Alex Deucher pointed out an error on IRC; I'm not using radeon_irq_kms_sw_irq_get and put to manage the IRQ enablement.
I've fixed this up (as per the partial hunk below), and my bug goes away. I
will be cleaning these patches up for proper submission.
Simon
On Tuesday 31 January 2012, Simon Farnsworth <simon.farnswo...@onelan.co.uk>
wrote:
<snip>
> +int radeon_gem_wait_user_fence_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *filp)
> +{
> + struct drm_radeon_gem_wait_user_fence *args = data;
> + struct radeon_device *rdev = dev->dev_private;
> + struct drm_gem_object *gobj;
> + struct radeon_bo *robj;
> + void *buffer_data;
> + uint32_t *fence_data;
> + int r = 0;
> + long timeout;
> +
> + printk( KERN_INFO "wait_user_fence offset %lld value %d timeout
> %lld\n", args->offset, args->value, args->timeout_usec );
> +
> + gobj = drm_gem_object_lookup(dev, filp, args->handle);
> + if (gobj == NULL) {
> + return -ENOENT;
> + }
> + robj = gem_to_radeon_bo(gobj);
> +
> + if (gobj->size < args->offset) {
> + printk( KERN_INFO "Offset too large\n" );
> + r = -EINVAL;
> + goto unreference;
> + }
> +
> + r = radeon_bo_reserve(robj, true);
> + if (r) {
> + printk( KERN_INFO "Reserve fail\n" );
> + goto unreference;
> + }
> +
> + r = radeon_bo_pin(robj, RADEON_GEM_DOMAIN_GTT, NULL);
> + if (r) {
> + printk( KERN_INFO "Pin fail\n" );
> + goto unreserve;
> + }
> +
> + r = radeon_bo_kmap(robj, &buffer_data);
> + if (r) {
> + printk( KERN_INFO "kmap fail\n" );
> + goto unpin;
> + }
> +
Missing radeon_irq_kms_sw_irq_get(rdev, RADEON_RING_TYPE_GFX_INDEX); here
> + fence_data = (uint32_t*)buffer_data;
> +
> + printk( KERN_INFO "Current data value %d\n", fence_data[args->offset >>
> 2] );
> +
> + timeout =
> wait_event_interruptible_timeout(rdev->userspace_fence_wait_queue,
> + fence_data[args->offset >>
> 2] != args->value,
> +
> usecs_to_jiffies(args->timeout_usec));
And missing radeon_irq_kms_sw_irq_put(rdev, RADEON_RING_TYPE_GFX_INDEX); here.
> + if (timeout == 0)
> + r = -ETIMEDOUT;
> + else if (timeout < 0)
> + r = timeout;
> +
> + printk( KERN_INFO "wait_user_fence offset %lld value %d timeout
> %lld\n", args->offset, args->value, args->timeout_usec );
> + printk( KERN_INFO "Finished data value %d\n", fence_data[args->offset
> >> 2] );
> +
> + radeon_bo_kunmap(robj);
> +unpin:
> + radeon_bo_unpin(robj);
> +unreserve:
> + radeon_bo_unreserve(robj);
> +unreference:
> + drm_gem_object_unreference_unlocked(gobj);
> +
> + return r;
> +}
--
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/
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