drivers/gpu/drm/i915/i915_drv.c

   1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
   2  */
   3 /*
   4  *
   5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  */
  29
  30 #include <linux/device.h>
  31 #include "drmP.h"
  32 #include "drm.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35
  36 #include "drm_pciids.h"
  37 #include <linux/console.h>
  38 #include "drm_crtc_helper.h"
  39
  40 static int i915_modeset = -1;
  41 module_param_named(modeset, i915_modeset, int, 0400);
  42
  43 unsigned int i915_fbpercrtc = 0;
  44 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
  45
  46 unsigned int i915_powersave = 1;
  47 module_param_named(powersave, i915_powersave, int, 0400);
  48
  49 static struct drm_driver driver;
  50
  51 static struct pci_device_id pciidlist[] = {
  52         i915_PCI_IDS
  53 };
  54
  55 #if defined(CONFIG_DRM_I915_KMS)
  56 MODULE_DEVICE_TABLE(pci, pciidlist);
  57 #endif
  58
  59 static int i915_suspend(struct drm_device *dev, pm_message_t state)
  60 {
  61         struct drm_i915_private *dev_priv = dev->dev_private;
  62
  63         if (!dev || !dev_priv) {
  64                 DRM_ERROR("dev: %p, dev_priv: %p\n", dev, dev_priv);
  65                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
  66                 return -ENODEV;
  67         }
  68
  69         if (state.event == PM_EVENT_PRETHAW)
  70                 return 0;
  71
  72         pci_save_state(dev->pdev);
  73
  74         /* If KMS is active, we do the leavevt stuff here */
  75         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  76                 if (i915_gem_idle(dev))
  77                         dev_err(&dev->pdev->dev,
  78                                 "GEM idle failed, resume may fail\n");
  79                 drm_irq_uninstall(dev);
  80         }
  81
  82         i915_save_state(dev);
  83
  84         intel_opregion_free(dev, 1);
  85
  86         if (state.event == PM_EVENT_SUSPEND) {
  87                 /* Shut down the device */
  88                 pci_disable_device(dev->pdev);
  89                 pci_set_power_state(dev->pdev, PCI_D3hot);
  90         }
  91
  92         /* Modeset on resume, not lid events */
  93         dev_priv->modeset_on_lid = 0;
  94
  95         return 0;
  96 }
  97
  98 static int i915_resume(struct drm_device *dev)
  99 {
 100         struct drm_i915_private *dev_priv = dev->dev_private;
 101         int ret = 0;
 102
 103         if (pci_enable_device(dev->pdev))
 104                 return -1;
 105         pci_set_master(dev->pdev);
 106
 107         i915_restore_state(dev);
 108
 109         intel_opregion_init(dev, 1);
 110
 111         /* KMS EnterVT equivalent */
 112         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 113                 mutex_lock(&dev->struct_mutex);
 114                 dev_priv->mm.suspended = 0;
 115
 116                 ret = i915_gem_init_ringbuffer(dev);
 117                 if (ret != 0)
 118                         ret = -1;
 119                 mutex_unlock(&dev->struct_mutex);
 120
 121                 drm_irq_install(dev);
 122         }
 123         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 124                 /* Resume the modeset for every activated CRTC */
 125                 drm_helper_resume_force_mode(dev);
 126         }
 127
 128         dev_priv->modeset_on_lid = 0;
 129
 130         return ret;
 131 }
 132
 133 /**
 134  * i965_reset - reset chip after a hang
 135  * @dev: drm device to reset
 136  * @flags: reset domains
 137  *
 138  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 139  * reset or otherwise an error code.
 140  *
 141  * Procedure is fairly simple:
 142  *   - reset the chip using the reset reg
 143  *   - re-init context state
 144  *   - re-init hardware status page
 145  *   - re-init ring buffer
 146  *   - re-init interrupt state
 147  *   - re-init display
 148  */
 149 int i965_reset(struct drm_device *dev, u8 flags)
 150 {
 151         drm_i915_private_t *dev_priv = dev->dev_private;
 152         unsigned long timeout;
 153         u8 gdrst;
 154         /*
 155          * We really should only reset the display subsystem if we actually
 156          * need to
 157          */
 158         bool need_display = true;
 159
 160         mutex_lock(&dev->struct_mutex);
 161
 162         /*
 163          * Clear request list
 164          */
 165         i915_gem_retire_requests(dev);
 166
 167         if (need_display)
 168                 i915_save_display(dev);
 169
 170         if (IS_I965G(dev) || IS_G4X(dev)) {
 171                 /*
 172                  * Set the domains we want to reset, then the reset bit (bit 0).
