From d5a0f107511e128658e2d5e15bd7e6215c507f29 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Michel=20D=C3=A4nzer?= Date: Wed, 30 Aug 2006 19:33:28 +0200 Subject: 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(). --- shared-core/i915_drm.h | 3 ++- shared-core/i915_irq.c | 43 ++++++++++++++++++++++++++++++++++++++----- 2 files changed, 40 insertions(+), 6 deletions(-) diff --git a/shared-core/i915_drm.h b/shared-core/i915_drm.h index 7e4ba13d..3a39d531 100644 --- a/shared-core/i915_drm.h +++ b/shared-core/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 @@ -249,7 +250,7 @@ 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/shared-core/i915_irq.c b/shared-core/i915_irq.c index 39d8c386..6f00febc 100644 --- a/shared-core/i915_irq.c +++ b/shared-core/i915_irq.c @@ -378,7 +378,7 @@ 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) { @@ -399,8 +399,23 @@ 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); } @@ -414,13 +429,28 @@ 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"); @@ -440,7 +470,7 @@ 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); @@ -450,6 +480,9 @@ 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; } -- cgit v1.2.3