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 <uapi_drm/radeon_drm.h> 31 #include "radeon_reg.h" 32 #include "radeon_irq_kms.h" 33 #include "radeon.h" 34 #include "atom.h" 35 36 #ifdef PM_TODO 37 #include <linux/pm_runtime.h> 38 #endif 39 40 #define RADEON_WAIT_IDLE_TIMEOUT 200 41 42 /** 43 * radeon_driver_irq_handler_kms - irq handler for KMS 44 * 45 * @void *arg: args 46 * 47 * This is the irq handler for the radeon KMS driver (all asics). 48 * radeon_irq_process is a macro that points to the per-asic 49 * irq handler callback. 50 */ 51 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) 52 { 53 struct drm_device *dev = (struct drm_device *) arg; 54 struct radeon_device *rdev = dev->dev_private; 55 irqreturn_t ret; 56 57 ret = radeon_irq_process(rdev); 58 #ifdef PM_TODO 59 if (ret == IRQ_HANDLED) 60 pm_runtime_mark_last_busy(dev->dev); 61 #endif 62 return ret; 63 } 64 65 /* 66 * Handle hotplug events outside the interrupt handler proper. 67 */ 68 /** 69 * radeon_hotplug_work_func - display hotplug work handler 70 * 71 * @work: work struct 72 * 73 * This is the hot plug event work handler (all asics). 74 * The work gets scheduled from the irq handler if there 75 * was a hot plug interrupt. It walks the connector table 76 * and calls the hotplug handler for each one, then sends 77 * a drm hotplug event to alert userspace. 78 */ 79 static void radeon_hotplug_work_func(void *arg, int pending) 80 { 81 struct radeon_device *rdev = arg; 82 struct drm_device *dev = rdev->ddev; 83 struct drm_mode_config *mode_config = &dev->mode_config; 84 struct drm_connector *connector; 85 86 if (mode_config->num_connector) { 87 list_for_each_entry(connector, &mode_config->connector_list, head) 88 radeon_connector_hotplug(connector); 89 } 90 /* Just fire off a uevent and let userspace tell us what to do */ 91 drm_helper_hpd_irq_event(dev); 92 } 93 94 /** 95 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback 96 * 97 * @dev: drm dev pointer 98 * 99 * Gets the hw ready to enable irqs (all asics). 100 * This function disables all interrupt sources on the GPU. 101 */ 102 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 103 { 104 struct radeon_device *rdev = dev->dev_private; 105 unsigned i; 106 107 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 108 /* Disable *all* interrupts */ 109 for (i = 0; i < RADEON_NUM_RINGS; i++) 110 atomic_set(&rdev->irq.ring_int[i], 0); 111 rdev->irq.dpm_thermal = false; 112 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 113 rdev->irq.hpd[i] = false; 114 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 115 rdev->irq.crtc_vblank_int[i] = false; 116 atomic_set(&rdev->irq.pflip[i], 0); 117 rdev->irq.afmt[i] = false; 118 } 119 radeon_irq_set(rdev); 120 lockmgr(&rdev->irq.lock, LK_RELEASE); 121 /* Clear bits */ 122 radeon_irq_process(rdev); 123 } 124 125 /** 126 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback 127 * 128 * @dev: drm dev pointer 129 * 130 * Handles stuff to be done after enabling irqs (all asics). 131 * Returns 0 on success. 132 */ 133 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 134 { 135 dev->max_vblank_count = 0x001fffff; 136 return 0; 137 } 138 139 /** 140 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback 141 * 142 * @dev: drm dev pointer 143 * 144 * This function disables all interrupt sources on the GPU (all asics). 145 */ 146 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 147 { 148 struct radeon_device *rdev = dev->dev_private; 149 unsigned i; 150 151 if (rdev == NULL) { 152 return; 153 } 154 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 155 /* Disable *all* interrupts */ 156 for (i = 0; i < RADEON_NUM_RINGS; i++) 157 atomic_set(&rdev->irq.ring_int[i], 0); 158 rdev->irq.dpm_thermal = false; 159 for (i = 0; i < RADEON_MAX_HPD_PINS; i++) 160 rdev->irq.hpd[i] = false; 161 for (i = 0; i < RADEON_MAX_CRTCS; i++) { 162 rdev->irq.crtc_vblank_int[i] = false; 163 atomic_set(&rdev->irq.pflip[i], 0); 164 rdev->irq.afmt[i] = false; 165 } 166 radeon_irq_set(rdev); 167 lockmgr(&rdev->irq.lock, LK_RELEASE); 168 } 169 170 /** 171 * radeon_msi_ok - asic specific msi checks 172 * 173 * @rdev: radeon device pointer 174 * 175 * Handles asic specific MSI checks to determine if 176 * MSIs should be enabled on a particular chip (all asics). 177 * Returns true if MSIs should be enabled, false if MSIs 178 * should not be enabled. 