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.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 list_for_each_entry(connector, &mode_config->connector_list, head) 89 radeon_connector_hotplug(connector); 90 mutex_unlock(&mode_config->mutex); 91 /* Just fire off a uevent and let userspace tell us what to do */ 92 drm_helper_hpd_irq_event(dev); 93 } 94 95 static void radeon_dp_work_func(struct work_struct *work) 96 { 97 struct radeon_device *rdev = container_of(work, struct radeon_device, 98 dp_work); 99 struct drm_device *dev = rdev->ddev; 100 struct drm_mode_config *mode_config = &dev->mode_config; 101 struct drm_connector *connector; 102 103 /* this should take a mutex */ 104 list_for_each_entry(connector, &mode_config->connector_list, head) 105 radeon_connector_hotplug(connector); 106 } 107 /** 108 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 109 * 110 * @dev: drm dev pointer 111 * 112 * Gets the hw ready to enable irqs (all asics). 113 * This function disables all interrupt sources on the GPU. 114 */ 115 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 116 { 117 struct radeon_device *rdev = dev->dev_private; 118 unsigned long irqflags; 119 unsigned i; 120 121 spin_lock_irqsave(&rdev->irq.lock, irqflags); 122 /* Disable *all* interrupts */ 123 for (i = 0; i < RADEON_NUM_RINGS; i++) 124 atomic_set(&rdev->irq.ring_int[i], 0); 125 rdev->irq.dpm_thermal = false; 126 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 127 rdev->irq.hpd[i] = false; 128 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 129 rdev->irq.crtc_vblank_int[i] = false; 130 atomic_set(&rdev->irq.pflip[i], 0); 131 rdev->irq.afmt[i] = false; 132 } 133 radeon_irq_set(rdev); 134 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 135 /* Clear bits */ 136 radeon_irq_process(rdev); 137 } 138 139 /** 140 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 141 * 142 * @dev: drm dev pointer 143 * 144 * Handles stuff to be done after enabling irqs (all asics). 145 * Returns 0 on success. 146 */ 147 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 148 { 149 struct radeon_device *rdev = dev->dev_private; 150 151 if (ASIC_IS_AVIVO(rdev)) 152 dev->max_vblank_count = 0x00ffffff; 153 else 154 dev->max_vblank_count = 0x001fffff; 155 156 return 0; 157 } 158 159 /** 160 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 161 * 162 * @dev: drm dev pointer 163 * 164 * This function disables all interrupt sources on the GPU (all asics). 165 */ 166 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 167 { 168 struct radeon_device *rdev = dev->dev_private; 169 unsigned long irqflags; 170 unsigned i; 171 172 if (rdev == NULL) { 173 return; 174 } 175 spin_lock_irqsave(&rdev->irq.lock, irqflags); 176 /* Disable *all* interrupts */ 177 for (i = 0; i < RADEON_NUM_RINGS; i++) 178 atomic_set(&rdev->irq.ring_int[i], 0); 179 rdev->irq.dpm_thermal = false; 180 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 181 rdev->irq.hpd[i] = false; 182 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 183 rdev->irq.crtc_vblank_int[i] = false; 184 atomic_set(&rdev->irq.pflip[i], 0); 185 rdev->irq.afmt[i] = false; 186 } 187 radeon_irq_set(rdev); 188 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 189 } 190 191 /** 192 * radeon_msi_ok - asic specific msi checks 193 * 194 * @rdev: radeon device pointer 195 * 196 * Handles asic specific MSI checks to determine if 197 * MSIs should be enabled on a particular chip (all asics). 198 * Returns true if MSIs should be enabled, false if MSIs 199 * should not be enabled. 200 */ 201 static bool radeon_msi_ok(struct radeon_device *rdev) 202 { 203 /* RV370/RV380 was first asic with MSI support */ 204 if (rdev->family < CHIP_RV380) 205 return false; 206 207 /* MSIs don't work on AGP */ 208 if (rdev->flags & RADEON_IS_AGP) 209 return false; 210 211 /* 212 * Older chips have a HW limitation, they can only generate 40 bits 213 * of address for "64-bit" MSIs which breaks on some platforms, notably 214 * IBM POWER servers, so we limit them 215 */ 216 if (rdev->family < CHIP_BONAIRE) { 217 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n"); 218 rdev->pdev->no_64bit_msi = 1; 219 } 220 221 /* force MSI on */ 222 if (radeon_msi == 