| // Disk setup and access |
| // |
| // Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2002 MandrakeSoft S.A. |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "biosvar.h" // GET_GLOBAL |
| #include "block.h" // process_op |
| #include "hw/ata.h" // process_ata_op |
| #include "hw/ahci.h" // process_ahci_op |
| #include "hw/esp-scsi.h" // esp_scsi_process_op |
| #include "hw/lsi-scsi.h" // lsi_scsi_process_op |
| #include "hw/megasas.h" // megasas_process_op |
| #include "hw/mpt-scsi.h" // mpt_scsi_process_op |
| #include "hw/pci.h" // pci_bdf_to_bus |
| #include "hw/pvscsi.h" // pvscsi_process_op |
| #include "hw/rtc.h" // rtc_read |
| #include "hw/usb-msc.h" // usb_process_op |
| #include "hw/usb-uas.h" // uas_process_op |
| #include "hw/virtio-blk.h" // process_virtio_blk_op |
| #include "hw/virtio-scsi.h" // virtio_scsi_process_op |
| #include "hw/nvme.h" // nvme_process_op |
| #include "malloc.h" // malloc_low |
| #include "output.h" // dprintf |
| #include "stacks.h" // call32 |
| #include "std/disk.h" // struct dpte_s |
| #include "string.h" // checksum |
| #include "util.h" // process_floppy_op |
| |
| u8 FloppyCount VARFSEG; |
| u8 CDCount; |
| struct drive_s *IDMap[3][BUILD_MAX_EXTDRIVE] VARFSEG; |
| u8 *bounce_buf_fl VARFSEG; |
| |
| struct drive_s * |
| getDrive(u8 exttype, u8 extdriveoffset) |
| { |
| if (extdriveoffset >= ARRAY_SIZE(IDMap[0])) |
| return NULL; |
| return GET_GLOBAL(IDMap[exttype][extdriveoffset]); |
| } |
| |
| int getDriveId(u8 exttype, struct drive_s *drive) |
| { |
| ASSERT32FLAT(); |
| int i; |
| for (i = 0; i < ARRAY_SIZE(IDMap[0]); i++) |
| if (getDrive(exttype, i) == drive) |
| return i; |
| return -1; |
| } |
| |
| int create_bounce_buf(void) |
| { |
| if (bounce_buf_fl) |
| return 0; |
| |
| u8 *buf = malloc_low(CDROM_SECTOR_SIZE); |
| if (!buf) { |
| warn_noalloc(); |
| return -1; |
| } |
| bounce_buf_fl = buf; |
| return 0; |
| } |
| |
| /**************************************************************** |
| * Disk geometry translation |
| ****************************************************************/ |
| |
| static int |
| host_lchs_supplied(struct drive_s *drive) |
| { |
| return (drive->lchs.head <= 255 && |
| drive->lchs.sector > 0 && drive->lchs.sector <= 63); |
| } |
| |
| static u8 |
| get_translation(struct drive_s *drive) |
| { |
| if (host_lchs_supplied(drive)) |
| return TRANSLATION_HOST; |
| u8 type = drive->type; |
| if (CONFIG_QEMU && type == DTYPE_ATA) { |
| // Emulators pass in the translation info via nvram. |
| u8 translation = rtc_read(CMOS_BIOS_DISKTRANSFLAG + drive->cntl_id/4); |
| translation >>= 2 * (drive->cntl_id % 4); |
| translation &= 0x03; |
| return translation; |
| } |
| |
| // Otherwise use a heuristic to determine translation type. |
| u16 heads = drive->pchs.head; |
| u16 cylinders = drive->pchs.cylinder; |
| u16 spt = drive->pchs.sector; |
| u64 sectors = drive->sectors; |
| u64 psectors = (u64)heads * cylinders * spt; |
| if (!heads || !cylinders || !spt || psectors > sectors) |
| // pchs doesn't look valid - use LBA. |
| return TRANSLATION_LBA; |
| |
