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 #include <linux/pm_runtime.h> 36 37 #define RADEON_WAIT_IDLE_TIMEOUT 200 38 39 /** 40 * radeon_driver_irq_handler_kms - irq handler for KMS 41 * 42 * @int irq, void *arg: args 43 * 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. 47 */ 48 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 49 { 50 struct drm_device *dev = (struct drm_device *) arg; 51 struct radeon_device *rdev = dev->dev_private; 52 irqreturn_t ret; 53 54 ret = radeon_irq_process(rdev); 55 if (ret == IRQ_HANDLED) 56 pm_runtime_mark_last_busy(dev->dev); 57 return ret; 58 } 59 60 /* 61 * Handle hotplug events outside the interrupt handler proper. 62 */ 63 /** 64 * radeon_hotplug_work_func - display hotplug work handler 65 * 66 * @work: work struct 67 * 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. 73 */ 74 static void radeon_hotplug_work_func(struct work_struct *work) 75 { 76 struct radeon_device *rdev = container_of(work, struct radeon_device, 77 hotplug_work); 78 struct drm_device *dev = rdev->ddev; 79 struct drm_mode_config *mode_config = &dev->mode_config; 80 struct drm_connector *connector; 81 82 /* we can race here at startup, some boards seem to trigger 83 * hotplug irqs when they shouldn't. */ 84 if (!rdev->mode_info.mode_config_initialized) 85 return; 86 87 mutex_lock(&mode_config->mutex); 88 if (mode_config->num_connector) { 89 list_for_each_entry(connector, &mode_config->connector_list, head) 90 radeon_connector_hotplug(connector); 91 } 92 mutex_unlock(&mode_config->mutex); 93 /* Just fire off a uevent and let userspace tell us what to do */ 94 drm_helper_hpd_irq_event(dev); 95 } 96 97 static void radeon_dp_work_func(struct work_struct *work) 98 { 99 struct radeon_device *rdev = container_of(work, struct radeon_device, 100 dp_work); 101 struct drm_device *dev = rdev->ddev; 102 struct drm_mode_config *mode_config = &dev->mode_config; 103 struct drm_connector *connector; 104 105 /* this should take a mutex */ 106 if (mode_config->num_connector) { 107 list_for_each_entry(connector, &mode_config->connector_list, head) 108 radeon_connector_hotplug(connector); 109 } 110 } 111 /** 112 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 113 * 114 * @dev: drm dev pointer 115 * 116 * Gets the hw ready to enable irqs (all asics). 117 * This function disables all interrupt sources on the GPU. 118 */ 119 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 120 { 121 struct radeon_device *rdev = dev->dev_private; 122 unsigned long irqflags; 123 unsigned i; 124 125 spin_lock_irqsave(&rdev->irq.lock, irqflags); 126 /* Disable *all* interrupts */ 127 for (i = 0; i < RADEON_NUM_RINGS; i++) 128 atomic_set(&rdev->irq.ring_int[i], 0); 129 rdev->irq.dpm_thermal = false; 130 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 131 rdev->irq.hpd[i] = false; 132 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 133 rdev->irq.crtc_vblank_int[i] = false; 134 atomic_set(&rdev->irq.pflip[i], 0); 135 rdev->irq.afmt[i] = false; 136 } 137 radeon_irq_set(rdev); 138 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 139 /* Clear bits */ 140 radeon_irq_process(rdev); 141 } 142 143 /** 144 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 145 * 146 * @dev: drm dev pointer 147 * 148 * Handles stuff to be done after enabling irqs (all asics). 149 * Returns 0 on success. 150 */ 151 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 152 { 153 struct radeon_device *rdev = dev->dev_private; 154 155 if (ASIC_IS_AVIVO(rdev)) 156 dev->max_vblank_count = 0x00ffffff; 157 else 158 dev->max_vblank_count = 0x001fffff; 159 160 return 0; 161 } 162 163 /** 164 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 165 * 166 * @dev: drm dev pointer 167 * 168 * This function disables all interrupt sources on the GPU (all asics). 169 */ 170 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 171 { 172 struct radeon_device *rdev = dev->dev_private; 173 unsigned long irqflags; 174 unsigned i; 175 176 if (rdev == NULL) { 177 return; 178 } 179 spin_lock_irqsave(&rdev->irq.lock, irqflags); 180 /* Disable *all* interrupts */ 181 for (i = 0; i < RADEON_NUM_RINGS; i++) 182 atomic_set(&rdev->irq.ring_int[i], 0); 183 rdev->irq.dpm_thermal = false; 184 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 185 rdev->irq.hpd[i] = false; 186 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 187 rdev->irq.crtc_vblank_int[i] = false; 188 atomic_set(&rdev->irq.pflip[i], 0); 189 rdev->irq.afmt[i] = false; 190 } 191 radeon_irq_set(rdev); 192 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 193 } 194 195 /** 196 * radeon_msi_ok - asic specific msi checks 197 * 198 * @rdev: radeon device pointer 199 * 200 * Handles asic specific MSI checks to determine if 201 * MSIs should be enabled on a particular chip (all asics). 