diff options
Diffstat (limited to 'drivers/ata/sata_mv.c')
| -rw-r--r-- | drivers/ata/sata_mv.c | 71 |
1 files changed, 50 insertions, 21 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 9463c71dd38..bf74a36d3cc 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -1898,19 +1898,25 @@ static void mv_bmdma_start(struct ata_queued_cmd *qc) * LOCKING: * Inherited from caller. */ -static void mv_bmdma_stop(struct ata_queued_cmd *qc) +static void mv_bmdma_stop_ap(struct ata_port *ap) { - struct ata_port *ap = qc->ap; void __iomem *port_mmio = mv_ap_base(ap); u32 cmd; /* clear start/stop bit */ cmd = readl(port_mmio + BMDMA_CMD); - cmd &= ~ATA_DMA_START; - writelfl(cmd, port_mmio + BMDMA_CMD); + if (cmd & ATA_DMA_START) { + cmd &= ~ATA_DMA_START; + writelfl(cmd, port_mmio + BMDMA_CMD); + + /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ + ata_sff_dma_pause(ap); + } +} - /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ - ata_sff_dma_pause(ap); +static void mv_bmdma_stop(struct ata_queued_cmd *qc) +{ + mv_bmdma_stop_ap(qc->ap); } /** @@ -1934,8 +1940,21 @@ static u8 mv_bmdma_status(struct ata_port *ap) reg = readl(port_mmio + BMDMA_STATUS); if (reg & ATA_DMA_ACTIVE) status = ATA_DMA_ACTIVE; - else + else if (reg & ATA_DMA_ERR) status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR; + else { + /* + * Just because DMA_ACTIVE is 0 (DMA completed), + * this does _not_ mean the device is "done". + * So we should not yet be signalling ATA_DMA_INTR + * in some cases. Eg. DSM/TRIM, and perhaps others. + */ + mv_bmdma_stop_ap(ap); + if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY) + status = 0; + else + status = ATA_DMA_INTR; + } return status; } @@ -1995,6 +2014,9 @@ static void mv_qc_prep(struct ata_queued_cmd *qc) switch (tf->protocol) { case ATA_PROT_DMA: + if (tf->command == ATA_CMD_DSM) + return; + /* fall-thru */ case ATA_PROT_NCQ: break; /* continue below */ case ATA_PROT_PIO: @@ -2094,6 +2116,8 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc) if ((tf->protocol != ATA_PROT_DMA) && (tf->protocol != ATA_PROT_NCQ)) return; + if (tf->command == ATA_CMD_DSM) + return; /* use bmdma for this */ /* Fill in Gen IIE command request block */ if (!(tf->flags & ATA_TFLAG_WRITE)) @@ -2260,7 +2284,7 @@ static unsigned int mv_qc_issue_fis(struct ata_queued_cmd *qc) } if (qc->tf.flags & ATA_TFLAG_POLLING) - ata_sff_queue_pio_task(ap, 0); + ata_sff_queue_pio_task(link, 0); return 0; } @@ -2289,6 +2313,12 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc) switch (qc->tf.protocol) { case ATA_PROT_DMA: + if (qc->tf.command == ATA_CMD_DSM) { + if (!ap->ops->bmdma_setup) /* no bmdma on GEN_I */ + return AC_ERR_OTHER; + break; /* use bmdma for this */ + } + /* fall thru */ case ATA_PROT_NCQ: mv_start_edma(ap, port_mmio, pp, qc->tf.protocol); pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK; @@ -2713,18 +2743,11 @@ static void mv_err_intr(struct ata_port *ap) } } -static void mv_process_crpb_response(struct ata_port *ap, +static bool mv_process_crpb_response(struct ata_port *ap, struct mv_crpb *response, unsigned int tag, int ncq_enabled) { u8 ata_status; u16 edma_status = le16_to_cpu(response->flags); - struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); - - if (unlikely(!qc)) { - ata_port_printk(ap, KERN_ERR, "%s: no qc for tag=%d\n", - __func__, tag); - return; - } /* * edma_status from a response queue entry: @@ -2738,13 +2761,14 @@ static void mv_process_crpb_response(struct ata_port *ap, * Error will be seen/handled by * mv_err_intr(). So do nothing at all here. */ - return; + return false; } } ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT; if (!ac_err_mask(ata_status)) - ata_qc_complete(qc); + return true; /* else: leave it for mv_err_intr() */ + return false; } static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp) @@ -2753,6 +2777,7 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp struct mv_host_priv *hpriv = ap->host->private_data; u32 in_index; bool work_done = false; + u32 done_mask = 0; int ncq_enabled = (pp->pp_flags & MV_PP_FLAG_NCQ_EN); /* Get the hardware queue position index */ @@ -2773,15 +2798,19 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp /* Gen II/IIE: get command tag from CRPB entry */ tag = le16_to_cpu(response->id) & 0x1f; } - mv_process_crpb_response(ap, response, tag, ncq_enabled); + if (mv_process_crpb_response(ap, response, tag, ncq_enabled)) + done_mask |= 1 << tag; work_done = true; } - /* Update the software queue position index in hardware */ - if (work_done) + if (work_done) { + ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask); + + /* Update the software queue position index in hardware */ writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | (pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT), port_mmio + EDMA_RSP_Q_OUT_PTR); + } } static void mv_port_intr(struct ata_port *ap, u32 port_cause) |