1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
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.
31 #include "drm_crtc_helper.h"
32 #include "drm_fb_helper.h"
33 #include "intel_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>
47 * Sets up the hardware status page for devices that need a physical address
50 static int i915_init_phys_hws(struct drm_device *dev)
52 drm_i915_private_t *dev_priv = dev->dev_private;
53 struct intel_ring_buffer *ring = LP_RING(dev_priv);
55 /* Program Hardware Status Page */
56 dev_priv->status_page_dmah =
57 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
59 if (!dev_priv->status_page_dmah) {
60 DRM_ERROR("Can not allocate hardware status page\n");
63 ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr;
64 dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
66 memset(ring->status_page.page_addr, 0, PAGE_SIZE);
68 if (INTEL_INFO(dev)->gen >= 4)
69 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
72 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
73 DRM_DEBUG_DRIVER("Enabled hardware status page\n");
78 * Frees the hardware status page, whether it's a physical address or a virtual
79 * address set up by the X Server.
81 static void i915_free_hws(struct drm_device *dev)
83 drm_i915_private_t *dev_priv = dev->dev_private;
84 struct intel_ring_buffer *ring = LP_RING(dev_priv);
86 if (dev_priv->status_page_dmah) {
87 drm_pci_free(dev, dev_priv->status_page_dmah);
88 dev_priv->status_page_dmah = NULL;
91 if (ring->status_page.gfx_addr) {
92 ring->status_page.gfx_addr = 0;
93 drm_core_ioremapfree(&dev_priv->hws_map, dev);
96 /* Need to rewrite hardware status page */
97 I915_WRITE(HWS_PGA, 0x1ffff000);
100 void i915_kernel_lost_context(struct drm_device * dev)
102 drm_i915_private_t *dev_priv = dev->dev_private;
103 struct drm_i915_master_private *master_priv;
104 struct intel_ring_buffer *ring = LP_RING(dev_priv);
107 * We should never lose context on the ring with modesetting
108 * as we don't expose it to userspace
110 if (drm_core_check_feature(dev, DRIVER_MODESET))
113 ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
114 ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
115 ring->space = ring->head - (ring->tail + 8);
117 ring->space += ring->size;
119 if (!dev->primary->master)
122 master_priv = dev->primary->master->driver_priv;
123 if (ring->head == ring->tail && master_priv->sarea_priv)
124 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
127 static int i915_dma_cleanup(struct drm_device * dev)
129 drm_i915_private_t *dev_priv = dev->dev_private;
132 /* Make sure interrupts are disabled here because the uninstall ioctl
133 * may not have been called from userspace and after dev_private
134 * is freed, it's too late.
136 if (dev->irq_enabled)
137 drm_irq_uninstall(dev);
139 mutex_lock(&dev->struct_mutex);
140 for (i = 0; i < I915_NUM_RINGS; i++)
141 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
142 mutex_unlock(&dev->struct_mutex);
144 /* Clear the HWS virtual address at teardown */
145 if (I915_NEED_GFX_HWS(dev))
151 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
153 drm_i915_private_t *dev_priv = dev->dev_private;
154 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
155 struct intel_ring_buffer *ring = LP_RING(dev_priv);
157 master_priv->sarea = drm_getsarea(dev);
158 if (master_priv->sarea) {
159 master_priv->sarea_priv = (drm_i915_sarea_t *)
160 ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
162 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
165 if (init->ring_size != 0) {
166 if (ring->obj != NULL) {
167 i915_dma_cleanup(dev);
168 DRM_ERROR("Client tried to initialize ringbuffer in "
173 ring->size = init->ring_size;
175 ring->map.offset = init->ring_start;
176 ring->map.size = init->ring_size;
181 drm_core_ioremap_wc(&ring->map, dev);
183 if (ring->map.handle == NULL) {
184 i915_dma_cleanup(dev);
185 DRM_ERROR("can not ioremap virtual address for"
191 ring->virtual_start = ring->map.handle;
193 dev_priv->cpp = init->cpp;
194 dev_priv->back_offset = init->back_offset;
195 dev_priv->front_offset = init->front_offset;
196 dev_priv->current_page = 0;
197 if (master_priv->sarea_priv)
198 master_priv->sarea_priv->pf_current_page = 0;
200 /* Allow hardware batchbuffers unless told otherwise.
202 dev_priv->allow_batchbuffer = 1;
207 static int i915_dma_resume(struct drm_device * dev)
209 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
210 struct intel_ring_buffer *ring = LP_RING(dev_priv);
212 DRM_DEBUG_DRIVER("%s\n", __func__);
214 if (ring->map.handle == NULL) {
215 DRM_ERROR("can not ioremap virtual address for"
220 /* Program Hardware Status Page */
221 if (!ring->status_page.page_addr) {
222 DRM_ERROR("Can not find hardware status page\n");
225 DRM_DEBUG_DRIVER("hw status page @ %p\n",
226 ring->status_page.page_addr);
227 if (ring->status_page.gfx_addr != 0)
228 intel_ring_setup_status_page(ring);
230 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
232 DRM_DEBUG_DRIVER("Enabled hardware status page\n");
237 static int i915_dma_init(struct drm_device *dev, void *data,
238 struct drm_file *file_priv)
240 drm_i915_init_t *init = data;
243 switch (init->func) {
245 retcode = i915_initialize(dev, init);
247 case I915_CLEANUP_DMA:
248 retcode = i915_dma_cleanup(dev);
250 case I915_RESUME_DMA:
251 retcode = i915_dma_resume(dev);
261 /* Implement basically the same security restrictions as hardware does
262 * for MI_BATCH_NON_SECURE. These can be made stricter at any time.
264 * Most of the calculations below involve calculating the size of a
265 * particular instruction. It's important to get the size right as
266 * that tells us where the next instruction to check is. Any illegal
267 * instruction detected will be given a size of zero, which is a
268 * signal to abort the rest of the buffer.
270 static int validate_cmd(int cmd)
272 switch (((cmd >> 29) & 0x7)) {
274 switch ((cmd >> 23) & 0x3f) {
276 return 1; /* MI_NOOP */
278 return 1; /* MI_FLUSH */
280 return 0; /* disallow everything else */
284 return 0; /* reserved */
286 return (cmd & 0xff) + 2; /* 2d commands */
288 if (((cmd >> 24) & 0x1f) <= 0x18)
291 switch ((cmd >> 24) & 0x1f) {
295 switch ((cmd >> 16) & 0xff) {
297 return (cmd & 0x1f) + 2;
299 return (cmd & 0xf) + 2;
301 return (cmd & 0xffff) + 2;
305 return (cmd & 0xffff) + 1;
309 if ((cmd & (1 << 23)) == 0) /* inline vertices */
310 return (cmd & 0x1ffff) + 2;
311 else if (cmd & (1 << 17)) /* indirect random */
312 if ((cmd & 0xffff) == 0)
313 return 0; /* unknown length, too hard */
315 return (((cmd & 0xffff) + 1) / 2) + 1;
317 return 2; /* indirect sequential */
328 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
330 drm_i915_private_t *dev_priv = dev->dev_private;
333 if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)
336 for (i = 0; i < dwords;) {
337 int sz = validate_cmd(buffer[i]);
338 if (sz == 0 || i + sz > dwords)
343 ret = BEGIN_LP_RING((dwords+1)&~1);
347 for (i = 0; i < dwords; i++)
358 i915_emit_box(struct drm_device *dev,
359 struct drm_clip_rect *box,
362 struct drm_i915_private *dev_priv = dev->dev_private;
365 if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
366 box->y2 <= 0 || box->x2 <= 0) {
367 DRM_ERROR("Bad box %d,%d..%d,%d\n",
368 box->x1, box->y1, box->x2, box->y2);
372 if (INTEL_INFO(dev)->gen >= 4) {
373 ret = BEGIN_LP_RING(4);
377 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
378 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
379 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
382 ret = BEGIN_LP_RING(6);
386 OUT_RING(GFX_OP_DRAWRECT_INFO);
388 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
389 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
398 /* XXX: Emitting the counter should really be moved to part of the IRQ
399 * emit. For now, do it in both places:
402 static void i915_emit_breadcrumb(struct drm_device *dev)
404 drm_i915_private_t *dev_priv = dev->dev_private;
405 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
408 if (dev_priv->counter > 0x7FFFFFFFUL)
409 dev_priv->counter = 0;
410 if (master_priv->sarea_priv)
411 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
413 if (BEGIN_LP_RING(4) == 0) {
414 OUT_RING(MI_STORE_DWORD_INDEX);
415 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
416 OUT_RING(dev_priv->counter);
422 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
423 drm_i915_cmdbuffer_t *cmd,
424 struct drm_clip_rect *cliprects,
427 int nbox = cmd->num_cliprects;
428 int i = 0, count, ret;
431 DRM_ERROR("alignment");
435 i915_kernel_lost_context(dev);
437 count = nbox ? nbox : 1;
439 for (i = 0; i < count; i++) {
441 ret = i915_emit_box(dev, &cliprects[i],
447 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
452 i915_emit_breadcrumb(dev);
456 static int i915_dispatch_batchbuffer(struct drm_device * dev,
457 drm_i915_batchbuffer_t * batch,
458 struct drm_clip_rect *cliprects)
460 struct drm_i915_private *dev_priv = dev->dev_private;
461 int nbox = batch->num_cliprects;
464 if ((batch->start | batch->used) & 0x7) {
465 DRM_ERROR("alignment");
469 i915_kernel_lost_context(dev);
471 count = nbox ? nbox : 1;
472 for (i = 0; i < count; i++) {
474 ret = i915_emit_box(dev, &cliprects[i],
475 batch->DR1, batch->DR4);
480 if (!IS_I830(dev) && !IS_845G(dev)) {
481 ret = BEGIN_LP_RING(2);
485 if (INTEL_INFO(dev)->gen >= 4) {
486 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
487 OUT_RING(batch->start);
489 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
490 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
493 ret = BEGIN_LP_RING(4);
497 OUT_RING(MI_BATCH_BUFFER);
498 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
499 OUT_RING(batch->start + batch->used - 4);
506 if (IS_G4X(dev) || IS_GEN5(dev)) {
507 if (BEGIN_LP_RING(2) == 0) {
508 OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
514 i915_emit_breadcrumb(dev);
518 static int i915_dispatch_flip(struct drm_device * dev)
520 drm_i915_private_t *dev_priv = dev->dev_private;
521 struct drm_i915_master_private *master_priv =
522 dev->primary->master->driver_priv;
525 if (!master_priv->sarea_priv)
528 DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
530 dev_priv->current_page,
531 master_priv->sarea_priv->pf_current_page);
533 i915_kernel_lost_context(dev);
535 ret = BEGIN_LP_RING(10);
539 OUT_RING(MI_FLUSH | MI_READ_FLUSH);
542 OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
544 if (dev_priv->current_page == 0) {
545 OUT_RING(dev_priv->back_offset);
546 dev_priv->current_page = 1;
548 OUT_RING(dev_priv->front_offset);
549 dev_priv->current_page = 0;
553 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
558 master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
560 if (BEGIN_LP_RING(4) == 0) {
561 OUT_RING(MI_STORE_DWORD_INDEX);
562 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
563 OUT_RING(dev_priv->counter);
568 master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
572 static int i915_quiescent(struct drm_device *dev)
574 struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
576 i915_kernel_lost_context(dev);
577 return intel_wait_ring_buffer(ring, ring->size - 8);
580 static int i915_flush_ioctl(struct drm_device *dev, void *data,
581 struct drm_file *file_priv)
585 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
587 mutex_lock(&dev->struct_mutex);
588 ret = i915_quiescent(dev);
589 mutex_unlock(&dev->struct_mutex);
594 static int i915_batchbuffer(struct drm_device *dev, void *data,
595 struct drm_file *file_priv)
597 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
598 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
599 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
600 master_priv->sarea_priv;
601 drm_i915_batchbuffer_t *batch = data;
603 struct drm_clip_rect *cliprects = NULL;
605 if (!dev_priv->allow_batchbuffer) {
606 DRM_ERROR("Batchbuffer ioctl disabled\n");
610 DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
611 batch->start, batch->used, batch->num_cliprects);
613 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
615 if (batch->num_cliprects < 0)
618 if (batch->num_cliprects) {
619 cliprects = kcalloc(batch->num_cliprects,
620 sizeof(struct drm_clip_rect),
622 if (cliprects == NULL)
625 ret = copy_from_user(cliprects, batch->cliprects,
626 batch->num_cliprects *
627 sizeof(struct drm_clip_rect));
