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
26 #include "hw/ppc/mac.h"
27 #include "hw/ppc/mac_dbdma.h"
28 #include "sysemu/block-backend.h"
29 #include "sysemu/dma.h"
31 #include <hw/ide/internal.h>
34 // #define DEBUG_MACIO
37 static const int debug_macio = 1;
39 static const int debug_macio = 0;
42 #define MACIO_DPRINTF(fmt, ...) do { \
44 printf(fmt , ## __VA_ARGS__); \
49 /***********************************************************/
50 /* MacIO based PowerPC IDE */
52 #define MACIO_PAGE_SIZE 4096
55 * Unaligned DMA read/write access functions required for OS X/Darwin which
56 * don't perform DMA transactions on sector boundaries. These functions are
57 * modelled on bdrv_co_do_preadv()/bdrv_co_do_pwritev() and so should be
58 * easy to remove if the unaligned block APIs are ever exposed.
61 static void pmac_dma_read(BlockBackend *blk,
62 int64_t offset, unsigned int bytes,
63 void (*cb)(void *opaque, int ret), void *opaque)
65 DBDMA_io *io = opaque;
66 MACIOIDEState *m = io->opaque;
67 IDEState *s = idebus_active_if(&m->bus);
68 dma_addr_t dma_addr, dma_len;
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,
87 mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
88 DMA_DIRECTION_FROM_DEVICE);
90 if (offset & (align - 1)) {
91 head_bytes = offset & (align - 1);
93 MACIO_DPRINTF("--- DMA unaligned head: sector %" PRId64 ", "
94 "discarding %zu bytes\n", sector_num, head_bytes);
96 qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
98 bytes += offset & (align - 1);
99 offset = offset & ~(align - 1);
102 qemu_iovec_add(&io->iov, mem, io->len);
104 if ((offset + bytes) & (align - 1)) {
105 tail_bytes = (offset + bytes) & (align - 1);
107 MACIO_DPRINTF("--- DMA unaligned tail: sector %" PRId64 ", "
108 "discarding bytes %zu\n", sector_num, tail_bytes);
110 qemu_iovec_add(&io->iov, &io->tail_remainder, align - tail_bytes);
111 bytes = ROUND_UP(bytes, align);
114 s->io_buffer_size -= io->len;
115 s->io_buffer_index += io->len;
119 MACIO_DPRINTF("--- Block read transfer - sector_num: %" PRIx64 " "
120 "nsector: %x\n", (offset >> 9), (bytes >> 9));
122 m->aiocb = blk_aio_readv(blk, (offset >> 9), &io->iov, (bytes >> 9),
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);
133 dma_addr_t dma_addr, dma_len;
137 uint64_t align = BDRV_SECTOR_SIZE;
138 size_t head_bytes, tail_bytes;
139 bool unaligned_head = false, unaligned_tail = false;
141 qemu_iovec_destroy(&io->iov);
142 qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
144 sector_num = (offset >> 9);
145 nsector = (io->len >> 9);
147 MACIO_DPRINTF("--- DMA write transfer (0x%" HWADDR_PRIx ",0x%x): "
148 "sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
149 sector_num, nsector);
153 mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
154 DMA_DIRECTION_TO_DEVICE);
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, 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, 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, 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 m->aiocb = blk_aio_writev(blk, (offset >> 9), &io->iov, (bytes >> 9),
211 static void pmac_dma_trim(BlockBackend *blk,
212 int64_t offset, int bytes,
213 void (*cb)(void *opaque, int ret), void *opaque)
215 DBDMA_io *io = opaque;
216 MACIOIDEState *m = io->opaque;
217 IDEState *s = idebus_active_if(&m->bus);
218 dma_addr_t dma_addr, dma_len;
221 qemu_iovec_destroy(&io->iov);
222 qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
226 mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
227 DMA_DIRECTION_TO_DEVICE);
