39 static void *get_wqe(struct mlx5_ib_srq *srq, int n)  in get_wqe()  argument
41 	return mlx5_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);  in get_wqe()
44 static void mlx5_ib_srq_event(struct mlx5_core_srq *srq, int type)  in mlx5_ib_srq_event()  argument
47 	struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq;  in mlx5_ib_srq_event()
51 		event.element.srq = ibsrq;  in mlx5_ib_srq_event()
61 				type, srq->srqn);  in mlx5_ib_srq_event()
69 static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,  in create_srq_user()  argument
106 	srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE);  in create_srq_user()
108 	srq->umem = ib_umem_get(&ucontext->ibucontext, ucmd.buf_addr, buf_size, 0, 0);  in create_srq_user()
109 	if (IS_ERR(srq->umem)) {  in create_srq_user()
111 		err = PTR_ERR(srq->umem);  in create_srq_user()
115 	mlx5_ib_cont_pages(srq->umem, ucmd.buf_addr, 0, &npages,  in create_srq_user()
130 	mlx5_ib_populate_pas(dev, srq->umem, page_shift, in->pas, 0);  in create_srq_user()
132 	err = mlx5_ib_db_map_user(ucontext, ucmd.db_addr, &srq->db);  in create_srq_user()
151 	ib_umem_release(srq->umem);  in create_srq_user()
156 static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq,  in create_srq_kernel()  argument
163 	err = mlx5_db_alloc(dev->mdev, &srq->db);  in create_srq_kernel()
169 	if (mlx5_buf_alloc(dev->mdev, buf_size, 2 * PAGE_SIZE, &srq->buf)) {  in create_srq_kernel()
175 	srq->head    = 0;  in create_srq_kernel()
176 	srq->tail    = srq->msrq.max - 1;  in create_srq_kernel()
177 	srq->wqe_ctr = 0;  in create_srq_kernel()
179 	for (i = 0; i < srq->msrq.max; i++) {  in create_srq_kernel()
180 		next = get_wqe(srq, i);  in create_srq_kernel()
182 			cpu_to_be16((i + 1) & (srq->msrq.max - 1));  in create_srq_kernel()
185 	mlx5_ib_dbg(dev, "srq->buf.page_shift = %d\n", srq->buf.page_shift);  in create_srq_kernel()
186 	in->pas = mlx5_vzalloc(sizeof(*in->pas) * srq->buf.npages);  in create_srq_kernel()
191 	mlx5_fill_page_array(&srq->buf, in->pas);  in create_srq_kernel()
193 	srq->wrid = kmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL);  in create_srq_kernel()
194 	if (!srq->wrid) {  in create_srq_kernel()
198 	srq->wq_sig = 0;  in create_srq_kernel()
200 	in->log_page_size = srq->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT;  in create_srq_kernel()
211 	mlx5_buf_free(dev->mdev, &srq->buf);  in create_srq_kernel()
214 	mlx5_db_free(dev->mdev, &srq->db);  in create_srq_kernel()
218 static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,  in destroy_srq_user()  argument
226 		&srq->db);  in destroy_srq_user()
227 	ib_umem_release(srq->umem);  in destroy_srq_user()
231 static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq)  in destroy_srq_kernel()  argument
233 	kfree(srq->wrid);  in destroy_srq_kernel()
234 	mlx5_buf_free(dev->mdev, &srq->buf);  in destroy_srq_kernel()
235 	mlx5_db_free(dev->mdev, &srq->db);  in destroy_srq_kernel()
243 	struct mlx5_ib_srq *srq = to_msrq(ib_srq);  in mlx5_ib_create_srq()  local
258 	mutex_init(&srq->mutex);  in mlx5_ib_create_srq()
259 	spin_lock_init(&srq->lock);  in mlx5_ib_create_srq()
260 	srq->msrq.max    = roundup_pow_of_two(init_attr->attr.max_wr + 1);  in mlx5_ib_create_srq()
261 	srq->msrq.max_gs = init_attr->attr.max_sge;  in mlx5_ib_create_srq()
264 		    srq->msrq.max_gs * sizeof(struct mlx5_wqe_data_seg);  in mlx5_ib_create_srq()
265 	if (desc_size == 0 || srq->msrq.max_gs > desc_size)  in mlx5_ib_create_srq()
