root / hw / spapr_vio.c @ d07fee7e
History | View | Annotate | Download (22 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 |
/* #define DEBUG_TCE */
|
43 |
|
44 |
#ifdef DEBUG_SPAPR
|
45 |
#define dprintf(fmt, ...) \
|
46 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
47 |
#else
|
48 |
#define dprintf(fmt, ...) \
|
49 |
do { } while (0) |
50 |
#endif
|
51 |
|
52 |
static struct BusInfo spapr_vio_bus_info = { |
53 |
.name = "spapr-vio",
|
54 |
.size = sizeof(VIOsPAPRBus),
|
55 |
.props = (Property[]) { |
56 |
DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, vio_irq_num, 0), \ |
57 |
DEFINE_PROP_END_OF_LIST(), |
58 |
}, |
59 |
}; |
60 |
|
61 |
VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg) |
62 |
{ |
63 |
DeviceState *qdev; |
64 |
VIOsPAPRDevice *dev = NULL;
|
65 |
|
66 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
67 |
dev = (VIOsPAPRDevice *)qdev; |
68 |
if (dev->reg == reg) {
|
69 |
return dev;
|
70 |
} |
71 |
} |
72 |
|
73 |
return NULL; |
74 |
} |
75 |
|
76 |
static char *vio_format_dev_name(VIOsPAPRDevice *dev) |
77 |
{ |
78 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
79 |
char *name;
|
80 |
|
81 |
/* Device tree style name device@reg */
|
82 |
if (asprintf(&name, "%s@%x", pc->dt_name, dev->reg) < 0) { |
83 |
return NULL; |
84 |
} |
85 |
|
86 |
return name;
|
87 |
} |
88 |
|
89 |
#ifdef CONFIG_FDT
|
90 |
static int vio_make_devnode(VIOsPAPRDevice *dev, |
91 |
void *fdt)
|
92 |
{ |
93 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
94 |
int vdevice_off, node_off, ret;
|
95 |
char *dt_name;
|
96 |
|
97 |
vdevice_off = fdt_path_offset(fdt, "/vdevice");
|
98 |
if (vdevice_off < 0) { |
99 |
return vdevice_off;
|
100 |
} |
101 |
|
102 |
dt_name = vio_format_dev_name(dev); |
103 |
if (!dt_name) {
|
104 |
return -ENOMEM;
|
105 |
} |
106 |
|
107 |
node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); |
108 |
free(dt_name); |
109 |
if (node_off < 0) { |
110 |
return node_off;
|
111 |
} |
112 |
|
113 |
ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
|
114 |
if (ret < 0) { |
115 |
return ret;
|
116 |
} |
117 |
|
118 |
if (pc->dt_type) {
|
119 |
ret = fdt_setprop_string(fdt, node_off, "device_type",
|
120 |
pc->dt_type); |
121 |
if (ret < 0) { |
122 |
return ret;
|
123 |
} |
124 |
} |
125 |
|
126 |
if (pc->dt_compatible) {
|
127 |
ret = fdt_setprop_string(fdt, node_off, "compatible",
|
128 |
pc->dt_compatible); |
129 |
if (ret < 0) { |
130 |
return ret;
|
131 |
} |
132 |
} |
133 |
|
134 |
if (dev->qirq) {
|
135 |
uint32_t ints_prop[] = {cpu_to_be32(dev->vio_irq_num), 0};
|
136 |
|
137 |
ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
|
138 |
sizeof(ints_prop));
|
139 |
if (ret < 0) { |
140 |
return ret;
|
141 |
} |
142 |
} |
143 |
|
144 |
if (dev->rtce_window_size) {
|
145 |
uint32_t dma_prop[] = {cpu_to_be32(dev->reg), |
146 |
0, 0, |
147 |
0, cpu_to_be32(dev->rtce_window_size)};
|
148 |
|
149 |
ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); |
150 |
if (ret < 0) { |
151 |
return ret;
|
152 |
} |
153 |
|
154 |
ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); |
155 |
if (ret < 0) { |
156 |
return ret;
|
157 |
} |
158 |
|
159 |
ret = fdt_setprop(fdt, node_off, "ibm,my-dma-window", dma_prop,
|
160 |
sizeof(dma_prop));
|
161 |
if (ret < 0) { |
162 |
return ret;
|
163 |
} |
164 |
} |
165 |
|
166 |
if (pc->devnode) {
|
167 |
ret = (pc->devnode)(dev, fdt, node_off); |
168 |
if (ret < 0) { |
