1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2015 Intel Mobile Communications GmbH
9 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called COPYING.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 * BSD LICENSE
28 *
29 * Copyright(c) 2015 Intel Mobile Communications GmbH
30 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 *
37 * * Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * * Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in
41 * the documentation and/or other materials provided with the
42 * distribution.
43 * * Neither the name Intel Corporation nor the names of its
44 * contributors may be used to endorse or promote products derived
45 * from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 *
59 *****************************************************************************/
60 #include <linux/kernel.h>
61 #include <linux/bsearch.h>
62
63 #include "iwl-trans.h"
64 #include "iwl-drv.h"
65 #include "iwl-fh.h"
66
67 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
68 struct device *dev,
69 const struct iwl_trans_ops *ops,
70 unsigned int cmd_pool_size,
71 unsigned int cmd_pool_align)
72 {
73 struct iwl_trans *trans;
74 #ifdef CONFIG_LOCKDEP
75 static struct lock_class_key __key;
76 #endif
77
78 trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL);
79 if (!trans)
80 return NULL;
81
82 #ifdef CONFIG_LOCKDEP
83 lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
84 &__key, 0);
85 #endif
86
87 trans->dev = dev;
88 trans->ops = ops;
89 trans->num_rx_queues = 1;
90
91 snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
92 "iwl_cmd_pool:%s", dev_name(trans->dev));
93 trans->dev_cmd_pool =
94 kmem_cache_create(trans->dev_cmd_pool_name,
95 cmd_pool_size, cmd_pool_align,
96 SLAB_HWCACHE_ALIGN, NULL);
97 if (!trans->dev_cmd_pool)
98 return NULL;
99
100 WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
101
102 return trans;
103 }
104
105 void iwl_trans_free(struct iwl_trans *trans)
106 {
107 kmem_cache_destroy(trans->dev_cmd_pool);
108 }
109
110 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
111 {
112 int ret;
113
114 if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
115 test_bit(STATUS_RFKILL_OPMODE, &trans->status)))
116 return -ERFKILL;
117
118 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
119 return -EIO;
120
121 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
122 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
123 return -EIO;
124 }
125
126 if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) &&
127 !(cmd->flags & CMD_ASYNC)))
128 return -EINVAL;
129
130 if (!(cmd->flags & CMD_ASYNC))
131 lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
132
133 if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id))
134 cmd->id = DEF_ID(cmd->id);
135
136 ret = trans->ops->send_cmd(trans, cmd);
137
138 if (!(cmd->flags & CMD_ASYNC))
139 lock_map_release(&trans->sync_cmd_lockdep_map);
140
141 if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt))
142 return -EIO;
143
144 return ret;
145 }
146 IWL_EXPORT_SYMBOL(iwl_trans_send_cmd);
147
148 /* Comparator for struct iwl_hcmd_names.
149 * Used in the binary search over a list of host commands.
150 *
151 * @key: command_id that we're looking for.
152 * @elt: struct iwl_hcmd_names candidate for match.
153 *
154 * @return 0 iff equal.
155 */
156 static int iwl_hcmd_names_cmp(const void *key, const void *elt)
157 {
158 const struct iwl_hcmd_names *name = elt;
159 u8 cmd1 = *(u8 *)key;
160 u8 cmd2 = name->cmd_id;
161
162 return (cmd1 - cmd2);
163 }
164
165 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id)
166 {
167 u8 grp, cmd;
168 struct iwl_hcmd_names *ret;
169 const struct iwl_hcmd_arr *arr;
170 size_t size = sizeof(struct iwl_hcmd_names);
171
172 grp = iwl_cmd_groupid(id);
173 cmd = iwl_cmd_opcode(id);
174
175 if (!trans->command_groups || grp >= trans->command_groups_size ||
176 !trans->command_groups[grp].arr)
177 return "UNKNOWN";
178
179 arr = &trans->command_groups[grp];
180 ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp);
181 if (!ret)
182 return "UNKNOWN";
183 return ret->cmd_name;
184 }
185 IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
186
187 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans)
188 {
189 int i, j;
190 const struct iwl_hcmd_arr *arr;
191
192 for (i = 0; i < trans->command_groups_size; i++) {
193 arr = &trans->command_groups[i];
194 if (!arr->arr)
195 continue;
196 for (j = 0; j < arr->size - 1; j++)
197 if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id)
198 return -1;
199 }
200 return 0;
201 }
202 IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);