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drm/i915: interrupt & vblank support for Ivy Bridge
[deliverable/linux.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 <acpi/video.h>
45
46 static void i915_write_hws_pga(struct drm_device *dev)
47 {
48 drm_i915_private_t *dev_priv = dev->dev_private;
49 u32 addr;
50
51 addr = dev_priv->status_page_dmah->busaddr;
52 if (INTEL_INFO(dev)->gen >= 4)
53 addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
54 I915_WRITE(HWS_PGA, addr);
55 }
56
57 /**
58 * Sets up the hardware status page for devices that need a physical address
59 * in the register.
60 */
61 static int i915_init_phys_hws(struct drm_device *dev)
62 {
63 drm_i915_private_t *dev_priv = dev->dev_private;
64 struct intel_ring_buffer *ring = LP_RING(dev_priv);
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 ring->status_page.page_addr =
75 (void __force __iomem *)dev_priv->status_page_dmah->vaddr;
76
77 memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
78
79 i915_write_hws_pga(dev);
80
81 DRM_DEBUG_DRIVER("Enabled hardware status page\n");
82 return 0;
83 }
84
85 /**
86 * Frees the hardware status page, whether it's a physical address or a virtual
87 * address set up by the X Server.
88 */
89 static void i915_free_hws(struct drm_device *dev)
90 {
91 drm_i915_private_t *dev_priv = dev->dev_private;
92 struct intel_ring_buffer *ring = LP_RING(dev_priv);
93
94 if (dev_priv->status_page_dmah) {
95 drm_pci_free(dev, dev_priv->status_page_dmah);
96 dev_priv->status_page_dmah = NULL;
97 }
98
99 if (ring->status_page.gfx_addr) {
100 ring->status_page.gfx_addr = 0;
101 drm_core_ioremapfree(&dev_priv->hws_map, dev);
102 }
103
104 /* Need to rewrite hardware status page */
105 I915_WRITE(HWS_PGA, 0x1ffff000);
106 }
107
108 void i915_kernel_lost_context(struct drm_device * dev)
109 {
110 drm_i915_private_t *dev_priv = dev->dev_private;
111 struct drm_i915_master_private *master_priv;
112 struct intel_ring_buffer *ring = LP_RING(dev_priv);
113
114 /*
115 * We should never lose context on the ring with modesetting
116 * as we don't expose it to userspace
117 */
118 if (drm_core_check_feature(dev, DRIVER_MODESET))
119 return;
120
121 ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
122 ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
123 ring->space = ring->head - (ring->tail + 8);
124 if (ring->space < 0)
125 ring->space += ring->size;
126
127 if (!dev->primary->master)
128 return;
129
130 master_priv = dev->primary->master->driver_priv;
131 if (ring->head == ring->tail && master_priv->sarea_priv)
132 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
133 }
134
135 static int i915_dma_cleanup(struct drm_device * dev)
136 {
137 drm_i915_private_t *dev_priv = dev->dev_private;
138 int i;
139
140 /* Make sure interrupts are disabled here because the uninstall ioctl
141 * may not have been called from userspace and after dev_private
142 * is freed, it's too late.
143 */
144 if (dev->irq_enabled)
145 drm_irq_uninstall(dev);
146
147 mutex_lock(&dev->struct_mutex);
148 for (i = 0; i < I915_NUM_RINGS; i++)
149 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
150 mutex_unlock(&dev->struct_mutex);
151
152 /* Clear the HWS virtual address at teardown */
153 if (I915_NEED_GFX_HWS(dev))
154 i915_free_hws(dev);
155
156 return 0;
157 }
158
159 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
160 {
161 drm_i915_private_t *dev_priv = dev->dev_private;
162 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
163 int ret;
164
165 master_priv->sarea = drm_getsarea(dev);
166 if (master_priv->sarea) {
167 master_priv->sarea_priv = (drm_i915_sarea_t *)
168 ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
169 } else {
170 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
171 }
172
173 if (init->ring_size != 0) {
174 if (LP_RING(dev_priv)->obj != NULL) {
175 i915_dma_cleanup(dev);
176 DRM_ERROR("Client tried to initialize ringbuffer in "
177 "GEM mode\n");
178 return -EINVAL;
179 }
180
181 ret = intel_render_ring_init_dri(dev,
182 init->ring_start,
183 init->ring_size);
184 if (ret) {
185 i915_dma_cleanup(dev);
186 return ret;
187 }
188 }
189
190 dev_priv->cpp = init->cpp;
191 dev_priv->back_offset = init->back_offset;
192 dev_priv->front_offset = init->front_offset;
193 dev_priv->current_page = 0;
194 if (master_priv->sarea_priv)
195 master_priv->sarea_priv->pf_current_page = 0;
196
197 /* Allow hardware batchbuffers unless told otherwise.
198 */
199 dev_priv->allow_batchbuffer = 1;
200
201 return 0;
202 }
203
204 static int i915_dma_resume(struct drm_device * dev)
205 {
206 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
207 struct intel_ring_buffer *ring = LP_RING(dev_priv);
208
209 DRM_DEBUG_DRIVER("%s\n", __func__);
210
211 if (ring->map.handle == NULL) {
212 DRM_ERROR("can not ioremap virtual address for"
213 " ring buffer\n");
214 return -ENOMEM;
215 }
216
217 /* Program Hardware Status Page */
218 if (!ring->status_page.page_addr) {
219 DRM_ERROR("Can not find hardware status page\n");
220 return -EINVAL;
221 }
222 DRM_DEBUG_DRIVER("hw status page @ %p\n",
223 ring->status_page.page_addr);
224 if (ring->status_page.gfx_addr != 0)
225 intel_ring_setup_status_page(ring);
226 else
227 i915_write_hws_pga(dev);
228
229 DRM_DEBUG_DRIVER("Enabled hardware status page\n");
230
231 return 0;
232 }
233
234 static int i915_dma_init(struct drm_device *dev, void *data,
235 struct drm_file *file_priv)
236 {
237 drm_i915_init_t *init = data;
238 int retcode = 0;
239
240 switch (init->func) {
241 case I915_INIT_DMA:
242 retcode = i915_initialize(dev, init);
243 break;
244 case I915_CLEANUP_DMA:
245 retcode = i915_dma_cleanup(dev);
246 break;
247 case I915_RESUME_DMA:
248 retcode = i915_dma_resume(dev);
249 break;
250 default:
251 retcode = -EINVAL;
252 break;
253 }
254
255 return retcode;
256 }
257
258 /* Implement basically the same security restrictions as hardware does
259 * for MI_BATCH_NON_SECURE. These can be made stricter at any time.
260 *
261 * Most of the calculations below involve calculating the size of a
262 * particular instruction. It's important to get the size right as
263 * that tells us where the next instruction to check is. Any illegal
264 * instruction detected will be given a size of zero, which is a
265 * signal to abort the rest of the buffer.