| if (cylinders <= 1024 && heads <= 16 && spt <= 63) |
| return TRANSLATION_NONE; |
| if (cylinders * heads <= 131072) |
| return TRANSLATION_LARGE; |
| return TRANSLATION_LBA; |
| } |
| |
| static void |
| setup_translation(struct drive_s *drive) |
| { |
| u8 translation = get_translation(drive); |
| drive->translation = translation; |
| |
| u16 heads = drive->pchs.head ; |
| u16 cylinders = drive->pchs.cylinder; |
| u16 spt = drive->pchs.sector; |
| u64 sectors = drive->sectors; |
| const char *desc = NULL; |
| |
| switch (translation) { |
| default: |
| case TRANSLATION_NONE: |
| desc = "none"; |
| break; |
| case TRANSLATION_LBA: |
| desc = "lba"; |
| spt = 63; |
| if (sectors > 63*255*1024) { |
| heads = 255; |
| cylinders = 1024; |
| break; |
| } |
| u32 sect = (u32)sectors / 63; |
| heads = sect / 1024; |
| if (heads>128) |
| heads = 255; |
| else if (heads>64) |
| heads = 128; |
| else if (heads>32) |
| heads = 64; |
| else if (heads>16) |
| heads = 32; |
| else |
| heads = 16; |
| cylinders = sect / heads; |
| break; |
| case TRANSLATION_RECHS: |
| desc = "r-echs"; |
| // Take care not to overflow |
| if (heads==16) { |
| if (cylinders>61439) |
| cylinders=61439; |
| heads=15; |
| cylinders = (u16)((u32)(cylinders)*16/15); |
| } |
| // then go through the large bitshift process |
| case TRANSLATION_LARGE: |
| if (translation == TRANSLATION_LARGE) |
| desc = "large"; |
| while (cylinders > 1024) { |
| cylinders >>= 1; |
| heads <<= 1; |
| |
| // If we max out the head count |
| if (heads > 127) |
| break; |
| } |
| break; |
| case TRANSLATION_HOST: |
| desc = "host-supplied"; |
| cylinders = drive->lchs.cylinder; |
| heads = drive->lchs.head; |
| spt = drive->lchs.sector; |
| break; |
| } |
| // clip to 1024 cylinders in lchs |
| if (cylinders > 1024) |
| cylinders = 1024; |
| dprintf(1, "drive %p: PCHS=%u/%d/%d translation=%s LCHS=%d/%d/%d s=%u\n" |
| , drive |
| , drive->pchs.cylinder, drive->pchs.head, drive->pchs.sector |
| , desc |
| , cylinders, heads, spt |
| , (u32)sectors); |
| |
| drive->lchs.head = heads; |
| drive->lchs.cylinder = cylinders; |
| drive->lchs.sector = spt; |
| } |
| |
| |
| /**************************************************************** |
| * Drive mapping |
| ****************************************************************/ |
| |
| // Fill in Fixed Disk Parameter Table (located in ebda). |
| static void |
| fill_fdpt(struct drive_s *drive, int hdid) |
| { |
| if (hdid > 1) |
| return; |
| |
| u16 nlc = drive->lchs.cylinder; |
| u16 nlh = drive->lchs.head; |
| u16 nls = drive->lchs.sector; |
| |
| u16 npc = drive->pchs.cylinder; |
| u16 nph = drive->pchs.head; |
| u16 nps = drive->pchs.sector; |
| |
| struct fdpt_s *fdpt = &get_ebda_ptr()->fdpt[hdid]; |
| fdpt->precompensation = 0xffff; |
| fdpt->drive_control_byte = 0xc0 | ((nph > 8) << 3); |
| fdpt->landing_zone = npc; |
| fdpt->cylinders = nlc; |
| fdpt->heads = nlh; |
| fdpt->sectors = nls; |
| |
| if (nlc != npc || nlh != nph || nls != nps) { |
| // Logical mapping present - use extended structure. |
| |
| // complies with Phoenix style Translated Fixed Disk Parameter |
| // Table (FDPT) |
| fdpt->phys_cylinders = npc; |
| fdpt->phys_heads = nph; |
| fdpt->phys_sectors = nps; |
| fdpt->a0h_signature = 0xa0; |
| |
| // Checksum structure. |
| fdpt->checksum -= checksum(fdpt, sizeof(*fdpt)); |
| } |
| |
| if (hdid == 0) |
| SET_IVT(0x41, SEGOFF(get_ebda_seg(), offsetof( |
| struct extended_bios_data_area_s, fdpt[0]))); |
| else |
| SET_IVT(0x46, SEGOFF(get_ebda_seg(), offsetof( |
| struct extended_bios_data_area_s, fdpt[1]))); |
| } |
| |
| // Find spot to add a drive |
| static void |
| add_drive(struct drive_s **idmap, u8 *count, struct drive_s *drive) |
| { |
| if (*count >= ARRAY_SIZE(IDMap[0])) { |
| warn_noalloc(); |
| return; |
| } |
| idmap[*count] = drive; |
| *count = *count + 1; |
| } |
| |
| // Map a hard drive |
| void |
| map_hd_drive(struct drive_s *drive) |
| { |
| ASSERT32FLAT(); |
| struct bios_data_area_s *bda = get_bda_ptr(); |
| int hdid = bda->hdcount; |
| dprintf(3, "Mapping hd drive %p to %d\n", drive, hdid); |
| add_drive(IDMap[EXTTYPE_HD], &bda->hdcount, drive); |
| |
| // Setup disk geometry translation. |
| setup_translation(drive); |
| |
| // Fill "fdpt" structure. |
| fill_fdpt(drive, hdid); |
| } |
| |
| // Map a cd |
| void |
| map_cd_drive(struct drive_s *drive) |
| { |
| ASSERT32FLAT(); |
| dprintf(3, "Mapping cd drive %p\n", drive); |
| add_drive(IDMap[EXTTYPE_CD], &CDCount, drive); |
| } |
| |
| // Map a floppy |
| void |
| map_floppy_drive(struct drive_s *drive) |
| { |
| ASSERT32FLAT(); |
| dprintf(3, "Mapping floppy drive %p\n", drive); |
| add_drive(IDMap[EXTTYPE_FLOPPY], &FloppyCount, drive); |
| |
| // Update equipment word bits for floppy |
| if (FloppyCount == 1) { |
| // 1 drive, ready for boot |
| set_equipment_flags(0x41, 0x01); |
| SET_BDA(floppy_harddisk_info, 0x07); |
| } else if (FloppyCount >= 2) { |
| // 2 drives, ready for boot |
| set_equipment_flags(0x41, 0x41); |
| SET_BDA(floppy_harddisk_info, 0x77); |
| } |
| } |
| |
| |
| /**************************************************************** |
| * Extended Disk Drive (EDD) get drive parameters |
| ****************************************************************/ |
| |
| // flags for bus_iface field in fill_generic_edd() |
| #define EDD_ISA 0x01 |
| #define EDD_PCI 0x02 |
| #define EDD_BUS_MASK 0x0f |
| #define EDD_ATA 0x10 |
| #define EDD_SCSI 0x20 |
| #define EDD_IFACE_MASK 0xf0 |
| |
| // Fill in EDD info |
| static int |
| fill_generic_edd(struct segoff_s edd, struct drive_s *drive_fl |
| , u32 dpte_so, u8 bus_iface, u32 iface_path, u32 device_path) |
| { |
| u16 seg = edd.seg; |
| struct int13dpt_s *param_far = (void*)(edd.offset+0); |
| u16 size = GET_FARVAR(seg, param_far->size); |
| u16 t13 = size == 74; |
| |
| // Buffer is too small |
| if (size < 26) |
| return DISK_RET_EPARAM; |
| |
| // EDD 1.x |
| |
| u8 type = GET_FLATPTR(drive_fl->type); |
| u16 npc = GET_FLATPTR(drive_fl->pchs.cylinder); |
| u16 nph = GET_FLATPTR(drive_fl->pchs.head); |
| u16 nps = GET_FLATPTR(drive_fl->pchs.sector); |
| u64 lba = GET_FLATPTR(drive_fl->sectors); |
| u16 blksize = GET_FLATPTR(drive_fl->blksize); |
