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 /** 91 * radeon_irq_reset_work_func - execute gpu reset 92 * 93 * @work: work struct 94 * 95 * Execute scheduled gpu reset (cayman+). 96 * This function is called when the irq handler 97 * thinks we need a gpu reset. 98 */ 99 static void radeon_irq_reset_work_func(struct work_struct *work) 100 { 101 struct radeon_device *rdev = container_of(work, struct radeon_device, 102 reset_work); 103 104 radeon_gpu_reset(rdev); 105 } 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 dev->max_vblank_count = 0x001fffff; 150 return 0; 151 } 152 153 /** 154 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 155 * 156 * @dev: drm dev pointer 157 * 158 * This function disables all interrupt sources on the GPU (all asics). 159 */ 160 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 161 { 162 struct radeon_device *rdev = dev->dev_private; 163 unsigned long irqflags; 164 unsigned i; 165 166 if (rdev == NULL) { 167 return; 168 } 169 spin_lock_irqsave(&rdev->irq.lock, irqflags); 170 /* Disable *all* interrupts */ 171 for (i = 0; i < RADEON_NUM_RINGS; i++) 172 atomic_set(&rdev->irq.ring_int[i], 0); 173 rdev->irq.dpm_thermal = false; 174 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 175 rdev->irq.hpd[i] = false; 176 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 177 rdev->irq.crtc_vblank_int[i] = false; 178 atomic_set(&rdev->irq.pflip[i], 0); 179 rdev->irq.afmt[i] = false; 180 } 181 radeon_irq_set(rdev); 182 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 183 } 184 185 /** 186 * radeon_msi_ok - asic specific msi checks 187 * 188 * @rdev: radeon device pointer 189 * 190 * Handles asic specific MSI checks to determine if 191 * MSIs should be enabled on a particular chip (all asics). 192 * Returns true if MSIs should be enabled, false if MSIs 193 * should not be enabled. 194 */ 195 static bool radeon_msi_ok(struct radeon_device *rdev) 196 { 197 /* RV370/RV380 was first asic with MSI support */ 198 if (rdev->family < CHIP_RV380) 199 return false; 200 201 /* MSIs don't work on AGP */ 202 if (rdev->flags & RADEON_IS_AGP) 203 return false; 204 205 /* force MSI on */ 206 if (radeon_msi == 1) 207 return true; 208 else if (radeon_msi == 0) 209 return false; 210 211 /* Quirks */ 212 /* HP RS690 only seems to work with MSIs. */ 213 if ((rdev->pdev->device == 0x791f) && 214 (rdev->pdev->subsystem_vendor == 0x103c) && 215 (rdev->pdev->subsystem_device == 0x30c2)) 216 return true; 217 218 /* Dell RS690 only seems to work with MSIs. */ 219 if ((rdev->pdev->device == 0x791f) && 220 (rdev->pdev->subsystem_vendor == 0x1028) && 221 (rdev->pdev->subsystem_device == 0x01fc)) 222 return true; 223 224 /* Dell RS690 only seems to work with MSIs. */ 225 if ((rdev->pdev->device == 0x791f) && 226 (rdev->pdev->subsystem_vendor == 0x1028) && 227 (rdev->pdev->subsystem_device == 0x01fd)) 228 return true; 229 230 /* Gateway RS690 only seems to work with MSIs. */ 231 if ((rdev->pdev->device == 0x791f) && 232 (rdev->pdev->subsystem_vendor == 0x107b) && 233 (rdev->pdev->subsystem_device == 0x0185)) 234 return true; 235 236 /* try and enable MSIs by default on all RS690s */ 237 if (rdev->family == CHIP_RS690) 238 return true; 239 240 /* RV515 seems to have MSI issues where it loses 241 * MSI rearms occasionally. This leads to lockups and freezes. 242 * disable it by default. 243 */ 244 if (rdev->family == CHIP_RV515) 245 return false; 246 if (rdev->flags & RADEON_IS_IGP) { 247 /* APUs work fine with MSIs */ 248 if (rdev->family >= CHIP_PALM) 249 return true; 250 /* lots of IGPs have problems with MSIs */ 251 return false; 252 } 253 254 return true; 255 } 256 257 /** 258 * radeon_irq_kms_init - init driver interrupt info 259 * 260 * @rdev: radeon device pointer 261 * 262 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 263 * Returns 0 for success, error for failure. 264 */ 265 int radeon_irq_kms_init(struct radeon_device *rdev) 266 { 267 int r = 0; 268 269 spin_lock_init(&rdev->irq.lock); 270 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 271 if (r) { 272 return r; 273 } 274 /* enable msi */ 275 rdev->msi_enabled = 0; 276 277 if (radeon_msi_ok(rdev)) { 278 int ret = pci_enable_msi(rdev->pdev); 279 if (!ret) { 280 rdev->msi_enabled = 1; 281 dev_info(rdev->dev, "radeon: using MSI.\n"); 282 } 283 } 284 285 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 286 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); 287 INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func); 288 289 rdev->irq.installed = true; 290 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 291 if (r) { 292 rdev->irq.installed = false; 293 flush_work(&rdev->hotplug_work); 294 return r; 295 } 296 297 DRM_INFO("radeon: irq initialized.\n"); 298 return 0; 299 } 300 301 /** 302 * radeon_irq_kms_fini - tear down driver interrupt info 303 * 304 * @rdev: radeon device pointer 305 * 306 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 307 */ 308 void radeon_irq_kms_fini(struct radeon_device *rdev) 309 { 310 drm_vblank_cleanup(rdev->ddev); 311 if (rdev->irq.installed) { 312 drm_irq_uninstall(rdev->ddev); 313 rdev->irq.installed = false; 314 if (rdev->msi_enabled) 315 pci_disable_msi(rdev->pdev); 316 flush_work(&rdev->hotplug_work); 317 } 318 } 319 320 /** 321 * radeon_irq_kms_sw_irq_get - enable software interrupt 322 * 323 * @rdev: radeon device pointer 324 * @ring: ring whose interrupt you want to enable 325 * 326 * Enables the software interrupt for a specific ring (all asics). 