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drm/i915: prevent division by zero when asking for chipset power
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / gpu / drm / i915 / i915_dma.c
blobc72b590f7d81f3f4f9f0d5e4a8f1bed86ff2f1d5
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
65 /* Program Hardware Status Page */
66 dev_priv->status_page_dmah =
67 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
68
69 if (!dev_priv->status_page_dmah) {
70 DRM_ERROR("Can not allocate hardware status page\n");
71 return -ENOMEM;
72 }
73
74 memset_io((void __force __iomem *)dev_priv->status_page_dmah->vaddr,
75 0, PAGE_SIZE);
76
77 i915_write_hws_pga(dev);
78
79 DRM_DEBUG_DRIVER("Enabled hardware status page\n");
80 return 0;
81 }
82
83 /**
84 * Frees the hardware status page, whether it's a physical address or a virtual
85 * address set up by the X Server.
86 */
87 static void i915_free_hws(struct drm_device *dev)
88 {
89 drm_i915_private_t *dev_priv = dev->dev_private;
90 struct intel_ring_buffer *ring = LP_RING(dev_priv);
91
92 if (dev_priv->status_page_dmah) {
93 drm_pci_free(dev, dev_priv->status_page_dmah);
94 dev_priv->status_page_dmah = NULL;
95 }
96
97 if (ring->status_page.gfx_addr) {
98 ring->status_page.gfx_addr = 0;
99 drm_core_ioremapfree(&dev_priv->hws_map, dev);
100 }
101
102 /* Need to rewrite hardware status page */
103 I915_WRITE(HWS_PGA, 0x1ffff000);
104 }
105
106 void i915_kernel_lost_context(struct drm_device * dev)
107 {
108 drm_i915_private_t *dev_priv = dev->dev_private;
109 struct drm_i915_master_private *master_priv;
110 struct intel_ring_buffer *ring = LP_RING(dev_priv);
111
112 /*
113 * We should never lose context on the ring with modesetting
114 * as we don't expose it to userspace
115 */
116 if (drm_core_check_feature(dev, DRIVER_MODESET))
117 return;
118
119 ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
120 ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
121 ring->space = ring->head - (ring->tail + 8);
122 if (ring->space < 0)
123 ring->space += ring->size;
124
125 if (!dev->primary->master)
126 return;
127
128 master_priv = dev->primary->master->driver_priv;
129 if (ring->head == ring->tail && master_priv->sarea_priv)
130 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
131 }
132
133 static int i915_dma_cleanup(struct drm_device * dev)
134 {
135 drm_i915_private_t *dev_priv = dev->dev_private;
136 int i;
137
138 /* Make sure interrupts are disabled here because the uninstall ioctl
139 * may not have been called from userspace and after dev_private
140 * is freed, it's too late.
141 */
142 if (dev->irq_enabled)
143 drm_irq_uninstall(dev);
144
145 mutex_lock(&dev->struct_mutex);
146 for (i = 0; i < I915_NUM_RINGS; i++)
147 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
148 mutex_unlock(&dev->struct_mutex);
149
150 /* Clear the HWS virtual address at teardown */
151 if (I915_NEED_GFX_HWS(dev))
152 i915_free_hws(dev);
153
154 return 0;
155 }
156
157 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
158 {
159 drm_i915_private_t *dev_priv = dev->dev_private;
160 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
161 int ret;
162
163 master_priv->sarea = drm_getsarea(dev);
164 if (master_priv->sarea) {
165 master_priv->sarea_priv = (drm_i915_sarea_t *)
166 ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
167 } else {
168 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
169 }
170
171 if (init->ring_size != 0) {
172 if (LP_RING(dev_priv)->obj != NULL) {
173 i915_dma_cleanup(dev);
174 DRM_ERROR("Client tried to initialize ringbuffer in "
175 "GEM mode\n");
176 return -EINVAL;
177 }
178
179 ret = intel_render_ring_init_dri(dev,
180 init->ring_start,
181 init->ring_size);
182 if (ret) {
183 i915_dma_cleanup(dev);
184 return ret;
185 }
186 }
187
188 dev_priv->cpp = init->cpp;
189 dev_priv->back_offset = init->back_offset;
190 dev_priv->front_offset = init->front_offset;
191 dev_priv->current_page = 0;
192 if (master_priv->sarea_priv)
193 master_priv->sarea_priv->pf_current_page = 0;
194
195 /* Allow hardware batchbuffers unless told otherwise.
196 */
197 dev_priv->allow_batchbuffer = 1;
198
199 return 0;
200 }
201
202 static int i915_dma_resume(struct drm_device * dev)
203 {
204 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
205 struct intel_ring_buffer *ring = LP_RING(dev_priv);
206
207 DRM_DEBUG_DRIVER("%s\n", __func__);
208
209 if (ring->map.handle == NULL) {
210 DRM_ERROR("can not ioremap virtual address for"
211 " ring buffer\n");
212 return -ENOMEM;
213 }
214
215 /* Program Hardware Status Page */
216 if (!ring->status_page.page_addr) {
217 DRM_ERROR("Can not find hardware status page\n");
218 return -EINVAL;
219 }
220 DRM_DEBUG_DRIVER("hw status page @ %p\n",
221 ring->status_page.page_addr);
222 if (ring->status_page.gfx_addr != 0)
223 intel_ring_setup_status_page(ring);
224 else
225 i915_write_hws_pga(dev);
226
227 DRM_DEBUG_DRIVER("Enabled hardware status page\n");
228
229 return 0;
230 }
231
232 static int i915_dma_init(struct drm_device *dev, void *data,
233 struct drm_file *file_priv)
234 {
235 drm_i915_init_t *init = data;
236 int retcode = 0;
237
238 switch (init->func) {
239 case I915_INIT_DMA:
240 retcode = i915_initialize(dev, init);
241 break;
242 case I915_CLEANUP_DMA:
243 retcode = i915_dma_cleanup(dev);
244 break;
245 case I915_RESUME_DMA:
246 retcode = i915_dma_resume(dev);
247 break;
248 default:
249 retcode = -EINVAL;
250 break;
251 }
252
253 return retcode;
254 }
255
256 /* Implement basically the same security restrictions as hardware does
257 * for MI_BATCH_NON_SECURE. These can be made stricter at any time.
258 *
259 * Most of the calculations below involve calculating the size of a
260 * particular instruction. It's important to get the size right as
261 * that tells us where the next instruction to check is. Any illegal
262 * instruction detected will be given a size of zero, which is a
263 * signal to abort the rest of the buffer.
