diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_free_list.h')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_free_list.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_free_list.h b/drivers/gpu/drm/imagination/pvr_free_list.h new file mode 100644 index 000000000..bfb4f5fc6 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_free_list.h @@ -0,0 +1,195 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_FREE_LIST_H +#define PVR_FREE_LIST_H + +#include <linux/compiler_attributes.h> +#include <linux/kref.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/types.h> +#include <linux/xarray.h> +#include <uapi/drm/pvr_drm.h> + +#include "pvr_device.h" + +/* Forward declaration from pvr_gem.h. */ +struct pvr_fw_object; + +/* Forward declaration from pvr_gem.h. */ +struct pvr_gem_object; + +/* Forward declaration from pvr_hwrt.h. */ +struct pvr_hwrt_data; + +/** + * struct pvr_free_list_node - structure representing an allocation in the free + * list + */ +struct pvr_free_list_node { + /** @node: List node for &pvr_free_list.mem_block_list. */ + struct list_head node; + + /** @free_list: Pointer to owning free list. */ + struct pvr_free_list *free_list; + + /** @num_pages: Number of pages in this node. */ + u32 num_pages; + + /** @mem_obj: GEM object representing the pages in this node. */ + struct pvr_gem_object *mem_obj; +}; + +/** + * struct pvr_free_list - structure representing a free list + */ +struct pvr_free_list { + /** @ref_count: Reference count of object. */ + struct kref ref_count; + + /** @pvr_dev: Pointer to device that owns this object. */ + struct pvr_device *pvr_dev; + + /** @obj: GEM object representing the free list. */ + struct pvr_gem_object *obj; + + /** @fw_obj: FW object representing the FW-side structure. */ + struct pvr_fw_object *fw_obj; + + /** @fw_data: Pointer to CPU mapping of the FW-side structure. */ + struct rogue_fwif_freelist *fw_data; + + /** + * @lock: Mutex protecting modification of the free list. Must be held when accessing any + * of the members below. + */ + struct mutex lock; + + /** @fw_id: Firmware ID for this object. */ + u32 fw_id; + + /** @current_pages: Current number of pages in free list. */ + u32 current_pages; + + /** @max_pages: Maximum number of pages in free list. */ + u32 max_pages; + + /** @grow_pages: Pages to grow free list by per request. */ + u32 grow_pages; + + /** + * @grow_threshold: Percentage of FL memory used that should trigger a + * new grow request. + */ + u32 grow_threshold; + + /** + * @ready_pages: Number of pages reserved for FW to use while a grow + * request is being processed. + */ + u32 ready_pages; + + /** @mem_block_list: List of memory blocks in this free list. */ + struct list_head mem_block_list; + + /** @hwrt_list: List of HWRTs using this free list. */ + struct list_head hwrt_list; + + /** @initial_num_pages: Initial number of pages in free list. */ + u32 initial_num_pages; + + /** @free_list_gpu_addr: Address of free list in GPU address space. */ + u64 free_list_gpu_addr; +}; + +struct pvr_free_list * +pvr_free_list_create(struct pvr_file *pvr_file, + struct drm_pvr_ioctl_create_free_list_args *args); + +void +pvr_destroy_free_lists_for_file(struct pvr_file *pvr_file); + +u32 +pvr_get_free_list_min_pages(struct pvr_device *pvr_dev); + +static __always_inline struct pvr_free_list * +pvr_free_list_get(struct pvr_free_list *free_list) +{ + if (free_list) + kref_get(&free_list->ref_count); + + return free_list; +} + +/** + * pvr_free_list_lookup() - Lookup free list pointer from handle and file + * @pvr_file: Pointer to pvr_file structure. + * @handle: Object handle. + * + * Takes reference on free list object. Call pvr_free_list_put() to release. + * + * Returns: + * * The requested object on success, or + * * %NULL on failure (object does not exist in list, is not a free list, or + * does not belong to @pvr_file) + */ +static __always_inline struct pvr_free_list * +pvr_free_list_lookup(struct pvr_file *pvr_file, u32 handle) +{ + struct pvr_free_list *free_list; + + xa_lock(&pvr_file->free_list_handles); + free_list = pvr_free_list_get(xa_load(&pvr_file->free_list_handles, handle)); + xa_unlock(&pvr_file->free_list_handles); + + return free_list; +} + +/** + * pvr_free_list_lookup_id() - Lookup free list pointer from FW ID + * @pvr_dev: Device pointer. + * @id: FW object ID. + * + * Takes reference on free list object. Call pvr_free_list_put() to release. + * + * Returns: + * * The requested object on success, or + * * %NULL on failure (object does not exist in list, or is not a free list) + */ +static __always_inline struct pvr_free_list * +pvr_free_list_lookup_id(struct pvr_device *pvr_dev, u32 id) +{ + struct pvr_free_list *free_list; + + xa_lock(&pvr_dev->free_list_ids); + + /* Contexts are removed from the ctx_ids set in the context release path, + * meaning the ref_count reached zero before they get removed. We need + * to make sure we're not trying to acquire a context that's being + * destroyed. + */ + free_list = xa_load(&pvr_dev->free_list_ids, id); + if (free_list && !kref_get_unless_zero(&free_list->ref_count)) + free_list = NULL; + xa_unlock(&pvr_dev->free_list_ids); + + return free_list; +} + +void +pvr_free_list_put(struct pvr_free_list *free_list); + +void +pvr_free_list_add_hwrt(struct pvr_free_list *free_list, struct pvr_hwrt_data *hwrt_data); +void +pvr_free_list_remove_hwrt(struct pvr_free_list *free_list, struct pvr_hwrt_data *hwrt_data); + +void pvr_free_list_process_grow_req(struct pvr_device *pvr_dev, + struct rogue_fwif_fwccb_cmd_freelist_gs_data *req); + +void +pvr_free_list_process_reconstruct_req(struct pvr_device *pvr_dev, + struct rogue_fwif_fwccb_cmd_freelists_reconstruction_data *req); + +#endif /* PVR_FREE_LIST_H */ |