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-rw-r--r--hw/ide/macio.c268
-rw-r--r--include/hw/ppc/mac_dbdma.h4
2 files changed, 125 insertions, 147 deletions
diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index 037db8b..585a27b 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -144,6 +144,101 @@ static void pmac_dma_read(BlockBackend *blk,
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;
@@ -218,24 +313,19 @@ 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);
- int n = 0;
int64_t sector_num;
- int unaligned;
+ int nsector, remainder;
+
+ MACIO_DPRINTF("pmac_ide_transfer_cb\n");
if (ret < 0) {
MACIO_DPRINTF("DMA error\n");
m->aiocb = NULL;
- qemu_sglist_destroy(&s->sg);
ide_dma_error(s);
io->remainder_len = 0;
goto done;
}
- if (--io->requests) {
- /* More requests still in flight */
- return;
- }
-
if (!m->dma_active) {
MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
s->nsector, io->len, s->status);
@@ -244,155 +334,48 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
return;
}
- sector_num = ide_get_sector(s);
- MACIO_DPRINTF("io_buffer_size = %#x\n", s->io_buffer_size);
- if (s->io_buffer_size > 0) {
- m->aiocb = NULL;
- qemu_sglist_destroy(&s->sg);
- n = (s->io_buffer_size + 0x1ff) >> 9;
- sector_num += n;
- ide_set_sector(s, sector_num);
- s->nsector -= n;
- }
-
- if (io->finish_remain_read) {
- /* Finish a stale read from the last iteration */
- io->finish_remain_read = false;
- cpu_physical_memory_write(io->finish_addr, io->remainder,
- io->finish_len);
- }
-
- MACIO_DPRINTF("remainder: %d io->len: %d nsector: %d "
- "sector_num: %" PRId64 "\n",
- io->remainder_len, io->len, s->nsector, sector_num);
- if (io->remainder_len && io->len) {
- /* guest wants the rest of its previous transfer */
- int remainder_len = MIN(io->remainder_len, io->len);
- uint8_t *p = &io->remainder[0x200 - remainder_len];
-
- MACIO_DPRINTF("copying remainder %d bytes at %#" HWADDR_PRIx "\n",
- remainder_len, io->addr);
-
- switch (s->dma_cmd) {
- case IDE_DMA_READ:
- cpu_physical_memory_write(io->addr, p, remainder_len);
- break;
- case IDE_DMA_WRITE:
- cpu_physical_memory_read(io->addr, p, remainder_len);
- break;
- case IDE_DMA_TRIM:
- break;
- }
- io->addr += remainder_len;
- io->len -= remainder_len;
- io->remainder_len -= remainder_len;
-
- if (s->dma_cmd == IDE_DMA_WRITE && !io->remainder_len) {
- io->requests++;
- qemu_iovec_reset(&io->iov);
- qemu_iovec_add(&io->iov, io->remainder, 0x200);
-
- m->aiocb = blk_aio_writev(s->blk, sector_num - 1, &io->iov, 1,
- pmac_ide_transfer_cb, io);
- }
- }
-
- if (s->nsector == 0 && !io->remainder_len) {
+ 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\n");
+ MACIO_DPRINTF("End of DMA transfer\n");
goto done;
}
- /* launch next transfer */
-
- s->io_buffer_index = 0;
- s->io_buffer_size = MIN(io->len, s->nsector * 512);
-
- /* handle unaligned accesses first, get them over with and only do the
- remaining bulk transfer using our async DMA helpers */
- unaligned = io->len & 0x1ff;
- if (unaligned) {
- int nsector = io->len >> 9;
-
- MACIO_DPRINTF("precopying unaligned %d bytes to %#" HWADDR_PRIx "\n",
- unaligned, io->addr + io->len - unaligned);
-
- switch (s->dma_cmd) {
