WSL2-Linux-Kernel/include/drm/ttm/ttm_resource.h

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/*
* 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>
dma-buf-map: Rename to iosys-map Rename struct dma_buf_map to struct iosys_map and corresponding APIs. Over time dma-buf-map grew up to more functionality than the one used by dma-buf: in fact it's just a shim layer to abstract system memory, that can be accessed via regular load and store, from IO memory that needs to be acessed via arch helpers. The idea is to extend this API so it can fulfill other needs, internal to a single driver. Example: in the i915 driver it's desired to share the implementation for integrated graphics, which uses mostly system memory, with discrete graphics, which may need to access IO memory. The conversion was mostly done with the following semantic patch: @r1@ @@ - struct dma_buf_map + struct iosys_map @r2@ @@ ( - DMA_BUF_MAP_INIT_VADDR + IOSYS_MAP_INIT_VADDR | - dma_buf_map_set_vaddr + iosys_map_set_vaddr | - dma_buf_map_set_vaddr_iomem + iosys_map_set_vaddr_iomem | - dma_buf_map_is_equal + iosys_map_is_equal | - dma_buf_map_is_null + iosys_map_is_null | - dma_buf_map_is_set + iosys_map_is_set | - dma_buf_map_clear + iosys_map_clear | - dma_buf_map_memcpy_to + iosys_map_memcpy_to | - dma_buf_map_incr + iosys_map_incr ) @@ @@ - #include <linux/dma-buf-map.h> + #include <linux/iosys-map.h> Then some files had their includes adjusted and some comments were update to remove mentions to dma-buf-map. Since this is not specific to dma-buf anymore, move the documentation to the "Bus-Independent Device Accesses" section. v2: - Squash patches v3: - Fix wrong removal of dma-buf.h from MAINTAINERS - Move documentation from dma-buf.rst to device-io.rst v4: - Change documentation title and level Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20220204170541.829227-1-lucas.demarchi@intel.com
2022-02-04 20:05:41 +03:00
#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;
dma-buf-map: Rename to iosys-map Rename struct dma_buf_map to struct iosys_map and corresponding APIs. Over time dma-buf-map grew up to more functionality than the one used by dma-buf: in fact it's just a shim layer to abstract system memory, that can be accessed via regular load and store, from IO memory that needs to be acessed via arch helpers. The idea is to extend this API so it can fulfill other needs, internal to a single driver. Example: in the i915 driver it's desired to share the implementation for integrated graphics, which uses mostly system memory, with discrete graphics, which may need to access IO memory. The conversion was mostly done with the following semantic patch: @r1@ @@ - struct dma_buf_map + struct iosys_map @r2@ @@ ( - DMA_BUF_MAP_INIT_VADDR + IOSYS_MAP_INIT_VADDR | - dma_buf_map_set_vaddr + iosys_map_set_vaddr | - dma_buf_map_set_vaddr_iomem + iosys_map_set_vaddr_iomem | - dma_buf_map_is_equal + iosys_map_is_equal | - dma_buf_map_is_null + iosys_map_is_null | - dma_buf_map_is_set + iosys_map_is_set | - dma_buf_map_clear + iosys_map_clear | - dma_buf_map_memcpy_to + iosys_map_memcpy_to | - dma_buf_map_incr + iosys_map_incr ) @@ @@ - #include <linux/dma-buf-map.h> + #include <linux/iosys-map.h> Then some files had their includes adjusted and some comments were update to remove mentions to dma-buf-map. Since this is not specific to dma-buf anymore, move the documentation to the "Bus-Independent Device Accesses" section. v2: - Squash patches v3: - Fix wrong removal of dma-buf.h from MAINTAINERS - Move documentation from dma-buf.rst to device-io.rst v4: - Change documentation title and level Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20220204170541.829227-1-lucas.demarchi@intel.com
2022-02-04 20:05:41 +03:00
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;
dma-buf-map: Rename to iosys-map Rename struct dma_buf_map to struct iosys_map and corresponding APIs. Over time dma-buf-map grew up to more functionality than the one used by dma-buf: in fact it's just a shim layer to abstract system memory, that can be accessed via regular load and store, from IO memory that needs to be acessed via arch helpers. The idea is to extend this API so it can fulfill other needs, internal to a single driver. Example: in the i915 driver it's desired to share the implementation for integrated graphics, which uses mostly system memory, with discrete graphics, which may need to access IO memory. The conversion was mostly done with the following semantic patch: @r1@ @@ - struct dma_buf_map + struct iosys_map @r2@ @@ ( - DMA_BUF_MAP_INIT_VADDR + IOSYS_MAP_INIT_VADDR | - dma_buf_map_set_vaddr + iosys_map_set_vaddr | - dma_buf_map_set_vaddr_iomem + iosys_map_set_vaddr_iomem | - dma_buf_map_is_equal + iosys_map_is_equal | - dma_buf_map_is_null + iosys_map_is_null | - dma_buf_map_is_set + iosys_map_is_set | - dma_buf_map_clear + iosys_map_clear | - dma_buf_map_memcpy_to + iosys_map_memcpy_to | - dma_buf_map_incr + iosys_map_incr ) @@ @@ - #include <linux/dma-buf-map.h> + #include <linux/iosys-map.h> Then some files had their includes adjusted and some comments were update to remove mentions to dma-buf-map. Since this is not specific to dma-buf anymore, move the documentation to the "Bus-Independent Device Accesses" section. v2: - Squash patches v3: - Fix wrong removal of dma-buf.h from MAINTAINERS - Move documentation from dma-buf.rst to device-io.rst v4: - Change documentation title and level Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20220204170541.829227-1-lucas.demarchi@intel.com
2022-02-04 20:05:41 +03:00
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