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_crtc_helper.h> 33 #include <drm/drm_device.h> 34 #include <drm/drm_drv.h> 35 #include <drm/drm_probe_helper.h> 36 #include <drm/drm_vblank.h> 37 #include <drm/radeon_drm.h> 38 39 #include "atom.h" 40 #include "radeon.h" 41 #include "radeon_kms.h" 42 #include "radeon_reg.h" 43 44 45 #define RADEON_WAIT_IDLE_TIMEOUT 200 46 47 /* 48 * radeon_driver_irq_handler_kms - irq handler for KMS 49 * 50 * This is the irq handler for the radeon KMS driver (all asics). 51 * radeon_irq_process is a macro that points to the per-asic 52 * irq handler callback. 53 */ 54 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 55 { 56 struct drm_device *dev = (struct drm_device *) arg; 57 struct radeon_device *rdev = dev->dev_private; 58 irqreturn_t ret; 59 60 ret = radeon_irq_process(rdev); 61 if (ret == IRQ_HANDLED) 62 pm_runtime_mark_last_busy(dev->dev); 63 return ret; 64 } 65 66 /* 67 * Handle hotplug events outside the interrupt handler proper. 68 */ 69 /** 70 * radeon_hotplug_work_func - display hotplug work handler 71 * 72 * @work: work struct 73 * 74 * This is the hot plug event work handler (all asics). 75 * The work gets scheduled from the irq handler if there 76 * was a hot plug interrupt. It walks the connector table 77 * and calls the hotplug handler for each one, then sends 78 * a drm hotplug event to alert userspace. 79 */ 80 static void radeon_hotplug_work_func(struct work_struct *work) 81 { 82 struct radeon_device *rdev = container_of(work, struct radeon_device, 83 hotplug_work.work); 84 struct drm_device *dev = rdev->ddev; 85 struct drm_mode_config *mode_config = &dev->mode_config; 86 struct drm_connector *connector; 87 88 /* we can race here at startup, some boards seem to trigger 89 * hotplug irqs when they shouldn't. */ 90 if (!rdev->mode_info.mode_config_initialized) 91 return; 92 93 mutex_lock(&mode_config->mutex); 94 list_for_each_entry(connector, &mode_config->connector_list, head) 95 radeon_connector_hotplug(connector); 96 mutex_unlock(&mode_config->mutex); 97 /* Just fire off a uevent and let userspace tell us what to do */ 98 drm_helper_hpd_irq_event(dev); 99 } 100 101 static void radeon_dp_work_func(struct work_struct *work) 102 { 103 struct radeon_device *rdev = container_of(work, struct radeon_device, 104 dp_work); 105 struct drm_device *dev = rdev->ddev; 106 struct drm_mode_config *mode_config = &dev->mode_config; 107 struct drm_connector *connector; 108 109 /* this should take a mutex */ 110 list_for_each_entry(connector, &mode_config->connector_list, head) 111 radeon_connector_hotplug(connector); 112 } 113 /** 114 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 115 * 116 * @dev: drm dev pointer 117 * 118 * Gets the hw ready to enable irqs (all asics). 119 * This function disables all interrupt sources on the GPU. 120 */ 121 static void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 122 { 123 struct radeon_device *rdev = dev->dev_private; 124 unsigned long irqflags; 125 unsigned i; 126 127 spin_lock_irqsave(&rdev->irq.lock, irqflags); 128 /* Disable *all* interrupts */ 129 for (i = 0; i < RADEON_NUM_RINGS; i++) 130 atomic_set(&rdev->irq.ring_int[i], 0); 131 rdev->irq.dpm_thermal = false; 132 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 133 rdev->irq.hpd[i] = false; 134 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 135 rdev->irq.crtc_vblank_int[i] = false; 136 atomic_set(&rdev->irq.pflip[i], 0); 137 rdev->irq.afmt[i] = false; 138 } 139 radeon_irq_set(rdev); 140 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 141 /* Clear bits */ 142 radeon_irq_process(rdev); 143 } 144 145 /** 146 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 147 * 148 * @dev: drm dev pointer 149 * 150 * Handles stuff to be done after enabling irqs (all asics). 151 * Returns 0 on success. 152 */ 153 static int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 154 { 155 struct radeon_device *rdev = dev->dev_private; 156 157 if (ASIC_IS_AVIVO(rdev)) 158 dev->max_vblank_count = 0x00ffffff; 159 else 160 dev->max_vblank_count = 0x001fffff; 161 162 return 0; 163 } 164 165 /** 166 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 167 * 168 * @dev: drm dev pointer 169 * 170 * This function disables all interrupt sources on the GPU (all asics). 