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 */
28 #include <drm/drmP.h>
29 #include <drm/drm_crtc_helper.h>
30 #include <drm/radeon_drm.h>
31 #include "radeon_reg.h"
32 #include "radeon.h"
33 #include "atom.h"
34
35 #define RADEON_WAIT_IDLE_TIMEOUT 200
36
37 /**
38 * radeon_driver_irq_handler_kms - irq handler for KMS
39 *
40 * @DRM_IRQ_ARGS: args
41 *
42 * This is the irq handler for the radeon KMS driver (all asics).
43 * radeon_irq_process is a macro that points to the per-asic
44 * irq handler callback.
45 */
radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)46 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
47 {
48 struct drm_device *dev = (struct drm_device *) arg;
49 struct radeon_device *rdev = dev->dev_private;
50
51 return radeon_irq_process(rdev);
52 }
53
54 /*
55 * Handle hotplug events outside the interrupt handler proper.
56 */
57 /**
58 * radeon_hotplug_work_func - display hotplug work handler
59 *
60 * @work: work struct
61 *
62 * This is the hot plug event work handler (all asics).
63 * The work gets scheduled from the irq handler if there
64 * was a hot plug interrupt. It walks the connector table
65 * and calls the hotplug handler for each one, then sends
66 * a drm hotplug event to alert userspace.
67 */
radeon_hotplug_work_func(struct work_struct * work)68 static void radeon_hotplug_work_func(struct work_struct *work)
69 {
70 struct radeon_device *rdev = container_of(work, struct radeon_device,
71 hotplug_work);
72 struct drm_device *dev = rdev->ddev;
73 struct drm_mode_config *mode_config = &dev->mode_config;
74 struct drm_connector *connector;
75
76 if (mode_config->num_connector) {
77 list_for_each_entry(connector, &mode_config->connector_list, head)
78 radeon_connector_hotplug(connector);
79 }
80 /* Just fire off a uevent and let userspace tell us what to do */
81 drm_helper_hpd_irq_event(dev);
82 }
83
84 /**
85 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
86 *
87 * @dev: drm dev pointer
88 *
89 * Gets the hw ready to enable irqs (all asics).
90 * This function disables all interrupt sources on the GPU.
91 */
radeon_driver_irq_preinstall_kms(struct drm_device * dev)92 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
93 {
94 struct radeon_device *rdev = dev->dev_private;
95 unsigned long irqflags;
96 unsigned i;
97
98 spin_lock_irqsave(&rdev->irq.lock, irqflags);
99 /* Disable *all* interrupts */
100 for (i = 0; i < RADEON_NUM_RINGS; i++)
101 atomic_set(&rdev->irq.ring_int[i], 0);
102 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
103 rdev->irq.hpd[i] = false;
104 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
105 rdev->irq.crtc_vblank_int[i] = false;
106 atomic_set(&rdev->irq.pflip[i], 0);
107 rdev->irq.afmt[i] = false;
108 }
109 radeon_irq_set(rdev);
110 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
111 /* Clear bits */
112 radeon_irq_process(rdev);
113 }
114
115 /**
116 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
117 *
118 * @dev: drm dev pointer
119 *
120 * Handles stuff to be done after enabling irqs (all asics).
121 * Returns 0 on success.
122 */
radeon_driver_irq_postinstall_kms(struct drm_device * dev)123 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
124 {
125 dev->max_vblank_count = 0x001fffff;
126 return 0;
127 }
128
129 /**
130 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
131 *
132 * @dev: drm dev pointer
133 *
134 * This function disables all interrupt sources on the GPU (all asics).
135 */
radeon_driver_irq_uninstall_kms(struct drm_device * dev)136 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
137 {
138 struct radeon_device *rdev = dev->dev_private;
139 unsigned long irqflags;
140 unsigned i;
141
142 if (rdev == NULL) {
143 return;
144 }
145 spin_lock_irqsave(&rdev->irq.lock, irqflags);
146 /* Disable *all* interrupts */
147 for (i = 0; i < RADEON_NUM_RINGS; i++)
148 atomic_set(&rdev->irq.ring_int[i], 0);
149 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
150 rdev->irq.hpd[i] = false;
151 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
152 rdev->irq.crtc_vblank_int[i] = false;
153 atomic_set(&rdev->irq.pflip[i], 0);
154 rdev->irq.afmt[i] = false;
155 }
156 radeon_irq_set(rdev);
157 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
158 }
159
160 /**
161 * radeon_msi_ok - asic specific msi checks
162 *
163 * @rdev: radeon device pointer
164 *
165 * Handles asic specific MSI checks to determine if
166 * MSIs should be enabled on a particular chip (all asics).
167 * Returns true if MSIs should be enabled, false if MSIs
168 * should not be enabled.
