macio.c (14257B)
1 /* 2 * QEMU IDE Emulation: MacIO support. 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * Copyright (c) 2006 Openedhand Ltd. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "hw/ppc/mac_dbdma.h" 28 #include "hw/qdev-properties.h" 29 #include "migration/vmstate.h" 30 #include "qemu/module.h" 31 #include "hw/misc/macio/macio.h" 32 #include "sysemu/block-backend.h" 33 #include "sysemu/dma.h" 34 35 #include "hw/ide/internal.h" 36 37 /* debug MACIO */ 38 // #define DEBUG_MACIO 39 40 #ifdef DEBUG_MACIO 41 static const int debug_macio = 1; 42 #else 43 static const int debug_macio = 0; 44 #endif 45 46 #define MACIO_DPRINTF(fmt, ...) do { \ 47 if (debug_macio) { \ 48 printf(fmt , ## __VA_ARGS__); \ 49 } \ 50 } while (0) 51 52 53 /***********************************************************/ 54 /* MacIO based PowerPC IDE */ 55 56 #define MACIO_PAGE_SIZE 4096 57 58 static void pmac_ide_atapi_transfer_cb(void *opaque, int ret) 59 { 60 DBDMA_io *io = opaque; 61 MACIOIDEState *m = io->opaque; 62 IDEState *s = idebus_active_if(&m->bus); 63 int64_t offset; 64 65 MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n"); 66 67 if (ret < 0) { 68 MACIO_DPRINTF("DMA error: %d\n", ret); 69 qemu_sglist_destroy(&s->sg); 70 ide_atapi_io_error(s, ret); 71 goto done; 72 } 73 74 if (!m->dma_active) { 75 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n", 76 s->nsector, io->len, s->status); 77 /* data not ready yet, wait for the channel to get restarted */ 78 io->processing = false; 79 return; 80 } 81 82 if (s->io_buffer_size <= 0) { 83 MACIO_DPRINTF("End of IDE transfer\n"); 84 qemu_sglist_destroy(&s->sg); 85 ide_atapi_cmd_ok(s); 86 m->dma_active = false; 87 goto done; 88 } 89 90 if (io->len == 0) { 91 MACIO_DPRINTF("End of DMA transfer\n"); 92 goto done; 93 } 94 95 if (s->lba == -1) { 96 /* Non-block ATAPI transfer - just copy to RAM */ 97 s->io_buffer_size = MIN(s->io_buffer_size, io->len); 98 dma_memory_write(&address_space_memory, io->addr, s->io_buffer, 99 s->io_buffer_size, MEMTXATTRS_UNSPECIFIED); 100 io->len = 0; 101 ide_atapi_cmd_ok(s); 102 m->dma_active = false; 103 goto done; 104 } 105 106 /* Calculate current offset */ 107 offset = ((int64_t)s->lba << 11) + s->io_buffer_index; 108 109 qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1, 110 &address_space_memory); 111 qemu_sglist_add(&s->sg, io->addr, io->len); 112 s->io_buffer_size -= io->len; 113 s->io_buffer_index += io->len; 114 io->len = 0; 115 116 s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, 0x1, 117 pmac_ide_atapi_transfer_cb, io); 118 return; 119 120 done: 121 dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len, 122 io->dir, io->dma_len); 123 124 if (ret < 0) { 125 block_acct_failed(blk_get_stats(s->blk), &s->acct); 126 } else { 127 block_acct_done(blk_get_stats(s->blk), &s->acct); 128 } 129 130 ide_set_inactive(s, false); 131 io->dma_end(opaque); 132 } 133 134 static void pmac_ide_transfer_cb(void *opaque, int ret) 135 { 136 DBDMA_io *io = opaque; 137 MACIOIDEState *m = io->opaque; 138 IDEState *s = idebus_active_if(&m->bus); 139 int64_t offset; 140 141 MACIO_DPRINTF("pmac_ide_transfer_cb\n"); 