424 lines
12 KiB
C
424 lines
12 KiB
C
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/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef __I915_VMA_H__
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#define __I915_VMA_H__
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#include <linux/io-mapping.h>
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#include <linux/rbtree.h>
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#include <drm/drm_mm.h>
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#include "i915_gem_gtt.h"
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#include "i915_gem_fence_reg.h"
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#include "i915_gem_object.h"
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#include "i915_request.h"
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enum i915_cache_level;
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/**
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* A VMA represents a GEM BO that is bound into an address space. Therefore, a
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* VMA's presence cannot be guaranteed before binding, or after unbinding the
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* object into/from the address space.
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*
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* To make things as simple as possible (ie. no refcounting), a VMA's lifetime
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* will always be <= an objects lifetime. So object refcounting should cover us.
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*/
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struct i915_vma {
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struct drm_mm_node node;
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struct drm_i915_gem_object *obj;
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struct i915_address_space *vm;
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const struct i915_vma_ops *ops;
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struct drm_i915_fence_reg *fence;
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struct reservation_object *resv; /** Alias of obj->resv */
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struct sg_table *pages;
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void __iomem *iomap;
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void *private; /* owned by creator */
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u64 size;
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u64 display_alignment;
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struct i915_page_sizes page_sizes;
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u32 fence_size;
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u32 fence_alignment;
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/**
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* Count of the number of times this vma has been opened by different
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* handles (but same file) for execbuf, i.e. the number of aliases
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* that exist in the ctx->handle_vmas LUT for this vma.
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*/
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unsigned int open_count;
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unsigned long flags;
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/**
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* How many users have pinned this object in GTT space. The following
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* users can each hold at most one reference: pwrite/pread, execbuffer
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* (objects are not allowed multiple times for the same batchbuffer),
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* and the framebuffer code. When switching/pageflipping, the
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* framebuffer code has at most two buffers pinned per crtc.
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*
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* In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
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* bits with absolutely no headroom. So use 4 bits.
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*/
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#define I915_VMA_PIN_MASK 0xf
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#define I915_VMA_PIN_OVERFLOW BIT(5)
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/** Flags and address space this VMA is bound to */
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#define I915_VMA_GLOBAL_BIND BIT(6)
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#define I915_VMA_LOCAL_BIND BIT(7)
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#define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND | I915_VMA_PIN_OVERFLOW)
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#define I915_VMA_GGTT BIT(8)
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#define I915_VMA_CAN_FENCE BIT(9)
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#define I915_VMA_CLOSED BIT(10)
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#define I915_VMA_USERFAULT_BIT 11
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#define I915_VMA_USERFAULT BIT(I915_VMA_USERFAULT_BIT)
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#define I915_VMA_GGTT_WRITE BIT(12)
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unsigned int active_count;
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struct rb_root active;
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struct i915_gem_active last_active;
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struct i915_gem_active last_fence;
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/**
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* Support different GGTT views into the same object.
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* This means there can be multiple VMA mappings per object and per VM.
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* i915_ggtt_view_type is used to distinguish between those entries.
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* The default one of zero (I915_GGTT_VIEW_NORMAL) is default and also
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* assumed in GEM functions which take no ggtt view parameter.
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*/
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struct i915_ggtt_view ggtt_view;
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/** This object's place on the active/inactive lists */
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struct list_head vm_link;
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struct list_head obj_link; /* Link in the object's VMA list */
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struct rb_node obj_node;
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struct hlist_node obj_hash;
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/** This vma's place in the execbuf reservation list */
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struct list_head exec_link;
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struct list_head reloc_link;
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/** This vma's place in the eviction list */
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struct list_head evict_link;
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struct list_head closed_link;
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/**
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* Used for performing relocations during execbuffer insertion.
