rhel5-ga.patch

最新的Megaraid SAS卡驱动源代码

diff -uprN base/megaraid_sas.c rhel5-ga/megaraid_sas.c
--- base/megaraid_sas.c	2007-10-13 20:49:29.000000000 -0700
+++ rhel5-ga/megaraid_sas.c	2007-10-13 21:18:22.000000000 -0700
@@ -876,6 +876,7 @@ megasas_queue_command(struct scsi_cmnd *
 	u32 frame_count;
 	struct megasas_cmd *cmd;
 	struct megasas_instance *instance;
+	unsigned long sec;
 
 	instance = (struct megasas_instance *)
 	    scmd->device->host->hostdata;
@@ -903,6 +904,22 @@ megasas_queue_command(struct scsi_cmnd *
 		goto out_done;
 	}
 
+	/* If FW is busy donot accept any more cmds */
+	if(instance->is_busy){
+		sec = (jiffies - instance->last_time) / HZ;
+		if(sec<10) 
+			return SCSI_MLQUEUE_HOST_BUSY;
+		else{
+			instance->is_busy=0;
+			instance->last_time=0;
+		}
+	}
+
+	if(scmd->retries>1){
+		instance->is_busy=1;
+		instance->last_time=jiffies;
+	}
+
 	cmd = megasas_get_cmd(instance);
 	if (!cmd)
 		return SCSI_MLQUEUE_HOST_BUSY;
@@ -919,7 +936,6 @@ megasas_queue_command(struct scsi_cmnd *
 		goto out_return_cmd;
 
 	cmd->scmd = scmd;
-	scmd->SCp.ptr = (char *)cmd;
 
 	/*
 	 * Issue the command to the FW
@@ -953,7 +969,7 @@ static int megasas_slave_configure(struc
 	 * The RAID firmware may require extended timeouts.
 	 */
 	if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
-		sdev->timeout = MEGASAS_DEFAULT_CMD_TIMEOUT * HZ;
+		sdev->timeout = 90 * HZ;
 	return 0;
 }
 
@@ -1080,39 +1096,6 @@ static int megasas_generic_reset(struct 
 	return ret_val;
 }
 
- /**
- * megasas_reset_timer - quiesce the adapter if required
- * @scmd:		scsi cmnd
- *
- * Sets the FW busy flag and reduces the host->can_queue if the
- * cmd has not been completed within the timeout period.
- */
-static enum
-scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
-{
-	struct megasas_cmd *cmd = (struct megasas_cmd *)scmd->SCp.ptr;
-	struct megasas_instance *instance;
-	unsigned long flags;
-
-	if (time_after(jiffies, scmd->jiffies_at_alloc +
-				(MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
-		return EH_NOT_HANDLED;
-	}
-
-	instance = cmd->instance;
-	if (!(instance->flag & MEGASAS_FW_BUSY)) {
-		/* FW is busy, throttle IO */
-		spin_lock_irqsave(instance->host->host_lock, flags);
-
-		instance->host->can_queue = 16;
-		instance->last_time = jiffies;
-		instance->flag |= MEGASAS_FW_BUSY;
-
-		spin_unlock_irqrestore(instance->host->host_lock, flags);
-	}
-	return EH_RESET_TIMER;
-}
-
 /**
  * megasas_reset_device -	Device reset handler entry point
  */
@@ -1261,7 +1244,6 @@ static struct scsi_host_template megasas
 	.eh_device_reset_handler = megasas_reset_device,
 	.eh_bus_reset_handler = megasas_reset_bus_host,
 	.eh_host_reset_handler = megasas_reset_bus_host,
-	.eh_timed_out = megasas_reset_timer,
 	.bios_param = megasas_bios_param,
 	.use_clustering = ENABLE_CLUSTERING,
 };
@@ -1364,10 +1346,7 @@ megasas_complete_cmd(struct megasas_inst
 {
 	int exception = 0;
 	struct megasas_header *hdr = &cmd->frame->hdr;
-	unsigned long flags;
-
-	if (cmd->scmd)
-		cmd->scmd->SCp.ptr = NULL;
+	int outstanding;
 
 	switch (hdr->cmd) {
 
@@ -1477,22 +1456,12 @@ megasas_complete_cmd(struct megasas_inst
 		       hdr->cmd);
 		break;
 	}
-	
-	/*
-	 * 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);
+	if(instance->is_busy){
+		outstanding = atomic_read(&instance->fw_outstanding);
+		if(outstanding<17)
+			instance->is_busy=0;
 	}
-	
 }
 
 /**
@@ -1525,7 +1494,7 @@ out_done:
 /**
  * megasas_isr - isr entry point
  */
-static irqreturn_t megasas_isr(int irq, void *devp)
+static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
 {
 	return megasas_deplete_reply_queue((struct megasas_instance *)devp,
 					   DID_OK);
@@ -2635,8 +2604,8 @@ megasas_probe_one(struct pci_dev *pdev, 
 	instance->init_id = MEGASAS_DEFAULT_INIT_ID;
 
 	megasas_dbg_lvl = 0;
-	instance->flag = 0;
-	instance->last_time = 0;
+	instance->is_busy=0;
+	instance->last_time=0;
 
 	/*
 	 * Initialize MFI Firmware
@@ -3167,7 +3136,7 @@ megasas_mgmt_fw_ioctl(struct megasas_ins
 		 * sense buffer address
 		 */
 		sense_buff = (unsigned long *) ((unsigned long)ioc->frame.raw +
-					ioc->sense_off);
+                                     ioc->sense_off);
 		sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
 					ioc->sense_off);
 #if defined(__ia64__)
diff -uprN base/megaraid_sas.h rhel5-ga/megaraid_sas.h
--- base/megaraid_sas.h	2007-10-13 20:37:32.000000000 -0700
+++ rhel5-ga/megaraid_sas.h	2007-10-13 21:18:23.000000000 -0700
@@ -556,8 +556,6 @@ struct megasas_ctrl_info {
 
 #define MEGASAS_IOCTL_CMD			0
 
-#define MEGASAS_DEFAULT_CMD_TIMEOUT		90
-
 /*
  * FW reports the maximum of number of commands that it can accept (maximum
  * commands that can be outstanding) at any time. The driver must report a
@@ -1112,7 +1110,7 @@ struct megasas_instance {
 	struct megasas_instance_template *instancet;
 	struct tasklet_struct isr_tasklet;
 
-	u8 flag;
+	u8 is_busy;
 	unsigned long last_time;
 };