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64#include "api/commands.h"
65#include "debugfs.h"
66#include "dbg.h"
67
68#define FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
69struct dbgfs_##name##_data { \
70 argtype *arg; \
71 bool read_done; \
72 ssize_t rlen; \
73 char rbuf[buflen]; \
74}; \
75static int _iwl_dbgfs_##name##_open(struct inode *inode, \
76 struct file *file) \
77{ \
78 struct dbgfs_##name##_data *data; \
79 \
80 data = kzalloc(sizeof(*data), GFP_KERNEL); \
81 if (!data) \
82 return -ENOMEM; \
83 \
84 data->read_done = false; \
85 data->arg = inode->i_private; \
86 file->private_data = data; \
87 \
88 return 0; \
89}
90
91#define FWRT_DEBUGFS_READ_WRAPPER(name) \
92static ssize_t _iwl_dbgfs_##name##_read(struct file *file, \
93 char __user *user_buf, \
94 size_t count, loff_t *ppos) \
95{ \
96 struct dbgfs_##name##_data *data = file->private_data; \
97 \
98 if (!data->read_done) { \
99 data->read_done = true; \
100 data->rlen = iwl_dbgfs_##name##_read(data->arg, \
101 sizeof(data->rbuf),\
102 data->rbuf); \
103 } \
104 \
105 if (data->rlen < 0) \
106 return data->rlen; \
107 return simple_read_from_buffer(user_buf, count, ppos, \
108 data->rbuf, data->rlen); \
109}
110
111static int _iwl_dbgfs_release(struct inode *inode, struct file *file)
112{
113 kfree(file->private_data);
114
115 return 0;
116}
117
118#define _FWRT_DEBUGFS_READ_FILE_OPS(name, buflen, argtype) \
119FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
120FWRT_DEBUGFS_READ_WRAPPER(name) \
121static const struct file_operations iwl_dbgfs_##name##_ops = { \
122 .read = _iwl_dbgfs_##name##_read, \
123 .open = _iwl_dbgfs_##name##_open, \
124 .llseek = generic_file_llseek, \
125 .release = _iwl_dbgfs_release, \
126}
127
128#define FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \
129static ssize_t _iwl_dbgfs_##name##_write(struct file *file, \
130 const char __user *user_buf, \
131 size_t count, loff_t *ppos) \
132{ \
133 argtype *arg = \
134 ((struct dbgfs_##name##_data *)file->private_data)->arg;\
135 char buf[buflen] = {}; \
136 size_t buf_size = min(count, sizeof(buf) - 1); \
137 \
138 if (copy_from_user(buf, user_buf, buf_size)) \
139 return -EFAULT; \
140 \
141 return iwl_dbgfs_##name##_write(arg, buf, buf_size); \
142}
143
144#define _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, buflen, argtype) \
145FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
146FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \
147FWRT_DEBUGFS_READ_WRAPPER(name) \
148static const struct file_operations iwl_dbgfs_##name##_ops = { \
149 .write = _iwl_dbgfs_##name##_write, \
150 .read = _iwl_dbgfs_##name##_read, \
151 .open = _iwl_dbgfs_##name##_open, \
152 .llseek = generic_file_llseek, \
153 .release = _iwl_dbgfs_release, \
154}
155
156#define _FWRT_DEBUGFS_WRITE_FILE_OPS(name, buflen, argtype) \
157FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
158FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \
159static const struct file_operations iwl_dbgfs_##name##_ops = { \
160 .write = _iwl_dbgfs_##name##_write, \
161 .open = _iwl_dbgfs_##name##_open, \
162 .llseek = generic_file_llseek, \
163 .release = _iwl_dbgfs_release, \
164}
165
166#define FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz) \
167 _FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz, struct iwl_fw_runtime)
168
169#define FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
170 _FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime)
171
172#define FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
173 _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime)
174
175#define FWRT_DEBUGFS_ADD_FILE_ALIAS(alias, name, parent, mode) do { \
176 debugfs_create_file(alias, mode, parent, fwrt, \
177 &iwl_dbgfs_##name##_ops); \
178 } while (0)
179#define FWRT_DEBUGFS_ADD_FILE(name, parent, mode) \
