xref: /qemu/hw/ipmi/isa_ipmi_bt.c (revision 7a4e543d)
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 #include "qemu/osdep.h"
25 #include "hw/hw.h"
26 #include "hw/ipmi/ipmi.h"
27 #include "hw/isa/isa.h"
28 #include "hw/i386/pc.h"
29 
30 /* Control register */
31 #define IPMI_BT_CLR_WR_BIT         0
32 #define IPMI_BT_CLR_RD_BIT         1
33 #define IPMI_BT_H2B_ATN_BIT        2
34 #define IPMI_BT_B2H_ATN_BIT        3
35 #define IPMI_BT_SMS_ATN_BIT        4
36 #define IPMI_BT_HBUSY_BIT          6
37 #define IPMI_BT_BBUSY_BIT          7
38 
39 #define IPMI_BT_CLR_WR_MASK        (1 << IPMI_BT_CLR_WR_BIT)
40 #define IPMI_BT_GET_CLR_WR(d)      (((d) >> IPMI_BT_CLR_WR_BIT) & 0x1)
41 #define IPMI_BT_SET_CLR_WR(d, v)   (d) = (((d) & ~IPMI_BT_CLR_WR_MASK) | \
42                                        (((v & 1) << IPMI_BT_CLR_WR_BIT)))
43 
44 #define IPMI_BT_CLR_RD_MASK        (1 << IPMI_BT_CLR_RD_BIT)
45 #define IPMI_BT_GET_CLR_RD(d)      (((d) >> IPMI_BT_CLR_RD_BIT) & 0x1)
46 #define IPMI_BT_SET_CLR_RD(d, v)   (d) = (((d) & ~IPMI_BT_CLR_RD_MASK) | \
47                                        (((v & 1) << IPMI_BT_CLR_RD_BIT)))
48 
49 #define IPMI_BT_H2B_ATN_MASK       (1 << IPMI_BT_H2B_ATN_BIT)
50 #define IPMI_BT_GET_H2B_ATN(d)     (((d) >> IPMI_BT_H2B_ATN_BIT) & 0x1)
51 #define IPMI_BT_SET_H2B_ATN(d, v)  (d) = (((d) & ~IPMI_BT_H2B_ATN_MASK) | \
52                                         (((v & 1) << IPMI_BT_H2B_ATN_BIT)))
53 
54 #define IPMI_BT_B2H_ATN_MASK       (1 << IPMI_BT_B2H_ATN_BIT)
55 #define IPMI_BT_GET_B2H_ATN(d)     (((d) >> IPMI_BT_B2H_ATN_BIT) & 0x1)
56 #define IPMI_BT_SET_B2H_ATN(d, v)  (d) = (((d) & ~IPMI_BT_B2H_ATN_MASK) | \
57                                         (((v & 1) << IPMI_BT_B2H_ATN_BIT)))
58 
59 #define IPMI_BT_SMS_ATN_MASK       (1 << IPMI_BT_SMS_ATN_BIT)
60 #define IPMI_BT_GET_SMS_ATN(d)     (((d) >> IPMI_BT_SMS_ATN_BIT) & 0x1)
61 #define IPMI_BT_SET_SMS_ATN(d, v)  (d) = (((d) & ~IPMI_BT_SMS_ATN_MASK) | \
62                                         (((v & 1) << IPMI_BT_SMS_ATN_BIT)))
63 
64 #define IPMI_BT_HBUSY_MASK         (1 << IPMI_BT_HBUSY_BIT)
65 #define IPMI_BT_GET_HBUSY(d)       (((d) >> IPMI_BT_HBUSY_BIT) & 0x1)
66 #define IPMI_BT_SET_HBUSY(d, v)    (d) = (((d) & ~IPMI_BT_HBUSY_MASK) | \
67                                        (((v & 1) << IPMI_BT_HBUSY_BIT)))
68 
69 #define IPMI_BT_BBUSY_MASK         (1 << IPMI_BT_BBUSY_BIT)
70 #define IPMI_BT_GET_BBUSY(d)       (((d) >> IPMI_BT_BBUSY_BIT) & 0x1)
71 #define IPMI_BT_SET_BBUSY(d, v)    (d) = (((d) & ~IPMI_BT_BBUSY_MASK) | \
72                                        (((v & 1) << IPMI_BT_BBUSY_BIT)))
73 
74 
75 /* Mask register */
76 #define IPMI_BT_B2H_IRQ_EN_BIT     0
77 #define IPMI_BT_B2H_IRQ_BIT        1
78 
79 #define IPMI_BT_B2H_IRQ_EN_MASK      (1 << IPMI_BT_B2H_IRQ_EN_BIT)
80 #define IPMI_BT_GET_B2H_IRQ_EN(d)    (((d) >> IPMI_BT_B2H_IRQ_EN_BIT) & 0x1)
81 #define IPMI_BT_SET_B2H_IRQ_EN(d, v) (d) = (((d) & ~IPMI_BT_B2H_IRQ_EN_MASK) | \
82                                         (((v & 1) << IPMI_BT_B2H_IRQ_EN_BIT)))
83 
84 #define IPMI_BT_B2H_IRQ_MASK         (1 << IPMI_BT_B2H_IRQ_BIT)
85 #define IPMI_BT_GET_B2H_IRQ(d)       (((d) >> IPMI_BT_B2H_IRQ_BIT) & 0x1)
86 #define IPMI_BT_SET_B2H_IRQ(d, v)    (d) = (((d) & ~IPMI_BT_B2H_IRQ_MASK) | \
87                                         (((v & 1) << IPMI_BT_B2H_IRQ_BIT)))
88 
89 typedef struct IPMIBT {
90     IPMIBmc *bmc;
91 
92     bool do_wake;
93 
94     qemu_irq irq;
95 
96     uint32_t io_base;
97     unsigned long io_length;
98     MemoryRegion io;
99 
100     bool obf_irq_set;
101     bool atn_irq_set;
102     bool use_irq;
103     bool irqs_enabled;
104 
105     uint8_t outmsg[MAX_IPMI_MSG_SIZE];
