diff options
Diffstat (limited to 'drivers/infiniband/hw/erdma/erdma_verbs.c')
-rw-r--r-- | drivers/infiniband/hw/erdma/erdma_verbs.c | 126 |
1 files changed, 27 insertions, 99 deletions
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c index ffc05ddc98ae..517676fbb8b1 100644 --- a/drivers/infiniband/hw/erdma/erdma_verbs.c +++ b/drivers/infiniband/hw/erdma/erdma_verbs.c @@ -1149,71 +1149,27 @@ void erdma_mmap_free(struct rdma_user_mmap_entry *rdma_entry) kfree(entry); } -#define ERDMA_SDB_PAGE 0 -#define ERDMA_SDB_ENTRY 1 -#define ERDMA_SDB_SHARED 2 - -static void alloc_db_resources(struct erdma_dev *dev, - struct erdma_ucontext *ctx) -{ - u32 bitmap_idx; - struct erdma_devattr *attrs = &dev->attrs; - - if (attrs->disable_dwqe) - goto alloc_normal_db; - - /* Try to alloc independent SDB page. */ - spin_lock(&dev->db_bitmap_lock); - bitmap_idx = find_first_zero_bit(dev->sdb_page, attrs->dwqe_pages); - if (bitmap_idx != attrs->dwqe_pages) { - set_bit(bitmap_idx, dev->sdb_page); - spin_unlock(&dev->db_bitmap_lock); - - ctx->sdb_type = ERDMA_SDB_PAGE; - ctx->sdb_idx = bitmap_idx; - ctx->sdb_page_idx = bitmap_idx; - ctx->sdb = dev->func_bar_addr + ERDMA_BAR_SQDB_SPACE_OFFSET + - (bitmap_idx << PAGE_SHIFT); - ctx->sdb_page_off = 0; - - return; - } - - bitmap_idx = find_first_zero_bit(dev->sdb_entry, attrs->dwqe_entries); - if (bitmap_idx != attrs->dwqe_entries) { - set_bit(bitmap_idx, dev->sdb_entry); - spin_unlock(&dev->db_bitmap_lock); - - ctx->sdb_type = ERDMA_SDB_ENTRY; - ctx->sdb_idx = bitmap_idx; - ctx->sdb_page_idx = attrs->dwqe_pages + - bitmap_idx / ERDMA_DWQE_TYPE1_CNT_PER_PAGE; - ctx->sdb_page_off = bitmap_idx % ERDMA_DWQE_TYPE1_CNT_PER_PAGE; - - ctx->sdb = dev->func_bar_addr + ERDMA_BAR_SQDB_SPACE_OFFSET + - (ctx->sdb_page_idx << PAGE_SHIFT); - - return; - } - - spin_unlock(&dev->db_bitmap_lock); - -alloc_normal_db: - ctx->sdb_type = ERDMA_SDB_SHARED; - ctx->sdb_idx = 0; - ctx->sdb_page_idx = ERDMA_SDB_SHARED_PAGE_INDEX; - ctx->sdb_page_off = 0; - - ctx->sdb = dev->func_bar_addr + (ctx->sdb_page_idx << PAGE_SHIFT); -} - -static int alloc_ext_db_resources(struct erdma_dev *dev, - struct erdma_ucontext *ctx) +static int alloc_db_resources(struct erdma_dev *dev, struct erdma_ucontext *ctx, + bool ext_db_en) { struct erdma_cmdq_ext_db_req req = {}; u64 val0, val1; int ret; + /* + * CAP_SYS_RAWIO is required if hardware does not support extend + * doorbell mechanism. + */ + if (!ext_db_en && !capable(CAP_SYS_RAWIO)) + return -EPERM; + + if (!ext_db_en) { + ctx->sdb = dev->func_bar_addr + ERDMA_BAR_SQDB_SPACE_OFFSET; + ctx->rdb = dev->func_bar_addr + ERDMA_BAR_RQDB_SPACE_OFFSET; + ctx->cdb = dev->func_bar_addr + ERDMA_BAR_CQDB_SPACE_OFFSET; + return 0; + } + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON, CMDQ_OPCODE_ALLOC_DB); @@ -1230,7 +1186,6 @@ static int alloc_ext_db_resources(struct erdma_dev *dev, ctx->ext_db.rdb_off = ERDMA_GET(val0, ALLOC_DB_RESP_RDB); ctx->ext_db.cdb_off = ERDMA_GET(val0, ALLOC_DB_RESP_CDB); - ctx->sdb_type = ERDMA_SDB_PAGE; ctx->sdb = dev->func_bar_addr + (ctx->ext_db.sdb_off << PAGE_SHIFT); ctx->cdb = dev->func_bar_addr + (ctx->ext_db.rdb_off << PAGE_SHIFT); ctx->rdb = dev->func_bar_addr + (ctx->ext_db.cdb_off << PAGE_SHIFT); @@ -1238,12 +1193,14 @@ static int alloc_ext_db_resources(struct erdma_dev *dev, return 0; } -static void free_ext_db_resources(struct erdma_dev *dev, - struct erdma_ucontext *ctx) +static void free_db_resources(struct erdma_dev *dev, struct erdma_ucontext *ctx) { struct erdma_cmdq_ext_db_req req = {}; int ret; + if (!ctx->ext_db.enable) + return; + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON, CMDQ_OPCODE_FREE_DB); @@ -1274,7 +1231,6 @@ int erdma_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *udata) struct erdma_dev *dev = to_edev(ibctx->device); int ret; struct erdma_uresp_alloc_ctx uresp = {}; - bool ext_db_en; if (atomic_inc_return(&dev->num_ctx) > ERDMA_MAX_CONTEXT) { ret = -ENOMEM; @@ -1289,25 +1245,11 @@ int erdma_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *udata) INIT_LIST_HEAD(&ctx->dbrecords_page_list); mutex_init(&ctx->dbrecords_page_mutex); - /* - * CAP_SYS_RAWIO is required if hardware does not support extend - * doorbell mechanism. - */ - ext_db_en = !!(dev->attrs.cap_flags & ERDMA_DEV_CAP_FLAGS_EXTEND_DB); - if (!ext_db_en && !capable(CAP_SYS_RAWIO)) { - ret = -EPERM; + ret = alloc_db_resources(dev, ctx, + !!(dev->attrs.cap_flags & + ERDMA_DEV_CAP_FLAGS_EXTEND_DB)); + if (ret) goto err_out; - } - - if (ext_db_en) { - ret = alloc_ext_db_resources(dev, ctx); - if (ret) - goto err_out; - } else { - alloc_db_resources(dev, ctx); - ctx->rdb = dev->func_bar_addr + ERDMA_BAR_RQDB_SPACE_OFFSET; - ctx->cdb = dev->func_bar_addr + ERDMA_BAR_CQDB_SPACE_OFFSET; - } ctx->sq_db_mmap_entry = erdma_user_mmap_entry_insert( ctx, (void *)ctx->sdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.sdb); @@ -1331,8 +1273,6 @@ int erdma_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *udata) } uresp.dev_id = dev->pdev->device; - uresp.sdb_type = ctx->sdb_type; - uresp.sdb_offset = ctx->sdb_page_off; ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); if (ret) @@ -1344,8 +1284,7 @@ err_put_mmap_entries: erdma_uctx_user_mmap_entries_remove(ctx); err_free_ext_db: - if (ext_db_en) - free_ext_db_resources(dev, ctx); + free_db_resources(dev, ctx); err_out: atomic_dec(&dev->num_ctx); @@ -1354,22 +1293,11 @@ err_out: void erdma_dealloc_ucontext(struct ib_ucontext *ibctx) { - struct erdma_ucontext *ctx = to_ectx(ibctx); struct erdma_dev *dev = to_edev(ibctx->device); + struct erdma_ucontext *ctx = to_ectx(ibctx); erdma_uctx_user_mmap_entries_remove(ctx); - - if (ctx->ext_db.enable) { - free_ext_db_resources(dev, ctx); - } else { - spin_lock(&dev->db_bitmap_lock); - if (ctx->sdb_type == ERDMA_SDB_PAGE) - clear_bit(ctx->sdb_idx, dev->sdb_page); - else if (ctx->sdb_type == ERDMA_SDB_ENTRY) - clear_bit(ctx->sdb_idx, dev->sdb_entry); - spin_unlock(&dev->db_bitmap_lock); - } - + free_db_resources(dev, ctx); atomic_dec(&dev->num_ctx); } |