2 * QEMU IDE Emulation: MacIO support.
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2006 Openedhand Ltd.
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:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
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
25 #include "qemu/osdep.h"
27 #include "hw/ppc/mac.h"
28 #include "hw/ppc/mac_dbdma.h"
29 #include "sysemu/block-backend.h"
30 #include "sysemu/dma.h"
32 #include "hw/ide/internal.h"
35 // #define DEBUG_MACIO
38 static const int debug_macio = 1;
40 static const int debug_macio = 0;
43 #define MACIO_DPRINTF(fmt, ...) do { \
45 printf(fmt , ## __VA_ARGS__); \
50 /***********************************************************/
51 /* MacIO based PowerPC IDE */
53 #define MACIO_PAGE_SIZE 4096
56 * Unaligned DMA read/write access functions required for OS X/Darwin which
57 * don't perform DMA transactions on sector boundaries. These functions are
58 * modelled on bdrv_co_preadv()/bdrv_co_pwritev() and so should be easy to
59 * remove if the unaligned block APIs are ever exposed.
62 static void pmac_dma_read(BlockBackend *blk,
63 int64_t offset, unsigned int bytes,
64 void (*cb)(void *opaque, int ret), void *opaque)
66 DBDMA_io *io = opaque;
67 MACIOIDEState *m = io->opaque;
68 IDEState *s = idebus_active_if(&m->bus);
72 uint64_t align = BDRV_SECTOR_SIZE;
73 size_t head_bytes, tail_bytes;
75 qemu_iovec_destroy(&io->iov);
76 qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
78 sector_num = (offset >> 9);
79 nsector = (io->len >> 9);
81 MACIO_DPRINTF("--- DMA read transfer (0x%" HWADDR_PRIx ",0x%x): "
82 "sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
86 io->dir = DMA_DIRECTION_FROM_DEVICE;
87 io->dma_len = io->len;
88 io->dma_mem = dma_memory_map(&address_space_memory, dma_addr, &io->dma_len,
91 if (offset & (align - 1)) {
92 head_bytes = offset & (align - 1);
94 MACIO_DPRINTF("--- DMA unaligned head: sector %" PRId64 ", "
95 "discarding %zu bytes\n", sector_num, head_bytes);
97 qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
99 bytes += offset & (align - 1);
100 offset = offset & ~(align - 1);
103 qemu_iovec_add(&io->iov, io->dma_mem, io->len);
105 if ((offset + bytes) & (align - 1)) {
106 tail_bytes = (offset + bytes) & (align - 1);
108 MACIO_DPRINTF("--- DMA unaligned tail: sector %" PRId64 ", "
109 "discarding bytes %zu\n", sector_num, tail_bytes);
111 qemu_iovec_add(&io->iov, &io->tail_remainder, align - tail_bytes);
112 bytes = ROUND_UP(bytes, align);
115 s->io_buffer_size -= io->len;
116 s->io_buffer_index += io->len;
120 MACIO_DPRINTF("--- Block read transfer - sector_num: %" PRIx64 " "
121 "nsector: %x\n", (offset >> 9), (bytes >> 9));
123 s->bus->dma->aiocb = blk_aio_preadv(blk, offset, &io->iov, 0, cb, io);
126 static void pmac_dma_write(BlockBackend *blk,
127 int64_t offset, int bytes,
128 void (*cb)(void *opaque, int ret), void *opaque)
130 DBDMA_io *io = opaque;
131 MACIOIDEState *m = io->opaque;
132 IDEState *s = idebus_active_if(&m->bus);
136 uint64_t align = BDRV_SECTOR_SIZE;
137 size_t head_bytes, tail_bytes;
138 bool unaligned_head = false, unaligned_tail = false;
140 qemu_iovec_destroy(&io->iov);
141 qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
143 sector_num = (offset >> 9);
