 0x06) {
DEBUG2(printk(
"scsi%ld: %s send target"
" completed or "
"access denied failure\n",
ha->host_no, __func__));
} else {
/* We either have a device that is in
* the process of relogging in or a
* device that is waiting to be
* relogged in */
rs->halt_wait = 0;
ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha,
rs->fw_ddb_index);
if (ddb_entry == NULL)
return QLA_ERROR;
if (ddb_entry->dev_scan_wait_to_start_relogin != 0
&& time_after_eq(jiffies,
ddb_entry->
dev_scan_wait_to_start_relogin))
{
ddb_entry->dev_scan_wait_to_start_relogin = 0;
qla4xxx_set_ddb_entry(ha, rs->fw_ddb_index, 0);
}
}
return QLA_SUCCESS;
}
static int qla4_scan_for_relogin(struct scsi_qla_host *ha,
struct qla4_relog_scan *rs)
{
int error;
/* scan for relogins
* ----------------- */
for (rs->fw_ddb_index = 0; rs->fw_ddb_index < MAX_DDB_ENTRIES;
rs->fw_ddb_index = rs->next_fw_ddb_index) {
if (qla4xxx_get_fwddb_entry(ha, rs->fw_ddb_index, NULL, 0,
NULL, &rs->next_fw_ddb_index,
&rs->fw_ddb_device_state,
&rs->conn_err, NULL, NULL)
== QLA_ERROR)
return QLA_ERROR;
if (rs->fw_ddb_device_state == DDB_DS_LOGIN_IN_PROCESS)
rs->halt_wait = 0;
if (rs->fw_ddb_device_state == DDB_DS_SESSION_FAILED ||
rs->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE) {
error = qla4_test_rdy(ha, rs);
if (error)
return error;
}
/* We know we've reached the last device when
* next_fw_ddb_index is 0 */
if (rs->next_fw_ddb_index == 0)
break;
}
return QLA_SUCCESS;
}
/**
* qla4xxx_devices_ready - wait for target devices to be logged in
* @ha: pointer to adapter structure
*
* This routine waits up to ql4xdiscoverywait seconds
* F/W database during driver load time.
**/
static int qla4xxx_devices_ready(struct scsi_qla_host *ha)
{
int error;
unsigned long discovery_wtime;
struct qla4_relog_scan rs;
discovery_wtime = jiffies + (ql4xdiscoverywait * HZ);
DEBUG(printk("Waiting (%d) for devices ...\n", ql4xdiscoverywait));
do {
/* poll for AEN. */
qla4xxx_get_firmware_state(ha);
if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) {
/* Set time-between-relogin timer */
qla4xxx_process_aen(ha, RELOGIN_DDB_CHANGED_AENS);
}
/* if no relogins active or needed, halt discvery wait */
rs.halt_wait = 1;
error = qla4_scan_for_relogin(ha, &rs);
if (rs.halt_wait) {
DEBUG2(printk("scsi%ld: %s: Delay halted. Devices "
"Ready.\n", ha->host_no, __func__));
return QLA_SUCCESS;
}
msleep(2000);
} while (!time_after_eq(jiffies, discovery_wtime));
DEBUG3(qla4xxx_get_conn_event_log(ha));
return QLA_SUCCESS;
}
static void qla4xxx_flush_AENS(struct scsi_qla_host *ha)
{
unsigned long wtime;
/* Flush the 0x8014 AEN from the firmware as a result of
* Auto connect. We are basically doing get_firmware_ddb()
* to determine whether we need to log back in or not.
* Trying to do a set ddb before we have processed 0x8014
* will result in another set_ddb() for the same ddb. In other
* words there will be stale entries in the aen_q.
*/
wtime = jiffies + (2 * HZ);
do {
if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS)
if (ha->firmware_state & (BIT_2 | BIT_0))
return;
if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
msleep(1000);
} while (!time_after_eq(jiffies, wtime));
}
static int qla4xxx_initialize_ddb_list(struct scsi_qla_host *ha)
{
uint16_t fw_ddb_index;
int status = QLA_SUCCESS;
/* free the ddb list if is not empty */
if (!list_empty(&ha->ddb_list))
qla4xxx_free_ddb_list(ha);
for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES; fw_ddb_index++)
ha->fw_ddb_index_map[fw_ddb_index] =
(struct ddb_entry *)INVALID_ENTRY;
ha->tot_ddbs = 0;
qla4xxx_flush_AENS(ha);
/*
* First perform device discovery for active
* fw ddb indexes and build
* ddb list.
*/
if ((status = qla4xxx_build_ddb_list(ha)) == QLA_ERROR)
return status;
/* Wait for an AEN */
qla4xxx_devices_ready(ha);
/*
* Targets can come online after the inital discovery, so processing
* the aens here will catch them.
*/
if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
return status;
}
/**
* qla4xxx_update_ddb_list - update the driver ddb list
* @ha: pointer to host adapter structure.
*
* This routine obtains device information from the F/W database after
* firmware or adapter resets. The device table is preserved.
**/
int qla4xxx_reinitialize_ddb_list(struct scsi_qla_host *ha)
{
int status = QLA_SUCCESS;
struct ddb_entry *ddb_entry, *detemp;
/* Update the device information for all devices. */
list_for_each_entry_safe(ddb_entry, detemp, &ha->ddb_list, list) {
qla4xxx_update_ddb_entry(ha, ddb_entry,
ddb_entry->fw_ddb_index);
if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
DEBUG2(printk ("scsi%ld: %s: ddb index [%d] marked "
"ONLINE\n", ha->host_no, __func__,
ddb_entry->fw_ddb_index));
} else if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
qla4xxx_mark_device_missing(ha, ddb_entry);
}
return status;
}
/**
* qla4xxx_relogin_device - re-establish session
* @ha: Pointer to host adapter structure.
* @ddb_entry: Pointer to device database entry
*
* This routine does a session relogin with the specified device.
* The ddb entry must be assigned prior to making this call.
**/
int qla4xxx_relogin_device(struct scsi_qla_host *ha,
struct ddb_entry * ddb_entry)
{
uint16_t relogin_timer;
relogin_timer = max(ddb_entry->default_relogin_timeout,
(uint16_t)RELOGIN_TOV);
atomic_set(&ddb_entry->relogin_timer, relogin_timer);
DEBUG2(printk("scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
ddb_entry->fw_ddb_index, relogin_timer));
qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index, 0);
return QLA_SUCCESS;
}
static int qla4xxx_config_nvram(struct scsi_qla_host *ha)
{
unsigned long flags;
union external_hw_config_reg extHwConfig;
DEBUG2(printk("scsi%ld: %s: Get EEProm parameters \n", ha->host_no,
__func__));
if (ql4xxx_lock_flash(ha) != QLA_SUCCESS)
return (QLA_ERROR);
if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS) {
ql4xxx_unlock_flash(ha);
return (QLA_ERROR);
}
/* Get EEPRom Parameters from NVRAM and validate */
dev_info(&ha->pdev->dev, "Configuring NVRAM ...\n");
if (qla4xxx_is_nvram_configuration_valid(ha) == QLA_SUCCESS) {
spin_lock_irqsave(&ha->hardware_lock, flags);
extHwConfig.Asuint32_t =
rd_nvram_word(ha, eeprom_ext_hw_conf_offset(ha));
spin_unlock_irqrestore(&ha->hardware_lock, flags);
} else {
/*
* QLogic adapters should always have a valid NVRAM.
* If not valid, do not load.
