Create a kernel only internal memory region that uses ttm pool allocator to allocate volatile system pages. Refactor internal buffer backend to simply allocate from this new region.
Signed-off-by: Robert Beckett bob.beckett@collabora.com --- drivers/gpu/drm/i915/gem/i915_gem_internal.c | 187 +----------------- drivers/gpu/drm/i915/gem/i915_gem_internal.h | 5 - drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 1 + .../drm/i915/gem/selftests/i915_gem_mman.c | 3 + drivers/gpu/drm/i915/i915_pci.c | 4 +- drivers/gpu/drm/i915/intel_memory_region.c | 8 +- drivers/gpu/drm/i915/intel_memory_region.h | 2 + .../gpu/drm/i915/selftests/mock_gem_device.c | 2 +- 8 files changed, 21 insertions(+), 191 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_internal.c b/drivers/gpu/drm/i915/gem/i915_gem_internal.c index c698f95af15f..a83751867ac7 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_internal.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.c @@ -4,188 +4,9 @@ * Copyright © 2014-2016 Intel Corporation */
-#include <linux/scatterlist.h> -#include <linux/slab.h> -#include <linux/swiotlb.h> - +#include "gem/i915_gem_internal.h" +#include "gem/i915_gem_region.h" #include "i915_drv.h" -#include "i915_gem.h" -#include "i915_gem_internal.h" -#include "i915_gem_object.h" -#include "i915_scatterlist.h" -#include "i915_utils.h" - -#define QUIET (__GFP_NORETRY | __GFP_NOWARN) -#define MAYFAIL (__GFP_RETRY_MAYFAIL | __GFP_NOWARN) - -static void internal_free_pages(struct sg_table *st) -{ - struct scatterlist *sg; - - for (sg = st->sgl; sg; sg = __sg_next(sg)) { - if (sg_page(sg)) - __free_pages(sg_page(sg), get_order(sg->length)); - } - - sg_free_table(st); - kfree(st); -} - -static int i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj) -{ - struct drm_i915_private *i915 = to_i915(obj->base.dev); - struct sg_table *st; - struct scatterlist *sg; - unsigned int sg_page_sizes; - unsigned int npages; - int max_order; - gfp_t gfp; - - max_order = MAX_ORDER; -#ifdef CONFIG_SWIOTLB - if (is_swiotlb_active(obj->base.dev->dev)) { - unsigned int max_segment; - - max_segment = swiotlb_max_segment(); - if (max_segment) { - max_segment = max_t(unsigned int, max_segment, - PAGE_SIZE) >> PAGE_SHIFT; - max_order = min(max_order, ilog2(max_segment)); - } - } -#endif - - gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_RECLAIMABLE; - if (IS_I965GM(i915) || IS_I965G(i915)) { - /* 965gm cannot relocate objects above 4GiB. */ - gfp &= ~__GFP_HIGHMEM; - gfp |= __GFP_DMA32; - } - -create_st: - st = kmalloc(sizeof(*st), GFP_KERNEL); - if (!st) - return -ENOMEM; - - npages = obj->base.size / PAGE_SIZE; - if (sg_alloc_table(st, npages, GFP_KERNEL)) { - kfree(st); - return -ENOMEM; - } - - sg = st->sgl; - st->nents = 0; - sg_page_sizes = 0; - - do { - int order = min(fls(npages) - 1, max_order); - struct page *page; - - do { - page = alloc_pages(gfp | (order ? QUIET : MAYFAIL), - order); - if (page) - break; - if (!order--) - goto err; - - /* Limit subsequent allocations as well */ - max_order = order; - } while (1); - - sg_set_page(sg, page, PAGE_SIZE << order, 0); - sg_page_sizes |= PAGE_SIZE << order; - st->nents++; - - npages -= 1 << order; - if (!npages) { - sg_mark_end(sg); - break; - } - - sg = __sg_next(sg); - } while (1); - - if (i915_gem_gtt_prepare_pages(obj, st)) { - /* Failed to dma-map try again