linux-kernel - [PATCH for-next v4 3/8] RDMA/rxe: Make MR functions accessible from other rxe source code

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Message-Id: <2f4b8ab05f4d8495e6a190fb54e087b25c34e029.1681882651.git.matsuda-daisuke@fujitsu.com>
Date:   Wed, 19 Apr 2023 14:51:55 +0900
From:   Daisuke Matsuda <matsuda-daisuke@...itsu.com>
To:     linux-rdma@...r.kernel.org, leonro@...dia.com, jgg@...dia.com,
        zyjzyj2000@...il.com
Cc:     linux-kernel@...r.kernel.org, rpearsonhpe@...il.com,
        yangx.jy@...itsu.com, lizhijian@...itsu.com,
        Daisuke Matsuda <matsuda-daisuke@...itsu.com>
Subject: [PATCH for-next v4 3/8] RDMA/rxe: Make MR functions accessible from other rxe source code

Some functions in rxe_mr.c are going to be used in rxe_odp.c, which is to
be created in the subsequent patch. List the declarations of the functions
in rxe_loc.h.

Signed-off-by: Daisuke Matsuda <matsuda-daisuke@...itsu.com>
---
 drivers/infiniband/sw/rxe/rxe_loc.h | 14 ++++++++++++++
 drivers/infiniband/sw/rxe/rxe_mr.c  | 18 ++++--------------
 2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h
index bf28ac13c3f5..3476726425d9 100644
--- a/drivers/infiniband/sw/rxe/rxe_loc.h
+++ b/drivers/infiniband/sw/rxe/rxe_loc.h
@@ -60,7 +60,9 @@ int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
 
 /* rxe_mr.c */
 u8 rxe_get_next_key(u32 last_key);
+void rxe_mr_init(int access, struct rxe_mr *mr);
 void rxe_mr_init_dma(int access, struct rxe_mr *mr);
+int rxe_mr_fill_pages_from_sgt(struct rxe_mr *mr, struct sg_table *sgt);
 int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
 		     int access, struct rxe_mr *mr);
 int rxe_mr_init_fast(int max_pages, struct rxe_mr *mr);
@@ -71,6 +73,8 @@ int copy_data(struct rxe_pd *pd, int access, struct rxe_dma_info *dma,
 	      void *addr, int length, enum rxe_mr_copy_dir dir);
 int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 		  int sg_nents, unsigned int *sg_offset);
+int rxe_mr_copy_xarray(struct rxe_mr *mr, u64 iova, void *addr,
+		       unsigned int length, enum rxe_mr_copy_dir dir);
 int rxe_mr_do_atomic_op(struct rxe_mr *mr, u64 iova, int opcode,
 			u64 compare, u64 swap_add, u64 *orig_val);
 int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value);
@@ -82,6 +86,16 @@ int rxe_invalidate_mr(struct rxe_qp *qp, u32 key);
 int rxe_reg_fast_mr(struct rxe_qp *qp, struct rxe_send_wqe *wqe);
 void rxe_mr_cleanup(struct rxe_pool_elem *elem);
 
+static inline unsigned long rxe_mr_iova_to_index(struct rxe_mr *mr, u64 iova)
+{
+	return (iova >> mr->page_shift) - (mr->ibmr.iova >> mr->page_shift);
+}
+
+static inline unsigned long rxe_mr_iova_to_page_offset(struct rxe_mr *mr, u64 iova)
+{
+	return iova & (mr_page_size(mr) - 1);
+}
+
 /* rxe_mw.c */
 int rxe_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata);
 int rxe_dealloc_mw(struct ib_mw *ibmw);
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index 0e538fafcc20..ffbac6f5e828 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -49,7 +49,7 @@ int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length)
 				| IB_ACCESS_REMOTE_WRITE	\
 				| IB_ACCESS_REMOTE_ATOMIC)
 
-static void rxe_mr_init(int access, struct rxe_mr *mr)
+void rxe_mr_init(int access, struct rxe_mr *mr)
 {
 	u32 lkey = mr->elem.index << 8 | rxe_get_next_key(-1);
 	u32 rkey = (access & IB_ACCESS_REMOTE) ? lkey : 0;
@@ -77,16 +77,6 @@ void rxe_mr_init_dma(int access, struct rxe_mr *mr)
 	mr->ibmr.type = IB_MR_TYPE_DMA;
 }
 
-static unsigned long rxe_mr_iova_to_index(struct rxe_mr *mr, u64 iova)
-{
-	return (iova >> mr->page_shift) - (mr->ibmr.iova >> mr->page_shift);
-}
-
-static unsigned long rxe_mr_iova_to_page_offset(struct rxe_mr *mr, u64 iova)
-{
-	return iova & (mr_page_size(mr) - 1);
-}
-
 static bool is_pmem_page(struct page *pg)
 {
 	unsigned long paddr = page_to_phys(pg);
@@ -96,7 +86,7 @@ static bool is_pmem_page(struct page *pg)
 				 IORES_DESC_PERSISTENT_MEMORY);
 }
 
-static int rxe_mr_fill_pages_from_sgt(struct rxe_mr *mr, struct sg_table *sgt)
+int rxe_mr_fill_pages_from_sgt(struct rxe_mr *mr, struct sg_table *sgt)
 {
 	XA_STATE(xas, &mr->page_list, 0);
 	struct sg_page_iter sg_iter;
@@ -247,8 +237,8 @@ int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sgl,
 	return ib_sg_to_pages(ibmr, sgl, sg_nents, sg_offset, rxe_set_page);
 }
 
-static int rxe_mr_copy_xarray(struct rxe_mr *mr, u64 iova, void *addr,
-			      unsigned int length, enum rxe_mr_copy_dir dir)
+int rxe_mr_copy_xarray(struct rxe_mr *mr, u64 iova, void *addr,
+		       unsigned int length, enum rxe_mr_copy_dir dir)
 {
 	unsigned int page_offset = rxe_mr_iova_to_page_offset(mr, iova);
 	unsigned long index = rxe_mr_iova_to_index(mr, iova);
-- 
2.39.1