agp/intel: Remove confusion of stolen entries not stolen memory
[linux-2.6.git] / drivers / gpu / drm / i915 / i915_dma.c
1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
2  */
3 /*
4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
5  * All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
10  * without limitation the rights to use, copy, modify, merge, publish,
11  * distribute, sub license, and/or sell copies of the Software, and to
12  * permit persons to whom the Software is furnished to do so, subject to
13  * the following conditions:
14  *
15  * The above copyright notice and this permission notice (including the
16  * next paragraph) shall be included in all copies or substantial portions
17  * of the Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26  *
27  */
28
29 #include "drmP.h"
30 #include "drm.h"
31 #include "drm_crtc_helper.h"
32 #include "drm_fb_helper.h"
33 #include "intel_drv.h"
34 #include "i915_drm.h"
35 #include "i915_drv.h"
36 #include "i915_trace.h"
37 #include <linux/pci.h>
38 #include <linux/vgaarb.h>
39 #include <linux/acpi.h>
40 #include <linux/pnp.h>
41 #include <linux/vga_switcheroo.h>
42 #include <linux/slab.h>
43 #include <acpi/video.h>
44
45 /**
46  * Sets up the hardware status page for devices that need a physical address
47  * in the register.
48  */
49 static int i915_init_phys_hws(struct drm_device *dev)
50 {
51         drm_i915_private_t *dev_priv = dev->dev_private;
52         /* Program Hardware Status Page */
53         dev_priv->status_page_dmah =
54                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
55
56         if (!dev_priv->status_page_dmah) {
57                 DRM_ERROR("Can not allocate hardware status page\n");
58                 return -ENOMEM;
59         }
60         dev_priv->render_ring.status_page.page_addr
61                 = dev_priv->status_page_dmah->vaddr;
62         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
63
64         memset(dev_priv->render_ring.status_page.page_addr, 0, PAGE_SIZE);
65
66         if (INTEL_INFO(dev)->gen >= 4)
67                 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
68                                              0xf0;
69
70         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
71         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
72         return 0;
73 }
74
75 /**
76  * Frees the hardware status page, whether it's a physical address or a virtual
77  * address set up by the X Server.
78  */
79 static void i915_free_hws(struct drm_device *dev)
80 {
81         drm_i915_private_t *dev_priv = dev->dev_private;
82         if (dev_priv->status_page_dmah) {
83                 drm_pci_free(dev, dev_priv->status_page_dmah);
84                 dev_priv->status_page_dmah = NULL;
85         }
86
87         if (dev_priv->render_ring.status_page.gfx_addr) {
88                 dev_priv->render_ring.status_page.gfx_addr = 0;
89                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
90         }
91
92         /* Need to rewrite hardware status page */
93         I915_WRITE(HWS_PGA, 0x1ffff000);
94 }
95
96 void i915_kernel_lost_context(struct drm_device * dev)
97 {
98         drm_i915_private_t *dev_priv = dev->dev_private;
99         struct drm_i915_master_private *master_priv;
100         struct intel_ring_buffer *ring = &dev_priv->render_ring;
101
102         /*
103          * We should never lose context on the ring with modesetting
104          * as we don't expose it to userspace
105          */
106         if (drm_core_check_feature(dev, DRIVER_MODESET))
107                 return;
108
109         ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
110         ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
111         ring->space = ring->head - (ring->tail + 8);
112         if (ring->space < 0)
113                 ring->space += ring->size;
114
115         if (!dev->primary->master)
116                 return;
117
118         master_priv = dev->primary->master->driver_priv;
119         if (ring->head == ring->tail && master_priv->sarea_priv)
120                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
121 }
122
123 static int i915_dma_cleanup(struct drm_device * dev)
124 {
125         drm_i915_private_t *dev_priv = dev->dev_private;
126         /* Make sure interrupts are disabled here because the uninstall ioctl
127          * may not have been called from userspace and after dev_private
128          * is freed, it's too late.
129          */
130         if (dev->irq_enabled)
131                 drm_irq_uninstall(dev);
132
133         mutex_lock(&dev->struct_mutex);
134         intel_cleanup_ring_buffer(&dev_priv->render_ring);
135         intel_cleanup_ring_buffer(&dev_priv->bsd_ring);
136         intel_cleanup_ring_buffer(&dev_priv->blt_ring);
137         mutex_unlock(&dev->struct_mutex);
138
139         /* Clear the HWS virtual address at teardown */
140         if (I915_NEED_GFX_HWS(dev))
141                 i915_free_hws(dev);
142
143         return 0;
144 }
145
146 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
147 {
148         drm_i915_private_t *dev_priv = dev->dev_private;
149         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
150
151         master_priv->sarea = drm_getsarea(dev);
152         if (master_priv->sarea) {
153                 master_priv->sarea_priv = (drm_i915_sarea_t *)
154                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
155         } else {
156                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
157         }
158
159         if (init->ring_size != 0) {
160                 if (dev_priv->render_ring.gem_object != NULL) {
161                         i915_dma_cleanup(dev);
162                         DRM_ERROR("Client tried to initialize ringbuffer in "
163                                   "GEM mode\n");
164                         return -EINVAL;
165                 }
166
167                 dev_priv->render_ring.size = init->ring_size;
168
169                 dev_priv->render_ring.map.offset = init->ring_start;
170                 dev_priv->render_ring.map.size = init->ring_size;
171                 dev_priv->render_ring.map.type = 0;
172                 dev_priv->render_ring.map.flags = 0;
173                 dev_priv->render_ring.map.mtrr = 0;
174
175                 drm_core_ioremap_wc(&dev_priv->render_ring.map, dev);
176
177                 if (dev_priv->render_ring.map.handle == NULL) {
178                         i915_dma_cleanup(dev);
179                         DRM_ERROR("can not ioremap virtual address for"
180                                   " ring buffer\n");
181                         return -ENOMEM;
182                 }
183         }
184
185         dev_priv->render_ring.virtual_start = dev_priv->render_ring.map.handle;
186
187         dev_priv->cpp = init->cpp;
188         dev_priv->back_offset = init->back_offset;
189         dev_priv->front_offset = init->front_offset;
190         dev_priv->current_page = 0;
191         if (master_priv->sarea_priv)
192                 master_priv->sarea_priv->pf_current_page = 0;
193
194         /* Allow hardware batchbuffers unless told otherwise.
195          */
196         dev_priv->allow_batchbuffer = 1;
197
198         return 0;
199 }
200
201 static int i915_dma_resume(struct drm_device * dev)
202 {
203         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
204
205         struct intel_ring_buffer *ring;
206         DRM_DEBUG_DRIVER("%s\n", __func__);
207
208         ring = &dev_priv->render_ring;
209
210         if (ring->map.handle == NULL) {
211                 DRM_ERROR("can not ioremap virtual address for"
212                           " ring buffer\n");
213                 return -ENOMEM;
214         }
215
216         /* Program Hardware Status Page */
217         if (!ring->status_page.page_addr) {
218                 DRM_ERROR("Can not find hardware status page\n");
219                 return -EINVAL;
220         }
221         DRM_DEBUG_DRIVER("hw status page @ %p\n",
222                                 ring->status_page.page_addr);
223         if (ring->status_page.gfx_addr != 0)
224                 intel_ring_setup_status_page(ring);
225         else
226                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
227
228         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
229
230         return 0;
231 }
232
233 static int i915_dma_init(struct drm_device *dev, void *data,
234                          struct drm_file *file_priv)
235 {
236         drm_i915_init_t *init = data;
237         int retcode = 0;
238
239         switch (init->func) {
240         case I915_INIT_DMA:
241                 retcode = i915_initialize(dev, init);
242                 break;
243         case I915_CLEANUP_DMA:
244                 retcode = i915_dma_cleanup(dev);
245                 break;
246         case I915_RESUME_DMA:
247                 retcode = i915_dma_resume(dev);
248                 break;
249         default:
250                 retcode = -EINVAL;
251                 break;
252         }
253
254         return retcode;
255 }
256
257 /* Implement basically the same security restrictions as hardware does
258  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
259  *
260  * Most of the calculations below involve calculating the size of a
261  * particular instruction.  It's important to get the size right as
262  * that tells us where the next instruction to check is.  Any illegal
263  * instruction detected will be given a size of zero, which is a
264  * signal to abort the rest of the buffer.
265  */
266 static int validate_cmd(int cmd)
267 {
268         switch (((cmd >> 29) & 0x7)) {
269         case 0x0:
270                 switch ((cmd >> 23) & 0x3f) {
271                 case 0x0:
272                         return 1;       /* MI_NOOP */
273                 case 0x4:
274                         return 1;       /* MI_FLUSH */
275                 default:
276                         return 0;       /* disallow everything else */
277                 }
278                 break;
279         case 0x1:
280                 return 0;       /* reserved */
281         case 0x2:
282                 return (cmd & 0xff) + 2;        /* 2d commands */
283         case 0x3:
284                 if (((cmd >> 24) & 0x1f) <= 0x18)
285                         return 1;
286
287                 switch ((cmd >> 24) & 0x1f) {
288                 case 0x1c:
289                         return 1;
290                 case 0x1d:
291                         switch ((cmd >> 16) & 0xff) {
292                         case 0x3:
293                                 return (cmd & 0x1f) + 2;
294                         case 0x4:
295                                 return (cmd & 0xf) + 2;
296                         default:
297                                 return (cmd & 0xffff) + 2;
298                         }
299                 case 0x1e:
300                         if (cmd & (1 << 23))
301                                 return (cmd & 0xffff) + 1;
302                         else
303                                 return 1;
304                 case 0x1f:
305                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
306                                 return (cmd & 0x1ffff) + 2;
307                         else if (cmd & (1 << 17))       /* indirect random */
308                                 if ((cmd & 0xffff) == 0)
309                                         return 0;       /* unknown length, too hard */
310                                 else
311                                         return (((cmd & 0xffff) + 1) / 2) + 1;
312                         else
313                                 return 2;       /* indirect sequential */
314                 default:
315                         return 0;
316                 }
317         default:
318                 return 0;
319         }
320
321         return 0;
322 }
323
324 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
325 {
326         drm_i915_private_t *dev_priv = dev->dev_private;
327         int i, ret;
328
329         if ((dwords+1) * sizeof(int) >= dev_priv->render_ring.size - 8)
330                 return -EINVAL;
331
332         for (i = 0; i < dwords;) {
333                 int sz = validate_cmd(buffer[i]);
334                 if (sz == 0 || i + sz > dwords)
335                         return -EINVAL;
336                 i += sz;
337         }
338
339         ret = BEGIN_LP_RING((dwords+1)&~1);
340         if (ret)
341                 return ret;
342
343         for (i = 0; i < dwords; i++)
344                 OUT_RING(buffer[i]);
345         if (dwords & 1)
346                 OUT_RING(0);
347
348         ADVANCE_LP_RING();
349
350         return 0;
351 }
352
353 int
354 i915_emit_box(struct drm_device *dev,
355               struct drm_clip_rect *boxes,
356               int i, int DR1, int DR4)
357 {
358         struct drm_i915_private *dev_priv = dev->dev_private;
359         struct drm_clip_rect box = boxes[i];
360         int ret;
361
362         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
363                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
364                           box.x1, box.y1, box.x2, box.y2);
365                 return -EINVAL;
366         }
367
368         if (INTEL_INFO(dev)->gen >= 4) {
369                 ret = BEGIN_LP_RING(4);
370                 if (ret)
371                         return ret;
372
373                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
374                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
375                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
376                 OUT_RING(DR4);
377         } else {
378                 ret = BEGIN_LP_RING(6);
379                 if (ret)
380                         return ret;
381
382                 OUT_RING(GFX_OP_DRAWRECT_INFO);
383                 OUT_RING(DR1);
384                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
385                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
386                 OUT_RING(DR4);
387                 OUT_RING(0);
388         }
389         ADVANCE_LP_RING();
390
391         return 0;
392 }
393
394 /* XXX: Emitting the counter should really be moved to part of the IRQ
395  * emit. For now, do it in both places:
396  */
397
398 static void i915_emit_breadcrumb(struct drm_device *dev)
399 {
400         drm_i915_private_t *dev_priv = dev->dev_private;
401         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
402
403         dev_priv->counter++;
404         if (dev_priv->counter > 0x7FFFFFFFUL)
405                 dev_priv->counter = 0;
406         if (master_priv->sarea_priv)
407                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
408
409         if (BEGIN_LP_RING(4) == 0) {
410                 OUT_RING(MI_STORE_DWORD_INDEX);
411                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
412                 OUT_RING(dev_priv->counter);
413                 OUT_RING(0);
414                 ADVANCE_LP_RING();
415         }
416 }
417
418 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
419                                    drm_i915_cmdbuffer_t *cmd,
420                                    struct drm_clip_rect *cliprects,
421                                    void *cmdbuf)
422 {
423         int nbox = cmd->num_cliprects;
424         int i = 0, count, ret;
425
426         if (cmd->sz & 0x3) {
427                 DRM_ERROR("alignment");
428                 return -EINVAL;
429         }
430
431         i915_kernel_lost_context(dev);
432
433         count = nbox ? nbox : 1;
434
435         for (i = 0; i < count; i++) {
436                 if (i < nbox) {
437                         ret = i915_emit_box(dev, cliprects, i,
438                                             cmd->DR1, cmd->DR4);
439                         if (ret)
440                                 return ret;
441                 }
442
443                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
444                 if (ret)
445                         return ret;
446         }
447
448         i915_emit_breadcrumb(dev);
449         return 0;
450 }
451
452 static int i915_dispatch_batchbuffer(struct drm_device * dev,
453                                      drm_i915_batchbuffer_t * batch,
454                                      struct drm_clip_rect *cliprects)
455 {
456         struct drm_i915_private *dev_priv = dev->dev_private;
457         int nbox = batch->num_cliprects;
458         int i, count, ret;
459
460         if ((batch->start | batch->used) & 0x7) {
461                 DRM_ERROR("alignment");
462                 return -EINVAL;
463         }
464
465         i915_kernel_lost_context(dev);
466
467         count = nbox ? nbox : 1;
468         for (i = 0; i < count; i++) {
469                 if (i < nbox) {
470                         ret = i915_emit_box(dev, cliprects, i,
471                                             batch->DR1, batch->DR4);
472                         if (ret)
473                                 return ret;
474                 }
475
476                 if (!IS_I830(dev) && !IS_845G(dev)) {
477                         ret = BEGIN_LP_RING(2);
478                         if (ret)
479                                 return ret;
480
481                         if (INTEL_INFO(dev)->gen >= 4) {
482                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
483                                 OUT_RING(batch->start);
484                         } else {
485                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
486                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
487                         }
488                 } else {
489                         ret = BEGIN_LP_RING(4);
490                         if (ret)
491                                 return ret;
492
493                         OUT_RING(MI_BATCH_BUFFER);
494                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
495                         OUT_RING(batch->start + batch->used - 4);
496                         OUT_RING(0);
497                 }
498                 ADVANCE_LP_RING();
499         }
500
501
502         if (IS_G4X(dev) || IS_GEN5(dev)) {
503                 if (BEGIN_LP_RING(2) == 0) {
504                         OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
505                         OUT_RING(MI_NOOP);
506                         ADVANCE_LP_RING();
507                 }
508         }
509
510         i915_emit_breadcrumb(dev);
511         return 0;
512 }
513
514 static int i915_dispatch_flip(struct drm_device * dev)
515 {
516         drm_i915_private_t *dev_priv = dev->dev_private;
517         struct drm_i915_master_private *master_priv =
518                 dev->primary->master->driver_priv;
519         int ret;
520
521         if (!master_priv->sarea_priv)
522                 return -EINVAL;
523
524         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
525                           __func__,
526                          dev_priv->current_page,
527                          master_priv->sarea_priv->pf_current_page);
528
529         i915_kernel_lost_context(dev);
530
531         ret = BEGIN_LP_RING(10);
532         if (ret)
533                 return ret;
534
535         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
536         OUT_RING(0);
537
538         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
539         OUT_RING(0);
540         if (dev_priv->current_page == 0) {
541                 OUT_RING(dev_priv->back_offset);
542                 dev_priv->current_page = 1;
543         } else {
544                 OUT_RING(dev_priv->front_offset);
545                 dev_priv->current_page = 0;
546         }
547         OUT_RING(0);
548
549         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
550         OUT_RING(0);
551
552         ADVANCE_LP_RING();
553
554         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
555
556         if (BEGIN_LP_RING(4) == 0) {
557                 OUT_RING(MI_STORE_DWORD_INDEX);
558                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
559                 OUT_RING(dev_priv->counter);
560                 OUT_RING(0);
561                 ADVANCE_LP_RING();
562         }
563
564         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
565         return 0;
566 }
567
568 static int i915_quiescent(struct drm_device * dev)
569 {
570         drm_i915_private_t *dev_priv = dev->dev_private;
571
572         i915_kernel_lost_context(dev);
573         return intel_wait_ring_buffer(&dev_priv->render_ring,
574                                       dev_priv->render_ring.size - 8);
575 }
576
577 static int i915_flush_ioctl(struct drm_device *dev, void *data,
578                             struct drm_file *file_priv)
579 {
580         int ret;
581
582         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
583
584         mutex_lock(&dev->struct_mutex);
585         ret = i915_quiescent(dev);
