C++ DBF_EVENT函数代码示例

/*
 * Set KEKLs
 */
static int tape_3592_kekl_set(struct tape_device *device,
			      struct tape390_kekl_pair *ext_kekls)
{
	struct tape_request *request;
	struct tape3592_kekl_set_order *order;

	DBF_EVENT(6, "tape3592_kekl_set\n");
	if (check_ext_kekl_pair(ext_kekls)) {
		DBF_EVENT(6, "invalid kekls\n");
		return -EINVAL;
	}
	if (tape_3590_mttell(device, 0) != 0)
		return -EBADSLT;
	request = tape_alloc_request(1, sizeof(*order));
	if (IS_ERR(request))
		return PTR_ERR(request);
	order = request->cpdata;
	memset(order, 0, sizeof(*order));
	order->code = 0xe3;
	order->kekls.count = 2;
	ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);
	ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);
	request->op = TO_KEKL_SET;
	tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);

	return tape_do_io_free(device, request);
}

void qdio_allocate_dbf(struct qdio_initialize *init_data,
		       struct qdio_irq *irq_ptr)
{
	char text[20];

	DBF_EVENT("qfmt:%1d", init_data->q_format);
	DBF_HEX(init_data->adapter_name, 8);
	DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
	DBF_HEX(&init_data->qib_param_field, sizeof(void *));
	DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
	DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
	DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
		  init_data->no_output_qs);
	DBF_HEX(&init_data->input_handler, sizeof(void *));
	DBF_HEX(&init_data->output_handler, sizeof(void *));
	DBF_HEX(&init_data->int_parm, sizeof(long));
	DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
	DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
	DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);

	/* allocate trace view for the interface */
	snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
	irq_ptr->debug_area = debug_register(text, 2, 1, 16);
	debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
	debug_set_level(irq_ptr->debug_area, DBF_WARN);
	DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
}

/*
 * This function is called, when no request is outstanding and we get an
 * interrupt
 */
static int
tape_34xx_unsolicited_irq(struct tape_device *device, struct irb *irb)
{
	if (irb->scsw.dstat == 0x85 /* READY */) {
		/* A medium was inserted in the drive. */
		DBF_EVENT(6, "xuud med\n");
		tape_34xx_delete_sbid_from(device, 0);
		tape_34xx_schedule_work(device, TO_MSEN);
	} else {
		DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
		PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
		tape_dump_sense(device, NULL, irb);
	}
	return TAPE_IO_SUCCESS;
}

/*
 * Disable encryption
 */
static int tape_3592_disable_crypt(struct tape_device *device)
{
	struct tape_request *request;
	char *data;

	DBF_EVENT(6, "tape_3592_disable_crypt\n");
	if (!crypt_supported(device))
		return -ENOSYS;
	request = tape_alloc_request(2, 72);
	if (IS_ERR(request))
		return PTR_ERR(request);
	data = request->cpdata;
	memset(data,0,72);

	data[0]       = 0x05;
	data[36 + 0]  = 0x03;
	data[36 + 1]  = 0x03;
	data[36 + 35] = 0x32;

	request->op = TO_CRYPT_OFF;
	tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
	tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);

	return tape_do_io_free(device, request);
}

static inline int
tape_34xx_erp_succeeded(struct tape_request *request)
{
	DBF_EVENT(3, "Error Recovery successful for %s\n",
		  tape_op_verbose[request->op]);
	return tape_34xx_done(request);
}

static inline int
tape_34xx_erp_failed(struct tape_request *request, int rc)
{
	DBF_EVENT(3, "Error recovery failed for %s (RC=%d)\n",
		  tape_op_verbose[request->op], rc);
	return rc;
}

static void setup_queues(struct qdio_irq *irq_ptr,
			 struct qdio_initialize *qdio_init)
{
	struct qdio_q *q;
	void **input_sbal_array = qdio_init->input_sbal_addr_array;
	void **output_sbal_array = qdio_init->output_sbal_addr_array;
	struct qdio_outbuf_state *output_sbal_state_array =
				  qdio_init->output_sbal_state_array;
	int i;

