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d38ceaf9 AD |
1 | /* |
2 | * Copyright 2008 Advanced Micro Devices, Inc. | |
3 | * Copyright 2008 Red Hat Inc. | |
4 | * Copyright 2009 Jerome Glisse. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the "Software"), | |
8 | * to deal in the Software without restriction, including without limitation | |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
10 | * and/or sell copies of the Software, and to permit persons to whom the | |
11 | * Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
22 | * OTHER DEALINGS IN THE SOFTWARE. | |
23 | * | |
24 | * Authors: Dave Airlie | |
25 | * Alex Deucher | |
26 | * Jerome Glisse | |
27 | */ | |
e9c5e740 | 28 | #include <linux/irq.h> |
d38ceaf9 AD |
29 | #include <drm/drmP.h> |
30 | #include <drm/drm_crtc_helper.h> | |
31 | #include <drm/amdgpu_drm.h> | |
32 | #include "amdgpu.h" | |
33 | #include "amdgpu_ih.h" | |
34 | #include "atom.h" | |
35 | #include "amdgpu_connectors.h" | |
36 | ||
37 | #include <linux/pm_runtime.h> | |
38 | ||
39 | #define AMDGPU_WAIT_IDLE_TIMEOUT 200 | |
40 | ||
41 | /* | |
42 | * Handle hotplug events outside the interrupt handler proper. | |
43 | */ | |
44 | /** | |
45 | * amdgpu_hotplug_work_func - display hotplug work handler | |
46 | * | |
47 | * @work: work struct | |
48 | * | |
49 | * This is the hot plug event work handler (all asics). | |
50 | * The work gets scheduled from the irq handler if there | |
51 | * was a hot plug interrupt. It walks the connector table | |
52 | * and calls the hotplug handler for each one, then sends | |
53 | * a drm hotplug event to alert userspace. | |
54 | */ | |
55 | static void amdgpu_hotplug_work_func(struct work_struct *work) | |
56 | { | |
57 | struct amdgpu_device *adev = container_of(work, struct amdgpu_device, | |
58 | hotplug_work); | |
59 | struct drm_device *dev = adev->ddev; | |
60 | struct drm_mode_config *mode_config = &dev->mode_config; | |
61 | struct drm_connector *connector; | |
62 | ||
9e14c65c | 63 | mutex_lock(&mode_config->mutex); |
d38ceaf9 AD |
64 | if (mode_config->num_connector) { |
65 | list_for_each_entry(connector, &mode_config->connector_list, head) | |
66 | amdgpu_connector_hotplug(connector); | |
67 | } | |
9e14c65c | 68 | mutex_unlock(&mode_config->mutex); |
d38ceaf9 AD |
69 | /* Just fire off a uevent and let userspace tell us what to do */ |
70 | drm_helper_hpd_irq_event(dev); | |
71 | } | |
72 | ||
73 | /** | |
74 | * amdgpu_irq_reset_work_func - execute gpu reset | |
75 | * | |
76 | * @work: work struct | |
77 | * | |
78 | * Execute scheduled gpu reset (cayman+). | |
79 | * This function is called when the irq handler | |
80 | * thinks we need a gpu reset. | |
81 | */ | |
82 | static void amdgpu_irq_reset_work_func(struct work_struct *work) | |
83 | { | |
84 | struct amdgpu_device *adev = container_of(work, struct amdgpu_device, | |
85 | reset_work); | |
86 | ||
87 | amdgpu_gpu_reset(adev); | |
88 | } | |
89 | ||
90 | /* Disable *all* interrupts */ | |
91 | static void amdgpu_irq_disable_all(struct amdgpu_device *adev) | |
92 | { | |
93 | unsigned long irqflags; | |
94 | unsigned i, j; | |
95 | int r; | |
96 | ||
97 | spin_lock_irqsave(&adev->irq.lock, irqflags); | |
98 | for (i = 0; i < AMDGPU_MAX_IRQ_SRC_ID; ++i) { | |
99 | struct amdgpu_irq_src *src = adev->irq.sources[i]; | |
100 | ||
101 | if (!src || !src->funcs->set || !src->num_types) | |
102 | continue; | |
103 | ||
104 | for (j = 0; j < src->num_types; ++j) { | |
105 | atomic_set(&src->enabled_types[j], 0); | |
