1 /* i915_irq.c -- IRQ 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.
34 #define USER_INT_FLAG (1<<1)
35 #define VSYNC_PIPEB_FLAG (1<<5)
36 #define VSYNC_PIPEA_FLAG (1<<7)
38 #define MAX_NOPID ((u32)~0)
41 * Emit blits for scheduled buffer swaps.
43 * This function will be called with the HW lock held.
45 static void i915_vblank_tasklet(drm_device_t
*dev
)
47 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
48 unsigned int irqflags
;
49 struct list_head
*list
, *tmp
;
53 spin_lock_irqsave(&dev_priv
->swaps_lock
, irqflags
);
55 list_for_each_safe(list
, tmp
, &dev_priv
->vbl_swaps
.head
) {
56 drm_i915_vbl_swap_t
*vbl_swap
=
57 list_entry(list
, drm_i915_vbl_swap_t
, head
);
58 atomic_t
*counter
= vbl_swap
->pipe
? &dev
->vbl_received2
:
61 if ((atomic_read(counter
) - vbl_swap
->sequence
) <= (1<<23)) {
62 drm_drawable_info_t
*drw
;
64 spin_unlock(&dev_priv
->swaps_lock
);
66 spin_lock(&dev
->drw_lock
);
68 drw
= drm_get_drawable_info(dev
, vbl_swap
->drw_id
);
71 int i
, num_rects
= drw
->num_rects
;
72 drm_clip_rect_t
*rect
= drw
->rects
;
73 drm_i915_sarea_t
*sarea_priv
=
75 u32 cpp
= dev_priv
->cpp
;
76 u32 cmd
= (cpp
== 4) ? (XY_SRC_COPY_BLT_CMD
|
77 XY_SRC_COPY_BLT_WRITE_ALPHA
|
78 XY_SRC_COPY_BLT_WRITE_RGB
)
79 : XY_SRC_COPY_BLT_CMD
;
80 u32 pitchropcpp
= (sarea_priv
->pitch
* cpp
) |
81 (0xcc << 16) | (cpp
<< 23) |
85 i915_kernel_lost_context(dev
);
89 OUT_RING(GFX_OP_DRAWRECT_INFO
);
92 OUT_RING(sarea_priv
->width
|
93 sarea_priv
->height
<< 16);
94 OUT_RING(sarea_priv
->width
|
95 sarea_priv
->height
<< 16);
100 sarea_priv
->ctxOwner
= DRM_KERNEL_CONTEXT
;
102 for (i
= 0; i
< num_rects
; i
++, rect
++) {
106 OUT_RING(pitchropcpp
);
107 OUT_RING((rect
->y1
<< 16) | rect
->x1
);
108 OUT_RING((rect
->y2
<< 16) | rect
->x2
);
109 OUT_RING(sarea_priv
->front_offset
);
110 OUT_RING((rect
->y1
<< 16) | rect
->x1
);
111 OUT_RING(pitchropcpp
& 0xffff);
112 OUT_RING(sarea_priv
->back_offset
);
118 spin_unlock(&dev
->drw_lock
);
120 spin_lock(&dev_priv
->swaps_lock
);
124 drm_free(vbl_swap
, sizeof(*vbl_swap
), DRM_MEM_DRIVER
);
126 dev_priv
->swaps_pending
--;
130 spin_unlock_irqrestore(&dev_priv
->swaps_lock
, irqflags
);
133 irqreturn_t
i915_driver_irq_handler(DRM_IRQ_ARGS
)
135 drm_device_t
*dev
= (drm_device_t
*) arg
;
136 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
139 temp
= I915_READ16(I915REG_INT_IDENTITY_R
);
141 temp
&= (USER_INT_FLAG
| VSYNC_PIPEA_FLAG
| VSYNC_PIPEB_FLAG
);
143 DRM_DEBUG("%s flag=%08x\n", __FUNCTION__
, temp
);
148 I915_WRITE16(I915REG_INT_IDENTITY_R
, temp
);
150 dev_priv
->sarea_priv
->last_dispatch
= READ_BREADCRUMB(dev_priv
);
152 if (temp
& USER_INT_FLAG
)
153 DRM_WAKEUP(&dev_priv
->irq_queue
);
155 if (temp
& (VSYNC_PIPEA_FLAG
| VSYNC_PIPEB_FLAG
)) {
156 if ((dev_priv
->vblank_pipe
&
157 (DRM_I915_VBLANK_PIPE_A
| DRM_I915_VBLANK_PIPE_B