634 mutex_lock(&dev->struct_mutex);
635 ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
636 mutex_unlock(&dev->struct_mutex);
639 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
647 static int i915_cmdbuffer(struct drm_device *dev, void *data,
648 struct drm_file *file_priv)
650 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
651 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
652 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
653 master_priv->sarea_priv;
654 drm_i915_cmdbuffer_t *cmdbuf = data;
655 struct drm_clip_rect *cliprects = NULL;
659 DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
660 cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
662 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
664 if (cmdbuf->num_cliprects < 0)
667 batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
668 if (batch_data == NULL)
671 ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
674 goto fail_batch_free;
677 if (cmdbuf->num_cliprects) {
678 cliprects = kcalloc(cmdbuf->num_cliprects,
679 sizeof(struct drm_clip_rect), GFP_KERNEL);
680 if (cliprects == NULL) {
682 goto fail_batch_free;
685 ret = copy_from_user(cliprects, cmdbuf->cliprects,
686 cmdbuf->num_cliprects *
687 sizeof(struct drm_clip_rect));
694 mutex_lock(&dev->struct_mutex);
695 ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
696 mutex_unlock(&dev->struct_mutex);
698 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
703 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
713 static int i915_flip_bufs(struct drm_device *dev, void *data,
714 struct drm_file *file_priv)
718 DRM_DEBUG_DRIVER("%s\n", __func__);
720 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
722 mutex_lock(&dev->struct_mutex);
723 ret = i915_dispatch_flip(dev);
724 mutex_unlock(&dev->struct_mutex);
729 static int i915_getparam(struct drm_device *dev, void *data,
730 struct drm_file *file_priv)
732 drm_i915_private_t *dev_priv = dev->dev_private;
733 drm_i915_getparam_t *param = data;
737 DRM_ERROR("called with no initialization\n");
741 switch (param->param) {
742 case I915_PARAM_IRQ_ACTIVE:
743 value = dev->pdev->irq ? 1 : 0;
745 case I915_PARAM_ALLOW_BATCHBUFFER:
746 value = dev_priv->allow_batchbuffer ? 1 : 0;
748 case I915_PARAM_LAST_DISPATCH:
749 value = READ_BREADCRUMB(dev_priv);
751 case I915_PARAM_CHIPSET_ID:
752 value = dev->pci_device;
754 case I915_PARAM_HAS_GEM:
755 value = dev_priv->has_gem;
757 case I915_PARAM_NUM_FENCES_AVAIL:
758 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
760 case I915_PARAM_HAS_OVERLAY:
761 value = dev_priv->overlay ? 1 : 0;
763 case I915_PARAM_HAS_PAGEFLIPPING:
766 case I915_PARAM_HAS_EXECBUF2:
768 value = dev_priv->has_gem;
770 case I915_PARAM_HAS_BSD:
771 value = HAS_BSD(dev);
773 case I915_PARAM_HAS_BLT:
774 value = HAS_BLT(dev);
776 case I915_PARAM_HAS_RELAXED_FENCING:
779 case I915_PARAM_HAS_COHERENT_RINGS:
782 case I915_PARAM_HAS_EXEC_CONSTANTS:
783 value = INTEL_INFO(dev)->gen >= 4;
786 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
791 if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
792 DRM_ERROR("DRM_COPY_TO_USER failed\n");
799 static int i915_setparam(struct drm_device *dev, void *data,
800 struct drm_file *file_priv)
802 drm_i915_private_t *dev_priv = dev->dev_private;
803 drm_i915_setparam_t *param = data;
806 DRM_ERROR("called with no initialization\n");
810 switch (param->param) {
811 case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
813 case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
814 dev_priv->tex_lru_log_granularity = param->value;
816 case I915_SETPARAM_ALLOW_BATCHBUFFER:
817 dev_priv->allow_batchbuffer = param->value;
819 case I915_SETPARAM_NUM_USED_FENCES:
820 if (param->value > dev_priv->num_fence_regs ||
823 /* Userspace can use first N regs */
824 dev_priv->fence_reg_start = param->value;
827 DRM_DEBUG_DRIVER("unknown parameter %d\n",
835 static int i915_set_status_page(struct drm_device *dev, void *data,
836 struct drm_file *file_priv)
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);
842 if (!I915_NEED_GFX_HWS(dev))
846 DRM_ERROR("called with no initialization\n");
850 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
851 WARN(1, "tried to set status page when mode setting active\n");
855 DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
857 ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
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;
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");
873 ring->status_page.page_addr = dev_priv->hws_map.handle;
874 memset(ring->status_page.page_addr, 0, PAGE_SIZE);
875 I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
877 DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
878 ring->status_page.gfx_addr);
879 DRM_DEBUG_DRIVER("load hws at %p\n",
880 ring->status_page.page_addr);
884 static int i915_get_bridge_dev(struct drm_device *dev)
886 struct drm_i915_private *dev_priv = dev->dev_private;
888 dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
889 if (!dev_priv->bridge_dev) {
890 DRM_ERROR("bridge device not found\n");
896 #define MCHBAR_I915 0x44
897 #define MCHBAR_I965 0x48
898 #define MCHBAR_SIZE (4*4096)
900 #define DEVEN_REG 0x54
901 #define DEVEN_MCHBAR_EN (1 << 28)
903 /* Allocate space for the MCH regs if needed, return nonzero on error */
905 intel_alloc_mchbar_resource(struct drm_device *dev)
907 drm_i915_private_t *dev_priv = dev->dev_private;
908 int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
909 u32 temp_lo, temp_hi = 0;
913 if (INTEL_INFO(dev)->gen >= 4)
914 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
915 pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
916 mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
918 /* If ACPI doesn't have it, assume we need to allocate it ourselves */
921 pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
925 /* Get some space for it */
926 dev_priv->mch_res.name = "i915 MCHBAR";
927 dev_priv->mch_res.flags = IORESOURCE_MEM;
928 ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
930 MCHBAR_SIZE, MCHBAR_SIZE,
932 0, pcibios_align_resource,
933 dev_priv->bridge_dev);
935 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
936 dev_priv->mch_res.start = 0;
940 if (INTEL_INFO(dev)->gen >= 4)
941 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
942 upper_32_bits(dev_priv->mch_res.start));
944 pci_write_config_dword(dev_priv->bridge_dev, reg,
945 lower_32_bits(dev_priv->mch_res.start));
949 /* Setup MCHBAR if possible, return true if we should disable it again */
