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drm/i915: make PDE|PTE platform specific

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Nothing outside of i915_gem_gtt.c and more specifically, the relevant
gen specific init function should need to know about number of PDEs, or
PTEs per PD. Exposing this will only lead to circumventing using the
upcoming VM abstraction.

To accomplish this, move the defines into the .c file, rename the PDE
define to be GEN6, and make the PTE count less of a magic number.

The remaining code in the global gtt setup is a bit messy, but an
upcoming patch will clean that one up.

v2: Don't hardcode number of PDEs (Daniel + Jesse)
Reworded commit message to reflect change.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-06-27 16:30:04 -07:00 • committed by Daniel Vetter
parent 26b7c22465
commit 6670a5a5c7
2 changed files with 6 additions and 5 deletions
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2
drivers/gpu/drm/i915/i915_drv.h
View file

@ -486,8 +486,6 @@ struct i915_gtt {
};
#define gtt_total_entries(gtt) ((gtt).total >> PAGE_SHIFT)
#define I915_PPGTT_PD_ENTRIES 512
#define I915_PPGTT_PT_ENTRIES 1024
struct i915_hw_ppgtt {
struct drm_device *dev;
unsigned num_pd_entries;

9
drivers/gpu/drm/i915/i915_gem_gtt.c
View file

@ -28,6 +28,9 @@
#include "i915_trace.h"
#include "intel_drv.h"
#define GEN6_PPGTT_PD_ENTRIES 512
#define I915_PPGTT_PT_ENTRIES (PAGE_SIZE / sizeof(gen6_gtt_pte_t))
/* PPGTT stuff */
#define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0))
@ -278,7 +281,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
} else {
ppgtt->pte_encode = gen6_pte_encode;
}
ppgtt->num_pd_entries = I915_PPGTT_PD_ENTRIES;
ppgtt->num_pd_entries = GEN6_PPGTT_PD_ENTRIES;
ppgtt->enable = gen6_ppgtt_enable;
ppgtt->clear_range = gen6_ppgtt_clear_range;
ppgtt->insert_entries = gen6_ppgtt_insert_entries;
@ -688,7 +691,7 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
if (INTEL_INFO(dev)->gen <= 7) {
/* PPGTT pdes are stolen from global gtt ptes, so shrink the
* aperture accordingly when using aliasing ppgtt. */
gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE;
gtt_size -= GEN6_PPGTT_PD_ENTRIES * PAGE_SIZE;
}
i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size);
@ -699,7 +702,7 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
DRM_ERROR("Aliased PPGTT setup failed %d\n", ret);
drm_mm_takedown(&dev_priv->mm.gtt_space);
gtt_size += I915_PPGTT_PD_ENTRIES*PAGE_SIZE;
gtt_size += GEN6_PPGTT_PD_ENTRIES * PAGE_SIZE;
}
i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size);
}