drm/i915: initialization/teardown for the aliasing ppgtt
This just adds the setup and teardown code for the ppgtt PDE and the
last-level pagetables, which are fixed for the entire lifetime, at
least for the moment.
v2: Kill the stray debug printk noted by and improve the pte
definitions as suggested by Chris Wilson.
v3: Clean up the aperture stealing code as noted by Ben Widawsky.
v4: Paint the init code in a more pleasing colour as suggest by Chris
Wilson.
v5: Explain the magic numbers noticed by Ben Widawsky.
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 28740bc..03a9e49 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -258,6 +258,16 @@
u8 has_llc:1;
};
+#define I915_PPGTT_PD_ENTRIES 512
+#define I915_PPGTT_PT_ENTRIES 1024
+struct i915_hw_ppgtt {
+ unsigned num_pd_entries;
+ struct page **pt_pages;
+ uint32_t pd_offset;
+ dma_addr_t *pt_dma_addr;
+ dma_addr_t scratch_page_dma_addr;
+};
+
enum no_fbc_reason {
FBC_NO_OUTPUT, /* no outputs enabled to compress */
FBC_STOLEN_TOO_SMALL, /* not enough space to hold compressed buffers */
@@ -578,6 +588,9 @@
struct io_mapping *gtt_mapping;
int gtt_mtrr;
+ /** PPGTT used for aliasing the PPGTT with the GTT */
+ struct i915_hw_ppgtt *aliasing_ppgtt;
+
struct shrinker inactive_shrinker;
/**
@@ -973,6 +986,8 @@
#define HAS_LLC(dev) (INTEL_INFO(dev)->has_llc)
#define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws)
+#define HAS_ALIASING_PPGTT(dev) (INTEL_INFO(dev)->gen >=6)
+
#define HAS_OVERLAY(dev) (INTEL_INFO(dev)->has_overlay)
#define OVERLAY_NEEDS_PHYSICAL(dev) (INTEL_INFO(dev)->overlay_needs_physical)
@@ -1232,6 +1247,9 @@
enum i915_cache_level cache_level);
/* i915_gem_gtt.c */
+int __must_check i915_gem_init_aliasing_ppgtt(struct drm_device *dev);
+void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev);
+
void i915_gem_restore_gtt_mappings(struct drm_device *dev);
int __must_check i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj);
void i915_gem_gtt_rebind_object(struct drm_i915_gem_object *obj,