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 <linux/pci.h> 30 #include <linux/pm_runtime.h> 31 32 #include <drm/drm_device.h> 33 #include <drm/drm_drv.h> 34 #include <drm/drm_probe_helper.h> 35 #include <drm/drm_vblank.h> 36 #include <drm/radeon_drm.h> 37 38 #include "atom.h" 39 #include "radeon.h" 40 #include "radeon_kms.h" 41 #include "radeon_reg.h" 42 43 44 #define RADEON_WAIT_IDLE_TIMEOUT 200 45 46 /* 47 * radeon_driver_irq_handler_kms - irq handler for KMS 48 * 49 * This is the irq handler for the radeon KMS driver (all asics). 50 * radeon_irq_process is a macro that points to the per-asic 51 * irq handler callback. 52 */ 53 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 54 { 55 struct drm_device *dev = (struct drm_device *) arg; 56 struct radeon_device *rdev = dev->dev_private; 57 irqreturn_t ret; 58 59 ret = radeon_irq_process(rdev); 60 if (ret == IRQ_HANDLED) 61 pm_runtime_mark_last_busy(dev->dev); 62 return ret; 63 } 64 65 /* 66 * Handle hotplug events outside the interrupt handler proper. 67 */ 68 /** 69 * radeon_hotplug_work_func - display hotplug work handler 70 * 71 * @work: work struct 72 * 73 * This is the hot plug event work handler (all asics). 74 * The work gets scheduled from the irq handler if there 75 * was a hot plug interrupt. It walks the connector table 76 * and calls the hotplug handler for each one, then sends 77 * a drm hotplug event to alert userspace. 78 */ 79 static void radeon_hotplug_work_func(struct work_struct *work) 80 { 81 struct radeon_device *rdev = container_of(work, struct radeon_device, 82 hotplug_work.work); 83 struct drm_device *dev = rdev_to_drm(rdev); 84 struct drm_mode_config *mode_config = &dev->mode_config; 85 struct drm_connector *connector; 86 87 /* we can race here at startup, some boards seem to trigger 88 * hotplug irqs when they shouldn't. */ 89 if (!rdev->mode_info.mode_config_initialized) 90 return; 91 92 mutex_lock(&mode_config->mutex); 93 list_for_each_entry(connector, &mode_config->connector_list, head) 94 radeon_connector_hotplug(connector); 95 mutex_unlock(&mode_config->mutex); 96 /* Just fire off a uevent and let userspace tell us what to do */ 97 drm_helper_hpd_irq_event(dev); 98 } 99 100 static void radeon_dp_work_func(struct work_struct *work) 101 { 102 struct radeon_device *rdev = container_of(work, struct radeon_device, 103 dp_work); 104 struct drm_device *dev = rdev_to_drm(rdev); 105 struct drm_mode_config *mode_config = &dev->mode_config; 106 struct drm_connector *connector; 107 108 mutex_lock(&mode_config->mutex); 109 list_for_each_entry(connector, &mode_config->connector_list, head) 110 radeon_connector_hotplug(connector); 111 mutex_unlock(&mode_config->mutex); 112 } 113 114 /** 115 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 116 * 117 * @dev: drm dev pointer 118 * 119 * Gets the hw ready to enable irqs (all asics). 120 * This function disables all interrupt sources on the GPU. 121 */ 122 static void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 123 { 124 struct radeon_device *rdev = dev->dev_private; 125 unsigned long irqflags; 126 unsigned i; 127 128 spin_lock_irqsave(&rdev->irq.lock, irqflags); 129 /* Disable *all* interrupts */ 130 for (i = 0; i < RADEON_NUM_RINGS; i++) 131 atomic_set(&rdev->irq.ring_int[i], 0); 132 rdev->irq.dpm_thermal = false; 133 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 134 rdev->irq.hpd[i] = false; 135 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 136 rdev->irq.crtc_vblank_int[i] = false; 137 atomic_set(&rdev->irq.pflip[i], 0); 138 rdev->irq.afmt[i] = false; 139 } 140 radeon_irq_set(rdev); 141 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 142 /* Clear bits */ 143 radeon_irq_process(rdev); 144 } 145 146 /** 147 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 148 * 149 * @dev: drm dev pointer 150 * 151 * Handles stuff to be done after enabling irqs (all asics). 152 * Returns 0 on success. 153 */ 154 static int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 155 { 156 struct radeon_device *rdev = dev->dev_private; 157 158 if (ASIC_IS_AVIVO(rdev)) 159 dev->max_vblank_count = 0x00ffffff; 160 else 161 dev->max_vblank_count = 0x001fffff; 162 163 return 0; 164 } 165 166 /** 167 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 168 * 169 * @dev: drm dev pointer 170 * 171 * This function disables all interrupt sources on the GPU (all asics). 