vga_switcheroo: initial implementation (v15)
[linux-2.6.git] / 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 <linux/console.h>
37 #include "drm_crtc_helper.h"
38
39 static int i915_modeset = -1;
40 module_param_named(modeset, i915_modeset, int, 0400);
41
42 unsigned int i915_fbpercrtc = 0;
43 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
44
45 unsigned int i915_powersave = 1;
46 module_param_named(powersave, i915_powersave, int, 0400);
47
48 unsigned int i915_lvds_downclock = 0;
49 module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);
50
51 static struct drm_driver driver;
52
53 #define INTEL_VGA_DEVICE(id, info) {            \
54         .class = PCI_CLASS_DISPLAY_VGA << 8,    \
55         .class_mask = 0xffff00,                 \
56         .vendor = 0x8086,                       \
57         .device = id,                           \
58         .subvendor = PCI_ANY_ID,                \
59         .subdevice = PCI_ANY_ID,                \
60         .driver_data = (unsigned long) info }
61
62 const static struct intel_device_info intel_i830_info = {
63         .is_i8xx = 1, .is_mobile = 1, .cursor_needs_physical = 1,
64 };
65
66 const static struct intel_device_info intel_845g_info = {
67         .is_i8xx = 1,
68 };
69
70 const static struct intel_device_info intel_i85x_info = {
71         .is_i8xx = 1, .is_mobile = 1, .cursor_needs_physical = 1,
72 };
73
74 const static struct intel_device_info intel_i865g_info = {
75         .is_i8xx = 1,
76 };
77
78 const static struct intel_device_info intel_i915g_info = {
79         .is_i915g = 1, .is_i9xx = 1, .cursor_needs_physical = 1,
80 };
81 const static struct intel_device_info intel_i915gm_info = {
82         .is_i9xx = 1,  .is_mobile = 1, .has_fbc = 1,
83         .cursor_needs_physical = 1,
84 };
85 const static struct intel_device_info intel_i945g_info = {
86         .is_i9xx = 1, .has_hotplug = 1, .cursor_needs_physical = 1,
87 };
88 const static struct intel_device_info intel_i945gm_info = {
89         .is_i945gm = 1, .is_i9xx = 1, .is_mobile = 1, .has_fbc = 1,
90         .has_hotplug = 1, .cursor_needs_physical = 1,
91 };
92
93 const static struct intel_device_info intel_i965g_info = {
94         .is_i965g = 1, .is_i9xx = 1, .has_hotplug = 1,
95 };
96
97 const static struct intel_device_info intel_i965gm_info = {
98         .is_i965g = 1, .is_mobile = 1, .is_i965gm = 1, .is_i9xx = 1,
99         .is_mobile = 1, .has_fbc = 1, .has_rc6 = 1,
100         .has_hotplug = 1,
101 };
102
103 const static struct intel_device_info intel_g33_info = {
104         .is_g33 = 1, .is_i9xx = 1, .need_gfx_hws = 1,
105         .has_hotplug = 1,
106 };
107
108 const static struct intel_device_info intel_g45_info = {
109         .is_i965g = 1, .is_g4x = 1, .is_i9xx = 1, .need_gfx_hws = 1,
110         .has_pipe_cxsr = 1,
111         .has_hotplug = 1,
112 };
113
114 const static struct intel_device_info intel_gm45_info = {
115         .is_i965g = 1, .is_mobile = 1, .is_g4x = 1, .is_i9xx = 1,
116         .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1, .has_rc6 = 1,
117         .has_pipe_cxsr = 1,
118         .has_hotplug = 1,
119 };
120
121 const static struct intel_device_info intel_pineview_info = {
122         .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .is_i9xx = 1,
123         .need_gfx_hws = 1,
124         .has_hotplug = 1,
125 };
126
127 const static struct intel_device_info intel_ironlake_d_info = {
128         .is_ironlake = 1, .is_i965g = 1, .is_i9xx = 1, .need_gfx_hws = 1,
129         .has_pipe_cxsr = 1,
130         .has_hotplug = 1,
131 };
132
133 const static struct intel_device_info intel_ironlake_m_info = {
134         .is_ironlake = 1, .is_mobile = 1, .is_i965g = 1, .is_i9xx = 1,
135         .need_gfx_hws = 1, .has_rc6 = 1,
136         .has_hotplug = 1,
137 };
138
139 const static struct pci_device_id pciidlist[] = {
140         INTEL_VGA_DEVICE(0x3577, &intel_i830_info),
141         INTEL_VGA_DEVICE(0x2562, &intel_845g_info),
142         INTEL_VGA_DEVICE(0x3582, &intel_i85x_info),
143         INTEL_VGA_DEVICE(0x35e8, &intel_i85x_info),
144         INTEL_VGA_DEVICE(0x2572, &intel_i865g_info),
145         INTEL_VGA_DEVICE(0x2582, &intel_i915g_info),
146         INTEL_VGA_DEVICE(0x258a, &intel_i915g_info),
147         INTEL_VGA_DEVICE(0x2592, &intel_i915gm_info),
148         INTEL_VGA_DEVICE(0x2772, &intel_i945g_info),
149         INTEL_VGA_DEVICE(0x27a2, &intel_i945gm_info),
150         INTEL_VGA_DEVICE(0x27ae, &intel_i945gm_info),
151         INTEL_VGA_DEVICE(0x2972, &intel_i965g_info),
152         INTEL_VGA_DEVICE(0x2982, &intel_i965g_info),
153         INTEL_VGA_DEVICE(0x2992, &intel_i965g_info),
154         INTEL_VGA_DEVICE(0x29a2, &intel_i965g_info),
155         INTEL_VGA_DEVICE(0x29b2, &intel_g33_info),
156         INTEL_VGA_DEVICE(0x29c2, &intel_g33_info),
157         INTEL_VGA_DEVICE(0x29d2, &intel_g33_info),
158         INTEL_VGA_DEVICE(0x2a02, &intel_i965gm_info),
159         INTEL_VGA_DEVICE(0x2a12, &intel_i965gm_info),
160         INTEL_VGA_DEVICE(0x2a42, &intel_gm45_info),
161         INTEL_VGA_DEVICE(0x2e02, &intel_g45_info),
162         INTEL_VGA_DEVICE(0x2e12, &intel_g45_info),
163         INTEL_VGA_DEVICE(0x2e22, &intel_g45_info),
164         INTEL_VGA_DEVICE(0x2e32, &intel_g45_info),
165         INTEL_VGA_DEVICE(0x2e42, &intel_g45_info),
166         INTEL_VGA_DEVICE(0xa001, &intel_pineview_info),
167         INTEL_VGA_DEVICE(0xa011, &intel_pineview_info),
168         INTEL_VGA_DEVICE(0x0042, &intel_ironlake_d_info),
169         INTEL_VGA_DEVICE(0x0046, &intel_ironlake_m_info),
170         {0, 0, 0}
171 };
172
173 #if defined(CONFIG_DRM_I915_KMS)
174 MODULE_DEVICE_TABLE(pci, pciidlist);
175 #endif
176
177 static int i915_drm_freeze(struct drm_device *dev)
178 {
179         struct drm_i915_private *dev_priv = dev->dev_private;
180
181         pci_save_state(dev->pdev);
182
183         /* If KMS is active, we do the leavevt stuff here */
184         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
185                 int error = i915_gem_idle(dev);
186                 if (error) {
187                         dev_err(&dev->pdev->dev,
188                                 "GEM idle failed, resume might fail\n");
189                         return error;
190                 }
191                 drm_irq_uninstall(dev);
192         }
193
194         i915_save_state(dev);
195
196         intel_opregion_free(dev, 1);
197
198         /* Modeset on resume, not lid events */
199         dev_priv->modeset_on_lid = 0;
200
201         return 0;
202 }
203
204 int i915_suspend(struct drm_device *dev, pm_message_t state)
205 {
206         int error;
207
208         if (!dev || !dev->dev_private) {
209                 DRM_ERROR("dev: %p\n", dev);
210                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
211                 return -ENODEV;
212         }
213
214         if (state.event == PM_EVENT_PRETHAW)
215                 return 0;
216
217         error = i915_drm_freeze(dev);
218         if (error)
219                 return error;
220
221         if (state.event == PM_EVENT_SUSPEND) {
222                 /* Shut down the device */
223                 pci_disable_device(dev->pdev);
224                 pci_set_power_state(dev->pdev, PCI_D3hot);
225         }
226
227         return 0;
228 }
229
230 static int i915_drm_thaw(struct drm_device *dev)
231 {
232         struct drm_i915_private *dev_priv = dev->dev_private;
233         int error = 0;
234
235         i915_restore_state(dev);
236
237         intel_opregion_init(dev, 1);
238
239         /* KMS EnterVT equivalent */
240         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
241                 mutex_lock(&dev->struct_mutex);
242                 dev_priv->mm.suspended = 0;
243
244                 error = i915_gem_init_ringbuffer(dev);
245                 mutex_unlock(&dev->struct_mutex);
246
247                 drm_irq_install(dev);
248
249                 /* Resume the modeset for every activated CRTC */
250                 drm_helper_resume_force_mode(dev);
251         }
252
253         dev_priv->modeset_on_lid = 0;
254
255         return error;
256 }
257
258 int i915_resume(struct drm_device *dev)
259 {
260         if (pci_enable_device(dev->pdev))
261                 return -EIO;
262
263         pci_set_master(dev->pdev);
264
265         return i915_drm_thaw(dev);
266 }
267
268 /**
269  * i965_reset - reset chip after a hang
270  * @dev: drm device to reset
271  * @flags: reset domains
272  *
273  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
274  * reset or otherwise an error code.
275  *
276  * Procedure is fairly simple:
277  *   - reset the chip using the reset reg
278  *   - re-init context state
279  *   - re-init hardware status page
280  *   - re-init ring buffer
281  *   - re-init interrupt state
282  *   - re-init display
283  */
284 int i965_reset(struct drm_device *dev, u8 flags)
285 {
286         drm_i915_private_t *dev_priv = dev->dev_private;
287         unsigned long timeout;
288         u8 gdrst;
289         /*
290          * We really should only reset the display subsystem if we actually
291          * need to
292          */
293         bool need_display = true;
294
295         mutex_lock(&dev->struct_mutex);
296
297         /*
298          * Clear request list
299          */
300         i915_gem_retire_requests(dev);
301
302         if (need_display)
303                 i915_save_display(dev);
304
305         if (IS_I965G(dev) || IS_G4X(dev)) {
306                 /*
307                  * Set the domains we want to reset, then the reset bit (bit 0).
308                  * Clear the reset bit after a while and wait for hardware status
309                  * bit (bit 1) to be set
310                  */
311                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
312                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
313                 udelay(50);
314                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
315
316                 /* ...we don't want to loop forever though, 500ms should be plenty */
317                timeout = jiffies + msecs_to_jiffies(500);
318                 do {
319                         udelay(100);
320                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
321                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
322
323                 if (gdrst & 0x1) {
324                         WARN(true, "i915: Failed to reset chip\n");
325                         mutex_unlock(&dev->struct_mutex);
326                         return -EIO;
327                 }
328         } else {
329                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
330                 return -ENODEV;
331         }
332
333         /* Ok, now get things going again... */
334
335         /*
336          * Everything depends on having the GTT running, so we need to start
337          * there.  Fortunately we don't need to do this unless we reset the
338          * chip at a PCI level.
339          *
340          * Next we need to restore the context, but we don't use those
341          * yet either...
342          *
343          * Ring buffer needs to be re-initialized in the KMS case, or if X
344          * was running at the time of the reset (i.e. we weren't VT
345          * switched away).
