* [PATCH for-next 1/3] RDMA/erdma: Rename get/put_mtt_entries to erdma_mem_init/uninit
2026-05-07 5:34 [PATCH for-next 0/3] RDMA/erdma: Add DMA-BUF memory registration Boshi Yu
@ 2026-05-07 5:34 ` Boshi Yu
2026-05-07 5:34 ` [PATCH for-next 2/3] RDMA/erdma: Introduce struct erdma_mem_init_attr Boshi Yu
2026-05-07 5:34 ` [PATCH for-next 3/3] RDMA/erdma: Implement erdma_reg_user_mr_dmabuf Boshi Yu
2 siblings, 0 replies; 4+ messages in thread
From: Boshi Yu @ 2026-05-07 5:34 UTC (permalink / raw)
To: jgg, leon; +Cc: linux-rdma, chengyou, kaishen
The get_mtt_entries() interface actually initializes the struct
erdma_mem. Rename the get_mtt_entries/put_mtt_entries to
erdma_mem_init/erdma_mem_uninit, respectively.
Reviewed-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Boshi Yu <boshiyu@linux.alibaba.com>
---
drivers/infiniband/hw/erdma/erdma_verbs.c | 60 +++++++++++------------
1 file changed, 30 insertions(+), 30 deletions(-)
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c
index 5523b4e151e1..a418a3c92754 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.c
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -823,9 +823,9 @@ static void erdma_destroy_mtt(struct erdma_dev *dev, struct erdma_mtt *mtt)
}
}
-static int get_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem,
- u64 start, u64 len, int access, u64 virt,
- unsigned long req_page_size, bool force_continuous)
+static int erdma_mem_init(struct erdma_dev *dev, struct erdma_mem *mem,
+ u64 start, u64 len, int access, u64 virt,
+ unsigned long req_page_size, bool force_continuous)
{
int ret = 0;
@@ -862,7 +862,7 @@ static int get_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem,
return ret;
}
-static void put_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem)
+static void erdma_mem_uninit(struct erdma_dev *dev, struct erdma_mem *mem)
{
if (mem->mtt)
erdma_destroy_mtt(dev, mem->mtt);
@@ -946,45 +946,45 @@ static int init_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx,
qp->attrs.rq_size * RQE_SIZE))
return -EINVAL;
- ret = get_mtt_entries(qp->dev, &qp->user_qp.sq_mem, va,
- qp->attrs.sq_size << SQEBB_SHIFT, 0, va,
- (SZ_1M - SZ_4K), true);
+ ret = erdma_mem_init(qp->dev, &qp->user_qp.sq_mem, va,
+ qp->attrs.sq_size << SQEBB_SHIFT, 0, va,
+ (SZ_1M - SZ_4K), true);
if (ret)
return ret;
rq_offset = ALIGN(qp->attrs.sq_size << SQEBB_SHIFT, ERDMA_HW_PAGE_SIZE);
qp->user_qp.rq_offset = rq_offset;
- ret = get_mtt_entries(qp->dev, &qp->user_qp.rq_mem, va + rq_offset,
+ ret = erdma_mem_init(qp->dev, &qp->user_qp.rq_mem, va + rq_offset,
qp->attrs.rq_size << RQE_SHIFT, 0, va + rq_offset,
(SZ_1M - SZ_4K), true);
if (ret)
- goto put_sq_mtt;
+ goto uninit_sq_mem;
ret = erdma_map_user_dbrecords(uctx, dbrec_va,
&qp->user_qp.user_dbr_page,
&dbrec_dma);
if (ret)
- goto put_rq_mtt;
+ goto uninit_rq_mem;
qp->user_qp.sq_dbrec_dma = dbrec_dma;
qp->user_qp.rq_dbrec_dma = dbrec_dma + ERDMA_DB_SIZE;
return 0;
-put_rq_mtt:
- put_mtt_entries(qp->dev, &qp->user_qp.rq_mem);
+uninit_rq_mem:
+ erdma_mem_uninit(qp->dev, &qp->user_qp.rq_mem);
-put_sq_mtt:
- put_mtt_entries(qp->dev, &qp->user_qp.sq_mem);
+uninit_sq_mem:
+ erdma_mem_uninit(qp->dev, &qp->user_qp.sq_mem);
return ret;
}
static void free_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx)
{
- put_mtt_entries(qp->dev, &qp->user_qp.sq_mem);
- put_mtt_entries(qp->dev, &qp->user_qp.rq_mem);
+ erdma_mem_uninit(qp->dev, &qp->user_qp.sq_mem);
+ erdma_mem_uninit(qp->dev, &qp->user_qp.rq_mem);
