diff options
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.c | 122 | ||||
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.h | 2 |
2 files changed, 70 insertions, 54 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index a58ad61..08c3d43 100644 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ b/drivers/scsi/megaraid/megaraid_sas.c @@ -77,6 +77,10 @@ static DEFINE_MUTEX(megasas_async_queue_mutex); static u32 megasas_dbg_lvl; +static void +megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, + u8 alt_status); + /** * megasas_get_cmd - Get a command from the free pool * @instance: Adapter soft state @@ -887,6 +891,64 @@ static int megasas_slave_configure(struct scsi_device *sdev) } /** + * megasas_complete_cmd_dpc - Returns FW's controller structure + * @instance_addr: Address of adapter soft state + * + * Tasklet to complete cmds + */ +static void megasas_complete_cmd_dpc(unsigned long instance_addr) +{ + u32 producer; + u32 consumer; + u32 context; + struct megasas_cmd *cmd; + struct megasas_instance *instance = + (struct megasas_instance *)instance_addr; + unsigned long flags; + + /* If we have already declared adapter dead, donot complete cmds */ + if (instance->hw_crit_error) + return; + + spin_lock_irqsave(&instance->completion_lock, flags); + + producer = *instance->producer; + consumer = *instance->consumer; + + while (consumer != producer) { + context = instance->reply_queue[consumer]; + + cmd = instance->cmd_list[context]; + + megasas_complete_cmd(instance, cmd, DID_OK); + + consumer++; + if (consumer == (instance->max_fw_cmds + 1)) { + consumer = 0; + } + } + + *instance->consumer = producer; + + spin_unlock_irqrestore(&instance->completion_lock, flags); + + /* + * Check if we can restore can_queue + */ + if (instance->flag & MEGASAS_FW_BUSY + && time_after(jiffies, instance->last_time + 5 * HZ) + && atomic_read(&instance->fw_outstanding) < 17) { + + spin_lock_irqsave(instance->host->host_lock, flags); + instance->flag &= ~MEGASAS_FW_BUSY; + instance->host->can_queue = + instance->max_fw_cmds - MEGASAS_INT_CMDS; + + spin_unlock_irqrestore(instance->host->host_lock, flags); + } +} + +/** * megasas_wait_for_outstanding - Wait for all outstanding cmds * @instance: Adapter soft state * @@ -909,6 +971,11 @@ static int megasas_wait_for_outstanding(struct megasas_instance *instance) if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { printk(KERN_NOTICE "megasas: [%2d]waiting for %d " "commands to complete\n",i,outstanding); + /* + * Call cmd completion routine. Cmd to be + * be completed directly without depending on isr. + */ + megasas_complete_cmd_dpc((unsigned long)instance); } msleep(1000); @@ -1750,60 +1817,6 @@ megasas_get_ctrl_info(struct megasas_instance *instance, } /** - * megasas_complete_cmd_dpc - Returns FW's controller structure - * @instance_addr: Address of adapter soft state - * - * Tasklet to complete cmds - */ -static void megasas_complete_cmd_dpc(unsigned long instance_addr) -{ - u32 producer; - u32 consumer; - u32 context; - struct megasas_cmd *cmd; - struct megasas_instance *instance = (struct megasas_instance *)instance_addr; - unsigned long flags; - - /* If we have already declared adapter dead, donot complete cmds */ - if (instance->hw_crit_error) - return; - - producer = *instance->producer; - consumer = *instance->consumer; - - while (consumer != producer) { - context = instance->reply_queue[consumer]; - - cmd = instance->cmd_list[context]; - - megasas_complete_cmd(instance, cmd, DID_OK); - - consumer++; - if (consumer == (instance->max_fw_cmds + 1)) { - consumer = 0; - } - } - - *instance->consumer = producer; - - /* - * Check if we can restore can_queue - */ - if (instance->flag & MEGASAS_FW_BUSY - && time_after(jiffies, instance->last_time + 5 * HZ) - && atomic_read(&instance->fw_outstanding) < 17) { - - spin_lock_irqsave(instance->host->host_lock, flags); - instance->flag &= ~MEGASAS_FW_BUSY; - instance->host->can_queue = - instance->max_fw_cmds - MEGASAS_INT_CMDS; - - spin_unlock_irqrestore(instance->host->host_lock, flags); - } - -} - -/** * megasas_issue_init_mfi - Initializes the FW * @instance: Adapter soft state * @@ -2395,6 +2408,7 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) init_waitqueue_head(&instance->abort_cmd_wait_q); spin_lock_init(&instance->cmd_pool_lock); + spin_lock_init(&instance->completion_lock); mutex_init(&instance->aen_mutex); sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 9739023..c3575a3 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -1084,6 +1084,8 @@ struct megasas_instance { struct megasas_cmd **cmd_list; struct list_head cmd_pool; spinlock_t cmd_pool_lock; + /* used to synch producer, consumer ptrs in dpc */ + spinlock_t completion_lock; struct dma_pool *frame_dma_pool; struct dma_pool *sense_dma_pool; |