951 intel_setup_mchbar(struct drm_device *dev)
953 drm_i915_private_t *dev_priv = dev->dev_private;
954 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
958 dev_priv->mchbar_need_disable = false;
960 if (IS_I915G(dev) || IS_I915GM(dev)) {
961 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
962 enabled = !!(temp & DEVEN_MCHBAR_EN);
964 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
968 /* If it's already enabled, don't have to do anything */
972 if (intel_alloc_mchbar_resource(dev))
975 dev_priv->mchbar_need_disable = true;
977 /* Space is allocated or reserved, so enable it. */
978 if (IS_I915G(dev) || IS_I915GM(dev)) {
979 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
980 temp | DEVEN_MCHBAR_EN);
982 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
983 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
988 intel_teardown_mchbar(struct drm_device *dev)
990 drm_i915_private_t *dev_priv = dev->dev_private;
991 int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
994 if (dev_priv->mchbar_need_disable) {
995 if (IS_I915G(dev) || IS_I915GM(dev)) {
996 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
997 temp &= ~DEVEN_MCHBAR_EN;
998 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1000 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1002 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1006 if (dev_priv->mch_res.start)
1007 release_resource(&dev_priv->mch_res);
1010 #define PTE_ADDRESS_MASK 0xfffff000
1011 #define PTE_ADDRESS_MASK_HIGH 0x000000f0 /* i915+ */
1012 #define PTE_MAPPING_TYPE_UNCACHED (0 << 1)
1013 #define PTE_MAPPING_TYPE_DCACHE (1 << 1) /* i830 only */
1014 #define PTE_MAPPING_TYPE_CACHED (3 << 1)
1015 #define PTE_MAPPING_TYPE_MASK (3 << 1)
1016 #define PTE_VALID (1 << 0)
1019 * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1022 * @offset: address to translate
1024 * Some chip functions require allocations from stolen space and need the
1025 * physical address of the memory in question.
1027 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1029 struct drm_i915_private *dev_priv = dev->dev_private;
1030 struct pci_dev *pdev = dev_priv->bridge_dev;
1034 /* On the machines I have tested the Graphics Base of Stolen Memory
1035 * is unreliable, so compute the base by subtracting the stolen memory
1036 * from the Top of Low Usable DRAM which is where the BIOS places
1037 * the graphics stolen memory.
1039 if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1040 /* top 32bits are reserved = 0 */
1041 pci_read_config_dword(pdev, 0xA4, &base);
1043 /* XXX presume 8xx is the same as i915 */
1044 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1047 if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1049 pci_read_config_word(pdev, 0xb0, &val);
1050 base = val >> 4 << 20;
1053 pci_read_config_byte(pdev, 0x9c, &val);
1054 base = val >> 3 << 27;
1056 base -= dev_priv->mm.gtt->stolen_size;
1059 return base + offset;
1062 static void i915_warn_stolen(struct drm_device *dev)
1064 DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1065 DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1068 static void i915_setup_compression(struct drm_device *dev, int size)
1070 struct drm_i915_private *dev_priv = dev->dev_private;
1071 struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1072 unsigned long cfb_base;
1073 unsigned long ll_base = 0;
1075 compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1077 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1081 cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1085 if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1086 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1089 compressed_llb = drm_mm_get_block(compressed_llb,
1091 if (!compressed_llb)
1094 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1099 dev_priv->cfb_size = size;
1101 intel_disable_fbc(dev);
1102 dev_priv->compressed_fb = compressed_fb;
1103 if (HAS_PCH_SPLIT(dev))
1104 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1105 else if (IS_GM45(dev)) {
1106 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1108 I915_WRITE(FBC_CFB_BASE, cfb_base);
1109 I915_WRITE(FBC_LL_BASE, ll_base);
1110 dev_priv->compressed_llb = compressed_llb;
1113 DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1114 cfb_base, ll_base, size >> 20);
1118 drm_mm_put_block(compressed_llb);
1120 drm_mm_put_block(compressed_fb);
1122 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1123 i915_warn_stolen(dev);
1126 static void i915_cleanup_compression(struct drm_device *dev)
1128 struct drm_i915_private *dev_priv = dev->dev_private;
1130 drm_mm_put_block(dev_priv->compressed_fb);
1131 if (dev_priv->compressed_llb)
1132 drm_mm_put_block(dev_priv->compressed_llb);
1135 /* true = enable decode, false = disable decoder */
1136 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1138 struct drm_device *dev = cookie;
1140 intel_modeset_vga_set_state(dev, state);
1142 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1143 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1145 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1148 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1150 struct drm_device *dev = pci_get_drvdata(pdev);
1151 pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1152 if (state == VGA_SWITCHEROO_ON) {
1153 printk(KERN_INFO "i915: switched on\n");
1154 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1155 /* i915 resume handler doesn't set to D0 */
1156 pci_set_power_state(dev->pdev, PCI_D0);
1158 dev->switch_power_state = DRM_SWITCH_POWER_ON;
1160 printk(KERN_ERR "i915: switched off\n");
1161 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1162 i915_suspend(dev, pmm);
1163 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1167 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1169 struct drm_device *dev = pci_get_drvdata(pdev);
1172 spin_lock(&dev->count_lock);
1173 can_switch = (dev->open_count == 0);
1174 spin_unlock(&dev->count_lock);
1178 static int i915_load_modeset_init(struct drm_device *dev)
1180 struct drm_i915_private *dev_priv = dev->dev_private;
1181 unsigned long prealloc_size, gtt_size, mappable_size;
1184 prealloc_size = dev_priv->mm.gtt->stolen_size;
1185 gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1186 mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1188 /* Basic memrange allocator for stolen space */
1189 drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1191 /* Let GEM Manage all of the aperture.
