2 * Copyright © 2008-2010 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
25 * Zou Nan hai <nanhai.zou@intel.com>
26 * Xiang Hai hao<haihao.xiang@intel.com>
34 #include "i915_trace.h"
36 static u32
i915_gem_get_seqno(struct drm_device
*dev
)
38 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
41 seqno
= dev_priv
->next_seqno
;
43 /* reserve 0 for non-seqno */
44 if (++dev_priv
->next_seqno
== 0)
45 dev_priv
->next_seqno
= 1;
51 render_ring_flush(struct drm_device
*dev
,
52 struct intel_ring_buffer
*ring
,
53 u32 invalidate_domains
,
56 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
60 DRM_INFO("%s: invalidate %08x flush %08x\n", __func__
,
61 invalidate_domains
, flush_domains
);
64 trace_i915_gem_request_flush(dev
, dev_priv
->next_seqno
,
65 invalidate_domains
, flush_domains
);
67 if ((invalidate_domains
| flush_domains
) & I915_GEM_GPU_DOMAINS
) {
71 * I915_GEM_DOMAIN_RENDER is always invalidated, but is
72 * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is
73 * also flushed at 2d versus 3d pipeline switches.
77 * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if
78 * MI_READ_FLUSH is set, and is always flushed on 965.
80 * I915_GEM_DOMAIN_COMMAND may not exist?
82 * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is
83 * invalidated when MI_EXE_FLUSH is set.
85 * I915_GEM_DOMAIN_VERTEX, which exists on 965, is
86 * invalidated with every MI_FLUSH.
90 * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND
91 * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and
92 * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER
93 * are flushed at any MI_FLUSH.
96 cmd
= MI_FLUSH
| MI_NO_WRITE_FLUSH
;
97 if ((invalidate_domains
|flush_domains
) &
98 I915_GEM_DOMAIN_RENDER
)
99 cmd
&= ~MI_NO_WRITE_FLUSH
;
100 if (!IS_I965G(dev
)) {
102 * On the 965, the sampler cache always gets flushed
103 * and this bit is reserved.
105 if (invalidate_domains
& I915_GEM_DOMAIN_SAMPLER
)
106 cmd
|= MI_READ_FLUSH
;
108 if (invalidate_domains
& I915_GEM_DOMAIN_INSTRUCTION
)
112 DRM_INFO("%s: queue flush %08x to ring\n", __func__
, cmd
);
114 intel_ring_begin(dev
, ring
, 2);
115 intel_ring_emit(dev
, ring
, cmd
);
116 intel_ring_emit(dev
, ring
, MI_NOOP
);
117 intel_ring_advance(dev
, ring
);
121 static unsigned int render_ring_get_head(struct drm_device
*dev
,
122 struct intel_ring_buffer
*ring
)
124 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
125 return I915_READ(PRB0_HEAD
) & HEAD_ADDR
;
128 static unsigned int render_ring_get_tail(struct drm_device
*dev
,
129 struct intel_ring_buffer
*ring
)
131 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
132 return I915_READ(PRB0_TAIL
) & TAIL_ADDR
;
135 static unsigned int render_ring_get_active_head(struct drm_device
*dev
,
136 struct intel_ring_buffer
*ring
)
138 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
139 u32 acthd_reg
= IS_I965G(dev
) ? ACTHD_I965
: ACTHD
;
141 return I915_READ(acthd_reg
);
144 static void render_ring_advance_ring(struct drm_device
*dev
,
145 struct intel_ring_buffer
*ring
)
147 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
148 I915_WRITE(PRB0_TAIL
, ring
->tail
);
151 static int init_ring_common(struct drm_device
*dev
,
152 struct intel_ring_buffer
*ring
)
155 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
156 struct drm_i915_gem_object
*obj_priv
;
157 obj_priv
= to_intel_bo(ring
->gem_object
);
159 /* Stop the ring if it's running. */
160 I915_WRITE(ring
->regs
.ctl
, 0);
161 I915_WRITE(ring
->regs
.head
, 0);
162 I915_WRITE(ring
->regs
.tail
, 0);
164 /* Initialize the ring. */
165 I915_WRITE(ring
->regs
.start
, obj_priv
->gtt_offset
);
166 head
= ring
->get_head(dev
, ring
);
168 /* G45 ring initialization fails to reset head to zero */
170 DRM_ERROR("%s head not reset to zero "
171 "ctl %08x head %08x tail %08x start %08x\n",
173 I915_READ(ring
->regs
.ctl
),
174 I915_READ(ring
->regs
.head
),
175 I915_READ(ring
->regs
.tail
),
176 I915_READ(ring
->regs
.start
));
178 I915_WRITE(ring
->regs
.head
, 0);
180 DRM_ERROR("%s head forced to zero "
181 "ctl %08x head %08x tail %08x start %08x\n",
183 I915_READ(ring
->regs
.ctl
),
184 I915_READ(ring
->regs
.head
),
185 I915_READ(ring
->regs
.tail
),
186 I915_READ(ring
->regs
.start
));
189 I915_WRITE(ring
->regs
.ctl
,
190 ((ring
->gem_object
->size
- PAGE_SIZE
) & RING_NR_PAGES
)
191 | RING_NO_REPORT
| RING_VALID
);
193 head
= I915_READ(ring
->regs
.head
) & HEAD_ADDR
;
194 /* If the head is still not zero, the ring is dead */
196 DRM_ERROR("%s initialization failed "
197 "ctl %08x head %08x tail %08x start %08x\n",
199 I915_READ(ring
->regs
.ctl
),
200 I915_READ(ring
->regs
.head
),
201 I915_READ(ring
->regs
.tail
),
202 I915_READ(ring
->regs
.start
));
206 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
207 i915_kernel_lost_context(dev
);
209 ring
->head
= ring
->get_head(dev
, ring
);
210 ring
->tail
= ring
->get_tail(dev
, ring
);
211 ring
->space
= ring
->head
- (ring
->tail
+ 8);
213 ring
->space
+= ring
->size
;
218 static int init_render_ring(struct drm_device
*dev
,
219 struct intel_ring_buffer
*ring
)
221 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
222 int ret
= init_ring_common(dev
, ring
);
223 if (IS_I9XX(dev
) && !IS_GEN3(dev
)) {
225 (VS_TIMER_DISPATCH
) << 16 | VS_TIMER_DISPATCH
);
230 #define PIPE_CONTROL_FLUSH(addr) \
232 OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | \
233 PIPE_CONTROL_DEPTH_STALL | 2); \
234 OUT_RING(addr | PIPE_CONTROL_GLOBAL_GTT); \
240 * Creates a new sequence number, emitting a write of it to the status page
241 * plus an interrupt, which will trigger i915_user_interrupt_handler.
243 * Must be called with struct_lock held.
245 * Returned sequence numbers are nonzero on success.
248 render_ring_add_request(struct drm_device
*dev
,
249 struct intel_ring_buffer
*ring
,
250 struct drm_file
*file_priv
,
253 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
256 seqno
= i915_gem_get_seqno(dev
);
260 OUT_RING(GFX_OP_PIPE_CONTROL
| 3);
261 OUT_RING(PIPE_CONTROL_QW_WRITE
|
262 PIPE_CONTROL_WC_FLUSH
| PIPE_CONTROL_IS_FLUSH
|
263 PIPE_CONTROL_NOTIFY
);
264 OUT_RING(dev_priv
->seqno_gfx_addr
| PIPE_CONTROL_GLOBAL_GTT
);
269 } else if (HAS_PIPE_CONTROL(dev
)) {
270 u32 scratch_addr
= dev_priv
->seqno_gfx_addr
+ 128;
273 * Workaround qword write incoherence by flushing the
274 * PIPE_NOTIFY buffers out to memory before requesting
278 OUT_RING(GFX_OP_PIPE_CONTROL
| PIPE_CONTROL_QW_WRITE
|
279 PIPE_CONTROL_WC_FLUSH
| PIPE_CONTROL_TC_FLUSH
);
280 OUT_RING(dev_priv
->seqno_gfx_addr
| PIPE_CONTROL_GLOBAL_GTT
);
283 PIPE_CONTROL_FLUSH(scratch_addr
);
284 scratch_addr
+= 128; /* write to separate cachelines */