144 nsector = (io->len >> 9);
146 MACIO_DPRINTF("--- DMA write transfer (0x%" HWADDR_PRIx ",0x%x): "
147 "sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
148 sector_num, nsector);
151 io->dir = DMA_DIRECTION_TO_DEVICE;
152 io->dma_len = io->len;
153 io->dma_mem = dma_memory_map(&address_space_memory, dma_addr, &io->dma_len,
156 if (offset & (align - 1)) {
157 head_bytes = offset & (align - 1);
158 sector_num = ((offset & ~(align - 1)) >> 9);
160 MACIO_DPRINTF("--- DMA unaligned head: pre-reading head sector %"
161 PRId64 "\n", sector_num);
163 blk_pread(s->blk, (sector_num << 9), &io->head_remainder, align);
165 qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
166 qemu_iovec_add(&io->iov, io->dma_mem, io->len);
168 bytes += offset & (align - 1);
169 offset = offset & ~(align - 1);
171 unaligned_head = true;
174 if ((offset + bytes) & (align - 1)) {
175 tail_bytes = (offset + bytes) & (align - 1);
176 sector_num = (((offset + bytes) & ~(align - 1)) >> 9);
178 MACIO_DPRINTF("--- DMA unaligned tail: pre-reading tail sector %"
179 PRId64 "\n", sector_num);
181 blk_pread(s->blk, (sector_num << 9), &io->tail_remainder, align);
183 if (!unaligned_head) {
184 qemu_iovec_add(&io->iov, io->dma_mem, io->len);
187 qemu_iovec_add(&io->iov, &io->tail_remainder + tail_bytes,
190 bytes = ROUND_UP(bytes, align);
192 unaligned_tail = true;
195 if (!unaligned_head && !unaligned_tail) {
196 qemu_iovec_add(&io->iov, io->dma_mem, io->len);
199 s->io_buffer_size -= io->len;
200 s->io_buffer_index += io->len;
204 MACIO_DPRINTF("--- Block write transfer - sector_num: %" PRIx64 " "
205 "nsector: %x\n", (offset >> 9), (bytes >> 9));
207 s->bus->dma->aiocb = blk_aio_pwritev(blk, offset, &io->iov, 0, cb, io);
210 static void pmac_dma_trim(BlockBackend *blk,
211 int64_t offset, int bytes,
212 void (*cb)(void *opaque, int ret), void *opaque)
214 DBDMA_io *io = opaque;
215 MACIOIDEState *m = io->opaque;
216 IDEState *s = idebus_active_if(&m->bus);
219 qemu_iovec_destroy(&io->iov);
220 qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
223 io->dir = DMA_DIRECTION_TO_DEVICE;
224 io->dma_len = io->len;
225 io->dma_mem = dma_memory_map(&address_space_memory, dma_addr, &io->dma_len,
228 qemu_iovec_add(&io->iov, io->dma_mem, io->len);
229 s->io_buffer_size -= io->len;
230 s->io_buffer_index += io->len;
233 s->bus->dma->aiocb = ide_issue_trim(offset, &io->iov, cb, io, blk);
236 static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
238 DBDMA_io *io = opaque;
239 MACIOIDEState *m = io->opaque;
240 IDEState *s = idebus_active_if(&m->bus);
243 MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n");
246 MACIO_DPRINTF("DMA error: %d\n", ret);
247 ide_atapi_io_error(s, ret);
251 if (!m->dma_active) {
252 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
253 s->nsector, io->len, s->status);
254 /* data not ready yet, wait for the channel to get restarted */
255 io->processing = false;
259 if (s->io_buffer_size <= 0) {
260 MACIO_DPRINTF("End of IDE transfer\n");
262 m->dma_active = false;
267 MACIO_DPRINTF("End of DMA transfer\n");
272 /* Non-block ATAPI transfer - just copy to RAM */
273 s->io_buffer_size = MIN(s->io_buffer_size, io->len);
274 dma_memory_write(&address_space_memory, io->addr, s->io_buffer,
277 m->dma_active = false;
