net/mlx4_en: Move filters cleanup to a proper location
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / iwl-trans.c
blob6069a9ff53fa8c751f68c338e9374f402810a89b
1 /******************************************************************************
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.
6 * GPL LICENSE SUMMARY
8 * Copyright(c) 2015 Intel Mobile Communications GmbH
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
27 * Contact Information:
28 * Intel Linux Wireless <linuxwifi@intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 * BSD LICENSE
33 * Copyright(c) 2015 Intel Mobile Communications GmbH
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
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48 * from this software without specific prior written permission.
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56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/kernel.h>
64 #include <linux/bsearch.h>
66 #include "iwl-trans.h"
67 #include "iwl-drv.h"
69 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
70 struct device *dev,
71 const struct iwl_cfg *cfg,
72 const struct iwl_trans_ops *ops,
73 size_t dev_cmd_headroom)
75 struct iwl_trans *trans;
76 #ifdef CONFIG_LOCKDEP
77 static struct lock_class_key __key;
78 #endif
80 trans = kzalloc(sizeof(*trans) + priv_size, GFP_KERNEL);
81 if (!trans)
82 return NULL;
84 #ifdef CONFIG_LOCKDEP
85 lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
86 &__key, 0);
87 #endif
89 trans->dev = dev;
90 trans->cfg = cfg;
91 trans->ops = ops;
92 trans->dev_cmd_headroom = dev_cmd_headroom;
93 trans->num_rx_queues = 1;
95 snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
96 "iwl_cmd_pool:%s", dev_name(trans->dev));
97 trans->dev_cmd_pool =
98 kmem_cache_create(trans->dev_cmd_pool_name,
99 sizeof(struct iwl_device_cmd)
100 + trans->dev_cmd_headroom,
101 sizeof(void *),
102 SLAB_HWCACHE_ALIGN,
103 NULL);
104 if (!trans->dev_cmd_pool)
105 goto free;
107 return trans;
108 free:
109 kfree(trans);
110 return NULL;
113 void iwl_trans_free(struct iwl_trans *trans)
115 kmem_cache_destroy(trans->dev_cmd_pool);
116 kfree(trans);
119 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
121 int ret;
123 if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
124 test_bit(STATUS_RFKILL, &trans->status)))
125 return -ERFKILL;
127 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
128 return -EIO;
130 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
131 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
132 return -EIO;
135 if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) &&
136 !(cmd->flags & CMD_ASYNC)))
137 return -EINVAL;
139 if (!(cmd->flags & CMD_ASYNC))
140 lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
142 ret = trans->ops->send_cmd(trans, cmd);
144 if (!(cmd->flags & CMD_ASYNC))
145 lock_map_release(&trans->sync_cmd_lockdep_map);
147 return ret;
149 IWL_EXPORT_SYMBOL(iwl_trans_send_cmd);
151 /* Comparator for struct iwl_hcmd_names.
152 * Used in the binary search over a list of host commands.
154 * @key: command_id that we're looking for.
155 * @elt: struct iwl_hcmd_names candidate for match.
157 * @return 0 iff equal.
159 static int iwl_hcmd_names_cmp(const void *key, const void *elt)
161 const struct iwl_hcmd_names *name = elt;
162 u8 cmd1 = *(u8 *)key;
163 u8 cmd2 = name->cmd_id;
165 return (cmd1 - cmd2);
168 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id)
170 u8 grp, cmd;
171 struct iwl_hcmd_names *ret;
172 const struct iwl_hcmd_arr *arr;
173 size_t size = sizeof(struct iwl_hcmd_names);
175 grp = iwl_cmd_groupid(id);
176 cmd = iwl_cmd_opcode(id);
178 if (!trans->command_groups || grp >= trans->command_groups_size ||
179 !trans->command_groups[grp].arr)
180 return "UNKNOWN";
182 arr = &trans->command_groups[grp];
183 ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp);
184 if (!ret)
185 return "UNKNOWN";
186 return ret->cmd_name;
188 IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
190 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans)
192 int i, j;
193 const struct iwl_hcmd_arr *arr;
195 for (i = 0; i < trans->command_groups_size; i++) {
196 arr = &trans->command_groups[i];
197 if (!arr->arr)
198 continue;
199 for (j = 0; j < arr->size - 1; j++)
200 if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id)
201 return -1;
203 return 0;
205 IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);