erdma_unmap_user_dbrecords(uctx, &qp->user_qp.user_dbr_page);
}
@@ -1248,14 +1248,14 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
if (!mr)
return ERR_PTR(-ENOMEM);
- ret = get_mtt_entries(dev, &mr->mem, start, len, access, virt,
- SZ_2G - SZ_4K, false);
+ ret = erdma_mem_init(dev, &mr->mem, start, len, access, virt,
+ SZ_2G - SZ_4K, false);
if (ret)
goto err_out_free;
ret = erdma_create_stag(dev, &stag);
if (ret)
- goto err_out_put_mtt;
+ goto err_uninit_mem;
mr->ibmr.lkey = mr->ibmr.rkey = stag;
mr->ibmr.pd = ibpd;
@@ -1275,8 +1275,8 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX],
mr->ibmr.lkey >> 8);
-err_out_put_mtt:
- put_mtt_entries(dev, &mr->mem);
+err_uninit_mem:
+ erdma_mem_uninit(dev, &mr->mem);
err_out_free:
kfree(mr);
@@ -1306,7 +1306,7 @@ int erdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX], ibmr->lkey >> 8);
- put_mtt_entries(dev, &mr->mem);
+ erdma_mem_uninit(dev, &mr->mem);
kfree(mr);
return 0;
@@ -1337,7 +1337,7 @@ int erdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
cq->kern_cq.dbrec_dma);
} else {
erdma_unmap_user_dbrecords(ctx, &cq->user_cq.user_dbr_page);
- put_mtt_entries(dev, &cq->user_cq.qbuf_mem);
+ erdma_mem_uninit(dev, &cq->user_cq.qbuf_mem);
}
xa_erase(&dev->cq_xa, cq->cqn);
@@ -1384,8 +1384,8 @@ int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
if (rdma_is_kernel_res(&qp->ibqp.res)) {
free_kernel_qp(qp);
} else {
- put_mtt_entries(dev, &qp->user_qp.sq_mem);
- put_mtt_entries(dev, &qp->user_qp.rq_mem);
+ erdma_mem_uninit(dev, &qp->user_qp.sq_mem);
+ erdma_mem_uninit(dev, &qp->user_qp.rq_mem);
erdma_unmap_user_dbrecords(ctx, &qp->user_qp.user_dbr_page);
}
@@ -1907,9 +1907,9 @@ static int erdma_init_user_cq(struct erdma_ucontext *ctx, struct erdma_cq *cq,
int ret;
struct erdma_dev *dev = to_edev(cq->ibcq.device);
- ret = get_mtt_entries(dev, &cq->user_cq.qbuf_mem, ureq->qbuf_va,
- ureq->qbuf_len, 0, ureq->qbuf_va, SZ_64M - SZ_4K,
- true);
+ ret = erdma_mem_init(dev, &cq->user_cq.qbuf_mem, ureq->qbuf_va,
+ ureq->qbuf_len, 0, ureq->qbuf_va, SZ_64M - SZ_4K,
+ true);
if (ret)
return ret;
@@ -1917,7 +1917,7 @@ static int erdma_init_user_cq(struct erdma_ucontext *ctx, struct erdma_cq *cq,
&cq->user_cq.user_dbr_page,
&cq->user_cq.dbrec_dma);
if (ret)
- put_mtt_entries(dev, &cq->user_cq.qbuf_mem);
+ erdma_mem_uninit(dev, &cq->user_cq.qbuf_mem);
return ret;
}
@@ -2009,7 +2009,7 @@ int erdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
err_free_res:
if (!rdma_is_kernel_res(&ibcq->res)) {
erdma_unmap_user_dbrecords(ctx, &cq->user_cq.user_dbr_page);
- put_mtt_entries(dev, &cq->user_cq.qbuf_mem);
+ erdma_mem_uninit(dev, &cq->user_cq.qbuf_mem);
} else {
dma_free_coherent(&dev->pdev->dev, depth << CQE_SHIFT,
cq->kern_cq.qbuf, cq->kern_cq.qbuf_dma_addr);
--
2.46.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH for-next 2/3] RDMA/erdma: Introduce struct erdma_mem_init_attr
2026-05-07 5:34 [PATCH for-next 0/3] RDMA/erdma: Add DMA-BUF memory registration Boshi Yu
2026-05-07 5:34 ` [PATCH for-next 1/3] RDMA/erdma: Rename get/put_mtt_entries to erdma_mem_init/uninit Boshi Yu
@ 2026-05-07 5:34 ` Boshi Yu
2026-05-07 5:34 ` [PATCH for-next 3/3] RDMA/erdma: Implement erdma_reg_user_mr_dmabuf Boshi Yu
2 siblings, 0 replies; 4+ messages in thread
From: Boshi Yu @ 2026-05-07 5:34 UTC (permalink / raw)
To: jgg, leon; +Cc: linux-rdma, chengyou, kaishen
Pass struct erdma_mem_init_attr to the erdma_mem_init() interface.