106     uint32_t outpos;
107     uint32_t outlen;
108 
109     uint8_t inmsg[MAX_IPMI_MSG_SIZE];
110     uint32_t inlen;
111 
112     uint8_t control_reg;
113     uint8_t mask_reg;
114 
115     /*
116      * This is a response number that we send with the command to make
117      * sure that the response matches the command.
118      */
119     uint8_t waiting_rsp;
120     uint8_t waiting_seq;
121 } IPMIBT;
122 
123 #define IPMI_CMD_GET_BT_INTF_CAP        0x36
124 
125 static void ipmi_bt_handle_event(IPMIInterface *ii)
126 {
127     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
128     IPMIBT *ib = iic->get_backend_data(ii);
129 
130     if (ib->inlen < 4) {
131         goto out;
132     }
133     /* Note that overruns are handled by handle_command */
134     if (ib->inmsg[0] != (ib->inlen - 1)) {
135         /* Length mismatch, just ignore. */
136         IPMI_BT_SET_BBUSY(ib->control_reg, 1);
137         ib->inlen = 0;
138         goto out;
139     }
140     if ((ib->inmsg[1] == (IPMI_NETFN_APP << 2)) &&
141                         (ib->inmsg[3] == IPMI_CMD_GET_BT_INTF_CAP)) {
142         /* We handle this one ourselves. */
143         ib->outmsg[0] = 9;
144         ib->outmsg[1] = ib->inmsg[1] | 0x04;
145         ib->outmsg[2] = ib->inmsg[2];
146         ib->outmsg[3] = ib->inmsg[3];
147         ib->outmsg[4] = 0;
148         ib->outmsg[5] = 1; /* Only support 1 outstanding request. */
149         if (sizeof(ib->inmsg) > 0xff) { /* Input buffer size */
150             ib->outmsg[6] = 0xff;
151         } else {
152             ib->outmsg[6] = (unsigned char) sizeof(ib->inmsg);
153         }
154         if (sizeof(ib->outmsg) > 0xff) { /* Output buffer size */
155             ib->outmsg[7] = 0xff;
156         } else {
157             ib->outmsg[7] = (unsigned char) sizeof(ib->outmsg);
158         }
159         ib->outmsg[8] = 10; /* Max request to response time */
160         ib->outmsg[9] = 0; /* Don't recommend retries */
161         ib->outlen = 10;
162         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
163         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
164         if (ib->use_irq && ib->irqs_enabled &&
165                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
166                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
167             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
168             qemu_irq_raise(ib->irq);
169         }
170         goto out;
171     }
172     ib->waiting_seq = ib->inmsg[2];
173     ib->inmsg[2] = ib->inmsg[1];
174     {
175         IPMIBmcClass *bk = IPMI_BMC_GET_CLASS(ib->bmc);
176         bk->handle_command(ib->bmc, ib->inmsg + 2, ib->inlen - 2,
177                            sizeof(ib->inmsg), ib->waiting_rsp);
178     }
179  out:
180     return;
181 }
182 
183 static void ipmi_bt_handle_rsp(IPMIInterface *ii, uint8_t msg_id,
184                                 unsigned char *rsp, unsigned int rsp_len)
185 {
186     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
187     IPMIBT *ib = iic->get_backend_data(ii);
188 
189     if (ib->waiting_rsp == msg_id) {
190         ib->waiting_rsp++;
191         if (rsp_len > (sizeof(ib->outmsg) - 2)) {
192             ib->outmsg[0] = 4;
193             ib->outmsg[1] = rsp[0];
194             ib->outmsg[2] = ib->waiting_seq;
195             ib->outmsg[3] = rsp[1];
196             ib->outmsg[4] = IPMI_CC_CANNOT_RETURN_REQ_NUM_BYTES;
197             ib->outlen = 5;
198         } else {
199             ib->outmsg[0] = rsp_len + 1;
200             ib->outmsg[1] = rsp[0];
201             ib->outmsg[2] = ib->waiting_seq;
202             memcpy(ib->outmsg + 3, rsp + 1, rsp_len - 1);
