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author | Chengchang Tang <tangchengchang@huawei.com> | 2024-01-13 16:59:31 +0800 |
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committer | Leon Romanovsky <leon@kernel.org> | 2024-01-25 11:54:38 +0200 |
commit | 4f5731b1fb2246719513dfb918bf71b6818aa5f5 (patch) | |
tree | b139092e9d1de800fd2824fc9f40002dc4646843 | |
parent | a4ca341080758d847db155b97887bff6f84016a4 (diff) | |
download | linux-4f5731b1fb2246719513dfb918bf71b6818aa5f5.tar.gz linux-4f5731b1fb2246719513dfb918bf71b6818aa5f5.tar.bz2 linux-4f5731b1fb2246719513dfb918bf71b6818aa5f5.zip |
RDMA/hns: Refactor mtr_init_buf_cfg()
page_shift and page_cnt is only used in mtr_map_bufs(). And these
parameter could be calculated indepedently.
Strip the computation of page_shift and page_cnt from mtr_init_buf_cfg(),
reducing the number of parameters of it. This helps reducing coupling
between mtr_init_buf_cfg() and mtr_map_bufs().
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://lore.kernel.org/r/20240113085935.2838701-3-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
-rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_mr.c | 76 |
1 files changed, 45 insertions, 31 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c index 9537a2c00bb6..adc401aea8df 100644 --- a/drivers/infiniband/hw/hns/hns_roce_mr.c +++ b/drivers/infiniband/hw/hns/hns_roce_mr.c @@ -707,14 +707,37 @@ static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, return 0; } -static int mtr_map_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, - int page_count, unsigned int page_shift) +static int cal_mtr_pg_cnt(struct hns_roce_mtr *mtr) +{ + struct hns_roce_buf_region *region; + int page_cnt = 0; + int i; + + for (i = 0; i < mtr->hem_cfg.region_count; i++) { + region = &mtr->hem_cfg.region[i]; + page_cnt += region->count; + } + + return page_cnt; +} + +static int mtr_map_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr) { struct ib_device *ibdev = &hr_dev->ib_dev; + int page_count = cal_mtr_pg_cnt(mtr); + unsigned int page_shift; dma_addr_t *pages; int npage; int ret; + /* When HEM buffer uses 0-level addressing, the page size is + * equal to the whole buffer size, and we split the buffer into + * small pages which is used to check whether the adjacent + * units are in the continuous space and its size is fixed to + * 4K based on hns ROCEE's requirement. + */ + page_shift = mtr->hem_cfg.is_direct ? HNS_HW_PAGE_SHIFT : + mtr->hem_cfg.buf_pg_shift; /* alloc a tmp array to store buffer's dma address */ pages = kvcalloc(page_count, sizeof(dma_addr_t), GFP_KERNEL); if (!pages) @@ -894,37 +917,30 @@ int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev, struct hns_roce_buf_attr *attr, - struct hns_roce_hem_cfg *cfg, - unsigned int *buf_page_shift, u64 unalinged_size) + struct hns_roce_hem_cfg *cfg, u64 unalinged_size) { + struct ib_device *ibdev = &hr_dev->ib_dev; struct hns_roce_buf_region *r; u64 first_region_padding; int page_cnt, region_cnt; - unsigned int page_shift; + size_t buf_pg_sz; size_t buf_size; /* If mtt is disabled, all pages must be within a continuous range */ cfg->is_direct = !mtr_has_mtt(attr); buf_size = mtr_bufs_size(attr); if (cfg->is_direct) { - /* When HEM buffer uses 0-level addressing, the page size is - * equal to the whole buffer size, and we split the buffer into - * small pages which is used to check whether the adjacent - * units are in the continuous space and its size is fixed to - * 4K based on hns ROCEE's requirement. - */ - page_shift = HNS_HW_PAGE_SHIFT; - - /* The ROCEE requires the page size to be 4K * 2 ^ N. */ + buf_pg_sz = HNS_HW_PAGE_SIZE; cfg->buf_pg_count = 1; + /* The ROCEE requires the page size to be 4K * 2 ^ N. */ cfg->buf_pg_shift = HNS_HW_PAGE_SHIFT + order_base_2(DIV_ROUND_UP(buf_size, HNS_HW_PAGE_SIZE)); first_region_padding = 0; } else { - page_shift = attr->page_shift; cfg->buf_pg_count = DIV_ROUND_UP(buf_size + unalinged_size, - 1 << page_shift); - cfg->buf_pg_shift = page_shift; + 1 << attr->page_shift); + cfg->buf_pg_shift = attr->page_shift; + buf_pg_sz = 1 << cfg->buf_pg_shift; first_region_padding = unalinged_size; } @@ -937,7 +953,7 @@ static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev, r->offset = page_cnt; buf_size = hr_hw_page_align(attr->region[region_cnt].size + first_region_padding); - r->count = DIV_ROUND_UP(buf_size, 1 << page_shift); + r->count = DIV_ROUND_UP(buf_size, buf_pg_sz); first_region_padding = 0; page_cnt += r->count; r->hopnum = to_hr_hem_hopnum(attr->region[region_cnt].hopnum, @@ -945,9 +961,13 @@ static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev, } cfg->region_count = region_cnt; - *buf_page_shift = page_shift; + if (cfg->region_count < 1 || cfg->buf_pg_shift < HNS_HW_PAGE_SHIFT) { + ibdev_err(ibdev, "failed to init mtr cfg, count %d shift %u.\n", + cfg->region_count, cfg->buf_pg_shift); + return -EINVAL; + } - return page_cnt; + return 0; } static u64 cal_pages_per_l1ba(unsigned int ba_per_bt, unsigned int hopnum) @@ -1035,18 +1055,12 @@ int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, unsigned long user_addr) { struct ib_device *ibdev = &hr_dev->ib_dev; - unsigned int buf_page_shift = 0; - int buf_page_cnt; int ret; - buf_page_cnt = mtr_init_buf_cfg(hr_dev, buf_attr, &mtr->hem_cfg, - &buf_page_shift, - udata ? user_addr & ~PAGE_MASK : 0); - if (buf_page_cnt < 1 || buf_page_shift < HNS_HW_PAGE_SHIFT) { - ibdev_err(ibdev, "failed to init mtr cfg, count %d shift %u.\n", - buf_page_cnt, buf_page_shift); - return -EINVAL; - } + ret = mtr_init_buf_cfg(hr_dev, buf_attr, &mtr->hem_cfg, + udata ? user_addr & ~PAGE_MASK : 0); + if (ret) + return ret; ret = mtr_alloc_mtt(hr_dev, mtr, ba_page_shift); if (ret) { @@ -1070,7 +1084,7 @@ int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr, } /* Write buffer's dma address to MTT */ - ret = mtr_map_bufs(hr_dev, mtr, buf_page_cnt, buf_page_shift); + ret = mtr_map_bufs(hr_dev, mtr); if (ret) ibdev_err(ibdev, "failed to map mtr bufs, ret = %d.\n", ret); else |