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-rw-r--r--drivers/infiniband/hw/mthca/mthca_provider.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index bfd33a470020..9acb8c54ce4f 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -35,6 +35,7 @@
*/
#include <ib_smi.h>
+#include <linux/mm.h>
#include "mthca_dev.h"
#include "mthca_cmd.h"
@@ -340,6 +341,22 @@ static int mthca_dealloc_ucontext(struct ib_ucontext *context)
return 0;
}
+static int mthca_mmap_uar(struct ib_ucontext *context,
+ struct vm_area_struct *vma)
+{
+ if (vma->vm_end - vma->vm_start != PAGE_SIZE)
+ return -EINVAL;
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ if (remap_pfn_range(vma, vma->vm_start,
+ to_mucontext(context)->uar.pfn,
+ PAGE_SIZE, vma->vm_page_prot))
+ return -EAGAIN;
+
+ return 0;
+}
+
static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
@@ -766,6 +783,7 @@ int mthca_register_device(struct mthca_dev *dev)
dev->ib_dev.query_gid = mthca_query_gid;
dev->ib_dev.alloc_ucontext = mthca_alloc_ucontext;
dev->ib_dev.dealloc_ucontext = mthca_dealloc_ucontext;
+ dev->ib_dev.mmap = mthca_mmap_uar;
dev->ib_dev.alloc_pd = mthca_alloc_pd;
dev->ib_dev.dealloc_pd = mthca_dealloc_pd;
dev->ib_dev.create_ah = mthca_ah_create;