root / hw / spapr_vio.c @ 0200db65
History | View | Annotate | Download (18.5 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 |
QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
|
| 67 |
dev = (VIOsPAPRDevice *)qdev; |
| 68 |
if (dev->reg == reg) {
|
| 69 |
break;
|
| 70 |
} |
| 71 |
} |
| 72 |
|
| 73 |
return dev;
|
| 74 |
} |
| 75 |
|
| 76 |
#ifdef CONFIG_FDT
|
| 77 |
static int vio_make_devnode(VIOsPAPRDevice *dev, |
| 78 |
void *fdt)
|
| 79 |
{
|
| 80 |
VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)dev->qdev.info; |
| 81 |
int vdevice_off, node_off;
|
| 82 |
int ret;
|
| 83 |
|
| 84 |
vdevice_off = fdt_path_offset(fdt, "/vdevice");
|
| 85 |
if (vdevice_off < 0) { |
| 86 |
return vdevice_off;
|
| 87 |
} |
| 88 |
|
| 89 |
node_off = fdt_add_subnode(fdt, vdevice_off, dev->qdev.id); |
| 90 |
if (node_off < 0) { |
| 91 |
return node_off;
|
| 92 |
} |
| 93 |
|
| 94 |
ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
|
| 95 |
if (ret < 0) { |
| 96 |
return ret;
|
| 97 |
} |
| 98 |
|
| 99 |
if (info->dt_type) {
|
| 100 |
ret = fdt_setprop_string(fdt, node_off, "device_type",
|
| 101 |
info->dt_type); |
| 102 |
if (ret < 0) { |
| 103 |
return ret;
|
| 104 |
} |
| 105 |
} |
| 106 |
|
| 107 |
if (info->dt_compatible) {
|
| 108 |
ret = fdt_setprop_string(fdt, node_off, "compatible",
|
| 109 |
info->dt_compatible); |
| 110 |
if (ret < 0) { |
| 111 |
return ret;
|
| 112 |
} |
| 113 |
} |
| 114 |
|
| 115 |
if (dev->qirq) {
|
| 116 |
uint32_t ints_prop[] = {cpu_to_be32(dev->vio_irq_num), 0};
|
| 117 |
|
| 118 |
ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
|
| 119 |
sizeof(ints_prop));
|
| 120 |
if (ret < 0) { |
| 121 |
return ret;
|
| 122 |
} |
| 123 |
} |
| 124 |
|
| 125 |
if (dev->rtce_window_size) {
|
| 126 |
uint32_t dma_prop[] = {cpu_to_be32(dev->reg),
|
| 127 |
0, 0, |
| 128 |
0, cpu_to_be32(dev->rtce_window_size)};
|
| 129 |
|
| 130 |
ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); |
| 131 |
if (ret < 0) { |
| 132 |
return ret;
|
| 133 |
} |
| 134 |
|
| 135 |
ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); |
| 136 |
if (ret < 0) { |
| 137 |
return ret;
|
| 138 |
} |
| 139 |
|
| 140 |
ret = fdt_setprop(fdt, node_off, "ibm,my-dma-window", dma_prop,
|
| 141 |
sizeof(dma_prop));
|
| 142 |
if (ret < 0) { |
| 143 |
return ret;
|
| 144 |
} |
| 145 |
} |
| 146 |
|
| 147 |
if (info->devnode) {
|
| 148 |
ret = (info->devnode)(dev, fdt, node_off); |
| 149 |
if (ret < 0) { |
| 150 |
return ret;
|
| 151 |
} |
| 152 |
} |
| 153 |
|
| 154 |
return node_off;
|
| 155 |
} |
| 156 |
#endif /* CONFIG_FDT */ |
| 157 |
|
| 158 |
/*
|
| 159 |
* RTCE handling
|
| 160 |
*/
|
| 161 |
|
| 162 |
static void rtce_init(VIOsPAPRDevice *dev) |
| 163 |
{
|
| 164 |
size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
| 165 |
* sizeof(VIOsPAPR_RTCE);
|
| 166 |
|
| 167 |
if (size) {
|
| 168 |
dev->rtce_table = g_malloc0(size); |
| 169 |
} |
| 170 |
} |
| 171 |
|
| 172 |
