在 2023/1/3 17:37, Leon Romanovsky 写道:
On Mon, Jan 02, 2023 at 08:34:33PM -0500, Zhu Yanjun wrote:
From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
This is a followup to the EFA dmabuf[1]. Irdma driver currently does
not support on-demand-paging(ODP). So it uses habanalabs as the
dmabuf exporter, and irdma as the importer to allow for peer2peer
access through libibverbs.
In this commit, the function ib_umem_dmabuf_get_pinned() is used.
This function is introduced in EFA dmabuf[1] which allows the driver
to get a dmabuf umem which is pinned and does not require move_notify
callback implementation. The returned umem is pinned and DMA mapped
like standard cpu umems, and is released through ib_umem_release().
[1]https://lore.kernel.org/lkml/20211007114018.GD2688930@xxxxxxxx/t/
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
---
drivers/infiniband/hw/irdma/verbs.c | 158 ++++++++++++++++++++++++++++
1 file changed, 158 insertions(+)
diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index f6973ea55eda..76dc6e65930a 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -2912,6 +2912,163 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
return ERR_PTR(err);
}
+struct ib_mr *irdma_reg_user_mr_dmabuf(struct ib_pd *pd, u64 start,
+ u64 len, u64 virt,
+ int fd, int access,
+ struct ib_udata *udata)
kbuild complained about this line, it should be "static struct ..."
And please use target in your patches: rdma-next/rdma-rc.
static is added.
Please check V2.
Thanks and Regards,
Zhu Yanjun
Thanks
