We only care about the associated backend, so blk_drain is more appropriate here. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20160612065603.21911-1-famz@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
647 lines
17 KiB
C
647 lines
17 KiB
C
/*
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* QEMU IDE Emulation: MacIO support.
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*
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* Copyright (c) 2003 Fabrice Bellard
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* Copyright (c) 2006 Openedhand Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/ppc/mac.h"
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#include "hw/ppc/mac_dbdma.h"
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#include "sysemu/block-backend.h"
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#include "sysemu/dma.h"
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#include <hw/ide/internal.h>
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/* debug MACIO */
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// #define DEBUG_MACIO
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#ifdef DEBUG_MACIO
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static const int debug_macio = 1;
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#else
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static const int debug_macio = 0;
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#endif
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#define MACIO_DPRINTF(fmt, ...) do { \
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if (debug_macio) { \
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printf(fmt , ## __VA_ARGS__); \
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} \
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} while (0)
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/***********************************************************/
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/* MacIO based PowerPC IDE */
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#define MACIO_PAGE_SIZE 4096
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/*
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* Unaligned DMA read/write access functions required for OS X/Darwin which
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* don't perform DMA transactions on sector boundaries. These functions are
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* modelled on bdrv_co_preadv()/bdrv_co_pwritev() and so should be easy to
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* remove if the unaligned block APIs are ever exposed.
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*/
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static void pmac_dma_read(BlockBackend *blk,
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int64_t offset, unsigned int bytes,
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void (*cb)(void *opaque, int ret), void *opaque)
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{
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DBDMA_io *io = opaque;
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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dma_addr_t dma_addr;
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int64_t sector_num;
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int nsector;
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uint64_t align = BDRV_SECTOR_SIZE;
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size_t head_bytes, tail_bytes;
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qemu_iovec_destroy(&io->iov);
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qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
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sector_num = (offset >> 9);
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nsector = (io->len >> 9);
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MACIO_DPRINTF("--- DMA read transfer (0x%" HWADDR_PRIx ",0x%x): "
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"sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
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sector_num, nsector);
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dma_addr = io->addr;
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io->dir = DMA_DIRECTION_FROM_DEVICE;
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io->dma_len = io->len;
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io->dma_mem = dma_memory_map(&address_space_memory, dma_addr, &io->dma_len,
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io->dir);
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if (offset & (align - 1)) {
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head_bytes = offset & (align - 1);
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MACIO_DPRINTF("--- DMA unaligned head: sector %" PRId64 ", "
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"discarding %zu bytes\n", sector_num, head_bytes);
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qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
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bytes += offset & (align - 1);
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offset = offset & ~(align - 1);
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}
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qemu_iovec_add(&io->iov, io->dma_mem, io->len);
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if ((offset + bytes) & (align - 1)) {
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tail_bytes = (offset + bytes) & (align - 1);
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MACIO_DPRINTF("--- DMA unaligned tail: sector %" PRId64 ", "
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"discarding bytes %zu\n", sector_num, tail_bytes);
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qemu_iovec_add(&io->iov, &io->tail_remainder, align - tail_bytes);
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bytes = ROUND_UP(bytes, align);
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}
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s->io_buffer_size -= io->len;
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s->io_buffer_index += io->len;
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io->len = 0;
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MACIO_DPRINTF("--- Block read transfer - sector_num: %" PRIx64 " "
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"nsector: %x\n", (offset >> 9), (bytes >> 9));
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s->bus->dma->aiocb = blk_aio_preadv(blk, offset, &io->iov, 0, cb, io);
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}
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static void pmac_dma_write(BlockBackend *blk,
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int64_t offset, int bytes,
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void (*cb)(void *opaque, int ret), void *opaque)
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{
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DBDMA_io *io = opaque;
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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dma_addr_t dma_addr;
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int64_t sector_num;
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int nsector;
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uint64_t align = BDRV_SECTOR_SIZE;
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size_t head_bytes, tail_bytes;
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bool unaligned_head = false, unaligned_tail = false;
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qemu_iovec_destroy(&io->iov);
