@@ -51,11 +51,11 @@ static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int d
struct scatterlist *sg;
unsigned int i;
- if (umem->nmap > 0)
- ib_dma_unmap_sg(dev, umem->sg_head.sgl, umem->sg_nents,
- DMA_BIDIRECTIONAL);
+ if (dirty)
+ ib_dma_unmap_sgtable_attrs(dev, &umem->sg_head,
+ DMA_BIDIRECTIONAL, 0);
- for_each_sg(umem->sg_head.sgl, sg, umem->sg_nents, i)
+ for_each_sgtable_sg(&umem->sg_head, sg, i)
unpin_user_page_range_dirty_lock(sg_page(sg),
DIV_ROUND_UP(sg->length, PAGE_SIZE), make_dirty);
@@ -111,7 +111,7 @@ unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
/* offset into first SGL */
pgoff = umem->address & ~PAGE_MASK;
- for_each_sg(umem->sg_head.sgl, sg, umem->nmap, i) {
+ for_each_sgtable_dma_sg(&umem->sg_head, sg, i) {
/* Walk SGL and reduce max page size if VA/PA bits differ
* for any address.
*/
@@ -121,7 +121,7 @@ unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
* the maximum possible page size as the low bits of the iova
* must be zero when starting the next chunk.
*/
- if (i != (umem->nmap - 1))
+ if (i != (umem->sg_head.nents - 1))
mask |= va;
pgoff = 0;
}
@@ -240,16 +240,10 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr,
if (access & IB_ACCESS_RELAXED_ORDERING)
dma_attr |= DMA_ATTR_WEAK_ORDERING;
- umem->nmap =
- ib_dma_map_sg_attrs(device, umem->sg_head.sgl, umem->sg_nents,
- DMA_BIDIRECTIONAL, dma_attr);
-
- if (!umem->nmap) {
- ret = -ENOMEM;
+ ret = ib_dma_map_sgtable_attrs(device, &umem->sg_head,
+ DMA_BIDIRECTIONAL, dma_attr);
+ if (ret)
goto umem_release;
- }
-
- ret = 0;
goto out;
umem_release:
@@ -309,8 +303,8 @@ int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
return -EINVAL;
}
- ret = sg_pcopy_to_buffer(umem->sg_head.sgl, umem->sg_nents, dst, length,
- offset + ib_umem_offset(umem));
+ ret = sg_pcopy_to_buffer(umem->sg_head.sgl, umem->sg_head.orig_nents,
+ dst, length, offset + ib_umem_offset(umem));
if (ret < 0)
return ret;
@@ -57,7 +57,6 @@ int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf)
umem_dmabuf->umem.sg_head.sgl = umem_dmabuf->first_sg;
umem_dmabuf->umem.sg_head.nents = nmap;
- umem_dmabuf->umem.nmap = nmap;
umem_dmabuf->sgt = sgt;
wait_fence:
@@ -200,7 +200,7 @@ int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
mtt_shift = mtt->page_shift;
mtt_size = 1ULL << mtt_shift;
- for_each_sg(umem->sg_head.sgl, sg, umem->nmap, i) {
+ for_each_sgtable_dma_sg(&umem->sg_head, sg, i) {
if (cur_start_addr + len == sg_dma_address(sg)) {
/* still the same block */
len += sg_dma_len(sg);
@@ -273,7 +273,7 @@ int mlx4_ib_umem_calc_optimal_mtt_size(struct ib_umem *umem, u64 start_va,
*num_of_mtts = ib_umem_num_dma_blocks(umem, PAGE_SIZE);
- for_each_sg(umem->sg_head.sgl, sg, umem->nmap, i) {
+ for_each_sgtable_dma_sg(&umem->sg_head, sg, i) {
/*
* Initialization - save the first chunk start as the
* current_block_start - block means contiguous pages.
@@ -1226,7 +1226,8 @@ int mlx5_ib_update_mr_pas(struct mlx5_ib_mr *mr, unsigned int flags)
orig_sg_length = sg.length;
cur_mtt = mtt;
- rdma_for_each_block (mr->umem->sg_head.sgl, &biter, mr->umem->nmap,
+ rdma_for_each_block (mr->umem->sg_head.sgl, &biter,
+ mr->umem->sg_head.nents,
BIT(mr->page_shift)) {
if (cur_mtt == (void *)mtt + sg.length) {
dma_sync_single_for_device(ddev, sg.addr, sg.length,
@@ -410,7 +410,7 @@ struct ib_mr *rvt_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
mr->mr.page_shift = PAGE_SHIFT;
m = 0;
n = 0;
- for_each_sg_page (umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
+ for_each_sg_page (umem->sg_head.sgl, &sg_iter, umem->sg_head.nents, 0) {
void *vaddr;
vaddr = page_address(sg_page_iter_page(&sg_iter));
@@ -141,7 +141,8 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
if (length > 0) {
buf = map[0]->buf;
- for_each_sg_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
+ for_each_sg_page(umem->sg_head.sgl, &sg_iter,
+ umem->sg_head.nents, 0) {
if (num_buf >= RXE_BUF_PER_MAP) {
map++;
buf = map[0]->buf;
@@ -76,7 +76,8 @@ static inline void __rdma_umem_block_iter_start(struct ib_block_iter *biter,
struct ib_umem *umem,
unsigned long pgsz)
{
- __rdma_block_iter_start(biter, umem->sg_head.sgl, umem->nmap, pgsz);
+ __rdma_block_iter_start(biter, umem->sg_head.sgl, umem->sg_head.nents,
+ pgsz);
}
/**
@@ -4057,6 +4057,34 @@ static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
dma_attrs);
}
+/**
+ * ib_dma_map_sgtable_attrs - Map a scatter/gather table to DMA addresses
+ * @dev: The device for which the DMA addresses are to be created
+ * @sg: The sg_table object describing the buffer
+ * @direction: The direction of the DMA
+ * @attrs: Optional DMA attributes for the map operation
+ */
+static inline int ib_dma_map_sgtable_attrs(struct ib_device *dev,
+ struct sg_table *sgt,
+ enum dma_data_direction direction,
+ unsigned long dma_attrs)
+{
+ if (ib_uses_virt_dma(dev)) {
+ ib_dma_virt_map_sg(dev, sgt->sgl, sgt->orig_nents);
+ return 0;
+ }
+ return dma_map_sgtable(dev->dma_device, sgt, direction, dma_attrs);
+}
+
+static inline void ib_dma_unmap_sgtable_attrs(struct ib_device *dev,
+ struct sg_table *sgt,
+ enum dma_data_direction direction,
+ unsigned long dma_attrs)
+{
+ if (!ib_uses_virt_dma(dev))
+ dma_unmap_sgtable(dev->dma_device, sgt, direction, dma_attrs);
+}
+
/**
* ib_dma_map_sg - Map a scatter/gather list to DMA addresses
* @dev: The device for which the DMA addresses are to be created