2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Dave Airlie
29 #include <drm/drm_crtc_helper.h>
30 #include <drm/radeon_drm.h>
31 #include "radeon_reg.h"
35 #include <linux/pm_runtime.h>
37 #define RADEON_WAIT_IDLE_TIMEOUT 200
40 * radeon_driver_irq_handler_kms - irq handler for KMS
42 * @int irq, void *arg: args
44 * This is the irq handler for the radeon KMS driver (all asics).
45 * radeon_irq_process is a macro that points to the per-asic
46 * irq handler callback.
48 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
50 struct drm_device *dev = (struct drm_device *) arg;
51 struct radeon_device *rdev = dev->dev_private;
54 ret = radeon_irq_process(rdev);
55 if (ret == IRQ_HANDLED)
56 pm_runtime_mark_last_busy(dev->dev);
61 * Handle hotplug events outside the interrupt handler proper.
64 * radeon_hotplug_work_func - display hotplug work handler
68 * This is the hot plug event work handler (all asics).
69 * The work gets scheduled from the irq handler if there
70 * was a hot plug interrupt. It walks the connector table
71 * and calls the hotplug handler for each one, then sends
72 * a drm hotplug event to alert userspace.
74 static void radeon_hotplug_work_func(struct work_struct *work)
76 struct radeon_device *rdev = container_of(work, struct radeon_device,
78 struct drm_device *dev = rdev->ddev;
79 struct drm_mode_config *mode_config = &dev->mode_config;
80 struct drm_connector *connector;
82 if (mode_config->num_connector) {
83 list_for_each_entry(connector, &mode_config->connector_list, head)
84 radeon_connector_hotplug(connector);
86 /* Just fire off a uevent and let userspace tell us what to do */
87 drm_helper_hpd_irq_event(dev);
90 static void radeon_dp_work_func(struct work_struct *work)
92 struct radeon_device *rdev = container_of(work, struct radeon_device,
94 struct drm_device *dev = rdev->ddev;
95 struct drm_mode_config *mode_config = &dev->mode_config;
96 struct drm_connector *connector;
98 /* this should take a mutex */
99 if (mode_config->num_connector) {
100 list_for_each_entry(connector, &mode_config->connector_list, head)
101 radeon_connector_hotplug(connector);
105 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
107 * @dev: drm dev pointer
109 * Gets the hw ready to enable irqs (all asics).
110 * This function disables all interrupt sources on the GPU.
112 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
114 struct radeon_device *rdev = dev->dev_private;
115 unsigned long irqflags;
118 spin_lock_irqsave(&rdev->irq.lock, irqflags);
119 /* Disable *all* interrupts */
120 for (i = 0; i < RADEON_NUM_RINGS; i++)
121 atomic_set(&rdev->irq.ring_int[i], 0);
122 rdev->irq.dpm_thermal = false;
123 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
124 rdev->irq.hpd[i] = false;
125 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
126 rdev->irq.crtc_vblank_int[i] = false;
127 atomic_set(&rdev->irq.pflip[i], 0);
128 rdev->irq.afmt[i] = false;
130 radeon_irq_set(rdev);
131 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
133 radeon_irq_process(rdev);
137 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
139 * @dev: drm dev pointer
141 * Handles stuff to be done after enabling irqs (all asics).
142 * Returns 0 on success.
144 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
146 dev->max_vblank_count = 0x001fffff;
151 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
153 * @dev: drm dev pointer
155 * This function disables all interrupt sources on the GPU (all asics).
157 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
159 struct radeon_device *rdev = dev->dev_private;
160 unsigned long irqflags;
166 spin_lock_irqsave(&rdev->irq.lock, irqflags);
167 /* Disable *all* interrupts */
168 for (i = 0; i < RADEON_NUM_RINGS; i++)
169 atomic_set(&rdev->irq.ring_int[i], 0);
170 rdev->irq.dpm_thermal = false;
171 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
172 rdev->irq.hpd[i] = false;
173 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
174 rdev->irq.crtc_vblank_int[i] = false;
175 atomic_set(&rdev->irq.pflip[i], 0);
176 rdev->irq.afmt[i] = false;
178 radeon_irq_set(rdev);
179 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
183 * radeon_msi_ok - asic specific msi checks
185 * @rdev: radeon device pointer
187 * Handles asic specific MSI checks to determine if
188 * MSIs should be enabled on a particular chip (all asics).