1193 * However, leave one page at the end still bound to the scratch page.
1194 * There are a number of places where the hardware apparently
1195 * prefetches past the end of the object, and we've seen multiple
1196 * hangs with the GPU head pointer stuck in a batchbuffer bound
1197 * at the last page of the aperture. One page should be enough to
1198 * keep any prefetching inside of the aperture.
1200 i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1202 mutex_lock(&dev->struct_mutex);
1203 ret = i915_gem_init_ringbuffer(dev);
1204 mutex_unlock(&dev->struct_mutex);
1208 /* Try to set up FBC with a reasonable compressed buffer size */
1209 if (I915_HAS_FBC(dev) && i915_powersave) {
1212 /* Leave 1M for line length buffer & misc. */
1214 /* Try to get a 32M buffer... */
1215 if (prealloc_size > (36*1024*1024))
1216 cfb_size = 32*1024*1024;
1217 else /* fall back to 7/8 of the stolen space */
1218 cfb_size = prealloc_size * 7 / 8;
1219 i915_setup_compression(dev, cfb_size);
1222 /* Allow hardware batchbuffers unless told otherwise. */
1223 dev_priv->allow_batchbuffer = 1;
1225 ret = intel_parse_bios(dev);
1227 DRM_INFO("failed to find VBIOS tables\n");
1229 /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1230 ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1232 goto cleanup_ringbuffer;
1234 intel_register_dsm_handler();
1236 ret = vga_switcheroo_register_client(dev->pdev,
1237 i915_switcheroo_set_state,
1239 i915_switcheroo_can_switch);
1241 goto cleanup_vga_client;
1243 /* IIR "flip pending" bit means done if this bit is set */
1244 if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1245 dev_priv->flip_pending_is_done = true;
1247 intel_modeset_init(dev);
1249 ret = drm_irq_install(dev);
1251 goto cleanup_vga_switcheroo;
1253 /* Always safe in the mode setting case. */
1254 /* FIXME: do pre/post-mode set stuff in core KMS code */
1255 dev->vblank_disable_allowed = 1;
1257 ret = intel_fbdev_init(dev);
1261 drm_kms_helper_poll_init(dev);
1263 /* We're off and running w/KMS */
1264 dev_priv->mm.suspended = 0;
1269 drm_irq_uninstall(dev);
1270 cleanup_vga_switcheroo:
1271 vga_switcheroo_unregister_client(dev->pdev);
1273 vga_client_register(dev->pdev, NULL, NULL, NULL);
1275 mutex_lock(&dev->struct_mutex);
1276 i915_gem_cleanup_ringbuffer(dev);
1277 mutex_unlock(&dev->struct_mutex);
1282 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1284 struct drm_i915_master_private *master_priv;
1286 master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1290 master->driver_priv = master_priv;
1294 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1296 struct drm_i915_master_private *master_priv = master->driver_priv;
1303 master->driver_priv = NULL;
1306 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1308 drm_i915_private_t *dev_priv = dev->dev_private;
1311 tmp = I915_READ(CLKCFG);
1313 switch (tmp & CLKCFG_FSB_MASK) {
1314 case CLKCFG_FSB_533:
1315 dev_priv->fsb_freq = 533; /* 133*4 */
1317 case CLKCFG_FSB_800:
1318 dev_priv->fsb_freq = 800; /* 200*4 */
1320 case CLKCFG_FSB_667:
1321 dev_priv->fsb_freq = 667; /* 167*4 */
1323 case CLKCFG_FSB_400:
1324 dev_priv->fsb_freq = 400; /* 100*4 */
1328 switch (tmp & CLKCFG_MEM_MASK) {
1329 case CLKCFG_MEM_533:
1330 dev_priv->mem_freq = 533;
1332 case CLKCFG_MEM_667:
1333 dev_priv->mem_freq = 667;
1335 case CLKCFG_MEM_800:
1336 dev_priv->mem_freq = 800;
1340 /* detect pineview DDR3 setting */
1341 tmp = I915_READ(CSHRDDR3CTL);
1342 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1345 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1347 drm_i915_private_t *dev_priv = dev->dev_private;
1350 ddrpll = I915_READ16(DDRMPLL1);
1351 csipll = I915_READ16(CSIPLL0);
1353 switch (ddrpll & 0xff) {
1355 dev_priv->mem_freq = 800;
1358 dev_priv->mem_freq = 1066;
1361 dev_priv->mem_freq = 1333;
1364 dev_priv->mem_freq = 1600;
1367 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1369 dev_priv->mem_freq = 0;
1373 dev_priv->r_t = dev_priv->mem_freq;
1375 switch (csipll & 0x3ff) {
1377 dev_priv->fsb_freq = 3200;
1380 dev_priv->fsb_freq = 3733;
1383 dev_priv->fsb_freq = 4266;
1386 dev_priv->fsb_freq = 4800;
1389 dev_priv->fsb_freq = 5333;
1392 dev_priv->fsb_freq = 5866;
1395 dev_priv->fsb_freq = 6400;
1398 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1400 dev_priv->fsb_freq = 0;
1404 if (dev_priv->fsb_freq == 3200) {
1406 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1413 static const struct cparams {
1419 { 1, 1333, 301, 28664 },
1420 { 1, 1066, 294, 24460 },
1421 { 1, 800, 294, 25192 },
1422 { 0, 1333, 276, 27605 },
1423 { 0, 1066, 276, 27605 },
1424 { 0, 800, 231, 23784 },
1427 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1429 u64 total_count, diff, ret;
1430 u32 count1, count2, count3, m = 0, c = 0;
1431 unsigned long now = jiffies_to_msecs(jiffies), diff1;
1434 diff1 = now - dev_priv->last_time1;
