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From: Shiraz Saleem <shirazsaleem@microsoft.com>
Date: Thu, 6 Feb 2025 16:05:42 -0600
Subject: providers/mana: Add dma-buf support
Add support for dma-buf MR verb API in mana.
Signed-off-by: Shiraz Saleem <shirazsaleem@microsoft.com>
Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
Origin: upstream, https://github.com/linux-rdma/rdma-core/pull/1557
---
providers/mana/mana.c | 24 ++++++++++++++++++++++++
providers/mana/mana.h | 4 ++++
2 files changed, 28 insertions(+)
diff --git a/providers/mana/mana.c b/providers/mana/mana.c
index 581725f..9f8072d 100644
--- a/providers/mana/mana.c
+++ b/providers/mana/mana.c
@@ -158,6 +158,29 @@ int mana_dealloc_pd(struct ibv_pd *ibpd)
return 0;
}
+struct ibv_mr *mana_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 = calloc(1, sizeof(*vmr));
+ if (!vmr)
+ return NULL;
+
+ ret = ibv_cmd_reg_dmabuf_mr(pd, offset, length, iova, fd, access, vmr, NULL);
+ if (ret) {
+ verbs_err(verbs_get_ctx(pd->context),
+ "Failed to register dma-buf MR\n");
+ errno = ret;
+ free(vmr);
+ return NULL;
+ }
+
+ return &vmr->ibv_mr;
+}
+
struct ibv_mr *mana_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
uint64_t hca_va, int access)
{
@@ -257,6 +280,7 @@ static const struct verbs_context_ops mana_ctx_ops = {
.post_send = mana_post_send,
.query_device_ex = mana_query_device_ex,
.query_port = mana_query_port,
+ .reg_dmabuf_mr = mana_reg_dmabuf_mr,
.reg_mr = mana_reg_mr,
.req_notify_cq = mana_arm_cq,
};
diff --git a/providers/mana/mana.h b/providers/mana/mana.h
index 7d31cae..2800bb2 100644
--- a/providers/mana/mana.h
+++ b/providers/mana/mana.h
@@ -198,6 +198,10 @@ mana_alloc_parent_domain(struct ibv_context *context,
int mana_dealloc_pd(struct ibv_pd *pd);
+struct ibv_mr *mana_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset,
+ size_t length, uint64_t iova, int fd,
+ int access);
+
struct ibv_mr *mana_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
uint64_t hca_va, int access);
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