diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-04-14 10:58:29 -0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2023-04-16 11:08:07 +0300 |
| commit | 8d7c7c0eeb74281c846ef9231ce20536c79a99b4 (patch) | |
| tree | b80b6fee2ff23604fd054ea29593ec8b6ece33c7 /drivers/infiniband/sw/rxe/rxe_mr.c | |
| parent | b2b1ddc457458fecd1c6f385baa9fbda5f0c63ad (diff) | |
RDMA: Add ib_virt_dma_to_page()
Make it clearer what is going on by adding a function to go back from the
"virtual" dma_addr to a kva and another to a struct page. This is used in the
ib_uses_virt_dma() style drivers (siw, rxe, hfi, qib).
Call them instead of a naked casting and virt_to_page() when working with dma_addr
values encoded by the various ib_map functions.
This also fixes the virt_to_page() casting problem Linus Walleij has been
chasing.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/0-v2-05ea785520ed+10-ib_virt_page_jgg@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_mr.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_mr.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c index 1e17f8086d59..0e538fafcc20 100644 --- a/drivers/infiniband/sw/rxe/rxe_mr.c +++ b/drivers/infiniband/sw/rxe/rxe_mr.c @@ -210,10 +210,10 @@ err1: return err; } -static int rxe_set_page(struct ib_mr *ibmr, u64 iova) +static int rxe_set_page(struct ib_mr *ibmr, u64 dma_addr) { struct rxe_mr *mr = to_rmr(ibmr); - struct page *page = virt_to_page(iova & mr->page_mask); + struct page *page = ib_virt_dma_to_page(dma_addr); bool persistent = !!(mr->access & IB_ACCESS_FLUSH_PERSISTENT); int err; @@ -279,16 +279,16 @@ static int rxe_mr_copy_xarray(struct rxe_mr *mr, u64 iova, void *addr, return 0; } -static void rxe_mr_copy_dma(struct rxe_mr *mr, u64 iova, void *addr, +static void rxe_mr_copy_dma(struct rxe_mr *mr, u64 dma_addr, void *addr, unsigned int length, enum rxe_mr_copy_dir dir) { - unsigned int page_offset = iova & (PAGE_SIZE - 1); + unsigned int page_offset = dma_addr & (PAGE_SIZE - 1); unsigned int bytes; struct page *page; u8 *va; while (length) { - page = virt_to_page(iova & mr->page_mask); + page = ib_virt_dma_to_page(dma_addr); bytes = min_t(unsigned int, length, PAGE_SIZE - page_offset); va = kmap_local_page(page); @@ -300,7 +300,7 @@ static void rxe_mr_copy_dma(struct rxe_mr *mr, u64 iova, void *addr, kunmap_local(va); page_offset = 0; - iova += bytes; + dma_addr += bytes; addr += bytes; length -= bytes; } @@ -488,7 +488,7 @@ int rxe_mr_do_atomic_op(struct rxe_mr *mr, u64 iova, int opcode, if (mr->ibmr.type == IB_MR_TYPE_DMA) { page_offset = iova & (PAGE_SIZE - 1); - page = virt_to_page(iova & PAGE_MASK); + page = ib_virt_dma_to_page(iova); } else { unsigned long index; int err; @@ -545,7 +545,7 @@ int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value) if (mr->ibmr.type == IB_MR_TYPE_DMA) { page_offset = iova & (PAGE_SIZE - 1); - page = virt_to_page(iova & PAGE_MASK); + page = ib_virt_dma_to_page(iova); } else { unsigned long index; int err; |