root / hw / spapr_vio.c @ 0834c9ea
History | View | Annotate | Download (16.6 kB)
1 |
/*
|
---|---|
2 |
* QEMU sPAPR VIO code
|
3 |
*
|
4 |
* Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
|
5 |
* Based on the s390 virtio bus code:
|
6 |
* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
|
7 |
*
|
8 |
* This library is free software; you can redistribute it and/or
|
9 |
* modify it under the terms of the GNU Lesser General Public
|
10 |
* License as published by the Free Software Foundation; either
|
11 |
* version 2 of the License, or (at your option) any later version.
|
12 |
*
|
13 |
* This library is distributed in the hope that it will be useful,
|
14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
16 |
* Lesser General Public License for more details.
|
17 |
*
|
18 |
* You should have received a copy of the GNU Lesser General Public
|
19 |
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
20 |
*/
|
21 |
|
22 |
#include "hw.h" |
23 |
#include "sysemu.h" |
24 |
#include "boards.h" |
25 |
#include "monitor.h" |
26 |
#include "loader.h" |
27 |
#include "elf.h" |
28 |
#include "hw/sysbus.h" |
29 |
#include "kvm.h" |
30 |
#include "device_tree.h" |
31 |
#include "kvm_ppc.h" |
32 |
|
33 |
#include "hw/spapr.h" |
34 |
#include "hw/spapr_vio.h" |
35 |
#include "hw/xics.h" |
36 |
|
37 |
#ifdef CONFIG_FDT
|
38 |
#include <libfdt.h> |
39 |
#endif /* CONFIG_FDT */ |
40 |
|
41 |
/* #define DEBUG_SPAPR */
|
42 |
|
43 |
#ifdef DEBUG_SPAPR
|
44 |
#define dprintf(fmt, ...) \
|
45 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
46 |
#else
|
47 |
#define dprintf(fmt, ...) \
|
48 |
do { } while (0) |
49 |
#endif
|
50 |
|
51 |
static Property spapr_vio_props[] = {
|
52 |
DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \ |
53 |
DEFINE_PROP_END_OF_LIST(), |
54 |
}; |
55 |
|
56 |
static const TypeInfo spapr_vio_bus_info = { |
57 |
.name = TYPE_SPAPR_VIO_BUS, |
58 |
.parent = TYPE_BUS, |
59 |
.instance_size = sizeof(VIOsPAPRBus),
|
60 |
}; |
61 |
|
62 |
VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg) |
63 |
{ |
64 |
BusChild *kid; |
65 |
VIOsPAPRDevice *dev = NULL;
|
66 |
|
67 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
68 |
dev = (VIOsPAPRDevice *)kid->child; |
69 |
if (dev->reg == reg) {
|
70 |
return dev;
|
71 |
} |
72 |
} |
73 |
|
74 |
return NULL; |
75 |
} |
76 |
|
77 |
static char *vio_format_dev_name(VIOsPAPRDevice *dev) |
78 |
{ |
79 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
80 |
char *name;
|
81 |
|
82 |
/* Device tree style name device@reg */
|
83 |
if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) { |
84 |
return NULL; |
85 |
} |
86 |
|
87 |
return name;
|
88 |
} |
89 |
|
90 |
#ifdef CONFIG_FDT
|
91 |
static int vio_make_devnode(VIOsPAPRDevice *dev, |
92 |
void *fdt)
|
93 |
{ |
94 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
95 |
int vdevice_off, node_off, ret;
|
96 |
char *dt_name;
|
97 |
|
98 |
vdevice_off = fdt_path_offset(fdt, "/vdevice");
|
99 |
if (vdevice_off < 0) { |
100 |
return vdevice_off;
|
101 |
} |
102 |
|
103 |
dt_name = vio_format_dev_name(dev); |
104 |
if (!dt_name) {
|
105 |
return -ENOMEM;
|
106 |
} |
107 |
|
108 |
node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); |
109 |
free(dt_name); |
110 |
if (node_off < 0) { |
111 |
return node_off;
|
112 |
} |
113 |
|
114 |
ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
|
115 |
if (ret < 0) { |
116 |
return ret;
|
117 |
} |
118 |
|
119 |
if (pc->dt_type) {
|
120 |
ret = fdt_setprop_string(fdt, node_off, "device_type",
|
121 |
pc->dt_type); |
122 |
if (ret < 0) { |
123 |
return ret;
|
124 |
} |
125 |
} |
126 |
|
127 |
if (pc->dt_compatible) {
|
128 |
ret = fdt_setprop_string(fdt, node_off, "compatible",
|
129 |
pc->dt_compatible); |
130 |
if (ret < 0) { |
