sata_inic162x: kill now unused bmdma related stuff

sata_inic162x doesn't use BMDMA anymore.  Kill bmdma related stuff.

* prdctl manipulation

* port IRQ mask manipulation

* inherit ATA_BASE_SHT instead of ATA_BMDMA_SHT

* BMDMA methods

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 5 insertions, 98 deletions

diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index db57f34d2211..3ca0ee93bc1f 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -101,9 +101,7 @@ enum {
         PIRQ_PENDING            = (1 << 7),  /* port IRQ pending (STAT only) */
 
         PIRQ_ERR                = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
-
-        PIRQ_MASK_DMA_READ      = PIRQ_REPLY | PIRQ_ATA,
-        PIRQ_MASK_OTHER         = PIRQ_REPLY | PIRQ_COMPLETE,
+        PIRQ_MASK_DEFAULT       = PIRQ_REPLY,
         PIRQ_MASK_FREEZE        = 0xff,
 
         /* PORT_PRD_CTL bits */
@@ -206,13 +204,11 @@ struct inic_port_priv {
         dma_addr_t      pkt_dma;
         u32             *cpb_tbl;
         dma_addr_t      cpb_tbl_dma;
-        u8              dfl_prdctl;
-        u8              cached_prdctl;
-        u8              cached_pirq_mask;
 };
 
 static struct scsi_host_template inic_sht = {
-        ATA_BMDMA_SHT(DRV_NAME),
+        ATA_BASE_SHT(DRV_NAME),
+        .sg_tablesize   = LIBATA_MAX_PRD,       /* maybe it can be larger? */
         .dma_boundary   = INIC_DMA_BOUNDARY,
 };
 
@@ -227,23 +223,6 @@ static void __iomem *inic_port_base(struct ata_port *ap)
         return ap->host->iomap[MMIO_BAR] + ap->port_no * PORT_SIZE;
 }
 
-static void __inic_set_pirq_mask(struct ata_port *ap, u8 mask)
-{
-        void __iomem *port_base = inic_port_base(ap);
-        struct inic_port_priv *pp = ap->private_data;
-
-        writeb(mask, port_base + PORT_IRQ_MASK);
-        pp->cached_pirq_mask = mask;
-}
-
-static void inic_set_pirq_mask(struct ata_port *ap, u8 mask)
-{
-        struct inic_port_priv *pp = ap->private_data;
-
-        if (pp->cached_pirq_mask != mask)
-                __inic_set_pirq_mask(ap, mask);
-}
-
 static void inic_reset_port(void __iomem *port_base)
 {
         void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
@@ -297,63 +276,6 @@ static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
         return 0;
 }
 
-/*
- * In TF mode, inic162x is very similar to SFF device.  TF registers
- * function the same.  DMA engine behaves similary using the same PRD
- * format as BMDMA but different command register, interrupt and event
- * notification methods are used.  The following inic_bmdma_*()
- * functions do the impedance matching.
- */
-static void inic_bmdma_setup(struct ata_queued_cmd *qc)
-{
-        struct ata_port *ap = qc->ap;
-        struct inic_port_priv *pp = ap->private_data;
-        void __iomem *port_base = inic_port_base(ap);
-        int rw = qc->tf.flags & ATA_TFLAG_WRITE;
-
-        /* make sure device sees PRD table writes */
-        wmb();
-
-        /* load transfer length */
-        writel(qc->nbytes, port_base + PORT_PRD_XFERLEN);
-
-        /* turn on DMA and specify data direction */
-        pp->cached_prdctl = pp->dfl_prdctl | PRD_CTL_DMAEN;
-        if (!rw)
-                pp->cached_prdctl |= PRD_CTL_WR;
-        writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
-
-        /* issue r/w command */
-        ap->ops->sff_exec_command(ap, &qc->tf);
-}
-
-static void inic_bmdma_start(struct ata_queued_cmd *qc)
-{
-        struct ata_port *ap = qc->ap;
-        struct inic_port_priv *pp = ap->private_data;
-        void __iomem *port_base = inic_port_base(ap);
-
-        /* start host DMA transaction */
-        pp->cached_prdctl |= PRD_CTL_START;
-        writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
-}
-
-static void inic_bmdma_stop(struct ata_queued_cmd *qc)
-{
-        struct ata_port *ap = qc->ap;
-        struct inic_port_priv *pp = ap->private_data;
-        void __iomem *port_base = inic_port_base(ap);
-
-        /* stop DMA engine */
-        writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
-}
-
-static u8 inic_bmdma_status(struct ata_port *ap)
-{
-        /* event is already verified by the interrupt handler */
-        return ATA_DMA_INTR;
-}
-
 static void inic_stop_idma(struct ata_port *ap)
 {
         void __iomem *port_base = inic_port_base(ap);
@@ -631,8 +553,7 @@ static void inic_freeze(struct ata_port *ap)
 {
         void __iomem *port_base = inic_port_base(ap);
 
-        __inic_set_pirq_mask(ap, PIRQ_MASK_FREEZE);
-
+        writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK);
         ap->ops->sff_check_status(ap);
         writeb(0xff, port_base + PORT_IRQ_STAT);
 }
@@ -643,8 +564,7 @@ static void inic_thaw(struct ata_port *ap)
 
         ap->ops->sff_check_status(ap);
         writeb(0xff, port_base + PORT_IRQ_STAT);
-
-        __inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
+        writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK);
 }
 
 static int inic_check_ready(struct ata_link *link)
@@ -707,7 +627,6 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
 static void inic_error_handler(struct ata_port *ap)
 {
         void __iomem *port_base = inic_port_base(ap);
-        struct inic_port_priv *pp = ap->private_data;
         unsigned long flags;
 
         /* reset PIO HSM and stop DMA engine */
@@ -715,7 +634,6 @@ static void inic_error_handler(struct ata_port *ap)
 
         spin_lock_irqsave(ap->lock, flags);
         ap->hsm_task_state = HSM_ST_IDLE;
-        writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
         spin_unlock_irqrestore(ap->lock, flags);
 
         /* PIO and DMA engines have been stopped, perform recovery */
@@ -765,10 +683,8 @@ static int inic_port_resume(struct ata_port *ap)
 
 static int inic_port_start(struct ata_port *ap)
 {
-        void __iomem *port_base = inic_port_base(ap);
         struct device *dev = ap->host->dev;
         struct inic_port_priv *pp;
-        u8 tmp;
         int rc;
 
         /* alloc and initialize private data */
@@ -777,11 +693,6 @@ static int inic_port_start(struct ata_port *ap)
                 return -ENOMEM;
         ap->private_data = pp;
 
-        /* default PRD_CTL value, DMAEN, WR and START off */
-        tmp = readb(port_base + PORT_PRD_CTL);
-        tmp &= ~(PRD_CTL_DMAEN | PRD_CTL_WR | PRD_CTL_START);
-        pp->dfl_prdctl = tmp;
-
         /* Alloc resources */
         rc = ata_port_start(ap);
         if (rc)
@@ -805,10 +716,6 @@ static int inic_port_start(struct ata_port *ap)
 static struct ata_port_operations inic_port_ops = {
         .inherits               = &ata_sff_port_ops,
 
-        .bmdma_setup            = inic_bmdma_setup,
-        .bmdma_start            = inic_bmdma_start,
-        .bmdma_stop             = inic_bmdma_stop,
-        .bmdma_status           = inic_bmdma_status,
         .qc_prep                = inic_qc_prep,
         .qc_issue               = inic_qc_issue,
         .qc_fill_rtf            = inic_qc_fill_rtf,