171 */ 172 static void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 173 { 174 struct radeon_device *rdev = dev->dev_private; 175 unsigned long irqflags; 176 unsigned i; 177 178 if (rdev == NULL) { 179 return; 180 } 181 spin_lock_irqsave(&rdev->irq.lock, irqflags); 182 /* Disable *all* interrupts */ 183 for (i = 0; i < RADEON_NUM_RINGS; i++) 184 atomic_set(&rdev->irq.ring_int[i], 0); 185 rdev->irq.dpm_thermal = false; 186 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 187 rdev->irq.hpd[i] = false; 188 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 189 rdev->irq.crtc_vblank_int[i] = false; 190 atomic_set(&rdev->irq.pflip[i], 0); 191 rdev->irq.afmt[i] = false; 192 } 193 radeon_irq_set(rdev); 194 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 195 } 196 197 static int radeon_irq_install(struct radeon_device *rdev, int irq) 198 { 199 struct drm_device *dev = rdev->ddev; 200 int ret; 201 202 if (irq == IRQ_NOTCONNECTED) 203 return -ENOTCONN; 204 205 radeon_driver_irq_preinstall_kms(dev); 206 207 /* PCI devices require shared interrupts. */ 208 ret = request_irq(irq, radeon_driver_irq_handler_kms, 209 IRQF_SHARED, dev->driver->name, dev); 210 if (ret) 211 return ret; 212 213 radeon_driver_irq_postinstall_kms(dev); 214 215 return 0; 216 } 217 218 static void radeon_irq_uninstall(struct radeon_device *rdev) 219 { 220 struct drm_device *dev = rdev->ddev; 221 struct pci_dev *pdev = to_pci_dev(dev->dev); 222 223 radeon_driver_irq_uninstall_kms(dev); 224 free_irq(pdev->irq, dev); 225 } 226 227 /** 228 * radeon_msi_ok - asic specific msi checks 229 * 230 * @rdev: radeon device pointer 231 * 232 * Handles asic specific MSI checks to determine if 233 * MSIs should be enabled on a particular chip (all asics). 234 * Returns true if MSIs should be enabled, false if MSIs 235 * should not be enabled. 236 */ 237 static bool radeon_msi_ok(struct radeon_device *rdev) 238 { 239 /* RV370/RV380 was first asic with MSI support */ 240 if (rdev->family < CHIP_RV380) 241 return false; 242 243 /* MSIs don't work on AGP */ 244 if (rdev->flags & RADEON_IS_AGP) 245 return false; 246 247 /* 248 * Older chips have a HW limitation, they can only generate 40 bits 249 * of address for "64-bit" MSIs which breaks on some platforms, notably 250 * IBM POWER servers, so we limit them 251 */ 252 if (rdev->family < CHIP_BONAIRE) { 253 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 254 rdev->pdev->no_64bit_msi = 1; 255 } 256 257 /* force MSI on */ 258 if (radeon_msi == 1) 259 return true; 260 else if (radeon_msi == 0) 261 return false; 262 263 /* Quirks */ 264 /* HP RS690 only seems to work with MSIs. */ 265 if ((rdev->pdev->device == 0x791f) && 266 (rdev->pdev->subsystem_vendor == 0x103c) && 267 (rdev->pdev->subsystem_device == 0x30c2)) 268 return true; 269 270 /* Dell RS690 only seems to work with MSIs. */ 271 if ((rdev->pdev->device == 0x791f) && 272 (rdev->pdev->subsystem_vendor == 0x1028) && 273 (rdev->pdev->subsystem_device == 0x01fc)) 274 return true; 275 276 /* Dell RS690 only seems to work with MSIs. */ 277 if ((rdev->pdev->device == 0x791f) && 278 (rdev->pdev->subsystem_vendor == 0x1028) && 279 (rdev->pdev->subsystem_device == 0x01fd)) 280 return true; 281 282 /* Gateway RS690 only seems to work with MSIs. */ 283 if ((rdev->pdev->device == 0x791f) && 284 (rdev->pdev->subsystem_vendor == 0x107b) && 285 (rdev->pdev->subsystem_device == 0x0185)) 286 return true; 287 288 /* try and enable MSIs by default on all RS690s */ 289 if (rdev->family == CHIP_RS690) 290 return true; 291 292 /* RV515 seems to have MSI issues where it loses 293 * MSI rearms occasionally. This leads to lockups and freezes. 294 * disable it by default. 295 */ 296 if (rdev->family == CHIP_RV515) 297 return false; 298 if (rdev->flags & RADEON_IS_IGP) { 299 /* APUs work fine with MSIs */ 300 if (rdev->family >= CHIP_PALM) 301 return true; 302 /* lots of IGPs have problems with MSIs */ 303 return false; 304 } 305 306 return true; 307 } 308 309 /** 310 * radeon_irq_kms_init - init driver interrupt info 311 * 312 * @rdev: radeon device pointer 313 * 314 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 315 * Returns 0 for success, error for failure. 