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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 | VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)dev->qdev.info; | |
79 | char *name; | |
80 | ||
81 | /* Device tree style name device@reg */ | |
82 | if (asprintf(&name, "%s@%x", info->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 | VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)dev->qdev.info; | |
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 (info->dt_type) { | |
119 | ret = fdt_setprop_string(fdt, node_off, "device_type", | |
120 | info->dt_type); | |
121 | if (ret < 0) { | |
122 | return ret; | |
123 | } | |
124 | } | |
125 | ||
126 | if (info->dt_compatible) { | |
127 | ret = fdt_setprop_string(fdt, node_off, "compatible", | |
128 | info->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 (info->devnode) { | |
167 | ret = (info->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(CPUState *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(CPUState *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(CPUState *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(CPUState *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(CPUState *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_busdev_init(DeviceState *qdev, DeviceInfo *qinfo) | |
625 | { | |
626 | VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; | |
627 | VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; | |
628 | char *id; | |
629 | ||
630 | /* Don't overwrite ids assigned on the command line */ | |
631 | if (!dev->qdev.id) { | |
632 | id = vio_format_dev_name(dev); | |
633 | if (!id) { | |
634 | return -1; | |
635 | } | |
636 | dev->qdev.id = id; | |
637 | } | |
638 | ||
639 | dev->qirq = spapr_allocate_irq(dev->vio_irq_num, &dev->vio_irq_num); | |
640 | if (!dev->qirq) { | |
641 | return -1; | |
642 | } | |
643 | ||
644 | rtce_init(dev); | |
645 | ||
646 | return info->init(dev); | |
647 | } | |
648 | ||
649 | void spapr_vio_bus_register_withprop(VIOsPAPRDeviceInfo *info) | |
650 | { | |
651 | info->qdev.init = spapr_vio_busdev_init; | |
652 | info->qdev.bus_info = &spapr_vio_bus_info; | |
653 | ||
654 | assert(info->qdev.size >= sizeof(VIOsPAPRDevice)); | |
655 | qdev_register(&info->qdev); | |
656 | } | |
657 | ||
658 | static target_ulong h_vio_signal(CPUState *env, sPAPREnvironment *spapr, | |
659 | target_ulong opcode, | |
660 | target_ulong *args) | |
661 | { | |
662 | target_ulong reg = args[0]; | |
663 | target_ulong mode = args[1]; | |
664 | VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); | |
665 | VIOsPAPRDeviceInfo *info; | |
666 | ||
667 | if (!dev) { | |
668 | return H_PARAMETER; | |
669 | } | |
670 | ||
671 | info = (VIOsPAPRDeviceInfo *)dev->qdev.info; | |
672 | ||
673 | if (mode & ~info->signal_mask) { | |
674 | return H_PARAMETER; | |
675 | } | |
676 | ||
677 | dev->signal_state = mode; | |
678 | ||
679 | return H_SUCCESS; | |
680 | } | |
681 | ||
682 | VIOsPAPRBus *spapr_vio_bus_init(void) | |
683 | { | |
684 | VIOsPAPRBus *bus; | |
685 | BusState *qbus; | |
686 | DeviceState *dev; | |
687 | ||
688 | /* Create bridge device */ | |
689 | dev = qdev_create(NULL, "spapr-vio-bridge"); | |
690 | qdev_init_nofail(dev); | |
691 | ||
692 | /* Create bus on bridge device */ | |
693 | ||
694 | qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio"); | |
695 | bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); | |
696 | ||
697 | /* hcall-vio */ | |
698 | spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); | |
699 | ||
700 | /* hcall-tce */ | |
701 | spapr_register_hypercall(H_PUT_TCE, h_put_tce); | |
702 | ||
703 | /* hcall-crq */ | |
704 | spapr_register_hypercall(H_REG_CRQ, h_reg_crq); | |
705 | spapr_register_hypercall(H_FREE_CRQ, h_free_crq); | |
706 | spapr_register_hypercall(H_SEND_CRQ, h_send_crq); | |
707 | spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); | |
708 | ||
709 | /* RTAS calls */ | |
710 | spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass); | |
711 | spapr_rtas_register("quiesce", rtas_quiesce); | |
712 | ||
713 | return bus; | |
714 | } | |
715 | ||
716 | /* Represents sPAPR hcall VIO devices */ | |
717 | ||
718 | static int spapr_vio_bridge_init(SysBusDevice *dev) | |
719 | { | |
720 | /* nothing */ | |
721 | return 0; | |
722 | } | |
723 | ||
724 | static SysBusDeviceInfo spapr_vio_bridge_info = { | |
725 | .init = spapr_vio_bridge_init, | |
726 | .qdev.name = "spapr-vio-bridge", | |
727 | .qdev.size = sizeof(SysBusDevice), | |
728 | .qdev.no_user = 1, | |
729 | }; | |
730 | ||
731 | static void spapr_vio_register_devices(void) | |
732 | { | |
733 | sysbus_register_withprop(&spapr_vio_bridge_info); | |
734 | } | |
735 | ||
736 | device_init(spapr_vio_register_devices) | |
737 | ||
738 | #ifdef CONFIG_FDT | |
739 | int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) | |
740 | { | |
741 | DeviceState *qdev; | |
742 | int ret = 0; | |
743 | ||
744 | QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) { | |
745 | VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; | |
746 | ||
747 | ret = vio_make_devnode(dev, fdt); | |
748 | ||
749 | if (ret < 0) { | |
750 | return ret; | |
751 | } | |
752 | } | |
753 | ||
754 | return 0; | |
755 | } | |
756 | #endif /* CONFIG_FDT */ |