static target_ulong h_put_tce(CPUState *env, sPAPREnvironment *spapr,
|
| 173 |
target_ulong opcode, target_ulong *args) |
| 174 |
{
|
| 175 |
target_ulong liobn = args[0];
|
| 176 |
target_ulong ioba = args[1];
|
| 177 |
target_ulong tce = args[2];
|
| 178 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, liobn); |
| 179 |
VIOsPAPR_RTCE *rtce; |
| 180 |
|
| 181 |
if (!dev) {
|
| 182 |
hcall_dprintf("spapr_vio_put_tce on non-existent LIOBN "
|
| 183 |
TARGET_FMT_lx "\n", liobn);
|
| 184 |
return H_PARAMETER;
|
| 185 |
} |
| 186 |
|
| 187 |
ioba &= ~(SPAPR_VIO_TCE_PAGE_SIZE - 1);
|
| 188 |
|
| 189 |
#ifdef DEBUG_TCE
|
| 190 |
fprintf(stderr, "spapr_vio_put_tce on %s ioba 0x" TARGET_FMT_lx
|
| 191 |
" TCE 0x" TARGET_FMT_lx "\n", dev->qdev.id, ioba, tce); |
| 192 |
#endif
|
| 193 |
|
| 194 |
if (ioba >= dev->rtce_window_size) {
|
| 195 |
hcall_dprintf("spapr_vio_put_tce on out-of-boards IOBA 0x"
|
| 196 |
TARGET_FMT_lx "\n", ioba);
|
| 197 |
return H_PARAMETER;
|
| 198 |
} |
| 199 |
|
| 200 |
rtce = dev->rtce_table + (ioba >> SPAPR_VIO_TCE_PAGE_SHIFT); |
| 201 |
rtce->tce = tce; |
| 202 |
|
| 203 |
return H_SUCCESS;
|
| 204 |
} |
| 205 |
|
| 206 |
int spapr_vio_check_tces(VIOsPAPRDevice *dev, target_ulong ioba,
|
| 207 |
target_ulong len, enum VIOsPAPR_TCEAccess access)
|
| 208 |
{
|
| 209 |
int start, end, i;
|
| 210 |
|
| 211 |
start = ioba >> SPAPR_VIO_TCE_PAGE_SHIFT; |
| 212 |
end = (ioba + len - 1) >> SPAPR_VIO_TCE_PAGE_SHIFT;
|
| 213 |
|
| 214 |
for (i = start; i <= end; i++) {
|
| 215 |
if ((dev->rtce_table[i].tce & access) != access) {
|
| 216 |
#ifdef DEBUG_TCE
|
| 217 |
fprintf(stderr, "FAIL on %d\n", i);
|
| 218 |
#endif
|
| 219 |
return -1; |
| 220 |
} |
| 221 |
} |
| 222 |
|
| 223 |
return 0; |
| 224 |
} |
| 225 |
|
| 226 |
int spapr_tce_dma_write(VIOsPAPRDevice *dev, uint64_t taddr, const void *buf, |
| 227 |
uint32_t size) |
| 228 |
{
|
| 229 |
#ifdef DEBUG_TCE
|
| 230 |
fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
|
| 231 |
(unsigned long long)taddr, size); |
| 232 |
#endif
|
| 233 |
|
| 234 |
/* Check for bypass */
|
| 235 |
if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
|
| 236 |
cpu_physical_memory_write(taddr, buf, size); |
| 237 |
return 0; |
| 238 |
} |
| 239 |
|
| 240 |
while (size) {
|
| 241 |
uint64_t tce; |
| 242 |
uint32_t lsize; |
| 243 |
uint64_t txaddr; |
| 244 |
|
| 245 |
/* Check if we are in bound */
|
| 246 |
if (taddr >= dev->rtce_window_size) {
|
| 247 |
#ifdef DEBUG_TCE
|
| 248 |
fprintf(stderr, "spapr_tce_dma_write out of bounds\n");
|
| 249 |
#endif
|
| 250 |
return H_DEST_PARM;
|
| 251 |
} |
| 252 |
tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
| 253 |
|
| 254 |
/* How much til end of page ? */
|
| 255 |
lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
|
| 256 |
|
| 257 |
/* Check TCE */
|
| 258 |
if (!(tce & 2)) { |
| 259 |
return H_DEST_PARM;
|
| 260 |
} |
| 261 |
|
| 262 |
/* Translate */
|
| 263 |
txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