1436 count1 = I915_READ(DMIEC);
1437 count2 = I915_READ(DDREC);
1438 count3 = I915_READ(CSIEC);
1440 total_count = count1 + count2 + count3;
1442 /* FIXME: handle per-counter overflow */
1443 if (total_count < dev_priv->last_count1) {
1444 diff = ~0UL - dev_priv->last_count1;
1445 diff += total_count;
1447 diff = total_count - dev_priv->last_count1;
1450 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1451 if (cparams[i].i == dev_priv->c_m &&
1452 cparams[i].t == dev_priv->r_t) {
1459 diff = div_u64(diff, diff1);
1460 ret = ((m * diff) + c);
1461 ret = div_u64(ret, 10);
1463 dev_priv->last_count1 = total_count;
1464 dev_priv->last_time1 = now;
1469 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1471 unsigned long m, x, b;
1474 tsfs = I915_READ(TSFS);
1476 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1477 x = I915_READ8(TR1);
1479 b = tsfs & TSFS_INTR_MASK;
1481 return ((m * x) / 127) - b;
1484 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1486 static const struct v_table {
1487 u16 vd; /* in .1 mil */
1488 u16 vm; /* in .1 mil */
1619 if (dev_priv->info->is_mobile)
1620 return v_table[pxvid].vm;
1622 return v_table[pxvid].vd;
1625 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1627 struct timespec now, diff1;
1629 unsigned long diffms;
1632 getrawmonotonic(&now);
1633 diff1 = timespec_sub(now, dev_priv->last_time2);
1635 /* Don't divide by 0 */
1636 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1640 count = I915_READ(GFXEC);
1642 if (count < dev_priv->last_count2) {
1643 diff = ~0UL - dev_priv->last_count2;
1646 diff = count - dev_priv->last_count2;
1649 dev_priv->last_count2 = count;
1650 dev_priv->last_time2 = now;
1652 /* More magic constants... */
1654 diff = div_u64(diff, diffms * 10);
1655 dev_priv->gfx_power = diff;
1658 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1660 unsigned long t, corr, state1, corr2, state2;
1663 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1664 pxvid = (pxvid >> 24) & 0x7f;
1665 ext_v = pvid_to_extvid(dev_priv, pxvid);
1669 t = i915_mch_val(dev_priv);
1671 /* Revel in the empirically derived constants */
1673 /* Correction factor in 1/100000 units */
1675 corr = ((t * 2349) + 135940);
1677 corr = ((t * 964) + 29317);
1679 corr = ((t * 301) + 1004);
1681 corr = corr * ((150142 * state1) / 10000 - 78642);
1683 corr2 = (corr * dev_priv->corr);
1685 state2 = (corr2 * state1) / 10000;
1686 state2 /= 100; /* convert to mW */
1688 i915_update_gfx_val(dev_priv);
1690 return dev_priv->gfx_power + state2;
1693 /* Global for IPS driver to get at the current i915 device */
1694 static struct drm_i915_private *i915_mch_dev;
1696 * Lock protecting IPS related data structures
1698 * - dev_priv->max_delay
1699 * - dev_priv->min_delay
1701 * - dev_priv->gpu_busy
1703 static DEFINE_SPINLOCK(mchdev_lock);
1706 * i915_read_mch_val - return value for IPS use
1708 * Calculate and return a value for the IPS driver to use when deciding whether
1709 * we have thermal and power headroom to increase CPU or GPU power budget.
1711 unsigned long i915_read_mch_val(void)
1713 struct drm_i915_private *dev_priv;
1714 unsigned long chipset_val, graphics_val, ret = 0;
1716 spin_lock(&mchdev_lock);
1719 dev_priv = i915_mch_dev;
1721 chipset_val = i915_chipset_val(dev_priv);
1722 graphics_val = i915_gfx_val(dev_priv);
1724 ret = chipset_val + graphics_val;
1727 spin_unlock(&mchdev_lock);
1731 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1734 * i915_gpu_raise - raise GPU frequency limit
1736 * Raise the limit; IPS indicates we have thermal headroom.
1738 bool i915_gpu_raise(void)
1740 struct drm_i915_private *dev_priv;
1743 spin_lock(&mchdev_lock);
1744 if (!i915_mch_dev) {
1748 dev_priv = i915_mch_dev;
1750 if (dev_priv->max_delay > dev_priv->fmax)
1751 dev_priv->max_delay--;
1754 spin_unlock(&mchdev_lock);
1758 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1761 * i915_gpu_lower - lower GPU frequency limit
1763 * IPS indicates we're close to a thermal limit, so throttle back the GPU
1764 * frequency maximum.
1766 bool i915_gpu_lower(void)
1768 struct drm_i915_private *dev_priv;
1771 spin_lock(&mchdev_lock);
1772 if (!i915_mch_dev) {
1776 dev_priv = i915_mch_dev;
1778 if (dev_priv->max_delay < dev_priv->min_delay)
1779 dev_priv->max_delay++;
1782 spin_unlock(&mchdev_lock);
1786 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1789 * i915_gpu_busy - indicate GPU business to IPS
1791 * Tell the IPS driver whether or not the GPU is busy.
1793 bool i915_gpu_busy(void)
1795 struct drm_i915_private *dev_priv;
1798 spin_lock(&mchdev_lock);
1801 dev_priv = i915_mch_dev;
1803 ret = dev_priv->busy;
1806 spin_unlock(&mchdev_lock);
1810 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1813 * i915_gpu_turbo_disable - disable graphics turbo
1815 * Disable graphics turbo by resetting the max frequency and setting the
1816 * current frequency to the default.
