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

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/core: Remove unused struct ib_device.flags member
  IB/core: Add IP checksum offload support
  IPoIB: Add send gather support
  IPoIB: Add high DMA feature flag
  IB/mlx4: Use multiple WQ blocks to post smaller send WQEs
  mlx4_core: Clean up struct mlx4_buf
  mlx4_core: For 64-bit systems, vmap() kernel queue buffers
  IB/mlx4: Consolidate code to get an entry from a struct mlx4_buf

2 files changed, 34 insertions, 18 deletions

diff --git a/drivers/net/mlx4/alloc.c b/drivers/net/mlx4/alloc.c
index b226e019bc8b..521dc0322ee4 100644
--- a/drivers/net/mlx4/alloc.c
+++ b/drivers/net/mlx4/alloc.c
@@ -116,40 +116,53 @@ int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
                 buf->nbufs        = 1;
                 buf->npages       = 1;
                 buf->page_shift   = get_order(size) + PAGE_SHIFT;
-                buf->u.direct.buf = dma_alloc_coherent(&dev->pdev->dev,
+                buf->direct.buf   = dma_alloc_coherent(&dev->pdev->dev,
                                                        size, &t, GFP_KERNEL);
-                if (!buf->u.direct.buf)
+                if (!buf->direct.buf)
                         return -ENOMEM;
 
-                buf->u.direct.map = t;
+                buf->direct.map = t;
 
                 while (t & ((1 << buf->page_shift) - 1)) {
                         --buf->page_shift;
                         buf->npages *= 2;
                 }
 
-                memset(buf->u.direct.buf, 0, size);
+                memset(buf->direct.buf, 0, size);
         } else {
                 int i;
 
                 buf->nbufs       = (size + PAGE_SIZE - 1) / PAGE_SIZE;
                 buf->npages      = buf->nbufs;
                 buf->page_shift  = PAGE_SHIFT;
-                buf->u.page_list = kzalloc(buf->nbufs * sizeof *buf->u.page_list,
+                buf->page_list   = kzalloc(buf->nbufs * sizeof *buf->page_list,
                                            GFP_KERNEL);
-                if (!buf->u.page_list)
+                if (!buf->page_list)
                         return -ENOMEM;
 
                 for (i = 0; i < buf->nbufs; ++i) {
-                        buf->u.page_list[i].buf =
+                        buf->page_list[i].buf =
                                 dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
                                                    &t, GFP_KERNEL);
-                        if (!buf->u.page_list[i].buf)
+                        if (!buf->page_list[i].buf)
                                 goto err_free;
 
-                        buf->u.page_list[i].map = t;
+                        buf->page_list[i].map = t;
 
-                        memset(buf->u.page_list[i].buf, 0, PAGE_SIZE);
+                        memset(buf->page_list[i].buf, 0, PAGE_SIZE);
+                }
+
+                if (BITS_PER_LONG == 64) {
+                        struct page **pages;
+                        pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
+                        if (!pages)
+                                goto err_free;
+                        for (i = 0; i < buf->nbufs; ++i)
+                                pages[i] = virt_to_page(buf->page_list[i].buf);
+                        buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
+                        kfree(pages);
+                        if (!buf->direct.buf)
+                                goto err_free;
                 }
         }
 
@@ -167,15 +180,18 @@ void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf)
         int i;
 
         if (buf->nbufs == 1)
-                dma_free_coherent(&dev->pdev->dev, size, buf->u.direct.buf,
-                                  buf->u.direct.map);
+                dma_free_coherent(&dev->pdev->dev, size, buf->direct.buf,
+                                  buf->direct.map);
         else {
+                if (BITS_PER_LONG == 64)
+                        vunmap(buf->direct.buf);
+
                 for (i = 0; i < buf->nbufs; ++i)
-                        if (buf->u.page_list[i].buf)
+                        if (buf->page_list[i].buf)
                                 dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
-                                                  buf->u.page_list[i].buf,
-                                                  buf->u.page_list[i].map);
-                kfree(buf->u.page_list);
+                                                  buf->page_list[i].buf,
+                                                  buf->page_list[i].map);
+                kfree(buf->page_list);
         }
 }
 EXPORT_SYMBOL_GPL(mlx4_buf_free);
diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
index 9c9e308d0917..679dfdb6807f 100644
--- a/drivers/net/mlx4/mr.c
+++ b/drivers/net/mlx4/mr.c
@@ -419,9 +419,9 @@ int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
 
         for (i = 0; i < buf->npages; ++i)
                 if (buf->nbufs == 1)
-                        page_list[i] = buf->u.direct.map + (i << buf->page_shift);
+                        page_list[i] = buf->direct.map + (i << buf->page_shift);
                 else
-                        page_list[i] = buf->u.page_list[i].map;
+                        page_list[i] = buf->page_list[i].map;
 
         err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list);