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#ifndef _PCILIB_KMEM_H
#define _PCILIB_KMEM_H
#include <stdint.h>
typedef struct pcilib_s pcilib_t;
typedef struct pcilib_kmem_list_s pcilib_kmem_list_t;
#define PCILIB_KMEM_PAGE_SIZE 0x1000
typedef enum {
PCILIB_TRISTATE_NO = 0,
PCILIB_TRISTATE_PARTIAL = 1,
PCILIB_TRISTATE_YES = 2
} pcilib_tristate_t;
#define PCILIB_KMEM_TYPE_MASK 0xFFFF0000
#define PCILIB_KMEM_USE(type, subtype) ((pcilib_kmem_use_t)(((type) << 16)|(subtype)))
#define PCILIB_KMEM_USE_TYPE(use) (use >> 16)
#define PCILIB_KMEM_USE_SUBTYPE(use) (use & 0xFFFF)
typedef enum {
PCILIB_KMEM_TYPE_CONSISTENT = 0x00000,
PCILIB_KMEM_TYPE_PAGE = 0x10000,
PCILIB_KMEM_TYPE_DMA_S2C_PAGE = 0x10001,
PCILIB_KMEM_TYPE_DMA_C2S_PAGE = 0x10002,
PCILIB_KMEM_TYPE_REGION = 0x20000,
PCILIB_KMEM_TYPE_REGION_S2C = 0x20001,
PCILIB_KMEM_TYPE_REGION_C2S = 0x20002
} pcilib_kmem_type_t;
typedef enum {
PCILIB_KMEM_USE_STANDARD = 0,
PCILIB_KMEM_USE_DMA_RING = 1,
PCILIB_KMEM_USE_DMA_PAGES = 2,
PCILIB_KMEM_USE_SOFTWARE_REGISTERS = 3,
PCILIB_KMEM_USE_LOCKS = 4,
PCILIB_KMEM_USE_USER = 0x10
} pcilib_kmem_use_t;
typedef enum {
PCILIB_KMEM_SYNC_BIDIRECTIONAL = 0,
PCILIB_KMEM_SYNC_TODEVICE = 1,
PCILIB_KMEM_SYNC_FROMDEVICE = 2
} pcilib_kmem_sync_direction_t;
typedef enum {
PCILIB_KMEM_FLAG_REUSE = 1, /**< Try to reuse existing buffer with the same use & item */
PCILIB_KMEM_FLAG_EXCLUSIVE = 2, /**< Allow only a single application accessing a specified use & item */
PCILIB_KMEM_FLAG_PERSISTENT = 4, /**< Sets persistent mode */
PCILIB_KMEM_FLAG_HARDWARE = 8, /**< The buffer may be accessed by hardware, the hardware access will not occur any more if passed to _free function */
PCILIB_KMEM_FLAG_FORCE = 16, /**< Force memory cleanup even if references are present */
PCILIB_KMEM_FLAG_MASS = 32, /**< Apply to all buffers of selected use */
PCILIB_KMEM_FLAG_TRY = 64 /**< Do not allocate buffers, try to reuse and fail if not possible */
} pcilib_kmem_flags_t;
typedef enum {
PCILIB_KMEM_REUSE_ALLOCATED = PCILIB_TRISTATE_NO,
PCILIB_KMEM_REUSE_REUSED = PCILIB_TRISTATE_YES,
PCILIB_KMEM_REUSE_PARTIAL = PCILIB_TRISTATE_PARTIAL,
PCILIB_KMEM_REUSE_PERSISTENT = 0x100,
PCILIB_KMEM_REUSE_HARDWARE = 0x200
} pcilib_kmem_reuse_state_t;
typedef struct {
int handle_id;
pcilib_kmem_reuse_state_t 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_state_t reused;
size_t n_blocks;
pcilib_kmem_addr_t blocks[];
} pcilib_kmem_buffer_t;
typedef void pcilib_kmem_handle_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
};
#ifdef __cplusplus
extern "C" {
#endif
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_kmem_sync(pcilib_t *ctx, pcilib_kmem_handle_t *k, pcilib_kmem_sync_direction_t dir);
int pcilib_kmem_sync_block(pcilib_t *ctx, pcilib_kmem_handle_t *k, pcilib_kmem_sync_direction_t dir, size_t block);
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);
uintptr_t pcilib_kmem_get_ba(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);
uintptr_t pcilib_kmem_get_block_ba(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_state_t pcilib_kmem_is_reused(pcilib_t *ctx, pcilib_kmem_handle_t *k);
int pcilib_clean_kernel_memory(pcilib_t *ctx, pcilib_kmem_use_t use, pcilib_kmem_flags_t flags);
#ifdef __cplusplus
}
#endif
#endif /* _PCILIB_KMEM_H */
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