xref: /openbmc/qemu/hw/ipmi/isa_ipmi_bt.c (revision 500eb6db)
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/hw.h"
30 #include "hw/ipmi/ipmi.h"
31 #include "hw/isa/isa.h"
32 
33 /* Control register */
34 #define IPMI_BT_CLR_WR_BIT         0
35 #define IPMI_BT_CLR_RD_BIT         1
36 #define IPMI_BT_H2B_ATN_BIT        2
37 #define IPMI_BT_B2H_ATN_BIT        3
38 #define IPMI_BT_SMS_ATN_BIT        4
39 #define IPMI_BT_HBUSY_BIT          6
40 #define IPMI_BT_BBUSY_BIT          7
41 
42 #define IPMI_BT_GET_CLR_WR(d)      (((d) >> IPMI_BT_CLR_WR_BIT) & 0x1)
43 
44 #define IPMI_BT_GET_CLR_RD(d)      (((d) >> IPMI_BT_CLR_RD_BIT) & 0x1)
45 
46 #define IPMI_BT_GET_H2B_ATN(d)     (((d) >> IPMI_BT_H2B_ATN_BIT) & 0x1)
47 
48 #define IPMI_BT_B2H_ATN_MASK       (1 << IPMI_BT_B2H_ATN_BIT)
49 #define IPMI_BT_GET_B2H_ATN(d)     (((d) >> IPMI_BT_B2H_ATN_BIT) & 0x1)
50 #define IPMI_BT_SET_B2H_ATN(d, v)  ((d) = (((d) & ~IPMI_BT_B2H_ATN_MASK) | \
51                                         (!!(v) << IPMI_BT_B2H_ATN_BIT)))
52 
53 #define IPMI_BT_SMS_ATN_MASK       (1 << IPMI_BT_SMS_ATN_BIT)
54 #define IPMI_BT_GET_SMS_ATN(d)     (((d) >> IPMI_BT_SMS_ATN_BIT) & 0x1)
55 #define IPMI_BT_SET_SMS_ATN(d, v)  ((d) = (((d) & ~IPMI_BT_SMS_ATN_MASK) | \
56                                         (!!(v) << IPMI_BT_SMS_ATN_BIT)))
57 
58 #define IPMI_BT_HBUSY_MASK         (1 << IPMI_BT_HBUSY_BIT)
59 #define IPMI_BT_GET_HBUSY(d)       (((d) >> IPMI_BT_HBUSY_BIT) & 0x1)
60 #define IPMI_BT_SET_HBUSY(d, v)    ((d) = (((d) & ~IPMI_BT_HBUSY_MASK) | \
61                                        (!!(v) << IPMI_BT_HBUSY_BIT)))
62 
63 #define IPMI_BT_BBUSY_MASK         (1 << IPMI_BT_BBUSY_BIT)
64 #define IPMI_BT_SET_BBUSY(d, v)    ((d) = (((d) & ~IPMI_BT_BBUSY_MASK) | \
65                                        (!!(v) << IPMI_BT_BBUSY_BIT)))
66 
67 
68 /* Mask register */
69 #define IPMI_BT_B2H_IRQ_EN_BIT     0
70 #define IPMI_BT_B2H_IRQ_BIT        1
71 
72 #define IPMI_BT_B2H_IRQ_EN_MASK      (1 << IPMI_BT_B2H_IRQ_EN_BIT)
73 #define IPMI_BT_GET_B2H_IRQ_EN(d)    (((d) >> IPMI_BT_B2H_IRQ_EN_BIT) & 0x1)
74 #define IPMI_BT_SET_B2H_IRQ_EN(d, v) ((d) = (((d) & ~IPMI_BT_B2H_IRQ_EN_MASK) |\
75                                         (!!(v) << IPMI_BT_B2H_IRQ_EN_BIT)))
76 
77 #define IPMI_BT_B2H_IRQ_MASK         (1 << IPMI_BT_B2H_IRQ_BIT)
78 #define IPMI_BT_GET_B2H_IRQ(d)       (((d) >> IPMI_BT_B2H_IRQ_BIT) & 0x1)
79 #define IPMI_BT_SET_B2H_IRQ(d, v)    ((d) = (((d) & ~IPMI_BT_B2H_IRQ_MASK) | \
80                                         (!!(v) << IPMI_BT_B2H_IRQ_BIT)))
81 
82 typedef struct IPMIBT {
83     IPMIBmc *bmc;
84 
85     bool do_wake;
86 
87     qemu_irq irq;
88 
89     uint32_t io_base;
90     unsigned long io_length;
91     MemoryRegion io;
92 
93     bool obf_irq_set;
94     bool atn_irq_set;
95     bool use_irq;
96     bool irqs_enabled;
97 
98     uint8_t outmsg[MAX_IPMI_MSG_SIZE];
99     uint32_t outpos;
100     uint32_t outlen;
101 
102     uint8_t inmsg[MAX_IPMI_MSG_SIZE];
103     uint32_t inlen;
104 
105     uint8_t control_reg;
106     uint8_t mask_reg;
107 
108     /*
109      * This is a response number that we send with the command to make
110      * sure that the response matches the command.