203             ib->outlen = rsp_len + 2;
204         }
205         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
206         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
207         if (ib->use_irq && ib->irqs_enabled &&
208                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
209                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
210             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
211             qemu_irq_raise(ib->irq);
212         }
213     }
214 }
215 
216 
217 static uint64_t ipmi_bt_ioport_read(void *opaque, hwaddr addr, unsigned size)
218 {
219     IPMIInterface *ii = opaque;
220     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
221     IPMIBT *ib = iic->get_backend_data(ii);
222     uint32_t ret = 0xff;
223 
224     switch (addr & 3) {
225     case 0:
226         ret = ib->control_reg;
227         break;
228     case 1:
229         if (ib->outpos < ib->outlen) {
230             ret = ib->outmsg[ib->outpos];
231             ib->outpos++;
232             if (ib->outpos == ib->outlen) {
233                 ib->outpos = 0;
234                 ib->outlen = 0;
235             }
236         } else {
237             ret = 0xff;
238         }
239         break;
240     case 2:
241         ret = ib->mask_reg;
242         break;
243     }
244     return ret;
245 }
246 
247 static void ipmi_bt_signal(IPMIBT *ib, IPMIInterface *ii)
248 {
249     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
250 
251     ib->do_wake = 1;
252     while (ib->do_wake) {
253         ib->do_wake = 0;
254         iic->handle_if_event(ii);
255     }
256 }
257 
258 static void ipmi_bt_ioport_write(void *opaque, hwaddr addr, uint64_t val,
259                                  unsigned size)
260 {
261     IPMIInterface *ii = opaque;
262     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
263     IPMIBT *ib = iic->get_backend_data(ii);
264 
265     switch (addr & 3) {
266     case 0:
267         if (IPMI_BT_GET_CLR_WR(val)) {
268             ib->inlen = 0;
269         }
270         if (IPMI_BT_GET_CLR_RD(val)) {
271             ib->outpos = 0;
272         }
273         if (IPMI_BT_GET_B2H_ATN(val)) {
274             IPMI_BT_SET_B2H_ATN(ib->control_reg, 0);
275         }
276         if (IPMI_BT_GET_SMS_ATN(val)) {
277             IPMI_BT_SET_SMS_ATN(ib->control_reg, 0);
278         }
279         if (IPMI_BT_GET_HBUSY(val)) {
280             /* Toggle */
281             IPMI_BT_SET_HBUSY(ib->control_reg,
282                               !IPMI_BT_GET_HBUSY(ib->control_reg));
283         }
284         if (IPMI_BT_GET_H2B_ATN(val)) {
285             IPMI_BT_SET_BBUSY(ib->control_reg, 1);
286             ipmi_bt_signal(ib, ii);
287         }
288         break;
289 
290     case 1:
291         if (ib->inlen < sizeof(ib->inmsg)) {
292             ib->inmsg[ib->inlen] = val;
293         }
294         ib->inlen++;
295         break;
296 
297     case 2:
298         if (IPMI_BT_GET_B2H_IRQ_EN(val) !=
299                         IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
300             if (IPMI_BT_GET_B2H_IRQ_EN(val)) {
301                 if (IPMI_BT_GET_B2H_ATN(ib->control_reg) ||
302                         IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
303                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
304                     qemu_irq_raise(ib->irq);
305                 }
306                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 1);
307             } else {
308                 if (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                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
313             }
