xref: /openbmc/qemu/hw/ipmi/isa_ipmi_bt.c (revision 64552b6b)
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/irq.h"
32 #include "hw/isa/isa.h"
33 
34 /* Control register */
35 #define IPMI_BT_CLR_WR_BIT         0
36 #define IPMI_BT_CLR_RD_BIT         1
37 #define IPMI_BT_H2B_ATN_BIT        2
38 #define IPMI_BT_B2H_ATN_BIT        3
39 #define IPMI_BT_SMS_ATN_BIT        4
40 #define IPMI_BT_HBUSY_BIT          6
41 #define IPMI_BT_BBUSY_BIT          7
42 
43 #define IPMI_BT_GET_CLR_WR(d)      (((d) >> IPMI_BT_CLR_WR_BIT) & 0x1)
44 
45 #define IPMI_BT_GET_CLR_RD(d)      (((d) >> IPMI_BT_CLR_RD_BIT) & 0x1)
46 
47 #define IPMI_BT_GET_H2B_ATN(d)     (((d) >> IPMI_BT_H2B_ATN_BIT) & 0x1)
48 
49 #define IPMI_BT_B2H_ATN_MASK       (1 << IPMI_BT_B2H_ATN_BIT)
50 #define IPMI_BT_GET_B2H_ATN(d)     (((d) >> IPMI_BT_B2H_ATN_BIT) & 0x1)
51 #define IPMI_BT_SET_B2H_ATN(d, v)  ((d) = (((d) & ~IPMI_BT_B2H_ATN_MASK) | \
52                                         (!!(v) << IPMI_BT_B2H_ATN_BIT)))
53 
54 #define IPMI_BT_SMS_ATN_MASK       (1 << IPMI_BT_SMS_ATN_BIT)
55 #define IPMI_BT_GET_SMS_ATN(d)     (((d) >> IPMI_BT_SMS_ATN_BIT) & 0x1)
56 #define IPMI_BT_SET_SMS_ATN(d, v)  ((d) = (((d) & ~IPMI_BT_SMS_ATN_MASK) | \
57                                         (!!(v) << IPMI_BT_SMS_ATN_BIT)))
58 
59 #define IPMI_BT_HBUSY_MASK         (1 << IPMI_BT_HBUSY_BIT)
60 #define IPMI_BT_GET_HBUSY(d)       (((d) >> IPMI_BT_HBUSY_BIT) & 0x1)
61 #define IPMI_BT_SET_HBUSY(d, v)    ((d) = (((d) & ~IPMI_BT_HBUSY_MASK) | \
62                                        (!!(v) << IPMI_BT_HBUSY_BIT)))
63 
64 #define IPMI_BT_BBUSY_MASK         (1 << IPMI_BT_BBUSY_BIT)
65 #define IPMI_BT_SET_BBUSY(d, v)    ((d) = (((d) & ~IPMI_BT_BBUSY_MASK) | \
66                                        (!!(v) << IPMI_BT_BBUSY_BIT)))
67 
68 
69 /* Mask register */
70 #define IPMI_BT_B2H_IRQ_EN_BIT     0
71 #define IPMI_BT_B2H_IRQ_BIT        1
72 
73 #define IPMI_BT_B2H_IRQ_EN_MASK      (1 << IPMI_BT_B2H_IRQ_EN_BIT)
74 #define IPMI_BT_GET_B2H_IRQ_EN(d)    (((d) >> IPMI_BT_B2H_IRQ_EN_BIT) & 0x1)
75 #define IPMI_BT_SET_B2H_IRQ_EN(d, v) ((d) = (((d) & ~IPMI_BT_B2H_IRQ_EN_MASK) |\
76                                         (!!(v) << IPMI_BT_B2H_IRQ_EN_BIT)))
77 
78 #define IPMI_BT_B2H_IRQ_MASK         (1 << IPMI_BT_B2H_IRQ_BIT)
79 #define IPMI_BT_GET_B2H_IRQ(d)       (((d) >> IPMI_BT_B2H_IRQ_BIT) & 0x1)
80 #define IPMI_BT_SET_B2H_IRQ(d, v)    ((d) = (((d) & ~IPMI_BT_B2H_IRQ_MASK) | \
81                                         (!!(v) << IPMI_BT_B2H_IRQ_BIT)))
82 
83 typedef struct IPMIBT {
84     IPMIBmc *bmc;
85 
86     bool do_wake;
87 
88     qemu_irq irq;
89 
90     uint32_t io_base;
91     unsigned long io_length;
92     MemoryRegion io;
93 
94     bool obf_irq_set;
95     bool atn_irq_set;
96     bool use_irq;
97     bool irqs_enabled;
98 
99     uint8_t outmsg[MAX_IPMI_MSG_SIZE];
100     uint32_t outpos;
101     uint32_t outlen;
102 
103     uint8_t inmsg[MAX_IPMI_MSG_SIZE];
104     uint32_t inlen;
105 
106     uint8_t control_reg;
107     uint8_t mask_reg;
108 
109     /*
110      * This is a response number that we send with the command to make
111      * sure that the response matches the command.