*/
dev_warn(&ha->pdev->dev,
"scsi%ld: %s: EEProm checksum invalid. "
"Please update your EEPROM\n", ha->host_no,
__func__);
/* set defaults */
if (is_qla4010(ha))
extHwConfig.Asuint32_t = 0x1912;
else if (is_qla4022(ha) | is_qla4032(ha))
extHwConfig.Asuint32_t = 0x0023;
}
DEBUG(printk("scsi%ld: %s: Setting extHwConfig to 0xFFFF%04x\n",
ha->host_no, __func__, extHwConfig.Asuint32_t));
spin_lock_irqsave(&ha->hardware_lock, flags);
writel((0xFFFF << 16) | extHwConfig.Asuint32_t, isp_ext_hw_conf(ha));
readl(isp_ext_hw_conf(ha));
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ql4xxx_unlock_nvram(ha);
ql4xxx_unlock_flash(ha);
return (QLA_SUCCESS);
}
static void qla4x00_pci_config(struct scsi_qla_host *ha)
{
uint16_t w;
int status;
dev_info(&ha->pdev->dev, "Configuring PCI space...\n");
pci_set_master(ha->pdev);
status = pci_set_mwi(ha->pdev);
/*
* We want to respect framework's setting of PCI configuration space
* command register and also want to make sure that all bits of
* interest to us are properly set in command register.
*/
pci_read_config_word(ha->pdev, PCI_COMMAND, &w);
w |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
w &= ~PCI_COMMAND_INTX_DISABLE;
pci_write_config_word(ha->pdev, PCI_COMMAND, w);
}
static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
{
int status = QLA_ERROR;
uint32_t max_wait_time;
unsigned long flags;
uint32_t mbox_status;
dev_info(&ha->pdev->dev, "Starting firmware ...\n");
/*
* Start firmware from flash ROM
*
* WORKAROUND: Stuff a non-constant value that the firmware can
* use as a seed for a random number generator in MB7 prior to
* setting BOOT_ENABLE. Fixes problem where the TCP
* connections use the same TCP ports after each reboot,
* causing some connections to not get re-established.
*/
DEBUG(printk("scsi%d: %s: Start firmware from flash ROM\n",
ha->host_no, __func__));
spin_lock_irqsave(&ha->hardware_lock, flags);
writel(jiffies, &ha->reg->mailbox[7]);
if (is_qla4022(ha) | is_qla4032(ha))
writel(set_rmask(NVR_WRITE_ENABLE),
&ha->reg->u1.isp4022.nvram);
writel(2, &ha->reg->mailbox[6]);
readl(&ha->reg->mailbox[6]);
writel(set_rmask(CSR_BOOT_ENABLE), &ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
/* Wait for firmware to come UP. */
max_wait_time = FIRMWARE_UP_TOV * 4;
do {
uint32_t ctrl_status;
spin_lock_irqsave(&ha->hardware_lock, flags);
ctrl_status = readw(&ha->reg->ctrl_status);
mbox_status = readw(&ha->reg->mailbox[0]);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (ctrl_status & set_rmask(CSR_SCSI_PROCESSOR_INTR))
break;
if (mbox_status == MBOX_STS_COMMAND_COMPLETE)
break;
DEBUG2(printk("scsi%ld: %s: Waiting for boot firmware to "
"complete... ctrl_sts=0x%x, remaining=%d\n",
ha->host_no, __func__, ctrl_status,
max_wait_time));
msleep(250);
} while ((max_wait_time--));
if (mbox_status == MBOX_STS_COMMAND_COMPLETE) {
DEBUG(printk("scsi%ld: %s: Firmware has started\n",
ha->host_no, __func__));
spin_lock_irqsave(&ha->hardware_lock, flags);
writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
status = QLA_SUCCESS;
} else {
printk(KERN_INFO "scsi%ld: %s: Boot firmware failed "
"- mbox status 0x%x\n", ha->host_no, __func__,
mbox_status);
status = QLA_ERROR;
}
return status;
}
int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
{
#define QL4_LOCK_DRVR_WAIT 60
#define QL4_LOCK_DRVR_SLEEP 1
int drvr_wait = QL4_LOCK_DRVR_WAIT;
while (drvr_wait) {
if (ql4xxx_lock_drvr(a) == 0) {
ssleep(QL4_LOCK_DRVR_SLEEP);
if (drvr_wait) {
DEBUG2(printk("scsi%ld: %s: Waiting for "
"Global Init Semaphore(%d)...\n",
a->host_no,
__func__, drvr_wait));
}
drvr_wait -= QL4_LOCK_DRVR_SLEEP;
} else {
DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
"acquired\n", a->host_no, __func__));
return QLA_SUCCESS;
}
}
return QLA_ERROR;
}
/**
* qla4xxx_start_firmware - starts qla4xxx firmware
* @ha: Pointer to host adapter structure.
