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63#include <linux/kernel.h>
64#include <linux/bsearch.h>
65
66#include "iwl-trans.h"
67#include "iwl-drv.h"
68#include "iwl-fh.h"
69
70struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
71 struct device *dev,
72 const struct iwl_cfg *cfg,
73 const struct iwl_trans_ops *ops,
74 size_t dev_cmd_headroom)
75{
76 struct iwl_trans *trans;
77#ifdef CONFIG_LOCKDEP
78 static struct lock_class_key __key;
79#endif
80
81 trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL);
82 if (!trans)
83 return NULL;
84
85#ifdef CONFIG_LOCKDEP
86 lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
87 &__key, 0);
88#endif
89
90 trans->dev = dev;
91 trans->cfg = cfg;
92 trans->ops = ops;
93 trans->dev_cmd_headroom = dev_cmd_headroom;
94 trans->num_rx_queues = 1;
95
96 snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
97 "iwl_cmd_pool:%s", dev_name(trans->dev));
98 trans->dev_cmd_pool =
99 kmem_cache_create(trans->dev_cmd_pool_name,
100 sizeof(struct iwl_device_cmd)
101 + trans->dev_cmd_headroom,
102 sizeof(void *),
103 SLAB_HWCACHE_ALIGN,
104 NULL);
105 if (!trans->dev_cmd_pool)
106 return NULL;
107
108 return trans;
109}
110
111void iwl_trans_free(struct iwl_trans *trans)
112{
113 kmem_cache_destroy(trans->dev_cmd_pool);
114}
115
116int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
117{
118 int ret;
119
120 if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
121 test_bit(STATUS_RFKILL, &trans->status)))
122 return -ERFKILL;
123
124 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
125 return -EIO;
126
127 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
128 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
129 return -EIO;
130 }
131
132 if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) &&
133 !(cmd->flags & CMD_ASYNC)))
134 return -EINVAL;
135
136 if (!(cmd->flags & CMD_ASYNC))
137 lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
138
139 if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id))
140 cmd->id = DEF_ID(cmd->id);
141
142 ret = trans->ops->send_cmd(trans, cmd);
143
144 if (!(cmd->flags & CMD_ASYNC))
145 lock_map_release(&trans->sync_cmd_lockdep_map);
146
147 return ret;
148}
149IWL_EXPORT_SYMBOL(iwl_trans_send_cmd);
150
151
152
153
154
155
156
157
158
159static int iwl_hcmd_names_cmp(const void *key, const void *elt)
160{
161 const struct iwl_hcmd_names *name = elt;
162 u8 cmd1 = *(u8 *)key;
163 u8 cmd2 = name->cmd_id;
164
165 return (cmd1 - cmd2);
166}
167
168const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id)
169{
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);
174
175 grp = iwl_cmd_groupid(id);
176 cmd = iwl_cmd_opcode(id);
177
178 if (!trans->command_groups || grp >= trans->command_groups_size ||
179 !trans->command_groups[grp].arr)
180 return "UNKNOWN";
181
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;
187}
188IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
189
190int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans)
191{
192 int i, j;
193 const struct iwl_hcmd_arr *arr;
194
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;
202 }
203 return 0;
204}
205IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);
206