586         mutex_unlock(&dev->struct_mutex);
587
588         return ret;
589 }
590
591 static int i915_batchbuffer(struct drm_device *dev, void *data,
592                             struct drm_file *file_priv)
593 {
594         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
595         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
596         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
597             master_priv->sarea_priv;
598         drm_i915_batchbuffer_t *batch = data;
599         int ret;
600         struct drm_clip_rect *cliprects = NULL;
601
602         if (!dev_priv->allow_batchbuffer) {
603                 DRM_ERROR("Batchbuffer ioctl disabled\n");
604                 return -EINVAL;
605         }
606
607         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
608                         batch->start, batch->used, batch->num_cliprects);
609
610         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
611
612         if (batch->num_cliprects < 0)
613                 return -EINVAL;
614
615         if (batch->num_cliprects) {
616                 cliprects = kcalloc(batch->num_cliprects,
617                                     sizeof(struct drm_clip_rect),
618                                     GFP_KERNEL);
619                 if (cliprects == NULL)
620                         return -ENOMEM;
621
622                 ret = copy_from_user(cliprects, batch->cliprects,
623                                      batch->num_cliprects *
624                                      sizeof(struct drm_clip_rect));
625                 if (ret != 0) {
626                         ret = -EFAULT;
627                         goto fail_free;
628                 }
629         }
630
631         mutex_lock(&dev->struct_mutex);
632         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
633         mutex_unlock(&dev->struct_mutex);
634
635         if (sarea_priv)
636                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
637
638 fail_free:
639         kfree(cliprects);
640
641         return ret;
642 }
643
644 static int i915_cmdbuffer(struct drm_device *dev, void *data,
645                           struct drm_file *file_priv)
646 {
647         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
648         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
649         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
650             master_priv->sarea_priv;
651         drm_i915_cmdbuffer_t *cmdbuf = data;
652         struct drm_clip_rect *cliprects = NULL;
653         void *batch_data;
654         int ret;
655
656         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
657                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
658
659         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
660
661         if (cmdbuf->num_cliprects < 0)
662                 return -EINVAL;
663
664         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
665         if (batch_data == NULL)
666                 return -ENOMEM;
667
668         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
669         if (ret != 0) {
670                 ret = -EFAULT;
671                 goto fail_batch_free;
672         }
673
674         if (cmdbuf->num_cliprects) {
675                 cliprects = kcalloc(cmdbuf->num_cliprects,
676                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
677                 if (cliprects == NULL) {
678                         ret = -ENOMEM;
679                         goto fail_batch_free;
680                 }
681
682                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
683                                      cmdbuf->num_cliprects *
684                                      sizeof(struct drm_clip_rect));
685                 if (ret != 0) {
686                         ret = -EFAULT;
687                         goto fail_clip_free;
688                 }
689         }
690
691         mutex_lock(&dev->struct_mutex);
692         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
693         mutex_unlock(&dev->struct_mutex);
694         if (ret) {
695                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
696                 goto fail_clip_free;
697         }
698
699         if (sarea_priv)
700                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
701
702 fail_clip_free:
703         kfree(cliprects);
704 fail_batch_free:
705         kfree(batch_data);
706
707         return ret;
708 }
709
710 static int i915_flip_bufs(struct drm_device *dev, void *data,
711                           struct drm_file *file_priv)
712 {
713         int ret;
714
715         DRM_DEBUG_DRIVER("%s\n", __func__);
716
717         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
718
719         mutex_lock(&dev->struct_mutex);
720         ret = i915_dispatch_flip(dev);
721         mutex_unlock(&dev->struct_mutex);
722
723         return ret;
724 }
725
726 static int i915_getparam(struct drm_device *dev, void *data,
727                          struct drm_file *file_priv)
728 {
729         drm_i915_private_t *dev_priv = dev->dev_private;
730         drm_i915_getparam_t *param = data;
731         int value;
732
733         if (!dev_priv) {
734                 DRM_ERROR("called with no initialization\n");
735                 return -EINVAL;
736         }
737
738         switch (param->param) {
739         case I915_PARAM_IRQ_ACTIVE:
740                 value = dev->pdev->irq ? 1 : 0;
741                 break;
742         case I915_PARAM_ALLOW_BATCHBUFFER:
743                 value = dev_priv->allow_batchbuffer ? 1 : 0;
744                 break;
745         case I915_PARAM_LAST_DISPATCH:
746                 value = READ_BREADCRUMB(dev_priv);
747                 break;
748         case I915_PARAM_CHIPSET_ID:
749                 value = dev->pci_device;
750                 break;
751         case I915_PARAM_HAS_GEM:
752                 value = dev_priv->has_gem;
753                 break;
754         case I915_PARAM_NUM_FENCES_AVAIL:
755                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
756                 break;
757         case I915_PARAM_HAS_OVERLAY:
758                 value = dev_priv->overlay ? 1 : 0;
759                 break;
760         case I915_PARAM_HAS_PAGEFLIPPING:
761                 value = 1;
762                 break;
763         case I915_PARAM_HAS_EXECBUF2:
764                 /* depends on GEM */
765                 value = dev_priv->has_gem;
766                 break;
767         case I915_PARAM_HAS_BSD:
768                 value = HAS_BSD(dev);
769                 break;
770         case I915_PARAM_HAS_BLT:
771                 value = HAS_BLT(dev);
772                 break;
773         case I915_PARAM_HAS_RELAXED_FENCING:
774                 value = 1;
775                 break;
776         default:
777                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
778                                  param->param);
779                 return -EINVAL;
780         }
781
782         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
783                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
784                 return -EFAULT;
785         }
786
787         return 0;
788 }
789
790 static int i915_setparam(struct drm_device *dev, void *data,
791                          struct drm_file *file_priv)
792 {
793         drm_i915_private_t *dev_priv = dev->dev_private;
794         drm_i915_setparam_t *param = data;
795
796         if (!dev_priv) {
797                 DRM_ERROR("called with no initialization\n");
798                 return -EINVAL;
799         }
800
801         switch (param->param) {
802         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
803                 break;
804         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
805                 dev_priv->tex_lru_log_granularity = param->value;
806                 break;
807         case I915_SETPARAM_ALLOW_BATCHBUFFER:
808                 dev_priv->allow_batchbuffer = param->value;
809                 break;
810         case I915_SETPARAM_NUM_USED_FENCES:
811                 if (param->value > dev_priv->num_fence_regs ||
812                     param->value < 0)
813                         return -EINVAL;
814                 /* Userspace can use first N regs */
815                 dev_priv->fence_reg_start = param->value;
816                 break;
817         default:
818                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
819                                         param->param);
820                 return -EINVAL;
821         }
822
823         return 0;
824 }
825
826 static int i915_set_status_page(struct drm_device *dev, void *data,
827                                 struct drm_file *file_priv)
828 {
829         drm_i915_private_t *dev_priv = dev->dev_private;
830         drm_i915_hws_addr_t *hws = data;
831         struct intel_ring_buffer *ring = &dev_priv->render_ring;
832
833         if (!I915_NEED_GFX_HWS(dev))
834                 return -EINVAL;
835
836         if (!dev_priv) {
837                 DRM_ERROR("called with no initialization\n");
838                 return -EINVAL;
839         }
840
841         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
842                 WARN(1, "tried to set status page when mode setting active\n");
843                 return 0;
844         }
845
846         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
847
848         ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
849
850         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
851         dev_priv->hws_map.size = 4*1024;
852         dev_priv->hws_map.type = 0;
853         dev_priv->hws_map.flags = 0;
854         dev_priv->hws_map.mtrr = 0;
855
856         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
857         if (dev_priv->hws_map.handle == NULL) {
858                 i915_dma_cleanup(dev);
859                 ring->status_page.gfx_addr = 0;
860                 DRM_ERROR("can not ioremap virtual address for"
861                                 " G33 hw status page\n");
862                 return -ENOMEM;
863         }
864         ring->status_page.page_addr = dev_priv->hws_map.handle;
865         memset(ring->status_page.page_addr, 0, PAGE_SIZE);
866         I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
867
868         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
869                          ring->status_page.gfx_addr);
870         DRM_DEBUG_DRIVER("load hws at %p\n",
871                          ring->status_page.page_addr);
872         return 0;
873 }
874
875 static int i915_get_bridge_dev(struct drm_device *dev)
876 {
877         struct drm_i915_private *dev_priv = dev->dev_private;
878
879         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
880         if (!dev_priv->bridge_dev) {
881                 DRM_ERROR("bridge device not found\n");
882                 return -1;
883         }
884         return 0;
885 }
886
887 #define MCHBAR_I915 0x44
888 #define MCHBAR_I965 0x48
889 #define MCHBAR_SIZE (4*4096)
890
891 #define DEVEN_REG 0x54
892 #define   DEVEN_MCHBAR_EN (1 << 28)
893
894 /* Allocate space for the MCH regs if needed, return nonzero on error */
895 static int
896 intel_alloc_mchbar_resource(struct drm_device *dev)
897 {
898         drm_i915_private_t *dev_priv = dev->dev_private;
899         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
