drivers/gpu/drm/radeon/radeon_irq_kms.c

   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         r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
 287         if (r) {
 288                 return r;
 289         }
 290
 291         /* enable msi */
 292         rdev->msi_enabled = 0;
 293
 294         if (radeon_msi_ok(rdev)) {
 295                 int ret = pci_enable_msi(rdev->pdev);
 296                 if (!ret) {
 297                         rdev->msi_enabled = 1;
 298                         dev_info(rdev->dev, "radeon: using MSI.\n");
 299                 }
 300         }
 301
 302         INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
 303         INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
 304         INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
 305
 306         rdev->irq.installed = true;
 307         r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
 308         if (r) {
 309                 rdev->irq.installed = false;
 310                 flush_delayed_work(&rdev->hotplug_work);
 311                 return r;
 312         }
 313
 314         DRM_INFO("radeon: irq initialized.\n");
 315         return 0;
 316 }
 317
 318 /**
 319  * radeon_irq_kms_fini - tear down driver interrupt info
 320  *
 321  * @rdev: radeon device pointer
 322  *
 323  * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
 324  */
 325 void radeon_irq_kms_fini(struct radeon_device *rdev)
 326 {
 327         drm_vblank_cleanup(rdev->ddev);
 328         if (rdev->irq.installed) {
 329                 drm_irq_uninstall(rdev->ddev);
 330                 rdev->irq.installed = false;
 331                 if (rdev->msi_enabled)
 332                         pci_disable_msi(rdev->pdev);
 333                 flush_delayed_work(&rdev->hotplug_work);
 334         }
 335 }
 336
 337 /**
 338  * radeon_irq_kms_sw_irq_get - enable software interrupt
 339  *
 340  * @rdev: radeon device pointer
 341  * @ring: ring whose interrupt you want to enable
 342  *
 343  * Enables the software interrupt for a specific ring (all asics).
 344  * The software interrupt is generally used to signal a fence on
 345  * a particular ring.
 346  */
 347 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
 348 {
 349         unsigned long irqflags;
 350
 351         if (!rdev->ddev->irq_enabled)
 352                 return;
 353
 354         if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
 355                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 356                 radeon_irq_set(rdev);
 357                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 358         }
 359 }
 360
 361 /**
 362  * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
 363  *
 364  * @rdev: radeon device pointer
 365  * @ring: ring whose interrupt you want to enable
 366  *
 367  * Enables the software interrupt for a specific ring (all asics).
 368  * The software interrupt is generally used to signal a fence on
 369  * a particular ring.
 370  */
 371 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
 372 {
 373         return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
 374 }
 375
 376 /**
 377  * radeon_irq_kms_sw_irq_put - disable software interrupt
 378  *
 379  * @rdev: radeon device pointer
 380  * @ring: ring whose interrupt you want to disable
 381  *
 382  * Disables the software interrupt for a specific ring (all asics).
 383  * The software interrupt is generally used to signal a fence on
 384  * a particular ring.
 385  */
 386 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
 387 {
 388         unsigned long irqflags;
 389
 390         if (!rdev->ddev->irq_enabled)
 391                 return;
 392
 393         if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
 394                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 395                 radeon_irq_set(rdev);
 396                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 397         }
 398 }
 399
 400 /**
 401  * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
 402  *
 403  * @rdev: radeon device pointer
 404  * @crtc: crtc whose interrupt you want to enable
 405  *
 406  * Enables the pageflip interrupt for a specific crtc (all asics).
 407  * For pageflips we use the vblank interrupt source.
 408  */
 409 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
 410 {
 411         unsigned long irqflags;
 412
 413         if (crtc < 0 || crtc >= rdev->num_crtc)
 414                 return;
 415
 416         if (!rdev->ddev->irq_enabled)
 417                 return;
 418
 419         if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
 420                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 421                 radeon_irq_set(rdev);
 422                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 423         }
 424 }
 425
 426 /**
 427  * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
 428  *
 429  * @rdev: radeon device pointer
 430  * @crtc: crtc whose interrupt you want to disable
 431  *
 432  * Disables the pageflip interrupt for a specific crtc (all asics).
 433  * For pageflips we use the vblank interrupt source.
 434  */
 435 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
 436 {
 437         unsigned long irqflags;
 438
 439         if (crtc < 0 || crtc >= rdev->num_crtc)
 440                 return;
 441
 442         if (!rdev->ddev->irq_enabled)
 443                 return;
 444
 445         if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
 446                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 447                 radeon_irq_set(rdev);
 448                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 449         }
 450 }
 451
 452 /**
 453  * radeon_irq_kms_enable_afmt - enable audio format change interrupt
 454  *
 455  * @rdev: radeon device pointer
 456  * @block: afmt block whose interrupt you want to enable
 457  *
 458  * Enables the afmt change interrupt for a specific afmt block (all asics).
 459  */
 460 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
 461 {
 462         unsigned long irqflags;
 463
 464         if (!rdev->ddev->irq_enabled)
 465                 return;
 466
 467         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 468         rdev->irq.afmt[block] = true;
 469         radeon_irq_set(rdev);
 470         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 471
 472 }
 473
 474 /**
 475  * radeon_irq_kms_disable_afmt - disable audio format change interrupt
 476  *
 477  * @rdev: radeon device pointer
 478  * @block: afmt block whose interrupt you want to disable
 479  *
 480  * Disables the afmt change interrupt for a specific afmt block (all asics).
 481  */
 482 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
 483 {
 484         unsigned long irqflags;
 485
 486         if (!rdev->ddev->irq_enabled)
 487                 return;
 488
 489         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 490         rdev->irq.afmt[block] = false;
 491         radeon_irq_set(rdev);
 492         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 493 }
 494
 495 /**
 496  * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
 497  *
 498  * @rdev: radeon device pointer
 499  * @hpd_mask: mask of hpd pins you want to enable.
 500  *
 501  * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
 502  */
 503 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 504 {
 505         unsigned long irqflags;
 506         int i;
 507
 508         if (!rdev->ddev->irq_enabled)
 509                 return;
 510
 511         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 512         for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 513                 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
 514         radeon_irq_set(rdev);
 515         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 516 }
 517
 518 /**
 519  * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
 520  *
 521  * @rdev: radeon device pointer
 522  * @hpd_mask: mask of hpd pins you want to disable.
 523  *
 524  * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
 525  */
 526 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 527 {
 528         unsigned long irqflags;
 529         int i;
 530
 531         if (!rdev->ddev->irq_enabled)
 532                 return;
 533
 534         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 535         for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 536                 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
 537         radeon_irq_set(rdev);
 538         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 539 }
 540