ipr.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 2,336 行 · 第 1/5 页

 *
 * Return value:
 * 	none
 **/
static void ipr_log_config_error(struct ipr_ioa_cfg *ioa_cfg,
				 struct ipr_hostrcb *hostrcb)
{
	int errors_logged, i;
	struct ipr_hostrcb_device_data_entry *dev_entry;
	struct ipr_hostrcb_type_03_error *error;

	error = &hostrcb->hcam.u.error.u.type_03_error;
	errors_logged = be32_to_cpu(error->errors_logged);

	ipr_err("Device Errors Detected/Logged: %d/%d\n",
		be32_to_cpu(error->errors_detected), errors_logged);

	dev_entry = error->dev_entry;

	for (i = 0; i < errors_logged; i++, dev_entry++) {
		ipr_err_separator;

		if (dev_entry->dev_res_addr.bus >= IPR_MAX_NUM_BUSES) {
			ipr_err("Device %d: missing\n", i + 1);
		} else {
			ipr_err("Device %d: %d:%d:%d:%d\n", i + 1,
				ioa_cfg->host->host_no, dev_entry->dev_res_addr.bus,
				dev_entry->dev_res_addr.target, dev_entry->dev_res_addr.lun);
		}
		ipr_log_vpd(&dev_entry->dev_vpids, dev_entry->dev_sn);

		ipr_err("-----New Device Information-----\n");
		ipr_log_vpd(&dev_entry->new_dev_vpids, dev_entry->new_dev_sn);

		ipr_err("Cache Directory Card Information:\n");
		ipr_log_vpd(&dev_entry->ioa_last_with_dev_vpids,
			    dev_entry->ioa_last_with_dev_sn);

		ipr_err("Adapter Card Information:\n");
		ipr_log_vpd(&dev_entry->cfc_last_with_dev_vpids,
			    dev_entry->cfc_last_with_dev_sn);

		ipr_err("Additional IOA Data: %08X %08X %08X %08X %08X\n",
			be32_to_cpu(dev_entry->ioa_data[0]),
			be32_to_cpu(dev_entry->ioa_data[1]),
			be32_to_cpu(dev_entry->ioa_data[2]),
			be32_to_cpu(dev_entry->ioa_data[3]),
			be32_to_cpu(dev_entry->ioa_data[4]));
	}
}

/**
 * ipr_log_array_error - Log an array configuration error.
 * @ioa_cfg:	ioa config struct
 * @hostrcb:	hostrcb struct
 *
 * Return value:
 * 	none
 **/
static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
				struct ipr_hostrcb *hostrcb)
{
	int i;
	struct ipr_hostrcb_type_04_error *error;
	struct ipr_hostrcb_array_data_entry *array_entry;
	u8 zero_sn[IPR_SERIAL_NUM_LEN];

	memset(zero_sn, '0', IPR_SERIAL_NUM_LEN);

	error = &hostrcb->hcam.u.error.u.type_04_error;

	ipr_err_separator;

	ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
		error->protection_level,
		ioa_cfg->host->host_no,
		error->last_func_vset_res_addr.bus,
		error->last_func_vset_res_addr.target,
		error->last_func_vset_res_addr.lun);

	ipr_err_separator;

	array_entry = error->array_member;

	for (i = 0; i < 18; i++) {
		if (!memcmp(array_entry->serial_num, zero_sn, IPR_SERIAL_NUM_LEN))
			continue;

		if (error->exposed_mode_adn == i) {
			ipr_err("Exposed Array Member %d:\n", i);
		} else {
			ipr_err("Array Member %d:\n", i);
		}

		ipr_log_vpd(&array_entry->vpids, array_entry->serial_num);

		if (array_entry->dev_res_addr.bus >= IPR_MAX_NUM_BUSES) {
			ipr_err("Current Location: unknown\n");
		} else {
			ipr_err("Current Location: %d:%d:%d:%d\n",
				ioa_cfg->host->host_no,
				array_entry->dev_res_addr.bus,
				array_entry->dev_res_addr.target,
				array_entry->dev_res_addr.lun);
		}

