[PATCH v2 1/2] RDMA/rxe: Remove struct rxe_phys_buf

[Xiao Yang <yangx.jy@fujitsu.com>]

1) Remove rxe_phys_buf[n].size by using ibmr.page_size.
2) Replace rxe_phys_buf[n].buf with addrs[n].

Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
---
 drivers/infiniband/sw/rxe/rxe_mr.c    | 45 +++++++++------------------
 drivers/infiniband/sw/rxe/rxe_verbs.c |  6 +---
 drivers/infiniband/sw/rxe/rxe_verbs.h |  9 ++----
 3 files changed, 18 insertions(+), 42 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index bc081002bddc..4438eb8a3727 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -115,7 +115,6 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
 		     int access, struct rxe_mr *mr)
 {
 	struct rxe_map		**map;
-	struct rxe_phys_buf	*buf = NULL;
 	struct ib_umem		*umem;
 	struct sg_page_iter	sg_iter;
 	int			num_buf;
@@ -144,16 +143,14 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
 
 	mr->page_shift = PAGE_SHIFT;
 	mr->page_mask = PAGE_SIZE - 1;
+	mr->ibmr.page_size = PAGE_SIZE;
 
-	num_buf			= 0;
+	num_buf	= 0;
 	map = mr->map;
 	if (length > 0) {
-		buf = map[0]->buf;
-
 		for_each_sgtable_page (&umem->sgt_append.sgt, &sg_iter, 0) {
 			if (num_buf >= RXE_BUF_PER_MAP) {
 				map++;
-				buf = map[0]->buf;
 				num_buf = 0;
 			}
 
@@ -165,10 +162,8 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
 				goto err_cleanup_map;
 			}
 
-			buf->addr = (uintptr_t)vaddr;
-			buf->size = PAGE_SIZE;
+			map[0]->addrs[num_buf] = (uintptr_t)vaddr;
 			num_buf++;
-			buf++;
 
 		}
 	}
@@ -216,9 +211,9 @@ static void lookup_iova(struct rxe_mr *mr, u64 iova, int *m_out, int *n_out,
 			size_t *offset_out)
 {
 	size_t offset = iova - mr->ibmr.iova + mr->offset;
+	u64 length = mr->ibmr.page_size;
 	int			map_index;
-	int			buf_index;
-	u64			length;
+	int			addr_index;
 
 	if (likely(mr->page_shift)) {
 		*offset_out = offset & mr->page_mask;
@@ -227,23 +222,20 @@ static void lookup_iova(struct rxe_mr *mr, u64 iova, int *m_out, int *n_out,
 		*m_out = offset >> mr->map_shift;
 	} else {
 		map_index = 0;
-		buf_index = 0;
-
-		length = mr->map[map_index]->buf[buf_index].size;
+		addr_index = 0;
 
 		while (offset >= length) {
 			offset -= length;
-			buf_index++;
+			addr_index++;
 
-			if (buf_index == RXE_BUF_PER_MAP) {
+			if (addr_index == RXE_BUF_PER_MAP) {
 				map_index++;
-				buf_index = 0;
+				addr_index = 0;
 			}
-			length = mr->map[map_index]->buf[buf_index].size;
 		}
 
 		*m_out = map_index;
-		*n_out = buf_index;
+		*n_out = addr_index;
 		*offset_out = offset;
 	}
 }
@@ -273,13 +265,13 @@ void *iova_to_vaddr(struct rxe_mr *mr, u64 iova, int length)
 
 	lookup_iova(mr, iova, &m, &n, &offset);
 
-	if (offset + length > mr->map[m]->buf[n].size) {
+	if (offset + length > mr->ibmr.page_size) {
 		pr_warn("crosses page boundary\n");
 		addr = NULL;
 		goto out;
 	}
 
-	addr = (void *)(uintptr_t)mr->map[m]->buf[n].addr + offset;
+	addr = (void *)(uintptr_t)mr->map[m]->addrs[n] + offset;
 
 out:
 	return addr;
@@ -294,8 +286,6 @@ int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr, int length,
 	int			err;
 	int			bytes;
 	u8			*va;
-	struct rxe_map		**map;
-	struct rxe_phys_buf	*buf;
 	int			m;
 	int			i;
 	size_t			offset;
@@ -325,17 +315,14 @@ int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr, int length,
 
 	lookup_iova(mr, iova, &m, &i, &offset);
 
-	map = mr->map + m;
-	buf	= map[0]->buf + i;
-
 	while (length > 0) {
 		u8 *src, *dest;
 
-		va	= (u8 *)(uintptr_t)buf->addr + offset;
+		va	= (u8 *)(uintptr_t)mr->map[m]->addrs[i] + offset;
 		src = (dir == RXE_TO_MR_OBJ) ? addr : va;
 		dest = (dir == RXE_TO_MR_OBJ) ? va : addr;
 
-		bytes	= buf->size - offset;
+		bytes	= mr->ibmr.page_size - offset;
 
 		if (bytes > length)
 			bytes = length;
@@ -346,13 +333,11 @@ int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr, int length,
 		addr	+= bytes;
 
 		offset	= 0;
-		buf++;
 		i++;
 
 		if (i == RXE_BUF_PER_MAP) {
 			i = 0;
-			map++;
-			buf = map[0]->buf;
+			m++;
 		}
 	}
 
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index bcdfdadaebbc..13e4d660cb02 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -948,16 +948,12 @@ static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
 {
 	struct rxe_mr *mr = to_rmr(ibmr);
 	struct rxe_map *map;
-	struct rxe_phys_buf *buf;
 
 	if (unlikely(mr->nbuf == mr->num_buf))
 		return -ENOMEM;
 
 	map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
-	buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
-
-	buf->addr = addr;
-	buf->size = ibmr->page_size;
+	map->addrs[mr->nbuf % RXE_BUF_PER_MAP] = addr;
 	mr->nbuf++;
 
 	return 0;
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
index 22a299b0a9f0..d136f02d5b56 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.h
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
@@ -277,15 +277,10 @@ enum rxe_mr_lookup_type {
 	RXE_LOOKUP_REMOTE,
 };
 
-#define RXE_BUF_PER_MAP		(PAGE_SIZE / sizeof(struct rxe_phys_buf))
-
-struct rxe_phys_buf {
-	u64      addr;
-	u64      size;
-};
+#define RXE_BUF_PER_MAP		(PAGE_SIZE / sizeof(u64))
 
 struct rxe_map {
-	struct rxe_phys_buf	buf[RXE_BUF_PER_MAP];
+	u64 addrs[RXE_BUF_PER_MAP];
 };
 
 static inline int rkey_is_mw(u32 rkey)
-- 
2.25.1