142 143 if (ret < 0) { 144 MACIO_DPRINTF("DMA error: %d\n", ret); 145 qemu_sglist_destroy(&s->sg); 146 ide_dma_error(s); 147 goto done; 148 } 149 150 if (!m->dma_active) { 151 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n", 152 s->nsector, io->len, s->status); 153 /* data not ready yet, wait for the channel to get restarted */ 154 io->processing = false; 155 return; 156 } 157 158 if (s->io_buffer_size <= 0) { 159 MACIO_DPRINTF("End of IDE transfer\n"); 160 qemu_sglist_destroy(&s->sg); 161 s->status = READY_STAT | SEEK_STAT; 162 ide_set_irq(s->bus); 163 m->dma_active = false; 164 goto done; 165 } 166 167 if (io->len == 0) { 168 MACIO_DPRINTF("End of DMA transfer\n"); 169 goto done; 170 } 171 172 /* Calculate number of sectors */ 173 offset = (ide_get_sector(s) << 9) + s->io_buffer_index; 174 175 qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1, 176 &address_space_memory); 177 qemu_sglist_add(&s->sg, io->addr, io->len); 178 s->io_buffer_size -= io->len; 179 s->io_buffer_index += io->len; 180 io->len = 0; 181 182 switch (s->dma_cmd) { 183 case IDE_DMA_READ: 184 s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, 0x1, 185 pmac_ide_atapi_transfer_cb, io); 186 break; 187 case IDE_DMA_WRITE: 188 s->bus->dma->aiocb = dma_blk_write(s->blk, &s->sg, offset, 0x1, 189 pmac_ide_transfer_cb, io); 190 break; 191 case IDE_DMA_TRIM: 192 s->bus->dma->aiocb = dma_blk_io(blk_get_aio_context(s->blk), &s->sg, 193 offset, 0x1, ide_issue_trim, s, 194 pmac_ide_transfer_cb, io, 195 DMA_DIRECTION_TO_DEVICE); 196 break; 197 default: 198 abort(); 199 } 200 201 return; 202 203 done: 204 dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len, 205 io->dir, io->dma_len); 206 207 if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) { 208 if (ret < 0) { 209 block_acct_failed(blk_get_stats(s->blk), &s->acct); 210 } else { 211 block_acct_done(blk_get_stats(s->blk), &s->acct); 212 } 213 } 214 215 ide_set_inactive(s, false); 216 io->dma_end(opaque); 217 } 218 219 static void pmac_ide_transfer(DBDMA_io *io) 220 { 221 MACIOIDEState *m = io->opaque; 222 IDEState *s = idebus_active_if(&m->bus); 223 224 MACIO_DPRINTF("\n"); 225 226 if (s->drive_kind == IDE_CD) { 227 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len, 228 BLOCK_ACCT_READ); 229 230 pmac_ide_atapi_transfer_cb(io, 0); 231 return; 232 } 233 234 switch (s->dma_cmd) { 235 case IDE_DMA_READ: 236 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len, 237 BLOCK_ACCT_READ); 238 break; 239 case IDE_DMA_WRITE: 240 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len, 241 BLOCK_ACCT_WRITE); 242 break; 243 default: 244 break; 245 } 246 247 pmac_ide_transfer_cb(io, 0); 248 } 249 250 static void pmac_ide_flush(DBDMA_io *io) 251 { 252 MACIOIDEState *m = io->opaque; 253 IDEState *s = idebus_active_if(&m->bus); 254 255 if (s->bus->dma->aiocb) { 256 blk_drain(s->blk); 257 } 258 } 259 260 /* PowerMac IDE memory IO */ 261 static uint64_t pmac_ide_read(void *opaque, hwaddr addr, unsigned size) 262 { 263 MACIOIDEState *d = opaque; 264 uint64_t retval = 0xffffffff; 265 int reg = addr >> 4; 266 267 switch (reg) { 268 case 0x0: 269 if (size == 1) { 270 retval = ide_data_readw(&d->bus, 0) & 0xFF; 271 } else if (size == 2) { 272 retval = ide_data_readw(&d->bus, 0); 273 } else if (size == 4) { 274 retval = ide_data_readl(&d->bus, 0); 275 } 276 break; 277 case 0x1 ... 