[PATCH 7/13] scsi: arcmsr: add driver option cmd_per_lun to set host->cmd_per_lun value by user

[Ching Huang]

From: Ching Huang 

add driver option cmd_per_lun to set host->cmd_per_lun value by user

Signed-off-by: Ching Huang 
---

diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
--- a/drivers/scsi/arcmsr/arcmsr.h  2017-08-04 17:40:54.0 +0800
+++ b/drivers/scsi/arcmsr/arcmsr.h  2017-08-04 18:12:54.0 +0800
@@ -61,7 +61,9 @@ struct device_attribute;
 #define ARCMSR_MAX_XFER_SECTORS_C  
304
 #define ARCMSR_MAX_TARGETID
17
 #define ARCMSR_MAX_TARGETLUN   
8
-#define ARCMSR_MAX_CMD_PERLUN   
ARCMSR_MAX_OUTSTANDING_CMD
+#define ARCMSR_MAX_CMD_PERLUN  128
+#define ARCMSR_DEFAULT_CMD_PERLUN  32
+#define ARCMSR_MIN_CMD_PERLUN  1
 #define ARCMSR_MAX_QBUFFER 
4096
 #define ARCMSR_DEFAULT_SG_ENTRIES  
38
 #define ARCMSR_MAX_HBB_POSTQUEUE   
264
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
--- a/drivers/scsi/arcmsr/arcmsr_hba.c  2017-11-08 18:52:04.0 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c  2017-11-08 18:52:48.0 +0800
@@ -79,6 +79,10 @@ static int host_can_queue = ARCMSR_DEFAU
 module_param(host_can_queue, int, S_IRUGO);
 MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 
128");
 
+static int cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN;
+module_param(cmd_per_lun, int, S_IRUGO);
+MODULE_PARM_DESC(cmd_per_lun, " device queue depth(1 ~ 128), default is 32");
+
 #defineARCMSR_SLEEPTIME10
 #defineARCMSR_RETRYCOUNT   12
 
@@ -141,7 +145,7 @@ static struct scsi_host_template arcmsr_
.this_id= ARCMSR_SCSI_INITIATOR_ID,
.sg_tablesize   = ARCMSR_DEFAULT_SG_ENTRIES, 
.max_sectors= ARCMSR_MAX_XFER_SECTORS_C, 
-   .cmd_per_lun= ARCMSR_MAX_CMD_PERLUN,
+   .cmd_per_lun= ARCMSR_DEFAULT_CMD_PERLUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs= arcmsr_host_attrs,
.no_write_same  = 1,
@@ -884,7 +888,9 @@ static int arcmsr_probe(struct pci_dev *
if ((host_can_queue < ARCMSR_MIN_OUTSTANDING_CMD) || (host_can_queue > 
ARCMSR_MAX_OUTSTANDING_CMD))
host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD;
host->can_queue = host_can_queue;   /* max simultaneous cmds */ 

-   host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;  
+   if ((cmd_per_lun < ARCMSR_MIN_CMD_PERLUN) || (cmd_per_lun > 
ARCMSR_MAX_CMD_PERLUN))
+   cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN;
+   host->cmd_per_lun = cmd_per_lun;
host->this_id = ARCMSR_SCSI_INITIATOR_ID;
host->unique_id = (bus << 8) | dev_fun;
pci_set_drvdata(pdev, host);

[PATCH 7/13] scsi: arcmsr: add driver option cmd_per_lun to set host->cmd_per_lun value by user

[Ching Huang]

From: Ching Huang 

add driver option cmd_per_lun to set host->cmd_per_lun value by user

Signed-off-by: Ching Huang 
---

diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
--- a/drivers/scsi/arcmsr/arcmsr.h  2017-08-04 17:40:54.0 +0800
+++ b/drivers/scsi/arcmsr/arcmsr.h  2017-08-04 18:12:54.0 +0800
@@ -61,7 +61,9 @@ struct device_attribute;
 #define ARCMSR_MAX_XFER_SECTORS_C  
304
 #define ARCMSR_MAX_TARGETID
17
 #define ARCMSR_MAX_TARGETLUN   
8
-#define ARCMSR_MAX_CMD_PERLUN   
ARCMSR_MAX_OUTSTANDING_CMD
+#define ARCMSR_MAX_CMD_PERLUN  128
+#define ARCMSR_DEFAULT_CMD_PERLUN  32
+#define ARCMSR_MIN_CMD_PERLUN  1
 #define ARCMSR_MAX_QBUFFER 
4096
 #define ARCMSR_DEFAULT_SG_ENTRIES  
38
 #define ARCMSR_MAX_HBB_POSTQUEUE   
264
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
--- a/drivers/scsi/arcmsr/arcmsr_hba.c  2017-11-08 18:52:04.0 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c  2017-11-08 18:52:48.0 +0800
@@ -79,6 +79,10 @@ static int host_can_queue = ARCMSR_DEFAU
 module_param(host_can_queue, int, S_IRUGO);
 MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 
128");
 
+static int cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN;
+module_param(cmd_per_lun, int, S_IRUGO);
+MODULE_PARM_DESC(cmd_per_lun, " device queue depth(1 ~ 128), default is 32");
+
 #defineARCMSR_SLEEPTIME10
 #defineARCMSR_RETRYCOUNT   12
 
@@ -141,7 +145,7 @@ static struct scsi_host_template arcmsr_
.this_id= ARCMSR_SCSI_INITIATOR_ID,
.sg_tablesize   = ARCMSR_DEFAULT_SG_ENTRIES, 
.max_sectors= ARCMSR_MAX_XFER_SECTORS_C, 
-   .cmd_per_lun= ARCMSR_MAX_CMD_PERLUN,
+   .cmd_per_lun= ARCMSR_DEFAULT_CMD_PERLUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs= arcmsr_host_attrs,
.no_write_same  = 1,
@@ -884,7 +888,9 @@ static int arcmsr_probe(struct pci_dev *
if ((host_can_queue < ARCMSR_MIN_OUTSTANDING_CMD) || (host_can_queue > 
ARCMSR_MAX_OUTSTANDING_CMD))
host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD;
host->can_queue = host_can_queue;   /* max simultaneous cmds */ 

-   host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;  
+   if ((cmd_per_lun < ARCMSR_MIN_CMD_PERLUN) || (cmd_per_lun > 
ARCMSR_MAX_CMD_PERLUN))
+   cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN;
+   host->cmd_per_lun = cmd_per_lun;
host->this_id = ARCMSR_SCSI_INITIATOR_ID;
host->unique_id = (bus << 8) | dev_fun;
pci_set_drvdata(pdev, host);