IB/mlx4: Add support for memory management extensions and local DMA L_Key
Add support for the following operations to mlx4 when device firmware
supports them:
- Send with invalidate and local invalidate send queue work requests;
- Allocate/free fast register MRs;
- Allocate/free fast register MR page lists;
- Fast register MR send queue work requests;
- Local DMA L_Key.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 68e9248..db2086f 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -183,6 +183,76 @@
return 0;
}
+struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
+ int max_page_list_len)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_mr *mr;
+ int err;
+
+ mr = kmalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
+ max_page_list_len, 0, &mr->mmr);
+ if (err)
+ goto err_free;
+
+ err = mlx4_mr_enable(dev->dev, &mr->mmr);
+ if (err)
+ goto err_mr;
+
+ return &mr->ibmr;
+
+err_mr:
+ mlx4_mr_free(dev->dev, &mr->mmr);
+
+err_free:
+ kfree(mr);
+ return ERR_PTR(err);
+}
+
+struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
+ int page_list_len)
+{
+ struct mlx4_ib_dev *dev = to_mdev(ibdev);
+ struct mlx4_ib_fast_reg_page_list *mfrpl;
+ int size = page_list_len * sizeof (u64);
+
+ if (size > PAGE_SIZE)
+ return ERR_PTR(-EINVAL);
+
+ mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
+ if (!mfrpl)
+ return ERR_PTR(-ENOMEM);
+
+ mfrpl->ibfrpl.page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
+ size, &mfrpl->map,
+ GFP_KERNEL);
+ if (!mfrpl->ibfrpl.page_list)
+ goto err_free;
+
+ WARN_ON(mfrpl->map & 0x3f);
+
+ return &mfrpl->ibfrpl;
+
+err_free:
+ kfree(mfrpl);
+ return ERR_PTR(-ENOMEM);
+}
+
+void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
+{
+ struct mlx4_ib_dev *dev = to_mdev(page_list->device);
+ struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
+ int size = page_list->max_page_list_len * sizeof (u64);
+
+ dma_free_coherent(&dev->dev->pdev->dev, size, page_list->page_list,
+ mfrpl->map);
+ kfree(mfrpl);
+}
+
struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
struct ib_fmr_attr *fmr_attr)
{