46 static void *get_wqe(struct mlx5_ib_srq *srq, int n)  in get_wqe()  argument
48 	return mlx5_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);  in get_wqe()
51 static void mlx5_ib_srq_event(struct mlx5_core_srq *srq, enum mlx5_event type)  in mlx5_ib_srq_event()  argument
54 	struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq;  in mlx5_ib_srq_event()
58 		event.element.srq = ibsrq;  in mlx5_ib_srq_event()
68 				type, srq->srqn);  in mlx5_ib_srq_event()
76 static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,  in create_srq_user()  argument
103 	srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE);  in create_srq_user()
105 	srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, buf_size,  in create_srq_user()
107 	if (IS_ERR(srq->umem)) {  in create_srq_user()
109 		err = PTR_ERR(srq->umem);  in create_srq_user()
113 	mlx5_ib_cont_pages(srq->umem, ucmd.buf_addr, &npages,  in create_srq_user()
129 	mlx5_ib_populate_pas(dev, srq->umem, page_shift, (*in)->pas, 0);  in create_srq_user()
132 				  ucmd.db_addr, &srq->db);  in create_srq_user()
147 	ib_umem_release(srq->umem);  in create_srq_user()
152 static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq,  in create_srq_kernel()  argument
162 	err = mlx5_db_alloc(dev->mdev, &srq->db);  in create_srq_kernel()
168 	*srq->db.db = 0;  in create_srq_kernel()
170 	if (mlx5_buf_alloc(dev->mdev, buf_size, PAGE_SIZE * 2, &srq->buf)) {  in create_srq_kernel()
175 	page_shift = srq->buf.page_shift;  in create_srq_kernel()
177 	srq->head    = 0;  in create_srq_kernel()
178 	srq->tail    = srq->msrq.max - 1;  in create_srq_kernel()
179 	srq->wqe_ctr = 0;  in create_srq_kernel()
181 	for (i = 0; i < srq->msrq.max; i++) {  in create_srq_kernel()
182 		next = get_wqe(srq, i);  in create_srq_kernel()
184 			cpu_to_be16((i + 1) & (srq->msrq.max - 1));  in create_srq_kernel()
187 	npages = DIV_ROUND_UP(srq->buf.npages, 1 << (page_shift - PAGE_SHIFT));  in create_srq_kernel()
189 		    buf_size, page_shift, srq->buf.npages, npages);  in create_srq_kernel()
196 	mlx5_fill_page_array(&srq->buf, (*in)->pas);  in create_srq_kernel()
198 	srq->wrid = kmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL);  in create_srq_kernel()
199 	if (!srq->wrid) {  in create_srq_kernel()
201 			    (unsigned long)(srq->msrq.max * sizeof(u64)));  in create_srq_kernel()
205 	srq->wq_sig = !!srq_signature;  in create_srq_kernel()
215 	mlx5_buf_free(dev->mdev, &srq->buf);  in create_srq_kernel()
218 	mlx5_db_free(dev->mdev, &srq->db);  in create_srq_kernel()
222 static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq)  in destroy_srq_user()  argument
224 	mlx5_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);  in destroy_srq_user()
225 	ib_umem_release(srq->umem);  in destroy_srq_user()
229 static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq)  in destroy_srq_kernel()  argument
231 	kfree(srq->wrid);  in destroy_srq_kernel()
232 	mlx5_buf_free(dev->mdev, &srq->buf);  in destroy_srq_kernel()
233 	mlx5_db_free(dev->mdev, &srq->db);  in destroy_srq_kernel()
242 	struct mlx5_ib_srq *srq;  in mlx5_ib_create_srq()  local
260 	srq = kmalloc(sizeof(*srq), GFP_KERNEL);  in mlx5_ib_create_srq()
261 	if (!srq)  in mlx5_ib_create_srq()
264 	mutex_init(&srq->mutex);  in mlx5_ib_create_srq()
265 	spin_lock_init(&srq->lock);  in mlx5_ib_create_srq()
266 	srq->msrq.max    = roundup_pow_of_two(init_attr->attr.max_wr + 1);  in mlx5_ib_create_srq()
267 	srq->msrq.max_gs = init_attr->attr.max_sge;  in mlx5_ib_create_srq()
270 		    srq->msrq.max_gs * sizeof(struct mlx5_wqe_data_seg);  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()