112      */
113     uint8_t waiting_rsp;
114     uint8_t waiting_seq;
115 } IPMIBT;
116 
117 #define IPMI_CMD_GET_BT_INTF_CAP        0x36
118 
119 static void ipmi_bt_handle_event(IPMIInterface *ii)
120 {
121     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
122     IPMIBT *ib = iic->get_backend_data(ii);
123 
124     if (ib->inlen < 4) {
125         goto out;
126     }
127     /* Note that overruns are handled by handle_command */
128     if (ib->inmsg[0] != (ib->inlen - 1)) {
129         /* Length mismatch, just ignore. */
130         IPMI_BT_SET_BBUSY(ib->control_reg, 1);
131         ib->inlen = 0;
132         goto out;
133     }
134     if ((ib->inmsg[1] == (IPMI_NETFN_APP << 2)) &&
135                         (ib->inmsg[3] == IPMI_CMD_GET_BT_INTF_CAP)) {
136         /* We handle this one ourselves. */
137         ib->outmsg[0] = 9;
138         ib->outmsg[1] = ib->inmsg[1] | 0x04;
139         ib->outmsg[2] = ib->inmsg[2];
140         ib->outmsg[3] = ib->inmsg[3];
141         ib->outmsg[4] = 0;
142         ib->outmsg[5] = 1; /* Only support 1 outstanding request. */
143         if (sizeof(ib->inmsg) > 0xff) { /* Input buffer size */
144             ib->outmsg[6] = 0xff;
145         } else {
146             ib->outmsg[6] = (unsigned char) sizeof(ib->inmsg);
147         }
148         if (sizeof(ib->outmsg) > 0xff) { /* Output buffer size */
149             ib->outmsg[7] = 0xff;
150         } else {
151             ib->outmsg[7] = (unsigned char) sizeof(ib->outmsg);
152         }
153         ib->outmsg[8] = 10; /* Max request to response time */
154         ib->outmsg[9] = 0; /* Don't recommend retries */
155         ib->outlen = 10;
156         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
157         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
158         if (ib->use_irq && ib->irqs_enabled &&
159                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
160                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
161             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
162             qemu_irq_raise(ib->irq);
163         }
164         goto out;
165     }
166     ib->waiting_seq = ib->inmsg[2];
167     ib->inmsg[2] = ib->inmsg[1];
168     {
169         IPMIBmcClass *bk = IPMI_BMC_GET_CLASS(ib->bmc);
170         bk->handle_command(ib->bmc, ib->inmsg + 2, ib->inlen - 2,
171                            sizeof(ib->inmsg), ib->waiting_rsp);
172     }
173  out:
174     return;
175 }
176 
177 static void ipmi_bt_handle_rsp(IPMIInterface *ii, uint8_t msg_id,
178                                 unsigned char *rsp, unsigned int rsp_len)
179 {
180     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
181     IPMIBT *ib = iic->get_backend_data(ii);
182 
183     if (ib->waiting_rsp == msg_id) {
184         ib->waiting_rsp++;
185         if (rsp_len > (sizeof(ib->outmsg) - 2)) {
186             ib->outmsg[0] = 4;
187             ib->outmsg[1] = rsp[0];
188             ib->outmsg[2] = ib->waiting_seq;
189             ib->outmsg[3] = rsp[1];
190             ib->outmsg[4] = IPMI_CC_CANNOT_RETURN_REQ_NUM_BYTES;
191             ib->outlen = 5;
192         } else {
193             ib->outmsg[0] = rsp_len + 1;
194             ib->outmsg[1] = rsp[0];
195             ib->outmsg[2] = ib->waiting_seq;
196             memcpy(ib->outmsg + 3, rsp + 1, rsp_len - 1);
197             ib->outlen = rsp_len + 2;
198         }
199         IPMI_BT_SET_BBUSY(ib->control_reg, 0);
200         IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
201         if (ib->use_irq && ib->irqs_enabled &&
202                 !IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
203                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
204             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
205             qemu_irq_raise(ib->irq);
206         }
207     }
208 }
209 
210 
211 static uint64_t ipmi_bt_ioport_read(void *opaque, hwaddr addr, unsigned size)
212 {
213     IPMIInterface *ii = opaque;
