diff options
author | Alexander Graf <agraf@suse.de> | 2010-12-15 00:23:00 +0100 |
---|---|---|
committer | Kevin Wolf <kwolf@redhat.com> | 2010-12-17 16:11:01 +0100 |
commit | 40a6238a20134a4687f67072d9be99cd97aab59a (patch) | |
tree | 85856a4343e8d7dcd4b6daf60ccbf355883ecebe /hw | |
parent | 6ef2ba5ea64e9feffdd1a8ffff66749323f719c8 (diff) | |
download | hqemu-40a6238a20134a4687f67072d9be99cd97aab59a.zip hqemu-40a6238a20134a4687f67072d9be99cd97aab59a.tar.gz |
ide: Split out BMDMA code from ATA core
The ATA core is currently heavily intertwined with BMDMA code. Let's loosen
that a bit, so we can happily replace the DMA backend with different
implementations.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/ide/cmd646.c | 6 | ||||
-rw-r--r-- | hw/ide/core.c | 347 | ||||
-rw-r--r-- | hw/ide/internal.h | 69 | ||||
-rw-r--r-- | hw/ide/pci.c | 280 | ||||
-rw-r--r-- | hw/ide/pci.h | 30 | ||||
-rw-r--r-- | hw/ide/piix.c | 6 | ||||
-rw-r--r-- | hw/ide/via.c | 6 |
7 files changed, 446 insertions, 298 deletions
diff --git a/hw/ide/cmd646.c b/hw/ide/cmd646.c index ea5d2dc..e191ee6 100644 --- a/hw/ide/cmd646.c +++ b/hw/ide/cmd646.c @@ -167,9 +167,10 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num, for(i = 0;i < 2; i++) { BMDMAState *bm = &d->bmdma[i]; - d->bus[i].bmdma = bm; + bmdma_init(&d->bus[i], bm); bm->bus = d->bus+i; - qemu_add_vm_change_state_handler(ide_dma_restart_cb, bm); + qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb, + &bm->dma); if (i == 0) { register_ioport_write(addr, 4, 1, bmdma_writeb_0, d); @@ -218,7 +219,6 @@ static void cmd646_reset(void *opaque) for (i = 0; i < 2; i++) { ide_bus_reset(&d->bus[i]); - ide_dma_reset(&d->bmdma[i]); } } diff --git a/hw/ide/core.c b/hw/ide/core.c index ed6854d..2032e20 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -34,8 +34,6 @@ #include <hw/ide/internal.h> -#define IDE_PAGE_SIZE 4096 - static const int smart_attributes[][5] = { /* id, flags, val, wrst, thrsh */ { 0x01, 0x03, 0x64, 0x64, 0x06}, /* raw read */ @@ -61,11 +59,8 @@ static inline int media_is_cd(IDEState *s) return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); } -static void ide_dma_start(IDEState *s, BlockDriverCompletionFunc *dma_cb); -static void ide_dma_restart(IDEState *s, int is_read); static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); static int ide_handle_rw_error(IDEState *s, int error, int op); -static void ide_flush_cache(IDEState *s); static void padstr(char *str, const char *src, int len) { @@ -314,11 +309,11 @@ static inline void ide_abort_command(IDEState *s) } static inline void ide_dma_submit_check(IDEState *s, - BlockDriverCompletionFunc *dma_cb, BMDMAState *bm) + BlockDriverCompletionFunc *dma_cb) { - if (bm->aiocb) + if (s->bus->dma->aiocb) return; - dma_cb(bm, -1); + dma_cb(s, -1); } /* prepare data transfer and tell what to do after */ @@ -328,8 +323,10 @@ static void ide_transfer_start(IDEState *s, uint8_t *buf, int size, s->end_transfer_func = end_transfer_func; s->data_ptr = buf; s->data_end = buf + size; - if (!(s->status & ERR_STAT)) + if (!(s->status & ERR_STAT)) { s->status |= DRQ_STAT; + } + s->bus->dma->ops->start_transfer(s->bus->dma); } static void ide_transfer_stop(IDEState *s) @@ -394,7 +391,7 @@ static void ide_rw_error(IDEState *s) { ide_set_irq(s->bus); } -static void ide_sector_read(IDEState *s) +void ide_sector_read(IDEState *s) { int64_t sector_num; int ret, n; @@ -427,58 +424,15 @@ static void ide_sector_read(IDEState *s) } } - -/* return 0 if buffer completed */ -static int dma_buf_prepare(BMDMAState *bm, int is_write) -{ - IDEState *s = bmdma_active_if(bm); - struct { - uint32_t addr; - uint32_t size; - } prd; - int l, len; - - qemu_sglist_init(&s->sg, s->nsector / (IDE_PAGE_SIZE / 512) + 1); - s->io_buffer_size = 0; - for(;;) { - if (bm->cur_prd_len == 0) { - /* end of table (with a fail safe of one page) */ - if (bm->cur_prd_last || - (bm->cur_addr - bm->addr) >= IDE_PAGE_SIZE) - return s->io_buffer_size != 0; - cpu_physical_memory_read(bm->cur_addr, (uint8_t *)&prd, 8); - bm->cur_addr += 8; - prd.addr = le32_to_cpu(prd.addr); - prd.size = le32_to_cpu(prd.size); - len = prd.size & 0xfffe; - if (len == 0) - len = 0x10000; - bm->cur_prd_len = len; - bm->cur_prd_addr = prd.addr; - bm->cur_prd_last = (prd.size & 0x80000000); - } - l = bm->cur_prd_len; - if (l > 0) { - qemu_sglist_add(&s->sg, bm->cur_prd_addr, l); - bm->cur_prd_addr += l; - bm->cur_prd_len -= l; - s->io_buffer_size += l; - } - } - return 1; -} - static void dma_buf_commit(IDEState *s, int is_write) { qemu_sglist_destroy(&s->sg); } -static void ide_dma_set_inactive(BMDMAState *bm) +static void ide_set_inactive(IDEState *s) { - bm->status &= ~BM_STATUS_DMAING; - bm->dma_cb = NULL; - bm->unit = -1; - bm->aiocb = NULL; + s->bus->dma->aiocb = NULL; + s->bus->dma->ops->set_inactive(s->bus->dma); } void ide_dma_error(IDEState *s) @@ -486,8 +440,8 @@ void ide_dma_error(IDEState *s) ide_transfer_stop(s); s->error = ABRT_ERR; s->status = READY_STAT | ERR_STAT; - ide_dma_set_inactive(s->bus->bmdma); - s->bus->bmdma->status |= BM_STATUS_INT; + ide_set_inactive(s); + s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_INT); ide_set_irq(s->bus); } @@ -503,8 +457,8 @@ static int ide_handle_rw_error(IDEState *s, int error, int op) if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC) || action == BLOCK_ERR_STOP_ANY) { - s->bus->bmdma->unit = s->unit; - s->bus->bmdma->status |= op; + s->bus->dma->ops->set_unit(s->bus->dma, s->unit); + s->bus->dma->ops->add_status(s->bus->dma, op); bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); vm_stop(0); } else { @@ -520,58 +474,9 @@ static int ide_handle_rw_error(IDEState *s, int error, int op) return 1; } -/* return 0 if buffer completed */ -static int dma_buf_rw(BMDMAState *bm, int is_write) +void ide_read_dma_cb(void *opaque, int ret) { - IDEState *s = bmdma_active_if(bm); - struct { - uint32_t addr; - uint32_t size; - } prd; - int l, len; - - for(;;) { - l = s->io_buffer_size - s->io_buffer_index; - if (l <= 0) - break; - if (bm->cur_prd_len == 0) { - /* end of table (with a fail safe of one page) */ - if (bm->cur_prd_last || - (bm->cur_addr - bm->addr) >= IDE_PAGE_SIZE) - return 0; - cpu_physical_memory_read(bm->cur_addr, (uint8_t *)&prd, 8); - bm->cur_addr += 8; - prd.addr = le32_to_cpu(prd.addr); - prd.size = le32_to_cpu(prd.size); - len = prd.size & 0xfffe; - if (len == 0) - len = 0x10000; - bm->cur_prd_len = len; - bm->cur_prd_addr = prd.addr; - bm->cur_prd_last = (prd.size & 0x80000000); - } - if (l > bm->cur_prd_len) - l = bm->cur_prd_len; - if (l > 0) { - if (is_write) { - cpu_physical_memory_write(bm->cur_prd_addr, - s->io_buffer + s->io_buffer_index, l); - } else { - cpu_physical_memory_read(bm->cur_prd_addr, - s->io_buffer + s->io_buffer_index, l); - } - bm->cur_prd_addr += l; - bm->cur_prd_len -= l; - s->io_buffer_index += l; - } - } - return 1; -} - -static void ide_read_dma_cb(void *opaque, int ret) -{ - BMDMAState *bm = opaque; - IDEState *s = bmdma_active_if(bm); + IDEState *s = opaque; int n; int64_t sector_num; @@ -597,8 +502,8 @@ static void ide_read_dma_cb(void *opaque, int ret) s->status = READY_STAT | SEEK_STAT; ide_set_irq(s->bus); eot: - bm->status |= BM_STATUS_INT; - ide_dma_set_inactive(bm); + s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_INT); + ide_set_inactive(s); return; } @@ -606,13 +511,13 @@ static void ide_read_dma_cb(void *opaque, int ret) n = s->nsector; s->io_buffer_index = 0; s->io_buffer_size = n * 512; - if (dma_buf_prepare(bm, 1) == 0) + if (s->bus->dma->ops->prepare_buf(s->bus->dma, 1) == 0) goto eot; #ifdef DEBUG_AIO printf("aio_read: sector_num=%" PRId64 " n=%d\n", sector_num, n); #endif - bm->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num, ide_read_dma_cb, bm); - ide_dma_submit_check(s, ide_read_dma_cb, bm); + s->bus->dma->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num, ide_read_dma_cb, s); + ide_dma_submit_check(s, ide_read_dma_cb); } static void ide_sector_read_dma(IDEState *s) @@ -621,7 +526,7 @@ static void ide_sector_read_dma(IDEState *s) s->io_buffer_index = 0; s->io_buffer_size = 0; s->is_read = 1; - ide_dma_start(s, ide_read_dma_cb); + s->bus->dma->ops->start_dma(s->bus->dma, s, ide_read_dma_cb); } static void ide_sector_write_timer_cb(void *opaque) @@ -630,7 +535,7 @@ static void ide_sector_write_timer_cb(void *opaque) ide_set_irq(s->bus); } -static void ide_sector_write(IDEState *s) +void ide_sector_write(IDEState *s) { int64_t sector_num; int ret, n, n1; @@ -676,48 +581,9 @@ static void ide_sector_write(IDEState *s) } } -static void ide_dma_restart_bh(void *opaque) +void ide_write_dma_cb(void *opaque, int ret) { - BMDMAState *bm = opaque; - int is_read; - - qemu_bh_delete(bm->bh); - bm->bh = NULL; - - is_read = !!(bm->status & BM_STATUS_RETRY_READ); - - if (bm->status & BM_STATUS_DMA_RETRY) { - bm->status &= ~(BM_STATUS_DMA_RETRY | BM_STATUS_RETRY_READ); - ide_dma_restart(bmdma_active_if(bm), is_read); - } else if (bm->status & BM_STATUS_PIO_RETRY) { - bm->status &= ~(BM_STATUS_PIO_RETRY | BM_STATUS_RETRY_READ); - if (is_read) { - ide_sector_read(bmdma_active_if(bm)); - } else { - ide_sector_write(bmdma_active_if(bm)); - } - } else if (bm->status & BM_STATUS_RETRY_FLUSH) { - ide_flush_cache(bmdma_active_if(bm)); - } -} - -void ide_dma_restart_cb(void *opaque, int running, int reason) -{ - BMDMAState *bm = opaque; - - if (!running) - return; - - if (!bm->bh) { - bm->bh = qemu_bh_new(ide_dma_restart_bh, bm); - qemu_bh_schedule(bm->bh); - } -} - -static void ide_write_dma_cb(void *opaque, int ret) -{ - BMDMAState *bm = opaque; - IDEState *s = bmdma_active_if(bm); + IDEState *s = opaque; int n; int64_t sector_num; @@ -740,21 +606,21 @@ static void ide_write_dma_cb(void *opaque, int ret) s->status = READY_STAT | SEEK_STAT; ide_set_irq(s->bus); eot: - bm->status |= BM_STATUS_INT; - ide_dma_set_inactive(bm); + s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_INT); + ide_set_inactive(s); return; } n = s->nsector; s->io_buffer_size = n * 512; /* launch next transfer */ - if (dma_buf_prepare(bm, 0) == 0) + if (s->bus->dma->ops->prepare_buf(s->bus->dma, 0) == 0) goto eot; #ifdef DEBUG_AIO printf("aio_write: sector_num=%" PRId64 " n=%d\n", sector_num, n); #endif - bm->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num, ide_write_dma_cb, bm); - ide_dma_submit_check(s, ide_write_dma_cb, bm); + s->bus->dma->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num, ide_write_dma_cb, s); + ide_dma_submit_check(s, ide_write_dma_cb); } static void ide_sector_write_dma(IDEState *s) @@ -763,7 +629,7 @@ static void ide_sector_write_dma(IDEState *s) s->io_buffer_index = 0; s->io_buffer_size = 0; s->is_read = 0; - ide_dma_start(s, ide_write_dma_cb); + s->bus->dma->ops->start_dma(s->bus->dma, s, ide_write_dma_cb); } void ide_atapi_cmd_ok(IDEState *s) @@ -813,7 +679,7 @@ static void ide_flush_cb(void *opaque, int ret) ide_set_irq(s->bus); } -static void ide_flush_cache(IDEState *s) +void ide_flush_cache(IDEState *s) { BlockDriverAIOCB *acb; @@ -1003,7 +869,8 @@ static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) if (s->atapi_dma) { s->status = READY_STAT | SEEK_STAT | DRQ_STAT; - ide_dma_start(s, ide_atapi_cmd_read_dma_cb); + s->bus->dma->ops->start_dma(s->bus->dma, s, + ide_atapi_cmd_read_dma_cb); } else { s->status = READY_STAT | SEEK_STAT; ide_atapi_cmd_reply_end(s); @@ -1029,8 +896,7 @@ static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, /* XXX: handle read errors */ static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) { - BMDMAState *bm = opaque; - IDEState *s = bmdma_active_if(bm); + IDEState *s = opaque; int data_offset, n; if (ret < 0) { @@ -1056,7 +922,7 @@ static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) s->lba += n; } s->packet_transfer_size -= s->io_buffer_size; - if (dma_buf_rw(bm, 1) == 0) + if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) goto eot; } @@ -1065,8 +931,8 @@ static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; ide_set_irq(s->bus); eot: - bm->status |= BM_STATUS_INT; - ide_dma_set_inactive(bm); + s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_INT); + ide_set_inactive(s); return; } @@ -1085,12 +951,13 @@ static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) #ifdef DEBUG_AIO printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); #endif - bm->iov.iov_base = (void *)(s->io_buffer + data_offset); - bm->iov.iov_len = n * 4 * 512; - qemu_iovec_init_external(&bm->qiov, &bm->iov, 1); - bm->aiocb = bdrv_aio_readv(s->bs, (int64_t)s->lba << 2, &bm->qiov, - n * 4, ide_atapi_cmd_read_dma_cb, bm); - if (!bm->aiocb) { + s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); + s->bus->dma->iov.iov_len = n * 4 * 512; + qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); + s->bus->dma->aiocb = bdrv_aio_readv(s->bs, (int64_t)s->lba << 2, + &s->bus->dma->qiov, n * 4, + ide_atapi_cmd_read_dma_cb, s); + if (!s->bus->dma->aiocb) { /* Note: media not present is the most likely case */ ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT); @@ -1111,7 +978,8 @@ static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, /* XXX: check if BUSY_STAT should be set */ s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; - ide_dma_start(s, ide_atapi_cmd_read_dma_cb); + s->bus->dma->ops->start_dma(s->bus->dma, s, + ide_atapi_cmd_read_dma_cb); } static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, @@ -2638,6 +2506,18 @@ void ide_bus_reset(IDEBus *bus) ide_reset(&bus->ifs[0]); ide_reset(&bus->ifs[1]); ide_clear_hob(bus); + + /* pending async DMA */ + if (bus->dma->aiocb) { +#ifdef DEBUG_AIO + printf("aio_cancel\n"); +#endif + bdrv_aio_cancel(bus->dma->aiocb); + bus->dma->aiocb = NULL; + } + + /* reset dma provider too */ + bus->dma->ops->reset(bus->dma); } int ide_init_drive(IDEState *s, BlockDriverState *bs, @@ -2696,6 +2576,7 @@ int ide_init_drive(IDEState *s, BlockDriverState *bs, } else { pstrcpy(s->version, sizeof(s->version), QEMU_VERSION); } + ide_reset(s); bdrv_set_removable(bs, s->drive_kind == IDE_CD); return 0; @@ -2717,6 +2598,42 @@ static void ide_init1(IDEBus *bus, int unit) ide_sector_write_timer_cb, s); } +static void ide_nop_start(IDEDMA *dma, IDEState *s, + BlockDriverCompletionFunc *cb) +{ +} + +static int ide_nop(IDEDMA *dma) +{ + return 0; +} + +static int ide_nop_int(IDEDMA *dma, int x) +{ + return 0; +} + +static void ide_nop_restart(void *opaque, int x, int y) +{ +} + +static const IDEDMAOps ide_dma_nop_ops = { + .start_dma = ide_nop_start, + .start_transfer = ide_nop, + .prepare_buf = ide_nop_int, + .rw_buf = ide_nop_int, + .set_unit = ide_nop_int, + .add_status = ide_nop_int, + .set_inactive = ide_nop, + .restart_cb = ide_nop_restart, + .reset = ide_nop, +}; + +static IDEDMA ide_dma_nop = { + .ops = &ide_dma_nop_ops, + .aiocb = NULL, +}; + void ide_init2(IDEBus *bus, qemu_irq irq) { int i; @@ -2726,6 +2643,7 @@ void ide_init2(IDEBus *bus, qemu_irq irq) ide_reset(&bus->ifs[i]); } bus->irq = irq; + bus->dma = &ide_dma_nop; } /* TODO convert users to qdev and remove */ @@ -2749,6 +2667,7 @@ void ide_init2_with_non_qdev_drives(IDEBus *bus, DriveInfo *hd0, } } bus->irq = irq; + bus->dma = &ide_dma_nop; } void ide_init_ioport(IDEBus *bus, int iobase, int iobase2) @@ -2916,73 +2835,3 @@ const VMStateDescription vmstate_ide_bus = { VMSTATE_END_OF_LIST() } }; - -/***********************************************************/ -/* PCI IDE definitions */ - -static void ide_dma_start(IDEState *s, BlockDriverCompletionFunc *dma_cb) -{ - BMDMAState *bm = s->bus->bmdma; - if(!bm) - return; - bm->unit = s->unit; - bm->dma_cb = dma_cb; - bm->cur_prd_last = 0; - bm->cur_prd_addr = 0; - bm->cur_prd_len = 0; - bm->sector_num = ide_get_sector(s); - bm->nsector = s->nsector; - if (bm->status & BM_STATUS_DMAING) { - bm->dma_cb(bm, 0); - } -} - -static void ide_dma_restart(IDEState *s, int is_read) -{ - BMDMAState *bm = s->bus->bmdma; - ide_set_sector(s, bm->sector_num); - s->io_buffer_index = 0; - s->io_buffer_size = 0; - s->nsector = bm->nsector; - bm->cur_addr = bm->addr; - - if (is_read) { - bm->dma_cb = ide_read_dma_cb; - } else { - bm->dma_cb = ide_write_dma_cb; - } - - ide_dma_start(s, bm->dma_cb); -} - -void ide_dma_cancel(BMDMAState *bm) -{ - if (bm->status & BM_STATUS_DMAING) { - if (bm->aiocb) { -#ifdef DEBUG_AIO - printf("aio_cancel\n"); -#endif - bdrv_aio_cancel(bm->aiocb); - } - - /* cancel DMA request */ - ide_dma_set_inactive(bm); - } -} - -void ide_dma_reset(BMDMAState *bm) -{ -#ifdef DEBUG_IDE - printf("ide: dma_reset\n"); -#endif - ide_dma_cancel(bm); - bm->cmd = 0; - bm->status = 0; - bm->addr = 0; - bm->cur_addr = 0; - bm->cur_prd_last = 0; - bm->cur_prd_addr = 0; - bm->cur_prd_len = 0; - bm->sector_num = 0; - bm->nsector = 0; -} diff --git a/hw/ide/internal.h b/hw/ide/internal.h index 029c76c..aadb505 100644 --- a/hw/ide/internal.h +++ b/hw/ide/internal.h @@ -20,7 +20,8 @@ typedef struct IDEBus IDEBus; typedef struct IDEDevice IDEDevice; typedef struct IDEDeviceInfo IDEDeviceInfo; typedef struct IDEState IDEState; -typedef struct BMDMAState BMDMAState; +typedef struct IDEDMA IDEDMA; +typedef struct IDEDMAOps IDEDMAOps; /* Bits of HD_STATUS */ #define ERR_STAT 0x01 @@ -367,6 +368,11 @@ typedef enum { IDE_HD, IDE_CD, IDE_CFATA } IDEDriveKind; typedef void EndTransferFunc(IDEState *); +typedef void DMAStartFunc(IDEDMA *, IDEState *, BlockDriverCompletionFunc *); +typedef int DMAFunc(IDEDMA *); +typedef int DMAIntFunc(IDEDMA *, int); +typedef void DMARestartFunc(void *, int, int); + /* NOTE: IDEState represents in fact one drive */ struct IDEState { IDEBus *bus; @@ -443,13 +449,32 @@ struct IDEState { uint8_t *smart_selftest_data; }; +struct IDEDMAOps { + DMAStartFunc *start_dma; + DMAFunc *start_transfer; + DMAIntFunc *prepare_buf; + DMAIntFunc *rw_buf; + DMAIntFunc *set_unit; + DMAIntFunc *add_status; + DMAFunc *set_inactive; + DMARestartFunc *restart_cb; + DMAFunc *reset; +}; + +struct IDEDMA { + const struct IDEDMAOps *ops; + struct iovec iov; + QEMUIOVector qiov; + BlockDriverAIOCB *aiocb; +}; + struct IDEBus { BusState qbus; IDEDevice *master; IDEDevice *slave; - BMDMAState *bmdma; IDEState ifs[2]; int bus_id; + IDEDMA *dma; uint8_t unit; uint8_t cmd; qemu_irq irq; @@ -480,46 +505,14 @@ struct IDEDeviceInfo { #define BM_CMD_START 0x01 #define BM_CMD_READ 0x08 -struct BMDMAState { - uint8_t cmd; - uint8_t status; - uint32_t addr; - - IDEBus *bus; - /* current transfer state */ - uint32_t cur_addr; - uint32_t cur_prd_last; - uint32_t cur_prd_addr; - uint32_t cur_prd_len; - uint8_t unit; - BlockDriverCompletionFunc *dma_cb; - BlockDriverAIOCB *aiocb; - struct iovec iov; - QEMUIOVector qiov; - int64_t sector_num; - uint32_t nsector; - IORange addr_ioport; - QEMUBH *bh; -}; - static inline IDEState *idebus_active_if(IDEBus *bus) { return bus->ifs + bus->unit; } -static inline IDEState *bmdma_active_if(BMDMAState *bmdma) -{ - assert(bmdma->unit != (uint8_t)-1); - return bmdma->bus->ifs + bmdma->unit; -} - static inline void ide_set_irq(IDEBus *bus) { - BMDMAState *bm = bus->bmdma; if (!