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authorbo yang <bo.yang@lsi.com>2007-11-09 12:14:00 +0300
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-01-12 03:22:43 +0300
commit14faea9f7fe1e8805629b50cf14a65a85fe4a4fd (patch)
tree10440492118c4d7c49eced392e0f1e4667933924 /drivers/scsi/megaraid
parent31ea7088974c2405e19d72f17c2afb103ef19e02 (diff)
downloadlinux-14faea9f7fe1e8805629b50cf14a65a85fe4a4fd.tar.xz
[SCSI] megaraid_sas: check max_sgl reported by FW for setting max_sectors_per_req
1. Setting the max_sectors_per_req based on max SGL supported by the FW. Prior versions calculated this value from controller info's max_sectors_1, max_sectors_2. For certain controllers/FW, this was resulting in a value greater than max SGL supported by the FW. Now we take the min of max sgl from FW and max_sectors calculation. 2. Increased MFI_POLL_TIMEOUT_SECS to 60 seconds from 10. FW may take a max of 60 seconds to respond to the INIT cmd. Signed-off-by: Bo Yang <bo.yang@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/megaraid')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas.c14
-rw-r--r--drivers/scsi/megaraid/megaraid_sas.h2
2 files changed, 10 insertions, 6 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 9aee2544798c..7eefbe0681d6 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -1890,6 +1890,7 @@ static int megasas_init_mfi(struct megasas_instance *instance)
u32 reply_q_sz;
u32 max_sectors_1;
u32 max_sectors_2;
+ u32 tmp_sectors;
struct megasas_register_set __iomem *reg_set;
struct megasas_ctrl_info *ctrl_info;
/*
@@ -1982,17 +1983,20 @@ static int megasas_init_mfi(struct megasas_instance *instance)
* Note that older firmwares ( < FW ver 30) didn't report information
* to calculate max_sectors_1. So the number ended up as zero always.
*/
+ tmp_sectors = 0;
if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
ctrl_info->max_strips_per_io;
max_sectors_2 = ctrl_info->max_request_size;
- instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
- ? max_sectors_1 : max_sectors_2;
- } else
- instance->max_sectors_per_req = instance->max_num_sge *
- PAGE_SIZE / 512;
+ tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
+ }
+
+ instance->max_sectors_per_req = instance->max_num_sge *
+ PAGE_SIZE / 512;
+ if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
+ instance->max_sectors_per_req = tmp_sectors;
kfree(ctrl_info);
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index f4ab30094621..9739023a222c 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -571,7 +571,7 @@ struct megasas_ctrl_info {
#define IS_DMA64 (sizeof(dma_addr_t) == 8)
#define MFI_OB_INTR_STATUS_MASK 0x00000002
-#define MFI_POLL_TIMEOUT_SECS 10
+#define MFI_POLL_TIMEOUT_SECS 60
#define MFI_REPLY_1078_MESSAGE_INTERRUPT 0x80000000