1) 223 return true; 224 else if (radeon_msi == 0) 225 return false; 226 227 /* Quirks */ 228 /* HP RS690 only seems to work with MSIs. */ 229 if ((rdev->pdev->device == 0x791f) && 230 (rdev->pdev->subsystem_vendor == 0x103c) && 231 (rdev->pdev->subsystem_device == 0x30c2)) 232 return true; 233 234 /* Dell RS690 only seems to work with MSIs. */ 235 if ((rdev->pdev->device == 0x791f) && 236 (rdev->pdev->subsystem_vendor == 0x1028) && 237 (rdev->pdev->subsystem_device == 0x01fc)) 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 == 0x01fd)) 244 return true; 245 246 /* Gateway RS690 only seems to work with MSIs. */ 247 if ((rdev->pdev->device == 0x791f) && 248 (rdev->pdev->subsystem_vendor == 0x107b) && 249 (rdev->pdev->subsystem_device == 0x0185)) 250 return true; 251 252 /* try and enable MSIs by default on all RS690s */ 253 if (rdev->family == CHIP_RS690) 254 return true; 255 256 /* RV515 seems to have MSI issues where it loses 257 * MSI rearms occasionally. This leads to lockups and freezes. 258 * disable it by default. 259 */ 260 if (rdev->family == CHIP_RV515) 261 return false; 262 if (rdev->flags & RADEON_IS_IGP) { 263 /* APUs work fine with MSIs */ 264 if (rdev->family >= CHIP_PALM) 265 return true; 266 /* lots of IGPs have problems with MSIs */ 267 return false; 268 } 269 270 return true; 271 } 272 273 /** 274 * radeon_irq_kms_init - init driver interrupt info 275 * 276 * @rdev: radeon device pointer 277 * 278 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 279 * Returns 0 for success, error for failure. 280 */ 281 int radeon_irq_kms_init(struct radeon_device *rdev) 282 { 283 int r = 0; 284 285 spin_lock_init(&rdev->irq.lock); 286 287 /* Disable vblank irqs aggressively for power-saving */ 288 rdev->ddev->vblank_disable_immediate = true; 289 290 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 291 if (r) { 292 return r; 293 } 294 295 /* enable msi */ 296 rdev->msi_enabled = 0; 297 298 if (radeon_msi_ok(rdev)) { 299 int ret = pci_enable_msi(rdev->pdev); 300 if (!ret) { 301 rdev->msi_enabled = 1; 302 dev_info(rdev->dev, "radeon: using MSI.\n"); 303 } 304 } 305 306 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 307 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 308 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 309 310 rdev->irq.installed = true; 311 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 312 if (r) { 313 rdev->irq.installed = false; 314 flush_delayed_work(&rdev->hotplug_work); 315 return r; 316 } 317 318 DRM_INFO("radeon: irq initialized.\n"); 319 return 0; 320 } 321 322 /** 323 * radeon_irq_kms_fini - tear down driver interrupt info 324 * 325 * @rdev: radeon device pointer 326 * 327 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 328 */ 329 void radeon_irq_kms_fini(struct radeon_device *rdev) 330 { 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_delayed_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 /** 545 * radeon_irq_kms_update_int_n - helper for updating interrupt enable registers 546 * 547 * @rdev: radeon device pointer 548 * @reg: the register to write to enable/disable interrupts 549 * @mask: the mask that enables the interrupts 550 * @enable: whether to enable or disable the interrupt register 551 * @name: the name of the interrupt register to print to the kernel log 552 * @num: the number of the interrupt register to print to the kernel log 553 * 554 * Helper for updating the enable state of interrupt registers. Checks whether 555 * or not the interrupt matches the enable state we want. If it doesn't, then 556 * we update it and print a debugging message to the kernel log indicating the 557 * new state of the interrupt register. 558 * 559 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc. 560 */ 561 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev, 562 u32 reg, u32 mask, 563 bool enable, const char *name, unsigned n) 564 { 565 u32 tmp = RREG32(reg); 566 567 /* Interrupt state didn't change */ 568 if (!!(tmp & mask) == enable) 569 return; 570 571 if (enable) { 572 DRM_DEBUG("%s%d interrupts enabled\n", name, n); 573 WREG32(reg, tmp |= mask); 574 } else { 575 DRM_DEBUG("%s%d interrupts disabled\n", name, n); 576 WREG32(reg, tmp & ~mask); 577 } 578 } 579