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scsi: qla2xxx: Add ql2xiniexchg parameter

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Previously, the ql2xexchoffld module parameter was used to control the
max number of exchanges to be offload onto host memory.

Module parameter ql_dm_tgt_ex_pct was used to control the percentage of
exchanges allocated to the Target side.

With this patch, module parameter ql_dm_tgt_ex_pct is no longer used to
control exchanges for the driver. New module parameter ql2xiniexchg is
added to control exchanges between target mode and initiator mode.

With the updated module parameters, users can control the exact number
of exchanges for either Initiator or Target. The exchange offload
feature will be automatically enabled when the total number of exchanges
exceeds 2048 limit.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran
2017-06-02 09:12:03 -07:00
committed by Martin K. Petersen
parent f7e761f56c
commit 99e1b683c4
7 changed files with 137 additions and 82 deletions
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6
drivers/scsi/qla2xxx/qla_def.h
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@@ -286,7 +286,7 @@ struct name_list_extended {
#define RESPONSE_ENTRY_CNT_MQ 128 /* Number of response entries.*/
#define ATIO_ENTRY_CNT_24XX 4096 /* Number of ATIO entries. */
#define RESPONSE_ENTRY_CNT_FX00 256 /* Number of response entries.*/
#define EXTENDED_EXCH_ENTRY_CNT 32768 /* Entries for offload case */
#define FW_DEF_EXCHANGES_CNT 2048
struct req_que;
struct qla_tgt_sess;
@@ -3593,6 +3593,10 @@ struct qla_hw_data {
#define IS_SHADOW_REG_CAPABLE(ha) (IS_QLA27XX(ha))
#define IS_DPORT_CAPABLE(ha) (IS_QLA83XX(ha) || IS_QLA27XX(ha))
#define IS_FAWWN_CAPABLE(ha) (IS_QLA83XX(ha) || IS_QLA27XX(ha))
#define IS_EXCHG_OFFLD_CAPABLE(ha) \
(IS_QLA81XX(ha) || IS_QLA83XX(ha) || IS_QLA27XX(ha))
#define IS_EXLOGIN_OFFLD_CAPABLE(ha) \
(IS_QLA25XX(ha) || IS_QLA81XX(ha) || IS_QLA83XX(ha) || IS_QLA27XX(ha))
/* HBA serial number */
uint8_t serial0;