106 | r = src->funcs->set(adev, src, j, | |
107 | AMDGPU_IRQ_STATE_DISABLE); | |
108 | if (r) | |
109 | DRM_ERROR("error disabling interrupt (%d)\n", | |
110 | r); | |
111 | } | |
112 | } | |
113 | spin_unlock_irqrestore(&adev->irq.lock, irqflags); | |
114 | } | |
115 | ||
116 | /** | |
117 | * amdgpu_irq_preinstall - drm irq preinstall callback | |
118 | * | |
119 | * @dev: drm dev pointer | |
120 | * | |
121 | * Gets the hw ready to enable irqs (all asics). | |
122 | * This function disables all interrupt sources on the GPU. | |
123 | */ | |
124 | void amdgpu_irq_preinstall(struct drm_device *dev) | |
125 | { | |
126 | struct amdgpu_device *adev = dev->dev_private; | |
127 | ||
128 | /* Disable *all* interrupts */ | |
129 | amdgpu_irq_disable_all(adev); | |
130 | /* Clear bits */ | |
131 | amdgpu_ih_process(adev); | |
132 | } | |
133 | ||
134 | /** | |
135 | * amdgpu_irq_postinstall - drm irq preinstall callback | |
136 | * | |
137 | * @dev: drm dev pointer | |
138 | * | |
139 | * Handles stuff to be done after enabling irqs (all asics). | |
140 | * Returns 0 on success. | |
141 | */ | |
142 | int amdgpu_irq_postinstall(struct drm_device *dev) | |
143 | { | |
5a6adfa2 | 144 | dev->max_vblank_count = 0x00ffffff; |
d38ceaf9 AD |
145 | return 0; |
146 | } | |
147 | ||
148 | /** | |
149 | * amdgpu_irq_uninstall - drm irq uninstall callback | |
150 | * | |
151 | * @dev: drm dev pointer | |
152 | * | |
153 | * This function disables all interrupt sources on the GPU (all asics). | |
154 | */ | |
155 | void amdgpu_irq_uninstall(struct drm_device *dev) | |
156 | { | |
157 | struct amdgpu_device *adev = dev->dev_private; | |
158 | ||
159 | if (adev == NULL) { | |
160 | return; | |
161 | } | |
162 | amdgpu_irq_disable_all(adev); | |
163 | } | |
164 | ||
165 | /** | |
166 | * amdgpu_irq_handler - irq handler | |
167 | * | |
168 | * @int irq, void *arg: args | |
169 | * | |
170 | * This is the irq handler for the amdgpu driver (all asics). | |
171 | */ | |
172 | irqreturn_t amdgpu_irq_handler(int irq, void *arg) | |
173 | { | |
174 | struct drm_device *dev = (struct drm_device *) arg; | |
175 | struct amdgpu_device *adev = dev->dev_private; | |
176 | irqreturn_t ret; | |
177 | ||
178 | ret = amdgpu_ih_process(adev); | |
179 | if (ret == IRQ_HANDLED) | |
180 | pm_runtime_mark_last_busy(dev->dev); | |
181 | return ret; | |
182 | } | |
183 | ||
184 | /** | |
185 | * amdgpu_msi_ok - asic specific msi checks | |
186 | * | |
187 | * @adev: amdgpu device pointer | |
188 | * | |
189 | * Handles asic specific MSI checks to determine if | |
190 | * MSIs should be enabled on a particular chip (all asics). | |
191 | * Returns true if MSIs should be enabled, false if MSIs | |
192 | * should not be enabled. | |
193 | */ | |
194 | static bool amdgpu_msi_ok(struct amdgpu_device *adev) | |
195 | { | |
196 | /* force MSI on */ | |
197 | if (amdgpu_msi == 1) | |
198 | return true; | |
199 | else if (amdgpu_msi == 0) | |
200 | return false; | |
201 | ||
202 | return true; | |
203 | } | |
204 | ||
205 | /** | |
206 | * amdgpu_irq_init - init driver interrupt info | |
207 | * | |
208 | * @adev: amdgpu device pointer | |
209 | * | |
210 | * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). | |
211 | * Returns 0 for success, error for failure. | |
212 | */ | |
213 | int amdgpu_irq_init(struct amdgpu_device *adev) | |
214 | { | |
215 | int r = 0; | |
216 | ||
217 | spin_lock_init(&adev->irq.lock); | |
218 | r = drm_vblank_init(adev->ddev, adev->mode_info.num_crtc); | |
219 | if (r) { | |