273 	srq->msrq.max_avail_gather = (desc_size - sizeof(struct mlx5_wqe_srq_next_seg)) /  in mlx5_ib_create_srq()
275 	srq->msrq.wqe_shift = ilog2(desc_size);  in mlx5_ib_create_srq()
276 	buf_size = srq->msrq.max * desc_size;  in mlx5_ib_create_srq()
283 		err = create_srq_user(ib_srq->pd, srq, &in, udata, buf_size);  in mlx5_ib_create_srq()
285 		err = create_srq_kernel(dev, srq, &in, buf_size);  in mlx5_ib_create_srq()
293 	in.log_size = ilog2(srq->msrq.max);  in mlx5_ib_create_srq()
294 	in.wqe_shift = srq->msrq.wqe_shift - 4;  in mlx5_ib_create_srq()
295 	if (srq->wq_sig)  in mlx5_ib_create_srq()
309 	in.db_record = srq->db.dma;  in mlx5_ib_create_srq()
310 	err = mlx5_core_create_srq(dev->mdev, &srq->msrq, &in);  in mlx5_ib_create_srq()
317 	mlx5_ib_dbg(dev, "create SRQ with srqn 0x%x\n", srq->msrq.srqn);  in mlx5_ib_create_srq()
319 	srq->msrq.event = mlx5_ib_srq_event;  in mlx5_ib_create_srq()
320 	srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn;  in mlx5_ib_create_srq()
323 		if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof(__u32))) {  in mlx5_ib_create_srq()
329 	init_attr->attr.max_wr = srq->msrq.max - 1;  in mlx5_ib_create_srq()
334 	mlx5_core_destroy_srq(dev->mdev, &srq->msrq);  in mlx5_ib_create_srq()
338 		destroy_srq_user(ib_srq->pd, srq, udata);  in mlx5_ib_create_srq()
340 		destroy_srq_kernel(dev, srq);  in mlx5_ib_create_srq()
349 	struct mlx5_ib_srq *srq = to_msrq(ibsrq);  in mlx5_ib_modify_srq()  local
357 		if (attr->srq_limit >= srq->msrq.max)  in mlx5_ib_modify_srq()
360 		mutex_lock(&srq->mutex);  in mlx5_ib_modify_srq()
361 		ret = mlx5_core_arm_srq(dev->mdev, &srq->msrq, attr->srq_limit, 1);  in mlx5_ib_modify_srq()
362 		mutex_unlock(&srq->mutex);  in mlx5_ib_modify_srq()
374 	struct mlx5_ib_srq *srq = to_msrq(ibsrq);  in mlx5_ib_query_srq()  local
382 	ret = mlx5_core_query_srq(dev->mdev, &srq->msrq, out);  in mlx5_ib_query_srq()
387 	srq_attr->max_wr    = srq->msrq.max - 1;  in mlx5_ib_query_srq()
388 	srq_attr->max_sge   = srq->msrq.max_gs;  in mlx5_ib_query_srq()
395 void mlx5_ib_destroy_srq(struct ib_srq *srq, struct ib_udata *udata)  in mlx5_ib_destroy_srq()  argument
397 	struct mlx5_ib_dev *dev = to_mdev(srq->device);  in mlx5_ib_destroy_srq()
398 	struct mlx5_ib_srq *msrq = to_msrq(srq);  in mlx5_ib_destroy_srq()
402 	if (srq->uobject) {  in mlx5_ib_destroy_srq()
415 void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index)  in mlx5_ib_free_srq_wqe()  argument
420 	spin_lock(&srq->lock);  in mlx5_ib_free_srq_wqe()
422 	next = get_wqe(srq, srq->tail);  in mlx5_ib_free_srq_wqe()
424 	srq->tail = wqe_index;  in mlx5_ib_free_srq_wqe()
426 	spin_unlock(&srq->lock);  in mlx5_ib_free_srq_wqe()
432 	struct mlx5_ib_srq *srq = to_msrq(ibsrq);  in mlx5_ib_post_srq_recv()  local
442 	spin_lock_irqsave(&srq->lock, flags);  in mlx5_ib_post_srq_recv()
451 		if (unlikely(wr->num_sge > srq->msrq.max_gs)) {  in mlx5_ib_post_srq_recv()
457 		if (unlikely(srq->head == srq->tail)) {  in mlx5_ib_post_srq_recv()
463 		srq->wrid[srq->head] = wr->wr_id;  in mlx5_ib_post_srq_recv()
465 		next      = get_wqe(srq, srq->head);  in mlx5_ib_post_srq_recv()
466 		srq->head = be16_to_cpu(next->next_wqe_index);  in mlx5_ib_post_srq_recv()
475 		if (i < srq->msrq.max_avail_gather) {  in mlx5_ib_post_srq_recv()
483 		srq->wqe_ctr += nreq;  in mlx5_ib_post_srq_recv()
490 		*srq->db.db = cpu_to_be32(srq->wqe_ctr);  in mlx5_ib_post_srq_recv()
493 	spin_unlock_irqrestore(&srq->lock, flags);  in mlx5_ib_post_srq_recv()