0x7: 278 if (size == 1) { 279 retval = ide_ioport_read(&d->bus, reg); 280 } 281 break; 282 case 0x8: 283 case 0x16: 284 if (size == 1) { 285 retval = ide_status_read(&d->bus, 0); 286 } 287 break; 288 case 0x20: 289 if (size == 4) { 290 retval = d->timing_reg; 291 } 292 break; 293 case 0x30: 294 /* This is an interrupt state register that only exists 295 * in the KeyLargo and later variants. Bit 0x8000_0000 296 * latches the DMA interrupt and has to be written to 297 * clear. Bit 0x4000_0000 is an image of the disk 298 * interrupt. MacOS X relies on this and will hang if 299 * we don't provide at least the disk interrupt 300 */ 301 if (size == 4) { 302 retval = d->irq_reg; 303 } 304 break; 305 } 306 307 return retval; 308 } 309 310 311 static void pmac_ide_write(void *opaque, hwaddr addr, uint64_t val, 312 unsigned size) 313 { 314 MACIOIDEState *d = opaque; 315 int reg = addr >> 4; 316 317 switch (reg) { 318 case 0x0: 319 if (size == 2) { 320 ide_data_writew(&d->bus, 0, val); 321 } else if (size == 4) { 322 ide_data_writel(&d->bus, 0, val); 323 } 324 break; 325 case 0x1 ... 0x7: 326 if (size == 1) { 327 ide_ioport_write(&d->bus, reg, val); 328 } 329 break; 330 case 0x8: 331 case 0x16: 332 if (size == 1) { 333 ide_ctrl_write(&d->bus, 0, val); 334 } 335 break; 336 case 0x20: 337 if (size == 4) { 338 d->timing_reg = val; 339 } 340 break; 341 case 0x30: 342 if (size == 4) { 343 if (val & 0x80000000u) { 344 d->irq_reg &= 0x7fffffff; 345 } 346 } 347 break; 348 } 349 } 350 351 static const MemoryRegionOps pmac_ide_ops = { 352 .read = pmac_ide_read, 353 .write = pmac_ide_write, 354 .valid.min_access_size = 1, 355 .valid.max_access_size = 4, 356 .endianness = DEVICE_LITTLE_ENDIAN, 357 }; 358 359 static const VMStateDescription vmstate_pmac = { 360 .name = "ide", 361 .version_id = 5, 362 .minimum_version_id = 0, 363 .fields = (VMStateField[]) { 364 VMSTATE_IDE_BUS(bus, MACIOIDEState), 365 VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState), 366 VMSTATE_BOOL(dma_active, MACIOIDEState), 367 VMSTATE_UINT32(timing_reg, MACIOIDEState), 368 VMSTATE_UINT32(irq_reg, MACIOIDEState), 369 VMSTATE_END_OF_LIST() 370 } 371 }; 372 373 static void macio_ide_reset(DeviceState *dev) 374 { 375 MACIOIDEState *d = MACIO_IDE(dev); 376 377 ide_bus_reset(&d->bus); 378 } 379 380 static int ide_nop_int(const IDEDMA *dma, bool is_write) 381 { 382 return 0; 383 } 384 385 static int32_t ide_nop_int32(const IDEDMA *dma, int32_t l) 386 { 387 return 0; 388 } 389 390 static void ide_dbdma_start(const IDEDMA *dma, IDEState *s, 391 BlockCompletionFunc *cb) 392 { 393 MACIOIDEState *m = container_of(dma, MACIOIDEState, dma); 394 395 s->io_buffer_index = 0; 396 if (s->drive_kind == IDE_CD) { 397 s->io_buffer_size = s->packet_transfer_size; 398 } else { 399 s->io_buffer_size = s->nsector * BDRV_SECTOR_SIZE; 400 } 401 402 MACIO_DPRINTF("\n\n------------ IDE transfer\n"); 403 