C++ (Cpp) default_process_op Examples

Example #1

File: usb-msc.c Project: KevinOConnor/seabios

// Low-level usb command transmit function.
int
usb_process_op(struct disk_op_s *op)
{
    if (!CONFIG_USB_MSC)
        return 0;

    dprintf(16, "usb_cmd_data id=%p write=%d count=%d buf=%p\n"
            , op->drive_fl, 0, op->count, op->buf_fl);
    struct usbdrive_s *udrive_gf = container_of(
        op->drive_fl, struct usbdrive_s, drive);

    // Setup command block wrapper.
    struct cbw_s cbw;
    memset(&cbw, 0, sizeof(cbw));
    int blocksize = scsi_fill_cmd(op, cbw.CBWCB, USB_CDB_SIZE);
    if (blocksize < 0)
        return default_process_op(op);
    u32 bytes = blocksize * op->count;
    cbw.dCBWSignature = CBW_SIGNATURE;
    cbw.dCBWTag = 999; // XXX
    cbw.dCBWDataTransferLength = bytes;
    cbw.bmCBWFlags = scsi_is_read(op) ? USB_DIR_IN : USB_DIR_OUT;
    cbw.bCBWLUN = GET_GLOBALFLAT(udrive_gf->lun);
    cbw.bCBWCBLength = USB_CDB_SIZE;

    // Transfer cbw to device.
    int ret = usb_msc_send(udrive_gf, USB_DIR_OUT
                           , MAKE_FLATPTR(GET_SEG(SS), &cbw), sizeof(cbw));
    if (ret)
        goto fail;

    // Transfer data to/from device.
    if (bytes) {
        ret = usb_msc_send(udrive_gf, cbw.bmCBWFlags, op->buf_fl, bytes);
        if (ret)
            goto fail;
    }

    // Transfer csw info.
    struct csw_s csw;
    ret = usb_msc_send(udrive_gf, USB_DIR_IN
                       , MAKE_FLATPTR(GET_SEG(SS), &csw), sizeof(csw));
    if (ret)
        goto fail;

    if (!csw.bCSWStatus)
        return DISK_RET_SUCCESS;
    if (csw.bCSWStatus == 2)
        goto fail;

    if (blocksize)
        op->count -= csw.dCSWDataResidue / blocksize;
    return DISK_RET_EBADTRACK;

fail:
    // XXX - reset connection
    dprintf(1, "USB transmission failed\n");
    return DISK_RET_EBADTRACK;
}

Example #2

int
pvscsi_process_op(struct disk_op_s *op)
{
    if (!CONFIG_PVSCSI)
        return DISK_RET_EBADTRACK;
    struct pvscsi_lun_s *plun =
        container_of(op->drive_gf, struct pvscsi_lun_s, drive);
    struct pvscsi_ring_dsc_s *ring_dsc = plun->ring_dsc;
    struct PVSCSIRingsState *s = ring_dsc->ring_state;
    u32 req_entries = s->reqNumEntriesLog2;
    u32 cmp_entries = s->cmpNumEntriesLog2;
    struct PVSCSIRingReqDesc *req;
    struct PVSCSIRingCmpDesc *rsp;
    u32 status;

    if (s->reqProdIdx - s->cmpConsIdx >= 1 << req_entries) {
        dprintf(1, "pvscsi: ring full: reqProdIdx=%d cmpConsIdx=%d\n",
                s->reqProdIdx, s->cmpConsIdx);
        return DISK_RET_EBADTRACK;
    }

    req = ring_dsc->ring_reqs + (s->reqProdIdx & MASK(req_entries));
    int blocksize = scsi_fill_cmd(op, req->cdb, 16);
    if (blocksize < 0)
        return default_process_op(op);
    req->bus = 0;
    req->target = plun->target;
    memset(req->lun, 0, sizeof(req->lun));
    req->lun[1] = plun->lun;
    req->senseLen = 0;
    req->senseAddr = 0;
    req->cdbLen = 16;
    req->vcpuHint = 0;
    req->tag = SIMPLE_QUEUE_TAG;
    req->flags = scsi_is_read(op) ?
        PVSCSI_FLAG_CMD_DIR_TOHOST : PVSCSI_FLAG_CMD_DIR_TODEVICE;
    req->dataLen = op->count * blocksize;
    req->dataAddr = (u32)op->buf_fl;
    s->reqProdIdx = s->reqProdIdx + 1;

    pvscsi_kick_rw_io(plun->iobase);
    pvscsi_wait_intr_cmpl(plun->iobase);

    rsp = ring_dsc->ring_cmps + (s->cmpConsIdx & MASK(cmp_entries));
    status = pvscsi_get_rsp(s, rsp);

    return status == 0 ? DISK_RET_SUCCESS : DISK_RET_EBADTRACK;
}