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RDMA/rxe: Use for_each_sg_page iterator on umem SGL

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The driver walks the umem SGL assuming a 1:1 mapping between SGE and
system page. Update to use the for_each_sg_page iterator to get individual
pages contained in the SGEs.  This is a pre-requisite before adding page
combining into SGEs while building the scatter table in IB core.

Additionally, purge umem->page_shift usage in the driver as its only
relevant for ODP MRs. Use system page size and shift instead.

Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Shiraz, Saleem 2019-02-11 09:25:07 -06:00 committed by Jason Gunthorpe
parent be8c456abf
commit 8317d6cdc1
1 changed files with 6 additions and 7 deletions
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13
drivers/infiniband/sw/rxe/rxe_mr.c
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@ -162,11 +162,10 @@ int rxe_mem_init_user(struct rxe_pd *pd, u64 start,
u64 length, u64 iova, int access, struct ib_udata *udata, u64 length, u64 iova, int access, struct ib_udata *udata,
struct rxe_mem *mem) struct rxe_mem *mem)
{ {
int entry;
struct rxe_map **map; struct rxe_map **map;
struct rxe_phys_buf *buf = NULL; struct rxe_phys_buf *buf = NULL;
struct ib_umem *umem; struct ib_umem *umem;
struct scatterlist *sg; struct sg_page_iter sg_iter;
int num_buf; int num_buf;
void *vaddr; void *vaddr;
int err; int err;
@ -191,16 +190,16 @@ int rxe_mem_init_user(struct rxe_pd *pd, u64 start,
goto err1; goto err1;
} }
mem->page_shift = umem->page_shift; mem->page_shift = PAGE_SHIFT;
mem->page_mask = BIT(umem->page_shift) - 1; mem->page_mask = PAGE_SIZE - 1;
num_buf = 0; num_buf = 0;
map = mem->map; map = mem->map;
if (length > 0) { if (length > 0) {
buf = map[0]->buf; buf = map[0]->buf;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) { for_each_sg_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
vaddr = page_address(sg_page(sg)); vaddr = page_address(sg_page_iter_page(&sg_iter));
if (!vaddr) { if (!vaddr) {
pr_warn("null vaddr\n"); pr_warn("null vaddr\n");
err = -ENOMEM; err = -ENOMEM;
@ -208,7 +207,7 @@ int rxe_mem_init_user(struct rxe_pd *pd, u64 start,
} }
buf->addr = (uintptr_t)vaddr; buf->addr = (uintptr_t)vaddr;
buf->size = BIT(umem->page_shift); buf->size = PAGE_SIZE;
num_buf++; num_buf++;
buf++; buf++;