900         u32 temp_lo, temp_hi = 0;
901         u64 mchbar_addr;
902         int ret;
903
904         if (INTEL_INFO(dev)->gen >= 4)
905                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
906         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
907         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
908
909         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
910 #ifdef CONFIG_PNP
911         if (mchbar_addr &&
912             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
913                 return 0;
914 #endif
915
916         /* Get some space for it */
917         dev_priv->mch_res.name = "i915 MCHBAR";
918         dev_priv->mch_res.flags = IORESOURCE_MEM;
919         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
920                                      &dev_priv->mch_res,
921                                      MCHBAR_SIZE, MCHBAR_SIZE,
922                                      PCIBIOS_MIN_MEM,
923                                      0, pcibios_align_resource,
924                                      dev_priv->bridge_dev);
925         if (ret) {
926                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
927                 dev_priv->mch_res.start = 0;
928                 return ret;
929         }
930
931         if (INTEL_INFO(dev)->gen >= 4)
932                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
933                                        upper_32_bits(dev_priv->mch_res.start));
934
935         pci_write_config_dword(dev_priv->bridge_dev, reg,
936                                lower_32_bits(dev_priv->mch_res.start));
937         return 0;
938 }
939
940 /* Setup MCHBAR if possible, return true if we should disable it again */
941 static void
942 intel_setup_mchbar(struct drm_device *dev)
943 {
944         drm_i915_private_t *dev_priv = dev->dev_private;
945         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
946         u32 temp;
947         bool enabled;
948
949         dev_priv->mchbar_need_disable = false;
950
951         if (IS_I915G(dev) || IS_I915GM(dev)) {
952                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
953                 enabled = !!(temp & DEVEN_MCHBAR_EN);
954         } else {
955                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
956                 enabled = temp & 1;
957         }
958
959         /* If it's already enabled, don't have to do anything */
960         if (enabled)
961                 return;
962
963         if (intel_alloc_mchbar_resource(dev))
964                 return;
965
966         dev_priv->mchbar_need_disable = true;
967
968         /* Space is allocated or reserved, so enable it. */
969         if (IS_I915G(dev) || IS_I915GM(dev)) {
970                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
971                                        temp | DEVEN_MCHBAR_EN);
972         } else {
973                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
974                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
975         }
976 }
977
978 static void
979 intel_teardown_mchbar(struct drm_device *dev)
980 {
981         drm_i915_private_t *dev_priv = dev->dev_private;
982         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
983         u32 temp;
984
985         if (dev_priv->mchbar_need_disable) {
986                 if (IS_I915G(dev) || IS_I915GM(dev)) {
987                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
988                         temp &= ~DEVEN_MCHBAR_EN;
989                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
990                 } else {
991                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
992                         temp &= ~1;
993                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
994                 }
995         }
996
997         if (dev_priv->mch_res.start)
998                 release_resource(&dev_priv->mch_res);
999 }
1000
1001 #define PTE_ADDRESS_MASK                0xfffff000
1002 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1003 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1004 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1005 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1006 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1007 #define PTE_VALID                       (1 << 0)
1008
1009 /**
1010  * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1011  *                       a physical one
1012  * @dev: drm device
1013  * @offset: address to translate
1014  *
1015  * Some chip functions require allocations from stolen space and need the
1016  * physical address of the memory in question.
1017  */
1018 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1019 {
1020         struct drm_i915_private *dev_priv = dev->dev_private;
1021         struct pci_dev *pdev = dev_priv->bridge_dev;
1022         u32 base;
1023
1024 #if 0
1025         /* On the machines I have tested the Graphics Base of Stolen Memory
1026          * is unreliable, so compute the base by subtracting the stolen memory
1027          * from the Top of Low Usable DRAM which is where the BIOS places
1028          * the graphics stolen memory.
1029          */
1030         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1031                 /* top 32bits are reserved = 0 */
1032                 pci_read_config_dword(pdev, 0xA4, &base);
1033         } else {
1034                 /* XXX presume 8xx is the same as i915 */
1035                 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1036         }
1037 #else
1038         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1039                 u16 val;
1040                 pci_read_config_word(pdev, 0xb0, &val);
1041                 base = val >> 4 << 20;
1042         } else {
1043                 u8 val;
1044                 pci_read_config_byte(pdev, 0x9c, &val);
1045                 base = val >> 3 << 27;
1046         }
1047         base -= dev_priv->mm.gtt->stolen_size;
1048 #endif
1049
1050         return base + offset;
1051 }
1052
1053 static void i915_warn_stolen(struct drm_device *dev)
1054 {
1055         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1056         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1057 }
1058
1059 static void i915_setup_compression(struct drm_device *dev, int size)
1060 {
1061         struct drm_i915_private *dev_priv = dev->dev_private;
1062         struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1063         unsigned long cfb_base;
1064         unsigned long ll_base = 0;
1065
1066         compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1067         if (compressed_fb)
1068                 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1069         if (!compressed_fb)
1070                 goto err;
1071
1072         cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1073         if (!cfb_base)
1074                 goto err_fb;
1075
1076         if (!(IS_GM45(dev) || IS_IRONLAKE_M(dev))) {
1077                 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1078                                                     4096, 4096, 0);
1079                 if (compressed_llb)
1080                         compressed_llb = drm_mm_get_block(compressed_llb,
1081                                                           4096, 4096);
1082                 if (!compressed_llb)
1083                         goto err_fb;
1084
1085                 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1086                 if (!ll_base)
1087                         goto err_llb;
1088         }
1089
1090         dev_priv->cfb_size = size;
1091
1092         intel_disable_fbc(dev);
1093         dev_priv->compressed_fb = compressed_fb;
1094         if (IS_IRONLAKE_M(dev))
1095                 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1096         else if (IS_GM45(dev)) {
1097                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1098         } else {
1099                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1100                 I915_WRITE(FBC_LL_BASE, ll_base);
1101                 dev_priv->compressed_llb = compressed_llb;
1102         }
1103
1104         DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1105                       cfb_base, ll_base, size >> 20);
1106         return;
1107
1108 err_llb:
1109         drm_mm_put_block(compressed_llb);
1110 err_fb:
1111         drm_mm_put_block(compressed_fb);
1112 err:
1113         dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1114         i915_warn_stolen(dev);
1115 }
1116
1117 static void i915_cleanup_compression(struct drm_device *dev)
1118 {
1119         struct drm_i915_private *dev_priv = dev->dev_private;
1120
1121         drm_mm_put_block(dev_priv->compressed_fb);
1122         if (dev_priv->compressed_llb)
1123                 drm_mm_put_block(dev_priv->compressed_llb);
1124 }
1125
1126 /* true = enable decode, false = disable decoder */
1127 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1128 {
1129         struct drm_device *dev = cookie;
1130
1131         intel_modeset_vga_set_state(dev, state);
1132         if (state)
1133                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1134                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1135         else
1136                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1137 }
1138
1139 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1140 {
1141         struct drm_device *dev = pci_get_drvdata(pdev);
1142         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1143         if (state == VGA_SWITCHEROO_ON) {
1144                 printk(KERN_INFO "i915: switched on\n");
1145                 /* i915 resume handler doesn't set to D0 */
1146                 pci_set_power_state(dev->pdev, PCI_D0);
1147                 i915_resume(dev);
1148         } else {
1149                 printk(KERN_ERR "i915: switched off\n");
1150                 i915_suspend(dev, pmm);
1151         }
1152 }
1153
1154 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1155 {
1156         struct drm_device *dev = pci_get_drvdata(pdev);
1157         bool can_switch;
1158
1159         spin_lock(&dev->count_lock);
1160         can_switch = (dev->open_count == 0);
1161         spin_unlock(&dev->count_lock);
1162         return can_switch;
1163 }
1164
1165 static int i915_load_modeset_init(struct drm_device *dev)
1166 {
1167         struct drm_i915_private *dev_priv = dev->dev_private;
1168         unsigned long prealloc_size, gtt_size, mappable_size;
1169         int ret = 0;
1170
1171         prealloc_size = dev_priv->mm.gtt->stolen_size;
1172         gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1173         mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1174
1175         /* Basic memrange allocator for stolen space */
1176         drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1177
1178         /* Let GEM Manage all of the aperture.
1179          *
1180          * However, leave one page at the end still bound to the scratch page.
1181          * There are a number of places where the hardware apparently
1182          * prefetches past the end of the object, and we've seen multiple
1183          * hangs with the GPU head pointer stuck in a batchbuffer bound
1184          * at the last page of the aperture.  One page should be enough to
1185          * keep any prefetching inside of the aperture.
1186          */
1187         i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1188
1189         mutex_lock(&dev->struct_mutex);
1190         ret = i915_gem_init_ringbuffer(dev);
1191         mutex_unlock(&dev->struct_mutex);
1192         if (ret)
1193                 goto out;
1194
1195         /* Try to set up FBC with a reasonable compressed buffer size */
1196         if (I915_HAS_FBC(dev) && i915_powersave) {
1197                 int cfb_size;
1198
1199                 /* Leave 1M for line length buffer & misc. */
1200
1201                 /* Try to get a 32M buffer... */
1202                 if (prealloc_size > (36*1024*1024))
1203                         cfb_size = 32*1024*1024;
1204                 else /* fall back to 7/8 of the stolen space */
1205                         cfb_size = prealloc_size * 7 / 8;
1206                 i915_setup_compression(dev, cfb_size);
1207         }
1208
1209         /* Allow hardware batchbuffers unless told otherwise. */
1210         dev_priv->allow_batchbuffer = 1;
1211
1212         ret = intel_parse_bios(dev);
1213         if (ret)
1214                 DRM_INFO("failed to find VBIOS tables\n");
1215
1216         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1217         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1218         if (ret)
1219                 goto cleanup_ringbuffer;
1220
1221         intel_register_dsm_handler();
1222
1223         ret = vga_switcheroo_register_client(dev->pdev,
1224                                              i915_switcheroo_set_state,
1225                                              i915_switcheroo_can_switch);
1226         if (ret)
1227                 goto cleanup_vga_client;
1228
1229         /* IIR "flip pending" bit means done if this bit is set */
1230         if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1231                 dev_priv->flip_pending_is_done = true;
1232
1233         intel_modeset_init(dev);
1234
1235         ret = drm_irq_install(dev);
1236         if (ret)
1237                 goto cleanup_vga_switcheroo;
1238
1239         /* Always safe in the mode setting case. */
1240         /* FIXME: do pre/post-mode set stuff in core KMS code */
1241         dev->vblank_disable_allowed = 1;
1242
1243         ret = intel_fbdev_init(dev);
1244         if (ret)
1245                 goto cleanup_irq;
1246
1247         drm_kms_helper_poll_init(dev);
1248
1249         /* We're off and running w/KMS */
1250         dev_priv->mm.suspended = 0;
1251
1252         return 0;
1253
1254 cleanup_irq:
1255         drm_irq_uninstall(dev);
1256 cleanup_vga_switcheroo:
1257         vga_switcheroo_unregister_client(dev->pdev);
1258 cleanup_vga_client:
1259         vga_client_register(dev->pdev, NULL, NULL, NULL);
1260 cleanup_ringbuffer:
1261         mutex_lock(&dev->struct_mutex);
1262         i915_gem_cleanup_ringbuffer(dev);
1263         mutex_unlock(&dev->struct_mutex);
1264 out:
1265         return ret;
1266 }
1267
1268 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1269 {
1270         struct drm_i915_master_private *master_priv;
1271
1272         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1273         if (!master_priv)
1274                 return -ENOMEM;
1275
1276         master->driver_priv = master_priv;
1277         return 0;
1278 }
1279
1280 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1281 {
1282         struct drm_i915_master_private *master_priv = master->driver_priv;
1283
1284         if (!master_priv)
1285                 return;
1286
1287         kfree(master_priv);
1288
1289         master->driver_priv = NULL;
1290 }
1291
1292 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1293 {
1294         drm_i915_private_t *dev_priv = dev->dev_private;
1295         u32 tmp;
1296
1297         tmp = I915_READ(CLKCFG);
1298
1299         switch (tmp & CLKCFG_FSB_MASK) {
1300         case CLKCFG_FSB_533:
1301                 dev_priv->fsb_freq = 533; /* 133*4 */
1302                 break;
1303         case CLKCFG_FSB_800:
1304                 dev_priv->fsb_freq = 800; /* 200*4 */
1305                 break;
1306         case CLKCFG_FSB_667:
1307                 dev_priv->fsb_freq =  667; /* 167*4 */
1308                 break;
1309         case CLKCFG_FSB_400:
1310                 dev_priv->fsb_freq = 400; /* 100*4 */
1311                 break;
1312         }
1313
1314         switch (tmp & CLKCFG_MEM_MASK) {
1315         case CLKCFG_MEM_533:
1316                 dev_priv->mem_freq = 533;
1317                 break;
1318         case CLKCFG_MEM_667:
1319                 dev_priv->mem_freq = 667;
1320                 break;
1321         case CLKCFG_MEM_800:
1322                 dev_priv->mem_freq = 800;
1323                 break;
1324         }
1325
1326         /* detect pineview DDR3 setting */
1327         tmp = I915_READ(CSHRDDR3CTL);
1328         dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1329 }
1330
1331 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1332 {
1333         drm_i915_private_t *dev_priv = dev->dev_private;
1334         u16 ddrpll, csipll;
1335
1336         ddrpll = I915_READ16(DDRMPLL1);
1337         csipll = I915_READ16(CSIPLL0);
1338
1339         switch (ddrpll & 0xff) {
1340         case 0xc:
1341                 dev_priv->mem_freq = 800;
1342                 break;
1343         case 0x10:
1344                 dev_priv->mem_freq = 1066;
1345                 break;
1346         case 0x14:
1347                 dev_priv->mem_freq = 1333;
1348                 break;
1349         case 0x18:
1350                 dev_priv->mem_freq = 1600;
1351                 break;
1352         default:
1353                 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1354                                  ddrpll & 0xff);
1355                 dev_priv->mem_freq = 0;
1356                 break;
1357         }
1358
1359         dev_priv->r_t = dev_priv->mem_freq;
1360
1361         switch (csipll & 0x3ff) {
1362         case 0x00c:
1363                 dev_priv->fsb_freq = 3200;
1364                 break;
1365         case 0x00e:
1366                 dev_priv->fsb_freq = 3733;
1367                 break;
1368         case 0x010:
1369                 dev_priv->fsb_freq = 4266;
1370                 break;
1371         case 0x012:
1372                 dev_priv->fsb_freq = 4800;
1373                 break;
1374         case 0x014:
1375                 dev_priv->fsb_freq = 5333;
1376                 break;
1377         case 0x016:
1378                 dev_priv->fsb_freq = 5866;
1379                 break;
1380         case 0x018:
1381                 dev_priv->fsb_freq = 6400;
1382                 break;
1383         default:
1384                 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1385                                  csipll & 0x3ff);
1386                 dev_priv->fsb_freq = 0;
1387                 break;
1388         }
1389
1390         if (dev_priv->fsb_freq == 3200) {
1391                 dev_priv->c_m = 0;
1392         } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1393                 dev_priv->c_m = 1;
1394         } else {
1395                 dev_priv->c_m = 2;
1396         }
1397 }
1398
1399 struct v_table {
1400         u8 vid;
1401         unsigned long vd; /* in .1 mil */
1402         unsigned long vm; /* in .1 mil */
1403         u8 pvid;
1404 };
1405
1406 static struct v_table v_table[] = {
1407         { 0, 16125, 15000, 0x7f, },
1408         { 1, 16000, 14875, 0x7e, },
1409         { 2, 15875, 14750, 0x7d, },
1410         { 3, 15750, 14625, 0x7c, },
1411         { 4, 15625, 14500, 0x7b, },
1412         { 5, 15500, 14375, 0x7a, },
1413         { 6, 15375, 14250, 0x79, },
1414         { 7, 15250, 14125, 0x78, },
1415         { 8, 15125, 14000, 0x77, },
1416         { 9, 15000, 13875, 0x76, },
1417         { 10, 14875, 13750, 0x75, },
1418         { 11, 14750, 13625, 0x74, },
1419         { 12, 14625, 13500, 0x73, },
1420         { 13, 14500, 13375, 0x72, },
1421         { 14, 14375, 13250, 0x71, },
1422         { 15, 14250, 13125, 0x70, },
1423         { 16, 14125, 13000, 0x6f, },
1424         { 17, 14000, 12875, 0x6e, },
1425         { 18, 13875, 12750, 0x6d, },
1426         { 19, 13750, 12625, 0x6c, },
1427         { 20, 13625, 12500, 0x6b, },
1428         { 21, 13500, 12375, 0x6a, },
1429         { 22, 13375, 12250, 0x69, },
1430         { 23, 13250, 12125, 0x68, },
1431         { 24, 13125, 12000, 0x67, },
1432         { 25, 13000, 11875, 0x66, },
1433         { 26, 12875, 11750, 0x65, },
1434         { 27, 12750, 11625, 0x64, },
1435         { 28, 12625, 11500, 0x63, },
1436         { 29, 12500, 11375, 0x62, },
1437         { 30, 12375, 11250, 0x61, },
1438         { 31, 12250, 11125, 0x60, },
1439         { 32, 12125, 11000, 0x5f, },
1440         { 33, 12000, 10875, 0x5e, },
1441         { 34, 11875, 10750, 0x5d, },
1442         { 35, 11750, 10625, 0x5c, },
1443         { 36, 11625, 10500, 0x5b, },
1444         { 37, 11500, 10375, 0x5a, },
1445         { 38, 11375, 10250, 0x59, },
