From: Ben Widawsky <benjamin.widaw...@intel.com> These values are never quite useful for dynamic allocations of the page tables. Getting rid of them will help prevent later confusion.
v2: Updated to use unmap_and_free_pd functions. v3: Updated gen8_ppgtt_free after teardown logic was removed. v4: Rebase after s/page_tables/page_table/. Signed-off-by: Ben Widawsky <b...@bwidawsk.net> Signed-off-by: Michel Thierry <michel.thie...@intel.com> (v2+) --- drivers/gpu/drm/i915/i915_debugfs.c | 2 -- drivers/gpu/drm/i915/i915_gem_gtt.c | 72 ++++++++++++------------------------- drivers/gpu/drm/i915/i915_gem_gtt.h | 7 ++-- 3 files changed, 28 insertions(+), 53 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index e8ad450..e85da9d 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2149,8 +2149,6 @@ static void gen8_ppgtt_info(struct seq_file *m, struct drm_device *dev) if (!ppgtt) return; - seq_printf(m, "Page directories: %d\n", ppgtt->num_pd_pages); - seq_printf(m, "Page tables: %d\n", ppgtt->num_pd_entries); for_each_ring(ring, dev_priv, unused) { seq_printf(m, "%s\n", ring->name); for (i = 0; i < 4; i++) { diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 2e4db77..bddfcc2 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -613,9 +613,7 @@ static void gen8_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt) struct pci_dev *hwdev = ppgtt->base.dev->pdev; int i, j; - for (i = 0; i < ppgtt->num_pd_pages; i++) { - /* TODO: In the future we'll support sparse mappings, so this - * will have to change. */ + for (i = 0; i < GEN8_LEGACY_PDPES; i++) { if (!ppgtt->pdp.page_directory[i]->daddr) continue; @@ -644,7 +642,7 @@ static void gen8_ppgtt_free(struct i915_hw_ppgtt *ppgtt) { int i; - for (i = 0; i < ppgtt->num_pd_pages; i++) { + for (i = 0; i < GEN8_LEGACY_PDPES; i++) { if (WARN_ON(!ppgtt->pdp.page_directory[i])) continue; @@ -705,21 +703,13 @@ static int gen8_ppgtt_alloc_page_directories(struct i915_page_directory_pointer_ pdp->page_directory[pdpe] = alloc_pd_single(); if (IS_ERR(ppgtt->pdp.page_directory[pdpe])) goto unwind_out; - - ppgtt->num_pd_pages++; } - BUG_ON(ppgtt->num_pd_pages > GEN8_LEGACY_PDPES); - return 0; unwind_out: - while (pdpe--) { + while (pdpe--) unmap_and_free_pd(ppgtt->pdp.page_directory[pdpe]); - ppgtt->num_pd_pages--; - } - - WARN_ON(ppgtt->num_pd_pages); return -ENOMEM; } @@ -742,12 +732,8 @@ static int gen8_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt, ppgtt->base.dev); if (ret) goto err_out; - - ppgtt->num_pd_entries += GEN8_PDES_PER_PAGE; } - BUG_ON(pdpe > ppgtt->num_pd_pages); - return 0; err_out: @@ -808,7 +794,6 @@ static int gen8_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt, static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size) { const int max_pdp = DIV_ROUND_UP(size, 1 << 30); - const int min_pt_pages = GEN8_PDES_PER_PAGE * max_pdp; int i, j, ret; if (size % (1<<30)) @@ -872,12 +857,6 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size) ppgtt->base.cleanup = gen8_ppgtt_cleanup; ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total, true); - - DRM_DEBUG_DRIVER("Allocated %d pages for page directories (%d wasted)\n", - ppgtt->num_pd_pages, ppgtt->num_pd_pages - max_pdp); - DRM_DEBUG_DRIVER("Allocated %d pages for page tables (%lld wasted)\n", - ppgtt->num_pd_entries, - (ppgtt->num_pd_entries - min_pt_pages) + size % (1<<30)); return 0; bail: @@ -888,26 +867,20 @@ bail: static void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt, struct seq_file *m) { - struct drm_i915_private *dev_priv = ppgtt->base.dev->dev_private; struct i915_address_space *vm = &ppgtt->base; - gen6_gtt_pte_t __iomem *pd_addr; + struct i915_page_table_entry *unused; gen6_gtt_pte_t scratch_pte; uint32_t pd_entry; - int pte, pde; + uint32_t pte, pde, temp; + uint32_t start = ppgtt->base.start, length = ppgtt->base.total; scratch_pte = vm->pte_encode(vm->scratch.addr, I915_CACHE_LLC, true, 0); - pd_addr = (gen6_gtt_pte_t __iomem *)dev_priv->gtt.gsm + - ppgtt->pd.pd_offset / sizeof(gen6_gtt_pte_t); - - seq_printf(m, " VM %p (pd_offset %x-%x):\n", vm, - ppgtt->pd.pd_offset, - ppgtt->pd.pd_offset + ppgtt->num_pd_entries); - for (pde = 0; pde < ppgtt->num_pd_entries; pde++) { + gen6_for_each_pde(unused, &ppgtt->pd, start, length, temp, pde) { u32 expected; gen6_gtt_pte_t *pt_vaddr; dma_addr_t pt_addr = ppgtt->pd.page_table[pde]->daddr; - pd_entry = readl(pd_addr + pde); + pd_entry = readl(ppgtt->pd_addr + pde); expected = (GEN6_PDE_ADDR_ENCODE(pt_addr) | GEN6_PDE_VALID); if (pd_entry != expected) @@ -1189,12 +1162,15 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm, static void gen6_ppgtt_unmap_pages(struct i915_hw_ppgtt *ppgtt) { - int i; + struct i915_page_table_entry *pt; + uint32_t pde; - for (i = 0; i < ppgtt->num_pd_entries; i++) - pci_unmap_page(ppgtt->base.dev->pdev, - ppgtt->pd.page_table[i]->daddr, - 4096, PCI_DMA_BIDIRECTIONAL); + gen6_for_all_pdes(pt, ppgtt, pde) { + if (pt != ppgtt->scratch_pt) + pci_unmap_page(ppgtt->base.dev->pdev, + pt->daddr, + 4096, PCI_DMA_BIDIRECTIONAL); + } } /* PDE TLBs are a pain invalidate pre GEN8. It requires a context reload. If we @@ -1293,13 +1269,12 @@ unwind_out: static void gen6_ppgtt_free(struct i915_hw_ppgtt *ppgtt) { - int i; - - for (i = 0; i < ppgtt->num_pd_entries; i++) { - struct i915_page_table_entry *pt = ppgtt->pd.page_table[i]; + struct i915_page_table_entry *pt; + uint32_t pde; + gen6_for_all_pdes(pt, ppgtt, pde) { if (pt != ppgtt->scratch_pt) - unmap_and_free_pt(ppgtt->pd.page_table[i], ppgtt->base.dev); + unmap_and_free_pt(pt, ppgtt->base.dev); } unmap_and_free_pt(ppgtt->scratch_pt, ppgtt->base.dev); @@ -1358,7 +1333,6 @@ alloc: if (ppgtt->node.start < dev_priv->gtt.mappable_end) DRM_DEBUG("Forced to use aperture for PDEs\n"); - ppgtt->num_pd_entries = GEN6_PPGTT_PD_ENTRIES; return 0; err_out: @@ -1412,7 +1386,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt, bool aliasing) if (aliasing) { /* preallocate all pts */ - ret = alloc_pt_range(&ppgtt->pd, 0, ppgtt->num_pd_entries, + ret = alloc_pt_range(&ppgtt->pd, 0, GEN6_PPGTT_PD_ENTRIES, ppgtt->base.dev); if (ret) { @@ -1427,7 +1401,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt, bool aliasing) ppgtt->base.insert_entries = gen6_ppgtt_insert_entries; ppgtt->base.cleanup = gen6_ppgtt_cleanup; ppgtt->base.start = 0; - ppgtt->base.total = ppgtt->num_pd_entries * I915_PPGTT_PT_ENTRIES * PAGE_SIZE; + ppgtt->base.total = GEN6_PPGTT_PD_ENTRIES * I915_PPGTT_PT_ENTRIES * PAGE_SIZE; ppgtt->debug_dump = gen6_dump_ppgtt; ppgtt->pd.pd_offset = @@ -1730,7 +1704,7 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev) ppgtt = dev_priv->mm.aliasing_ppgtt; gen6_write_page_range(dev_priv, &ppgtt->pd, 0, - ppgtt->num_pd_entries); + GEN6_PPGTT_PD_ENTRIES); } } diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index 7a16627..b53d40ca 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -299,8 +299,6 @@ struct i915_hw_ppgtt { struct kref ref; struct drm_mm_node node; unsigned long pd_dirty_rings; - unsigned num_pd_entries; - unsigned num_pd_pages; /* gen8+ */ union { struct i915_page_directory_pointer_entry pdp; struct i915_page_directory_entry pd; @@ -338,6 +336,11 @@ struct i915_hw_ppgtt { temp = min_t(unsigned, temp, length), \ start += temp, length -= temp) +#define gen6_for_all_pdes(pt, ppgtt, iter) \ + for (iter = 0, pt = ppgtt->pd.page_table[iter]; \ + iter < gen6_pde_index(ppgtt->base.total); \ + pt = ppgtt->pd.page_table[++iter]) + static inline uint32_t i915_pte_index(uint64_t address, uint32_t pde_shift) { const uint32_t mask = NUM_PTE(pde_shift) - 1; -- 2.1.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx