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qemu/hw/ide/macio.c

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/*
* QEMU IDE Emulation: MacIO support.
*
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2006 Openedhand Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw/hw.h"
#include "hw/ppc/mac.h"
#include "hw/ppc/mac_dbdma.h"
#include "sysemu/block-backend.h"
#include "sysemu/dma.h"
#include <hw/ide/internal.h>
/* debug MACIO */
// #define DEBUG_MACIO
#ifdef DEBUG_MACIO
static const int debug_macio = 1;
#else
static const int debug_macio = 0;
#endif
#define MACIO_DPRINTF(fmt, ...) do { \
if (debug_macio) { \
printf(fmt , ## __VA_ARGS__); \
} \
} while (0)
/***********************************************************/
/* MacIO based PowerPC IDE */
#define MACIO_PAGE_SIZE 4096
static void pmac_dma_read(BlockBackend *blk,
int64_t sector_num, int nb_sectors,
void (*cb)(void *opaque, int ret), void *opaque)
{
DBDMA_io *io = opaque;
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
dma_addr_t dma_addr, dma_len;
void *mem;
int nsector, remainder;
qemu_iovec_destroy(&io->iov);
qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
if (io->remainder_len > 0) {
/* Return remainder of request */
int transfer = MIN(io->remainder_len, io->len);
MACIO_DPRINTF("--- DMA read pop - bounce addr: %p addr: %"
HWADDR_PRIx " remainder_len: %x\n",
&io->remainder + (0x200 - transfer), io->addr,
io->remainder_len);
cpu_physical_memory_write(io->addr,
&io->remainder + (0x200 - transfer),
transfer);
io->remainder_len -= transfer;
io->len -= transfer;
io->addr += transfer;
s->io_buffer_index += transfer;
s->io_buffer_size -= transfer;
if (io->remainder_len != 0) {
/* Still waiting for remainder */
return;
}
if (io->len == 0) {
MACIO_DPRINTF("--- finished all read processing; go and finish\n");
cb(opaque, 0);
return;
}
}
if (s->drive_kind == IDE_CD) {
sector_num = (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9);
} else {
sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
}
nsector = ((io->len + 0x1ff) >> 9);
remainder = (nsector << 9) - io->len;
MACIO_DPRINTF("--- DMA read transfer - addr: %" HWADDR_PRIx " len: %x\n",
io->addr, io->len);
dma_addr = io->addr;
dma_len = io->len;
mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
DMA_DIRECTION_FROM_DEVICE);
if (!remainder) {
MACIO_DPRINTF("--- DMA read aligned - addr: %" HWADDR_PRIx
" len: %x\n", io->addr, io->len);
qemu_iovec_add(&io->iov, mem, io->len);
} else {
MACIO_DPRINTF("--- DMA read unaligned - addr: %" HWADDR_PRIx
" len: %x\n", io->addr, io->len);
qemu_iovec_add(&io->iov, mem, io->len);
MACIO_DPRINTF("--- DMA read push - bounce addr: %p "
"remainder_len: %x\n",
&io->remainder + 0x200 - remainder, remainder);
qemu_iovec_add(&io->iov, &io->remainder + 0x200 - remainder,
remainder);
io->remainder_len = remainder;
}
s->io_buffer_size -= io->len;
s->io_buffer_index += io->len;
io->len = 0;
MACIO_DPRINTF("--- Block read transfer - sector_num: %"PRIx64" "
"nsector: %x\n",
sector_num, nsector);
m->aiocb = blk_aio_readv(blk, sector_num, &io->iov, nsector, cb, io);
}
static void pmac_dma_write(BlockBackend *blk,
int64_t sector_num, int nb_sectors,
void (*cb)(void *opaque, int ret), void *opaque)
{
DBDMA_io *io = opaque;
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
dma_addr_t dma_addr, dma_len;
void *mem;
int nsector, remainder;
int extra = 0;
qemu_iovec_destroy(&io->iov);
qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
if (io->remainder_len > 0) {
/* Return remainder of request */