266 */
267 static int validate_cmd(int cmd)
268 {
269 switch (((cmd >> 29) & 0x7)) {
270 case 0x0:
271 switch ((cmd >> 23) & 0x3f) {
272 case 0x0:
273 return 1; /* MI_NOOP */
274 case 0x4:
275 return 1; /* MI_FLUSH */
276 default:
277 return 0; /* disallow everything else */
278 }
279 break;
280 case 0x1:
281 return 0; /* reserved */
282 case 0x2:
283 return (cmd & 0xff) + 2; /* 2d commands */
284 case 0x3:
285 if (((cmd >> 24) & 0x1f) <= 0x18)
286 return 1;
287
288 switch ((cmd >> 24) & 0x1f) {
289 case 0x1c:
290 return 1;
291 case 0x1d:
292 switch ((cmd >> 16) & 0xff) {
293 case 0x3:
294 return (cmd & 0x1f) + 2;
295 case 0x4:
296 return (cmd & 0xf) + 2;
297 default:
298 return (cmd & 0xffff) + 2;
299 }
300 case 0x1e:
301 if (cmd & (1 << 23))
302 return (cmd & 0xffff) + 1;
303 else
304 return 1;
305 case 0x1f:
306 if ((cmd & (1 << 23)) == 0) /* inline vertices */
307 return (cmd & 0x1ffff) + 2;
308 else if (cmd & (1 << 17)) /* indirect random */
309 if ((cmd & 0xffff) == 0)
310 return 0; /* unknown length, too hard */
311 else
312 return (((cmd & 0xffff) + 1) / 2) + 1;
313 else
314 return 2; /* indirect sequential */
315 default:
316 return 0;
317 }
318 default:
319 return 0;
320 }
321
322 return 0;
323 }
324
325 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
326 {
327 drm_i915_private_t *dev_priv = dev->dev_private;
328 int i, ret;
329
330 if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)
331 return -EINVAL;
332
333 for (i = 0; i < dwords;) {
334 int sz = validate_cmd(buffer[i]);
335 if (sz == 0 || i + sz > dwords)
336 return -EINVAL;
337 i += sz;
338 }
339
340 ret = BEGIN_LP_RING((dwords+1)&~1);
341 if (ret)
342 return ret;
343
344 for (i = 0; i < dwords; i++)
345 OUT_RING(buffer[i]);
346 if (dwords & 1)
347 OUT_RING(0);
348
349 ADVANCE_LP_RING();
350
351 return 0;
352 }
353
354 int
355 i915_emit_box(struct drm_device *dev,
356 struct drm_clip_rect *box,
357 int DR1, int DR4)
358 {
359 struct drm_i915_private *dev_priv = dev->dev_private;
360 int ret;
361
362 if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
363 box->y2 <= 0 || box->x2 <= 0) {
364 DRM_ERROR("Bad box %d,%d..%d,%d\n",
365 box->x1, box->y1, box->x2, box->y2);
366 return -EINVAL;
367 }
368
369 if (INTEL_INFO(dev)->gen >= 4) {
370 ret = BEGIN_LP_RING(4);
371 if (ret)
372 return ret;
373
374 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
375 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
376 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
377 OUT_RING(DR4);
378 } else {
379 ret = BEGIN_LP_RING(6);
380 if (ret)
381 return ret;
382
383 OUT_RING(GFX_OP_DRAWRECT_INFO);
384 OUT_RING(DR1);
385 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
386 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
387 OUT_RING(DR4);
388 OUT_RING(0);
389 }
390 ADVANCE_LP_RING();
391
392 return 0;
393 }
394
395 /* XXX: Emitting the counter should really be moved to part of the IRQ
396 * emit. For now, do it in both places:
397 */
398
399 static void i915_emit_breadcrumb(struct drm_device *dev)
400 {
401 drm_i915_private_t *dev_priv = dev->dev_private;
402 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
403
404 dev_priv->counter++;
405 if (dev_priv->counter > 0x7FFFFFFFUL)
406 dev_priv->counter = 0;
407 if (master_priv->sarea_priv)
408 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
409
410 if (BEGIN_LP_RING(4) == 0) {
411 OUT_RING(MI_STORE_DWORD_INDEX);
412 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
413 OUT_RING(dev_priv->counter);
414 OUT_RING(0);
415 ADVANCE_LP_RING();
416 }
417 }
418
419 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
420 drm_i915_cmdbuffer_t *cmd,
421 struct drm_clip_rect *cliprects,
422 void *cmdbuf)
423 {
424 int nbox = cmd->num_cliprects;
425 int i = 0, count, ret;
426
427 if (cmd->sz & 0x3) {
428 DRM_ERROR("alignment");
429 return -EINVAL;
430 }
431
432 i915_kernel_lost_context(dev);
433
434 count = nbox ? nbox : 1;
435
436 for (i = 0; i < count; i++) {
437 if (i < nbox) {
438 ret = i915_emit_box(dev, &cliprects[i],
439 cmd->DR1, cmd->DR4);
440 if (ret)
441 return ret;
442 }
443
444 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
445 if (ret)
446 return ret;
447 }
448
449 i915_emit_breadcrumb(dev);
450 return 0;
451 }
452
453 static int i915_dispatch_batchbuffer(struct drm_device * dev,
454 drm_i915_batchbuffer_t * batch,
455 struct drm_clip_rect *cliprects)
456 {
457 struct drm_i915_private *dev_priv = dev->dev_private;
458 int nbox = batch->num_cliprects;
459 int i, count, ret;
460
461 if ((batch->start | batch->used) & 0x7) {
462 DRM_ERROR("alignment");
463 return -EINVAL;
464 }
465
466 i915_kernel_lost_context(dev);
467
468 count = nbox ? nbox : 1;
469 for (i = 0; i < count; i++) {
470 if (i < nbox) {
471 ret = i915_emit_box(dev, &cliprects[i],
472 batch->DR1, batch->DR4);
473 if (ret)
474 return ret;
475 }
476
477 if (!IS_I830(dev) && !IS_845G(dev)) {
478 ret = BEGIN_LP_RING(2);
479 if (ret)
480 return ret;
481
482 if (INTEL_INFO(dev)->gen >= 4) {
483 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
484 OUT_RING(batch->start);
485 } else {
486 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
487 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
488 }
489 } else {
490 ret = BEGIN_LP_RING(4);
491 if (ret)
492 return ret;
493
494 OUT_RING(MI_BATCH_BUFFER);
495 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
496 OUT_RING(batch->start + batch->used - 4);
497 OUT_RING(0);
498 }
499 ADVANCE_LP_RING();
500 }
501
502
503 if (IS_G4X(dev) || IS_GEN5(dev)) {
504 if (BEGIN_LP_RING(2) == 0) {
505 OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
506 OUT_RING(MI_NOOP);
507 ADVANCE_LP_RING();
508 }
509 }
510
511 i915_emit_breadcrumb(dev);
512 return 0;
513 }
514
515 static int i915_dispatch_flip(struct drm_device * dev)
516 {
517 drm_i915_private_t *dev_priv = dev->dev_private;
518 struct drm_i915_master_private *master_priv =
519 dev->primary->master->driver_priv;
520 int ret;
521
522 if (!master_priv->sarea_priv)
523 return -EINVAL;
524
525 DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
526 __func__,
527 dev_priv->current_page,
528 master_priv->sarea_priv->pf_current_page);
529
530 i915_kernel_lost_context(dev);
531
532 ret = BEGIN_LP_RING(10);
533 if (ret)
534 return ret;
535
536 OUT_RING(MI_FLUSH | MI_READ_FLUSH);
537 OUT_RING(0);
538
539 OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
540 OUT_RING(0);
541 if (dev_priv->current_page == 0) {
542 OUT_RING(dev_priv->back_offset);
543 dev_priv->current_page = 1;
544 } else {
545 OUT_RING(dev_priv->front_offset);
546 dev_priv->current_page = 0;
547 }
548 OUT_RING(0);
549
550 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
551 OUT_RING(0);
552
553 ADVANCE_LP_RING();
554
555 master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
556
557 if (BEGIN_LP_RING(4) == 0) {
558 OUT_RING(MI_STORE_DWORD_INDEX);
559 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
560 OUT_RING(dev_priv->counter);
561 OUT_RING(0);
562 ADVANCE_LP_RING();
563 }
564
565 master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
566 return 0;
567 }
568
569 static int i915_quiescent(struct drm_device *dev)
570 {
571 struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
572
573 i915_kernel_lost_context(dev);
574 return intel_wait_ring_idle(ring);
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 case I915_PARAM_HAS_COHERENT_RINGS:
777 value = 1;
778 break;
779 case I915_PARAM_HAS_EXEC_CONSTANTS:
780 value = INTEL_INFO(dev)->gen >= 4;
781 break;
782 case I915_PARAM_HAS_RELAXED_DELTA:
783 value = 1;
784 break;
785 default:
786 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
787 param->param);
788 return -EINVAL;
789 }
790
791 if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
792 DRM_ERROR("DRM_COPY_TO_USER failed\n");
793 return -EFAULT;
794 }
795
796 return 0;
797 }
798
799 static int i915_setparam(struct drm_device *dev, void *data,
800 struct drm_file *file_priv)
801 {
802 drm_i915_private_t *dev_priv = dev->dev_private;
803 drm_i915_setparam_t *param = data;
804
805 if (!dev_priv) {
806 DRM_ERROR("called with no initialization\n");
807 return -EINVAL;
808 }
809
810 switch (param->param) {
811 case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
812 break;
813 case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
814 dev_priv->tex_lru_log_granularity = param->value;
815 break;
816 case I915_SETPARAM_ALLOW_BATCHBUFFER:
817 dev_priv->allow_batchbuffer = param->value;
818 break;
819 case I915_SETPARAM_NUM_USED_FENCES:
820 if (param->value > dev_priv->num_fence_regs ||
821 param->value < 0)
822 return -EINVAL;
823 /* Userspace can use first N regs */
824 dev_priv->fence_reg_start = param->value;
825 break;
826 default:
827 DRM_DEBUG_DRIVER("unknown parameter %d\n",
828 param->param);
829 return -EINVAL;
830 }
831
832 return 0;
833 }
834
835 static int i915_set_status_page(struct drm_device *dev, void *data,
836 struct drm_file *file_priv)
837 {
838 drm_i915_private_t *dev_priv = dev->dev_private;
839 drm_i915_hws_addr_t *hws = data;
840 struct intel_ring_buffer *ring = LP_RING(dev_priv);
841
842 if (!I915_NEED_GFX_HWS(dev))
843 return -EINVAL;
844
845 if (!dev_priv) {
846 DRM_ERROR("called with no initialization\n");
847 return -EINVAL;
848 }
849
850 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
851 WARN(1, "tried to set status page when mode setting active\n");
852 return 0;
853 }
854
855 DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
856
857 ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
858
859 dev_priv->hws_map.offset = dev->agp->base + hws->addr;
860 dev_priv->hws_map.size = 4*1024;
861 dev_priv->hws_map.type = 0;
862 dev_priv->hws_map.flags = 0;
863 dev_priv->hws_map.mtrr = 0;
864
865 drm_core_ioremap_wc(&dev_priv->hws_map, dev);
866 if (dev_priv->hws_map.handle == NULL) {
867 i915_dma_cleanup(dev);
868 ring->status_page.gfx_addr = 0;
869 DRM_ERROR("can not ioremap virtual address for"
870 " G33 hw status page\n");
871 return -ENOMEM;
872 }
873 ring->status_page.page_addr =
874 (void __force __iomem *)dev_priv->hws_map.handle;
875 memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
876 I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
877
878 DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
879 ring->status_page.gfx_addr);
880 DRM_DEBUG_DRIVER("load hws at %p\n",
881 ring->status_page.page_addr);
882 return 0;
883 }
884
885 static int i915_get_bridge_dev(struct drm_device *dev)
886 {
887 struct drm_i915_private *dev_priv = dev->dev_private;
888
889 dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
890 if (!dev_priv->bridge_dev) {
891 DRM_ERROR("bridge device not found\n");
892 return -1;
893 }
894 return 0;
895 }
896
897 #define MCHBAR_I915 0x44
898 #define MCHBAR_I965 0x48
899 #define MCHBAR_SIZE (4*4096)
900
901 #define DEVEN_REG 0x54
902 #define DEVEN_MCHBAR_EN (1 << 28)
903
904 /* Allocate space for the MCH regs if needed, return nonzero on error */
905 static int
906 intel_alloc_mchbar_resource(struct drm_device *dev)
907 {
908 drm_i915_private_t *dev_priv = dev->dev_private;
909 int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
910 u32 temp_lo, temp_hi = 0;
911 u64 mchbar_addr;
912 int ret;
913
914 if (INTEL_INFO(dev)->gen >= 4)
915 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
916 pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
917 mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
918
919 /* If ACPI doesn't have it, assume we need to allocate it ourselves */
920 #ifdef CONFIG_PNP
921 if (mchbar_addr &&
922 pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
923 return 0;
924 #endif
925
926 /* Get some space for it */
927 dev_priv->mch_res.name = "i915 MCHBAR";
928 dev_priv->mch_res.flags = IORESOURCE_MEM;
929 ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
930 &dev_priv->mch_res,
931 MCHBAR_SIZE, MCHBAR_SIZE,
932 PCIBIOS_MIN_MEM,
933 0, pcibios_align_resource,
934 dev_priv->bridge_dev);
935 if (ret) {
936 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
937 dev_priv->mch_res.start = 0;
938 return ret;
939 }
940
941 if (INTEL_INFO(dev)->gen >= 4)
942 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
943 upper_32_bits(dev_priv->mch_res.start));
944
945 pci_write_config_dword(dev_priv->bridge_dev, reg,
946 lower_32_bits(dev_priv->mch_res.start));
947 return 0;
948 }
949
950 /* Setup MCHBAR if possible, return true if we should disable it again */
951 static void
952 intel_setup_mchbar(struct drm_device *dev)
953 {
954 drm_i915_private_t *dev_priv = dev->dev_private;
955 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
956 u32 temp;
957 bool enabled;
958
959 dev_priv->mchbar_need_disable = false;
960
961 if (IS_I915G(dev) || IS_I915GM(dev)) {
962 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
963 enabled = !!(temp & DEVEN_MCHBAR_EN);
964 } else {
965 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
966 enabled = temp & 1;
967 }
968
969 /* If it's already enabled, don't have to do anything */
970 if (enabled)
971 return;
972
973 if (intel_alloc_mchbar_resource(dev))
974 return;
975
976 dev_priv->mchbar_need_disable = true;
977
978 /* Space is allocated or reserved, so enable it. */
979 if (IS_I915G(dev) || IS_I915GM(dev)) {
980 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
981 temp | DEVEN_MCHBAR_EN);
982 } else {
983 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
984 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
985 }
986 }
987
988 static void
989 intel_teardown_mchbar(struct drm_device *dev)
990 {
991 drm_i915_private_t *dev_priv = dev->dev_private;
992 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
993 u32 temp;
994
995 if (dev_priv->mchbar_need_disable) {
996 if (IS_I915G(dev) || IS_I915GM(dev)) {
997 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
998 temp &= ~DEVEN_MCHBAR_EN;
999 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1000 } else {
1001 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1002 temp &= ~1;
1003 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1004 }
1005 }
1006
1007 if (dev_priv->mch_res.start)
1008 release_resource(&dev_priv->mch_res);
1009 }
1010
1011 #define PTE_ADDRESS_MASK 0xfffff000
1012 #define PTE_ADDRESS_MASK_HIGH 0x000000f0 /* i915+ */
1013 #define PTE_MAPPING_TYPE_UNCACHED (0 << 1)
1014 #define PTE_MAPPING_TYPE_DCACHE (1 << 1) /* i830 only */
1015 #define PTE_MAPPING_TYPE_CACHED (3 << 1)
1016 #define PTE_MAPPING_TYPE_MASK (3 << 1)
1017 #define PTE_VALID (1 << 0)
1018
1019 /**
1020 * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1021 * a physical one
1022 * @dev: drm device
1023 * @offset: address to translate
1024 *
1025 * Some chip functions require allocations from stolen space and need the
1026 * physical address of the memory in question.
