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);
  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);
 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