with single page sg segments */ - if (get_order(st->sgl->length)) { - internal_free_pages(st); - max_order = 0; - goto create_st; - } - goto err; - } - - __i915_gem_object_set_pages(obj, st, sg_page_sizes); - - return 0; - -err: - sg_set_page(sg, NULL, 0, 0); - sg_mark_end(sg); - internal_free_pages(st); - - return -ENOMEM; -} - -static void i915_gem_object_put_pages_internal(struct drm_i915_gem_object *obj, - struct sg_table *pages) -{ - i915_gem_gtt_finish_pages(obj, pages); - internal_free_pages(pages); - - obj->mm.dirty = false; - - __start_cpu_write(obj); -} - -static const struct drm_i915_gem_object_ops i915_gem_object_internal_ops = { - .name = "i915_gem_object_internal", - .flags = I915_GEM_OBJECT_IS_SHRINKABLE, - .get_pages = i915_gem_object_get_pages_internal, - .put_pages = i915_gem_object_put_pages_internal, -}; - -struct drm_i915_gem_object * -__i915_gem_object_create_internal(struct drm_i915_private *i915, - const struct drm_i915_gem_object_ops *ops, - phys_addr_t size) -{ - static struct lock_class_key lock_class; - struct drm_i915_gem_object *obj; - unsigned int cache_level; - - GEM_BUG_ON(!size); - GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE)); - - if (overflows_type(size, obj->base.size)) - return ERR_PTR(-E2BIG); - - obj = i915_gem_object_alloc(); - if (!obj) - return ERR_PTR(-ENOMEM); - - drm_gem_private_object_init(&i915->drm, &obj->base, size); - i915_gem_object_init(obj, ops, &lock_class, 0); - obj->mem_flags |= I915_BO_FLAG_STRUCT_PAGE; - - /* - * Mark the object as volatile, such that the pages are marked as - * dontneed whilst they are still pinned. As soon as they are unpinned - * they are allowed to be reaped by the shrinker, and the caller is - * expected to repopulate - the contents of this object are only valid - * whilst active and pinned. - */ - i915_gem_object_set_volatile(obj); - - obj->read_domains = I915_GEM_DOMAIN_CPU; - obj->write_domain = I915_GEM_DOMAIN_CPU; - - cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE; - i915_gem_object_set_cache_coherency(obj, cache_level); - - return obj; -}
/** * i915_gem_object_create_internal: create an object with volatile pages @@ -206,5 +27,7 @@ struct drm_i915_gem_object * i915_gem_object_create_internal(struct drm_i915_private *i915, phys_addr_t size) { - return __i915_gem_object_create_internal(i915, &i915_gem_object_internal_ops, size); + return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_INTERNAL], + size, 0, I915_BO_ALLOC_VOLATILE); } + diff --git a/drivers/gpu/drm/i915/gem/i915_gem_internal.h b/drivers/gpu/drm/i915/gem/i915_gem_internal.h index 6664e06112fc..524e1042b20f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_internal.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.h @@ -15,9 +15,4 @@ struct drm_i915_private; struct drm_i915_gem_object * i915_gem_object_create_internal(struct drm_i915_private *i915, phys_addr_t size); -struct drm_i915_gem_object * -__i915_gem_object_create_internal(struct drm_i915_private *i915, - const struct drm_i915_gem_object_ops *ops, - phys_addr_t size); - #endif /* __I915_GEM_INTERNAL_H__ */ diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h index 73e371aa3850..cb4cab8a13e1 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h @@ -92,4 +92,5 @@ static inline bool i915_ttm_cpu_maps_iomem(struct ttm_resource *mem) /* Once / if we support GGTT, this is also false for cached ttm_tts */ return mem->mem_type != I915_PL_SYSTEM; } + #endif diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c index ee2ad1281f97..dcb2bda6cbc5 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c @@ -864,6 +864,9 @@ static bool can_mmap(struct drm_i915_gem_object *obj, enum i915_mmap_type type) struct drm_i915_private *i915 = to_i915(obj->base.dev); bool no_map;