111      */
112     uint8_t waiting_rsp;
113     uint8_t waiting_seq;
114 } IPMIBT;
115 
116 #define IPMI_CMD_GET_BT_INTF_CAP        0x36
117 
118 static void ipmi_bt_handle_event(IPMIInterface *ii)
119 {
120     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
121     IPMIBT *ib = iic->get_backend_data(ii);
122 
123     if (ib->inlen < 4) {
124         goto out;
125     }
126     /* Note that overruns are handled by handle_command */
127     if (ib->inmsg[0] != (ib->inlen - 1)) {
128         /* Length mismatch, just ignore. */
129         IPMI_BT_SET_BBUSY(ib->control_reg, 1);
130         ib->inlen = 0;
131         goto out;
132     }
133     if ((ib->inmsg[1] == (IPMI_NETFN_APP << 2)) &&
134                         (ib->inmsg[3] == IPMI_CMD_GET_BT_INTF_CAP)) {
135         /* We handle this one ourselves. */
136         ib->outmsg[0] = 9;
137         ib->outmsg[1] = ib->inmsg[1] | 0x04;
138         ib->outmsg[2] = ib->inmsg[2];
139         ib->outmsg[3] = ib->inmsg[3];
140         ib->outmsg[4] = 0;
141         ib->outmsg[5] = 1; /* Only support 1 outstanding request. */
142         if (sizeof(ib->inmsg) > 0xff) { /* Input buffer size */
143             ib->outmsg[6] = 0xff;
144         } else {
145             ib->outmsg[6] = (unsigned char) sizeof(ib->inmsg);
146         }
147         if (sizeof(ib->outmsg) > 0xff) { /* Output buffer size */
148             ib->outmsg[7] = 0xff;
149         } else {
150             ib->outmsg[7] = (unsigned char) sizeof(ib->outmsg);
151         }
152         ib->outmsg[8] = 10; /* Max request to response time */
153         ib->outmsg[9] = 0; /* Don't recommend retries */
154         ib->outlen = 10;
155         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
156         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
157         if (ib->use_irq && ib->irqs_enabled &&
158                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
159                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
160             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
161             qemu_irq_raise(ib->irq);
162         }
163         goto out;
164     }
165     ib->waiting_seq = ib->inmsg[2];
166     ib->inmsg[2] = ib->inmsg[1];
167     {
168         IPMIBmcClass *bk = IPMI_BMC_GET_CLASS(ib->bmc);
169         bk->handle_command(ib->bmc, ib->inmsg + 2, ib->inlen - 2,
170                            sizeof(ib->inmsg), ib->waiting_rsp);
171     }
172  out:
173     return;
174 }
175 
176 static void ipmi_bt_handle_rsp(IPMIInterface *ii, uint8_t msg_id,
177                                 unsigned char *rsp, unsigned int rsp_len)
178 {
179     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
180     IPMIBT *ib = iic->get_backend_data(ii);
181 
182     if (ib->waiting_rsp == msg_id) {
183         ib->waiting_rsp++;
184         if (rsp_len > (sizeof(ib->outmsg) - 2)) {
185             ib->outmsg[0] = 4;
186             ib->outmsg[1] = rsp[0];
187             ib->outmsg[2] = ib->waiting_seq;
188             ib->outmsg[3] = rsp[1];
189             ib->outmsg[4] = IPMI_CC_CANNOT_RETURN_REQ_NUM_BYTES;
190             ib->outlen = 5;
191         } else {
192             ib->outmsg[0] = rsp_len + 1;
193             ib->outmsg[1] = rsp[0];
194             ib->outmsg[2] = ib->waiting_seq;
195             memcpy(ib->outmsg + 3, rsp + 1, rsp_len - 1);
196             ib->outlen = rsp_len + 2;
197         }
198         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
199         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
200         if (ib->use_irq && ib->irqs_enabled &&
201                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
202                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
203             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
204             qemu_irq_raise(ib->irq);
205         }
206     }
207 }
208 
209 
210 static uint64_t ipmi_bt_ioport_read(void *opaque, hwaddr addr, unsigned size)
211 {