*
* This routine performs the necessary steps to start the firmware for
* the QLA4010 adapter.
**/
static int qla4xxx_start_firmware(struct scsi_qla_host *ha)
{
unsigned long flags = 0;
uint32_t mbox_status;
int status = QLA_ERROR;
int soft_reset = 1;
int config_chip = 0;
if (is_qla4022(ha) | is_qla4032(ha))
ql4xxx_set_mac_number(ha);
if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
return QLA_ERROR;
spin_lock_irqsave(&ha->hardware_lock, flags);
DEBUG2(printk("scsi%ld: %s: port_ctrl = 0x%08X\n", ha->host_no,
__func__, readw(isp_port_ctrl(ha))));
DEBUG(printk("scsi%ld: %s: port_status = 0x%08X\n", ha->host_no,
__func__, readw(isp_port_status(ha))));
/* Is Hardware already initialized? */
if ((readw(isp_port_ctrl(ha)) & 0x8000) != 0) {
DEBUG(printk("scsi%ld: %s: Hardware has already been "
"initialized\n", ha->host_no, __func__));
/* Receive firmware boot acknowledgement */
mbox_status = readw(&ha->reg->mailbox[0]);
DEBUG2(printk("scsi%ld: %s: H/W Config complete - mbox[0]= "
"0x%x\n", ha->host_no, __func__, mbox_status));
/* Is firmware already booted? */
if (mbox_status == 0) {
/* F/W not running, must be config by net driver */
config_chip = 1;
soft_reset = 0;
} else {
writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS) {
DEBUG2(printk("scsi%ld: %s: Get firmware "
"state -- state = 0x%x\n",
ha->host_no,
__func__, ha->firmware_state));
/* F/W is running */
if (ha->firmware_state &
FW_STATE_CONFIG_WAIT) {
DEBUG2(printk("scsi%ld: %s: Firmware "
"in known state -- "
"config and "
"boot, state = 0x%x\n",
ha->host_no, __func__,
ha->firmware_state));
config_chip = 1;
soft_reset = 0;
}
} else {
DEBUG2(printk("scsi%ld: %s: Firmware in "
"unknown state -- resetting,"
" state = "
"0x%x\n", ha->host_no, __func__,
ha->firmware_state));
}
spin_lock_irqsave(&ha->hardware_lock, flags);
}
} else {
DEBUG(printk("scsi%ld: %s: H/W initialization hasn't been "
"started - resetting\n", ha->host_no, __func__));
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG(printk("scsi%ld: %s: Flags soft_rest=%d, config= %d\n ",
ha->host_no, __func__, soft_reset, config_chip));
if (soft_reset) {
DEBUG(printk("scsi%ld: %s: Issue Soft Reset\n", ha->host_no,
__func__));
status = qla4xxx_soft_reset(ha);
if (status == QLA_ERROR) {
DEBUG(printk("scsi%d: %s: Soft Reset failed!\n",
ha->host_no, __func__));
ql4xxx_unlock_drvr(ha);
return QLA_ERROR;
}
config_chip = 1;
/* Reset clears the semaphore, so acquire again */
if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
return QLA_ERROR;
}
if (config_chip) {
if ((status = qla4xxx_config_nvram(ha)) == QLA_SUCCESS)
status = qla4xxx_start_firmware_from_flash(ha);
}
ql4xxx_unlock_drvr(ha);
if (status == QLA_SUCCESS) {
qla4xxx_get_fw_version(ha);
if (test_and_clear_bit(AF_GET_CRASH_RECORD, &ha->flags))
qla4xxx_get_crash_record(ha);
} else {
DEBUG(printk("scsi%ld: %s: Firmware has NOT started\n",
ha->host_no, __func__));
}
return status;
}
/**
* qla4xxx_initialize_adapter - initiailizes hba
* @ha: Pointer to host adapter structure.
