drm: move pci bus master enable into driver.
[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 "../../../platform/x86/intel_ips.h"
38 #include <linux/pci.h>
39 #include <linux/vgaarb.h>
40 #include <linux/acpi.h>
41 #include <linux/pnp.h>
42 #include <linux/vga_switcheroo.h>
43 #include <linux/slab.h>
44 #include <linux/module.h>
45 #include <acpi/video.h>
46
47 static void i915_write_hws_pga(struct drm_device *dev)
48 {
49         drm_i915_private_t *dev_priv = dev->dev_private;
50         u32 addr;
51
52         addr = dev_priv->status_page_dmah->busaddr;
53         if (INTEL_INFO(dev)->gen >= 4)
54                 addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
55         I915_WRITE(HWS_PGA, addr);
56 }
57
58 /**
59  * Sets up the hardware status page for devices that need a physical address
60  * in the register.
61  */
62 static int i915_init_phys_hws(struct drm_device *dev)
63 {
64         drm_i915_private_t *dev_priv = dev->dev_private;
65
66         /* Program Hardware Status Page */
67         dev_priv->status_page_dmah =
68                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
69
70         if (!dev_priv->status_page_dmah) {
71                 DRM_ERROR("Can not allocate hardware status page\n");
72                 return -ENOMEM;
73         }
74
75         memset_io((void __force __iomem *)dev_priv->status_page_dmah->vaddr,
76                   0, PAGE_SIZE);
77
78         i915_write_hws_pga(dev);
79
80         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
81         return 0;
82 }
83
84 /**
85  * Frees the hardware status page, whether it's a physical address or a virtual
86  * address set up by the X Server.
87  */
88 static void i915_free_hws(struct drm_device *dev)
89 {
90         drm_i915_private_t *dev_priv = dev->dev_private;
91         struct intel_ring_buffer *ring = LP_RING(dev_priv);
92
93         if (dev_priv->status_page_dmah) {
94                 drm_pci_free(dev, dev_priv->status_page_dmah);
95                 dev_priv->status_page_dmah = NULL;
96         }
97
98         if (ring->status_page.gfx_addr) {
99                 ring->status_page.gfx_addr = 0;
100                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
101         }
102
103         /* Need to rewrite hardware status page */
104         I915_WRITE(HWS_PGA, 0x1ffff000);
105 }
106
107 void i915_kernel_lost_context(struct drm_device * dev)
108 {
109         drm_i915_private_t *dev_priv = dev->dev_private;
110         struct drm_i915_master_private *master_priv;
111         struct intel_ring_buffer *ring = LP_RING(dev_priv);
112
113         /*
114          * We should never lose context on the ring with modesetting
115          * as we don't expose it to userspace
116          */
117         if (drm_core_check_feature(dev, DRIVER_MODESET))
118                 return;
119
120         ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
121         ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
122         ring->space = ring->head - (ring->tail + 8);
123         if (ring->space < 0)
124                 ring->space += ring->size;
125
126         if (!dev->primary->master)
127                 return;
128
129         master_priv = dev->primary->master->driver_priv;
130         if (ring->head == ring->tail && master_priv->sarea_priv)
131                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
132 }
133
134 static int i915_dma_cleanup(struct drm_device * dev)
135 {
136         drm_i915_private_t *dev_priv = dev->dev_private;
137         int i;
138
139         /* Make sure interrupts are disabled here because the uninstall ioctl
140          * may not have been called from userspace and after dev_private
141          * is freed, it's too late.
142          */
143         if (dev->irq_enabled)
144                 drm_irq_uninstall(dev);
145
146         mutex_lock(&dev->struct_mutex);
147         for (i = 0; i < I915_NUM_RINGS; i++)
148                 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
149         mutex_unlock(&dev->struct_mutex);
150
151         /* Clear the HWS virtual address at teardown */
152         if (I915_NEED_GFX_HWS(dev))
153                 i915_free_hws(dev);
154
155         return 0;
156 }
157
158 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
159 {
160         drm_i915_private_t *dev_priv = dev->dev_private;
161         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
162         int ret;
163
164         master_priv->sarea = drm_getsarea(dev);
165         if (master_priv->sarea) {
166                 master_priv->sarea_priv = (drm_i915_sarea_t *)
167                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
168         } else {
169                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
170         }
171
172         if (init->ring_size != 0) {
173                 if (LP_RING(dev_priv)->obj != NULL) {
174                         i915_dma_cleanup(dev);
175                         DRM_ERROR("Client tried to initialize ringbuffer in "
176                                   "GEM mode\n");
177                         return -EINVAL;
178                 }
179
180                 ret = intel_render_ring_init_dri(dev,
181                                                  init->ring_start,
182                                                  init->ring_size);
183                 if (ret) {
184                         i915_dma_cleanup(dev);
185                         return ret;
186                 }
187         }
188
189         dev_priv->cpp = init->cpp;
190         dev_priv->back_offset = init->back_offset;
191         dev_priv->front_offset = init->front_offset;
192         dev_priv->current_page = 0;
193         if (master_priv->sarea_priv)
194                 master_priv->sarea_priv->pf_current_page = 0;
195
196         /* Allow hardware batchbuffers unless told otherwise.
197          */
198         dev_priv->allow_batchbuffer = 1;
199
200         return 0;
201 }
202
203 static int i915_dma_resume(struct drm_device * dev)
204 {
205         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
206         struct intel_ring_buffer *ring = LP_RING(dev_priv);
207
208         DRM_DEBUG_DRIVER("%s\n", __func__);
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);
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) >= LP_RING(dev_priv)->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 *box,
356               int DR1, int DR4)
357 {
358         struct drm_i915_private *dev_priv = dev->dev_private;
359         int ret;
360
361         if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
362             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         struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
571
572         i915_kernel_lost_context(dev);
573         return intel_wait_ring_idle(ring);
574 }
575
576 static int i915_flush_ioctl(struct drm_device *dev, void *data,
577                             struct drm_file *file_priv)
578 {
579         int ret;
580
581         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
582
583         mutex_lock(&dev->struct_mutex);
584         ret = i915_quiescent(dev);
585         mutex_unlock(&dev->struct_mutex);
586
587         return ret;
588 }
589
590 static int i915_batchbuffer(struct drm_device *dev, void *data,
591                             struct drm_file *file_priv)
592 {
593         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
594         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
595         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
596             master_priv->sarea_priv;
597         drm_i915_batchbuffer_t *batch = data;
598         int ret;
599         struct drm_clip_rect *cliprects = NULL;
600
601         if (!dev_priv->allow_batchbuffer) {
602                 DRM_ERROR("Batchbuffer ioctl disabled\n");
603                 return -EINVAL;
604         }
605
606         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
607                         batch->start, batch->used, batch->num_cliprects);
608
609         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
610
611         if (batch->num_cliprects < 0)
612                 return -EINVAL;
613
614         if (batch->num_cliprects) {
615                 cliprects = kcalloc(batch->num_cliprects,
616                                     sizeof(struct drm_clip_rect),
617                                     GFP_KERNEL);
618                 if (cliprects == NULL)
619                         return -ENOMEM;
620
621                 ret = copy_from_user(cliprects, batch->cliprects,
622                                      batch->num_cliprects *
623                                      sizeof(struct drm_clip_rect));
624                 if (ret != 0) {
625                         ret = -EFAULT;
626                         goto fail_free;
627                 }
628         }
629
630         mutex_lock(&dev->struct_mutex);
631         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
632         mutex_unlock(&dev->struct_mutex);
633
634         if (sarea_priv)
635                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
636
637 fail_free:
638         kfree(cliprects);
639
640         return ret;
641 }
642
643 static int i915_cmdbuffer(struct drm_device *dev, void *data,
644                           struct drm_file *file_priv)
645 {
646         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
647         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
648         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
649             master_priv->sarea_priv;
650         drm_i915_cmdbuffer_t *cmdbuf = data;
651         struct drm_clip_rect *cliprects = NULL;
652         void *batch_data;
653         int ret;
654
655         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
656                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
657
658         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
659
660         if (cmdbuf->num_cliprects < 0)
661                 return -EINVAL;
662
663         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
664         if (batch_data == NULL)
665                 return -ENOMEM;
666
