[PATCH rdma-next v4 3/3] RDMA: Use the sg_table directly and remove the opencoded version from umem

From: Maor Gottlieb
Date: Tue Aug 24 2021 - 10:26:47 EST

Next message: Fabio M. De Francesco: "[PATCH v2 0/2] staging: r8188eu: Use new usb_control_msg_recv/send()"
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Next in thread: Leon Romanovsky: "Re: [PATCH rdma-next v4 0/3] SG fix together with update to RDMA umem"
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This allows using the normal sg_table APIs and makes all the code
cleaner. Remove sgt, nents and nmapd from ib_umem.

Signed-off-by: Maor Gottlieb <maorg@xxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
---
drivers/infiniband/core/umem.c | 32 +++++++++----------------
drivers/infiniband/core/umem_dmabuf.c | 5 ++--
drivers/infiniband/hw/hns/hns_roce_db.c | 4 ++--
drivers/infiniband/hw/irdma/verbs.c | 2 +-
drivers/infiniband/hw/mlx4/doorbell.c | 3 ++-
drivers/infiniband/hw/mlx4/mr.c | 4 ++--
drivers/infiniband/hw/mlx5/doorbell.c | 3 ++-
drivers/infiniband/hw/mlx5/mr.c | 3 ++-
drivers/infiniband/hw/qedr/verbs.c | 2 +-
drivers/infiniband/sw/rdmavt/mr.c | 2 +-
drivers/infiniband/sw/rxe/rxe_mr.c | 2 +-
include/rdma/ib_umem.h | 10 ++++----
include/rdma/ib_verbs.h | 28 ++++++++++++++++++++++
13 files changed, 59 insertions(+), 41 deletions(-)

diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 42481e7a72e8..86d479772fbc 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -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->sgt_append.sgt,
+ DMA_BIDIRECTIONAL, 0);

- for_each_sg(umem->sg_head.sgl, sg, umem->sg_nents, i)
+ for_each_sgtable_sg(&umem->sgt_append.sgt, 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->sgt_append.sgt, 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->sgt_append.sgt.nents - 1))
mask |= va;
pgoff = 0;
}
@@ -231,30 +231,19 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr,
&umem->sgt_append, page_list, pinned, 0,
pinned << PAGE_SHIFT, ib_dma_max_seg_size(device),
npages, GFP_KERNEL);
- umem->sg_nents = umem->sgt_append.sgt.nents;
if (ret) {
- memcpy(&umem->sg_head.sgl, &umem->sgt_append.sgt,
- sizeof(umem->sgt_append.sgt));
unpin_user_pages_dirty_lock(page_list, pinned, 0);
goto umem_release;
}
}

- memcpy(&umem->sg_head.sgl, &umem->sgt_append.sgt,
- sizeof(umem->sgt_append.sgt));
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->sgt_append.sgt,
+ DMA_BIDIRECTIONAL, dma_attr);
+ if (ret)
goto umem_release;
- }
-
- ret = 0;
goto out;

umem_release:
@@ -314,7 +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,
+ ret = sg_pcopy_to_buffer(umem->sgt_append.sgt.sgl,
+ umem->sgt_append.sgt.orig_nents, dst, length,
offset + ib_umem_offset(umem));

if (ret < 0)
diff --git a/drivers/infiniband/core/umem_dmabuf.c b/drivers/infiniband/core/umem_dmabuf.c
index c6e875619fac..e824baf4640d 100644
--- a/drivers/infiniband/core/umem_dmabuf.c
+++ b/drivers/infiniband/core/umem_dmabuf.c
@@ -55,9 +55,8 @@ int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf)
cur += sg_dma_len(sg);
}

- umem_dmabuf->umem.sg_head.sgl = umem_dmabuf->first_sg;
- umem_dmabuf->umem.sg_head.nents = nmap;
- umem_dmabuf->umem.nmap = nmap;
+ umem_dmabuf->umem.sgt_append.sgt.sgl = umem_dmabuf->first_sg;
+ umem_dmabuf->umem.sgt_append.sgt.nents = nmap;
umem_dmabuf->sgt = sgt;

wait_fence:
diff --git a/drivers/infiniband/hw/hns/hns_roce_db.c b/drivers/infiniband/hw/hns/hns_roce_db.c
index d40ea3d87260..751470c7a2ce 100644
--- a/drivers/infiniband/hw/hns/hns_roce_db.c
+++ b/drivers/infiniband/hw/hns/hns_roce_db.c
@@ -42,8 +42,8 @@ int hns_roce_db_map_user(struct hns_roce_ucontext *context, unsigned long virt,

found:
offset = virt - page_addr;
- db->dma = sg_dma_address(page->umem->sg_head.sgl) + offset;
- db->virt_addr = sg_virt(page->umem->sg_head.sgl) + offset;
+ db->dma = sg_dma_address(page->umem->sgt_append.sgt.sgl) + offset;
+ db->virt_addr = sg_virt(page->umem->sgt_append.sgt.sgl) + offset;
db->u.user_page = page;
refcount_inc(&page->refcount);

diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 9b8c451e2426..e8089da1b770 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -2231,7 +2231,7 @@ static void irdma_copy_user_pgaddrs(struct irdma_mr *iwmr, u64 *pbl,
pinfo = (level == PBLE_LEVEL_1) ? NULL : palloc->level2.leaf;

if (iwmr->type == IRDMA_MEMREG_TYPE_QP)
- iwpbl->qp_mr.sq_page = sg_page(region->sg_head.sgl);
+ iwpbl->qp_mr.sq_page = sg_page(region->sgt_append.sgt.sgl);