169 |
return ret;
|
170 |
} |
171 |
} |
172 |
|
173 |
return node_off;
|
174 |
} |
175 |
#endif /* CONFIG_FDT */ |
176 |
|
177 |
/*
|
178 |
* RTCE handling
|
179 |
*/
|
180 |
|
181 |
static void rtce_init(VIOsPAPRDevice *dev) |
182 |
{ |
183 |
size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
184 |
* sizeof(VIOsPAPR_RTCE);
|
185 |
|
186 |
if (size) {
|
187 |
dev->rtce_table = kvmppc_create_spapr_tce(dev->reg, |
188 |
dev->rtce_window_size, |
189 |
&dev->kvmtce_fd); |
190 |
|
191 |
if (!dev->rtce_table) {
|
192 |
dev->rtce_table = g_malloc0(size); |
193 |
} |
194 |
} |
195 |
} |
196 |
|
197 |
static target_ulong h_put_tce(CPUPPCState *env, sPAPREnvironment *spapr,
|
198 |
target_ulong opcode, target_ulong *args) |
199 |
{ |
200 |
target_ulong liobn = args[0];
|
201 |
target_ulong ioba = args[1];
|
202 |
target_ulong tce = args[2];
|
203 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, liobn); |
204 |
VIOsPAPR_RTCE *rtce; |
205 |
|
206 |
if (!dev) {
|
207 |
hcall_dprintf("spapr_vio_put_tce on non-existent LIOBN "
|
208 |
TARGET_FMT_lx "\n", liobn);
|
209 |
return H_PARAMETER;
|
210 |
} |
211 |
|
212 |
ioba &= ~(SPAPR_VIO_TCE_PAGE_SIZE - 1);
|
213 |
|
214 |
#ifdef DEBUG_TCE
|
215 |
fprintf(stderr, "spapr_vio_put_tce on %s ioba 0x" TARGET_FMT_lx
|
216 |
" TCE 0x" TARGET_FMT_lx "\n", dev->qdev.id, ioba, tce); |
217 |
#endif
|
218 |
|
219 |
if (ioba >= dev->rtce_window_size) {
|
220 |
hcall_dprintf("spapr_vio_put_tce on out-of-boards IOBA 0x"
|
221 |
TARGET_FMT_lx "\n", ioba);
|
222 |
return H_PARAMETER;
|
223 |
} |
224 |
|
225 |
rtce = dev->rtce_table + (ioba >> SPAPR_VIO_TCE_PAGE_SHIFT); |
226 |
rtce->tce = tce; |
227 |
|
228 |
return H_SUCCESS;
|
229 |
} |
230 |
|
231 |
int spapr_vio_check_tces(VIOsPAPRDevice *dev, target_ulong ioba,
|
232 |
target_ulong len, enum VIOsPAPR_TCEAccess access)
|
233 |
{ |
234 |
int start, end, i;
|
235 |
|
236 |
start = ioba >> SPAPR_VIO_TCE_PAGE_SHIFT; |
237 |
end = (ioba + len - 1) >> SPAPR_VIO_TCE_PAGE_SHIFT;
|
238 |
|
239 |
for (i = start; i <= end; i++) {
|
240 |
if ((dev->rtce_table[i].tce & access) != access) {
|
241 |
#ifdef DEBUG_TCE
|
242 |
fprintf(stderr, "FAIL on %d\n", i);
|
243 |
#endif
|
244 |
return -1; |
245 |
} |
246 |
} |
247 |
|
248 |
return 0; |
249 |
} |
250 |
|
251 |
int spapr_tce_dma_write(VIOsPAPRDevice *dev, uint64_t taddr, const void *buf, |
252 |
uint32_t size) |
253 |
{ |
254 |
#ifdef DEBUG_TCE
|
255 |
fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
|
256 |
(unsigned long long)taddr, size); |
257 |
#endif
|
258 |
|
259 |
/* Check for bypass */
|
260 |
if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
|
261 |
cpu_physical_memory_write(taddr, buf, size); |
262 |
return 0; |
263 |
} |
264 |
|
265 |
while (size) {
|
266 |
uint64_t tce; |
267 |
uint32_t lsize; |
268 |
uint64_t txaddr; |
269 |
|
270 |
/* Check if we are in bound */
|
271 |
if (taddr >= dev->rtce_window_size) {
|
272 |
#ifdef DEBUG_TCE
|
273 |
fprintf(stderr, "spapr_tce_dma_write out of bounds\n");
|
274 |
#endif
|
275 |
return H_DEST_PARM;
|
276 |
} |
277 |
tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
278 |
|
279 |
/* How much til end of page ? */
|
280 |
lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
|
281 |
|
282 |
/* Check TCE */
|
283 |
if (!(tce & 2)) { |
284 |
return H_DEST_PARM;
|
285 |
} |
286 |
|
287 |
/* Translate */
|
288 |
txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