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qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
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sector_num = (offset >> 9);
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nsector = (io->len >> 9);
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MACIO_DPRINTF("--- DMA write transfer (0x%" HWADDR_PRIx ",0x%x): "
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"sector_num: %" PRId64 ", nsector: %d\n", io->addr, io->len,
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sector_num, nsector);
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dma_addr = io->addr;
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io->dir = DMA_DIRECTION_TO_DEVICE;
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io->dma_len = io->len;
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io->dma_mem = dma_memory_map(&address_space_memory, dma_addr, &io->dma_len,
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io->dir);
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if (offset & (align - 1)) {
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head_bytes = offset & (align - 1);
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sector_num = ((offset & ~(align - 1)) >> 9);
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MACIO_DPRINTF("--- DMA unaligned head: pre-reading head sector %"
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PRId64 "\n", sector_num);
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blk_pread(s->blk, (sector_num << 9), &io->head_remainder, align);
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qemu_iovec_add(&io->iov, &io->head_remainder, head_bytes);
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qemu_iovec_add(&io->iov, io->dma_mem, io->len);
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bytes += offset & (align - 1);
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offset = offset & ~(align - 1);
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unaligned_head = true;
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}
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if ((offset + bytes) & (align - 1)) {
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tail_bytes = (offset + bytes) & (align - 1);
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sector_num = (((offset + bytes) & ~(align - 1)) >> 9);
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MACIO_DPRINTF("--- DMA unaligned tail: pre-reading tail sector %"
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PRId64 "\n", sector_num);
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blk_pread(s->blk, (sector_num << 9), &io->tail_remainder, align);
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if (!unaligned_head) {
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qemu_iovec_add(&io->iov, io->dma_mem, io->len);
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}
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qemu_iovec_add(&io->iov, &io->tail_remainder + tail_bytes,
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align - tail_bytes);
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bytes = ROUND_UP(bytes, align);
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unaligned_tail = true;
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}
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if (!unaligned_head && !unaligned_tail) {
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qemu_iovec_add(&io->iov, io->dma_mem, io->len);
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}
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s->io_buffer_size -= io->len;
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s->io_buffer_index += io->len;
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io->len = 0;
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MACIO_DPRINTF("--- Block write transfer - sector_num: %" PRIx64 " "
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"nsector: %x\n", (offset >> 9), (bytes >> 9));
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s->bus->dma->aiocb = blk_aio_pwritev(blk, offset, &io->iov, 0, cb, io);
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}
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static void pmac_dma_trim(BlockBackend *blk,
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int64_t offset, int bytes,
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void (*cb)(void *opaque, int ret), void *opaque)
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{
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DBDMA_io *io = opaque;
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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dma_addr_t dma_addr;
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qemu_iovec_destroy(&io->iov);
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qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1);
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dma_addr = io->addr;
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io->dir = DMA_DIRECTION_TO_DEVICE;
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io->dma_len = io->len;
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io->dma_mem = dma_memory_map(&address_space_memory, dma_addr, &io->dma_len,
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io->dir);
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qemu_iovec_add(&io->iov, io->dma_mem, io->len);
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s->io_buffer_size -= io->len;
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s->io_buffer_index += io->len;
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io->len = 0;
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s->bus->dma->aiocb = ide_issue_trim(offset, &io->iov, cb, io, blk);
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}
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static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
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{
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DBDMA_io *io = opaque;
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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int64_t offset;
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MACIO_DPRINTF("pmac_ide_atapi_transfer_cb\n");
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if (ret < 0) {
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MACIO_DPRINTF("DMA error: %d\n", ret);
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ide_atapi_io_error(s, ret);
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goto done;
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}
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if (!m->dma_active) {
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MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
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s->nsector, io->len, s->status);
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/* data not ready yet, wait for the channel to get restarted */
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io->processing = false;
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return;
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}
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if (s->io_buffer_size <= 0) {
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MACIO_DPRINTF("End of IDE transfer\n");
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ide_atapi_cmd_ok(s);
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m->dma_active = false;
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goto done;
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}
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if (io->len == 0) {
