diff options
| author | Saurav Kashyap <skashyap@marvell.com> | 2019-06-24 01:29:59 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-06-26 22:42:45 -0400 |
| commit | 3c97b569505f0d467a7fd544b05f1e122c08db67 (patch) | |
| tree | 7d3192697e0e99e6ce59a7b52c50f7d5524e440a /drivers/scsi/bnx2fc | |
| parent | 25ad7394c7783a5bc73f7a930bda3a7a7f3195cb (diff) | |
scsi: bnx2fc: Limit the IO size according to the FW capability
- Reduce the sg_tablesize to 255.
- Reduce the MAX BDs firmware can handle to 255.
- Return IO to ML if BD goes more then 255 after split.
- Correct the size of each BD split to 0xffff.
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/bnx2fc')
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc.h | 5 | ||||
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc_io.c | 11 |
3 files changed, 16 insertions, 3 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc.h b/drivers/scsi/bnx2fc/bnx2fc.h index 14cc6921a1b8..170abe90007a 100644 --- a/drivers/scsi/bnx2fc/bnx2fc.h +++ b/drivers/scsi/bnx2fc/bnx2fc.h @@ -75,8 +75,9 @@ #define BNX2X_DOORBELL_PCI_BAR 2 #define BNX2FC_MAX_BD_LEN 0xffff -#define BNX2FC_BD_SPLIT_SZ 0x8000 -#define BNX2FC_MAX_BDS_PER_CMD 256 +#define BNX2FC_BD_SPLIT_SZ 0xffff +#define BNX2FC_MAX_BDS_PER_CMD 255 +#define BNX2FC_FW_MAX_BDS_PER_CMD 255 #define BNX2FC_SQ_WQES_MAX 256 diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index a75e74ad1698..7796799bf04a 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -2971,7 +2971,8 @@ static struct scsi_host_template bnx2fc_shost_template = { .this_id = -1, .cmd_per_lun = 3, .sg_tablesize = BNX2FC_MAX_BDS_PER_CMD, - .max_sectors = 1024, + .dma_boundary = 0x7fff, + .max_sectors = 0x3fbf, .track_queue_depth = 1, .slave_configure = bnx2fc_slave_configure, .shost_attrs = bnx2fc_host_attrs, diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c index d7eb5e16efd3..9e50e5b53763 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_io.c +++ b/drivers/scsi/bnx2fc/bnx2fc_io.c @@ -1660,6 +1660,7 @@ static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) u64 addr; int i; + WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD); /* * Use dma_map_sg directly to ensure we're using the correct * dev struct off of pcidev. @@ -1707,6 +1708,16 @@ static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) } io_req->bd_tbl->bd_valid = bd_count; + /* + * Return the command to ML if BD count exceeds the max number + * that can be handled by FW. + */ + if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) { + pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n", + bd_count, io_req->xid); + return -ENOMEM; + } + return 0; } |