	for_each_input_queue(irq_ptr, q, i) {
		DBF_EVENT("inq:%1d", i);
		setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);

		q->is_input_q = 1;
		q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
				qdio_init->queue_start_poll_array[i] : NULL;

		setup_storage_lists(q, irq_ptr, input_sbal_array, i);
		input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;

		if (is_thinint_irq(irq_ptr)) {
			tasklet_init(&q->tasklet, tiqdio_inbound_processing,
				     (unsigned long) q);
		} else {
			tasklet_init(&q->tasklet, qdio_inbound_processing,
				     (unsigned long) q);
		}
	}

/*
 * IOCTL: Query KEKLs
 */
static int tape_3592_ioctl_kekl_query(struct tape_device *device,
				      unsigned long arg)
{
	int rc;
	struct tape390_kekl_pair *ext_kekls;

	DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");
	if (!crypt_supported(device))
		return -ENOSYS;
	if (!crypt_enabled(device))
		return -EUNATCH;
	ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
	if (!ext_kekls)
		return -ENOMEM;
	rc = tape_3592_kekl_query(device, ext_kekls);
	if (rc != 0)
		goto fail;
	if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {
		rc = -EFAULT;
		goto fail;
	}
	rc = 0;
fail:
	kfree(ext_kekls);
	return rc;
}

static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
                                void **sbals_array, int i)
{
    struct qdio_q *prev;
    int j;

    DBF_HEX(&q, sizeof(void *));
    q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);

    /* fill in sbal */
    for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) {
        q->sbal[j] = *sbals_array++;
        WARN_ON((unsigned long)q->sbal[j] & 0xff);
    }

    /* fill in slib */
    if (i > 0) {
        prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
               : irq_ptr->output_qs[i - 1];
        prev->slib->nsliba = (unsigned long)q->slib;
    }

    q->slib->sla = (unsigned long)q->sl;
    q->slib->slsba = (unsigned long)&q->slsb.val[0];

    /* fill in sl */
    for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
        q->sl->element[j].sbal = (unsigned long)q->sbal[j];

    DBF_EVENT("sl-slsb-sbal");
    DBF_HEX(q->sl, sizeof(void *));
    DBF_HEX(&q->slsb, sizeof(void *));
    DBF_HEX(q->sbal, sizeof(void *));
}

/*
 * Medium sense for 34xx tapes. There is no 'real' medium sense call.
 * So we just do a normal sense.
 */
static void __tape_34xx_medium_sense(struct tape_request *request)
{
	struct tape_device *device = request->device;
	unsigned char *sense;

	if (request->rc == 0) {
		sense = request->cpdata;

		/*
		 * This isn't quite correct. But since INTERVENTION_REQUIRED
		 * means that the drive is 'neither ready nor on-line' it is
		 * only slightly inaccurate to say there is no tape loaded if
		 * the drive isn't online...
		 */
		if (sense[0] & SENSE_INTERVENTION_REQUIRED)
			tape_med_state_set(device, MS_UNLOADED);
		else
			tape_med_state_set(device, MS_LOADED);

		if (sense[1] & SENSE_WRITE_PROTECT)
			device->tape_generic_status |= GMT_WR_PROT(~0);
		else
			device->tape_generic_status &= ~GMT_WR_PROT(~0);
	} else
		DBF_EVENT(4, "tape_34xx: medium sense failed with rc=%d\n",
			request->rc);
	tape_free_request(request);
}

static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device)
{
	struct tape_request *request;
	char *data;

	DBF_EVENT(6, "tape_3592_enable_crypt\n");
	if (!crypt_supported(device))
		return ERR_PTR(-ENOSYS);
	request = tape_alloc_request(2, 72);
	if (IS_ERR(request))
		return request;
	data = request->cpdata;
	memset(data,0,72);

	data[0]       = 0x05;
	data[36 + 0]  = 0x03;
	data[36 + 1]  = 0x03;
	data[36 + 4]  = 0x40;
	data[36 + 6]  = 0x01;
	data[36 + 14] = 0x2f;
	data[36 + 18] = 0xc3;
	data[36 + 35] = 0x72;
	request->op = TO_CRYPT_ON;
	tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
	tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
	return request;
}