| |
| dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n" |
| , size, type, npc, nph, nps, (u32)lba, blksize); |
| |
| SET_FARVAR(seg, param_far->size, 26); |
| if (lba == (u64)-1) { |
| // 0x74 = removable, media change, lockable, max values |
| SET_FARVAR(seg, param_far->infos, 0x74); |
| SET_FARVAR(seg, param_far->cylinders, 0xffffffff); |
| SET_FARVAR(seg, param_far->heads, 0xffffffff); |
| SET_FARVAR(seg, param_far->spt, 0xffffffff); |
| } else { |
| if (lba > (u64)nps*nph*0x3fff) { |
| SET_FARVAR(seg, param_far->infos, 0x00); // geometry is invalid |
| SET_FARVAR(seg, param_far->cylinders, 0x3fff); |
| } else { |
| SET_FARVAR(seg, param_far->infos, 0x02); // geometry is valid |
| SET_FARVAR(seg, param_far->cylinders, (u32)npc); |
| } |
| SET_FARVAR(seg, param_far->heads, (u32)nph); |
| SET_FARVAR(seg, param_far->spt, (u32)nps); |
| } |
| SET_FARVAR(seg, param_far->sector_count, lba); |
| SET_FARVAR(seg, param_far->blksize, blksize); |
| |
| if (size < 30 || !dpte_so) |
| return DISK_RET_SUCCESS; |
| |
| // EDD 2.x |
| |
| SET_FARVAR(seg, param_far->size, 30); |
| SET_FARVAR(seg, param_far->dpte.segoff, dpte_so); |
| |
| if (size < 66 || !bus_iface) |
| return DISK_RET_SUCCESS; |
| |
| // EDD 3.x |
| SET_FARVAR(seg, param_far->key, 0xbedd); |
| SET_FARVAR(seg, param_far->dpi_length, t13 ? 44 : 36); |
| SET_FARVAR(seg, param_far->reserved1, 0); |
| SET_FARVAR(seg, param_far->reserved2, 0); |
| |
| const char *host_bus = "ISA "; |
| if ((bus_iface & EDD_BUS_MASK) == EDD_PCI) { |
| host_bus = "PCI "; |
| if (!t13) |
| // Phoenix v3 spec (pre t13) did not define the PCI channel field |
| iface_path &= 0x00ffffff; |
| } |
| memcpy_far(seg, param_far->host_bus, SEG_BIOS, host_bus |
| , sizeof(param_far->host_bus)); |
| SET_FARVAR(seg, param_far->iface_path, iface_path); |
| |
| const char *iface_type = "ATA "; |
| if ((bus_iface & EDD_IFACE_MASK) == EDD_SCSI) |
| iface_type = "SCSI "; |
| memcpy_far(seg, param_far->iface_type, SEG_BIOS, iface_type |
| , sizeof(param_far->iface_type)); |
| if (t13) { |
| SET_FARVAR(seg, param_far->t13.device_path[0], device_path); |
| SET_FARVAR(seg, param_far->t13.device_path[1], 0); |
| |
| SET_FARVAR(seg, param_far->t13.checksum |
| , -checksum_far(seg, (void*)param_far+30, 43)); |
| } else { |
| SET_FARVAR(seg, param_far->phoenix.device_path, device_path); |
| |
| SET_FARVAR(seg, param_far->phoenix.checksum |
| , -checksum_far(seg, (void*)param_far+30, 35)); |
| } |
| |
| return DISK_RET_SUCCESS; |
| } |
| |
| // Build an EDD "iface_path" field for a PCI device |
| static u32 |
| edd_pci_path(u16 bdf, u8 channel) |
| { |
| return (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8) |
| | (pci_bdf_to_fn(bdf) << 16) | ((u32)channel << 24)); |
| } |
| |
| struct dpte_s DefaultDPTE VARLOW; |
| |
| // EDD info for ATA and ATAPI drives |
| static int |
| fill_ata_edd(struct segoff_s edd, struct drive_s *drive_gf) |
| { |
| if (!CONFIG_ATA) |
| return DISK_RET_EPARAM; |
| |
| // Fill in dpte |
| struct atadrive_s *adrive_gf = container_of( |
| drive_gf, struct atadrive_s, drive); |
| struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf); |
| u8 slave = GET_GLOBALFLAT(adrive_gf->slave); |
| u16 iobase2 = GET_GLOBALFLAT(chan_gf->iobase2); |
| u8 irq = GET_GLOBALFLAT(chan_gf->irq); |
| u16 iobase1 = GET_GLOBALFLAT(chan_gf->iobase1); |
| int bdf = GET_GLOBALFLAT(chan_gf->pci_bdf); |
| u8 channel = GET_GLOBALFLAT(chan_gf->chanid); |
| |
| u16 options = 0; |
| if (GET_GLOBALFLAT(drive_gf->type) == DTYPE_ATA) { |
| u8 translation = GET_GLOBALFLAT(drive_gf->translation); |
| if ((translation != TRANSLATION_NONE) && |
| (translation != TRANSLATION_HOST)) { |
| options |= 1<<3; // CHS translation |
| if (translation == TRANSLATION_LBA) |
| options |= 1<<9; |
| if (translation == TRANSLATION_RECHS) |
| options |= 3<<9; |
| } |
| } else { |
| // ATAPI |
| options |= 1<<5; // removable device |
| options |= 1<<6; // atapi device |
| } |
| options |= 1<<4; // lba translation |
| if (CONFIG_ATA_PIO32) |
| options |= 1<<7; |
| |
| SET_LOW(DefaultDPTE.iobase1, iobase1); |
| SET_LOW(DefaultDPTE.iobase2, iobase2 + ATA_CB_DC); |
| SET_LOW(DefaultDPTE.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) |
| | ATA_CB_DH_LBA)); |
| SET_LOW(DefaultDPTE.unused, 0xcb); |
| SET_LOW(DefaultDPTE.irq, irq); |
| SET_LOW(DefaultDPTE.blkcount, 1); |
| SET_LOW(DefaultDPTE.dma, 0); |
| SET_LOW(DefaultDPTE.pio, 0); |
| SET_LOW(DefaultDPTE.options, options); |
| SET_LOW(DefaultDPTE.reserved, 0); |
| SET_LOW(DefaultDPTE.revision, 0x11); |
| |
| u8 sum = checksum_far(SEG_LOW, &DefaultDPTE, 15); |
| SET_LOW(DefaultDPTE.checksum, -sum); |
| |
| u32 bustype = EDD_ISA, ifpath = iobase1; |
| if (bdf >= 0) { |
| bustype = EDD_PCI; |
| ifpath = edd_pci_path(bdf, channel); |
| } |
| return fill_generic_edd( |
| edd, drive_gf, SEGOFF(SEG_LOW, (u32)&DefaultDPTE).segoff |
| , bustype | EDD_ATA, ifpath, slave); |
| } |
| |
| // Fill Extended Disk Drive (EDD) "Get drive parameters" info for a drive |
| int noinline |
| fill_edd(struct segoff_s edd, struct drive_s *drive_fl) |
| { |
| switch (GET_FLATPTR(drive_fl->type)) { |
| case DTYPE_ATA: |
| case DTYPE_ATA_ATAPI: |
| return fill_ata_edd(edd, drive_fl); |
| case DTYPE_VIRTIO_BLK: |
| case DTYPE_VIRTIO_SCSI: |
| return fill_generic_edd( |
| edd, drive_fl, 0xffffffff, EDD_PCI | EDD_SCSI |
| , edd_pci_path(GET_FLATPTR(drive_fl->cntl_id), 0), 0); |
| default: |
| return fill_generic_edd(edd, drive_fl, 0, 0, 0, 0); |
| } |
| } |
| |
| |
| /**************************************************************** |
| * Disk driver dispatch |
| ****************************************************************/ |
| |
| void |
| block_setup(void) |
| { |
| floppy_setup(); |
| ata_setup(); |
| ahci_setup(); |
| sdcard_setup(); |
| ramdisk_setup(); |
| virtio_blk_setup(); |
| virtio_scsi_setup(); |
| lsi_scsi_setup(); |
| esp_scsi_setup(); |
| megasas_setup(); |
| pvscsi_setup(); |
| mpt_scsi_setup(); |
| nvme_setup(); |
| } |
| |
| // Fallback handler for command requests not implemented by drivers |
| int |
| default_process_op(struct disk_op_s *op) |
| { |
| switch (op->command) { |
| case CMD_FORMAT: |
| case CMD_RESET: |
| case CMD_ISREADY: |
