Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband updates from Roland Dreier:
 "Main batch of InfiniBand/RDMA changes for 3.15:

   - The biggest change is core API extensions and mlx5 low-level driver
     support for handling DIF/DIX-style protection information, and the
     addition of PI support to the iSER initiator.  Target support will
     be arriving shortly through the SCSI target tree.

   - A nice simplification to the "umem" memory pinning library now that
     we have chained sg lists.  Kudos to Yishai Hadas for realizing our
     code didn't have to be so crazy.

   - Another nice simplification to the sg wrappers used by qib, ipath
     and ehca to handle their mapping of memory to adapter.

   - The usual batch of fixes to bugs found by static checkers etc.
     from intrepid people like Dan Carpenter and Yann Droneaud.

   - A large batch of cxgb4, ocrdma, qib driver updates"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (102 commits)
  RDMA/ocrdma: Unregister inet notifier when unloading ocrdma
  RDMA/ocrdma: Fix warnings about pointer <-> integer casts
  RDMA/ocrdma: Code clean-up
  RDMA/ocrdma: Display FW version
  RDMA/ocrdma: Query controller information
  RDMA/ocrdma: Support non-embedded mailbox commands
  RDMA/ocrdma: Handle CQ overrun error
  RDMA/ocrdma: Display proper value for max_mw
  RDMA/ocrdma: Use non-zero tag in SRQ posting
  RDMA/ocrdma: Memory leak fix in ocrdma_dereg_mr()
  RDMA/ocrdma: Increment abi version count
  RDMA/ocrdma: Update version string
  be2net: Add abi version between be2net and ocrdma
  RDMA/ocrdma: ABI versioning between ocrdma and be2net
  RDMA/ocrdma: Allow DPP QP creation
  RDMA/ocrdma: Read ASIC_ID register to select asic_gen
  RDMA/ocrdma: SQ and RQ doorbell offset clean up
  RDMA/ocrdma: EQ full catastrophe avoidance
  RDMA/cxgb4: Disable DSGL use by default
  RDMA/cxgb4: rx_data() needs to hold the ep mutex
  ...

1 files changed, 29 insertions, 26 deletions

diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
index 41b11951a30a..f9ca072a99ed 100644
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -37,9 +37,9 @@
 
 #include "iw_cxgb4.h"
 
-int use_dsgl = 1;
+int use_dsgl = 0;
 module_param(use_dsgl, int, 0644);
-MODULE_PARM_DESC(use_dsgl, "Use DSGL for PBL/FastReg (default=1)");
+MODULE_PARM_DESC(use_dsgl, "Use DSGL for PBL/FastReg (default=0)");
 
 #define T4_ULPTX_MIN_IO 32
 #define C4IW_MAX_INLINE_SIZE 96
@@ -678,9 +678,9 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 {
 	__be64 *pages;
 	int shift, n, len;
-	int i, j, k;
+	int i, k, entry;
 	int err = 0;
-	struct ib_umem_chunk *chunk;
+	struct scatterlist *sg;
 	struct c4iw_dev *rhp;
 	struct c4iw_pd *php;
 	struct c4iw_mr *mhp;
@@ -710,10 +710,7 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 
 	shift = ffs(mhp->umem->page_size) - 1;
 
-	n = 0;
-	list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
-		n += chunk->nents;
-
+	n = mhp->umem->nmap;
 	err = alloc_pbl(mhp, n);
 	if (err)
 		goto err;
@@ -726,24 +723,22 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 
 	i = n = 0;
 
-	list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
-		for (j = 0; j < chunk->nmap; ++j) {
-			len = sg_dma_len(&chunk->page_list[j]) >> shift;
-			for (k = 0; k < len; ++k) {
-				pages[i++] = cpu_to_be64(sg_dma_address(
-					&chunk->page_list[j]) +
-					mhp->umem->page_size * k);
-				if (i == PAGE_SIZE / sizeof *pages) {
-					err = write_pbl(&mhp->rhp->rdev,
-					      pages,
-					      mhp->attr.pbl_addr + (n << 3), i);
-					if (err)
-						goto pbl_done;
-					n += i;
-					i = 0;
-				}
+	for_each_sg(mhp->umem->sg_head.sgl, sg, mhp->umem->nmap, entry) {
+		len = sg_dma_len(sg) >> shift;
+		for (k = 0; k < len; ++k) {
+			pages[i++] = cpu_to_be64(sg_dma_address(sg) +
+				mhp->umem->page_size * k);
+			if (i == PAGE_SIZE / sizeof *pages) {
+				err = write_pbl(&mhp->rhp->rdev,
+				      pages,
+				      mhp->attr.pbl_addr + (n << 3), i);
+				if (err)
+					goto pbl_done;
+				n += i;
+				i = 0;
 			}
 		}
+	}
 
 	if (i)
 		err = write_pbl(&mhp->rhp->rdev, pages,
@@ -903,7 +898,11 @@ struct ib_fast_reg_page_list *c4iw_alloc_fastreg_pbl(struct ib_device *device,
 	dma_unmap_addr_set(c4pl, mapping, dma_addr);
 	c4pl->dma_addr = dma_addr;
 	c4pl->dev = dev;
-	c4pl->ibpl.max_page_list_len = pll_len;
+	c4pl->pll_len = pll_len;
+
+	PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %pad\n",
+	     __func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list,
+	     &c4pl->dma_addr);
 
 	return &c4pl->ibpl;
 }
@@ -912,8 +911,12 @@ void c4iw_free_fastreg_pbl(struct ib_fast_reg_page_list *ibpl)
 {
 	struct c4iw_fr_page_list *c4pl = to_c4iw_fr_page_list(ibpl);
 
+	PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %pad\n",
+	     __func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list,
+	     &c4pl->dma_addr);
+
 	dma_free_coherent(&c4pl->dev->rdev.lldi.pdev->dev,
-			  c4pl->ibpl.max_page_list_len,
+			  c4pl->pll_len,
 			  c4pl->ibpl.page_list, dma_unmap_addr(c4pl, mapping));
 	kfree(c4pl);
 }