667         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
668         if (ret != 0) {
669                 ret = -EFAULT;
670                 goto fail_batch_free;
671         }
672
673         if (cmdbuf->num_cliprects) {
674                 cliprects = kcalloc(cmdbuf->num_cliprects,
675                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
676                 if (cliprects == NULL) {
677                         ret = -ENOMEM;
678                         goto fail_batch_free;
679                 }
680
681                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
682                                      cmdbuf->num_cliprects *
683                                      sizeof(struct drm_clip_rect));
684                 if (ret != 0) {
685                         ret = -EFAULT;
686                         goto fail_clip_free;
687                 }
688         }
689
690         mutex_lock(&dev->struct_mutex);
691         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
692         mutex_unlock(&dev->struct_mutex);
693         if (ret) {
694                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
695                 goto fail_clip_free;
696         }
697
698         if (sarea_priv)
699                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
700
701 fail_clip_free:
702         kfree(cliprects);
703 fail_batch_free:
704         kfree(batch_data);
705
706         return ret;
707 }
708
709 static int i915_flip_bufs(struct drm_device *dev, void *data,
710                           struct drm_file *file_priv)
711 {
712         int ret;
713
714         DRM_DEBUG_DRIVER("%s\n", __func__);
715
716         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
717
718         mutex_lock(&dev->struct_mutex);
719         ret = i915_dispatch_flip(dev);
720         mutex_unlock(&dev->struct_mutex);
721
722         return ret;
723 }
724
725 static int i915_getparam(struct drm_device *dev, void *data,
726                          struct drm_file *file_priv)
727 {
728         drm_i915_private_t *dev_priv = dev->dev_private;
729         drm_i915_getparam_t *param = data;
730         int value;
731
732         if (!dev_priv) {
733                 DRM_ERROR("called with no initialization\n");
734                 return -EINVAL;
735         }
736
737         switch (param->param) {
738         case I915_PARAM_IRQ_ACTIVE:
739                 value = dev->pdev->irq ? 1 : 0;
740                 break;
741         case I915_PARAM_ALLOW_BATCHBUFFER:
742                 value = dev_priv->allow_batchbuffer ? 1 : 0;
743                 break;
744         case I915_PARAM_LAST_DISPATCH:
745                 value = READ_BREADCRUMB(dev_priv);
746                 break;
747         case I915_PARAM_CHIPSET_ID:
748                 value = dev->pci_device;
749                 break;
750         case I915_PARAM_HAS_GEM:
751                 value = dev_priv->has_gem;
752                 break;
753         case I915_PARAM_NUM_FENCES_AVAIL:
754                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
755                 break;
756         case I915_PARAM_HAS_OVERLAY:
757                 value = dev_priv->overlay ? 1 : 0;
758                 break;
759         case I915_PARAM_HAS_PAGEFLIPPING:
760                 value = 1;
761                 break;
762         case I915_PARAM_HAS_EXECBUF2:
763                 /* depends on GEM */
764                 value = dev_priv->has_gem;
765                 break;
766         case I915_PARAM_HAS_BSD:
767                 value = HAS_BSD(dev);
768                 break;
769         case I915_PARAM_HAS_BLT:
770                 value = HAS_BLT(dev);
771                 break;
772         case I915_PARAM_HAS_RELAXED_FENCING:
773                 value = 1;
774                 break;
775         case I915_PARAM_HAS_COHERENT_RINGS:
776                 value = 1;
777                 break;
778         case I915_PARAM_HAS_EXEC_CONSTANTS:
779                 value = INTEL_INFO(dev)->gen >= 4;
780                 break;
781         case I915_PARAM_HAS_RELAXED_DELTA:
782                 value = 1;
783                 break;
784         case I915_PARAM_HAS_GEN7_SOL_RESET:
785                 value = 1;
786                 break;
787         case I915_PARAM_HAS_LLC:
788                 value = HAS_LLC(dev);
789                 break;
790         default:
791                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
792                                  param->param);
793                 return -EINVAL;
794         }
795
796         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
797                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
798                 return -EFAULT;
799         }
800
801         return 0;
802 }
803
804 static int i915_setparam(struct drm_device *dev, void *data,
805                          struct drm_file *file_priv)
806 {
807         drm_i915_private_t *dev_priv = dev->dev_private;
808         drm_i915_setparam_t *param = data;
809
810         if (!dev_priv) {
811                 DRM_ERROR("called with no initialization\n");
812                 return -EINVAL;
813         }
814
815         switch (param->param) {
816         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
817                 break;
818         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
819                 dev_priv->tex_lru_log_granularity = param->value;
820                 break;
821         case I915_SETPARAM_ALLOW_BATCHBUFFER:
822                 dev_priv->allow_batchbuffer = param->value;
823                 break;
824         case I915_SETPARAM_NUM_USED_FENCES:
825                 if (param->value > dev_priv->num_fence_regs ||
826                     param->value < 0)
827                         return -EINVAL;
828                 /* Userspace can use first N regs */
829                 dev_priv->fence_reg_start = param->value;
830                 break;
831         default:
832                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
833                                         param->param);
834                 return -EINVAL;
835         }
836
837         return 0;
838 }
839
840 static int i915_set_status_page(struct drm_device *dev, void *data,
841                                 struct drm_file *file_priv)
842 {
843         drm_i915_private_t *dev_priv = dev->dev_private;
844         drm_i915_hws_addr_t *hws = data;
845         struct intel_ring_buffer *ring = LP_RING(dev_priv);
846
847         if (!I915_NEED_GFX_HWS(dev))
848                 return -EINVAL;
849
850         if (!dev_priv) {
851                 DRM_ERROR("called with no initialization\n");
852                 return -EINVAL;
853         }
854
855         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
856                 WARN(1, "tried to set status page when mode setting active\n");
857                 return 0;
858         }
859
860         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
861
862         ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
863
864         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
865         dev_priv->hws_map.size = 4*1024;
866         dev_priv->hws_map.type = 0;
867         dev_priv->hws_map.flags = 0;
868         dev_priv->hws_map.mtrr = 0;
869
870         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
871         if (dev_priv->hws_map.handle == NULL) {
872                 i915_dma_cleanup(dev);
873                 ring->status_page.gfx_addr = 0;
874                 DRM_ERROR("can not ioremap virtual address for"
875                                 " G33 hw status page\n");
876                 return -ENOMEM;
877         }
878         ring->status_page.page_addr =
879                 (void __force __iomem *)dev_priv->hws_map.handle;
880         memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
881         I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
882
883         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
884                          ring->status_page.gfx_addr);
885         DRM_DEBUG_DRIVER("load hws at %p\n",
886                          ring->status_page.page_addr);
887         return 0;
888 }
889
890 static int i915_get_bridge_dev(struct drm_device *dev)
891 {
892         struct drm_i915_private *dev_priv = dev->dev_private;
893
894         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
895         if (!dev_priv->bridge_dev) {
896                 DRM_ERROR("bridge device not found\n");
897                 return -1;
898         }
899         return 0;
900 }
901
902 #define MCHBAR_I915 0x44
903 #define MCHBAR_I965 0x48
904 #define MCHBAR_SIZE (4*4096)
905
906 #define DEVEN_REG 0x54
907 #define   DEVEN_MCHBAR_EN (1 << 28)
908
909 /* Allocate space for the MCH regs if needed, return nonzero on error */
910 static int
911 intel_alloc_mchbar_resource(struct drm_device *dev)
912 {
913         drm_i915_private_t *dev_priv = dev->dev_private;
914         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
915         u32 temp_lo, temp_hi = 0;
916         u64 mchbar_addr;
917         int ret;
918
919         if (INTEL_INFO(dev)->gen >= 4)
920                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
921         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
922         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
923
924         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
925 #ifdef CONFIG_PNP
926         if (mchbar_addr &&
927             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
928                 return 0;
929 #endif
930
931         /* Get some space for it */
932         dev_priv->mch_res.name = "i915 MCHBAR";
933         dev_priv->mch_res.flags = IORESOURCE_MEM;
934         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
935                                      &dev_priv->mch_res,
936                                      MCHBAR_SIZE, MCHBAR_SIZE,
937                                      PCIBIOS_MIN_MEM,
938                                      0, pcibios_align_resource,
939                                      dev_priv->bridge_dev);
940         if (ret) {
941                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
