[SCSI] aic7xxx: convert to use the data buffer accessors

- remove the unnecessary map_single path.

- convert to use the new accessors for the sg lists and the
parameters.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index 660f26e..1803ab6 100644 (file)
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -402,18 +402,8 @@ ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
 
        cmd = scb->io_ctx;
        ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
-       if (cmd->use_sg != 0) {
-               struct scatterlist *sg;
-
-               sg = (struct scatterlist *)cmd->request_buffer;
-               pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
-                            cmd->sc_data_direction);
-       } else if (cmd->request_bufflen != 0) {
-               pci_unmap_single(ahc->dev_softc,
-                                scb->platform_data->buf_busaddr,
-                                cmd->request_bufflen,
-                                cmd->sc_data_direction);
-       }
+
+       scsi_dma_unmap(cmd);
 }
 
 static __inline int
@@ -1381,6 +1371,7 @@ ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
        struct   ahc_tmode_tstate *tstate;
        uint16_t mask;
        struct scb_tailq *untagged_q = NULL;
+       int nseg;
 
        /*
         * Schedule us to run later.  The only reason we are not
@@ -1472,23 +1463,21 @@ ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
        ahc_set_residual(scb, 0);
        ahc_set_sense_residual(scb, 0);
        scb->sg_count = 0;
-       if (cmd->use_sg != 0) {
+
+       nseg = scsi_dma_map(cmd);
+       BUG_ON(nseg < 0);
+       if (nseg > 0) {
                struct  ahc_dma_seg *sg;
                struct  scatterlist *cur_seg;
-               struct  scatterlist *end_seg;
-               int     nseg;
+               int i;
 
-               cur_seg = (struct scatterlist *)cmd->request_buffer;
-               nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
-                                 cmd->sc_data_direction);
-               end_seg = cur_seg + nseg;
                /* Copy the segments into the SG list. */
                sg = scb->sg_list;
                /*
                 * The sg_count may be larger than nseg if
                 * a transfer crosses a 32bit page.
-                */ 
-               while (cur_seg < end_seg) {
+                */
+               scsi_for_each_sg(cmd, cur_seg, nseg, i) {
                        dma_addr_t addr;
                        bus_size_t len;
                        int consumed;
@@ -1499,7 +1488,6 @@ ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
                                                     sg, addr, len);
                        sg += consumed;
                        scb->sg_count += consumed;
-                       cur_seg++;
                }
                sg--;
                sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
@@ -1516,33 +1504,6 @@ ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
                 */
                scb->hscb->dataptr = scb->sg_list->addr;
                scb->hscb->datacnt = scb->sg_list->len;
-       } else if (cmd->request_bufflen != 0) {
-               struct   ahc_dma_seg *sg;
-               dma_addr_t addr;
-
-               sg = scb->sg_list;
-               addr = pci_map_single(ahc->dev_softc,
-                                     cmd->request_buffer,
-                                     cmd->request_bufflen,
-                                     cmd->sc_data_direction);
-               scb->platform_data->buf_busaddr = addr;
-               scb->sg_count = ahc_linux_map_seg(ahc, scb,
-                                                 sg, addr,
-                                                 cmd->request_bufflen);
-               sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
-
-               /*
-                * Reset the sg list pointer.
-                */
-               scb->hscb->sgptr =
-                       ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
-
-               /*
-                * Copy the first SG into the "current"
-                * data pointer area.
-                */
-               scb->hscb->dataptr = sg->addr;
-               scb->hscb->datacnt = sg->len;
        } else {
                scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
                scb->hscb->dataptr = 0;

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.h b/drivers/scsi/aic7xxx/aic7xxx_osm.h
index 8fee7ed..b48dab4 100644 (file)
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.h
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.h
@@ -751,7 +751,7 @@ int ahc_get_transfer_dir(struct scb *scb)
 static __inline
 void ahc_set_residual(struct scb *scb, u_long resid)
 {
-       scb->io_ctx->resid = resid;
+       scsi_set_resid(scb->io_ctx, resid);
 }
 
 static __inline
@@ -763,7 +763,7 @@ void ahc_set_sense_residual(struct scb *scb, u_long resid)
 static __inline
 u_long ahc_get_residual(struct scb *scb)
 {
-       return (scb->io_ctx->resid);
+       return scsi_get_resid(scb->io_ctx);
 }
 
 static __inline