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| author |   Ben Skeggs <bskeggs@redhat.com> | 2014-08-10 04:10:20 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2014-08-10 05:13:02 +1000 |
| commit | 79ca27706a034b683196c85f5c6901b78e5ab8f0 (patch) | |
| tree | c06ff32b983e4456b3af679288dad97bfe79cfe9 /drivers/gpu/drm/nouveau/nvif/unpack.h | |
| parent | drm/nouveau/core: move handle-based object apis to handle.c (diff) | |
| download | linux-dev-79ca27706a034b683196c85f5c6901b78e5ab8f0.tar.xz linux-dev-79ca27706a034b683196c85f5c6901b78e5ab8f0.zip | |
drm/nouveau/core: rework event interface
This is a lot of prep-work for being able to send event notifications
back to userspace. Events now contain data, rather than a "something
just happened" signal.
Handler data is now embedded into a containing structure, rather than
being kmalloc()'d, and can optionally have the notify routine handled
in a workqueue.
Various races between suspend/unload with display HPD/DP IRQ handlers
automagically solved as a result.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvif/unpack.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvif/unpack.h b/drivers/gpu/drm/nouveau/nvif/unpack.h new file mode 100644 index 000000000000..5933188b4a77 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/unpack.h @@ -0,0 +1,24 @@ +#ifndef __NVIF_UNPACK_H__ +#define __NVIF_UNPACK_H__ + +#define nvif_unvers(d) ({ \ + ret = (size == sizeof(d)) ? 0 : -ENOSYS; \ + (ret == 0); \ +}) + +#define nvif_unpack(d,vl,vh,m) ({ \ + if ((vl) == 0 || ret == -ENOSYS) { \ + int _size = sizeof(d); \ + if (_size <= size && (d).version >= (vl) && \ + (d).version <= (vh)) { \ + data = (u8 *)data + _size; \ + size = size - _size; \ + ret = ((m) || !size) ? 0 : -E2BIG; \ + } else { \ + ret = -ENOSYS; \ + } \ + } \ + (ret == 0); \ +}) + +#endif |