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author | Michel Thierry <michel.thierry@intel.com> | 2015-07-29 17:23:57 +0100 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-08-14 18:16:25 +0200 |
commit | ea91e401501a72597554cb5c080fe5671a6ccb84 (patch) | |
tree | 702398941067015a8a2f15b4cf46fc458e0e68a9 /drivers/gpu/drm/i915/i915_gem_gtt.c | |
parent | e1f123257a1f7d3af36a31a0fb2d4c6f40039fed (diff) | |
download | op-kernel-dev-ea91e401501a72597554cb5c080fe5671a6ccb84.zip op-kernel-dev-ea91e401501a72597554cb5c080fe5671a6ccb84.tar.gz |
drm/i915/gen8: Add ppgtt info and debug_dump
v2: Clean up patch after rebases.
v3: gen8_dump_ppgtt for 32b and 48b PPGTT.
v4: Use used_pml4es/pdpes (Akash).
v5: Rebase after Mika's ppgtt cleanup / scratch merge patch series.
v6: Rely on used_px bits instead of null checking (Akash)
Cc: Akash Goel <akash.goel@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Michel Thierry <michel.thierry@intel.com> (v2+)
Reviewed-by: Akash Goel <akash.goel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index a4bdef3..38439fa 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1358,6 +1358,89 @@ static int gen8_alloc_va_range(struct i915_address_space *vm, return gen8_alloc_va_range_3lvl(vm, &ppgtt->pdp, start, length); } +static void gen8_dump_pdp(struct i915_page_directory_pointer *pdp, + uint64_t start, uint64_t length, + gen8_pte_t scratch_pte, + struct seq_file *m) +{ + struct i915_page_directory *pd; + uint64_t temp; + uint32_t pdpe; + + gen8_for_each_pdpe(pd, pdp, start, length, temp, pdpe) { + struct i915_page_table *pt; + uint64_t pd_len = length; + uint64_t pd_start = start; + uint32_t pde; + + if (!test_bit(pdpe, pdp->used_pdpes)) + continue; + + seq_printf(m, "\tPDPE #%d\n", pdpe); + gen8_for_each_pde(pt, pd, pd_start, pd_len, temp, pde) { + uint32_t pte; + gen8_pte_t *pt_vaddr; + + if (!test_bit(pde, pd->used_pdes)) + continue; + + pt_vaddr = kmap_px(pt); + for (pte = 0; pte < GEN8_PTES; pte += 4) { + uint64_t va = + (pdpe << GEN8_PDPE_SHIFT) | + (pde << GEN8_PDE_SHIFT) | + (pte << GEN8_PTE_SHIFT); + int i; + bool found = false; + + for (i = 0; i < 4; i++) + if (pt_vaddr[pte + i] != scratch_pte) + found = true; + if (!found) + continue; + + seq_printf(m, "\t\t0x%llx [%03d,%03d,%04d]: =", va, pdpe, pde, pte); + for (i = 0; i < 4; i++) { + if (pt_vaddr[pte + i] != scratch_pte) + seq_printf(m, " %llx", pt_vaddr[pte + i]); + else + seq_puts(m, " SCRATCH "); + } + seq_puts(m, "\n"); + } + /* don't use kunmap_px, it could trigger + * an unnecessary flush. + */ + kunmap_atomic(pt_vaddr); + } + } +} + +static void gen8_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) +{ + struct i915_address_space *vm = &ppgtt->base; + uint64_t start = ppgtt->base.start; + uint64_t length = ppgtt->base.total; + gen8_pte_t scratch_pte = gen8_pte_encode(px_dma(vm->scratch_page), + I915_CACHE_LLC, true); + + if (!USES_FULL_48BIT_PPGTT(vm->dev)) { + gen8_dump_pdp(&ppgtt->pdp, start, length, scratch_pte, m); + } else { + uint64_t templ4, pml4e; + struct i915_pml4 *pml4 = &ppgtt->pml4; + struct i915_page_directory_pointer *pdp; + + gen8_for_each_pml4e(pdp, pml4, start, length, templ4, pml4e) { + if (!test_bit(pml4e, pml4->used_pml4es)) + continue; + + seq_printf(m, " PML4E #%llu\n", pml4e); + gen8_dump_pdp(pdp, start, length, scratch_pte, m); + } + } +} + /* * GEN8 legacy ppgtt programming is accomplished through a max 4 PDP registers * with a net effect resembling a 2-level page table in normal x86 terms. Each @@ -1380,6 +1463,7 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->base.clear_range = gen8_ppgtt_clear_range; ppgtt->base.unbind_vma = ppgtt_unbind_vma; ppgtt->base.bind_vma = ppgtt_bind_vma; + ppgtt->debug_dump = gen8_dump_ppgtt; if (USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) { ret = setup_px(ppgtt->base.dev, &ppgtt->pml4); |