229 qemu_iovec_add(&io->iov, mem, io->len);
230 s->io_buffer_size -= io->len;
231 s->io_buffer_index += io->len;
234 m->aiocb = ide_issue_trim(blk, (offset >> 9), &io->iov, (bytes >> 9),
238 static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
240 DBDMA_io *io = opaque;
241 MACIOIDEState *m = io->opaque;
242 IDEState *s = idebus_active_if(&m->bus);
245 MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n");
248 MACIO_DPRINTF("DMA error: %d\n", ret);
249 ide_atapi_io_error(s, ret);
253 if (!m->dma_active) {
254 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
255 s->nsector, io->len, s->status);
256 /* data not ready yet, wait for the channel to get restarted */
257 io->processing = false;
261 if (s->io_buffer_size <= 0) {
262 MACIO_DPRINTF("End of IDE transfer\n");
264 m->dma_active = false;
269 MACIO_DPRINTF("End of DMA transfer\n");
274 /* Non-block ATAPI transfer - just copy to RAM */
275 s->io_buffer_size = MIN(s->io_buffer_size, io->len);
276 cpu_physical_memory_write(io->addr, s->io_buffer, s->io_buffer_size);
278 m->dma_active = false;
282 /* Calculate current offset */
283 offset = (int64_t)(s->lba << 11) + s->io_buffer_index;
285 pmac_dma_read(s->blk, offset, io->len, pmac_ide_atapi_transfer_cb, io);
289 block_acct_done(blk_get_stats(s->blk), &s->acct);
295 static void pmac_ide_transfer_cb(void *opaque, int ret)
297 DBDMA_io *io = opaque;
298 MACIOIDEState *m = io->opaque;
299 IDEState *s = idebus_active_if(&m->bus);
302 MACIO_DPRINTF("pmac_ide_transfer_cb\n");
305 MACIO_DPRINTF("DMA error: %d\n", ret);
311 if (!m->dma_active) {
312 MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
313 s->nsector, io->len, s->status);
314 /* data not ready yet, wait for the channel to get restarted */
315 io->processing = false;
319 if (s->io_buffer_size <= 0) {
320 MACIO_DPRINTF("End of IDE transfer\n");
321 s->status = READY_STAT | SEEK_STAT;
323 m->dma_active = false;
328 MACIO_DPRINTF("End of DMA transfer\n");
332 /* Calculate number of sectors */
333 offset = (ide_get_sector(s) << 9) + s->io_buffer_index;
335 switch (s->dma_cmd) {
337 pmac_dma_read(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
340 pmac_dma_write(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
343 pmac_dma_trim(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
350 if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) {
351 block_acct_done(blk_get_stats(s->blk), &s->acct);
356 static void pmac_ide_transfer(DBDMA_io *io)
358 MACIOIDEState *m = io->opaque;
359 IDEState *s = idebus_active_if(&m->bus);
363 if (s->drive_kind == IDE_CD) {
364 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
367 pmac_ide_atapi_transfer_cb(io, 0);
371 switch (s->dma_cmd) {
373 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
377 block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
384 pmac_ide_transfer_cb(io, 0);
387 static void pmac_ide_flush(DBDMA_io *io)
389 MACIOIDEState *m = io->opaque;
396 /* PowerMac IDE memory IO */
397 static void pmac_ide_writeb (void *opaque,
398 hwaddr addr, uint32_t val)
400 MACIOIDEState *d = opaque;
402 addr = (addr & 0xFFF) >> 4;
405 ide_ioport_write(&d->bus, addr, val);
409 ide_cmd_write(&d->bus, 0, val);
416 static uint32_t pmac_ide_readb (void *opaque,hwaddr addr)
419 MACIOIDEState *d = opaque;
421 addr = (addr & 0xFFF) >> 4;
424 retval = ide_ioport_read(&d->bus, addr);
428 retval = ide_status_read(&d->bus, 0);
437 static void pmac_ide_writew (void *opaque,
438 hwaddr addr, uint32_t val)
440 MACIOIDEState *d = opaque;
442 addr = (addr & 0xFFF) >> 4;