214     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
215     IPMIBT *ib = iic->get_backend_data(ii);
216     uint32_t ret = 0xff;
217 
218     switch (addr & 3) {
219     case 0:
220         ret = ib->control_reg;
221         break;
222     case 1:
223         if (ib->outpos < ib->outlen) {
224             ret = ib->outmsg[ib->outpos];
225             ib->outpos++;
226             if (ib->outpos == ib->outlen) {
227                 ib->outpos = 0;
228                 ib->outlen = 0;
229             }
230         } else {
231             ret = 0xff;
232         }
233         break;
234     case 2:
235         ret = ib->mask_reg;
236         break;
237     }
238     return ret;
239 }
240 
241 static void ipmi_bt_signal(IPMIBT *ib, IPMIInterface *ii)
242 {
243     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
244 
245     ib->do_wake = 1;
246     while (ib->do_wake) {
247         ib->do_wake = 0;
248         iic->handle_if_event(ii);
249     }
250 }
251 
252 static void ipmi_bt_ioport_write(void *opaque, hwaddr addr, uint64_t val,
253                                  unsigned size)
254 {
255     IPMIInterface *ii = opaque;
256     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
257     IPMIBT *ib = iic->get_backend_data(ii);
258 
259     switch (addr & 3) {
260     case 0:
261         if (IPMI_BT_GET_CLR_WR(val)) {
262             ib->inlen = 0;
263         }
264         if (IPMI_BT_GET_CLR_RD(val)) {
265             ib->outpos = 0;
266         }
267         if (IPMI_BT_GET_B2H_ATN(val)) {
268             IPMI_BT_SET_B2H_ATN(ib->control_reg, 0);
269         }
270         if (IPMI_BT_GET_SMS_ATN(val)) {
271             IPMI_BT_SET_SMS_ATN(ib->control_reg, 0);
272         }
273         if (IPMI_BT_GET_HBUSY(val)) {
274             /* Toggle */
275             IPMI_BT_SET_HBUSY(ib->control_reg,
276                               !IPMI_BT_GET_HBUSY(ib->control_reg));
277         }
278         if (IPMI_BT_GET_H2B_ATN(val)) {
279             IPMI_BT_SET_BBUSY(ib->control_reg, 1);
280             ipmi_bt_signal(ib, ii);
281         }
282         break;
283 
284     case 1:
285         if (ib->inlen < sizeof(ib->inmsg)) {
286             ib->inmsg[ib->inlen] = val;
287         }
288         ib->inlen++;
289         break;
290 
291     case 2:
292         if (IPMI_BT_GET_B2H_IRQ_EN(val) !=
293                         IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
294             if (IPMI_BT_GET_B2H_IRQ_EN(val)) {
295                 if (IPMI_BT_GET_B2H_ATN(ib->control_reg) ||
296                         IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
297                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
298                     qemu_irq_raise(ib->irq);
299                 }
300                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 1);
301             } else {
302                 if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
303                     IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
304                     qemu_irq_lower(ib->irq);
305                 }
306                 IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
307             }
308         }
309         if (IPMI_BT_GET_B2H_IRQ(val) && IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
310             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
311             qemu_irq_lower(ib->irq);
312         }
313         break;
314     }
315 }
316 
317 static const MemoryRegionOps ipmi_bt_io_ops = {
318     .read = ipmi_bt_ioport_read,
319     .write = ipmi_bt_ioport_write,
320     .impl = {
321         .min_access_size = 1,
322         .max_access_size = 1,
323     },
324     .endianness = DEVICE_LITTLE_ENDIAN,
325 };
326 
327 static void ipmi_bt_set_atn(IPMIInterface *ii, int val, int irq)
328 {
329     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
330     IPMIBT *ib = iic->get_backend_data(ii);
331 
332     if (!!val == IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