281 /* Calculate current offset */
282 offset = ((int64_t)s->lba << 11) + s->io_buffer_index;
284 pmac_dma_read(s->blk, offset, io->len, pmac_ide_atapi_transfer_cb, io);
288 dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len,
289 io->dir, io->dma_len);
292 block_acct_failed(blk_get_stats(s->blk), &s->acct);
294 block_acct_done(blk_get_stats(s->blk), &s->acct);
297 ide_set_inactive(s, false);
301 static void pmac_ide_transfer_cb(void *opaque, int ret)
303 DBDMA_io *io = opaque;
304 MACIOIDEState *m = io->opaque;
305 IDEState *s = idebus_active_if(&m->bus);
308 MACIO_DPRINTF("pmac_ide_transfer_cb\n");
311 MACIO_DPRINTF("DMA error: %d\n", ret);
316 if (!m->dma_active) {
317 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
318 s->nsector, io->len, s->status);
319 /* data not ready yet, wait for the channel to get restarted */
320 io->processing = false;
324 if (s->io_buffer_size <= 0) {
325 MACIO_DPRINTF("End of IDE transfer\n");
326 s->status = READY_STAT | SEEK_STAT;
328 m->dma_active = false;
333 MACIO_DPRINTF("End of DMA transfer\n");
337 /* Calculate number of sectors */
338 offset = (ide_get_sector(s) << 9) + s->io_buffer_index;
340 switch (s->dma_cmd) {
342 pmac_dma_read(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
345 pmac_dma_write(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
348 pmac_dma_trim(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
357 dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len,
358 io->dir, io->dma_len);
360 if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) {
362 block_acct_failed(blk_get_stats(s->blk), &s->acct);
364 block_acct_done(blk_get_stats(s->blk), &s->acct);
368 ide_set_inactive(s, false);
372 static void pmac_ide_transfer(DBDMA_io *io)
374 MACIOIDEState *m = io->opaque;
375 IDEState *s = idebus_active_if(&m->bus);
379 if (s->drive_kind == IDE_CD) {
380 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
383 pmac_ide_atapi_transfer_cb(io, 0);
387 switch (s->dma_cmd) {
389 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
393 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
400 pmac_ide_transfer_cb(io, 0);
403 static void pmac_ide_flush(DBDMA_io *io)
405 MACIOIDEState *m = io->opaque;
406 IDEState *s = idebus_active_if(&m->bus);
408 if (s->bus->dma->aiocb) {
413 /* PowerMac IDE memory IO */
414 static void pmac_ide_writeb (void *opaque,
415 hwaddr addr, uint32_t val)
417 MACIOIDEState *d = opaque;
419 addr = (addr & 0xFFF) >> 4;
422 ide_ioport_write(&d->bus, addr, val);
426 ide_cmd_write(&d->bus, 0, val);
433 static uint32_t pmac_ide_readb (void *opaque,hwaddr addr)
436 MACIOIDEState *d = opaque;
438 addr = (addr & 0xFFF) >> 4;
441 retval = ide_ioport_read(&d->bus, addr);
445 retval = ide_status_read(&d->bus, 0);
454 static void pmac_ide_writew (void *opaque,
455 hwaddr addr, uint32_t val)
457 MACIOIDEState *d = opaque;
459 addr = (addr & 0xFFF) >> 4;
462 ide_data_writew(&d->bus, 0, val);
466 static uint32_t pmac_ide_readw (void *opaque,hwaddr addr)
469 MACIOIDEState *d = opaque;
471 addr = (addr & 0xFFF) >> 4;
473 retval = ide_data_readw(&d->bus, 0);
477 retval = bswap16(retval);
481 static void pmac_ide_writel (void *opaque,
482 hwaddr addr, uint32_t val)
484 MACIOIDEState *d = opaque;
