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#ifndef _PCIDRIVER_UMEM_H
#define _PCIDRIVER_UMEM_H
#include <linux/sysfs.h>
#include "ioctl.h"
/* Define an entry in the umem list (this list is per device) */
/* This list keeps references to the SG lists for each mapped userspace region */
typedef struct {
int id;
struct list_head list;
unsigned int nr_pages; /* number of pages for this user memeory area */
struct page **pages; /* list of pointers to the pages */
unsigned int nents; /* actual entries in the scatter/gatter list (NOT nents for the map function, but the result) */
struct scatterlist *sg; /* list of sg entries */
struct device_attribute sysfs_attr; /* initialized when adding the entry */
} pcidriver_umem_entry_t;
int pcidriver_umem_sgmap( pcidriver_privdata_t *privdata, umem_handle_t *umem_handle );
int pcidriver_umem_sgunmap( pcidriver_privdata_t *privdata, pcidriver_umem_entry_t *umem_entry );
int pcidriver_umem_sgget( pcidriver_privdata_t *privdata, umem_sglist_t *umem_sglist );
int pcidriver_umem_sync( pcidriver_privdata_t *privdata, umem_handle_t *umem_handle );
pcidriver_umem_entry_t *pcidriver_umem_find_entry_id( pcidriver_privdata_t *privdata, int id );
#endif /* _PCIDRIVER_UMEM_H */
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