942                 dev_priv->mch_res.start = 0;
943                 return ret;
944         }
945
946         if (INTEL_INFO(dev)->gen >= 4)
947                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
948                                        upper_32_bits(dev_priv->mch_res.start));
949
950         pci_write_config_dword(dev_priv->bridge_dev, reg,
951                                lower_32_bits(dev_priv->mch_res.start));
952         return 0;
953 }
954
955 /* Setup MCHBAR if possible, return true if we should disable it again */
956 static void
957 intel_setup_mchbar(struct drm_device *dev)
958 {
959         drm_i915_private_t *dev_priv = dev->dev_private;
960         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
961         u32 temp;
962         bool enabled;
963
964         dev_priv->mchbar_need_disable = false;
965
966         if (IS_I915G(dev) || IS_I915GM(dev)) {
967                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
968                 enabled = !!(temp & DEVEN_MCHBAR_EN);
969         } else {
970                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
971                 enabled = temp & 1;
972         }
973
974         /* If it's already enabled, don't have to do anything */
975         if (enabled)
976                 return;
977
978         if (intel_alloc_mchbar_resource(dev))
979                 return;
980
981         dev_priv->mchbar_need_disable = true;
982
983         /* Space is allocated or reserved, so enable it. */
984         if (IS_I915G(dev) || IS_I915GM(dev)) {
985                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
986                                        temp | DEVEN_MCHBAR_EN);
987         } else {
988                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
989                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
990         }
991 }
992
993 static void
994 intel_teardown_mchbar(struct drm_device *dev)
995 {
996         drm_i915_private_t *dev_priv = dev->dev_private;
997         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
998         u32 temp;
999
1000         if (dev_priv->mchbar_need_disable) {
1001                 if (IS_I915G(dev) || IS_I915GM(dev)) {
1002                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1003                         temp &= ~DEVEN_MCHBAR_EN;
1004                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1005                 } else {
1006                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1007                         temp &= ~1;
1008                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1009                 }
1010         }
1011
1012         if (dev_priv->mch_res.start)
1013                 release_resource(&dev_priv->mch_res);
1014 }
1015
1016 #define PTE_ADDRESS_MASK                0xfffff000
1017 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1018 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1019 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1020 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1021 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1022 #define PTE_VALID                       (1 << 0)
1023
1024 /**
1025  * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1026  *                       a physical one
1027  * @dev: drm device
1028  * @offset: address to translate
1029  *
1030  * Some chip functions require allocations from stolen space and need the
1031  * physical address of the memory in question.
1032  */
1033 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1034 {
1035         struct drm_i915_private *dev_priv = dev->dev_private;
1036         struct pci_dev *pdev = dev_priv->bridge_dev;
1037         u32 base;
1038
1039 #if 0
1040         /* On the machines I have tested the Graphics Base of Stolen Memory
1041          * is unreliable, so compute the base by subtracting the stolen memory
1042          * from the Top of Low Usable DRAM which is where the BIOS places
1043          * the graphics stolen memory.
1044          */
1045         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1046                 /* top 32bits are reserved = 0 */
1047                 pci_read_config_dword(pdev, 0xA4, &base);
1048         } else {
1049                 /* XXX presume 8xx is the same as i915 */
1050                 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1051         }
1052 #else
1053         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1054                 u16 val;
1055                 pci_read_config_word(pdev, 0xb0, &val);
1056                 base = val >> 4 << 20;
1057         } else {
1058                 u8 val;
1059                 pci_read_config_byte(pdev, 0x9c, &val);
1060                 base = val >> 3 << 27;
1061         }
1062         base -= dev_priv->mm.gtt->stolen_size;
1063 #endif
1064
1065         return base + offset;
1066 }
1067
1068 static void i915_warn_stolen(struct drm_device *dev)
1069 {
1070         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1071         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1072 }
1073
1074 static void i915_setup_compression(struct drm_device *dev, int size)
1075 {
1076         struct drm_i915_private *dev_priv = dev->dev_private;
1077         struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1078         unsigned long cfb_base;
1079         unsigned long ll_base = 0;
1080
1081         /* Just in case the BIOS is doing something questionable. */
1082         intel_disable_fbc(dev);
1083
1084         compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1085         if (compressed_fb)
1086                 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1087         if (!compressed_fb)
1088                 goto err;
1089
1090         cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1091         if (!cfb_base)
1092                 goto err_fb;
1093
1094         if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1095                 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1096                                                     4096, 4096, 0);
1097                 if (compressed_llb)
1098                         compressed_llb = drm_mm_get_block(compressed_llb,
1099                                                           4096, 4096);
1100                 if (!compressed_llb)
1101                         goto err_fb;
1102
1103                 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1104                 if (!ll_base)
1105                         goto err_llb;
1106         }
1107
1108         dev_priv->cfb_size = size;
1109
1110         dev_priv->compressed_fb = compressed_fb;
1111         if (HAS_PCH_SPLIT(dev))
1112                 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1113         else if (IS_GM45(dev)) {
1114                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1115         } else {
1116                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1117                 I915_WRITE(FBC_LL_BASE, ll_base);
1118                 dev_priv->compressed_llb = compressed_llb;
1119         }
1120
1121         DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1122                       cfb_base, ll_base, size >> 20);
1123         return;
1124
1125 err_llb:
1126         drm_mm_put_block(compressed_llb);
1127 err_fb:
1128         drm_mm_put_block(compressed_fb);
1129 err:
1130         dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1131         i915_warn_stolen(dev);
1132 }
1133
1134 static void i915_cleanup_compression(struct drm_device *dev)
1135 {
1136         struct drm_i915_private *dev_priv = dev->dev_private;
1137
1138         drm_mm_put_block(dev_priv->compressed_fb);
1139         if (dev_priv->compressed_llb)
1140                 drm_mm_put_block(dev_priv->compressed_llb);
1141 }
1142
1143 /* true = enable decode, false = disable decoder */
1144 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1145 {
1146         struct drm_device *dev = cookie;
1147
1148         intel_modeset_vga_set_state(dev, state);
1149         if (state)
1150                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1151                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1152         else
1153                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1154 }
1155
1156 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1157 {
1158         struct drm_device *dev = pci_get_drvdata(pdev);
1159         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1160         if (state == VGA_SWITCHEROO_ON) {
1161                 printk(KERN_INFO "i915: switched on\n");
1162                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1163                 /* i915 resume handler doesn't set to D0 */
1164                 pci_set_power_state(dev->pdev, PCI_D0);
1165                 i915_resume(dev);
1166                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
1167         } else {
1168                 printk(KERN_ERR "i915: switched off\n");
1169                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1170                 i915_suspend(dev, pmm);
1171                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1172         }
1173 }
1174
1175 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1176 {
1177         struct drm_device *dev = pci_get_drvdata(pdev);
1178         bool can_switch;
1179
1180         spin_lock(&dev->count_lock);
1181         can_switch = (dev->open_count == 0);
1182         spin_unlock(&dev->count_lock);
1183         return can_switch;
1184 }
1185
1186 static int i915_load_gem_init(struct drm_device *dev)
1187 {
1188         struct drm_i915_private *dev_priv = dev->dev_private;
1189         unsigned long prealloc_size, gtt_size, mappable_size;
1190         int ret;
1191
1192         prealloc_size = dev_priv->mm.gtt->stolen_size;
1193         gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1194         mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1195
1196         /* Basic memrange allocator for stolen space */
1197         drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1198
1199         /* Let GEM Manage all of the aperture.