* @renew_ddb_list: Indicates what to do with the adapter's ddb list
* after adapter recovery has completed.
* 0=preserve ddb list, 1=destroy and rebuild ddb list
*
* This routine parforms all of the steps necessary to initialize the adapter.
*
**/
int qla4xxx_initialize_adapter(struct scsi_qla_host *ha,
uint8_t renew_ddb_list)
{
int status = QLA_ERROR;
int8_t ip_address[IP_ADDR_LEN] = {0} ;
ha->eeprom_cmd_data = 0;
qla4x00_pci_config(ha);
qla4xxx_disable_intrs(ha);
/* Initialize the Host adapter request/response queues and firmware */
if (qla4xxx_start_firmware(ha) == QLA_ERROR)
goto exit_init_hba;
if (qla4xxx_validate_mac_address(ha) == QLA_ERROR)
goto exit_init_hba;
if (qla4xxx_init_local_data(ha) == QLA_ERROR)
goto exit_init_hba;
status = qla4xxx_init_firmware(ha);
if (status == QLA_ERROR)
goto exit_init_hba;
/*
* FW is waiting to get an IP address from DHCP server: Skip building
* the ddb_list and wait for DHCP lease acquired aen to come in
* followed by 0x8014 aen" to trigger the tgt discovery process.
*/
if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)
goto exit_init_online;
/* Skip device discovery if ip and subnet is zero */
if (memcmp(ha->ip_address, ip_address, IP_ADDR_LEN) == 0 ||
memcmp(ha->subnet_mask, ip_address, IP_ADDR_LEN) == 0)
goto exit_init_online;
if (renew_ddb_list == PRESERVE_DDB_LIST) {
/*
* We want to preserve lun states (i.e. suspended, etc.)
* for recovery initiated by the driver. So just update
* the device states for the existing ddb_list.
*/
qla4xxx_reinitialize_ddb_list(ha);
} else if (renew_ddb_list == REBUILD_DDB_LIST) {
/*
* We want to build the ddb_list from scratch during
* driver initialization and recovery initiated by the
* INT_HBA_RESET IOCTL.
*/
status = qla4xxx_initialize_ddb_list(ha);
if (status == QLA_ERROR) {
DEBUG2(printk("%s(%ld) Error occurred during build"
"ddb list\n", __func__, ha->host_no));
goto exit_init_hba;
}
}
if (!ha->tot_ddbs) {
DEBUG2(printk("scsi%ld: Failed to initialize devices or none "
"present in Firmware device database\n",
ha->host_no));
}
exit_init_online:
set_bit(AF_ONLINE, &ha->flags);
exit_init_hba:
return status;
}
/**
* qla4xxx_add_device_dynamically - ddb addition due to an AEN
* @ha: Pointer to host adapter structure.
* @fw_ddb_index: Firmware's device database index
*
* This routine processes adds a device as a result of an 8014h AEN.
**/
static void qla4xxx_add_device_dynamically(struct scsi_qla_host *ha,
uint32_t fw_ddb_index)
{
struct ddb_entry * ddb_entry;
uint32_t new_tgt;
/* First allocate a device structure */
ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
if (ddb_entry == NULL) {
DEBUG2(printk(KERN_WARNING
"scsi%ld: Unable to allocate memory to add "
"fw_ddb_index %d\n", ha->host_no, fw_ddb_index));
return;
}
if (!new_tgt && (ddb_entry->fw_ddb_index != fw_ddb_index)) {
/* Target has been bound to a new fw_ddb_index */
qla4xxx_free_ddb(ha, ddb_entry);
ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
if (ddb_entry == NULL) {
DEBUG2(printk(KERN_WARNING
"scsi%ld: Unable to allocate memory"
" to add fw_ddb_index %d\n",
ha->host_no, fw_ddb_index));
return;
}
}
if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
QLA_ERROR) {
ha->fw_ddb_index_map[fw_ddb_index] =
(struct ddb_entry *)INVALID_ENTRY;
DEBUG2(printk(KERN_WARNING
"scsi%ld: failed to add new device at index "
"[%d]\n Unable to retrieve fw ddb entry\n",
ha->host_no, fw_ddb_index));
qla4xxx_free_ddb(ha, ddb_entry);
return;
}
if (qla4xxx_add_sess(ddb_entry)) {
DEBUG2(printk(KERN_WARNING
"scsi%ld: failed to add new device at index "
"[%d]\n Unable to add connection and session\n",
ha->host_no, fw_ddb_index));
qla4xxx_free_ddb(ha, ddb_entry);
}
}
/**
* qla4xxx_process_ddb_changed - process ddb state change
* @ha - Pointer to host adapter structure.
