IB/srp: Use new verbs IB DMA mapping functions

Convert SRP to use the new verbs DMA mapping functions for kernel
verbs consumers.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

2 files changed, 49 insertions, 34 deletions

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index a6289595557..e9b6a6f07dd 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -122,9 +122,8 @@ static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size,
         if (!iu->buf)
                 goto out_free_iu;
 
-        iu->dma = dma_map_single(host->dev->dev->dma_device,
-                                 iu->buf, size, direction);
-        if (dma_mapping_error(iu->dma))
+        iu->dma = ib_dma_map_single(host->dev->dev, iu->buf, size, direction);
+        if (ib_dma_mapping_error(host->dev->dev, iu->dma))
                 goto out_free_buf;
 
         iu->size      = size;
@@ -145,8 +144,7 @@ static void srp_free_iu(struct srp_host *host, struct srp_iu *iu)
         if (!iu)
                 return;
 
-        dma_unmap_single(host->dev->dev->dma_device,
-                         iu->dma, iu->size, iu->direction);
+        ib_dma_unmap_single(host->dev->dev, iu->dma, iu->size, iu->direction);
         kfree(iu->buf);
         kfree(iu);
 }
@@ -482,8 +480,8 @@ static void srp_unmap_data(struct scsi_cmnd *scmnd,
                 scat  = &req->fake_sg;
         }
 
-        dma_unmap_sg(target->srp_host->dev->dev->dma_device, scat, nents,
-                     scmnd->sc_data_direction);
+        ib_dma_unmap_sg(target->srp_host->dev->dev, scat, nents,
+                        scmnd->sc_data_direction);
 }
 
 static void srp_remove_req(struct srp_target_port *target, struct srp_request *req)
@@ -595,23 +593,26 @@ static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat,
         int i, j;
         int ret;
         struct srp_device *dev = target->srp_host->dev;
+        struct ib_device *ibdev = dev->dev;
 
         if (!dev->fmr_pool)
                 return -ENODEV;
 
-        if ((sg_dma_address(&scat[0]) & ~dev->fmr_page_mask) &&
+        if ((ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask) &&
             mellanox_workarounds && !memcmp(&target->ioc_guid, mellanox_oui, 3))
                 return -EINVAL;
 
         len = page_cnt = 0;
         for (i = 0; i < sg_cnt; ++i) {
-                if (sg_dma_address(&scat[i]) & ~dev->fmr_page_mask) {
+                unsigned int dma_len = ib_sg_dma_len(ibdev, &scat[i]);
+
+                if (ib_sg_dma_address(ibdev, &scat[i]) & ~dev->fmr_page_mask) {
                         if (i > 0)
                                 return -EINVAL;
                         else
                                 ++page_cnt;
                 }
-                if ((sg_dma_address(&scat[i]) + sg_dma_len(&scat[i])) &
+                if ((ib_sg_dma_address(ibdev, &scat[i]) + dma_len) &
                     ~dev->fmr_page_mask) {
                         if (i < sg_cnt - 1)
                                 return -EINVAL;
@@ -619,7 +620,7 @@ static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat,
                                 ++page_cnt;
                 }
 
-                len += sg_dma_len(&scat[i]);
+                len += dma_len;
         }
 
         page_cnt += len >> dev->fmr_page_shift;
@@ -631,10 +632,14 @@ static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat,
                 return -ENOMEM;
 
         page_cnt = 0;
-        for (i = 0; i < sg_cnt; ++i)
-                for (j = 0; j < sg_dma_len(&scat[i]); j += dev->fmr_page_size)
+        for (i = 0; i < sg_cnt; ++i) {
+                unsigned int dma_len = ib_sg_dma_len(ibdev, &scat[i]);
+
+                for (j = 0; j < dma_len; j += dev->fmr_page_size)
                         dma_pages[page_cnt++] =
-                                (sg_dma_address(&scat[i]) & dev->fmr_page_mask) + j;
+                                (ib_sg_dma_address(ibdev, &scat[i]) &
+                                 dev->fmr_page_mask) + j;
+        }
 
         req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool,
                                         dma_pages, page_cnt, io_addr);
@@ -644,7 +649,8 @@ static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat,
                 goto out;
         }
 
-        buf->va  = cpu_to_be64(sg_dma_address(&scat[0]) & ~dev->fmr_page_mask);
+        buf->va  = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) &
+                               ~dev->fmr_page_mask);
         buf->key = cpu_to_be32(req->fmr->fmr->rkey);
         buf->len = cpu_to_be32(len);
 
@@ -663,6 +669,8 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
         struct srp_cmd *cmd = req->cmd->buf;
         int len, nents, count;
         u8 fmt = SRP_DATA_DESC_DIRECT;
+        struct srp_device *dev;
+        struct ib_device *ibdev;
 
         if (!scmnd->request_buffer || scmnd->sc_data_direction == DMA_NONE)
                 return sizeof (struct srp_cmd);
@@ -687,8 +695,10 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
                 sg_init_one(scat, scmnd->request_buffer, scmnd->request_bufflen);
         }
 
-        count = dma_map_sg(target->srp_host->dev->dev->dma_device,
-                           scat, nents, scmnd->sc_data_direction);
+        dev = target->srp_host->dev;
+        ibdev = dev->dev;
+
+        count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction);
 
         fmt = SRP_DATA_DESC_DIRECT;
         len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf);
@@ -702,9 +712,9 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
                  */
                 struct srp_direct_buf *buf = (void *) cmd->add_data;
 
-                buf->va  = cpu_to_be64(sg_dma_address(scat));
-                buf->key = cpu_to_be32(target->srp_host->dev->mr->rkey);
-                buf->len = cpu_to_be32(sg_dma_len(scat));
+                buf->va  = cpu_to_be64(ib_sg_dma_address(ibdev, scat));
+                buf->key = cpu_to_be32(dev->mr->rkey);
+                buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat));
         } else if (srp_map_fmr(target, scat, count, req,
                                (void *) cmd->add_data)) {
                 /*
@@ -722,13 +732,14 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
                         count * sizeof (struct srp_direct_buf);
 
                 for (i = 0; i < count; ++i) {
+                        unsigned int dma_len = ib_sg_dma_len(ibdev, &scat[i]);
+
                         buf->desc_list[i].va  =
-                                cpu_to_be64(sg_dma_address(&scat[i]));
+                                cpu_to_be64(ib_sg_dma_address(ibdev, &scat[i]));
                         buf->desc_list[i].key =
-                                cpu_to_be32(target->srp_host->dev->mr->rkey);
-                        buf->desc_list[i].len =
-                                cpu_to_be32(sg_dma_len(&scat[i]));
-                        datalen += sg_dma_len(&scat[i]);
+                                cpu_to_be32(dev->mr->rkey);
+                        buf->desc_list[i].len = cpu_to_be32(dma_len);
+                        datalen += dma_len;
                 }
 
                 if (scmnd->sc_data_direction == DMA_TO_DEVICE)
@@ -808,13 +819,15 @@ static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
 
 static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc)
 {
+        struct ib_device *dev;
         struct srp_iu *iu;
         u8 opcode;
 
         iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV];
 
-        dma_sync_single_for_cpu(target->srp_host->dev->dev->dma_device, iu->dma,
-                                target->max_ti_iu_len, DMA_FROM_DEVICE);
+        dev = target->srp_host->dev->dev;
+        ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len,
+                                   DMA_FROM_DEVICE);
 
         opcode = *(u8 *) iu->buf;
 
@@ -850,8 +863,8 @@ static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc)
                 break;
         }
 
-        dma_sync_single_for_device(target->srp_host->dev->dev->dma_device, iu->dma,
-                                   target->max_ti_iu_len, DMA_FROM_DEVICE);
+        ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len,
+                                      DMA_FROM_DEVICE);
 }
 
 static void srp_completion(struct ib_cq *cq, void *target_ptr)
@@ -969,6 +982,7 @@ static int srp_queuecommand(struct scsi_cmnd *scmnd,
         struct srp_request *req;
         struct srp_iu *iu;
         struct srp_cmd *cmd;
+        struct ib_device *dev;
         int len;
 
         if (target->state == SRP_TARGET_CONNECTING)
@@ -985,8 +999,9 @@ static int srp_queuecommand(struct scsi_cmnd *scmnd,
         if (!iu)
                 goto err;
 
-        dma_sync_single_for_cpu(target->srp_host->dev->dev->dma_device, iu->dma,
-                                srp_max_iu_len, DMA_TO_DEVICE);
+        dev = target->srp_host->dev->dev;
+        ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len,
+                                   DMA_TO_DEVICE);
 
         req = list_entry(target->free_reqs.next, struct srp_request, list);
 
@@ -1018,8 +1033,8 @@ static int srp_queuecommand(struct scsi_cmnd *scmnd,
                 goto err_unmap;
         }
 
-        dma_sync_single_for_device(target->srp_host->dev->dev->dma_device, iu->dma,
-                                   srp_max_iu_len, DMA_TO_DEVICE);
+        ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len,
+                                      DMA_TO_DEVICE);
 
         if (__srp_post_send(target, iu, len)) {
                 printk(KERN_ERR PFX "Send failed\n");
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index d4e35ef5137..868a540ef7c 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -161,7 +161,7 @@ struct srp_target_port {
 };
 
 struct srp_iu {
-        dma_addr_t              dma;
+        u64                     dma;
         void                   *buf;
         size_t                  size;
         enum dma_data_direction direction;