346          */
347         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
348             !dev_priv->mm.suspended) {
349                 drm_i915_ring_buffer_t *ring = &dev_priv->ring;
350                 struct drm_gem_object *obj = ring->ring_obj;
351                 struct drm_i915_gem_object *obj_priv = obj->driver_private;
352                 dev_priv->mm.suspended = 0;
353
354                 /* Stop the ring if it's running. */
355                 I915_WRITE(PRB0_CTL, 0);
356                 I915_WRITE(PRB0_TAIL, 0);
357                 I915_WRITE(PRB0_HEAD, 0);
358
359                 /* Initialize the ring. */
360                 I915_WRITE(PRB0_START, obj_priv->gtt_offset);
361                 I915_WRITE(PRB0_CTL,
362                            ((obj->size - 4096) & RING_NR_PAGES) |
363                            RING_NO_REPORT |
364                            RING_VALID);
365                 if (!drm_core_check_feature(dev, DRIVER_MODESET))
366                         i915_kernel_lost_context(dev);
367                 else {
368                         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
369                         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
370                         ring->space = ring->head - (ring->tail + 8);
371                         if (ring->space < 0)
372                                 ring->space += ring->Size;
373                 }
374
375                 mutex_unlock(&dev->struct_mutex);
376                 drm_irq_uninstall(dev);
377                 drm_irq_install(dev);
378                 mutex_lock(&dev->struct_mutex);
379         }
380
381         /*
382          * Display needs restore too...
383          */
384         if (need_display)
385                 i915_restore_display(dev);
386
387         mutex_unlock(&dev->struct_mutex);
388         return 0;
389 }
390
391
392 static int __devinit
393 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
394 {
395         return drm_get_dev(pdev, ent, &driver);
396 }
397
398 static void
399 i915_pci_remove(struct pci_dev *pdev)
400 {
401         struct drm_device *dev = pci_get_drvdata(pdev);
402
403         drm_put_dev(dev);
404 }
405
406 static int i915_pm_suspend(struct device *dev)
407 {
408         struct pci_dev *pdev = to_pci_dev(dev);
409         struct drm_device *drm_dev = pci_get_drvdata(pdev);
410         int error;
411
412         if (!drm_dev || !drm_dev->dev_private) {
413                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
414                 return -ENODEV;
415         }
416
417         error = i915_drm_freeze(drm_dev);
418         if (error)
419                 return error;
420
421         pci_disable_device(pdev);
422         pci_set_power_state(pdev, PCI_D3hot);
423
424         return 0;
425 }
426
427 static int i915_pm_resume(struct device *dev)
428 {
429         struct pci_dev *pdev = to_pci_dev(dev);
430         struct drm_device *drm_dev = pci_get_drvdata(pdev);
431
432         return i915_resume(drm_dev);
433 }
434
435 static int i915_pm_freeze(struct device *dev)
436 {
437         struct pci_dev *pdev = to_pci_dev(dev);
438         struct drm_device *drm_dev = pci_get_drvdata(pdev);
439
440         if (!drm_dev || !drm_dev->dev_private) {
441                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
442                 return -ENODEV;
443         }
444
445         return i915_drm_freeze(drm_dev);
446 }
447
448 static int i915_pm_thaw(struct device *dev)
449 {
450         struct pci_dev *pdev = to_pci_dev(dev);
451         struct drm_device *drm_dev = pci_get_drvdata(pdev);
452
453         return i915_drm_thaw(drm_dev);
454 }
455
456 static int i915_pm_poweroff(struct device *dev)
457 {
458         struct pci_dev *pdev = to_pci_dev(dev);
459         struct drm_device *drm_dev = pci_get_drvdata(pdev);
460
461         return i915_drm_freeze(drm_dev);
462 }
463
464 const struct dev_pm_ops i915_pm_ops = {
465      .suspend = i915_pm_suspend,
466      .resume = i915_pm_resume,
467      .freeze = i915_pm_freeze,
468      .thaw = i915_pm_thaw,
469      .poweroff = i915_pm_poweroff,
470      .restore = i915_pm_resume,
471 };
472
473 static struct vm_operations_struct i915_gem_vm_ops = {
474         .fault = i915_gem_fault,
475         .open = drm_gem_vm_open,
476         .close = drm_gem_vm_close,
477 };
478
479 static struct drm_driver driver = {
480         /* don't use mtrr's here, the Xserver or user space app should
481          * deal with them for intel hardware.