| 264 |
(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
| 265 |
|
| 266 |
#ifdef DEBUG_TCE
|
| 267 |
fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
|
| 268 |
(unsigned long long)txaddr, lsize); |
| 269 |
#endif
|
| 270 |
|
| 271 |
/* Do it */
|
| 272 |
cpu_physical_memory_write(txaddr, buf, lsize); |
| 273 |
buf += lsize; |
| 274 |
taddr += lsize; |
| 275 |
size -= lsize; |
| 276 |
} |
| 277 |
return 0; |
| 278 |
} |
| 279 |
|
| 280 |
int spapr_tce_dma_zero(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t size)
|
| 281 |
{
|
| 282 |
/* FIXME: allocating a temp buffer is nasty, but just stepping
|
| 283 |
* through writing zeroes is awkward. This will do for now. */
|
| 284 |
uint8_t zeroes[size]; |
| 285 |
|
| 286 |
#ifdef DEBUG_TCE
|
| 287 |
fprintf(stderr, "spapr_tce_dma_zero taddr=0x%llx size=0x%x\n",
|
| 288 |
(unsigned long long)taddr, size); |
| 289 |
#endif
|
| 290 |
|
| 291 |
memset(zeroes, 0, size);
|
| 292 |
return spapr_tce_dma_write(dev, taddr, zeroes, size);
|
| 293 |
} |
| 294 |
|
| 295 |
void stb_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint8_t val)
|
| 296 |
{
|
| 297 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
| 298 |
} |
| 299 |
|
| 300 |
void sth_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint16_t val)
|
| 301 |
{
|
| 302 |
val = tswap16(val); |
| 303 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
| 304 |
} |
| 305 |
|
| 306 |
|
| 307 |
void stw_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t val)
|
| 308 |
{
|
| 309 |
val = tswap32(val); |
| 310 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
| 311 |
} |
| 312 |
|
| 313 |
void stq_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint64_t val)
|
| 314 |
{
|
| 315 |
val = tswap64(val); |
| 316 |
spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
|
| 317 |
} |
| 318 |
|
| 319 |
int spapr_tce_dma_read(VIOsPAPRDevice *dev, uint64_t taddr, void *buf, |
| 320 |
uint32_t size) |
| 321 |
{
|
| 322 |
#ifdef DEBUG_TCE
|
| 323 |
fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
|
| 324 |
(unsigned long long)taddr, size); |
| 325 |
#endif
|
| 326 |
|
| 327 |
/* Check for bypass */
|
| 328 |
if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
|
| 329 |
cpu_physical_memory_read(taddr, buf, size); |
| 330 |
return 0; |
| 331 |
} |
| 332 |
|
| 333 |
while (size) {
|
| 334 |
uint64_t tce; |
| 335 |
uint32_t lsize; |
| 336 |
uint64_t txaddr; |
| 337 |
|
| 338 |
/* Check if we are in bound */
|
| 339 |
if (taddr >= dev->rtce_window_size) {
|
| 340 |
#ifdef DEBUG_TCE
|
| 341 |
fprintf(stderr, "spapr_tce_dma_read out of bounds\n");
|
| 342 |
#endif
|
| 343 |
return H_DEST_PARM;
|
| 344 |
} |
| 345 |
tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce; |
| 346 |
|
| 347 |
/* How much til end of page ? */
|
| 348 |
lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
|
| 349 |
|
| 350 |
/* Check TCE */
|
| 351 |
if (!(tce & 1)) { |
| 352 |
return H_DEST_PARM;
