diff options
Diffstat (limited to 'driver/umem.h')
| -rw-r--r-- | driver/umem.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/driver/umem.h b/driver/umem.h index d16c466..d504ecb 100644 --- a/driver/umem.h +++ b/driver/umem.h @@ -1,5 +1,26 @@ +#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 */ |