486 addr = (addr & 0xFFF) >> 4;
489 ide_data_writel(&d->bus, 0, val);
493 static uint32_t pmac_ide_readl (void *opaque,hwaddr addr)
496 MACIOIDEState *d = opaque;
498 addr = (addr & 0xFFF) >> 4;
500 retval = ide_data_readl(&d->bus, 0);
504 retval = bswap32(retval);
508 static const MemoryRegionOps pmac_ide_ops = {
521 .endianness = DEVICE_NATIVE_ENDIAN,
524 static const VMStateDescription vmstate_pmac = {
527 .minimum_version_id = 0,
528 .fields = (VMStateField[]) {
529 VMSTATE_IDE_BUS(bus, MACIOIDEState),
530 VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
531 VMSTATE_BOOL(dma_active, MACIOIDEState),
532 VMSTATE_END_OF_LIST()
536 static void macio_ide_reset(DeviceState *dev)
538 MACIOIDEState *d = MACIO_IDE(dev);
540 ide_bus_reset(&d->bus);
543 static int ide_nop_int(IDEDMA *dma, int x)
548 static int32_t ide_nop_int32(IDEDMA *dma, int32_t l)
553 static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
554 BlockCompletionFunc *cb)
556 MACIOIDEState *m = container_of(dma, MACIOIDEState, dma);
558 s->io_buffer_index = 0;
559 if (s->drive_kind == IDE_CD) {
560 s->io_buffer_size = s->packet_transfer_size;
562 s->io_buffer_size = s->nsector * BDRV_SECTOR_SIZE;
565 MACIO_DPRINTF("\n\n------------ IDE transfer\n");
566 MACIO_DPRINTF("buffer_size: %x buffer_index: %x\n",
567 s->io_buffer_size, s->io_buffer_index);
568 MACIO_DPRINTF("lba: %x size: %x\n", s->lba, s->io_buffer_size);
569 MACIO_DPRINTF("-------------------------\n");
571 m->dma_active = true;
572 DBDMA_kick(m->dbdma);
575 static const IDEDMAOps dbdma_ops = {
576 .start_dma = ide_dbdma_start,
577 .prepare_buf = ide_nop_int32,
578 .rw_buf = ide_nop_int,
581 static void macio_ide_realizefn(DeviceState *dev, Error **errp)
583 MACIOIDEState *s = MACIO_IDE(dev);
585 ide_init2(&s->bus, s->irq);
587 /* Register DMA callbacks */
588 s->dma.ops = &dbdma_ops;
589 s->bus.dma = &s->dma;
592 static void macio_ide_initfn(Object *obj)
594 SysBusDevice *d = SYS_BUS_DEVICE(obj);
595 MACIOIDEState *s = MACIO_IDE(obj);
597 ide_bus_new(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2);
598 memory_region_init_io(&s->mem, obj, &pmac_ide_ops, s, "pmac-ide", 0x1000);
599 sysbus_init_mmio(d, &s->mem);
600 sysbus_init_irq(d, &s->irq);
601 sysbus_init_irq(d, &s->dma_irq);
604 static void macio_ide_class_init(ObjectClass *oc, void *data)
606 DeviceClass *dc = DEVICE_CLASS(oc);
608 dc->realize = macio_ide_realizefn;
609 dc->reset = macio_ide_reset;
610 dc->vmsd = &vmstate_pmac;
611 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
614 static const TypeInfo macio_ide_type_info = {
615 .name = TYPE_MACIO_IDE,
616 .parent = TYPE_SYS_BUS_DEVICE,
617 .instance_size = sizeof(MACIOIDEState),
618 .instance_init = macio_ide_initfn,
619 .class_init = macio_ide_class_init,
622 static void macio_ide_register_types(void)
624 type_register_static(&macio_ide_type_info);
627 /* hd_table must contain 2 block drivers */
628 void macio_ide_init_drives(MACIOIDEState *s, DriveInfo **hd_table)
632 for (i = 0; i < 2; i++) {
634 ide_create_drive(&s->bus, i, hd_table[i]);
639 void macio_ide_register_dma(MACIOIDEState *s, void *dbdma, int channel)
642 DBDMA_register_channel(dbdma, channel, s->dma_irq,
643 pmac_ide_transfer, pmac_ide_flush, s);
646 type_init(macio_ide_register_types)