333         return;
334     }
335 
336     IPMI_BT_SET_SMS_ATN(ib->control_reg, val);
337     if (val) {
338         if (irq && ib->use_irq && ib->irqs_enabled &&
339                 !IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
340                 IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
341             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
342             qemu_irq_raise(ib->irq);
343         }
344     } else {
345         if (!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
346                 IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
347             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
348             qemu_irq_lower(ib->irq);
349         }
350     }
351 }
352 
353 static void ipmi_bt_handle_reset(IPMIInterface *ii, bool is_cold)
354 {
355     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
356     IPMIBT *ib = iic->get_backend_data(ii);
357 
358     if (is_cold) {
359         /* Disable the BT interrupt on reset */
360         if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
361             IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
362             qemu_irq_lower(ib->irq);
363         }
364         IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
365     }
366 }
367 
368 static void ipmi_bt_set_irq_enable(IPMIInterface *ii, int val)
369 {
370     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
371     IPMIBT *ib = iic->get_backend_data(ii);
372 
373     ib->irqs_enabled = val;
374 }
375 
376 static void ipmi_bt_init(IPMIInterface *ii, Error **errp)
377 {
378     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
379     IPMIBT *ib = iic->get_backend_data(ii);
380 
381     ib->io_length = 3;
382 
383     memory_region_init_io(&ib->io, NULL, &ipmi_bt_io_ops, ii, "ipmi-bt", 3);
384 }
385 
386 
387 #define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
388 #define ISA_IPMI_BT(obj) OBJECT_CHECK(ISAIPMIBTDevice, (obj), \
389                                        TYPE_ISA_IPMI_BT)
390 
391 typedef struct ISAIPMIBTDevice {
392     ISADevice dev;
393     int32_t isairq;
394     IPMIBT bt;
395     uint32_t uuid;
396 } ISAIPMIBTDevice;
397 
398 static void ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
399 {
400     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
401 
402     info->interface_name = "bt";
403     info->interface_type = IPMI_SMBIOS_BT;
404     info->ipmi_spec_major_revision = 2;
405     info->ipmi_spec_minor_revision = 0;
406     info->base_address = iib->bt.io_base;
407     info->register_length = iib->bt.io_length;
408     info->register_spacing = 1;
409     info->memspace = IPMI_MEMSPACE_IO;
410     info->irq_type = IPMI_LEVEL_IRQ;
411     info->interrupt_number = iib->isairq;
412     info->i2c_slave_address = iib->bt.bmc->slave_addr;
413     info->uuid = iib->uuid;
414 }
415 
416 static void ipmi_bt_class_init(IPMIInterfaceClass *iic)
417 {
418     iic->init = ipmi_bt_init;
419     iic->set_atn = ipmi_bt_set_atn;
420     iic->handle_rsp = ipmi_bt_handle_rsp;
421     iic->handle_if_event = ipmi_bt_handle_event;
422     iic->set_irq_enable = ipmi_bt_set_irq_enable;
423     iic->reset = ipmi_bt_handle_reset;
424     iic->get_fwinfo = ipmi_bt_get_fwinfo;
425 }
426 
427 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
428 {
429     ISADevice *isadev = ISA_DEVICE(dev);
430     ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
431     IPMIInterface *ii = IPMI_INTERFACE(dev);
432     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
433 
434     if (!iib->bt.bmc) {
435         error_setg(errp, "IPMI device requires a bmc attribute to be set");
436         return;
437     }
438 
439     iib->uuid = ipmi_next_uuid();
440 
441     iib->bt.bmc->intf = ii;
442 
443     iic->init(ii, errp);
444     if (*errp)
445         return;
446 
447     if (iib->isairq > 0) {
448         isa_init_irq(isadev, &iib->bt.irq, iib->isairq);
449         iib->bt.use_irq = 1;
450     }
451 