int transfer = MIN(io->remainder_len, io->len);
MACIO_DPRINTF("--- processing write remainder %x\n", transfer);
cpu_physical_memory_read(io->addr,
&io->remainder + (0x200 - transfer),
transfer);
io->remainder_len -= transfer;
io->len -= transfer;
io->addr += transfer;
s->io_buffer_index += transfer;
s->io_buffer_size -= transfer;
if (io->remainder_len != 0) {
/* Still waiting for remainder */
return;
}
MACIO_DPRINTF("--> prepending bounce buffer with size 0x200\n");
/* Sector transfer complete - prepend to request */
qemu_iovec_add(&io->iov, &io->remainder, 0x200);
extra = 1;
}
if (s->drive_kind == IDE_CD) {
sector_num = (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9);
} else {
sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
}
nsector = (io->len >> 9);
remainder = io->len - (nsector << 9);
MACIO_DPRINTF("--- DMA write transfer - addr: %" HWADDR_PRIx " len: %x\n",
io->addr, io->len);
MACIO_DPRINTF("xxx remainder: %x\n", remainder);
MACIO_DPRINTF("xxx sector_num: %"PRIx64" nsector: %x\n",
sector_num, nsector);
dma_addr = io->addr;
dma_len = io->len;
mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len,
DMA_DIRECTION_TO_DEVICE);
if (!remainder) {
MACIO_DPRINTF("--- DMA write aligned - addr: %" HWADDR_PRIx
" len: %x\n", io->addr, io->len);
qemu_iovec_add(&io->iov, mem, io->len);
} else {
/* Write up to last complete sector */
MACIO_DPRINTF("--- DMA write unaligned - addr: %" HWADDR_PRIx
" len: %x\n", io->addr, (nsector << 9));
qemu_iovec_add(&io->iov, mem, (nsector << 9));
MACIO_DPRINTF("--- DMA write read - bounce addr: %p "
"remainder_len: %x\n", &io->remainder, remainder);
cpu_physical_memory_read(io->addr + (nsector << 9), &io->remainder,
remainder);
io->remainder_len = 0x200 - remainder;
MACIO_DPRINTF("xxx remainder_len: %x\n", io->remainder_len);
}
s->io_buffer_size -= ((nsector + extra) << 9);
s->io_buffer_index += ((nsector + extra) << 9);
io->len = 0;
MACIO_DPRINTF("--- Block write transfer - sector_num: %"PRIx64" "
"nsector: %x\n", sector_num, nsector + extra);
m->aiocb = blk_aio_writev(blk, sector_num, &io->iov, nsector + extra, cb,
io);
}
static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
{
DBDMA_io *io = opaque;
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
int64_t sector_num;
int nsector, remainder;
MACIO_DPRINTF("\ns is %p\n", s);
MACIO_DPRINTF("io_buffer_index: %x\n", s->io_buffer_index);
MACIO_DPRINTF("io_buffer_size: %x packet_transfer_size: %x\n",
s->io_buffer_size, s->packet_transfer_size);
MACIO_DPRINTF("lba: %x\n", s->lba);
MACIO_DPRINTF("io_addr: %" HWADDR_PRIx " io_len: %x\n", io->addr,
io->len);
if (ret < 0) {
MACIO_DPRINTF("THERE WAS AN ERROR! %d\n", ret);
ide_atapi_io_error(s, ret);
goto done;
}
if (!m->dma_active) {
MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
s->nsector, io->len, s->status);
/* data not ready yet, wait for the channel to get restarted */
io->processing = false;
return;
}
if (s->io_buffer_size <= 0) {
ide_atapi_cmd_ok(s);
m->dma_active = false;
goto done;
}
if (io->len == 0) {
MACIO_DPRINTF("End of DMA transfer\n");
goto done;
}
if (s->lba == -1) {
/* Non-block ATAPI transfer - just copy to RAM */
s->io_buffer_size = MIN(s->io_buffer_size, io->len);
cpu_physical_memory_write(io->addr, s->io_buffer, s->io_buffer_size);
ide_atapi_cmd_ok(s);
m->dma_active = false;
goto done;
}
/* Calculate number of sectors */
sector_num = (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9);
nsector = (io->len + 0x1ff) >> 9;
remainder = io->len & 0x1ff;
MACIO_DPRINTF("nsector: %d remainder: %x\n", nsector, remainder);