		if (array_entry->dev_res_addr.bus >= IPR_MAX_NUM_BUSES) {
			ipr_err("Expected Location: unknown\n");
		} else {
			ipr_err("Expected Location: %d:%d:%d:%d\n",
				ioa_cfg->host->host_no,
				array_entry->expected_dev_res_addr.bus,
				array_entry->expected_dev_res_addr.target,
				array_entry->expected_dev_res_addr.lun);
		}

		ipr_err_separator;

		if (i == 9)
			array_entry = error->array_member2;
		else
			array_entry++;
	}
}

/**
 * ipr_log_generic_error - Log an adapter error.
 * @ioa_cfg:	ioa config struct
 * @hostrcb:	hostrcb struct
 *
 * Return value:
 * 	none
 **/
static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
				  struct ipr_hostrcb *hostrcb)
{
	int i;
	int ioa_data_len = be32_to_cpu(hostrcb->hcam.length);

	if (ioa_data_len == 0)
		return;

	ipr_err("IOA Error Data:\n");
	ipr_err("Offset    0 1 2 3  4 5 6 7  8 9 A B  C D E F\n");

	for (i = 0; i < ioa_data_len / 4; i += 4) {
		ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
			be32_to_cpu(hostrcb->hcam.u.raw.data[i]),
			be32_to_cpu(hostrcb->hcam.u.raw.data[i+1]),
			be32_to_cpu(hostrcb->hcam.u.raw.data[i+2]),
			be32_to_cpu(hostrcb->hcam.u.raw.data[i+3]));
	}
}

/**
 * ipr_get_error - Find the specfied IOASC in the ipr_error_table.
 * @ioasc:	IOASC
 *
 * This function will return the index of into the ipr_error_table
 * for the specified IOASC. If the IOASC is not in the table,
 * 0 will be returned, which points to the entry used for unknown errors.
 *
 * Return value:
 * 	index into the ipr_error_table
 **/
static u32 ipr_get_error(u32 ioasc)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ipr_error_table); i++)
		if (ipr_error_table[i].ioasc == ioasc)
			return i;

	return 0;
}

/**
 * ipr_handle_log_data - Log an adapter error.
 * @ioa_cfg:	ioa config struct
 * @hostrcb:	hostrcb struct
 *
 * This function logs an adapter error to the system.
 *
 * Return value:
 * 	none
 **/
static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
				struct ipr_hostrcb *hostrcb)
{
	u32 ioasc;
	int error_index;

	if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
		return;

	if (hostrcb->hcam.notifications_lost == IPR_HOST_RCB_NOTIFICATIONS_LOST)
		dev_err(&ioa_cfg->pdev->dev, "Error notifications lost\n");

	ioasc = be32_to_cpu(hostrcb->hcam.u.error.failing_dev_ioasc);

	if (ioasc == IPR_IOASC_BUS_WAS_RESET ||
	    ioasc == IPR_IOASC_BUS_WAS_RESET_BY_OTHER) {
		/* Tell the midlayer we had a bus reset so it will handle the UA properly */
		scsi_report_bus_reset(ioa_cfg->host,
				      hostrcb->hcam.u.error.failing_dev_res_addr.bus);
	}

	error_index = ipr_get_error(ioasc);

	if (!ipr_error_table[error_index].log_hcam)
		return;

	if (ipr_is_device(&hostrcb->hcam.u.error.failing_dev_res_addr)) {
		ipr_res_err(ioa_cfg, hostrcb->hcam.u.error.failing_dev_res_addr,
			    "%s\n", ipr_error_table[error_index].error);
	} else {
		dev_err(&ioa_cfg->pdev->dev, "%s\n",
			ipr_error_table[error_index].error);
	}