+ if (obj->mm.region && obj->mm.region->private) + return false; + if (obj->ops->mmap_offset) return type == I915_MMAP_TYPE_FIXED; else if (type == I915_MMAP_TYPE_FIXED) diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index a5a1a7647320..7ba7becdf71c 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -159,7 +159,7 @@ .page_sizes = I915_GTT_PAGE_SIZE_4K
#define GEN_DEFAULT_REGIONS \ - .memory_regions = REGION_SMEM | REGION_STOLEN_SMEM + .memory_regions = REGION_SMEM | REGION_STOLEN_SMEM | REGION_INTERNAL
#define I830_FEATURES \ GEN(2), \ @@ -905,7 +905,7 @@ static const struct intel_device_info rkl_info = { };
#define DGFX_FEATURES \ - .memory_regions = REGION_SMEM | REGION_LMEM | REGION_STOLEN_LMEM, \ + .memory_regions = REGION_SMEM | REGION_LMEM | REGION_STOLEN_LMEM | REGION_INTERNAL, \ .has_llc = 0, \ .has_pxp = 0, \ .has_snoop = 1, \ diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c index e38d2db1c3e3..a91756fcee85 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.c +++ b/drivers/gpu/drm/i915/intel_memory_region.c @@ -31,6 +31,10 @@ static const struct { .class = INTEL_MEMORY_STOLEN_LOCAL, .instance = 0, }, + [INTEL_REGION_INTERNAL] = { + .class = INTEL_MEMORY_SYSTEM, + .instance = 1, + } };
static int __iopagetest(struct intel_memory_region *mem, @@ -309,12 +313,14 @@ int intel_memory_regions_hw_probe(struct drm_i915_private *i915) instance = intel_region_map[i].instance; switch (type) { case INTEL_MEMORY_SYSTEM: - if (IS_DGFX(i915)) + if (IS_DGFX(i915) || i == INTEL_REGION_INTERNAL) mem = i915_gem_ttm_system_setup(i915, type, instance); else mem = i915_gem_shmem_setup(i915, type, instance); + if (i == INTEL_REGION_INTERNAL) + mem->private = true; break; case INTEL_MEMORY_STOLEN_LOCAL: mem = i915_gem_stolen_lmem_setup(i915, type, instance); diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h index 3d8378c1b447..4038913bc467 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.h +++ b/drivers/gpu/drm/i915/intel_memory_region.h @@ -35,6 +35,7 @@ enum intel_region_id { INTEL_REGION_LMEM_3, INTEL_REGION_STOLEN_SMEM, INTEL_REGION_STOLEN_LMEM, + INTEL_REGION_INTERNAL, INTEL_REGION_UNKNOWN, /* Should be last */ };
@@ -42,6 +43,7 @@ enum intel_region_id { #define REGION_LMEM BIT(INTEL_REGION_LMEM_0) #define REGION_STOLEN_SMEM BIT(INTEL_REGION_STOLEN_SMEM) #define REGION_STOLEN_LMEM BIT(INTEL_REGION_STOLEN_LMEM) +#define REGION_INTERNAL BIT(INTEL_REGION_INTERNAL)
#define I915_ALLOC_CONTIGUOUS BIT(0)
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c index 9c31a16f8380..eaa169effedc 100644 --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c @@ -179,7 +179,7 @@ struct drm_i915_private *mock_gem_device(void) I915_GTT_PAGE_SIZE_64K | I915_GTT_PAGE_SIZE_2M;
- mkwrite_device_info(i915)->memory_regions = REGION_SMEM; + mkwrite_device_info(i915)->memory_regions = REGION_SMEM | REGION_INTERNAL; intel_memory_regions_hw_probe(i915);
spin_lock_init(&i915->gpu_error.lock);