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MACIO_DPRINTF("End of DMA transfer\n");
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goto done;
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}
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if (s->lba == -1) {
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/* Non-block ATAPI transfer - just copy to RAM */
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s->io_buffer_size = MIN(s->io_buffer_size, io->len);
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dma_memory_write(&address_space_memory, io->addr, s->io_buffer,
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s->io_buffer_size);
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ide_atapi_cmd_ok(s);
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m->dma_active = false;
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goto done;
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}
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/* Calculate current offset */
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offset = ((int64_t)s->lba << 11) + s->io_buffer_index;
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pmac_dma_read(s->blk, offset, io->len, pmac_ide_atapi_transfer_cb, io);
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return;
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done:
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dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len,
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io->dir, io->dma_len);
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if (ret < 0) {
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block_acct_failed(blk_get_stats(s->blk), &s->acct);
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} else {
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block_acct_done(blk_get_stats(s->blk), &s->acct);
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}
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ide_set_inactive(s, false);
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io->dma_end(opaque);
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}
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static void pmac_ide_transfer_cb(void *opaque, int ret)
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{
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DBDMA_io *io = opaque;
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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int64_t offset;
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MACIO_DPRINTF("pmac_ide_transfer_cb\n");
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if (ret < 0) {
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MACIO_DPRINTF("DMA error: %d\n", ret);
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ide_dma_error(s);
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goto done;
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}
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if (!m->dma_active) {
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MACIO_DPRINTF("waiting for data (%#x - %#x - %x)\n",
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s->nsector, io->len, s->status);
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/* data not ready yet, wait for the channel to get restarted */
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io->processing = false;
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return;
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}
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if (s->io_buffer_size <= 0) {
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MACIO_DPRINTF("End of IDE transfer\n");
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s->status = READY_STAT | SEEK_STAT;
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ide_set_irq(s->bus);
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m->dma_active = false;
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goto done;
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}
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if (io->len == 0) {
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MACIO_DPRINTF("End of DMA transfer\n");
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goto done;
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}
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/* Calculate number of sectors */
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offset = (ide_get_sector(s) << 9) + s->io_buffer_index;
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switch (s->dma_cmd) {
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case IDE_DMA_READ:
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pmac_dma_read(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
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break;
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case IDE_DMA_WRITE:
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pmac_dma_write(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
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break;
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case IDE_DMA_TRIM:
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pmac_dma_trim(s->blk, offset, io->len, pmac_ide_transfer_cb, io);
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break;
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default:
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abort();
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}
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return;
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done:
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dma_memory_unmap(&address_space_memory, io->dma_mem, io->dma_len,
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io->dir, io->dma_len);
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if (s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) {
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if (ret < 0) {
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block_acct_failed(blk_get_stats(s->blk), &s->acct);
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} else {
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block_acct_done(blk_get_stats(s->blk), &s->acct);
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}
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}
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ide_set_inactive(s, false);
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io->dma_end(opaque);
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}
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static void pmac_ide_transfer(DBDMA_io *io)
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{
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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MACIO_DPRINTF("\n");
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if (s->drive_kind == IDE_CD) {
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block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
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BLOCK_ACCT_READ);
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pmac_ide_atapi_transfer_cb(io, 0);
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return;
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}
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switch (s->dma_cmd) {
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case IDE_DMA_READ:
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block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
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BLOCK_ACCT_READ);
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break;
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case IDE_DMA_WRITE:
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block_acct_start(blk_get_stats(s->blk), &s->acct, io->len,
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BLOCK_ACCT_WRITE);
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break;
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default:
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break;
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}
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pmac_ide_transfer_cb(io, 0);
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}
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static void pmac_ide_flush(DBDMA_io *io)
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{
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MACIOIDEState *m = io->opaque;
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IDEState *s = idebus_active_if(&m->bus);
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if (s->bus->dma->aiocb) {
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blk_drain(s->blk);
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}
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}
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/* PowerMac IDE memory IO */
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static void pmac_ide_writeb (void *opaque,
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hwaddr addr, uint32_t val)
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{
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MACIOIDEState *d = opaque;
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addr = (addr & 0xFFF) >> 4;
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switch (addr) {
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case 1 ... 7:
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ide_ioport_write(&d->bus, addr, val);
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break;
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case 8:
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case 22:
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ide_cmd_write(&d->bus, 0, val);
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break;
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default:
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break;
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}
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}
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static uint32_t pmac_ide_readb (void *opaque,hwaddr addr)
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{
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uint8_t retval;
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MACIOIDEState *d = opaque;
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addr = (addr & 0xFFF) >> 4;
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switch (addr) {
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case 1 ... 7:
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retval = ide_ioport_read(&d->bus, addr);
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break;
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case 8:
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case 22:
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retval = ide_status_read(&d->bus, 0);
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break;
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default:
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retval = 0xFF;
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break;
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}
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return retval;
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}
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static void pmac_ide_writew (void *opaque,
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hwaddr addr, uint32_t val)
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{
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MACIOIDEState *d = opaque;
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addr = (addr & 0xFFF) >> 4;
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val = bswap16(val);
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if (addr == 0) {
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ide_data_writew(&d->bus, 0, val);
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}
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}
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static uint32_t pmac_ide_readw (void *opaque,hwaddr addr)
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{
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uint16_t retval;
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MACIOIDEState *d = opaque;
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addr = (addr & 0xFFF) >> 4;
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if (addr == 0) {
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retval = ide_data_readw(&d->bus, 0);
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} else {
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retval = 0xFFFF;
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}
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retval = bswap16(retval);
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return retval;
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}
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static void pmac_ide_writel (void *opaque,
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hwaddr addr, uint32_t val)
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{
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MACIOIDEState *d = opaque;
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addr = (addr & 0xFFF) >> 4;
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val = bswap32(val);
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if (addr == 0) {
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ide_data_writel(&d->bus, 0, val);
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}
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}
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static uint32_t pmac_ide_readl (void *opaque,hwaddr addr)
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{
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uint32_t retval;
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MACIOIDEState *d = opaque;
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addr = (addr & 0xFFF) >> 4;
|
|
if (addr == 0) {
|
|
retval = ide_data_readl(&d->bus, 0);
|
|
} else {
|
|
retval = 0xFFFFFFFF;
|
|
}
|
|
retval = bswap32(retval);
|
|
return retval;
|
|
}
|
|
|
|
static const MemoryRegionOps pmac_ide_ops = {
|
|
.old_mmio = {
|
|
.write = {
|
|
pmac_ide_writeb,
|
|
pmac_ide_writew,
|
|
pmac_ide_writel,
|
|
},
|
|
.read = {
|
|
pmac_ide_readb,
|
|
pmac_ide_readw,
|
|
pmac_ide_readl,
|
|
},
|
|
},
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
static const VMStateDescription vmstate_pmac = {
|
|
.name = "ide",
|
|
.version_id = 4,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_IDE_BUS(bus, MACIOIDEState),
|
|
VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
|
|
VMSTATE_BOOL(dma_active, 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->irq);
|
|
|
|
/* Register DMA callbacks */
|
|
s->dma.ops = &dbdma_ops;
|
|
s->bus.dma = &s->dma;
|
|
}
|
|
|
|
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->irq);
|
|
sysbus_init_irq(d, &s->dma_irq);
|
|
}
|
|
|
|
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->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, void *dbdma, int channel)
|
|
{
|
|
s->dbdma = dbdma;
|
|
DBDMA_register_channel(dbdma, channel, s->dma_irq,
|
|
pmac_ide_transfer, pmac_ide_flush, s);
|
|
}
|
|
|
|
type_init(macio_ide_register_types)
|