169 */
radeon_msi_ok(struct radeon_device * rdev)170 static bool radeon_msi_ok(struct radeon_device *rdev)
171 {
172 /* RV370/RV380 was first asic with MSI support */
173 if (rdev->family < CHIP_RV380)
174 return false;
175
176 /* MSIs don't work on AGP */
177 if (rdev->flags & RADEON_IS_AGP)
178 return false;
179
180 /* force MSI on */
181 if (radeon_msi == 1)
182 return true;
183 else if (radeon_msi == 0)
184 return false;
185
186 /* Quirks */
187 /* HP RS690 only seems to work with MSIs. */
188 if ((rdev->pdev->device == 0x791f) &&
189 (rdev->pdev->subsystem_vendor == 0x103c) &&
190 (rdev->pdev->subsystem_device == 0x30c2))
191 return true;
192
193 /* Dell RS690 only seems to work with MSIs. */
194 if ((rdev->pdev->device == 0x791f) &&
195 (rdev->pdev->subsystem_vendor == 0x1028) &&
196 (rdev->pdev->subsystem_device == 0x01fc))
197 return true;
198
199 /* Dell RS690 only seems to work with MSIs. */
200 if ((rdev->pdev->device == 0x791f) &&
201 (rdev->pdev->subsystem_vendor == 0x1028) &&
202 (rdev->pdev->subsystem_device == 0x01fd))
203 return true;
204
205 /* Gateway RS690 only seems to work with MSIs. */
206 if ((rdev->pdev->device == 0x791f) &&
207 (rdev->pdev->subsystem_vendor == 0x107b) &&
208 (rdev->pdev->subsystem_device == 0x0185))
209 return true;
210
211 /* try and enable MSIs by default on all RS690s */
212 if (rdev->family == CHIP_RS690)
213 return true;
214
215 /* RV515 seems to have MSI issues where it loses
216 * MSI rearms occasionally. This leads to lockups and freezes.
217 * disable it by default.
218 */
219 if (rdev->family == CHIP_RV515)
220 return false;
221 if (rdev->flags & RADEON_IS_IGP) {
222 /* APUs work fine with MSIs */
223 if (rdev->family >= CHIP_PALM)
224 return true;
225 /* lots of IGPs have problems with MSIs */
226 return false;
227 }
228
229 return true;
230 }
231
232 /**
233 * radeon_irq_kms_init - init driver interrupt info
234 *
235 * @rdev: radeon device pointer
236 *
237 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
238 * Returns 0 for success, error for failure.
239 */
radeon_irq_kms_init(struct radeon_device * rdev)240 int radeon_irq_kms_init(struct radeon_device *rdev)
241 {
242 int r = 0;
243
244 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
245 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
246
247 spin_lock_init(&rdev->irq.lock);
248 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
249 if (r) {
250 return r;
251 }
252 /* enable msi */
253 rdev->msi_enabled = 0;
254
255 if (radeon_msi_ok(rdev)) {
256 int ret = pci_enable_msi(rdev->pdev);
257 if (!ret) {
258 rdev->msi_enabled = 1;
259 dev_info(rdev->dev, "radeon: using MSI.\n");
260 }
261 }
262 rdev->irq.installed = true;
263 r = drm_irq_install(rdev->ddev);
264 if (r) {
265 rdev->irq.installed = false;
266 return r;
267 }
268 DRM_INFO("radeon: irq initialized.\n");
269 return 0;
270 }
271
272 /**
273 * radeon_irq_kms_fini - tear down driver interrupt info
274 *
275 * @rdev: radeon device pointer
276 *
277 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
278 */
radeon_irq_kms_fini(struct radeon_device * rdev)279 void radeon_irq_kms_fini(struct radeon_device *rdev)
280 {
281 drm_vblank_cleanup(rdev->ddev);
282 if (rdev->irq.installed) {
283 drm_irq_uninstall(rdev->ddev);
284 rdev->irq.installed = false;
285 if (rdev->msi_enabled)
286 pci_disable_msi(rdev->pdev);
287 }
288 flush_work(&rdev->hotplug_work);
289 }
290
291 /**
292 * radeon_irq_kms_sw_irq_get - enable software interrupt
293 *
294 * @rdev: radeon device pointer
295 * @ring: ring whose interrupt you want to enable
296 *
297 * Enables the software interrupt for a specific ring (all asics).
298 * The software interrupt is generally used to signal a fence on
299 * a particular ring.