1027 */
1028 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1029 {
1030 struct drm_i915_private *dev_priv = dev->dev_private;
1031 struct pci_dev *pdev = dev_priv->bridge_dev;
1032 u32 base;
1033
1034 #if 0
1035 /* On the machines I have tested the Graphics Base of Stolen Memory
1036 * is unreliable, so compute the base by subtracting the stolen memory
1037 * from the Top of Low Usable DRAM which is where the BIOS places
1038 * the graphics stolen memory.
1039 */
1040 if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1041 /* top 32bits are reserved = 0 */
1042 pci_read_config_dword(pdev, 0xA4, &base);
1043 } else {
1044 /* XXX presume 8xx is the same as i915 */
1045 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1046 }
1047 #else
1048 if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1049 u16 val;
1050 pci_read_config_word(pdev, 0xb0, &val);
1051 base = val >> 4 << 20;
1052 } else {
1053 u8 val;
1054 pci_read_config_byte(pdev, 0x9c, &val);
1055 base = val >> 3 << 27;
1056 }
1057 base -= dev_priv->mm.gtt->stolen_size;
1058 #endif
1059
1060 return base + offset;
1061 }
1062
1063 static void i915_warn_stolen(struct drm_device *dev)
1064 {
1065 DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1066 DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1067 }
1068
1069 static void i915_setup_compression(struct drm_device *dev, int size)
1070 {
1071 struct drm_i915_private *dev_priv = dev->dev_private;
1072 struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1073 unsigned long cfb_base;
1074 unsigned long ll_base = 0;
1075
1076 compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1077 if (compressed_fb)
1078 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1079 if (!compressed_fb)
1080 goto err;
1081
1082 cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1083 if (!cfb_base)
1084 goto err_fb;
1085
1086 if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1087 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1088 4096, 4096, 0);
1089 if (compressed_llb)
1090 compressed_llb = drm_mm_get_block(compressed_llb,
1091 4096, 4096);
1092 if (!compressed_llb)
1093 goto err_fb;
1094
1095 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1096 if (!ll_base)
1097 goto err_llb;
1098 }
1099
1100 dev_priv->cfb_size = size;
1101
1102 intel_disable_fbc(dev);
1103 dev_priv->compressed_fb = compressed_fb;
1104 if (HAS_PCH_SPLIT(dev))
1105 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1106 else if (IS_GM45(dev)) {
1107 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1108 } else {
1109 I915_WRITE(FBC_CFB_BASE, cfb_base);
1110 I915_WRITE(FBC_LL_BASE, ll_base);
1111 dev_priv->compressed_llb = compressed_llb;
1112 }
1113
1114 DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1115 cfb_base, ll_base, size >> 20);
1116 return;
1117
1118 err_llb:
1119 drm_mm_put_block(compressed_llb);
1120 err_fb:
1121 drm_mm_put_block(compressed_fb);
1122 err:
1123 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1124 i915_warn_stolen(dev);
1125 }
1126
1127 static void i915_cleanup_compression(struct drm_device *dev)
1128 {
1129 struct drm_i915_private *dev_priv = dev->dev_private;
1130
1131 drm_mm_put_block(dev_priv->compressed_fb);
1132 if (dev_priv->compressed_llb)
1133 drm_mm_put_block(dev_priv->compressed_llb);
1134 }
1135
1136 /* true = enable decode, false = disable decoder */
1137 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1138 {
1139 struct drm_device *dev = cookie;
1140
1141 intel_modeset_vga_set_state(dev, state);
1142 if (state)
1143 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1144 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1145 else
1146 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1147 }
1148
1149 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1150 {
1151 struct drm_device *dev = pci_get_drvdata(pdev);
1152 pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1153 if (state == VGA_SWITCHEROO_ON) {
1154 printk(KERN_INFO "i915: switched on\n");
1155 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1156 /* i915 resume handler doesn't set to D0 */
1157 pci_set_power_state(dev->pdev, PCI_D0);
1158 i915_resume(dev);
1159 dev->switch_power_state = DRM_SWITCH_POWER_ON;
1160 } else {
1161 printk(KERN_ERR "i915: switched off\n");
1162 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1163 i915_suspend(dev, pmm);
1164 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1165 }
1166 }
1167
1168 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1169 {
1170 struct drm_device *dev = pci_get_drvdata(pdev);
1171 bool can_switch;
1172
1173 spin_lock(&dev->count_lock);
1174 can_switch = (dev->open_count == 0);
1175 spin_unlock(&dev->count_lock);
1176 return can_switch;
1177 }
1178
1179 static int i915_load_gem_init(struct drm_device *dev)
1180 {
1181 struct drm_i915_private *dev_priv = dev->dev_private;
1182 unsigned long prealloc_size, gtt_size, mappable_size;
1183 int ret;
1184
1185 prealloc_size = dev_priv->mm.gtt->stolen_size;
1186 gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1187 mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1188
1189 /* Basic memrange allocator for stolen space */
1190 drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1191
1192 /* Let GEM Manage all of the aperture.
1193 *
1194 * However, leave one page at the end still bound to the scratch page.
1195 * There are a number of places where the hardware apparently
1196 * prefetches past the end of the object, and we've seen multiple
1197 * hangs with the GPU head pointer stuck in a batchbuffer bound
1198 * at the last page of the aperture. One page should be enough to
1199 * keep any prefetching inside of the aperture.
1200 */
1201 i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1202
1203 mutex_lock(&dev->struct_mutex);
1204 ret = i915_gem_init_ringbuffer(dev);
1205 mutex_unlock(&dev->struct_mutex);
1206 if (ret)
1207 return ret;
1208
1209 /* Try to set up FBC with a reasonable compressed buffer size */
1210 if (I915_HAS_FBC(dev) && i915_powersave) {
1211 int cfb_size;
1212
1213 /* Leave 1M for line length buffer & misc. */
1214
1215 /* Try to get a 32M buffer... */
1216 if (prealloc_size > (36*1024*1024))
1217 cfb_size = 32*1024*1024;
1218 else /* fall back to 7/8 of the stolen space */
1219 cfb_size = prealloc_size * 7 / 8;
1220 i915_setup_compression(dev, cfb_size);
1221 }
1222
1223 /* Allow hardware batchbuffers unless told otherwise. */
1224 dev_priv->allow_batchbuffer = 1;
1225 return 0;
1226 }
1227
1228 static int i915_load_modeset_init(struct drm_device *dev)
1229 {
1230 struct drm_i915_private *dev_priv = dev->dev_private;
1231 int ret;
1232
1233 ret = intel_parse_bios(dev);
1234 if (ret)
1235 DRM_INFO("failed to find VBIOS tables\n");
1236
1237 /* If we have > 1 VGA cards, then we need to arbitrate access
1238 * to the common VGA resources.
1239 *
1240 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
1241 * then we do not take part in VGA arbitration and the
1242 * vga_client_register() fails with -ENODEV.
