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/irq.h" 28 #include "hw/ppc/mac_dbdma.h" 29 #include "hw/qdev-properties.h" 30 #include "migration/vmstate.h" 31 #include "qemu/module.h" 32 #include "hw/misc/macio/macio.h" 33 #include "sysemu/block-backend.h" 34 #include "sysemu/dma.h" 35 36 #include "hw/ide/internal.h" 37 38 /* debug MACIO */ 39 // #define DEBUG_MACIO 40 41 #ifdef DEBUG_MACIO 42 static const int debug_macio = 1; 43 #else 44 static const int debug_macio = 0; 45 #endif 46 47 #define MACIO_DPRINTF(fmt, ...) do { \ 48 if (debug_macio) { \ 49 printf(fmt , ## __VA_ARGS__); \ 50 } \ 51 } while (0) 52 53 54 /***********************************************************/ 55 /* MacIO based PowerPC IDE */ 56 57 #define MACIO_PAGE_SIZE 4096 58 59 static void pmac_ide_atapi_transfer_cb(void *opaque, int ret) 60 { 61 DBDMA_io *io = opaque; 62 MACIOIDEState *m = io->opaque; 63 IDEState *s = ide_bus_active_if(&m->bus); 64 int64_t offset; 65 66 MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n"); 67 68 if (ret < 0) { 69 MACIO_DPRINTF("DMA error: %d\n", ret); 70 qemu_sglist_destroy(&s->sg); 71 ide_atapi_io_error(s, ret); 72 goto done; 73 } 74 75 if (!m->dma_active) { 76 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n", 77 s->nsector, io->len, s->status); 78 /* data not ready yet, wait for the channel to get restarted */ 79 io->processing = false; 80 return; 81 } 82 83 if (s->io_buffer_size <= 0) { 84 MACIO_DPRINTF("End of IDE transfer\n"); 85 qemu_sglist_destroy(&s->sg); 86 ide_atapi_cmd_ok(s); 87 m->dma_active = false; 88 goto done; 89 } 90 91 if (io->len == 0) { 92 MACIO_DPRINTF("End of DMA transfer\n"); 93 goto done; 94 } 95 96 if (s->lba == -1) { 97 /* Non-block ATAPI transfer - just copy to RAM */ 98 s->io_buffer_size = MIN(s->io_buffer_size, io->len); 99 dma_memory_write(&address_space_memory, io->addr, s->io_buffer, 100 s->io_buffer_size, MEMTXATTRS_UNSPECIFIED); 101 io->len = 0; 102 ide_atapi_cmd_ok(s); 103 m->dma_active = false; 104 goto done; 105 } 106 107 /* Calculate current offset */ 108 offset = ((int64_t)s->lba << 11) + s->io_buffer_index; 109 110 qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1, 111 &address_space_memory); 112 qemu_sglist_add(&s->sg, io->addr, io->len); 113 s->io_buffer_size -= io->len; 114 s->io_buffer_index += io->len; 115 io->len = 0; 116 117 s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, 0x1, 118 pmac_ide_atapi_transfer_cb, io); 119 return; 120 121 done: 122 dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len, 123 io->dir, io->dma_len); 124 125 if (ret < 0) { 126 block_acct_failed(blk_get_stats(s->blk), &s->acct); 127 } else { 128 block_acct_done(blk_get_stats(s->blk), &s->acct); 129 } 130 131 ide_set_inactive(s, false); 132 io->dma_end(opaque); 133 } 134 135 static void pmac_ide_transfer_cb(void *opaque, int ret) 136 { 137 DBDMA_io *io = opaque; 138 MACIOIDEState *m = io->opaque; 139 IDEState *s = ide_bus_active_if(&m->bus); 140 int64_t offset; 141 142 MACIO_DPRINTF("pmac_ide_transfer_cb\n"); 143 144 if (ret < 0) { 145 MACIO_DPRINTF("DMA error: %d\n", ret); 146 qemu_sglist_destroy(&s->sg); 