linit.c

来自「linux 内核源代码」· C语言 代码 · 共 1,201 行 · 第 1/3 页

static int aac_slave_configure(struct scsi_device *sdev)
{
	if ((sdev->type == TYPE_DISK) &&
			(sdev_channel(sdev) != CONTAINER_CHANNEL)) {
		if (expose_physicals == 0)
			return -ENXIO;
		if (expose_physicals < 0) {
			struct aac_dev *aac =
				(struct aac_dev *)sdev->host->hostdata;
			if (!aac->raid_scsi_mode || (sdev_channel(sdev) != 2))
				sdev->no_uld_attach = 1;
		}
	}
	if (sdev->tagged_supported && (sdev->type == TYPE_DISK) &&
			(sdev_channel(sdev) == CONTAINER_CHANNEL)) {
		struct scsi_device * dev;
		struct Scsi_Host *host = sdev->host;
		unsigned num_lsu = 0;
		unsigned num_one = 0;
		unsigned depth;

		__shost_for_each_device(dev, host) {
			if (dev->tagged_supported && (dev->type == TYPE_DISK) &&
				(sdev_channel(dev) == CONTAINER_CHANNEL))
				++num_lsu;
			else
				++num_one;
		}
		if (num_lsu == 0)
			++num_lsu;
		depth = (host->can_queue - num_one) / num_lsu;
		if (depth > 256)
			depth = 256;
		else if (depth < 2)
			depth = 2;
		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
		if (!(((struct aac_dev *)host->hostdata)->adapter_info.options &
				AAC_OPT_NEW_COMM))
			blk_queue_max_segment_size(sdev->request_queue, 65536);
	} else
		scsi_adjust_queue_depth(sdev, 0, 1);

	return 0;
}

/**
 *	aac_change_queue_depth		-	alter queue depths
 *	@sdev:	SCSI device we are considering
 *	@depth:	desired queue depth
 *
 *	Alters queue depths for target device based on the host adapter's
 *	total capacity and the queue depth supported by the target device.
 */

static int aac_change_queue_depth(struct scsi_device *sdev, int depth)
{
	if (sdev->tagged_supported && (sdev->type == TYPE_DISK) &&
	    (sdev_channel(sdev) == CONTAINER_CHANNEL)) {
		struct scsi_device * dev;
		struct Scsi_Host *host = sdev->host;
		unsigned num = 0;

		__shost_for_each_device(dev, host) {
			if (dev->tagged_supported && (dev->type == TYPE_DISK) &&
			    (sdev_channel(dev) == CONTAINER_CHANNEL))
				++num;
			++num;
		}
		if (num >= host->can_queue)
			num = host->can_queue - 1;
		if (depth > (host->can_queue - num))
			depth = host->can_queue - num;
		if (depth > 256)
			depth = 256;
		else if (depth < 2)
			depth = 2;
		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
	} else
		scsi_adjust_queue_depth(sdev, 0, 1);
	return sdev->queue_depth;
}

static int aac_ioctl(struct scsi_device *sdev, int cmd, void __user * arg)
{
	struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
	return aac_do_ioctl(dev, cmd, arg);
}

static int aac_eh_abort(struct scsi_cmnd* cmd)
{
	struct scsi_device * dev = cmd->device;
	struct Scsi_Host * host = dev->host;
	struct aac_dev * aac = (struct aac_dev *)host->hostdata;
	int count;
	int ret = FAILED;

	printk(KERN_ERR "%s: Host adapter abort request (%d,%d,%d,%d)\n",
		AAC_DRIVERNAME,
		host->host_no, sdev_channel(dev), sdev_id(dev), dev->lun);
	switch (cmd->cmnd[0]) {
	case SERVICE_ACTION_IN:
		if (!(aac->raw_io_interface) ||
		    !(aac->raw_io_64) ||
		    ((cmd->cmnd[1] & 0x1f) != SAI_READ_CAPACITY_16))
			break;
	case INQUIRY:
	case READ_CAPACITY:
	case TEST_UNIT_READY:
		/* Mark associated FIB to not complete, eh handler does this */
		for (count = 0; count < (host->can_queue + AAC_NUM_MGT_FIB); ++count) {
			struct fib * fib = &aac->fibs[count];
			if (fib->hw_fib_va->header.XferState &&
			  (fib->callback_data == cmd)) {
				fib->flags |= FIB_CONTEXT_FLAG_TIMED_OUT;
				cmd->SCp.phase = AAC_OWNER_ERROR_HANDLER;
				ret = SUCCESS;
			}
		}
	}
	return ret;
}