220 | return r; | |
221 | } | |
222 | /* enable msi */ | |
223 | adev->irq.msi_enabled = false; | |
224 | ||
225 | if (amdgpu_msi_ok(adev)) { | |
226 | int ret = pci_enable_msi(adev->pdev); | |
227 | if (!ret) { | |
228 | adev->irq.msi_enabled = true; | |
229 | dev_info(adev->dev, "amdgpu: using MSI.\n"); | |
230 | } | |
231 | } | |
232 | ||
233 | INIT_WORK(&adev->hotplug_work, amdgpu_hotplug_work_func); | |
234 | INIT_WORK(&adev->reset_work, amdgpu_irq_reset_work_func); | |
235 | ||
236 | adev->irq.installed = true; | |
237 | r = drm_irq_install(adev->ddev, adev->ddev->pdev->irq); | |
238 | if (r) { | |
239 | adev->irq.installed = false; | |
240 | flush_work(&adev->hotplug_work); | |
241 | return r; | |
242 | } | |
243 | ||
244 | DRM_INFO("amdgpu: irq initialized.\n"); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | /** | |
249 | * amdgpu_irq_fini - tear down driver interrupt info | |
250 | * | |
251 | * @adev: amdgpu device pointer | |
252 | * | |
253 | * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). | |
254 | */ | |
255 | void amdgpu_irq_fini(struct amdgpu_device *adev) | |
256 | { | |
257 | unsigned i; | |
258 | ||
259 | drm_vblank_cleanup(adev->ddev); | |
260 | if (adev->irq.installed) { | |
261 | drm_irq_uninstall(adev->ddev); | |
262 | adev->irq.installed = false; | |
263 | if (adev->irq.msi_enabled) | |
264 | pci_disable_msi(adev->pdev); | |
265 | flush_work(&adev->hotplug_work); | |
266 | } | |
267 | ||
268 | for (i = 0; i < AMDGPU_MAX_IRQ_SRC_ID; ++i) { | |
269 | struct amdgpu_irq_src *src = adev->irq.sources[i]; | |
270 | ||
271 | if (!src) | |
272 | continue; | |
273 | ||
274 | kfree(src->enabled_types); | |
275 | src->enabled_types = NULL; | |
0cf3be21 AD |
276 | if (src->data) { |
277 | kfree(src->data); | |
278 | kfree(src); | |
279 | adev->irq.sources[i] = NULL; | |
280 | } | |
d38ceaf9 AD |
281 | } |
282 | } | |
283 | ||
284 | /** | |
285 | * amdgpu_irq_add_id - register irq source | |
286 | * | |
287 | * @adev: amdgpu device pointer | |
288 | * @src_id: source id for this source | |
289 | * @source: irq source | |
290 | * | |
291 | */ | |
292 | int amdgpu_irq_add_id(struct amdgpu_device *adev, unsigned src_id, | |
293 | struct amdgpu_irq_src *source) | |
294 | { | |
295 | if (src_id >= AMDGPU_MAX_IRQ_SRC_ID) | |
296 | return -EINVAL; | |
297 | ||
298 | if (adev->irq.sources[src_id] != NULL) | |
299 | return -EINVAL; | |
300 | ||
301 | if (!source->funcs) | |
302 | return -EINVAL; | |
303 | ||
304 | if (source->num_types && !source->enabled_types) { | |
305 | atomic_t *types; | |
306 | ||
307 | types = kcalloc(source->num_types, sizeof(atomic_t), | |
308 | GFP_KERNEL); | |
309 | if (!types) | |
310 | return -ENOMEM; | |
311 | ||
312 | source->enabled_types = types; | |
313 | } | |
314 | ||
315 | adev->irq.sources[src_id] = source; | |
5f232365 | 316 | |
d38ceaf9 AD |
317 | return 0; |
318 | } | |
319 | ||
320 | /** | |
321 | * amdgpu_irq_dispatch - dispatch irq to IP blocks | |
322 | * | |
323 | * @adev: amdgpu device pointer | |
324 | * @entry: interrupt vector | |
325 | * | |
326 | * Dispatches the irq to the different IP blocks | |
327 | */ | |
328 | void amdgpu_irq_dispatch(struct amdgpu_device *adev, | |
329 | struct amdgpu_iv_entry *entry) | |
330 | { | |
331 | unsigned src_id = entry->src_id; | |
332 | struct amdgpu_irq_src *src; | |
333 | int r; | |
334 | ||
335 | if (src_id >= AMDGPU_MAX_IRQ_SRC_ID) { | |
336 | DRM_DEBUG("Invalid src_id in IV: %d\n", src_id); | |
337 | return; | |
338 | } | |
339 | ||
5f232365 AD |
