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.
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,
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
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
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
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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"
69 struct iwl_trans
*iwl_trans_alloc(unsigned int priv_size
,
71 const struct iwl_cfg
*cfg
,
72 const struct iwl_trans_ops
*ops
,
73 size_t dev_cmd_headroom
)
75 struct iwl_trans
*trans
;
77 static struct lock_class_key __key
;
80 trans
= kzalloc(sizeof(*trans
) + priv_size
, GFP_KERNEL
);
85 lockdep_init_map(&trans
->sync_cmd_lockdep_map
, "sync_cmd_lockdep_map",
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
));
98 kmem_cache_create(trans
->dev_cmd_pool_name
,
99 sizeof(struct iwl_device_cmd
)
100 + trans
->dev_cmd_headroom
,
104 if (!trans
->dev_cmd_pool
)
113 void iwl_trans_free(struct iwl_trans
*trans
)
115 kmem_cache_destroy(trans
->dev_cmd_pool
);
119 int iwl_trans_send_cmd(struct iwl_trans
*trans
, struct iwl_host_cmd
*cmd
)
123 if (unlikely(!(cmd
->flags
& CMD_SEND_IN_RFKILL
) &&
124 test_bit(STATUS_RFKILL
, &trans
->status
)))
127 if (unlikely(test_bit(STATUS_FW_ERROR
, &trans
->status
)))
130 if (unlikely(trans
->state
!= IWL_TRANS_FW_ALIVE
)) {
131 IWL_ERR(trans
, "%s bad state = %d\n", __func__
, trans
->state
);
135 if (WARN_ON((cmd
->flags
& CMD_WANT_ASYNC_CALLBACK
) &&
136 !(cmd
->flags
& CMD_ASYNC
)))
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
);
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
)
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
)
182 arr
= &trans
->command_groups
[grp
];
183 ret
= bsearch(&cmd
, arr
->arr
, arr
->size
, size
, iwl_hcmd_names_cmp
);
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
)
193 const struct iwl_hcmd_arr
*arr
;
195 for (i
= 0; i
< trans
->command_groups_size
; i
++) {
196 arr
= &trans
->command_groups
[i
];
199 for (j
= 0; j
< arr
->size
- 1; j
++)
200 if (arr
->arr
[j
].cmd_id
> arr
->arr
[j
+ 1].cmd_id
)
205 IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted
);