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From: Yang, Bo on 5 Aug 2010 16:30
RESUBMIT requested by James Bottomley:

During the Online Controller Reset (OCR), all applications cmds need to wait for the OCR to finish, then can issue new cmds to FW.

Signed-off-by Bo Yang<bo.yang(a)lsi.com>

---
drivers/scsi/megaraid/megaraid_sas.c | 169 ++++++++++++++++++++++++++++++++++-
drivers/scsi/megaraid/megaraid_sas.h | 6 +
2 files changed, 173 insertions(+), 2 deletions(-)

diff -rupN old/drivers/scsi/megaraid/megaraid_sas.c new/drivers/scsi/megaraid/megaraid_sas.c
--- old/drivers/scsi/megaraid/megaraid_sas.c 2010-06-17 08:10:50.000000000 -0400
+++ new/drivers/scsi/megaraid/megaraid_sas.c 2010-06-17 08:42:32.000000000 -0400
@@ -107,6 +107,12 @@ static void
megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
u8 alt_status);

+static int megasas_transition_to_ready(struct megasas_instance *instance);
+static int megasas_get_pd_list(struct megasas_instance *instance);
+static int megasas_issue_init_mfi(struct megasas_instance *instance);
+static int megasas_register_aen(struct megasas_instance *instance,
+ u32 seq_num, u32 class_locale_word);
+
/**
* megasas_get_cmd - Get a command from the free pool
* @instance: Adapter soft state
@@ -1471,6 +1477,18 @@ static int megasas_slave_alloc(struct sc
return 0;
}

+static void megaraid_sas_kill_hba(struct megasas_instance *instance)
+{
+ if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+ (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+ writel(MFI_STOP_ADP,
+ &instance->reg_set->reserved_0[0]);
+ } else {
+ writel(MFI_STOP_ADP,
+ &instance->reg_set->inbound_doorbell);
+ }
+}
+
/**
* megasas_complete_cmd_dpc - Returns FW's controller structure
* @instance_addr: Address of adapter soft state
@@ -2063,6 +2081,32 @@ megasas_complete_cmd(struct megasas_inst
}

/**
+ * megasas_issue_pending_cmds_again - issue all pending cmds
+ * in FW again because of the fw reset
+ * @instance: Adapter soft state
+ */
+static inline void
+megasas_issue_pending_cmds_again(struct megasas_instance *instance)
+{
+ return;
+}
+
+/**
+ * Move the internal reset pending commands to a deferred queue.
+ *
+ * We move the commands pending at internal reset time to a
+ * pending queue. This queue would be flushed after successful
+ * completion of the internal reset sequence. if the internal reset
+ * did not complete in time, the kernel reset handler would flush
+ * these commands.
+ **/
+
+static void
+megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
+{
+}
+
+/**
* megasas_deplete_reply_queue - Processes all completed commands
* @instance: Adapter soft state
* @alt_status: Alternate status to be returned to
@@ -2075,6 +2119,7 @@ megasas_deplete_reply_queue(struct megas
u8 alt_status)
{
u32 mfiStatus;
+ u32 fw_state;

if ((mfiStatus = instance->instancet->check_reset(instance,
instance->reg_set)) == 1) {
@@ -2087,6 +2132,51 @@ megasas_deplete_reply_queue(struct megas
return IRQ_NONE;
}