300 */
radeon_irq_kms_sw_irq_get(struct radeon_device * rdev,int ring)301 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
302 {
303 unsigned long irqflags;
304
305 if (!rdev->ddev->irq_enabled)
306 return;
307
308 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
309 spin_lock_irqsave(&rdev->irq.lock, irqflags);
310 radeon_irq_set(rdev);
311 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
312 }
313 }
314
315 /**
316 * radeon_irq_kms_sw_irq_put - disable software interrupt
317 *
318 * @rdev: radeon device pointer
319 * @ring: ring whose interrupt you want to disable
320 *
321 * Disables the software interrupt for a specific ring (all asics).
322 * The software interrupt is generally used to signal a fence on
323 * a particular ring.
324 */
radeon_irq_kms_sw_irq_put(struct radeon_device * rdev,int ring)325 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
326 {
327 unsigned long irqflags;
328
329 if (!rdev->ddev->irq_enabled)
330 return;
331
332 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
333 spin_lock_irqsave(&rdev->irq.lock, irqflags);
334 radeon_irq_set(rdev);
335 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
336 }
337 }
338
339 /**
340 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
341 *
342 * @rdev: radeon device pointer
343 * @crtc: crtc whose interrupt you want to enable
344 *
345 * Enables the pageflip interrupt for a specific crtc (all asics).
346 * For pageflips we use the vblank interrupt source.
347 */
radeon_irq_kms_pflip_irq_get(struct radeon_device * rdev,int crtc)348 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
349 {
350 unsigned long irqflags;
351
352 if (crtc < 0 || crtc >= rdev->num_crtc)
353 return;
354
355 if (!rdev->ddev->irq_enabled)
356 return;
357
358 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
359 spin_lock_irqsave(&rdev->irq.lock, irqflags);
360 radeon_irq_set(rdev);
361 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
362 }
363 }
364
365 /**
366 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
367 *
368 * @rdev: radeon device pointer
369 * @crtc: crtc whose interrupt you want to disable
370 *
371 * Disables the pageflip interrupt for a specific crtc (all asics).
372 * For pageflips we use the vblank interrupt source.
373 */
radeon_irq_kms_pflip_irq_put(struct radeon_device * rdev,int crtc)374 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
375 {
376 unsigned long irqflags;
377
378 if (crtc < 0 || crtc >= rdev->num_crtc)
379 return;
380
381 if (!rdev->ddev->irq_enabled)
382 return;
383
384 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
385 spin_lock_irqsave(&rdev->irq.lock, irqflags);
386 radeon_irq_set(rdev);
387 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
388 }
389 }
390
391 /**
392 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
393 *
394 * @rdev: radeon device pointer
395 * @block: afmt block whose interrupt you want to enable
396 *
397 * Enables the afmt change interrupt for a specific afmt block (all asics).
398 */
radeon_irq_kms_enable_afmt(struct radeon_device * rdev,int block)399 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
400 {
401 unsigned long irqflags;
402
403 if (!rdev->ddev->irq_enabled)
404 return;
405
406 spin_lock_irqsave(&rdev->irq.lock, irqflags);
407 rdev->irq.afmt[block] = true;
408 radeon_irq_set(rdev);
409 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
410
411 }
412
413 /**
414 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
415 *
416 * @rdev: radeon device pointer
417 * @block: afmt block whose interrupt you want to disable
418 *
419 * Disables the afmt change interrupt for a specific afmt block (all asics).
420 */
radeon_irq_kms_disable_afmt(struct radeon_device * rdev,int block)421 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
422 {
423 unsigned long irqflags;
424
425 if (!rdev->ddev->irq_enabled)
426 return;
427
428 spin_lock_irqsave(&rdev->irq.lock, irqflags);
429 rdev->irq.afmt[block] = false;
430 radeon_irq_set(rdev);
431 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
432 }
433
434 /**
435 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
436 *
437 * @rdev: radeon device pointer
438 * @hpd_mask: mask of hpd pins you want to enable.
439 *
440 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
441 */
radeon_irq_kms_enable_hpd(struct radeon_device * rdev,unsigned hpd_mask)442 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
443 {
444 unsigned long irqflags;
445 int i;
446
447 if (!rdev->ddev->irq_enabled)
448 return;
449
450 spin_lock_irqsave(&rdev->irq.lock, irqflags);
451 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
452 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
453 radeon_irq_set(rdev);
454 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
455 }
456
457 /**
458 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
459 *
460 * @rdev: radeon device pointer
461 * @hpd_mask: mask of hpd pins you want to disable.
462 *
463 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
464 */
radeon_irq_kms_disable_hpd(struct radeon_device * rdev,unsigned hpd_mask)465 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
466 {
467 unsigned long irqflags;
468 int i;
469
470 if (!rdev->ddev->irq_enabled)
471 return;
472
473 spin_lock_irqsave(&rdev->irq.lock, irqflags);
474 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
475 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
476 radeon_irq_set(rdev);
477 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
478 }
479
480