212     IPMIInterface *ii = opaque;
213     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
214     IPMIBT *ib = iic->get_backend_data(ii);
215     uint32_t ret = 0xff;
216 
217     switch (addr & 3) {
218     case 0:
219         ret = ib->control_reg;
220         break;
221     case 1:
222         if (ib->outpos < ib->outlen) {
223             ret = ib->outmsg[ib->outpos];
224             ib->outpos++;
225             if (ib->outpos == ib->outlen) {
226                 ib->outpos = 0;
227                 ib->outlen = 0;
228             }
229         } else {
230             ret = 0xff;
231         }
232         break;
233     case 2:
234         ret = ib->mask_reg;
235         break;
236     }
237     return ret;
238 }
239 
240 static void ipmi_bt_signal(IPMIBT *ib, IPMIInterface *ii)
241 {
242     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
243 
244     ib->do_wake = 1;
245     while (ib->do_wake) {
246         ib->do_wake = 0;
247         iic->handle_if_event(ii);
248     }
249 }
250 
251 static void ipmi_bt_ioport_write(void *opaque, hwaddr addr, uint64_t val,
252                                  unsigned size)
253 {
254     IPMIInterface *ii = opaque;
255     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
256     IPMIBT *ib = iic->get_backend_data(ii);
257 
258     switch (addr & 3) {
259     case 0:
260         if (IPMI_BT_GET_CLR_WR(val)) {
261             ib->inlen = 0;
262         }
263         if (IPMI_BT_GET_CLR_RD(val)) {
264             ib->outpos = 0;
265         }
266         if (IPMI_BT_GET_B2H_ATN(val)) {
267             IPMI_BT_SET_B2H_ATN(ib->control_reg, 0);
268         }
269         if (IPMI_BT_GET_SMS_ATN(val)) {
270             IPMI_BT_SET_SMS_ATN(ib->control_reg, 0);
271         }
272         if (IPMI_BT_GET_HBUSY(val)) {
273             /* Toggle */
274             IPMI_BT_SET_HBUSY(ib->control_reg,
275                               !IPMI_BT_GET_HBUSY(ib->control_reg));
276         }
277         if (IPMI_BT_GET_H2B_ATN(val)) {
278             IPMI_BT_SET_BBUSY(ib->control_reg, 1);
279             ipmi_bt_signal(ib, ii);
280         }
281         break;
282 
283     case 1:
284         if (ib->inlen < sizeof(ib->inmsg)) {
285             ib->inmsg[ib->inlen] = val;
286         }
287         ib->inlen++;
288         break;
289 
290     case 2:
291         if (IPMI_BT_GET_B2H_IRQ_EN(val) !=
292                         IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
293             if (IPMI_BT_GET_B2H_IRQ_EN(val)) {
294                 if (IPMI_BT_GET_B2H_ATN(ib->control_reg) ||
295                         IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
296                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
297                     qemu_irq_raise(ib->irq);
298                 }
299                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 1);
300             } else {
301                 if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
302                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
303                     qemu_irq_lower(ib->irq);
304                 }
305                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
306             }
307         }
308         if (IPMI_BT_GET_B2H_IRQ(val) && IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
309             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
310             qemu_irq_lower(ib->irq);
311         }
312         break;
313     }
314 }
315 
316 static const MemoryRegionOps ipmi_bt_io_ops = {
317     .read = ipmi_bt_ioport_read,
318     .write = ipmi_bt_ioport_write,
319     .impl = {
320         .min_access_size = 1,
321         .max_access_size = 1,
322     },
323     .endianness = DEVICE_LITTLE_ENDIAN,
324 };
325 
326 static void ipmi_bt_set_atn(IPMIInterface *ii, int val, int irq)
327 {
328     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
329     IPMIBT *ib = iic->get_backend_data(ii);
330 
