From: Mike Christie <michaelc@xxxxxxxxxxx>
This patch adds target reset functionalty.
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
Acked-by: David Somayajulu <david.somayajulu@xxxxxxxxxx>
---
drivers/scsi/qla4xxx/ql4_fw.h | 1 +
drivers/scsi/qla4xxx/ql4_glbl.h | 2 +
drivers/scsi/qla4xxx/ql4_mbx.c | 39 ++++++++++++++++++
drivers/scsi/qla4xxx/ql4_os.c | 82 ++++++++++++++++++++++++++++++---------
4 files changed, 105 insertions(+), 19 deletions(-)
diff --git a/drivers/scsi/qla4xxx/ql4_fw.h b/drivers/scsi/qla4xxx/ql4_fw.h
index fe415ec..ed8ee66 100644
--- a/drivers/scsi/qla4xxx/ql4_fw.h
+++ b/drivers/scsi/qla4xxx/ql4_fw.h
@@ -216,6 +216,7 @@ union external_hw_config_reg {
#define MBOX_CMD_ABOUT_FW 0x0009
#define MBOX_CMD_PING 0x000B
#define MBOX_CMD_LUN_RESET 0x0016
+#define MBOX_CMD_TARGET_WARM_RESET 0x0017
#define MBOX_CMD_GET_MANAGEMENT_DATA 0x001E
#define MBOX_CMD_GET_FW_STATUS 0x001F
#define MBOX_CMD_SET_ISNS_SERVICE 0x0021
diff --git a/drivers/scsi/qla4xxx/ql4_glbl.h b/drivers/scsi/qla4xxx/ql4_glbl.h
index a3608e0..b403a17 100644
--- a/drivers/scsi/qla4xxx/ql4_glbl.h
+++ b/drivers/scsi/qla4xxx/ql4_glbl.h
@@ -27,6 +27,8 @@ int qla4xxx_relogin_device(struct scsi_qla_host * ha,
struct ddb_entry * ddb_entry);
int qla4xxx_reset_lun(struct scsi_qla_host * ha, struct ddb_entry * ddb_entry,
int lun);
+int qla4xxx_reset_target(struct scsi_qla_host * ha,
+ struct ddb_entry * ddb_entry);
int qla4xxx_get_flash(struct scsi_qla_host * ha, dma_addr_t dma_addr,
uint32_t offset, uint32_t len);
int qla4xxx_get_firmware_status(struct scsi_qla_host * ha);
diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index 35cd73c..c577d79 100644
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -713,6 +713,45 @@ int qla4xxx_reset_lun(struct scsi_qla_host * ha, struct ddb_entry * ddb_entry,
return status;
}
+/**
+ * qla4xxx_reset_target - issues target Reset
+ * @ha: Pointer to host adapter structure.
+ * @db_entry: Pointer to device database entry
+ * @un_entry: Pointer to lun entry structure
+ *
+ * This routine performs a TARGET RESET on the specified target.
+ * The caller must ensure that the ddb_entry pointers
+ * are valid before calling this routine.
+ **/
+int qla4xxx_reset_target(struct scsi_qla_host *ha,
+ struct ddb_entry *ddb_entry)
+{
+ uint32_t mbox_cmd[MBOX_REG_COUNT];
+ uint32_t mbox_sts[MBOX_REG_COUNT];
+ int status = QLA_SUCCESS;
+
+ DEBUG2(printk("scsi%ld:%d: target reset issued\n", ha->host_no,
+ ddb_entry->os_target_id));
+
+ /*
+ * Send target reset command to ISP, so that the ISP will return all
+ * outstanding requests with RESET status
+ */
+ memset(&mbox_cmd, 0, sizeof(mbox_cmd));
+ memset(&mbox_sts, 0, sizeof(mbox_sts));
+
+ mbox_cmd[0] = MBOX_CMD_TARGET_WARM_RESET;
+ mbox_cmd[1] = ddb_entry->fw_ddb_index;
+ mbox_cmd[5] = 0x01; /* Immediate Command Enable */
+
+ qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0],
+ &mbox_sts[0]);
+ if (mbox_sts[0] != MBOX_STS_COMMAND_COMPLETE &&
+ mbox_sts[0] != MBOX_STS_COMMAND_ERROR)
+ status = QLA_ERROR;
+
+ return status;
+}
int qla4xxx_get_flash(struct scsi_qla_host * ha, dma_addr_t dma_addr,
uint32_t offset, uint32_t len)
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index c3c59d7..8c31fe5 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -71,6 +71,7 @@ static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
void (*done) (struct scsi_cmnd *));
static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
+static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
static int qla4xxx_slave_alloc(struct scsi_device *device);
static int qla4xxx_slave_configure(struct scsi_device *device);
@@ -83,6 +84,7 @@ static struct scsi_host_template qla4xxx_driver_template = {
.queuecommand = qla4xxx_queuecommand,
.eh_device_reset_handler = qla4xxx_eh_device_reset,
+ .eh_target_reset_handler = qla4xxx_eh_target_reset,
.eh_host_reset_handler = qla4xxx_eh_host_reset,
.slave_configure = qla4xxx_slave_configure,
@@ -1478,7 +1480,7 @@ static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
}
/**
- * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
+ * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
* @ha: pointer to to HBA
* @t: target id
* @l: lun id
@@ -1486,20 +1488,22 @@ static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
* This function waits for all outstanding commands to a lun to complete. It
* returns 0 if all pending commands are returned and 1 otherwise.
