1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2015 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
* Copyright (C) 2019-2020 Intel Corporation
*/
#include <linux/kernel.h>
#include <linux/bsearch.h>
#include "fw/api/tx.h"
#include "iwl-trans.h"
#include "iwl-drv.h"
#include "iwl-fh.h"
#include "queue/tx.h"
#include <linux/dmapool.h>
struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
struct device *dev,
const struct iwl_trans_ops *ops,
const struct iwl_cfg_trans_params *cfg_trans)
{
struct iwl_trans *trans;
int txcmd_size, txcmd_align;
#ifdef CONFIG_LOCKDEP
static struct lock_class_key __key;
#endif
trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL);
if (!trans)
return NULL;
trans->trans_cfg = cfg_trans;
if (!cfg_trans->gen2) {
txcmd_size = sizeof(struct iwl_tx_cmd);
txcmd_align = sizeof(void *);
} else if (cfg_trans->device_family < IWL_DEVICE_FAMILY_AX210) {
txcmd_size = sizeof(struct iwl_tx_cmd_gen2);
txcmd_align = 64;
} else {
txcmd_size = sizeof(struct iwl_tx_cmd_gen3);
txcmd_align = 128;
}
txcmd_size += sizeof(struct iwl_cmd_header);
txcmd_size += 36; /* biggest possible 802.11 header */
/* Ensure device TX cmd cannot reach/cross a page boundary in gen2 */
if (WARN_ON(cfg_trans->gen2 && txcmd_size >= txcmd_align))
return ERR_PTR(-EINVAL);
#ifdef CONFIG_LOCKDEP
lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
&__key, 0);
#endif
trans->dev = dev;
trans->ops = ops;
trans->num_rx_queues = 1;
if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
trans->txqs.bc_tbl_size = sizeof(struct iwl_gen3_bc_tbl);
else
trans->txqs.bc_tbl_size = sizeof(struct iwlagn_scd_bc_tbl);
/*
* For gen2 devices, we use a single allocation for each byte-count
* table, but they're pretty small (1k) so use a DMA pool that we
* allocate here.
*/
if (trans->trans_cfg->gen2) {
trans->txqs.bc_pool = dmam_pool_create("iwlwifi:bc", dev,
trans->txqs.bc_tbl_size,
256, 0);
if (!trans->txqs.bc_pool)
return NULL;
}
if (trans->trans_cfg->use_tfh) {
trans->txqs.tfd.addr_size = 64;
trans->txqs.tfd.max_tbs = IWL_TFH_NUM_TBS;
trans->txqs.tfd.size = sizeof(struct iwl_tfh_tfd);
} else {
trans->txqs.tfd.addr_size = 36;
trans->txqs.tfd.max_tbs = IWL_NUM_OF_TBS;
trans->txqs.tfd.size = sizeof(struct iwl_tfd);
}
trans->max_skb_frags = IWL_TRANS_MAX_FRAGS(trans);
snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
"iwl_cmd_pool:%s", dev_name(trans->dev));
trans->dev_cmd_pool =
kmem_cache_create(trans->dev_cmd_pool_name,
txcmd_size, txcmd_align,
SLAB_HWCACHE_ALIGN, NULL);
if (!trans->dev_cmd_pool)
return NULL;
WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
trans->txqs.tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
if (!trans->txqs.tso_hdr_page) {
kmem_cache_destroy(trans->dev_cmd_pool);
return NULL;
}
return trans;
}
void iwl_trans_free(struct iwl_trans *trans)
{
int i;
for_each_possible_cpu(i) {
struct iwl_tso_hdr_page *p =
per_cpu_ptr(trans->txqs.tso_hdr_page, i);
if (p->page)
__free_page(p->page);
}
free_percpu(trans->txqs.tso_hdr_page);
kmem_cache_destroy(trans->dev_cmd_pool);
}
int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
{
int ret;
if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
test_bit(STATUS_RFKILL_OPMODE, &trans->status)))
return -ERFKILL;
if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
return -EIO;
if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
return -EIO;
}
if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) &&
!(cmd->flags & CMD_ASYNC)))
return -EINVAL;
if (!(cmd->flags & CMD_ASYNC))
lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id))
cmd->id = DEF_ID(cmd->id);
ret = trans->ops->send_cmd(trans, cmd);
if (!(cmd->flags & CMD_ASYNC))
lock_map_release(&trans->sync_cmd_lockdep_map);
if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt))
return -EIO;
return ret;
}
IWL_EXPORT_SYMBOL(iwl_trans_send_cmd);
/* Comparator for struct iwl_hcmd_names.
* Used in the binary search over a list of host commands.
*
* @key: command_id that we're looking for.
* @elt: struct iwl_hcmd_names candidate for match.
*
* @return 0 iff equal.
*/
static int iwl_hcmd_names_cmp(const void *key, const void *elt)
{
const struct iwl_hcmd_names *name = elt;
u8 cmd1 = *(u8 *)key;
u8 cmd2 = name->cmd_id;
return (cmd1 - cmd2);
}
const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id)
{
u8 grp, cmd;
struct iwl_hcmd_names *ret;
const struct iwl_hcmd_arr *arr;
size_t size = sizeof(struct iwl_hcmd_names);
grp = iwl_cmd_groupid(id);
cmd = iwl_cmd_opcode(id);
if (!trans->command_groups || grp >= trans->command_groups_size ||
!trans->command_groups[grp].arr)
return "UNKNOWN";
arr = &trans->command_groups[grp];
ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp);
if (!ret)
return "UNKNOWN";
return ret->cmd_name;
}
IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans)
{
int i, j;
const struct iwl_hcmd_arr *arr;
for (i = 0; i < trans->command_groups_size; i++) {
arr = &trans->command_groups[i];
if (!arr->arr)
continue;
for (j = 0; j < arr->size - 1; j++)
if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id)
return -1;
}
return 0;
}
IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);
|
