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Merge remote-tracking branch 'remotes/jnsnow/tags/ide-pull-request' into staging

# gpg: Signature made Fri Jun  5 20:59:07 2015 BST using RSA key ID AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: FAEB 9711 A12C F475 812F  18F2 88A9 064D 1835 61EB
#      Subkey fingerprint: F9B7 ABDB BCAC DF95 BE76  CBD0 7DEF 8106 AAFC 390E

* remotes/jnsnow/tags/ide-pull-request:
  macio: remove remainder_len DBDMA_io property
  macio: update comment/constants to reflect the new code
  macio: switch pmac_dma_write() over to new offset/len implementation
  macio: switch pmac_dma_read() over to new offset/len implementation
  fdc-test: Test state for existing cases more thoroughly
  fdc: Fix MSR.RQM flag
  fdc: Disentangle phases in fdctrl_read_data()
  fdc: Code cleanup in fdctrl_write_data()
  fdc: Use phase in fdctrl_write_data()
  fdc: Introduce fdctrl->phase
  fdc: Rename fdctrl_set_fifo() to fdctrl_to_result_phase()
  fdc: Rename fdctrl_reset_fifo() to fdctrl_to_command_phase()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2015-06-08 14:07:32 +01:00
commit 2e29dd7c44
4 changed files with 364 additions and 253 deletions
Download patch file Download diff file Expand all files Collapse all files

