[PATCH] aacraid reset handler

Adds a reset handler to the aacraid template

drivers/scsi/aacraid/aacraid.h

@@ -512,6 +512,7 @@ struct adapter_ops
 	void (*adapter_enable_int)(struct aac_dev *dev, u32 event);
 	void (*adapter_disable_int)(struct aac_dev *dev, u32 event);
 	int  (*adapter_sync_cmd)(struct aac_dev *dev, u32 command, u32 p1, u32 *status);
+	int  (*adapter_check_health)(struct aac_dev *dev);
 };
 
 /*
@@ -942,6 +943,8 @@ struct aac_dev
 #define aac_adapter_disable_int(dev, event) \
 	dev->a_ops.adapter_disable_int(dev, event)
 
+#define aac_adapter_check_health(dev) \
+	(dev)->a_ops.adapter_check_health(dev)
 
 
 #define FIB_CONTEXT_FLAG_TIMED_OUT		(0x00000001)

drivers/scsi/aacraid/linit.c

@@ -49,6 +49,7 @@
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsicam.h>
+#include <scsi/scsi_eh.h>
 
 #include "aacraid.h"
 
@@ -339,6 +340,51 @@ static int aac_eh_abort(struct scsi_cmnd *cmd)
 	return FAILED;
 }
 
+/*
+ *	aac_eh_reset	- Reset command handling
+ *	@scsi_cmd:	SCSI command block causing the reset
+ *
+ */
+static int aac_eh_reset(struct scsi_cmnd* cmd)
+{
+	struct scsi_device * dev = cmd->device;
+	struct Scsi_Host * host = dev->host;
+	struct scsi_cmnd * command;
+	int count;
+	unsigned long flags;
+
+	printk(KERN_ERR "%s: Host adapter reset request. SCSI hang ?\n", 
+					AAC_DRIVERNAME);
+
+
+	if (aac_adapter_check_health((struct aac_dev *)host->hostdata)) {
+		printk(KERN_ERR "%s: Host adapter appears dead\n", 
+				AAC_DRIVERNAME);
+		return -ENODEV;
+	}
+	/*
+	 * Wait for all commands to complete to this specific
+	 * target (block maximum 60 seconds).
+	 */
+	for (count = 60; count; --count) {
+		__shost_for_each_device(dev, host) {
+			spin_lock_irqsave(&dev->list_lock, flags);
+			list_for_each_entry(command, &dev->cmd_list, list) {
+				if (command->serial_number) {
+					spin_unlock_irqrestore(&dev->list_lock, flags);
+					return SUCCESS;
+				}
+			}
+			spin_unlock_irqrestore(&dev->list_lock, flags);
+		}
+		spin_unlock_irq(host->host_lock);
+		scsi_sleep(HZ);
+		spin_lock_irq(host->host_lock);
+	}
+	printk(KERN_ERR "%s: SCSI bus appears hung\n", AAC_DRIVERNAME);
+	return -ETIMEDOUT;
+}
+
 /**
  *	aac_cfg_open		-	open a configuration file
  *	@inode: inode being opened
@@ -397,6 +443,7 @@ static struct scsi_host_template aac_driver_template = {
 	.bios_param     		= aac_biosparm,	
 	.slave_configure		= aac_slave_configure,
 	.eh_abort_handler		= aac_eh_abort,
+	.eh_host_reset_handler		= aac_eh_reset,
 	.can_queue      		= AAC_NUM_IO_FIB,	
 	.this_id        		= 16,
 	.sg_tablesize   		= 16,

drivers/scsi/aacraid/rkt.c

@@ -324,6 +324,38 @@ static void aac_rkt_start_adapter(struct aac_dev *dev)
 	rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
 }
 
+/**
+ *	aac_rkt_check_health
+ *	@dev: device to check if healthy
+ *
+ *	Will attempt to determine if the specified adapter is alive and
+ *	capable of handling requests, returning 0 if alive.
+ */
+static int aac_rkt_check_health(struct aac_dev *dev)
+{
+	long status = rkt_readl(dev, IndexRegs.Mailbox[7]);
+
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (status & SELF_TEST_FAILED)
+		return -1;
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (status & KERNEL_PANIC)
+		return -2;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
+	 */
+	if (!(status & KERNEL_UP_AND_RUNNING))
+		return -3;
+	/*
+	 *	Everything is OK
+	 */
+	return 0;
+} /* aac_rkt_check_health */
+
 /**
  *	aac_rkt_init	-	initialize an i960 based AAC card
  *	@dev: device to configure

drivers/scsi/aacraid/rx.c

@@ -324,6 +324,38 @@ static void aac_rx_start_adapter(struct aac_dev *dev)
 	rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
 }
 
+/**
+ *	aac_rx_check_health
+ *	@dev: device to check if healthy
+ *
+ *	Will attempt to determine if the specified adapter is alive and
+ *	capable of handling requests, returning 0 if alive.
+ */
+static int aac_rx_check_health(struct aac_dev *dev)
+{
+	long status = rx_readl(dev, IndexRegs.Mailbox[7]);
+
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (status & SELF_TEST_FAILED)
+		return -1;
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (status & KERNEL_PANIC)
+		return -2;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
+	 */
+	if (!(status & KERNEL_UP_AND_RUNNING))
+		return -3;
+	/*
+	 *	Everything is OK
+	 */
+	return 0;
+} /* aac_rx_check_health */
+
 /**
  *	aac_rx_init	-	initialize an i960 based AAC card
  *	@dev: device to configure

drivers/scsi/aacraid/sa.c

@@ -299,6 +299,38 @@ static void aac_sa_start_adapter(struct aac_dev *dev)
 	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &ret);
 }
 
+/**
+ *	aac_sa_check_health
+ *	@dev: device to check if healthy
+ *
+ *	Will attempt to determine if the specified adapter is alive and
+ *	capable of handling requests, returning 0 if alive.
+ */
+static int aac_sa_check_health(struct aac_dev *dev)
+{
+	long status = sa_readl(dev, Mailbox7);
+
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (status & SELF_TEST_FAILED)
+		return -1;
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (status & KERNEL_PANIC)
+		return -2;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
+	 */
+	if (!(status & KERNEL_UP_AND_RUNNING))
+		return -3;
+	/*
+	 *	Everything is OK
+	 */
+	return 0;
+} /* aac_sa_check_health */
+
 /**
  *	aac_sa_init	-	initialize an ARM based AAC card
  *	@dev: device to configure