diff options
Diffstat (limited to 'qemu/hw/ide/pci.c')
| -rw-r--r-- | qemu/hw/ide/pci.c | 468 |
1 files changed, 0 insertions, 468 deletions
diff --git a/qemu/hw/ide/pci.c b/qemu/hw/ide/pci.c deleted file mode 100644 index 8d56a00b1..000000000 --- a/qemu/hw/ide/pci.c +++ /dev/null @@ -1,468 +0,0 @@ -/* - * QEMU IDE Emulation: PCI Bus support. - * - * Copyright (c) 2003 Fabrice Bellard - * Copyright (c) 2006 Openedhand Ltd. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "qemu/osdep.h" -#include <hw/hw.h> -#include <hw/i386/pc.h> -#include <hw/pci/pci.h> -#include <hw/isa/isa.h> -#include "sysemu/block-backend.h" -#include "sysemu/dma.h" -#include "qemu/error-report.h" -#include <hw/ide/pci.h> - -#define BMDMA_PAGE_SIZE 4096 - -#define BM_MIGRATION_COMPAT_STATUS_BITS \ - (IDE_RETRY_DMA | IDE_RETRY_PIO | \ - IDE_RETRY_READ | IDE_RETRY_FLUSH) - -static void bmdma_start_dma(IDEDMA *dma, IDEState *s, - BlockCompletionFunc *dma_cb) -{ - BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); - - bm->dma_cb = dma_cb; - bm->cur_prd_last = 0; - bm->cur_prd_addr = 0; - bm->cur_prd_len = 0; - - if (bm->status & BM_STATUS_DMAING) { - bm->dma_cb(bmdma_active_if(bm), 0); - } -} - -/** - * Prepare an sglist based on available PRDs. - * @limit: How many bytes to prepare total. - * - * Returns the number of bytes prepared, -1 on error. - * IDEState.io_buffer_size will contain the number of bytes described - * by the PRDs, whether or not we added them to the sglist. - */ -static int32_t bmdma_prepare_buf(IDEDMA *dma, int32_t limit) -{ - BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); - IDEState *s = bmdma_active_if(bm); - PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev); - struct { - uint32_t addr; - uint32_t size; - } prd; - int l, len; - - pci_dma_sglist_init(&s->sg, pci_dev, - 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->sg.size; - } - pci_dma_read(pci_dev, bm->cur_addr, &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) { - uint64_t sg_len; - - /* Don't add extra bytes to the SGList; consume any remaining - * PRDs from the guest, but ignore them. */ - sg_len = MIN(limit - s->sg.size, bm->cur_prd_len); - if (sg_len) { - qemu_sglist_add(&s->sg, bm->cur_prd_addr, sg_len); - } - - bm->cur_prd_addr += l; - bm->cur_prd_len -= l; - s->io_buffer_size += l; - } - } - - qemu_sglist_destroy(&s->sg); - s->io_buffer_size = 0; - 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); - PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev); - 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; - pci_dma_read(pci_dev, bm->cur_addr, &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) { - pci_dma_write(pci_dev, bm->cur_prd_addr, - s->io_buffer + s->io_buffer_index, l); - } else { - pci_dma_read(pci_dev, 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 bmdma_set_inactive(IDEDMA *dma, bool more) -{ - BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); - - bm->dma_cb = NULL; - if (more) { - bm->status |= BM_STATUS_DMAING; - } else { - bm->status &= ~BM_STATUS_DMAING; - } -} - -static void bmdma_restart_dma(IDEDMA *dma) -{ - BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma); - - bm->cur_addr = bm->addr; -} - -static void bmdma_cancel(BMDMAState *bm) -{ - if (bm->status & BM_STATUS_DMAING) { - /* cancel DMA request */ - bmdma_set_inactive(&bm->dma, false); - } -} - -static void 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; -} - -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; - } - - bm->status |= BM_STATUS_INT; - - /* trigger the real irq */ - qemu_set_irq(bm->irq, level); -} - -void bmdma_cmd_writeb(BMDMAState *bm, uint32_t val) -{ -#ifdef DEBUG_IDE - printf("%s: 0x%08x\n", __func__, val); -#endif - - /* Ignore writes to SSBM if it keeps the old value */ - if ((val & BM_CMD_START) != (bm->cmd & BM_CMD_START)) { - if (!