/* * Copyright © 2014 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Please try to maintain the following order within this file unless it makes * sense to do otherwise. From top to bottom: * 1. typedefs * 2. #defines, and macros * 3. structure definitions * 4. function prototypes * * Within each section, please try to order by generation in ascending order, * from top to bottom (ie. gen6 on the top, gen8 on the bottom). */ #ifndef __I915_GEM_GTT_H__ #define __I915_GEM_GTT_H__ typedef uint32_t gen6_gtt_pte_t; typedef uint64_t gen8_gtt_pte_t; typedef gen8_gtt_pte_t gen8_ppgtt_pde_t; #define gtt_total_entries(gtt) ((gtt).base.total >> PAGE_SHIFT) #define I915_PPGTT_PT_ENTRIES (PAGE_SIZE / sizeof(gen6_gtt_pte_t)) /* gen6-hsw has bit 11-4 for physical addr bit 39-32 */ #define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0)) #define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr) #define GEN6_PDE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr) #define GEN6_PTE_CACHE_LLC (2 << 1) #define GEN6_PTE_UNCACHED (1 << 1) #define GEN6_PTE_VALID (1 << 0) #define GEN6_PPGTT_PD_ENTRIES 512 #define GEN6_PD_SIZE (GEN6_PPGTT_PD_ENTRIES * PAGE_SIZE) #define GEN6_PD_ALIGN (PAGE_SIZE * 16) #define GEN6_PDE_VALID (1 << 0) #define GEN7_PTE_CACHE_L3_LLC (3 << 1) #define BYT_PTE_SNOOPED_BY_CPU_CACHES (1 << 2) #define BYT_PTE_WRITEABLE (1 << 1) /* Cacheability Control is a 4-bit value. The low three bits are stored in bits * 3:1 of the PTE, while the fourth bit is stored in bit 11 of the PTE. */ #define HSW_CACHEABILITY_CONTROL(bits) ((((bits) & 0x7) << 1) | \ (((bits) & 0x8) << (11 - 3))) #define HSW_WB_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x2) #define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3) #define HSW_WB_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x8) #define HSW_WB_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0xb) #define HSW_WT_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x7) #define HSW_WT_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x6) #define HSW_PTE_UNCACHED (0) #define HSW_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0x7f0)) #define HSW_PTE_ADDR_ENCODE(addr) HSW_GTT_ADDR_ENCODE(addr) /* GEN8 legacy style address is defined as a 3 level page table: * 31:30 | 29:21 | 20:12 | 11:0 * PDPE | PDE | PTE | offset * The difference as compared to normal x86 3 level page table is the PDPEs are * programmed via register. */ #define GEN8_PDPE_SHIFT 30 #define GEN8_PDPE_MASK 0x3 #define GEN8_PDE_SHIFT 21 #define GEN8_PDE_MASK 0x1ff #define GEN8_PTE_SHIFT 12 #define GEN8_PTE_MASK 0x1ff #define GEN8_LEGACY_PDPS 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)) #define PPAT_UNCACHED_INDEX (_PAGE_PWT | _PAGE_PCD) #define PPAT_CACHED_PDE_INDEX 0 /* WB LLC */ #define PPAT_CACHED_INDEX _PAGE_PAT /* WB LLCeLLC */ #define PPAT_DISPLAY_ELLC_INDEX _PAGE_PCD /* WT eLLC */ #define GEN8_PPAT_AGE(x) (x<<4) #define GEN8_PPAT_LLCeLLC (3<<2) #define GEN8_PPAT_LLCELLC (2<<2) #define GEN8_PPAT_LLC (1<<2) #define GEN8_PPAT_WB (3<<0) #define GEN8_PPAT_WT (2<<0) #define GEN8_PPAT_WC (1<<0) #define GEN8_PPAT_UC (0<<0) #define GEN8_PPAT_ELLC_OVERRIDE (0<<2) #define GEN8_PPAT(i, x) ((uint64_t) (x) << ((i) * 8)) enum i915_cache_level; /** * A VMA represents a GEM BO that is bound into an address space. Therefore, a * VMA's presence cannot be guaranteed before binding, or after unbinding the * object into/from the address space. * * To make things as simple as possible (ie. no refcounting), a VMA's lifetime * will always be <= an objects lifetime. So object refcounting should cover us. */ struct i915_vma { struct drm_mm_node node; struct drm_i915_gem_object *obj; struct i915_address_space *vm; /** This object's place on the active/inactive lists */ struct list_head mm_list; struct list_head vma_link; /* Link in the object's VMA list */ /** This vma's place in the batchbuffer or on the eviction list */ struct list_head exec_list; /** * Used for performing relocations during execbuffer insertion. */ struct hlist_node exec_node; unsigned long exec_handle; struct drm_i915_gem_exec_object2 *exec_entry; /** * How many users have pinned this object in GTT space. The following * users can each hold at most one reference: pwrite/pread, pin_ioctl * (via user_pin_count), execbuffer (objects are not allowed multiple * times for the same batchbuffer), and the