**/
-static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
- int t, int l)
+static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
+ struct scsi_target *stgt,
+ struct scsi_device *sdev)
{
int cnt;
int status = 0;
struct scsi_cmnd *cmd;
/*
- * Waiting for all commands for the designated target in the active
- * array
+ * Waiting for all commands for the designated target or dev
+ * in the active array
*/
for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
cmd = scsi_host_find_tag(ha->host, cnt);
- if (cmd && cmd->device->id == t && cmd->device->lun == l) {
+ if (cmd && stgt == scsi_target(cmd->device) &&
+ (!sdev || sdev == cmd->device)) {
if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
status++;
break;
@@ -1547,19 +1551,12 @@ static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
/* Send marker. */
ha->marker_needed = 1;
- /*
- * If we are coming down the EH path, wait for all commands to complete
- * for the device.
- */
- if (cmd->device->host->shost_state == SHOST_RECOVERY) {
- if (qla4xxx_eh_wait_for_active_target_commands(ha,
- cmd->device->id,
- cmd->device->lun)){
- dev_info(&ha->pdev->dev,
- "DEVICE RESET FAILED - waiting for "
- "commands.\n");
- goto eh_dev_reset_done;
- }
+ if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
+ cmd->device)) {
+ dev_info(&ha->pdev->dev,
+ "DEVICE RESET FAILED - waiting for "
+ "commands.\n");
+ goto eh_dev_reset_done;
}
dev_info(&ha->pdev->dev,
@@ -1575,6 +1572,53 @@ eh_dev_reset_done:
}
/**
+ * qla4xxx_eh_target_reset - callback for target reset.
+ * @cmd: Pointer to Linux's SCSI command structure
+ *
+ * This routine is called by the Linux OS to reset the target.
+ **/
+static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
+{
+ struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
+ struct ddb_entry *ddb_entry = cmd->device->hostdata;
+ int stat;
+
+ if (!ddb_entry)
+ return FAILED;
+
+ starget_printk(KERN_INFO, scsi_target(cmd->device),
+ "WARM TARGET RESET ISSUED.\n");
+
+ DEBUG2(printk(KERN_INFO
+ "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
+ "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
+ ha->host_no, cmd, jiffies, cmd->timeout_per_command / HZ,
+ ha->dpc_flags, cmd->result, cmd->allowed));
+
+ stat = qla4xxx_reset_target(ha, ddb_entry);
+ if (stat != QLA_SUCCESS) {
+ starget_printk(KERN_INFO, scsi_target(cmd->device),
+ "WARM TARGET RESET FAILED.\n");
+ return FAILED;
+ }
+
+ /* Send marker. */
+ ha->marker_needed = 1;
+
+ if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
+ NULL)) {
+ starget_printk(KERN_INFO, scsi_target(cmd->device),
+ "WARM TARGET DEVICE RESET FAILED - "
+ "waiting for commands.\n");
+ return FAILED;
+ }
+
+ starget_printk(KERN_INFO, scsi_target(cmd->device),
+ "WARM TARGET RESET SUCCEEDED.\n");
+ return SUCCESS;
+}
+
+/**
* qla4xxx_eh_host_reset - kernel callback
* @cmd: Pointer to Linux's SCSI command structure
*
--
1.5.4.1
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