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);
91 * radeon_irq_reset_work_func - execute gpu reset
95 * Execute scheduled gpu reset (cayman+).
96 * This function is called when the irq handler
97 * thinks we need a gpu reset.
99 static void radeon_irq_reset_work_func(struct work_struct *work)
101 struct radeon_device *rdev = container_of(work, struct radeon_device,
104 radeon_gpu_reset(rdev);
108 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
110 * @dev: drm dev pointer
112 * Gets the hw ready to enable irqs (all asics).
113 * This function disables all interrupt sources on the GPU.
115 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
117 struct radeon_device *rdev = dev->dev_private;
118 unsigned long irqflags;
121 spin_lock_irqsave(&rdev->irq.lock, irqflags);
122 /* Disable *all* interrupts */
123 for (i = 0; i < RADEON_NUM_RINGS; i++)
124 atomic_set(&rdev->irq.ring_int[i], 0);
125 rdev->irq.dpm_thermal = false;
126 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
127 rdev->irq.hpd[i] = false;
128 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
129 rdev->irq.crtc_vblank_int[i] = false;
130 atomic_set(&rdev->irq.pflip[i], 0);
131 rdev->irq.afmt[i] = false;
133 radeon_irq_set(rdev);
134 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
136 radeon_irq_process(rdev);
140 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
142 * @dev: drm dev pointer
144 * Handles stuff to be done after enabling irqs (all asics).
145 * Returns 0 on success.
147 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
149 dev->max_vblank_count = 0x001fffff;
154 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
156 * @dev: drm dev pointer
158 * This function disables all interrupt sources on the GPU (all asics).
160 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
162 struct radeon_device *rdev = dev->dev_private;
163 unsigned long irqflags;
169 spin_lock_irqsave(&rdev->irq.lock, irqflags);
170 /* Disable *all* interrupts */
171 for (i = 0; i < RADEON_NUM_RINGS; i++)
172 atomic_set(&rdev->irq.ring_int[i], 0);
173 rdev->irq.dpm_thermal = false;
174 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
175 rdev->irq.hpd[i] = false;
176 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
177 rdev->irq.crtc_vblank_int[i] = false;
178 atomic_set(&rdev->irq.pflip[i], 0);
179 rdev->irq.afmt[i] = false;
181 radeon_irq_set(rdev);
182 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
186 * radeon_msi_ok - asic specific msi checks
188 * @rdev: radeon device pointer
190 * Handles asic specific MSI checks to determine if
191 * MSIs should be enabled on a particular chip (all asics).
192 * Returns true if MSIs should be enabled, false if MSIs
193 * should not be enabled.
195 static bool radeon_msi_ok(struct radeon_device *rdev)
197 /* RV370/RV380 was first asic with MSI support */
198 if (rdev->family < CHIP_RV380)
201 /* MSIs don't work on AGP */
202 if (rdev->flags & RADEON_IS_AGP)
206 * Older chips have a HW limitation, they can only generate 40 bits
207 * of address for "64-bit" MSIs which breaks on some platforms, notably
208 * IBM POWER servers, so we limit them
210 if (rdev->family < CHIP_BONAIRE) {
211 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
212 rdev->pdev->no_64bit_msi = 1;
218 else if (radeon_msi == 0)
222 /* HP RS690 only seems to work with MSIs. */
223 if ((rdev->pdev->device == 0x791f) &&
224 (rdev->pdev->subsystem_vendor == 0x103c) &&
225 (rdev->pdev->subsystem_device == 0x30c2))
228 /* Dell RS690 only seems to work with MSIs. */
229 if ((rdev->pdev->device == 0x791f) &&
230 (rdev->pdev->subsystem_vendor == 0x1028) &&
231 (rdev->pdev->subsystem_device == 0x01fc))
234 /* Dell RS690 only seems to work with MSIs. */
235 if ((rdev->pdev->device == 0x791f) &&
236 (rdev->pdev->subsystem_vendor == 0x1028) &&
237 (rdev->pdev->subsystem_device == 0x01fd))
240 /* Gateway RS690 only seems to work with MSIs. */
241 if ((rdev->pdev->device == 0x791f) &&
242 (rdev->pdev->subsystem_vendor == 0x107b) &&
243 (rdev->pdev->subsystem_device == 0x0185))
246 /* try and enable MSIs by default on all RS690s */
247 if (rdev->family == CHIP_RS690)
250 /* RV515 seems to have MSI issues where it loses
251 * MSI rearms occasionally. This leads to lockups and freezes.
252 * disable it by default.
254 if (rdev->family == CHIP_RV515)
256 if (rdev->flags & RADEON_IS_IGP) {
257 /* APUs work fine with MSIs */
258 if (rdev->family >= CHIP_PALM)
260 /* lots of IGPs have problems with MSIs */
268 * radeon_irq_kms_init - init driver interrupt info
270 * @rdev: radeon device pointer
272 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
273 * Returns 0 for success, error for failure.