/*
 *	aac_eh_reset	- Reset command handling
 *	@scsi_cmd:	SCSI command block causing the reset
 *
 */
static int aac_eh_reset(struct scsi_cmnd* cmd)
{
	struct scsi_device * dev = cmd->device;
	struct Scsi_Host * host = dev->host;
	struct scsi_cmnd * command;
	int count;
	struct aac_dev * aac = (struct aac_dev *)host->hostdata;
	unsigned long flags;

	/* Mark the associated FIB to not complete, eh handler does this */
	for (count = 0; count < (host->can_queue + AAC_NUM_MGT_FIB); ++count) {
		struct fib * fib = &aac->fibs[count];
		if (fib->hw_fib_va->header.XferState &&
		  (fib->callback_data == cmd)) {
			fib->flags |= FIB_CONTEXT_FLAG_TIMED_OUT;
			cmd->SCp.phase = AAC_OWNER_ERROR_HANDLER;
		}
	}
	printk(KERN_ERR "%s: Host adapter reset request. SCSI hang ?\n", 
					AAC_DRIVERNAME);

	if ((count = aac_check_health(aac)))
		return count;
	/*
	 * Wait for all commands to complete to this specific
	 * target (block maximum 60 seconds).
	 */
	for (count = 60; count; --count) {
		int active = aac->in_reset;

		if (active == 0)
		__shost_for_each_device(dev, host) {
			spin_lock_irqsave(&dev->list_lock, flags);
			list_for_each_entry(command, &dev->cmd_list, list) {
				if ((command != cmd) &&
				    (command->SCp.phase == AAC_OWNER_FIRMWARE)) {
					active++;
					break;
				}
			}
			spin_unlock_irqrestore(&dev->list_lock, flags);
			if (active)
				break;

		}
		/*
		 * We can exit If all the commands are complete
		 */
		if (active == 0)
			return SUCCESS;
		ssleep(1);
	}
	printk(KERN_ERR "%s: SCSI bus appears hung\n", AAC_DRIVERNAME);
	/*
	 * This adapter needs a blind reset, only do so for Adapters that
	 * support a register, instead of a commanded, reset.
	 */
	if ((aac->supplement_adapter_info.SupportedOptions2 &
	  le32_to_cpu(AAC_OPTION_MU_RESET|AAC_OPTION_IGNORE_RESET)) ==
	  le32_to_cpu(AAC_OPTION_MU_RESET))
		aac_reset_adapter(aac, 2); /* Bypass wait for command quiesce */
	return SUCCESS; /* Cause an immediate retry of the command with a ten second delay after successful tur */
}

/**
 *	aac_cfg_open		-	open a configuration file
 *	@inode: inode being opened
 *	@file: file handle attached
 *
 *	Called when the configuration device is opened. Does the needed
 *	set up on the handle and then returns
 *
 *	Bugs: This needs extending to check a given adapter is present
 *	so we can support hot plugging, and to ref count adapters.
 */

static int aac_cfg_open(struct inode *inode, struct file *file)
{
	struct aac_dev *aac;
	unsigned minor_number = iminor(inode);
	int err = -ENODEV;

	list_for_each_entry(aac, &aac_devices, entry) {
		if (aac->id == minor_number) {
			file->private_data = aac;
			err = 0;
			break;
		}
	}

	return err;
}

/**
 *	aac_cfg_ioctl		-	AAC configuration request
 *	@inode: inode of device
 *	@file: file handle
 *	@cmd: ioctl command code
 *	@arg: argument
 *
 *	Handles a configuration ioctl. Currently this involves wrapping it
 *	up and feeding it into the nasty windowsalike glue layer.
 *
 *	Bugs: Needs locking against parallel ioctls lower down
 *	Bugs: Needs to handle hot plugging
 */
 
static int aac_cfg_ioctl(struct inode *inode,  struct file *file,
		unsigned int cmd, unsigned long arg)
{
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	return aac_do_ioctl(file->private_data, cmd, (void __user *)arg);
}

