Most RDMA drivers rely on a linear table of DMA addresses organized in
some device specific page size.
For a while now the core code has had the rdma_for_each_block() SG
iterator to help break a umem into DMA blocks for use in the device lists.
Improve on this by adding rdma_umem_for_each_dma_block(),
ib_umem_dma_offset() and ib_umem_num_dma_blocks().
Replace open codings, or calls to fixed PAGE_SIZE APIs, in most of the
drivers with one of the above APIs.
Get rid of the really weird and duplicative ib_umem_page_count().
Fix two problems with ib_umem_find_best_pgsz().
At this point many of the driver have a clear path to call
ib_umem_find_best_pgsz() and replace hardcoded PAGE_SIZE or PAGE_SHIFT
values when constructing their DMA lists.
This is the first series in an effort to modernize the umem usage in all
the DMA drivers.
Jason Gunthorpe (14):
RDMA/umem: Fix ib_umem_find_best_pgsz() for mappings that cross a page
boundary
RDMA/umem: Prevent small pages from being returned by
ib_umem_find_best_pgsz()
RDMA/umem: Use simpler logic for ib_umem_find_best_pgsz()
RDMA/umem: Add rdma_umem_for_each_dma_block()
RDMA/umem: Replace for_each_sg_dma_page with
rdma_umem_for_each_dma_block
RDMA/umem: Split ib_umem_num_pages() into ib_umem_num_dma_blocks()
RDMA/qedr: Use rdma_umem_for_each_dma_block() instead of open-coding
RDMA/qedr: Use ib_umem_num_dma_blocks() instead of
ib_umem_page_count()
RDMA/bnxt: Do not use ib_umem_page_count() or ib_umem_num_pages()
RDMA/hns: Use ib_umem_num_dma_blocks() instead of opencoding
RDMA/ocrdma: Use ib_umem_num_dma_blocks() instead of
ib_umem_page_count()
RDMA/pvrdma: Use ib_umem_num_dma_blocks() instead of
ib_umem_page_count()
RDMA/mlx5: Use ib_umem_num_dma_blocks()
RDMA/umem: Rename ib_umem_offset() to ib_umem_dma_offset()
.clang-format | 1 +
drivers/infiniband/core/umem.c | 41 ++++++-----
drivers/infiniband/hw/bnxt_re/ib_verbs.c | 72 +++++++------------
drivers/infiniband/hw/cxgb4/mem.c | 8 +--
drivers/infiniband/hw/efa/efa_verbs.c | 3 +-
drivers/infiniband/hw/hns/hns_roce_alloc.c | 3 +-
drivers/infiniband/hw/hns/hns_roce_mr.c | 49 +++++--------
drivers/infiniband/hw/i40iw/i40iw_verbs.c | 3 +-
drivers/infiniband/hw/mlx4/cq.c | 8 +--
drivers/infiniband/hw/mlx4/mlx4_ib.h | 3 +-
drivers/infiniband/hw/mlx4/mr.c | 14 ++--
drivers/infiniband/hw/mlx4/qp.c | 17 ++---
drivers/infiniband/hw/mlx4/srq.c | 5 +-
drivers/infiniband/hw/mlx5/mem.c | 5 +-
drivers/infiniband/hw/mthca/mthca_provider.c | 8 +--
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 26 +++----
drivers/infiniband/hw/qedr/verbs.c | 50 ++++++-------
drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c | 2 +-
.../infiniband/hw/vmw_pvrdma/pvrdma_misc.c | 9 ++-
drivers/infiniband/hw/vmw_pvrdma/pvrdma_mr.c | 2 +-
drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c | 6 +-
drivers/infiniband/hw/vmw_pvrdma/pvrdma_srq.c | 2 +-
drivers/infiniband/sw/rdmavt/mr.c | 2 +-
drivers/infiniband/sw/rxe/rxe_mr.c | 2 +-
include/rdma/ib_umem.h | 45 +++++++++---
include/rdma/ib_verbs.h | 24 -------
26 files changed, 184 insertions(+), 226 deletions(-)
--
2.28.0