482          */
483         .driver_features =
484             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
485             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
486         .load = i915_driver_load,
487         .unload = i915_driver_unload,
488         .open = i915_driver_open,
489         .lastclose = i915_driver_lastclose,
490         .preclose = i915_driver_preclose,
491         .postclose = i915_driver_postclose,
492
493         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
494         .suspend = i915_suspend,
495         .resume = i915_resume,
496
497         .device_is_agp = i915_driver_device_is_agp,
498         .enable_vblank = i915_enable_vblank,
499         .disable_vblank = i915_disable_vblank,
500         .irq_preinstall = i915_driver_irq_preinstall,
501         .irq_postinstall = i915_driver_irq_postinstall,
502         .irq_uninstall = i915_driver_irq_uninstall,
503         .irq_handler = i915_driver_irq_handler,
504         .reclaim_buffers = drm_core_reclaim_buffers,
505         .get_map_ofs = drm_core_get_map_ofs,
506         .get_reg_ofs = drm_core_get_reg_ofs,
507         .master_create = i915_master_create,
508         .master_destroy = i915_master_destroy,
509 #if defined(CONFIG_DEBUG_FS)
510         .debugfs_init = i915_debugfs_init,
511         .debugfs_cleanup = i915_debugfs_cleanup,
512 #endif
513         .gem_init_object = i915_gem_init_object,
514         .gem_free_object = i915_gem_free_object,
515         .gem_vm_ops = &i915_gem_vm_ops,
516         .ioctls = i915_ioctls,
517         .fops = {
518                  .owner = THIS_MODULE,
519                  .open = drm_open,
520                  .release = drm_release,
521                  .unlocked_ioctl = drm_ioctl,
522                  .mmap = drm_gem_mmap,
523                  .poll = drm_poll,
524                  .fasync = drm_fasync,
525                  .read = drm_read,
526 #ifdef CONFIG_COMPAT
527                  .compat_ioctl = i915_compat_ioctl,
528 #endif
529         },
530
531         .pci_driver = {
532                  .name = DRIVER_NAME,
533                  .id_table = pciidlist,
534                  .probe = i915_pci_probe,
535                  .remove = i915_pci_remove,
536                  .driver.pm = &i915_pm_ops,
537         },
538
539         .name = DRIVER_NAME,
540         .desc = DRIVER_DESC,
541         .date = DRIVER_DATE,
542         .major = DRIVER_MAJOR,
543         .minor = DRIVER_MINOR,
544         .patchlevel = DRIVER_PATCHLEVEL,
545 };
546
547 static int __init i915_init(void)
548 {
549         driver.num_ioctls = i915_max_ioctl;
550
551         i915_gem_shrinker_init();
552
553         /*
554          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
555          * explicitly disabled with the module pararmeter.
556          *
557          * Otherwise, just follow the parameter (defaulting to off).
558          *
559          * Allow optional vga_text_mode_force boot option to override
560          * the default behavior.
561          */
562 #if defined(CONFIG_DRM_I915_KMS)
563         if (i915_modeset != 0)
564                 driver.driver_features |= DRIVER_MODESET;
565 #endif
566         if (i915_modeset == 1)
567                 driver.driver_features |= DRIVER_MODESET;
568
569 #ifdef CONFIG_VGA_CONSOLE
570         if (vgacon_text_force() && i915_modeset == -1)
571                 driver.driver_features &= ~DRIVER_MODESET;
572 #endif
573
574         return drm_init(&driver);
575 }
576
577 static void __exit i915_exit(void)
578 {
579         i915_gem_shrinker_exit();
580         drm_exit(&driver);
581 }
582
583 module_init(i915_init);
584 module_exit(i915_exit);
585
586 MODULE_AUTHOR(DRIVER_AUTHOR);
587 MODULE_DESCRIPTION(DRIVER_DESC);
588 MODULE_LICENSE("GPL and additional rights");