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drm/i915: Move GSM mapping into dev_priv 

This removes an unused field from the AGP structure and moves it into
the dev_priv structure (with a slightly better name). This builds upon
the kill-agp series already merged.

GSM is a well defined term in the bspec:
GSM: Graphics Stolen Memory

GTT stolen space is defined for storage of the GFX GTT entries in
physical memory. IA can not access GSM directly , it can only access via
GTTMMADR. GT can access GSM directly or through GTTMMADR.

This is not the entire stolen space.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2012-12-18 10:31:26 -08:00 committed by Daniel Vetter
parent d7e5008f7c
commit 06e5598fce
4 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/char/agp/intel-gtt.c
View File

@ -602,7 +602,6 @@ static int intel_gtt_init(void)
iounmap(intel_private.registers);
return -ENOMEM;
}
intel_private.base.gtt = intel_private.gtt;
global_cache_flush(); /* FIXME: ? */

3
drivers/gpu/drm/i915/i915_drv.h
View File

@ -800,6 +800,9 @@ typedef struct drm_i915_private {
unsigned long gtt_end;
unsigned long stolen_base; /* limited to low memory (32-bit) */
/** "Graphics Stolen Memory" holds the global PTEs */
uint32_t __iomem *gsm;
struct io_mapping *gtt_mapping;
phys_addr_t gtt_base_addr;
int gtt_mtrr;

14
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -290,7 +290,7 @@ void i915_gem_init_ppgtt(struct drm_device *dev)
return;
pd_addr = dev_priv->mm.gtt->gtt + ppgtt->pd_offset/sizeof(gtt_pte_t);
pd_addr = dev_priv->mm.gsm + ppgtt->pd_offset/sizeof(gtt_pte_t);
for (i = 0; i < ppgtt->num_pd_entries; i++) {
dma_addr_t pt_addr;
@ -367,7 +367,7 @@ static void i915_ggtt_clear_range(struct drm_device *dev,
{
struct drm_i915_private *dev_priv = dev->dev_private;
gtt_pte_t scratch_pte;
gtt_pte_t __iomem *gtt_base = dev_priv->mm.gtt->gtt + first_entry;
gtt_pte_t __iomem *gtt_base = (gtt_pte_t __iomem *) dev_priv->mm.gsm + first_entry;
const int max_entries = dev_priv->mm.gtt->gtt_total_entries - first_entry;
int i;
@ -432,7 +432,7 @@ static void gen6_ggtt_bind_object(struct drm_i915_gem_object *obj,
struct scatterlist *sg = st->sgl;
const int first_entry = obj->gtt_space->start >> PAGE_SHIFT;
const int max_entries = dev_priv->mm.gtt->gtt_total_entries - first_entry;
gtt_pte_t __iomem *gtt_entries = dev_priv->mm.gtt->gtt + first_entry;
gtt_pte_t __iomem *gtt_entries = dev_priv->mm.gsm + first_entry;
int unused, i = 0;
unsigned int len, m = 0;
dma_addr_t addr;
@ -747,9 +747,9 @@ int i915_gem_gtt_init(struct drm_device *dev)
goto err_out;
}
dev_priv->mm.gtt->gtt = ioremap_wc(gtt_bus_addr,
dev_priv->mm.gtt->gtt_total_entries * sizeof(gtt_pte_t));
if (!dev_priv->mm.gtt->gtt) {
dev_priv->mm.gsm = ioremap_wc(gtt_bus_addr,
dev_priv->mm.gtt->gtt_total_entries * sizeof(gtt_pte_t));
if (!dev_priv->mm.gsm) {
DRM_ERROR("Failed to map the gtt page table\n");
teardown_scratch_page(dev);
ret = -ENOMEM;
@ -773,7 +773,7 @@ int i915_gem_gtt_init(struct drm_device *dev)
void i915_gem_gtt_fini(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
iounmap(dev_priv->mm.gtt->gtt);
iounmap(dev_priv->mm.gsm);
teardown_scratch_page(dev);
if (INTEL_INFO(dev)->gen < 6)
intel_gmch_remove();

2
include/drm/intel-gtt.h
View File

@ -18,8 +18,6 @@ struct intel_gtt {
/* Share the scratch page dma with ppgtts. */
dma_addr_t scratch_page_dma;
struct page *scratch_page;
/* for ppgtt PDE access */
u32 __iomem *gtt;
/* needed for ioremap in drm/i915 */
phys_addr_t gma_bus_addr;
} *intel_gtt_get(void);