1200          *
1201          * However, leave one page at the end still bound to the scratch page.
1202          * There are a number of places where the hardware apparently
1203          * prefetches past the end of the object, and we've seen multiple
1204          * hangs with the GPU head pointer stuck in a batchbuffer bound
1205          * at the last page of the aperture.  One page should be enough to
1206          * keep any prefetching inside of the aperture.
1207          */
1208         i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1209
1210         mutex_lock(&dev->struct_mutex);
1211         ret = i915_gem_init_ringbuffer(dev);
1212         mutex_unlock(&dev->struct_mutex);
1213         if (ret)
1214                 return ret;
1215
1216         /* Try to set up FBC with a reasonable compressed buffer size */
1217         if (I915_HAS_FBC(dev) && i915_powersave) {
1218                 int cfb_size;
1219
1220                 /* Leave 1M for line length buffer & misc. */
1221
1222                 /* Try to get a 32M buffer... */
1223                 if (prealloc_size > (36*1024*1024))
1224                         cfb_size = 32*1024*1024;
1225                 else /* fall back to 7/8 of the stolen space */
1226                         cfb_size = prealloc_size * 7 / 8;
1227                 i915_setup_compression(dev, cfb_size);
1228         }
1229
1230         /* Allow hardware batchbuffers unless told otherwise. */
1231         dev_priv->allow_batchbuffer = 1;
1232         return 0;
1233 }
1234
1235 static int i915_load_modeset_init(struct drm_device *dev)
1236 {
1237         struct drm_i915_private *dev_priv = dev->dev_private;
1238         int ret;
1239
1240         ret = intel_parse_bios(dev);
1241         if (ret)
1242                 DRM_INFO("failed to find VBIOS tables\n");
1243
1244         /* If we have > 1 VGA cards, then we need to arbitrate access
1245          * to the common VGA resources.
1246          *
1247          * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
1248          * then we do not take part in VGA arbitration and the
1249          * vga_client_register() fails with -ENODEV.
1250          */
1251         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1252         if (ret && ret != -ENODEV)
1253                 goto out;
1254
1255         intel_register_dsm_handler();
1256
1257         ret = vga_switcheroo_register_client(dev->pdev,
1258                                              i915_switcheroo_set_state,
1259                                              NULL,
1260                                              i915_switcheroo_can_switch);
1261         if (ret)
1262                 goto cleanup_vga_client;
1263
1264         /* IIR "flip pending" bit means done if this bit is set */
1265         if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1266                 dev_priv->flip_pending_is_done = true;
1267
1268         intel_modeset_init(dev);
1269
1270         ret = i915_load_gem_init(dev);
1271         if (ret)
1272                 goto cleanup_vga_switcheroo;
1273
1274         intel_modeset_gem_init(dev);
1275
1276         ret = drm_irq_install(dev);
1277         if (ret)
1278                 goto cleanup_gem;
1279
1280         /* Always safe in the mode setting case. */
1281         /* FIXME: do pre/post-mode set stuff in core KMS code */
1282         dev->vblank_disable_allowed = 1;
1283
1284         ret = intel_fbdev_init(dev);
1285         if (ret)
1286                 goto cleanup_irq;
1287
1288         drm_kms_helper_poll_init(dev);
1289
1290         /* We're off and running w/KMS */
1291         dev_priv->mm.suspended = 0;
1292
1293         return 0;
1294
1295 cleanup_irq:
1296         drm_irq_uninstall(dev);
1297 cleanup_gem:
1298         mutex_lock(&dev->struct_mutex);
1299         i915_gem_cleanup_ringbuffer(dev);
1300         mutex_unlock(&dev->struct_mutex);
1301 cleanup_vga_switcheroo:
1302         vga_switcheroo_unregister_client(dev->pdev);
1303 cleanup_vga_client:
1304         vga_client_register(dev->pdev, NULL, NULL, NULL);
1305 out:
1306         return ret;
1307 }
1308
1309 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1310 {
1311         struct drm_i915_master_private *master_priv;
1312
1313         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1314         if (!master_priv)
1315                 return -ENOMEM;
1316
1317         master->driver_priv = master_priv;
1318         return 0;
1319 }
1320
1321 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1322 {
1323         struct drm_i915_master_private *master_priv = master->driver_priv;
1324
1325         if (!master_priv)
1326                 return;
1327
1328         kfree(master_priv);
1329
1330         master->driver_priv = NULL;
1331 }
1332
1333 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1334 {
1335         drm_i915_private_t *dev_priv = dev->dev_private;
1336         u32 tmp;
1337
1338         tmp = I915_READ(CLKCFG);
1339
1340         switch (tmp & CLKCFG_FSB_MASK) {
1341         case CLKCFG_FSB_533:
1342                 dev_priv->fsb_freq = 533; /* 133*4 */
1343                 break;
1344         case CLKCFG_FSB_800:
1345                 dev_priv->fsb_freq = 800; /* 200*4 */
1346                 break;
1347         case CLKCFG_FSB_667:
1348                 dev_priv->fsb_freq =  667; /* 167*4 */
1349                 break;
1350         case CLKCFG_FSB_400:
1351                 dev_priv->fsb_freq = 400; /* 100*4 */
1352                 break;
1353         }
1354
1355         switch (tmp & CLKCFG_MEM_MASK) {
1356         case CLKCFG_MEM_533:
1357                 dev_priv->mem_freq = 533;
1358                 break;
1359         case CLKCFG_MEM_667:
1360                 dev_priv->mem_freq = 667;
1361                 break;
1362         case CLKCFG_MEM_800:
1363                 dev_priv->mem_freq = 800;
1364                 break;
1365         }
1366
1367         /* detect pineview DDR3 setting */
1368         tmp = I915_READ(CSHRDDR3CTL);
1369         dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1370 }
1371
1372 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1373 {
1374         drm_i915_private_t *dev_priv = dev->dev_private;
1375         u16 ddrpll, csipll;
1376
1377         ddrpll = I915_READ16(DDRMPLL1);
1378         csipll = I915_READ16(CSIPLL0);
1379
1380         switch (ddrpll & 0xff) {
1381         case 0xc:
1382                 dev_priv->mem_freq = 800;
1383                 break;
1384         case 0x10:
1385                 dev_priv->mem_freq = 1066;
1386                 break;
1387         case 0x14:
1388                 dev_priv->mem_freq = 1333;
1389                 break;
1390         case 0x18:
1391                 dev_priv->mem_freq = 1600;
1392                 break;
1393         default:
1394                 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1395                                  ddrpll & 0xff);
1396                 dev_priv->mem_freq = 0;
1397                 break;
1398         }
1399
1400         dev_priv->r_t = dev_priv->mem_freq;
1401
1402         switch (csipll & 0x3ff) {
1403         case 0x00c:
1404                 dev_priv->fsb_freq = 3200;
1405                 break;
1406         case 0x00e:
1407                 dev_priv->fsb_freq = 3733;
1408                 break;
1409         case 0x010:
1410                 dev_priv->fsb_freq = 4266;
1411                 break;
1412         case 0x012:
1413                 dev_priv->fsb_freq = 4800;
1414                 break;
1415         case 0x014:
1416                 dev_priv->fsb_freq = 5333;
1417                 break;
1418         case 0x016:
1419                 dev_priv->fsb_freq = 5866;
1420                 break;
1421         case 0x018:
1422                 dev_priv->fsb_freq = 6400;
1423                 break;
1424         default:
1425                 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1426                                  csipll & 0x3ff);
1427                 dev_priv->fsb_freq = 0;
1428                 break;
1429         }
1430
1431         if (dev_priv->fsb_freq == 3200) {
1432                 dev_priv->c_m = 0;
1433         } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1434                 dev_priv->c_m = 1;
1435         } else {
1436                 dev_priv->c_m = 2;
1437         }
1438 }
1439
1440 static const struct cparams {
1441         u16 i;
1442         u16 t;
1443         u16 m;
1444         u16 c;
1445 } cparams[] = {
1446         { 1, 1333, 301, 28664 },
1447         { 1, 1066, 294, 24460 },
1448         { 1, 800, 294, 25192 },
1449         { 0, 1333, 276, 27605 },
1450         { 0, 1066, 276, 27605 },
1451         { 0, 800, 231, 23784 },
1452 };
1453
1454 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1455 {
1456         u64 total_count, diff, ret;
1457         u32 count1, count2, count3, m = 0, c = 0;
1458         unsigned long now = jiffies_to_msecs(jiffies), diff1;
1459         int i;
1460
1461         diff1 = now - dev_priv->last_time1;
1462
1463         /* Prevent division-by-zero if we are asking too fast.
