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Message-ID: <487B65C3.6000604@mellanox.co.il>
Date: Mon, 14 Jul 2008 17:42:11 +0300
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: jeff@...zik.org
CC: netdev@...r.kernel.org, Liran Liss <liranl@...lanox.co.il>,
tziporet@...lanox.co.il, Roland Dreier <rdreier@...co.com>
Subject: [PATCH RFC 08/10] mlx4_en: Completion queues management
This file implements Completion queues handling. The completion
queues are in use by both tx and rx rings.
Signed-off-by: Liran Liss <liranl@...lanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
drivers/net/mlx4/en_cq.c | 132 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 132 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/mlx4/en_cq.c
diff --git a/drivers/net/mlx4/en_cq.c b/drivers/net/mlx4/en_cq.c
new file mode 100644
index 0000000..cdd5bbc
--- /dev/null
+++ b/drivers/net/mlx4/en_cq.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/mlx4/cq.h>
+#include <linux/mlx4/qp.h>
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4_en.h"
+
+static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event)
+{
+ return;
+}
+
+
+int mlx4_en_create_cq(struct mlx4_en_priv *priv,
+ struct mlx4_en_cq *cq,
+ int entries, int ring, enum cq_type mode)
+{
+ struct mlx4_en_dev *mdev = priv->mdev;
+ int err;
+ unsigned vector;
+
+ cq->size = entries;
+ if (mode == RX) {
+ cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
+ vector = ring % mdev->dev->caps.num_comp_vectors;
+ } else {
+ cq->buf_size = sizeof(struct mlx4_cqe);
+ vector = MLX4_LEAST_ATTACHED_VECTOR;
+ }
+ cq->ring = ring;
+ cq->is_tx = mode;
+ cq->dev = mdev->pndev[priv->port];
+ spin_lock_init(&cq->lock);
+
+ err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres,
+ cq->buf_size, cq->buf_size);
+ if (err)
+ return err;
+ cq->mcq.set_ci_db = cq->wqres.db.db;
+ cq->mcq.arm_db = cq->wqres.db.db + 1;
+ *cq->mcq.set_ci_db = 0;
+ *cq->mcq.arm_db = 0;
+ cq->buf = (struct mlx4_en_cqe *) cq->wqres.buf.direct.buf;
+ memset(cq->buf, 0, cq->buf_size);
+
+ err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar,
+ cq->wqres.db.dma, &cq->mcq, vector, mode);
+ if (err)
+ goto err_man;
+
+ cq->mcq.comp = cq->is_tx ? NULL : mlx4_en_rx_irq;
+ cq->mcq.event = mlx4_en_cq_event;
+
+ if (cq->is_tx) {
+ init_timer(&cq->timer);
+ cq->timer.function = mlx4_en_poll_tx_cq;
+ cq->timer.data = (unsigned long) cq;
+ } else {
+ netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64);
+ napi_enable(&cq->napi);
+ }
+
+ return 0;
+
+err_man:
+ mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
+ return err;
+}
+
+void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
+{
+ struct mlx4_en_dev *mdev = priv->mdev;
+
+ if (cq->is_tx)
+ del_timer(&cq->timer);
+ else
+ napi_disable(&cq->napi);
+
+ mlx4_cq_free(mdev->dev, &cq->mcq);
+ mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
+ cq->buf_size = 0;
+ cq->buf = NULL;
+}
+
+/* Set rx cq moderation parameters */
+int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
+{
+ return mlx4_cq_modify(priv->mdev->dev, &cq->mcq,
+ cq->moder_cnt, cq->moder_cnt);
+}
+
+int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
+{
+ mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map,
+ &priv->mdev->uar_lock);
+
+ return 0;
+}
+
+
--
1.5.3.7
--
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