1818 bool i915_gpu_turbo_disable(void)
1820 struct drm_i915_private *dev_priv;
1823 spin_lock(&mchdev_lock);
1824 if (!i915_mch_dev) {
1828 dev_priv = i915_mch_dev;
1830 dev_priv->max_delay = dev_priv->fstart;
1832 if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1836 spin_unlock(&mchdev_lock);
1840 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1843 * Tells the intel_ips driver that the i915 driver is now loaded, if
1844 * IPS got loaded first.
1846 * This awkward dance is so that neither module has to depend on the
1847 * other in order for IPS to do the appropriate communication of
1848 * GPU turbo limits to i915.
1851 ips_ping_for_i915_load(void)
1855 link = symbol_get(ips_link_to_i915_driver);
1858 symbol_put(ips_link_to_i915_driver);
1863 * i915_driver_load - setup chip and create an initial config
1865 * @flags: startup flags
1867 * The driver load routine has to do several things:
1868 * - drive output discovery via intel_modeset_init()
1869 * - initialize the memory manager
1870 * - allocate initial config memory
1871 * - setup the DRM framebuffer with the allocated memory
1873 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1875 struct drm_i915_private *dev_priv;
1876 int ret = 0, mmio_bar;
1879 /* i915 has 4 more counters */
1881 dev->types[6] = _DRM_STAT_IRQ;
1882 dev->types[7] = _DRM_STAT_PRIMARY;
1883 dev->types[8] = _DRM_STAT_SECONDARY;
1884 dev->types[9] = _DRM_STAT_DMA;
1886 dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1887 if (dev_priv == NULL)
1890 dev->dev_private = (void *)dev_priv;
1891 dev_priv->dev = dev;
1892 dev_priv->info = (struct intel_device_info *) flags;
1894 if (i915_get_bridge_dev(dev)) {
1899 /* overlay on gen2 is broken and can't address above 1G */
1901 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1903 mmio_bar = IS_GEN2(dev) ? 1 : 0;
1904 dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1905 if (!dev_priv->regs) {
1906 DRM_ERROR("failed to map registers\n");
1911 dev_priv->mm.gtt = intel_gtt_get();
1912 if (!dev_priv->mm.gtt) {
1913 DRM_ERROR("Failed to initialize GTT\n");
1918 agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1920 dev_priv->mm.gtt_mapping =
1921 io_mapping_create_wc(dev->agp->base, agp_size);
1922 if (dev_priv->mm.gtt_mapping == NULL) {
1927 /* Set up a WC MTRR for non-PAT systems. This is more common than
1928 * one would think, because the kernel disables PAT on first
1929 * generation Core chips because WC PAT gets overridden by a UC
1930 * MTRR if present. Even if a UC MTRR isn't present.
1932 dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1934 MTRR_TYPE_WRCOMB, 1);
1935 if (dev_priv->mm.gtt_mtrr < 0) {
1936 DRM_INFO("MTRR allocation failed. Graphics "
1937 "performance may suffer.\n");
1940 /* The i915 workqueue is primarily used for batched retirement of
1941 * requests (and thus managing bo) once the task has been completed
1942 * by the GPU. i915_gem_retire_requests() is called directly when we
1943 * need high-priority retirement, such as waiting for an explicit
1946 * It is also used for periodic low-priority events, such as
1947 * idle-timers and recording error state.
1949 * All tasks on the workqueue are expected to acquire the dev mutex
1950 * so there is no point in running more than one instance of the
1951 * workqueue at any time: max_active = 1 and NON_REENTRANT.
1953 dev_priv->wq = alloc_workqueue("i915",
1954 WQ_UNBOUND | WQ_NON_REENTRANT,
1956 if (dev_priv->wq == NULL) {
1957 DRM_ERROR("Failed to create our workqueue.\n");
1962 /* enable GEM by default */
1963 dev_priv->has_gem = 1;
1965 dev->driver->get_vblank_counter = i915_get_vblank_counter;
1966 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1967 if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
1968 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1969 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1972 /* Try to make sure MCHBAR is enabled before poking at it */
1973 intel_setup_mchbar(dev);
1974 intel_setup_gmbus(dev);
1975 intel_opregion_setup(dev);
1977 /* Make sure the bios did its job and set up vital registers */
1978 intel_setup_bios(dev);
1983 if (!I915_NEED_GFX_HWS(dev)) {
1984 ret = i915_init_phys_hws(dev);
1986 goto out_gem_unload;
1989 if (IS_PINEVIEW(dev))
1990 i915_pineview_get_mem_freq(dev);
1991 else if (IS_GEN5(dev))
1992 i915_ironlake_get_mem_freq(dev);
1994 /* On the 945G/GM, the chipset reports the MSI capability on the
1995 * integrated graphics even though the support isn't actually there
1996 * according to the published specs. It doesn't appear to function
1997 * correctly in testing on 945G.
1998 * This may be a side effect of MSI having been made available for PEG
1999 * and the registers being closely associated.
2001 * According to chipset errata, on the 965GM, MSI interrupts may
2002 * be lost or delayed, but we use them anyways to avoid
2003 * stuck interrupts on some machines.
2005 if (!IS_I945G(dev) && !IS_I945GM(dev))
2006 pci_enable_msi(dev->pdev);
2008 spin_lock_init(&dev_priv->irq_lock);
2009 spin_lock_init(&dev_priv->error_lock);
2010 dev_priv->trace_irq_seqno = 0;
2012 ret = drm_vblank_init(dev, I915_NUM_PIPE);
2014 goto out_gem_unload;
2016 /* Start out suspended */
2017 dev_priv->mm.suspended = 1;
2019 intel_detect_pch(dev);
2021 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2022 ret = i915_load_modeset_init(dev);
2024 DRM_ERROR("failed to init modeset\n");
2025 goto out_gem_unload;
2029 /* Must be done after probing outputs */
2030 intel_opregion_init(dev);
2031 acpi_video_register();
2033 setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2034 (unsigned long) dev);
2036 spin_lock(&mchdev_lock);
2037 i915_mch_dev = dev_priv;
2038 dev_priv->mchdev_lock = &mchdev_lock;
2039 spin_unlock(&mchdev_lock);
2041 ips_ping_for_i915_load();
2046 if (dev->pdev->msi_enabled)
2047 pci_disable_msi(dev->pdev);
2049 intel_teardown_gmbus(dev);
2050 intel_teardown_mchbar(dev);
2051 destroy_workqueue(dev_priv->wq);
2053 io_mapping_free(dev_priv->mm.gtt_mapping);
2055 pci_iounmap(dev->pdev, dev_priv->regs);
2057 pci_dev_put(dev_priv->bridge_dev);
2063 int i915_driver_unload(struct drm_device *dev)
2065 struct drm_i915_private *dev_priv = dev->dev_private;
2068 spin_lock(&mchdev_lock);
2069 i915_mch_dev = NULL;
2070 spin_unlock(&mchdev_lock);
2072 if (dev_priv->mm.inactive_shrinker.shrink)
2073 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2075 mutex_lock(&dev->struct_mutex);
2076 ret = i915_gpu_idle(dev);
2078 DRM_ERROR("failed to idle hardware: %d\n", ret);
2079 mutex_unlock(&dev->struct_mutex);
2081 /* Cancel the retire work handler, which should be idle now. */
2082 cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2084 io_mapping_free(dev_priv->mm.gtt_mapping);
2085 if (dev_priv->mm.gtt_mtrr >= 0) {
2086 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2087 dev->agp->agp_info.aper_size * 1024 * 1024);
2088 dev_priv->mm.gtt_mtrr = -1;
2091 acpi_video_unregister();
2093 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2094 intel_fbdev_fini(dev);
2095 intel_modeset_cleanup(dev);
2098 * free the memory space allocated for the child device
2099 * config parsed from VBT
2101 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2102 kfree(dev_priv->child_dev);
2103 dev_priv->child_dev = NULL;
2104 dev_priv->child_dev_num = 0;
2107 vga_switcheroo_unregister_client(dev->pdev);
2108 vga_client_register(dev->pdev, NULL, NULL, NULL);
2111 /* Free error state after interrupts are fully disabled. */
2112 del_timer_sync(&dev_priv->hangcheck_timer);
2113 cancel_work_sync(&dev_priv->error_work);
2114 i915_destroy_error_state(dev);
2116 if (dev->pdev->msi_enabled)
2117 pci_disable_msi(dev->pdev);
2119 intel_opregion_fini(dev);
2121 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2122 /* Flush any outstanding unpin_work. */
2123 flush_workqueue(dev_priv->wq);
2125 i915_gem_free_all_phys_object(dev);
2127 mutex_lock(&dev->struct_mutex);
2128 i915_gem_cleanup_ringbuffer(dev);
2129 mutex_unlock(&dev->struct_mutex);
2130 if (I915_HAS_FBC(dev) && i915_powersave)
2131 i915_cleanup_compression(dev);
2132 drm_mm_takedown(&dev_priv->mm.stolen);
2134 intel_cleanup_overlay(dev);
2136 if (!I915_NEED_GFX_HWS(dev))
2140 if (dev_priv->regs != NULL)
2141 pci_iounmap(dev->pdev, dev_priv->regs);
2143 intel_teardown_gmbus(dev);
2144 intel_teardown_mchbar(dev);
2146 destroy_workqueue(dev_priv->wq);
2148 pci_dev_put(dev_priv->bridge_dev);
2149 kfree(dev->dev_private);
2154 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2156 struct drm_i915_file_private *file_priv;
2158 DRM_DEBUG_DRIVER("\n");
2159 file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2163 file->driver_priv = file_priv;
2165 spin_lock_init(&file_priv->mm.lock);
2166 INIT_LIST_HEAD(&file_priv->mm.request_list);
2172 * i915_driver_lastclose - clean up after all DRM clients have exited
2175 * Take care of cleaning up after all DRM clients have exited. In the
2176 * mode setting case, we want to restore the kernel's initial mode (just
2177 * in case the last client left us in a bad state).
2179 * Additionally, in the non-mode setting case, we'll tear down the AGP
2180 * and DMA structures, since the kernel won't be using them, and clea
2183 void i915_driver_lastclose(struct drm_device * dev)
2185 drm_i915_private_t *dev_priv = dev->dev_private;
2187 if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2188 drm_fb_helper_restore();
2189 vga_switcheroo_process_delayed_switch();
2193 i915_gem_lastclose(dev);
2195 if (dev_priv->agp_heap)
2196 i915_mem_takedown(&(dev_priv->agp_heap));
2198 i915_dma_cleanup(dev);
2201 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2203 drm_i915_private_t *dev_priv = dev->dev_private;
2204 i915_gem_release(dev, file_priv);
2205 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2206 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2209 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2211 struct drm_i915_file_private *file_priv = file->driver_priv;
2216 struct drm_ioctl_desc i915_ioctls[] = {
2217 DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2218 DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2219 DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2220 DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2221 DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2222 DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2223 DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2224 DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2225 DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2226 DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2227 DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2228 DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2229 DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2230 DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2231 DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, i915_vblank_pipe_get, DRM_AUTH),
2232 DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2233 DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2234 DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2235 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2236 DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2237 DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2238 DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2239 DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2240 DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2241 DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2242 DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2243 DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2244 DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2245 DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2246 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2247 DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2248 DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2249 DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2250 DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2251 DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2252 DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2253 DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2254 DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2255 DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2256 DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2259 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2262 * Determine if the device really is AGP or not.
2264 * All Intel graphics chipsets are treated as AGP, even if they are really
2267 * \param dev The device to be tested.
2270 * A value of 1 is always retured to indictate every i9x5 is AGP.
2272 int i915_driver_device_is_agp(struct drm_device * dev)