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*/
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unsigned int *exec_flags;
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struct hlist_node exec_node;
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u32 exec_handle;
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};
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struct i915_vma *
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i915_vma_instance(struct drm_i915_gem_object *obj,
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struct i915_address_space *vm,
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const struct i915_ggtt_view *view);
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void i915_vma_unpin_and_release(struct i915_vma **p_vma);
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static inline bool i915_vma_is_active(struct i915_vma *vma)
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{
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return vma->active_count;
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}
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int __must_check i915_vma_move_to_active(struct i915_vma *vma,
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struct i915_request *rq,
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unsigned int flags);
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static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
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{
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return vma->flags & I915_VMA_GGTT;
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}
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static inline bool i915_vma_has_ggtt_write(const struct i915_vma *vma)
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{
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return vma->flags & I915_VMA_GGTT_WRITE;
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}
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static inline void i915_vma_set_ggtt_write(struct i915_vma *vma)
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{
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GEM_BUG_ON(!i915_vma_is_ggtt(vma));
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vma->flags |= I915_VMA_GGTT_WRITE;
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}
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static inline void i915_vma_unset_ggtt_write(struct i915_vma *vma)
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{
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vma->flags &= ~I915_VMA_GGTT_WRITE;
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}
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void i915_vma_flush_writes(struct i915_vma *vma);
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static inline bool i915_vma_is_map_and_fenceable(const struct i915_vma *vma)
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{
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return vma->flags & I915_VMA_CAN_FENCE;
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}
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static inline bool i915_vma_is_closed(const struct i915_vma *vma)
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{
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return vma->flags & I915_VMA_CLOSED;
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}
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static inline bool i915_vma_set_userfault(struct i915_vma *vma)
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{
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GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma));
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return __test_and_set_bit(I915_VMA_USERFAULT_BIT, &vma->flags);
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}
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static inline void i915_vma_unset_userfault(struct i915_vma *vma)
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{
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return __clear_bit(I915_VMA_USERFAULT_BIT, &vma->flags);
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}
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static inline bool i915_vma_has_userfault(const struct i915_vma *vma)
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{
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return test_bit(I915_VMA_USERFAULT_BIT, &vma->flags);
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}
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static inline u32 i915_ggtt_offset(const struct i915_vma *vma)
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{
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GEM_BUG_ON(!i915_vma_is_ggtt(vma));
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GEM_BUG_ON(!vma->node.allocated);
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GEM_BUG_ON(upper_32_bits(vma->node.start));
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GEM_BUG_ON(upper_32_bits(vma->node.start + vma->node.size - 1));
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return lower_32_bits(vma->node.start);
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}
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static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
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{
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i915_gem_object_get(vma->obj);
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return vma;
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}
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static inline void i915_vma_put(struct i915_vma *vma)
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{
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i915_gem_object_put(vma->obj);
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}
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static __always_inline ptrdiff_t ptrdiff(const void *a, const void *b)
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{
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return a - b;
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}
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static inline long
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i915_vma_compare(struct i915_vma *vma,
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struct i915_address_space *vm,
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const struct i915_ggtt_view *view)
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{
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ptrdiff_t cmp;
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GEM_BUG_ON(view && !i915_is_ggtt(vm));
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cmp = ptrdiff(vma->vm, vm);
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if (cmp)
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return cmp;
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BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL != 0);
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cmp = vma->ggtt_view.type;
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if (!view)
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return cmp;
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cmp -= view->type;
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if (cmp)
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return cmp;
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/* ggtt_view.type also encodes its size so that we both distinguish
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* different views using it as a "type" and also use a compact (no
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* accessing of uninitialised padding bytes) memcmp without storing
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* an extra parameter or adding more code.
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*
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* To ensure that the memcmp is valid for all branches of the union,
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* even though the code looks like it is just comparing one branch,
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* we assert above that all branches have the same address, and that
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* each branch has a unique type/size.
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*/
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BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL >= I915_GGTT_VIEW_PARTIAL);
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BUILD_BUG_ON(I915_GGTT_VIEW_PARTIAL >= I915_GGTT_VIEW_ROTATED);
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BUILD_BUG_ON(offsetof(typeof(*view), rotated) !=
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offsetof(typeof(*view), partial));
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return memcmp(&vma->ggtt_view.partial, &view->partial, view->type);
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}
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int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
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u32 flags);
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bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level);
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bool i915_vma_misplaced(const struct i915_vma *vma,
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u64 size, u64 alignment, u64 flags);
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void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
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void i915_vma_revoke_mmap(struct i915_vma *vma);
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int __must_check i915_vma_unbind(struct i915_vma *vma);
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void i915_vma_unlink_ctx(struct i915_vma *vma);
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void i915_vma_close(struct i915_vma *vma);
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void i915_vma_reopen(struct i915_vma *vma);
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void i915_vma_destroy(struct i915_vma *vma);
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int __i915_vma_do_pin(struct i915_vma *vma,
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u64 size, u64 alignment, u64 flags);
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static inline int __must_check
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i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
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{
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BUILD_BUG_ON(PIN_MBZ != I915_VMA_PIN_OVERFLOW);
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BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);
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BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND);
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/* Pin early to prevent the shrinker/eviction logic from destroying
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* our vma as we insert and bind.
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*/
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if (likely(((++vma->flags ^ flags) & I915_VMA_BIND_MASK) == 0)) {
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GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
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GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
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return 0;
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}
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return __i915_vma_do_pin(vma, size, alignment, flags);
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}
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static inline int i915_vma_pin_count(const struct i915_vma *vma)
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{
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return vma->flags & I915_VMA_PIN_MASK;
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}
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static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
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{
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return i915_vma_pin_count(vma);
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}
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static inline void __i915_vma_pin(struct i915_vma *vma)
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{
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vma->flags++;
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GEM_BUG_ON(vma->flags & I915_VMA_PIN_OVERFLOW);
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}
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static inline void __i915_vma_unpin(struct i915_vma *vma)
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{
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vma->flags--;
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}
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static inline void i915_vma_unpin(struct i915_vma *vma)
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{
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GEM_BUG_ON(!i915_vma_is_pinned(vma));
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GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
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__i915_vma_unpin(vma);
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}
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static inline bool i915_vma_is_bound(const struct i915_vma *vma,
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unsigned int where)
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{
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return vma->flags & where;
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}
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/**
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* i915_vma_pin_iomap - calls ioremap_wc to map the GGTT VMA via the aperture
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* @vma: VMA to iomap
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*
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* The passed in VMA has to be pinned in the global GTT mappable region.
