drm/xe/xe_devcoredump.c

31  * DOC: Xe device coredump
38  * coredump.
41  * coredump:
50  *   After a coredump is generated, it stays in kernel memory until released by
53  *   a coredump:
73 static struct xe_device *coredump_to_xe(const struct xe_devcoredump *coredump)
75 	return container_of(coredump, struct xe_device, devcoredump);
85 				     struct xe_devcoredump *coredump)
94 	xe = coredump_to_xe(coredump);
95 	ss = &coredump->snapshot;
175  * xe_devcoredump_read() - Read data from the Xe device coredump snapshot
176  * @buffer: Destination buffer to copy the coredump data into
177  * @offset: Offset in the coredump data to start reading from
182  * Reads a chunk of the coredump snapshot data into the provided buffer.
193 	struct xe_devcoredump *coredump = data;
201 	if (!coredump)
204 	ss = &coredump->snapshot;
213 	mutex_lock(&coredump->lock);
234 				      ss->read.chunk_position, coredump);
242 	mutex_unlock(&coredump->lock);
252 	struct xe_devcoredump *coredump = data;
255 	if (!data || !coredump_to_xe(coredump))
258 	cancel_work_sync(&coredump->snapshot.work);
260 	mutex_lock(&coredump->lock);
262 	xe_devcoredump_snapshot_free(&coredump->snapshot);
263 	kvfree(coredump->snapshot.read.buffer);
266 	memset(&coredump->snapshot, 0, sizeof(coredump->snapshot));
267 	coredump->captured = false;
268 	drm_info(&coredump_to_xe(coredump)->drm,
269 		 "Xe device coredump has been deleted.\n");
271 	mutex_unlock(&coredump->lock);
277 	struct xe_devcoredump *coredump = container_of(ss, typeof(*coredump), snapshot);
278 	struct xe_device *xe = coredump_to_xe(coredump);
286 	dev_coredumpm_timeout(gt_to_xe(ss->gt)->drm.dev, THIS_MODULE, coredump, 0, GFP_KERNEL,
295 		xe_gt_info(ss->gt, "failed to get forcewake for coredump capture\n");
303 	ss->read.size = __xe_devcoredump_read(NULL, LONG_MAX, 0, coredump);
313 				      0, coredump);
320 				      coredump);
328 static void devcoredump_snapshot(struct xe_devcoredump *coredump,
332 	struct xe_devcoredump_snapshot *ss = &coredump->snapshot;
372  * xe_devcoredump - Take the required snapshots and initialize coredump device.
385 	struct xe_devcoredump *coredump = &xe->devcoredump;
388 	mutex_lock(&coredump->lock);
390 	if (coredump->captured) {
392 		mutex_unlock(&coredump->lock);
396 	coredump->captured = true;
399 	coredump->snapshot.reason = kvasprintf(GFP_ATOMIC, fmt, varg);
402 	devcoredump_snapshot(coredump, q, job);
404 	drm_info(&xe->drm, "Xe device coredump has been created\n");
408 	mutex_unlock(&coredump->lock);