[PATCH for-next 0/3] Allocate MR cleanups

[PATCH for-next 0/3] Allocate MR cleanups

[Gal Pressman]

The allocate MR functionality is limited to kernel users, there is no
reason to pass a redundant udata parameter.
In addition, a small cleanup was added to the MR allocation function to
keep the main flow unindented.

Gal Pressman (3):
  RDMA/core: Check for error instead of success in alloc MR function
  RDMA/core: Remove ib_alloc_mr_user function
  RDMA: Remove the udata parameter from alloc_mr callback

 drivers/infiniband/core/verbs.c               | 36 +++++++++----------
 drivers/infiniband/hw/bnxt_re/ib_verbs.c      |  2 +-
 drivers/infiniband/hw/bnxt_re/ib_verbs.h      |  2 +-
 drivers/infiniband/hw/cxgb4/iw_cxgb4.h        |  2 +-
 drivers/infiniband/hw/cxgb4/mem.c             |  2 +-
 drivers/infiniband/hw/hns/hns_roce_device.h   |  2 +-
 drivers/infiniband/hw/hns/hns_roce_mr.c       |  2 +-
 drivers/infiniband/hw/i40iw/i40iw_verbs.c     |  3 +-
 drivers/infiniband/hw/mlx4/mlx4_ib.h          |  2 +-
 drivers/infiniband/hw/mlx4/mr.c               |  2 +-
 drivers/infiniband/hw/mlx5/mlx5_ib.h          |  2 +-
 drivers/infiniband/hw/mlx5/mr.c               |  2 +-
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c   |  2 +-
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.h   |  2 +-
 drivers/infiniband/hw/qedr/verbs.c            |  2 +-
 drivers/infiniband/hw/qedr/verbs.h            |  2 +-
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c  |  2 +-
 .../infiniband/hw/vmw_pvrdma/pvrdma_verbs.h   |  2 +-
 drivers/infiniband/sw/rdmavt/mr.c             |  2 +-
 drivers/infiniband/sw/rdmavt/mr.h             |  2 +-
 drivers/infiniband/sw/rxe/rxe_verbs.c         |  2 +-
 drivers/infiniband/sw/siw/siw_verbs.c         |  2 +-
 drivers/infiniband/sw/siw/siw_verbs.h         |  2 +-
 include/rdma/ib_verbs.h                       | 12 ++-----
 24 files changed, 43 insertions(+), 50 deletions(-)

-- 
2.27.0

[PATCH for-next 1/3] RDMA/core: Check for error instead of success in alloc MR function

[Gal Pressman]

The common kernel pattern is to check for error, not success.
Flip the if statement accordingly and keep the main flow unindented.

Signed-off-by: Gal Pressman <galpress@amazon.com>
---
 drivers/infiniband/core/verbs.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 7232e6ec2e91..759de1372c59 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2133,18 +2133,19 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
 	}
 
 	mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, udata);
-	if (!IS_ERR(mr)) {
-		mr->device  = pd->device;
-		mr->pd      = pd;
-		mr->dm      = NULL;
-		mr->uobject = NULL;
-		atomic_inc(&pd->usecnt);
-		mr->need_inval = false;
-		mr->res.type = RDMA_RESTRACK_MR;
-		rdma_restrack_kadd(&mr->res);
-		mr->type = mr_type;
-		mr->sig_attrs = NULL;
-	}
+	if (IS_ERR(mr))
+		goto out;
+
+	mr->device  = pd->device;
+	mr->pd      = pd;
+	mr->dm      = NULL;
+	mr->uobject = NULL;
+	atomic_inc(&pd->usecnt);
+	mr->need_inval = false;
+	mr->res.type = RDMA_RESTRACK_MR;
+	rdma_restrack_kadd(&mr->res);
+	mr->type = mr_type;
+	mr->sig_attrs = NULL;
 
 out:
 	trace_mr_alloc(pd, mr_type, max_num_sg, mr);
-- 
2.27.0

Re: [PATCH for-next 1/3] RDMA/core: Check for error instead of success in alloc MR function

[Leon Romanovsky]

