xref: /openbmc/qemu/hw/ipmi/isa_ipmi_bt.c (revision 135b03cb)
1 /*
2  * QEMU ISA IPMI BT emulation
3  *
4  * Copyright (c) 2015 Corey Minyard, MontaVista Software, LLC
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #include "qemu/osdep.h"
26 #include "qemu/log.h"
27 #include "qemu/module.h"
28 #include "qapi/error.h"
29 #include "hw/ipmi/ipmi.h"
30 #include "hw/irq.h"
31 #include "hw/isa/isa.h"
32 #include "hw/qdev-properties.h"
33 #include "migration/vmstate.h"
34 
35 /* Control register */
36 #define IPMI_BT_CLR_WR_BIT         0
37 #define IPMI_BT_CLR_RD_BIT         1
38 #define IPMI_BT_H2B_ATN_BIT        2
39 #define IPMI_BT_B2H_ATN_BIT        3
40 #define IPMI_BT_SMS_ATN_BIT        4
41 #define IPMI_BT_HBUSY_BIT          6
42 #define IPMI_BT_BBUSY_BIT          7
43 
44 #define IPMI_BT_GET_CLR_WR(d)      (((d) >> IPMI_BT_CLR_WR_BIT) & 0x1)
45 
46 #define IPMI_BT_GET_CLR_RD(d)      (((d) >> IPMI_BT_CLR_RD_BIT) & 0x1)
47 
48 #define IPMI_BT_GET_H2B_ATN(d)     (((d) >> IPMI_BT_H2B_ATN_BIT) & 0x1)
49 
50 #define IPMI_BT_B2H_ATN_MASK       (1 << IPMI_BT_B2H_ATN_BIT)
51 #define IPMI_BT_GET_B2H_ATN(d)     (((d) >> IPMI_BT_B2H_ATN_BIT) & 0x1)
52 #define IPMI_BT_SET_B2H_ATN(d, v)  ((d) = (((d) & ~IPMI_BT_B2H_ATN_MASK) | \
53                                         (!!(v) << IPMI_BT_B2H_ATN_BIT)))
54 
55 #define IPMI_BT_SMS_ATN_MASK       (1 << IPMI_BT_SMS_ATN_BIT)
56 #define IPMI_BT_GET_SMS_ATN(d)     (((d) >> IPMI_BT_SMS_ATN_BIT) & 0x1)
57 #define IPMI_BT_SET_SMS_ATN(d, v)  ((d) = (((d) & ~IPMI_BT_SMS_ATN_MASK) | \
58                                         (!!(v) << IPMI_BT_SMS_ATN_BIT)))
59 
60 #define IPMI_BT_HBUSY_MASK         (1 << IPMI_BT_HBUSY_BIT)
61 #define IPMI_BT_GET_HBUSY(d)       (((d) >> IPMI_BT_HBUSY_BIT) & 0x1)
62 #define IPMI_BT_SET_HBUSY(d, v)    ((d) = (((d) & ~IPMI_BT_HBUSY_MASK) | \
63                                        (!!(v) << IPMI_BT_HBUSY_BIT)))
64 
65 #define IPMI_BT_BBUSY_MASK         (1 << IPMI_BT_BBUSY_BIT)
66 #define IPMI_BT_SET_BBUSY(d, v)    ((d) = (((d) & ~IPMI_BT_BBUSY_MASK) | \
67                                        (!!(v) << IPMI_BT_BBUSY_BIT)))
68 
69 
70 /* Mask register */
71 #define IPMI_BT_B2H_IRQ_EN_BIT     0
72 #define IPMI_BT_B2H_IRQ_BIT        1
73 
74 #define IPMI_BT_B2H_IRQ_EN_MASK      (1 << IPMI_BT_B2H_IRQ_EN_BIT)
75 #define IPMI_BT_GET_B2H_IRQ_EN(d)    (((d) >> IPMI_BT_B2H_IRQ_EN_BIT) & 0x1)
76 #define IPMI_BT_SET_B2H_IRQ_EN(d, v) ((d) = (((d) & ~IPMI_BT_B2H_IRQ_EN_MASK) |\
77                                         (!!(v) << IPMI_BT_B2H_IRQ_EN_BIT)))
78 
79 #define IPMI_BT_B2H_IRQ_MASK         (1 << IPMI_BT_B2H_IRQ_BIT)
80 #define IPMI_BT_GET_B2H_IRQ(d)       (((d) >> IPMI_BT_B2H_IRQ_BIT) & 0x1)
81 #define IPMI_BT_SET_B2H_IRQ(d, v)    ((d) = (((d) & ~IPMI_BT_B2H_IRQ_MASK) | \
82                                         (!!(v) << IPMI_BT_B2H_IRQ_BIT)))
83 
84 typedef struct IPMIBT {
85     IPMIBmc *bmc;
86 
87     bool do_wake;
88 
89     qemu_irq irq;
90 
91     uint32_t io_base;
92     unsigned long io_length;
93     MemoryRegion io;
94 
95     bool obf_irq_set;
96     bool atn_irq_set;
97     bool use_irq;
98     bool irqs_enabled;
99 
100     uint8_t outmsg[MAX_IPMI_MSG_SIZE];
101     uint32_t outpos;
102     uint32_t outlen;
103 
104     uint8_t inmsg[MAX_IPMI_MSG_SIZE];
105     uint32_t inlen;
106 
107     uint8_t control_reg;
108     uint8_t mask_reg;
109 
110     /*
111      * This is a response number that we send with the command to make
112      * sure that the response matches the command.
113      */
114     uint8_t waiting_rsp;
115     uint8_t waiting_seq;
116 } IPMIBT;
117 
118 #define IPMI_CMD_GET_BT_INTF_CAP        0x36
119 
120 static void ipmi_bt_handle_event(IPMIInterface *ii)
121 {
122     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
123     IPMIBT *ib = iic->get_backend_data(ii);
124 
125     if (ib->inlen < 4) {
126         goto out;
127     }