281
hw/ide/macio.c
View file

@ -51,8 +51,15 @@ static const int debug_macio = 0;
#define MACIO_PAGE_SIZE 4096
/*
* Unaligned DMA read/write access functions required for OS X/Darwin which
* don't perform DMA transactions on sector boundaries. These functions are
* modelled on bdrv_co_do_preadv()/bdrv_co_do_pwritev() and so should be
* easy to remove if the unaligned block APIs are ever exposed.
*/
static void pmac_dma_read(BlockBackend *blk,
int64_t sector_num, int nb_sectors,
int64_t offset, unsigned int bytes,
void (*cb)(void *opaque, int ret), void *opaque)
{
DBDMA_io *io = opaque;
@ -60,76 +67,48 @@ static void pmac_dma_read(BlockBackend *blk,
IDEState *s = idebus_active_if(&m->bus);
dma_addr_t dma_addr, dma_len;
void *mem;
int nsector, remainder;
int64_t sector_num;
int nsector;
uint64_t align = BDRV_SECTOR_SIZE;
size_t head_bytes, tail_bytes;
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);
sector_num = (offset >> 9);
nsector = (io->len >> 9);
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);
MACIO_DPRINTF("--- DMA read transfer (0x%" HWADDR_PRIx ",0x%x): "
"sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
sector_num, nsector);
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);
if (offset & (align - 1)) {
head_bytes = offset & (align - 1);
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);
MACIO_DPRINTF("--- DMA unaligned head: sector %" PRId64 ", "
"discarding %zu bytes\n", sector_num, head_bytes);
io->remainder_len = remainder;
qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
bytes += offset & (align - 1);
offset = offset & ~(align - 1);
}
qemu_iovec_add(&io->iov, mem, io->len);
if ((offset + bytes) & (align - 1)) {
tail_bytes = (offset + bytes) & (align - 1);
MACIO_DPRINTF("--- DMA unaligned tail: sector %" PRId64 ", "
"discarding bytes %zu\n", sector_num, tail_bytes);
qemu_iovec_add(&io->iov, &io->tail_remainder, align - tail_bytes);
bytes = ROUND_UP(bytes, align);
}
s->io_buffer_size -= io->len;
@ -137,15 +116,15 @@ static void pmac_dma_read(BlockBackend *blk,
io->len = 0;
MACIO_DPRINTF("--- Block read transfer - sector_num: %"PRIx64" "
"nsector: %x\n",
sector_num, nsector);
MACIO_DPRINTF("--- Block read transfer - sector_num: %" PRIx64 " "
"nsector: %x\n", (offset >> 9), (bytes >> 9));
m->aiocb = blk_aio_readv(blk, sector_num, &io->iov, nsector, cb, io);
m->aiocb = blk_aio_readv(blk, (offset >> 9), &io->iov, (bytes >> 9),
cb, io);
}
static void pmac_dma_write(BlockBackend *blk,
int64_t sector_num, int nb_sectors,
int64_t offset, int bytes,
void (*cb)(void *opaque, int ret), void *opaque)
{
DBDMA_io *io = opaque;
@ -153,53 +132,20 @@ static void pmac_dma_write(BlockBackend *blk,
IDEState *s = idebus_active_if(&m->bus);
dma_addr_t dma_addr, dma_len;
void *mem;
int nsector, remainder;
int extra = 0;
int64_t sector_num;
int nsector;
uint64_t align = BDRV_SECTOR_SIZE;
size_t head_bytes, tail_bytes;
bool unaligned_head = false, unaligned_tail = false;
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);
}
sector_num = (offset >> 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",
MACIO_DPRINTF("--- DMA write transfer (0x%" HWADDR_PRIx ",0x%x): "
"sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
sector_num, nsector);
dma_addr = io->addr;
@ -207,36 +153,59 @@ static void pmac_dma_write(BlockBackend *blk,
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);
if (offset & (align - 1)) {
head_bytes = offset & (align - 1);
sector_num = ((offset & ~(align - 1)) >> 9);
MACIO_DPRINTF("--- DMA unaligned head: pre-reading head sector %"
PRId64 "\n", sector_num);
blk_pread(s->blk, (sector_num << 9), &io->head_remainder, align);
qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
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);
bytes += offset & (align - 1);
offset = offset & ~(align - 1);
io->remainder_len = 0x200 - remainder;
MACIO_DPRINTF("xxx remainder_len: %x\n", io->remainder_len);
unaligned_head = true;
}
s->io_buffer_size -= ((nsector + extra) << 9);
s->io_buffer_index += ((nsector + extra) << 9);
if ((offset + bytes) & (align - 1)) {
tail_bytes = (offset + bytes) & (align - 1);
sector_num = (((offset + bytes) & ~(align - 1)) >> 9);
MACIO_DPRINTF("--- DMA unaligned tail: pre-reading tail sector %"
PRId64 "\n", sector_num);
blk_pread(s->blk, (sector_num << 9), &io->tail_remainder, align);
if (!unaligned_head) {
qemu_iovec_add(&io->iov, mem, io->len);
}
qemu_iovec_add(&io->iov, &io->tail_remainder + tail_bytes,
align - tail_bytes);
bytes = ROUND_UP(bytes, align);
unaligned_tail = true;
}
if (!unaligned_head && !unaligned_tail) {
qemu_iovec_add(&io->iov, mem, io->len);
}
s->io_buffer_size -= io->len;
s->io_buffer_index += io->len;
io->len = 0;
MACIO_DPRINTF("--- Block write transfer - sector_num: %"PRIx64" "
"nsector: %x\n", sector_num, nsector + extra);
MACIO_DPRINTF("--- Block write transfer - sector_num: %" PRIx64 " "
"nsector: %x\n", (offset >> 9), (bytes >> 9));
m->aiocb = blk_aio_writev(blk, sector_num, &io->iov, nsector + extra, cb,
io);
m->aiocb = blk_aio_writev(blk, (offset >> 9), &io->iov, (bytes >> 9),
cb, io);
}
static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
@ -244,19 +213,12 @@ 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;
int64_t offset;
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);
MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n");
if (ret < 0) {
MACIO_DPRINTF("THERE WAS AN ERROR! %d\n", ret);
MACIO_DPRINTF("DMA error: %d\n", ret);
ide_atapi_io_error(s, ret);
goto done;
}
@ -270,6 +232,7 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
}
if (s->io_buffer_size <= 0) {
MACIO_DPRINTF("End of IDE transfer\n");
ide_atapi_cmd_ok(s);
m->dma_active = false;
goto done;
@ -289,19 +252,13 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
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;
/* Calculate current offset */
offset = (int64_t)(s->lba << 11) + s->io_buffer_index;
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);
pmac_dma_read(s->blk, offset, io->len, 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);
@ -313,16 +270,14 @@ 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;
int64_t offset;
MACIO_DPRINTF("pmac_ide_transfer_cb\n");
if (ret < 0) {
MACIO_DPRINTF("DMA error\n");
MACIO_DPRINTF("DMA error: %d\n", ret);
m->aiocb = NULL;
ide_dma_error(s);
io->remainder_len = 0;
goto done;
}
@ -335,7 +290,7 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
}
if (s->io_buffer_size <= 0) {
MACIO_DPRINTF("end of transfer\n");
MACIO_DPRINTF("End of IDE transfer\n");
s->status = READY_STAT | SEEK_STAT;
ide_set_irq(s->bus);
m->dma_active = false;
@ -348,24 +303,16 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
}
/* 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);
offset = (ide_get_sector(s) << 9) + s->io_buffer_index;
switch (s->dma_cmd) {
case IDE_DMA_READ:
pmac_dma_read(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
pmac_dma_read(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_WRITE:
pmac_dma_write(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
pmac_dma_write(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_TRIM:
MACIO_DPRINTF("TRIM command issued!");
break;
}
@ -561,15 +508,12 @@ 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;
s->io_buffer_size = s->nsector * BDRV_SECTOR_SIZE;
}
MACIO_DPRINTF("\n\n------------ IDE transfer\n");
@ -578,15 +522,6 @@ static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
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);
}