1. 04 Nov, 2019 11 commits
  2. 02 Nov, 2019 3 commits
  3. 01 Nov, 2019 25 commits
  4. 31 Oct, 2019 1 commit
    • Matthew Auld's avatar
      drm/i915/lmem: add the fake lmem region · 16292243
      Matthew Auld authored
      Intended for upstream testing so that we can still exercise the LMEM
      plumbing and !i915_ggtt_has_aperture paths. Smoke tested on Skull Canyon
      device. This works by allocating an intel_memory_region for a reserved
      portion of system memory, which we treat like LMEM. For the LMEMBAR we
      steal the aperture and 1:1 it map to the stolen region.
      
      To enable simply set the i915 modparam fake_lmem_start= on the kernel
      cmdline with the start of reserved region(see memmap=). The size of the
      region we can use is determined by the size of the mappable aperture, so
      the size of reserved region should be >= mappable_end. For now we only
      enable for the selftests. Depends on CONFIG_DRM_I915_UNSTABLE being
      enabled.
      
      eg. memmap=2G$16G i915.fake_lmem_start=0x400000000
      
      v2: make fake_lmem_start an i915 modparam
      Signed-off-by: default avatarMatthew Auld <matthew.auld@intel.com>
      Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
      Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
      Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
      Cc: Chris Wilson <chris@chris-wilson.co.uk>
      Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Link: https://patchwork.freedesktop.org/patch/msgid/20191030173320.8850-1-matthew.auld@intel.com
      16292243