1446         { 39, 11250, 10125, 0x58, },
1447         { 40, 11125, 10000, 0x57, },
1448         { 41, 11000, 9875, 0x56, },
1449         { 42, 10875, 9750, 0x55, },
1450         { 43, 10750, 9625, 0x54, },
1451         { 44, 10625, 9500, 0x53, },
1452         { 45, 10500, 9375, 0x52, },
1453         { 46, 10375, 9250, 0x51, },
1454         { 47, 10250, 9125, 0x50, },
1455         { 48, 10125, 9000, 0x4f, },
1456         { 49, 10000, 8875, 0x4e, },
1457         { 50, 9875, 8750, 0x4d, },
1458         { 51, 9750, 8625, 0x4c, },
1459         { 52, 9625, 8500, 0x4b, },
1460         { 53, 9500, 8375, 0x4a, },
1461         { 54, 9375, 8250, 0x49, },
1462         { 55, 9250, 8125, 0x48, },
1463         { 56, 9125, 8000, 0x47, },
1464         { 57, 9000, 7875, 0x46, },
1465         { 58, 8875, 7750, 0x45, },
1466         { 59, 8750, 7625, 0x44, },
1467         { 60, 8625, 7500, 0x43, },
1468         { 61, 8500, 7375, 0x42, },
1469         { 62, 8375, 7250, 0x41, },
1470         { 63, 8250, 7125, 0x40, },
1471         { 64, 8125, 7000, 0x3f, },
1472         { 65, 8000, 6875, 0x3e, },
1473         { 66, 7875, 6750, 0x3d, },
1474         { 67, 7750, 6625, 0x3c, },
1475         { 68, 7625, 6500, 0x3b, },
1476         { 69, 7500, 6375, 0x3a, },
1477         { 70, 7375, 6250, 0x39, },
1478         { 71, 7250, 6125, 0x38, },
1479         { 72, 7125, 6000, 0x37, },
1480         { 73, 7000, 5875, 0x36, },
1481         { 74, 6875, 5750, 0x35, },
1482         { 75, 6750, 5625, 0x34, },
1483         { 76, 6625, 5500, 0x33, },
1484         { 77, 6500, 5375, 0x32, },
1485         { 78, 6375, 5250, 0x31, },
1486         { 79, 6250, 5125, 0x30, },
1487         { 80, 6125, 5000, 0x2f, },
1488         { 81, 6000, 4875, 0x2e, },
1489         { 82, 5875, 4750, 0x2d, },
1490         { 83, 5750, 4625, 0x2c, },
1491         { 84, 5625, 4500, 0x2b, },
1492         { 85, 5500, 4375, 0x2a, },
1493         { 86, 5375, 4250, 0x29, },
1494         { 87, 5250, 4125, 0x28, },
1495         { 88, 5125, 4000, 0x27, },
1496         { 89, 5000, 3875, 0x26, },
1497         { 90, 4875, 3750, 0x25, },
1498         { 91, 4750, 3625, 0x24, },
1499         { 92, 4625, 3500, 0x23, },
1500         { 93, 4500, 3375, 0x22, },
1501         { 94, 4375, 3250, 0x21, },
1502         { 95, 4250, 3125, 0x20, },
1503         { 96, 4125, 3000, 0x1f, },
1504         { 97, 4125, 3000, 0x1e, },
1505         { 98, 4125, 3000, 0x1d, },
1506         { 99, 4125, 3000, 0x1c, },
1507         { 100, 4125, 3000, 0x1b, },
1508         { 101, 4125, 3000, 0x1a, },
1509         { 102, 4125, 3000, 0x19, },
1510         { 103, 4125, 3000, 0x18, },
1511         { 104, 4125, 3000, 0x17, },
1512         { 105, 4125, 3000, 0x16, },
1513         { 106, 4125, 3000, 0x15, },
1514         { 107, 4125, 3000, 0x14, },
1515         { 108, 4125, 3000, 0x13, },
1516         { 109, 4125, 3000, 0x12, },
1517         { 110, 4125, 3000, 0x11, },
1518         { 111, 4125, 3000, 0x10, },
1519         { 112, 4125, 3000, 0x0f, },
1520         { 113, 4125, 3000, 0x0e, },
1521         { 114, 4125, 3000, 0x0d, },
1522         { 115, 4125, 3000, 0x0c, },
1523         { 116, 4125, 3000, 0x0b, },
1524         { 117, 4125, 3000, 0x0a, },
1525         { 118, 4125, 3000, 0x09, },
1526         { 119, 4125, 3000, 0x08, },
1527         { 120, 1125, 0, 0x07, },
1528         { 121, 1000, 0, 0x06, },
1529         { 122, 875, 0, 0x05, },
1530         { 123, 750, 0, 0x04, },
1531         { 124, 625, 0, 0x03, },
1532         { 125, 500, 0, 0x02, },
1533         { 126, 375, 0, 0x01, },
1534         { 127, 0, 0, 0x00, },
1535 };
1536
1537 struct cparams {
1538         int i;
1539         int t;
1540         int m;
1541         int c;
1542 };
1543
1544 static struct cparams cparams[] = {
1545         { 1, 1333, 301, 28664 },
1546         { 1, 1066, 294, 24460 },
1547         { 1, 800, 294, 25192 },
1548         { 0, 1333, 276, 27605 },
1549         { 0, 1066, 276, 27605 },
1550         { 0, 800, 231, 23784 },
1551 };
1552
1553 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1554 {
1555         u64 total_count, diff, ret;
1556         u32 count1, count2, count3, m = 0, c = 0;
1557         unsigned long now = jiffies_to_msecs(jiffies), diff1;
1558         int i;
1559
1560         diff1 = now - dev_priv->last_time1;
1561
1562         count1 = I915_READ(DMIEC);
1563         count2 = I915_READ(DDREC);
1564         count3 = I915_READ(CSIEC);
1565
1566         total_count = count1 + count2 + count3;
1567
1568         /* FIXME: handle per-counter overflow */
1569         if (total_count < dev_priv->last_count1) {
1570                 diff = ~0UL - dev_priv->last_count1;
1571                 diff += total_count;
1572         } else {
1573                 diff = total_count - dev_priv->last_count1;
1574         }
1575
1576         for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1577                 if (cparams[i].i == dev_priv->c_m &&
1578                     cparams[i].t == dev_priv->r_t) {
1579                         m = cparams[i].m;
1580                         c = cparams[i].c;
1581                         break;
1582                 }
1583         }
1584
1585         diff = div_u64(diff, diff1);
1586         ret = ((m * diff) + c);
1587         ret = div_u64(ret, 10);
1588
1589         dev_priv->last_count1 = total_count;
1590         dev_priv->last_time1 = now;
1591
1592         return ret;
1593 }
1594
1595 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1596 {
1597         unsigned long m, x, b;
1598         u32 tsfs;
1599
1600         tsfs = I915_READ(TSFS);
1601
1602         m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1603         x = I915_READ8(TR1);
1604
1605         b = tsfs & TSFS_INTR_MASK;
1606
1607         return ((m * x) / 127) - b;
1608 }
1609
1610 static unsigned long pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1611 {
1612         unsigned long val = 0;
1613         int i;
1614
1615         for (i = 0; i < ARRAY_SIZE(v_table); i++) {
1616                 if (v_table[i].pvid == pxvid) {
1617                         if (IS_MOBILE(dev_priv->dev))
1618                                 val = v_table[i].vm;
1619                         else
1620                                 val = v_table[i].vd;
1621                 }
1622         }
1623
1624         return val;
1625 }
1626
1627 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1628 {
1629         struct timespec now, diff1;
1630         u64 diff;
1631         unsigned long diffms;
1632         u32 count;
1633
1634         getrawmonotonic(&now);
1635         diff1 = timespec_sub(now, dev_priv->last_time2);
1636
1637         /* Don't divide by 0 */
1638         diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1639         if (!diffms)
1640                 return;
1641
1642         count = I915_READ(GFXEC);
1643
1644         if (count < dev_priv->last_count2) {
1645                 diff = ~0UL - dev_priv->last_count2;
1646                 diff += count;
1647         } else {
1648                 diff = count - dev_priv->last_count2;
1649         }
1650
1651         dev_priv->last_count2 = count;
1652         dev_priv->last_time2 = now;
1653
1654         /* More magic constants... */
1655         diff = diff * 1181;
1656         diff = div_u64(diff, diffms * 10);
1657         dev_priv->gfx_power = diff;
1658 }
1659
1660 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1661 {
1662         unsigned long t, corr, state1, corr2, state2;
1663         u32 pxvid, ext_v;
1664
1665         pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1666         pxvid = (pxvid >> 24) & 0x7f;
1667         ext_v = pvid_to_extvid(dev_priv, pxvid);
1668
1669         state1 = ext_v;
1670
1671         t = i915_mch_val(dev_priv);
1672
1673         /* Revel in the empirically derived constants */
1674
1675         /* Correction factor in 1/100000 units */
1676         if (t > 80)
1677                 corr = ((t * 2349) + 135940);
1678         else if (t >= 50)
1679                 corr = ((t * 964) + 29317);
1680         else /* < 50 */
1681                 corr = ((t * 301) + 1004);
1682
1683         corr = corr * ((150142 * state1) / 10000 - 78642);
1684         corr /= 100000;
1685         corr2 = (corr * dev_priv->corr);
1686
1687         state2 = (corr2 * state1) / 10000;
1688         state2 /= 100; /* convert to mW */
1689
1690         i915_update_gfx_val(dev_priv);
1691
1692         return dev_priv->gfx_power + state2;
1693 }
1694
1695 /* Global for IPS driver to get at the current i915 device */
1696 static struct drm_i915_private *i915_mch_dev;
1697 /*
1698  * Lock protecting IPS related data structures
1699  *   - i915_mch_dev
1700  *   - dev_priv->max_delay
1701  *   - dev_priv->min_delay
1702  *   - dev_priv->fmax
1703  *   - dev_priv->gpu_busy
1704  */
1705 static DEFINE_SPINLOCK(mchdev_lock);
1706
1707 /**
1708  * i915_read_mch_val - return value for IPS use
1709  *
1710  * Calculate and return a value for the IPS driver to use when deciding whether
1711  * we have thermal and power headroom to increase CPU or GPU power budget.