On Mon, Jul 06, 2020 at 03:03:41PM +0300, Gal Pressman wrote:
> The common kernel pattern is to check for error, not success.
> Flip the if statement accordingly and keep the main flow unindented.
>
> Signed-off-by: Gal Pressman <galpress@amazon.com>
> ---
>  drivers/infiniband/core/verbs.c | 25 +++++++++++++------------
>  1 file changed, 13 insertions(+), 12 deletions(-)
>

Thanks,
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>

[PATCH for-next 2/3] RDMA/core: Remove ib_alloc_mr_user function

[Gal Pressman]

Allocating an MR flow can only be initiated by kernel users, and not
from userspace. As a result, the udata parameter is always being passed
as NULL. Rename ib_alloc_mr_user function to ib_alloc_mr and remove the
udata parameter.

Signed-off-by: Gal Pressman <galpress@amazon.com>
---
 drivers/infiniband/core/verbs.c | 11 +++++------
 include/rdma/ib_verbs.h         | 10 ++--------
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 759de1372c59..5242155ced47 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2104,11 +2104,10 @@ int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
 EXPORT_SYMBOL(ib_dereg_mr_user);
 
 /**
- * ib_alloc_mr_user() - Allocates a memory region
+ * ib_alloc_mr() - Allocates a memory region
  * @pd:            protection domain associated with the region
  * @mr_type:       memory region type
  * @max_num_sg:    maximum sg entries available for registration.
- * @udata:	   user data or null for kernel objects
  *
  * Notes:
  * Memory registeration page/sg lists must not exceed max_num_sg.
@@ -2116,8 +2115,8 @@ EXPORT_SYMBOL(ib_dereg_mr_user);
  * max_num_sg * used_page_size.
  *
  */
-struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata)
+struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
+			  u32 max_num_sg)
 {
 	struct ib_mr *mr;
 
@@ -2132,7 +2131,7 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
 		goto out;
 	}
 
-	mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, udata);
+	mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, NULL);
 	if (IS_ERR(mr))
 		goto out;
 
@@ -2151,7 +2150,7 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
 	trace_mr_alloc(pd, mr_type, max_num_sg, mr);
 	return mr;
 }
-EXPORT_SYMBOL(ib_alloc_mr_user);
+EXPORT_SYMBOL(ib_alloc_mr);
 
 /**
  * ib_alloc_mr_integrity() - Allocates an integrity memory region
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 1e902a8f1713..3b53fdc975f6 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4268,14 +4268,8 @@ static inline int ib_dereg_mr(struct ib_mr *mr)
 	return ib_dereg_mr_user(mr, NULL);
 }
 
-struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata);
-
-static inline struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
-					enum ib_mr_type mr_type, u32 max_num_sg)
-{
-	return ib_alloc_mr_user(pd, mr_type, max_num_sg, NULL);
-}
+struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
+			  u32 max_num_sg);
 
 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
 				    u32 max_num_data_sg,
-- 
2.27.0

Re: [PATCH for-next 2/3] RDMA/core: Remove ib_alloc_mr_user function

[Leon Romanovsky]

On Mon, Jul 06, 2020 at 03:03:42PM +0300, Gal Pressman wrote:
> Allocating an MR flow can only be initiated by kernel users, and not
> from userspace. As a result, the udata parameter is always being passed
> as NULL. Rename ib_alloc_mr_user function to ib_alloc_mr and remove the
> udata parameter.
>
> Signed-off-by: Gal Pressman <galpress@amazon.com>
> ---
>  drivers/infiniband/core/verbs.c | 11 +++++------
>  include/rdma/ib_verbs.h         | 10 ++--------
>  2 files changed, 7 insertions(+), 14 deletions(-)
>

Thanks,
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>

[PATCH for-next 3/3] RDMA: Remove the udata parameter from alloc_mr callback

[Gal Pressman]

Allocating an MR flow can only be initiated by kernel users, and not
from userspace so a udata parameter is redundant.

