Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 54 ++++++++++++++++++++-----------------
drivers/gpu/drm/i915/i915_gem_gtt.h | 10 +++++++
2 files changed, 39 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 10cfad8..041ddca 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -553,14 +553,6 @@ static void gen8_teardown_va_range(struct i915_address_space *vm,
}
}
-/* This function will die soon */
-static void gen8_free_full_pagedir(struct i915_hw_ppgtt *ppgtt, int i)
-{
- gen8_teardown_va_range(&ppgtt->base,
- i << GEN8_PDPE_SHIFT,
- (1 << GEN8_PDPE_SHIFT));
-}
-
static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt)
{
trace_i915_va_teardown(&ppgtt->base,
@@ -580,22 +572,27 @@ static void gen8_ppgtt_cleanup(struct i915_address_space *vm)
gen8_ppgtt_free(ppgtt);
}
-static int gen8_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt)
+static int gen8_ppgtt_alloc_pagetabs(struct i915_pagedir *pd,
+ uint64_t start,
+ uint64_t length,
+ struct drm_device *dev)
{
- int i, ret;
+ struct i915_pagetab *unused;
+ uint64_t temp;
+ uint32_t pde;
- for (i = 0; i < ppgtt->num_pd_pages; i++) {
- ret = alloc_pt_range(ppgtt->pdp.pagedirs[i],
- 0, I915_PDES_PER_PD, ppgtt->base.dev);
- if (ret)
+ gen8_for_each_pde(unused, pd, start, length, temp, pde) {
+ BUG_ON(unused);
+ pd->page_tables[pde] = alloc_pt_single(dev);
+ if (IS_ERR(pd->page_tables[pde]))
goto unwind_out;
}
return 0;
unwind_out:
- while (i--)
- gen8_free_full_pagedir(ppgtt, i);
+ while (pde--)
+ free_pt_single(pd->page_tables[pde], dev);
return -ENOMEM;
}
@@ -639,20 +636,28 @@ unwind_out:
}
static int gen8_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt,
- const int max_pdp)
+ uint64_t start,
+ uint64_t length)
{
+ struct i915_pagedir *pd;
+ uint64_t temp;
+ uint32_t pdpe;
int ret;
- ret = gen8_ppgtt_alloc_pagedirs(&ppgtt->pdp, ppgtt->base.start,
- ppgtt->base.total);
+ ret = gen8_ppgtt_alloc_pagedirs(&ppgtt->pdp, start, length);
if (ret)
return ret;
- ret = gen8_ppgtt_allocate_page_tables(ppgtt);
- if (ret)
- goto err_out;
+ gen8_for_each_pdpe(pd, &ppgtt->pdp, start, length, temp, pdpe) {
+ ret = gen8_ppgtt_alloc_pagetabs(pd, start, length,
+ ppgtt->base.dev);
+ if (ret)
+ goto err_out;
+
+ ppgtt->num_pd_entries += I915_PDES_PER_PD;
+ }
- ppgtt->num_pd_entries = max_pdp * I915_PDES_PER_PD;
+ BUG_ON(pdpe > ppgtt->num_pd_pages);
return 0;
@@ -683,10 +688,9 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size)
ppgtt->base.start = 0;
ppgtt->base.total = size;
- BUG_ON(ppgtt->base.total == 0);
/* 1. Do all our allocations for page directories and page tables. */
- ret = gen8_ppgtt_alloc(ppgtt, max_pdp);
+ ret = gen8_ppgtt_alloc(ppgtt, ppgtt->base.start, ppgtt->base.total);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index f81b26a..fae0867 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -411,6 +411,16 @@ static inline size_t gen6_pde_count(uint32_t addr, uint32_t length)
temp = min(temp, length), \
start += temp, length -= temp)
+/* Clamp length to the next pagetab boundary */
+static inline uint64_t gen8_clamp_pt(uint64_t start, uint64_t length)
+{
+ uint64_t next_pt = ALIGN(start + 1, 1 << GEN8_PDE_SHIFT);
+ if (next_pt > (start + length))
+ return length;
+
+ return next_pt - start;
+}
+
/* Clamp length to the next pagedir boundary */
static inline uint64_t gen8_clamp_pd(uint64_t start, uint64_t length)
{
--
1.9.2
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