| // (qemu-emulated) lsi53c895a boot support. |
| // |
| // Copyright (C) 2012 Red Hat Inc. |
| // |
| // Authors: |
| // Gerd Hoffmann <kraxel@redhat.com> |
| // |
| // based on virtio-scsi.c which is written by: |
| // Paolo Bonzini <pbonzini@redhat.com> |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "biosvar.h" // GET_GLOBALFLAT |
| #include "block.h" // struct drive_s |
| #include "blockcmd.h" // scsi_drive_setup |
| #include "config.h" // CONFIG_* |
| #include "byteorder.h" // cpu_to_* |
| #include "fw/paravirt.h" // runningOnQEMU |
| #include "malloc.h" // free |
| #include "output.h" // dprintf |
| #include "pcidevice.h" // foreachpci |
| #include "pci_ids.h" // PCI_DEVICE_ID_VIRTIO_BLK |
| #include "pci_regs.h" // PCI_VENDOR_ID |
| #include "stacks.h" // run_thread |
| #include "std/disk.h" // DISK_RET_SUCCESS |
| #include "string.h" // memset |
| #include "util.h" // usleep |
| |
| #define LSI_REG_DSTAT 0x0c |
| #define LSI_REG_ISTAT0 0x14 |
| #define LSI_REG_DSP0 0x2c |
| #define LSI_REG_DSP1 0x2d |
| #define LSI_REG_DSP2 0x2e |
| #define LSI_REG_DSP3 0x2f |
| #define LSI_REG_SIST0 0x42 |
| #define LSI_REG_SIST1 0x43 |
| |
| #define LSI_ISTAT0_DIP 0x01 |
| #define LSI_ISTAT0_SIP 0x02 |
| #define LSI_ISTAT0_INTF 0x04 |
| #define LSI_ISTAT0_CON 0x08 |
| #define LSI_ISTAT0_SEM 0x10 |
| #define LSI_ISTAT0_SIGP 0x20 |
| #define LSI_ISTAT0_SRST 0x40 |
| #define LSI_ISTAT0_ABRT 0x80 |
| |
| struct lsi_lun_s { |
| struct drive_s drive; |
| struct pci_device *pci; |
| u32 iobase; |
| u8 target; |
| u8 lun; |
| }; |
| |
| int |
| lsi_scsi_process_op(struct disk_op_s *op) |
| { |
| if (!CONFIG_LSI_SCSI) |
| return DISK_RET_EBADTRACK; |
| struct lsi_lun_s *llun_gf = |
| container_of(op->drive_fl, struct lsi_lun_s, drive); |
| u16 target = GET_GLOBALFLAT(llun_gf->target); |
| u16 lun = GET_GLOBALFLAT(llun_gf->lun); |
| u8 cdbcmd[16]; |
| int blocksize = scsi_fill_cmd(op, cdbcmd, sizeof(cdbcmd)); |
| if (blocksize < 0) |
| return default_process_op(op); |
| u32 iobase = GET_GLOBALFLAT(llun_gf->iobase); |
| u32 dma = ((scsi_is_read(op) ? 0x01000000 : 0x00000000) | |
| (op->count * blocksize)); |
| u8 msgout[] = { |
| 0x80 | lun, // select lun |
| 0x08, |
| }; |
| u8 status = 0xff; |
| u8 msgin_tmp[2]; |
| u8 msgin = 0xff; |
| |
| u32 script[] = { |
| /* select target, send scsi command */ |
| 0x40000000 | target << 16, // select target |
| 0x00000000, |
| 0x06000001, // msgout |
| (u32)MAKE_FLATPTR(GET_SEG(SS), &msgout), |
| 0x02000010, // scsi command |
| (u32)MAKE_FLATPTR(GET_SEG(SS), cdbcmd), |
| |
| /* handle disconnect */ |
| 0x87820000, // phase == msgin ? |
| 0x00000018, |
| 0x07000002, // msgin |
| (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp), |
| 0x50000000, // re-select |
| 0x00000000, |
| 0x07000002, // msgin |
| (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp), |
| |
| /* dma data, get status, raise irq */ |
| dma, // dma data |
| (u32)op->buf_fl, |
| 0x03000001, // status |
| (u32)MAKE_FLATPTR(GET_SEG(SS), &status), |
| 0x07000001, // msgin |
| (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin), |
| 0x98080000, // dma irq |
| 0x00000000, |
