SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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         dev_priv->suspended = 1;
  93
  94         return 0;
  95 }
  96
  97 static int i915_resume(struct drm_device *dev)
  98 {
  99         struct drm_i915_private *dev_priv = dev->dev_private;
 100         int ret = 0;
 101
 102         pci_set_power_state(dev->pdev, PCI_D0);
 103         pci_restore_state(dev->pdev);
 104         if (pci_enable_device(dev->pdev))
 105                 return -1;
 106         pci_set_master(dev->pdev);
 107
 108         i915_restore_state(dev);
 109
 110         intel_opregion_init(dev, 1);
 111
 112         /* KMS EnterVT equivalent */
 113         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 114                 mutex_lock(&dev->struct_mutex);
 115                 dev_priv->mm.suspended = 0;
 116
 117                 ret = i915_gem_init_ringbuffer(dev);
 118                 if (ret != 0)
 119                         ret = -1;
 120                 mutex_unlock(&dev->struct_mutex);
 121
 122                 drm_irq_install(dev);
 123         }
 124         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 125                 /* Resume the modeset for every activated CRTC */
 126                 drm_helper_resume_force_mode(dev);
 127         }
 128
 129         dev_priv->suspended = 0;
 130
 131         return ret;
 132 }
 133
 134 /**
 135  * i965_reset - reset chip after a hang
 136  * @dev: drm device to reset
 137  * @flags: reset domains
 138  *
 139  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 140  * reset or otherwise an error code.
 141  *
 142  * Procedure is fairly simple:
 143  *   - reset the chip using the reset reg
 144  *   - re-init context state
 145  *   - re-init hardware status page
 146  *   - re-init ring buffer
 147  *   - re-init interrupt state
 148  *   - re-init display
 149  */
 150 int i965_reset(struct drm_device *dev, u8 flags)
 151 {
 152         drm_i915_private_t *dev_priv = dev->dev_private;
 153         unsigned long timeout;
 154         u8 gdrst;
 155         /*
 156          * We really should only reset the display subsystem if we actually
 157          * need to
 158          */
 159         bool need_display = true;
 160
 161         mutex_lock(&dev->struct_mutex);
 162
 163         /*
 164          * Clear request list
 165          */
 166         i915_gem_retire_requests(dev);
 167
 168         if (need_display)
 169                 i915_save_display(dev);
 170
 171         if (IS_I965G(dev) || IS_G4X(dev)) {
 172                 /*
 173                  * Set the domains we want to reset, then the reset bit (bit 0).
 174                  * Clear the reset bit after a while and wait for hardware status
 175                  * bit (bit 1) to be set
 176                  */
 177                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 178                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
 179                 udelay(50);
 180                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
 181
 182                 /* ...we don't want to loop forever though, 500ms should be plenty */
 183                timeout = jiffies + msecs_to_jiffies(500);
 184                 do {
 185                         udelay(100);
 186                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 187                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
 188
 189                 if (gdrst & 0x1) {
 190                         WARN(true, "i915: Failed to reset chip\n");
 191                         mutex_unlock(&dev->struct_mutex);
 192                         return -EIO;
 193                 }
 194         } else {
 195                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
 196                 return -ENODEV;
 197         }
 198
 199         /* Ok, now get things going again... */
 200
 201         /*
 202          * Everything depends on having the GTT running, so we need to start
 203          * there.  Fortunately we don't need to do this unless we reset the
 204          * chip at a PCI level.
 205          *
 206          * Next we need to restore the context, but we don't use those
 207          * yet either...
 208          *
 209          * Ring buffer needs to be re-initialized in the KMS case, or if X
 210          * was running at the time of the reset (i.e. we weren't VT
 211          * switched away).
 212          */
 213         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 214             !dev_priv->mm.suspended) {
 215                 drm_i915_ring_buffer_t *ring = &dev_priv->ring;
 216                 struct drm_gem_object *obj = ring->ring_obj;
 217                 struct drm_i915_gem_object *obj_priv = obj->driver_private;
 218                 dev_priv->mm.suspended = 0;
 219
 220                 /* Stop the ring if it's running. */
 221                 I915_WRITE(PRB0_CTL, 0);
 222                 I915_WRITE(PRB0_TAIL, 0);
 223                 I915_WRITE(PRB0_HEAD, 0);
 224
 225                 /* Initialize the ring. */
 226                 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
 227                 I915_WRITE(PRB0_CTL,
 228                            ((obj->size - 4096) & RING_NR_PAGES) |
 229                            RING_NO_REPORT |
 230                            RING_VALID);
 231                 if (!drm_core_check_feature(dev, DRIVER_MODESET))
 232                         i915_kernel_lost_context(dev);
 233                 else {
 234                         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 235                         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 236                         ring->space = ring->head - (ring->tail + 8);
 237                         if (ring->space < 0)
 238                                 ring->space += ring->Size;
 239                 }
 240
 241                 mutex_unlock(&dev->struct_mutex);
 242                 drm_irq_uninstall(dev);
 243                 drm_irq_install(dev);
 244                 mutex_lock(&dev->struct_mutex);
 245         }
 246
 247         /*
 248          * Display needs restore too...
