Allow setting a "dmabarrier" when the mthca driver registers user-
allocated memory.
Signed-off-by: Arthur Kepner <[email protected]>
---
mthca_provider.c | 7 ++++++-
mthca_user.h | 10 +++++++++-
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 17486a4..c818708 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -1017,17 +1017,22 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
struct mthca_dev *dev = to_mdev(pd->device);
struct ib_umem_chunk *chunk;
struct mthca_mr *mr;
+ struct mthca_reg_mr ucmd;
u64 *pages;
int shift, n, len;
int i, j, k;
int err = 0;
int write_mtt_size;
+ if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
+ return ERR_PTR(-EFAULT);
+
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
- mr->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
+ mr->umem = ib_umem_get(pd->uobject->context, start, length, acc,
+ ucmd.mr_attrs & MTHCA_MR_DMAFLUSH);
if (IS_ERR(mr->umem)) {
err = PTR_ERR(mr->umem);
goto err;
diff --git a/drivers/infiniband/hw/mthca/mthca_user.h b/drivers/infiniband/hw/mthca/mthca_user.h
index 02cc0a7..5662aea 100644
--- a/drivers/infiniband/hw/mthca/mthca_user.h
+++ b/drivers/infiniband/hw/mthca/mthca_user.h
@@ -41,7 +41,7 @@
* Increment this value if any changes that break userspace ABI
* compatibility are made.
*/
-#define MTHCA_UVERBS_ABI_VERSION 1
+#define MTHCA_UVERBS_ABI_VERSION 2
/*
* Make sure that all structs defined in this file remain laid out so
@@ -61,6 +61,14 @@ struct mthca_alloc_pd_resp {
__u32 reserved;
};
+struct mthca_reg_mr {
+ __u32 mr_attrs;
+#define MTHCA_MR_DMAFLUSH 0x1 /* flush in-flight DMA on a write to
+ * memory region */
+ __u32 reserved;
+};
+
+
struct mthca_create_cq {
__u32 lkey;
__u32 pdn;
-
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