+ instance->mfiStatus = mfiStatus;
+
+ if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
+ fw_state = instance->instancet->read_fw_status_reg(
+ instance->reg_set) & MFI_STATE_MASK;
+
+ if (fw_state != MFI_STATE_FAULT) {
+ printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
+ fw_state);
+ }
+
+ if ((fw_state == MFI_STATE_FAULT) &&
+ (instance->disableOnlineCtrlReset == 0)) {
+ printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
+
+ if ((instance->pdev->device ==
+ PCI_DEVICE_ID_LSI_SAS1064R) ||
+ (instance->pdev->device ==
+ PCI_DEVICE_ID_DELL_PERC5) ||
+ (instance->pdev->device ==
+ PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
+
+ *instance->consumer =
+ MEGASAS_ADPRESET_INPROG_SIGN;
+ }
+
+
+ instance->instancet->disable_intr(instance->reg_set);
+ instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
+ instance->issuepend_done = 0;
+
+ atomic_set(&instance->fw_outstanding, 0);
+ megasas_internal_reset_defer_cmds(instance);
+
+ printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
+ fw_state, instance->adprecovery);
+
+ return IRQ_HANDLED;
+
+ } else {
+ printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
+ fw_state, instance->disableOnlineCtrlReset);
+ }
+ }
+
tasklet_schedule(&instance->isr_tasklet);
return IRQ_HANDLED;
}
@@ -2095,8 +2185,21 @@ megasas_deplete_reply_queue(struct megas
*/
static irqreturn_t megasas_isr(int irq, void *devp)
{
- return megasas_deplete_reply_queue((struct megasas_instance *)devp,
- DID_OK);
+ struct megasas_instance *instance;
+ unsigned long flags;
+ irqreturn_t rc;
+
+ if (atomic_read(
+ &(((struct megasas_instance *)devp)->fw_reset_no_pci_access)))
+ return IRQ_HANDLED;
+
+ instance = (struct megasas_instance *)devp;
+
+ spin_lock_irqsave(&instance->hba_lock, flags);
+ rc = megasas_deplete_reply_queue(instance, DID_OK);
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+
+ return rc;
}

/**
@@ -4094,6 +4197,9 @@ static int megasas_mgmt_ioctl_fw(struct
struct megasas_iocpacket *ioc;
struct megasas_instance *instance;
int error;
+ int i;
+ unsigned long flags;
+ u32 wait_time = MEGASAS_RESET_WAIT_TIME;

ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc)
@@ -4129,6 +4235,34 @@ static int megasas_mgmt_ioctl_fw(struct
goto out_kfree_ioc;
}

+ for (i = 0; i < wait_time; i++) {
+
+ spin_lock_irqsave(&instance->hba_lock, flags);
+ if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+ break;
+ }
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+
+ if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
+ printk(KERN_NOTICE "megasas: waiting"
+ "for controller reset to finish\n");
+ }
+
+ msleep(1000);
+ }
+
+ spin_lock_irqsave(&instance->hba_lock, flags);
+ if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+
+ printk(KERN_ERR "megaraid_sas: timed out while"
+ "waiting for HBA to recover\n");
+ error = -ENODEV;
+ goto out_kfree_ioc;
+ }
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+
error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
up(&instance->ioctl_sem);

@@ -4142,6 +4276,9 @@ static int megasas_mgmt_ioctl_aen(struct
struct megasas_instance *instance;
struct megasas_aen aen;
int error;
+ int i;
+ unsigned long flags;
+ u32 wait_time = MEGASAS_RESET_WAIT_TIME;

if (file->private_data != file) {
printk(KERN_DEBUG "megasas: fasync_helper was not "
@@ -4165,6 +4302,34 @@ static int megasas_mgmt_ioctl_aen(struct
return -ENODEV;
}

+ for (i = 0; i < wait_time; i++) {
+
+ spin_lock_irqsave(&instance->hba_lock, flags);
+ if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
+ spin_unlock_irqrestore(&instance->hba_lock,
+ flags);
+ break;
+ }
+
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+
+ if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
+ printk(KERN_NOTICE "megasas: waiting for"
+ "controller reset to finish\n");
+ }
+
+ msleep(1000);
+ }
+
+ spin_lock_irqsave(&instance->hba_lock, flags);
+ if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+ printk(KERN_ERR "megaraid_sas: timed out while waiting"
+ "for HBA to recover.\n");
+ return -ENODEV;
+ }
+ spin_unlock_irqrestore(&instance->hba_lock, flags);
+
mutex_lock(&instance->aen_mutex);
error = megasas_register_aen(instance, aen.seq_num,
aen.class_locale_word);
diff -rupN old/drivers/scsi/megaraid/megaraid_sas.h new/drivers/scsi/megaraid/megaraid_sas.h
--- old/drivers/scsi/megaraid/megaraid_sas.h 2010-06-17 08:10:50.000000000 -0400
+++ new/drivers/scsi/megaraid/megaraid_sas.h 2010-06-17 08:25:39.000000000 -0400
@@ -414,8 +414,14 @@ struct megasas_ctrl_prop {
u8 abortCCOnError;
u8 loadBalanceMode;
u8 disableAutoDetectBackplane;
+
u8 snapVDSpace;

+ /*
+ * Add properties that can be controlled by
+ * a bit in the following structure.
+ */
+
struct {
u32 copyBackDisabled : 1;
u32 SMARTerEnabled : 1;
--
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