Michel Thierry <michel.thierry@xxxxxxxxx> writes:
> From: Ben Widawsky <benjamin.widawsky@xxxxxxxxx>
>
> In gen8, 32b PPGTT has always had one "pdp" (it doesn't actually have
> one, but it resembles having one). The #define was confusing as is, and
> using "PDPE" is a much better description.
>
> sed -i 's/GEN8_LEGACY_PDPS/GEN8_LEGACY_PDPES/' drivers/gpu/drm/i915/*.[ch]
>
> It also matches the x86 pagetable terminology:
> PTE = Page Table Entry - pagetable level 1 page
> PDE = Page Directory Entry - pagetable level 2 page
> PDPE = Page Directory Pointer Entry - pagetable level 3 page
>
> And in the near future (for 48b addressing):
> PML4E = Page Map Level 4 Entry
>
> v2: Expanded information about Page Directory/Table nomenclature.
>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> CC: Dave Gordon <david.s.gordon@xxxxxxxxx>
> Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx>
> Signed-off-by: Michel Thierry <michel.thierry@xxxxxxxxx> (v2)
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_gem_gtt.c | 6 +++---
> drivers/gpu/drm/i915/i915_gem_gtt.h | 6 +++---
> 2 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index 746f77f..58d54bd 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -375,7 +375,7 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
> pt_vaddr = NULL;
>
> for_each_sg_page(pages->sgl, &sg_iter, pages->nents, 0) {
> - if (WARN_ON(pdpe >= GEN8_LEGACY_PDPS))
> + if (WARN_ON(pdpe >= GEN8_LEGACY_PDPES))
> break;
>
> if (pt_vaddr == NULL)
> @@ -486,7 +486,7 @@ bail:
> static int gen8_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt,
> const int max_pdp)
> {
> - struct page **pt_pages[GEN8_LEGACY_PDPS];
> + struct page **pt_pages[GEN8_LEGACY_PDPES];
> int i, ret;
>
> for (i = 0; i < max_pdp; i++) {
> @@ -537,7 +537,7 @@ static int gen8_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt,
> return -ENOMEM;
>
> ppgtt->num_pd_pages = 1 << get_order(max_pdp << PAGE_SHIFT);
> - BUG_ON(ppgtt->num_pd_pages > GEN8_LEGACY_PDPS);
> + BUG_ON(ppgtt->num_pd_pages > GEN8_LEGACY_PDPES);
>
> return 0;
> }
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
> index e377c7d..9d998ec 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.h
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
> @@ -88,7 +88,7 @@ typedef gen8_gtt_pte_t gen8_ppgtt_pde_t;
> #define GEN8_PDE_MASK 0x1ff
> #define GEN8_PTE_SHIFT 12
> #define GEN8_PTE_MASK 0x1ff
> -#define GEN8_LEGACY_PDPS 4
> +#define GEN8_LEGACY_PDPES 4
> #define GEN8_PTES_PER_PAGE (PAGE_SIZE / sizeof(gen8_gtt_pte_t))
> #define GEN8_PDES_PER_PAGE (PAGE_SIZE / sizeof(gen8_ppgtt_pde_t))
>
> @@ -273,12 +273,12 @@ struct i915_hw_ppgtt {
> unsigned num_pd_pages; /* gen8+ */
> union {
> struct page **pt_pages;
> - struct page **gen8_pt_pages[GEN8_LEGACY_PDPS];
> + struct page **gen8_pt_pages[GEN8_LEGACY_PDPES];
> };
> struct page *pd_pages;
> union {
> uint32_t pd_offset;
> - dma_addr_t pd_dma_addr[GEN8_LEGACY_PDPS];
> + dma_addr_t pd_dma_addr[GEN8_LEGACY_PDPES];
> };
> union {
> dma_addr_t *pt_dma_addr;
> --
> 2.1.1
>
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