179 */ 180 int radeon_msi_ok(struct drm_device *rdev, unsigned long flags) 181 { 182 int family; 183 184 family = flags & RADEON_FAMILY_MASK; 185 186 /* RV370/RV380 was first asic with MSI support */ 187 if (family < CHIP_RV380) 188 return false; 189 190 /* MSIs don't work on AGP */ 191 if (drm_pci_device_is_agp(rdev)) 192 return false; 193 194 /* force MSI on */ 195 if (radeon_msi == 1) 196 return true; 197 else if (radeon_msi == 0) 198 return false; 199 200 /* Quirks */ 201 /* HP RS690 only seems to work with MSIs. */ 202 if ((rdev->pdev->device == 0x791f) && 203 (rdev->pdev->subsystem_vendor == 0x103c) && 204 (rdev->pdev->subsystem_device == 0x30c2)) 205 return true; 206 207 /* Dell RS690 only seems to work with MSIs. */ 208 if ((rdev->pdev->device == 0x791f) && 209 (rdev->pdev->subsystem_vendor == 0x1028) && 210 (rdev->pdev->subsystem_device == 0x01fc)) 211 return true; 212 213 /* Dell RS690 only seems to work with MSIs. */ 214 if ((rdev->pdev->device == 0x791f) && 215 (rdev->pdev->subsystem_vendor == 0x1028) && 216 (rdev->pdev->subsystem_device == 0x01fd)) 217 return true; 218 219 /* Gateway RS690 only seems to work with MSIs. */ 220 if ((rdev->pdev->device == 0x791f) && 221 (rdev->pdev->subsystem_vendor == 0x107b) && 222 (rdev->pdev->subsystem_device == 0x0185)) 223 return true; 224 225 /* try and enable MSIs by default on all RS690s */ 226 if (family == CHIP_RS690) 227 return true; 228 229 /* RV515 seems to have MSI issues where it loses 230 * MSI rearms occasionally. This leads to lockups and freezes. 231 * disable it by default. 232 */ 233 if (family == CHIP_RV515) 234 return false; 235 if (flags & RADEON_IS_IGP) { 236 /* APUs work fine with MSIs */ 237 if (family >= CHIP_PALM) 238 return true; 239 /* lots of IGPs have problems with MSIs */ 240 return false; 241 } 242 243 return true; 244 } 245 246 /** 247 * radeon_irq_kms_init - init driver interrupt info 248 * 249 * @rdev: radeon device pointer 250 * 251 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics). 252 * Returns 0 for success, error for failure. 253 */ 254 int radeon_irq_kms_init(struct radeon_device *rdev) 255 { 256 int r = 0; 257 258 lockinit(&rdev->irq.lock, "drm__radeon_device__irq__lock", 0, LK_CANRECURSE); 259 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 260 if (r) { 261 return r; 262 } 263 264 /* enable msi */ 265 rdev->msi_enabled = (rdev->ddev->pdev->_irq_type == PCI_INTR_TYPE_MSI); 266 267 #ifndef __DragonFly__ 268 if (radeon_msi_ok(rdev)) { 269 int ret = pci_enable_msi(rdev->pdev); 270 if (!ret) { 271 rdev->msi_enabled = 1; 272 dev_info(rdev->dev, "radeon: using MSI.\n"); 273 } 274 } 275 #endif 276 277 TASK_INIT(&rdev->hotplug_work, 0, radeon_hotplug_work_func, rdev); 278 #if 0 279 INIT_WORK(&rdev->dp_work, radeon_dp_work_func); 280 #endif 281 TASK_INIT(&rdev->audio_work, 0, r600_audio_update_hdmi, rdev); 282 283 rdev->irq.installed = true; 284 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq); 285 if (r) { 286 rdev->irq.installed = false; 287 taskqueue_drain(rdev->tq, &rdev->hotplug_work); 288 return r; 289 } 290 291 DRM_INFO("radeon: irq initialized.\n"); 292 return 0; 293 } 294 295 /** 296 * radeon_irq_kms_fini - tear down driver interrupt info 297 * 298 * @rdev: radeon device pointer 299 * 300 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics). 301 */ 302 void radeon_irq_kms_fini(struct radeon_device *rdev) 303 { 304 drm_vblank_cleanup(rdev->ddev); 305 if (rdev->irq.installed) { 306 drm_irq_uninstall(rdev->ddev); 307 rdev->irq.installed = false; 308 taskqueue_drain(rdev->tq, &rdev->hotplug_work); 309 } 310 } 311 312 /** 313 * radeon_irq_kms_sw_irq_get - enable software interrupt 314 * 315 * @rdev: radeon device pointer 316 * @ring: ring whose interrupt you want to enable 317 * 318 * Enables the software interrupt for a specific ring (all asics). 319 * The software interrupt is generally used to signal a fence on 320 * a particular ring. 321 */ 322 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring) 323 { 324 if (!rdev->ddev->irq_enabled) 325 return; 326 327 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) { 328 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 329 radeon_irq_set(rdev); 330 lockmgr(&rdev->irq.lock, LK_RELEASE); 331 } 332 } 333 334 /** 335 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt 336 * 337 * @rdev: radeon device pointer 338 * @ring: ring whose interrupt you want to enable 339 * 340 * Enables the software interrupt for a specific ring (all asics). 341 * The software interrupt is generally used to signal a fence on 342 * a particular ring. 343 */ 344 #ifdef TODO_954605c 345 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring) 346 { 347 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1; 348 } 349 #endif 350 351 /** 352 * radeon_irq_kms_sw_irq_put - disable software interrupt 353 * 354 * @rdev: radeon device pointer 355 * @ring: ring whose interrupt you want to disable 356 * 357 * Disables 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 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring) 362 { 363 if (!rdev->ddev->irq_enabled) 364 return; 365 366 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) { 367 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 368 radeon_irq_set(rdev); 369 lockmgr(&rdev->irq.lock, LK_RELEASE); 370 } 371 } 372 373 /** 374 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt 375 * 376 * @rdev: radeon device pointer 377 * @crtc: crtc whose interrupt you want to enable 378 * 379 * Enables the pageflip interrupt for a specific crtc (all asics). 380 * For pageflips we use the vblank interrupt source. 381 */ 382 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc) 383 { 384 if (crtc < 0 || crtc >= rdev->num_crtc) 385 return; 386 387 if (!rdev->ddev->irq_enabled) 388 return; 389 390 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) { 391 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 392 radeon_irq_set(rdev); 393 lockmgr(&rdev->irq.lock, LK_RELEASE); 394 } 395 } 396 397 /** 398 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt 399 * 400 * @rdev: radeon device pointer 401 * @crtc: crtc whose interrupt you want to disable 402 * 403 * Disables the pageflip interrupt for a specific crtc (all asics). 404 * For pageflips we use the vblank interrupt source. 405 */ 406 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc) 407 { 408 if (crtc < 0 || crtc >= rdev->num_crtc) 409 return; 410 411 if (!rdev->ddev->irq_enabled) 412 return; 413 414 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) { 415 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 416 radeon_irq_set(rdev); 417 lockmgr(&rdev->irq.lock, LK_RELEASE); 418 } 419 } 420 421 /** 422 * radeon_irq_kms_enable_afmt - enable audio format change interrupt 423 * 424 * @rdev: radeon device pointer 425 * @block: afmt block whose interrupt you want to enable 426 * 427 * Enables the afmt change interrupt for a specific afmt block (all asics). 428 */ 429 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block) 430 { 431 if (!rdev->ddev->irq_enabled) 432 return; 433 434 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 435 rdev->irq.afmt[block] = true; 436 radeon_irq_set(rdev); 437 lockmgr(&rdev->irq.lock, LK_RELEASE); 438 } 439 440 /** 441 * radeon_irq_kms_disable_afmt - disable audio format change interrupt 442 * 443 * @rdev: radeon device pointer 444 * @block: afmt block whose interrupt you want to disable 445 * 446 * Disables the afmt change interrupt for a specific afmt block (all asics). 447 */ 448 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block) 449 { 450 if (!rdev->ddev->irq_enabled) 451 return; 452 453 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 454 rdev->irq.afmt[block] = false; 455 radeon_irq_set(rdev); 456 lockmgr(&rdev->irq.lock, LK_RELEASE); 457 } 458 459 /** 460 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt 461 * 462 * @rdev: radeon device pointer 463 * @hpd_mask: mask of hpd pins you want to enable. 464 * 465 * Enables the hotplug detect interrupt for a specific hpd pin (all asics). 466 */ 467 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 468 { 469 int i; 470 471 if (!rdev->ddev->irq_enabled) 472 return; 473 474 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 475 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 476 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i)); 477 radeon_irq_set(rdev); 478 lockmgr(&rdev->irq.lock, LK_RELEASE); 479 } 480 481 /** 482 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt 483 * 484 * @rdev: radeon device pointer 485 * @hpd_mask: mask of hpd pins you want to disable. 486 * 487 * Disables the hotplug detect interrupt for a specific hpd pin (all asics). 488 */ 489 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask) 490 { 491 int i; 492 493 if (!rdev->ddev->irq_enabled) 494 return; 495 496 lockmgr(&rdev->irq.lock, LK_EXCLUSIVE); 497 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i) 498 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i)); 499 radeon_irq_set(rdev); 500 lockmgr(&rdev->irq.lock, LK_RELEASE); 501 } 502 503