264 */
265 static int validate_cmd(int cmd)
266 {
267 switch (((cmd >> 29) & 0x7)) {
268 case 0x0:
269 switch ((cmd >> 23) & 0x3f) {
270 case 0x0:
271 return 1; /* MI_NOOP */
272 case 0x4:
273 return 1; /* MI_FLUSH */
274 default:
275 return 0; /* disallow everything else */
276 }
277 break;
278 case 0x1:
279 return 0; /* reserved */
280 case 0x2:
281 return (cmd & 0xff) + 2; /* 2d commands */
282 case 0x3:
283 if (((cmd >> 24) & 0x1f) <= 0x18)
284 return 1;
285
286 switch ((cmd >> 24) & 0x1f) {
287 case 0x1c:
288 return 1;
289 case 0x1d:
290 switch ((cmd >> 16) & 0xff) {
291 case 0x3:
292 return (cmd & 0x1f) + 2;
293 case 0x4:
294 return (cmd & 0xf) + 2;
295 default:
296 return (cmd & 0xffff) + 2;
297 }
298 case 0x1e:
299 if (cmd & (1 << 23))
300 return (cmd & 0xffff) + 1;
301 else
302 return 1;
303 case 0x1f:
304 if ((cmd & (1 << 23)) == 0) /* inline vertices */
305 return (cmd & 0x1ffff) + 2;
306 else if (cmd & (1 << 17)) /* indirect random */
307 if ((cmd & 0xffff) == 0)
308 return 0; /* unknown length, too hard */
309 else
310 return (((cmd & 0xffff) + 1) / 2) + 1;
311 else
312 return 2; /* indirect sequential */
313 default:
314 return 0;
315 }
316 default:
317 return 0;
318 }
319
320 return 0;
321 }
322
323 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
324 {
325 drm_i915_private_t *dev_priv = dev->dev_private;
326 int i, ret;
327
328 if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)
329 return -EINVAL;
330
331 for (i = 0; i < dwords;) {
332 int sz = validate_cmd(buffer[i]);
333 if (sz == 0 || i + sz > dwords)
334 return -EINVAL;
335 i += sz;
336 }
337
338 ret = BEGIN_LP_RING((dwords+1)&~1);
339 if (ret)
340 return ret;
341
342 for (i = 0; i < dwords; i++)
343 OUT_RING(buffer[i]);
344 if (dwords & 1)
345 OUT_RING(0);
346
347 ADVANCE_LP_RING();
348
349 return 0;
350 }
351
352 int
353 i915_emit_box(struct drm_device *dev,
354 struct drm_clip_rect *box,
355 int DR1, int DR4)
356 {
357 struct drm_i915_private *dev_priv = dev->dev_private;
358 int ret;
359
360 if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
361 box->y2 <= 0 || box->x2 <= 0) {
362 DRM_ERROR("Bad box %d,%d..%d,%d\n",
363 box->x1, box->y1, box->x2, box->y2);
364 return -EINVAL;
365 }
366
367 if (INTEL_INFO(dev)->gen >= 4) {
368 ret = BEGIN_LP_RING(4);
369 if (ret)
370 return ret;
371
372 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
373 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
374 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
375 OUT_RING(DR4);
376 } else {
377 ret = BEGIN_LP_RING(6);
378 if (ret)
379 return ret;
380
381 OUT_RING(GFX_OP_DRAWRECT_INFO);
382 OUT_RING(DR1);
383 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
384 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
385 OUT_RING(DR4);
386 OUT_RING(0);
387 }
388 ADVANCE_LP_RING();
389
390 return 0;
391 }
392
393 /* XXX: Emitting the counter should really be moved to part of the IRQ
394 * emit. For now, do it in both places:
395 */
396
397 static void i915_emit_breadcrumb(struct drm_device *dev)
398 {
399 drm_i915_private_t *dev_priv = dev->dev_private;
400 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
401
402 dev_priv->counter++;
403 if (dev_priv->counter > 0x7FFFFFFFUL)
404 dev_priv->counter = 0;
405 if (master_priv->sarea_priv)
406 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
407
408 if (BEGIN_LP_RING(4) == 0) {
409 OUT_RING(MI_STORE_DWORD_INDEX);
410 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
411 OUT_RING(dev_priv->counter);
412 OUT_RING(0);
413 ADVANCE_LP_RING();
414 }
415 }
416
417 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
418 drm_i915_cmdbuffer_t *cmd,
419 struct drm_clip_rect *cliprects,
420 void *cmdbuf)
421 {
422 int nbox = cmd->num_cliprects;
423 int i = 0, count, ret;
424
425 if (cmd->sz & 0x3) {
426 DRM_ERROR("alignment");
427 return -EINVAL;
428 }
429
430 i915_kernel_lost_context(dev);
431
432 count = nbox ? nbox : 1;
433
434 for (i = 0; i < count; i++) {
435 if (i < nbox) {
436 ret = i915_emit_box(dev, &cliprects[i],
437 cmd->DR1, cmd->DR4);
438 if (ret)
439 return ret;
440 }
441
442 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
443 if (ret)
444 return ret;
445 }
446
447 i915_emit_breadcrumb(dev);
448 return 0;
449 }
450
451 static int i915_dispatch_batchbuffer(struct drm_device * dev,
452 drm_i915_batchbuffer_t * batch,
453 struct drm_clip_rect *cliprects)
454 {
455 struct drm_i915_private *dev_priv = dev->dev_private;
456 int nbox = batch->num_cliprects;
457 int i, count, ret;
458
459 if ((batch->start | batch->used) & 0x7) {
460 DRM_ERROR("alignment");
461 return -EINVAL;
462 }
463
464 i915_kernel_lost_context(dev);
465
466 count = nbox ? nbox : 1;
467 for (i = 0; i < count; i++) {
468 if (i < nbox) {
469 ret = i915_emit_box(dev, &cliprects[i],
470 batch->DR1, batch->DR4);
471 if (ret)
472 return ret;
473 }
474
475 if (!IS_I830(dev) && !IS_845G(dev)) {
476 ret = BEGIN_LP_RING(2);
477 if (ret)
478 return ret;
479
480 if (INTEL_INFO(dev)->gen >= 4) {
481 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
482 OUT_RING(batch->start);
483 } else {
484 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
485 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
486 }
487 } else {
488 ret = BEGIN_LP_RING(4);
489 if (ret)
490 return ret;
491
492 OUT_RING(MI_BATCH_BUFFER);
493 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
494 OUT_RING(batch->start + batch->used - 4);
495 OUT_RING(0);
496 }
497 ADVANCE_LP_RING();
498 }
499
500
501 if (IS_G4X(dev) || IS_GEN5(dev)) {
502 if (BEGIN_LP_RING(2) == 0) {
503 OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
504 OUT_RING(MI_NOOP);
505 ADVANCE_LP_RING();
506 }
507 }
508
509 i915_emit_breadcrumb(dev);
510 return 0;
511 }
512
513 static int i915_dispatch_flip(struct drm_device * dev)
514 {
515 drm_i915_private_t *dev_priv = dev->dev_private;
516 struct drm_i915_master_private *master_priv =
517 dev->primary->master->driver_priv;
518 int ret;
519
520 if (!master_priv->sarea_priv)
521 return -EINVAL;
522
523 DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
524 __func__,
525 dev_priv->current_page,
526 master_priv->sarea_priv->pf_current_page);
527
528 i915_kernel_lost_context(dev);
529
530 ret = BEGIN_LP_RING(10);
531 if (ret)
532 return ret;
533
534 OUT_RING(MI_FLUSH | MI_READ_FLUSH);
535 OUT_RING(0);
536
537 OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
538 OUT_RING(0);
539 if (dev_priv->current_page == 0) {
540 OUT_RING(dev_priv->back_offset);
541 dev_priv->current_page = 1;
542 } else {
543 OUT_RING(dev_priv->front_offset);
544 dev_priv->current_page = 0;
545 }
546 OUT_RING(0);
547
548 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
549 OUT_RING(0);
550
551 ADVANCE_LP_RING();
552
553 master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
554
555 if (BEGIN_LP_RING(4) == 0) {
556 OUT_RING(MI_STORE_DWORD_INDEX);
557 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
558 OUT_RING(dev_priv->counter);
559 OUT_RING(0);
560 ADVANCE_LP_RING();
561 }
562
563 master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
