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_irq.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 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 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 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 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 /** 198 * radeon_msi_ok - asic specific msi checks 199 * 200 * @rdev: radeon device pointer 201 * 202 * Handles asic specific MSI checks to determine if 203 * MSIs should be enabled on a particular chip (all asics). 204 * Returns true if MSIs should be enabled, false if MSIs 205 * should not be enabled. 206 */ 207 static bool radeon_msi_ok(struct radeon_device *rdev) 208 { 209 /* RV370/RV380 was first asic with MSI support */ 210 if (rdev->family < CHIP_RV380) 211 return false; 212 213 /* MSIs don't work on AGP */ 214 if (rdev->flags & RADEON_IS_AGP) 215 return false; 216 217 /* 218 * Older chips have a HW limitation, they can only generate 40 bits 219 * of address for "64-bit" MSIs which breaks on some platforms, notably 220 * IBM POWER servers, so we limit them 221 */ 222 if (rdev->family < CHIP_BONAIRE) { 223 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 224 rdev->pdev->no_64bit_msi = 1; 225 } 226 227 /* force MSI on */ 228 if (radeon_msi == 1) 229 return true; 230 else if (radeon_msi == 0) 231 return false; 232 233 /* Quirks */ 234 /* HP RS690 only seems to work with MSIs. */ 235 if ((rdev->pdev->device == 0x791f) && 236 (rdev->pdev->subsystem_vendor == 0x103c) && 237 (rdev->pdev->subsystem_device == 0x30c2)) 238 return true; 239 240 /* Dell RS690 only seems to work with MSIs. */ 241 if ((rdev->pdev->device == 0x791f) && 242 (rdev->pdev->subsystem_vendor == 0x1028) && 243 (rdev->pdev->subsystem_device == 0x01fc)) 244 return true; 245 246 /* Dell RS690 only seems to work with MSIs. */ 247 if ((rdev->pdev->device == 0x791f) && 248 (rdev->pdev->subsystem_vendor == 0x1028) && 249 (rdev->pdev->subsystem_device == 0x01fd)) 250 return true; 251 252 /* Gateway RS690 only seems to work with MSIs. */ 253 if ((rdev->pdev->device == 0x791f) && 254 (rdev->pdev->subsystem_vendor == 0x107b) && 255 (rdev->pdev->subsystem_device == 0x0185)) 256 return true; 257 258 /* try and enable MSIs by default on all RS690s */ 259 if (rdev->family == CHIP_RS690) 260 return true; 261 262 /* RV515 seems to have MSI issues where it loses 263 * MSI rearms occasionally. This leads to lockups and freezes. 264 * disable it by default. 265 */ 266 if (rdev->family == CHIP_RV515) 267 return false; 268 if (rdev->flags & RADEON_IS_IGP) { 269 /* APUs work fine with MSIs */ 270 if (rdev->family >= CHIP_PALM) 271 return true; 272 /* lots of IGPs have problems with MSIs */ 273 return false; 274 } 275 276 return true; 277 } 278 279 /** 280 * radeon_irq_kms_init - init driver interrupt info 281 * 282 * @rdev: radeon device pointer 283 * 284 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 285 * Returns 0 for success, error for failure. 286 */ 287 int radeon_irq_kms_init(struct radeon_device *rdev) 288 { 289 int r = 0; 290 291 spin_lock_init(&rdev->irq.lock); 292 293 /* Disable vblank irqs aggressively for power-saving */ 294 rdev->ddev->vblank_disable_immediate = true; 295 296 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 297 if (r) { 298 return r; 299 } 300 301 /* enable msi */ 302 rdev->msi_enabled = 0; 303 304 if (radeon_msi_ok(rdev)) { 305 int ret = pci_enable_msi(rdev->pdev); 306 if (!ret) { 307 rdev->msi_enabled = 1; 308 dev_info(rdev->dev, "radeon: using MSI.\n"); 309 } 310 } 311 312 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 313 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 314 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 315 316 rdev->irq.installed = true; 317 r = drm_irq_install(rdev->ddev, rdev->pdev->irq); 318 if (r) { 319 rdev->irq.installed = false; 320 flush_delayed_work(&rdev->hotplug_work); 321 return r; 322 } 323 324 DRM_INFO("radeon: irq initialized.\n"); 325 return 0; 326 } 327 328 /** 329 * radeon_irq_kms_fini - tear down driver interrupt info 330 * 331 * @rdev: radeon device pointer 332 * 333 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 334 */ 335 void radeon_irq_kms_fini(struct radeon_device *rdev) 336 { 337 if (rdev->irq.installed) { 338 drm_irq_uninstall(rdev->ddev); 339 rdev->irq.installed = false; 340 if (rdev->msi_enabled) 341 pci_disable_msi(rdev->pdev); 342 flush_delayed_work(&rdev->hotplug_work); 343 } 344 } 345 346 /** 347 * radeon_irq_kms_sw_irq_get - enable software interrupt 348 * 349 * @rdev: radeon device pointer 350 * @ring: ring whose interrupt you want to enable 351 * 352 * Enables the software interrupt for a specific ring (all asics). 353 * The software interrupt is generally used to signal a fence on 354 * a particular ring. 355 */ 356 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 357 { 358 unsigned long irqflags; 359 360 if (!rdev->ddev->irq_enabled) 361 return; 362 363 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 364 spin_lock_irqsave(&rdev->irq.lock, irqflags); 365 radeon_irq_set(rdev); 366 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 367 } 368 } 369 370 /** 371 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 372 * 373 * @rdev: radeon device pointer 374 * @ring: ring whose interrupt you want to enable 375 * 376 * Enables the software interrupt for a specific ring (all asics). 377 * The software interrupt is generally used to signal a fence on 378 * a particular ring. 379 */ 380 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 381 { 382 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 383 } 384 385 /** 386 * radeon_irq_kms_sw_irq_put - disable software interrupt 387 * 388 * @rdev: radeon device pointer 389 * @ring: ring whose interrupt you want to disable 390 * 391 * Disables the software interrupt for a specific ring (all asics). 