 173                  * Clear the reset bit after a while and wait for hardware status
 174                  * bit (bit 1) to be set
 175                  */
 176                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 177                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
 178                 udelay(50);
 179                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
 180
 181                 /* ...we don't want to loop forever though, 500ms should be plenty */
 182                timeout = jiffies + msecs_to_jiffies(500);
 183                 do {
 184                         udelay(100);
 185                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 186                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
 187
 188                 if (gdrst & 0x1) {
 189                         WARN(true, "i915: Failed to reset chip\n");
 190                         mutex_unlock(&dev->struct_mutex);
 191                         return -EIO;
 192                 }
 193         } else {
 194                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
 195                 return -ENODEV;
 196         }
 197
 198         /* Ok, now get things going again... */
 199
 200         /*
 201          * Everything depends on having the GTT running, so we need to start
 202          * there.  Fortunately we don't need to do this unless we reset the
 203          * chip at a PCI level.
 204          *
 205          * Next we need to restore the context, but we don't use those
 206          * yet either...
 207          *
 208          * Ring buffer needs to be re-initialized in the KMS case, or if X
 209          * was running at the time of the reset (i.e. we weren't VT
 210          * switched away).
 211          */
 212         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 213             !dev_priv->mm.suspended) {
 214                 drm_i915_ring_buffer_t *ring = &dev_priv->ring;
 215                 struct drm_gem_object *obj = ring->ring_obj;
 216                 struct drm_i915_gem_object *obj_priv = obj->driver_private;
 217                 dev_priv->mm.suspended = 0;
 218
 219                 /* Stop the ring if it's running. */
 220                 I915_WRITE(PRB0_CTL, 0);
 221                 I915_WRITE(PRB0_TAIL, 0);
 222                 I915_WRITE(PRB0_HEAD, 0);
 223
 224                 /* Initialize the ring. */
 225                 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
 226                 I915_WRITE(PRB0_CTL,
 227                            ((obj->size - 4096) & RING_NR_PAGES) |
 228                            RING_NO_REPORT |
 229                            RING_VALID);
 230                 if (!drm_core_check_feature(dev, DRIVER_MODESET))
 231                         i915_kernel_lost_context(dev);
 232                 else {
 233                         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 234                         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 235                         ring->space = ring->head - (ring->tail + 8);
 236                         if (ring->space < 0)
 237                                 ring->space += ring->Size;
 238                 }
 239
 240                 mutex_unlock(&dev->struct_mutex);
 241                 drm_irq_uninstall(dev);
 242                 drm_irq_install(dev);
 243                 mutex_lock(&dev->struct_mutex);
 244         }
 245
 246         /*
 247          * Display needs restore too...
 248          */
 249         if (need_display)
 250                 i915_restore_display(dev);
 251
 252         mutex_unlock(&dev->struct_mutex);
 253         return 0;
 254 }
 255
 256
 257 static int __devinit
 258 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 259 {
 260         return drm_get_dev(pdev, ent, &driver);
 261 }
 262
 263 static void
 264 i915_pci_remove(struct pci_dev *pdev)
 265 {
 266         struct drm_device *dev = pci_get_drvdata(pdev);
 267
 268         drm_put_dev(dev);
 269 }
 270
 271 static int
 272 i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 273 {
 274         struct drm_device *dev = pci_get_drvdata(pdev);
 275
 276         return i915_suspend(dev, state);
 277 }
 278
 279 static int
 280 i915_pci_resume(struct pci_dev *pdev)
 281 {
 282         struct drm_device *dev = pci_get_drvdata(pdev);
 283
 284         return i915_resume(dev);
 285 }
 286
 287 static struct vm_operations_struct i915_gem_vm_ops = {
 288         .fault = i915_gem_fault,
 289         .open = drm_gem_vm_open,
 290         .close = drm_gem_vm_close,
 291 };
 292
 293 static struct drm_driver driver = {
 294         /* don't use mtrr's here, the Xserver or user space app should
 295          * deal with them for intel hardware.