564 return 0;
565 }
566
567 static int i915_quiescent(struct drm_device *dev)
568 {
569 struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
570
571 i915_kernel_lost_context(dev);
572 return intel_wait_ring_idle(ring);
573 }
574
575 static int i915_flush_ioctl(struct drm_device *dev, void *data,
576 struct drm_file *file_priv)
577 {
578 int ret;
579
580 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
581
582 mutex_lock(&dev->struct_mutex);
583 ret = i915_quiescent(dev);
584 mutex_unlock(&dev->struct_mutex);
585
586 return ret;
587 }
588
589 static int i915_batchbuffer(struct drm_device *dev, void *data,
590 struct drm_file *file_priv)
591 {
592 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
593 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
594 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
595 master_priv->sarea_priv;
596 drm_i915_batchbuffer_t *batch = data;
597 int ret;
598 struct drm_clip_rect *cliprects = NULL;
599
600 if (!dev_priv->allow_batchbuffer) {
601 DRM_ERROR("Batchbuffer ioctl disabled\n");
602 return -EINVAL;
603 }
604
605 DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
606 batch->start, batch->used, batch->num_cliprects);
607
608 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
609
610 if (batch->num_cliprects < 0)
611 return -EINVAL;
612
613 if (batch->num_cliprects) {
614 cliprects = kcalloc(batch->num_cliprects,
615 sizeof(struct drm_clip_rect),
616 GFP_KERNEL);
617 if (cliprects == NULL)
618 return -ENOMEM;
619
620 ret = copy_from_user(cliprects, batch->cliprects,
621 batch->num_cliprects *
622 sizeof(struct drm_clip_rect));
623 if (ret != 0) {
624 ret = -EFAULT;
625 goto fail_free;
626 }
627 }
628
629 mutex_lock(&dev->struct_mutex);
630 ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
631 mutex_unlock(&dev->struct_mutex);
632
633 if (sarea_priv)
634 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
635
636 fail_free:
637 kfree(cliprects);
638
639 return ret;
640 }
641
642 static int i915_cmdbuffer(struct drm_device *dev, void *data,
643 struct drm_file *file_priv)
644 {
645 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
646 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
647 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
648 master_priv->sarea_priv;
649 drm_i915_cmdbuffer_t *cmdbuf = data;
650 struct drm_clip_rect *cliprects = NULL;
651 void *batch_data;
652 int ret;
653
654 DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
655 cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
656
657 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
658
659 if (cmdbuf->num_cliprects < 0)
660 return -EINVAL;
661
662 batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
663 if (batch_data == NULL)
664 return -ENOMEM;
665
666 ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
667 if (ret != 0) {
668 ret = -EFAULT;
669 goto fail_batch_free;
670 }
671
672 if (cmdbuf->num_cliprects) {
673 cliprects = kcalloc(cmdbuf->num_cliprects,
674 sizeof(struct drm_clip_rect), GFP_KERNEL);
675 if (cliprects == NULL) {
676 ret = -ENOMEM;
677 goto fail_batch_free;
678 }
679
680 ret = copy_from_user(cliprects, cmdbuf->cliprects,
681 cmdbuf->num_cliprects *
682 sizeof(struct drm_clip_rect));
683 if (ret != 0) {
684 ret = -EFAULT;
685 goto fail_clip_free;
686 }
687 }
688
689 mutex_lock(&dev->struct_mutex);
690 ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
691 mutex_unlock(&dev->struct_mutex);
692 if (ret) {
693 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
694 goto fail_clip_free;
695 }
696
697 if (sarea_priv)
698 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
699
700 fail_clip_free:
701 kfree(cliprects);
702 fail_batch_free:
703 kfree(batch_data);
704
705 return ret;
706 }
707
708 static int i915_flip_bufs(struct drm_device *dev, void *data,
709 struct drm_file *file_priv)
710 {
711 int ret;
712
713 DRM_DEBUG_DRIVER("%s\n", __func__);
714
715 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
716
717 mutex_lock(&dev->struct_mutex);
718 ret = i915_dispatch_flip(dev);
719 mutex_unlock(&dev->struct_mutex);
720
721 return ret;
722 }
723
724 static int i915_getparam(struct drm_device *dev, void *data,
725 struct drm_file *file_priv)
726 {
727 drm_i915_private_t *dev_priv = dev->dev_private;
728 drm_i915_getparam_t *param = data;
729 int value;
730
731 if (!dev_priv) {
732 DRM_ERROR("called with no initialization\n");
733 return -EINVAL;
734 }
735
736 switch (param->param) {
737 case I915_PARAM_IRQ_ACTIVE:
738 value = dev->pdev->irq ? 1 : 0;
739 break;
740 case I915_PARAM_ALLOW_BATCHBUFFER:
741 value = dev_priv->allow_batchbuffer ? 1 : 0;
742 break;
743 case I915_PARAM_LAST_DISPATCH:
744 value = READ_BREADCRUMB(dev_priv);
745 break;
746 case I915_PARAM_CHIPSET_ID:
747 value = dev->pci_device;
748 break;
749 case I915_PARAM_HAS_GEM:
750 value = dev_priv->has_gem;
751 break;
752 case I915_PARAM_NUM_FENCES_AVAIL:
753 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
754 break;
755 case I915_PARAM_HAS_OVERLAY:
756 value = dev_priv->overlay ? 1 : 0;
757 break;
758 case I915_PARAM_HAS_PAGEFLIPPING:
759 value = 1;
760 break;
761 case I915_PARAM_HAS_EXECBUF2:
762 /* depends on GEM */
763 value = dev_priv->has_gem;
764 break;
765 case I915_PARAM_HAS_BSD:
766 value = HAS_BSD(dev);
767 break;
768 case I915_PARAM_HAS_BLT:
769 value = HAS_BLT(dev);
770 break;
771 case I915_PARAM_HAS_RELAXED_FENCING:
772 value = 1;
773 break;
774 case I915_PARAM_HAS_COHERENT_RINGS:
775 value = 1;
776 break;
777 case I915_PARAM_HAS_EXEC_CONSTANTS:
778 value = INTEL_INFO(dev)->gen >= 4;
779 break;
780 case I915_PARAM_HAS_RELAXED_DELTA:
781 value = 1;
782 break;
783 default:
784 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
785 param->param);
786 return -EINVAL;
787 }
788
789 if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
790 DRM_ERROR("DRM_COPY_TO_USER failed\n");
791 return -EFAULT;
792 }
793
794 return 0;
795 }
796
797 static int i915_setparam(struct drm_device *dev, void *data,
798 struct drm_file *file_priv)
799 {
800 drm_i915_private_t *dev_priv = dev->dev_private;
801 drm_i915_setparam_t *param = data;
802
803 if (!dev_priv) {
804 DRM_ERROR("called with no initialization\n");
805 return -EINVAL;
806 }
807
808 switch (param->param) {
809 case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
810 break;
811 case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
812 dev_priv->tex_lru_log_granularity = param->value;
813 break;
814 case I915_SETPARAM_ALLOW_BATCHBUFFER:
815 dev_priv->allow_batchbuffer = param->value;
816 break;
817 case I915_SETPARAM_NUM_USED_FENCES:
818 if (param->value > dev_priv->num_fence_regs ||
819 param->value < 0)
820 return -EINVAL;
821 /* Userspace can use first N regs */
822 dev_priv->fence_reg_start = param->value;
823 break;
824 default:
825 DRM_DEBUG_DRIVER("unknown parameter %d\n",
826 param->param);
827 return -EINVAL;
828 }
829
830 return 0;
831 }
832
833 static int i915_set_status_page(struct drm_device *dev, void *data,
834 struct drm_file *file_priv)
835 {
836 drm_i915_private_t *dev_priv = dev->dev_private;
