1 /*
2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  *
32  */
33 
34 #include <linux/slab.h>
35 #include <linux/vmalloc.h>
36 #include <linux/mlx4/qp.h>
37 
38 #include "mlx4_en.h"
39 
40 void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
41 			     int is_tx, int rss, int qpn, int cqn,
42 			     int user_prio, struct mlx4_qp_context *context)
43 {
44 	struct mlx4_en_dev *mdev = priv->mdev;
45 	struct net_device *dev = priv->dev;
46 
47 	memset(context, 0, sizeof *context);
48 	context->flags = cpu_to_be32(7 << 16 | rss << MLX4_RSS_QPC_FLAG_OFFSET);
49 	context->pd = cpu_to_be32(mdev->priv_pdn);
50 	context->mtu_msgmax = 0xff;
51 	if (!is_tx && !rss)
52 		context->rq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
53 	if (is_tx) {
54 		context->sq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
55 		if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP)
56 			context->params2 |= MLX4_QP_BIT_FPP;
57 
58 	} else {
59 		context->sq_size_stride = ilog2(TXBB_SIZE) - 4;
60 	}
61 	context->usr_page = cpu_to_be32(mdev->priv_uar.index);
62 	context->local_qpn = cpu_to_be32(qpn);
63 	context->pri_path.ackto = 1 & 0x07;
64 	context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
65 	if (user_prio >= 0) {
66 		context->pri_path.sched_queue |= user_prio << 3;
67 		context->pri_path.feup = MLX4_FEUP_FORCE_ETH_UP;
68 	}
69 	context->pri_path.counter_index = priv->counter_index;
70 	context->cqn_send = cpu_to_be32(cqn);
71 	context->cqn_recv = cpu_to_be32(cqn);
72 	if (!rss &&
73 	    (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK) &&
74 	    context->pri_path.counter_index !=
75 			    MLX4_SINK_COUNTER_INDEX(mdev->dev)) {
76 		/* disable multicast loopback to qp with same counter */
77 		if (!(dev->features & NETIF_F_LOOPBACK))
78 			context->pri_path.fl |= MLX4_FL_ETH_SRC_CHECK_MC_LB;
79 		context->pri_path.control |= MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER;
80 	}
81 	context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
82 	if (!(dev->features & NETIF_F_HW_VLAN_CTAG_RX))
83 		context->param3 |= cpu_to_be32(1 << 30);
84 
85 	if (!is_tx && !rss &&
86 	    (mdev->dev->caps.tunnel_offload_mode ==  MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)) {
87 		en_dbg(HW, priv, "Setting RX qp %x tunnel mode to RX tunneled & non-tunneled\n", qpn);
88 		context->srqn = cpu_to_be32(7 << 28); /* this fills bits 30:28 */
89 	}
90 }
91 
92 int mlx4_en_change_mcast_lb(struct mlx4_en_priv *priv, struct mlx4_qp *qp,
93 			    int loopback)
94 {
95 	int ret;
96 	struct mlx4_update_qp_params qp_params;
97 
98 	memset(&qp_params, 0, sizeof(qp_params));
99 	if (!loopback)
100 		qp_params.flags = MLX4_UPDATE_QP_PARAMS_FLAGS_ETH_CHECK_MC_LB;
101 
102 	ret = mlx4_update_qp(priv->mdev->dev, qp->qpn,
103 			     MLX4_UPDATE_QP_ETH_SRC_CHECK_MC_LB,
104 			     &qp_params);
105 
106 	return ret;
107 }
108 
109 int mlx4_en_map_buffer(struct mlx4_buf *buf)
110 {
111 	struct page **pages;
112 	int i;
113 
114 	if (BITS_PER_LONG == 64 || buf->nbufs == 1)
115 		return 0;
116 
117 	pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
118 	if (!pages)
119 		return -ENOMEM;
120 
121 	for (i = 0; i < buf->nbufs; ++i)
122 		pages[i] = virt_to_page(buf->page_list[i].buf);
123 
124 	buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
125 	kfree(pages);
126 	if (!buf->direct.buf)
127 		return -ENOMEM;
128 
129 	return 0;
130 }
131 
132 void mlx4_en_unmap_buffer(struct mlx4_buf *buf)
133 {
134 	if (BITS_PER_LONG == 64 || buf->nbufs == 1)
135 		return;
136 
137 	vunmap(buf->direct.buf);
138 }
139 
140 void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
141 {
142     return;
143 }
144 
145