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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 if (!debugfs_create_file(alias, mode, parent, fwrt, \
177 &iwl_dbgfs_##name##_ops)) \
178 goto err; \
179 } while (0)
180#define FWRT_DEBUGFS_ADD_FILE(name, parent, mode) \
181 FWRT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)
182
183static int iwl_fw_send_timestamp_marker_cmd(struct iwl_fw_runtime *fwrt)
184{
185 struct iwl_mvm_marker marker = {
186 .dw_len = sizeof(struct iwl_mvm_marker) / 4,
187 .marker_id = MARKER_ID_SYNC_CLOCK,
188
189
190
191
192 .timestamp = cpu_to_le64(fwrt->timestamp.seq++),
193 };
194
195 struct iwl_host_cmd hcmd = {
196 .id = MARKER_CMD,
197 .flags = CMD_ASYNC,
198 .data[0] = &marker,
199 .len[0] = sizeof(marker),
200 };
201
202 return iwl_trans_send_cmd(fwrt->trans, &hcmd);
203}
204
205static void iwl_fw_timestamp_marker_wk(struct work_struct *work)
206{
207 int ret;
208 struct iwl_fw_runtime *fwrt =
209 container_of(work, struct iwl_fw_runtime, timestamp.wk.work);
210 unsigned long delay = fwrt->timestamp.delay;
211
212 ret = iwl_fw_send_timestamp_marker_cmd(fwrt);
213 if (!ret && delay)
214 schedule_delayed_work(&fwrt->timestamp.wk,
215 round_jiffies_relative(delay));
216 else
217 IWL_INFO(fwrt,
218 "stopping timestamp_marker, ret: %d, delay: %u\n",
219 ret, jiffies_to_msecs(delay) / 1000);
220}
221
222void iwl_fw_trigger_timestamp(struct iwl_fw_runtime *fwrt, u32 delay)
223{
224 IWL_INFO(fwrt,
225 "starting timestamp_marker trigger with delay: %us\n",
226 delay);
227
228 iwl_fw_cancel_timestamp(fwrt);
229
230 fwrt->timestamp.delay = msecs_to_jiffies(delay * 1000);
231
232 schedule_delayed_work(&fwrt->timestamp.wk,
233 round_jiffies_relative(fwrt->timestamp.delay));
234}
235
236static ssize_t iwl_dbgfs_timestamp_marker_write(struct iwl_fw_runtime *fwrt,
237 char *buf, size_t count)
238{
239 int ret;
240 u32 delay;
241
242 ret = kstrtou32(buf, 10, &delay);
243 if (ret < 0)
244 return ret;
245
246 iwl_fw_trigger_timestamp(fwrt, delay);
247
248 return count;
249}
250
251static ssize_t iwl_dbgfs_timestamp_marker_read(struct iwl_fw_runtime *fwrt,
252 size_t size, char *buf)
253{
254 u32 delay_secs = jiffies_to_msecs(fwrt->timestamp.delay) / 1000;
255
256 return scnprintf(buf, size, "%d\n", delay_secs);
257}
258
259FWRT_DEBUGFS_READ_WRITE_FILE_OPS(timestamp_marker, 16);
260
261struct hcmd_write_data {
262 __be32 cmd_id;
263 __be32 flags;
264 __be16 length;
265 u8 data[0];
266} __packed;
267
268static ssize_t iwl_dbgfs_send_hcmd_write(struct iwl_fw_runtime *fwrt, char *buf,
269 size_t count)
270{
271 size_t header_size = (sizeof(u32) * 2 + sizeof(u16)) * 2;
272 size_t data_size = (count - 1) / 2;
273 int ret;
274 struct hcmd_write_data *data;
275 struct iwl_host_cmd hcmd = {
276 .len = { 0, },
277 .data = { NULL, },
278 };
279
280 if (fwrt->ops && fwrt->ops->fw_running &&
281 !fwrt->ops->fw_running(fwrt->ops_ctx))
282 return -EIO;
283
284 if (count < header_size + 1 || count > 1024 * 4)
285 return -EINVAL;
286
287 data = kmalloc(data_size, GFP_KERNEL);
288 if (!data)
289 return -ENOMEM;
290
291 ret = hex2bin((u8 *)data, buf, data_size);
292 if (ret)
293 goto out;
294
295 hcmd.id = be32_to_cpu(data->cmd_id);
296 hcmd.flags = be32_to_cpu(data->flags);
297 hcmd.len[0] = be16_to_cpu(data->length);
298 hcmd.data[0] = data->data;
299
300 if (count != header_size + hcmd.len[0] * 2 + 1) {
301 IWL_ERR(fwrt,
302 "host command data size does not match header length\n");
303 ret = -EINVAL;
304 goto out;
305 }
306
307 if (fwrt->ops && fwrt->ops->send_hcmd)
308 ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd);
309 else
310 ret = -EPERM;
311
312 if (ret < 0)
313 goto out;
314
315 if (hcmd.flags & CMD_WANT_SKB)
316 iwl_free_resp(&hcmd);
317out:
318 kfree(data);
319 return ret ?: count;
320}
321
322FWRT_DEBUGFS_WRITE_FILE_OPS(send_hcmd, 512);
323
324int iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt,
325 struct dentry *dbgfs_dir)
326{
327 INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk);
328 FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, 0200);
329 FWRT_DEBUGFS_ADD_FILE(send_hcmd, dbgfs_dir, 0200);
330 return 0;
331err:
332 IWL_ERR(fwrt, "Can't create the fwrt debugfs directory\n");
333 return -ENOMEM;
334}
335
