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         if (mode_config->num_connector) {
  89                 list_for_each_entry(connector, &mode_config->connector_list, head)
  90                         radeon_connector_hotplug(connector);
  91         }
  92         mutex_unlock(&mode_config->mutex);
  93         /* Just fire off a uevent and let userspace tell us what to do */
  94         drm_helper_hpd_irq_event(dev);
  95 }
  96
  97 static void radeon_dp_work_func(struct work_struct *work)
  98 {
  99         struct radeon_device *rdev = container_of(work, struct radeon_device,
 100                                                   dp_work);
 101         struct drm_device *dev = rdev->ddev;
 102         struct drm_mode_config *mode_config = &dev->mode_config;
 103         struct drm_connector *connector;
 104
 105         /* this should take a mutex */
 106         if (mode_config->num_connector) {
 107                 list_for_each_entry(connector, &mode_config->connector_list, head)
 108                         radeon_connector_hotplug(connector);
 109         }
 110 }
 111 /**
 112  * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
 113  *
 114  * @dev: drm dev pointer
 115  *
 116  * Gets the hw ready to enable irqs (all asics).
 117  * This function disables all interrupt sources on the GPU.
 118  */
 119 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
 120 {
 121         struct radeon_device *rdev = dev->dev_private;
 122         unsigned long irqflags;
 123         unsigned i;
 124
 125         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 126         /* Disable *all* interrupts */
 127         for (i = 0; i < RADEON_NUM_RINGS; i++)
 128                 atomic_set(&rdev->irq.ring_int[i], 0);
 129         rdev->irq.dpm_thermal = false;
 130         for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
 131                 rdev->irq.hpd[i] = false;
 132         for (i = 0; i < RADEON_MAX_CRTCS; i++) {
 133                 rdev->irq.crtc_vblank_int[i] = false;
 134                 atomic_set(&rdev->irq.pflip[i], 0);
 135                 rdev->irq.afmt[i] = false;
 136         }
 137         radeon_irq_set(rdev);
 138         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 139         /* Clear bits */
 140         radeon_irq_process(rdev);
 141 }
 142
 143 /**
 144  * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
 145  *
 146  * @dev: drm dev pointer
 147  *
 148  * Handles stuff to be done after enabling irqs (all asics).
 149  * Returns 0 on success.
 150  */
 151 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
 152 {
 153         struct radeon_device *rdev = dev->dev_private;
 154
 155         if (ASIC_IS_AVIVO(rdev))
 156                 dev->max_vblank_count = 0x00ffffff;
 157         else
 158                 dev->max_vblank_count = 0x001fffff;
 159
 160         return 0;
 161 }
 162
 163 /**
 164  * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
 165  *
 166  * @dev: drm dev pointer
 167  *
 168  * This function disables all interrupt sources on the GPU (all asics).
 169  */
 170 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
 171 {
 172         struct radeon_device *rdev = dev->dev_private;
 173         unsigned long irqflags;
 174         unsigned i;
 175
 176         if (rdev == NULL) {
 177                 return;
 178         }
 179         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 180         /* Disable *all* interrupts */
 181         for (i = 0; i < RADEON_NUM_RINGS; i++)
 182                 atomic_set(&rdev->irq.ring_int[i], 0);
 183         rdev->irq.dpm_thermal = false;
 184         for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
 185                 rdev->irq.hpd[i] = false;
 186         for (i = 0; i < RADEON_MAX_CRTCS; i++) {
 187                 rdev->irq.crtc_vblank_int[i] = false;
 188                 atomic_set(&rdev->irq.pflip[i], 0);
 189                 rdev->irq.afmt[i] = false;
 190         }
 191         radeon_irq_set(rdev);
 192         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 193 }
 194
 195 /**
 196  * radeon_msi_ok - asic specific msi checks
 197  *
 198  * @rdev: radeon device pointer
 199  *
 200  * Handles asic specific MSI checks to determine if
 201  * MSIs should be enabled on a particular chip (all asics).
 202  * Returns true if MSIs should be enabled, false if MSIs
 203  * should not be enabled.