Signed-off-by: Gal Pressman <galpress@amazon.com>
---
 drivers/infiniband/core/verbs.c                 | 2 +-
 drivers/infiniband/hw/bnxt_re/ib_verbs.c        | 2 +-
 drivers/infiniband/hw/bnxt_re/ib_verbs.h        | 2 +-
 drivers/infiniband/hw/cxgb4/iw_cxgb4.h          | 2 +-
 drivers/infiniband/hw/cxgb4/mem.c               | 2 +-
 drivers/infiniband/hw/hns/hns_roce_device.h     | 2 +-
 drivers/infiniband/hw/hns/hns_roce_mr.c         | 2 +-
 drivers/infiniband/hw/i40iw/i40iw_verbs.c       | 3 +--
 drivers/infiniband/hw/mlx4/mlx4_ib.h            | 2 +-
 drivers/infiniband/hw/mlx4/mr.c                 | 2 +-
 drivers/infiniband/hw/mlx5/mlx5_ib.h            | 2 +-
 drivers/infiniband/hw/mlx5/mr.c                 | 2 +-
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c     | 2 +-
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.h     | 2 +-
 drivers/infiniband/hw/qedr/verbs.c              | 2 +-
 drivers/infiniband/hw/qedr/verbs.h              | 2 +-
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c    | 2 +-
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h | 2 +-
 drivers/infiniband/sw/rdmavt/mr.c               | 2 +-
 drivers/infiniband/sw/rdmavt/mr.h               | 2 +-
 drivers/infiniband/sw/rxe/rxe_verbs.c           | 2 +-
 drivers/infiniband/sw/siw/siw_verbs.c           | 2 +-
 drivers/infiniband/sw/siw/siw_verbs.h           | 2 +-
 include/rdma/ib_verbs.h                         | 2 +-
 24 files changed, 24 insertions(+), 25 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 5242155ced47..26f1de76da99 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2131,7 +2131,7 @@ struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
 		goto out;
 	}
 
-	mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, NULL);
+	mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg);
 	if (IS_ERR(mr))
 		goto out;
 
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 8b6ad5cddfce..f32c7e85ae05 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -3569,7 +3569,7 @@ int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
 }
 
 struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type type,
-			       u32 max_num_sg, struct ib_udata *udata)
+			       u32 max_num_sg)
 {
 	struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
 	struct bnxt_re_dev *rdev = pd->rdev;
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
index e5fbbeba6d28..b4a06b553b04 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
@@ -201,7 +201,7 @@ struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
 int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
 		      unsigned int *sg_offset);
 struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata);
+			       u32 max_num_sg);
 int bnxt_re_dereg_mr(struct ib_mr *mr, struct ib_udata *udata);
 struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
 			       struct ib_udata *udata);
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
index 27da0705c88a..2b2b009b371a 100644
--- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
+++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
@@ -980,7 +980,7 @@ int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
 void c4iw_qp_add_ref(struct ib_qp *qp);
 void c4iw_qp_rem_ref(struct ib_qp *qp);
 struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			    u32 max_num_sg, struct ib_udata *udata);
+			    u32 max_num_sg);
 int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 		   unsigned int *sg_offset);
 int c4iw_dealloc_mw(struct ib_mw *mw);
diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
index 962dc97a8ff2..ea6fb2c5b1a7 100644
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -691,7 +691,7 @@ int c4iw_dealloc_mw(struct ib_mw *mw)
 }
 
 struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			    u32 max_num_sg, struct ib_udata *udata)
+			    u32 max_num_sg)
 {
 	struct c4iw_dev *rhp;
 	struct c4iw_pd *php;
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index a61f0c4d4dbb..5b946b5bd586 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -1191,7 +1191,7 @@ int hns_roce_rereg_user_mr(struct ib_mr *mr, int flags, u64 start, u64 length,
 			   u64 virt_addr, int mr_access_flags, struct ib_pd *pd,
 			   struct ib_udata *udata);
 struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-				u32 max_num_sg, struct ib_udata *udata);
+				u32 max_num_sg);
 int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 		       unsigned int *sg_offset);
 int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata);
diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
index 4c0bbb12770d..1380cdab5701 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -414,7 +414,7 @@ int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
 }
 
 struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-				u32 max_num_sg, struct ib_udata *udata)
+				u32 max_num_sg)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
 	struct device *dev = hr_dev->dev;
diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index 19af29a48c55..f9ef3ac2f4cd 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -1543,10 +1543,9 @@ static int i40iw_hw_alloc_stag(struct i40iw_device *iwdev, struct i40iw_mr *iwmr
  * @pd: ibpd pointer
  * @mr_type: memory for stag registrion
  * @max_num_sg: man number of pages
- * @udata: user data or NULL for kernel objects
  */
 static struct ib_mr *i40iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-				    u32 max_num_sg, struct ib_udata *udata)
+				    u32 max_num_sg)
 {
 	struct i40iw_pd *iwpd = to_iwpd(pd);
 	struct i40iw_device *iwdev = to_iwdev(pd->device);
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 6f4ea1067095..38e87a700a2a 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -729,7 +729,7 @@ struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type,
 			       struct ib_udata *udata);
 int mlx4_ib_dealloc_mw(struct ib_mw *mw);
 struct ib_mr *mlx4_ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata);
+			       u32 max_num_sg);
 int mlx4_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 		      unsigned int *sg_offset);
 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 7e0b205c05eb..6eecedeff2d3 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -655,7 +655,7 @@ int mlx4_ib_dealloc_mw(struct ib_mw *ibmw)
 }
 
 struct ib_mr *mlx4_ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata)
+			       u32 max_num_sg)
 {
 	struct mlx4_ib_dev *dev = to_mdev(pd->device);
 	struct mlx4_ib_mr *mr;
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index da03d762c6a2..68035a6bb659 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -1205,7 +1205,7 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
 			  struct ib_pd *pd, struct ib_udata *udata);
 int mlx5_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata);
 struct ib_mr *mlx5_ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata);
+			       u32 max_num_sg);
 struct ib_mr *mlx5_ib_alloc_mr_integrity(struct ib_pd *pd,
 					 u32 max_num_sg,
 					 u32 max_num_meta_sg);
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 44683073be0c..3e6f2f9c6655 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -1961,7 +1961,7 @@ static struct ib_mr *__mlx5_ib_alloc_mr(struct ib_pd *pd,
 }
 
 struct ib_mr *mlx5_ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			       u32 max_num_sg, struct ib_udata *udata)
+			       u32 max_num_sg)
 {
 	return __mlx5_ib_alloc_mr(pd, mr_type, max_num_sg, 0);
 }
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index d11c74390a12..6cdbec13756a 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -2901,7 +2901,7 @@ int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
 }
 
 struct ib_mr *ocrdma_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
-			      u32 max_num_sg, struct ib_udata *udata)
+			      u32 max_num_sg)
 {
 	int status;
 	struct ocrdma_mr *mr;
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
index 3a5010881be5..df8e3b923a44 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
@@ -101,7 +101,7 @@ struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *, int acc);
 struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *, u64 start, u64 length,
 				 u64 virt, int acc, struct ib_udata *);
 struct ib_mr *ocrdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			      u32 max_num_sg, struct ib_udata *udata);
+			      u32 max_num_sg);
 int ocrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 		     unsigned int *sg_offset);
 
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 9b9e80266367..3d7d5617818f 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -3003,7 +3003,7 @@ static struct qedr_mr *__qedr_alloc_mr(struct ib_pd *ibpd,
 }
 
 struct ib_mr *qedr_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
-			    u32 max_num_sg, struct ib_udata *udata)
+			    u32 max_num_sg)
 {
 	struct qedr_mr *mr;
 
diff --git a/drivers/infiniband/hw/qedr/verbs.h b/drivers/infiniband/hw/qedr/verbs.h
index 5e02387e068d..39dd6286ba39 100644
--- a/drivers/infiniband/hw/qedr/verbs.h
+++ b/drivers/infiniband/hw/qedr/verbs.h
@@ -84,7 +84,7 @@ int qedr_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 		   int sg_nents, unsigned int *sg_offset);
 