framebuffer code. When * switching/pageflipping, the framebuffer code has at most two buffers * pinned per crtc. * * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3 * bits with absolutely no headroom. So use 4 bits. */ unsigned int pin_count:4; #define DRM_I915_GEM_OBJECT_MAX_PIN_COUNT 0xf /** Unmap an object from an address space. This usually consists of * setting the valid PTE entries to a reserved scratch page. */ void (*unbind_vma)(struct i915_vma *vma); /* Map an object into an address space with the given cache flags. */ #define GLOBAL_BIND (1<<0) void (*bind_vma)(struct i915_vma *vma, enum i915_cache_level cache_level, u32 flags); }; struct i915_address_space { struct drm_mm mm; struct drm_device *dev; struct list_head global_link; unsigned long start; /* Start offset always 0 for dri2 */ size_t total; /* size addr space maps (ex. 2GB for ggtt) */ struct { dma_addr_t addr; struct page *page; } scratch; /** * List of objects currently involved in rendering. * * Includes buffers having the contents of their GPU caches * flushed, not necessarily primitives. last_rendering_seqno * represents when the rendering involved will be completed. * * A reference is held on the buffer while on this list. */ struct list_head active_list; /** * LRU list of objects which are not in the ringbuffer and * are ready to unbind, but are still in the GTT. * * last_rendering_seqno is 0 while an object is in this list. * * A reference is not held on the buffer while on this list, * as merely being GTT-bound shouldn't prevent its being * freed, and we'll pull it off the list in the free path. */ struct list_head inactive_list; /* FIXME: Need a more generic return type */ gen6_gtt_pte_t (*pte_encode)(dma_addr_t addr, enum i915_cache_level level, bool valid); /* Create a valid PTE */ void (*clear_range)(struct i915_address_space *vm, uint64_t start, uint64_t length, bool use_scratch); void (*insert_entries)(struct i915_address_space *vm, struct sg_table *st, uint64_t start, enum i915_cache_level cache_level); void (*cleanup)(struct i915_address_space *vm); }; /* The Graphics Translation Table is the way in which GEN hardware translates a * Graphics Virtual Address into a Physical Address. In addition to the normal * collateral associated with any va->pa translations GEN hardware also has a * portion of the GTT which can be mapped by the CPU and remain both coherent * and correct (in cases like swizzling). That region is referred to as GMADR in * the spec. */ struct i915_gtt { struct i915_address_space base; size_t stolen_size; /* Total size of stolen memory */ unsigned long mappable_end; /* End offset that we can CPU map */ struct io_mapping *mappable; /* Mapping to our CPU mappable region */ phys_addr_t mappable_base; /* PA of our GMADR */ /** "Graphics Stolen Memory" holds the global PTEs */ void __iomem *gsm; bool do_idle_maps; int mtrr; /* global gtt ops */ int (*gtt_probe)(struct drm_device *dev, size_t *gtt_total, size_t *stolen, phys_addr_t *mappable_base, unsigned long *mappable_end); }; struct i915_hw_ppgtt { struct i915_address_space base; struct kref ref; struct drm_mm_node node; unsigned num_pd_entries; unsigned num_pd_pages; /* gen8+ */ union { struct page **pt_pages; struct page **gen8_pt_pages[GEN8_LEGACY_PDPS]; }; struct page *pd_pages; union { uint32_t pd_offset; dma_addr_t pd_dma_addr[GEN8_LEGACY_PDPS]; }; union { dma_addr_t *pt_dma_addr; dma_addr_t *gen8_pt_dma_addr[4]; }; struct i915_hw_context *ctx; int (*enable)(struct i915_hw_ppgtt *ppgtt); int (*switch_mm)(struct i915_hw_ppgtt *ppgtt, struct intel_ring_buffer *ring, bool synchronous); void (*debug_dump)(struct i915_hw_ppgtt *ppgtt, struct seq_file *m); }; int i915_gem_gtt_init(struct drm_device *dev); void i915_gem_init_global_gtt(struct drm_device *dev); void i915_gem_setup_global_gtt(struct drm_device *dev, unsigned long start, unsigned long mappable_end, unsigned long end); bool intel_enable_ppgtt(struct drm_device *dev, bool full); int i915_gem_init_ppgtt(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt); void i915_check_and_clear_faults(struct drm_device *dev); void i915_gem_suspend_gtt_mappings(struct drm_device *dev); void i915_gem_restore_gtt_mappings(struct drm_device *dev); int __must_check i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj); void i915_gem_gtt_finish_object(struct drm_i915_gem_object *obj); #endif