	/* Set indication we have logged an error */
	ioa_cfg->errors_logged++;

	if (ioa_cfg->log_level < IPR_DEFAULT_LOG_LEVEL)
		return;

	switch (hostrcb->hcam.overlay_id) {
	case IPR_HOST_RCB_OVERLAY_ID_1:
		ipr_log_generic_error(ioa_cfg, hostrcb);
		break;
	case IPR_HOST_RCB_OVERLAY_ID_2:
		ipr_log_cache_error(ioa_cfg, hostrcb);
		break;
	case IPR_HOST_RCB_OVERLAY_ID_3:
		ipr_log_config_error(ioa_cfg, hostrcb);
		break;
	case IPR_HOST_RCB_OVERLAY_ID_4:
	case IPR_HOST_RCB_OVERLAY_ID_6:
		ipr_log_array_error(ioa_cfg, hostrcb);
		break;
	case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
		ipr_log_generic_error(ioa_cfg, hostrcb);
		break;
	default:
		dev_err(&ioa_cfg->pdev->dev,
			"Unknown error received. Overlay ID: %d\n",
			hostrcb->hcam.overlay_id);
		break;
	}
}

/**
 * ipr_process_error - Op done function for an adapter error log.
 * @ipr_cmd:	ipr command struct
 *
 * This function is the op done function for an error log host
 * controlled async from the adapter. It will log the error and
 * send the HCAM back to the adapter.
 *
 * Return value:
 * 	none
 **/
static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
{
	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
	struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
	u32 ioasc = be32_to_cpu(ipr_cmd->ioasa.ioasc);

	list_del(&hostrcb->queue);
	list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);

	if (!ioasc) {
		ipr_handle_log_data(ioa_cfg, hostrcb);
	} else if (ioasc != IPR_IOASC_IOA_WAS_RESET) {
		dev_err(&ioa_cfg->pdev->dev,
			"Host RCB failed with IOASC: 0x%08X\n", ioasc);
	}

	ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
}

/**
 * ipr_timeout -  An internally generated op has timed out.
 * @ipr_cmd:	ipr command struct
 *
 * This function blocks host requests and initiates an
 * adapter reset.
 *
 * Return value:
 * 	none
 **/
static void ipr_timeout(struct ipr_cmnd *ipr_cmd)
{
	unsigned long lock_flags = 0;
	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;

	ENTER;
	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);

	ioa_cfg->errors_logged++;
	dev_err(&ioa_cfg->pdev->dev,
		"Adapter being reset due to command timeout.\n");

	if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
		ioa_cfg->sdt_state = GET_DUMP;

	if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd)
		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);

	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
	LEAVE;
}

/**
 * ipr_reset_reload - Reset/Reload the IOA
 * @ioa_cfg:		ioa config struct
 * @shutdown_type:	shutdown type
 *
 * This function resets the adapter and re-initializes it.
 * This function assumes that all new host commands have been stopped.
 * Return value:
 * 	SUCCESS / FAILED
 **/
static int ipr_reset_reload(struct ipr_ioa_cfg *ioa_cfg,
			    enum ipr_shutdown_type shutdown_type)
{
	if (!ioa_cfg->in_reset_reload)
		ipr_initiate_ioa_reset(ioa_cfg, shutdown_type);

	spin_unlock_irq(ioa_cfg->host->host_lock);
	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
	spin_lock_irq(ioa_cfg->host->host_lock);

	/* If we got hit with a host reset while we were already resetting
	 the adapter for some reason, and the reset failed. */
	if (ioa_cfg->ioa_is_dead) {
		ipr_trace;
		return FAILED;
	}

	return SUCCESS;
}

/**
 * ipr_find_ses_entry - Find matching SES in SES table
 * @res:	resource entry struct of SES
 *
 * Return value:
 * 	pointer to SES table entry / NULL on failure
 **/
static const struct ipr_ses_table_entry *
ipr_find_ses_entry(struct ipr_resource_entry *res)
{
	int i, j, matches;
	const struct ipr_ses_table_entry *ste = ipr_ses_table;