- case IDE_DMA_READ:
- io->requests++;
- io->finish_addr = io->addr + io->len - unaligned;
- io->finish_len = unaligned;
- io->finish_remain_read = true;
- qemu_iovec_reset(&io->iov);
- qemu_iovec_add(&io->iov, io->remainder, 0x200);
-
- m->aiocb = blk_aio_readv(s->blk, sector_num + nsector, &io->iov, 1,
- pmac_ide_transfer_cb, io);
- break;
- case IDE_DMA_WRITE:
- /* cache the contents in our io struct */
- cpu_physical_memory_read(io->addr + io->len - unaligned,
- io->remainder + io->remainder_len,
- unaligned);
- break;
- case IDE_DMA_TRIM:
- break;
- }
- }
-
- MACIO_DPRINTF("io->len = %#x\n", io->len);
-
- 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);
- io->addr += io->len + unaligned;
- io->remainder_len = (0x200 - unaligned) & 0x1ff;
- MACIO_DPRINTF("set remainder to: %d\n", io->remainder_len);
-
- /* Only subsector reads happening */
- if (!io->len) {
- if (!io->requests) {
- io->requests++;
- pmac_ide_transfer_cb(opaque, ret);
- }
- return;
- }
+ /* Calculate number of sectors */
+ sector_num = ide_get_sector(s) + (s->io_buffer_index >> 9);
+ nsector = (io->len + 0x1ff) >> 9;
+ remainder = io->len & 0x1ff;
- io->len = 0;
+ s->nsector -= nsector;
- MACIO_DPRINTF("sector_num=%" PRId64 " n=%d, nsector=%d, cmd_cmd=%d\n",
- sector_num, n, s->nsector, s->dma_cmd);
+ 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:
- m->aiocb = dma_blk_read(s->blk, &s->sg, sector_num,
- pmac_ide_transfer_cb, io);
+ pmac_dma_read(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_WRITE:
- m->aiocb = dma_blk_write(s->blk, &s->sg, sector_num,
- pmac_ide_transfer_cb, io);
+ pmac_dma_write(s->blk, sector_num, nsector, pmac_ide_transfer_cb, io);
break;
case IDE_DMA_TRIM:
- m->aiocb = dma_blk_io(s->blk, &s->sg, sector_num,
- ide_issue_trim, pmac_ide_transfer_cb, io,
- DMA_DIRECTION_TO_DEVICE);
+ MACIO_DPRINTF("TRIM command issued!");
break;
}
- io->requests++;
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(io);
+ io->dma_end(opaque);
}
static void pmac_ide_transfer(DBDMA_io *io)
@@ -408,8 +391,6 @@ static void pmac_ide_transfer(DBDMA_io *io)
pmac_ide_atapi_transfer_cb(io, 0);
return;
- } else {
- s->io_buffer_size = 0;
}
switch (s->dma_cmd) {
@@ -425,7 +406,6 @@ static void pmac_ide_transfer(DBDMA_io *io)
break;
}
- io->requests++;
pmac_ide_transfer_cb(io, 0);
}
@@ -585,22 +565,24 @@ static void ide_dbdma_start(IDEDMA *dma, IDEState *s,
DBDMA_io *io;
int i;
+ s->io_buffer_index = 0;
if (s->drive_kind == IDE_CD) {
- s->io_buffer_index = 0;
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");
+ 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;
+ for (i = 0; i < DBDMA_CHANNELS; i++) {
+ io = &dbdma->channels[i].io;
- if (io->opaque == m) {
- io->remainder_len = 0;
- }
+ if (io->opaque == m) {
+ io->remainder_len = 0;
}
}
diff --git a/include/hw/ppc/mac_dbdma.h b/include/hw/ppc/mac_dbdma.h
index d7db06c..c580327 100644
--- a/include/hw/ppc/mac_dbdma.h
+++ b/include/hw/ppc/mac_dbdma.h
@@ -43,10 +43,6 @@ struct DBDMA_io {
uint8_t remainder[0x200];
int remainder_len;
QEMUIOVector iov;
- bool finish_remain_read;
- hwaddr finish_addr;
- hwaddr finish_len;
- int requests;
};
/*
generated by cgit v1.1 at 2024-10-31 18:20:04 +0000