MACIO_DPRINTF("buffer_size: %x buffer_index: %x\n", 404 s->io_buffer_size, s->io_buffer_index); 405 MACIO_DPRINTF("lba: %x size: %x\n", s->lba, s->io_buffer_size); 406 MACIO_DPRINTF("-------------------------\n"); 407 408 m->dma_active = true; 409 DBDMA_kick(m->dbdma); 410 } 411 412 static const IDEDMAOps dbdma_ops = { 413 .start_dma = ide_dbdma_start, 414 .prepare_buf = ide_nop_int32, 415 .rw_buf = ide_nop_int, 416 }; 417 418 static void macio_ide_realizefn(DeviceState *dev, Error **errp) 419 { 420 MACIOIDEState *s = MACIO_IDE(dev); 421 422 ide_init2(&s->bus, s->ide_irq); 423 424 /* Register DMA callbacks */ 425 s->dma.ops = &dbdma_ops; 426 s->bus.dma = &s->dma; 427 } 428 429 static void pmac_ide_irq(void *opaque, int n, int level) 430 { 431 MACIOIDEState *s = opaque; 432 uint32_t mask = 0x80000000u >> n; 433 434 /* We need to reflect the IRQ state in the irq register */ 435 if (level) { 436 s->irq_reg |= mask; 437 } else { 438 s->irq_reg &= ~mask; 439 } 440 441 if (n) { 442 qemu_set_irq(s->real_ide_irq, level); 443 } else { 444 qemu_set_irq(s->real_dma_irq, level); 445 } 446 } 447 448 static void macio_ide_initfn(Object *obj) 449 { 450 SysBusDevice *d = SYS_BUS_DEVICE(obj); 451 MACIOIDEState *s = MACIO_IDE(obj); 452 453 ide_bus_init(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2); 454 memory_region_init_io(&s->mem, obj, &pmac_ide_ops, s, "pmac-ide", 0x1000); 455 sysbus_init_mmio(d, &s->mem); 456 sysbus_init_irq(d, &s->real_ide_irq); 457 sysbus_init_irq(d, &s->real_dma_irq); 458 s->dma_irq = qemu_allocate_irq(pmac_ide_irq, s, 0); 459 s->ide_irq = qemu_allocate_irq(pmac_ide_irq, s, 1); 460 461 object_property_add_link(obj, "dbdma", TYPE_MAC_DBDMA, 462 (Object **) &s->dbdma, 463 qdev_prop_allow_set_link_before_realize, 0); 464 } 465 466 static Property macio_ide_properties[] = { 467 DEFINE_PROP_UINT32("channel", MACIOIDEState, channel, 0), 468 DEFINE_PROP_UINT32("addr", MACIOIDEState, addr, -1), 469 DEFINE_PROP_END_OF_LIST(), 470 }; 471 472 static void macio_ide_class_init(ObjectClass *oc, void *data) 473 { 474 DeviceClass *dc = DEVICE_CLASS(oc); 475 476 dc->realize = macio_ide_realizefn; 477 dc->reset = macio_ide_reset; 478 device_class_set_props(dc, macio_ide_properties); 479 dc->vmsd = &vmstate_pmac; 480 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 481 } 482 483 static const TypeInfo macio_ide_type_info = { 484 .name = TYPE_MACIO_IDE, 485 .parent = TYPE_SYS_BUS_DEVICE, 486 .instance_size = sizeof(MACIOIDEState), 487 .instance_init = macio_ide_initfn, 488 .class_init = macio_ide_class_init, 489 }; 490 491 static void macio_ide_register_types(void) 492 { 493 type_register_static(&macio_ide_type_info); 494 } 495 496 /* hd_table must contain 2 block drivers */ 497 void macio_ide_init_drives(MACIOIDEState *s, DriveInfo **hd_table) 498 { 499 int i; 500 501 for (i = 0; i < 2; i++) { 502 if (hd_table[i]) { 503 ide_create_drive(&s->bus, i, hd_table[i]); 504 } 505 } 506 } 507 508 void macio_ide_register_dma(MACIOIDEState *s) 509 { 510 DBDMA_register_channel(s->dbdma, s->channel, s->dma_irq, 511 pmac_ide_transfer, pmac_ide_flush, s); 512 } 513 514 type_init(macio_ide_register_types)