1 /******************************************************************************
2 * drivers/xen/tpmback/common.h
5 #ifndef __NETIF__BACKEND__COMMON_H__
6 #define __NETIF__BACKEND__COMMON_H__
8 #include <linux/config.h>
9 #include <linux/version.h>
10 #include <linux/module.h>
11 #include <linux/interrupt.h>
12 #include <linux/slab.h>
13 #include <xen/evtchn.h>
14 #include <xen/driver_util.h>
15 #include <xen/interface/grant_table.h>
16 #include <xen/interface/io/tpmif.h>
18 #include <asm/pgalloc.h>
20 #define DPRINTK(_f, _a...) \
21 pr_debug("(file=%s, line=%d) " _f, \
22 __FILE__ , __LINE__ , ## _a )
26 typedef struct tpmif_st {
27 struct list_head tpmif_list;
28 /* Unique identifier for this interface. */
32 /* Physical parameters of the comms window. */
36 /* The shared rings and indexes. */
37 tpmif_tx_interface_t *tx;
38 struct vm_struct *tx_area;
40 /* Miscellaneous private stuff. */
41 enum { DISCONNECTED, DISCONNECTING, CONNECTED } status;
44 struct tpmif_st *hash_next;
45 struct list_head list; /* scheduling list */
48 struct backend_info *bi;
49 unsigned long mmap_vstart;
51 grant_handle_t shmem_handle;
52 grant_ref_t shmem_ref;
53 struct page *pagerange;
58 void tpmif_disconnect_complete(tpmif_t * tpmif);
59 tpmif_t *tpmif_find(domid_t domid, struct backend_info *bi);
60 void tpmif_interface_init(void);
61 void tpmif_interface_exit(void);
62 void tpmif_schedule_work(tpmif_t * tpmif);
63 void tpmif_deschedule_work(tpmif_t * tpmif);
64 void tpmif_xenbus_init(void);
65 void tpmif_xenbus_exit(void);
66 int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn);
67 irqreturn_t tpmif_be_int(int irq, void *dev_id, struct pt_regs *regs);
69 long int tpmback_get_instance(struct backend_info *bi);
71 int vtpm_release_packets(tpmif_t * tpmif, int send_msgs);
74 #define tpmif_get(_b) (atomic_inc(&(_b)->refcnt))
75 #define tpmif_put(_b) \
77 if (atomic_dec_and_test(&(_b)->refcnt)) \
78 tpmif_disconnect_complete(_b); \
81 extern int num_frontends;
83 #define MMAP_VADDR(t,_req) ((t)->mmap_vstart + ((_req) * PAGE_SIZE))
85 #endif /* __TPMIF__BACKEND__COMMON_H__ */