 249          */
 250         if (need_display)
 251                 i915_restore_display(dev);
 252
 253         mutex_unlock(&dev->struct_mutex);
 254         return 0;
 255 }
 256
 257
 258 static int __devinit
 259 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 260 {
 261         return drm_get_dev(pdev, ent, &driver);
 262 }
 263
 264 static void
 265 i915_pci_remove(struct pci_dev *pdev)
 266 {
 267         struct drm_device *dev = pci_get_drvdata(pdev);
 268
 269         drm_put_dev(dev);
 270 }
 271
 272 static int
 273 i915_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 274 {
 275         struct drm_device *dev = pci_get_drvdata(pdev);
 276
 277         return i915_suspend(dev, state);
 278 }
 279
 280 static int
 281 i915_pci_resume(struct pci_dev *pdev)
 282 {
 283         struct drm_device *dev = pci_get_drvdata(pdev);
 284
 285         return i915_resume(dev);
 286 }
 287
 288 static struct vm_operations_struct i915_gem_vm_ops = {
 289         .fault = i915_gem_fault,
 290         .open = drm_gem_vm_open,
 291         .close = drm_gem_vm_close,
 292 };
 293
 294 static struct drm_driver driver = {
 295         /* don't use mtrr's here, the Xserver or user space app should
 296          * deal with them for intel hardware.
 297          */
 298         .driver_features =
 299             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
 300             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
 301         .load = i915_driver_load,
 302         .unload = i915_driver_unload,
 303         .open = i915_driver_open,
 304         .lastclose = i915_driver_lastclose,
 305         .preclose = i915_driver_preclose,
 306         .postclose = i915_driver_postclose,
 307         .suspend = i915_suspend,
 308         .resume = i915_resume,
 309         .device_is_agp = i915_driver_device_is_agp,
 310         .enable_vblank = i915_enable_vblank,
 311         .disable_vblank = i915_disable_vblank,
 312         .irq_preinstall = i915_driver_irq_preinstall,
 313         .irq_postinstall = i915_driver_irq_postinstall,
 314         .irq_uninstall = i915_driver_irq_uninstall,
 315         .irq_handler = i915_driver_irq_handler,
 316         .reclaim_buffers = drm_core_reclaim_buffers,
 317         .get_map_ofs = drm_core_get_map_ofs,
 318         .get_reg_ofs = drm_core_get_reg_ofs,
 319         .master_create = i915_master_create,
 320         .master_destroy = i915_master_destroy,
 321 #if defined(CONFIG_DEBUG_FS)
 322         .debugfs_init = i915_debugfs_init,
 323         .debugfs_cleanup = i915_debugfs_cleanup,
 324 #endif
 325         .gem_init_object = i915_gem_init_object,
 326         .gem_free_object = i915_gem_free_object,
 327         .gem_vm_ops = &i915_gem_vm_ops,
 328         .ioctls = i915_ioctls,
 329         .fops = {
 330                  .owner = THIS_MODULE,
 331                  .open = drm_open,
 332                  .release = drm_release,
 333                  .ioctl = drm_ioctl,
 334                  .mmap = drm_gem_mmap,
 335                  .poll = drm_poll,
 336                  .fasync = drm_fasync,
 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         /*
 366          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 367          * explicitly disabled with the module pararmeter.
 368          *
 369          * Otherwise, just follow the parameter (defaulting to off).
 370          *
 371          * Allow optional vga_text_mode_force boot option to override
 372          * the default behavior.
 373          */
 374 #if defined(CONFIG_DRM_I915_KMS)
 375         if (i915_modeset != 0)
 376                 driver.driver_features |= DRIVER_MODESET;
 377 #endif
 378         if (i915_modeset == 1)
 379                 driver.driver_features |= DRIVER_MODESET;
 380
 381 #ifdef CONFIG_VGA_CONSOLE
 382         if (vgacon_text_force() && i915_modeset == -1)
 383                 driver.driver_features &= ~DRIVER_MODESET;
 384 #endif
 385
 386         return drm_init(&driver);
 387 }
 388
 389 static void __exit i915_exit(void)
 390 {
 391         drm_exit(&driver);
 392 }
 393
 394 module_init(i915_init);
 395 module_exit(i915_exit);
 396
 397 MODULE_AUTHOR(DRIVER_AUTHOR);
 398 MODULE_DESCRIPTION(DRIVER_DESC);
 399 MODULE_LICENSE("GPL and additional rights");