189 * Returns true if MSIs should be enabled, false if MSIs
190 * should not be enabled.
192 static bool radeon_msi_ok(struct radeon_device *rdev)
194 /* RV370/RV380 was first asic with MSI support */
195 if (rdev->family < CHIP_RV380)
198 /* MSIs don't work on AGP */
199 if (rdev->flags & RADEON_IS_AGP)
203 * Older chips have a HW limitation, they can only generate 40 bits
204 * of address for "64-bit" MSIs which breaks on some platforms, notably
205 * IBM POWER servers, so we limit them
207 if (rdev->family < CHIP_BONAIRE) {
208 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
209 rdev->pdev->no_64bit_msi = 1;
215 else if (radeon_msi == 0)
219 /* HP RS690 only seems to work with MSIs. */
220 if ((rdev->pdev->device == 0x791f) &&
221 (rdev->pdev->subsystem_vendor == 0x103c) &&
222 (rdev->pdev->subsystem_device == 0x30c2))
225 /* Dell RS690 only seems to work with MSIs. */
226 if ((rdev->pdev->device == 0x791f) &&
227 (rdev->pdev->subsystem_vendor == 0x1028) &&
228 (rdev->pdev->subsystem_device == 0x01fc))
231 /* Dell RS690 only seems to work with MSIs. */
232 if ((rdev->pdev->device == 0x791f) &&
233 (rdev->pdev->subsystem_vendor == 0x1028) &&
234 (rdev->pdev->subsystem_device == 0x01fd))
237 /* Gateway RS690 only seems to work with MSIs. */
238 if ((rdev->pdev->device == 0x791f) &&
239 (rdev->pdev->subsystem_vendor == 0x107b) &&
240 (rdev->pdev->subsystem_device == 0x0185))
243 /* try and enable MSIs by default on all RS690s */
244 if (rdev->family == CHIP_RS690)
247 /* RV515 seems to have MSI issues where it loses
248 * MSI rearms occasionally. This leads to lockups and freezes.
249 * disable it by default.
251 if (rdev->family == CHIP_RV515)
253 if (rdev->flags & RADEON_IS_IGP) {
254 /* APUs work fine with MSIs */
255 if (rdev->family >= CHIP_PALM)
257 /* lots of IGPs have problems with MSIs */
265 * radeon_irq_kms_init - init driver interrupt info
267 * @rdev: radeon device pointer
269 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
270 * Returns 0 for success, error for failure.
272 int radeon_irq_kms_init(struct radeon_device *rdev)
276 spin_lock_init(&rdev->irq.lock);
277 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
282 rdev->msi_enabled = 0;
284 if (radeon_msi_ok(rdev)) {
285 int ret = pci_enable_msi(rdev->pdev);
287 rdev->msi_enabled = 1;
288 dev_info(rdev->dev, "radeon: using MSI.\n");
292 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
293 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
294 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
296 rdev->irq.installed = true;
297 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
299 rdev->irq.installed = false;
300 flush_work(&rdev->hotplug_work);
304 DRM_INFO("radeon: irq initialized.\n");
309 * radeon_irq_kms_fini - tear down driver interrupt info
311 * @rdev: radeon device pointer
313 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
315 void radeon_irq_kms_fini(struct radeon_device *rdev)
317 drm_vblank_cleanup(rdev->ddev);
318 if (rdev->irq.installed) {
319 drm_irq_uninstall(rdev->ddev);
320 rdev->irq.installed = false;
321 if (rdev->msi_enabled)
322 pci_disable_msi(rdev->pdev);
323 flush_work(&rdev->hotplug_work);
328 * radeon_irq_kms_sw_irq_get - enable software interrupt
330 * @rdev: radeon device pointer
331 * @ring: ring whose interrupt you want to enable
333 * Enables the software interrupt for a specific ring (all asics).
