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RDMA/hns: Add mapped page count checking for MTR

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Add the mapped page count checking flow to avoid invalid page size when
creating MTR.

Fixes: 38389eaa4db1 ("RDMA/hns: Add mtr support for mixed multihop addressing")
Link: https://lore.kernel.org/r/1612517974-31867-4-git-send-email-liweihang@huawei.com
Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Xi Wang 2021-02-05 17:39:25 +08:00 committed by Jason Gunthorpe
parent ea4092f3b5
commit 9ea9a53ea9
2 changed files with 40 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/infiniband/hw/hns/hns_roce_hem.c
View File

@ -1075,9 +1075,8 @@ static struct roce_hem_item *hem_list_alloc_item(struct hns_roce_dev *hr_dev,
return NULL;
if (exist_bt) {
hem->addr = dma_alloc_coherent(hr_dev->dev,
count * BA_BYTE_LEN,
&hem->dma_addr, GFP_KERNEL);
hem->addr = dma_alloc_coherent(hr_dev->dev, count * BA_BYTE_LEN,
&hem->dma_addr, GFP_KERNEL);
if (!hem->addr) {
kfree(hem);
return NULL;
@ -1336,6 +1335,10 @@ static int hem_list_alloc_root_bt(struct hns_roce_dev *hr_dev,
if (ba_num < 1)
return -ENOMEM;
if (ba_num > unit)
return -ENOBUFS;
ba_num = min_t(int, ba_num, unit);
INIT_LIST_HEAD(&temp_root);
offset = r->offset;
/* indicate to last region */

56
drivers/infiniband/hw/hns/hns_roce_mr.c
View File

@ -596,30 +596,26 @@ int hns_roce_dealloc_mw(struct ib_mw *ibmw)
}
static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
dma_addr_t *pages, struct hns_roce_buf_region *region)
struct hns_roce_buf_region *region, dma_addr_t *pages,
int max_count)
{
int count, npage;
int offset, end;
__le64 *mtts;
int offset;
int count;
int npage;
u64 addr;
int end;
int i;
/* if hopnum is 0, buffer cannot store BAs, so skip write mtt */
if (!region->hopnum)
return 0;
offset = region->offset;
end = offset + region->count;
npage = 0;
while (offset < end) {
while (offset < end && npage < max_count) {
count = 0;
mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
offset, &count, NULL);
if (!mtts)
return -ENOBUFS;
for (i = 0; i < count; i++) {
for (i = 0; i < count && npage < max_count; i++) {
if (hr_dev->hw_rev == HNS_ROCE_HW_VER1)
addr = to_hr_hw_page_addr(pages[npage]);
else
@ -631,7 +627,7 @@ static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
offset += count;
}
return 0;
return npage;
}
static inline bool mtr_has_mtt(struct hns_roce_buf_attr *attr)
@ -779,8 +775,8 @@ int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
{
struct ib_device *ibdev = &hr_dev->ib_dev;
struct hns_roce_buf_region *r;
unsigned int i;
int err;
unsigned int i, mapped_cnt;
int ret;
/*
* Only use the first page address as root ba when hopnum is 0, this
@ -791,26 +787,42 @@ int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
return 0;
}
for (i = 0; i < mtr->hem_cfg.region_count; i++) {
for (i = 0, mapped_cnt = 0; i < mtr->hem_cfg.region_count &&
mapped_cnt < page_cnt; i++) {
r = &mtr->hem_cfg.region[i];
/* if hopnum is 0, no need to map pages in this region */
if (!r->hopnum) {
mapped_cnt += r->count;
continue;
}
if (r->offset + r->count > page_cnt) {
err = -EINVAL;
ret = -EINVAL;
ibdev_err(ibdev,
"failed to check mtr%u end %u + %u, max %u.\n",
i, r->offset, r->count, page_cnt);
return err;
return ret;
}
err = mtr_map_region(hr_dev, mtr, &pages[r->offset], r);
if (err) {
ret = mtr_map_region(hr_dev, mtr, r, &pages[r->offset],
page_cnt - mapped_cnt);
if (ret < 0) {
ibdev_err(ibdev,
"failed to map mtr%u offset %u, ret = %d.\n",
i, r->offset, err);
return err;
i, r->offset, ret);
return ret;
}
mapped_cnt += ret;
ret = 0;
}
return 0;
if (mapped_cnt < page_cnt) {
ret = -ENOBUFS;
ibdev_err(ibdev, "failed to map mtr pages count: %u < %u.\n",
mapped_cnt, page_cnt);
}
return ret;
}
int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,