scsi: qla2xxx: Add option for use reserve exch for ELS
Add option to tell FW to reserve 1/2 of emergency exchanges for ELS. 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>
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@ -148,6 +148,7 @@ extern int ql2xuctrlirq;
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extern int ql2xnvmeenable;
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extern int ql2xautodetectsfp;
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extern int ql2xenablemsix;
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extern int qla2xuseresexchforels;
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extern int qla2x00_loop_reset(scsi_qla_host_t *);
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extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
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@ -3348,6 +3348,12 @@ qla24xx_update_fw_options(scsi_qla_host_t *vha)
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ha->fw_options[2] |= BIT_4;
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else
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ha->fw_options[2] &= ~BIT_4;
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/* Reserve 1/2 of emergency exchanges for ELS.*/
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if (qla2xuseresexchforels)
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ha->fw_options[2] |= BIT_8;
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else
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ha->fw_options[2] &= ~BIT_8;
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}
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ql_dbg(ql_dbg_init, vha, 0x00e8,
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@ -277,6 +277,12 @@ MODULE_PARM_DESC(ql2xenablemsix,
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" 1 -- enable MSI-X interrupt mechanism.\n"
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" 2 -- enable MSI interrupt mechanism.\n");
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int qla2xuseresexchforels;
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module_param(qla2xuseresexchforels, int, 0444);
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MODULE_PARM_DESC(qla2xuseresexchforels,
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"Reserve 1/2 of emergency exchanges for ELS.\n"
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" 0 (default): disabled");
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/*
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* SCSI host template entry points
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*/
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