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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 "qemu/osdep.h"
#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_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 offset;
MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n");
if (ret < 0) {
MACIO_DPRINTF("DMA error: %d\n", ret);
qemu_sglist_destroy(&s->sg);
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) {
MACIO_DPRINTF("End of IDE transfer\n");
qemu_sglist_destroy(&s->sg);
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);
dma_memory_write(&address_space_memory, io->addr, s->io_buffer,
s->io_buffer_size);
io->len = 0;
ide_atapi_cmd_ok(s);
m->dma_active = false;
goto done;
}
/* Calculate current offset */
offset = ((int64_t)s->lba << 11) + s->io_buffer_index;
qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1,
&address_space_memory);
qemu_sglist_add(&s->sg, io->addr, io->len);
s->io_buffer_size -= io->len;
s->io_buffer_index += io->len;
io->len = 0;
s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, 0x1,
pmac_ide_atapi_transfer_cb, io);
return;
done:
dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len,
io->dir, io->dma_len);
if (ret < 0) {
block_acct_failed(blk_get_stats(s->blk), &s->acct);
} else {
block_acct_done(blk_get_stats(s->blk), &s->acct);
}
ide_set_inactive(s, false);
io->dma_end(opaque);
}
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 offset;
MACIO_DPRINTF("pmac_ide_transfer_cb\n");
if (ret < 0) {
MACIO_DPRINTF("DMA error: %d\n", ret);
qemu_sglist_destroy(&s->sg);
ide_dma_error(s);
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 IDE transfer\n");
qemu_sglist_destroy(&s->sg);
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 */
offset = (ide_get_sector(s) << 9) + s->io_buffer_index;
qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1,
&address_space_memory);
qemu_sglist_add(&s->sg, io->addr, io->len);
s->io_buffer_size -= io->len;
s->io_buffer_index += io->len;
io->len = 0;
switch (s->dma_cmd) {
case IDE_DMA_READ:
s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, 0x1,
pmac_ide_atapi_transfer_cb, io);
break;
case IDE_DMA_WRITE:
s->bus->dma->aiocb = dma_blk_write(s->blk, &s->sg, offset, 0x1,
pmac_ide_transfer_cb, io);
break;
case IDE_DMA_TRIM:
s->bus->dma->aiocb = dma_blk_io(blk_get_aio_context(s->blk), &s->sg,
offset, 0x1, ide_issue_trim, s->blk,
pmac_ide_transfer_cb, io,
DMA_DIRECTION_TO_DEVICE);
break;
default:
abort();
}
return;
done:
dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len,
io->dir, io->dma_len);
if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) {
if (ret < 0) {
block_acct_failed(blk_get_stats(s->blk), &s->acct);
} else {
block_acct_done(blk_get_stats(s->blk), &s->acct);
}
}
ide_set_inactive(s, false);
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;
IDEState *s = idebus_active_if(&m->bus);
if (s->bus->dma->aiocb) {
blk_drain(s->blk);
}
}
/* PowerMac IDE memory IO */
static uint64_t pmac_ide_read(void *opaque, hwaddr addr, unsigned size)
{
MACIOIDEState *d = opaque;
uint64_t retval = 0xffffffff;
int reg = addr >> 4;
switch (reg) {
case 0x0:
if (size == 2) {
retval = ide_data_readw(&d->bus, 0);
} else if (size == 4) {
retval = ide_data_readl(&d->bus, 0);
}
break;
case 0x1 ... 0x7:
if (size == 1) {
retval = ide_ioport_read(&d->bus, reg);
}
break;
case 0x8:
case 0x16:
if (size == 1) {
retval = ide_status_read(&d->bus, 0);
}
break;
case 0x20:
if (size == 4) {
retval = d->timing_reg;
}
break;
case 0x30:
/* This is an interrupt state register that only exists
* in the KeyLargo and later variants. Bit 0x8000_0000
* latches the DMA interrupt and has to be written to
* clear. Bit 0x4000_0000 is an image of the disk
* interrupt. MacOS X relies on this and will hang if
* we don't provide at least the disk interrupt
*/
if (size == 4) {
retval = d->irq_reg;
}
break;
}
return retval;
}
static void pmac_ide_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
MACIOIDEState *d = opaque;
int reg = addr >> 4;
switch (reg) {
case 0x0:
if (size == 2) {
ide_data_writew(&d->bus, 0, val);
} else if (size == 4) {
ide_data_writel(&d->bus, 0, val);
}
break;
case 0x1 ... 0x7:
if (size == 1) {
ide_ioport_write(&d->bus, reg, val);
}
break;
case 0x8:
case 0x16:
if (size == 1) {
ide_cmd_write(&d->bus, 0, val);
}
break;
case 0x20:
if (size == 4) {
d->timing_reg = val;
}
break;
case 0x30:
if (size == 4) {
if (val & 0x80000000u) {
d->irq_reg &= 0x7fffffff;
}
}
break;
}
}
static const MemoryRegionOps pmac_ide_ops = {
.read = pmac_ide_read,
.write = pmac_ide_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const VMStateDescription vmstate_pmac = {
.name = "ide",
.version_id = 5,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_IDE_BUS(bus, MACIOIDEState),
VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
VMSTATE_BOOL(dma_active, MACIOIDEState),
VMSTATE_UINT32(timing_reg, MACIOIDEState),
VMSTATE_UINT32(irq_reg, 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, int32_t l)
{
return 0;
}
static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
BlockCompletionFunc *cb)
{
MACIOIDEState *m = container_of(dma, MACIOIDEState, dma);
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 * BDRV_SECTOR_SIZE;
}
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");
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->ide_irq);
/* Register DMA callbacks */
s->dma.ops = &dbdma_ops;
s->bus.dma = &s->dma;
}
static void pmac_ide_irq(void *opaque, int n, int level)
{
MACIOIDEState *s = opaque;
uint32_t mask = 0x80000000u >> n;
/* We need to reflect the IRQ state in the irq register */
if (level) {
s->irq_reg |= mask;
} else {
s->irq_reg &= ~mask;
}
if (n) {
qemu_set_irq(s->real_ide_irq, level);
} else {
qemu_set_irq(s->real_dma_irq, level);
}
}
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->real_ide_irq);
sysbus_init_irq(d, &s->real_dma_irq);
s->dma_irq = qemu_allocate_irq(pmac_ide_irq, s, 0);
s->ide_irq = qemu_allocate_irq(pmac_ide_irq, s, 1);
object_property_add_link(obj, "dbdma", TYPE_MAC_DBDMA,
(Object **) &s->dbdma,
qdev_prop_allow_set_link_before_realize, 0, NULL);
}
static Property macio_ide_properties[] = {
DEFINE_PROP_UINT32("channel", MACIOIDEState, channel, 0),
DEFINE_PROP_END_OF_LIST(),
};
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->props = macio_ide_properties;
dc->vmsd = &vmstate_pmac;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
}
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)
{
DBDMA_register_channel(s->dbdma, s->channel, s->dma_irq,
pmac_ide_transfer, pmac_ide_flush, s);
}
type_init(macio_ide_register_types)
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