| case CMD_VERIFY: |
| case CMD_SEEK: |
| // Return success if the driver doesn't implement these commands |
| return DISK_RET_SUCCESS; |
| default: |
| return DISK_RET_EPARAM; |
| } |
| } |
| |
| // Command dispatch for disk drivers that run in both 16bit and 32bit mode |
| static int |
| process_op_both(struct disk_op_s *op) |
| { |
| switch (GET_FLATPTR(op->drive_fl->type)) { |
| #if CONFIG_PARISC |
| case DTYPE_ATA: |
| return ata_process_op(op); |
| #endif |
| case DTYPE_ATA_ATAPI: |
| return ata_atapi_process_op(op); |
| case DTYPE_USB: |
| return usb_process_op(op); |
| case DTYPE_UAS: |
| return uas_process_op(op); |
| case DTYPE_LSI_SCSI: |
| return lsi_scsi_process_op(op); |
| case DTYPE_ESP_SCSI: |
| return esp_scsi_process_op(op); |
| case DTYPE_MEGASAS: |
| return megasas_process_op(op); |
| case DTYPE_MPT_SCSI: |
| return mpt_scsi_process_op(op); |
| default: |
| if (!MODESEGMENT) |
| return DISK_RET_EPARAM; |
| // In 16bit mode and driver not found - try in 32bit mode |
| return call32(process_op_32, MAKE_FLATPTR(GET_SEG(SS), op) |
| , DISK_RET_EPARAM); |
| } |
| } |
| |
| // Command dispatch for disk drivers that only run in 32bit mode |
| int VISIBLE32FLAT |
| process_op_32(struct disk_op_s *op) |
| { |
| ASSERT32FLAT(); |
| switch (op->drive_fl->type) { |
| case DTYPE_VIRTIO_BLK: |
| return virtio_blk_process_op(op); |
| case DTYPE_AHCI: |
| return ahci_process_op(op); |
| case DTYPE_AHCI_ATAPI: |
| return ahci_atapi_process_op(op); |
| case DTYPE_SDCARD: |
| return sdcard_process_op(op); |
| case DTYPE_USB_32: |
| return usb_process_op(op); |
| case DTYPE_UAS_32: |
| return uas_process_op(op); |
| case DTYPE_VIRTIO_SCSI: |
| return virtio_scsi_process_op(op); |
| case DTYPE_PVSCSI: |
| return pvscsi_process_op(op); |
| case DTYPE_NVME: |
| return nvme_process_op(op); |
| default: |
| return process_op_both(op); |
| } |
| } |
| |
| // Command dispatch for disk drivers that only run in 16bit mode |
| static int |
| process_op_16(struct disk_op_s *op) |
| { |
| ASSERT16(); |
| switch (GET_FLATPTR(op->drive_fl->type)) { |
| case DTYPE_FLOPPY: |
| return floppy_process_op(op); |
| case DTYPE_ATA: |
| return ata_process_op(op); |
| case DTYPE_RAMDISK: |
| return ramdisk_process_op(op); |
| case DTYPE_CDEMU: |
| return cdemu_process_op(op); |
| default: |
| return process_op_both(op); |
| } |
| } |
| |
| // Execute a disk_op_s request. |
| int |
| process_op(struct disk_op_s *op) |
| { |
| if (0) dprintf(DEBUG_HDL_13, "disk_op d=%p lba=%d buf=%p count=%d cmd=%d\n" |
| , op->drive_fl, (u32)op->lba, op->buf_fl |
| , op->count, op->command); |
| |
| int ret, origcount = op->count; |
| /* Only x86 arch has problems with large reads/writes greater than 64kb */ |
| if (CONFIG_X86 && |
| (origcount * GET_FLATPTR(op->drive_fl->blksize) > 64*1024)) { |
| op->count = 0; |
| return DISK_RET_EBOUNDARY; |
| } |
| if (MODESEGMENT) |
| ret = process_op_16(op); |
| else |
| ret = process_op_32(op); |
| if (ret && op->count == origcount) |
| // If the count hasn't changed on error, assume no data transferred. |
| op->count = 0; |
| return ret; |
| } |