|
| 353 |
} |
| 354 |
|
| 355 |
/* Translate */
|
| 356 |
txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) | |
| 357 |
(taddr & SPAPR_VIO_TCE_PAGE_MASK); |
| 358 |
|
| 359 |
#ifdef DEBUG_TCE
|
| 360 |
fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
|
| 361 |
(unsigned long long)txaddr, lsize); |
| 362 |
#endif
|
| 363 |
/* Do it */
|
| 364 |
cpu_physical_memory_read(txaddr, buf, lsize); |
| 365 |
buf += lsize; |
| 366 |
taddr += lsize; |
| 367 |
size -= lsize; |
| 368 |
} |
| 369 |
return H_SUCCESS;
|
| 370 |
} |
| 371 |
|
| 372 |
uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr) |
| 373 |
{
|
| 374 |
uint64_t val; |
| 375 |
|
| 376 |
spapr_tce_dma_read(dev, taddr, &val, sizeof(val));
|
| 377 |
return tswap64(val);
|
| 378 |
} |
| 379 |
|
| 380 |
/*
|
| 381 |
* CRQ handling
|
| 382 |
*/
|
| 383 |
static target_ulong h_reg_crq(CPUState *env, sPAPREnvironment *spapr,
|
| 384 |
target_ulong opcode, target_ulong *args) |
| 385 |
{
|
| 386 |
target_ulong reg = args[0];
|
| 387 |
target_ulong queue_addr = args[1];
|
| 388 |
target_ulong queue_len = args[2];
|
| 389 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 390 |
|
| 391 |
if (!dev) {
|
| 392 |
hcall_dprintf("h_reg_crq on non-existent unit 0x"
|
| 393 |
TARGET_FMT_lx "\n", reg);
|
| 394 |
return H_PARAMETER;
|
| 395 |
} |
| 396 |
|
| 397 |
/* We can't grok a queue size bigger than 256M for now */
|
| 398 |
if (queue_len < 0x1000 || queue_len > 0x10000000) { |
| 399 |
hcall_dprintf("h_reg_crq, queue size too small or too big (0x%llx)\n",
|
| 400 |
(unsigned long long)queue_len); |
| 401 |
return H_PARAMETER;
|
| 402 |
} |
| 403 |
|
| 404 |
/* Check queue alignment */
|
| 405 |
if (queue_addr & 0xfff) { |
| 406 |
hcall_dprintf("h_reg_crq, queue not aligned (0x%llx)\n",
|
| 407 |
(unsigned long long)queue_addr); |
| 408 |
return H_PARAMETER;
|
| 409 |
} |
| 410 |
|
| 411 |
/* Check if device supports CRQs */
|
| 412 |
if (!dev->crq.SendFunc) {
|
| 413 |
return H_NOT_FOUND;
|
| 414 |
} |
| 415 |
|
| 416 |
|
| 417 |
/* Already a queue ? */
|
| 418 |
if (dev->crq.qsize) {
|
| 419 |
return H_RESOURCE;
|
| 420 |
} |
| 421 |
dev->crq.qladdr = queue_addr; |
| 422 |
dev->crq.qsize = queue_len; |
| 423 |
dev->crq.qnext = 0;
|
| 424 |
|
| 425 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x" |
| 426 |
TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n", |
| 427 |
reg, queue_addr, queue_len); |
| 428 |
return H_SUCCESS;
|
| 429 |
} |
| 430 |
|
| 431 |
static target_ulong h_free_crq(CPUState *env, sPAPREnvironment *spapr,
|
| 432 |
target_ulong opcode, target_ulong *args) |
| 433 |
{
|
| 434 |
target_ulong reg = args[0];
|
| 435 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 436 |
|
| 437 |
if (!dev) {
|
| 438 |
hcall_dprintf("h_free_crq on non-existent unit 0x"
|
| 439 |
TARGET_FMT_lx "\n", reg);
|
| 440 |
return H_PARAMETER;
|
| 441 |
} |
| 442 |
|
| 443 |
dev->crq.qladdr = 0;
|
| 444 |
dev->crq.qsize = 0;
|
| 445 |
dev->crq.qnext = 0;
|
| 446 |
|
| 447 |
dprintf("CRQ for dev 0x" TARGET_FMT_lx " freed\n", reg); |
| 448 |
|
| 449 |
return H_SUCCESS;
|
| 450 |
} |
| 451 |
|
| 452 |
static target_ulong h_send_crq(CPUState *env, sPAPREnvironment *spapr,
|
| 453 |
target_ulong opcode, target_ulong *args) |
| 454 |
{
|
| 455 |
target_ulong reg = args[0];
|
| 456 |
target_ulong msg_hi = args[1];
|
| 457 |
target_ulong msg_lo = args[2];
|
| 458 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 459 |
uint64_t crq_mangle[2];
|
| 460 |
|
| 461 |
if (!dev) {
|
| 462 |
hcall_dprintf("h_send_crq on non-existent unit 0x"
|
| 463 |
TARGET_FMT_lx "\n", reg);
|
| 464 |
return H_PARAMETER;
|
| 465 |
} |
| 466 |
crq_mangle[0] = cpu_to_be64(msg_hi);
|
| 467 |
crq_mangle[1] = cpu_to_be64(msg_lo);
|
| 468 |
|
| 469 |
if (dev->crq.SendFunc) {
|
| 470 |
return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
|
| 471 |
} |
| 472 |
|
| 473 |
return H_HARDWARE;
|
| 474 |
} |
| 475 |
|
| 476 |
static target_ulong h_enable_crq(CPUState *env, sPAPREnvironment *spapr,
|
| 477 |
target_ulong opcode, target_ulong *args) |
| 478 |
{
|
| 479 |
target_ulong reg = args[0];
|
| 480 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 481 |
|
| 482 |
if (!dev) {
|
| 483 |
hcall_dprintf("h_enable_crq on non-existent unit 0x"
|
| 484 |
TARGET_FMT_lx "\n", reg);
|
| 485 |
return H_PARAMETER;
|
| 486 |
} |
| 487 |
|
| 488 |
return 0; |
| 489 |
} |
| 490 |
|
| 491 |
/* Returns negative error, 0 success, or positive: queue full */
|
| 492 |
int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
|
| 493 |
{
|
| 494 |
int rc;
|
| 495 |
uint8_t byte; |
| 496 |
|
| 497 |
if (!dev->crq.qsize) {
|
| 498 |
fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
|
| 499 |
return -1; |
| 500 |
} |
| 501 |
|
| 502 |
/* Maybe do a fast path for KVM just writing to the pages */
|
| 503 |
rc = spapr_tce_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
|
| 504 |
if (rc) {
|
| 505 |
return rc;
|
| 506 |
} |
| 507 |
if (byte != 0) { |
| 508 |
return 1; |
| 509 |
} |
| 510 |
|
| 511 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
|
| 512 |
&crq[8], 8); |
| 513 |
if (rc) {
|
| 514 |
return rc;
|
| 515 |
} |
| 516 |
|
| 517 |
kvmppc_eieio(); |
| 518 |
|
| 519 |
rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
|
| 520 |
if (rc) {
|
| 521 |
return rc;
|
| 522 |
} |
| 523 |
|
| 524 |
dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
|
| 525 |
|
| 526 |
if (dev->signal_state & 1) { |
| 527 |
qemu_irq_pulse(dev->qirq); |
| 528 |
} |
| 529 |
|
| 530 |
return 0; |
| 531 |
} |
| 532 |
|
| 533 |
/* "quiesce" handling */
|
| 534 |
|
| 535 |
static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev) |
| 536 |
{
|
| 537 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
| 538 |
|
| 539 |
if (dev->rtce_table) {
|
| 540 |
size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT) |
| 541 |
* sizeof(VIOsPAPR_RTCE);
|
| 542 |
memset(dev->rtce_table, 0, size);
|