837 drm_i915_hws_addr_t *hws = data;
838 struct intel_ring_buffer *ring = LP_RING(dev_priv);
839
840 if (!I915_NEED_GFX_HWS(dev))
841 return -EINVAL;
842
843 if (!dev_priv) {
844 DRM_ERROR("called with no initialization\n");
845 return -EINVAL;
846 }
847
848 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
849 WARN(1, "tried to set status page when mode setting active\n");
850 return 0;
851 }
852
853 DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
854
855 ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
856
857 dev_priv->hws_map.offset = dev->agp->base + hws->addr;
858 dev_priv->hws_map.size = 4*1024;
859 dev_priv->hws_map.type = 0;
860 dev_priv->hws_map.flags = 0;
861 dev_priv->hws_map.mtrr = 0;
862
863 drm_core_ioremap_wc(&dev_priv->hws_map, dev);
864 if (dev_priv->hws_map.handle == NULL) {
865 i915_dma_cleanup(dev);
866 ring->status_page.gfx_addr = 0;
867 DRM_ERROR("can not ioremap virtual address for"
868 " G33 hw status page\n");
869 return -ENOMEM;
870 }
871 ring->status_page.page_addr =
872 (void __force __iomem *)dev_priv->hws_map.handle;
873 memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
874 I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
875
876 DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
877 ring->status_page.gfx_addr);
878 DRM_DEBUG_DRIVER("load hws at %p\n",
879 ring->status_page.page_addr);
880 return 0;
881 }
882
883 static int i915_get_bridge_dev(struct drm_device *dev)
884 {
885 struct drm_i915_private *dev_priv = dev->dev_private;
886
887 dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
888 if (!dev_priv->bridge_dev) {
889 DRM_ERROR("bridge device not found\n");
890 return -1;
891 }
892 return 0;
893 }
894
895 #define MCHBAR_I915 0x44
896 #define MCHBAR_I965 0x48
897 #define MCHBAR_SIZE (4*4096)
898
899 #define DEVEN_REG 0x54
900 #define DEVEN_MCHBAR_EN (1 << 28)
901
902 /* Allocate space for the MCH regs if needed, return nonzero on error */
903 static int
904 intel_alloc_mchbar_resource(struct drm_device *dev)
905 {
906 drm_i915_private_t *dev_priv = dev->dev_private;
907 int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
908 u32 temp_lo, temp_hi = 0;
909 u64 mchbar_addr;
910 int ret;
911
912 if (INTEL_INFO(dev)->gen >= 4)
913 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
914 pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
915 mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
916
917 /* If ACPI doesn't have it, assume we need to allocate it ourselves */
918 #ifdef CONFIG_PNP
919 if (mchbar_addr &&
920 pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
921 return 0;
922 #endif
923
924 /* Get some space for it */
925 dev_priv->mch_res.name = "i915 MCHBAR";
926 dev_priv->mch_res.flags = IORESOURCE_MEM;
927 ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
928 &dev_priv->mch_res,
929 MCHBAR_SIZE, MCHBAR_SIZE,
930 PCIBIOS_MIN_MEM,
931 0, pcibios_align_resource,
932 dev_priv->bridge_dev);
933 if (ret) {
934 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
935 dev_priv->mch_res.start = 0;
936 return ret;
937 }
938
939 if (INTEL_INFO(dev)->gen >= 4)
940 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
941 upper_32_bits(dev_priv->mch_res.start));
942
943 pci_write_config_dword(dev_priv->bridge_dev, reg,
944 lower_32_bits(dev_priv->mch_res.start));
945 return 0;
946 }
947
948 /* Setup MCHBAR if possible, return true if we should disable it again */
949 static void
950 intel_setup_mchbar(struct drm_device *dev)
951 {
952 drm_i915_private_t *dev_priv = dev->dev_private;
953 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
954 u32 temp;
955 bool enabled;
956
957 dev_priv->mchbar_need_disable = false;
958
959 if (IS_I915G(dev) || IS_I915GM(dev)) {
960 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
961 enabled = !!(temp & DEVEN_MCHBAR_EN);
962 } else {
963 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
964 enabled = temp & 1;
965 }
966
967 /* If it's already enabled, don't have to do anything */
968 if (enabled)
969 return;
970
971 if (intel_alloc_mchbar_resource(dev))
972 return;
973
974 dev_priv->mchbar_need_disable = true;
975
976 /* Space is allocated or reserved, so enable it. */
977 if (IS_I915G(dev) || IS_I915GM(dev)) {
978 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
979 temp | DEVEN_MCHBAR_EN);
980 } else {
981 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
982 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
983 }
984 }
985
986 static void
987 intel_teardown_mchbar(struct drm_device *dev)
988 {
989 drm_i915_private_t *dev_priv = dev->dev_private;
990 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
991 u32 temp;
992
993 if (dev_priv->mchbar_need_disable) {
994 if (IS_I915G(dev) || IS_I915GM(dev)) {
995 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
996 temp &= ~DEVEN_MCHBAR_EN;
997 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
998 } else {
999 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1000 temp &= ~1;
1001 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1002 }
1003 }
1004
1005 if (dev_priv->mch_res.start)
1006 release_resource(&dev_priv->mch_res);
1007 }
1008
1009 #define PTE_ADDRESS_MASK 0xfffff000
1010 #define PTE_ADDRESS_MASK_HIGH 0x000000f0 /* i915+ */
1011 #define PTE_MAPPING_TYPE_UNCACHED (0 << 1)
1012 #define PTE_MAPPING_TYPE_DCACHE (1 << 1) /* i830 only */
1013 #define PTE_MAPPING_TYPE_CACHED (3 << 1)
1014 #define PTE_MAPPING_TYPE_MASK (3 << 1)
1015 #define PTE_VALID (1 << 0)
1016
1017 /**
1018 * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1019 * a physical one
1020 * @dev: drm device
1021 * @offset: address to translate
1022 *
1023 * Some chip functions require allocations from stolen space and need the
1024 * physical address of the memory in question.
1025 */
1026 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1027 {
1028 struct drm_i915_private *dev_priv = dev->dev_private;
1029 struct pci_dev *pdev = dev_priv->bridge_dev;
1030 u32 base;
1031
1032 #if 0
1033 /* On the machines I have tested the Graphics Base of Stolen Memory
1034 * is unreliable, so compute the base by subtracting the stolen memory
1035 * from the Top of Low Usable DRAM which is where the BIOS places
1036 * the graphics stolen memory.
1037 */
1038 if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1039 /* top 32bits are reserved = 0 */
1040 pci_read_config_dword(pdev, 0xA4, &base);
1041 } else {
1042 /* XXX presume 8xx is the same as i915 */
1043 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1044 }
1045 #else
1046 if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1047 u16 val;
1048 pci_read_config_word(pdev, 0xb0, &val);
1049 base = val >> 4 << 20;
1050 } else {
1051 u8 val;
1052 pci_read_config_byte(pdev, 0x9c, &val);
1053 base = val >> 3 << 27;
1054 }
1055 base -= dev_priv->mm.gtt->stolen_size;
1056 #endif
1057
1058 return base + offset;
1059 }
1060
1061 static void i915_warn_stolen(struct drm_device *dev)
1062 {
1063 DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1064 DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1065 }
