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/*
* QEMU IDE Emulation: PCI Bus 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/pc.h>
#include <hw/pci.h>
#include <hw/isa.h>
#include "block.h"
#include "block_int.h"
#include "sysemu.h"
#include "dma.h"
#include <hw/ide/pci.h>
void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val)
{
BMDMAState *bm = opaque;
#ifdef DEBUG_IDE
printf("%s: 0x%08x\n", __func__, val);
#endif
/* Ignore writes to SSBM if it keeps the old value */
if ((val & BM_CMD_START) != (bm->cmd & BM_CMD_START)) {
if (!(val & BM_CMD_START)) {
/*
* We can't cancel Scatter Gather DMA in the middle of the
* operation or a partial (not full) DMA transfer would reach
* the storage so we wait for completion instead (we beahve
* like if the DMA was completed by the time the guest trying
* to cancel dma with bmdma_cmd_writeb with BM_CMD_START not
* set).
*
* In the future we'll be able to safely cancel the I/O if the
* whole DMA operation will be submitted to disk with a single
* aio operation with preadv/pwritev.
*/
if (bm->aiocb) {
qemu_aio_flush();
#ifdef DEBUG_IDE
if (bm->aiocb)
printf("ide_dma_cancel: aiocb still pending");
if (bm->status & BM_STATUS_DMAING)
printf("ide_dma_cancel: BM_STATUS_DMAING still pending");
#endif
}
} else {
if (!(bm->status & BM_STATUS_DMAING)) {
bm->status |= BM_STATUS_DMAING;
/* start dma transfer if possible */
if (bm->dma_cb)
bm->dma_cb(bm, 0);
}
}
}
bm->cmd = val & 0x09;
}
static void bmdma_addr_read(IORange *ioport, uint64_t addr,
unsigned width, uint64_t *data)
{
BMDMAState *bm = container_of(ioport, BMDMAState, addr_ioport);
uint32_t mask = (1ULL << (width * 8)) - 1;
*data = (bm->addr >> (addr * 8)) & mask;
#ifdef DEBUG_IDE
printf("%s: 0x%08x\n", __func__, (unsigned)*data);
#endif
}
static void bmdma_addr_write(IORange *ioport, uint64_t addr,
unsigned width, uint64_t data)
{
BMDMAState *bm = container_of(ioport, BMDMAState, addr_ioport);
int shift = addr * 8;
uint32_t mask = (1ULL << (width * 8)) - 1;
#ifdef DEBUG_IDE
printf("%s: 0x%08x\n", __func__, (unsigned)data);
#endif
bm->addr &= ~(mask << shift);
bm->addr |= ((data & mask) << shift) & ~3;
bm->cur_addr = bm->addr;
}
const IORangeOps bmdma_addr_ioport_ops = {
.read = bmdma_addr_read,
.write = bmdma_addr_write,
};
static bool ide_bmdma_current_needed(void *opaque)
{
BMDMAState *bm = opaque;
return (bm->cur_prd_len != 0);
}
static const VMStateDescription vmstate_bmdma_current = {
.name = "ide bmdma_current",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT32(cur_addr, BMDMAState),
VMSTATE_UINT32(cur_prd_last, BMDMAState),
VMSTATE_UINT32(cur_prd_addr, BMDMAState),
VMSTATE_UINT32(cur_prd_len, BMDMAState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_bmdma = {
.name = "ide bmdma",
.version_id = 3,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField []) {
VMSTATE_UINT8(cmd, BMDMAState),
VMSTATE_UINT8(status, BMDMAState),
VMSTATE_UINT32(addr, BMDMAState),
VMSTATE_INT64(sector_num, BMDMAState),
VMSTATE_UINT32(nsector, BMDMAState),
VMSTATE_UINT8(unit, BMDMAState),
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection []) {
{
.vmsd = &vmstate_bmdma_current,
.needed = ide_bmdma_current_needed,
}, {
/* empty */
}
}
};
static int ide_pci_post_load(void *opaque, int version_id)
{
PCIIDEState *d = opaque;
int i;
for(i = 0; i < 2; i++) {
/* current versions always store 0/1, but older version
stored bigger values. We only need last bit */
d->bmdma[i].unit &= 1;
}
return 0;
}
const VMStateDescription vmstate_ide_pci = {
.name = "ide",
.version_id = 3,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.post_load = ide_pci_post_load,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, PCIIDEState),
VMSTATE_STRUCT_ARRAY(bmdma, PCIIDEState, 2, 0,
vmstate_bmdma, BMDMAState),
VMSTATE_IDE_BUS_ARRAY(bus, PCIIDEState, 2),
VMSTATE_IDE_DRIVES(bus[0].ifs, PCIIDEState),
VMSTATE_IDE_DRIVES(bus[1].ifs, PCIIDEState),
VMSTATE_END_OF_LIST()
}
};
void pci_ide_create_devs(PCIDevice *dev, DriveInfo **hd_table)
{
PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
static const int bus[4] = { 0, 0, 1, 1 };
static const int unit[4] = { 0, 1, 0, 1 };
int i;
for (i = 0; i < 4; i++) {
if (hd_table[i] == NULL)
continue;
ide_create_drive(d->bus+bus[i], unit[i], hd_table[i]);
}
}
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