sles9-sp1.patch

最新的Megaraid SAS卡驱动源代码

diff -uprN base/megaraid_sas.c sles9-sp1/megaraid_sas.c
--- base/megaraid_sas.c	2007-10-13 20:49:29.000000000 -0700
+++ sles9-sp1/megaraid_sas.c	2007-10-13 20:45:56.000000000 -0700
@@ -28,6 +28,7 @@
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/list.h>
+#include <linux/version.h>
 #include <linux/moduleparam.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
@@ -36,9 +37,9 @@
 #include <linux/uio.h>
 #include <asm/uaccess.h>
 #include <linux/fs.h>
-#include <linux/compat.h>
+#include <linux/ioctl32.h>
 #include <linux/blkdev.h>
-#include <linux/mutex.h>
+#include <linux/compat.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -78,6 +79,7 @@ module_param_named(cmd_per_lun, cmd_per_
 MODULE_PARM_DESC(cmd_per_lun,
 	"Maximum number of commands per logical unit (default=128)");
 
+
 MODULE_LICENSE("GPL");
 MODULE_VERSION(MEGASAS_VERSION);
 MODULE_AUTHOR("[e-mail]");
@@ -104,20 +106,40 @@ MODULE_DEVICE_TABLE(pci, megasas_pci_tab
 static int megasas_mgmt_majorno;
 static struct megasas_mgmt_info megasas_mgmt_info;
 static struct fasync_struct *megasas_async_queue;
-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);
+
+static DECLARE_MUTEX(megasas_async_queue_mutex);
+
+/**
+ * msleep - sleep for a number of milliseconds
+ * @msecs: number of milliseconds to sleep
+ *
+ * Issues schedule_timeout call for the specified number
+ * of milliseconds.
+ */
+
+static inline unsigned long msecs_to_jiffies(unsigned long msecs)
+{
+	return ((HZ * msecs + 999) / 1000);
+}
+
+static void msleep(unsigned long msecs)
+{
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(msecs_to_jiffies(msecs) + 1);
+}
+ 
+
 /**
  * megasas_get_cmd -	Get a command from the free pool
  * @instance:		Adapter soft state
  *
  * Returns a free command from the pool
  */
-static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
+static inline struct megasas_cmd *megasas_get_cmd(struct megasas_instance
 						  *instance)
 {
 	unsigned long flags;
@@ -181,7 +203,7 @@ megasas_enable_intr_xscale(struct megasa
 static inline void
 megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs)
 {
-	u32 mask = 0x1f;
+	u32 mask = 0x1f; 
 	writel(mask, &regs->outbound_intr_mask);
 	/* Dummy readl to force pci flush */
 	readl(&regs->outbound_intr_mask);
@@ -196,6 +218,7 @@ megasas_read_fw_status_reg_xscale(struct
 {
 	return readl(&(regs)->outbound_msg_0);
 }
+
 /**
  * megasas_clear_interrupt_xscale -	Check & clear interrupt
  * @regs:				MFI register set
@@ -275,7 +298,7 @@ megasas_enable_intr_ppc(struct megasas_r
 static inline void
 megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs)
 {
-	u32 mask = 0xFFFFFFFF;
+	u32 mask = 0xFFFFFFFF; 
 	writel(mask, &regs->outbound_intr_mask);
 	/* Dummy readl to force pci flush */
 	readl(&regs->outbound_intr_mask);
@@ -396,8 +419,7 @@ megasas_issue_blocked_cmd(struct megasas
 
 	instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
 
-	wait_event_timeout(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA),
-		MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ);
+	wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA));
 
 	return 0;
 }
@@ -444,8 +466,7 @@ megasas_issue_blocked_abort_cmd(struct m
 	/*
 	 * Wait for this cmd to complete
 	 */
-	wait_event_timeout(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF),
-		MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ);
+	wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF));
 
 	megasas_return_cmd(instance, cmd);
 	return 0;
@@ -460,7 +481,7 @@ megasas_issue_blocked_abort_cmd(struct m
  * If successful, this function returns the number of SG elements. Otherwise,
  * it returnes -1.
  */
-static int
+static inline int
 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
 		   union megasas_sgl *mfi_sgl)
 {
@@ -508,7 +529,7 @@ megasas_make_sgl32(struct megasas_instan
  * If successful, this function returns the number of SG elements. Otherwise,
  * it returnes -1.
  */
-static int
+static inline int
 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
 		   union megasas_sgl *mfi_sgl)
 {
@@ -549,7 +570,7 @@ megasas_make_sgl64(struct megasas_instan
 }
 