1066
1067 static void i915_setup_compression(struct drm_device *dev, int size)
1068 {
1069 struct drm_i915_private *dev_priv = dev->dev_private;
1070 struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1071 unsigned long cfb_base;
1072 unsigned long ll_base = 0;
1073
1074 /* Just in case the BIOS is doing something questionable. */
1075 intel_disable_fbc(dev);
1076
1077 compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1078 if (compressed_fb)
1079 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1080 if (!compressed_fb)
1081 goto err;
1082
1083 cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1084 if (!cfb_base)
1085 goto err_fb;
1086
1087 if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1088 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1089 4096, 4096, 0);
1090 if (compressed_llb)
1091 compressed_llb = drm_mm_get_block(compressed_llb,
1092 4096, 4096);
1093 if (!compressed_llb)
1094 goto err_fb;
1095
1096 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1097 if (!ll_base)
1098 goto err_llb;
1099 }
1100
1101 dev_priv->cfb_size = size;
1102
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 ret = drm_irq_install(dev);
1270 if (ret)
1271 goto cleanup_gem;
1272
1273 /* Always safe in the mode setting case. */
1274 /* FIXME: do pre/post-mode set stuff in core KMS code */
1275 dev->vblank_disable_allowed = 1;
1276
1277 ret = intel_fbdev_init(dev);
1278 if (ret)
1279 goto cleanup_irq;
1280
1281 drm_kms_helper_poll_init(dev);
1282
1283 /* We're off and running w/KMS */
1284 dev_priv->mm.suspended = 0;
1285
1286 return 0;
1287
1288 cleanup_irq:
1289 drm_irq_uninstall(dev);
1290 cleanup_gem:
1291 mutex_lock(&dev->struct_mutex);
1292 i915_gem_cleanup_ringbuffer(dev);
1293 mutex_unlock(&dev->struct_mutex);
1294 cleanup_vga_switcheroo:
1295 vga_switcheroo_unregister_client(dev->pdev);
1296 cleanup_vga_client:
1297 vga_client_register(dev->pdev, NULL, NULL, NULL);
1298 out:
1299 return ret;
1300 }
1301
1302 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1303 {
1304 struct drm_i915_master_private *master_priv;
1305
1306 master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1307 if (!master_priv)
1308 return -ENOMEM;
1309
1310 master->driver_priv = master_priv;
1311 return 0;
1312 }
1313
1314 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1315 {
1316 struct drm_i915_master_private *master_priv = master->driver_priv;
1317
1318 if (!master_priv)
1319 return;
1320
1321 kfree(master_priv);
1322
1323 master->driver_priv = NULL;
1324 }
1325
1326 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1327 {
1328 drm_i915_private_t *dev_priv = dev->dev_private;
1329 u32 tmp;
1330
1331 tmp = I915_READ(CLKCFG);
1332
1333 switch (tmp & CLKCFG_FSB_MASK) {
1334 case CLKCFG_FSB_533:
1335 dev_priv->fsb_freq = 533; /* 133*4 */
1336 break;
1337 case CLKCFG_FSB_800:
1338 dev_priv->fsb_freq = 800; /* 200*4 */
1339 break;
1340 case CLKCFG_FSB_667:
1341 dev_priv->fsb_freq = 667; /* 167*4 */
1342 break;
1343 case CLKCFG_FSB_400:
1344 dev_priv->fsb_freq = 400; /* 100*4 */
1345 break;
1346 }
1347
1348 switch (tmp & CLKCFG_MEM_MASK) {
1349 case CLKCFG_MEM_533:
1350 dev_priv->mem_freq = 533;
1351 break;
1352 case CLKCFG_MEM_667:
1353 dev_priv->mem_freq = 667;
1354 break;
1355 case CLKCFG_MEM_800:
1356 dev_priv->mem_freq = 800;
1357 break;
1358 }
1359
1360 /* detect pineview DDR3 setting */
1361 tmp = I915_READ(CSHRDDR3CTL);
1362 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1363 }
1364
1365 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1366 {
1367 drm_i915_private_t *dev_priv = dev->dev_private;
1368 u16 ddrpll, csipll;
1369
1370 ddrpll = I915_READ16(DDRMPLL1);
1371 csipll = I915_READ16(CSIPLL0);
1372
1373 switch (ddrpll & 0xff) {
1374 case 0xc:
1375 dev_priv->mem_freq = 800;
1376 break;
1377 case 0x10:
1378 dev_priv->mem_freq = 1066;
1379 break;
1380 case 0x14:
1381 dev_priv->mem_freq = 1333;
1382 break;
1383 case 0x18:
1384 dev_priv->mem_freq = 1600;
1385 break;
1386 default:
1387 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1388 ddrpll & 0xff);
1389 dev_priv->mem_freq = 0;
1390 break;
1391 }
1392
1393 dev_priv->r_t = dev_priv->mem_freq;
1394
1395 switch (csipll & 0x3ff) {
1396 case 0x00c:
1397 dev_priv->fsb_freq = 3200;
1398 break;
1399 case 0x00e:
1400 dev_priv->fsb_freq = 3733;
1401 break;
1402 case 0x010:
1403 dev_priv->fsb_freq = 4266;
1404 break;
1405 case 0x012:
1406 dev_priv->fsb_freq = 4800;
1407 break;
1408 case 0x014:
1409 dev_priv->fsb_freq = 5333;
1410 break;
1411 case 0x016:
1412 dev_priv->fsb_freq = 5866;
1413 break;
1414 case 0x018:
1415 dev_priv->fsb_freq = 6400;
1416 break;
1417 default:
1418 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1419 csipll & 0x3ff);
1420 dev_priv->fsb_freq = 0;
1421 break;
1422 }
1423
1424 if (dev_priv->fsb_freq == 3200) {
1425 dev_priv->c_m = 0;
1426 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1427 dev_priv->c_m = 1;
1428 } else {
1429 dev_priv->c_m = 2;
1430 }
1431 }
1432
1433 static const struct cparams {
1434 u16 i;
1435 u16 t;
1436 u16 m;
1437 u16 c;
1438 } cparams[] = {
1439 { 1, 1333, 301, 28664 },
1440 { 1, 1066, 294, 24460 },
1441 { 1, 800, 294, 25192 },
1442 { 0, 1333, 276, 27605 },
1443 { 0, 1066, 276, 27605 },
1444 { 0, 800, 231, 23784 },
1445 };
1446
1447 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1448 {
1449 u64 total_count, diff, ret;
1450 u32 count1, count2, count3, m = 0, c = 0;
1451 unsigned long now = jiffies_to_msecs(jiffies), diff1;
1452 int i;
1453
1454 diff1 = now - dev_priv->last_time1;
1455
1456 /* Prevent division-by-zero if we are asking too fast.
1457 * Also, we don't get interesting results if we are polling
1458 * faster than once in 10ms, so just return the saved value
1459 * in such cases.
1460 */
1461 if (diff1 <= 10)
1462 return dev_priv->chipset_power;
1463
1464 count1 = I915_READ(DMIEC);
1465 count2 = I915_READ(DDREC);
1466 count3 = I915_READ(CSIEC);
1467
1468 total_count = count1 + count2 + count3;
1469
1470 /* FIXME: handle per-counter overflow */
1471 if (total_count < dev_priv->last_count1) {
1472 diff = ~0UL - dev_priv->last_count1;
1473 diff += total_count;
1474 } else {
1475 diff = total_count - dev_priv->last_count1;
1476 }
1477
1478 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1479 if (cparams[i].i == dev_priv->c_m &&
1480 cparams[i].t == dev_priv->r_t) {
1481 m = cparams[i].m;
1482 c = cparams[i].c;
1483 break;
1484 }
1485 }
1486
1487 diff = div_u64(diff, diff1);
1488 ret = ((m * diff) + c);
1489 ret = div_u64(ret, 10);
1490
1491 dev_priv->last_count1 = total_count;
1492 dev_priv->last_time1 = now;
1493
1494 dev_priv->chipset_power = ret;
1495
1496 return ret;
1497 }
1498
1499 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1500 {
1501 unsigned long m, x, b;
1502 u32 tsfs;
1503
1504 tsfs = I915_READ(TSFS);
1505
1506 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1507 x = I915_READ8(TR1);
1508
1509 b = tsfs & TSFS_INTR_MASK;
1510
1511 return ((m * x) / 127) - b;
1512 }
1513
1514 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1515 {