(bus->cmd & IDE_CMD_DISABLE_IRQ)) { - if (bm) { - bm->status |= BM_STATUS_INT; - } qemu_irq_raise(bus->irq); } } @@ -542,10 +535,7 @@ void ide_bus_reset(IDEBus *bus); int64_t ide_get_sector(IDEState *s); void ide_set_sector(IDEState *s, int64_t sector_num); -void ide_dma_cancel(BMDMAState *bm); -void ide_dma_restart_cb(void *opaque, int running, int reason); void ide_dma_error(IDEState *s); -void ide_dma_reset(BMDMAState *bm); void ide_atapi_cmd_ok(IDEState *s); void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc); @@ -568,6 +558,11 @@ void ide_init2_with_non_qdev_drives(IDEBus *bus, DriveInfo *hd0, void ide_init_ioport(IDEBus *bus, int iobase, int iobase2); void ide_exec_cmd(IDEBus *bus, uint32_t val); +void ide_read_dma_cb(void *opaque, int ret); +void ide_write_dma_cb(void *opaque, int ret); +void ide_sector_write(IDEState *s); +void ide_sector_read(IDEState *s); +void ide_flush_cache(IDEState *s); /* hw/ide/qdev.c */ void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id); diff --git a/hw/ide/pci.c b/hw/ide/pci.c index ad406ee..510b2de 100644 --- a/hw/ide/pci.c +++ b/hw/ide/pci.c @@ -33,6 +33,253 @@ #include <hw/ide/pci.h> +#define BMDMA_PAGE_SIZE 4096 + +static void bmdma_start_dma(IDEDMA *dma, IDEState *s, + BlockDriverCompletionFunc *dma_cb) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + + bm->unit = s->unit; + bm->dma_cb = dma_cb; + bm->cur_prd_last = 0; + bm->cur_prd_addr = 0; + bm->cur_prd_len = 0; + bm->sector_num = ide_get_sector(s); + bm->nsector = s->nsector; + + if (bm->status & BM_STATUS_DMAING) { + bm->dma_cb(bmdma_active_if(bm), 0); + } +} + +/* return 0 if buffer completed */ +static int bmdma_prepare_buf(IDEDMA *dma, int is_write) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + IDEState *s = bmdma_active_if(bm); + struct { + uint32_t addr; + uint32_t size; + } prd; + int l, len; + + qemu_sglist_init(&s->sg, s->nsector / (BMDMA_PAGE_SIZE / 512) + 1); + s->io_buffer_size = 0; + for(;;) { + if (bm->cur_prd_len == 0) { + /* end of table (with a fail safe of one page) */ + if (bm->cur_prd_last || + (bm->cur_addr - bm->addr) >= BMDMA_PAGE_SIZE) + return s->io_buffer_size != 0; + cpu_physical_memory_read(bm->cur_addr, (uint8_t *)&prd, 8); + bm->cur_addr += 8; + prd.addr = le32_to_cpu(prd.addr); + prd.size = le32_to_cpu(prd.size); + len = prd.size & 0xfffe; + if (len == 0) + len = 0x10000; + bm->cur_prd_len = len; + bm->cur_prd_addr = prd.addr; + bm->cur_prd_last = (prd.size & 0x80000000); + } + l = bm->cur_prd_len; + if (l > 0) { + qemu_sglist_add(&s->sg, bm->cur_prd_addr, l); + bm->cur_prd_addr += l; + bm->cur_prd_len -= l; + s->io_buffer_size += l; + } + } + return 1; +} + +/* return 0 if buffer completed */ +static int bmdma_rw_buf(IDEDMA *dma, int is_write) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + IDEState *s = bmdma_active_if(bm); + struct { + uint32_t addr; + uint32_t size; + } prd; + int l, len; + + for(;;) { + l = s->io_buffer_size - s->io_buffer_index; + if (l <= 0) + break; + if (bm->cur_prd_len == 0) { + /* end of table (with a fail safe of one page) */ + if (bm->cur_prd_last || + (bm->cur_addr - bm->addr) >= BMDMA_PAGE_SIZE) + return 