  /**
- * megasas_get_frame_count - Computes the number of frames
+ * megasas_get_frame_count - Computes the number of frames 
  * @sge_count		: number of sg elements
  *
  * Returns the number of frames required for numnber of sge's (sge_count)
@@ -587,7 +608,7 @@ static u32 megasas_get_frame_count(u8 sg
 		frame_count = 8;
 	return frame_count;
 }
-
+		
 /**
  * megasas_build_dcdb -	Prepares a direct cdb (DCDB) command
  * @instance:		Adapter soft state
@@ -597,7 +618,7 @@ static u32 megasas_get_frame_count(u8 sg
  * This function prepares CDB commands. These are typcially pass-through
  * commands to the devices.
  */
-static int
+static inline int
 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
 		   struct megasas_cmd *cmd)
 {
@@ -667,7 +688,7 @@ megasas_build_dcdb(struct megasas_instan
  *
  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
  */
-static int
+static inline int
 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
 		   struct megasas_cmd *cmd)
 {
@@ -803,7 +824,7 @@ static inline int megasas_is_ldio(struct
 }
 
  /**
- * megasas_dump_pending_frames -	Dumps the frame address of all pending cmds
+ * megasas_dump_pending_frames -	Dumps the frame address of all pending cmds 
  *                              	in FW
  * @instance:				Adapter soft state
  */
@@ -824,13 +845,15 @@ megasas_dump_pending_frames(struct megas
 		printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
 	else
 		printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
-
+		
 	printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
 	for (i = 0; i < max_cmd; i++) {
 		cmd = instance->cmd_list[i];
 		if(!cmd->scmd)
 			continue;
+
 		printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
+		
 		if (megasas_is_ldio(cmd->scmd)){
 			ldio = (struct megasas_io_frame *)cmd->frame;
 			mfi_sgl = &ldio->sgl;
@@ -876,17 +899,17 @@ 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;
+	scmd->scsi_done = done;
+	scmd->result = 0;
 
 	/* Don't process if we have already declared adapter dead */
 	if (instance->hw_crit_error)
 		return SCSI_MLQUEUE_HOST_BUSY;
 
-	scmd->scsi_done = done;
-	scmd->result = 0;
-
 	if (MEGASAS_IS_LOGICAL(scmd) &&
 	    (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
 		scmd->result = DID_BAD_TARGET << 16;
@@ -894,13 +917,24 @@ megasas_queue_command(struct scsi_cmnd *
 	}
 
 	switch (scmd->cmnd[0]) {
-	case SYNCHRONIZE_CACHE:
-		/*
-		 * FW takes care of flush cache on its own
-		 * No need to send it down
-		 */
-		scmd->result = DID_OK << 16;
-		goto out_done;
+		case SYNCHRONIZE_CACHE:
+			scmd->result = DID_OK << 16;
+			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);
@@ -920,6 +954,7 @@ megasas_queue_command(struct scsi_cmnd *
 
 	cmd->scmd = scmd;
 	scmd->SCp.ptr = (char *)cmd;
+	scmd->SCp.sent_command = jiffies;
 
 	/*
 	 * Issue the command to the FW
@@ -937,40 +972,20 @@ megasas_queue_command(struct scsi_cmnd *
 	return 0;
 }
 