MACIO_DPRINTF("sector: %"PRIx64" %zx\n", sector_num, io->iov.size / 512);
pmac_dma_read(s->blk, sector_num, nsector, pmac_ide_atapi_transfer_cb, io);
return;
done:
MACIO_DPRINTF("done DMA\n\n");
block_acct_done(blk_get_stats(s->blk), &s->acct);
io->dma_end(opaque);
return;
}
static void pmac_ide_transfer_cb(void *opaque, int ret)
{
DBDMA_io *io = opaque;
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
int64_t sector_num;
int nsector, remainder;
MACIO_DPRINTF("pmac_ide_transfer_cb\n");
if (ret < 0) {
MACIO_DPRINTF("DMA error\n");
m->aiocb = NULL;
ide_dma_error(s);
io->remainder_len = 0;
goto done;
}
if (!m->dma_active) {
MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
s->nsector, io->len, s->status);
/* data not ready yet, wait for the channel to get restarted */
io->processing = false;
return;
}
if (s->io_buffer_size <= 0) {
MACIO_DPRINTF("end of transfer\n");
s->status = READY_STAT | SEEK_STAT;
ide_set_irq(s->bus);
m->dma_active = false;
goto done;
}
if (io->len == 0) {
MACIO_DPRINTF("End of DMA transfer\n");
goto done;
}
/* Calculate number of sectors */
sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
nsector = (io->len + 0x1ff) >> 9;
remainder = io->len & 0x1ff;
s->nsector -= nsector;
MACIO_DPRINTF("nsector: %d remainder: %x\n", nsector, remainder);
MACIO_DPRINTF("sector: %"PRIx64" %x\n", sector_num, nsector);
switch (s->dma_cmd) {
case IDE_DMA_READ:
pmac_dma_read(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_WRITE:
pmac_dma_write(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_TRIM:
MACIO_DPRINTF("TRIM command issued!");
break;
}
return;
done:
if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) {
block_acct_done(blk_get_stats(s->blk), &s->acct);
}
io->dma_end(opaque);
}
static void pmac_ide_transfer(DBDMA_io *io)
{
MACIOIDEState *m = io->opaque;
IDEState *s = idebus_active_if(&m->bus);
MACIO_DPRINTF("\n");
if (s->drive_kind == IDE_CD) {
block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
BLOCK_ACCT_READ);
pmac_ide_atapi_transfer_cb(io, 0);
return;
}
switch (s->dma_cmd) {
case IDE_DMA_READ:
block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
BLOCK_ACCT_READ);
break;
case IDE_DMA_WRITE:
block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
BLOCK_ACCT_WRITE);
break;
default:
break;
}
pmac_ide_transfer_cb(io, 0);
}
static void pmac_ide_flush(DBDMA_io *io)
{
MACIOIDEState *m = io->opaque;
if (m->aiocb) {
blk_drain_all();
}
}
/* PowerMac IDE memory IO */
static void pmac_ide_writeb (void *opaque,
hwaddr addr, uint32_t val)
{
MACIOIDEState *d = opaque;
addr = (addr & 0xFFF) >> 4;
switch (addr) {
case 1 ... 7:
ide_ioport_write(&d->bus, addr, val);
break;
case 8:
case 22:
ide_cmd_write(&d->bus, 0, val);
break;
default:
break;
}
}
static uint32_t pmac_ide_readb (void *opaque,hwaddr addr)
{
uint8_t retval;
MACIOIDEState *d = opaque;
addr = (addr & 0xFFF) >> 4;
switch (addr) {
case 1 ... 7:
retval = ide_ioport_read(&d->bus, addr);
break;
case 8:
case 22:
retval = ide_status_read(&d->bus, 0);
break;
default:
retval = 0xFF;
break;
}
return retval;
}
static void pmac_ide_writew (void *opaque,
hwaddr addr, uint32_t val)
{
MACIOIDEState *d = opaque;
addr = (addr & 0xFFF) >> 4;
val = bswap16(val);
if (addr == 0) {
ide_data_writew(&d->bus, 0, val);
}
}
static uint32_t pmac_ide_readw (void *opaque,hwaddr addr)
{
uint16_t retval;
MACIOIDEState *d = opaque;
addr = (addr & 0xFFF) >> 4;
if (addr == 0) {
retval = ide_data_readw(&d->bus, 0);
} else {
retval = 0xFFFF;
}
retval = bswap16(retval);
return retval;
}