))
158 == (DRM_I915_VBLANK_PIPE_A
| DRM_I915_VBLANK_PIPE_B
)) {
159 if (temp
& VSYNC_PIPEA_FLAG
)
160 atomic_inc(&dev
->vbl_received
);
161 if (temp
& VSYNC_PIPEB_FLAG
)
162 atomic_inc(&dev
->vbl_received2
);
164 atomic_inc(&dev
->vbl_received
);
166 DRM_WAKEUP(&dev
->vbl_queue
);
167 drm_vbl_send_signals(dev
);
169 drm_locked_tasklet(dev
, i915_vblank_tasklet
);
175 static int i915_emit_irq(drm_device_t
* dev
)
177 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
180 i915_kernel_lost_context(dev
);
182 DRM_DEBUG("%s\n", __FUNCTION__
);
184 dev_priv
->sarea_priv
->last_enqueue
= ++dev_priv
->counter
;
186 if (dev_priv
->counter
> 0x7FFFFFFFUL
)
187 dev_priv
->sarea_priv
->last_enqueue
= dev_priv
->counter
= 1;
190 OUT_RING(CMD_STORE_DWORD_IDX
);
192 OUT_RING(dev_priv
->counter
);
195 OUT_RING(GFX_OP_USER_INTERRUPT
);
198 return dev_priv
->counter
;
201 static int i915_wait_irq(drm_device_t
* dev
, int irq_nr
)
203 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
206 DRM_DEBUG("%s irq_nr=%d breadcrumb=%d\n", __FUNCTION__
, irq_nr
,
207 READ_BREADCRUMB(dev_priv
));
209 if (READ_BREADCRUMB(dev_priv
) >= irq_nr
)
212 dev_priv
->sarea_priv
->perf_boxes
|= I915_BOX_WAIT
;
214 DRM_WAIT_ON(ret
, dev_priv
->irq_queue
, 3 * DRM_HZ
,
215 READ_BREADCRUMB(dev_priv
) >= irq_nr
);
217 if (ret
== DRM_ERR(EBUSY
)) {
218 DRM_ERROR("%s: EBUSY -- rec: %d emitted: %d\n",
220 READ_BREADCRUMB(dev_priv
), (int)dev_priv
->counter
);
223 dev_priv
->sarea_priv
->last_dispatch
= READ_BREADCRUMB(dev_priv
);
227 static int i915_driver_vblank_do_wait(drm_device_t
*dev
, unsigned int *sequence
,
230 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
231 unsigned int cur_vblank
;
235 DRM_ERROR("%s called with no initialization\n", __FUNCTION__
);
236 return DRM_ERR(EINVAL
);
239 DRM_WAIT_ON(ret
, dev
->vbl_queue
, 3 * DRM_HZ
,
240 (((cur_vblank
= atomic_read(counter
))
241 - *sequence
) <= (1<<23)));
243 *sequence
= cur_vblank
;
249 int i915_driver_vblank_wait(drm_device_t
*dev
, unsigned int *sequence
)
251 return i915_driver_vblank_do_wait(dev
, sequence
, &dev
->vbl_received
);
254 int i915_driver_vblank_wait2(drm_device_t
*dev
, unsigned int *sequence
)
256 return i915_driver_vblank_do_wait(dev
, sequence
, &dev
->vbl_received2
);
259 /* Needs the lock as it touches the ring.
261 int i915_irq_emit(DRM_IOCTL_ARGS
)
264 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
265 drm_i915_irq_emit_t emit
;
268 LOCK_TEST_WITH_RETURN(dev
, filp
);
271 DRM_ERROR("%s called with no initialization\n", __FUNCTION__
);
272 return DRM_ERR(EINVAL
);
275 DRM_COPY_FROM_USER_IOCTL(emit
, (drm_i915_irq_emit_t __user
*) data
,
278 result
= i915_emit_irq(dev
);
280 if (DRM_COPY_TO_USER(emit
.irq_seq
, &result
, sizeof(int))) {
281 DRM_ERROR("copy_to_user\n");
282 return DRM_ERR(EFAULT
);
288 /* Doesn't need the hardware lock.
