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RDMA: Use the sg_table directly and remove the opencoded version from 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.

Link: https://lore.kernel.org/r/20210824142531.3877007-4-maorg@nvidia.com
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Maor Gottlieb 2021-08-24 17:25:31 +03:00 committed by Jason Gunthorpe
parent 3e302dbc67
commit 79fbd3e124
13 changed files with 60 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/infiniband/core/umem.c
View File

@ -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,
ret = ib_dma_map_sgtable_attrs(device, &umem->sgt_append.sgt,
DMA_BIDIRECTIONAL, dma_attr);
if (!umem->nmap) {
ret = -ENOMEM;
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)

5
drivers/infiniband/core/umem_dmabuf.c
View File

@ -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:

4
drivers/infiniband/hw/hns/hns_roce_db.c
View File

@ -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);

2
drivers/infiniband/hw/irdma/verbs.c
View File

@ -2235,7 +2235,7 @@ 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);

3
drivers/infiniband/hw/mlx4/doorbell.c
View File

@ -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;

4
drivers/infiniband/hw/mlx4/mr.c
View File

@ -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.

3
drivers/infiniband/hw/mlx5/doorbell.c
View File

@ -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;

3
drivers/infiniband/hw/mlx5/mr.c
View File

@ -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,

2
drivers/infiniband/hw/qedr/verbs.c
View File

@ -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;

2
drivers/infiniband/sw/rdmavt/mr.c
View File

@ -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));

2
drivers/infiniband/sw/rxe/rxe_mr.c
View File

@ -143,7 +143,7 @@ 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;

10
include/rdma/ib_umem.h
View File

@ -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);

28
include/rdma/ib_verbs.h
View File

@ -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