285 PIPE_CONTROL_FLUSH(scratch_addr
);
287 PIPE_CONTROL_FLUSH(scratch_addr
);
289 PIPE_CONTROL_FLUSH(scratch_addr
);
291 PIPE_CONTROL_FLUSH(scratch_addr
);
293 PIPE_CONTROL_FLUSH(scratch_addr
);
294 OUT_RING(GFX_OP_PIPE_CONTROL
| PIPE_CONTROL_QW_WRITE
|
295 PIPE_CONTROL_WC_FLUSH
| PIPE_CONTROL_TC_FLUSH
|
296 PIPE_CONTROL_NOTIFY
);
297 OUT_RING(dev_priv
->seqno_gfx_addr
| PIPE_CONTROL_GLOBAL_GTT
);
303 OUT_RING(MI_STORE_DWORD_INDEX
);
304 OUT_RING(I915_GEM_HWS_INDEX
<< MI_STORE_DWORD_INDEX_SHIFT
);
307 OUT_RING(MI_USER_INTERRUPT
);
314 render_ring_get_gem_seqno(struct drm_device
*dev
,
315 struct intel_ring_buffer
*ring
)
317 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
318 if (HAS_PIPE_CONTROL(dev
))
319 return ((volatile u32
*)(dev_priv
->seqno_page
))[0];
321 return intel_read_status_page(ring
, I915_GEM_HWS_INDEX
);
325 render_ring_get_user_irq(struct drm_device
*dev
,
326 struct intel_ring_buffer
*ring
)
328 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
329 unsigned long irqflags
;
331 spin_lock_irqsave(&dev_priv
->user_irq_lock
, irqflags
);
332 if (dev
->irq_enabled
&& (++ring
->user_irq_refcount
== 1)) {
333 if (HAS_PCH_SPLIT(dev
))
334 ironlake_enable_graphics_irq(dev_priv
, GT_PIPE_NOTIFY
);
336 i915_enable_irq(dev_priv
, I915_USER_INTERRUPT
);
338 spin_unlock_irqrestore(&dev_priv
->user_irq_lock
, irqflags
);
342 render_ring_put_user_irq(struct drm_device
*dev
,
343 struct intel_ring_buffer
*ring
)
345 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
346 unsigned long irqflags
;
348 spin_lock_irqsave(&dev_priv
->user_irq_lock
, irqflags
);
349 BUG_ON(dev
->irq_enabled
&& ring
->user_irq_refcount
<= 0);
350 if (dev
->irq_enabled
&& (--ring
->user_irq_refcount
== 0)) {
351 if (HAS_PCH_SPLIT(dev
))
352 ironlake_disable_graphics_irq(dev_priv
, GT_PIPE_NOTIFY
);
354 i915_disable_irq(dev_priv
, I915_USER_INTERRUPT
);
356 spin_unlock_irqrestore(&dev_priv
->user_irq_lock
, irqflags
);
359 static void render_setup_status_page(struct drm_device
*dev
,
360 struct intel_ring_buffer
*ring
)
362 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
364 I915_WRITE(HWS_PGA_GEN6
, ring
->status_page
.gfx_addr
);
365 I915_READ(HWS_PGA_GEN6
); /* posting read */
367 I915_WRITE(HWS_PGA
, ring
->status_page
.gfx_addr
);
368 I915_READ(HWS_PGA
); /* posting read */
374 bsd_ring_flush(struct drm_device
*dev
,
375 struct intel_ring_buffer
*ring
,
376 u32 invalidate_domains
,
379 intel_ring_begin(dev
, ring
, 2);
380 intel_ring_emit(dev
, ring
, MI_FLUSH
);
381 intel_ring_emit(dev
, ring
, MI_NOOP
);
382 intel_ring_advance(dev
, ring
);
385 static inline unsigned int bsd_ring_get_head(struct drm_device
*dev
,
386 struct intel_ring_buffer
*ring
)
388 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
389 return I915_READ(BSD_RING_HEAD
) & HEAD_ADDR
;
392 static inline unsigned int bsd_ring_get_tail(struct drm_device
*dev
,
393 struct intel_ring_buffer
*ring
)
395 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
396 return I915_READ(BSD_RING_TAIL
) & TAIL_ADDR
;
399 static inline unsigned int bsd_ring_get_active_head(struct drm_device
*dev
,
400 struct intel_ring_buffer
*ring
)
402 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
403 return I915_READ(BSD_RING_ACTHD
);
406 static inline void bsd_ring_advance_ring(struct drm_device