452     qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
453 
454     isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
455 }
456 
457 static int ipmi_bt_vmstate_post_load(void *opaque, int version)
458 {
459     IPMIBT *ib = opaque;
460 
461     /* Make sure all the values are sane. */
462     if (ib->outpos >= MAX_IPMI_MSG_SIZE || ib->outlen >= MAX_IPMI_MSG_SIZE ||
463         ib->outpos >= ib->outlen) {
464         qemu_log_mask(LOG_GUEST_ERROR,
465                       "ipmi:bt: vmstate transfer received bad out values: %d %d\n",
466                       ib->outpos, ib->outlen);
467         ib->outpos = 0;
468         ib->outlen = 0;
469     }
470 
471     if (ib->inlen >= MAX_IPMI_MSG_SIZE) {
472         qemu_log_mask(LOG_GUEST_ERROR,
473                       "ipmi:bt: vmstate transfer received bad in value: %d\n",
474                       ib->inlen);
475         ib->inlen = 0;
476     }
477 
478     return 0;
479 }
480 
481 const VMStateDescription vmstate_IPMIBT = {
482     .name = TYPE_IPMI_INTERFACE_PREFIX "bt",
483     .version_id = 1,
484     .minimum_version_id = 1,
485     .post_load = ipmi_bt_vmstate_post_load,
486     .fields      = (VMStateField[]) {
487         VMSTATE_BOOL(obf_irq_set, IPMIBT),
488         VMSTATE_BOOL(atn_irq_set, IPMIBT),
489         VMSTATE_BOOL(irqs_enabled, IPMIBT),
490         VMSTATE_UINT32(outpos, IPMIBT),
491         VMSTATE_UINT32(outlen, IPMIBT),
492         VMSTATE_UINT8_ARRAY(outmsg, IPMIBT, MAX_IPMI_MSG_SIZE),
493         VMSTATE_UINT32(inlen, IPMIBT),
494         VMSTATE_UINT8_ARRAY(inmsg, IPMIBT, MAX_IPMI_MSG_SIZE),
495         VMSTATE_UINT8(control_reg, IPMIBT),
496         VMSTATE_UINT8(mask_reg, IPMIBT),
497         VMSTATE_UINT8(waiting_rsp, IPMIBT),
498         VMSTATE_UINT8(waiting_seq, IPMIBT),
499         VMSTATE_END_OF_LIST()
500     }
501 };
502 
503 static const VMStateDescription vmstate_ISAIPMIBTDevice = {
504     .name = TYPE_IPMI_INTERFACE_PREFIX "isa-bt",
505     .version_id = 2,
506     .minimum_version_id = 2,
507     /*
508      * Version 1 had messed up the array transfer, it's not even usable
509      * because it used VMSTATE_VBUFFER_UINT32, but it did not transfer
510      * the buffer length, so random things would happen.
511      */
512     .fields      = (VMStateField[]) {
513         VMSTATE_STRUCT(bt, ISAIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
514         VMSTATE_END_OF_LIST()
515     }
516 };
517 
518 static void isa_ipmi_bt_init(Object *obj)
519 {
520     ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
521 
522     ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
523 
524     vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
525 }
526 
527 static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
528 {
529     ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
530 
531     return &iib->bt;
532 }
533 
534 static Property ipmi_isa_properties[] = {
535     DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base,  0xe4),
536     DEFINE_PROP_INT32("irq",   ISAIPMIBTDevice, isairq,  5),
537     DEFINE_PROP_END_OF_LIST(),
538 };
539 
540 static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
541 {
542     DeviceClass *dc = DEVICE_CLASS(oc);
543     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
544 
545     dc->realize = isa_ipmi_bt_realize;
546     dc->props = ipmi_isa_properties;
547 
548     iic->get_backend_data = isa_ipmi_bt_get_backend_data;
549     ipmi_bt_class_init(iic);
550 }
551 
552 static const TypeInfo isa_ipmi_bt_info = {
553     .name          = TYPE_ISA_IPMI_BT,
554     .parent        = TYPE_ISA_DEVICE,
555     .instance_size = sizeof(ISAIPMIBTDevice),
556     .instance_init = isa_ipmi_bt_init,
557     .class_init    = isa_ipmi_bt_class_init,
558     .interfaces = (InterfaceInfo[]) {
559         { TYPE_IPMI_INTERFACE },
560         { }
561     }
562 };
563 
564 static void ipmi_register_types(void)
565 {
566     type_register_static(&isa_ipmi_bt_info);
567 }
568 
569 type_init(ipmi_register_types)
570