diff options
Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_mrmw.c')
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_mrmw.c | 57 |
1 files changed, 25 insertions, 32 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c index ead7230d7738..e239bbf54da1 100644 --- a/drivers/infiniband/hw/ehca/ehca_mrmw.c +++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c @@ -72,24 +72,14 @@ enum ehca_mr_pgsize { static u32 ehca_encode_hwpage_size(u32 pgsize) { - u32 idx = 0; - pgsize >>= 12; - /* - * map mr page size into hw code: - * 0, 1, 2, 3 for 4K, 64K, 1M, 64M - */ - while (!(pgsize & 1)) { - idx++; - pgsize >>= 4; - } - return idx; + int log = ilog2(pgsize); + WARN_ON(log < 12 || log > 24 || log & 3); + return (log - 12) / 4; } static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca) { - if (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M) - return EHCA_MR_PGSIZE16M; - return EHCA_MR_PGSIZE4K; + return 1UL << ilog2(shca->hca_cap_mr_pgsize); } static struct ehca_mr *ehca_mr_new(void) @@ -259,7 +249,7 @@ struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd, pginfo.u.phy.num_phys_buf = num_phys_buf; pginfo.u.phy.phys_buf_array = phys_buf_array; pginfo.next_hwpage = - ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize; + ((u64)iova_start & ~PAGE_MASK) / hw_pgsize; ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags, e_pd, &pginfo, &e_mr->ib.ib_mr.lkey, @@ -296,7 +286,7 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, container_of(pd->device, struct ehca_shca, ib_device); struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd); struct ehca_mr_pginfo pginfo; - int ret; + int ret, page_shift; u32 num_kpages; u32 num_hwpages; u64 hwpage_size; @@ -351,19 +341,20 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, /* determine number of MR pages */ num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE); /* select proper hw_pgsize */ - if (ehca_mr_largepage && - (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)) { - int page_shift = PAGE_SHIFT; - if (e_mr->umem->hugetlb) { - /* determine page_shift, clamp between 4K and 16M */ - page_shift = (fls64(length - 1) + 3) & ~3; - page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K), - EHCA_MR_PGSHIFT16M); - } - hwpage_size = 1UL << page_shift; - } else - hwpage_size = EHCA_MR_PGSIZE4K; /* ehca1 only supports 4k */ - ehca_dbg(pd->device, "hwpage_size=%lx", hwpage_size); + page_shift = PAGE_SHIFT; + if (e_mr->umem->hugetlb) { + /* determine page_shift, clamp between 4K and 16M */ + page_shift = (fls64(length - 1) + 3) & ~3; + page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K), + EHCA_MR_PGSHIFT16M); + } + hwpage_size = 1UL << page_shift; + + /* now that we have the desired page size, shift until it's + * supported, too. 4K is always supported, so this terminates. + */ + while (!(hwpage_size & shca->hca_cap_mr_pgsize)) + hwpage_size >>= 4; reg_user_mr_fallback: num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size); @@ -547,7 +538,7 @@ int ehca_rereg_phys_mr(struct ib_mr *mr, pginfo.u.phy.num_phys_buf = num_phys_buf; pginfo.u.phy.phys_buf_array = phys_buf_array; pginfo.next_hwpage = - ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize; + ((u64)iova_start & ~PAGE_MASK) / hw_pgsize; } if (mr_rereg_mask & IB_MR_REREG_ACCESS) new_acl = mr_access_flags; @@ -809,8 +800,9 @@ struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd, ib_fmr = ERR_PTR(-EINVAL); goto alloc_fmr_exit0; } - hw_pgsize = ehca_get_max_hwpage_size(shca); - if ((1 << fmr_attr->page_shift) != hw_pgsize) { + + hw_pgsize = 1 << fmr_attr->page_shift; + if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) { ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x", fmr_attr->page_shift); ib_fmr = ERR_PTR(-EINVAL); @@ -826,6 +818,7 @@ struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd, /* register MR on HCA */ memset(&pginfo, 0, sizeof(pginfo)); + pginfo.hwpage_size = hw_pgsize; /* * pginfo.num_hwpages==0, ie register_rpages() will not be called * but deferred to map_phys_fmr() |