cxlflash: Refine host/device attributes (e0f01a21) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/scsi/cxlflash/main.c

+138 −42

Original line number	Original line	Diff line number	Diff line
	@@ -1995,33 +1995,24 @@ static int cxlflash_change_queue_depth(struct scsi_device *sdev, int qdepth)

	/**		/**
	* cxlflash_show_port_status() - queries and presents the current port status		* cxlflash_show_port_status() - queries and presents the current port status
	* @dev: Generic device associated with the host owning the port.		* @port: Desired port for status reporting.
	* @attr: Device attribute representing the port.		* @afu: AFU owning the specified port.
	* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.		* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
	*		*
	* Return: The size of the ASCII string returned in @buf.		* Return: The size of the ASCII string returned in @buf.
	*/		*/
	static ssize_t cxlflash_show_port_status(struct device *dev,		static ssize_t cxlflash_show_port_status(u32 port, struct afu afu, char buf)
	struct device_attribute *attr,
	char *buf)
	{		{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;
	struct afu *afu = cfg->afu;

	char *disp_status;		char *disp_status;
	int rc;
	u32 port;
	u64 status;		u64 status;
	u64 *fc_regs;		__be64 __iomem *fc_regs;

	rc = kstrtouint((attr->attr.name + 4), 10, &port);		if (port >= NUM_FC_PORTS)
	if (rc \|\| (port >= NUM_FC_PORTS))
	return 0;		return 0;

	fc_regs = &afu->afu_map->global.fc_regs[port][0];		fc_regs = &afu->afu_map->global.fc_regs[port][0];
	status =		status = readq_be(&fc_regs[FC_MTIP_STATUS / 8]);
	(readq_be(&fc_regs[FC_MTIP_STATUS / 8]) & FC_MTIP_STATUS_MASK);		status &= FC_MTIP_STATUS_MASK;

	if (status == FC_MTIP_STATUS_ONLINE)		if (status == FC_MTIP_STATUS_ONLINE)
	disp_status = "online";		disp_status = "online";
	@@ -2030,31 +2021,69 @@ static ssize_t cxlflash_show_port_status(struct device *dev,
	else		else
	disp_status = "unknown";		disp_status = "unknown";

	return snprintf(buf, PAGE_SIZE, "%s\n", disp_status);		return scnprintf(buf, PAGE_SIZE, "%s\n", disp_status);
	}		}

	/**		/**
	* cxlflash_show_lun_mode() - presents the current LUN mode of the host		* port0_show() - queries and presents the current status of port 0
			* @dev: Generic device associated with the host owning the port.
			* @attr: Device attribute representing the port.
			* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
			*
			* Return: The size of the ASCII string returned in @buf.
			*/
			static ssize_t port0_show(struct device *dev,
			struct device_attribute *attr,
			char *buf)
			{
			struct Scsi_Host *shost = class_to_shost(dev);
			struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;
			struct afu *afu = cfg->afu;

			return cxlflash_show_port_status(0, afu, buf);
			}

			/**
			* port1_show() - queries and presents the current status of port 1
			* @dev: Generic device associated with the host owning the port.
			* @attr: Device attribute representing the port.
			* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
			*
			* Return: The size of the ASCII string returned in @buf.
			*/
			static ssize_t port1_show(struct device *dev,
			struct device_attribute *attr,
			char *buf)
			{
			struct Scsi_Host *shost = class_to_shost(dev);
			struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;
			struct afu *afu = cfg->afu;

			return cxlflash_show_port_status(1, afu, buf);
			}

			/**
			* lun_mode_show() - presents the current LUN mode of the host
	* @dev: Generic device associated with the host.		* @dev: Generic device associated with the host.
	* @attr: Device attribute representing the lun mode.		* @attr: Device attribute representing the LUN mode.
	* @buf: Buffer of length PAGE_SIZE to report back the LUN mode in ASCII.		* @buf: Buffer of length PAGE_SIZE to report back the LUN mode in ASCII.
	*		*
	* Return: The size of the ASCII string returned in @buf.		* Return: The size of the ASCII string returned in @buf.
	*/		*/
	static ssize_t cxlflash_show_lun_mode(struct device *dev,		static ssize_t lun_mode_show(struct device *dev,
	struct device_attribute attr, char buf)		struct device_attribute attr, char buf)
	{		{
	struct Scsi_Host *shost = class_to_shost(dev);		struct Scsi_Host *shost = class_to_shost(dev);
	struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;		struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;
	struct afu *afu = cfg->afu;		struct afu *afu = cfg->afu;

