diff options
| -rw-r--r-- | drivers/xen/grant-table.c | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index bd325fd0000b..1589ea1a2445 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -76,50 +76,50 @@ static union { /*This is a structure of function pointers for grant table*/ struct gnttab_ops { /* - * Mapping a list of frames for storing grant entries. First input - * parameter is used to storing grant table address when grant table - * being setup, second parameter is the number of frames to map grant - * table. Returning GNTST_okay means success and negative value means - * failure. + * Mapping a list of frames for storing grant entries. Frames parameter + * is used to store grant table address when grant table being setup, + * nr_gframes is the number of frames to map grant table. Returning + * GNTST_okay means success and negative value means failure. */ - int (*map_frames)(unsigned long *, unsigned int); + int (*map_frames)(unsigned long *frames, unsigned int nr_gframes); /* * Release a list of frames which are mapped in map_frames for grant * entry status. */ void (*unmap_frames)(void); /* - * Introducing a valid entry into the grant table, granting the frame - * of this grant entry to domain for accessing, or transfering, or - * transitively accessing. First input parameter is reference of this - * introduced grant entry, second one is domid of granted domain, third - * one is the frame to be granted, and the last one is status of the - * grant entry to be updated. + * Introducing a valid entry into the grant table, granting the frame of + * this grant entry to domain for accessing or transfering. Ref + * parameter is reference of this introduced grant entry, domid is id of + * granted domain, frame is the page frame to be granted, and flags is + * status of the grant entry to be updated. */ - void (*update_entry)(grant_ref_t, domid_t, unsigned long, unsigned); + void (*update_entry)(grant_ref_t ref, domid_t domid, + unsigned long frame, unsigned flags); /* - * Stop granting a grant entry to domain for accessing. First input - * parameter is reference of a grant entry whose grant access will be - * stopped, second one is not in use now. If the grant entry is + * Stop granting a grant entry to domain for accessing. Ref parameter is + * reference of a grant entry whose grant access will be stopped, + * readonly is not in use in this function. If the grant entry is * currently mapped for reading or writing, just return failure(==0) * directly and don't tear down the grant access. Otherwise, stop grant * access for this entry and return success(==1). */ - int (*end_foreign_access_ref)(grant_ref_t, int); + int (*end_foreign_access_ref)(grant_ref_t ref, int readonly); /* - * Stop granting a grant entry to domain for transfer. If tranfer has - * not started, just reclaim the grant entry and return failure(==0). - * Otherwise, wait for the transfer to complete and then return the - * frame. + * Stop granting a grant entry to domain for transfer. Ref parameter is + * reference of a grant entry whose grant transfer will be stopped. If + * tranfer has not started, just reclaim the grant entry and return + * failure(==0). Otherwise, wait for the transfer to complete and then + * return the frame. */ - unsigned long (*end_foreign_transfer_ref)(grant_ref_t); + unsigned long (*end_foreign_transfer_ref)(grant_ref_t ref); /* - * Query the status of a grant entry. Input parameter is reference of + * Query the status of a grant entry. Ref parameter is reference of * queried grant entry, return value is the status of queried entry. * Detailed status(writing/reading) can be gotten from the return value * by bit operations. */ - int (*query_foreign_access)(grant_ref_t); + int (*query_foreign_access)(grant_ref_t ref); }; static struct gnttab_ops *gnttab_interface; |