1712  */
1713 unsigned long i915_read_mch_val(void)
1714 {
1715         struct drm_i915_private *dev_priv;
1716         unsigned long chipset_val, graphics_val, ret = 0;
1717
1718         spin_lock(&mchdev_lock);
1719         if (!i915_mch_dev)
1720                 goto out_unlock;
1721         dev_priv = i915_mch_dev;
1722
1723         chipset_val = i915_chipset_val(dev_priv);
1724         graphics_val = i915_gfx_val(dev_priv);
1725
1726         ret = chipset_val + graphics_val;
1727
1728 out_unlock:
1729         spin_unlock(&mchdev_lock);
1730
1731         return ret;
1732 }
1733 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1734
1735 /**
1736  * i915_gpu_raise - raise GPU frequency limit
1737  *
1738  * Raise the limit; IPS indicates we have thermal headroom.
1739  */
1740 bool i915_gpu_raise(void)
1741 {
1742         struct drm_i915_private *dev_priv;
1743         bool ret = true;
1744
1745         spin_lock(&mchdev_lock);
1746         if (!i915_mch_dev) {
1747                 ret = false;
1748                 goto out_unlock;
1749         }
1750         dev_priv = i915_mch_dev;
1751
1752         if (dev_priv->max_delay > dev_priv->fmax)
1753                 dev_priv->max_delay--;
1754
1755 out_unlock:
1756         spin_unlock(&mchdev_lock);
1757
1758         return ret;
1759 }
1760 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1761
1762 /**
1763  * i915_gpu_lower - lower GPU frequency limit
1764  *
1765  * IPS indicates we're close to a thermal limit, so throttle back the GPU
1766  * frequency maximum.
1767  */
1768 bool i915_gpu_lower(void)
1769 {
1770         struct drm_i915_private *dev_priv;
1771         bool ret = true;
1772
1773         spin_lock(&mchdev_lock);
1774         if (!i915_mch_dev) {
1775                 ret = false;
1776                 goto out_unlock;
1777         }
1778         dev_priv = i915_mch_dev;
1779
1780         if (dev_priv->max_delay < dev_priv->min_delay)
1781                 dev_priv->max_delay++;
1782
1783 out_unlock:
1784         spin_unlock(&mchdev_lock);
1785
1786         return ret;
1787 }
1788 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1789
1790 /**
1791  * i915_gpu_busy - indicate GPU business to IPS
1792  *
1793  * Tell the IPS driver whether or not the GPU is busy.
1794  */
1795 bool i915_gpu_busy(void)
1796 {
1797         struct drm_i915_private *dev_priv;
1798         bool ret = false;
1799
1800         spin_lock(&mchdev_lock);
1801         if (!i915_mch_dev)
1802                 goto out_unlock;
1803         dev_priv = i915_mch_dev;
1804
1805         ret = dev_priv->busy;
1806
1807 out_unlock:
1808         spin_unlock(&mchdev_lock);
1809
1810         return ret;
1811 }
1812 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1813
1814 /**
1815  * i915_gpu_turbo_disable - disable graphics turbo
1816  *
1817  * Disable graphics turbo by resetting the max frequency and setting the
1818  * current frequency to the default.
1819  */
1820 bool i915_gpu_turbo_disable(void)
1821 {
1822         struct drm_i915_private *dev_priv;
1823         bool ret = true;
1824
1825         spin_lock(&mchdev_lock);
1826         if (!i915_mch_dev) {
1827                 ret = false;
1828                 goto out_unlock;
1829         }
1830         dev_priv = i915_mch_dev;
1831
1832         dev_priv->max_delay = dev_priv->fstart;
1833
1834         if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1835                 ret = false;
1836
1837 out_unlock:
1838         spin_unlock(&mchdev_lock);
1839
1840         return ret;
1841 }
1842 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1843
1844 /**
1845  * i915_driver_load - setup chip and create an initial config
1846  * @dev: DRM device
1847  * @flags: startup flags
1848  *
1849  * The driver load routine has to do several things:
1850  *   - drive output discovery via intel_modeset_init()
1851  *   - initialize the memory manager
1852  *   - allocate initial config memory
1853  *   - setup the DRM framebuffer with the allocated memory
1854  */
1855 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1856 {
1857         struct drm_i915_private *dev_priv;
1858         int ret = 0, mmio_bar;
1859         uint32_t agp_size;
1860
1861         /* i915 has 4 more counters */
1862         dev->counters += 4;
1863         dev->types[6] = _DRM_STAT_IRQ;
1864         dev->types[7] = _DRM_STAT_PRIMARY;
1865         dev->types[8] = _DRM_STAT_SECONDARY;
1866         dev->types[9] = _DRM_STAT_DMA;
1867
1868         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1869         if (dev_priv == NULL)
1870                 return -ENOMEM;
1871
1872         dev->dev_private = (void *)dev_priv;
1873         dev_priv->dev = dev;
1874         dev_priv->info = (struct intel_device_info *) flags;
1875
1876         if (i915_get_bridge_dev(dev)) {
1877                 ret = -EIO;
1878                 goto free_priv;
1879         }
1880
1881         /* overlay on gen2 is broken and can't address above 1G */
1882         if (IS_GEN2(dev))
1883                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1884
1885         mmio_bar = IS_GEN2(dev) ? 1 : 0;
1886         dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1887         if (!dev_priv->regs) {
1888                 DRM_ERROR("failed to map registers\n");
1889                 ret = -EIO;
1890                 goto put_bridge;
1891         }
1892
1893         dev_priv->mm.gtt = intel_gtt_get();
1894         if (!dev_priv->mm.gtt) {
1895                 DRM_ERROR("Failed to initialize GTT\n");
1896                 ret = -ENODEV;
1897                 goto out_iomapfree;
1898         }
1899
1900         agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1901
1902         dev_priv->mm.gtt_mapping =
1903                 io_mapping_create_wc(dev->agp->base, agp_size);
1904         if (dev_priv->mm.gtt_mapping == NULL) {
1905                 ret = -EIO;
1906                 goto out_rmmap;
1907         }
1908
1909         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1910          * one would think, because the kernel disables PAT on first
1911          * generation Core chips because WC PAT gets overridden by a UC
1912          * MTRR if present.  Even if a UC MTRR isn't present.
1913          */
1914         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1915                                          agp_size,
1916                                          MTRR_TYPE_WRCOMB, 1);
1917         if (dev_priv->mm.gtt_mtrr < 0) {
1918                 DRM_INFO("MTRR allocation failed.  Graphics "
1919                          "performance may suffer.\n");
1920         }
1921
1922         /* The i915 workqueue is primarily used for batched retirement of
1923          * requests (and thus managing bo) once the task has been completed
1924          * by the GPU. i915_gem_retire_requests() is called directly when we
1925          * need high-priority retirement, such as waiting for an explicit
1926          * bo.
1927          *
1928          * It is also used for periodic low-priority events, such as
1929          * idle-timers and recording error state.
1930          *
1931          * All tasks on the workqueue are expected to acquire the dev mutex
1932          * so there is no point in running more than one instance of the
1933          * workqueue at any time: max_active = 1 and NON_REENTRANT.
1934          */
1935         dev_priv->wq = alloc_workqueue("i915",
1936                                        WQ_UNBOUND | WQ_NON_REENTRANT,
1937                                        1);
1938         if (dev_priv->wq == NULL) {
1939                 DRM_ERROR("Failed to create our workqueue.\n");
1940                 ret = -ENOMEM;
1941                 goto out_iomapfree;
1942         }
1943
1944         /* enable GEM by default */
1945         dev_priv->has_gem = 1;
1946
1947         if (dev_priv->has_gem == 0 &&
1948             drm_core_check_feature(dev, DRIVER_MODESET)) {
1949                 DRM_ERROR("kernel modesetting requires GEM, disabling driver.\n");
1950                 ret = -ENODEV;
1951                 goto out_workqueue_free;
1952         }
1953
1954         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1955         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1956         if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
1957                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1958                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1959         }
1960
1961         /* Try to make sure MCHBAR is enabled before poking at it */
1962         intel_setup_mchbar(dev);
1963         intel_setup_gmbus(dev);
1964         intel_opregion_setup(dev);
1965
1966         /* Make sure the bios did its job and set up vital registers */
1967         intel_setup_bios(dev);
1968
1969         i915_gem_load(dev);
1970
1971         /* Init HWS */
1972         if (!I915_NEED_GFX_HWS(dev)) {
1973                 ret = i915_init_phys_hws(dev);
1974                 if (ret)
1975                         goto out_gem_unload;
1976         }
1977
1978         if (IS_PINEVIEW(dev))
1979                 i915_pineview_get_mem_freq(dev);
1980         else if (IS_GEN5(dev))
1981                 i915_ironlake_get_mem_freq(dev);
1982
1983         /* On the 945G/GM, the chipset reports the MSI capability on the
1984          * integrated graphics even though the support isn't actually there
1985          * according to the published specs.  It doesn't appear to function
1986          * correctly in testing on 945G.
