429 lines
13 KiB
C
429 lines
13 KiB
C
/*
|
|
* Copyright 2020 Advanced Micro Devices, Inc.
|
|
*
|
|
* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
|
|
*
|
|
* Authors: Christian König
|
|
*/
|
|
|
|
#ifndef _TTM_RESOURCE_H_
|
|
#define _TTM_RESOURCE_H_
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/iosys-map.h>
|
|
#include <linux/dma-fence.h>
|
|
|
|
#include <drm/drm_print.h>
|
|
#include <drm/ttm/ttm_caching.h>
|
|
#include <drm/ttm/ttm_kmap_iter.h>
|
|
|
|
#define TTM_MAX_BO_PRIORITY 4U
|
|
#define TTM_NUM_MEM_TYPES 8
|
|
|
|
struct ttm_device;
|
|
struct ttm_resource_manager;
|
|
struct ttm_resource;
|
|
struct ttm_place;
|
|
struct ttm_buffer_object;
|
|
struct ttm_placement;
|
|
struct iosys_map;
|
|
struct io_mapping;
|
|
struct sg_table;
|
|
struct scatterlist;
|
|
|
|
struct ttm_resource_manager_func {
|
|
/**
|
|
* struct ttm_resource_manager_func member alloc
|
|
*
|
|
* @man: Pointer to a memory type manager.
|
|
* @bo: Pointer to the buffer object we're allocating space for.
|
|
* @place: Placement details.
|
|
* @res: Resulting pointer to the ttm_resource.
|
|
*
|
|
* This function should allocate space in the memory type managed
|
|
* by @man. Placement details if applicable are given by @place. If
|
|
* successful, a filled in ttm_resource object should be returned in
|
|
* @res. @res::start should be set to a value identifying the beginning
|
|
* of the range allocated, and the function should return zero.
|
|
* If the manager can't fulfill the request -ENOSPC should be returned.
|
|
* If a system error occurred, preventing the request to be fulfilled,
|
|
* the function should return a negative error code.
|
|
*
|
|
* This function may not be called from within atomic context and needs
|
|
* to take care of its own locking to protect any data structures
|
|
* managing the space.
|
|
*/
|
|
int (*alloc)(struct ttm_resource_manager *man,
|
|
struct ttm_buffer_object *bo,
|
|
const struct ttm_place *place,
|
|
struct ttm_resource **res);
|
|
|
|
/**
|
|
* struct ttm_resource_manager_func member free
|
|
*
|
|
* @man: Pointer to a memory type manager.
|
|
* @res: Pointer to a struct ttm_resource to be freed.
|
|
*
|
|
* This function frees memory type resources previously allocated.
|
|
* May not be called from within atomic context.
|
|
*/
|
|
void (*free)(struct ttm_resource_manager *man,
|
|
struct ttm_resource *res);
|
|
|
|
/**
|
|
* struct ttm_resource_manager_func member intersects
|
|
*
|
|
* @man: Pointer to a memory type manager.
|
|
* @res: Pointer to a struct ttm_resource to be checked.
|
|
* @place: Placement to check against.
|
|
* @size: Size of the check.
|
|
*
|
|
* Test if @res intersects with @place + @size. Used to judge if
|
|
* evictions are valueable or not.
|
|
*/
|
|
bool (*intersects)(struct ttm_resource_manager *man,
|
|
struct ttm_resource *res,
|
|
const struct ttm_place *place,
|
|
size_t size);
|
|
|
|
/**
|
|
* struct ttm_resource_manager_func member compatible
|
|
*
|
|
* @man: Pointer to a memory type manager.
|
|
* @res: Pointer to a struct ttm_resource to be checked.
|
|
* @place: Placement to check against.
|
|
* @size: Size of the check.
|
|
*
|
|
* Test if @res compatible with @place + @size. Used to check of
|
|
* the need to move the backing store or not.