	return snprintf(buf, PAGE_SIZE, "%u\n", afu->internal_lun);		return scnprintf(buf, PAGE_SIZE, "%u\n", afu->internal_lun);
	}		}

	/**		/**
	* cxlflash_store_lun_mode() - sets the LUN mode of the host		* lun_mode_store() - sets the LUN mode of the host
	* @dev: Generic device associated with the host.		* @dev: Generic device associated with the host.
	* @attr: Device attribute representing the lun mode.		* @attr: Device attribute representing the LUN mode.
	* @buf: Buffer of length PAGE_SIZE containing the LUN mode in ASCII.		* @buf: Buffer of length PAGE_SIZE containing the LUN mode in ASCII.
	* @count: Length of data resizing in @buf.		* @count: Length of data resizing in @buf.
	*		*
	@@ -2073,7 +2102,7 @@ static ssize_t cxlflash_show_lun_mode(struct device *dev,
	*		*
	* Return: The size of the ASCII string returned in @buf.		* Return: The size of the ASCII string returned in @buf.
	*/		*/
	static ssize_t cxlflash_store_lun_mode(struct device *dev,		static ssize_t lun_mode_store(struct device *dev,
	struct device_attribute *attr,		struct device_attribute *attr,
	const char *buf, size_t count)		const char *buf, size_t count)
	{		{
	@@ -2094,58 +2123,125 @@ static ssize_t cxlflash_store_lun_mode(struct device *dev,
	}		}

	/**		/**
	* cxlflash_show_ioctl_version() - presents the hosts current ioctl version		* ioctl_version_show() - presents the current ioctl version of the host
	* @dev: Generic device associated with the host.		* @dev: Generic device associated with the host.
	* @attr: Device attribute representing the ioctl version.		* @attr: Device attribute representing the ioctl version.
	* @buf: Buffer of length PAGE_SIZE to report back the ioctl version.		* @buf: Buffer of length PAGE_SIZE to report back the ioctl version.
	*		*
	* Return: The size of the ASCII string returned in @buf.		* Return: The size of the ASCII string returned in @buf.
	*/		*/
	static ssize_t cxlflash_show_ioctl_version(struct device *dev,		static ssize_t ioctl_version_show(struct device *dev,
			struct device_attribute attr, char buf)
			{
			return scnprintf(buf, PAGE_SIZE, "%u\n", DK_CXLFLASH_VERSION_0);
			}

			/**
			* cxlflash_show_port_lun_table() - queries and presents the port LUN table
			* @port: Desired port for status reporting.
			* @afu: AFU owning the specified port.
			* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
			*
			* Return: The size of the ASCII string returned in @buf.
			*/
			static ssize_t cxlflash_show_port_lun_table(u32 port,
			struct afu *afu,
			char *buf)
			{
			int i;
			ssize_t bytes = 0;
			__be64 __iomem *fc_port;

			if (port >= NUM_FC_PORTS)
			return 0;

			fc_port = &afu->afu_map->global.fc_port[port][0];

			for (i = 0; i < CXLFLASH_NUM_VLUNS; i++)
			bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,
			"%03d: %016llX\n", i, readq_be(&fc_port[i]));
			return bytes;
			}

			/**
			* port0_lun_table_show() - presents the current LUN table of port 0
			* @dev: Generic device associated with the host owning the port.
			* @attr: Device attribute representing the port.
			* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
			*
			* Return: The size of the ASCII string returned in @buf.
			*/
			static ssize_t port0_lun_table_show(struct device *dev,
	struct device_attribute *attr,		struct device_attribute *attr,
	char *buf)		char *buf)
	{		{
	return scnprintf(buf, PAGE_SIZE, "%u\n", DK_CXLFLASH_VERSION_0);		struct Scsi_Host *shost = class_to_shost(dev);
			struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;
			struct afu *afu = cfg->afu;

			return cxlflash_show_port_lun_table(0, afu, buf);
			}

			/**
			* port1_lun_table_show() - presents the current LUN table of port 1
			* @dev: Generic device associated with the host owning the port.
			* @attr: Device attribute representing the port.
			* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
			*
			* Return: The size of the ASCII string returned in @buf.
			*/
			static ssize_t port1_lun_table_show(struct device *dev,
			struct device_attribute *attr,
			char *buf)
			{
			struct Scsi_Host *shost = class_to_shost(dev);
			struct cxlflash_cfg cfg = (struct cxlflash_cfg )shost->hostdata;
			struct afu *afu = cfg->afu;

			return cxlflash_show_port_lun_table(1, afu, buf);
	}		}

	/**		/**
	* cxlflash_show_dev_mode() - presents the current mode of the device		* mode_show() - presents the current mode of the device
	* @dev: Generic device associated with the device.		* @dev: Generic device associated with the device.
	* @attr: Device attribute representing the device mode.		* @attr: Device attribute representing the device mode.
	* @buf: Buffer of length PAGE_SIZE to report back the dev mode in ASCII.		* @buf: Buffer of length PAGE_SIZE to report back the dev mode in ASCII.
	*		*
	* Return: The size of the ASCII string returned in @buf.		* Return: The size of the ASCII string returned in @buf.
	*/		*/
	static ssize_t cxlflash_show_dev_mode(struct device *dev,		static ssize_t mode_show(struct device *dev,
	struct device_attribute attr, char buf)		struct device_attribute attr, char buf)
	{		{
	struct scsi_device *sdev = to_scsi_device(dev);		struct scsi_device *sdev = to_scsi_device(dev);

	return snprintf(buf, PAGE_SIZE, "%s\n",		return scnprintf(buf, PAGE_SIZE, "%s\n",
	sdev->hostdata ? "superpipe" : "legacy");		sdev->hostdata ? "superpipe" : "legacy");
	}		}

	/*		/*
	* Host attributes		* Host attributes
	*/		*/
	static DEVICE_ATTR(port0, S_IRUGO, cxlflash_show_port_status, NULL);		static DEVICE_ATTR_RO(port0);
	static DEVICE_ATTR(port1, S_IRUGO, cxlflash_show_port_status, NULL);		static DEVICE_ATTR_RO(port1);
	static DEVICE_ATTR(lun_mode, S_IRUGO \| S_IWUSR, cxlflash_show_lun_mode,		static DEVICE_ATTR_RW(lun_mode);
	cxlflash_store_lun_mode);		static DEVICE_ATTR_RO(ioctl_version);
	static DEVICE_ATTR(ioctl_version, S_IRUGO, cxlflash_show_ioctl_version, NULL);		static DEVICE_ATTR_RO(port0_lun_table);
			static DEVICE_ATTR_RO(port1_lun_table);

	static struct device_attribute *cxlflash_host_attrs[] = {		static struct device_attribute *cxlflash_host_attrs[] = {
	&dev_attr_port0,		&dev_attr_port0,
	&dev_attr_port1,		&dev_attr_port1,
	&dev_attr_lun_mode,		&dev_attr_lun_mode,
	&dev_attr_ioctl_version,		&dev_attr_ioctl_version,
			&dev_attr_port0_lun_table,
			&dev_attr_port1_lun_table,
	NULL		NULL
	};		};

	/*		/*
	* Device attributes		* Device attributes
	*/		*/
	static DEVICE_ATTR(mode, S_IRUGO, cxlflash_show_dev_mode, NULL);		static DEVICE_ATTR_RO(mode);

	static struct device_attribute *cxlflash_dev_attrs[] = {		static struct device_attribute *cxlflash_dev_attrs[] = {
	&dev_attr_mode,		&dev_attr_mode,