Reviewed-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Boshi Yu <boshiyu@linux.alibaba.com>
---
drivers/infiniband/hw/erdma/erdma_verbs.c | 57 ++++++++++++++---------
drivers/infiniband/hw/erdma/erdma_verbs.h | 13 ++++++
2 files changed, 49 insertions(+), 21 deletions(-)
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c
index a418a3c92754..59a2b8464a6f 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.c
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -824,26 +824,27 @@ static void erdma_destroy_mtt(struct erdma_dev *dev, struct erdma_mtt *mtt)
}
static int erdma_mem_init(struct erdma_dev *dev, struct erdma_mem *mem,
- u64 start, u64 len, int access, u64 virt,
- unsigned long req_page_size, bool force_continuous)
+ struct erdma_mem_init_attr *attr)
{
int ret = 0;
- mem->umem = ib_umem_get(&dev->ibdev, start, len, access);
+ mem->umem =
+ ib_umem_get(&dev->ibdev, attr->start, attr->len, attr->access);
if (IS_ERR(mem->umem)) {
ret = PTR_ERR(mem->umem);
mem->umem = NULL;
return ret;
}
- mem->va = virt;
- mem->len = len;
- mem->page_size = ib_umem_find_best_pgsz(mem->umem, req_page_size, virt);
- mem->page_offset = start & (mem->page_size - 1);
+ mem->va = attr->virt;
+ mem->len = attr->len;
+ mem->page_size = ib_umem_find_best_pgsz(mem->umem, attr->req_page_size,
+ attr->virt);
+ mem->page_offset = attr->start & (mem->page_size - 1);
mem->mtt_nents = ib_umem_num_dma_blocks(mem->umem, mem->page_size);
mem->page_cnt = mem->mtt_nents;
mem->mtt = erdma_create_mtt(dev, MTT_SIZE(mem->page_cnt),
- force_continuous);
+ attr->flags & ERDMA_MEM_FLAG_MTT_PHYS_CONT);
if (IS_ERR(mem->mtt)) {
ret = PTR_ERR(mem->mtt);
goto error_ret;
@@ -938,6 +939,7 @@ erdma_unmap_user_dbrecords(struct erdma_ucontext *ctx,
static int init_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx,
u64 va, u32 len, u64 dbrec_va)
{
+ struct erdma_mem_init_attr attr = {};
dma_addr_t dbrec_dma;
u32 rq_offset;
int ret;
@@ -946,18 +948,22 @@ static int init_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx,
qp->attrs.rq_size * RQE_SIZE))
return -EINVAL;
- ret = erdma_mem_init(qp->dev, &qp->user_qp.sq_mem, va,
- qp->attrs.sq_size << SQEBB_SHIFT, 0, va,
- (SZ_1M - SZ_4K), true);
+ attr.virt = va;
+ attr.start = va;
+ attr.req_page_size = SZ_1M - SZ_4K;
+ attr.len = qp->attrs.sq_size << SQEBB_SHIFT;
+ attr.flags = ERDMA_MEM_FLAG_MTT_PHYS_CONT;
+ ret = erdma_mem_init(qp->dev, &qp->user_qp.sq_mem, &attr);
if (ret)
return ret;
rq_offset = ALIGN(qp->attrs.sq_size << SQEBB_SHIFT, ERDMA_HW_PAGE_SIZE);
qp->user_qp.rq_offset = rq_offset;
- ret = erdma_mem_init(qp->dev, &qp->user_qp.rq_mem, va + rq_offset,
- qp->attrs.rq_size << RQE_SHIFT, 0, va + rq_offset,
- (SZ_1M - SZ_4K), true);
+ attr.virt = va + rq_offset;
+ attr.start = va + rq_offset;
+ attr.len = qp->attrs.rq_size << RQE_SHIFT;
+ ret = erdma_mem_init(qp->dev, &qp->user_qp.rq_mem, &attr);
