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Commit d2b292c3 authored Dec 28, 2017 by Quinn Tran Committed by Martin K. Petersen Jan 03, 2018

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 <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

parent 9b3e0f4d

drivers/scsi/qla2xxx/qla_target.c

+25 −14

Original line number	Diff line number	Diff line
		@@ -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];

		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 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");
		}
		} 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__);
		}
		}
		}