 204  */
 205 static bool radeon_msi_ok(struct radeon_device *rdev)
 206 {
 207         /* RV370/RV380 was first asic with MSI support */
 208         if (rdev->family < CHIP_RV380)
 209                 return false;
 210
 211         /* MSIs don't work on AGP */
 212         if (rdev->flags & RADEON_IS_AGP)
 213                 return false;
 214
 215         /*
 216          * Older chips have a HW limitation, they can only generate 40 bits
 217          * of address for "64-bit" MSIs which breaks on some platforms, notably
 218          * IBM POWER servers, so we limit them
 219          */
 220         if (rdev->family < CHIP_BONAIRE) {
 221                 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
 222                 rdev->pdev->no_64bit_msi = 1;
 223         }
 224
 225         /* force MSI on */
 226         if (radeon_msi == 1)
 227                 return true;
 228         else if (radeon_msi == 0)
 229                 return false;
 230
 231         /* Quirks */
 232         /* HP RS690 only seems to work with MSIs. */
 233         if ((rdev->pdev->device == 0x791f) &&
 234             (rdev->pdev->subsystem_vendor == 0x103c) &&
 235             (rdev->pdev->subsystem_device == 0x30c2))
 236                 return true;
 237
 238         /* Dell RS690 only seems to work with MSIs. */
 239         if ((rdev->pdev->device == 0x791f) &&
 240             (rdev->pdev->subsystem_vendor == 0x1028) &&
 241             (rdev->pdev->subsystem_device == 0x01fc))
 242                 return true;
 243
 244         /* Dell RS690 only seems to work with MSIs. */
 245         if ((rdev->pdev->device == 0x791f) &&
 246             (rdev->pdev->subsystem_vendor == 0x1028) &&
 247             (rdev->pdev->subsystem_device == 0x01fd))
 248                 return true;
 249
 250         /* Gateway RS690 only seems to work with MSIs. */
 251         if ((rdev->pdev->device == 0x791f) &&
 252             (rdev->pdev->subsystem_vendor == 0x107b) &&
 253             (rdev->pdev->subsystem_device == 0x0185))
 254                 return true;
 255
 256         /* try and enable MSIs by default on all RS690s */
 257         if (rdev->family == CHIP_RS690)
 258                 return true;
 259
 260         /* RV515 seems to have MSI issues where it loses
 261          * MSI rearms occasionally. This leads to lockups and freezes.
 262          * disable it by default.
 263          */
 264         if (rdev->family == CHIP_RV515)
 265                 return false;
 266         if (rdev->flags & RADEON_IS_IGP) {
 267                 /* APUs work fine with MSIs */
 268                 if (rdev->family >= CHIP_PALM)
 269                         return true;
 270                 /* lots of IGPs have problems with MSIs */
 271                 return false;
 272         }
 273
 274         return true;
 275 }
 276
 277 /**
 278  * radeon_irq_kms_init - init driver interrupt info
 279  *
 280  * @rdev: radeon device pointer
 281  *
 282  * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
 283  * Returns 0 for success, error for failure.
 284  */
 285 int radeon_irq_kms_init(struct radeon_device *rdev)
 286 {
 287         int r = 0;
 288
 289         spin_lock_init(&rdev->irq.lock);
 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         drm_vblank_cleanup(rdev->ddev);
 332         if (rdev->irq.installed) {
 333                 drm_irq_uninstall(rdev->ddev);
 334                 rdev->irq.installed = false;
 335                 if (rdev->msi_enabled)
 336                         pci_disable_msi(rdev->pdev);
 337                 flush_delayed_work(&rdev->hotplug_work);
 338         }
 339 }
 340
 341 /**
 342  * radeon_irq_kms_sw_irq_get - enable software interrupt
 343  *
 344  * @rdev: radeon device pointer
 345  * @ring: ring whose interrupt you want to enable
 346  *
 347  * Enables the software interrupt for a specific ring (all asics).
 348  * The software interrupt is generally used to signal a fence on
 349  * a particular ring.
 350  */
 351 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
 352 {
 353         unsigned long irqflags;
 354
 355         if (!rdev->ddev->irq_enabled)
 356                 return;
 357
 358         if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
 359                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 360                 radeon_irq_set(rdev);
 361                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 362         }
 363 }
 364
 365 /**
 366  * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
 367  *
 368  * @rdev: radeon device pointer
 369  * @ring: ring whose interrupt you want to enable
 370  *
 371  * Enables the software interrupt for a specific ring (all asics).
 372  * The software interrupt is generally used to signal a fence on
 373  * a particular ring.
