15a2cc190SJeff Kirsher /* 25a2cc190SJeff Kirsher * Copyright (c) 2007 Mellanox Technologies. All rights reserved. 35a2cc190SJeff Kirsher * 45a2cc190SJeff Kirsher * This software is available to you under a choice of one of two 55a2cc190SJeff Kirsher * licenses. You may choose to be licensed under the terms of the GNU 65a2cc190SJeff Kirsher * General Public License (GPL) Version 2, available from the file 75a2cc190SJeff Kirsher * COPYING in the main directory of this source tree, or the 85a2cc190SJeff Kirsher * OpenIB.org BSD license below: 95a2cc190SJeff Kirsher * 105a2cc190SJeff Kirsher * Redistribution and use in source and binary forms, with or 115a2cc190SJeff Kirsher * without modification, are permitted provided that the following 125a2cc190SJeff Kirsher * conditions are met: 135a2cc190SJeff Kirsher * 145a2cc190SJeff Kirsher * - Redistributions of source code must retain the above 155a2cc190SJeff Kirsher * copyright notice, this list of conditions and the following 165a2cc190SJeff Kirsher * disclaimer. 175a2cc190SJeff Kirsher * 185a2cc190SJeff Kirsher * - Redistributions in binary form must reproduce the above 195a2cc190SJeff Kirsher * copyright notice, this list of conditions and the following 205a2cc190SJeff Kirsher * disclaimer in the documentation and/or other materials 215a2cc190SJeff Kirsher * provided with the distribution. 225a2cc190SJeff Kirsher * 235a2cc190SJeff Kirsher * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 245a2cc190SJeff Kirsher * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 255a2cc190SJeff Kirsher * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 265a2cc190SJeff Kirsher * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 275a2cc190SJeff Kirsher * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 285a2cc190SJeff Kirsher * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 295a2cc190SJeff Kirsher * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 305a2cc190SJeff Kirsher * SOFTWARE. 315a2cc190SJeff Kirsher * 325a2cc190SJeff Kirsher */ 335a2cc190SJeff Kirsher 345a2cc190SJeff Kirsher #include <linux/mlx4/cq.h> 355a2cc190SJeff Kirsher #include <linux/mlx4/qp.h> 365a2cc190SJeff Kirsher #include <linux/mlx4/cmd.h> 375a2cc190SJeff Kirsher 385a2cc190SJeff Kirsher #include "mlx4_en.h" 395a2cc190SJeff Kirsher 405a2cc190SJeff Kirsher static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event) 415a2cc190SJeff Kirsher { 425a2cc190SJeff Kirsher return; 435a2cc190SJeff Kirsher } 445a2cc190SJeff Kirsher 455a2cc190SJeff Kirsher 465a2cc190SJeff Kirsher int mlx4_en_create_cq(struct mlx4_en_priv *priv, 475a2cc190SJeff Kirsher struct mlx4_en_cq *cq, 485a2cc190SJeff Kirsher int entries, int ring, enum cq_type mode) 495a2cc190SJeff Kirsher { 505a2cc190SJeff Kirsher struct mlx4_en_dev *mdev = priv->mdev; 515a2cc190SJeff Kirsher int err; 525a2cc190SJeff Kirsher 535a2cc190SJeff Kirsher cq->size = entries; 545a2cc190SJeff Kirsher cq->buf_size = cq->size * sizeof(struct mlx4_cqe); 555a2cc190SJeff Kirsher 565a2cc190SJeff Kirsher cq->ring = ring; 575a2cc190SJeff Kirsher cq->is_tx = mode; 585a2cc190SJeff Kirsher spin_lock_init(&cq->lock); 595a2cc190SJeff Kirsher 605a2cc190SJeff Kirsher err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, 615a2cc190SJeff Kirsher cq->buf_size, 2 * PAGE_SIZE); 625a2cc190SJeff Kirsher if (err) 635a2cc190SJeff Kirsher return err; 645a2cc190SJeff Kirsher 655a2cc190SJeff Kirsher err = mlx4_en_map_buffer(&cq->wqres.buf); 665a2cc190SJeff Kirsher if (err) 675a2cc190SJeff Kirsher mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 685a2cc190SJeff Kirsher else 695a2cc190SJeff Kirsher cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf; 705a2cc190SJeff Kirsher 715a2cc190SJeff Kirsher return err; 725a2cc190SJeff Kirsher } 735a2cc190SJeff Kirsher 7476532d0cSAlexander Guller int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, 7576532d0cSAlexander Guller int cq_idx) 765a2cc190SJeff Kirsher { 775a2cc190SJeff Kirsher struct mlx4_en_dev *mdev = priv->mdev; 785a2cc190SJeff Kirsher int err = 0; 795a2cc190SJeff Kirsher char name[25]; 805a2cc190SJeff Kirsher 815a2cc190SJeff Kirsher cq->dev = mdev->pndev[priv->port]; 825a2cc190SJeff Kirsher cq->mcq.set_ci_db = cq->wqres.db.db; 835a2cc190SJeff Kirsher cq->mcq.arm_db = cq->wqres.db.db + 1; 845a2cc190SJeff Kirsher *cq->mcq.set_ci_db = 0; 855a2cc190SJeff Kirsher *cq->mcq.arm_db = 0; 865a2cc190SJeff Kirsher memset(cq->buf, 0, cq->buf_size); 875a2cc190SJeff Kirsher 885a2cc190SJeff Kirsher if (cq->is_tx == RX) { 895a2cc190SJeff Kirsher if (mdev->dev->caps.comp_pool) { 905a2cc190SJeff Kirsher if (!cq->vector) { 9176532d0cSAlexander Guller sprintf(name, "%s-%d", priv->dev->name, 9276532d0cSAlexander Guller cq->ring); 9376532d0cSAlexander Guller /* Set IRQ for specific name (per ring) */ 94d9236c3fSAmir Vadai if (mlx4_assign_eq(mdev->dev, name, NULL, 95d9236c3fSAmir Vadai &cq->vector)) { 9676532d0cSAlexander Guller cq->vector = (cq->ring + 1 + priv->port) 9776532d0cSAlexander Guller % mdev->dev->caps.num_comp_vectors; 985a2cc190SJeff Kirsher mlx4_warn(mdev, "Failed Assigning an EQ to " 9976532d0cSAlexander Guller "%s ,Falling back to legacy EQ's\n", 10076532d0cSAlexander Guller name); 1015a2cc190SJeff Kirsher } 1025a2cc190SJeff Kirsher } 1035a2cc190SJeff Kirsher } else { 1045a2cc190SJeff Kirsher cq->vector = (cq->ring + 1 + priv->port) % 1055a2cc190SJeff Kirsher mdev->dev->caps.num_comp_vectors; 1065a2cc190SJeff Kirsher } 1075a2cc190SJeff Kirsher } else { 10876532d0cSAlexander Guller /* For TX we use the same irq per 10976532d0cSAlexander Guller ring we assigned for the RX */ 11076532d0cSAlexander Guller struct mlx4_en_cq *rx_cq; 11176532d0cSAlexander Guller 11276532d0cSAlexander Guller cq_idx = cq_idx % priv->rx_ring_num; 11376532d0cSAlexander Guller rx_cq = &priv->rx_cq[cq_idx]; 11476532d0cSAlexander Guller cq->vector = rx_cq->vector; 1155a2cc190SJeff Kirsher } 1165a2cc190SJeff Kirsher 1175a2cc190SJeff Kirsher if (!cq->is_tx) 1185a2cc190SJeff Kirsher cq->size = priv->rx_ring[cq->ring].actual_size; 1195a2cc190SJeff Kirsher 1205a2cc190SJeff Kirsher err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar, 121f0ab34f0SYevgeny Petrilin cq->wqres.db.dma, &cq->mcq, cq->vector, 0); 1225a2cc190SJeff Kirsher if (err) 1235a2cc190SJeff Kirsher return err; 1245a2cc190SJeff Kirsher 1255a2cc190SJeff Kirsher cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq; 1265a2cc190SJeff Kirsher cq->mcq.event = mlx4_en_cq_event; 1275a2cc190SJeff Kirsher 128e22979d9SYevgeny Petrilin if (!cq->is_tx) { 1295a2cc190SJeff Kirsher netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); 1305a2cc190SJeff Kirsher napi_enable(&cq->napi); 1315a2cc190SJeff Kirsher } 1325a2cc190SJeff Kirsher 1335a2cc190SJeff Kirsher return 0; 1345a2cc190SJeff Kirsher } 1355a2cc190SJeff Kirsher 136fe0af03cSAlexander Guller void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 1375a2cc190SJeff Kirsher { 1385a2cc190SJeff Kirsher struct mlx4_en_dev *mdev = priv->mdev; 1395a2cc190SJeff Kirsher 1405a2cc190SJeff Kirsher mlx4_en_unmap_buffer(&cq->wqres.buf); 1415a2cc190SJeff Kirsher mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 142fe0af03cSAlexander Guller if (priv->mdev->dev->caps.comp_pool && cq->vector) 1435a2cc190SJeff Kirsher mlx4_release_eq(priv->mdev->dev, cq->vector); 144cd3109d2SYevgeny Petrilin cq->vector = 0; 1455a2cc190SJeff Kirsher cq->buf_size = 0; 1465a2cc190SJeff Kirsher cq->buf = NULL; 1475a2cc190SJeff Kirsher } 1485a2cc190SJeff Kirsher 1495a2cc190SJeff Kirsher void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 1505a2cc190SJeff Kirsher { 151e22979d9SYevgeny Petrilin if (!cq->is_tx) { 1525a2cc190SJeff Kirsher napi_disable(&cq->napi); 1535a2cc190SJeff Kirsher netif_napi_del(&cq->napi); 1545a2cc190SJeff Kirsher } 1555a2cc190SJeff Kirsher 156e22979d9SYevgeny Petrilin mlx4_cq_free(priv->mdev->dev, &cq->mcq); 1575a2cc190SJeff Kirsher } 1585a2cc190SJeff Kirsher 1595a2cc190SJeff Kirsher /* Set rx cq moderation parameters */ 1605a2cc190SJeff Kirsher int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 1615a2cc190SJeff Kirsher { 1625a2cc190SJeff Kirsher return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 1635a2cc190SJeff Kirsher cq->moder_cnt, cq->moder_time); 1645a2cc190SJeff Kirsher } 1655a2cc190SJeff Kirsher 1665a2cc190SJeff Kirsher int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 1675a2cc190SJeff Kirsher { 1685a2cc190SJeff Kirsher mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, 1695a2cc190SJeff Kirsher &priv->mdev->uar_lock); 1705a2cc190SJeff Kirsher 1715a2cc190SJeff Kirsher return 0; 1725a2cc190SJeff Kirsher } 1735a2cc190SJeff Kirsher 1745a2cc190SJeff Kirsher 175