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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* sandbox host uclass
*
* Copyright 2022 Google LLC
*/
#ifndef __SANDBOX_HOST__
#define __SANDBOX_HOST__
/**
* struct host_sb_plat - platform data for a host device
*
* @label: Label for this device (allocated)
* @filename: Name of file this is attached to, or NULL (allocated)
* @fd: File descriptor of file, or 0 for none (file is not open)
*/
struct host_sb_plat {
char *label;
char *filename;
int fd;
};
/**
* struct host_ops - operations supported by UCLASS_HOST
*/
struct host_ops {
/**
* @attach_file: - Attach a new file to the device
*
* @attach_file.dev: Device to update
* @attach_file.filename: Name of the file, e.g. "/path/to/disk.img"
* @attach_file.Returns: 0 if OK, -EEXIST if a file is already attached, other -ve on
* other error
*/
int (*attach_file)(struct udevice *dev, const char *filename);
/**
* @detach_file: - Detach a file from the device
*
* @detach_file.dev: Device to detach from
* @detach_file.Returns: 0 if OK, -ENOENT if no file is attached, other -ve on other
* error
*/
int (*detach_file)(struct udevice *dev);
};
#define host_get_ops(dev) ((struct host_ops *)(dev)->driver->ops)
/**
* host_attach_file() - Attach a new file to the device
*
* @dev: Device to update
* @filename: Name of the file, e.g. "/path/to/disk.img"
* Returns: 0 if OK, -EEXIST if a file is already attached, other -ve on
* other error
*/
int host_attach_file(struct udevice *dev, const char *filename);
/**
* host_detach_file() - Detach a file from the device
*
* @dev: Device to detach from
* Returns: 0 if OK, -ENOENT if no file is attached, other -ve on other
* error
*/
int host_detach_file(struct udevice *dev);
/**
* host_create_device() - Create a new host device
*
* Any existing device with the same label is removed and unbound first
*
* @label: Label of the attachment, e.g. "test1"
* @removable: true if the device should be marked as removable, false
* if it is fixed. See enum blk_flag_t
* @blksz: logical block size of the device
* @devp: Returns the device created, on success
* Returns: 0 if OK, -ve on error
*/
int host_create_device(const char *label, bool removable, unsigned long blksz,
struct udevice **devp);
/**
* host_create_attach_file() - Create a new host device attached to a file
*
* @label: Label of the attachment, e.g. "test1"
* @filename: Name of the file, e.g. "/path/to/disk.img"
* @removable: true if the device should be marked as removable, false
* if it is fixed. See enum blk_flag_t
* @blksz: logical block size of the device
* @devp: Returns the device created, on success
* Returns: 0 if OK, -ve on error
*/
int host_create_attach_file(const char *label, const char *filename,
bool removable, unsigned long blksz,
struct udevice **devp);
/**
* host_find_by_label() - Find a host by label
*
* Searches all host devices to find one with the given label
*
* @label: Label to find
* Returns: associated device, or NULL if not found
*/
struct udevice *host_find_by_label(const char *label);
/**
* host_get_cur_dev() - Get the current device
*
* Returns current device, or NULL if none
*/
struct udevice *host_get_cur_dev(void);
/**
* host_set_cur_dev() - Set the current device
*
* Sets the current device, or clears it if @dev is NULL
*
* @dev: Device to set as the current one
*/
void host_set_cur_dev(struct udevice *dev);
#endif /* __SANDBOX_HOST__ */
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