 374  */
 375 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
 376 {
 377         return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
 378 }
 379
 380 /**
 381  * radeon_irq_kms_sw_irq_put - disable software interrupt
 382  *
 383  * @rdev: radeon device pointer
 384  * @ring: ring whose interrupt you want to disable
 385  *
 386  * Disables the software interrupt for a specific ring (all asics).
 387  * The software interrupt is generally used to signal a fence on
 388  * a particular ring.
 389  */
 390 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
 391 {
 392         unsigned long irqflags;
 393
 394         if (!rdev->ddev->irq_enabled)
 395                 return;
 396
 397         if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
 398                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 399                 radeon_irq_set(rdev);
 400                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 401         }
 402 }
 403
 404 /**
 405  * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
 406  *
 407  * @rdev: radeon device pointer
 408  * @crtc: crtc whose interrupt you want to enable
 409  *
 410  * Enables the pageflip interrupt for a specific crtc (all asics).
 411  * For pageflips we use the vblank interrupt source.
 412  */
 413 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
 414 {
 415         unsigned long irqflags;
 416
 417         if (crtc < 0 || crtc >= rdev->num_crtc)
 418                 return;
 419
 420         if (!rdev->ddev->irq_enabled)
 421                 return;
 422
 423         if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
 424                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 425                 radeon_irq_set(rdev);
 426                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 427         }
 428 }
 429
 430 /**
 431  * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
 432  *
 433  * @rdev: radeon device pointer
 434  * @crtc: crtc whose interrupt you want to disable
 435  *
 436  * Disables the pageflip interrupt for a specific crtc (all asics).
 437  * For pageflips we use the vblank interrupt source.
 438  */
 439 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
 440 {
 441         unsigned long irqflags;
 442
 443         if (crtc < 0 || crtc >= rdev->num_crtc)
 444                 return;
 445
 446         if (!rdev->ddev->irq_enabled)
 447                 return;
 448
 449         if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
 450                 spin_lock_irqsave(&rdev->irq.lock, irqflags);
 451                 radeon_irq_set(rdev);
 452                 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 453         }
 454 }
 455
 456 /**
 457  * radeon_irq_kms_enable_afmt - enable audio format change interrupt
 458  *
 459  * @rdev: radeon device pointer
 460  * @block: afmt block whose interrupt you want to enable
 461  *
 462  * Enables the afmt change interrupt for a specific afmt block (all asics).
 463  */
 464 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
 465 {
 466         unsigned long irqflags;
 467
 468         if (!rdev->ddev->irq_enabled)
 469                 return;
 470
 471         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 472         rdev->irq.afmt[block] = true;
 473         radeon_irq_set(rdev);
 474         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 475
 476 }
 477
 478 /**
 479  * radeon_irq_kms_disable_afmt - disable audio format change interrupt
 480  *
 481  * @rdev: radeon device pointer
 482  * @block: afmt block whose interrupt you want to disable
 483  *
 484  * Disables the afmt change interrupt for a specific afmt block (all asics).
 485  */
 486 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
 487 {
 488         unsigned long irqflags;
 489
 490         if (!rdev->ddev->irq_enabled)
 491                 return;
 492
 493         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 494         rdev->irq.afmt[block] = false;
 495         radeon_irq_set(rdev);
 496         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 497 }
 498
 499 /**
 500  * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
 501  *
 502  * @rdev: radeon device pointer
 503  * @hpd_mask: mask of hpd pins you want to enable.
 504  *
 505  * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
 506  */
 507 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 508 {
 509         unsigned long irqflags;
 510         int i;
 511
 512         if (!rdev->ddev->irq_enabled)
 513                 return;
 514
 515         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 516         for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 517                 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
 518         radeon_irq_set(rdev);
 519         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 520 }
 521
 522 /**
 523  * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
 524  *
 525  * @rdev: radeon device pointer
 526  * @hpd_mask: mask of hpd pins you want to disable.
 527  *
 528  * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
 529  */
 530 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 531 {
 532         unsigned long irqflags;
 533         int i;
 534
 535         if (!rdev->ddev->irq_enabled)
 536                 return;
 537
 538         spin_lock_irqsave(&rdev->irq.lock, irqflags);
 539         for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 540                 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
 541         radeon_irq_set(rdev);
 542         spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 543 }
 544