314         }
315         if (IPMI_BT_GET_B2H_IRQ(val) && IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
316             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
317             qemu_irq_lower(ib->irq);
318         }
319         break;
320     }
321 }
322 
323 static const MemoryRegionOps ipmi_bt_io_ops = {
324     .read = ipmi_bt_ioport_read,
325     .write = ipmi_bt_ioport_write,
326     .impl = {
327         .min_access_size = 1,
328         .max_access_size = 1,
329     },
330     .endianness = DEVICE_LITTLE_ENDIAN,
331 };
332 
333 static void ipmi_bt_set_atn(IPMIInterface *ii, int val, int irq)
334 {
335     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
336     IPMIBT *ib = iic->get_backend_data(ii);
337 
338     if (!!val == IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
339         return;
340     }
341 
342     IPMI_BT_SET_SMS_ATN(ib->control_reg, val);
343     if (val) {
344         if (irq && ib->use_irq && ib->irqs_enabled &&
345                 !IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
346                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
347             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
348             qemu_irq_raise(ib->irq);
349         }
350     } else {
351         if (!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
352                 IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
353             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
354             qemu_irq_lower(ib->irq);
355         }
356     }
357 }
358 
359 static void ipmi_bt_handle_reset(IPMIInterface *ii, bool is_cold)
360 {
361     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
362     IPMIBT *ib = iic->get_backend_data(ii);
363 
364     if (is_cold) {
365         /* Disable the BT interrupt on reset */
366         if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
367             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
368             qemu_irq_lower(ib->irq);
369         }
370         IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
371     }
372 }
373 
374 static void ipmi_bt_set_irq_enable(IPMIInterface *ii, int val)
375 {
376     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
377     IPMIBT *ib = iic->get_backend_data(ii);
378 
379     ib->irqs_enabled = val;
380 }
381 
382 static void ipmi_bt_init(IPMIInterface *ii, Error **errp)
383 {
384     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
385     IPMIBT *ib = iic->get_backend_data(ii);
386 
387     ib->io_length = 3;
388 
389     memory_region_init_io(&ib->io, NULL, &ipmi_bt_io_ops, ii, "ipmi-bt", 3);
390 }
391 
392 static void ipmi_bt_class_init(IPMIInterfaceClass *iic)
393 {
394     iic->init = ipmi_bt_init;
395     iic->set_atn = ipmi_bt_set_atn;
396     iic->handle_rsp = ipmi_bt_handle_rsp;
397     iic->handle_if_event = ipmi_bt_handle_event;
398     iic->set_irq_enable = ipmi_bt_set_irq_enable;
399     iic->reset = ipmi_bt_handle_reset;
400 }
401 
402 
403 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
404 #define ISA_IPMI_BT(obj) OBJECT_CHECK(ISAIPMIBTDevice, (obj), \
405                                        TYPE_ISA_IPMI_BT)
406 
407 typedef struct ISAIPMIBTDevice {
408     ISADevice dev;
409     int32_t isairq;
410     IPMIBT bt;
411     IPMIFwInfo fwinfo;
412 } ISAIPMIBTDevice;
413 
414 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
415 {
416     ISADevice *isadev = ISA_DEVICE(dev);
417     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
418     IPMIInterface *ii = IPMI_INTERFACE(dev);
419     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
420 
421     if (!iib->bt.bmc) {