392 * The software interrupt is generally used to signal a fence on 393 * a particular ring. 394 */ 395 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 396 { 397 unsigned long irqflags; 398 399 if (!rdev->ddev->irq_enabled) 400 return; 401 402 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 403 spin_lock_irqsave(&rdev->irq.lock, irqflags); 404 radeon_irq_set(rdev); 405 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 406 } 407 } 408 409 /** 410 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 411 * 412 * @rdev: radeon device pointer 413 * @crtc: crtc whose interrupt you want to enable 414 * 415 * Enables the pageflip interrupt for a specific crtc (all asics). 416 * For pageflips we use the vblank interrupt source. 417 */ 418 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 419 { 420 unsigned long irqflags; 421 422 if (crtc < 0 || crtc >= rdev->num_crtc) 423 return; 424 425 if (!rdev->ddev->irq_enabled) 426 return; 427 428 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 429 spin_lock_irqsave(&rdev->irq.lock, irqflags); 430 radeon_irq_set(rdev); 431 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 432 } 433 } 434 435 /** 436 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 437 * 438 * @rdev: radeon device pointer 439 * @crtc: crtc whose interrupt you want to disable 440 * 441 * Disables the pageflip interrupt for a specific crtc (all asics). 442 * For pageflips we use the vblank interrupt source. 443 */ 444 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 445 { 446 unsigned long irqflags; 447 448 if (crtc < 0 || crtc >= rdev->num_crtc) 449 return; 450 451 if (!rdev->ddev->irq_enabled) 452 return; 453 454 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 455 spin_lock_irqsave(&rdev->irq.lock, irqflags); 456 radeon_irq_set(rdev); 457 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 458 } 459 } 460 461 /** 462 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 463 * 464 * @rdev: radeon device pointer 465 * @block: afmt block whose interrupt you want to enable 466 * 467 * Enables the afmt change interrupt for a specific afmt block (all asics). 468 */ 469 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 470 { 471 unsigned long irqflags; 472 473 if (!rdev->ddev->irq_enabled) 474 return; 475 476 spin_lock_irqsave(&rdev->irq.lock, irqflags); 477 rdev->irq.afmt[block] = true; 478 radeon_irq_set(rdev); 479 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 480 481 } 482 483 /** 484 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 485 * 486 * @rdev: radeon device pointer 487 * @block: afmt block whose interrupt you want to disable 488 * 489 * Disables the afmt change interrupt for a specific afmt block (all asics). 490 */ 491 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 492 { 493 unsigned long irqflags; 494 495 if (!rdev->ddev->irq_enabled) 496 return; 497 498 spin_lock_irqsave(&rdev->irq.lock, irqflags); 499 rdev->irq.afmt[block] = false; 500 radeon_irq_set(rdev); 501 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 502 } 503 504 /** 505 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 506 * 507 * @rdev: radeon device pointer 508 * @hpd_mask: mask of hpd pins you want to enable. 509 * 510 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 511 */ 512 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 513 { 514 unsigned long irqflags; 515 int i; 516 517 if (!rdev->ddev->irq_enabled) 518 return; 519 520 spin_lock_irqsave(&rdev->irq.lock, irqflags); 521 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 522 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 523 radeon_irq_set(rdev); 524 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 525 } 526 527 /** 528 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 529 * 530 * @rdev: radeon device pointer 531 * @hpd_mask: mask of hpd pins you want to disable. 532 * 533 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 534 */ 535 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 536 { 537 unsigned long irqflags; 538 int i; 539 540 if (!rdev->ddev->irq_enabled) 541 return; 542 543 spin_lock_irqsave(&rdev->irq.lock, irqflags); 544 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 545 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 546 radeon_irq_set(rdev); 547 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 548 } 549 550 /** 551 * radeon_irq_kms_set_irq_n_enabled - helper for updating interrupt enable registers 552 * 553 * @rdev: radeon device pointer 554 * @reg: the register to write to enable/disable interrupts 555 * @mask: the mask that enables the interrupts 556 * @enable: whether to enable or disable the interrupt register 557 * @name: the name of the interrupt register to print to the kernel log 558 * @n: the number of the interrupt register to print to the kernel log 559 * 560 * Helper for updating the enable state of interrupt registers. Checks whether 561 * or not the interrupt matches the enable state we want. If it doesn't, then 562 * we update it and print a debugging message to the kernel log indicating the 563 * new state of the interrupt register. 564 * 565 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 566 */ 567 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 568 u32 reg, u32 mask, 569 bool enable, const char *name, unsigned n) 570 { 571 u32 tmp = RREG32(reg); 572 573 /* Interrupt state didn't change */ 574 if (!!(tmp & mask) == enable) 575 return; 576 577 if (enable) { 578 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 579 WREG32(reg, tmp |= mask); 580 } else { 581 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 582 WREG32(reg, tmp & ~mask); 583 } 584 } 585