147 ide_dma_error(s); 148 goto done; 149 } 150 151 if (!m->dma_active) { 152 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n", 153 s->nsector, io->len, s->status); 154 /* data not ready yet, wait for the channel to get restarted */ 155 io->processing = false; 156 return; 157 } 158 159 if (s->io_buffer_size <= 0) { 160 MACIO_DPRINTF("End of IDE transfer\n"); 161 qemu_sglist_destroy(&s->sg); 162 s->status = READY_STAT | SEEK_STAT; 163 ide_bus_set_irq(s->bus); 164 m->dma_active = false; 165 goto done; 166 } 167 168 if (io->len == 0) { 169 MACIO_DPRINTF("End of DMA transfer\n"); 170 goto done; 171 } 172 173 /* Calculate number of sectors */ 174 offset = (ide_get_sector(s) << 9) + s->io_buffer_index; 175 176 qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1, 177 &address_space_memory); 178 qemu_sglist_add(&s->sg, io->addr, io->len); 179 s->io_buffer_size -= io->len; 180 s->io_buffer_index += io->len; 181 io->len = 0; 182 183 switch (s->dma_cmd) { 184 case IDE_DMA_READ: 185 s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, 0x1, 186 pmac_ide_atapi_transfer_cb, io); 187 break; 188 case IDE_DMA_WRITE: 189 s->bus->dma->aiocb = dma_blk_write(s->blk, &s->sg, offset, 0x1, 190 pmac_ide_transfer_cb, io); 191 break; 192 case IDE_DMA_TRIM: 193 s->bus->dma->aiocb = dma_blk_io(blk_get_aio_context(s->blk), &s->sg, 194 offset, 0x1, ide_issue_trim, s, 195 pmac_ide_transfer_cb, io, 196 DMA_DIRECTION_TO_DEVICE); 197 break; 198 default: 199 abort(); 200 } 201 202 return; 203 204 done: 205 dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len, 206 io->dir, io->dma_len); 207 208 if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) { 209 if (ret < 0) { 210 block_acct_failed(blk_get_stats(s->blk), &s->acct); 211 } else { 212 block_acct_done(blk_get_stats(s->blk), &s->acct); 213 } 214 } 215 216 ide_set_inactive(s, false); 217 io->dma_end(opaque); 218 } 219 220 static void pmac_ide_transfer(DBDMA_io *io) 221 { 222 MACIOIDEState *m = io->opaque; 223 IDEState *s = ide_bus_active_if(&m->bus); 224 225 MACIO_DPRINTF("\n"); 226 227 if (s->drive_kind == IDE_CD) { 228 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len, 229 BLOCK_ACCT_READ); 230 231 pmac_ide_atapi_transfer_cb(io, 0); 232 return; 233 } 234 235 switch (s->dma_cmd) { 236 case IDE_DMA_READ: 237 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len, 238 BLOCK_ACCT_READ); 239 break; 240 case IDE_DMA_WRITE: 241 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len, 242 BLOCK_ACCT_WRITE); 243 break; 244 default: 245 break; 246 } 247 248 pmac_ide_transfer_cb(io, 0); 249 } 250 251 static void pmac_ide_flush(DBDMA_io *io) 252 { 253 MACIOIDEState *m = io->opaque; 254 IDEState *s = ide_bus_active_if(&m->bus); 255 256 if (s->bus->dma->aiocb) { 257 blk_drain(s->blk); 258 } 259 } 260 261 /* PowerMac IDE memory IO */ 262 static uint64_t pmac_ide_read(void *opaque, hwaddr addr, unsigned size) 263 { 264 MACIOIDEState *d = opaque; 265 uint64_t retval = 0xffffffff; 266 int reg = addr >> 4; 267 268 switch (reg) { 269 case 0x0: 270 if (size == 1) { 271 retval = ide_data_readw(&d->bus, 0) & 0xFF; 272 } else if (size == 2) { 273 retval = ide_data_readw(&d->bus, 0); 274 } else if (size == 4) { 275 retval = ide_data_readl(&d->bus, 0); 276 } 277 break; 278 case 0x1 ... 0x7: 279 if (size == 1) { 280 retval = ide_ioport_read(&d->bus, reg); 281 } 282 break; 283 case 0x8: 284 case 0x16: 285 if (size == 1) { 286 retval = ide_status_read(&d->bus, 0); 287 } 288 break; 289 case 0x20: 290 if (size == 4) { 291 retval = d->timing_reg; 292 } 293 break; 294 case 0x30: 295 /* This is an interrupt state register that only exists 296 * in the KeyLargo and later variants. Bit 0x8000_0000 297 * latches the DMA interrupt and has to be written to 298 * clear. Bit 0x4000_0000 is an image of the disk 299 * interrupt. MacOS X relies on this and will hang if 300 * we don't provide at least the disk interrupt 301 */ 302 if (size == 4) { 303 retval = d->irq_reg; 304 } 305 break; 306 } 307 308 return retval; 309 } 310 311 312 static void pmac_ide_write(void *opaque, hwaddr addr, uint64_t val, 313 unsigned size) 314 { 315 MACIOIDEState *d = opaque; 316 int reg = addr >> 4; 317 318 switch (reg) { 319 case 0x0: 320 if (size == 2) { 321 ide_data_writew(&d->bus, 0, val); 322 } else if (size == 4) { 323 ide_data_writel(&d->bus, 0, val); 324 } 325 break; 326 case 0x1 ... 0x7: 327 if (size == 1) { 328 ide_ioport_write(&d->bus, reg, val); 329 } 330 break; 331 case 0x8: 332 case 0x16: 333 if (size == 1) { 334 ide_ctrl_write(&d->bus, 0, val); 335 } 336 break; 337 case 0x20: 338 if (size == 4) { 339 d->timing_reg = val; 340 } 341 break; 342 case 0x30: 343 if (size == 4) { 344 if (val & 0x80000000u) { 345 d->irq_reg &= 0x7fffffff; 346 } 347 } 348 break; 349 } 350 } 351 352 static const MemoryRegionOps pmac_ide_ops = { 353 .read = pmac_ide_read, 354 .write = pmac_ide_write, 355 .valid.min_access_size = 1, 356 .valid.max_access_size = 4, 357 .endianness = DEVICE_LITTLE_ENDIAN, 358 }; 359 360 static const VMStateDescription vmstate_pmac = { 361 .name = "ide", 362 .version_id = 5, 363 .minimum_version_id = 0, 364 .fields = (VMStateField[]) { 365 VMSTATE_IDE_BUS(bus, MACIOIDEState), 366 VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState), 367 VMSTATE_BOOL(dma_active, MACIOIDEState), 368 VMSTATE_UINT32(timing_reg, MACIOIDEState), 369 VMSTATE_UINT32(irq_reg, MACIOIDEState), 370 VMSTATE_END_OF_LIST() 371 } 372 }; 373 374 static void macio_ide_reset(DeviceState *dev) 375 { 376 MACIOIDEState *d = MACIO_IDE(dev); 377 378 ide_bus_reset(&d->bus); 379 } 380 381 static int ide_nop_int(const IDEDMA *dma, bool is_write) 382 { 383 return 0; 384 } 385 386 static int32_t ide_nop_int32(const IDEDMA *dma, int32_t l) 387 { 388 return 0; 389 } 390 391 static void ide_dbdma_start(const IDEDMA *dma, IDEState *s, 392 BlockCompletionFunc *cb) 393 { 394 MACIOIDEState *m = container_of(dma, MACIOIDEState, dma); 395 396 s->io_buffer_index = 0; 397 if (s->drive_kind == IDE_CD) { 398 s->io_buffer_size = s->packet_transfer_size; 399 } else { 400 s->io_buffer_size = s->nsector * BDRV_SECTOR_SIZE; 401 } 402 403 MACIO_DPRINTF("\n\n------------ IDE transfer\n"); 404 MACIO_DPRINTF("buffer_size: %x buffer_index: %x\n", 405 