diff options
| author | Michel Thierry <michel.thierry@intel.com> | 2015-08-03 09:52:01 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-08-14 18:16:20 +0200 |
| commit | 81ba8aefd03803a8aec3395d18f7b1dda5942105 (patch) | |
| tree | f61a2d6f5f74c1bbfffbdcbdbe3bd1af0f6cbfda /drivers/gpu/drm/i915/i915_gem_gtt.c | |
| parent | 4c06ec8d13d2b0e57479bb135e49afd56ebe9275 (diff) | |
drm/i915/gen8: Add PML4 structure
Introduces the Page Map Level 4 (PML4), ie. the new top level structure
of the page tables.
To facilitate testing, 48b mode will be available on Broadwell and
GEN9+, when i915.enable_ppgtt = 3.
v2: Remove unnecessary CONFIG_X86_64 checks, ppgtt code is already
32/64-bit safe (Chris).
v3: Add goto free_scratch in temp 48-bit mode init code (Akash).
v4: kfree the pdp until the 4lvl alloc/free patch (Akash).
v5: Postpone 48-bit code in sanitize_enable_ppgtt (Akash).
v6: Keep _insert_pte_entries changes outside this patch (Akash).
Cc: Akash Goel <akash.goel@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Akash Goel <akash.goel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 72f4777f06fe..da7863b5c22b 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1105,14 +1105,6 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) return ret; ppgtt->base.start = 0; - ppgtt->base.total = 1ULL << 32; - if (IS_ENABLED(CONFIG_X86_32)) - /* While we have a proliferation of size_t variables - * we cannot represent the full ppgtt size on 32bit, - * so limit it to the same size as the GGTT (currently - * 2GiB). - */ - ppgtt->base.total = to_i915(ppgtt->base.dev)->gtt.base.total; ppgtt->base.cleanup = gen8_ppgtt_cleanup; ppgtt->base.allocate_va_range = gen8_alloc_va_range; ppgtt->base.insert_entries = gen8_ppgtt_insert_entries; @@ -1122,10 +1114,25 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->switch_mm = gen8_mm_switch; - ret = __pdp_init(false, &ppgtt->pdp); + if (!USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) { + ret = __pdp_init(false, &ppgtt->pdp); - if (ret) + if (ret) + goto free_scratch; + + ppgtt->base.total = 1ULL << 32; + if (IS_ENABLED(CONFIG_X86_32)) + /* While we have a proliferation of size_t variables + * we cannot represent the full ppgtt size on 32bit, + * so limit it to the same size as the GGTT (currently + * 2GiB). + */ + ppgtt->base.total = to_i915(ppgtt->base.dev)->gtt.base.total; + } else { + ppgtt->base.total = 1ULL << 48; + ret = -EPERM; /* Not yet implemented */ goto free_scratch; + } return 0; |