-static int megasas_slave_configure(struct scsi_device *sdev)
-{
-	/*
-	 * Don't export physical disk devices to the disk driver.
-	 *
-	 * FIXME: Currently we don't export them to the midlayer at all.
-	 * 	  That will be fixed once LSI engineers have audited the
-	 * 	  firmware for possible issues.
-	 */
-	if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
-		return -ENXIO;
-
-	/*
-	 * The RAID firmware may require extended timeouts.
-	 */
-	if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
-		sdev->timeout = MEGASAS_DEFAULT_CMD_TIMEOUT * HZ;
-	return 0;
-}
-
 /**
  * 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)
+void megasas_complete_cmd_dpc(unsigned long instance_addr)
 {
 	u32 producer;
 	u32 consumer;
 	u32 context;
+	unsigned long flags;
 	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)
@@ -978,9 +993,9 @@ static void megasas_complete_cmd_dpc(uns
 
 	spin_lock_irqsave(&instance->completion_lock, flags);
 
-	producer = *instance->producer;
-	consumer = *instance->consumer;
-
+ 	producer = *instance->producer;
+ 	consumer = *instance->consumer;
+ 
 	while (consumer != producer) {
 		context = instance->reply_queue[consumer];
 
@@ -1026,7 +1041,7 @@ static int megasas_wait_for_outstanding(
 			 * Call cmd completion routine. Cmd to be 
 			 * be completed directly without depending on isr.
 			 */
-			megasas_complete_cmd_dpc((unsigned long)instance);
+			megasas_complete_cmd_dpc(instance);
 		}
 
 		msleep(1000);
@@ -1062,8 +1077,9 @@ static int megasas_generic_reset(struct 
 
 	instance = (struct megasas_instance *)scmd->device->host->hostdata;
 
-	scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x retries=%x\n",
-		 scmd->serial_number, scmd->cmnd[0], scmd->retries);
+	printk(KERN_NOTICE "megasas: RESET -%ld cmd=%x <c=%d t=%d l=%d> retries=%x\n",
+	       scmd->serial_number, scmd->cmnd[0], scmd->device->channel,
+	       scmd->device->id, scmd->device->lun, scmd->retries);
 
 	if (instance->hw_crit_error) {
 		printk(KERN_ERR "megasas: cannot recover from previous reset "
@@ -1071,46 +1087,17 @@ static int megasas_generic_reset(struct 
 		return FAILED;
 	}
 
+	spin_unlock(scmd->device->host->host_lock);
+
 	ret_val = megasas_wait_for_outstanding(instance);
 	if (ret_val == SUCCESS)
 		printk(KERN_NOTICE "megasas: reset successful \n");
 	else
 		printk(KERN_ERR "megasas: failed to do reset\n");
 
-	return ret_val;
-}
+	spin_lock(scmd->device->host->host_lock);
 
- /**
- * 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;
+	return ret_val;
 }
 
 /**
@@ -1213,6 +1200,16 @@ megasas_service_aen(struct megasas_insta
 	megasas_return_cmd(instance, cmd);
 }
 
+static int megasas_slave_configure(struct scsi_device *sdev)
+{
+	/*
+	* The RAID firmware may require extended timeouts
+	*/
+	if(sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
+		sdev->timeout = 90 * HZ ;
+	return 0;
+}
+
 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
 {
 	int i;
@@ -1255,13 +1252,12 @@ static struct scsi_host_template megasas
 	.module = THIS_MODULE,
 	.name = "LSI Logic SAS based MegaRAID driver",
 	.proc_name = "megaraid_sas",
-	.slave_configure = megasas_slave_configure,
 	.slave_alloc = megasas_slave_alloc,
+	.slave_configure = megasas_slave_configure,
 	.queuecommand = megasas_queue_command,
 	.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,
 };
@@ -1314,7 +1310,7 @@ megasas_complete_abort(struct megasas_in
  * @instance:			Adapter soft state
  * @cmd:			Completed command
  */
-static void
+static inline void
 megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
 {
 	dma_addr_t buf_h;
@@ -1358,16 +1354,15 @@ megasas_unmap_sgbuf(struct megasas_insta
  * 				an alternate status (as in the case of aborted
  * 				commands)
  */
-static void
+static inline void
 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
 		     u8 alt_status)
 {
 	int exception = 0;
 	struct megasas_header *hdr = &cmd->frame->hdr;
-	unsigned long flags;
-
+	int outstanding;
 	if (cmd->scmd)