422         error_setg(errp, "IPMI device requires a bmc attribute to be set");
423         return;
424     }
425 
426     iib->bt.bmc->intf = ii;
427 
428     iic->init(ii, errp);
429     if (*errp)
430         return;
431 
432     if (iib->isairq > 0) {
433         isa_init_irq(isadev, &iib->bt.irq, iib->isairq);
434         iib->bt.use_irq = 1;
435     }
436 
437     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
438 
439     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
440 
441     iib->fwinfo.interface_name = "bt";
442     iib->fwinfo.interface_type = IPMI_SMBIOS_BT;
443     iib->fwinfo.ipmi_spec_major_revision = 2;
444     iib->fwinfo.ipmi_spec_minor_revision = 0;
445     iib->fwinfo.base_address = iib->bt.io_base;
446     iib->fwinfo.register_length = iib->bt.io_length;
447     iib->fwinfo.register_spacing = 1;
448     iib->fwinfo.memspace = IPMI_MEMSPACE_IO;
449     iib->fwinfo.irq_type = IPMI_LEVEL_IRQ;
450     iib->fwinfo.interrupt_number = iib->isairq;
451     iib->fwinfo.acpi_parent = "\\_SB.PCI0.ISA";
452     iib->fwinfo.i2c_slave_address = iib->bt.bmc->slave_addr;
453     ipmi_add_fwinfo(&iib->fwinfo, errp);
454 }
455 
456 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
457     .name = TYPE_IPMI_INTERFACE,
458     .version_id = 1,
459     .minimum_version_id = 1,
460     .fields      = (VMStateField[]) {
461         VMSTATE_BOOL(bt.obf_irq_set, ISAIPMIBTDevice),
462         VMSTATE_BOOL(bt.atn_irq_set, ISAIPMIBTDevice),
463         VMSTATE_BOOL(bt.use_irq, ISAIPMIBTDevice),
464         VMSTATE_BOOL(bt.irqs_enabled, ISAIPMIBTDevice),
465         VMSTATE_UINT32(bt.outpos, ISAIPMIBTDevice),
466         VMSTATE_VBUFFER_UINT32(bt.outmsg, ISAIPMIBTDevice, 1, NULL, 0,
467                                bt.outlen),
468         VMSTATE_VBUFFER_UINT32(bt.inmsg, ISAIPMIBTDevice, 1, NULL, 0,
469                                bt.inlen),
470         VMSTATE_UINT8(bt.control_reg, ISAIPMIBTDevice),
471         VMSTATE_UINT8(bt.mask_reg, ISAIPMIBTDevice),
472         VMSTATE_UINT8(bt.waiting_rsp, ISAIPMIBTDevice),
473         VMSTATE_UINT8(bt.waiting_seq, ISAIPMIBTDevice),
474         VMSTATE_END_OF_LIST()
475     }
476 };
477 
478 static void isa_ipmi_bt_init(Object *obj)
479 {
480     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
481 
482     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
483 
484     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
485 }
486 
487 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
488 {
489     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
490 
491     return &iib->bt;
492 }
493 
494 static Property ipmi_isa_properties[] = {
495     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
496     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
497     DEFINE_PROP_END_OF_LIST(),
498 };
499 
500 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
501 {
502     DeviceClass *dc = DEVICE_CLASS(oc);
503     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
504 
505     dc->realize = isa_ipmi_bt_realize;
506     dc->props = ipmi_isa_properties;
507 
508     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
509     ipmi_bt_class_init(iic);
510 }
511 
512 static const TypeInfo isa_ipmi_bt_info = {
513     .name          = TYPE_ISA_IPMI_BT,
514     .parent        = TYPE_ISA_DEVICE,
515     .instance_size = sizeof(ISAIPMIBTDevice),
516     .instance_init = isa_ipmi_bt_init,
517     .class_init    = isa_ipmi_bt_class_init,
518     .interfaces = (InterfaceInfo[]) {
519         { TYPE_IPMI_INTERFACE },
520         { }
521     }
522 };
523 
524 static void ipmi_register_types(void)
525 {
526     type_register_static(&isa_ipmi_bt_info);
527 }
528 
529 type_init(ipmi_register_types)
530