diff options
author | Yang, Bo <Bo.Yang@lsi.com> | 2010-10-12 09:18:50 -0400 |
---|---|---|
committer | James Bottomley <James.Bottomley@suse.de> | 2010-10-26 12:06:03 -0400 |
commit | 1fd106851698e9a858d20ab0e0f0afd5e9ec9332 (patch) | |
tree | 5e0086317a354a50f67bd50bc117a363f35b68e4 /drivers | |
parent | 837f5fe89c843422452ef5e1a7e3d20e9caa3268 (diff) |
[SCSI] megaraid_sas: Add input parameter for max_sectors
Driver add the input parameters support for max_sectors for megaraid
sas gen2 chip. Customer can set the max_sectors support to 1MB for
gen2 chip during the driver load.
Signed-off-by Bo Yang <bo.yang@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.c | 30 | ||||
-rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.h | 1 |
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index 09a455d4b6ed..41ffc205724f 100644 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ b/drivers/scsi/megaraid/megaraid_sas.c | |||
@@ -56,6 +56,15 @@ module_param_named(poll_mode_io, poll_mode_io, int, 0); | |||
56 | MODULE_PARM_DESC(poll_mode_io, | 56 | MODULE_PARM_DESC(poll_mode_io, |
57 | "Complete cmds from IO path, (default=0)"); | 57 | "Complete cmds from IO path, (default=0)"); |
58 | 58 | ||
59 | /* | ||
60 | * Number of sectors per IO command | ||
61 | * Will be set in megasas_init_mfi if user does not provide | ||
62 | */ | ||
63 | static unsigned int max_sectors; | ||
64 | module_param_named(max_sectors, max_sectors, int, 0); | ||
65 | MODULE_PARM_DESC(max_sectors, | ||
66 | "Maximum number of sectors per IO command"); | ||
67 | |||
59 | MODULE_LICENSE("GPL"); | 68 | MODULE_LICENSE("GPL"); |
60 | MODULE_VERSION(MEGASAS_VERSION); | 69 | MODULE_VERSION(MEGASAS_VERSION); |
61 | MODULE_AUTHOR("megaraidlinux@lsi.com"); | 70 | MODULE_AUTHOR("megaraidlinux@lsi.com"); |
@@ -3586,6 +3595,27 @@ static int megasas_io_attach(struct megasas_instance *instance) | |||
3586 | instance->max_fw_cmds - MEGASAS_INT_CMDS; | 3595 | instance->max_fw_cmds - MEGASAS_INT_CMDS; |
3587 | host->this_id = instance->init_id; | 3596 | host->this_id = instance->init_id; |
3588 | host->sg_tablesize = instance->max_num_sge; | 3597 | host->sg_tablesize = instance->max_num_sge; |
3598 | /* | ||
3599 | * Check if the module parameter value for max_sectors can be used | ||
3600 | */ | ||
3601 | if (max_sectors && max_sectors < instance->max_sectors_per_req) | ||
3602 | instance->max_sectors_per_req = max_sectors; | ||
3603 | else { | ||
3604 | if (max_sectors) { | ||
3605 | if (((instance->pdev->device == | ||
3606 | PCI_DEVICE_ID_LSI_SAS1078GEN2) || | ||
3607 | (instance->pdev->device == | ||
3608 | PCI_DEVICE_ID_LSI_SAS0079GEN2)) && | ||
3609 | (max_sectors <= MEGASAS_MAX_SECTORS)) { | ||
3610 | instance->max_sectors_per_req = max_sectors; | ||
3611 | } else { | ||
3612 | printk(KERN_INFO "megasas: max_sectors should be > 0" | ||
3613 | "and <= %d (or < 1MB for GEN2 controller)\n", | ||
3614 | instance->max_sectors_per_req); | ||
3615 | } | ||
3616 | } | ||
3617 | } | ||
3618 | |||
3589 | host->max_sectors = instance->max_sectors_per_req; | 3619 | host->max_sectors = instance->max_sectors_per_req; |
3590 | host->cmd_per_lun = 128; | 3620 | host->cmd_per_lun = 128; |
3591 | host->max_channel = MEGASAS_MAX_CHANNELS - 1; | 3621 | host->max_channel = MEGASAS_MAX_CHANNELS - 1; |
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 16a4f68a34b0..54d1a154b448 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h | |||
@@ -706,6 +706,7 @@ struct megasas_ctrl_info { | |||
706 | #define MEGASAS_MAX_LD_IDS (MEGASAS_MAX_LD_CHANNELS * \ | 706 | #define MEGASAS_MAX_LD_IDS (MEGASAS_MAX_LD_CHANNELS * \ |
707 | MEGASAS_MAX_DEV_PER_CHANNEL) | 707 | MEGASAS_MAX_DEV_PER_CHANNEL) |
708 | 708 | ||
709 | #define MEGASAS_MAX_SECTORS (2*1024) | ||
709 | #define MEGASAS_DBG_LVL 1 | 710 | #define MEGASAS_DBG_LVL 1 |
710 | 711 | ||
711 | #define MEGASAS_FW_BUSY 1 | 712 | #define MEGASAS_FW_BUSY 1 |