131 |
return ret;
|
132 |
} |
133 |
} |
134 |
|
135 |
if (dev->irq) {
|
136 |
uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};
|
137 |
|
138 |
ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
|
139 |
sizeof(ints_prop));
|
140 |
if (ret < 0) { |
141 |
return ret;
|
142 |
} |
143 |
} |
144 |
|
145 |
ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->dma);
|
146 |
if (ret < 0) { |
147 |
return ret;
|
148 |
} |
149 |
|
150 |
if (pc->devnode) {
|
151 |
ret = (pc->devnode)(dev, fdt, node_off); |
152 |
if (ret < 0) { |
153 |
return ret;
|
154 |
} |
155 |
} |
156 |
|
157 |
return node_off;
|
158 |
} |
159 |
#endif /* CONFIG_FDT */ |
160 |
|
161 |
/*
|
162 |
* CRQ handling
|
163 |
*/
|
164 |
static target_ulong h_reg_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
165 |
target_ulong opcode, target_ulong *args) |
166 |
{ |
167 |
target_ulong reg = args[0];
|
168 |
target_ulong queue_addr = args[1];
|
169 |
target_ulong queue_len = args[2];
|
170 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
171 |
|
172 |
if (!dev) {
|
173 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
174 |
return H_PARAMETER;
|
175 |
} |
176 |
|
177 |
/* We can't grok a queue size bigger than 256M for now */
|
178 |
if (queue_len < 0x1000 || queue_len > 0x10000000) { |
179 |
hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
|
180 |
")\n", queue_len);
|
181 |
return H_PARAMETER;
|
182 |
} |
183 |
|
184 |
/* Check queue alignment */
|
185 |
if (queue_addr & 0xfff) { |
186 |
hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr); |
187 |
return H_PARAMETER;
|
188 |
} |
189 |
|
190 |
/* Check if device supports CRQs */
|
191 |
if (!dev->crq.SendFunc) {
|
192 |
hcall_dprintf("Device does not support CRQ\n");
|
193 |
return H_NOT_FOUND;
|
194 |
} |
195 |
|
196 |
/* Already a queue ? */
|
197 |
if (dev->crq.qsize) {
|
198 |
hcall_dprintf("CRQ already registered\n");
|
199 |
return H_RESOURCE;
|
200 |
} |
201 |
dev->crq.qladdr = queue_addr; |
202 |
dev->crq.qsize = queue_len; |
203 |
dev->crq.qnext = 0;
|
204 |
|
205 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
206 |
TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
207 |
reg, queue_addr, queue_len); |
208 |
return H_SUCCESS;
|
209 |
} |
210 |
|
211 |
static target_ulong free_crq(VIOsPAPRDevice *dev)
|
212 |
{ |
213 |
dev->crq.qladdr = 0;
|
214 |
dev->crq.qsize = 0;
|
215 |
dev->crq.qnext = 0;
|
216 |
|
217 |
dprintf("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg); |
218 |
|
219 |
return H_SUCCESS;
|
220 |
} |
221 |
|
222 |
static target_ulong h_free_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
223 |
target_ulong opcode, target_ulong *args) |
224 |
{ |
225 |
target_ulong reg = args[0];
|
226 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
227 |
|
228 |
if (!dev) {
|
229 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
230 |
return H_PARAMETER;
|
231 |
} |
232 |
|
233 |
return free_crq(dev);
|
234 |
} |
235 |
|
236 |
static target_ulong h_send_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
237 |
target_ulong opcode, target_ulong *args) |
238 |
{ |
239 |
target_ulong reg = args[0];
|
240 |
target_ulong msg_hi = args[1];
|
241 |
target_ulong msg_lo = args[2];
|
242 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
243 |
uint64_t crq_mangle[2];
|
244 |
|
245 |
if (!dev) {
|
246 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
247 |
return H_PARAMETER;
|
248 |
} |
249 |
crq_mangle[0] = cpu_to_be64(msg_hi);
|
250 |
crq_mangle[1] = cpu_to_be64(msg_lo);
|
251 |
|
252 |
if (dev->crq.SendFunc) {
|
253 |
return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
|
254 |
} |
255 |
|
256 |
return H_HARDWARE;
|
257 |
} |
258 |
|
259 |
static target_ulong h_enable_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