/*
 * Tape state functions
 */
void
tape_state_set(struct tape_device *device, enum tape_state newstate)
{
	const char *str;

	if (device->tape_state == TS_NOT_OPER) {
		DBF_EVENT(3, "ts_set err: not oper\n");
		return;
	}
	DBF_EVENT(4, "ts. dev:	%x\n", device->first_minor);
	DBF_EVENT(4, "old ts:\t\n");
	if (device->tape_state < TS_SIZE && device->tape_state >=0 )
		str = tape_state_verbose[device->tape_state];
	else
		str = "UNKNOWN TS";
	DBF_EVENT(4, "%s\n", str);
	DBF_EVENT(4, "new ts:\t\n");
	if (newstate < TS_SIZE && newstate >= 0)
		str = tape_state_verbose[newstate];
	else
		str = "UNKNOWN TS";
	DBF_EVENT(4, "%s\n", str);
	device->tape_state = newstate;
	wake_up(&device->state_change_wq);
}

static int
dasd_statistics_write(struct file *file, const char __user *user_buf,
		      unsigned long user_len, void *data)
{
#ifdef CONFIG_DASD_PROFILE
	char *buffer, *str;

	if (user_len > 65536)
		user_len = 65536;
	buffer = dasd_get_user_string(user_buf, user_len);
	if (IS_ERR(buffer))
		return PTR_ERR(buffer);
	DBF_EVENT(DBF_DEBUG, "/proc/dasd/statictics: '%s'\n", buffer);

	/* check for valid verbs */
	for (str = buffer; isspace(*str); str++);
	if (strncmp(str, "set", 3) == 0 && isspace(str[3])) {
		/* 'set xxx' was given */
		for (str = str + 4; isspace(*str); str++);
		if (strcmp(str, "on") == 0) {
			/* switch on statistics profiling */
			dasd_profile_level = DASD_PROFILE_ON;
			pr_info("The statistics feature has been switched "
				"on\n");
		} else if (strcmp(str, "off") == 0) {
			/* switch off and reset statistics profiling */
			memset(&dasd_global_profile,
			       0, sizeof (struct dasd_profile_info_t));
			dasd_profile_level = DASD_PROFILE_OFF;
			pr_info("The statistics feature has been switched "
				"off\n");
		} else
			goto out_error;
	} else if (strncmp(str, "reset", 5) == 0) {
		/* reset the statistics */
		memset(&dasd_global_profile, 0,
		       sizeof (struct dasd_profile_info_t));
		pr_info("The statistics have been reset\n");
	} else
		goto out_error;
	kfree(buffer);
	return user_len;
out_error:
	pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
		str);
	kfree(buffer);
	return -EINVAL;
#else
	pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");
	return user_len;
#endif				/* CONFIG_DASD_PROFILE */
}

    for_each_output_queue(irq_ptr, q, i) {
        DBF_EVENT("outq:%1d", i);
        setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);

        q->is_input_q = 0;
        setup_storage_lists(q, irq_ptr, output_sbal_array, i);
        output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;

        tasklet_init(&q->tasklet, qdio_outbound_processing,
                     (unsigned long) q);
        setup_timer(&q->u.out.timer, (void(*)(unsigned long))
                    &qdio_outbound_timer, (unsigned long)q);
    }

/*
 * IOCTL: Query enryption status
 */
static int tape_3592_ioctl_crypt_query(struct tape_device *device,
				       unsigned long arg)
{
	DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n");
	if (!crypt_supported(device))
		return -ENOSYS;
	tape_3590_sense_medium(device);
	if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device),
		sizeof(TAPE_3590_CRYPT_INFO(device))))
		return -EFAULT;
	else
		return 0;
}