128     /* Note that overruns are handled by handle_command */
129     if (ib->inmsg[0] != (ib->inlen - 1)) {
130         /* Length mismatch, just ignore. */
131         IPMI_BT_SET_BBUSY(ib->control_reg, 1);
132         ib->inlen = 0;
133         goto out;
134     }
135     if ((ib->inmsg[1] == (IPMI_NETFN_APP << 2)) &&
136                         (ib->inmsg[3] == IPMI_CMD_GET_BT_INTF_CAP)) {
137         /* We handle this one ourselves. */
138         ib->outmsg[0] = 9;
139         ib->outmsg[1] = ib->inmsg[1] | 0x04;
140         ib->outmsg[2] = ib->inmsg[2];
141         ib->outmsg[3] = ib->inmsg[3];
142         ib->outmsg[4] = 0;
143         ib->outmsg[5] = 1; /* Only support 1 outstanding request. */
144         if (sizeof(ib->inmsg) > 0xff) { /* Input buffer size */
145             ib->outmsg[6] = 0xff;
146         } else {
147             ib->outmsg[6] = (unsigned char) sizeof(ib->inmsg);
148         }
149         if (sizeof(ib->outmsg) > 0xff) { /* Output buffer size */
150             ib->outmsg[7] = 0xff;
151         } else {
152             ib->outmsg[7] = (unsigned char) sizeof(ib->outmsg);
153         }
154         ib->outmsg[8] = 10; /* Max request to response time */
155         ib->outmsg[9] = 0; /* Don't recommend retries */
156         ib->outlen = 10;
157         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
158         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
159         if (ib->use_irq && ib->irqs_enabled &&
160                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
161                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
162             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
163             qemu_irq_raise(ib->irq);
164         }
165         goto out;
166     }
167     ib->waiting_seq = ib->inmsg[2];
168     ib->inmsg[2] = ib->inmsg[1];
169     {
170         IPMIBmcClass *bk = IPMI_BMC_GET_CLASS(ib->bmc);
171         bk->handle_command(ib->bmc, ib->inmsg + 2, ib->inlen - 2,
172                            sizeof(ib->inmsg), ib->waiting_rsp);
173     }
174  out:
175     return;
176 }
177 
178 static void ipmi_bt_handle_rsp(IPMIInterface *ii, uint8_t msg_id,
179                                 unsigned char *rsp, unsigned int rsp_len)
180 {
181     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
182     IPMIBT *ib = iic->get_backend_data(ii);
183 
184     if (ib->waiting_rsp == msg_id) {
185         ib->waiting_rsp++;
186         if (rsp_len > (sizeof(ib->outmsg) - 2)) {
187             ib->outmsg[0] = 4;
188             ib->outmsg[1] = rsp[0];
189             ib->outmsg[2] = ib->waiting_seq;
190             ib->outmsg[3] = rsp[1];
191             ib->outmsg[4] = IPMI_CC_CANNOT_RETURN_REQ_NUM_BYTES;
192             ib->outlen = 5;
193         } else {
194             ib->outmsg[0] = rsp_len + 1;
195             ib->outmsg[1] = rsp[0];
196             ib->outmsg[2] = ib->waiting_seq;
197             memcpy(ib->outmsg + 3, rsp + 1, rsp_len - 1);
198             ib->outlen = rsp_len + 2;
199         }
200         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
201         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
202         if (ib->use_irq && ib->irqs_enabled &&
203                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
204                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
205             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
206             qemu_irq_raise(ib->irq);
207         }
208     }
209 }
210 
211 
212 static uint64_t ipmi_bt_ioport_read(void *opaque, hwaddr addr, unsigned size)
213 {
214     IPMIInterface *ii = opaque;
215     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
216     IPMIBT *ib = iic->get_backend_data(ii);
217     uint32_t ret = 0xff;
218 
219     switch (addr & 3) {
220     case 0:
221         ret = ib->control_reg;
222         break;
223     case 1:
224         if (ib->outpos < ib->outlen) {
225             ret = ib->outmsg[ib->outpos];
226             ib->outpos++;
227             if (ib->outpos == ib->outlen) {
228                 ib->outpos = 0;
229                 ib->outlen = 0;
230             }
231         } else {
232             ret = 0xff;
233         }
234         break;
235     case 2:
236         ret = ib->mask_reg;
237         break;
238     }
239     return ret;
240 }
241 
242 static void ipmi_bt_signal(IPMIBT *ib, IPMIInterface *ii)
243 {
244     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
245 
246     ib->do_wake = 1;
247     while (ib->do_wake) {
248         ib->do_wake = 0;
249         iic->handle_if_event(ii);
250     }
251 }
252 
253 static void ipmi_bt_ioport_write(void *opaque, hwaddr addr, uint64_t val,
254                                  unsigned size)
255 {
256     IPMIInterface *ii = opaque;
257     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
258     IPMIBT *ib = iic->get_backend_data(ii);
259 
260     switch (addr & 3) {
261     case 0:
262         if (IPMI_BT_GET_CLR_WR(val)) {
263             ib->inlen = 0;
264         }
265         if (IPMI_BT_GET_CLR_RD(val)) {
266             ib->outpos = 0;
267         }
268         if (IPMI_BT_GET_B2H_ATN(val)) {
269             IPMI_BT_SET_B2H_ATN(ib->control_reg, 0);
270         }
271         if (IPMI_BT_GET_SMS_ATN(val)) {
272             IPMI_BT_SET_SMS_ATN(ib->control_reg, 0);
273         }
274         if (IPMI_BT_GET_HBUSY(val)) {
275             /* Toggle */
276             IPMI_BT_SET_HBUSY(ib->control_reg,
277                               !IPMI_BT_GET_HBUSY(ib->control_reg));
278         }
279         if (IPMI_BT_GET_H2B_ATN(val)) {
280             IPMI_BT_SET_BBUSY(ib->control_reg, 1);
281             ipmi_bt_signal(ib, ii);
282         }
283         break;
284 
285     case 1:
286         if (ib->inlen < sizeof(ib->inmsg)) {
287             ib->inmsg[ib->inlen] = val;
288         }
289         ib->inlen++;
290         break;
291 
292     case 2:
293         if (IPMI_BT_GET_B2H_IRQ_EN(val) !=
294                         IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
295             if (IPMI_BT_GET_B2H_IRQ_EN(val)) {
296                 if (IPMI_BT_GET_B2H_ATN(ib->control_reg) ||
297                         IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
298                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
299                     qemu_irq_raise(ib->irq);
300                 }
301                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 1);
302             } else {
303                 if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
304                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
305                     qemu_irq_lower(ib->irq);
306                 }
307                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
308             }
309         }
310         if (IPMI_BT_GET_B2H_IRQ(val) && IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
311             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
312             qemu_irq_lower(ib->irq);
313         }
314         break;
315     }
316 }
317 
318 static const MemoryRegionOps ipmi_bt_io_ops = {
319     .read = ipmi_bt_ioport_read,
320     .write = ipmi_bt_ioport_write,
321     .impl = {
322         .min_access_size = 1,
323         .max_access_size = 1,
324     },
325     .endianness = DEVICE_LITTLE_ENDIAN,
326 };
327 
328 static void ipmi_bt_set_atn(IPMIInterface *ii, int val, int irq)
329 {
330     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
331     IPMIBT *ib = iic->get_backend_data(ii);
332 
333     if (!!val == IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
334         return;
335     }
336 
337     IPMI_BT_SET_SMS_ATN(ib->control_reg, val);
338     if (val) {
339         if (irq && ib->use_irq && ib->irqs_enabled &&
