mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC

The Mellanox ConnectX can operate as an InfiniBand adapter, as an
Ethernet NIC, or as a Fibre Channel (FC) HBA.  The kernel has a
low-level driver, mlx4_core, which handles multiplexing access to the
device, and there is also already an InfiniBad driver, mlx4_ib.

This patch adds a new driver, mlx4_en, which implements a standard
Ethernet NIC driver.

Signed-off-by: Liran Liss <liranl@mellanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/net/mlx4/en_resources.c b/drivers/net/mlx4/en_resources.c
new file mode 100644
index 000000000000..a0545209e507
--- /dev/null
+++ b/drivers/net/mlx4/en_resources.c
@@ -0,0 +1,96 @@
+/*
+ * 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/vmalloc.h>
+#include <linux/mlx4/qp.h>
+
+#include "mlx4_en.h"
+
+void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
+                             int is_tx, int rss, int qpn, int cqn, int srqn,
+                             struct mlx4_qp_context *context)
+{
+        struct mlx4_en_dev *mdev = priv->mdev;
+
+        memset(context, 0, sizeof *context);
+        context->flags = cpu_to_be32(7 << 16 | rss << 13);
+        context->pd = cpu_to_be32(mdev->priv_pdn);
+        context->mtu_msgmax = 0xff;
+        context->rq_size_stride = 0;
+        if (is_tx)
+                context->sq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
+        else
+                context->sq_size_stride = 1;
+        context->usr_page = cpu_to_be32(mdev->priv_uar.index);
+        context->local_qpn = cpu_to_be32(qpn);
+        context->pri_path.ackto = 1 & 0x07;
+        context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
+        context->pri_path.counter_index = 0xff;
+        context->cqn_send = cpu_to_be32(cqn);
+        context->cqn_recv = cpu_to_be32(cqn);
+        context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
+        if (!rss)
+                context->srqn = cpu_to_be32(MLX4_EN_USE_SRQ | srqn);
+}
+
+
+int mlx4_en_map_buffer(struct mlx4_buf *buf)
+{
+        struct page **pages;
+        int i;
+
+        if (BITS_PER_LONG == 64 || buf->nbufs == 1)
+                return 0;
+
+        pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
+        if (!pages)
+                return -ENOMEM;
+
+        for (i = 0; i < buf->nbufs; ++i)
+                pages[i] = virt_to_page(buf->page_list[i].buf);
+
+        buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
+        kfree(pages);
+        if (!buf->direct.buf)
+                return -ENOMEM;
+
+        return 0;
+}
+
+void mlx4_en_unmap_buffer(struct mlx4_buf *buf)
+{
+        if (BITS_PER_LONG == 64 || buf->nbufs == 1)
+                return;
+
+        vunmap(buf->direct.buf);
+}