if (ret)
goto uninit_sq_mem;
@@ -1233,8 +1239,9 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
u64 virt, int access, struct ib_dmah *dmah,
struct ib_udata *udata)
{
- struct erdma_mr *mr = NULL;
struct erdma_dev *dev = to_edev(ibpd->device);
+ struct erdma_mem_init_attr attr = {};
+ struct erdma_mr *mr = NULL;
u32 stag;
int ret;
@@ -1248,8 +1255,12 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
if (!mr)
return ERR_PTR(-ENOMEM);
- ret = erdma_mem_init(dev, &mr->mem, start, len, access, virt,
- SZ_2G - SZ_4K, false);
+ attr.len = len;
+ attr.virt = virt;
+ attr.start = start;
+ attr.access = access;
+ attr.req_page_size = SZ_2G - SZ_4K;
+ ret = erdma_mem_init(dev, &mr->mem, &attr);
if (ret)
goto err_out_free;
@@ -1904,12 +1915,16 @@ int erdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
static int erdma_init_user_cq(struct erdma_ucontext *ctx, struct erdma_cq *cq,
struct erdma_ureq_create_cq *ureq)
{
- int ret;
struct erdma_dev *dev = to_edev(cq->ibcq.device);
+ struct erdma_mem_init_attr attr = {};
+ int ret;
- ret = erdma_mem_init(dev, &cq->user_cq.qbuf_mem, ureq->qbuf_va,
- ureq->qbuf_len, 0, ureq->qbuf_va, SZ_64M - SZ_4K,
- true);
+ attr.len = ureq->qbuf_len;
+ attr.virt = ureq->qbuf_va;
+ attr.start = ureq->qbuf_va;
+ attr.req_page_size = SZ_64M - SZ_4K;
+ attr.flags = ERDMA_MEM_FLAG_MTT_PHYS_CONT;
+ ret = erdma_mem_init(dev, &cq->user_cq.qbuf_mem, &attr);
if (ret)
return ret;
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h b/drivers/infiniband/hw/erdma/erdma_verbs.h
index 7d8d3fe501d5..79b3a90b03e7 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.h
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
@@ -108,6 +108,19 @@ struct erdma_mtt {
struct erdma_mtt *low_level;
};
+enum erdma_mem_flags {
+ ERDMA_MEM_FLAG_MTT_PHYS_CONT = (1 << 0),
+};
+
+struct erdma_mem_init_attr {
+ u64 start;
+ u64 virt;
+ u64 len;
+ unsigned long req_page_size;
+ int access;
+ u32 flags;
+};
+
struct erdma_mem {
struct ib_umem *umem;
struct erdma_mtt *mtt;
--
2.46.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH for-next 3/3] RDMA/erdma: Implement erdma_reg_user_mr_dmabuf
2026-05-07 5:34 [PATCH for-next 0/3] RDMA/erdma: Add DMA-BUF memory registration Boshi Yu
2026-05-07 5:34 ` [PATCH for-next 1/3] RDMA/erdma: Rename get/put_mtt_entries to erdma_mem_init/uninit Boshi Yu
2026-05-07 5:34 ` [PATCH for-next 2/3] RDMA/erdma: Introduce struct erdma_mem_init_attr Boshi Yu
@ 2026-05-07 5:34 ` Boshi Yu
2 siblings, 0 replies; 4+ messages in thread
From: Boshi Yu @ 2026-05-07 5:34 UTC (permalink / raw)
To: jgg, leon; +Cc: linux-rdma, chengyou, kaishen
Support DMA-BUF based user memory registration by adding the
erdma_reg_user_mr_dmabuf() callback. We refactor the existing
erdma_reg_user_mr() into a common _erdma_reg_user_mr() function
that handles both regular and DMA-BUF memory registration.