172 */ 173 static void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 174 { 175 struct radeon_device *rdev = dev->dev_private; 176 unsigned long irqflags; 177 unsigned i; 178 179 if (rdev == NULL) { 180 return; 181 } 182 spin_lock_irqsave(&rdev->irq.lock, irqflags); 183 /* Disable *all* interrupts */ 184 for (i = 0; i < RADEON_NUM_RINGS; i++) 185 atomic_set(&rdev->irq.ring_int[i], 0); 186 rdev->irq.dpm_thermal = false; 187 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 188 rdev->irq.hpd[i] = false; 189 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 190 rdev->irq.crtc_vblank_int[i] = false; 191 atomic_set(&rdev->irq.pflip[i], 0); 192 rdev->irq.afmt[i] = false; 193 } 194 radeon_irq_set(rdev); 195 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 196 } 197 198 static int radeon_irq_install(struct radeon_device *rdev, int irq) 199 { 200 struct drm_device *dev = rdev_to_drm(rdev); 201 int ret; 202 203 if (irq == IRQ_NOTCONNECTED) 204 return -ENOTCONN; 205 206 radeon_driver_irq_preinstall_kms(dev); 207 208 /* PCI devices require shared interrupts. */ 209 ret = request_irq(irq, radeon_driver_irq_handler_kms, 210 IRQF_SHARED, dev->driver->name, dev); 211 if (ret) 212 return ret; 213 214 radeon_driver_irq_postinstall_kms(dev); 215 216 return 0; 217 } 218 219 static void radeon_irq_uninstall(struct radeon_device *rdev) 220 { 221 struct drm_device *dev = rdev_to_drm(rdev); 222 struct pci_dev *pdev = to_pci_dev(dev->dev); 223 224 radeon_driver_irq_uninstall_kms(dev); 225 free_irq(pdev->irq, dev); 226 } 227 228 /** 229 * radeon_msi_ok - asic specific msi checks 230 * 231 * @rdev: radeon device pointer 232 * 233 * Handles asic specific MSI checks to determine if 234 * MSIs should be enabled on a particular chip (all asics). 235 * Returns true if MSIs should be enabled, false if MSIs 236 * should not be enabled. 237 */ 238 static bool radeon_msi_ok(struct radeon_device *rdev) 239 { 240 /* RV370/RV380 was first asic with MSI support */ 241 if (rdev->family < CHIP_RV380) 242 return false; 243 244 /* MSIs don't work on AGP */ 245 if (rdev->flags & RADEON_IS_AGP) 246 return false; 247 248 /* force MSI on */ 249 if (radeon_msi == 1) 250 return true; 251 else if (radeon_msi == 0) 252 return false; 253 254 /* Quirks */ 255 /* HP RS690 only seems to work with MSIs. */ 256 if ((rdev->pdev->device == 0x791f) && 257 (rdev->pdev->subsystem_vendor == 0x103c) && 258 (rdev->pdev->subsystem_device == 0x30c2)) 259 return true; 260 261 /* Dell RS690 only seems to work with MSIs. */ 262 if ((rdev->pdev->device == 0x791f) && 263 (rdev->pdev->subsystem_vendor == 0x1028) && 264 (rdev->pdev->subsystem_device == 0x01fc)) 265 return true; 266 267 /* Dell RS690 only seems to work with MSIs. */ 268 if ((rdev->pdev->device == 0x791f) && 269 (rdev->pdev->subsystem_vendor == 0x1028) && 270 (rdev->pdev->subsystem_device == 0x01fd)) 271 return true; 272 273 /* Gateway RS690 only seems to work with MSIs. */ 274 if ((rdev->pdev->device == 0x791f) && 275 (rdev->pdev->subsystem_vendor == 0x107b) && 276 (rdev->pdev->subsystem_device == 0x0185)) 277 return true; 278 279 /* try and enable MSIs by default on all RS690s */ 280 if (rdev->family == CHIP_RS690) 281 return true; 282 283 /* RV515 seems to have MSI issues where it loses 284 * MSI rearms occasionally. This leads to lockups and freezes. 285 * disable it by default. 286 */ 287 if (rdev->family == CHIP_RV515) 288 return false; 289 if (rdev->flags & RADEON_IS_IGP) { 290 /* APUs work fine with MSIs */ 291 if (rdev->family >= CHIP_PALM) 292 return true; 293 /* lots of IGPs have problems with MSIs */ 294 return false; 295 } 296 297 return true; 298 } 299 300 /** 301 * radeon_irq_kms_init - init driver interrupt info 302 * 303 * @rdev: radeon device pointer 304 * 305 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 306 * Returns 0 for success, error for failure. 