1516 static const struct v_table {
1517 u16 vd; /* in .1 mil */
1518 u16 vm; /* in .1 mil */
1519 } v_table[] = {
1520 { 0, 0, },
1521 { 375, 0, },
1522 { 500, 0, },
1523 { 625, 0, },
1524 { 750, 0, },
1525 { 875, 0, },
1526 { 1000, 0, },
1527 { 1125, 0, },
1528 { 4125, 3000, },
1529 { 4125, 3000, },
1530 { 4125, 3000, },
1531 { 4125, 3000, },
1532 { 4125, 3000, },
1533 { 4125, 3000, },
1534 { 4125, 3000, },
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 { 4250, 3125, },
1553 { 4375, 3250, },
1554 { 4500, 3375, },
1555 { 4625, 3500, },
1556 { 4750, 3625, },
1557 { 4875, 3750, },
1558 { 5000, 3875, },
1559 { 5125, 4000, },
1560 { 5250, 4125, },
1561 { 5375, 4250, },
1562 { 5500, 4375, },
1563 { 5625, 4500, },
1564 { 5750, 4625, },
1565 { 5875, 4750, },
1566 { 6000, 4875, },
1567 { 6125, 5000, },
1568 { 6250, 5125, },
1569 { 6375, 5250, },
1570 { 6500, 5375, },
1571 { 6625, 5500, },
1572 { 6750, 5625, },
1573 { 6875, 5750, },
1574 { 7000, 5875, },
1575 { 7125, 6000, },
1576 { 7250, 6125, },
1577 { 7375, 6250, },
1578 { 7500, 6375, },
1579 { 7625, 6500, },
1580 { 7750, 6625, },
1581 { 7875, 6750, },
1582 { 8000, 6875, },
1583 { 8125, 7000, },
1584 { 8250, 7125, },
1585 { 8375, 7250, },
1586 { 8500, 7375, },
1587 { 8625, 7500, },
1588 { 8750, 7625, },
1589 { 8875, 7750, },
1590 { 9000, 7875, },
1591 { 9125, 8000, },
1592 { 9250, 8125, },
1593 { 9375, 8250, },
1594 { 9500, 8375, },
1595 { 9625, 8500, },
1596 { 9750, 8625, },
1597 { 9875, 8750, },
1598 { 10000, 8875, },
1599 { 10125, 9000, },
1600 { 10250, 9125, },
1601 { 10375, 9250, },
1602 { 10500, 9375, },
1603 { 10625, 9500, },
1604 { 10750, 9625, },
1605 { 10875, 9750, },
1606 { 11000, 9875, },
1607 { 11125, 10000, },
1608 { 11250, 10125, },
1609 { 11375, 10250, },
1610 { 11500, 10375, },
1611 { 11625, 10500, },
1612 { 11750, 10625, },
1613 { 11875, 10750, },
1614 { 12000, 10875, },
1615 { 12125, 11000, },
1616 { 12250, 11125, },
1617 { 12375, 11250, },
1618 { 12500, 11375, },
1619 { 12625, 11500, },
1620 { 12750, 11625, },
1621 { 12875, 11750, },
1622 { 13000, 11875, },
1623 { 13125, 12000, },
1624 { 13250, 12125, },
1625 { 13375, 12250, },
1626 { 13500, 12375, },
1627 { 13625, 12500, },
1628 { 13750, 12625, },
1629 { 13875, 12750, },
1630 { 14000, 12875, },
1631 { 14125, 13000, },
1632 { 14250, 13125, },
1633 { 14375, 13250, },
1634 { 14500, 13375, },
1635 { 14625, 13500, },
1636 { 14750, 13625, },
1637 { 14875, 13750, },
1638 { 15000, 13875, },
1639 { 15125, 14000, },
1640 { 15250, 14125, },
1641 { 15375, 14250, },
1642 { 15500, 14375, },
1643 { 15625, 14500, },
1644 { 15750, 14625, },
1645 { 15875, 14750, },
1646 { 16000, 14875, },
1647 { 16125, 15000, },
1648 };
1649 if (dev_priv->info->is_mobile)
1650 return v_table[pxvid].vm;
1651 else
1652 return v_table[pxvid].vd;
1653 }
1654
1655 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1656 {
1657 struct timespec now, diff1;
1658 u64 diff;
1659 unsigned long diffms;
1660 u32 count;
1661
1662 getrawmonotonic(&now);
1663 diff1 = timespec_sub(now, dev_priv->last_time2);
1664
1665 /* Don't divide by 0 */
1666 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1667 if (!diffms)
1668 return;
1669
1670 count = I915_READ(GFXEC);
1671
1672 if (count < dev_priv->last_count2) {
1673 diff = ~0UL - dev_priv->last_count2;
1674 diff += count;
1675 } else {
1676 diff = count - dev_priv->last_count2;
1677 }
1678
1679 dev_priv->last_count2 = count;
1680 dev_priv->last_time2 = now;
1681
1682 /* More magic constants... */
1683 diff = diff * 1181;
1684 diff = div_u64(diff, diffms * 10);
1685 dev_priv->gfx_power = diff;
1686 }
1687
1688 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1689 {
1690 unsigned long t, corr, state1, corr2, state2;
1691 u32 pxvid, ext_v;
1692
1693 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1694 pxvid = (pxvid >> 24) & 0x7f;
1695 ext_v = pvid_to_extvid(dev_priv, pxvid);
1696
1697 state1 = ext_v;
1698
1699 t = i915_mch_val(dev_priv);
1700
1701 /* Revel in the empirically derived constants */
1702
1703 /* Correction factor in 1/100000 units */
1704 if (t > 80)
1705 corr = ((t * 2349) + 135940);
1706 else if (t >= 50)
1707 corr = ((t * 964) + 29317);
1708 else /* < 50 */
1709 corr = ((t * 301) + 1004);
1710
1711 corr = corr * ((150142 * state1) / 10000 - 78642);
1712 corr /= 100000;
1713 corr2 = (corr * dev_priv->corr);
1714
1715 state2 = (corr2 * state1) / 10000;
1716 state2 /= 100; /* convert to mW */
1717
1718 i915_update_gfx_val(dev_priv);
1719
1720 return dev_priv->gfx_power + state2;
1721 }
1722
1723 /* Global for IPS driver to get at the current i915 device */
1724 static struct drm_i915_private *i915_mch_dev;
1725 /*
1726 * Lock protecting IPS related data structures
1727 * - i915_mch_dev
1728 * - dev_priv->max_delay
1729 * - dev_priv->min_delay
1730 * - dev_priv->fmax
1731 * - dev_priv->gpu_busy
1732 */
1733 static DEFINE_SPINLOCK(mchdev_lock);
1734
1735 /**
1736 * i915_read_mch_val - return value for IPS use
1737 *
1738 * Calculate and return a value for the IPS driver to use when deciding whether
1739 * we have thermal and power headroom to increase CPU or GPU power budget.
1740 */
1741 unsigned long i915_read_mch_val(void)
1742 {
1743 struct drm_i915_private *dev_priv;
1744 unsigned long chipset_val, graphics_val, ret = 0;
1745
1746 spin_lock(&mchdev_lock);
1747 if (!i915_mch_dev)
1748 goto out_unlock;
1749 dev_priv = i915_mch_dev;
1750
1751 chipset_val = i915_chipset_val(dev_priv);
1752 graphics_val = i915_gfx_val(dev_priv);
1753
1754 ret = chipset_val + graphics_val;
1755
1756 out_unlock:
1757 spin_unlock(&mchdev_lock);
1758
1759 return ret;
1760 }
1761 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1762
1763 /**
1764 * i915_gpu_raise - raise GPU frequency limit
1765 *
1766 * Raise the limit; IPS indicates we have thermal headroom.
1767 */
1768 bool i915_gpu_raise(void)
1769 {
1770 struct drm_i915_private *dev_priv;
1771 bool ret = true;
1772
1773 spin_lock(&mchdev_lock);
1774 if (!i915_mch_dev) {
1775 ret = false;
1776 goto out_unlock;
1777 }
1778 dev_priv = i915_mch_dev;
1779
1780 if (dev_priv->max_delay > dev_priv->fmax)
1781 dev_priv->max_delay--;
1782
1783 out_unlock:
1784 spin_unlock(&mchdev_lock);
1785
1786 return ret;
1787 }
1788 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1789
1790 /**
1791 * i915_gpu_lower - lower GPU frequency limit
1792 *
1793 * IPS indicates we're close to a thermal limit, so throttle back the GPU
1794 * frequency maximum.
1795 */
1796 bool i915_gpu_lower(void)
1797 {
1798 struct drm_i915_private *dev_priv;
1799 bool ret = true;
1800
1801 spin_lock(&mchdev_lock);
1802 if (!i915_mch_dev) {
1803 ret = false;
1804 goto out_unlock;
1805 }
1806 dev_priv = i915_mch_dev;
1807
1808 if (dev_priv->max_delay < dev_priv->min_delay)
1809 dev_priv->max_delay++;
1810
1811 out_unlock:
1812 spin_unlock(&mchdev_lock);
1813
1814 return ret;
1815 }
1816 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1817
1818 /**
1819 * i915_gpu_busy - indicate GPU business to IPS
1820 *
1821 * Tell the IPS driver whether or not the GPU is busy.