260 |
target_ulong opcode, target_ulong *args) |
261 |
{ |
262 |
target_ulong reg = args[0];
|
263 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
264 |
|
265 |
if (!dev) {
|
266 |
hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
267 |
return H_PARAMETER;
|
268 |
} |
269 |
|
270 |
return 0; |
271 |
} |
272 |
|
273 |
/* Returns negative error, 0 success, or positive: queue full */
|
274 |
int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
|
275 |
{ |
276 |
int rc;
|
277 |
uint8_t byte; |
278 |
|
279 |
if (!dev->crq.qsize) {
|
280 |
fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
|
281 |
return -1; |
282 |
} |
283 |
|
284 |
/* Maybe do a fast path for KVM just writing to the pages */
|
285 |
rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
|
286 |
if (rc) {
|
287 |
return rc;
|
288 |
} |
289 |
if (byte != 0) { |
290 |
return 1; |
291 |
} |
292 |
|
293 |
rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
|
294 |
&crq[8], 8); |
295 |
if (rc) {
|
296 |
return rc;
|
297 |
} |
298 |
|
299 |
kvmppc_eieio(); |
300 |
|
301 |
rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
|
302 |
if (rc) {
|
303 |
return rc;
|
304 |
} |
305 |
|
306 |
dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
|
307 |
|
308 |
if (dev->signal_state & 1) { |
309 |
qemu_irq_pulse(spapr_vio_qirq(dev)); |
310 |
} |
311 |
|
312 |
return 0; |
313 |
} |
314 |
|
315 |
/* "quiesce" handling */
|
316 |
|
317 |
static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
318 |
{ |
319 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
320 |
uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg; |
321 |
|
322 |
if (dev->dma) {
|
323 |
spapr_tce_free(dev->dma); |
324 |
} |
325 |
dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size); |
326 |
|
327 |
dev->crq.qladdr = 0;
|
328 |
dev->crq.qsize = 0;
|
329 |
dev->crq.qnext = 0;
|
330 |
} |
331 |
|
332 |
static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
333 |
uint32_t nargs, target_ulong args, |
334 |
uint32_t nret, target_ulong rets) |
335 |
{ |
336 |
VIOsPAPRBus *bus = spapr->vio_bus; |
337 |
VIOsPAPRDevice *dev; |
338 |
uint32_t unit, enable; |
339 |
|
340 |
if (nargs != 2) { |
341 |
rtas_st(rets, 0, -3); |
342 |
return;
|
343 |
} |
344 |
unit = rtas_ld(args, 0);
|
345 |
enable = rtas_ld(args, 1);
|
346 |
dev = spapr_vio_find_by_reg(bus, unit); |
347 |
if (!dev) {
|
348 |
rtas_st(rets, 0, -3); |
349 |
return;
|
350 |
} |
351 |
if (enable) {
|
352 |
spapr_tce_free(dev->dma); |
353 |
dev->dma = NULL;
|
354 |
} else {
|
355 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
356 |
uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg; |
357 |
|
358 |
dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size); |
359 |
} |
360 |
|
361 |
rtas_st(rets, 0, 0); |
362 |
} |
363 |
|
364 |
static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
365 |
uint32_t nargs, target_ulong args, |
366 |
uint32_t nret, target_ulong rets) |
367 |
{ |
368 |
VIOsPAPRBus *bus = spapr->vio_bus; |
369 |
BusChild *kid; |
370 |
VIOsPAPRDevice *dev = NULL;
|
371 |
|
372 |
if (nargs != 0) { |
373 |
rtas_st(rets, 0, -3); |
374 |
return;
|
375 |
} |
376 |
|
377 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
378 |
dev = (VIOsPAPRDevice *)kid->child; |
379 |
spapr_vio_quiesce_one(dev); |
380 |
} |
381 |
|
382 |
rtas_st(rets, 0, 0); |
383 |
} |
384 |
|
385 |
static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
|
386 |
{ |
387 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
388 |
BusChild *kid; |
389 |
VIOsPAPRDevice *other; |
390 |
|
391 |
/*
|
392 |
* Check for a device other than the given one which is already
|
393 |
* using the requested address. We have to open code this because
|
394 |
* the given dev might already be in the list.