289 |
(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
290 |
|
291 |
#ifdef DEBUG_TCE
|
292 |
fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
|
293 |
(unsigned long long)txaddr, lsize); |
294 |
#endif
|
295 |
|
296 |
/* Do it */
|
297 |
cpu_physical_memory_write(txaddr, buf, lsize); |
298 |
buf += lsize; |
299 |
taddr += lsize; |
300 |
size -= lsize; |
301 |
} |
302 |
return 0; |
303 |
} |
304 |
|
305 |
int spapr_tce_dma_zero(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t size)
|
306 |
{ |
307 |
/* FIXME: allocating a temp buffer is nasty, but just stepping
|
308 |
* through writing zeroes is awkward. This will do for now. */
|
309 |
uint8_t zeroes[size]; |
310 |
|
311 |
#ifdef DEBUG_TCE
|
312 |
fprintf(stderr, "spapr_tce_dma_zero taddr=0x%llx size=0x%x\n",
|
313 |
(unsigned long long)taddr, size); |
314 |
#endif
|
315 |
|
316 |
memset(zeroes, 0, size);
|
317 |
return spapr_tce_dma_write(dev, taddr, zeroes, size);
|
318 |
} |
319 |
|
320 |
void stb_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint8_t val)
|
321 |
{ |
322 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
323 |
} |
324 |
|
325 |
void sth_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint16_t val)
|
326 |
{ |
327 |
val = tswap16(val); |
328 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
329 |
} |
330 |
|
331 |
|
332 |
void stw_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t val)
|
333 |
{ |
334 |
val = tswap32(val); |
335 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
336 |
} |
337 |
|
338 |
void stq_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint64_t val)
|
339 |
{ |
340 |
val = tswap64(val); |
341 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
342 |
} |
343 |
|
344 |
int spapr_tce_dma_read(VIOsPAPRDevice *dev, uint64_t taddr, void *buf, |
345 |
uint32_t size) |
346 |
{ |
347 |
#ifdef DEBUG_TCE
|
348 |
fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
|
349 |
(unsigned long long)taddr, size); |
350 |
#endif
|
351 |
|
352 |
/* Check for bypass */
|
353 |
if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
|
354 |
cpu_physical_memory_read(taddr, buf, size); |
355 |
return 0; |
356 |
} |
357 |
|
358 |
while (size) {
|
359 |
uint64_t tce; |
360 |
uint32_t lsize; |
361 |
uint64_t txaddr; |
362 |
|
363 |
/* Check if we are in bound */
|
364 |
if (taddr >= dev->rtce_window_size) {
|
365 |
#ifdef DEBUG_TCE
|
366 |
fprintf(stderr, "spapr_tce_dma_read out of bounds\n");
|
367 |
#endif
|
368 |
return H_DEST_PARM;
|
369 |
} |
370 |
tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
371 |
|
372 |
/* How much til end of page ? */
|
373 |
lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
|
374 |
|
375 |
/* Check TCE */
|
376 |
if (!(tce & 1)) { |
377 |
return H_DEST_PARM;
|
378 |
} |
379 |
|
380 |
/* Translate */
|
381 |
txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
382 |
(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
383 |
|
384 |
#ifdef DEBUG_TCE
|
385 |
fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
|
386 |
(unsigned long long)txaddr, lsize); |
387 |
#endif
|
388 |
/* Do it */
|
389 |
cpu_physical_memory_read(txaddr, buf, lsize); |
390 |
buf += lsize; |
391 |
taddr += lsize; |
392 |
size -= lsize; |
393 |
} |
394 |
return H_SUCCESS;
|
395 |
} |
396 |
|
397 |
uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr) |
398 |
{ |
399 |
uint64_t val; |
400 |
|
401 |
