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