0; + cpu_physical_memory_read(bm->cur_addr, (uint8_t *)&prd, 8); + bm->cur_addr += 8; + prd.addr = le32_to_cpu(prd.addr); + prd.size = le32_to_cpu(prd.size); + len = prd.size & 0xfffe; + if (len == 0) + len = 0x10000; + bm->cur_prd_len = len; + bm->cur_prd_addr = prd.addr; + bm->cur_prd_last = (prd.size & 0x80000000); + } + if (l > bm->cur_prd_len) + l = bm->cur_prd_len; + if (l > 0) { + if (is_write) { + cpu_physical_memory_write(bm->cur_prd_addr, + s->io_buffer + s->io_buffer_index, l); + } else { + cpu_physical_memory_read(bm->cur_prd_addr, + s->io_buffer + s->io_buffer_index, l); + } + bm->cur_prd_addr += l; + bm->cur_prd_len -= l; + s->io_buffer_index += l; + } + } + return 1; +} + +static int bmdma_set_unit(IDEDMA *dma, int unit) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + bm->unit = unit; + + return 0; +} + +static int bmdma_add_status(IDEDMA *dma, int status) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + bm->status |= status; + + return 0; +} + +static int bmdma_set_inactive(IDEDMA *dma) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + + bm->status &= ~BM_STATUS_DMAING; + bm->dma_cb = NULL; + bm->unit = -1; + + return 0; +} + +static void bmdma_restart_dma(BMDMAState *bm, int is_read) +{ + IDEState *s = bmdma_active_if(bm); + + ide_set_sector(s, bm->sector_num); + s->io_buffer_index = 0; + s->io_buffer_size = 0; + s->nsector = bm->nsector; + bm->cur_addr = bm->addr; + + if (is_read) { + bm->dma_cb = ide_read_dma_cb; + } else { + bm->dma_cb = ide_write_dma_cb; + } + + bmdma_start_dma(&bm->dma, s, bm->dma_cb); +} + +static void bmdma_restart_bh(void *opaque) +{ + BMDMAState *bm = opaque; + int is_read; + + qemu_bh_delete(bm->bh); + bm->bh = NULL; + + is_read = !!(bm->status & BM_STATUS_RETRY_READ); + + if (bm->status & BM_STATUS_DMA_RETRY) { + bm->status &= ~(BM_STATUS_DMA_RETRY | BM_STATUS_RETRY_READ); + bmdma_restart_dma(bm, is_read); + } else if (bm->status & BM_STATUS_PIO_RETRY) { + bm->status &= ~(BM_STATUS_PIO_RETRY | BM_STATUS_RETRY_READ); + if (is_read) { + ide_sector_read(bmdma_active_if(bm)); + } else { + ide_sector_write(bmdma_active_if(bm)); + } + } else if (bm->status & BM_STATUS_RETRY_FLUSH) { + ide_flush_cache(bmdma_active_if(bm)); + } +} + +static void bmdma_restart_cb(void *opaque, int running, int reason) +{ + IDEDMA *dma = opaque; + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + + if (!running) + return; + + if (!bm->bh) { + bm->bh = qemu_bh_new(bmdma_restart_bh, &bm->dma); + qemu_bh_schedule(bm->bh); + } +} + +static void bmdma_cancel(BMDMAState *bm) +{ + if (bm->status & BM_STATUS_DMAING) { + /* cancel DMA request */ + bmdma_set_inactive(&bm->dma); + } +} + +static int bmdma_reset(IDEDMA *dma) +{ + BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); + +#ifdef DEBUG_IDE + printf("ide: dma_reset\n"); +#endif + bmdma_cancel(bm); + bm->cmd = 0; + bm->status = 0; + bm->addr = 0; + bm->cur_addr = 0; + bm->cur_prd_last = 0; + bm->cur_prd_addr = 0; + bm->cur_prd_len = 0; + bm->sector_num = 0; + bm->nsector = 0; + + return 0; +} + +static int bmdma_start_transfer(IDEDMA *dma) +{ + return 0; +} + +static void bmdma_irq(void *opaque, int n, int level) +{ + BMDMAState *bm = opaque; + + if (!level) { + /* pass through lower */ + qemu_set_irq(bm->irq, level); + return; + } + + if (bm) { + bm->status |= BM_STATUS_INT; + } + + /* trigger the real irq */ + qemu_set_irq(bm->irq, level); +} + void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) { BMDMAState *bm = opaque; @@ -55,10 +302,10 @@ void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) * whole DMA operation will be submitted to disk with a single * aio operation with preadv/pwritev. */ - if (bm->aiocb) { + if (bm->bus->dma->aiocb) { qemu_aio_flush(); #ifdef DEBUG_IDE - if (bm->aiocb) + if (bm->bus->dma->aiocb) printf("ide_dma_cancel: aiocb still pending"); if (bm->status & BM_STATUS_DMAING) printf("ide_dma_cancel: BM_STATUS_DMAING still pending"); @@ -70,7 +317,7 @@ void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) bm->status |= BM_STATUS_DMAING; /* start dma transfer if possible */ if (bm->dma_cb) - bm->dma_cb(bm, 0); + bm->dma_cb(bmdma_active_if(bm), 0); } } } @@ -198,3 +445,30 @@ void pci_ide_create_devs(PCIDevice *dev, DriveInfo **hd_table) ide_create_drive(d->bus+bus[i], unit[i], hd_table[i]); } } + +static const struct IDEDMAOps bmdma_ops = { + .start_dma = bmdma_start_dma, + .start_transfer = bmdma_start_transfer, + .prepare_buf = bmdma_prepare_buf, + .rw_buf = bmdma_rw_buf, + .set_unit = bmdma_set_unit, + .add_status = bmdma_add_status, + .set_inactive = bmdma_set_inactive, + .restart_cb = bmdma_restart_cb, + .reset = bmdma_reset, +}; + +void bmdma_init(IDEBus *bus, BMDMAState *bm) +{ + qemu_irq *irq; + + if (bus->dma == &bm->dma) { + return; + } + + bm->dma.ops = &bmdma_ops; + bus->dma = &bm->dma; + bm->irq = bus->irq; + irq = qemu_allocate_irqs(bmdma_irq, bm, 1); + bus->irq = *irq; +} diff --git a/hw/ide/pci.h b/hw/ide/pci.h index b81b26c..cd72cba 100644 --- a/hw/ide/pci.h +++ b/hw/ide/pci.h @@ -3,6 +3,27 @@ #include <hw/ide/internal.h> +typedef struct BMDMAState { + IDEDMA dma; + uint8_t cmd; + uint8_t status; + uint32_t addr; + + IDEBus *bus; + /* current transfer state */ + uint32_t cur_addr; + uint32_t cur_prd_last; + uint32_t cur_prd_addr; + uint32_t cur_prd_len; + uint8_t unit; + BlockDriverCompletionFunc *dma_cb; + int64_t sector_num; + uint32_t nsector; + IORange addr_ioport; + QEMUBH *bh; + qemu_irq irq; +} BMDMAState; + typedef struct PCIIDEState { PCIDevice dev; IDEBus bus[2]; @@ -10,6 +31,15 @@ typedef struct PCIIDEState { uint32_t secondary; /* used only for cmd646 */ } PCIIDEState; + +static inline IDEState *bmdma_active_if(BMDMAState *bmdma) +{ + assert(bmdma->unit != (uint8_t)-1); + return bmdma->bus->ifs + bmdma->unit; +} + + +void bmdma_init(IDEBus *bus, BMDMAState *bm); void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val); extern const IORangeOps bmdma_addr_ioport_ops; void pci_ide_create_devs(PCIDevice *dev, DriveInfo **hd_table); diff --git a/hw/ide/piix.c b/hw/ide/piix.c index 1c0cb0c..a6b5d92 100644 --- a/hw/ide/piix.c +++ b/hw/ide/piix.c @@ -76,9 +76,10 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num, for(i = 0;i < 2; i++) { BMDMAState *bm = &d->bmdma[i]; - d->bus[i].bmdma = bm; + bmdma_init(&d->bus[i], bm); bm->bus = d->bus+i; - qemu_add_vm_change_state_handler(ide_dma_restart_cb, bm); + qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb, + &bm->dma); register_ioport_write(addr, 1, 1, bmdma_cmd_writeb, bm); @@ -99,7 +100,6 @@ static void piix3_reset(void *opaque) for (i = 0; i < 2; i++) { ide_bus_reset(&d->bus[i]); - ide_dma_reset(&d->bmdma[i]); } /* TODO: this is the default. do not override. */ diff --git a/hw/ide/via.c b/hw/ide/via.c index 78857e8..2603110 100644 --- a/hw/ide/via.c +++ b/hw/ide/via.c @@ -78,9 +78,10 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num, for(i = 0;i < 2; i++) { BMDMAState *bm = &d->bmdma[i]; - d->bus[i].bmdma = bm; + bmdma_init(&d->bus[i], bm); bm->bus = d->bus+i; - qemu_add_vm_change_state_handler(ide_dma_restart_cb, bm); + qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb, + &bm->dma); register_ioport_write(addr, 1, 1, bmdma_cmd_writeb, bm); @@ -101,7 +102,6 @@ static void via_reset(void *opaque) for (i = 0; i < 2; i++) { ide_bus_reset(&d->bus[i]); - ide_dma_reset(&d->bmdma[i]); } pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_WAIT); |