spapr_tce_dma_read(dev, taddr, &val, sizeof(val));
|
402 |
return tswap64(val);
|
403 |
} |
404 |
|
405 |
/*
|
406 |
* CRQ handling
|
407 |
*/
|
408 |
static target_ulong h_reg_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
409 |
target_ulong opcode, target_ulong *args) |
410 |
{ |
411 |
target_ulong reg = args[0];
|
412 |
target_ulong queue_addr = args[1];
|
413 |
target_ulong queue_len = args[2];
|
414 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
415 |
|
416 |
if (!dev) {
|
417 |
hcall_dprintf("h_reg_crq on non-existent unit 0x"
|
418 |
TARGET_FMT_lx "\n", reg);
|
419 |
return H_PARAMETER;
|
420 |
} |
421 |
|
422 |
/* We can't grok a queue size bigger than 256M for now */
|
423 |
if (queue_len < 0x1000 || queue_len > 0x10000000) { |
424 |
hcall_dprintf("h_reg_crq, queue size too small or too big (0x%llx)\n",
|
425 |
(unsigned long long)queue_len); |
426 |
return H_PARAMETER;
|
427 |
} |
428 |
|
429 |
/* Check queue alignment */
|
430 |
if (queue_addr & 0xfff) { |
431 |
hcall_dprintf("h_reg_crq, queue not aligned (0x%llx)\n",
|
432 |
(unsigned long long)queue_addr); |
433 |
return H_PARAMETER;
|
434 |
} |
435 |
|
436 |
/* Check if device supports CRQs */
|
437 |
if (!dev->crq.SendFunc) {
|
438 |
return H_NOT_FOUND;
|
439 |
} |
440 |
|
441 |
|
442 |
/* Already a queue ? */
|
443 |
if (dev->crq.qsize) {
|
444 |
return H_RESOURCE;
|
445 |
} |
446 |
dev->crq.qladdr = queue_addr; |
447 |
dev->crq.qsize = queue_len; |
448 |
dev->crq.qnext = 0;
|
449 |
|
450 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
451 |
TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
452 |
reg, queue_addr, queue_len); |
453 |
return H_SUCCESS;
|
454 |
} |
455 |
|
456 |
static target_ulong h_free_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
457 |
target_ulong opcode, target_ulong *args) |
458 |
{ |
459 |
target_ulong reg = args[0];
|
460 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
461 |
|
462 |
if (!dev) {
|
463 |
hcall_dprintf("h_free_crq on non-existent unit 0x"
|
464 |
TARGET_FMT_lx "\n", reg);
|
465 |
return H_PARAMETER;
|
466 |
} |
467 |
|
468 |
dev->crq.qladdr = 0;
|
469 |
dev->crq.qsize = 0;
|
470 |
dev->crq.qnext = 0;
|
471 |
|
472 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " freed\n", reg); |
473 |
|
474 |
return H_SUCCESS;
|
475 |
} |
476 |
|
477 |
static target_ulong h_send_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
478 |
target_ulong opcode, target_ulong *args) |
479 |
{ |
480 |
target_ulong reg = args[0];
|
481 |
target_ulong msg_hi = args[1];
|
482 |
target_ulong msg_lo = args[2];
|
483 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
484 |
uint64_t crq_mangle[2];
|
485 |
|
486 |
if (!dev) {
|
487 |
hcall_dprintf("h_send_crq on non-existent unit 0x"
|
488 |
TARGET_FMT_lx "\n", reg);
|
489 |
return H_PARAMETER;
|
490 |
} |
491 |
crq_mangle[0] = cpu_to_be64(msg_hi);
|
492 |
crq_mangle[1] = cpu_to_be64(msg_lo);
|
493 |
|
494 |
if (dev->crq.SendFunc) {
|
495 |
return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
|
496 |
} |
497 |
|
498 |
return H_HARDWARE;
|
499 |
} |
500 |
|
501 |
static target_ulong h_enable_crq(CPUPPCState *env, sPAPREnvironment *spapr,
|
502 |
target_ulong opcode, target_ulong *args) |
503 |
{ |
504 |
target_ulong reg = args[0];
|
505 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
506 |
|
507 |
if (!dev) {
|
508 |
hcall_dprintf("h_enable_crq on non-existent unit 0x"
|
509 |
TARGET_FMT_lx "\n", reg);
