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 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <dev/drm2/drmP.h> 33#include <dev/drm2/drm_crtc_helper.h> 34#include <dev/drm2/radeon/radeon_drm.h> 35#include "radeon_reg.h" 36#include "radeon_irq_kms.h" 37#include "radeon.h" 38#include "atom.h" 39 40#define RADEON_WAIT_IDLE_TIMEOUT 200 41 42/** 43 * radeon_driver_irq_handler_kms - irq handler for KMS 44 * 45 * @DRM_IRQ_ARGS: args 46 * 47 * This is the irq handler for the radeon KMS driver (all asics). 48 * radeon_irq_process is a macro that points to the per-asic 49 * irq handler callback. 50 */ 51irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 52{ 53 struct drm_device *dev = (struct drm_device *) arg; 54 struct radeon_device *rdev = dev->dev_private; 55 56 return radeon_irq_process(rdev); 57} 58 59/* 60 * Handle hotplug events outside the interrupt handler proper. 61 */ 62/** 63 * radeon_hotplug_work_func - display hotplug work handler 64 * 65 * @work: work struct 66 * 67 * This is the hot plug event work handler (all asics). 68 * The work gets scheduled from the irq handler if there 69 * was a hot plug interrupt. It walks the connector table 70 * and calls the hotplug handler for each one, then sends 71 * a drm hotplug event to alert userspace. 72 */ 73static void radeon_hotplug_work_func(void *arg, int pending) 74{ 75 struct radeon_device *rdev = arg; 76 struct drm_device *dev = rdev->ddev; 77 struct drm_mode_config *mode_config = &dev->mode_config; 78 struct drm_connector *connector; 79 80 if (mode_config->num_connector) { 81 list_for_each_entry(connector, &mode_config->connector_list, head) 82 radeon_connector_hotplug(connector); 83 } 84 /* Just fire off a uevent and let userspace tell us what to do */ 85 drm_helper_hpd_irq_event(dev); 86} 87 88/** 89 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 90 * 91 * @dev: drm dev pointer 92 * 93 * Gets the hw ready to enable irqs (all asics). 94 * This function disables all interrupt sources on the GPU. 95 */ 96void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 97{ 98 struct radeon_device *rdev = dev->dev_private; 99 unsigned long irqflags; 100 unsigned i; 101 102 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 103 /* Disable *all* interrupts */ 104 for (i = 0; i < RADEON_NUM_RINGS; i++) 105 atomic_set(&rdev->irq.ring_int[i], 0); 106 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 107 rdev->irq.hpd[i] = false; 108 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 109 rdev->irq.crtc_vblank_int[i] = false; 110 atomic_set(&rdev->irq.pflip[i], 0); 111 rdev->irq.afmt[i] = false; 112 } 113 radeon_irq_set(rdev); 114 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 115 /* Clear bits */ 116 radeon_irq_process(rdev); 117} 118 119/** 120 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 121 * 122 * @dev: drm dev pointer 123 * 124 * Handles stuff to be done after enabling irqs (all asics). 125 * Returns 0 on success. 126 */ 127int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 128{ 129 dev->max_vblank_count = 0x001fffff; 130 return 0; 131} 132 133/** 134 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 135 * 136 * @dev: drm dev pointer 137 * 138 * This function disables all interrupt sources on the GPU (all asics). 139 */ 140void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 141{ 142 struct radeon_device *rdev = dev->dev_private; 143 unsigned long irqflags; 144 unsigned i; 145 146 if (rdev == NULL) { 147 return; 148 } 149 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 150 /* Disable *all* interrupts */ 151 for (i = 0; i < RADEON_NUM_RINGS; i++) 152 atomic_set(&rdev->irq.ring_int[i], 0); 153 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 154 rdev->irq.hpd[i] = false; 155 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 156 rdev->irq.crtc_vblank_int[i] = false; 157 atomic_set(&rdev->irq.pflip[i], 0); 158 rdev->irq.afmt[i] = false; 159 } 160 radeon_irq_set(rdev); 161 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 162} 163 164/** 165 * radeon_msi_ok - asic specific msi checks 166 * 167 * @rdev: radeon device pointer 168 * 169 * Handles asic specific MSI checks to determine if 170 * MSIs should be enabled on a particular chip (all asics). 171 * Returns true if MSIs should be enabled, false if MSIs 172 * should not be enabled. 