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sata_mv ncq Add want ncq parameter for EDMA configuration
An extra EDMA config bit is required for NCQ operation. So set/clear it as needed, and cache current setting in port_priv. For now though, it will always be "off" (0). Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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parent
0c58912e19
commit
721091685f
1 changed files with 23 additions and 8 deletions
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@ -331,6 +331,7 @@ enum {
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/* Port private flags (pp_flags) */
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MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */
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MV_PP_FLAG_NCQ_EN = (1 << 1), /* is EDMA set up for NCQ? */
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MV_PP_FLAG_HAD_A_RESET = (1 << 2), /* 1st hard reset complete? */
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};
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@ -471,8 +472,9 @@ static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
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static void mv_reset_pci_bus(struct pci_dev *pdev, void __iomem *mmio);
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static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio,
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unsigned int port_no);
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static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
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void __iomem *port_mmio);
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static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
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void __iomem *port_mmio, int want_ncq);
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static int __mv_stop_dma(struct ata_port *ap);
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static struct scsi_host_template mv5_sht = {
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.module = THIS_MODULE,
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@ -838,8 +840,15 @@ static void mv_set_edma_ptrs(void __iomem *port_mmio,
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* Inherited from caller.
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*/
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static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
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struct mv_port_priv *pp)
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struct mv_port_priv *pp, u8 protocol)
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{
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int want_ncq = (protocol == ATA_PROT_NCQ);
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if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
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int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0);
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if (want_ncq != using_ncq)
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__mv_stop_dma(ap);
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}
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if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
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struct mv_host_priv *hpriv = ap->host->private_data;
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int hard_port = mv_hardport_from_port(ap->port_no);
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@ -859,7 +868,7 @@ static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
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hc_mmio + HC_IRQ_CAUSE_OFS);
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}
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mv_edma_cfg(ap, hpriv, port_mmio);
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mv_edma_cfg(pp, hpriv, port_mmio, want_ncq);
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/* clear FIS IRQ Cause */
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writelfl(0, port_mmio + SATA_FIS_IRQ_CAUSE_OFS);
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@ -1045,8 +1054,8 @@ static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
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return -EINVAL;
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}
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static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
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void __iomem *port_mmio)
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static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
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void __iomem *port_mmio, int want_ncq)
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{
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u32 cfg;
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@ -1066,6 +1075,12 @@ static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
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cfg |= (1 << 17); /* enab cut-through (dis stor&forwrd) */
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}
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if (want_ncq) {
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cfg |= EDMA_CFG_NCQ;
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pp->pp_flags |= MV_PP_FLAG_NCQ_EN;
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} else
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pp->pp_flags &= ~MV_PP_FLAG_NCQ_EN;
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writelfl(cfg, port_mmio + EDMA_CFG_OFS);
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}
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@ -1128,7 +1143,7 @@ static int mv_port_start(struct ata_port *ap)
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spin_lock_irqsave(&ap->host->lock, flags);
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mv_edma_cfg(ap, hpriv, port_mmio);
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mv_edma_cfg(pp, hpriv, port_mmio, 0);
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mv_set_edma_ptrs(port_mmio, hpriv, pp);
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@ -1396,7 +1411,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
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return ata_qc_issue_prot(qc);
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}
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mv_start_dma(ap, port_mmio, pp);
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mv_start_dma(ap, port_mmio, pp, qc->tf.protocol);
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in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK;
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