rdma_umem_for_each_dma_block(region, &biter, iwmr->page_size) {
*pbl = rdma_block_iter_dma_address(&biter);
diff --git a/drivers/infiniband/hw/mlx4/doorbell.c b/drivers/infiniband/hw/mlx4/doorbell.c
index d41f03ccb0e1..9bbd695a9fd5 100644
--- a/drivers/infiniband/hw/mlx4/doorbell.c
+++ b/drivers/infiniband/hw/mlx4/doorbell.c
@@ -75,7 +75,8 @@ int mlx4_ib_db_map_user(struct ib_udata *udata, unsigned long virt,
list_add(&page->list, &context->db_page_list);

found:
- db->dma = sg_dma_address(page->umem->sg_head.sgl) + (virt & ~PAGE_MASK);
+ db->dma = sg_dma_address(page->umem->sgt_append.sgt.sgl) +
+ (virt & ~PAGE_MASK);
db->u.user_page = page;
++page->refcnt;

diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 50becc0e4b62..04a67b481608 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -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->sgt_append.sgt, 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->sgt_append.sgt, sg, i) {
/*
* Initialization - save the first chunk start as the
* current_block_start - block means contiguous pages.
diff --git a/drivers/infiniband/hw/mlx5/doorbell.c b/drivers/infiniband/hw/mlx5/doorbell.c
index 9ca2e61807ec..6398e2f48579 100644
--- a/drivers/infiniband/hw/mlx5/doorbell.c
+++ b/drivers/infiniband/hw/mlx5/doorbell.c
@@ -78,7 +78,8 @@ int mlx5_ib_db_map_user(struct mlx5_ib_ucontext *context, unsigned long virt,
list_add(&page->list, &context->db_page_list);

found:
- db->dma = sg_dma_address(page->umem->sg_head.sgl) + (virt & ~PAGE_MASK);
+ db->dma = sg_dma_address(page->umem->sgt_append.sgt.sgl) +
+ (virt & ~PAGE_MASK);
db->u.user_page = page;
++page->refcnt;

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 3263851ea574..d1eb49dbca15 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -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->sgt_append.sgt.sgl, &biter,
+ mr->umem->sgt_append.sgt.nents,
BIT(mr->page_shift)) {
if (cur_mtt == (void *)mtt + sg.length) {
dma_sync_single_for_device(ddev, sg.addr, sg.length,
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 16d4c0228d76..fc081c5629ee 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -1481,7 +1481,7 @@ static int qedr_init_srq_user_params(struct ib_udata *udata,
return PTR_ERR(srq->prod_umem);
}

- sg = srq->prod_umem->sg_head.sgl;
+ sg = srq->prod_umem->sgt_append.sgt.sgl;
srq->hw_srq.phy_prod_pair_addr = sg_dma_address(sg);

return 0;
diff --git a/drivers/infiniband/sw/rdmavt/mr.c b/drivers/infiniband/sw/rdmavt/mr.c
index 34b7af6ab9c2..dfb99a56d952 100644
--- a/drivers/infiniband/sw/rdmavt/mr.c
+++ b/drivers/infiniband/sw/rdmavt/mr.c
@@ -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_sgtable_page (&umem->sgt_append.sgt, &sg_iter, 0) {
void *vaddr;

vaddr = page_address(sg_page_iter_page(&sg_iter));
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index 1ee5bd8291e5..16de1bc6db6e 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -141,7 +141,7 @@ 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_sgtable_page (&umem->sgt_append.sgt, &sg_iter, 0) {
if (num_buf >= RXE_BUF_PER_MAP) {
map++;
buf = map[0]->buf;
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h
index 33cb23b2ee3c..62f8e0604207 100644
--- a/include/rdma/ib_umem.h
+++ b/include/rdma/ib_umem.h
@@ -27,9 +27,6 @@ struct ib_umem {
u32 is_dmabuf : 1;
struct work_struct work;
struct sg_append_table sgt_append;
- struct sg_table sg_head;
- int nmap;
- unsigned int sg_nents;
};

struct ib_umem_dmabuf {
@@ -57,7 +54,7 @@ static inline int ib_umem_offset(struct ib_umem *umem)
static inline unsigned long ib_umem_dma_offset(struct ib_umem *umem,
unsigned long pgsz)
{
- return (sg_dma_address(umem->sg_head.sgl) + ib_umem_offset(umem)) &
+ return (sg_dma_address(umem->sgt_append.sgt.sgl) + ib_umem_offset(umem)) &
(pgsz - 1);
}

@@ -78,7 +75,8 @@ 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->sgt_append.sgt.sgl,
+ umem->sgt_append.sgt.nents, pgsz);
}

/**
@@ -129,7 +127,7 @@ static inline unsigned long ib_umem_find_best_pgoff(struct ib_umem *umem,
unsigned long pgsz_bitmap,
u64 pgoff_bitmask)
{
- struct scatterlist *sg = umem->sg_head.sgl;
+ struct scatterlist *sg = umem->sgt_append.sgt.sgl;
dma_addr_t dma_addr;

dma_addr = sg_dma_address(sg) + (umem->address & ~PAGE_MASK);
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index aa7806335cba..4b50d9a3018a 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4085,6 +4085,34 @@ 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
--
2.25.4

Next message: Fabio M. De Francesco: "[PATCH v2 0/2] staging: r8188eu: Use new usb_control_msg_recv/send()"
Previous message: Maor Gottlieb: "[PATCH rdma-next v4 2/3] lib/scatterlist: Fix wrong update of orig_nents"
In reply to: Jason Gunthorpe: "Re: [PATCH rdma-next v4 2/3] lib/scatterlist: Fix wrong update of orig_nents"
Next in thread: Leon Romanovsky: "Re: [PATCH rdma-next v4 0/3] SG fix together with update to RDMA umem"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]