1822 */
1823 bool i915_gpu_busy(void)
1824 {
1825 struct drm_i915_private *dev_priv;
1826 bool ret = false;
1827
1828 spin_lock(&mchdev_lock);
1829 if (!i915_mch_dev)
1830 goto out_unlock;
1831 dev_priv = i915_mch_dev;
1832
1833 ret = dev_priv->busy;
1834
1835 out_unlock:
1836 spin_unlock(&mchdev_lock);
1837
1838 return ret;
1839 }
1840 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1841
1842 /**
1843 * i915_gpu_turbo_disable - disable graphics turbo
1844 *
1845 * Disable graphics turbo by resetting the max frequency and setting the
1846 * current frequency to the default.
1847 */
1848 bool i915_gpu_turbo_disable(void)
1849 {
1850 struct drm_i915_private *dev_priv;
1851 bool ret = true;
1852
1853 spin_lock(&mchdev_lock);
1854 if (!i915_mch_dev) {
1855 ret = false;
1856 goto out_unlock;
1857 }
1858 dev_priv = i915_mch_dev;
1859
1860 dev_priv->max_delay = dev_priv->fstart;
1861
1862 if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1863 ret = false;
1864
1865 out_unlock:
1866 spin_unlock(&mchdev_lock);
1867
1868 return ret;
1869 }
1870 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1871
1872 /**
1873 * Tells the intel_ips driver that the i915 driver is now loaded, if
1874 * IPS got loaded first.
1875 *
1876 * This awkward dance is so that neither module has to depend on the
1877 * other in order for IPS to do the appropriate communication of
1878 * GPU turbo limits to i915.
1879 */
1880 static void
1881 ips_ping_for_i915_load(void)
1882 {
1883 void (*link)(void);
1884
1885 link = symbol_get(ips_link_to_i915_driver);
1886 if (link) {
1887 link();
1888 symbol_put(ips_link_to_i915_driver);
1889 }
1890 }
1891
1892 /**
1893 * i915_driver_load - setup chip and create an initial config
1894 * @dev: DRM device
1895 * @flags: startup flags
1896 *
1897 * The driver load routine has to do several things:
1898 * - drive output discovery via intel_modeset_init()
1899 * - initialize the memory manager
1900 * - allocate initial config memory
1901 * - setup the DRM framebuffer with the allocated memory
1902 */
1903 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1904 {
1905 struct drm_i915_private *dev_priv;
1906 int ret = 0, mmio_bar;
1907 uint32_t agp_size;
1908
1909 /* i915 has 4 more counters */
1910 dev->counters += 4;
1911 dev->types[6] = _DRM_STAT_IRQ;
1912 dev->types[7] = _DRM_STAT_PRIMARY;
1913 dev->types[8] = _DRM_STAT_SECONDARY;
1914 dev->types[9] = _DRM_STAT_DMA;
1915
1916 dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1917 if (dev_priv == NULL)
1918 return -ENOMEM;
1919
1920 dev->dev_private = (void *)dev_priv;
1921 dev_priv->dev = dev;
1922 dev_priv->info = (struct intel_device_info *) flags;
1923
1924 if (i915_get_bridge_dev(dev)) {
1925 ret = -EIO;
1926 goto free_priv;
1927 }
1928
1929 /* overlay on gen2 is broken and can't address above 1G */
1930 if (IS_GEN2(dev))
1931 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1932
1933 /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1934 * using 32bit addressing, overwriting memory if HWS is located
1935 * above 4GB.
1936 *
1937 * The documentation also mentions an issue with undefined
1938 * behaviour if any general state is accessed within a page above 4GB,
1939 * which also needs to be handled carefully.
1940 */
1941 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1942 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
1943
1944 mmio_bar = IS_GEN2(dev) ? 1 : 0;
1945 dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1946 if (!dev_priv->regs) {
1947 DRM_ERROR("failed to map registers\n");
1948 ret = -EIO;
1949 goto put_bridge;
1950 }
1951
1952 dev_priv->mm.gtt = intel_gtt_get();
1953 if (!dev_priv->mm.gtt) {
1954 DRM_ERROR("Failed to initialize GTT\n");
1955 ret = -ENODEV;
1956 goto out_rmmap;
1957 }
1958
1959 agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1960
1961 dev_priv->mm.gtt_mapping =
1962 io_mapping_create_wc(dev->agp->base, agp_size);
1963 if (dev_priv->mm.gtt_mapping == NULL) {
1964 ret = -EIO;
1965 goto out_rmmap;
1966 }
1967
1968 /* Set up a WC MTRR for non-PAT systems. This is more common than
1969 * one would think, because the kernel disables PAT on first
1970 * generation Core chips because WC PAT gets overridden by a UC
1971 * MTRR if present. Even if a UC MTRR isn't present.
1972 */
1973 dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1974 agp_size,
1975 MTRR_TYPE_WRCOMB, 1);
1976 if (dev_priv->mm.gtt_mtrr < 0) {
1977 DRM_INFO("MTRR allocation failed. Graphics "
1978 "performance may suffer.\n");
1979 }
1980
1981 /* The i915 workqueue is primarily used for batched retirement of
1982 * requests (and thus managing bo) once the task has been completed
1983 * by the GPU. i915_gem_retire_requests() is called directly when we
1984 * need high-priority retirement, such as waiting for an explicit
1985 * bo.
1986 *
1987 * It is also used for periodic low-priority events, such as
1988 * idle-timers and recording error state.
1989 *
1990 * All tasks on the workqueue are expected to acquire the dev mutex
1991 * so there is no point in running more than one instance of the
1992 * workqueue at any time: max_active = 1 and NON_REENTRANT.
1993 */
1994 dev_priv->wq = alloc_workqueue("i915",
1995 WQ_UNBOUND | WQ_NON_REENTRANT,
1996 1);
1997 if (dev_priv->wq == NULL) {
1998 DRM_ERROR("Failed to create our workqueue.\n");
1999 ret = -ENOMEM;
2000 goto out_mtrrfree;
2001 }
2002
2003 /* enable GEM by default */
2004 dev_priv->has_gem = 1;
2005
2006 intel_irq_init(dev);
2007
2008 /* Try to make sure MCHBAR is enabled before poking at it */
2009 intel_setup_mchbar(dev);
2010 intel_setup_gmbus(dev);
2011 intel_opregion_setup(dev);
2012
2013 /* Make sure the bios did its job and set up vital registers */
2014 intel_setup_bios(dev);
2015
2016 i915_gem_load(dev);
2017
2018 /* Init HWS */
2019 if (!I915_NEED_GFX_HWS(dev)) {
2020 ret = i915_init_phys_hws(dev);
2021 if (ret)
2022 goto out_gem_unload;
2023 }
2024
2025 if (IS_PINEVIEW(dev))
2026 i915_pineview_get_mem_freq(dev);
2027 else if (IS_GEN5(dev))
2028 i915_ironlake_get_mem_freq(dev);
2029
2030 /* On the 945G/GM, the chipset reports the MSI capability on the
2031 * integrated graphics even though the support isn't actually there
2032 * according to the published specs. It doesn't appear to function
2033 * correctly in testing on 945G.
2034 * This may be a side effect of MSI having been made available for PEG
2035 * and the registers being closely associated.
2036 *
2037 * According to chipset errata, on the 965GM, MSI interrupts may
2038 * be lost or delayed, but we use them anyways to avoid
2039 * stuck interrupts on some machines.