340                 !IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
341                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
342             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
343             qemu_irq_raise(ib->irq);
344         }
345     } else {
346         if (!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
347                 IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
348             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
349             qemu_irq_lower(ib->irq);
350         }
351     }
352 }
353 
354 static void ipmi_bt_handle_reset(IPMIInterface *ii, bool is_cold)
355 {
356     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
357     IPMIBT *ib = iic->get_backend_data(ii);
358 
359     if (is_cold) {
360         /* Disable the BT interrupt on reset */
361         if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
362             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
363             qemu_irq_lower(ib->irq);
364         }
365         IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
366     }
367 }
368 
369 static void ipmi_bt_set_irq_enable(IPMIInterface *ii, int val)
370 {
371     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
372     IPMIBT *ib = iic->get_backend_data(ii);
373 
374     ib->irqs_enabled = val;
375 }
376 
377 static void ipmi_bt_init(IPMIInterface *ii, Error **errp)
378 {
379     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
380     IPMIBT *ib = iic->get_backend_data(ii);
381 
382     ib->io_length = 3;
383 
384     memory_region_init_io(&ib->io, NULL, &ipmi_bt_io_ops, ii, "ipmi-bt", 3);
385 }
386 
387 
388 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
389 #define ISA_IPMI_BT(obj) OBJECT_CHECK(ISAIPMIBTDevice, (obj), \
390                                        TYPE_ISA_IPMI_BT)
391 
392 typedef struct ISAIPMIBTDevice {
393     ISADevice dev;
394     int32_t isairq;
395     IPMIBT bt;
396     uint32_t uuid;
397 } ISAIPMIBTDevice;
398 
399 static void ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
400 {
401     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
402 
403     info->interface_name = "bt";
404     info->interface_type = IPMI_SMBIOS_BT;
405     info->ipmi_spec_major_revision = 2;
406     info->ipmi_spec_minor_revision = 0;
407     info->base_address = iib->bt.io_base;
408     info->register_length = iib->bt.io_length;
409     info->register_spacing = 1;
410     info->memspace = IPMI_MEMSPACE_IO;
411     info->irq_type = IPMI_LEVEL_IRQ;
412     info->interrupt_number = iib->isairq;
413     info->i2c_slave_address = iib->bt.bmc->slave_addr;
414     info->uuid = iib->uuid;
415 }
416 
417 static void ipmi_bt_class_init(IPMIInterfaceClass *iic)
418 {
419     iic->init = ipmi_bt_init;
420     iic->set_atn = ipmi_bt_set_atn;
421     iic->handle_rsp = ipmi_bt_handle_rsp;
422     iic->handle_if_event = ipmi_bt_handle_event;
423     iic->set_irq_enable = ipmi_bt_set_irq_enable;
424     iic->reset = ipmi_bt_handle_reset;
425     iic->get_fwinfo = ipmi_bt_get_fwinfo;
426 }
427 
428 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
429 {
430     ISADevice *isadev = ISA_DEVICE(dev);
431     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
432     IPMIInterface *ii = IPMI_INTERFACE(dev);
433     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
434 
435     if (!iib->bt.bmc) {
436         error_setg(errp, "IPMI device requires a bmc attribute to be set");
437         return;
438     }
439 
440     iib->uuid = ipmi_next_uuid();
441 
442     iib->bt.bmc->intf = ii;
443 
444     iic->init(ii, errp);
445     if (*errp)
446         return;
447 
448     if (iib->isairq > 0) {
449         isa_init_irq(isadev, &iib->bt.irq, iib->isairq);
450         iib->bt.use_irq = 1;
451     }
452 
453     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
454 