445 ide_data_writew(&d->bus, 0, val);
449 static uint32_t pmac_ide_readw (void *opaque,hwaddr addr)
452 MACIOIDEState *d = opaque;
454 addr = (addr & 0xFFF) >> 4;
456 retval = ide_data_readw(&d->bus, 0);
460 retval = bswap16(retval);
464 static void pmac_ide_writel (void *opaque,
465 hwaddr addr, uint32_t val)
467 MACIOIDEState *d = opaque;
469 addr = (addr & 0xFFF) >> 4;
472 ide_data_writel(&d->bus, 0, val);
476 static uint32_t pmac_ide_readl (void *opaque,hwaddr addr)
479 MACIOIDEState *d = opaque;
481 addr = (addr & 0xFFF) >> 4;
483 retval = ide_data_readl(&d->bus, 0);
487 retval = bswap32(retval);
491 static const MemoryRegionOps pmac_ide_ops = {
504 .endianness = DEVICE_NATIVE_ENDIAN,
507 static const VMStateDescription vmstate_pmac = {
510 .minimum_version_id = 0,
511 .fields = (VMStateField[]) {
512 VMSTATE_IDE_BUS(bus, MACIOIDEState),
513 VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
514 VMSTATE_END_OF_LIST()
518 static void macio_ide_reset(DeviceState *dev)
520 MACIOIDEState *d = MACIO_IDE(dev);
522 ide_bus_reset(&d->bus);
525 static int ide_nop_int(IDEDMA *dma, int x)
530 static int32_t ide_nop_int32(IDEDMA *dma, int32_t l)
535 static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
536 BlockCompletionFunc *cb)
538 MACIOIDEState *m = container_of(dma, MACIOIDEState, dma);
540 s->io_buffer_index = 0;
541 if (s->drive_kind == IDE_CD) {
542 s->io_buffer_size = s->packet_transfer_size;
544 s->io_buffer_size = s->nsector * BDRV_SECTOR_SIZE;
547 MACIO_DPRINTF("\n\n------------ IDE transfer\n");
548 MACIO_DPRINTF("buffer_size: %x buffer_index: %x\n",
549 s->io_buffer_size, s->io_buffer_index);
550 MACIO_DPRINTF("lba: %x size: %x\n", s->lba, s->io_buffer_size);
551 MACIO_DPRINTF("-------------------------\n");
553 m->dma_active = true;
554 DBDMA_kick(m->dbdma);
557 static const IDEDMAOps dbdma_ops = {
558 .start_dma = ide_dbdma_start,
559 .prepare_buf = ide_nop_int32,
560 .rw_buf = ide_nop_int,
563 static void macio_ide_realizefn(DeviceState *dev, Error **errp)
565 MACIOIDEState *s = MACIO_IDE(dev);
567 ide_init2(&s->bus, s->irq);
569 /* Register DMA callbacks */
570 s->dma.ops = &dbdma_ops;
571 s->bus.dma = &s->dma;
574 static void macio_ide_initfn(Object *obj)
576 SysBusDevice *d = SYS_BUS_DEVICE(obj);
577 MACIOIDEState *s = MACIO_IDE(obj);
579 ide_bus_new(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2);
580 memory_region_init_io(&s->mem, obj, &pmac_ide_ops, s, "pmac-ide", 0x1000);
581 sysbus_init_mmio(d, &s->mem);
582 sysbus_init_irq(d, &s->irq);
583 sysbus_init_irq(d, &s->dma_irq);
586 static void macio_ide_class_init(ObjectClass *oc, void *data)
588 DeviceClass *dc = DEVICE_CLASS(oc);
590 dc->realize = macio_ide_realizefn;
591 dc->reset = macio_ide_reset;
592 dc->vmsd = &vmstate_pmac;
593 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
596 static const TypeInfo macio_ide_type_info = {
597 .name = TYPE_MACIO_IDE,
598 .parent = TYPE_SYS_BUS_DEVICE,
599 .instance_size = sizeof(MACIOIDEState),
600 .instance_init = macio_ide_initfn,
601 .class_init = macio_ide_class_init,
604 static void macio_ide_register_types(void)
606 type_register_static(&macio_ide_type_info);
609 /* hd_table must contain 2 block drivers */
610 void macio_ide_init_drives(MACIOIDEState *s, DriveInfo **hd_table)
614 for (i = 0; i < 2; i++) {
616 ide_create_drive(&s->bus, i, hd_table[i]);
621 void macio_ide_register_dma(MACIOIDEState *s, void *dbdma, int channel)
624 DBDMA_register_channel(dbdma, channel, s->dma_irq,
625 pmac_ide_transfer, pmac_ide_flush, s);
628 type_init(macio_ide_register_types)