path: root/drivers/gpu/drm/i915/i915_drv.h
diff options
authorThomas Hellström <thomas.hellstrom@linux.intel.com>2021-12-21 21:00:50 +0100
committerThomas Hellström <thomas.hellstrom@linux.intel.com>2021-12-22 08:52:57 +0100
commitc2ea703dcafccf18d7d77d8b68fb08c2d9842b7a (patch)
treeb3f56f8cc2e3d3e92b66e237eb5890961a399003 /drivers/gpu/drm/i915/i915_drv.h
parentdrm/i915: Break out the i915_deps utility (diff)
drm/i915: Require the vm mutex for i915_vma_bind()
Protect updates of struct i915_vma flags and async binding / unbinding with the vm::mutex. This means that i915_vma_bind() needs to assert vm::mutex held. In order to make that possible drop the caching of kmap_atomic() maps around i915_vma_bind(). An alternative would be to use kmap_local() but since we block cpu unplugging during sleeps inside kmap_local() sections this may have unwanted side-effects. Particularly since we might wait for gpu while holding the vm mutex. This change may theoretically increase execbuf cpu-usage on snb, but at least on non-highmem systems that increase should be very small. Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211221200050.436316-5-thomas.hellstrom@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
0 files changed, 0 insertions, 0 deletions