1464          * Also, we don't get interesting results if we are polling
1465          * faster than once in 10ms, so just return the saved value
1466          * in such cases.
1467          */
1468         if (diff1 <= 10)
1469                 return dev_priv->chipset_power;
1470
1471         count1 = I915_READ(DMIEC);
1472         count2 = I915_READ(DDREC);
1473         count3 = I915_READ(CSIEC);
1474
1475         total_count = count1 + count2 + count3;
1476
1477         /* FIXME: handle per-counter overflow */
1478         if (total_count < dev_priv->last_count1) {
1479                 diff = ~0UL - dev_priv->last_count1;
1480                 diff += total_count;
1481         } else {
1482                 diff = total_count - dev_priv->last_count1;
1483         }
1484
1485         for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1486                 if (cparams[i].i == dev_priv->c_m &&
1487                     cparams[i].t == dev_priv->r_t) {
1488                         m = cparams[i].m;
1489                         c = cparams[i].c;
1490                         break;
1491                 }
1492         }
1493
1494         diff = div_u64(diff, diff1);
1495         ret = ((m * diff) + c);
1496         ret = div_u64(ret, 10);
1497
1498         dev_priv->last_count1 = total_count;
1499         dev_priv->last_time1 = now;
1500
1501         dev_priv->chipset_power = ret;
1502
1503         return ret;
1504 }
1505
1506 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1507 {
1508         unsigned long m, x, b;
1509         u32 tsfs;
1510
1511         tsfs = I915_READ(TSFS);
1512
1513         m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1514         x = I915_READ8(TR1);
1515
1516         b = tsfs & TSFS_INTR_MASK;
1517
1518         return ((m * x) / 127) - b;
1519 }
1520
1521 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1522 {
1523         static const struct v_table {
1524                 u16 vd; /* in .1 mil */
1525                 u16 vm; /* in .1 mil */
1526         } v_table[] = {
1527                 { 0, 0, },
1528                 { 375, 0, },
1529                 { 500, 0, },
1530                 { 625, 0, },
1531                 { 750, 0, },
1532                 { 875, 0, },
1533                 { 1000, 0, },
1534                 { 1125, 0, },
1535                 { 4125, 3000, },
1536                 { 4125, 3000, },
1537                 { 4125, 3000, },
1538                 { 4125, 3000, },
1539                 { 4125, 3000, },
1540                 { 4125, 3000, },
1541                 { 4125, 3000, },
1542                 { 4125, 3000, },
1543                 { 4125, 3000, },
1544                 { 4125, 3000, },
1545                 { 4125, 3000, },
1546                 { 4125, 3000, },
1547                 { 4125, 3000, },
1548                 { 4125, 3000, },
1549                 { 4125, 3000, },
1550                 { 4125, 3000, },
1551                 { 4125, 3000, },
1552                 { 4125, 3000, },
1553                 { 4125, 3000, },
1554                 { 4125, 3000, },
1555                 { 4125, 3000, },
1556                 { 4125, 3000, },
1557                 { 4125, 3000, },
1558                 { 4125, 3000, },
1559                 { 4250, 3125, },
1560                 { 4375, 3250, },
1561                 { 4500, 3375, },
1562                 { 4625, 3500, },
1563                 { 4750, 3625, },
1564                 { 4875, 3750, },
1565                 { 5000, 3875, },
1566                 { 5125, 4000, },
1567                 { 5250, 4125, },
1568                 { 5375, 4250, },
1569                 { 5500, 4375, },
1570                 { 5625, 4500, },
1571                 { 5750, 4625, },
1572                 { 5875, 4750, },
1573                 { 6000, 4875, },
1574                 { 6125, 5000, },
1575                 { 6250, 5125, },
1576                 { 6375, 5250, },
1577                 { 6500, 5375, },
1578                 { 6625, 5500, },
1579                 { 6750, 5625, },
1580                 { 6875, 5750, },
1581                 { 7000, 5875, },
1582                 { 7125, 6000, },
1583                 { 7250, 6125, },
1584                 { 7375, 6250, },
1585                 { 7500, 6375, },
1586                 { 7625, 6500, },
1587                 { 7750, 6625, },
1588                 { 7875, 6750, },
1589                 { 8000, 6875, },
1590                 { 8125, 7000, },
1591                 { 8250, 7125, },
1592                 { 8375, 7250, },
1593                 { 8500, 7375, },
1594                 { 8625, 7500, },
1595                 { 8750, 7625, },
1596                 { 8875, 7750, },
1597                 { 9000, 7875, },
1598                 { 9125, 8000, },
1599                 { 9250, 8125, },
1600                 { 9375, 8250, },
1601                 { 9500, 8375, },
1602                 { 9625, 8500, },
1603                 { 9750, 8625, },
1604                 { 9875, 8750, },
1605                 { 10000, 8875, },
1606                 { 10125, 9000, },
1607                 { 10250, 9125, },
1608                 { 10375, 9250, },
1609                 { 10500, 9375, },
1610                 { 10625, 9500, },
1611                 { 10750, 9625, },
1612                 { 10875, 9750, },
1613                 { 11000, 9875, },
1614                 { 11125, 10000, },
1615                 { 11250, 10125, },
1616                 { 11375, 10250, },
1617                 { 11500, 10375, },
1618                 { 11625, 10500, },
1619                 { 11750, 10625, },
1620                 { 11875, 10750, },
1621                 { 12000, 10875, },
1622                 { 12125, 11000, },
1623                 { 12250, 11125, },
1624                 { 12375, 11250, },
1625                 { 12500, 11375, },
1626                 { 12625, 11500, },
1627                 { 12750, 11625, },
1628                 { 12875, 11750, },
1629                 { 13000, 11875, },
1630                 { 13125, 12000, },
1631                 { 13250, 12125, },
1632                 { 13375, 12250, },
1633                 { 13500, 12375, },
1634                 { 13625, 12500, },
1635                 { 13750, 12625, },
1636                 { 13875, 12750, },
1637                 { 14000, 12875, },
1638                 { 14125, 13000, },
1639                 { 14250, 13125, },
1640                 { 14375, 13250, },
