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drm/i915: Split GEN6 PPGTT initialization up 

Simply to match the GEN8 style of PPGTT initialization, split up the
allocations and mappings. Unlike GEN8, we skip a separate dma_addr_t
allocation function, as it is much simpler pre-gen8.

With this code it would be easy to make a more general PPGTT
initialization function with per GEN alloc/map/etc. or use a common
helper, similar to the ringbuffer code. I don't see a benefit to doing
this just yet, but who knows...

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2014-02-19 22:05:49 -08:00 committed by Daniel Vetter
parent a00d825de9
commit b146520ff9
1 changed files with 94 additions and 53 deletions
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147
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -1036,14 +1036,14 @@ static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
gen6_ppgtt_free(ppgtt);
}
static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
static int gen6_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt)
{
#define GEN6_PD_ALIGN (PAGE_SIZE * 16)
#define GEN6_PD_SIZE (GEN6_PPGTT_PD_ENTRIES * PAGE_SIZE)
struct drm_device *dev = ppgtt->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
bool retried = false;
int i, ret;
int ret;
/* PPGTT PDEs reside in the GGTT and consists of 512 entries. The
* allocator works in address space sizes, so it's multiplied by page
@ -1070,8 +1070,85 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
if (ppgtt->node.start < dev_priv->gtt.mappable_end)
DRM_DEBUG("Forced to use aperture for PDEs\n");
ppgtt->base.pte_encode = dev_priv->gtt.base.pte_encode;
ppgtt->num_pd_entries = GEN6_PPGTT_PD_ENTRIES;
return ret;
}
static int gen6_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt)
{
int i;
ppgtt->pt_pages = kcalloc(ppgtt->num_pd_entries, sizeof(struct page *),
GFP_KERNEL);
if (!ppgtt->pt_pages)
return -ENOMEM;
for (i = 0; i < ppgtt->num_pd_entries; i++) {
ppgtt->pt_pages[i] = alloc_page(GFP_KERNEL);
if (!ppgtt->pt_pages[i]) {
gen6_ppgtt_free(ppgtt);
return -ENOMEM;
}
}
return 0;
}
static int gen6_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt)
{
int ret;
ret = gen6_ppgtt_allocate_page_directories(ppgtt);
if (ret)
return ret;
ret = gen6_ppgtt_allocate_page_tables(ppgtt);
if (ret) {
drm_mm_remove_node(&ppgtt->node);
return ret;
}
ppgtt->pt_dma_addr = kcalloc(ppgtt->num_pd_entries, sizeof(dma_addr_t),
GFP_KERNEL);
if (!ppgtt->pt_dma_addr) {
drm_mm_remove_node(&ppgtt->node);
gen6_ppgtt_free(ppgtt);
return -ENOMEM;
}
return 0;
}
static int gen6_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt)
{
struct drm_device *dev = ppgtt->base.dev;
int i;
for (i = 0; i < ppgtt->num_pd_entries; i++) {
dma_addr_t pt_addr;
pt_addr = pci_map_page(dev->pdev, ppgtt->pt_pages[i], 0, 4096,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(dev->pdev, pt_addr)) {
gen6_ppgtt_unmap_pages(ppgtt);
return -EIO;
}
ppgtt->pt_dma_addr[i] = pt_addr;
}
return 0;
}
static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
{
struct drm_device *dev = ppgtt->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
ppgtt->base.pte_encode = dev_priv->gtt.base.pte_encode;
if (IS_GEN6(dev)) {
ppgtt->enable = gen6_ppgtt_enable;
ppgtt->switch_mm = gen6_mm_switch;
@ -1083,71 +1160,35 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
ppgtt->switch_mm = gen7_mm_switch;
} else
BUG();
ret = gen6_ppgtt_alloc(ppgtt);
if (ret)
return ret;
ret = gen6_ppgtt_setup_page_tables(ppgtt);
if (ret) {
gen6_ppgtt_free(ppgtt);
return ret;
}
ppgtt->base.clear_range = gen6_ppgtt_clear_range;
ppgtt->base.insert_entries = gen6_ppgtt_insert_entries;
ppgtt->base.cleanup = gen6_ppgtt_cleanup;
ppgtt->base.scratch = dev_priv->gtt.base.scratch;
ppgtt->base.start = 0;
ppgtt->base.total = GEN6_PPGTT_PD_ENTRIES * I915_PPGTT_PT_ENTRIES * PAGE_SIZE;
ppgtt->pt_pages = kcalloc(ppgtt->num_pd_entries, sizeof(struct page *),
GFP_KERNEL);
if (!ppgtt->pt_pages) {
drm_mm_remove_node(&ppgtt->node);
return -ENOMEM;
}
ppgtt->debug_dump = gen6_dump_ppgtt;
for (i = 0; i < ppgtt->num_pd_entries; i++) {
ppgtt->pt_pages[i] = alloc_page(GFP_KERNEL);
if (!ppgtt->pt_pages[i])
goto err_pt_alloc;
}
ppgtt->pt_dma_addr = kcalloc(ppgtt->num_pd_entries, sizeof(dma_addr_t),
GFP_KERNEL);
if (!ppgtt->pt_dma_addr)
goto err_pt_alloc;
for (i = 0; i < ppgtt->num_pd_entries; i++) {
dma_addr_t pt_addr;
pt_addr = pci_map_page(dev->pdev, ppgtt->pt_pages[i], 0, 4096,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(dev->pdev, pt_addr)) {
ret = -EIO;
goto err_pd_pin;
}
ppgtt->pt_dma_addr[i] = pt_addr;
}
ppgtt->pd_offset =
ppgtt->node.start / PAGE_SIZE * sizeof(gen6_gtt_pte_t);
ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total, true);
ppgtt->debug_dump = gen6_dump_ppgtt;
DRM_DEBUG_DRIVER("Allocated pde space (%ldM) at GTT entry: %lx\n",
ppgtt->node.size >> 20,
ppgtt->node.start / PAGE_SIZE);
ppgtt->pd_offset =
ppgtt->node.start / PAGE_SIZE * sizeof(gen6_gtt_pte_t);
return 0;
err_pd_pin:
if (ppgtt->pt_dma_addr) {
for (i--; i >= 0; i--)
pci_unmap_page(dev->pdev, ppgtt->pt_dma_addr[i],
4096, PCI_DMA_BIDIRECTIONAL);
}
err_pt_alloc:
kfree(ppgtt->pt_dma_addr);
for (i = 0; i < ppgtt->num_pd_entries; i++) {
if (ppgtt->pt_pages[i])
__free_page(ppgtt->pt_pages[i]);
}
kfree(ppgtt->pt_pages);
drm_mm_remove_node(&ppgtt->node);
return ret;
}
int i915_gem_init_ppgtt(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)