278 		    desc_size, init_attr->attr.max_wr, srq->msrq.max, srq->msrq.max_gs,  in mlx5_ib_create_srq()
279 		    srq->msrq.max_avail_gather);  in mlx5_ib_create_srq()
282 		err = create_srq_user(pd, srq, &in, udata, buf_size, &inlen);  in mlx5_ib_create_srq()
284 		err = create_srq_kernel(dev, srq, &in, buf_size, &inlen);  in mlx5_ib_create_srq()
293 	in->ctx.state_log_sz = ilog2(srq->msrq.max);  in mlx5_ib_create_srq()
294 	flgs = ((srq->msrq.wqe_shift - 4) | (is_xrc << 5) | (srq->wq_sig << 7)) << 24;  in mlx5_ib_create_srq()
307 	in->ctx.db_record = cpu_to_be64(srq->db.dma);  in mlx5_ib_create_srq()
308 	err = mlx5_core_create_srq(dev->mdev, &srq->msrq, in, inlen);  in mlx5_ib_create_srq()
315 	mlx5_ib_dbg(dev, "create SRQ with srqn 0x%x\n", srq->msrq.srqn);  in mlx5_ib_create_srq()
317 	srq->msrq.event = mlx5_ib_srq_event;  in mlx5_ib_create_srq()
318 	srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn;  in mlx5_ib_create_srq()
321 		if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof(__u32))) {  in mlx5_ib_create_srq()
327 	init_attr->attr.max_wr = srq->msrq.max - 1;  in mlx5_ib_create_srq()
329 	return &srq->ibsrq;  in mlx5_ib_create_srq()
332 	mlx5_core_destroy_srq(dev->mdev, &srq->msrq);  in mlx5_ib_create_srq()
336 		destroy_srq_user(pd, srq);  in mlx5_ib_create_srq()
338 		destroy_srq_kernel(dev, srq);  in mlx5_ib_create_srq()
341 	kfree(srq);  in mlx5_ib_create_srq()
350 	struct mlx5_ib_srq *srq = to_msrq(ibsrq);  in mlx5_ib_modify_srq()  local
358 		if (attr->srq_limit >= srq->msrq.max)  in mlx5_ib_modify_srq()
361 		mutex_lock(&srq->mutex);  in mlx5_ib_modify_srq()
362 		ret = mlx5_core_arm_srq(dev->mdev, &srq->msrq, attr->srq_limit, 1);  in mlx5_ib_modify_srq()
363 		mutex_unlock(&srq->mutex);  in mlx5_ib_modify_srq()
375 	struct mlx5_ib_srq *srq = to_msrq(ibsrq);  in mlx5_ib_query_srq()  local
383 	ret = mlx5_core_query_srq(dev->mdev, &srq->msrq, out);  in mlx5_ib_query_srq()
388 	srq_attr->max_wr    = srq->msrq.max - 1;  in mlx5_ib_query_srq()
389 	srq_attr->max_sge   = srq->msrq.max_gs;  in mlx5_ib_query_srq()
396 int mlx5_ib_destroy_srq(struct ib_srq *srq)  in mlx5_ib_destroy_srq()  argument
398 	struct mlx5_ib_dev *dev = to_mdev(srq->device);  in mlx5_ib_destroy_srq()
399 	struct mlx5_ib_srq *msrq = to_msrq(srq);  in mlx5_ib_destroy_srq()
403 	if (srq->uobject) {  in mlx5_ib_destroy_srq()
404 		mlx5_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);  in mlx5_ib_destroy_srq()
410 	kfree(srq);  in mlx5_ib_destroy_srq()
414 void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index)  in mlx5_ib_free_srq_wqe()  argument
419 	spin_lock(&srq->lock);  in mlx5_ib_free_srq_wqe()
421 	next = get_wqe(srq, srq->tail);  in mlx5_ib_free_srq_wqe()
423 	srq->tail = wqe_index;  in mlx5_ib_free_srq_wqe()
425 	spin_unlock(&srq->lock);  in mlx5_ib_free_srq_wqe()
431 	struct mlx5_ib_srq *srq = to_msrq(ibsrq);  in mlx5_ib_post_srq_recv()  local
439 	spin_lock_irqsave(&srq->lock, flags);  in mlx5_ib_post_srq_recv()
442 		if (unlikely(wr->num_sge > srq->msrq.max_gs)) {  in mlx5_ib_post_srq_recv()
448 		if (unlikely(srq->head == srq->tail)) {  in mlx5_ib_post_srq_recv()
454 		srq->wrid[srq->head] = wr->wr_id;  in mlx5_ib_post_srq_recv()
456 		next      = get_wqe(srq, srq->head);  in mlx5_ib_post_srq_recv()
457 		srq->head = be16_to_cpu(next->next_wqe_index);  in mlx5_ib_post_srq_recv()
466 		if (i < srq->msrq.max_avail_gather) {  in mlx5_ib_post_srq_recv()
474 		srq->wqe_ctr += nreq;  in mlx5_ib_post_srq_recv()
481 		*srq->db.db = cpu_to_be32(srq->wqe_ctr);  in mlx5_ib_post_srq_recv()
484 	spin_unlock_irqrestore(&srq->lock, flags);  in mlx5_ib_post_srq_recv()