|
510 |
return H_PARAMETER;
|
511 |
} |
512 |
|
513 |
return 0; |
514 |
} |
515 |
|
516 |
/* Returns negative error, 0 success, or positive: queue full */
|
517 |
int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
|
518 |
{ |
519 |
int rc;
|
520 |
uint8_t byte; |
521 |
|
522 |
if (!dev->crq.qsize) {
|
523 |
fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
|
524 |
return -1; |
525 |
} |
526 |
|
527 |
/* Maybe do a fast path for KVM just writing to the pages */
|
528 |
rc = spapr_tce_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
|
529 |
if (rc) {
|
530 |
return rc;
|
531 |
} |
532 |
if (byte != 0) { |
533 |
return 1; |
534 |
} |
535 |
|
536 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
|
537 |
&crq[8], 8); |
538 |
if (rc) {
|
539 |
return rc;
|
540 |
} |
541 |
|
542 |
kvmppc_eieio(); |
543 |
|
544 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
|
545 |
if (rc) {
|
546 |
return rc;
|
547 |
} |
548 |
|
549 |
dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
|
550 |
|
551 |
if (dev->signal_state & 1) { |
552 |
qemu_irq_pulse(dev->qirq); |
553 |
} |
554 |
|
555 |
return 0; |
556 |
} |
557 |
|
558 |
/* "quiesce" handling */
|
559 |
|
560 |
static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
561 |
{ |
562 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
563 |
|
564 |
if (dev->rtce_table) {
|
565 |
size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
566 |
* sizeof(VIOsPAPR_RTCE);
|
567 |
memset(dev->rtce_table, 0, size);
|
568 |
} |
569 |
|
570 |
dev->crq.qladdr = 0;
|
571 |
dev->crq.qsize = 0;
|
572 |
dev->crq.qnext = 0;
|
573 |
} |
574 |
|
575 |
static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
576 |
uint32_t nargs, target_ulong args, |
577 |
uint32_t nret, target_ulong rets) |
578 |
{ |
579 |
VIOsPAPRBus *bus = spapr->vio_bus; |
580 |
VIOsPAPRDevice *dev; |
581 |
uint32_t unit, enable; |
582 |
|
583 |
if (nargs != 2) { |
584 |
rtas_st(rets, 0, -3); |
585 |
return;
|
586 |
} |
587 |
unit = rtas_ld(args, 0);
|
588 |
enable = rtas_ld(args, 1);
|
589 |
dev = spapr_vio_find_by_reg(bus, unit); |
590 |
if (!dev) {
|
591 |
rtas_st(rets, 0, -3); |
592 |
return;
|
593 |
} |
594 |
if (enable) {
|
595 |
dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS; |
596 |
} else {
|
597 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
598 |
} |
599 |
|
600 |
rtas_st(rets, 0, 0); |
601 |
} |
602 |
|
603 |
static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
604 |
uint32_t nargs, target_ulong args, |
605 |
uint32_t nret, target_ulong rets) |
606 |
{ |
607 |
VIOsPAPRBus *bus = spapr->vio_bus; |
608 |
DeviceState *qdev; |
609 |
VIOsPAPRDevice *dev = NULL;
|
610 |
|
611 |
if (nargs != 0) { |
612 |
rtas_st(rets, 0, -3); |
613 |
return;
|
614 |
} |
615 |
|
616 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
617 |
dev = (VIOsPAPRDevice *)qdev; |
618 |
spapr_vio_quiesce_one(dev); |
619 |
} |
620 |
|
621 |
rtas_st(rets, 0, 0); |
622 |
} |
623 |
|
624 |
static int spapr_vio_check_reg(VIOsPAPRDevice *sdev) |
625 |
{ |
626 |
VIOsPAPRDevice *other_sdev; |
627 |
DeviceState *qdev; |
628 |
VIOsPAPRBus *sbus; |
629 |
|
630 |
sbus = DO_UPCAST(VIOsPAPRBus, bus, sdev->qdev.parent_bus); |
631 |
|
632 |
/*
|
633 |
* Check two device aren't given clashing addresses by the user (or some
|
634 |
* other mechanism). We have to open code this because we have to check
|
635 |
* for matches with devices other than us.