1987          * This may be a side effect of MSI having been made available for PEG
1988          * and the registers being closely associated.
1989          *
1990          * According to chipset errata, on the 965GM, MSI interrupts may
1991          * be lost or delayed, but we use them anyways to avoid
1992          * stuck interrupts on some machines.
1993          */
1994         if (!IS_I945G(dev) && !IS_I945GM(dev))
1995                 pci_enable_msi(dev->pdev);
1996
1997         spin_lock_init(&dev_priv->user_irq_lock);
1998         spin_lock_init(&dev_priv->error_lock);
1999         dev_priv->trace_irq_seqno = 0;
2000
2001         ret = drm_vblank_init(dev, I915_NUM_PIPE);
2002         if (ret)
2003                 goto out_gem_unload;
2004
2005         /* Start out suspended */
2006         dev_priv->mm.suspended = 1;
2007
2008         intel_detect_pch(dev);
2009
2010         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2011                 ret = i915_load_modeset_init(dev);
2012                 if (ret < 0) {
2013                         DRM_ERROR("failed to init modeset\n");
2014                         goto out_gem_unload;
2015                 }
2016         }
2017
2018         /* Must be done after probing outputs */
2019         intel_opregion_init(dev);
2020         acpi_video_register();
2021
2022         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2023                     (unsigned long) dev);
2024
2025         spin_lock(&mchdev_lock);
2026         i915_mch_dev = dev_priv;
2027         dev_priv->mchdev_lock = &mchdev_lock;
2028         spin_unlock(&mchdev_lock);
2029
2030         return 0;
2031
2032 out_gem_unload:
2033         if (dev->pdev->msi_enabled)
2034                 pci_disable_msi(dev->pdev);
2035
2036         intel_teardown_gmbus(dev);
2037         intel_teardown_mchbar(dev);
2038 out_workqueue_free:
2039         destroy_workqueue(dev_priv->wq);
2040 out_iomapfree:
2041         io_mapping_free(dev_priv->mm.gtt_mapping);
2042 out_rmmap:
2043         pci_iounmap(dev->pdev, dev_priv->regs);
2044 put_bridge:
2045         pci_dev_put(dev_priv->bridge_dev);
2046 free_priv:
2047         kfree(dev_priv);
2048         return ret;
2049 }
2050
2051 int i915_driver_unload(struct drm_device *dev)
2052 {
2053         struct drm_i915_private *dev_priv = dev->dev_private;
2054         int ret;
2055
2056         spin_lock(&mchdev_lock);
2057         i915_mch_dev = NULL;
2058         spin_unlock(&mchdev_lock);
2059
2060         if (dev_priv->mm.inactive_shrinker.shrink)
2061                 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2062
2063         mutex_lock(&dev->struct_mutex);
2064         ret = i915_gpu_idle(dev);
2065         if (ret)
2066                 DRM_ERROR("failed to idle hardware: %d\n", ret);
2067         mutex_unlock(&dev->struct_mutex);
2068
2069         /* Cancel the retire work handler, which should be idle now. */
2070         cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2071
2072         io_mapping_free(dev_priv->mm.gtt_mapping);
2073         if (dev_priv->mm.gtt_mtrr >= 0) {
2074                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2075                          dev->agp->agp_info.aper_size * 1024 * 1024);
2076                 dev_priv->mm.gtt_mtrr = -1;
2077         }
2078
2079         acpi_video_unregister();
2080
2081         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2082                 intel_fbdev_fini(dev);
2083                 intel_modeset_cleanup(dev);
2084
2085                 /*
2086                  * free the memory space allocated for the child device
2087                  * config parsed from VBT
2088                  */
2089                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2090                         kfree(dev_priv->child_dev);
2091                         dev_priv->child_dev = NULL;
2092                         dev_priv->child_dev_num = 0;
2093                 }
2094
2095                 vga_switcheroo_unregister_client(dev->pdev);
2096                 vga_client_register(dev->pdev, NULL, NULL, NULL);
2097         }
2098
2099         /* Free error state after interrupts are fully disabled. */
2100         del_timer_sync(&dev_priv->hangcheck_timer);
2101         cancel_work_sync(&dev_priv->error_work);
2102         i915_destroy_error_state(dev);
2103
2104         if (dev->pdev->msi_enabled)
2105                 pci_disable_msi(dev->pdev);
2106
2107         intel_opregion_fini(dev);
2108
2109         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2110                 /* Flush any outstanding unpin_work. */
2111                 flush_workqueue(dev_priv->wq);
2112
2113                 i915_gem_free_all_phys_object(dev);
2114
2115                 mutex_lock(&dev->struct_mutex);
2116                 i915_gem_cleanup_ringbuffer(dev);
2117                 mutex_unlock(&dev->struct_mutex);
2118                 if (I915_HAS_FBC(dev) && i915_powersave)
2119                         i915_cleanup_compression(dev);
2120                 drm_mm_takedown(&dev_priv->mm.stolen);
2121
2122                 intel_cleanup_overlay(dev);
2123
2124                 if (!I915_NEED_GFX_HWS(dev))
2125                         i915_free_hws(dev);
2126         }
2127
2128         if (dev_priv->regs != NULL)
2129                 pci_iounmap(dev->pdev, dev_priv->regs);
2130
2131         intel_teardown_gmbus(dev);
2132         intel_teardown_mchbar(dev);
2133
2134         destroy_workqueue(dev_priv->wq);
2135
2136         pci_dev_put(dev_priv->bridge_dev);
2137         kfree(dev->dev_private);
2138
2139         return 0;
2140 }
2141
2142 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2143 {
2144         struct drm_i915_file_private *file_priv;
2145
2146         DRM_DEBUG_DRIVER("\n");
2147         file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2148         if (!file_priv)
2149                 return -ENOMEM;
2150
2151         file->driver_priv = file_priv;
2152
2153         spin_lock_init(&file_priv->mm.lock);
2154         INIT_LIST_HEAD(&file_priv->mm.request_list);
2155
2156         return 0;
2157 }
2158
2159 /**
2160  * i915_driver_lastclose - clean up after all DRM clients have exited
2161  * @dev: DRM device
2162  *
2163  * Take care of cleaning up after all DRM clients have exited.  In the
2164  * mode setting case, we want to restore the kernel's initial mode (just
2165  * in case the last client left us in a bad state).
2166  *
2167  * Additionally, in the non-mode setting case, we'll tear down the AGP
2168  * and DMA structures, since the kernel won't be using them, and clea
2169  * up any GEM state.
2170  */
2171 void i915_driver_lastclose(struct drm_device * dev)
2172 {
2173         drm_i915_private_t *dev_priv = dev->dev_private;
2174
2175         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2176                 drm_fb_helper_restore();
2177                 vga_switcheroo_process_delayed_switch();
2178                 return;
2179         }
2180
2181         i915_gem_lastclose(dev);
2182
2183         if (dev_priv->agp_heap)
2184                 i915_mem_takedown(&(dev_priv->agp_heap));
2185
2186         i915_dma_cleanup(dev);
2187 }
2188
2189 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2190 {
2191         drm_i915_private_t *dev_priv = dev->dev_private;
2192         i915_gem_release(dev, file_priv);
2193         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2194                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2195 }
2196
2197 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2198 {
2199         struct drm_i915_file_private *file_priv = file->driver_priv;
2200
2201         kfree(file_priv);
2202 }
2203
2204 struct drm_ioctl_desc i915_ioctls[] = {
2205         DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2206         DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2207         DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2208         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2209         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2210         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2211         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2212         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2213         DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2214         DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2215         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2216         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2217         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2218         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2219         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2220         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2221         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2222         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2223         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2224         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2225         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2226         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2227         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2228         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2229         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2230         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2231         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2232         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2233         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2234         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2235         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2236         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2237         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2238         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2239         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2240         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2241         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2242         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2243         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2244         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2245 };
2246
2247 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2248
2249 /**
2250  * Determine if the device really is AGP or not.
2251  *
2252  * All Intel graphics chipsets are treated as AGP, even if they are really
2253  * PCI-e.
2254  *
2255  * \param dev   The device to be tested.
2256  *
2257  * \returns
2258  * A value of 1 is always retured to indictate every i9x5 is AGP.
2259  */
2260 int i915_driver_device_is_agp(struct drm_device * dev)
2261 {
2262         return 1;
2263 }