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https://github.com/edk2-porting/linux-next.git
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6b9d89b436
In order to support snoopable memory on non-LLC architectures (so that we can bind vgem objects into the i915 GATT for example), we have to avoid the prefetcher on the GPU from crossing memory domains and so prevent allocation of a snoopable PTE immediately following an uncached PTE. To do that, we need to extend the range allocator with support for tracking and segregating different node colours. This will be used by i915 to segregate memory domains within the GTT. v2: Now with more drm_mm helpers and less driver interference. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@redhat.com Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@gmail.com>
252 lines
8.1 KiB
C
252 lines
8.1 KiB
C
/**************************************************************************
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*
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* Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
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* All Rights Reserved.
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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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*
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**************************************************************************/
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/*
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* Authors:
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* Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
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*/
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#ifndef _DRM_MM_H_
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#define _DRM_MM_H_
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/*
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* Generic range manager structs
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*/
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#include <linux/list.h>
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#ifdef CONFIG_DEBUG_FS
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#include <linux/seq_file.h>
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#endif
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struct drm_mm_node {
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struct list_head node_list;
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struct list_head hole_stack;
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unsigned hole_follows : 1;
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unsigned scanned_block : 1;
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unsigned scanned_prev_free : 1;
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unsigned scanned_next_free : 1;
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unsigned scanned_preceeds_hole : 1;
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unsigned allocated : 1;
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unsigned long color;
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unsigned long start;
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unsigned long size;
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struct drm_mm *mm;
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};
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struct drm_mm {
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/* List of all memory nodes that immediately precede a free hole. */
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struct list_head hole_stack;
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/* head_node.node_list is the list of all memory nodes, ordered
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* according to the (increasing) start address of the memory node. */
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struct drm_mm_node head_node;
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struct list_head unused_nodes;
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int num_unused;
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spinlock_t unused_lock;
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unsigned int scan_check_range : 1;
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unsigned scan_alignment;
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unsigned long scan_color;
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unsigned long scan_size;
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unsigned long scan_hit_start;
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unsigned scan_hit_size;
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unsigned scanned_blocks;
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unsigned long scan_start;
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unsigned long scan_end;
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struct drm_mm_node *prev_scanned_node;
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void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
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unsigned long *start, unsigned long *end);
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};
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static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
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{
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return node->allocated;
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}
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static inline bool drm_mm_initialized(struct drm_mm *mm)
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{
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return mm->hole_stack.next;
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}
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#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
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&(mm)->head_node.node_list, \
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node_list)
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#define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
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for (entry = (mm)->prev_scanned_node, \
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next = entry ? list_entry(entry->node_list.next, \
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struct drm_mm_node, node_list) : NULL; \
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entry != NULL; entry = next, \
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next = entry ? list_entry(entry->node_list.next, \
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struct drm_mm_node, node_list) : NULL) \
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/*
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* Basic range manager support (drm_mm.c)
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*/
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extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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int atomic);
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extern struct drm_mm_node *drm_mm_get_block_range_generic(
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struct drm_mm_node *node,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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unsigned long start,
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unsigned long end,
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int atomic);
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static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment)
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{
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return drm_mm_get_block_generic(parent, size, alignment, 0, 0);
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}
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static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment)
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{
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return drm_mm_get_block_generic(parent, size, alignment, 0, 1);
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}
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static inline struct drm_mm_node *drm_mm_get_block_range(
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struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end)
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{
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return drm_mm_get_block_range_generic(parent, size, alignment, 0,
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start, end, 0);
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}
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static inline struct drm_mm_node *drm_mm_get_color_block_range(
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struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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unsigned long start,
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unsigned long end)
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{
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return drm_mm_get_block_range_generic(parent, size, alignment, color,
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start, end, 0);
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}
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static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
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struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end)
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{
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return drm_mm_get_block_range_generic(parent, size, alignment, 0,
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start, end, 1);
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}
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extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
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unsigned long size, unsigned alignment);
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extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
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struct drm_mm_node *node,
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unsigned long size, unsigned alignment,
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unsigned long start, unsigned long end);
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extern void drm_mm_put_block(struct drm_mm_node *cur);
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extern void drm_mm_remove_node(struct drm_mm_node *node);
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extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
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extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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bool best_match);
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extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
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const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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unsigned long start,
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unsigned long end,
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bool best_match);
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static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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bool best_match)
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{
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return drm_mm_search_free_generic(mm,size, alignment, 0, best_match);
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}
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static inline struct drm_mm_node *drm_mm_search_free_in_range(
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const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end,
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bool best_match)
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{
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return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
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start, end, best_match);
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}
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static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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bool best_match)
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{
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return drm_mm_search_free_generic(mm,size, alignment, color, best_match);
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}
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static inline struct drm_mm_node *drm_mm_search_free_in_range_color(
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const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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unsigned long start,
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unsigned long end,
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bool best_match)
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{
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return drm_mm_search_free_in_range_generic(mm, size, alignment, color,
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start, end, best_match);
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}
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extern int drm_mm_init(struct drm_mm *mm,
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unsigned long start,
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unsigned long size);
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extern void drm_mm_takedown(struct drm_mm *mm);
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extern int drm_mm_clean(struct drm_mm *mm);
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extern int drm_mm_pre_get(struct drm_mm *mm);
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static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
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{
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return block->mm;
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}
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void drm_mm_init_scan(struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color);
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void drm_mm_init_scan_with_range(struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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unsigned long start,
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unsigned long end);
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int drm_mm_scan_add_block(struct drm_mm_node *node);
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int drm_mm_scan_remove_block(struct drm_mm_node *node);
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extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
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#ifdef CONFIG_DEBUG_FS
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int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
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#endif
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#endif
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