1 /******************************************************************************
2 * drivers/xen/tpmback/common.h
5 #ifndef __NETIF__BACKEND__COMMON_H__
6 #define __NETIF__BACKEND__COMMON_H__
8 #include <linux/version.h>
9 #include <linux/module.h>
10 #include <linux/interrupt.h>
11 #include <linux/slab.h>
12 #include <xen/evtchn.h>
13 #include <xen/driver_util.h>
14 #include <xen/interface/grant_table.h>
15 #include <xen/interface/io/tpmif.h>
17 #include <asm/pgalloc.h>
19 #define DPRINTK(_f, _a...) \
20 pr_debug("(file=%s, line=%d) " _f, \
21 __FILE__ , __LINE__ , ## _a )
25 typedef struct tpmif_st {
26 struct list_head tpmif_list;
27 /* Unique identifier for this interface. */
31 /* Physical parameters of the comms window. */
35 /* The shared rings and indexes. */
36 tpmif_tx_interface_t *tx;
37 struct vm_struct *tx_area;
39 /* Miscellaneous private stuff. */
40 enum { DISCONNECTED, DISCONNECTING, CONNECTED } status;
43 struct tpmif_st *hash_next;
44 struct list_head list; /* scheduling list */
47 struct backend_info *bi;
49 grant_handle_t shmem_handle;
50 grant_ref_t shmem_ref;
51 struct page **mmap_pages;
56 void tpmif_disconnect_complete(tpmif_t * tpmif);
57 tpmif_t *tpmif_find(domid_t domid, struct backend_info *bi);
58 void tpmif_interface_init(void);
59 void tpmif_interface_exit(void);
60 void tpmif_schedule_work(tpmif_t * tpmif);
61 void tpmif_deschedule_work(tpmif_t * tpmif);
62 void tpmif_xenbus_init(void);
63 void tpmif_xenbus_exit(void);
64 int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn);
65 irqreturn_t tpmif_be_int(int irq, void *dev_id, struct pt_regs *regs);
67 long int tpmback_get_instance(struct backend_info *bi);
69 int vtpm_release_packets(tpmif_t * tpmif, int send_msgs);
72 #define tpmif_get(_b) (atomic_inc(&(_b)->refcnt))
73 #define tpmif_put(_b) \
75 if (atomic_dec_and_test(&(_b)->refcnt)) \
76 tpmif_disconnect_complete(_b); \
79 extern int num_frontends;
81 static inline unsigned long idx_to_kaddr(tpmif_t *t, unsigned int idx)
83 return (unsigned long)pfn_to_kaddr(page_to_pfn(t->mmap_pages[idx]));
86 #endif /* __TPMIF__BACKEND__COMMON_H__ */