 296          */
 297         .driver_features =
 298             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
 299             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
 300         .load = i915_driver_load,
 301         .unload = i915_driver_unload,
 302         .open = i915_driver_open,
 303         .lastclose = i915_driver_lastclose,
 304         .preclose = i915_driver_preclose,
 305         .postclose = i915_driver_postclose,
 306         .suspend = i915_suspend,
 307         .resume = i915_resume,
 308         .device_is_agp = i915_driver_device_is_agp,
 309         .enable_vblank = i915_enable_vblank,
 310         .disable_vblank = i915_disable_vblank,
 311         .irq_preinstall = i915_driver_irq_preinstall,
 312         .irq_postinstall = i915_driver_irq_postinstall,
 313         .irq_uninstall = i915_driver_irq_uninstall,
 314         .irq_handler = i915_driver_irq_handler,
 315         .reclaim_buffers = drm_core_reclaim_buffers,
 316         .get_map_ofs = drm_core_get_map_ofs,
 317         .get_reg_ofs = drm_core_get_reg_ofs,
 318         .master_create = i915_master_create,
 319         .master_destroy = i915_master_destroy,
 320 #if defined(CONFIG_DEBUG_FS)
 321         .debugfs_init = i915_debugfs_init,
 322         .debugfs_cleanup = i915_debugfs_cleanup,
 323 #endif
 324         .gem_init_object = i915_gem_init_object,
 325         .gem_free_object = i915_gem_free_object,
 326         .gem_vm_ops = &i915_gem_vm_ops,
 327         .ioctls = i915_ioctls,
 328         .fops = {
 329                  .owner = THIS_MODULE,
 330                  .open = drm_open,
 331                  .release = drm_release,
 332                  .ioctl = drm_ioctl,
 333                  .mmap = drm_gem_mmap,
 334                  .poll = drm_poll,
 335                  .fasync = drm_fasync,
 336                  .read = drm_read,
 337 #ifdef CONFIG_COMPAT
 338                  .compat_ioctl = i915_compat_ioctl,
 339 #endif
 340         },
 341
 342         .pci_driver = {
 343                  .name = DRIVER_NAME,
 344                  .id_table = pciidlist,
 345                  .probe = i915_pci_probe,
 346                  .remove = i915_pci_remove,
 347 #ifdef CONFIG_PM
 348                  .resume = i915_pci_resume,
 349                  .suspend = i915_pci_suspend,
 350 #endif
 351         },
 352
 353         .name = DRIVER_NAME,
 354         .desc = DRIVER_DESC,
 355         .date = DRIVER_DATE,
 356         .major = DRIVER_MAJOR,
 357         .minor = DRIVER_MINOR,
 358         .patchlevel = DRIVER_PATCHLEVEL,
 359 };
 360
 361 static int __init i915_init(void)
 362 {
 363         driver.num_ioctls = i915_max_ioctl;
 364
 365         i915_gem_shrinker_init();
 366
 367         /*
 368          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 369          * explicitly disabled with the module pararmeter.
 370          *
 371          * Otherwise, just follow the parameter (defaulting to off).
 372          *
 373          * Allow optional vga_text_mode_force boot option to override
 374          * the default behavior.
 375          */
 376 #if defined(CONFIG_DRM_I915_KMS)
 377         if (i915_modeset != 0)
 378                 driver.driver_features |= DRIVER_MODESET;
 379 #endif
 380         if (i915_modeset == 1)
 381                 driver.driver_features |= DRIVER_MODESET;
 382
 383 #ifdef CONFIG_VGA_CONSOLE
 384         if (vgacon_text_force() && i915_modeset == -1)
 385                 driver.driver_features &= ~DRIVER_MODESET;
 386 #endif
 387
 388         return drm_init(&driver);
 389 }
 390
 391 static void __exit i915_exit(void)
 392 {
 393         i915_gem_shrinker_exit();
 394         drm_exit(&driver);
 395 }
 396
 397 module_init(i915_init);
 398 module_exit(i915_exit);
 399
 400 MODULE_AUTHOR(DRIVER_AUTHOR);
 401 MODULE_DESCRIPTION(DRIVER_DESC);
 402 MODULE_LICENSE("GPL and additional rights");