202 * Returns true if MSIs should be enabled, false if MSIs 203 * should not be enabled. 204 */ 205 static bool radeon_msi_ok(struct radeon_device *rdev) 206 { 207 /* RV370/RV380 was first asic with MSI support */ 208 if (rdev->family < CHIP_RV380) 209 return false; 210 211 /* MSIs don't work on AGP */ 212 if (rdev->flags & RADEON_IS_AGP) 213 return false; 214 215 /* 216 * Older chips have a HW limitation, they can only generate 40 bits 217 * of address for "64-bit" MSIs which breaks on some platforms, notably 218 * IBM POWER servers, so we limit them 219 */ 220 if (rdev->family < CHIP_BONAIRE) { 221 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 222 rdev->pdev->no_64bit_msi = 1; 223 } 224 225 /* force MSI on */ 226 if (radeon_msi == 1) 227 return true; 228 else if (radeon_msi == 0) 229 return false; 230 231 /* Quirks */ 232 /* HP RS690 only seems to work with MSIs. */ 233 if ((rdev->pdev->device == 0x791f) && 234 (rdev->pdev->subsystem_vendor == 0x103c) && 235 (rdev->pdev->subsystem_device == 0x30c2)) 236 return true; 237 238 /* Dell RS690 only seems to work with MSIs. */ 239 if ((rdev->pdev->device == 0x791f) && 240 (rdev->pdev->subsystem_vendor == 0x1028) && 241 (rdev->pdev->subsystem_device == 0x01fc)) 242 return true; 243 244 /* Dell RS690 only seems to work with MSIs. */ 245 if ((rdev->pdev->device == 0x791f) && 246 (rdev->pdev->subsystem_vendor == 0x1028) && 247 (rdev->pdev->subsystem_device == 0x01fd)) 248 return true; 249 250 /* Gateway RS690 only seems to work with MSIs. */ 251 if ((rdev->pdev->device == 0x791f) && 252 (rdev->pdev->subsystem_vendor == 0x107b) && 253 (rdev->pdev->subsystem_device == 0x0185)) 254 return true; 255 256 /* try and enable MSIs by default on all RS690s */ 257 if (rdev->family == CHIP_RS690) 258 return true; 259 260 /* RV515 seems to have MSI issues where it loses 261 * MSI rearms occasionally. This leads to lockups and freezes. 262 * disable it by default. 263 */ 264 if (rdev->family == CHIP_RV515) 265 return false; 266 if (rdev->flags & RADEON_IS_IGP) { 267 /* APUs work fine with MSIs */ 268 if (rdev->family >= CHIP_PALM) 269 return true; 270 /* lots of IGPs have problems with MSIs */ 271 return false; 272 } 273 274 return true; 275 } 276 277 /** 278 * radeon_irq_kms_init - init driver interrupt info 279 * 280 * @rdev: radeon device pointer 281 * 282 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 283 * Returns 0 for success, error for failure. 284 */ 285 int radeon_irq_kms_init(struct radeon_device *rdev) 286 { 287 int r = 0; 288 289 spin_lock_init(&rdev->irq.lock); 290 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 291 if (r) { 292 return r; 293 } 294 /* enable msi */ 295 rdev->msi_enabled = 0; 296 297 if (radeon_msi_ok(rdev)) { 298 int ret = pci_enable_msi(rdev->pdev); 299 if (!ret) { 300 rdev->msi_enabled = 1; 301 dev_info(rdev->dev, "radeon: using MSI.\n"); 302 } 303 } 304 305 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 306 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 307 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 308 309 rdev->irq.installed = true; 310 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 311 if (r) { 312 rdev->irq.installed = false; 313 flush_work(&rdev->hotplug_work); 314 return r; 315 } 316 317 DRM_INFO("radeon: irq initialized.\n"); 318 return 0; 319 } 320 321 /** 322 * radeon_irq_kms_fini - tear down driver interrupt info 323 * 324 * @rdev: radeon device pointer 325 * 326 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 327 */ 328 void radeon_irq_kms_fini(struct radeon_device *rdev) 329 { 330 drm_vblank_cleanup(rdev->ddev); 331 if (rdev->irq.installed) { 332 drm_irq_uninstall(rdev->ddev); 333 rdev->irq.installed = false; 334 if (rdev->msi_enabled) 335 pci_disable_msi(rdev->pdev); 336 flush_work(&rdev->hotplug_work); 337 } 338 } 339 340 /** 341 * radeon_irq_kms_sw_irq_get - enable software interrupt 342 * 343 * @rdev: radeon device pointer 344 * @ring: ring whose interrupt you want to enable 345 * 346 * Enables the software interrupt for a specific ring (all asics). 347 * The software interrupt is generally used to signal a fence on 348 * a particular ring. 349 */ 350 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 351 { 352 unsigned long irqflags; 353 354 if (!rdev->ddev->irq_enabled) 355 return; 356 357 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 358 spin_lock_irqsave(&rdev->irq.lock, irqflags); 359 radeon_irq_set(rdev); 360 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 361 } 362 } 363 364 /** 365 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 366 * 367 * @rdev: radeon device pointer 368 * @ring: ring whose interrupt you want to enable 369 * 370 * Enables the software interrupt for a specific ring (all asics). 371 * The software interrupt is generally used to signal a fence on 372 * a particular ring. 373 */ 374 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 375 { 376 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 377 } 378 379 /** 380 * radeon_irq_kms_sw_irq_put - disable software interrupt 381 * 382 * @rdev: radeon device pointer 383 * @ring: ring whose interrupt you want to disable 384 * 385 * Disables the software interrupt for a specific ring (all asics). 386 * The software interrupt is generally used to signal a fence on 387 * a particular ring. 388 */ 389 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 390 { 391 unsigned long irqflags; 392 393 if (!rdev->ddev->irq_enabled) 394 return; 395 396 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 397 spin_lock_irqsave(&rdev->irq.lock, irqflags); 398 radeon_irq_set(rdev); 399 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 400 } 401 } 402 403 /** 404 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 405 * 406 * @rdev: radeon device pointer 407 * @crtc: crtc whose interrupt you want to enable 408 * 409 * Enables the pageflip interrupt for a specific crtc (all asics). 410 * For pageflips we use the vblank interrupt source. 411 */ 412 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 413 { 414 unsigned long irqflags; 415 416 if (crtc < 0 || crtc >= rdev->num_crtc) 417 return; 418 419 if (!rdev->ddev->irq_enabled) 420 return; 421 422 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 423 spin_lock_irqsave(&rdev->irq.lock, irqflags); 424 radeon_irq_set(rdev); 425 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 426 } 427 } 428 429 /** 430 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 431 * 432 * @rdev: radeon device pointer 433 * @crtc: crtc whose interrupt you want to disable 434 * 435 * Disables the pageflip interrupt for a specific crtc (all asics). 436 * For pageflips we use the vblank interrupt source. 437 */ 438 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 439 { 440 unsigned long irqflags; 441 442 if (crtc < 0 || crtc >= rdev->num_crtc) 443 return; 444 445 if (!rdev->ddev->irq_enabled) 446 return; 447 448 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 449 spin_lock_irqsave(&rdev->irq.lock, irqflags); 450 radeon_irq_set(rdev); 451 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 452 } 453 } 454 455 /** 456 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 457 * 458 * @rdev: radeon device pointer 459 * @block: afmt block whose interrupt you want to enable 460 * 461 * Enables the afmt change interrupt for a specific afmt block (all asics). 462 */ 463 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 464 { 465 unsigned long irqflags; 466 467 if (!rdev->ddev->irq_enabled) 468 return; 469 470 spin_lock_irqsave(&rdev->irq.lock, irqflags); 471 rdev->irq.afmt[block] = true; 472 radeon_irq_set(rdev); 473 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 474 475 } 476 477 /** 478 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 479 * 480 * @rdev: radeon device pointer 481 * @block: afmt block whose interrupt you want to disable 482 * 483 * Disables the afmt change interrupt for a specific afmt block (all asics). 484 */ 485 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 486 { 487 unsigned long irqflags; 488 489 if (!rdev->ddev->irq_enabled) 490 return; 491 492 spin_lock_irqsave(&rdev->irq.lock, irqflags); 493 rdev->irq.afmt[block] = false; 494 radeon_irq_set(rdev); 495 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 496 } 497 498 /** 499 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 500 * 501 * @rdev: radeon device pointer 502 * @hpd_mask: mask of hpd pins you want to enable. 503 * 504 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 505 */ 506 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 507 { 508 unsigned long irqflags; 509 int i; 510 511 if (!rdev->ddev->irq_enabled) 512 return; 513 514 spin_lock_irqsave(&rdev->irq.lock, irqflags); 515 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 516 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 517 radeon_irq_set(rdev); 518 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 519 } 520 521 /** 522 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 523 * 524 * @rdev: radeon device pointer 525 * @hpd_mask: mask of hpd pins you want to disable. 526 * 527 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 528 */ 529 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 530 { 531 unsigned long irqflags; 532 int i; 533 534 if (!rdev->ddev->irq_enabled) 535 return; 536 537 spin_lock_irqsave(&rdev->irq.lock, irqflags); 538 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 539 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 540 radeon_irq_set(rdev); 541 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 542 } 543 544