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RDMA/hns: Add a group interfaces for optimizing buffers getting flow

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Currently, the code for getting umem and kmem buffers exist many files,
this patch adds a group interfaces to simplify the buffers getting flow.

Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Lijun Ou 2019-06-08 14:46:09 +08:00 committed by Doug Ledford
parent 38389eaa4d
commit 2ac0bc5e72
2 changed files with 111 additions and 0 deletions
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99
drivers/infiniband/hw/hns/hns_roce_alloc.c
View File

@ -34,6 +34,7 @@
#include <linux/platform_device.h>
#include <linux/vmalloc.h>
#include "hns_roce_device.h"
#include <rdma/ib_umem.h>
int hns_roce_bitmap_alloc(struct hns_roce_bitmap *bitmap, unsigned long *obj)
{
@ -238,6 +239,104 @@ int hns_roce_buf_alloc(struct hns_roce_dev *hr_dev, u32 size, u32 max_direct,
return -ENOMEM;
}
int hns_roce_get_kmem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
int buf_cnt, int start, struct hns_roce_buf *buf)
{
int i, end;
int total;
end = start + buf_cnt;
if (end > buf->npages) {
dev_err(hr_dev->dev,
"invalid kmem region,offset %d,buf_cnt %d,total %d!\n",
start, buf_cnt, buf->npages);
return -EINVAL;
}
total = 0;
for (i = start; i < end; i++)
if (buf->nbufs == 1)
bufs[total++] = buf->direct.map +
(i << buf->page_shift);
else
bufs[total++] = buf->page_list[i].map;
return total;
}
int hns_roce_get_umem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
int buf_cnt, int start, struct ib_umem *umem,
int page_shift)
{
struct ib_block_iter biter;
int total = 0;
int idx = 0;
u64 addr;
if (page_shift < PAGE_SHIFT) {
dev_err(hr_dev->dev, "invalid page shift %d!\n", page_shift);
return -EINVAL;
}
/* convert system page cnt to hw page cnt */
rdma_for_each_block(umem->sg_head.sgl, &biter, umem->nmap,
1 << page_shift) {
addr = rdma_block_iter_dma_address(&biter);
if (idx >= start) {
bufs[total++] = addr;
if (total >= buf_cnt)
goto done;
}
idx++;
}
done:
return total;
}
void hns_roce_init_buf_region(struct hns_roce_buf_region *region, int hopnum,
int offset, int buf_cnt)
{
if (hopnum == HNS_ROCE_HOP_NUM_0)
region->hopnum = 0;
else
region->hopnum = hopnum;
region->offset = offset;
region->count = buf_cnt;
}
void hns_roce_free_buf_list(dma_addr_t **bufs, int region_cnt)
{
int i;
for (i = 0; i < region_cnt; i++) {
kfree(bufs[i]);
bufs[i] = NULL;
}
}
int hns_roce_alloc_buf_list(struct hns_roce_buf_region *regions,
dma_addr_t **bufs, int region_cnt)
{
struct hns_roce_buf_region *r;
int i;
for (i = 0; i < region_cnt; i++) {
r = &regions[i];
bufs[i] = kcalloc(r->count, sizeof(dma_addr_t), GFP_KERNEL);
if (!bufs[i])
goto err_alloc;
}
return 0;
err_alloc:
hns_roce_free_buf_list(bufs, i);
return -ENOMEM;
}
void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
{
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SRQ)

12
drivers/infiniband/hw/hns/hns_roce_device.h
View File

@ -1211,6 +1211,18 @@ int hns_roce_buf_alloc(struct hns_roce_dev *hr_dev, u32 size, u32 max_direct,
int hns_roce_ib_umem_write_mtt(struct hns_roce_dev *hr_dev,
struct hns_roce_mtt *mtt, struct ib_umem *umem);
void hns_roce_init_buf_region(struct hns_roce_buf_region *region, int hopnum,
int offset, int buf_cnt);
int hns_roce_alloc_buf_list(struct hns_roce_buf_region *regions,
dma_addr_t **bufs, int count);
void hns_roce_free_buf_list(dma_addr_t **bufs, int count);
int hns_roce_get_kmem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
int buf_cnt, int start, struct hns_roce_buf *buf);
int hns_roce_get_umem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
int buf_cnt, int start, struct ib_umem *umem,
int page_shift);
int hns_roce_create_srq(struct ib_srq *srq,
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata);