diff options
| -rw-r--r-- | hw/ide/macio.c | 131 | ||||
| -rw-r--r-- | include/hw/ppc/mac_dbdma.h | 3 |
2 files changed, 127 insertions, 7 deletions
diff --git a/hw/ide/macio.c b/hw/ide/macio.c index 2b1e51d49e..18bc1d1273 100644 --- a/hw/ide/macio.c +++ b/hw/ide/macio.c @@ -56,11 +56,13 @@ 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); + int unaligned; if (ret < 0) { m->aiocb = NULL; qemu_sglist_destroy(&s->sg); ide_atapi_io_error(s, ret); + io->remainder_len = 0; goto done; } @@ -85,7 +87,31 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret) s->io_buffer_index &= 0x7ff; } - if (s->packet_transfer_size <= 0) { + s->io_buffer_size = io->len; + + MACIO_DPRINTF("remainder: %d io->len: %d size: %d\n", io->remainder_len, + io->len, s->packet_transfer_size); + if (io->remainder_len && io->len) { + /* guest wants the rest of its previous transfer */ + int remainder_len = MIN(io->remainder_len, io->len); + + MACIO_DPRINTF("copying remainder %d bytes\n", remainder_len); + + cpu_physical_memory_write(io->addr, io->remainder + 0x200 - + remainder_len, remainder_len); + + io->addr += remainder_len; + io->len -= remainder_len; + s->io_buffer_size = remainder_len; + io->remainder_len -= remainder_len; + /* treat remainder as individual transfer, start again */ + qemu_sglist_init(&s->sg, DEVICE(m), io->len / MACIO_PAGE_SIZE + 1, + &address_space_memory); + pmac_ide_atapi_transfer_cb(opaque, 0); + return; + } + + if (!s->packet_transfer_size) { MACIO_DPRINTF("end of transfer\n"); ide_atapi_cmd_ok(s); m->dma_active = false; @@ -98,14 +124,40 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret) /* launch next transfer */ - MACIO_DPRINTF("io->len = %#x\n", io->len); + /* 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 sector_num = (s->lba << 2) + (s->io_buffer_index >> 9); + int nsector = io->len >> 9; - s->io_buffer_size = io->len; + MACIO_DPRINTF("precopying unaligned %d bytes to %#lx\n", + unaligned, io->addr + io->len - unaligned); + + bdrv_read(s->bs, sector_num + nsector, io->remainder, 1); + cpu_physical_memory_write(io->addr + io->len - unaligned, + io->remainder, unaligned); + + io->len -= unaligned; + } + + 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; + io->addr += s->io_buffer_size; + io->remainder_len = MIN(s->packet_transfer_size - s->io_buffer_size, + (0x200 - unaligned) & 0x1ff); + MACIO_DPRINTF("set remainder to: %d\n", io->remainder_len); + + /* We would read no data from the block layer, thus not get a callback. + Just fake completion manually. */ + if (!io->len) { + pmac_ide_atapi_transfer_cb(opaque, 0); + return; + } + io->len = 0; MACIO_DPRINTF("sector_num=%d size=%d, cmd_cmd=%d\n", @@ -128,14 +180,16 @@ 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; + int n = 0; int64_t sector_num; + int unaligned; 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; } @@ -158,7 +212,33 @@ static void pmac_ide_transfer_cb(void *opaque, int ret) s->nsector -= n; } - if (s->nsector == 0) { + MACIO_DPRINTF("remainder: %d io->len: %d nsector: %d sector_num: %ld\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 %#lx\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); + bdrv_write(s->bs, sector_num - 1, io->remainder, 1); + break; + case IDE_DMA_TRIM: + break; + } + io->addr += remainder_len; + io->len -= remainder_len; + io->remainder_len -= remainder_len; + } + + if (s->nsector == 0 && !io->remainder_len) { MACIO_DPRINTF("end of transfer\n"); s->status = READY_STAT | SEEK_STAT; ide_set_irq(s->bus); @@ -175,12 +255,49 @@ static void pmac_ide_transfer_cb(void *opaque, int ret) s->io_buffer_index = 0; s->io_buffer_size = io->len; + /* 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 %#lx\n", + unaligned, io->addr + io->len - unaligned); + + switch (s->dma_cmd) { + case IDE_DMA_READ: + bdrv_read(s->bs, sector_num + nsector, io->remainder, 1); + cpu_physical_memory_write(io->addr + io->len - unaligned, + io->remainder, unaligned); + break; + case IDE_DMA_WRITE: + /* cache the contents in our io struct */ + cpu_physical_memory_read(io->addr + io->len - unaligned, + io->remainder, unaligned); + break; + case IDE_DMA_TRIM: + break; + } + + io->len -= unaligned; + } + 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; + io->addr += io->len + unaligned; + io->remainder_len = (0x200 - unaligned) & 0x1ff; + MACIO_DPRINTF("set remainder to: %d\n", io->remainder_len); + + /* We would read no data from the block layer, thus not get a callback. + Just fake completion manually. */ + if (!io->len) { + pmac_ide_transfer_cb(opaque, 0); + return; + } + io->len = 0; MACIO_DPRINTF("sector_num=%" PRId64 " n=%d, nsector=%d, cmd_cmd=%d\n", diff --git a/include/hw/ppc/mac_dbdma.h b/include/hw/ppc/mac_dbdma.h index 4d7318df84..90efd277e4 100644 --- a/include/hw/ppc/mac_dbdma.h +++ b/include/hw/ppc/mac_dbdma.h @@ -39,6 +39,9 @@ struct DBDMA_io { DBDMA_end dma_end; /* DMA is in progress, don't start another one */ bool processing; + /* unaligned last sector of a request */ + uint8_t remainder[0x200]; + int remainder_len; }; /* |