Reviewed-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Boshi Yu <boshiyu@linux.alibaba.com>
---
drivers/infiniband/hw/erdma/erdma_main.c | 1 +
drivers/infiniband/hw/erdma/erdma_verbs.c | 55 ++++++++++++++++++-----
drivers/infiniband/hw/erdma/erdma_verbs.h | 6 +++
3 files changed, 51 insertions(+), 11 deletions(-)
diff --git a/drivers/infiniband/hw/erdma/erdma_main.c b/drivers/infiniband/hw/erdma/erdma_main.c
index 7e87a815e853..6e4860428e5b 100644
--- a/drivers/infiniband/hw/erdma/erdma_main.c
+++ b/drivers/infiniband/hw/erdma/erdma_main.c
@@ -526,6 +526,7 @@ static const struct ib_device_ops erdma_device_ops = {
.query_qp = erdma_query_qp,
.req_notify_cq = erdma_req_notify_cq,
.reg_user_mr = erdma_reg_user_mr,
+ .reg_user_mr_dmabuf = erdma_reg_user_mr_dmabuf,
.modify_qp = erdma_modify_qp,
INIT_RDMA_OBJ_SIZE(ib_cq, erdma_cq, ibcq),
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c
index 59a2b8464a6f..d75ce1e4a3ab 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.c
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -826,14 +826,27 @@ static void erdma_destroy_mtt(struct erdma_dev *dev, struct erdma_mtt *mtt)
static int erdma_mem_init(struct erdma_dev *dev, struct erdma_mem *mem,
struct erdma_mem_init_attr *attr)
{
+ struct ib_umem_dmabuf *umem_dmabuf;
int ret = 0;
- mem->umem =
- ib_umem_get(&dev->ibdev, attr->start, attr->len, attr->access);
- if (IS_ERR(mem->umem)) {
- ret = PTR_ERR(mem->umem);
- mem->umem = NULL;
- return ret;
+ if (attr->flags & ERDMA_MEM_FLAG_DMABUF) {
+ umem_dmabuf = ib_umem_dmabuf_get_pinned(&dev->ibdev,
+ attr->start, attr->len,
+ attr->fd, attr->access);
+ if (IS_ERR(umem_dmabuf)) {
+ ret = PTR_ERR(umem_dmabuf);
+ mem->umem = NULL;
+ return ret;
+ }
+ mem->umem = &umem_dmabuf->umem;
+ } else {
+ mem->umem = ib_umem_get(&dev->ibdev, attr->start, attr->len,
+ attr->access);
+ if (IS_ERR(mem->umem)) {
+ ret = PTR_ERR(mem->umem);
+ mem->umem = NULL;
+ return ret;
+ }
}
mem->va = attr->virt;
@@ -1235,9 +1248,10 @@ int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
return num;
}
-struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
- u64 virt, int access, struct ib_dmah *dmah,
- struct ib_udata *udata)
+static struct ib_mr *
+_erdma_reg_user_mr(struct ib_pd *ibpd, struct ib_udata *udata,
+ struct ib_dmah *dmah, u64 start, u64 len, u64 virt,
+ int access, int fd, bool dmabuf)
{
struct erdma_dev *dev = to_edev(ibpd->device);
struct erdma_mem_init_attr attr = {};
@@ -1255,6 +1269,10 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
if (!mr)
return ERR_PTR(-ENOMEM);
+ if (dmabuf)
+ attr.flags |= ERDMA_MEM_FLAG_DMABUF;
+
+ attr.fd = fd;
attr.len = len;
attr.virt = virt;
attr.start = start;
@@ -1270,8 +1288,6 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
mr->ibmr.lkey = mr->ibmr.rkey = stag;
mr->ibmr.pd = ibpd;
- mr->mem.va = virt;
- mr->mem.len = len;
mr->access = ERDMA_MR_ACC_LR | to_erdma_access_flags(access);
mr->valid = 1;
mr->type = ERDMA_MR_TYPE_NORMAL;
@@ -1295,6 +1311,23 @@ struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
return ERR_PTR(ret);
}
+struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
+ u64 virt, int access, struct ib_dmah *dmah,
+ struct ib_udata *udata)
+{
+ return _erdma_reg_user_mr(ibpd, udata, dmah, start, len, virt, access,
+ 0, false);
+}
+
+struct ib_mr *erdma_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start, u64 len,
+ u64 virt, int fd, int access,
+ struct ib_dmah *dmah,
+ struct uverbs_attr_bundle *attrs)
+{
+ return _erdma_reg_user_mr(ibpd, &attrs->driver_udata, dmah, start, len,
+ virt, access, fd, true);
+}
+
int erdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
{
struct erdma_mr *mr;
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h b/drivers/infiniband/hw/erdma/erdma_verbs.h
index 79b3a90b03e7..15bdad8b14ce 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.h
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
@@ -110,6 +110,7 @@ struct erdma_mtt {
enum erdma_mem_flags {
ERDMA_MEM_FLAG_MTT_PHYS_CONT = (1 << 0),
+ ERDMA_MEM_FLAG_DMABUF = (1 << 1),
};
struct erdma_mem_init_attr {
@@ -118,6 +119,7 @@ struct erdma_mem_init_attr {
u64 len;
unsigned long req_page_size;
int access;
+ int fd;
u32 flags;
};
@@ -467,6 +469,10 @@ int erdma_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
u64 virt, int access, struct ib_dmah *dmah,
struct ib_udata *udata);
+struct ib_mr *erdma_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start, u64 len,
+ u64 virt, int fd, int access,
+ struct ib_dmah *dmah,
+ struct uverbs_attr_bundle *attrs);
struct ib_mr *erdma_get_dma_mr(struct ib_pd *ibpd, int rights);
int erdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *data);
int erdma_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma);
--
2.46.0
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