*dev
,
407 struct intel_ring_buffer
*ring
)
409 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
410 I915_WRITE(BSD_RING_TAIL
, ring
->tail
);
413 static int init_bsd_ring(struct drm_device
*dev
,
414 struct intel_ring_buffer
*ring
)
416 return init_ring_common(dev
, ring
);
420 bsd_ring_add_request(struct drm_device
*dev
,
421 struct intel_ring_buffer
*ring
,
422 struct drm_file
*file_priv
,
427 seqno
= i915_gem_get_seqno(dev
);
429 intel_ring_begin(dev
, ring
, 4);
430 intel_ring_emit(dev
, ring
, MI_STORE_DWORD_INDEX
);
431 intel_ring_emit(dev
, ring
,
432 I915_GEM_HWS_INDEX
<< MI_STORE_DWORD_INDEX_SHIFT
);
433 intel_ring_emit(dev
, ring
, seqno
);
434 intel_ring_emit(dev
, ring
, MI_USER_INTERRUPT
);
435 intel_ring_advance(dev
, ring
);
437 DRM_DEBUG_DRIVER("%s %d\n", ring
->name
, seqno
);
442 static void bsd_setup_status_page(struct drm_device
*dev
,
443 struct intel_ring_buffer
*ring
)
445 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
446 I915_WRITE(BSD_HWS_PGA
, ring
->status_page
.gfx_addr
);
447 I915_READ(BSD_HWS_PGA
);
451 bsd_ring_get_user_irq(struct drm_device
*dev
,
452 struct intel_ring_buffer
*ring
)
457 bsd_ring_put_user_irq(struct drm_device
*dev
,
458 struct intel_ring_buffer
*ring
)
464 bsd_ring_get_gem_seqno(struct drm_device
*dev
,
465 struct intel_ring_buffer
*ring
)
467 return intel_read_status_page(ring
, I915_GEM_HWS_INDEX
);
471 bsd_ring_dispatch_gem_execbuffer(struct drm_device
*dev
,
472 struct intel_ring_buffer
*ring
,
473 struct drm_i915_gem_execbuffer2
*exec
,
474 struct drm_clip_rect
*cliprects
,
475 uint64_t exec_offset
)
478 exec_start
= (uint32_t) exec_offset
+ exec
->batch_start_offset
;
479 intel_ring_begin(dev
, ring
, 2);
480 intel_ring_emit(dev
, ring
, MI_BATCH_BUFFER_START
|
481 (2 << 6) | MI_BATCH_NON_SECURE_I965
);
482 intel_ring_emit(dev
, ring
, exec_start
);
483 intel_ring_advance(dev
, ring
);
489 render_ring_dispatch_gem_execbuffer(struct drm_device
*dev
,
490 struct intel_ring_buffer
*ring
,
491 struct drm_i915_gem_execbuffer2
*exec
,
492 struct drm_clip_rect
*cliprects
,
493 uint64_t exec_offset
)
495 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
496 int nbox
= exec
->num_cliprects
;
498 uint32_t exec_start
, exec_len
;
499 exec_start
= (uint32_t) exec_offset
+ exec
->batch_start_offset
;
500 exec_len
= (uint32_t) exec
->batch_len
;
502 trace_i915_gem_request_submit(dev
, dev_priv
->next_seqno
+ 1);
504 count
= nbox
? nbox
: 1;
506 for (i
= 0; i
< count
; i
++) {
508 int ret
= i915_emit_box(dev
, cliprects
, i
,
509 exec
->DR1
, exec
->DR4
);
514 if (IS_I830(dev
) || IS_845G(dev
)) {
515 intel_ring_begin(dev
, ring
, 4);
516 intel_ring_emit(dev
, ring
, MI_BATCH_BUFFER
);
517 intel_ring_emit(dev
, ring
,
518 exec_start
| MI_BATCH_NON_SECURE
);
519 intel_ring_emit(dev
, ring
, exec_start
+ exec_len
- 4);
520 intel_ring_emit(dev
, ring
, 0);
522 intel_ring_begin(dev
, ring
, 4);
524 intel_ring_emit(dev
, ring
,
525 MI_BATCH_BUFFER_START
| (2 << 6)
526 | MI_BATCH_NON_SECURE_I965
);
527 intel_ring_emit(dev
, ring
, exec_start
);
529 intel_ring_emit(dev
, ring
, MI_BATCH_BUFFER_START
531 intel_ring_emit(dev
, ring
, exec_start
|
532 MI_BATCH_NON_SECURE
);
535 intel_ring_advance(dev
, ring
);
542 static void cleanup_status_page(struct drm_device
*dev
,
543 struct intel_ring_buffer
*ring
)