1641                 { 14500, 13375, },
1642                 { 14625, 13500, },
1643                 { 14750, 13625, },
1644                 { 14875, 13750, },
1645                 { 15000, 13875, },
1646                 { 15125, 14000, },
1647                 { 15250, 14125, },
1648                 { 15375, 14250, },
1649                 { 15500, 14375, },
1650                 { 15625, 14500, },
1651                 { 15750, 14625, },
1652                 { 15875, 14750, },
1653                 { 16000, 14875, },
1654                 { 16125, 15000, },
1655         };
1656         if (dev_priv->info->is_mobile)
1657                 return v_table[pxvid].vm;
1658         else
1659                 return v_table[pxvid].vd;
1660 }
1661
1662 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1663 {
1664         struct timespec now, diff1;
1665         u64 diff;
1666         unsigned long diffms;
1667         u32 count;
1668
1669         getrawmonotonic(&now);
1670         diff1 = timespec_sub(now, dev_priv->last_time2);
1671
1672         /* Don't divide by 0 */
1673         diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1674         if (!diffms)
1675                 return;
1676
1677         count = I915_READ(GFXEC);
1678
1679         if (count < dev_priv->last_count2) {
1680                 diff = ~0UL - dev_priv->last_count2;
1681                 diff += count;
1682         } else {
1683                 diff = count - dev_priv->last_count2;
1684         }
1685
1686         dev_priv->last_count2 = count;
1687         dev_priv->last_time2 = now;
1688
1689         /* More magic constants... */
1690         diff = diff * 1181;
1691         diff = div_u64(diff, diffms * 10);
1692         dev_priv->gfx_power = diff;
1693 }
1694
1695 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1696 {
1697         unsigned long t, corr, state1, corr2, state2;
1698         u32 pxvid, ext_v;
1699
1700         pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1701         pxvid = (pxvid >> 24) & 0x7f;
1702         ext_v = pvid_to_extvid(dev_priv, pxvid);
1703
1704         state1 = ext_v;
1705
1706         t = i915_mch_val(dev_priv);
1707
1708         /* Revel in the empirically derived constants */
1709
1710         /* Correction factor in 1/100000 units */
1711         if (t > 80)
1712                 corr = ((t * 2349) + 135940);
1713         else if (t >= 50)
1714                 corr = ((t * 964) + 29317);
1715         else /* < 50 */
1716                 corr = ((t * 301) + 1004);
1717
1718         corr = corr * ((150142 * state1) / 10000 - 78642);
1719         corr /= 100000;
1720         corr2 = (corr * dev_priv->corr);
1721
1722         state2 = (corr2 * state1) / 10000;
1723         state2 /= 100; /* convert to mW */
1724
1725         i915_update_gfx_val(dev_priv);
1726
1727         return dev_priv->gfx_power + state2;
1728 }
1729
1730 /* Global for IPS driver to get at the current i915 device */
1731 static struct drm_i915_private *i915_mch_dev;
1732 /*
1733  * Lock protecting IPS related data structures
1734  *   - i915_mch_dev
1735  *   - dev_priv->max_delay
1736  *   - dev_priv->min_delay
1737  *   - dev_priv->fmax
1738  *   - dev_priv->gpu_busy
1739  */
1740 static DEFINE_SPINLOCK(mchdev_lock);
1741
1742 /**
1743  * i915_read_mch_val - return value for IPS use
1744  *
1745  * Calculate and return a value for the IPS driver to use when deciding whether
1746  * we have thermal and power headroom to increase CPU or GPU power budget.
1747  */
1748 unsigned long i915_read_mch_val(void)
1749 {
1750         struct drm_i915_private *dev_priv;
1751         unsigned long chipset_val, graphics_val, ret = 0;
1752
1753         spin_lock(&mchdev_lock);
1754         if (!i915_mch_dev)
1755                 goto out_unlock;
1756         dev_priv = i915_mch_dev;
1757
1758         chipset_val = i915_chipset_val(dev_priv);
1759         graphics_val = i915_gfx_val(dev_priv);
1760
1761         ret = chipset_val + graphics_val;
1762
1763 out_unlock:
1764         spin_unlock(&mchdev_lock);
1765
1766         return ret;
1767 }
1768 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1769
1770 /**
1771  * i915_gpu_raise - raise GPU frequency limit
1772  *
1773  * Raise the limit; IPS indicates we have thermal headroom.
1774  */
1775 bool i915_gpu_raise(void)
1776 {
1777         struct drm_i915_private *dev_priv;
1778         bool ret = true;
1779
1780         spin_lock(&mchdev_lock);
1781         if (!i915_mch_dev) {
1782                 ret = false;
1783                 goto out_unlock;
1784         }
1785         dev_priv = i915_mch_dev;
1786
1787         if (dev_priv->max_delay > dev_priv->fmax)
1788                 dev_priv->max_delay--;
1789
1790 out_unlock:
1791         spin_unlock(&mchdev_lock);
1792
1793         return ret;
1794 }
1795 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1796
1797 /**
1798  * i915_gpu_lower - lower GPU frequency limit
1799  *
1800  * IPS indicates we're close to a thermal limit, so throttle back the GPU
1801  * frequency maximum.
1802  */
1803 bool i915_gpu_lower(void)
1804 {
1805         struct drm_i915_private *dev_priv;
1806         bool ret = true;
1807
1808         spin_lock(&mchdev_lock);
1809         if (!i915_mch_dev) {
1810                 ret = false;
1811                 goto out_unlock;
1812         }
1813         dev_priv = i915_mch_dev;
1814
1815         if (dev_priv->max_delay < dev_priv->min_delay)
1816                 dev_priv->max_delay++;
1817
1818 out_unlock:
1819         spin_unlock(&mchdev_lock);
1820
1821         return ret;
1822 }
1823 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1824
1825 /**
1826  * i915_gpu_busy - indicate GPU business to IPS
1827  *
1828  * Tell the IPS driver whether or not the GPU is busy.
1829  */
1830 bool i915_gpu_busy(void)
1831 {
1832         struct drm_i915_private *dev_priv;
1833         bool ret = false;
1834
1835         spin_lock(&mchdev_lock);
1836         if (!i915_mch_dev)
1837                 goto out_unlock;
1838         dev_priv = i915_mch_dev;
1839
1840         ret = dev_priv->busy;
1841
1842 out_unlock:
1843         spin_unlock(&mchdev_lock);
1844
1845         return ret;
1846 }
1847 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1848
1849 /**
1850  * i915_gpu_turbo_disable - disable graphics turbo
1851  *
1852  * Disable graphics turbo by resetting the max frequency and setting the
1853  * current frequency to the default.