1243 */
1244 ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1245 if (ret && ret != -ENODEV)
1246 goto out;
1247
1248 intel_register_dsm_handler();
1249
1250 ret = vga_switcheroo_register_client(dev->pdev,
1251 i915_switcheroo_set_state,
1252 NULL,
1253 i915_switcheroo_can_switch);
1254 if (ret)
1255 goto cleanup_vga_client;
1256
1257 /* IIR "flip pending" bit means done if this bit is set */
1258 if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1259 dev_priv->flip_pending_is_done = true;
1260
1261 intel_modeset_init(dev);
1262
1263 ret = i915_load_gem_init(dev);
1264 if (ret)
1265 goto cleanup_vga_switcheroo;
1266
1267 intel_modeset_gem_init(dev);
1268
1269 if (IS_IVYBRIDGE(dev)) {
1270 /* Share pre & uninstall handlers with ILK/SNB */
1271 dev->driver->irq_handler = ivybridge_irq_handler;
1272 dev->driver->irq_preinstall = ironlake_irq_preinstall;
1273 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
1274 dev->driver->irq_uninstall = ironlake_irq_uninstall;
1275 dev->driver->enable_vblank = ivybridge_enable_vblank;
1276 dev->driver->disable_vblank = ivybridge_disable_vblank;
1277 } else if (HAS_PCH_SPLIT(dev)) {
1278 dev->driver->irq_handler = ironlake_irq_handler;
1279 dev->driver->irq_preinstall = ironlake_irq_preinstall;
1280 dev->driver->irq_postinstall = ironlake_irq_postinstall;
1281 dev->driver->irq_uninstall = ironlake_irq_uninstall;
1282 dev->driver->enable_vblank = ironlake_enable_vblank;
1283 dev->driver->disable_vblank = ironlake_disable_vblank;
1284 } else {
1285 dev->driver->irq_preinstall = i915_driver_irq_preinstall;
1286 dev->driver->irq_postinstall = i915_driver_irq_postinstall;
1287 dev->driver->irq_uninstall = i915_driver_irq_uninstall;
1288 dev->driver->irq_handler = i915_driver_irq_handler;
1289 dev->driver->enable_vblank = i915_enable_vblank;
1290 dev->driver->disable_vblank = i915_disable_vblank;
1291 }
1292
1293 ret = drm_irq_install(dev);
1294 if (ret)
1295 goto cleanup_gem;
1296
1297 /* Always safe in the mode setting case. */
1298 /* FIXME: do pre/post-mode set stuff in core KMS code */
1299 dev->vblank_disable_allowed = 1;
1300
1301 ret = intel_fbdev_init(dev);
1302 if (ret)
1303 goto cleanup_irq;
1304
1305 drm_kms_helper_poll_init(dev);
1306
1307 /* We're off and running w/KMS */
1308 dev_priv->mm.suspended = 0;
1309
1310 return 0;
1311
1312 cleanup_irq:
1313 drm_irq_uninstall(dev);
1314 cleanup_gem:
1315 mutex_lock(&dev->struct_mutex);
1316 i915_gem_cleanup_ringbuffer(dev);
1317 mutex_unlock(&dev->struct_mutex);
1318 cleanup_vga_switcheroo:
1319 vga_switcheroo_unregister_client(dev->pdev);
1320 cleanup_vga_client:
1321 vga_client_register(dev->pdev, NULL, NULL, NULL);
1322 out:
1323 return ret;
1324 }
1325
1326 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1327 {
1328 struct drm_i915_master_private *master_priv;
1329
1330 master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1331 if (!master_priv)
1332 return -ENOMEM;
1333
1334 master->driver_priv = master_priv;
1335 return 0;
1336 }
1337
1338 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1339 {
1340 struct drm_i915_master_private *master_priv = master->driver_priv;
1341
1342 if (!master_priv)
1343 return;
1344
1345 kfree(master_priv);
1346
1347 master->driver_priv = NULL;
1348 }
1349
1350 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1351 {
1352 drm_i915_private_t *dev_priv = dev->dev_private;
1353 u32 tmp;
1354
1355 tmp = I915_READ(CLKCFG);
1356
1357 switch (tmp & CLKCFG_FSB_MASK) {
1358 case CLKCFG_FSB_533:
1359 dev_priv->fsb_freq = 533; /* 133*4 */
1360 break;
1361 case CLKCFG_FSB_800:
1362 dev_priv->fsb_freq = 800; /* 200*4 */
1363 break;
1364 case CLKCFG_FSB_667:
1365 dev_priv->fsb_freq = 667; /* 167*4 */
1366 break;
1367 case CLKCFG_FSB_400:
1368 dev_priv->fsb_freq = 400; /* 100*4 */
1369 break;
1370 }
1371
1372 switch (tmp & CLKCFG_MEM_MASK) {
1373 case CLKCFG_MEM_533:
1374 dev_priv->mem_freq = 533;
1375 break;
1376 case CLKCFG_MEM_667:
1377 dev_priv->mem_freq = 667;
1378 break;
1379 case CLKCFG_MEM_800:
1380 dev_priv->mem_freq = 800;
1381 break;
1382 }
1383
1384 /* detect pineview DDR3 setting */
1385 tmp = I915_READ(CSHRDDR3CTL);
1386 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1387 }
1388
1389 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1390 {
1391 drm_i915_private_t *dev_priv = dev->dev_private;
1392 u16 ddrpll, csipll;
1393
1394 ddrpll = I915_READ16(DDRMPLL1);
1395 csipll = I915_READ16(CSIPLL0);
1396
1397 switch (ddrpll & 0xff) {
1398 case 0xc:
1399 dev_priv->mem_freq = 800;
1400 break;
1401 case 0x10:
1402 dev_priv->mem_freq = 1066;
1403 break;
1404 case 0x14:
1405 dev_priv->mem_freq = 1333;
1406 break;
1407 case 0x18:
1408 dev_priv->mem_freq = 1600;
1409 break;
1410 default:
1411 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1412 ddrpll & 0xff);
1413 dev_priv->mem_freq = 0;
1414 break;
1415 }
1416
1417 dev_priv->r_t = dev_priv->mem_freq;
1418
1419 switch (csipll & 0x3ff) {
1420 case 0x00c:
1421 dev_priv->fsb_freq = 3200;
1422 break;
1423 case 0x00e:
1424 dev_priv->fsb_freq = 3733;
1425 break;
1426 case 0x010:
1427 dev_priv->fsb_freq = 4266;
1428 break;
1429 case 0x012:
1430 dev_priv->fsb_freq = 4800;
1431 break;
1432 case 0x014:
1433 dev_priv->fsb_freq = 5333;
1434 break;
1435 case 0x016:
1436 dev_priv->fsb_freq = 5866;
1437 break;
1438 case 0x018:
1439 dev_priv->fsb_freq = 6400;
1440 break;
1441 default:
1442 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1443 csipll & 0x3ff);
1444 dev_priv->fsb_freq = 0;
1445 break;
1446 }
1447
1448 if (dev_priv->fsb_freq == 3200) {
1449 dev_priv->c_m = 0;
1450 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1451 dev_priv->c_m = 1;
1452 } else {
1453 dev_priv->c_m = 2;
1454 }
1455 }
1456
1457 static const struct cparams {
1458 u16 i;
1459 u16 t;
1460 u16 m;
1461 u16 c;
1462 } cparams[] = {
1463 { 1, 1333, 301, 28664 },
1464 { 1, 1066, 294, 24460 },
1465 { 1, 800, 294, 25192 },
1466 { 0, 1333, 276, 27605 },
1467 { 0, 1066, 276, 27605 },
1468 { 0, 800, 231, 23784 },
1469 };
1470
1471 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1472 {
1473 u64 total_count, diff, ret;
1474 u32 count1, count2, count3, m = 0, c = 0;
1475 unsigned long now = jiffies_to_msecs(jiffies), diff1;
1476 int i;
1477
1478 diff1 = now - dev_priv->last_time1;
1479
1480 count1 = I915_READ(DMIEC);
1481 count2 = I915_READ(DDREC);
1482 count3 = I915_READ(CSIEC);
1483
1484 total_count = count1 + count2 + count3;
1485
1486 /* FIXME: handle per-counter overflow */
1487 if (total_count < dev_priv->last_count1) {
1488 diff = ~0UL - dev_priv->last_count1;
1489 diff += total_count;
1490 } else {
1491 diff = total_count - dev_priv->last_count1;