290 int i915_irq_wait(DRM_IOCTL_ARGS
)
293 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
294 drm_i915_irq_wait_t irqwait
;
297 DRM_ERROR("%s called with no initialization\n", __FUNCTION__
);
298 return DRM_ERR(EINVAL
);
301 DRM_COPY_FROM_USER_IOCTL(irqwait
, (drm_i915_irq_wait_t __user
*) data
,
304 return i915_wait_irq(dev
, irqwait
.irq_seq
);
307 static int i915_enable_interrupt (drm_device_t
*dev
)
309 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
313 if (dev_priv
->vblank_pipe
& DRM_I915_VBLANK_PIPE_A
)
314 flag
|= VSYNC_PIPEA_FLAG
;
315 if (dev_priv
->vblank_pipe
& DRM_I915_VBLANK_PIPE_B
)
316 flag
|= VSYNC_PIPEB_FLAG
;
317 if (dev_priv
->vblank_pipe
& ~(DRM_I915_VBLANK_PIPE_A
|DRM_I915_VBLANK_PIPE_B
)) {
318 DRM_ERROR("%s called with invalid pipe 0x%x\n",
319 __FUNCTION__
, dev_priv
->vblank_pipe
);
320 return DRM_ERR(EINVAL
);
322 I915_WRITE16(I915REG_INT_ENABLE_R
, USER_INT_FLAG
| flag
);
326 /* Set the vblank monitor pipe
328 int i915_vblank_pipe_set(DRM_IOCTL_ARGS
)
331 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
332 drm_i915_vblank_pipe_t pipe
;
335 DRM_ERROR("%s called with no initialization\n", __FUNCTION__
);
336 return DRM_ERR(EINVAL
);
339 DRM_COPY_FROM_USER_IOCTL(pipe
, (drm_i915_vblank_pipe_t __user
*) data
,
342 dev_priv
->vblank_pipe
= pipe
.pipe
;
343 return i915_enable_interrupt (dev
);
346 int i915_vblank_pipe_get(DRM_IOCTL_ARGS
)
349 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
350 drm_i915_vblank_pipe_t pipe
;
354 DRM_ERROR("%s called with no initialization\n", __FUNCTION__
);
355 return DRM_ERR(EINVAL
);
358 flag
= I915_READ(I915REG_INT_ENABLE_R
);
360 if (flag
& VSYNC_PIPEA_FLAG
)
361 pipe
.pipe
|= DRM_I915_VBLANK_PIPE_A
;
362 if (flag
& VSYNC_PIPEB_FLAG
)
363 pipe
.pipe
|= DRM_I915_VBLANK_PIPE_B
;
364 DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_pipe_t __user
*) data
, pipe
,
370 * Schedule buffer swap at given vertical blank.
372 int i915_vblank_swap(DRM_IOCTL_ARGS
)
375 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
376 drm_i915_vblank_swap_t swap
;
377 drm_i915_vbl_swap_t
*vbl_swap
;
378 unsigned int pipe
, seqtype
, irqflags
, curseq
;
379 struct list_head
*list
;
382 DRM_ERROR("%s called with no initialization\n", __func__
);
383 return DRM_ERR(EINVAL
);
386 if (dev_priv
->sarea_priv
->rotation
) {
387 DRM_DEBUG("Rotation not supported\n");
388 return DRM_ERR(EINVAL
);
391 if (dev_priv
->swaps_pending
>= 100) {
392 DRM_DEBUG("Too many swaps queued\n");
393 return DRM_ERR(EBUSY
);
396 DRM_COPY_FROM_USER_IOCTL(swap
, (drm_i915_vblank_swap_t __user
*) data
,
399 if (swap
.seqtype
& ~(_DRM_VBLANK_RELATIVE
| _DRM_VBLANK_ABSOLUTE
|
400 _DRM_VBLANK_SECONDARY
)) {
401 DRM_ERROR("Invalid sequence type 0x%x\n", swap
.seqtype
);
402 return DRM_ERR(EINVAL
);
405 pipe
= (swap
.seqtype
& _DRM_VBLANK_SECONDARY
) ? 1 : 0;
407 seqtype
= swap
.seqtype
& (_DRM_VBLANK_RELATIVE
| _DRM_VBLANK_ABSOLUTE
);
409 if (seqtype
