diff options
Diffstat (limited to 'hw/ide')
| -rw-r--r-- | hw/ide/ahci.c | 41 | ||||
| -rw-r--r-- | hw/ide/internal.h | 1 |
2 files changed, 35 insertions, 7 deletions
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index efea93f0b4..de580a6eff 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -636,7 +636,7 @@ static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis) } } -static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist) +static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist, int offset) { AHCICmdHdr *cmd = ad->cur_cmd; uint32_t opts = le32_to_cpu(cmd->opts); @@ -647,6 +647,10 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist) uint8_t *prdt; int i; int r = 0; + int sum = 0; + int off_idx = -1; + int off_pos = -1; + int tbl_entry_size; if (!sglist_alloc_hint) { DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts); @@ -669,10 +673,31 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist) /* Get entries in the PRDT, init a qemu sglist accordingly */ if (sglist_alloc_hint > 0) { AHCI_SG *tbl = (AHCI_SG *)prdt; - - qemu_sglist_init(sglist, sglist_alloc_hint, ad->hba->dma); + sum = 0; for (i = 0; i < sglist_alloc_hint; i++) { /* flags_size is zero-based */ + tbl_entry_size = (le32_to_cpu(tbl[i].flags_size) + 1); + if (offset <= (sum + tbl_entry_size)) { + off_idx = i; + off_pos = offset - sum; + break; + } + sum += tbl_entry_size; + } + if ((off_idx == -1) || (off_pos < 0) || (off_pos > tbl_entry_size)) { + DPRINTF(ad->port_no, "%s: Incorrect offset! " + "off_idx: %d, off_pos: %d\n", + __func__, off_idx, off_pos); + r = -1; + goto out; + } + + qemu_sglist_init(sglist, (sglist_alloc_hint - off_idx), ad->hba->dma); + qemu_sglist_add(sglist, le64_to_cpu(tbl[off_idx].addr + off_pos), + le32_to_cpu(tbl[off_idx].flags_size) + 1 - off_pos); + + for (i = off_idx + 1; i < sglist_alloc_hint; i++) { + /* flags_size is zero-based */ qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr), le32_to_cpu(tbl[i].flags_size) + 1); } @@ -745,7 +770,7 @@ static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis, ncq_tfs->lba, ncq_tfs->lba + ncq_tfs->sector_count - 2, s->dev[port].port.ifs[0].nb_sectors - 1); - ahci_populate_sglist(&s->dev[port], &ncq_tfs->sglist); + ahci_populate_sglist(&s->dev[port], &ncq_tfs->sglist, 0); ncq_tfs->tag = tag; switch(ncq_fis->command) { @@ -970,7 +995,7 @@ static int ahci_start_transfer(IDEDMA *dma) goto out; } - if (!ahci_populate_sglist(ad, &s->sg)) { + if (!ahci_populate_sglist(ad, &s->sg, 0)) { has_sglist = 1; } @@ -1015,6 +1040,7 @@ static void ahci_start_dma(IDEDMA *dma, IDEState *s, DPRINTF(ad->port_no, "\n"); ad->dma_cb = dma_cb; ad->dma_status |= BM_STATUS_DMAING; + s->io_buffer_offset = 0; dma_cb(s, 0); } @@ -1023,7 +1049,7 @@ static int ahci_dma_prepare_buf(IDEDMA *dma, int is_write) AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); IDEState *s = &ad->port.ifs[0]; - ahci_populate_sglist(ad, &s->sg); + ahci_populate_sglist(ad, &s->sg, 0); s->io_buffer_size = s->sg.size; DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size); @@ -1037,7 +1063,7 @@ static int ahci_dma_rw_buf(IDEDMA *dma, int is_write) uint8_t *p = s->io_buffer + s->io_buffer_index; int l = s->io_buffer_size - s->io_buffer_index; - if (ahci_populate_sglist(ad, &s->sg)) { + if (ahci_populate_sglist(ad, &s->sg, s->io_buffer_offset)) { return 0; } @@ -1050,6 +1076,7 @@ static int ahci_dma_rw_buf(IDEDMA *dma, int is_write) /* update number of transferred bytes */ ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + l); s->io_buffer_index += l; + s->io_buffer_offset += l; DPRINTF(ad->port_no, "len=%#x\n", l); diff --git a/hw/ide/internal.h b/hw/ide/internal.h index 7170bd9cd0..bf7d313cf4 100644 --- a/hw/ide/internal.h +++ b/hw/ide/internal.h @@ -393,6 +393,7 @@ struct IDEState { struct iovec iov; QEMUIOVector qiov; /* ATA DMA state */ + int io_buffer_offset; int io_buffer_size; QEMUSGList sg; /* PIO transfer handling */ |