1492 }
1493
1494 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1495 if (cparams[i].i == dev_priv->c_m &&
1496 cparams[i].t == dev_priv->r_t) {
1497 m = cparams[i].m;
1498 c = cparams[i].c;
1499 break;
1500 }
1501 }
1502
1503 diff = div_u64(diff, diff1);
1504 ret = ((m * diff) + c);
1505 ret = div_u64(ret, 10);
1506
1507 dev_priv->last_count1 = total_count;
1508 dev_priv->last_time1 = now;
1509
1510 return ret;
1511 }
1512
1513 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1514 {
1515 unsigned long m, x, b;
1516 u32 tsfs;
1517
1518 tsfs = I915_READ(TSFS);
1519
1520 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1521 x = I915_READ8(TR1);
1522
1523 b = tsfs & TSFS_INTR_MASK;
1524
1525 return ((m * x) / 127) - b;
1526 }
1527
1528 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1529 {
1530 static const struct v_table {
1531 u16 vd; /* in .1 mil */
1532 u16 vm; /* in .1 mil */
1533 } v_table[] = {
1534 { 0, 0, },
1535 { 375, 0, },
1536 { 500, 0, },
1537 { 625, 0, },
1538 { 750, 0, },
1539 { 875, 0, },
1540 { 1000, 0, },
1541 { 1125, 0, },
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 { 4125, 3000, },
1560 { 4125, 3000, },
1561 { 4125, 3000, },
1562 { 4125, 3000, },
1563 { 4125, 3000, },
1564 { 4125, 3000, },
1565 { 4125, 3000, },
1566 { 4250, 3125, },
1567 { 4375, 3250, },
1568 { 4500, 3375, },
1569 { 4625, 3500, },
1570 { 4750, 3625, },
1571 { 4875, 3750, },
1572 { 5000, 3875, },
1573 { 5125, 4000, },
1574 { 5250, 4125, },
1575 { 5375, 4250, },
1576 { 5500, 4375, },
1577 { 5625, 4500, },
1578 { 5750, 4625, },
1579 { 5875, 4750, },
1580 { 6000, 4875, },
1581 { 6125, 5000, },
1582 { 6250, 5125, },
1583 { 6375, 5250, },
1584 { 6500, 5375, },
1585 { 6625, 5500, },
1586 { 6750, 5625, },
1587 { 6875, 5750, },
1588 { 7000, 5875, },
1589 { 7125, 6000, },
1590 { 7250, 6125, },
1591 { 7375, 6250, },
1592 { 7500, 6375, },
1593 { 7625, 6500, },
1594 { 7750, 6625, },
1595 { 7875, 6750, },
1596 { 8000, 6875, },
1597 { 8125, 7000, },
1598 { 8250, 7125, },
1599 { 8375, 7250, },
1600 { 8500, 7375, },
1601 { 8625, 7500, },
1602 { 8750, 7625, },
1603 { 8875, 7750, },
1604 { 9000, 7875, },
1605 { 9125, 8000, },
1606 { 9250, 8125, },
1607 { 9375, 8250, },
1608 { 9500, 8375, },
1609 { 9625, 8500, },
1610 { 9750, 8625, },
1611 { 9875, 8750, },
1612 { 10000, 8875, },
1613 { 10125, 9000, },
1614 { 10250, 9125, },
1615 { 10375, 9250, },
1616 { 10500, 9375, },
1617 { 10625, 9500, },
1618 { 10750, 9625, },
1619 { 10875, 9750, },
1620 { 11000, 9875, },
1621 { 11125, 10000, },
1622 { 11250, 10125, },
1623 { 11375, 10250, },
1624 { 11500, 10375, },
1625 { 11625, 10500, },
1626 { 11750, 10625, },
1627 { 11875, 10750, },
1628 { 12000, 10875, },
1629 { 12125, 11000, },
1630 { 12250, 11125, },
1631 { 12375, 11250, },
1632 { 12500, 11375, },
1633 { 12625, 11500, },
1634 { 12750, 11625, },
1635 { 12875, 11750, },
1636 { 13000, 11875, },
1637 { 13125, 12000, },
1638 { 13250, 12125, },
1639 { 13375, 12250, },
1640 { 13500, 12375, },
1641 { 13625, 12500, },
1642 { 13750, 12625, },
1643 { 13875, 12750, },
1644 { 14000, 12875, },
1645 { 14125, 13000, },
1646 { 14250, 13125, },
1647 { 14375, 13250, },
1648 { 14500, 13375, },
1649 { 14625, 13500, },
1650 { 14750, 13625, },
1651 { 14875, 13750, },
1652 { 15000, 13875, },
1653 { 15125, 14000, },
1654 { 15250, 14125, },
1655 { 15375, 14250, },
1656 { 15500, 14375, },
1657 { 15625, 14500, },
1658 { 15750, 14625, },
1659 { 15875, 14750, },
1660 { 16000, 14875, },
1661 { 16125, 15000, },
1662 };
1663 if (dev_priv->info->is_mobile)
1664 return v_table[pxvid].vm;
1665 else
1666 return v_table[pxvid].vd;
1667 }
1668
1669 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1670 {
1671 struct timespec now, diff1;
1672 u64 diff;
1673 unsigned long diffms;
1674 u32 count;
1675
1676 getrawmonotonic(&now);
1677 diff1 = timespec_sub(now, dev_priv->last_time2);
1678
1679 /* Don't divide by 0 */
1680 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1681 if (!diffms)
1682 return;
1683
1684 count = I915_READ(GFXEC);
1685
1686 if (count < dev_priv->last_count2) {
1687 diff = ~0UL - dev_priv->last_count2;
1688 diff += count;
1689 } else {
1690 diff = count - dev_priv->last_count2;
1691 }
1692
1693 dev_priv->last_count2 = count;
1694 dev_priv->last_time2 = now;
1695
1696 /* More magic constants... */
1697 diff = diff * 1181;
1698 diff = div_u64(diff, diffms * 10);
1699 dev_priv->gfx_power = diff;
1700 }
1701
1702 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1703 {
1704 unsigned long t, corr, state1, corr2, state2;
1705 u32 pxvid, ext_v;
1706
1707 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1708 pxvid = (pxvid >> 24) & 0x7f;
1709 ext_v = pvid_to_extvid(dev_priv, pxvid);
1710
1711 state1 = ext_v;
1712
1713 t = i915_mch_val(dev_priv);
1714
1715 /* Revel in the empirically derived constants */
1716
1717 /* Correction factor in 1/100000 units */
1718 if (t > 80)
1719 corr = ((t * 2349) + 135940);
1720 else if (t >= 50)
1721 corr = ((t * 964) + 29317);
1722 else /* < 50 */
1723 corr = ((t * 301) + 1004);
1724
1725 corr = corr * ((150142 * state1) / 10000 - 78642);
1726 corr /= 100000;
1727 corr2 = (corr * dev_priv->corr);
1728
1729 state2 = (corr2 * state1) / 10000;
1730 state2 /= 100; /* convert to mW */
1731
1732 i915_update_gfx_val(dev_priv);
1733
1734 return dev_priv->gfx_power + state2;
1735 }
1736
1737 /* Global for IPS driver to get at the current i915 device */
1738 static struct drm_i915_private *i915_mch_dev;
1739 /*
1740 * Lock protecting IPS related data structures
1741 * - i915_mch_dev
1742 * - dev_priv->max_delay
1743 * - dev_priv->min_delay
1744 * - dev_priv->fmax
1745 * - dev_priv->gpu_busy
1746 */
1747 static DEFINE_SPINLOCK(mchdev_lock);
1748
1749 /**
1750 * i915_read_mch_val - return value for IPS use
1751 *
1752 * Calculate and return a value for the IPS driver to use when deciding whether
1753 * we have thermal and power headroom to increase CPU or GPU power budget.
1754 */
1755 unsigned long i915_read_mch_val(void)
1756 {
1757 struct drm_i915_private *dev_priv;
1758 unsigned long chipset_val, graphics_val, ret = 0;
1759
1760 spin_lock(&mchdev_lock);
1761 if (!i915_mch_dev)
1762 goto out_unlock;
1763 dev_priv = i915_mch_dev;
1764
1765 chipset_val = i915_chipset_val(dev_priv);
1766 graphics_val = i915_gfx_val(dev_priv);
1767
1768 ret = chipset_val + graphics_val;
1769
1770 out_unlock:
1771 spin_unlock(&mchdev_lock);
1772
1773 return ret;
1774 }
1775 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1776
1777 /**
1778 * i915_gpu_raise - raise GPU frequency limit
1779 *
1780 * Raise the limit; IPS indicates we have thermal headroom.