|
636 |
*/
|
637 |
QTAILQ_FOREACH(qdev, &sbus->bus.children, sibling) { |
638 |
other_sdev = DO_UPCAST(VIOsPAPRDevice, qdev, qdev); |
639 |
|
640 |
if (other_sdev != sdev && other_sdev->reg == sdev->reg) {
|
641 |
fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
|
642 |
object_get_typename(OBJECT(sdev)), |
643 |
object_get_typename(OBJECT(qdev)), |
644 |
sdev->reg); |
645 |
return -EEXIST;
|
646 |
} |
647 |
} |
648 |
|
649 |
return 0; |
650 |
} |
651 |
|
652 |
static int spapr_vio_busdev_init(DeviceState *qdev) |
653 |
{ |
654 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
655 |
VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
656 |
char *id;
|
657 |
int ret;
|
658 |
|
659 |
ret = spapr_vio_check_reg(dev); |
660 |
if (ret) {
|
661 |
return ret;
|
662 |
} |
663 |
|
664 |
/* Don't overwrite ids assigned on the command line */
|
665 |
if (!dev->qdev.id) {
|
666 |
id = vio_format_dev_name(dev); |
667 |
if (!id) {
|
668 |
return -1; |
669 |
} |
670 |
dev->qdev.id = id; |
671 |
} |
672 |
|
673 |
dev->qirq = spapr_allocate_msi(dev->vio_irq_num, &dev->vio_irq_num); |
674 |
if (!dev->qirq) {
|
675 |
return -1; |
676 |
} |
677 |
|
678 |
rtce_init(dev); |
679 |
|
680 |
return pc->init(dev);
|
681 |
} |
682 |
|
683 |
static target_ulong h_vio_signal(CPUPPCState *env, sPAPREnvironment *spapr,
|
684 |
target_ulong opcode, |
685 |
target_ulong *args) |
686 |
{ |
687 |
target_ulong reg = args[0];
|
688 |
target_ulong mode = args[1];
|
689 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
690 |
VIOsPAPRDeviceClass *pc; |
691 |
|
692 |
if (!dev) {
|
693 |
return H_PARAMETER;
|
694 |
} |
695 |
|
696 |
pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
697 |
|
698 |
if (mode & ~pc->signal_mask) {
|
699 |
return H_PARAMETER;
|
700 |
} |
701 |
|
702 |
dev->signal_state = mode; |
703 |
|
704 |
return H_SUCCESS;
|
705 |
} |
706 |
|
707 |
VIOsPAPRBus *spapr_vio_bus_init(void)
|
708 |
{ |
709 |
VIOsPAPRBus *bus; |
710 |
BusState *qbus; |
711 |
DeviceState *dev; |
712 |
|
713 |
/* Create bridge device */
|
714 |
dev = qdev_create(NULL, "spapr-vio-bridge"); |
715 |
qdev_init_nofail(dev); |
716 |
|
717 |
/* Create bus on bridge device */
|
718 |
|
719 |
qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio");
|
720 |
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
721 |
|
722 |
/* hcall-vio */
|
723 |
spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
724 |
|
725 |
/* hcall-tce */
|
726 |
spapr_register_hypercall(H_PUT_TCE, h_put_tce); |
727 |
|
728 |
/* hcall-crq */
|
729 |
spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
730 |
spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
731 |
spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
732 |
spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
733 |
|
734 |
/* RTAS calls */
|
735 |
spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
|
736 |
spapr_rtas_register("quiesce", rtas_quiesce);
|
737 |
|
738 |
return bus;
|
739 |
} |
740 |
|
741 |
/* Represents sPAPR hcall VIO devices */
|
742 |
|
743 |
static int spapr_vio_bridge_init(SysBusDevice *dev) |
744 |
{ |
745 |
/* nothing */
|
746 |
return 0; |
747 |
} |
748 |
|
749 |
static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data) |
750 |
{ |
751 |
DeviceClass *dc = DEVICE_CLASS(klass); |
752 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
753 |
|
754 |
k->init = spapr_vio_bridge_init; |
755 |
dc->no_user = 1;
|
756 |
