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author=?utf-8?q?Michel_D=C3=A4nzer?= <michel@tungstengraphics.com>2006-10-24 23:38:54 +1000
committerairlied <airlied@linux.ie>2006-12-07 15:53:30 +1100
commit541f29aad766b6c7b911a7d900d952744369bf53 (patch)
tree5ce5aa51d47c518146b0f13c2a58d643b58d58ba
parenta6b54f3f5050c0cbc0c35dd48064846c6302706b (diff)
drm: DRM_I915_VBLANK_SWAP ioctl: Take drm_vblank_seq_type_t instead
of pipe number. Handle relative as well as absolute target sequence numbers. Return error if target sequence has already passed, so userspace can deal with this situation as it sees fit. On success, return the sequence number of the vertical blank when the buffer swap is expected to take place. Also add DRM_IOCTL_I915_VBLANK_SWAP definition for userspace code that may want to use ioctl() instead of drmCommandWriteRead(). Signed-off-by: Dave Airlie <airlied@linux.ie>
-rw-r--r--drivers/char/drm/i915_drm.h3
-rw-r--r--drivers/char/drm/i915_irq.c43
2 files changed, 40 insertions, 6 deletions
diff --git a/drivers/char/drm/i915_drm.h b/drivers/char/drm/i915_drm.h
index 8926beb5a61f..4ce3d16cf065 100644
--- a/drivers/char/drm/i915_drm.h
+++ b/drivers/char/drm/i915_drm.h
@@ -149,6 +149,7 @@ typedef struct _drm_i915_sarea {
#define DRM_IOCTL_I915_DESTROY_HEAP DRM_IOW( DRM_COMMAND_BASE + DRM_I915_DESTROY_HEAP, drm_i915_mem_destroy_heap_t)
#define DRM_IOCTL_I915_SET_VBLANK_PIPE DRM_IOW( DRM_COMMAND_BASE + DRM_I915_SET_VBLANK_PIPE, drm_i915_vblank_pipe_t)
#define DRM_IOCTL_I915_GET_VBLANK_PIPE DRM_IOR( DRM_COMMAND_BASE + DRM_I915_GET_VBLANK_PIPE, drm_i915_vblank_pipe_t)
+#define DRM_IOCTL_I915_VBLANK_SWAP DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_VBLANK_SWAP, drm_i915_vblank_swap_t)
/* Allow drivers to submit batchbuffers directly to hardware, relying
* on the security mechanisms provided by hardware.
@@ -248,7 +249,7 @@ typedef struct drm_i915_vblank_pipe {
*/
typedef struct drm_i915_vblank_swap {
drm_drawable_t drawable;
- unsigned int pipe;
+ drm_vblank_seq_type_t seqtype;
unsigned int sequence;
} drm_i915_vblank_swap_t;
diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index a93f1f37ec6a..d56455666312 100644
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -375,7 +375,7 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_vblank_swap_t swap;
drm_i915_vbl_swap_t *vbl_swap;
- unsigned int irqflags;
+ unsigned int pipe, seqtype, irqflags, curseq;
struct list_head *list;
if (!dev_priv) {
@@ -396,8 +396,23 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
DRM_COPY_FROM_USER_IOCTL(swap, (drm_i915_vblank_swap_t __user *) data,
sizeof(swap));
- if (swap.pipe > 1 || !(dev_priv->vblank_pipe & (1 << swap.pipe))) {
- DRM_ERROR("Invalid pipe %d\n", swap.pipe);
+ if (swap.seqtype & ~(_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE |
+ _DRM_VBLANK_SECONDARY)) {
+ DRM_ERROR("Invalid sequence type 0x%x\n", swap.seqtype);
+ return DRM_ERR(EINVAL);
+ }
+
+ pipe = (swap.seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0;
+
+ seqtype = swap.seqtype & (_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE);
+
+ if (seqtype == _DRM_VBLANK_RELATIVE && swap.sequence == 0) {
+ DRM_DEBUG("Not scheduling swap for current sequence\n");
+ return DRM_ERR(EINVAL);
+ }
+
+ if (!(dev_priv->vblank_pipe & (1 << pipe))) {
+ DRM_ERROR("Invalid pipe %d\n", pipe);
return DRM_ERR(EINVAL);
}
@@ -411,13 +426,28 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ curseq = atomic_read(pipe ? &dev->vbl_received2 : &dev->vbl_received);
+
spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
+ switch (seqtype) {
+ case _DRM_VBLANK_RELATIVE:
+ swap.sequence += curseq;
+ break;
+ case _DRM_VBLANK_ABSOLUTE:
+ if ((curseq - swap.sequence) > (1<<23)) {
+ spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
+ DRM_DEBUG("Missed target sequence\n");
+ return DRM_ERR(EINVAL);
+ }
+ break;
+ }
+
list_for_each(list, &dev_priv->vbl_swaps.head) {
vbl_swap = list_entry(list, drm_i915_vbl_swap_t, head);
if (vbl_swap->drw_id == swap.drawable &&
- vbl_swap->pipe == swap.pipe &&
+ vbl_swap->pipe == pipe &&
vbl_swap->sequence == swap.sequence) {
spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
DRM_DEBUG("Already scheduled\n");
@@ -437,7 +467,7 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
DRM_DEBUG("\n");
vbl_swap->drw_id = swap.drawable;
- vbl_swap->pipe = swap.pipe;
+ vbl_swap->pipe = pipe;
vbl_swap->sequence = swap.sequence;
spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
@@ -447,6 +477,9 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
+ DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_swap_t __user *) data, swap,
+ sizeof(swap));
+
return 0;
}