331     if (!!val == IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
332         return;
333     }
334 
335     IPMI_BT_SET_SMS_ATN(ib->control_reg, val);
336     if (val) {
337         if (irq && ib->use_irq && ib->irqs_enabled &&
338                 !IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
339                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
340             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
341             qemu_irq_raise(ib->irq);
342         }
343     } else {
344         if (!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
345                 IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
346             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
347             qemu_irq_lower(ib->irq);
348         }
349     }
350 }
351 
352 static void ipmi_bt_handle_reset(IPMIInterface *ii, bool is_cold)
353 {
354     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
355     IPMIBT *ib = iic->get_backend_data(ii);
356 
357     if (is_cold) {
358         /* Disable the BT interrupt on reset */
359         if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
360             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
361             qemu_irq_lower(ib->irq);
362         }
363         IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
364     }
365 }
366 
367 static void ipmi_bt_set_irq_enable(IPMIInterface *ii, int val)
368 {
369     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
370     IPMIBT *ib = iic->get_backend_data(ii);
371 
372     ib->irqs_enabled = val;
373 }
374 
375 static void ipmi_bt_init(IPMIInterface *ii, Error **errp)
376 {
377     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
378     IPMIBT *ib = iic->get_backend_data(ii);
379 
380     ib->io_length = 3;
381 
382     memory_region_init_io(&ib->io, NULL, &ipmi_bt_io_ops, ii, "ipmi-bt", 3);
383 }
384 
385 
386 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
387 #define ISA_IPMI_BT(obj) OBJECT_CHECK(ISAIPMIBTDevice, (obj), \
388                                        TYPE_ISA_IPMI_BT)
389 
390 typedef struct ISAIPMIBTDevice {
391     ISADevice dev;
392     int32_t isairq;
393     IPMIBT bt;
394     uint32_t uuid;
395 } ISAIPMIBTDevice;
396 
397 static void ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
398 {
399     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
400 
401     info->interface_name = "bt";
402     info->interface_type = IPMI_SMBIOS_BT;
403     info->ipmi_spec_major_revision = 2;
404     info->ipmi_spec_minor_revision = 0;
405     info->base_address = iib->bt.io_base;
406     info->register_length = iib->bt.io_length;
407     info->register_spacing = 1;
408     info->memspace = IPMI_MEMSPACE_IO;
409     info->irq_type = IPMI_LEVEL_IRQ;
410     info->interrupt_number = iib->isairq;
411     info->i2c_slave_address = iib->bt.bmc->slave_addr;
412     info->uuid = iib->uuid;
413 }
414 
415 static void ipmi_bt_class_init(IPMIInterfaceClass *iic)
416 {
417     iic->init = ipmi_bt_init;
418     iic->set_atn = ipmi_bt_set_atn;
419     iic->handle_rsp = ipmi_bt_handle_rsp;
420     iic->handle_if_event = ipmi_bt_handle_event;
421     iic->set_irq_enable = ipmi_bt_set_irq_enable;
422     iic->reset = ipmi_bt_handle_reset;
423     iic->get_fwinfo = ipmi_bt_get_fwinfo;
424 }
425 
426 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
427 {
428     ISADevice *isadev = ISA_DEVICE(dev);
429     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
430     IPMIInterface *ii = IPMI_INTERFACE(dev);
431     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
432 
433     if (!iib->bt.bmc) {
434         error_setg(errp, "IPMI device requires a bmc attribute to be set");
435         return;
436     }
437 
438     iib->uuid = ipmi_next_uuid();
439 
440     iib->bt.bmc->intf = ii;
441 
442     iic->init(ii, errp);
443     if (*errp)
444         return;
445 
446     if (iib->isairq > 0) {
447         isa_init_irq(isadev, &iib->bt.irq, iib->isairq);
448         iib->bt.use_irq = 1;