2040 */
2041 if (!IS_I945G(dev) && !IS_I945GM(dev))
2042 pci_enable_msi(dev->pdev);
2043
2044 spin_lock_init(&dev_priv->irq_lock);
2045 spin_lock_init(&dev_priv->error_lock);
2046 spin_lock_init(&dev_priv->rps_lock);
2047
2048 if (IS_MOBILE(dev) || !IS_GEN2(dev))
2049 dev_priv->num_pipe = 2;
2050 else
2051 dev_priv->num_pipe = 1;
2052
2053 ret = drm_vblank_init(dev, dev_priv->num_pipe);
2054 if (ret)
2055 goto out_gem_unload;
2056
2057 /* Start out suspended */
2058 dev_priv->mm.suspended = 1;
2059
2060 intel_detect_pch(dev);
2061
2062 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2063 ret = i915_load_modeset_init(dev);
2064 if (ret < 0) {
2065 DRM_ERROR("failed to init modeset\n");
2066 goto out_gem_unload;
2067 }
2068 }
2069
2070 /* Must be done after probing outputs */
2071 intel_opregion_init(dev);
2072 acpi_video_register();
2073
2074 setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2075 (unsigned long) dev);
2076
2077 spin_lock(&mchdev_lock);
2078 i915_mch_dev = dev_priv;
2079 dev_priv->mchdev_lock = &mchdev_lock;
2080 spin_unlock(&mchdev_lock);
2081
2082 ips_ping_for_i915_load();
2083
2084 return 0;
2085
2086 out_gem_unload:
2087 if (dev_priv->mm.inactive_shrinker.shrink)
2088 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2089
2090 if (dev->pdev->msi_enabled)
2091 pci_disable_msi(dev->pdev);
2092
2093 intel_teardown_gmbus(dev);
2094 intel_teardown_mchbar(dev);
2095 destroy_workqueue(dev_priv->wq);
2096 out_mtrrfree:
2097 if (dev_priv->mm.gtt_mtrr >= 0) {
2098 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2099 dev->agp->agp_info.aper_size * 1024 * 1024);
2100 dev_priv->mm.gtt_mtrr = -1;
2101 }
2102 io_mapping_free(dev_priv->mm.gtt_mapping);
2103 out_rmmap:
2104 pci_iounmap(dev->pdev, dev_priv->regs);
2105 put_bridge:
2106 pci_dev_put(dev_priv->bridge_dev);
2107 free_priv:
2108 kfree(dev_priv);
2109 return ret;
2110 }
2111
2112 int i915_driver_unload(struct drm_device *dev)
2113 {
2114 struct drm_i915_private *dev_priv = dev->dev_private;
2115 int ret;
2116
2117 spin_lock(&mchdev_lock);
2118 i915_mch_dev = NULL;
2119 spin_unlock(&mchdev_lock);
2120
2121 if (dev_priv->mm.inactive_shrinker.shrink)
2122 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2123
2124 mutex_lock(&dev->struct_mutex);
2125 ret = i915_gpu_idle(dev);
2126 if (ret)
2127 DRM_ERROR("failed to idle hardware: %d\n", ret);
2128 mutex_unlock(&dev->struct_mutex);
2129
2130 /* Cancel the retire work handler, which should be idle now. */
2131 cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2132
2133 io_mapping_free(dev_priv->mm.gtt_mapping);
2134 if (dev_priv->mm.gtt_mtrr >= 0) {
2135 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2136 dev->agp->agp_info.aper_size * 1024 * 1024);
2137 dev_priv->mm.gtt_mtrr = -1;
2138 }
2139
2140 acpi_video_unregister();
2141
2142 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2143 intel_fbdev_fini(dev);
2144 intel_modeset_cleanup(dev);
2145
2146 /*
2147 * free the memory space allocated for the child device
2148 * config parsed from VBT
2149 */
2150 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2151 kfree(dev_priv->child_dev);
2152 dev_priv->child_dev = NULL;
2153 dev_priv->child_dev_num = 0;
2154 }
2155
2156 vga_switcheroo_unregister_client(dev->pdev);
2157 vga_client_register(dev->pdev, NULL, NULL, NULL);
2158 }
2159
2160 /* Free error state after interrupts are fully disabled. */
2161 del_timer_sync(&dev_priv->hangcheck_timer);
2162 cancel_work_sync(&dev_priv->error_work);
2163 i915_destroy_error_state(dev);
2164
2165 if (dev->pdev->msi_enabled)
2166 pci_disable_msi(dev->pdev);
2167
2168 intel_opregion_fini(dev);
2169
2170 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2171 /* Flush any outstanding unpin_work. */
2172 flush_workqueue(dev_priv->wq);
2173
2174 mutex_lock(&dev->struct_mutex);
2175 i915_gem_free_all_phys_object(dev);
2176 i915_gem_cleanup_ringbuffer(dev);
2177 mutex_unlock(&dev->struct_mutex);
2178 if (I915_HAS_FBC(dev) && i915_powersave)
2179 i915_cleanup_compression(dev);
2180 drm_mm_takedown(&dev_priv->mm.stolen);
2181
2182 intel_cleanup_overlay(dev);
2183
2184 if (!I915_NEED_GFX_HWS(dev))
2185 i915_free_hws(dev);
2186 }
2187
2188 if (dev_priv->regs != NULL)
2189 pci_iounmap(dev->pdev, dev_priv->regs);
2190
2191 intel_teardown_gmbus(dev);
2192 intel_teardown_mchbar(dev);
2193
2194 destroy_workqueue(dev_priv->wq);
2195
2196 pci_dev_put(dev_priv->bridge_dev);
2197 kfree(dev->dev_private);
2198
2199 return 0;
2200 }
2201
2202 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2203 {
2204 struct drm_i915_file_private *file_priv;
2205
2206 DRM_DEBUG_DRIVER("\n");
2207 file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2208 if (!file_priv)
2209 return -ENOMEM;
2210
2211 file->driver_priv = file_priv;
2212
2213 spin_lock_init(&file_priv->mm.lock);
2214 INIT_LIST_HEAD(&file_priv->mm.request_list);
2215
2216 return 0;
2217 }
2218
2219 /**
2220 * i915_driver_lastclose - clean up after all DRM clients have exited
2221 * @dev: DRM device
2222 *
2223 * Take care of cleaning up after all DRM clients have exited. In the
2224 * mode setting case, we want to restore the kernel's initial mode (just
2225 * in case the last client left us in a bad state).
2226 *
2227 * Additionally, in the non-mode setting case, we'll tear down the AGP
2228 * and DMA structures, since the kernel won't be using them, and clea
2229 * up any GEM state.
2230 */
2231 void i915_driver_lastclose(struct drm_device * dev)
2232 {
2233 drm_i915_private_t *dev_priv = dev->dev_private;
2234
2235 if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2236 intel_fb_restore_mode(dev);
2237 vga_switcheroo_process_delayed_switch();
2238 return;
2239 }
2240
2241 i915_gem_lastclose(dev);
2242
2243 if (dev_priv->agp_heap)
2244 i915_mem_takedown(&(dev_priv->agp_heap));
2245
2246 i915_dma_cleanup(dev);
2247 }
2248
2249 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2250 {
2251 drm_i915_private_t *dev_priv = dev->dev_private;
2252 i915_gem_release(dev, file_priv);
2253 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2254 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2255 }
2256
2257 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2258 {
2259 struct drm_i915_file_private *file_priv = file->driver_priv;
2260
2261 kfree(file_priv);
2262 }
2263
2264 struct drm_ioctl_desc i915_ioctls[] = {
2265 DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2266 DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2267 DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2268 DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2269 DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2270 DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2271 DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2272 DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2273 DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2274 DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2275 DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2276 DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2277 DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2278 DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2279 DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, i915_vblank_pipe_get, DRM_AUTH),
2280 DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2281 DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2282 DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2283 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2284 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2285 DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2286 DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2287 DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2288 DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2289 DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2290 DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2291 DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2292 DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2293 DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2294 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2295 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2296 DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2297 DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2298 DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2299 DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2300 DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2301 DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2302 DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2303 DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2304 DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2305 };
2306
2307 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2308
2309 /**
2310 * Determine if the device really is AGP or not.
2311 *
2312 * All Intel graphics chipsets are treated as AGP, even if they are really
2313 * PCI-e.
2314 *
2315 * \param dev The device to be tested.
2316 *
2317 * \returns
2318 * A value of 1 is always retured to indictate every i9x5 is AGP.
2319 */
2320 int i915_driver_device_is_agp(struct drm_device * dev)
2321 {
2322 return 1;
2323 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree