RDMA/siw: Introduce siw_get_page

Add the wrapper function to get either pbl page or umem page.

Acked-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Link: https://lore.kernel.org/r/20231113115726.12762-2-guoqing.jiang@linux.dev
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 64c113d..86186cd 100644 (file)
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -34,6 +34,15 @@ static struct page *siw_get_pblpage(struct siw_mem *mem, u64 addr, int *idx)
        return NULL;
 }
 
+static struct page *siw_get_page(struct siw_mem *mem, struct siw_sge *sge,
+                                unsigned long offset, int *pbl_idx)
+{
+       if (!mem->is_pbl)
+               return siw_get_upage(mem->umem, sge->laddr + offset);
+       else
+               return siw_get_pblpage(mem, sge->laddr + offset, pbl_idx);
+}
+
 /*
  * Copy short payload at provided destination payload address
  */
@@ -67,11 +76,7 @@ static int siw_try_1seg(struct siw_iwarp_tx *c_tx, void *paddr)
                        char *buffer;
                        int pbl_idx = 0;
 
-                       if (!mem->is_pbl)
-                               p = siw_get_upage(mem->umem, sge->laddr);
-                       else
-                               p = siw_get_pblpage(mem, sge->laddr, &pbl_idx);
-
+                       p = siw_get_page(mem, sge, 0, &pbl_idx);
                        if (unlikely(!p))
                                return -EFAULT;
 
@@ -85,13 +90,7 @@ static int siw_try_1seg(struct siw_iwarp_tx *c_tx, void *paddr)
                                memcpy(paddr, buffer + off, part);
                                kunmap_local(buffer);
 
-                               if (!mem->is_pbl)
-                                       p = siw_get_upage(mem->umem,
-                                                         sge->laddr + part);
-                               else
-                                       p = siw_get_pblpage(mem,
-                                                           sge->laddr + part,
-                                                           &pbl_idx);
+                               p = siw_get_page(mem, sge, part, &pbl_idx);
                                if (unlikely(!p))
                                        return -EFAULT;
 
@@ -498,13 +497,7 @@ static int siw_tx_hdt(struct siw_iwarp_tx *c_tx, struct socket *s)
                        if (!is_kva) {
                                struct page *p;
 
-                               if (mem->is_pbl)
-                                       p = siw_get_pblpage(
-                                               mem, sge->laddr + sge_off,
-                                               &pbl_idx);
-                               else
-                                       p = siw_get_upage(mem->umem,
-                                                         sge->laddr + sge_off);
+                               p = siw_get_page(mem, sge, sge_off, &pbl_idx);
                                if (unlikely(!p)) {
                                        siw_unmap_pages(iov, kmap_mask, seg);
                                        wqe->processed -= c_tx->bytes_unsent;