455     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
456 }
457 
458 static int ipmi_bt_vmstate_post_load(void *opaque, int version)
459 {
460     IPMIBT *ib = opaque;
461 
462     /* Make sure all the values are sane. */
463     if (ib->outpos >= MAX_IPMI_MSG_SIZE || ib->outlen >= MAX_IPMI_MSG_SIZE ||
464         ib->outpos >= ib->outlen) {
465         qemu_log_mask(LOG_GUEST_ERROR,
466                       "ipmi:bt: vmstate transfer received bad out values: %d %d\n",
467                       ib->outpos, ib->outlen);
468         ib->outpos = 0;
469         ib->outlen = 0;
470     }
471 
472     if (ib->inlen >= MAX_IPMI_MSG_SIZE) {
473         qemu_log_mask(LOG_GUEST_ERROR,
474                       "ipmi:bt: vmstate transfer received bad in value: %d\n",
475                       ib->inlen);
476         ib->inlen = 0;
477     }
478 
479     return 0;
480 }
481 
482 const VMStateDescription vmstate_IPMIBT = {
483     .name = TYPE_IPMI_INTERFACE_PREFIX "bt",
484     .version_id = 1,
485     .minimum_version_id = 1,
486     .post_load = ipmi_bt_vmstate_post_load,
487     .fields      = (VMStateField[]) {
488         VMSTATE_BOOL(obf_irq_set, IPMIBT),
489         VMSTATE_BOOL(atn_irq_set, IPMIBT),
490         VMSTATE_BOOL(irqs_enabled, IPMIBT),
491         VMSTATE_UINT32(outpos, IPMIBT),
492         VMSTATE_UINT32(outlen, IPMIBT),
493         VMSTATE_UINT8_ARRAY(outmsg, IPMIBT, MAX_IPMI_MSG_SIZE),
494         VMSTATE_UINT32(inlen, IPMIBT),
495         VMSTATE_UINT8_ARRAY(inmsg, IPMIBT, MAX_IPMI_MSG_SIZE),
496         VMSTATE_UINT8(control_reg, IPMIBT),
497         VMSTATE_UINT8(mask_reg, IPMIBT),
498         VMSTATE_UINT8(waiting_rsp, IPMIBT),
499         VMSTATE_UINT8(waiting_seq, IPMIBT),
500         VMSTATE_END_OF_LIST()
501     }
502 };
503 
504 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
505     .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
506     .version_id = 2,
507     .minimum_version_id = 2,
508     /*
509      * Version 1 had messed up the array transfer, it's not even usable
510      * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
511      * the buffer length, so random things would happen.
512      */
513     .fields      = (VMStateField[]) {
514         VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
515         VMSTATE_END_OF_LIST()
516     }
517 };
518 
519 static void isa_ipmi_bt_init(Object *obj)
520 {
521     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
522 
523     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
524 
525     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
526 }
527 
528 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
529 {
530     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
531 
532     return &iib->bt;
533 }
534 
535 static Property ipmi_isa_properties[] = {
536     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
537     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
538     DEFINE_PROP_END_OF_LIST(),
539 };
540 
541 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
542 {
543     DeviceClass *dc = DEVICE_CLASS(oc);
544     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
545 
546     dc->realize = isa_ipmi_bt_realize;
547     dc->props = ipmi_isa_properties;
548 
549     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
550     ipmi_bt_class_init(iic);
551 }
552 
553 static const TypeInfo isa_ipmi_bt_info = {
554     .name          = TYPE_ISA_IPMI_BT,
555     .parent        = TYPE_ISA_DEVICE,
556     .instance_size = sizeof(ISAIPMIBTDevice),
557     .instance_init = isa_ipmi_bt_init,
558     .class_init    = isa_ipmi_bt_class_init,
559     .interfaces = (InterfaceInfo[]) {
560         { TYPE_IPMI_INTERFACE },
561         { }
562     }
563 };
564 
565 static void ipmi_register_types(void)
566 {
567     type_register_static(&isa_ipmi_bt_info);
568 }
569 
570 type_init(ipmi_register_types)
571