316 */ 317 int radeon_irq_kms_init(struct radeon_device *rdev) 318 { 319 int r = 0; 320 321 spin_lock_init(&rdev->irq.lock); 322 323 /* Disable vblank irqs aggressively for power-saving */ 324 rdev->ddev->vblank_disable_immediate = true; 325 326 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 327 if (r) { 328 return r; 329 } 330 331 /* enable msi */ 332 rdev->msi_enabled = 0; 333 334 if (radeon_msi_ok(rdev)) { 335 int ret = pci_enable_msi(rdev->pdev); 336 if (!ret) { 337 rdev->msi_enabled = 1; 338 dev_info(rdev->dev, "radeon: using MSI.\n"); 339 } 340 } 341 342 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 343 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 344 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 345 346 rdev->irq.installed = true; 347 r = radeon_irq_install(rdev, rdev->pdev->irq); 348 if (r) { 349 rdev->irq.installed = false; 350 flush_delayed_work(&rdev->hotplug_work); 351 return r; 352 } 353 354 DRM_INFO("radeon: irq initialized.\n"); 355 return 0; 356 } 357 358 /** 359 * radeon_irq_kms_fini - tear down driver interrupt info 360 * 361 * @rdev: radeon device pointer 362 * 363 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 364 */ 365 void radeon_irq_kms_fini(struct radeon_device *rdev) 366 { 367 if (rdev->irq.installed) { 368 radeon_irq_uninstall(rdev); 369 rdev->irq.installed = false; 370 if (rdev->msi_enabled) 371 pci_disable_msi(rdev->pdev); 372 flush_delayed_work(&rdev->hotplug_work); 373 } 374 } 375 376 /** 377 * radeon_irq_kms_sw_irq_get - enable software interrupt 378 * 379 * @rdev: radeon device pointer 380 * @ring: ring whose interrupt you want to enable 381 * 382 * Enables the software interrupt for a specific ring (all asics). 383 * The software interrupt is generally used to signal a fence on 384 * a particular ring. 385 */ 386 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 387 { 388 unsigned long irqflags; 389 390 if (!rdev->irq.installed) 391 return; 392 393 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 394 spin_lock_irqsave(&rdev->irq.lock, irqflags); 395 radeon_irq_set(rdev); 396 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 397 } 398 } 399 400 /** 401 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 402 * 403 * @rdev: radeon device pointer 404 * @ring: ring whose interrupt you want to enable 405 * 406 * Enables the software interrupt for a specific ring (all asics). 407 * The software interrupt is generally used to signal a fence on 408 * a particular ring. 409 */ 410 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 411 { 412 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 413 } 414 415 /** 416 * radeon_irq_kms_sw_irq_put - disable software interrupt 417 * 418 * @rdev: radeon device pointer 419 * @ring: ring whose interrupt you want to disable 420 * 421 * Disables the software interrupt for a specific ring (all asics). 422 * The software interrupt is generally used to signal a fence on 423 * a particular ring. 424 */ 425 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 426 { 427 unsigned long irqflags; 428 429 if (!rdev->irq.installed) 430 return; 431 432 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 433 spin_lock_irqsave(&rdev->irq.lock, irqflags); 434 radeon_irq_set(rdev); 435 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 436 } 437 } 438 439 /** 440 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 441 * 442 * @rdev: radeon device pointer 443 * @crtc: crtc whose interrupt you want to enable 444 * 445 * Enables the pageflip interrupt for a specific crtc (all asics). 446 * For pageflips we use the vblank interrupt source. 447 */ 448 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 449 { 450 unsigned long irqflags; 451 452 if (crtc < 0 || crtc >= rdev->num_crtc) 453 return; 454 455 if (!rdev->irq.installed) 456 return; 457 458 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 459 spin_lock_irqsave(&rdev->irq.lock, irqflags); 460 radeon_irq_set(rdev); 461 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 462 } 463 } 464 465 /** 466 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 467 * 468 * @rdev: radeon device pointer 469 * @crtc: crtc whose interrupt you want to disable 470 * 471 * Disables the pageflip interrupt for a specific crtc (all asics). 