1854  */
1855 bool i915_gpu_turbo_disable(void)
1856 {
1857         struct drm_i915_private *dev_priv;
1858         bool ret = true;
1859
1860         spin_lock(&mchdev_lock);
1861         if (!i915_mch_dev) {
1862                 ret = false;
1863                 goto out_unlock;
1864         }
1865         dev_priv = i915_mch_dev;
1866
1867         dev_priv->max_delay = dev_priv->fstart;
1868
1869         if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1870                 ret = false;
1871
1872 out_unlock:
1873         spin_unlock(&mchdev_lock);
1874
1875         return ret;
1876 }
1877 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1878
1879 /**
1880  * Tells the intel_ips driver that the i915 driver is now loaded, if
1881  * IPS got loaded first.
1882  *
1883  * This awkward dance is so that neither module has to depend on the
1884  * other in order for IPS to do the appropriate communication of
1885  * GPU turbo limits to i915.
1886  */
1887 static void
1888 ips_ping_for_i915_load(void)
1889 {
1890         void (*link)(void);
1891
1892         link = symbol_get(ips_link_to_i915_driver);
1893         if (link) {
1894                 link();
1895                 symbol_put(ips_link_to_i915_driver);
1896         }
1897 }
1898
1899 /**
1900  * i915_driver_load - setup chip and create an initial config
1901  * @dev: DRM device
1902  * @flags: startup flags
1903  *
1904  * The driver load routine has to do several things:
1905  *   - drive output discovery via intel_modeset_init()
1906  *   - initialize the memory manager
1907  *   - allocate initial config memory
1908  *   - setup the DRM framebuffer with the allocated memory
1909  */
1910 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1911 {
1912         struct drm_i915_private *dev_priv;
1913         int ret = 0, mmio_bar;
1914         uint32_t agp_size;
1915
1916         /* i915 has 4 more counters */
1917         dev->counters += 4;
1918         dev->types[6] = _DRM_STAT_IRQ;
1919         dev->types[7] = _DRM_STAT_PRIMARY;
1920         dev->types[8] = _DRM_STAT_SECONDARY;
1921         dev->types[9] = _DRM_STAT_DMA;
1922
1923         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1924         if (dev_priv == NULL)
1925                 return -ENOMEM;
1926
1927         dev->dev_private = (void *)dev_priv;
1928         dev_priv->dev = dev;
1929         dev_priv->info = (struct intel_device_info *) flags;
1930
1931         if (i915_get_bridge_dev(dev)) {
1932                 ret = -EIO;
1933                 goto free_priv;
1934         }
1935
1936         pci_set_master(dev->pdev);
1937
1938         /* overlay on gen2 is broken and can't address above 1G */
1939         if (IS_GEN2(dev))
1940                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1941
1942         /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1943          * using 32bit addressing, overwriting memory if HWS is located
1944          * above 4GB.
1945          *
1946          * The documentation also mentions an issue with undefined
1947          * behaviour if any general state is accessed within a page above 4GB,
1948          * which also needs to be handled carefully.
1949          */
1950         if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1951                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
1952
1953         mmio_bar = IS_GEN2(dev) ? 1 : 0;
1954         dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1955         if (!dev_priv->regs) {
1956                 DRM_ERROR("failed to map registers\n");
1957                 ret = -EIO;
1958                 goto put_bridge;
1959         }
1960
1961         dev_priv->mm.gtt = intel_gtt_get();
1962         if (!dev_priv->mm.gtt) {
1963                 DRM_ERROR("Failed to initialize GTT\n");
1964                 ret = -ENODEV;
1965                 goto out_rmmap;
1966         }
1967
1968         agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1969
1970         dev_priv->mm.gtt_mapping =
1971                 io_mapping_create_wc(dev->agp->base, agp_size);
1972         if (dev_priv->mm.gtt_mapping == NULL) {
1973                 ret = -EIO;
1974                 goto out_rmmap;
1975         }
1976
1977         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1978          * one would think, because the kernel disables PAT on first
1979          * generation Core chips because WC PAT gets overridden by a UC
1980          * MTRR if present.  Even if a UC MTRR isn't present.
1981          */
1982         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1983                                          agp_size,
1984                                          MTRR_TYPE_WRCOMB, 1);
1985         if (dev_priv->mm.gtt_mtrr < 0) {
1986                 DRM_INFO("MTRR allocation failed.  Graphics "
1987                          "performance may suffer.\n");
1988         }
1989
1990         /* The i915 workqueue is primarily used for batched retirement of
1991          * requests (and thus managing bo) once the task has been completed
1992          * by the GPU. i915_gem_retire_requests() is called directly when we
1993          * need high-priority retirement, such as waiting for an explicit
1994          * bo.
1995          *
1996          * It is also used for periodic low-priority events, such as
1997          * idle-timers and recording error state.
1998          *
1999          * All tasks on the workqueue are expected to acquire the dev mutex
2000          * so there is no point in running more than one instance of the
2001          * workqueue at any time: max_active = 1 and NON_REENTRANT.
2002          */
2003         dev_priv->wq = alloc_workqueue("i915",
2004                                        WQ_UNBOUND | WQ_NON_REENTRANT,
2005                                        1);
2006         if (dev_priv->wq == NULL) {
2007                 DRM_ERROR("Failed to create our workqueue.\n");
2008                 ret = -ENOMEM;
2009                 goto out_mtrrfree;
2010         }
2011
2012         /* enable GEM by default */
2013         dev_priv->has_gem = 1;
2014
2015         intel_irq_init(dev);
2016
2017         /* Try to make sure MCHBAR is enabled before poking at it */
2018         intel_setup_mchbar(dev);
2019         intel_setup_gmbus(dev);
2020         intel_opregion_setup(dev);
2021
2022         /* Make sure the bios did its job and set up vital registers */
2023         intel_setup_bios(dev);
2024
2025         i915_gem_load(dev);
2026
2027         /* Init HWS */
2028         if (!I915_NEED_GFX_HWS(dev)) {
2029                 ret = i915_init_phys_hws(dev);
2030                 if (ret)
2031                         goto out_gem_unload;
2032         }
2033
2034         if (IS_PINEVIEW(dev))
2035                 i915_pineview_get_mem_freq(dev);
2036         else if (IS_GEN5(dev))
2037                 i915_ironlake_get_mem_freq(dev);
2038
2039         /* On the 945G/GM, the chipset reports the MSI capability on the
2040          * integrated graphics even though the support isn't actually there
2041          * according to the published specs.  It doesn't appear to function
2042          * correctly in testing on 945G.
2043          * This may be a side effect of MSI having been made available for PEG
2044          * and the registers being closely associated.
2045          *
2046          * According to chipset errata, on the 965GM, MSI interrupts may
2047          * be lost or delayed, but we use them anyways to avoid
2048          * stuck interrupts on some machines.