327 * The software interrupt is generally used to signal a fence on 328 * a particular ring. 329 */ 330 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 331 { 332 unsigned long irqflags; 333 334 if (!rdev->ddev->irq_enabled) 335 return; 336 337 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 338 spin_lock_irqsave(&rdev->irq.lock, irqflags); 339 radeon_irq_set(rdev); 340 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 341 } 342 } 343 344 /** 345 * radeon_irq_kms_sw_irq_put - disable software interrupt 346 * 347 * @rdev: radeon device pointer 348 * @ring: ring whose interrupt you want to disable 349 * 350 * Disables the software interrupt for a specific ring (all asics). 351 * The software interrupt is generally used to signal a fence on 352 * a particular ring. 353 */ 354 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 355 { 356 unsigned long irqflags; 357 358 if (!rdev->ddev->irq_enabled) 359 return; 360 361 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 362 spin_lock_irqsave(&rdev->irq.lock, irqflags); 363 radeon_irq_set(rdev); 364 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 365 } 366 } 367 368 /** 369 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 370 * 371 * @rdev: radeon device pointer 372 * @crtc: crtc whose interrupt you want to enable 373 * 374 * Enables the pageflip interrupt for a specific crtc (all asics). 375 * For pageflips we use the vblank interrupt source. 376 */ 377 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 378 { 379 unsigned long irqflags; 380 381 if (crtc < 0 || crtc >= rdev->num_crtc) 382 return; 383 384 if (!rdev->ddev->irq_enabled) 385 return; 386 387 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 388 spin_lock_irqsave(&rdev->irq.lock, irqflags); 389 radeon_irq_set(rdev); 390 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 391 } 392 } 393 394 /** 395 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 396 * 397 * @rdev: radeon device pointer 398 * @crtc: crtc whose interrupt you want to disable 399 * 400 * Disables the pageflip interrupt for a specific crtc (all asics). 401 * For pageflips we use the vblank interrupt source. 402 */ 403 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 404 { 405 unsigned long irqflags; 406 407 if (crtc < 0 || crtc >= rdev->num_crtc) 408 return; 409 410 if (!rdev->ddev->irq_enabled) 411 return; 412 413 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 414 spin_lock_irqsave(&rdev->irq.lock, irqflags); 415 radeon_irq_set(rdev); 416 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 417 } 418 } 419 420 /** 421 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 422 * 423 * @rdev: radeon device pointer 424 * @block: afmt block whose interrupt you want to enable 425 * 426 * Enables the afmt change interrupt for a specific afmt block (all asics). 427 */ 428 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 429 { 430 unsigned long irqflags; 431 432 if (!rdev->ddev->irq_enabled) 433 return; 434 435 spin_lock_irqsave(&rdev->irq.lock, irqflags); 436 rdev->irq.afmt[block] = true; 437 radeon_irq_set(rdev); 438 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 439 440 } 441 442 /** 443 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 444 * 445 * @rdev: radeon device pointer 446 * @block: afmt block whose interrupt you want to disable 447 * 448 * Disables the afmt change interrupt for a specific afmt block (all asics). 449 */ 450 void radeon_irq_kms_disable_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] = false; 459 radeon_irq_set(rdev); 460 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 461 } 462 463 /** 464 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 465 * 466 * @rdev: radeon device pointer 467 * @hpd_mask: mask of hpd pins you want to enable. 468 * 469 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 470 */ 471 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 472 { 473 unsigned long irqflags; 474 int i; 475 476 if (!rdev->ddev->irq_enabled) 477 return; 478 479 spin_lock_irqsave(&rdev->irq.lock, irqflags); 480 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 481 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 482 radeon_irq_set(rdev); 483 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 484 } 485 486 /** 487 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 488 * 489 * @rdev: radeon device pointer 490 * @hpd_mask: mask of hpd pins you want to disable. 491 * 492 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 493 */ 494 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 495 { 496 unsigned long irqflags; 497 int i; 498 499 if (!rdev->ddev->irq_enabled) 500 return; 501 502 spin_lock_irqsave(&rdev->irq.lock, irqflags); 503 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 504 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 505 radeon_irq_set(rdev); 506 spin_unlock_irqrestore(&rdev->irq.lock, irqflags); 507 } 508 509