340 | if (adev->irq.virq[src_id]) { |
341 | generic_handle_irq(irq_find_mapping(adev->irq.domain, src_id)); | |
342 | } else { | |
343 | src = adev->irq.sources[src_id]; | |
344 | if (!src) { | |
345 | DRM_DEBUG("Unhandled interrupt src_id: %d\n", src_id); | |
346 | return; | |
347 | } | |
d38ceaf9 | 348 | |
5f232365 AD |
349 | r = src->funcs->process(adev, src, entry); |
350 | if (r) | |
351 | DRM_ERROR("error processing interrupt (%d)\n", r); | |
352 | } | |
d38ceaf9 AD |
353 | } |
354 | ||
355 | /** | |
356 | * amdgpu_irq_update - update hw interrupt state | |
357 | * | |
358 | * @adev: amdgpu device pointer | |
359 | * @src: interrupt src you want to enable | |
360 | * @type: type of interrupt you want to update | |
361 | * | |
362 | * Updates the interrupt state for a specific src (all asics). | |
363 | */ | |
364 | int amdgpu_irq_update(struct amdgpu_device *adev, | |
365 | struct amdgpu_irq_src *src, unsigned type) | |
366 | { | |
367 | unsigned long irqflags; | |
368 | enum amdgpu_interrupt_state state; | |
369 | int r; | |
370 | ||
371 | spin_lock_irqsave(&adev->irq.lock, irqflags); | |
372 | ||
373 | /* we need to determine after taking the lock, otherwise | |
374 | we might disable just enabled interrupts again */ | |
375 | if (amdgpu_irq_enabled(adev, src, type)) | |
376 | state = AMDGPU_IRQ_STATE_ENABLE; | |
377 | else | |
378 | state = AMDGPU_IRQ_STATE_DISABLE; | |
379 | ||
380 | r = src->funcs->set(adev, src, type, state); | |
381 | spin_unlock_irqrestore(&adev->irq.lock, irqflags); | |
382 | return r; | |
383 | } | |
384 | ||
385 | /** | |
386 | * amdgpu_irq_get - enable interrupt | |
387 | * | |
388 | * @adev: amdgpu device pointer | |
389 | * @src: interrupt src you want to enable | |
390 | * @type: type of interrupt you want to enable | |
391 | * | |
392 | * Enables the interrupt type for a specific src (all asics). | |
393 | */ | |
394 | int amdgpu_irq_get(struct amdgpu_device *adev, struct amdgpu_irq_src *src, | |
395 | unsigned type) | |
396 | { | |
397 | if (!adev->ddev->irq_enabled) | |
398 | return -ENOENT; | |
399 | ||
400 | if (type >= src->num_types) | |
401 | return -EINVAL; | |
402 | ||
403 | if (!src->enabled_types || !src->funcs->set) | |
404 | return -EINVAL; | |
405 | ||
406 | if (atomic_inc_return(&src->enabled_types[type]) == 1) | |
407 | return amdgpu_irq_update(adev, src, type); | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | bool amdgpu_irq_get_delayed(struct amdgpu_device *adev, | |
413 | struct amdgpu_irq_src *src, | |
414 | unsigned type) | |
415 | { | |
416 | if ((type >= src->num_types) || !src->enabled_types) | |
417 | return false; | |
418 | return atomic_inc_return(&src->enabled_types[type]) == 1; | |
419 | } | |
420 | ||
421 | /** | |
422 | * amdgpu_irq_put - disable interrupt | |
423 | * | |
424 | * @adev: amdgpu device pointer | |
425 | * @src: interrupt src you want to disable | |
426 | * @type: type of interrupt you want to disable | |
427 | * | |
428 | * Disables the interrupt type for a specific src (all asics). | |
429 | */ | |
430 | int amdgpu_irq_put(struct amdgpu_device *adev, struct amdgpu_irq_src *src, | |
431 | unsigned type) | |
432 | { | |
433 | if (!adev->ddev->irq_enabled) | |
434 | return -ENOENT; | |
435 | ||
436 | if (type >= src->num_types) | |
437 | return -EINVAL; | |
438 | ||
439 | if (!src->enabled_types || !src->funcs->set) | |
440 | return -EINVAL; | |
441 | ||
442 | if (atomic_dec_and_test(&src->enabled_types[type])) | |
443 | return amdgpu_irq_update(adev, src, type); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | /** | |