334 * The software interrupt is generally used to signal a fence on
337 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
339 unsigned long irqflags;
341 if (!rdev->ddev->irq_enabled)
344 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
345 spin_lock_irqsave(&rdev->irq.lock, irqflags);
346 radeon_irq_set(rdev);
347 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
352 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
354 * @rdev: radeon device pointer
355 * @ring: ring whose interrupt you want to enable
357 * Enables the software interrupt for a specific ring (all asics).
358 * The software interrupt is generally used to signal a fence on
361 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
363 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
367 * radeon_irq_kms_sw_irq_put - disable software interrupt
369 * @rdev: radeon device pointer
370 * @ring: ring whose interrupt you want to disable
372 * Disables the software interrupt for a specific ring (all asics).
373 * The software interrupt is generally used to signal a fence on
376 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
378 unsigned long irqflags;
380 if (!rdev->ddev->irq_enabled)
383 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
384 spin_lock_irqsave(&rdev->irq.lock, irqflags);
385 radeon_irq_set(rdev);
386 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
391 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
393 * @rdev: radeon device pointer
394 * @crtc: crtc whose interrupt you want to enable
396 * Enables the pageflip interrupt for a specific crtc (all asics).
397 * For pageflips we use the vblank interrupt source.
399 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
401 unsigned long irqflags;
403 if (crtc < 0 || crtc >= rdev->num_crtc)
406 if (!rdev->ddev->irq_enabled)
409 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
410 spin_lock_irqsave(&rdev->irq.lock, irqflags);
411 radeon_irq_set(rdev);
412 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
417 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
419 * @rdev: radeon device pointer
420 * @crtc: crtc whose interrupt you want to disable
422 * Disables the pageflip interrupt for a specific crtc (all asics).
423 * For pageflips we use the vblank interrupt source.
425 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
427 unsigned long irqflags;
429 if (crtc < 0 || crtc >= rdev->num_crtc)
432 if (!rdev->ddev->irq_enabled)
435 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
436 spin_lock_irqsave(&rdev->irq.lock, irqflags);
437 radeon_irq_set(rdev);
438 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
443 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
445 * @rdev: radeon device pointer
446 * @block: afmt block whose interrupt you want to enable
448 * Enables the afmt change interrupt for a specific afmt block (all asics).
450 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
452 unsigned long irqflags;
454 if (!rdev->ddev->irq_enabled)
457 spin_lock_irqsave(&rdev->irq.lock, irqflags);
458 rdev->irq.afmt[block] = true;
459 radeon_irq_set(rdev);
460 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
465 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
467 * @rdev: radeon device pointer
468 * @block: afmt block whose interrupt you want to disable
470 * Disables the afmt change interrupt for a specific afmt block (all asics).
472 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
474 unsigned long irqflags;
476 if (!rdev->ddev->irq_enabled)
479 spin_lock_irqsave(&rdev->irq.lock, irqflags);
480 rdev->irq.afmt[block] = false;
481 radeon_irq_set(rdev);
482 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
486 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
488 * @rdev: radeon device pointer
489 * @hpd_mask: mask of hpd pins you want to enable.
491 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
493 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
495 unsigned long irqflags;
498 if (!rdev->ddev->irq_enabled)
501 spin_lock_irqsave(&rdev->irq.lock, irqflags);
502 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
503 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
504 radeon_irq_set(rdev);
505 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
509 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
511 * @rdev: radeon device pointer
512 * @hpd_mask: mask of hpd pins you want to disable.
514 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
516 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
518 unsigned long irqflags;
521 if (!rdev->ddev->irq_enabled)
524 spin_lock_irqsave(&rdev->irq.lock, irqflags);
525 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
526 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
527 radeon_irq_set(rdev);
528 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);