== _DRM_VBLANK_RELATIVE
&& swap
.sequence
== 0) {
410 DRM_DEBUG("Not scheduling swap for current sequence\n");
411 return DRM_ERR(EINVAL
);
414 if (!(dev_priv
->vblank_pipe
& (1 << pipe
))) {
415 DRM_ERROR("Invalid pipe %d\n", pipe
);
416 return DRM_ERR(EINVAL
);
419 spin_lock_irqsave(&dev
->drw_lock
, irqflags
);
421 if (!drm_get_drawable_info(dev
, swap
.drawable
)) {
422 spin_unlock_irqrestore(&dev
->drw_lock
, irqflags
);
423 DRM_ERROR("Invalid drawable ID %d\n", swap
.drawable
);
424 return DRM_ERR(EINVAL
);
427 spin_unlock_irqrestore(&dev
->drw_lock
, irqflags
);
429 curseq
= atomic_read(pipe
? &dev
->vbl_received2
: &dev
->vbl_received
);
431 spin_lock_irqsave(&dev_priv
->swaps_lock
, irqflags
);
434 case _DRM_VBLANK_RELATIVE
:
435 swap
.sequence
+= curseq
;
437 case _DRM_VBLANK_ABSOLUTE
:
438 if ((curseq
- swap
.sequence
) > (1<<23)) {
439 spin_unlock_irqrestore(&dev_priv
->swaps_lock
, irqflags
);
440 DRM_DEBUG("Missed target sequence\n");
441 return DRM_ERR(EINVAL
);
446 list_for_each(list
, &dev_priv
->vbl_swaps
.head
) {
447 vbl_swap
= list_entry(list
, drm_i915_vbl_swap_t
, head
);
449 if (vbl_swap
->drw_id
== swap
.drawable
&&
450 vbl_swap
->pipe
== pipe
&&
451 vbl_swap
->sequence
== swap
.sequence
) {
452 spin_unlock_irqrestore(&dev_priv
->swaps_lock
, irqflags
);
453 DRM_DEBUG("Already scheduled\n");
458 spin_unlock_irqrestore(&dev_priv
->swaps_lock
, irqflags
);
460 vbl_swap
= drm_calloc(1, sizeof(vbl_swap
), DRM_MEM_DRIVER
);
463 DRM_ERROR("Failed to allocate memory to queue swap\n");
464 return DRM_ERR(ENOMEM
);
469 vbl_swap
->drw_id
= swap
.drawable
;
470 vbl_swap
->pipe
= pipe
;
471 vbl_swap
->sequence
= swap
.sequence
;
473 spin_lock_irqsave(&dev_priv
->swaps_lock
, irqflags
);
475 list_add_tail((struct list_head
*)vbl_swap
, &dev_priv
->vbl_swaps
.head
);
476 dev_priv
->swaps_pending
++;
478 spin_unlock_irqrestore(&dev_priv
->swaps_lock
, irqflags
);
480 DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_swap_t __user
*) data
, swap
,
488 void i915_driver_irq_preinstall(drm_device_t
* dev
)
490 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
492 I915_WRITE16(I915REG_HWSTAM
, 0xfffe);
493 I915_WRITE16(I915REG_INT_MASK_R
, 0x0);
494 I915_WRITE16(I915REG_INT_ENABLE_R
, 0x0);
497 void i915_driver_irq_postinstall(drm_device_t
* dev
)
499 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
501 dev_priv
->swaps_lock
= SPIN_LOCK_UNLOCKED
;
502 INIT_LIST_HEAD(&dev_priv
->vbl_swaps
.head
);
503 dev_priv
->swaps_pending
= 0;
505 i915_enable_interrupt(dev
);
506 DRM_INIT_WAITQUEUE(&dev_priv
->irq_queue
);
509 void i915_driver_irq_uninstall(drm_device_t
* dev
)
511 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
517 I915_WRITE16(I915REG_HWSTAM
, 0xffff);
518 I915_WRITE16(I915REG_INT_MASK_R
, 0xffff);
519 I915_WRITE16(I915REG_INT_ENABLE_R
, 0x0);
521 temp
= I915_READ16(I915REG_INT_IDENTITY_R
);
522 I915_WRITE16(I915REG_INT_IDENTITY_R
, temp
);