 struct ib_mr *qedr_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			    u32 max_num_sg, struct ib_udata *udata);
+			    u32 max_num_sg);
 int qedr_poll_cq(struct ib_cq *, int num_entries, struct ib_wc *wc);
 int qedr_post_send(struct ib_qp *, const struct ib_send_wr *,
 		   const struct ib_send_wr **bad_wr);
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c
index b039f1f00e05..77a010e68208 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c
@@ -202,7 +202,7 @@ struct ib_mr *pvrdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
  * @return: ib_mr pointer on success, otherwise returns an errno.
  */
 struct ib_mr *pvrdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			      u32 max_num_sg, struct ib_udata *udata)
+			      u32 max_num_sg)
 {
 	struct pvrdma_dev *dev = to_vdev(pd->device);
 	struct pvrdma_user_mr *mr;
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
index 267702226f10..699b20849a7e 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
@@ -406,7 +406,7 @@ struct ib_mr *pvrdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 				 struct ib_udata *udata);
 int pvrdma_dereg_mr(struct ib_mr *mr, struct ib_udata *udata);
 struct ib_mr *pvrdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			      u32 max_num_sg, struct ib_udata *udata);
+			      u32 max_num_sg);
 int pvrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 		     int sg_nents, unsigned int *sg_offset);
 int pvrdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
diff --git a/drivers/infiniband/sw/rdmavt/mr.c b/drivers/infiniband/sw/rdmavt/mr.c
index 60864e5ca7cb..2f7c25fea44a 100644
--- a/drivers/infiniband/sw/rdmavt/mr.c
+++ b/drivers/infiniband/sw/rdmavt/mr.c
@@ -576,7 +576,7 @@ int rvt_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
  * Return: the memory region on success, otherwise return an errno.
  */
 struct ib_mr *rvt_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			   u32 max_num_sg, struct ib_udata *udata)
+			   u32 max_num_sg)
 {
 	struct rvt_mr *mr;
 
diff --git a/drivers/infiniband/sw/rdmavt/mr.h b/drivers/infiniband/sw/rdmavt/mr.h
index 780fc63af98b..b3aba359401b 100644
--- a/drivers/infiniband/sw/rdmavt/mr.h
+++ b/drivers/infiniband/sw/rdmavt/mr.h
@@ -71,7 +71,7 @@ struct ib_mr *rvt_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 			      struct ib_udata *udata);
 int rvt_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata);
 struct ib_mr *rvt_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			   u32 max_num_sg, struct ib_udata *udata);
+			   u32 max_num_sg);
 int rvt_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 		  int sg_nents, unsigned int *sg_offset);
 
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index b8a22af724e8..0472df52d36d 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -975,7 +975,7 @@ static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
 }
 
 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
-				  u32 max_num_sg, struct ib_udata *udata)
+				  u32 max_num_sg)
 {
 	struct rxe_dev *rxe = to_rdev(ibpd->device);
 	struct rxe_pd *pd = to_rpd(ibpd);
diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c
index 987e2ba05dbc..0d509f7a10a6 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.c
+++ b/drivers/infiniband/sw/siw/siw_verbs.c
@@ -1373,7 +1373,7 @@ struct ib_mr *siw_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
 }
 