(val & BM_CMD_START)) { - ide_cancel_dma_sync(idebus_active_if(bm->bus)); - bm->status &= ~BM_STATUS_DMAING; - } else { - bm->cur_addr = bm->addr; - if (!(bm->status & BM_STATUS_DMAING)) { - bm->status |= BM_STATUS_DMAING; - /* start dma transfer if possible */ - if (bm->dma_cb) - bm->dma_cb(bmdma_active_if(bm), 0); - } - } - } - - bm->cmd = val & 0x09; -} - -static uint64_t bmdma_addr_read(void *opaque, hwaddr addr, - unsigned width) -{ - BMDMAState *bm = opaque; - uint32_t mask = (1ULL << (width * 8)) - 1; - uint64_t data; - - data = (bm->addr >> (addr * 8)) & mask; -#ifdef DEBUG_IDE - printf("%s: 0x%08x\n", __func__, (unsigned)data); -#endif - return data; -} - -static void bmdma_addr_write(void *opaque, hwaddr addr, - uint64_t data, unsigned width) -{ - BMDMAState *bm = opaque; - int shift = addr * 8; - uint32_t mask = (1ULL << (width * 8)) - 1; - -#ifdef DEBUG_IDE - printf("%s: 0x%08x\n", __func__, (unsigned)data); -#endif - bm->addr &= ~(mask << shift); - bm->addr |= ((data & mask) << shift) & ~3; -} - -MemoryRegionOps bmdma_addr_ioport_ops = { - .read = bmdma_addr_read, - .write = bmdma_addr_write, - .endianness = DEVICE_LITTLE_ENDIAN, -}; - -static bool ide_bmdma_current_needed(void *opaque) -{ - BMDMAState *bm = opaque; - - return (bm->cur_prd_len != 0); -} - -static bool ide_bmdma_status_needed(void *opaque) -{ - BMDMAState *bm = opaque; - - /* Older versions abused some bits in the status register for internal - * error state. If any of these bits are set, we must add a subsection to - * transfer the real status register */ - uint8_t abused_bits = BM_MIGRATION_COMPAT_STATUS_BITS; - - return ((bm->status & abused_bits) != 0); -} - -static void ide_bmdma_pre_save(void *opaque) -{ - BMDMAState *bm = opaque; - uint8_t abused_bits = BM_MIGRATION_COMPAT_STATUS_BITS; - - if (!(bm->status & BM_STATUS_DMAING) && bm->dma_cb) { - bm->bus->error_status = - ide_dma_cmd_to_retry(bmdma_active_if(bm)->dma_cmd); - } - bm->migration_retry_unit = bm->bus->retry_unit; - bm->migration_retry_sector_num = bm->bus->retry_sector_num; - bm->migration_retry_nsector = bm->bus->retry_nsector; - bm->migration_compat_status = - (bm->status & ~abused_bits) | (bm->bus->error_status & abused_bits); -} - -/* This function accesses bm->bus->error_status which is loaded only after - * BMDMA itself. This is why the function is called from ide_pci_post_load - * instead of being registered with VMState where it would run too early. */ -static int ide_bmdma_post_load(void *opaque, int version_id) -{ - BMDMAState *bm = opaque; - uint8_t abused_bits = BM_MIGRATION_COMPAT_STATUS_BITS; - - if (bm->status == 0) { - bm->status = bm->migration_compat_status & ~abused_bits; - bm->bus->error_status |= bm->migration_compat_status & abused_bits; - } - if (bm->bus->error_status) { - bm->bus->retry_sector_num = bm->migration_retry_sector_num; - bm->bus->retry_nsector = bm->migration_retry_nsector; - bm->bus->retry_unit = bm->migration_retry_unit; - } - - return 0; -} - -static const VMStateDescription vmstate_bmdma_current = { - .name = "ide bmdma_current", - .version_id = 1, - .minimum_version_id = 1, - .needed = ide_bmdma_current_needed, - .fields = (VMStateField[]) { - VMSTATE_UINT32(cur_addr, BMDMAState), - VMSTATE_UINT32(cur_prd_last, BMDMAState), - VMSTATE_UINT32(cur_prd_addr, BMDMAState), - VMSTATE_UINT32(cur_prd_len, BMDMAState), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_bmdma_status = { - .name ="ide bmdma/status", - .version_id = 1, - .minimum_version_id = 1, - .needed = ide_bmdma_status_needed, - .fields = (VMStateField[]) { - VMSTATE_UINT8(status, BMDMAState), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_bmdma = { - .name = "ide bmdma", - .version_id = 3, - .minimum_version_id = 0, - .pre_save = ide_bmdma_pre_save, - .fields = (VMStateField[]) { - VMSTATE_UINT8(cmd, BMDMAState), - VMSTATE_UINT8(migration_compat_status, BMDMAState), - VMSTATE_UINT32(addr, BMDMAState), - VMSTATE_INT64(migration_retry_sector_num, BMDMAState), - VMSTATE_UINT32(migration_retry_nsector, BMDMAState), - VMSTATE_UINT8(migration_retry_unit, BMDMAState), - VMSTATE_END_OF_LIST() - }, - .subsections = (const VMStateDescription*[]) { - &vmstate_bmdma_current, - &vmstate_bmdma_status, - NULL - } -}; - -static int ide_pci_post_load(void *opaque, int version_id) -{ - PCIIDEState *d = opaque; - int i; - - for(i = 0; i < 2; i++) { - /* current versions always store 0/1, but older version - stored bigger values. We only need last bit */ - d->bmdma[i].migration_retry_unit &= 1; - ide_bmdma_post_load(&d->bmdma[i], -1); - } - - return 0; -} - -const VMStateDescription vmstate_ide_pci = { - .name = "ide", - .version_id = 3, - .minimum_version_id = 0, - .post_load = ide_pci_post_load, - .fields = (VMStateField[]) { - VMSTATE_PCI_DEVICE(parent_obj, PCIIDEState), - VMSTATE_STRUCT_ARRAY(bmdma, PCIIDEState, 2, 0, - vmstate_bmdma, BMDMAState), - VMSTATE_IDE_BUS_ARRAY(bus, PCIIDEState, 2), - VMSTATE_IDE_DRIVES(bus[0].ifs, PCIIDEState), - VMSTATE_IDE_DRIVES(bus[1].ifs, PCIIDEState), - VMSTATE_END_OF_LIST() - } -}; - -void pci_ide_create_devs(PCIDevice *dev, DriveInfo **hd_table) -{ - PCIIDEState *d = PCI_IDE(dev); - static const int bus[4] = { 0, 0, 1, 1 }; - static const int unit[4] = { 0, 1, 0, 1 }; - int i; - - for (i = 0; i < 4; i++) { - if (hd_table[i] == NULL) - continue; - ide_create_drive(d->bus+bus[i], unit[i], hd_table[i]); - } -} - -static const struct IDEDMAOps bmdma_ops = { - .start_dma = bmdma_start_dma, - .prepare_buf = bmdma_prepare_buf, - .rw_buf = bmdma_rw_buf, - .restart_dma = bmdma_restart_dma, - .set_inactive = bmdma_set_inactive, - .reset = bmdma_reset, -}; - -void bmdma_init(IDEBus *bus, BMDMAState *bm, PCIIDEState *d) -{ - if (bus->dma == &bm->dma) { - return; - } - - bm->dma.ops = &bmdma_ops; - bus->dma = &bm->dma; - bm->irq = bus->irq; - bus->irq = qemu_allocate_irq(bmdma_irq, bm, 0); - bm->pci_dev = d; -} - -static const TypeInfo pci_ide_type_info = { - .name = TYPE_PCI_IDE, - .parent = TYPE_PCI_DEVICE, - .instance_size = sizeof(PCIIDEState), - .abstract = true, -}; - -static void pci_ide_register_types(void) -{ - type_register_static(&pci_ide_type_info); -} - -type_init(pci_ide_register_types) |