| 543 |
} |
| 544 |
|
| 545 |
dev->crq.qladdr = 0;
|
| 546 |
dev->crq.qsize = 0;
|
| 547 |
dev->crq.qnext = 0;
|
| 548 |
} |
| 549 |
|
| 550 |
static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token, |
| 551 |
uint32_t nargs, target_ulong args, |
| 552 |
uint32_t nret, target_ulong rets) |
| 553 |
{
|
| 554 |
VIOsPAPRBus *bus = spapr->vio_bus; |
| 555 |
VIOsPAPRDevice *dev; |
| 556 |
uint32_t unit, enable; |
| 557 |
|
| 558 |
if (nargs != 2) { |
| 559 |
rtas_st(rets, 0, -3); |
| 560 |
return;
|
| 561 |
} |
| 562 |
unit = rtas_ld(args, 0);
|
| 563 |
enable = rtas_ld(args, 1);
|
| 564 |
dev = spapr_vio_find_by_reg(bus, unit); |
| 565 |
if (!dev) {
|
| 566 |
rtas_st(rets, 0, -3); |
| 567 |
return;
|
| 568 |
} |
| 569 |
if (enable) {
|
| 570 |
dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS; |
| 571 |
} else {
|
| 572 |
dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS; |
| 573 |
} |
| 574 |
|
| 575 |
rtas_st(rets, 0, 0); |
| 576 |
} |
| 577 |
|
| 578 |
static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token, |
| 579 |
uint32_t nargs, target_ulong args, |
| 580 |
uint32_t nret, target_ulong rets) |
| 581 |
{
|
| 582 |
VIOsPAPRBus *bus = spapr->vio_bus; |
| 583 |
DeviceState *qdev; |
| 584 |
VIOsPAPRDevice *dev = NULL;
|
| 585 |
|
| 586 |
if (nargs != 0) { |
| 587 |
rtas_st(rets, 0, -3); |
| 588 |
return;
|
| 589 |
} |
| 590 |
|
| 591 |
QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
|
| 592 |
dev = (VIOsPAPRDevice *)qdev; |
| 593 |
spapr_vio_quiesce_one(dev); |
| 594 |
} |
| 595 |
|
| 596 |
rtas_st(rets, 0, 0); |
| 597 |
} |
| 598 |
|
| 599 |
static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo) |
| 600 |
{
|
| 601 |
VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; |
| 602 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
| 603 |
char *id;
|
| 604 |
|
| 605 |
if (asprintf(&id, "%s@%x", info->dt_name, dev->reg) < 0) { |
| 606 |
return -1; |
| 607 |
} |
| 608 |
|
| 609 |
dev->qdev.id = id; |
| 610 |
|
| 611 |
dev->qirq = spapr_allocate_irq(dev->vio_irq_num, &dev->vio_irq_num); |
| 612 |
if (!dev->qirq) {
|
| 613 |
return -1; |
| 614 |
} |
| 615 |
|
| 616 |
rtce_init(dev); |
| 617 |
|
| 618 |
return info->init(dev);
|
| 619 |
} |
| 620 |
|
| 621 |
void spapr_vio_bus_register_withprop(VIOsPAPRDeviceInfo *info)
|
| 622 |
{
|
| 623 |
info->qdev.init = spapr_vio_busdev_init; |
| 624 |
info->qdev.bus_info = &spapr_vio_bus_info; |
| 625 |
|
| 626 |
assert(info->qdev.size >= sizeof(VIOsPAPRDevice));
|
| 627 |
qdev_register(&info->qdev); |
| 628 |
} |
| 629 |
|
| 630 |
static target_ulong h_vio_signal(CPUState *env, sPAPREnvironment *spapr,
|
| 631 |
target_ulong opcode, |
| 632 |
target_ulong *args) |
| 633 |
{
|
| 634 |
target_ulong reg = args[0];
|
| 635 |
target_ulong mode = args[1];
|
| 636 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 637 |
VIOsPAPRDeviceInfo *info; |
| 638 |
|
| 639 |
if (!dev) {
|
| 640 |
return H_PARAMETER;
|
| 641 |
} |
| 642 |
|