	for (i = 0; i < ARRAY_SIZE(ipr_ses_table); i++, ste++) {
		for (j = 0, matches = 0; j < IPR_PROD_ID_LEN; j++) {
			if (ste->compare_product_id_byte[j] == 'X') {
				if (res->cfgte.std_inq_data.vpids.product_id[j] == ste->product_id[j])
					matches++;
				else
					break;
			} else
				matches++;
		}

		if (matches == IPR_PROD_ID_LEN)
			return ste;
	}

	return NULL;
}

/**
 * ipr_get_max_scsi_speed - Determine max SCSI speed for a given bus
 * @ioa_cfg:	ioa config struct
 * @bus:		SCSI bus
 * @bus_width:	bus width
 *
 * Return value:
 *	SCSI bus speed in units of 100KHz, 1600 is 160 MHz
 *	For a 2-byte wide SCSI bus, the maximum transfer speed is
 *	twice the maximum transfer rate (e.g. for a wide enabled bus,
 *	max 160MHz = max 320MB/sec).
 **/
static u32 ipr_get_max_scsi_speed(struct ipr_ioa_cfg *ioa_cfg, u8 bus, u8 bus_width)
{
	struct ipr_resource_entry *res;
	const struct ipr_ses_table_entry *ste;
	u32 max_xfer_rate = IPR_MAX_SCSI_RATE(bus_width);

	/* Loop through each config table entry in the config table buffer */
	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
		if (!(IPR_IS_SES_DEVICE(res->cfgte.std_inq_data)))
			continue;

		if (bus != res->cfgte.res_addr.bus)
			continue;

		if (!(ste = ipr_find_ses_entry(res)))
			continue;

		max_xfer_rate = (ste->max_bus_speed_limit * 10) / (bus_width / 8);
	}

	return max_xfer_rate;
}

/**
 * ipr_wait_iodbg_ack - Wait for an IODEBUG ACK from the IOA
 * @ioa_cfg:		ioa config struct
 * @max_delay:		max delay in micro-seconds to wait
 *
 * Waits for an IODEBUG ACK from the IOA, doing busy looping.
 *
 * Return value:
 * 	0 on success / other on failure
 **/
static int ipr_wait_iodbg_ack(struct ipr_ioa_cfg *ioa_cfg, int max_delay)
{
	volatile u32 pcii_reg;
	int delay = 1;

	/* Read interrupt reg until IOA signals IO Debug Acknowledge */
	while (delay < max_delay) {
		pcii_reg = readl(ioa_cfg->regs.sense_interrupt_reg);

		if (pcii_reg & IPR_PCII_IO_DEBUG_ACKNOWLEDGE)
			return 0;

		/* udelay cannot be used if delay is more than a few milliseconds */
		if ((delay / 1000) > MAX_UDELAY_MS)
			mdelay(delay / 1000);
		else
			udelay(delay);

		delay += delay;
	}
	return -EIO;
}

/**
 * ipr_get_ldump_data_section - Dump IOA memory
 * @ioa_cfg:			ioa config struct
 * @start_addr:			adapter address to dump
 * @dest:				destination kernel buffer
 * @length_in_words:	length to dump in 4 byte words
 *
 * Return value:
 * 	0 on success / -EIO on failure
 **/
static int ipr_get_ldump_data_section(struct ipr_ioa_cfg *ioa_cfg,
				      u32 start_addr,
				      u32 *dest, u32 length_in_words)
{
	volatile u32 temp_pcii_reg;
	int i, delay = 0;

	/* Write IOA interrupt reg starting LDUMP state  */
	writel((IPR_UPROCI_RESET_ALERT | IPR_UPROCI_IO_DEBUG_ALERT),
	       ioa_cfg->regs.set_uproc_interrupt_reg);

	/* Wait for IO debug acknowledge */
	if (ipr_wait_iodbg_ack(ioa_cfg,
			       IPR_LDUMP_MAX_LONG_ACK_DELAY_IN_USEC)) {
		dev_err(&ioa_cfg->pdev->dev,
			"IOA dump long data transfer timeout\n");