scsi: arcmsr: Configure the default command timeout value

Allow configuring the default command timeout value for devices attached to
arcmsr controllers.

Link: https://lore.kernel.org/r/27c0cda7fd103f05021adaf67490e9298ed5cc3f.camel@areca.com.tw
Signed-off-by: ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/arcmsr/arcmsr.h

@@ -83,6 +83,7 @@ struct device_attribute;
 #define PCI_DEVICE_ID_ARECA_1886	0x188A
 #define	ARCMSR_HOURS			(1000 * 60 * 60 * 4)
 #define	ARCMSR_MINUTES			(1000 * 60 * 60)
+#define ARCMSR_DEFAULT_TIMEOUT		90
 /*
 **********************************************************************************
 **

drivers/scsi/arcmsr/arcmsr_hba.c

@@ -99,6 +99,10 @@ static int set_date_time = 0;
 module_param(set_date_time, int, S_IRUGO);
 MODULE_PARM_DESC(set_date_time, " send date, time to iop(0 ~ 1), set_date_time=1(enable), default(=0) is disable");
 
+static int cmd_timeout = ARCMSR_DEFAULT_TIMEOUT;
+module_param(cmd_timeout, int, S_IRUGO);
+MODULE_PARM_DESC(cmd_timeout, " scsi cmd timeout(0 ~ 120 sec.), default is 90");
+
 #define	ARCMSR_SLEEPTIME	10
 #define	ARCMSR_RETRYCOUNT	12
 
@@ -140,6 +144,7 @@ static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
 static void arcmsr_free_irq(struct pci_dev *, struct AdapterControlBlock *);
 static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb);
 static void arcmsr_set_iop_datetime(struct timer_list *);
+static int arcmsr_slave_config(struct scsi_device *sdev);
 static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev, int queue_depth)
 {
 	if (queue_depth > ARCMSR_MAX_CMD_PERLUN)
@@ -155,6 +160,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = {
 	.eh_abort_handler	= arcmsr_abort,
 	.eh_bus_reset_handler	= arcmsr_bus_reset,
 	.bios_param		= arcmsr_bios_param,
+	.slave_configure	= arcmsr_slave_config,
 	.change_queue_depth	= arcmsr_adjust_disk_queue_depth,
 	.can_queue		= ARCMSR_DEFAULT_OUTSTANDING_CMD,
 	.this_id		= ARCMSR_SCSI_INITIATOR_ID,
@@ -3256,6 +3262,16 @@ static int arcmsr_queue_command_lck(struct scsi_cmnd *cmd,
 
 static DEF_SCSI_QCMD(arcmsr_queue_command)
 
+static int arcmsr_slave_config(struct scsi_device *sdev)
+{
+	unsigned int	dev_timeout;
+
+	dev_timeout = sdev->request_queue->rq_timeout;
+	if ((cmd_timeout > 0) && ((cmd_timeout * HZ) > dev_timeout))
+		blk_queue_rq_timeout(sdev->request_queue, cmd_timeout * HZ);
+	return 0;
+}
+
 static void arcmsr_get_adapter_config(struct AdapterControlBlock *pACB, uint32_t *rwbuffer)
 {
 	int count;