diff options
| author | Quinn Tran <quinn.tran@cavium.com> | 2017-06-02 19:12:03 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-13 03:48:07 +0300 |
| commit | 99e1b683c4be3fee5cff824af18411cf8cc568d0 (patch) | |
| tree | 9a747eb3b790d265909f8db14c8e77e4be45419a /drivers/scsi/qla2xxx/qla_target.c | |
| parent | f7e761f56c711907ccf342532120f826d5ccff3f (diff) | |
| download | linux-99e1b683c4be3fee5cff824af18411cf8cc568d0.tar.xz | |
scsi: qla2xxx: Add ql2xiniexchg parameter
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>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_target.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 48 |
1 files changed, 10 insertions, 38 deletions
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 3cdffdd90279..324048476d9e 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -59,7 +59,7 @@ MODULE_PARM_DESC(qlini_mode, "when ready " "\"enabled\" (default) - initiator mode will always stay enabled."); -static int ql_dm_tgt_ex_pct = 50; +static int ql_dm_tgt_ex_pct = 0; module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(ql_dm_tgt_ex_pct, "For Dual Mode (qlini_mode=dual), this parameter determines " @@ -6438,8 +6438,9 @@ void qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) { struct qla_hw_data *ha = vha->hw; - u32 tmp; - u16 t; + + if (!QLA_TGT_MODE_ENABLED()) + return; if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) { if (!ha->tgt.saved_set) { @@ -6454,24 +6455,10 @@ qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) ha->tgt.saved_set = 1; } - if (qla_tgt_mode_enabled(vha)) { + if (qla_tgt_mode_enabled(vha)) nv->exchange_count = cpu_to_le16(0xFFFF); - } else { /* dual */ - if (ql_dm_tgt_ex_pct > 100) { - ql_dm_tgt_ex_pct = 50; - } else if (ql_dm_tgt_ex_pct == 100) { - /* leave some for FW */ - ql_dm_tgt_ex_pct = 95; - } - - tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct; - tmp = tmp/100; - if (tmp > 0xffff) - tmp = 0xffff; - - t = tmp & 0xffff; - nv->exchange_count = cpu_to_le16(t); - } + else /* dual */ + nv->exchange_count = cpu_to_le16(ql2xexchoffld); /* Enable target mode */ nv->firmware_options_1 |= cpu_to_le32(BIT_4); @@ -6556,8 +6543,6 @@ void qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) { struct qla_hw_data *ha = vha->hw; - u32 tmp; - u16 t; if (!QLA_TGT_MODE_ENABLED()) return; @@ -6575,23 +6560,10 @@ qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) ha->tgt.saved_set = 1; } - if (qla_tgt_mode_enabled(vha)) { + if (qla_tgt_mode_enabled(vha)) nv->exchange_count = cpu_to_le16(0xFFFF); - } else { /* dual */ - if (ql_dm_tgt_ex_pct > 100) { - ql_dm_tgt_ex_pct = 50; - } else if (ql_dm_tgt_ex_pct == 100) { - /* leave some for FW */ - ql_dm_tgt_ex_pct = 95; - } - - tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct; - tmp = tmp/100; - if (tmp > 0xffff) - tmp = 0xffff; - t = tmp & 0xffff; - nv->exchange_count = cpu_to_le16(t); - } + else /* dual */ + nv->exchange_count = cpu_to_le16(ql2xexchoffld); /* Enable target mode */ nv->firmware_options_1 |= cpu_to_le32(BIT_4); |