449 | * amdgpu_irq_enabled - test if irq is enabled or not | |
450 | * | |
451 | * @adev: amdgpu device pointer | |
452 | * @idx: interrupt src you want to test | |
453 | * | |
454 | * Tests if the given interrupt source is enabled or not | |
455 | */ | |
456 | bool amdgpu_irq_enabled(struct amdgpu_device *adev, struct amdgpu_irq_src *src, | |
457 | unsigned type) | |
458 | { | |
459 | if (!adev->ddev->irq_enabled) | |
460 | return false; | |
461 | ||
462 | if (type >= src->num_types) | |
463 | return false; | |
464 | ||
465 | if (!src->enabled_types || !src->funcs->set) | |
466 | return false; | |
467 | ||
468 | return !!atomic_read(&src->enabled_types[type]); | |
469 | } | |
5f232365 AD |
470 | |
471 | /* gen irq */ | |
472 | static void amdgpu_irq_mask(struct irq_data *irqd) | |
473 | { | |
474 | /* XXX */ | |
475 | } | |
476 | ||
477 | static void amdgpu_irq_unmask(struct irq_data *irqd) | |
478 | { | |
479 | /* XXX */ | |
480 | } | |
481 | ||
482 | static struct irq_chip amdgpu_irq_chip = { | |
483 | .name = "amdgpu-ih", | |
484 | .irq_mask = amdgpu_irq_mask, | |
485 | .irq_unmask = amdgpu_irq_unmask, | |
486 | }; | |
487 | ||
488 | static int amdgpu_irqdomain_map(struct irq_domain *d, | |
489 | unsigned int irq, irq_hw_number_t hwirq) | |
490 | { | |
491 | if (hwirq >= AMDGPU_MAX_IRQ_SRC_ID) | |
492 | return -EPERM; | |
493 | ||
494 | irq_set_chip_and_handler(irq, | |
495 | &amdgpu_irq_chip, handle_simple_irq); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | static struct irq_domain_ops amdgpu_hw_irqdomain_ops = { | |
500 | .map = amdgpu_irqdomain_map, | |
501 | }; | |
502 | ||
503 | /** | |
504 | * amdgpu_irq_add_domain - create a linear irq domain | |
505 | * | |
506 | * @adev: amdgpu device pointer | |
507 | * | |
508 | * Create an irq domain for GPU interrupt sources | |
509 | * that may be driven by another driver (e.g., ACP). | |
510 | */ | |
511 | int amdgpu_irq_add_domain(struct amdgpu_device *adev) | |
512 | { | |
513 | adev->irq.domain = irq_domain_add_linear(NULL, AMDGPU_MAX_IRQ_SRC_ID, | |
514 | &amdgpu_hw_irqdomain_ops, adev); | |
515 | if (!adev->irq.domain) { | |
516 | DRM_ERROR("GPU irq add domain failed\n"); | |
517 | return -ENODEV; | |
518 | } | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | /** | |
524 | * amdgpu_irq_remove_domain - remove the irq domain | |
525 | * | |
526 | * @adev: amdgpu device pointer | |
527 | * | |
528 | * Remove the irq domain for GPU interrupt sources | |
529 | * that may be driven by another driver (e.g., ACP). | |
530 | */ | |
531 | void amdgpu_irq_remove_domain(struct amdgpu_device *adev) | |
532 | { | |
533 | if (adev->irq.domain) { | |
534 | irq_domain_remove(adev->irq.domain); | |
535 | adev->irq.domain = NULL; | |
536 | } | |
537 | } | |
538 | ||
539 | /** | |
540 | * amdgpu_irq_create_mapping - create a mapping between a domain irq and a | |
541 | * Linux irq | |
542 | * | |
543 | * @adev: amdgpu device pointer | |
544 | * @src_id: IH source id | |
545 | * | |
546 | * Create a mapping between a domain irq (GPU IH src id) and a Linux irq | |
547 | * Use this for components that generate a GPU interrupt, but are driven | |
548 | * by a different driver (e.g., ACP). | |
549 | * Returns the Linux irq. | |
550 | */ | |
551 | unsigned amdgpu_irq_create_mapping(struct amdgpu_device *adev, unsigned src_id) | |
552 | { | |
553 | adev->irq.virq[src_id] = irq_create_mapping(adev->irq.domain, src_id); | |
554 | ||
555 | return adev->irq.virq[src_id]; | |
556 | } |