|
395 |
*/
|
396 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
397 |
other = DO_UPCAST(VIOsPAPRDevice, qdev, kid->child); |
398 |
|
399 |
if (other != dev && other->reg == dev->reg) {
|
400 |
return other;
|
401 |
} |
402 |
} |
403 |
|
404 |
return 0; |
405 |
} |
406 |
|
407 |
static void spapr_vio_busdev_reset(DeviceState *qdev) |
408 |
{ |
409 |
VIOsPAPRDevice *dev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev); |
410 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
411 |
|
412 |
if (dev->crq.qsize) {
|
413 |
free_crq(dev); |
414 |
} |
415 |
|
416 |
if (pc->reset) {
|
417 |
pc->reset(dev); |
418 |
} |
419 |
} |
420 |
|
421 |
static int spapr_vio_busdev_init(DeviceState *qdev) |
422 |
{ |
423 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
424 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
425 |
uint32_t liobn; |
426 |
char *id;
|
427 |
|
428 |
if (dev->reg != -1) { |
429 |
/*
|
430 |
* Explicitly assigned address, just verify that no-one else
|
431 |
* is using it. other mechanism). We have to open code this
|
432 |
* rather than using spapr_vio_find_by_reg() because sdev
|
433 |
* itself is already in the list.
|
434 |
*/
|
435 |
VIOsPAPRDevice *other = reg_conflict(dev); |
436 |
|
437 |
if (other) {
|
438 |
fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
|
439 |
object_get_typename(OBJECT(qdev)), |
440 |
object_get_typename(OBJECT(&other->qdev)), |
441 |
dev->reg); |
442 |
return -1; |
443 |
} |
444 |
} else {
|
445 |
/* Need to assign an address */
|
446 |
VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus); |
447 |
|
448 |
do {
|
449 |
dev->reg = bus->next_reg++; |
450 |
} while (reg_conflict(dev));
|
451 |
} |
452 |
|
453 |
/* Don't overwrite ids assigned on the command line */
|
454 |
if (!dev->qdev.id) {
|
455 |
id = vio_format_dev_name(dev); |
456 |
if (!id) {
|
457 |
return -1; |
458 |
} |
459 |
dev->qdev.id = id; |
460 |
} |
461 |
|
462 |
dev->irq = spapr_allocate_msi(dev->irq); |
463 |
if (!dev->irq) {
|
464 |
return -1; |
465 |
} |
466 |
|
467 |
liobn = SPAPR_VIO_BASE_LIOBN | dev->reg; |
468 |
dev->dma = spapr_tce_new_dma_context(liobn, pc->rtce_window_size); |
469 |
|
470 |
return pc->init(dev);
|
471 |
} |
472 |
|
473 |
static target_ulong h_vio_signal(CPUPPCState *env, sPAPREnvironment *spapr,
|
474 |
target_ulong opcode, |
475 |
target_ulong *args) |
476 |
{ |
477 |
target_ulong reg = args[0];
|
478 |
target_ulong mode = args[1];
|
479 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
480 |
VIOsPAPRDeviceClass *pc; |
481 |
|
482 |
if (!dev) {
|
483 |
return H_PARAMETER;
|
484 |
} |
485 |
|
486 |
pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
487 |
|
488 |
if (mode & ~pc->signal_mask) {
|
489 |
return H_PARAMETER;
|
490 |
} |
491 |
|
492 |
dev->signal_state = mode; |
493 |
|
494 |
return H_SUCCESS;
|
495 |
} |
496 |
|
497 |
VIOsPAPRBus *spapr_vio_bus_init(void)
|
498 |
{ |
499 |
VIOsPAPRBus *bus; |
500 |
BusState *qbus; |
501 |
DeviceState *dev; |
502 |
|
503 |
/* Create bridge device */
|
504 |
dev = qdev_create(NULL, "spapr-vio-bridge"); |
505 |
qdev_init_nofail(dev); |
506 |
|
507 |
/* Create bus on bridge device */
|
508 |
|
509 |
qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
|
510 |
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
511 |
bus->next_reg = 0x1000;
|
512 |
|
513 |
/* hcall-vio */
|
514 |
spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
515 |
|
516 |
/* hcall-crq */
|
517 |
spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
518 |
spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
519 |
spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
520 |
spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
521 |
|
522 |
/* RTAS calls */
|
523 |
spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
|
524 |
spapr_rtas_register("quiesce", rtas_quiesce);
|
525 |
|
526 |
return bus;
|
527 |
} |
528 |
|
529 |
/* Represents sPAPR hcall VIO devices */
|
530 |
|
531 |