1781 */
1782 bool i915_gpu_raise(void)
1783 {
1784 struct drm_i915_private *dev_priv;
1785 bool ret = true;
1786
1787 spin_lock(&mchdev_lock);
1788 if (!i915_mch_dev) {
1789 ret = false;
1790 goto out_unlock;
1791 }
1792 dev_priv = i915_mch_dev;
1793
1794 if (dev_priv->max_delay > dev_priv->fmax)
1795 dev_priv->max_delay--;
1796
1797 out_unlock:
1798 spin_unlock(&mchdev_lock);
1799
1800 return ret;
1801 }
1802 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1803
1804 /**
1805 * i915_gpu_lower - lower GPU frequency limit
1806 *
1807 * IPS indicates we're close to a thermal limit, so throttle back the GPU
1808 * frequency maximum.
1809 */
1810 bool i915_gpu_lower(void)
1811 {
1812 struct drm_i915_private *dev_priv;
1813 bool ret = true;
1814
1815 spin_lock(&mchdev_lock);
1816 if (!i915_mch_dev) {
1817 ret = false;
1818 goto out_unlock;
1819 }
1820 dev_priv = i915_mch_dev;
1821
1822 if (dev_priv->max_delay < dev_priv->min_delay)
1823 dev_priv->max_delay++;
1824
1825 out_unlock:
1826 spin_unlock(&mchdev_lock);
1827
1828 return ret;
1829 }
1830 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1831
1832 /**
1833 * i915_gpu_busy - indicate GPU business to IPS
1834 *
1835 * Tell the IPS driver whether or not the GPU is busy.
1836 */
1837 bool i915_gpu_busy(void)
1838 {
1839 struct drm_i915_private *dev_priv;
1840 bool ret = false;
1841
1842 spin_lock(&mchdev_lock);
1843 if (!i915_mch_dev)
1844 goto out_unlock;
1845 dev_priv = i915_mch_dev;
1846
1847 ret = dev_priv->busy;
1848
1849 out_unlock:
1850 spin_unlock(&mchdev_lock);
1851
1852 return ret;
1853 }
1854 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1855
1856 /**
1857 * i915_gpu_turbo_disable - disable graphics turbo
1858 *
1859 * Disable graphics turbo by resetting the max frequency and setting the
1860 * current frequency to the default.
1861 */
1862 bool i915_gpu_turbo_disable(void)
1863 {
1864 struct drm_i915_private *dev_priv;
1865 bool ret = true;
1866
1867 spin_lock(&mchdev_lock);
1868 if (!i915_mch_dev) {
1869 ret = false;
1870 goto out_unlock;
1871 }
1872 dev_priv = i915_mch_dev;
1873
1874 dev_priv->max_delay = dev_priv->fstart;
1875
1876 if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1877 ret = false;
1878
1879 out_unlock:
1880 spin_unlock(&mchdev_lock);
1881
1882 return ret;
1883 }
1884 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1885
1886 /**
1887 * Tells the intel_ips driver that the i915 driver is now loaded, if
1888 * IPS got loaded first.
1889 *
1890 * This awkward dance is so that neither module has to depend on the
1891 * other in order for IPS to do the appropriate communication of
1892 * GPU turbo limits to i915.
1893 */
1894 static void
1895 ips_ping_for_i915_load(void)
1896 {
1897 void (*link)(void);
1898
1899 link = symbol_get(ips_link_to_i915_driver);
1900 if (link) {
1901 link();
1902 symbol_put(ips_link_to_i915_driver);
1903 }
1904 }
1905
1906 /**
1907 * i915_driver_load - setup chip and create an initial config
1908 * @dev: DRM device
1909 * @flags: startup flags
1910 *
1911 * The driver load routine has to do several things:
1912 * - drive output discovery via intel_modeset_init()
1913 * - initialize the memory manager
1914 * - allocate initial config memory
1915 * - setup the DRM framebuffer with the allocated memory
1916 */
1917 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1918 {
1919 struct drm_i915_private *dev_priv;
1920 int ret = 0, mmio_bar;
1921 uint32_t agp_size;
1922
1923 /* i915 has 4 more counters */
1924 dev->counters += 4;
1925 dev->types[6] = _DRM_STAT_IRQ;
1926 dev->types[7] = _DRM_STAT_PRIMARY;
1927 dev->types[8] = _DRM_STAT_SECONDARY;
1928 dev->types[9] = _DRM_STAT_DMA;
1929
1930 dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1931 if (dev_priv == NULL)
1932 return -ENOMEM;
1933
1934 dev->dev_private = (void *)dev_priv;
1935 dev_priv->dev = dev;
1936 dev_priv->info = (struct intel_device_info *) flags;
1937
1938 if (i915_get_bridge_dev(dev)) {
1939 ret = -EIO;
1940 goto free_priv;
1941 }
1942
1943 /* overlay on gen2 is broken and can't address above 1G */
1944 if (IS_GEN2(dev))
1945 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1946
1947 /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1948 * using 32bit addressing, overwriting memory if HWS is located
1949 * above 4GB.
1950 *
1951 * The documentation also mentions an issue with undefined
1952 * behaviour if any general state is accessed within a page above 4GB,
1953 * which also needs to be handled carefully.
1954 */
1955 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1956 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
1957
1958 mmio_bar = IS_GEN2(dev) ? 1 : 0;
1959 dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1960 if (!dev_priv->regs) {
1961 DRM_ERROR("failed to map registers\n");
1962 ret = -EIO;
1963 goto put_bridge;
1964 }
1965
1966 dev_priv->mm.gtt = intel_gtt_get();
1967 if (!dev_priv->mm.gtt) {
1968 DRM_ERROR("Failed to initialize GTT\n");
1969 ret = -ENODEV;
1970 goto out_iomapfree;
1971 }
1972
1973 agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1974
1975 dev_priv->mm.gtt_mapping =
1976 io_mapping_create_wc(dev->agp->base, agp_size);
1977 if (dev_priv->mm.gtt_mapping == NULL) {
1978 ret = -EIO;
1979 goto out_rmmap;
1980 }
1981
1982 /* Set up a WC MTRR for non-PAT systems. This is more common than
1983 * one would think, because the kernel disables PAT on first
1984 * generation Core chips because WC PAT gets overridden by a UC
1985 * MTRR if present. Even if a UC MTRR isn't present.
1986 */
1987 dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1988 agp_size,
1989 MTRR_TYPE_WRCOMB, 1);
1990 if (dev_priv->mm.gtt_mtrr < 0) {
1991 DRM_INFO("MTRR allocation failed. Graphics "
1992 "performance may suffer.\n");
1993 }
1994
1995 /* The i915 workqueue is primarily used for batched retirement of
1996 * requests (and thus managing bo) once the task has been completed
1997 * by the GPU. i915_gem_retire_requests() is called directly when we
1998 * need high-priority retirement, such as waiting for an explicit
1999 * bo.
2000 *
2001 * It is also used for periodic low-priority events, such as
2002 * idle-timers and recording error state.
2003 *
2004 * All tasks on the workqueue are expected to acquire the dev mutex
2005 * so there is no point in running more than one instance of the
2006 * workqueue at any time: max_active = 1 and NON_REENTRANT.
