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#ifndef _PCILIB_KMEM_H
#define _PCILIB_KMEM_H
#include "pcilib.h"
typedef enum {
PCILIB_KMEM_FLAG_REUSE = 1, /**< Try to reuse buffers on alloc and only unmap non-reused buffers on free (reused are freed only if FORCE flag is specified) */
// PCILIB_KMEM_FLAG_FORCE = 2 /**< Force buffer
} pcilib_kmem_flags_t;
typedef enum {
PCILIB_KMEM_REUSE_ALLOCATED = 0,
PCILIB_KMEM_REUSE_PARTIAL = 1,
PCILIB_KMEM_REUSE_REUSED = 2
} pcilib_kmem_reuse_t;
typedef struct {
int handle_id;
int reused;
uintptr_t pa;
// uintptr_t va;
void *ua;
size_t size;
size_t alignment_offset;
size_t mmap_offset;
} pcilib_kmem_addr_t;
/**
* single allocation - we set only addr, n_blocks = 0
* multiple allocation - addr is not set, blocks are set, n_blocks > 0
* sgmap allocation - addr contains ua, but pa's are set in blocks, n_blocks > 0
*/
typedef struct {
pcilib_kmem_addr_t addr;
pcilib_kmem_reuse_t reuse;
size_t n_blocks;
pcilib_kmem_addr_t blocks[];
} pcilib_kmem_buffer_t;
typedef void pcilib_kmem_handle_t;
typedef struct pcilib_kmem_list_s pcilib_kmem_list_t;
struct pcilib_kmem_list_s {
pcilib_kmem_list_t *next, *prev;
pcilib_kmem_buffer_t buf; // variable size, should be last item in struct
};
pcilib_kmem_handle_t *pcilib_alloc_kernel_memory(pcilib_t *ctx, pcilib_kmem_type_t type, size_t nmemb, size_t size, size_t alignment, pcilib_kmem_use_t use, pcilib_kmem_flags_t flags);
void pcilib_free_kernel_memory(pcilib_t *ctx, pcilib_kmem_handle_t *k, pcilib_kmem_flags_t flags);
int pcilib_sync_kernel_memory(pcilib_t *ctx, pcilib_kmem_handle_t *k, pcilib_kmem_sync_direction_t dir);
void *pcilib_kmem_get_ua(pcilib_t *ctx, pcilib_kmem_handle_t *k);
uintptr_t pcilib_kmem_get_pa(pcilib_t *ctx, pcilib_kmem_handle_t *k);
void *pcilib_kmem_get_block_ua(pcilib_t *ctx, pcilib_kmem_handle_t *k, size_t block);
uintptr_t pcilib_kmem_get_block_pa(pcilib_t *ctx, pcilib_kmem_handle_t *k, size_t block);
size_t pcilib_kmem_get_block_size(pcilib_t *ctx, pcilib_kmem_handle_t *k, size_t block);
pcilib_kmem_reuse_t pcilib_kmem_is_reused(pcilib_t *ctx, pcilib_kmem_handle_t *k);
#endif /* _PCILIB_KMEM_H */
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