545 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
546 struct drm_gem_object
*obj
;
547 struct drm_i915_gem_object
*obj_priv
;
549 obj
= ring
->status_page
.obj
;
552 obj_priv
= to_intel_bo(obj
);
554 kunmap(obj_priv
->pages
[0]);
555 i915_gem_object_unpin(obj
);
556 drm_gem_object_unreference(obj
);
557 ring
->status_page
.obj
= NULL
;
559 memset(&dev_priv
->hws_map
, 0, sizeof(dev_priv
->hws_map
));
562 static int init_status_page(struct drm_device
*dev
,
563 struct intel_ring_buffer
*ring
)
565 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
566 struct drm_gem_object
*obj
;
567 struct drm_i915_gem_object
*obj_priv
;
570 obj
= i915_gem_alloc_object(dev
, 4096);
572 DRM_ERROR("Failed to allocate status page\n");
576 obj_priv
= to_intel_bo(obj
);
577 obj_priv
->agp_type
= AGP_USER_CACHED_MEMORY
;
579 ret
= i915_gem_object_pin(obj
, 4096);
584 ring
->status_page
.gfx_addr
= obj_priv
->gtt_offset
;
585 ring
->status_page
.page_addr
= kmap(obj_priv
->pages
[0]);
586 if (ring
->status_page
.page_addr
== NULL
) {
587 memset(&dev_priv
->hws_map
, 0, sizeof(dev_priv
->hws_map
));
590 ring
->status_page
.obj
= obj
;
591 memset(ring
->status_page
.page_addr
, 0, PAGE_SIZE
);
593 ring
->setup_status_page(dev
, ring
);
594 DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n",
595 ring
->name
, ring
->status_page
.gfx_addr
);
600 i915_gem_object_unpin(obj
);
602 drm_gem_object_unreference(obj
);
608 int intel_init_ring_buffer(struct drm_device
*dev
,
609 struct intel_ring_buffer
*ring
)
612 struct drm_i915_gem_object
*obj_priv
;
613 struct drm_gem_object
*obj
;
616 if (I915_NEED_GFX_HWS(dev
)) {
617 ret
= init_status_page(dev
, ring
);
622 obj
= i915_gem_alloc_object(dev
, ring
->size
);
624 DRM_ERROR("Failed to allocate ringbuffer\n");
629 ring
->gem_object
= obj
;
631 ret
= i915_gem_object_pin(obj
, ring
->alignment
);
633 drm_gem_object_unreference(obj
);
637 obj_priv
= to_intel_bo(obj
);
638 ring
->map
.size
= ring
->size
;
639 ring
->map
.offset
= dev
->agp
->base
+ obj_priv
->gtt_offset
;
644 drm_core_ioremap_wc(&ring
->map
, dev
);
645 if (ring
->map
.handle
== NULL
) {
646 DRM_ERROR("Failed to map ringbuffer.\n");
647 i915_gem_object_unpin(obj
);
648 drm_gem_object_unreference(obj
);
653 ring
->virtual_start
= ring
->map
.handle
;
654 ret
= ring
->init(dev
, ring
);
656 intel_cleanup_ring_buffer(dev
, ring
);
660 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
661 i915_kernel_lost_context(dev
);
663 ring
->head
= ring
->get_head(dev
, ring
);
664 ring
->tail
= ring
->get_tail(dev
, ring
);
665 ring
->space
= ring
->head
- (ring
->tail
+ 8);
667 ring
->space
+= ring
->size
;
669 INIT_LIST_HEAD(&ring
->active_list
);
670 INIT_LIST_HEAD(&ring
->request_list
);
673 cleanup_status_page(dev
, ring
);
677 void intel_cleanup_ring_buffer(struct drm_device
*dev
,
678 struct intel_ring_buffer
*ring
)
680 if (ring
->gem_object
== NULL
)
683 drm_core_ioremapfree(&ring
->map
, dev
);
685 i915_gem_object_unpin(ring
->gem_object
);
686 drm_gem_object_unreference(ring
->gem_object
);
687 ring
->gem_object
= NULL
;
688 cleanup_status_page(dev
, ring
);
691 int intel_wrap_ring_buffer(struct drm_device
*dev
,
692 struct intel_ring_buffer
*ring
)
696 rem
= ring
->size
- ring
->tail
;
698 if (ring
->space
< rem
) {
699 int ret
= intel_wait_ring_buffer(dev
, ring