180 FWRT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)
181
182static int iwl_fw_send_timestamp_marker_cmd(struct iwl_fw_runtime *fwrt)
183{
184 struct iwl_mvm_marker marker = {
185 .dw_len = sizeof(struct iwl_mvm_marker) / 4,
186 .marker_id = MARKER_ID_SYNC_CLOCK,
187
188
189
190
191 .timestamp = cpu_to_le64(fwrt->timestamp.seq++),
192 };
193
194 struct iwl_host_cmd hcmd = {
195 .id = MARKER_CMD,
196 .flags = CMD_ASYNC,
197 .data[0] = &marker,
198 .len[0] = sizeof(marker),
199 };
200
201 return iwl_trans_send_cmd(fwrt->trans, &hcmd);
202}
203
204static void iwl_fw_timestamp_marker_wk(struct work_struct *work)
205{
206 int ret;
207 struct iwl_fw_runtime *fwrt =
208 container_of(work, struct iwl_fw_runtime, timestamp.wk.work);
209 unsigned long delay = fwrt->timestamp.delay;
210
211 ret = iwl_fw_send_timestamp_marker_cmd(fwrt);
212 if (!ret && delay)
213 schedule_delayed_work(&fwrt->timestamp.wk,
214 round_jiffies_relative(delay));
215 else
216 IWL_INFO(fwrt,
217 "stopping timestamp_marker, ret: %d, delay: %u\n",
218 ret, jiffies_to_msecs(delay) / 1000);
219}
220
221void iwl_fw_trigger_timestamp(struct iwl_fw_runtime *fwrt, u32 delay)
222{
223 IWL_INFO(fwrt,
224 "starting timestamp_marker trigger with delay: %us\n",
225 delay);
226
227 iwl_fw_cancel_timestamp(fwrt);
228
229 fwrt->timestamp.delay = msecs_to_jiffies(delay * 1000);
230
231 schedule_delayed_work(&fwrt->timestamp.wk,
232 round_jiffies_relative(fwrt->timestamp.delay));
233}
234
235static ssize_t iwl_dbgfs_timestamp_marker_write(struct iwl_fw_runtime *fwrt,
236 char *buf, size_t count)
237{
238 int ret;
239 u32 delay;
240
241 ret = kstrtou32(buf, 10, &delay);
242 if (ret < 0)
243 return ret;
244
245 iwl_fw_trigger_timestamp(fwrt, delay);
246
247 return count;
248}
249
250static ssize_t iwl_dbgfs_timestamp_marker_read(struct iwl_fw_runtime *fwrt,
251 size_t size, char *buf)
252{
253 u32 delay_secs = jiffies_to_msecs(fwrt->timestamp.delay) / 1000;
254
255 return scnprintf(buf, size, "%d\n", delay_secs);
256}
257
258FWRT_DEBUGFS_READ_WRITE_FILE_OPS(timestamp_marker, 16);
259
260struct hcmd_write_data {
261 __be32 cmd_id;
262 __be32 flags;
263 __be16 length;
264 u8 data[0];
265} __packed;
266
267static ssize_t iwl_dbgfs_send_hcmd_write(struct iwl_fw_runtime *fwrt, char *buf,
268 size_t count)
269{
270 size_t header_size = (sizeof(u32) * 2 + sizeof(u16)) * 2;
271 size_t data_size = (count - 1) / 2;
272 int ret;
273 struct hcmd_write_data *data;
274 struct iwl_host_cmd hcmd = {
275 .len = { 0, },
276 .data = { NULL, },
277 };
278
279 if (fwrt->ops && fwrt->ops->fw_running &&
280 !fwrt->ops->fw_running(fwrt->ops_ctx))
281 return -EIO;
282
283 if (count < header_size + 1 || count > 1024 * 4)
284 return -EINVAL;
285
286 data = kmalloc(data_size, GFP_KERNEL);
287 if (!data)
288 return -ENOMEM;
289
290 ret = hex2bin((u8 *)data, buf, data_size);
291 if (ret)
292 goto out;
293
294 hcmd.id = be32_to_cpu(data->cmd_id);
295 hcmd.flags = be32_to_cpu(data->flags);
296 hcmd.len[0] = be16_to_cpu(data->length);
297 hcmd.data[0] = data->data;
298
299 if (count != header_size + hcmd.len[0] * 2 + 1) {
300 IWL_ERR(fwrt,
301 "host command data size does not match header length\n");
302 ret = -EINVAL;
303 goto out;
304 }
305
306 if (fwrt->ops && fwrt->ops->send_hcmd)
307 ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd);
308 else
309 ret = -EPERM;
310
311 if (ret < 0)
312 goto out;
313
314 if (hcmd.flags & CMD_WANT_SKB)
315 iwl_free_resp(&hcmd);
316out:
317 kfree(data);
318 return ret ?: count;
319}
320
321FWRT_DEBUGFS_WRITE_FILE_OPS(send_hcmd, 512);
322
323void iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt,
324 struct dentry *dbgfs_dir)
325{
326 INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk);
327 FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, 0200);
328 FWRT_DEBUGFS_ADD_FILE(send_hcmd, dbgfs_dir, 0200);
329}
330
