* [RFC PATCH] Providers/rxe: Add dma-buf support
@ 2021-09-08 6:20 Shunsuke Mie
0 siblings, 0 replies; only message in thread
From: Shunsuke Mie @ 2021-09-08 6:20 UTC (permalink / raw)
To: Zhu Yanjun
Cc: Christian König, Alex Deucher, Daniel Vetter, Doug Ledford,
Jason Gunthorpe, Jianxin Xiong, Leon Romanovsky, linux-kernel,
linux-rdma, Shunsuke Mie, dhobsong, taki, etom
This is the user space counter-part of the kernel patch set to add
dma-buf support to the RXE driver.
Implement a new provider method for dma-buf base memory registration.
Pull request at GitHub: https://github.com/linux-rdma/rdma-core/pull/1055
Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
---
providers/rxe/rxe.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/providers/rxe/rxe.c b/providers/rxe/rxe.c
index 3c3ea8bb..0e6b1ecd 100644
--- a/providers/rxe/rxe.c
+++ b/providers/rxe/rxe.c
@@ -239,6 +239,25 @@ static struct ibv_mr *rxe_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
return &vmr->ibv_mr;
}
+static struct ibv_mr* rxe_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset, size_t length,
+ uint64_t iova, int fd, int access)
+{
+ struct verbs_mr *vmr;
+ int ret;
+
+ vmr = malloc(sizeof (*vmr));
+ if (!vmr)
+ return NULL;
+
+ ret = ibv_cmd_reg_dmabuf_mr(pd, offset, length, iova, fd, access, vmr);
+ if (ret) {
+ free(vmr);
+ return NULL;
+ }
+
+ return &vmr->ibv_mr;
+}
+
static int rxe_dereg_mr(struct verbs_mr *vmr)
{
int ret;
@@ -1706,6 +1725,7 @@ static const struct verbs_context_ops rxe_ctx_ops = {
.alloc_pd = rxe_alloc_pd,
.dealloc_pd = rxe_dealloc_pd,
.reg_mr = rxe_reg_mr,
+ .reg_dmabuf_mr = rxe_reg_dmabuf_mr,
.dereg_mr = rxe_dereg_mr,
.alloc_mw = rxe_alloc_mw,
.dealloc_mw = rxe_dealloc_mw,
--
2.17.1
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