275 int radeon_irq_kms_init(struct radeon_device *rdev)
279 spin_lock_init(&rdev->irq.lock);
280 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
285 rdev->msi_enabled = 0;
287 if (radeon_msi_ok(rdev)) {
288 int ret = pci_enable_msi(rdev->pdev);
290 rdev->msi_enabled = 1;
291 dev_info(rdev->dev, "radeon: using MSI.\n");
295 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
296 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
297 INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func);
299 rdev->irq.installed = true;
300 r = drm_irq_install(rdev->ddev);
302 rdev->irq.installed = false;
303 flush_work(&rdev->hotplug_work);
307 DRM_INFO("radeon: irq initialized.\n");
312 * radeon_irq_kms_fini - tear down driver interrupt info
314 * @rdev: radeon device pointer
316 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
318 void radeon_irq_kms_fini(struct radeon_device *rdev)
320 drm_vblank_cleanup(rdev->ddev);
321 if (rdev->irq.installed) {
322 drm_irq_uninstall(rdev->ddev);
323 rdev->irq.installed = false;
324 if (rdev->msi_enabled)
325 pci_disable_msi(rdev->pdev);
326 flush_work(&rdev->hotplug_work);
331 * radeon_irq_kms_sw_irq_get - enable software interrupt
333 * @rdev: radeon device pointer
334 * @ring: ring whose interrupt you want to enable
336 * Enables the software interrupt for a specific ring (all asics).
337 * The software interrupt is generally used to signal a fence on
340 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
342 unsigned long irqflags;
344 if (!rdev->ddev->irq_enabled)
347 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
348 spin_lock_irqsave(&rdev->irq.lock, irqflags);
349 radeon_irq_set(rdev);
350 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
355 * radeon_irq_kms_sw_irq_put - disable software interrupt
357 * @rdev: radeon device pointer
358 * @ring: ring whose interrupt you want to disable
360 * Disables the software interrupt for a specific ring (all asics).
361 * The software interrupt is generally used to signal a fence on
364 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
366 unsigned long irqflags;
368 if (!rdev->ddev->irq_enabled)
371 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
372 spin_lock_irqsave(&rdev->irq.lock, irqflags);
373 radeon_irq_set(rdev);
374 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
379 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
381 * @rdev: radeon device pointer
382 * @crtc: crtc whose interrupt you want to enable
384 * Enables the pageflip interrupt for a specific crtc (all asics).
385 * For pageflips we use the vblank interrupt source.
387 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
389 unsigned long irqflags;
391 if (crtc < 0 || crtc >= rdev->num_crtc)
394 if (!rdev->ddev->irq_enabled)
397 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
398 spin_lock_irqsave(&rdev->irq.lock, irqflags);
399 radeon_irq_set(rdev);
400 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
405 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
407 * @rdev: radeon device pointer
408 * @crtc: crtc whose interrupt you want to disable
410 * Disables the pageflip interrupt for a specific crtc (all asics).
411 * For pageflips we use the vblank interrupt source.
413 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
415 unsigned long irqflags;
417 if (crtc < 0 || crtc >= rdev->num_crtc)
420 if (!rdev->ddev->irq_enabled)
423 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
424 spin_lock_irqsave(&rdev->irq.lock, irqflags);
425 radeon_irq_set(rdev);
426 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
431 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
433 * @rdev: radeon device pointer
434 * @block: afmt block whose interrupt you want to enable
436 * Enables the afmt change interrupt for a specific afmt block (all asics).
438 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
440 unsigned long irqflags;
442 if (!rdev->ddev->irq_enabled)
445 spin_lock_irqsave(&rdev->irq.lock, irqflags);
446 rdev->irq.afmt[block] = true;
447 radeon_irq_set(rdev);
448 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
453 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
455 * @rdev: radeon device pointer
456 * @block: afmt block whose interrupt you want to disable
458 * Disables the afmt change interrupt for a specific afmt block (all asics).
460 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
462 unsigned long irqflags;
464 if (!rdev->ddev->irq_enabled)
467 spin_lock_irqsave(&rdev->irq.lock, irqflags);
468 rdev->irq.afmt[block] = false;
469 radeon_irq_set(rdev);
470 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
474 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
476 * @rdev: radeon device pointer
477 * @hpd_mask: mask of hpd pins you want to enable.
479 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
481 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
483 unsigned long irqflags;
486 if (!rdev->ddev->irq_enabled)
489 spin_lock_irqsave(&rdev->irq.lock, irqflags);
490 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
491 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
492 radeon_irq_set(rdev);
493 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
497 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
499 * @rdev: radeon device pointer
500 * @hpd_mask: mask of hpd pins you want to disable.
502 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
504 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
506 unsigned long irqflags;
509 if (!rdev->ddev->irq_enabled)
512 spin_lock_irqsave(&rdev->irq.lock, irqflags);
513 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
514 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
515 radeon_irq_set(rdev);
516 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);