|
|
*/
|
|
bool (*compatible)(struct ttm_resource_manager *man,
|
|
struct ttm_resource *res,
|
|
const struct ttm_place *place,
|
|
size_t size);
|
|
|
|
/**
|
|
* struct ttm_resource_manager_func member debug
|
|
*
|
|
* @man: Pointer to a memory type manager.
|
|
* @printer: Prefix to be used in printout to identify the caller.
|
|
*
|
|
* This function is called to print out the state of the memory
|
|
* type manager to aid debugging of out-of-memory conditions.
|
|
* It may not be called from within atomic context.
|
|
*/
|
|
void (*debug)(struct ttm_resource_manager *man,
|
|
struct drm_printer *printer);
|
|
};
|
|
|
|
/**
|
|
* struct ttm_resource_manager
|
|
*
|
|
* @use_type: The memory type is enabled.
|
|
* @use_tt: If a TT object should be used for the backing store.
|
|
* @size: Size of the managed region.
|
|
* @bdev: ttm device this manager belongs to
|
|
* @func: structure pointer implementing the range manager. See above
|
|
* @move_lock: lock for move fence
|
|
* @move: The fence of the last pipelined move operation.
|
|
* @lru: The lru list for this memory type.
|
|
*
|
|
* This structure is used to identify and manage memory types for a device.
|
|
*/
|
|
struct ttm_resource_manager {
|
|
/*
|
|
* No protection. Constant from start.
|
|
*/
|
|
bool use_type;
|
|
bool use_tt;
|
|
struct ttm_device *bdev;
|
|
uint64_t size;
|
|
const struct ttm_resource_manager_func *func;
|
|
spinlock_t move_lock;
|
|
|
|
/*
|
|
* Protected by @move_lock.
|
|
*/
|
|
struct dma_fence *move;
|
|
|
|
/*
|
|
* Protected by the bdev->lru_lock.
|
|
*/
|
|
struct list_head lru[TTM_MAX_BO_PRIORITY];
|
|
|
|
/**
|
|
* @usage: How much of the resources are used, protected by the
|
|
* bdev->lru_lock.
|
|
*/
|
|
uint64_t usage;
|
|
};
|
|
|
|
/**
|
|
* struct ttm_bus_placement
|
|
*
|
|
* @addr: mapped virtual address
|
|
* @offset: physical addr
|
|
* @is_iomem: is this io memory ?
|
|
* @caching: See enum ttm_caching
|
|
*
|
|
* Structure indicating the bus placement of an object.
|
|
*/
|
|
struct ttm_bus_placement {
|
|
void *addr;
|
|
phys_addr_t offset;
|
|
bool is_iomem;
|
|
enum ttm_caching caching;
|
|
};
|
|
|
|
/**
|
|
* struct ttm_resource
|
|
*
|
|
* @start: Start of the allocation.
|
|
* @size: Actual size of resource in bytes.
|
|
* @mem_type: Resource type of the allocation.
|
|
* @placement: Placement flags.
|
|
* @bus: Placement on io bus accessible to the CPU
|
|
* @bo: weak reference to the BO, protected by ttm_device::lru_lock
|
|
*
|
|
* Structure indicating the placement and space resources used by a
|
|
* buffer object.
|
|
*/
|
|
struct ttm_resource {
|
|
unsigned long start;
|
|
size_t size;
|
|
uint32_t mem_type;
|
|
uint32_t placement;
|
|
struct ttm_bus_placement bus;
|
|
struct ttm_buffer_object *bo;
|
|
|
|
/**
|
|
* @lru: Least recently used list, see &ttm_resource_manager.lru
|
|
*/
|
|
struct list_head lru;
|
|
};
|
|
|
|
/**
|
|
* struct ttm_resource_cursor
|
|
*
|
|
* @priority: the current priority
|
|
*
|
|
* Cursor to iterate over the resources in a manager.
|
|
*/
|
|
struct ttm_resource_cursor {
|
|
unsigned int priority;
|
|
};
|
|
|
|
/**
|
|
* struct ttm_lru_bulk_move_pos
|
|
*
|
|
* @first: first res in the bulk move range
|
|
* @last: last res in the bulk move range
|
|
*
|
|
* Range of resources for a lru bulk move.
|
|
*/
|
|
struct ttm_lru_bulk_move_pos {
|
|
struct ttm_resource *first;
|
|
struct ttm_resource *last;
|
|
};
|
|
|
|
/**
|
|
* struct ttm_lru_bulk_move
|
|
*
|
|
* @pos: first/last lru entry for resources in the each domain/priority
|
|
*
|
|
* Container for the current bulk move state. Should be used with
|
|
* ttm_lru_bulk_move_init() and ttm_bo_set_bulk_move().
|
|
*/
|
|
struct ttm_lru_bulk_move {
|
|
struct ttm_lru_bulk_move_pos pos[TTM_NUM_MEM_TYPES][TTM_MAX_BO_PRIORITY];
|
|
};
|
|
|
|
/**
|
|
* struct ttm_kmap_iter_iomap - Specialization for a struct io_mapping +
|
|
* struct sg_table backed struct ttm_resource.
|
|
* @base: Embedded struct ttm_kmap_iter providing the usage interface.
|
|
* @iomap: struct io_mapping representing the underlying linear io_memory.
|
|
* @st: sg_table into @iomap, representing the memory of the struct ttm_resource.
|
|
* @start: Offset that needs to be subtracted from @st to make
|
|
* sg_dma_address(st->sgl) - @start == 0 for @iomap start.
|
|
* @cache: Scatterlist traversal cache for fast lookups.
|
|
* @cache.sg: Pointer to the currently cached scatterlist segment.
|
|
* @cache.i: First index of @sg. PAGE_SIZE granularity.
|
|
* @cache.end: Last index + 1 of @sg. PAGE_SIZE granularity.
|
|
* @cache.offs: First offset into @iomap of @sg. PAGE_SIZE granularity.
|
|
*/
|
|
struct ttm_kmap_iter_iomap {
|
|
struct ttm_kmap_iter base;
|
|
struct io_mapping *iomap;
|
|
struct sg_table *st;
|
|
resource_size_t start;
|
|
struct {
|
|
struct scatterlist *sg;
|
|
pgoff_t i;
|
|
pgoff_t end;
|
|
pgoff_t offs;
|
|
} cache;
|
|
};
|
|
|
|
/**
|
|
* struct ttm_kmap_iter_linear_io - Iterator specialization for linear io
|
|
* @base: The base iterator
|
|
* @dmap: Points to the starting address of the region
|
|
* @needs_unmap: Whether we need to unmap on fini
|
|
*/
|
|
struct ttm_kmap_iter_linear_io {
|
|
struct ttm_kmap_iter base;
|
|
struct iosys_map dmap;
|
|
bool needs_unmap;
|
|
};
|
|
|
|
/**
|
|
* ttm_resource_manager_set_used
|
|
*
|
|
* @man: A memory manager object.
|
|
* @used: usage state to set.
|
|
*
|
|
* Set the manager in use flag. If disabled the manager is no longer
|
|
* used for object placement.
|
|
*/
|
|
static inline void
|
|
ttm_resource_manager_set_used(struct ttm_resource_manager *man, bool used)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < TTM_MAX_BO_PRIORITY; i++)
|
|
WARN_ON(!list_empty(&man->lru[i]));
|
|
man->use_type = used;
|
|
}
|
|
|
|
/**
|
|
* ttm_resource_manager_used
|
|
*
|
|
* @man: Manager to get used state for
|
|
*
|
|
* Get the in use flag for a manager.
|
|
* Returns:
|
|
* true is used, false if not.
|
|
*/
|
|
static inline bool ttm_resource_manager_used(struct ttm_resource_manager *man)
|
|
{
|
|
return man->use_type;
|
|
}
|
|
|
|
/**
|
|
* ttm_resource_manager_cleanup
|
|
*
|
|
* @man: A memory manager object.
|
|
*
|
|
* Cleanup the move fences from the memory manager object.