} |
757 |
|
758 |
static TypeInfo spapr_vio_bridge_info = {
|
759 |
.name = "spapr-vio-bridge",
|
760 |
.parent = TYPE_SYS_BUS_DEVICE, |
761 |
.instance_size = sizeof(SysBusDevice),
|
762 |
.class_init = spapr_vio_bridge_class_init, |
763 |
}; |
764 |
|
765 |
static void vio_spapr_device_class_init(ObjectClass *klass, void *data) |
766 |
{ |
767 |
DeviceClass *k = DEVICE_CLASS(klass); |
768 |
k->init = spapr_vio_busdev_init; |
769 |
k->bus_info = &spapr_vio_bus_info; |
770 |
} |
771 |
|
772 |
static TypeInfo spapr_vio_type_info = {
|
773 |
.name = TYPE_VIO_SPAPR_DEVICE, |
774 |
.parent = TYPE_DEVICE, |
775 |
.instance_size = sizeof(VIOsPAPRDevice),
|
776 |
.abstract = true,
|
777 |
.class_size = sizeof(VIOsPAPRDeviceClass),
|
778 |
.class_init = vio_spapr_device_class_init, |
779 |
}; |
780 |
|
781 |
static void spapr_vio_register_types(void) |
782 |
{ |
783 |
type_register_static(&spapr_vio_bridge_info); |
784 |
type_register_static(&spapr_vio_type_info); |
785 |
} |
786 |
|
787 |
type_init(spapr_vio_register_types) |
788 |
|
789 |
#ifdef CONFIG_FDT
|
790 |
static int compare_reg(const void *p1, const void *p2) |
791 |
{ |
792 |
VIOsPAPRDevice const *dev1, *dev2;
|
793 |
|
794 |
dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1; |
795 |
dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2; |
796 |
|
797 |
if (dev1->reg < dev2->reg) {
|
798 |
return -1; |
799 |
} |
800 |
if (dev1->reg == dev2->reg) {
|
801 |
return 0; |
802 |
} |
803 |
|
804 |
/* dev1->reg > dev2->reg */
|
805 |
return 1; |
806 |
} |
807 |
|
808 |
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
809 |
{ |
810 |
DeviceState *qdev, **qdevs; |
811 |
int i, num, ret = 0; |
812 |
|
813 |
/* Count qdevs on the bus list */
|
814 |
num = 0;
|
815 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
816 |
num++; |
817 |
} |
818 |
|
819 |
/* Copy out into an array of pointers */
|
820 |
qdevs = g_malloc(sizeof(qdev) * num);
|
821 |
num = 0;
|
822 |
QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { |
823 |
qdevs[num++] = qdev; |
824 |
} |
825 |
|
826 |
/* Sort the array */
|
827 |
qsort(qdevs, num, sizeof(qdev), compare_reg);
|
828 |
|
829 |
/* Hack alert. Give the devices to libfdt in reverse order, we happen
|
830 |
* to know that will mean they are in forward order in the tree. */
|
831 |
for (i = num - 1; i >= 0; i--) { |
832 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]); |
833 |
|
834 |
ret = vio_make_devnode(dev, fdt); |
835 |
|
836 |
if (ret < 0) { |
837 |
goto out;
|
838 |
} |
839 |
} |
840 |
|
841 |
ret = 0;
|
842 |
out:
|
843 |
free(qdevs); |
844 |
|
845 |
return ret;
|
846 |
} |
847 |
|
848 |
int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus) |
849 |
{ |
850 |
VIOsPAPRDevice *dev; |
851 |
char *name, *path;
|
852 |
int ret, offset;
|
853 |
|
854 |
dev = spapr_vty_get_default(bus); |
855 |
if (!dev)
|
856 |
return 0; |
857 |
|
858 |
offset = fdt_path_offset(fdt, "/chosen");
|
859 |
if (offset < 0) { |
860 |
return offset;
|
861 |
} |
862 |
|
863 |
name = vio_format_dev_name(dev); |
864 |
if (!name) {
|
865 |
return -ENOMEM;
|
866 |
} |
867 |
|
868 |
if (asprintf(&path, "/vdevice/%s", name) < 0) { |
869 |
path = NULL;
|
870 |
ret = -ENOMEM; |
871 |
goto out;
|
872 |
} |
873 |
|
874 |
ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
|
875 |
out:
|
876 |
free(name); |
877 |
free(path); |
878 |
|
879 |
return ret;
|
880 |
} |
881 |
#endif /* CONFIG_FDT */ |