diff options
Diffstat (limited to 'drivers/scsi/sata_mv.c')
| -rw-r--r-- | drivers/scsi/sata_mv.c | 76 |
1 files changed, 33 insertions, 43 deletions
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index 65dc65304f51..dea9d4e42586 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -308,9 +308,6 @@ struct mv_port_priv { dma_addr_t crpb_dma; struct mv_sg *sg_tbl; dma_addr_t sg_tbl_dma; - - unsigned req_producer; /* cp of req_in_ptr */ - unsigned rsp_consumer; /* cp of rsp_out_ptr */ u32 pp_flags; }; @@ -943,8 +940,6 @@ static int mv_port_start(struct ata_port *ap) writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); - pp->req_producer = pp->rsp_consumer = 0; - /* Don't turn on EDMA here...do it before DMA commands only. Else * we'll be unable to send non-data, PIO, etc due to restricted access * to shadow regs. @@ -1028,10 +1023,9 @@ static void mv_fill_sg(struct ata_queued_cmd *qc) } } -static inline unsigned mv_inc_q_index(unsigned *index) +static inline unsigned mv_inc_q_index(unsigned index) { - *index = (*index + 1) & MV_MAX_Q_DEPTH_MASK; - return *index; + return (index + 1) & MV_MAX_Q_DEPTH_MASK; } static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last) @@ -1059,15 +1053,11 @@ static void mv_qc_prep(struct ata_queued_cmd *qc) u16 *cw; struct ata_taskfile *tf; u16 flags = 0; + unsigned in_index; if (ATA_PROT_DMA != qc->tf.protocol) return; - /* the req producer index should be the same as we remember it */ - WARN_ON(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >> - EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) != - pp->req_producer); - /* Fill in command request block */ if (!(qc->tf.flags & ATA_TFLAG_WRITE)) @@ -1075,13 +1065,17 @@ static void mv_qc_prep(struct ata_queued_cmd *qc) WARN_ON(MV_MAX_Q_DEPTH <= qc->tag); flags |= qc->tag << CRQB_TAG_SHIFT; - pp->crqb[pp->req_producer].sg_addr = + /* get current queue index from hardware */ + in_index = (readl(mv_ap_base(ap) + EDMA_REQ_Q_IN_PTR_OFS) + >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; + + pp->crqb[in_index].sg_addr = cpu_to_le32(pp->sg_tbl_dma & 0xffffffff); - pp->crqb[pp->req_producer].sg_addr_hi = + pp->crqb[in_index].sg_addr_hi = cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16); - pp->crqb[pp->req_producer].ctrl_flags = cpu_to_le16(flags); + pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags); - cw = &pp->crqb[pp->req_producer].ata_cmd[0]; + cw = &pp->crqb[in_index].ata_cmd[0]; tf = &qc->tf; /* Sadly, the CRQB cannot accomodate all registers--there are @@ -1150,16 +1144,12 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc) struct mv_port_priv *pp = ap->private_data; struct mv_crqb_iie *crqb; struct ata_taskfile *tf; + unsigned in_index; u32 flags = 0; if (ATA_PROT_DMA != qc->tf.protocol) return; - /* the req producer index should be the same as we remember it */ - WARN_ON(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >> - EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) != - pp->req_producer); - /* Fill in Gen IIE command request block */ if (!(qc->tf.flags & ATA_TFLAG_WRITE)) @@ -1168,7 +1158,11 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc) WARN_ON(MV_MAX_Q_DEPTH <= qc->tag); flags |= qc->tag << CRQB_TAG_SHIFT; - crqb = (struct mv_crqb_iie *) &pp->crqb[pp->req_producer]; + /* get current queue index from hardware */ + in_index = (readl(mv_ap_base(ap) + EDMA_REQ_Q_IN_PTR_OFS) + >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; + + crqb = (struct mv_crqb_iie *) &pp->crqb[in_index]; crqb->addr = cpu_to_le32(pp->sg_tbl_dma & 0xffffffff); crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16); crqb->flags = cpu_to_le32(flags); @@ -1216,6 +1210,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc) { void __iomem *port_mmio = mv_ap_base(qc->ap); struct mv_port_priv *pp = qc->ap->private_data; + unsigned in_index; u32 in_ptr; if (ATA_PROT_DMA != qc->tf.protocol) { @@ -1227,23 +1222,20 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc) return ata_qc_issue_prot(qc); } - in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS); + in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS); + in_index = (in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; - /* the req producer index should be the same as we remember it */ - WARN_ON(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) != - pp->req_producer); /* until we do queuing, the queue should be empty at this point */ - WARN_ON(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) != - ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >> - EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); + WARN_ON(in_index != ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) + >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); - mv_inc_q_index(&pp->req_producer); /* now incr producer index */ + in_index = mv_inc_q_index(in_index); /* now incr producer index */ mv_start_dma(port_mmio, pp); /* and write the request in pointer to kick the EDMA to life */ in_ptr &= EDMA_REQ_Q_BASE_LO_MASK; - in_ptr |= pp->req_producer << EDMA_REQ_Q_PTR_SHIFT; + in_ptr |= in_index << EDMA_REQ_Q_PTR_SHIFT; writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS); return 0; @@ -1266,28 +1258,26 @@ static u8 mv_get_crpb_status(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); struct mv_port_priv *pp = ap->private_data; + unsigned out_index; u32 out_ptr; u8 ata_status; - out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); - - /* the response consumer index should be the same as we remember it */ - WARN_ON(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) != - pp->rsp_consumer); + out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); + out_index = (out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; - ata_status = pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT; + ata_status = le16_to_cpu(pp->crpb[out_index].flags) + >> CRPB_FLAG_STATUS_SHIFT; /* increment our consumer index... */ - pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer); + out_index = mv_inc_q_index(out_index); /* and, until we do NCQ, there should only be 1 CRPB waiting */ - WARN_ON(((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) >> - EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) != - pp->rsp_consumer); + WARN_ON(out_index != ((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) + >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); /* write out our inc'd consumer index so EDMA knows we're caught up */ out_ptr &= EDMA_RSP_Q_BASE_LO_MASK; - out_ptr |= pp->rsp_consumer << EDMA_RSP_Q_PTR_SHIFT; + out_ptr |= out_index << EDMA_RSP_Q_PTR_SHIFT; writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); /* Return ATA status register for completed CRPB */ |