307 */ 308 int radeon_irq_kms_init(struct radeon_device *rdev) 309 { 310 int r = 0; 311 312 spin_lock_init(&rdev->irq.lock); 313 314 /* Disable vblank irqs aggressively for power-saving */ 315 rdev_to_drm(rdev)->vblank_disable_immediate = true; 316 317 r = drm_vblank_init(rdev_to_drm(rdev), rdev->num_crtc); 318 if (r) { 319 return r; 320 } 321 322 /* enable msi */ 323 rdev->msi_enabled = 0; 324 325 if (radeon_msi_ok(rdev)) { 326 int ret = pci_enable_msi(rdev->pdev); 327 if (!ret) { 328 rdev->msi_enabled = 1; 329 dev_info(rdev->dev, "radeon: using MSI.\n"); 330 } 331 } 332 333 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 334 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 335 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 336 337 rdev->irq.installed = true; 338 r = radeon_irq_install(rdev, rdev->pdev->irq); 339 if (r) { 340 rdev->irq.installed = false; 341 flush_delayed_work(&rdev->hotplug_work); 342 return r; 343 } 344 345 DRM_INFO("radeon: irq initialized.\n"); 346 return 0; 347 } 348 349 /** 350 * radeon_irq_kms_fini - tear down driver interrupt info 351 * 352 * @rdev: radeon device pointer 353 * 354 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 355 */ 356 void radeon_irq_kms_fini(struct radeon_device *rdev) 357 { 358 if (rdev->irq.installed) { 359 radeon_irq_uninstall(rdev); 360 rdev->irq.installed = false; 361 if (rdev->msi_enabled) 362 pci_disable_msi(rdev->pdev); 363 flush_delayed_work(&rdev->hotplug_work); 364 } 365 } 366 367 /** 368 * radeon_irq_kms_sw_irq_get - enable software interrupt 369 * 370 * @rdev: radeon device pointer 371 * @ring: ring whose interrupt you want to enable 372 * 373 * Enables the software interrupt for a specific ring (all asics). 374 * The software interrupt is generally used to signal a fence on 375 * a particular ring. 376 */ 377 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 378 { 379 unsigned long irqflags; 380 381 if (!rdev->irq.installed) 382 return; 383 384 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 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_sw_irq_get_delayed - enable software interrupt 393 * 394 * @rdev: radeon device pointer 395 * @ring: ring whose interrupt you want to enable 396 * 397 * Enables the software interrupt for a specific ring (all asics). 398 * The software interrupt is generally used to signal a fence on 399 * a particular ring. 400 */ 401 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 402 { 403 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 404 } 405 406 /** 407 * radeon_irq_kms_sw_irq_put - disable software interrupt 408 * 409 * @rdev: radeon device pointer 410 * @ring: ring whose interrupt you want to disable 411 * 412 * Disables the software interrupt for a specific ring (all asics). 413 * The software interrupt is generally used to signal a fence on 414 * a particular ring. 415 */ 416 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 417 { 418 unsigned long irqflags; 419 420 if (!rdev->irq.installed) 421 return; 422 423 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 424 spin_lock_irqsave(&rdev->irq.lock, irqflags); 425 radeon_irq_set(rdev); 426 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 427 } 428 } 429 430 /** 431 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 432 * 433 * @rdev: radeon device pointer 434 * @crtc: crtc whose interrupt you want to enable 435 * 436 * Enables the pageflip interrupt for a specific crtc (all asics). 437 * For pageflips we use the vblank interrupt source. 438 */ 439 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 440 { 441 unsigned long irqflags; 442 443 if (crtc < 0 || crtc >= rdev->num_crtc) 444 return; 445 446 if (!rdev->irq.installed) 447 return; 448 449 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 450 spin_lock_irqsave(&rdev->irq.lock, irqflags); 451 radeon_irq_set(rdev); 452 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 453 } 454 } 455 456 /** 457 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 458 * 459 * @rdev: radeon device pointer 460 * @crtc: crtc whose interrupt you want to disable 461 * 462 * Disables the pageflip interrupt for a specific crtc (all asics). 463 * For pageflips we use the vblank interrupt source. 