449     }
450 
451     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
452 
453     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
454 }
455 
456 static int ipmi_bt_vmstate_post_load(void *opaque, int version)
457 {
458     IPMIBT *ib = opaque;
459 
460     /* Make sure all the values are sane. */
461     if (ib->outpos >= MAX_IPMI_MSG_SIZE || ib->outlen >= MAX_IPMI_MSG_SIZE ||
462         ib->outpos >= ib->outlen) {
463         qemu_log_mask(LOG_GUEST_ERROR,
464                       "ipmi:bt: vmstate transfer received bad out values: %d %d\n",
465                       ib->outpos, ib->outlen);
466         ib->outpos = 0;
467         ib->outlen = 0;
468     }
469 
470     if (ib->inlen >= MAX_IPMI_MSG_SIZE) {
471         qemu_log_mask(LOG_GUEST_ERROR,
472                       "ipmi:bt: vmstate transfer received bad in value: %d\n",
473                       ib->inlen);
474         ib->inlen = 0;
475     }
476 
477     return 0;
478 }
479 
480 const VMStateDescription vmstate_IPMIBT = {
481     .name = TYPE_IPMI_INTERFACE_PREFIX "bt",
482     .version_id = 1,
483     .minimum_version_id = 1,
484     .post_load = ipmi_bt_vmstate_post_load,
485     .fields      = (VMStateField[]) {
486         VMSTATE_BOOL(obf_irq_set, IPMIBT),
487         VMSTATE_BOOL(atn_irq_set, IPMIBT),
488         VMSTATE_BOOL(irqs_enabled, IPMIBT),
489         VMSTATE_UINT32(outpos, IPMIBT),
490         VMSTATE_UINT32(outlen, IPMIBT),
491         VMSTATE_UINT8_ARRAY(outmsg, IPMIBT, MAX_IPMI_MSG_SIZE),
492         VMSTATE_UINT32(inlen, IPMIBT),
493         VMSTATE_UINT8_ARRAY(inmsg, IPMIBT, MAX_IPMI_MSG_SIZE),
494         VMSTATE_UINT8(control_reg, IPMIBT),
495         VMSTATE_UINT8(mask_reg, IPMIBT),
496         VMSTATE_UINT8(waiting_rsp, IPMIBT),
497         VMSTATE_UINT8(waiting_seq, IPMIBT),
498         VMSTATE_END_OF_LIST()
499     }
500 };
501 
502 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
503     .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
504     .version_id = 2,
505     .minimum_version_id = 2,
506     /*
507      * Version 1 had messed up the array transfer, it's not even usable
508      * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
509      * the buffer length, so random things would happen.
510      */
511     .fields      = (VMStateField[]) {
512         VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
513         VMSTATE_END_OF_LIST()
514     }
515 };
516 
517 static void isa_ipmi_bt_init(Object *obj)
518 {
519     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
520 
521     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
522 
523     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
524 }
525 
526 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
527 {
528     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
529 
530     return &iib->bt;
531 }
532 
533 static Property ipmi_isa_properties[] = {
534     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
535     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
536     DEFINE_PROP_END_OF_LIST(),
537 };
538 
539 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
540 {
541     DeviceClass *dc = DEVICE_CLASS(oc);
542     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
543 
544     dc->realize = isa_ipmi_bt_realize;
545     dc->props = ipmi_isa_properties;
546 
547     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
548     ipmi_bt_class_init(iic);
549 }
550 
551 static const TypeInfo isa_ipmi_bt_info = {
552     .name          = TYPE_ISA_IPMI_BT,
553     .parent        = TYPE_ISA_DEVICE,
554     .instance_size = sizeof(ISAIPMIBTDevice),
555     .instance_init = isa_ipmi_bt_init,
556     .class_init    = isa_ipmi_bt_class_init,
557     .interfaces = (InterfaceInfo[]) {
558         { TYPE_IPMI_INTERFACE },
559         { }
560     }
561 };
562 
563 static void ipmi_register_types(void)
564 {
565     type_register_static(&isa_ipmi_bt_info);
566 }
567 
568 type_init(ipmi_register_types)
569