#ifdef CONFIG_COMPAT
static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long arg)
{
	long ret;
	lock_kernel();
	switch (cmd) { 
	case FSACTL_MINIPORT_REV_CHECK:
	case FSACTL_SENDFIB:
	case FSACTL_OPEN_GET_ADAPTER_FIB:
	case FSACTL_CLOSE_GET_ADAPTER_FIB:
	case FSACTL_SEND_RAW_SRB:
	case FSACTL_GET_PCI_INFO:
	case FSACTL_QUERY_DISK:
	case FSACTL_DELETE_DISK:
	case FSACTL_FORCE_DELETE_DISK:
	case FSACTL_GET_CONTAINERS: 
	case FSACTL_SEND_LARGE_FIB:
		ret = aac_do_ioctl(dev, cmd, (void __user *)arg);
		break;

	case FSACTL_GET_NEXT_ADAPTER_FIB: {
		struct fib_ioctl __user *f;
		
		f = compat_alloc_user_space(sizeof(*f));
		ret = 0;
		if (clear_user(f, sizeof(*f)))
			ret = -EFAULT;
		if (copy_in_user(f, (void __user *)arg, sizeof(struct fib_ioctl) - sizeof(u32)))
			ret = -EFAULT;
		if (!ret)
			ret = aac_do_ioctl(dev, cmd, f);
		break;
	}

	default:
		ret = -ENOIOCTLCMD; 
		break;
	} 
	unlock_kernel();
	return ret;
}

static int aac_compat_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
{
	struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
	return aac_compat_do_ioctl(dev, cmd, (unsigned long)arg);
}

static long aac_compat_cfg_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	return aac_compat_do_ioctl((struct aac_dev *)file->private_data, cmd, arg);
}
#endif

static ssize_t aac_show_model(struct class_device *class_dev,
		char *buf)
{
	struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
	int len;

	if (dev->supplement_adapter_info.AdapterTypeText[0]) {
		char * cp = dev->supplement_adapter_info.AdapterTypeText;
		while (*cp && *cp != ' ')
			++cp;
		while (*cp == ' ')
			++cp;
		len = snprintf(buf, PAGE_SIZE, "%s\n", cp);
	} else
		len = snprintf(buf, PAGE_SIZE, "%s\n",
		  aac_drivers[dev->cardtype].model);
	return len;
}

static ssize_t aac_show_vendor(struct class_device *class_dev,
		char *buf)
{
	struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
	int len;

	if (dev->supplement_adapter_info.AdapterTypeText[0]) {
		char * cp = dev->supplement_adapter_info.AdapterTypeText;
		while (*cp && *cp != ' ')
			++cp;
		len = snprintf(buf, PAGE_SIZE, "%.*s\n",
		  (int)(cp - (char *)dev->supplement_adapter_info.AdapterTypeText),
		  dev->supplement_adapter_info.AdapterTypeText);
	} else
		len = snprintf(buf, PAGE_SIZE, "%s\n",
		  aac_drivers[dev->cardtype].vname);
	return len;
}

static ssize_t aac_show_kernel_version(struct class_device *class_dev,
		char *buf)
{
	struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
	int len, tmp;

	tmp = le32_to_cpu(dev->adapter_info.kernelrev);
	len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n", 
	  tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
	  le32_to_cpu(dev->adapter_info.kernelbuild));
	return len;
}

static ssize_t aac_show_monitor_version(struct class_device *class_dev,
		char *buf)
{
	struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
	int len, tmp;

	tmp = le32_to_cpu(dev->adapter_info.monitorrev);
	len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n", 
	  tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
	  le32_to_cpu(dev->adapter_info.monitorbuild));
	return len;
}

static ssize_t aac_show_bios_version(struct class_device *class_dev,
		char *buf)
{
	struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
	int len, tmp;

	tmp = le32_to_cpu(dev->adapter_info.biosrev);
	len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n", 
	  tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
	  le32_to_cpu(dev->adapter_info.biosbuild));
	return len;
}

ssize_t aac_show_serial_number(struct class_device *class_dev, char *buf)
{
	struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
	int len = 0;

	if (le32_to_cpu(dev->adapter_info.serial[0]) != 0xBAD0)
		len = snprintf(buf, PAGE_SIZE, "%06X\n",
		  le32_to_cpu(dev->adapter_info.serial[0]));
	if (len &&
	  !memcmp(&dev->supplement_adapter_info.MfgPcbaSerialNo[
	    sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo)+2-len],
	  buf, len))
		len = snprintf(buf, PAGE_SIZE, "%.*s\n",
		  (int)sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo),
		  dev->supplement_adapter_info.MfgPcbaSerialNo);
	return len;
}

static ssize_t aac_show_max_channel(struct class_device *class_dev, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n",
	  class_to_shost(class_dev)->max_channel);
}

static ssize_t aac_show_max_id(struct class_device *class_dev, char *buf)
{