173 */ 174static bool radeon_msi_ok(struct radeon_device *rdev) 175{ 176 /* RV370/RV380 was first asic with MSI support */ 177 if (rdev->family < CHIP_RV380) 178 return false; 179 180 /* MSIs don't work on AGP */ 181 if (rdev->flags & RADEON_IS_AGP) 182 return false; 183 184 /* force MSI on */ 185 if (radeon_msi == 1) 186 return true; 187 else if (radeon_msi == 0) 188 return false; 189 190 /* Quirks */ 191 /* HP RS690 only seems to work with MSIs. */ 192 if ((rdev->ddev->pci_device == 0x791f) && 193 (rdev->ddev->pci_subvendor == 0x103c) && 194 (rdev->ddev->pci_subdevice == 0x30c2)) 195 return true; 196 197 /* Dell RS690 only seems to work with MSIs. */ 198 if ((rdev->ddev->pci_device == 0x791f) && 199 (rdev->ddev->pci_subvendor == 0x1028) && 200 (rdev->ddev->pci_subdevice == 0x01fc)) 201 return true; 202 203 /* Dell RS690 only seems to work with MSIs. */ 204 if ((rdev->ddev->pci_device == 0x791f) && 205 (rdev->ddev->pci_subvendor == 0x1028) && 206 (rdev->ddev->pci_subdevice == 0x01fd)) 207 return true; 208 209 /* Gateway RS690 only seems to work with MSIs. */ 210 if ((rdev->ddev->pci_device == 0x791f) && 211 (rdev->ddev->pci_subvendor == 0x107b) && 212 (rdev->ddev->pci_subdevice == 0x0185)) 213 return true; 214 215 /* try and enable MSIs by default on all RS690s */ 216 if (rdev->family == CHIP_RS690) 217 return true; 218 219 /* RV515 seems to have MSI issues where it loses 220 * MSI rearms occasionally. This leads to lockups and freezes. 221 * disable it by default. 222 */ 223 if (rdev->family == CHIP_RV515) 224 return false; 225 if (rdev->flags & RADEON_IS_IGP) { 226 /* APUs work fine with MSIs */ 227 if (rdev->family >= CHIP_PALM) 228 return true; 229 /* lots of IGPs have problems with MSIs */ 230 return false; 231 } 232 233 return true; 234} 235 236/** 237 * radeon_irq_kms_init - init driver interrupt info 238 * 239 * @rdev: radeon device pointer 240 * 241 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 242 * Returns 0 for success, error for failure. 243 */ 244int radeon_irq_kms_init(struct radeon_device *rdev) 245{ 246 int r = 0; 247 248 TASK_INIT(&rdev->hotplug_work, 0, radeon_hotplug_work_func, rdev); 249 TASK_INIT(&rdev->audio_work, 0, r600_audio_update_hdmi, rdev); 250 251 DRM_SPININIT(&rdev->irq.lock, "drm__radeon_device__irq__lock"); 252 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 253 if (r) { 254 return r; 255 } 256 /* enable msi */ 257 rdev->msi_enabled = 0; 258 259 if (radeon_msi_ok(rdev)) { 260 int ret = drm_pci_enable_msi(rdev->ddev); 261 if (!ret) { 262 rdev->msi_enabled = 1; 263 dev_info(rdev->dev, "radeon: using MSI.\n"); 264 } 265 } 266 rdev->irq.installed = true; 267 r = drm_irq_install(rdev->ddev); 268 if (r) { 269 rdev->irq.installed = false; 270 return r; 271 } 272 DRM_INFO("radeon: irq initialized.\n"); 273 return 0; 274} 275 276/** 277 * radeon_irq_kms_fini - tear down driver interrrupt info 278 * 279 * @rdev: radeon device pointer 280 * 281 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 282 */ 283void radeon_irq_kms_fini(struct radeon_device *rdev) 284{ 285 drm_vblank_cleanup(rdev->ddev); 286 if (rdev->irq.installed) { 287 drm_irq_uninstall(rdev->ddev); 288 rdev->irq.installed = false; 289 if (rdev->msi_enabled) 290 drm_pci_disable_msi(rdev->ddev); 291 } 292 taskqueue_drain(rdev->tq, &rdev->hotplug_work); 293} 294 295/** 296 * radeon_irq_kms_sw_irq_get - enable software interrupt 297 * 298 * @rdev: radeon device pointer 299 * @ring: ring whose interrupt you want to enable 300 * 301 * Enables the software interrupt for a specific ring (all asics). 302 * The software interrupt is generally used to signal a fence on 303 * a particular ring. 304 */ 305void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 306{ 307 unsigned long irqflags; 308 309 if (!rdev->ddev->irq_enabled) 310 return; 311 312 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 313 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 314 radeon_irq_set(rdev); 315 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 316 } 317} 318 319/** 320 * radeon_irq_kms_sw_irq_put - disable software interrupt 321 * 322 * @rdev: radeon device pointer 323 * @ring: ring whose interrupt you want to disable 324 * 325 * Disables the software interrupt for a specific ring (all asics). 326 * The software interrupt is generally used to signal a fence on 327 * a particular ring. 328 */ 329void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 330{ 331 unsigned long irqflags; 332 333 if (!rdev->ddev->irq_enabled) 334 return; 335 336 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 337 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 338 radeon_irq_set(rdev); 339 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 340 } 341} 342 343/** 344 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 345 * 346 * @rdev: radeon device pointer 347 * @crtc: crtc whose interrupt you want to enable 348 * 349 * Enables the pageflip interrupt for a specific crtc (all asics). 350 * For pageflips we use the vblank interrupt source. 351 */ 352void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 353{ 354 unsigned long irqflags; 355 356 if (crtc < 0 || crtc >= rdev->num_crtc) 357 return; 358 359 if (!rdev->ddev->irq_enabled) 360 return; 361 362 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 363 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 364 radeon_irq_set(rdev); 365 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 366 } 367} 368 369/** 370 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 371 * 372 * @rdev: radeon device pointer 373 * @crtc: crtc whose interrupt you want to disable 374 * 375 * Disables the pageflip interrupt for a specific crtc (all asics). 376 * For pageflips we use the vblank interrupt source. 377 */ 378void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 379{ 380 unsigned long irqflags; 381 382 if (crtc < 0 || crtc >= rdev->num_crtc) 383 return; 384 385 if (!rdev->ddev->irq_enabled) 386 return; 387 388 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 389 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 390 radeon_irq_set(rdev); 391 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 392 } 393} 394 395/** 396 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 397 * 398 * @rdev: radeon device pointer 399 * @block: afmt block whose interrupt you want to enable 400 * 401 * Enables the afmt change interrupt for a specific afmt block (all asics). 402 */ 403void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 404{ 405 unsigned long irqflags; 406 407 if (!rdev->ddev->irq_enabled) 408 return; 409 410 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 411 rdev->irq.afmt[block] = true; 412 radeon_irq_set(rdev); 413 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 414 415} 416 417/** 418 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 419 * 420 * @rdev: radeon device pointer 421 * @block: afmt block whose interrupt you want to disable 422 * 423 * Disables the afmt change interrupt for a specific afmt block (all asics). 424 */ 425void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 426{ 427 unsigned long irqflags; 428 429 if (!rdev->ddev->irq_enabled) 430 return; 431 432 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 433 rdev->irq.afmt[block] = false; 434 radeon_irq_set(rdev); 435 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 436} 437 438/** 439 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 440 * 441 * @rdev: radeon device pointer 442 * @hpd_mask: mask of hpd pins you want to enable. 443 * 444 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 445 */ 446void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 447{ 448 unsigned long irqflags; 449 int i; 450 451 if (!rdev->ddev->irq_enabled) 452 return; 453 454 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 455 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 456 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 457 radeon_irq_set(rdev); 458 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 459} 460 461/** 462 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 463 * 464 * @rdev: radeon device pointer 465 * @hpd_mask: mask of hpd pins you want to disable. 466 * 467 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 468 */ 469void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 470{ 471 unsigned long irqflags; 472 int i; 473 474 if (!rdev->ddev->irq_enabled) 475 return; 476 477 DRM_SPINLOCK_IRQSAVE(&rdev->irq.lock, irqflags); 478 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 479 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 480 radeon_irq_set(rdev); 481 DRM_SPINUNLOCK_IRQRESTORE(&rdev->irq.lock, irqflags); 482} 483 484