From d2b292c3f6fdef5819a276acd64915bae6384a7f Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Thu, 28 Dec 2017 12:33:17 -0800 Subject: [PATCH] scsi: qla2xxx: Enable ATIO interrupt handshake for ISP27XX Enable ATIO Q interrupt handshake for ISP27XX. This patch coalesce ATIO's interrupts for Quad port ISP27XX adapter. Interrupt coalesce allows performance to scale for this specific case. Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_target.c | 39 ++++++++++++++++++++----------- 1 file changed, 25 insertions(+), 14 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 067bcc57a9ad..db6fd3b747ed 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -6574,7 +6574,9 @@ void qlt_24xx_config_rings(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; - struct init_cb_24xx *icb; + struct qla_msix_entry *msix = &ha->msix_entries[2]; + struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; + if (!QLA_TGT_MODE_ENABLED()) return; @@ -6582,19 +6584,28 @@ qlt_24xx_config_rings(struct scsi_qla_host *vha) WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); - icb = (struct init_cb_24xx *)ha->init_cb; - - if ((ql2xenablemsix != 0) && IS_ATIO_MSIX_CAPABLE(ha)) { - struct qla_msix_entry *msix = &ha->msix_entries[2]; - - icb->msix_atio = cpu_to_le16(msix->entry); - ql_dbg(ql_dbg_init, vha, 0xf072, - "Registering ICB vector 0x%x for atio que.\n", - msix->entry); - } else if (ql2xenablemsix == 0) { - icb->firmware_options_2 |= cpu_to_le32(BIT_26); - ql_dbg(ql_dbg_init, vha, 0xf07f, - "Registering INTx vector for ATIO.\n"); + if (ha->flags.msix_enabled) { + if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) { + if (IS_QLA2071(ha)) { + /* 4 ports Baker: Enable Interrupt Handshake */ + icb->msix_atio = 0; + icb->firmware_options_2 |= BIT_26; + } else { + icb->msix_atio = cpu_to_le16(msix->entry); + icb->firmware_options_2 &= ~BIT_26; + } + ql_dbg(ql_dbg_init, vha, 0xf072, + "Registering ICB vector 0x%x for atio que.\n", + msix->entry); + } + } else { + /* INTx|MSI */ + if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) { + icb->msix_atio = 0; + icb->firmware_options_2 |= BIT_26; + ql_dbg(ql_dbg_init, vha, 0xf072, + "%s: Use INTx for ATIOQ.\n", __func__); + } } } -- 2.30.2