 struct ib_mr *siw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
-			   u32 max_sge, struct ib_udata *udata)
+			   u32 max_sge)
 {
 	struct siw_device *sdev = to_siw_dev(pd->device);
 	struct siw_mr *mr = NULL;
diff --git a/drivers/infiniband/sw/siw/siw_verbs.h b/drivers/infiniband/sw/siw/siw_verbs.h
index 1a731989fad6..9335c48c01de 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.h
+++ b/drivers/infiniband/sw/siw/siw_verbs.h
@@ -69,7 +69,7 @@ int siw_req_notify_cq(struct ib_cq *base_cq, enum ib_cq_notify_flags flags);
 struct ib_mr *siw_reg_user_mr(struct ib_pd *base_pd, u64 start, u64 len,
 			      u64 rnic_va, int rights, struct ib_udata *udata);
 struct ib_mr *siw_alloc_mr(struct ib_pd *base_pd, enum ib_mr_type mr_type,
-			   u32 max_sge, struct ib_udata *udata);
+			   u32 max_sge);
 struct ib_mr *siw_get_dma_mr(struct ib_pd *base_pd, int rights);
 int siw_map_mr_sg(struct ib_mr *base_mr, struct scatterlist *sl, int num_sle,
 		  unsigned int *sg_off);
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 3b53fdc975f6..f80e60fe97ea 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2477,7 +2477,7 @@ struct ib_device_ops {
 			     struct ib_pd *pd, struct ib_udata *udata);
 	int (*dereg_mr)(struct ib_mr *mr, struct ib_udata *udata);
 	struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type,
-				  u32 max_num_sg, struct ib_udata *udata);
+				  u32 max_num_sg);
 	struct ib_mr *(*alloc_mr_integrity)(struct ib_pd *pd,
 					    u32 max_num_data_sg,
 					    u32 max_num_meta_sg);
-- 
2.27.0

Re: [PATCH for-next 3/3] RDMA: Remove the udata parameter from alloc_mr callback

[Leon Romanovsky]

On Mon, Jul 06, 2020 at 03:03:43PM +0300, Gal Pressman wrote:
> Allocating an MR flow can only be initiated by kernel users, and not
> from userspace so a udata parameter is redundant.
>
> Signed-off-by: Gal Pressman <galpress@amazon.com>
> ---
>  drivers/infiniband/core/verbs.c                 | 2 +-
>  drivers/infiniband/hw/bnxt_re/ib_verbs.c        | 2 +-
>  drivers/infiniband/hw/bnxt_re/ib_verbs.h        | 2 +-
>  drivers/infiniband/hw/cxgb4/iw_cxgb4.h          | 2 +-
>  drivers/infiniband/hw/cxgb4/mem.c               | 2 +-
>  drivers/infiniband/hw/hns/hns_roce_device.h     | 2 +-
>  drivers/infiniband/hw/hns/hns_roce_mr.c         | 2 +-
>  drivers/infiniband/hw/i40iw/i40iw_verbs.c       | 3 +--
>  drivers/infiniband/hw/mlx4/mlx4_ib.h            | 2 +-
>  drivers/infiniband/hw/mlx4/mr.c                 | 2 +-
>  drivers/infiniband/hw/mlx5/mlx5_ib.h            | 2 +-
>  drivers/infiniband/hw/mlx5/mr.c                 | 2 +-
>  drivers/infiniband/hw/ocrdma/ocrdma_verbs.c     | 2 +-
>  drivers/infiniband/hw/ocrdma/ocrdma_verbs.h     | 2 +-
>  drivers/infiniband/hw/qedr/verbs.c              | 2 +-
>  drivers/infiniband/hw/qedr/verbs.h              | 2 +-
>  drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c    | 2 +-
>  drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h | 2 +-
>  drivers/infiniband/sw/rdmavt/mr.c               | 2 +-
>  drivers/infiniband/sw/rdmavt/mr.h               | 2 +-
>  drivers/infiniband/sw/rxe/rxe_verbs.c           | 2 +-
>  drivers/infiniband/sw/siw/siw_verbs.c           | 2 +-
>  drivers/infiniband/sw/siw/siw_verbs.h           | 2 +-
>  include/rdma/ib_verbs.h                         | 2 +-
>  24 files changed, 24 insertions(+), 25 deletions(-)

Thanks,
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>

Re: [PATCH for-next 0/3] Allocate MR cleanups

[Jason Gunthorpe]

On Mon, Jul 06, 2020 at 03:03:40PM +0300, Gal Pressman wrote:
> The allocate MR functionality is limited to kernel users, there is no
> reason to pass a redundant udata parameter.
> In addition, a small cleanup was added to the MR allocation function to
> keep the main flow unindented.
> 
> Gal Pressman (3):
>   RDMA/core: Check for error instead of success in alloc MR function
>   RDMA/core: Remove ib_alloc_mr_user function
>   RDMA: Remove the udata parameter from alloc_mr callback

Applied to for-next, thanks

Jason