| 643 |
info = (VIOsPAPRDeviceInfo *)dev->qdev.info; |
| 644 |
|
| 645 |
if (mode & ~info->signal_mask) {
|
| 646 |
return H_PARAMETER;
|
| 647 |
} |
| 648 |
|
| 649 |
dev->signal_state = mode; |
| 650 |
|
| 651 |
return H_SUCCESS;
|
| 652 |
} |
| 653 |
|
| 654 |
VIOsPAPRBus *spapr_vio_bus_init(void)
|
| 655 |
{
|
| 656 |
VIOsPAPRBus *bus; |
| 657 |
BusState *qbus; |
| 658 |
DeviceState *dev; |
| 659 |
DeviceInfo *qinfo; |
| 660 |
|
| 661 |
/* Create bridge device */
|
| 662 |
dev = qdev_create(NULL, "spapr-vio-bridge"); |
| 663 |
qdev_init_nofail(dev); |
| 664 |
|
| 665 |
/* Create bus on bridge device */
|
| 666 |
|
| 667 |
qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio");
|
| 668 |
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); |
| 669 |
|
| 670 |
/* hcall-vio */
|
| 671 |
spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
| 672 |
|
| 673 |
/* hcall-tce */
|
| 674 |
spapr_register_hypercall(H_PUT_TCE, h_put_tce); |
| 675 |
|
| 676 |
/* hcall-crq */
|
| 677 |
spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
| 678 |
spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
| 679 |
spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
| 680 |
spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
| 681 |
|
| 682 |
/* RTAS calls */
|
| 683 |
spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
|
| 684 |
spapr_rtas_register("quiesce", rtas_quiesce);
|
| 685 |
|
| 686 |
for (qinfo = device_info_list; qinfo; qinfo = qinfo->next) {
|
| 687 |
VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; |
| 688 |
|
| 689 |
if (qinfo->bus_info != &spapr_vio_bus_info) {
|
| 690 |
continue;
|
| 691 |
} |
| 692 |
|
| 693 |
if (info->hcalls) {
|
| 694 |
info->hcalls(bus); |
| 695 |
} |
| 696 |
} |
| 697 |
|
| 698 |
return bus;
|
| 699 |
} |
| 700 |
|
| 701 |
/* Represents sPAPR hcall VIO devices */
|
| 702 |
|
| 703 |
static int spapr_vio_bridge_init(SysBusDevice *dev) |
| 704 |
{
|
| 705 |
/* nothing */
|
| 706 |
return 0; |
| 707 |
} |
| 708 |
|
| 709 |
static SysBusDeviceInfo spapr_vio_bridge_info = {
|
| 710 |
.init = spapr_vio_bridge_init, |
| 711 |
.qdev.name = "spapr-vio-bridge",
|
| 712 |
.qdev.size = sizeof(SysBusDevice),
|
| 713 |
.qdev.no_user = 1,
|
| 714 |
}; |
| 715 |
|
| 716 |
static void spapr_vio_register_devices(void) |
| 717 |
{
|
| 718 |
sysbus_register_withprop(&spapr_vio_bridge_info); |
| 719 |
} |
| 720 |
|
| 721 |
device_init(spapr_vio_register_devices) |
| 722 |
|
| 723 |
#ifdef CONFIG_FDT
|
| 724 |
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) |
| 725 |
{
|
| 726 |
DeviceState *qdev; |
| 727 |
int ret = 0; |
| 728 |
|
| 729 |
QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
|
| 730 |
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; |
| 731 |
|
| 732 |
ret = vio_make_devnode(dev, fdt); |
| 733 |
|
| 734 |
if (ret < 0) { |
| 735 |
return ret;
|
| 736 |
} |
| 737 |
} |
| 738 |
|
| 739 |
return 0; |
| 740 |
} |
| 741 |
#endif /* CONFIG_FDT */ |