|
|
*/
|
|
static inline void
|
|
ttm_resource_manager_cleanup(struct ttm_resource_manager *man)
|
|
{
|
|
dma_fence_put(man->move);
|
|
man->move = NULL;
|
|
}
|
|
|
|
void ttm_lru_bulk_move_init(struct ttm_lru_bulk_move *bulk);
|
|
void ttm_lru_bulk_move_tail(struct ttm_lru_bulk_move *bulk);
|
|
|
|
void ttm_resource_add_bulk_move(struct ttm_resource *res,
|
|
struct ttm_buffer_object *bo);
|
|
void ttm_resource_del_bulk_move(struct ttm_resource *res,
|
|
struct ttm_buffer_object *bo);
|
|
void ttm_resource_move_to_lru_tail(struct ttm_resource *res);
|
|
|
|
void ttm_resource_init(struct ttm_buffer_object *bo,
|
|
const struct ttm_place *place,
|
|
struct ttm_resource *res);
|
|
void ttm_resource_fini(struct ttm_resource_manager *man,
|
|
struct ttm_resource *res);
|
|
|
|
int ttm_resource_alloc(struct ttm_buffer_object *bo,
|
|
const struct ttm_place *place,
|
|
struct ttm_resource **res);
|
|
void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res);
|
|
bool ttm_resource_intersects(struct ttm_device *bdev,
|
|
struct ttm_resource *res,
|
|
const struct ttm_place *place,
|
|
size_t size);
|
|
bool ttm_resource_compatible(struct ttm_device *bdev,
|
|
struct ttm_resource *res,
|
|
const struct ttm_place *place,
|
|
size_t size);
|
|
bool ttm_resource_compat(struct ttm_resource *res,
|
|
struct ttm_placement *placement);
|
|
void ttm_resource_set_bo(struct ttm_resource *res,
|
|
struct ttm_buffer_object *bo);
|
|
|
|
void ttm_resource_manager_init(struct ttm_resource_manager *man,
|
|
struct ttm_device *bdev,
|
|
uint64_t size);
|
|
|
|
int ttm_resource_manager_evict_all(struct ttm_device *bdev,
|
|
struct ttm_resource_manager *man);
|
|
|
|
uint64_t ttm_resource_manager_usage(struct ttm_resource_manager *man);
|
|
void ttm_resource_manager_debug(struct ttm_resource_manager *man,
|
|
struct drm_printer *p);
|
|
|
|
struct ttm_resource *
|
|
ttm_resource_manager_first(struct ttm_resource_manager *man,
|
|
struct ttm_resource_cursor *cursor);
|
|
struct ttm_resource *
|
|
ttm_resource_manager_next(struct ttm_resource_manager *man,
|
|
struct ttm_resource_cursor *cursor,
|
|
struct ttm_resource *res);
|
|
|
|
/**
|
|
* ttm_resource_manager_for_each_res - iterate over all resources
|
|
* @man: the resource manager
|
|
* @cursor: struct ttm_resource_cursor for the current position
|
|
* @res: the current resource
|
|
*
|
|
* Iterate over all the evictable resources in a resource manager.
|
|
*/
|
|
#define ttm_resource_manager_for_each_res(man, cursor, res) \
|
|
for (res = ttm_resource_manager_first(man, cursor); res; \
|
|
res = ttm_resource_manager_next(man, cursor, res))
|
|
|
|
struct ttm_kmap_iter *
|
|
ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io,
|
|
struct io_mapping *iomap,
|
|
struct sg_table *st,
|
|
resource_size_t start);
|
|
|
|
struct ttm_kmap_iter_linear_io;
|
|
|
|
struct ttm_kmap_iter *
|
|
ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
|
|
struct ttm_device *bdev,
|
|
struct ttm_resource *mem);
|
|
|
|
void ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
|
|
struct ttm_device *bdev,
|
|
struct ttm_resource *mem);
|
|
|
|
void ttm_resource_manager_create_debugfs(struct ttm_resource_manager *man,
|
|
struct dentry * parent,
|
|
const char *name);
|
|
#endif
|