2049          */
2050         if (!IS_I945G(dev) && !IS_I945GM(dev))
2051                 pci_enable_msi(dev->pdev);
2052
2053         spin_lock_init(&dev_priv->gt_lock);
2054         spin_lock_init(&dev_priv->irq_lock);
2055         spin_lock_init(&dev_priv->error_lock);
2056         spin_lock_init(&dev_priv->rps_lock);
2057
2058         if (IS_IVYBRIDGE(dev))
2059                 dev_priv->num_pipe = 3;
2060         else if (IS_MOBILE(dev) || !IS_GEN2(dev))
2061                 dev_priv->num_pipe = 2;
2062         else
2063                 dev_priv->num_pipe = 1;
2064
2065         ret = drm_vblank_init(dev, dev_priv->num_pipe);
2066         if (ret)
2067                 goto out_gem_unload;
2068
2069         /* Start out suspended */
2070         dev_priv->mm.suspended = 1;
2071
2072         intel_detect_pch(dev);
2073
2074         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2075                 ret = i915_load_modeset_init(dev);
2076                 if (ret < 0) {
2077                         DRM_ERROR("failed to init modeset\n");
2078                         goto out_gem_unload;
2079                 }
2080         }
2081
2082         /* Must be done after probing outputs */
2083         intel_opregion_init(dev);
2084         acpi_video_register();
2085
2086         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2087                     (unsigned long) dev);
2088
2089         spin_lock(&mchdev_lock);
2090         i915_mch_dev = dev_priv;
2091         dev_priv->mchdev_lock = &mchdev_lock;
2092         spin_unlock(&mchdev_lock);
2093
2094         ips_ping_for_i915_load();
2095
2096         return 0;
2097
2098 out_gem_unload:
2099         if (dev_priv->mm.inactive_shrinker.shrink)
2100                 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2101
2102         if (dev->pdev->msi_enabled)
2103                 pci_disable_msi(dev->pdev);
2104
2105         intel_teardown_gmbus(dev);
2106         intel_teardown_mchbar(dev);
2107         destroy_workqueue(dev_priv->wq);
2108 out_mtrrfree:
2109         if (dev_priv->mm.gtt_mtrr >= 0) {
2110                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2111                          dev->agp->agp_info.aper_size * 1024 * 1024);
2112                 dev_priv->mm.gtt_mtrr = -1;
2113         }
2114         io_mapping_free(dev_priv->mm.gtt_mapping);
2115 out_rmmap:
2116         pci_iounmap(dev->pdev, dev_priv->regs);
2117 put_bridge:
2118         pci_dev_put(dev_priv->bridge_dev);
2119 free_priv:
2120         kfree(dev_priv);
2121         return ret;
2122 }
2123
2124 int i915_driver_unload(struct drm_device *dev)
2125 {
2126         struct drm_i915_private *dev_priv = dev->dev_private;
2127         int ret;
2128
2129         spin_lock(&mchdev_lock);
2130         i915_mch_dev = NULL;
2131         spin_unlock(&mchdev_lock);
2132
2133         if (dev_priv->mm.inactive_shrinker.shrink)
2134                 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2135
2136         mutex_lock(&dev->struct_mutex);
2137         ret = i915_gpu_idle(dev, true);
2138         if (ret)
2139                 DRM_ERROR("failed to idle hardware: %d\n", ret);
2140         mutex_unlock(&dev->struct_mutex);
2141
2142         /* Cancel the retire work handler, which should be idle now. */
2143         cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2144
2145         io_mapping_free(dev_priv->mm.gtt_mapping);
2146         if (dev_priv->mm.gtt_mtrr >= 0) {
2147                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2148                          dev->agp->agp_info.aper_size * 1024 * 1024);
2149                 dev_priv->mm.gtt_mtrr = -1;
2150         }
2151
2152         acpi_video_unregister();
2153
2154         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2155                 intel_fbdev_fini(dev);
2156                 intel_modeset_cleanup(dev);
2157
2158                 /*
2159                  * free the memory space allocated for the child device
2160                  * config parsed from VBT
2161                  */
2162                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2163                         kfree(dev_priv->child_dev);
2164                         dev_priv->child_dev = NULL;
2165                         dev_priv->child_dev_num = 0;
2166                 }
2167
2168                 vga_switcheroo_unregister_client(dev->pdev);
2169                 vga_client_register(dev->pdev, NULL, NULL, NULL);
2170         }
2171
2172         /* Free error state after interrupts are fully disabled. */
2173         del_timer_sync(&dev_priv->hangcheck_timer);
2174         cancel_work_sync(&dev_priv->error_work);
2175         i915_destroy_error_state(dev);
2176
2177         if (dev->pdev->msi_enabled)
2178                 pci_disable_msi(dev->pdev);
2179
2180         intel_opregion_fini(dev);
2181
2182         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2183                 /* Flush any outstanding unpin_work. */
2184                 flush_workqueue(dev_priv->wq);
2185
2186                 mutex_lock(&dev->struct_mutex);
2187                 i915_gem_free_all_phys_object(dev);
2188                 i915_gem_cleanup_ringbuffer(dev);
2189                 mutex_unlock(&dev->struct_mutex);
2190                 if (I915_HAS_FBC(dev) && i915_powersave)
2191                         i915_cleanup_compression(dev);
2192                 drm_mm_takedown(&dev_priv->mm.stolen);
2193
2194                 intel_cleanup_overlay(dev);
2195
2196                 if (!I915_NEED_GFX_HWS(dev))
2197                         i915_free_hws(dev);
2198         }
2199
2200         if (dev_priv->regs != NULL)
2201                 pci_iounmap(dev->pdev, dev_priv->regs);
2202
2203         intel_teardown_gmbus(dev);
2204         intel_teardown_mchbar(dev);
2205
2206         destroy_workqueue(dev_priv->wq);
2207
2208         pci_dev_put(dev_priv->bridge_dev);
2209         kfree(dev->dev_private);
2210
2211         return 0;
2212 }
2213
2214 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2215 {
2216         struct drm_i915_file_private *file_priv;
2217
2218         DRM_DEBUG_DRIVER("\n");
2219         file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2220         if (!file_priv)
2221                 return -ENOMEM;
2222
2223         file->driver_priv = file_priv;
2224
2225         spin_lock_init(&file_priv->mm.lock);
2226         INIT_LIST_HEAD(&file_priv->mm.request_list);
2227
2228         return 0;
2229 }
2230
2231 /**
2232  * i915_driver_lastclose - clean up after all DRM clients have exited
2233  * @dev: DRM device
2234  *
2235  * Take care of cleaning up after all DRM clients have exited.  In the
2236  * mode setting case, we want to restore the kernel's initial mode (just
2237  * in case the last client left us in a bad state).
2238  *
2239  * Additionally, in the non-mode setting case, we'll tear down the AGP
2240  * and DMA structures, since the kernel won't be using them, and clea
2241  * up any GEM state.
2242  */
2243 void i915_driver_lastclose(struct drm_device * dev)
2244 {
2245         drm_i915_private_t *dev_priv = dev->dev_private;
2246
2247         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2248                 intel_fb_restore_mode(dev);
2249                 vga_switcheroo_process_delayed_switch();
2250                 return;
2251         }
2252
2253         i915_gem_lastclose(dev);
2254
2255         i915_dma_cleanup(dev);
2256 }
2257
2258 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2259 {
2260         i915_gem_release(dev, file_priv);
2261 }
2262
2263 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2264 {
2265         struct drm_i915_file_private *file_priv = file->driver_priv;
2266
2267         kfree(file_priv);
2268 }
2269
2270 struct drm_ioctl_desc i915_ioctls[] = {
2271         DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2272         DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2273         DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2274         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2275         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2276         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2277         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2278         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2279         DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
2280         DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
2281         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2282         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2283         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2284         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2285         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2286         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2287         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2288         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2289         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2290         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2291         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2292         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2293         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2294         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2295         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2296         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2297         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2298         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2299         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2300         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2301         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2302         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2303         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2304         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2305         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2306         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2307         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2308         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2309         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2310         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2311         DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2312         DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, intel_sprite_get_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2313 };
2314
2315 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2316
2317 /**
2318  * Determine if the device really is AGP or not.
2319  *
2320  * All Intel graphics chipsets are treated as AGP, even if they are really
2321  * PCI-e.
2322  *
2323  * \param dev   The device to be tested.
2324  *
2325  * \returns
2326  * A value of 1 is always retured to indictate every i9x5 is AGP.
2327  */
2328 int i915_driver_device_is_agp(struct drm_device * dev)
2329 {
2330         return 1;
2331 }