| }; |
| u32 dsp = (u32)MAKE_FLATPTR(GET_SEG(SS), &script); |
| |
| /* convert to little endian for PCI */ |
| convert_to_le32(script, sizeof(script)); |
| |
| outb(dsp & 0xff, iobase + LSI_REG_DSP0); |
| outb((dsp >> 8) & 0xff, iobase + LSI_REG_DSP1); |
| outb((dsp >> 16) & 0xff, iobase + LSI_REG_DSP2); |
| outb((dsp >> 24) & 0xff, iobase + LSI_REG_DSP3); |
| |
| for (;;) { |
| u8 dstat = inb(iobase + LSI_REG_DSTAT); |
| u8 sist0 = inb(iobase + LSI_REG_SIST0); |
| u8 sist1 = inb(iobase + LSI_REG_SIST1); |
| if (sist0 || sist1) { |
| goto fail; |
| } |
| if (dstat & 0x04) { |
| break; |
| } |
| usleep(5); |
| } |
| |
| if (msgin == 0 && status == 0) { |
| return DISK_RET_SUCCESS; |
| } |
| |
| fail: |
| return DISK_RET_EBADTRACK; |
| } |
| |
| static void |
| lsi_scsi_init_lun(struct lsi_lun_s *llun, struct pci_device *pci, u32 iobase, |
| u8 target, u8 lun) |
| { |
| memset(llun, 0, sizeof(*llun)); |
| llun->drive.type = DTYPE_LSI_SCSI; |
| llun->drive.max_bytes_transfer = 4*1024*1024; /* 4 MB */ |
| llun->drive.cntl_id = pci->bdf; |
| llun->pci = pci; |
| llun->target = target; |
| llun->lun = lun; |
| llun->iobase = iobase; |
| } |
| |
| static int |
| lsi_scsi_add_lun(u32 lun, struct drive_s *tmpl_drv) |
| { |
| struct lsi_lun_s *tmpl_llun = |
| container_of(tmpl_drv, struct lsi_lun_s, drive); |
| struct lsi_lun_s *llun = malloc_fseg(sizeof(*llun)); |
| if (!llun) { |
| warn_noalloc(); |
| return -1; |
| } |
| lsi_scsi_init_lun(llun, tmpl_llun->pci, tmpl_llun->iobase, |
| tmpl_llun->target, lun); |
| |
| boot_lchs_find_scsi_device(llun->pci, llun->target, llun->lun, |
| &(llun->drive.lchs)); |
| char *name = znprintf(MAXDESCSIZE, "lsi %pP %d:%d", |
| llun->pci, llun->target, llun->lun); |
| int prio = bootprio_find_scsi_device(llun->pci, llun->target, llun->lun); |
| int ret = scsi_drive_setup(&llun->drive, name, prio, llun->target, llun->lun); |
| free(name); |
| if (ret) |
| goto fail; |
| return 0; |
| |
| fail: |
| free(llun); |
| return -1; |
| } |
| |
| static void |
| lsi_scsi_scan_target(struct pci_device *pci, u32 iobase, u8 target) |
| { |
| struct lsi_lun_s llun0; |
| |
| lsi_scsi_init_lun(&llun0, pci, iobase, target, 0); |
| |
| if (scsi_rep_luns_scan(&llun0.drive, lsi_scsi_add_lun) < 0) |
| scsi_sequential_scan(&llun0.drive, 8, lsi_scsi_add_lun); |
| } |
| |
| static void |
| init_lsi_scsi(void *data) |
| { |
| struct pci_device *pci = data; |
| u32 iobase = pci_enable_iobar(pci, PCI_BASE_ADDRESS_0); |
| if (!iobase) |
| return; |
| pci_enable_busmaster(pci); |
| |
| dprintf(1, "found lsi53c895a at %pP, io @ %x\n", pci, iobase); |
| |
| // reset |
| outb(LSI_ISTAT0_SRST, iobase + LSI_REG_ISTAT0); |
| |
| int i; |
| for (i = 0; i < 7; i++) |
| lsi_scsi_scan_target(pci, iobase, i); |
| } |
| |
| void |
| lsi_scsi_setup(void) |
| { |
| ASSERT32FLAT(); |
| if (!CONFIG_LSI_SCSI || !runningOnQEMU()) |
| return; |
| |
| dprintf(3, "init lsi53c895a\n"); |
| |
| struct pci_device *pci; |
| foreachpci(pci) { |
| if (pci->vendor != PCI_VENDOR_ID_LSI_LOGIC |
| || pci->device != PCI_DEVICE_ID_LSI_53C895A) |
| continue; |
| run_thread(init_lsi_scsi, pci); |
| } |
| } |