static void pmac_ide_writel (void *opaque,
hwaddr addr, uint32_t val)
{
MACIOIDEState *d = opaque;
addr = (addr & 0xFFF) >> 4;
val = bswap32(val);
if (addr == 0) {
ide_data_writel(&d->bus, 0, val);
}
}
static uint32_t pmac_ide_readl (void *opaque,hwaddr addr)
{
uint32_t retval;
MACIOIDEState *d = opaque;
addr = (addr & 0xFFF) >> 4;
if (addr == 0) {
retval = ide_data_readl(&d->bus, 0);
} else {
retval = 0xFFFFFFFF;
}
retval = bswap32(retval);
return retval;
}
static const MemoryRegionOps pmac_ide_ops = {
.old_mmio = {
.write = {
pmac_ide_writeb,
pmac_ide_writew,
pmac_ide_writel,
},
.read = {
pmac_ide_readb,
pmac_ide_readw,
pmac_ide_readl,
},
},
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_pmac = {
.name = "ide",
.version_id = 3,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_IDE_BUS(bus, MACIOIDEState),
VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
VMSTATE_END_OF_LIST()
}
};
static void macio_ide_reset(DeviceState *dev)
{
MACIOIDEState *d = MACIO_IDE(dev);
ide_bus_reset(&d->bus);
}
static int ide_nop_int(IDEDMA *dma, int x)
{
return 0;
}
static int32_t ide_nop_int32(IDEDMA *dma, int x)
{
return 0;
}
static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
BlockCompletionFunc *cb)
{
MACIOIDEState *m = container_of(dma, MACIOIDEState, dma);
DBDMAState *dbdma = m->dbdma;
DBDMA_io *io;
int i;
s->io_buffer_index = 0;
if (s->drive_kind == IDE_CD) {
s->io_buffer_size = s->packet_transfer_size;
} else {
s->io_buffer_size = s->nsector * 0x200;
}
MACIO_DPRINTF("\n\n------------ IDE transfer\n");
MACIO_DPRINTF("buffer_size: %x buffer_index: %x\n",
s->io_buffer_size, s->io_buffer_index);
MACIO_DPRINTF("lba: %x size: %x\n", s->lba, s->io_buffer_size);
MACIO_DPRINTF("-------------------------\n");
for (i = 0; i < DBDMA_CHANNELS; i++) {
io = &dbdma->channels[i].io;
if (io->opaque == m) {
io->remainder_len = 0;
}
}
MACIO_DPRINTF("\n");
m->dma_active = true;
DBDMA_kick(m->dbdma);
}
static const IDEDMAOps dbdma_ops = {
.start_dma = ide_dbdma_start,
.prepare_buf = ide_nop_int32,
.rw_buf = ide_nop_int,
};
static void macio_ide_realizefn(DeviceState *dev, Error **errp)
{
MACIOIDEState *s = MACIO_IDE(dev);
ide_init2(&s->bus, s->irq);
/* Register DMA callbacks */
s->dma.ops = &dbdma_ops;
s->bus.dma = &s->dma;
}
static void macio_ide_initfn(Object *obj)
{
SysBusDevice *d = SYS_BUS_DEVICE(obj);
MACIOIDEState *s = MACIO_IDE(obj);
ide_bus_new(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2);
memory_region_init_io(&s->mem, obj, &pmac_ide_ops, s, "pmac-ide", 0x1000);
sysbus_init_mmio(d, &s->mem);
sysbus_init_irq(d, &s->irq);
sysbus_init_irq(d, &s->dma_irq);
}
static void macio_ide_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = macio_ide_realizefn;
dc->reset = macio_ide_reset;
dc->vmsd = &vmstate_pmac;
}
static const TypeInfo macio_ide_type_info = {
.name = TYPE_MACIO_IDE,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MACIOIDEState),
.instance_init = macio_ide_initfn,
.class_init = macio_ide_class_init,
};
static void macio_ide_register_types(void)
{
type_register_static(&macio_ide_type_info);
}
/* hd_table must contain 2 block drivers */
void macio_ide_init_drives(MACIOIDEState *s, DriveInfo **hd_table)
{
int i;
for (i = 0; i < 2; i++) {
if (hd_table[i]) {
ide_create_drive(&s->bus, i, hd_table[i]);
}
}
}
void macio_ide_register_dma(MACIOIDEState *s, void *dbdma, int channel)
{
s->dbdma = dbdma;
DBDMA_register_channel(dbdma, channel, s->dma_irq,
pmac_ide_transfer, pmac_ide_flush, s);
}
type_init(macio_ide_register_types)
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