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drm/i915: ppgtt binding/unbinding support

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This adds support to bind/unbind objects and wires it up. Objects are
only put into the ppgtt when necessary, i.e. at execbuf time.

Objects are still unconditionally put into the global gtt.

v2: Kill the quick hack and explicitly pass cache_level to ppgtt_bind
like for the global gtt function. Noticed by Chris Wilson.

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>
This commit is contained in:
Daniel Vetter
2012-02-09 17:15:47 +01:00
parent 1d2a314c97
commit 7bddb01fb9
4 changed files with 167 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/i915/i915_gem_gtt.c
+140 -6
View File
@@ -34,22 +34,31 @@ static void i915_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt,
unsigned first_entry,
unsigned num_entries)
{
int i, j;
uint32_t *pt_vaddr;
uint32_t scratch_pte;
unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
unsigned last_pte, i;
scratch_pte = GEN6_PTE_ADDR_ENCODE(ppgtt->scratch_page_dma_addr);
scratch_pte |= GEN6_PTE_VALID | GEN6_PTE_CACHE_LLC;
for (i = 0; i < ppgtt->num_pd_entries; i++) {
pt_vaddr = kmap_atomic(ppgtt->pt_pages[i]);
while (num_entries) {
last_pte = first_pte + num_entries;
if (last_pte > I915_PPGTT_PT_ENTRIES)
last_pte = I915_PPGTT_PT_ENTRIES;
for (j = 0; j < I915_PPGTT_PT_ENTRIES; j++)
pt_vaddr[j] = scratch_pte;
pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
for (i = first_pte; i < last_pte; i++)
pt_vaddr[i] = scratch_pte;
kunmap_atomic(pt_vaddr);
}
num_entries -= last_pte - first_pte;
first_pte = 0;
act_pd++;
}
}
int i915_gem_init_aliasing_ppgtt(struct drm_device *dev)
@@ -168,6 +177,131 @@ void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev)
kfree(ppgtt);
}
static void i915_ppgtt_insert_sg_entries(struct i915_hw_ppgtt *ppgtt,
struct scatterlist *sg_list,
unsigned sg_len,
unsigned first_entry,
uint32_t pte_flags)
{
uint32_t *pt_vaddr, pte;
unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
unsigned i, j, m, segment_len;
dma_addr_t page_addr;
struct scatterlist *sg;
/* init sg walking */
sg = sg_list;
i = 0;
segment_len = sg_dma_len(sg) >> PAGE_SHIFT;
m = 0;
while (i < sg_len) {
pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
for (j = first_pte; j < I915_PPGTT_PT_ENTRIES; j++) {
page_addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
pte = GEN6_PTE_ADDR_ENCODE(page_addr);
pt_vaddr[j] = pte | pte_flags;
/* grab the next page */
m++;
if (m == segment_len) {
sg = sg_next(sg);
i++;
if (i == sg_len)
break;
segment_len = sg_dma_len(sg) >> PAGE_SHIFT;
m = 0;
}
}
kunmap_atomic(pt_vaddr);
first_pte = 0;
act_pd++;
}
}
static void i915_ppgtt_insert_pages(struct i915_hw_ppgtt *ppgtt,
unsigned first_entry, unsigned num_entries,
struct page **pages, uint32_t pte_flags)
{
uint32_t *pt_vaddr, pte;
unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
unsigned last_pte, i;
dma_addr_t page_addr;
while (num_entries) {
last_pte = first_pte + num_entries;
last_pte = min_t(unsigned, last_pte, I915_PPGTT_PT_ENTRIES);
pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
for (i = first_pte; i < last_pte; i++) {
page_addr = page_to_phys(*pages);
pte = GEN6_PTE_ADDR_ENCODE(page_addr);
pt_vaddr[i] = pte | pte_flags;
pages++;
}
kunmap_atomic(pt_vaddr);
num_entries -= last_pte - first_pte;
first_pte = 0;
act_pd++;
}
}
void i915_ppgtt_bind_object(struct i915_hw_ppgtt *ppgtt,
struct drm_i915_gem_object *obj,
enum i915_cache_level cache_level)
{
struct drm_device *dev = obj->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t pte_flags = GEN6_PTE_VALID;
switch (cache_level) {
case I915_CACHE_LLC_MLC:
pte_flags |= GEN6_PTE_CACHE_LLC_MLC;
break;
case I915_CACHE_LLC:
pte_flags |= GEN6_PTE_CACHE_LLC;
break;
case I915_CACHE_NONE:
pte_flags |= GEN6_PTE_UNCACHED;
break;
default:
BUG();
}
if (dev_priv->mm.gtt->needs_dmar) {
BUG_ON(!obj->sg_list);
i915_ppgtt_insert_sg_entries(ppgtt,
obj->sg_list,
obj->num_sg,
obj->gtt_space->start >> PAGE_SHIFT,
pte_flags);
} else
i915_ppgtt_insert_pages(ppgtt,
obj->gtt_space->start >> PAGE_SHIFT,
obj->base.size >> PAGE_SHIFT,
obj->pages,
pte_flags);
}
void i915_ppgtt_unbind_object(struct i915_hw_ppgtt *ppgtt,
struct drm_i915_gem_object *obj)
{
i915_ppgtt_clear_range(ppgtt,
obj->gtt_space->start >> PAGE_SHIFT,
obj->base.size >> PAGE_SHIFT);
}
/* XXX kill agp_type! */
static unsigned int cache_level_to_agp_type(struct drm_device *dev,
enum i915_cache_level cache_level)