2007 */
2008 dev_priv->wq = alloc_workqueue("i915",
2009 WQ_UNBOUND | WQ_NON_REENTRANT,
2010 1);
2011 if (dev_priv->wq == NULL) {
2012 DRM_ERROR("Failed to create our workqueue.\n");
2013 ret = -ENOMEM;
2014 goto out_iomapfree;
2015 }
2016
2017 /* enable GEM by default */
2018 dev_priv->has_gem = 1;
2019
2020 dev->driver->get_vblank_counter = i915_get_vblank_counter;
2021 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2022 if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
2023 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2024 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2025 }
2026
2027 /* Try to make sure MCHBAR is enabled before poking at it */
2028 intel_setup_mchbar(dev);
2029 intel_setup_gmbus(dev);
2030 intel_opregion_setup(dev);
2031
2032 /* Make sure the bios did its job and set up vital registers */
2033 intel_setup_bios(dev);
2034
2035 i915_gem_load(dev);
2036
2037 /* Init HWS */
2038 if (!I915_NEED_GFX_HWS(dev)) {
2039 ret = i915_init_phys_hws(dev);
2040 if (ret)
2041 goto out_gem_unload;
2042 }
2043
2044 if (IS_PINEVIEW(dev))
2045 i915_pineview_get_mem_freq(dev);
2046 else if (IS_GEN5(dev))
2047 i915_ironlake_get_mem_freq(dev);
2048
2049 /* On the 945G/GM, the chipset reports the MSI capability on the
2050 * integrated graphics even though the support isn't actually there
2051 * according to the published specs. It doesn't appear to function
2052 * correctly in testing on 945G.
2053 * This may be a side effect of MSI having been made available for PEG
2054 * and the registers being closely associated.
2055 *
2056 * According to chipset errata, on the 965GM, MSI interrupts may
2057 * be lost or delayed, but we use them anyways to avoid
2058 * stuck interrupts on some machines.
2059 */
2060 if (!IS_I945G(dev) && !IS_I945GM(dev))
2061 pci_enable_msi(dev->pdev);
2062
2063 spin_lock_init(&dev_priv->irq_lock);
2064 spin_lock_init(&dev_priv->error_lock);
2065 spin_lock_init(&dev_priv->rps_lock);
2066
2067 if (IS_MOBILE(dev) || !IS_GEN2(dev))
2068 dev_priv->num_pipe = 2;
2069 else
2070 dev_priv->num_pipe = 1;
2071
2072 ret = drm_vblank_init(dev, dev_priv->num_pipe);
2073 if (ret)
2074 goto out_gem_unload;
2075
2076 /* Start out suspended */
2077 dev_priv->mm.suspended = 1;
2078
2079 intel_detect_pch(dev);
2080
2081 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2082 ret = i915_load_modeset_init(dev);
2083 if (ret < 0) {
2084 DRM_ERROR("failed to init modeset\n");
2085 goto out_gem_unload;
2086 }
2087 }
2088
2089 /* Must be done after probing outputs */
2090 intel_opregion_init(dev);
2091 acpi_video_register();
2092
2093 setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2094 (unsigned long) dev);
2095
2096 spin_lock(&mchdev_lock);
2097 i915_mch_dev = dev_priv;
2098 dev_priv->mchdev_lock = &mchdev_lock;
2099 spin_unlock(&mchdev_lock);
2100
2101 ips_ping_for_i915_load();
2102
2103 return 0;
2104
2105 out_gem_unload:
2106 if (dev->pdev->msi_enabled)
2107 pci_disable_msi(dev->pdev);
2108
2109 intel_teardown_gmbus(dev);
2110 intel_teardown_mchbar(dev);
2111 destroy_workqueue(dev_priv->wq);
2112 out_iomapfree:
2113 io_mapping_free(dev_priv->mm.gtt_mapping);
2114 out_rmmap:
2115 pci_iounmap(dev->pdev, dev_priv->regs);
2116 put_bridge:
2117 pci_dev_put(dev_priv->bridge_dev);
2118 free_priv:
2119 kfree(dev_priv);
2120 return ret;
2121 }
2122
2123 int i915_driver_unload(struct drm_device *dev)
2124 {
2125 struct drm_i915_private *dev_priv = dev->dev_private;
2126 int ret;
2127
2128 spin_lock(&mchdev_lock);
2129 i915_mch_dev = NULL;
2130 spin_unlock(&mchdev_lock);
2131
2132 if (dev_priv->mm.inactive_shrinker.shrink)
2133 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2134
2135 mutex_lock(&dev->struct_mutex);
2136 ret = i915_gpu_idle(dev);
2137 if (ret)
2138 DRM_ERROR("failed to idle hardware: %d\n", ret);
2139 mutex_unlock(&dev->struct_mutex);
2140
2141 /* Cancel the retire work handler, which should be idle now. */
2142 cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2143
2144 io_mapping_free(dev_priv->mm.gtt_mapping);
2145 if (dev_priv->mm.gtt_mtrr >= 0) {
2146 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2147 dev->agp->agp_info.aper_size * 1024 * 1024);
2148 dev_priv->mm.gtt_mtrr = -1;
2149 }
2150
2151 acpi_video_unregister();
2152
2153 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2154 intel_fbdev_fini(dev);
2155 intel_modeset_cleanup(dev);
2156
2157 /*
2158 * free the memory space allocated for the child device
2159 * config parsed from VBT
2160 */
2161 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2162 kfree(dev_priv->child_dev);
2163 dev_priv->child_dev = NULL;
2164 dev_priv->child_dev_num = 0;
2165 }
2166
2167 vga_switcheroo_unregister_client(dev->pdev);
2168 vga_client_register(dev->pdev, NULL, NULL, NULL);
2169 }
2170
2171 /* Free error state after interrupts are fully disabled. */
2172 del_timer_sync(&dev_priv->hangcheck_timer);
2173 cancel_work_sync(&dev_priv->error_work);
2174 i915_destroy_error_state(dev);
2175
2176 if (dev->pdev->msi_enabled)
2177 pci_disable_msi(dev->pdev);
2178
2179 intel_opregion_fini(dev);
2180
2181 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2182 /* Flush any outstanding unpin_work. */
2183 flush_workqueue(dev_priv->wq);
2184
2185 i915_gem_free_all_phys_object(dev);
2186
2187 mutex_lock(&dev->struct_mutex);
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 if (dev_priv->agp_heap)
2256 i915_mem_takedown(&(dev_priv->agp_heap));
2257
2258 i915_dma_cleanup(dev);
2259 }
2260
2261 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2262 {
2263 drm_i915_private_t *dev_priv = dev->dev_private;
2264 i915_gem_release(dev, file_priv);
2265 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2266 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2267 }
2268
2269 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2270 {
2271 struct drm_i915_file_private *file_priv = file->driver_priv;
2272
2273 kfree(file_priv);
2274 }
2275
2276 struct drm_ioctl_desc i915_ioctls[] = {
2277 DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2278 DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2279 DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2280 DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2281 DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2282 DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2283 DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2284 DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2285 DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2286 DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2287 DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2288 DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2289 DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2290 DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2291 DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, i915_vblank_pipe_get, DRM_AUTH),
2292 DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2293 DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2294 DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2295 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2296 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2297 DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2298 DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2299 DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2300 DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2301 DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2302 DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2303 DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2304 DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2305 DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2306 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2307 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2308 DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2309 DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2310 DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2311 DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2312 DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2313 DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2314 DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2315 DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2316 DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2317 };
2318
2319 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2320
2321 /**
2322 * Determine if the device really is AGP or not.
2323 *
2324 * All Intel graphics chipsets are treated as AGP, even if they are really
2325 * PCI-e.
2326 *
2327 * \param dev The device to be tested.
2328 *
2329 * \returns
2330 * A value of 1 is always retured to indictate every i9x5 is AGP.
2331 */
2332 int i915_driver_device_is_agp(struct drm_device * dev)
2333 {
2334 return 1;
2335 }
Linux kernel - Deliverables
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