drm_suballoc.h

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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
 * Copyright 2011 Red Hat Inc.
 * Copyright © 2022 Intel Corporation
 */
#ifndef _DRM_SUBALLOC_H_
#define _DRM_SUBALLOC_H_
 
#include <drm/drm_mm.h>
 
#include <linux/dma-fence.h>
#include <linux/types.h>
 
#define DRM_SUBALLOC_MAX_QUEUES 32
struct drm_suballoc_manager {
    wait_queue_head_t wq;
    struct list_head *hole;
    struct list_head olist;
    struct list_head flist[DRM_SUBALLOC_MAX_QUEUES];
    size_t size;
    size_t align;
};
 
struct drm_suballoc {
    struct list_head olist;
    struct list_head flist;
    struct drm_suballoc_manager *manager;
    size_t soffset;
    size_t eoffset;
    struct dma_fence *fence;
};
 
void drm_suballoc_manager_init(struct drm_suballoc_manager *sa_manager,
                   size_t size, size_t align);
 
void drm_suballoc_manager_fini(struct drm_suballoc_manager *sa_manager);
 
struct drm_suballoc *drm_suballoc_alloc(gfp_t gfp);
 
int drm_suballoc_insert(struct drm_suballoc_manager *sa_manager,
            struct drm_suballoc *sa, size_t size, bool intr,
            size_t align);
 
struct drm_suballoc *
drm_suballoc_new(struct drm_suballoc_manager *sa_manager, size_t size,
         gfp_t gfp, bool intr, size_t align);
 
void drm_suballoc_free(struct drm_suballoc *sa, struct dma_fence *fence);
 
static inline size_t drm_suballoc_soffset(struct drm_suballoc *sa)
{
    return sa->soffset;
}
 
static inline size_t drm_suballoc_eoffset(struct drm_suballoc *sa)
{
    return sa->eoffset;
}
 
static inline size_t drm_suballoc_size(struct drm_suballoc *sa)
{
    return sa->eoffset - sa->soffset;
}
 
#ifdef CONFIG_DEBUG_FS
void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,
                  struct drm_printer *p,
                  unsigned long long suballoc_base);
#else
static inline void
drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,
                 struct drm_printer *p,
                 unsigned long long suballoc_base)
{ }
 
#endif
 
#endif /* _DRM_SUBALLOC_H_ */