drm/i915: Add intel implementation of the pageflip ioctl
Acked-by: Jakob Bornecrantz <jakob@vmware.com>
Acked-by: Thomas Hellström <thomas@shipmail.org>
Review-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jesse "Orange Smoothie" Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 481c0ab..214fb18 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2771,6 +2771,22 @@
old_write_domain);
}
+void
+i915_gem_object_flush_write_domain(struct drm_gem_object *obj)
+{
+ switch (obj->write_domain) {
+ case I915_GEM_DOMAIN_GTT:
+ i915_gem_object_flush_gtt_write_domain(obj);
+ break;
+ case I915_GEM_DOMAIN_CPU:
+ i915_gem_object_flush_cpu_write_domain(obj);
+ break;
+ default:
+ i915_gem_object_flush_gpu_write_domain(obj);
+ break;
+ }
+}
+
/**
* Moves a single object to the GTT read, and possibly write domain.
*
@@ -3536,6 +3552,41 @@
return 0;
}
+static int
+i915_gem_wait_for_pending_flip(struct drm_device *dev,
+ struct drm_gem_object **object_list,
+ int count)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ struct drm_i915_gem_object *obj_priv;
+ DEFINE_WAIT(wait);
+ int i, ret = 0;
+
+ for (;;) {
+ prepare_to_wait(&dev_priv->pending_flip_queue,
+ &wait, TASK_INTERRUPTIBLE);
+ for (i = 0; i < count; i++) {
+ obj_priv = object_list[i]->driver_private;
+ if (atomic_read(&obj_priv->pending_flip) > 0)
+ break;
+ }
+ if (i == count)
+ break;
+
+ if (!signal_pending(current)) {
+ mutex_unlock(&dev->struct_mutex);
+ schedule();
+ mutex_lock(&dev->struct_mutex);
+ continue;
+ }
+ ret = -ERESTARTSYS;
+ break;
+ }
+ finish_wait(&dev_priv->pending_flip_queue, &wait);
+
+ return ret;
+}
+
int
i915_gem_execbuffer(struct drm_device *dev, void *data,
struct drm_file *file_priv)
@@ -3551,7 +3602,7 @@
int ret, ret2, i, pinned = 0;
uint64_t exec_offset;
uint32_t seqno, flush_domains, reloc_index;
- int pin_tries;
+ int pin_tries, flips;
#if WATCH_EXEC
DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
@@ -3623,6 +3674,7 @@
}
/* Look up object handles */
+ flips = 0;
for (i = 0; i < args->buffer_count; i++) {
object_list[i] = drm_gem_object_lookup(dev, file_priv,
exec_list[i].handle);
@@ -3641,6 +3693,14 @@
goto err;
}
obj_priv->in_execbuffer = true;
+ flips += atomic_read(&obj_priv->pending_flip);
+ }
+
+ if (flips > 0) {
+ ret = i915_gem_wait_for_pending_flip(dev, object_list,
+ args->buffer_count);
+ if (ret)
+ goto err;
}
/* Pin and relocate */
@@ -4625,8 +4685,8 @@
for (i = 0; i < 8; i++)
I915_WRITE(FENCE_REG_945_8 + (i * 4), 0);
}
-
i915_gem_detect_bit_6_swizzle(dev);
+ init_waitqueue_head(&dev_priv->pending_flip_queue);
}
/*