* @fw_ddb_index - Firmware's device database index
* @state - Device state
*
* This routine processes a Decive Database Changed AEN Event.
**/
int qla4xxx_process_ddb_changed(struct scsi_qla_host *ha,
uint32_t fw_ddb_index, uint32_t state)
{
struct ddb_entry * ddb_entry;
uint32_t old_fw_ddb_device_state;
/* check for out of range index */
if (fw_ddb_index >= MAX_DDB_ENTRIES)
return QLA_ERROR;
/* Get the corresponging ddb entry */
ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
/* Device does not currently exist in our database. */
if (ddb_entry == NULL) {
if (state == DDB_DS_SESSION_ACTIVE)
qla4xxx_add_device_dynamically(ha, fw_ddb_index);
return QLA_SUCCESS;
}
/* Device already exists in our database. */
old_fw_ddb_device_state = ddb_entry->fw_ddb_device_state;
DEBUG2(printk("scsi%ld: %s DDB - old state= 0x%x, new state=0x%x for "
"index [%d]\n", ha->host_no, __func__,
ddb_entry->fw_ddb_device_state, state, fw_ddb_index));
if (old_fw_ddb_device_state == state &&
state == DDB_DS_SESSION_ACTIVE) {
/* Do nothing, state not changed. */
return QLA_SUCCESS;
}
ddb_entry->fw_ddb_device_state = state;
/* Device is back online. */
if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
atomic_set(&ddb_entry->port_down_timer,
ha->port_down_retry_count);
atomic_set(&ddb_entry->relogin_retry_count, 0);
atomic_set(&ddb_entry->relogin_timer, 0);
clear_bit(DF_RELOGIN, &ddb_entry->flags);
clear_bit(DF_NO_RELOGIN, &ddb_entry->flags);
iscsi_unblock_session(ddb_entry->sess);
iscsi_session_event(ddb_entry->sess,
ISCSI_KEVENT_CREATE_SESSION);
/*
* Change the lun state to READY in case the lun TIMEOUT before
* the device came back.
*/
} else {
/* Device went away, try to relogin. */
/* Mark device missing */
if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
qla4xxx_mark_device_missing(ha, ddb_entry);
/*
* Relogin if device state changed to a not active state.
* However, do not relogin if this aen is a result of an IOCTL
* logout (DF_NO_RELOGIN) or if this is a discovered device.
*/
if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_FAILED &&
!test_bit(DF_RELOGIN, &ddb_entry->flags) &&
!test_bit(DF_NO_RELOGIN, &ddb_entry->flags) &&
!test_bit(DF_ISNS_DISCOVERED, &ddb_entry->flags)) {
/*
* This triggers a relogin. After the relogin_timer
* expires, the relogin gets scheduled. We must wait a
* minimum amount of time since receiving an 0x8014 AEN
* with failed device_state or a logout response before
* we can issue another relogin.
*/
/* Firmware padds this timeout: (time2wait +1).
* Driver retry to login should be longer than F/W.
* Otherwise F/W will fail
* set_ddb() mbx cmd with 0x4005 since it still
* counting down its time2wait.
*/
atomic_set(&ddb_entry->relogin_timer, 0);
atomic_set(&ddb_entry->retry_relogin_timer,
ddb_entry->default_time2wait + 4);
}
}
return QLA_SUCCESS;
}
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