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authorBen Widawsky <benjamin.widawsky@intel.com>2014-03-26 11:36:37 -0700
committerBen Widawsky <benjamin.widawsky@intel.com>2014-06-20 16:43:02 -0700
commitf13e4c1e0d17ab8eaf58e66b31299d80f11bd159 (patch)
treeab55eb2868543004b8e5428b55a4bebbe1d3130f
parent8bf0107d1dacaae5f5c884545a11183fef66e569 (diff)
drm/i915/bdw: Use dynamic allocation idioms on free
The page directory freer is left here for now as it's still useful given that GEN8 still preallocates. Once the allocation functions are broken up into more discrete chunks, we'll follow suit and destroy this leftover piece. comments Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c45
-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.h26
2 files changed, 55 insertions, 16 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index c02b37e32f7b..06fb928bdab3 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -538,27 +538,40 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
}
}
-static void gen8_free_page_tables(struct i915_pagedir *pd, struct drm_device *dev)
+static void gen8_teardown_va_range(struct i915_address_space *vm,
+ uint64_t start, uint64_t length)
{
- int i;
-
- if (!pd->page)
- return;
-
- for (i = 0; i < I915_PDES_PER_PD; i++) {
- free_pt_single(pd->page_tables[i], dev);
- pd->page_tables[i] = NULL;
+ struct i915_hw_ppgtt *ppgtt =
+ container_of(vm, struct i915_hw_ppgtt, base);
+ struct i915_pagedir *pd;
+ struct i915_pagetab *pt;
+ uint64_t temp;
+ uint32_t pdpe, pde;
+
+ gen8_for_each_pdpe(pd, &ppgtt->pdp, start, length, temp, pdpe) {
+ uint64_t pd_len = gen8_clamp_pd(start, length);
+ uint64_t pd_start = start;
+ gen8_for_each_pde(pt, pd, pd_start, pd_len, temp, pde) {
+ free_pt_single(pt, vm->dev);
+ }
+ free_pd_single(pd, vm->dev);
}
}
-static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
+/* This function will die soon */
+static void gen8_free_full_pagedir(struct i915_hw_ppgtt *ppgtt, int i)
{
- int i;
+ gen8_teardown_va_range(&ppgtt->base,
+ i << GEN8_PDPE_SHIFT,
+ (1 << GEN8_PDPE_SHIFT));
+}
- for (i = 0; i < ppgtt->num_pd_pages; i++) {
- gen8_free_page_tables(ppgtt->pdp.pagedirs[i], ppgtt->base.dev);
- free_pd_single(ppgtt->pdp.pagedirs[i], ppgtt->base.dev);
- }
+static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
+{
+ trace_i915_va_teardown(&ppgtt->base,
+ ppgtt->base.start, ppgtt->base.total);
+ gen8_teardown_va_range(&ppgtt->base,
+ ppgtt->base.start, ppgtt->base.total);
}
static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
@@ -587,7 +600,7 @@ static int gen8_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt)
unwind_out:
while (i--)
- gen8_free_page_tables(ppgtt->pdp.pagedirs[i], ppgtt->base.dev);
+ gen8_free_full_pagedir(ppgtt, i);
return -ENOMEM;
}
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index b3044f6420b5..38c2f8e3faa7 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -396,6 +396,32 @@ static inline size_t gen6_pde_count(uint32_t addr, uint32_t length)
return i915_pde_count(addr, length, GEN6_PDE_SHIFT);
}
+#define gen8_for_each_pde(pt, pd, start, length, temp, iter) \
+ for (iter = gen8_pde_index(start), pt = (pd)->page_tables[iter]; \
+ length > 0 && iter < I915_PDES_PER_PD; \
+ pt = (pd)->page_tables[++iter], \
+ temp = ALIGN(start+1, 1 << GEN8_PDE_SHIFT) - start, \
+ temp = min(temp, length), \
+ start += temp, length -= temp)
+
+#define gen8_for_each_pdpe(pd, pdp, start, length, temp, iter) \
+ for (iter = gen8_pdpe_index(start), pd = (pdp)->pagedirs[iter]; \
+ length > 0 && iter < GEN8_LEGACY_PDPES; \
+ pd = (pdp)->pagedirs[++iter], \
+ temp = ALIGN(start+1, 1 << GEN8_PDPE_SHIFT) - start, \
+ temp = min(temp, length), \
+ start += temp, length -= temp)
+
+/* Clamp length to the next pagedir boundary */
+static inline uint64_t gen8_clamp_pd(uint64_t start, uint64_t length)
+{
+ uint64_t next_pd = ALIGN(start + 1, 1 << GEN8_PDPE_SHIFT);
+ if (next_pd > (start + length))
+ return length;
+
+ return next_pd - start;
+}
+
static inline uint32_t gen8_pte_index(uint64_t address)
{
return i915_pte_index(address, GEN8_PDE_SHIFT);