Linux Kernel  3.7.1
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en_resources.c
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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 
46  memset(context, 0, sizeof *context);
47  context->flags = cpu_to_be32(7 << 16 | rss << MLX4_RSS_QPC_FLAG_OFFSET);
48  context->pd = cpu_to_be32(mdev->priv_pdn);
49  context->mtu_msgmax = 0xff;
50  if (!is_tx && !rss)
51  context->rq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
52  if (is_tx)
53  context->sq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
54  else
55  context->sq_size_stride = ilog2(TXBB_SIZE) - 4;
56  context->usr_page = cpu_to_be32(mdev->priv_uar.index);
57  context->local_qpn = cpu_to_be32(qpn);
58  context->pri_path.ackto = 1 & 0x07;
59  context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
60  if (user_prio >= 0) {
61  context->pri_path.sched_queue |= user_prio << 3;
62  context->pri_path.feup = 1 << 6;
63  }
64  context->pri_path.counter_index = 0xff;
65  context->cqn_send = cpu_to_be32(cqn);
66  context->cqn_recv = cpu_to_be32(cqn);
67  context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
68 }
69 
70 
72 {
73  struct page **pages;
74  int i;
75 
76  if (BITS_PER_LONG == 64 || buf->nbufs == 1)
77  return 0;
78 
79  pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
80  if (!pages)
81  return -ENOMEM;
82 
83  for (i = 0; i < buf->nbufs; ++i)
84  pages[i] = virt_to_page(buf->page_list[i].buf);
85 
86  buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
87  kfree(pages);
88  if (!buf->direct.buf)
89  return -ENOMEM;
90 
91  return 0;
92 }
93 
95 {
96  if (BITS_PER_LONG == 64 || buf->nbufs == 1)
97  return;
98 
99  vunmap(buf->direct.buf);
100 }
101 
103 {
104  return;
105 }
106