s->io_buffer_size, s->io_buffer_index); 406 MACIO_DPRINTF("lba: %x size: %x\n", s->lba, s->io_buffer_size); 407 MACIO_DPRINTF("-------------------------\n"); 408 409 m->dma_active = true; 410 DBDMA_kick(m->dbdma); 411 } 412 413 static const IDEDMAOps dbdma_ops = { 414 .start_dma = ide_dbdma_start, 415 .prepare_buf = ide_nop_int32, 416 .rw_buf = ide_nop_int, 417 }; 418 419 static void macio_ide_realizefn(DeviceState *dev, Error **errp) 420 { 421 MACIOIDEState *s = MACIO_IDE(dev); 422 423 ide_bus_init_output_irq(&s->bus, s->ide_irq); 424 425 /* Register DMA callbacks */ 426 s->dma.ops = &dbdma_ops; 427 s->bus.dma = &s->dma; 428 } 429 430 static void pmac_ide_irq(void *opaque, int n, int level) 431 { 432 MACIOIDEState *s = opaque; 433 uint32_t mask = 0x80000000u >> n; 434 435 /* We need to reflect the IRQ state in the irq register */ 436 if (level) { 437 s->irq_reg |= mask; 438 } else { 439 s->irq_reg &= ~mask; 440 } 441 442 if (n) { 443 qemu_set_irq(s->real_ide_irq, level); 444 } else { 445 qemu_set_irq(s->real_dma_irq, level); 446 } 447 } 448 449 static void macio_ide_initfn(Object *obj) 450 { 451 SysBusDevice *d = SYS_BUS_DEVICE(obj); 452 MACIOIDEState *s = MACIO_IDE(obj); 453 454 ide_bus_init(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2); 455 memory_region_init_io(&s->mem, obj, &pmac_ide_ops, s, "pmac-ide", 0x1000); 456 sysbus_init_mmio(d, &s->mem); 457 sysbus_init_irq(d, &s->real_ide_irq); 458 sysbus_init_irq(d, &s->real_dma_irq); 459 s->dma_irq = qemu_allocate_irq(pmac_ide_irq, s, 0); 460 s->ide_irq = qemu_allocate_irq(pmac_ide_irq, s, 1); 461 462 object_property_add_link(obj, "dbdma", TYPE_MAC_DBDMA, 463 (Object **) &s->dbdma, 464 qdev_prop_allow_set_link_before_realize, 0); 465 } 466 467 static Property macio_ide_properties[] = { 468 DEFINE_PROP_UINT32("channel", MACIOIDEState, channel, 0), 469 DEFINE_PROP_UINT32("addr", MACIOIDEState, addr, -1), 470 DEFINE_PROP_END_OF_LIST(), 471 }; 472 473 static void macio_ide_class_init(ObjectClass *oc, void *data) 474 { 475 DeviceClass *dc = DEVICE_CLASS(oc); 476 477 dc->realize = macio_ide_realizefn; 478 dc->reset = macio_ide_reset; 479 device_class_set_props(dc, macio_ide_properties); 480 dc->vmsd = &vmstate_pmac; 481 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 482 } 483 484 static const TypeInfo macio_ide_type_info = { 485 .name = TYPE_MACIO_IDE, 486 .parent = TYPE_SYS_BUS_DEVICE, 487 .instance_size = sizeof(MACIOIDEState), 488 .instance_init = macio_ide_initfn, 489 .class_init = macio_ide_class_init, 490 }; 491 492 static void macio_ide_register_types(void) 493 { 494 type_register_static(&macio_ide_type_info); 495 } 496 497 /* hd_table must contain 2 block drivers */ 498 void macio_ide_init_drives(MACIOIDEState *s, DriveInfo **hd_table) 499 { 500 int i; 501 502 for (i = 0; i < 2; i++) { 503 if (hd_table[i]) { 504 ide_bus_create_drive(&s->bus, i, hd_table[i]); 505 } 506 } 507 } 508 509 void macio_ide_register_dma(MACIOIDEState *s) 510 { 511 DBDMA_register_channel(s->dbdma, s->channel, s->dma_irq, 512 pmac_ide_transfer, pmac_ide_flush, s); 513 } 514 515 type_init(macio_ide_register_types) 516