1 /* $OpenBSD: xenvar.h,v 1.51 2017/07/21 20:00:47 mikeb Exp $ */
2
3 /*
4 * Copyright (c) 2015 Mike Belopuhov
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #ifndef _DEV_PV_XENVAR_H_
20 #define _DEV_PV_XENVAR_H_
21
22 static inline void
clear_bit(u_int b,volatile void * p)23 clear_bit(u_int b, volatile void *p)
24 {
25 atomic_clearbits_int(((volatile u_int *)p) + (b >> 5), 1 << (b & 0x1f));
26 }
27
28 static inline void
set_bit(u_int b,volatile void * p)29 set_bit(u_int b, volatile void *p)
30 {
31 atomic_setbits_int(((volatile u_int *)p) + (b >> 5), 1 << (b & 0x1f));
32 }
33
34 static inline int
test_bit(u_int b,volatile void * p)35 test_bit(u_int b, volatile void *p)
36 {
37 return !!(((volatile u_int *)p)[b >> 5] & (1 << (b & 0x1f)));
38 }
39
40 #define XEN_MAX_NODE_LEN 64
41 #define XEN_MAX_BACKEND_LEN 128
42
43 struct xen_intsrc {
44 SLIST_ENTRY(xen_intsrc) xi_entry;
45 struct evcount xi_evcnt;
46 evtchn_port_t xi_port;
47 short xi_noclose;
48 short xi_masked;
49 struct refcnt xi_refcnt;
50 struct task xi_task;
51 struct taskq *xi_taskq;
52 void (*xi_handler)(void *);
53 void *xi_ctx;
54 };
55
56 struct xen_gntent {
57 grant_entry_t *ge_table;
58 grant_ref_t ge_start;
59 short ge_reserved;
60 short ge_next;
61 short ge_free;
62 struct mutex ge_lock;
63 };
64
65 struct xen_gntmap {
66 grant_ref_t gm_ref;
67 paddr_t gm_paddr;
68 };
69
70 struct xen_device {
71 struct device *dv_dev;
72 char dv_unit[16];
73 LIST_ENTRY(xen_device) dv_entry;
74 };
75 LIST_HEAD(xen_devices, xen_device);
76
77 struct xen_devlist {
78 struct xen_softc *dl_xen;
79 char dl_node[XEN_MAX_NODE_LEN];
80 struct task dl_task;
81 struct xen_devices dl_devs;
82 SLIST_ENTRY(xen_devlist) dl_entry;
83 };
84 SLIST_HEAD(xen_devlists, xen_devlist);
85
86 struct xen_softc {
87 struct device sc_dev;
88 uint32_t sc_base;
89 void *sc_hc;
90 uint32_t sc_features;
91 #define XENFEAT_CBVEC (1<<8)
92
93 bus_dma_tag_t sc_dmat; /* parent dma tag */
94
95 struct shared_info *sc_ipg; /* HYPERVISOR_shared_info */
96
97 uint32_t sc_flags;
98 #define XSF_CBVEC 0x0001
99
100 uint32_t sc_unplug;
101
102 uint64_t sc_irq; /* IDT vector number */
103 SLIST_HEAD(, xen_intsrc) sc_intrs;
104 struct mutex sc_islck;
105
106 struct xen_gntent *sc_gnt; /* grant table entries */
107 struct mutex sc_gntlck;
108 int sc_gntcnt; /* number of allocated frames */
109 int sc_gntmax; /* number of allotted frames */
110
111 /*
112 * Xenstore
113 */
114 struct xs_softc *sc_xs; /* xenstore softc */
115 struct task sc_ctltsk; /* control task */
116 struct xen_devlists sc_devlists; /* device lists heads */
117 };
118
119 extern struct xen_softc *xen_sc;
120
121 struct xen_attach_args {
122 char xa_name[16];
123 char xa_node[XEN_MAX_NODE_LEN];
124 char xa_backend[XEN_MAX_BACKEND_LEN];
125 int xa_domid;
126 bus_dma_tag_t xa_dmat;
127 };
128
129 /*
130 * Hypercalls
131 */
132 #define XC_MEMORY 12
133 #define XC_OEVTCHN 16
134 #define XC_VERSION 17
135 #define XC_GNTTAB 20
136 #define XC_EVTCHN 32
137 #define XC_HVM 34
138
139 int xen_hypercall(struct xen_softc *, int, int, ...);
140 int xen_hypercallv(struct xen_softc *, int, int, ulong *);
141
142 /*
143 * Interrupts
144 */
145 typedef uint32_t xen_intr_handle_t;
146
147 void xen_intr(void);
148 void xen_intr_ack(void);
149 void xen_intr_signal(xen_intr_handle_t);
150 void xen_intr_schedule(xen_intr_handle_t);
151 void xen_intr_barrier(xen_intr_handle_t);
152 int xen_intr_establish(evtchn_port_t, xen_intr_handle_t *, int,
153 void (*)(void *), void *, char *);
154 int xen_intr_disestablish(xen_intr_handle_t);
155 void xen_intr_enable(void);
156 void xen_intr_mask(xen_intr_handle_t);
157 int xen_intr_unmask(xen_intr_handle_t);
158
159 /*
160 * Miscellaneous
161 */
162 #define XEN_UNPLUG_NIC 0x0001 /* disable emul. NICs */
163 #define XEN_UNPLUG_IDE 0x0002 /* disable emul. primary IDE */
164 #define XEN_UNPLUG_IDESEC 0x0004 /* disable emul. secondary IDE */
165
166 void xen_unplug_emulated(void *, int);
167
168 /*
169 * XenStore
170 */
171 #define XS_LIST 0x01
172 #define XS_READ 0x02
173 #define XS_WATCH 0x04
174 #define XS_TOPEN 0x06
175 #define XS_TCLOSE 0x07
176 #define XS_WRITE 0x0b
177 #define XS_RM 0x0d
178 #define XS_EVENT 0x0f
179 #define XS_ERROR 0x10
180 #define XS_MAX 0x16
181
182 struct xs_transaction {
183 uint32_t xst_id;
184 void *xst_cookie;
185 };
186
187 int xs_cmd(struct xs_transaction *, int, const char *, struct iovec **,
188 int *);
189 void xs_resfree(struct xs_transaction *, struct iovec *, int);
190 int xs_watch(void *, const char *, const char *, struct task *,
191 void (*)(void *), void *);
192 int xs_getnum(void *, const char *, const char *, unsigned long long *);
193 int xs_setnum(void *, const char *, const char *, unsigned long long);
194 int xs_getprop(void *, const char *, const char *, char *, int);
195 int xs_setprop(void *, const char *, const char *, char *, int);
196 int xs_kvop(void *, int, char *, char *, size_t);
197
198 #define XEN_STATE_UNKNOWN "0"
199 #define XEN_STATE_INITIALIZING "1"
200 #define XEN_STATE_INITWAIT "2"
201 #define XEN_STATE_INITIALIZED "3"
202 #define XEN_STATE_CONNECTED "4"
203 #define XEN_STATE_CLOSING "5"
204 #define XEN_STATE_CLOSED "6"
205 #define XEN_STATE_RECONFIGURING "7"
206 #define XEN_STATE_RECONFIGURED "8"
207
208 int xs_await_transition(void *, const char *, const char *,
209 const char *, int);
210
211 #endif /* _DEV_PV_XENVAR_H_ */
212