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* An extra pinning of the VMA is acquired for the return iomapping,
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* the caller must call i915_vma_unpin_iomap to relinquish the pinning
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* after the iomapping is no longer required.
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*
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* Callers must hold the struct_mutex.
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*
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* Returns a valid iomapped pointer or ERR_PTR.
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*/
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void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
|
||
|
|
#define IO_ERR_PTR(x) ((void __iomem *)ERR_PTR(x))
|
||
|
|
|
||
|
|
/**
|
||
|
|
* i915_vma_unpin_iomap - unpins the mapping returned from i915_vma_iomap
|
||
|
|
* @vma: VMA to unpin
|
||
|
|
*
|
||
|
|
* Unpins the previously iomapped VMA from i915_vma_pin_iomap().
|
||
|
|
*
|
||
|
|
* Callers must hold the struct_mutex. This function is only valid to be
|
||
|
|
* called on a VMA previously iomapped by the caller with i915_vma_pin_iomap().
|
||
|
|
*/
|
||
|
|
void i915_vma_unpin_iomap(struct i915_vma *vma);
|
||
|
|
|
||
|
|
static inline struct page *i915_vma_first_page(struct i915_vma *vma)
|
||
|
|
{
|
||
|
|
GEM_BUG_ON(!vma->pages);
|
||
|
|
return sg_page(vma->pages->sgl);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* i915_vma_pin_fence - pin fencing state
|
||
|
|
* @vma: vma to pin fencing for
|
||
|
|
*
|
||
|
|
* This pins the fencing state (whether tiled or untiled) to make sure the
|
||
|
|
* vma (and its object) is ready to be used as a scanout target. Fencing
|
||
|
|
* status must be synchronize first by calling i915_vma_get_fence():
|
||
|
|
*
|
||
|
|
* The resulting fence pin reference must be released again with
|
||
|
|
* i915_vma_unpin_fence().
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
*
|
||
|
|
* True if the vma has a fence, false otherwise.
|
||
|
|
*/
|
||
|
|
int i915_vma_pin_fence(struct i915_vma *vma);
|
||
|
|
int __must_check i915_vma_put_fence(struct i915_vma *vma);
|
||
|
|
|
||
|
|
static inline void __i915_vma_unpin_fence(struct i915_vma *vma)
|
||
|
|
{
|
||
|
|
GEM_BUG_ON(vma->fence->pin_count <= 0);
|
||
|
|
vma->fence->pin_count--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* i915_vma_unpin_fence - unpin fencing state
|
||
|
|
* @vma: vma to unpin fencing for
|
||
|
|
*
|
||
|
|
* This releases the fence pin reference acquired through
|
||
|
|
* i915_vma_pin_fence. It will handle both objects with and without an
|
||
|
|
* attached fence correctly, callers do not need to distinguish this.
|
||
|
|
*/
|
||
|
|
static inline void
|
||
|
|
i915_vma_unpin_fence(struct i915_vma *vma)
|
||
|
|
{
|
||
|
|
/* lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); */
|
||
|
|
if (vma->fence)
|
||
|
|
__i915_vma_unpin_fence(vma);
|
||
|
|
}
|
||
|
|
|
||
|
|
void i915_vma_parked(struct drm_i915_private *i915);
|
||
|
|
|
||
|
|
#define for_each_until(cond) if (cond) break; else
|
||
|
|
|
||
|
|
/**
|
||
|
|
* for_each_ggtt_vma - Iterate over the GGTT VMA belonging to an object.
|
||
|
|
* @V: the #i915_vma iterator
|
||
|
|
* @OBJ: the #drm_i915_gem_object
|
||
|
|
*
|
||
|
|
* GGTT VMA are placed at the being of the object's vma_list, see
|
||
|
|
* vma_create(), so we can stop our walk as soon as we see a ppgtt VMA,
|
||
|
|
* or the list is empty ofc.
|
||
|
|
*/
|
||
|
|
#define for_each_ggtt_vma(V, OBJ) \
|
||
|
|
list_for_each_entry(V, &(OBJ)->vma_list, obj_link) \
|
||
|
|
for_each_until(!i915_vma_is_ggtt(V))
|
||
|
|
|
||
|
|
#endif
|