, rem
);
704 virt
= (unsigned int *)(ring
->virtual_start
+ ring
->tail
);
712 ring
->space
= ring
->head
- 8;
717 int intel_wait_ring_buffer(struct drm_device
*dev
,
718 struct intel_ring_buffer
*ring
, int n
)
722 trace_i915_ring_wait_begin (dev
);
723 end
= jiffies
+ 3 * HZ
;
725 ring
->head
= ring
->get_head(dev
, ring
);
726 ring
->space
= ring
->head
- (ring
->tail
+ 8);
728 ring
->space
+= ring
->size
;
729 if (ring
->space
>= n
) {
730 trace_i915_ring_wait_end (dev
);
734 if (dev
->primary
->master
) {
735 struct drm_i915_master_private
*master_priv
= dev
->primary
->master
->driver_priv
;
736 if (master_priv
->sarea_priv
)
737 master_priv
->sarea_priv
->perf_boxes
|= I915_BOX_WAIT
;
741 } while (!time_after(jiffies
, end
));
742 trace_i915_ring_wait_end (dev
);
746 void intel_ring_begin(struct drm_device
*dev
,
747 struct intel_ring_buffer
*ring
, int num_dwords
)
749 int n
= 4*num_dwords
;
750 if (unlikely(ring
->tail
+ n
> ring
->size
))
751 intel_wrap_ring_buffer(dev
, ring
);
752 if (unlikely(ring
->space
< n
))
753 intel_wait_ring_buffer(dev
, ring
, n
);
758 void intel_ring_advance(struct drm_device
*dev
,
759 struct intel_ring_buffer
*ring
)
761 ring
->tail
&= ring
->size
- 1;
762 ring
->advance_ring(dev
, ring
);
765 void intel_fill_struct(struct drm_device
*dev
,
766 struct intel_ring_buffer
*ring
,
770 unsigned int *virt
= ring
->virtual_start
+ ring
->tail
;
771 BUG_ON((len
&~(4-1)) != 0);
772 intel_ring_begin(dev
, ring
, len
/4);
773 memcpy(virt
, data
, len
);
775 ring
->tail
&= ring
->size
- 1;
777 intel_ring_advance(dev
, ring
);
780 struct intel_ring_buffer render_ring
= {
781 .name
= "render ring",
788 .ring_flag
= I915_EXEC_RENDER
,
789 .size
= 32 * PAGE_SIZE
,
790 .alignment
= PAGE_SIZE
,
791 .virtual_start
= NULL
,
797 .user_irq_refcount
= 0,
799 .waiting_gem_seqno
= 0,
800 .setup_status_page
= render_setup_status_page
,
801 .init
= init_render_ring
,
802 .get_head
= render_ring_get_head
,
803 .get_tail
= render_ring_get_tail
,
804 .get_active_head
= render_ring_get_active_head
,
805 .advance_ring
= render_ring_advance_ring
,
806 .flush
= render_ring_flush
,
807 .add_request
= render_ring_add_request
,
808 .get_gem_seqno
= render_ring_get_gem_seqno
,
809 .user_irq_get
= render_ring_get_user_irq
,
810 .user_irq_put
= render_ring_put_user_irq
,
811 .dispatch_gem_execbuffer
= render_ring_dispatch_gem_execbuffer
,
812 .status_page
= {NULL
, 0, NULL
},
816 /* ring buffer for bit-stream decoder */
818 struct intel_ring_buffer bsd_ring
= {
822 .head
= BSD_RING_HEAD
,
823 .tail
= BSD_RING_TAIL
,
824 .start
= BSD_RING_START
826 .ring_flag
= I915_EXEC_BSD
,
827 .size
= 32 * PAGE_SIZE
,
828 .alignment
= PAGE_SIZE
,
829 .virtual_start
= NULL
,
835 .user_irq_refcount
= 0,
837 .waiting_gem_seqno
= 0,
838 .setup_status_page
= bsd_setup_status_page
,
839 .init
= init_bsd_ring
,
840 .get_head
= bsd_ring_get_head
,
841 .get_tail
= bsd_ring_get_tail
,
842 .get_active_head
= bsd_ring_get_active_head
,
843 .advance_ring
= bsd_ring_advance_ring
,
844 .flush
= bsd_ring_flush
,
845 .add_request
= bsd_ring_add_request
,
846 .get_gem_seqno
= bsd_ring_get_gem_seqno
,
847 .user_irq_get
= bsd_ring_get_user_irq
,
848 .user_irq_put
= bsd_ring_put_user_irq
,
849 .dispatch_gem_execbuffer
= bsd_ring_dispatch_gem_execbuffer
,
850 .status_page
= {NULL
, 0, NULL
},