464 */ 465 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 466 { 467 unsigned long irqflags; 468 469 if (crtc < 0 || crtc >= rdev->num_crtc) 470 return; 471 472 if (!rdev->irq.installed) 473 return; 474 475 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 476 spin_lock_irqsave(&rdev->irq.lock, irqflags); 477 radeon_irq_set(rdev); 478 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 479 } 480 } 481 482 /** 483 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 484 * 485 * @rdev: radeon device pointer 486 * @block: afmt block whose interrupt you want to enable 487 * 488 * Enables the afmt change interrupt for a specific afmt block (all asics). 489 */ 490 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 491 { 492 unsigned long irqflags; 493 494 if (!rdev->irq.installed) 495 return; 496 497 spin_lock_irqsave(&rdev->irq.lock, irqflags); 498 rdev->irq.afmt[block] = true; 499 radeon_irq_set(rdev); 500 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 501 502 } 503 504 /** 505 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 506 * 507 * @rdev: radeon device pointer 508 * @block: afmt block whose interrupt you want to disable 509 * 510 * Disables the afmt change interrupt for a specific afmt block (all asics). 511 */ 512 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 513 { 514 unsigned long irqflags; 515 516 if (!rdev->irq.installed) 517 return; 518 519 spin_lock_irqsave(&rdev->irq.lock, irqflags); 520 rdev->irq.afmt[block] = false; 521 radeon_irq_set(rdev); 522 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 523 } 524 525 /** 526 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 527 * 528 * @rdev: radeon device pointer 529 * @hpd_mask: mask of hpd pins you want to enable. 530 * 531 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 532 */ 533 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 534 { 535 unsigned long irqflags; 536 int i; 537 538 if (!rdev->irq.installed) 539 return; 540 541 spin_lock_irqsave(&rdev->irq.lock, irqflags); 542 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 543 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 544 radeon_irq_set(rdev); 545 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 546 } 547 548 /** 549 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 550 * 551 * @rdev: radeon device pointer 552 * @hpd_mask: mask of hpd pins you want to disable. 553 * 554 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 555 */ 556 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 557 { 558 unsigned long irqflags; 559 int i; 560 561 if (!rdev->irq.installed) 562 return; 563 564 spin_lock_irqsave(&rdev->irq.lock, irqflags); 565 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 566 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 567 radeon_irq_set(rdev); 568 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 569 } 570 571 /** 572 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers 573 * 574 * @rdev: radeon device pointer 575 * @reg: the register to write to enable/disable interrupts 576 * @mask: the mask that enables the interrupts 577 * @enable: whether to enable or disable the interrupt register 578 * @name: the name of the interrupt register to print to the kernel log 579 * @n: the number of the interrupt register to print to the kernel log 580 * 581 * Helper for updating the enable state of interrupt registers. Checks whether 582 * or not the interrupt matches the enable state we want. If it doesn't, then 583 * we update it and print a debugging message to the kernel log indicating the 584 * new state of the interrupt register. 585 * 586 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 587 */ 588 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 589 u32 reg, u32 mask, 590 bool enable, const char *name, unsigned n) 591 { 592 u32 tmp = RREG32(reg); 593 594 /* Interrupt state didn't change */ 595 if (!!(tmp & mask) == enable) 596 return; 597 598 if (enable) { 599 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 600 WREG32(reg, tmp |= mask); 601 } else { 602 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 603 WREG32(reg, tmp & ~mask); 604 } 605 } 606