472 * For pageflips we use the vblank interrupt source. 473 */ 474 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 475 { 476 unsigned long irqflags; 477 478 if (crtc < 0 || crtc >= rdev->num_crtc) 479 return; 480 481 if (!rdev->irq.installed) 482 return; 483 484 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 485 spin_lock_irqsave(&rdev->irq.lock, irqflags); 486 radeon_irq_set(rdev); 487 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 488 } 489 } 490 491 /** 492 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 493 * 494 * @rdev: radeon device pointer 495 * @block: afmt block whose interrupt you want to enable 496 * 497 * Enables the afmt change interrupt for a specific afmt block (all asics). 498 */ 499 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 500 { 501 unsigned long irqflags; 502 503 if (!rdev->irq.installed) 504 return; 505 506 spin_lock_irqsave(&rdev->irq.lock, irqflags); 507 rdev->irq.afmt[block] = true; 508 radeon_irq_set(rdev); 509 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 510 511 } 512 513 /** 514 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 515 * 516 * @rdev: radeon device pointer 517 * @block: afmt block whose interrupt you want to disable 518 * 519 * Disables the afmt change interrupt for a specific afmt block (all asics). 520 */ 521 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 522 { 523 unsigned long irqflags; 524 525 if (!rdev->irq.installed) 526 return; 527 528 spin_lock_irqsave(&rdev->irq.lock, irqflags); 529 rdev->irq.afmt[block] = false; 530 radeon_irq_set(rdev); 531 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 532 } 533 534 /** 535 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 536 * 537 * @rdev: radeon device pointer 538 * @hpd_mask: mask of hpd pins you want to enable. 539 * 540 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 541 */ 542 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 543 { 544 unsigned long irqflags; 545 int i; 546 547 if (!rdev->irq.installed) 548 return; 549 550 spin_lock_irqsave(&rdev->irq.lock, irqflags); 551 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 552 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 553 radeon_irq_set(rdev); 554 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 555 } 556 557 /** 558 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 559 * 560 * @rdev: radeon device pointer 561 * @hpd_mask: mask of hpd pins you want to disable. 562 * 563 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 564 */ 565 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 566 { 567 unsigned long irqflags; 568 int i; 569 570 if (!rdev->irq.installed) 571 return; 572 573 spin_lock_irqsave(&rdev->irq.lock, irqflags); 574 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 575 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 576 radeon_irq_set(rdev); 577 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 578 } 579 580 /** 581 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers 582 * 583 * @rdev: radeon device pointer 584 * @reg: the register to write to enable/disable interrupts 585 * @mask: the mask that enables the interrupts 586 * @enable: whether to enable or disable the interrupt register 587 * @name: the name of the interrupt register to print to the kernel log 588 * @n: the number of the interrupt register to print to the kernel log 589 * 590 * Helper for updating the enable state of interrupt registers. Checks whether 591 * or not the interrupt matches the enable state we want. If it doesn't, then 592 * we update it and print a debugging message to the kernel log indicating the 593 * new state of the interrupt register. 594 * 595 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 596 */ 597 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 598 u32 reg, u32 mask, 599 bool enable, const char *name, unsigned n) 600 { 601 u32 tmp = RREG32(reg); 602 603 /* Interrupt state didn't change */ 604 if (!!(tmp & mask) == enable) 605 return; 606 607 if (enable) { 608 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 609 WREG32(reg, tmp |= mask); 610 } else { 611 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 612 WREG32(reg, tmp & ~mask); 613 } 614 } 615