static int spapr_vio_bridge_init(SysBusDevice *dev) |
532 |
{ |
533 |
/* nothing */
|
534 |
return 0; |
535 |
} |
536 |
|
537 |
static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data) |
538 |
{ |
539 |
DeviceClass *dc = DEVICE_CLASS(klass); |
540 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
541 |
|
542 |
k->init = spapr_vio_bridge_init; |
543 |
dc->no_user = 1;
|
544 |
} |
545 |
|
546 |
static TypeInfo spapr_vio_bridge_info = {
|
547 |
.name = "spapr-vio-bridge",
|
548 |
.parent = TYPE_SYS_BUS_DEVICE, |
549 |
.instance_size = sizeof(SysBusDevice),
|
550 |
.class_init = spapr_vio_bridge_class_init, |
551 |
}; |
552 |
|
553 |
static void vio_spapr_device_class_init(ObjectClass *klass, void *data) |
554 |
{ |
555 |
DeviceClass *k = DEVICE_CLASS(klass); |
556 |
k->init = spapr_vio_busdev_init; |
557 |
k->reset = spapr_vio_busdev_reset; |
558 |
k->bus_type = TYPE_SPAPR_VIO_BUS; |
559 |
k->props = spapr_vio_props; |
560 |
} |
561 |
|
562 |
static TypeInfo spapr_vio_type_info = {
|
563 |
.name = TYPE_VIO_SPAPR_DEVICE, |
564 |
.parent = TYPE_DEVICE, |
565 |
.instance_size = sizeof(VIOsPAPRDevice),
|
566 |
.abstract = true,
|
567 |
.class_size = sizeof(VIOsPAPRDeviceClass),
|
568 |
.class_init = vio_spapr_device_class_init, |
569 |
}; |
570 |
|
571 |
static void spapr_vio_register_types(void) |
572 |
{ |
573 |
type_register_static(&spapr_vio_bus_info); |
574 |
type_register_static(&spapr_vio_bridge_info); |
575 |
type_register_static(&spapr_vio_type_info); |
576 |
} |
577 |
|
578 |
type_init(spapr_vio_register_types) |
579 |
|
580 |
#ifdef CONFIG_FDT
|
581 |
static int compare_reg(const void *p1, const void *p2) |
582 |
{ |
583 |
VIOsPAPRDevice const *dev1, *dev2;
|
584 |
|
585 |
dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1; |
586 |
dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2; |
587 |
|
588 |
if (dev1->reg < dev2->reg) {
|
589 |
return -1; |
590 |
} |
591 |
if (dev1->reg == dev2->reg) {
|
592 |
return 0; |
593 |
} |
594 |
|
595 |
/* dev1->reg > dev2->reg */
|
596 |
return 1; |
597 |
} |
598 |
|
599 |
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
600 |
{ |
601 |
DeviceState *qdev, **qdevs; |
602 |
BusChild *kid; |
603 |
int i, num, ret = 0; |
604 |
|
605 |
/* Count qdevs on the bus list */
|
606 |
num = 0;
|
607 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
608 |
num++; |
609 |
} |
610 |
|
611 |
/* Copy out into an array of pointers */
|
612 |
qdevs = g_malloc(sizeof(qdev) * num);
|
613 |
num = 0;
|
614 |
QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
615 |
qdevs[num++] = kid->child; |
616 |
} |
617 |
|
618 |
/* Sort the array */
|
619 |
qsort(qdevs, num, sizeof(qdev), compare_reg);
|
620 |
|
621 |
/* Hack alert. Give the devices to libfdt in reverse order, we happen
|
622 |
* to know that will mean they are in forward order in the tree. */
|
623 |
for (i = num - 1; i >= 0; i--) { |
624 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]); |
625 |
|
626 |
ret = vio_make_devnode(dev, fdt); |
627 |
|
628 |
if (ret < 0) { |
629 |
goto out;
|
630 |
} |
631 |
} |
632 |
|
633 |
ret = 0;
|
634 |
out:
|
635 |
free(qdevs); |
636 |
|
637 |
return ret;
|
638 |
} |
639 |
|
640 |
int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus) |
641 |
{ |
642 |
VIOsPAPRDevice *dev; |
643 |
char *name, *path;
|
644 |
int ret, offset;
|
645 |
|
646 |
dev = spapr_vty_get_default(bus); |
647 |
if (!dev)
|
648 |
return 0; |
649 |
|
650 |
offset = fdt_path_offset(fdt, "/chosen");
|
651 |
if (offset < 0) { |
652 |
return offset;
|
653 |
} |
654 |
|
655 |
name = vio_format_dev_name(dev); |
656 |
if (!name) {
|
657 |
return -ENOMEM;
|
658 |
} |
659 |
|
660 |
if (asprintf(&path, "/vdevice/%s", name) < 0) { |
661 |
path = NULL;
|
662 |
ret = -ENOMEM; |
663 |
goto out;
|
664 |
} |
665 |
|
666 |
ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
|
667 |
out:
|
668 |
free(name); |
669 |
free(path); |
670 |
|
671 |
return ret;
|
672 |
} |
673 |
#endif /* CONFIG_FDT */ |