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8897faba2d
Allow optionally set the logical block size of the host device to bind in the "host bind" command. If not given, defaults to 512. Signed-off-by: Bin Meng <bmeng@tinylab.org>
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* sandbox host uclass
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*
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* Copyright 2022 Google LLC
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*/
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#ifndef __SANDBOX_HOST__
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#define __SANDBOX_HOST__
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/**
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* struct host_sb_plat - platform data for a host device
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*
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* @label: Label for this device (allocated)
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* @filename: Name of file this is attached to, or NULL (allocated)
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* @fd: File descriptor of file, or 0 for none (file is not open)
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*/
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struct host_sb_plat {
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char *label;
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char *filename;
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int fd;
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};
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/**
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* struct host_ops - operations supported by UCLASS_HOST
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*/
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struct host_ops {
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/**
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* @attach_file: - Attach a new file to the device
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*
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* @attach_file.dev: Device to update
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* @attach_file.filename: Name of the file, e.g. "/path/to/disk.img"
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* @attach_file.Returns: 0 if OK, -EEXIST if a file is already attached, other -ve on
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* other error
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*/
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int (*attach_file)(struct udevice *dev, const char *filename);
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/**
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* @detach_file: - Detach a file from the device
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*
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* @detach_file.dev: Device to detach from
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* @detach_file.Returns: 0 if OK, -ENOENT if no file is attached, other -ve on other
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* error
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*/
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int (*detach_file)(struct udevice *dev);
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};
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#define host_get_ops(dev) ((struct host_ops *)(dev)->driver->ops)
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/**
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* host_attach_file() - Attach a new file to the device
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*
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* @dev: Device to update
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* @filename: Name of the file, e.g. "/path/to/disk.img"
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* Returns: 0 if OK, -EEXIST if a file is already attached, other -ve on
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* other error
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*/
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int host_attach_file(struct udevice *dev, const char *filename);
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/**
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* host_detach_file() - Detach a file from the device
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*
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* @dev: Device to detach from
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* Returns: 0 if OK, -ENOENT if no file is attached, other -ve on other
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* error
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*/
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int host_detach_file(struct udevice *dev);
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/**
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* host_create_device() - Create a new host device
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*
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* Any existing device with the same label is removed and unbound first
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*
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* @label: Label of the attachment, e.g. "test1"
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* @removable: true if the device should be marked as removable, false
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* if it is fixed. See enum blk_flag_t
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* @blksz: logical block size of the device
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* @devp: Returns the device created, on success
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* Returns: 0 if OK, -ve on error
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*/
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int host_create_device(const char *label, bool removable, unsigned long blksz,
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struct udevice **devp);
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/**
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* host_create_attach_file() - Create a new host device attached to a file
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*
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* @label: Label of the attachment, e.g. "test1"
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* @filename: Name of the file, e.g. "/path/to/disk.img"
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* @removable: true if the device should be marked as removable, false
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* if it is fixed. See enum blk_flag_t
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* @blksz: logical block size of the device
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* @devp: Returns the device created, on success
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* Returns: 0 if OK, -ve on error
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*/
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int host_create_attach_file(const char *label, const char *filename,
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bool removable, unsigned long blksz,
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struct udevice **devp);
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/**
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* host_find_by_label() - Find a host by label
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*
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* Searches all host devices to find one with the given label
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*
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* @label: Label to find
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* Returns: associated device, or NULL if not found
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*/
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struct udevice *host_find_by_label(const char *label);
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/**
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* host_get_cur_dev() - Get the current device
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*
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* Returns current device, or NULL if none
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*/
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struct udevice *host_get_cur_dev(void);
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/**
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* host_set_cur_dev() - Set the current device
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*
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* Sets the current device, or clears it if @dev is NULL
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*
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* @dev: Device to set as the current one
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*/
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void host_set_cur_dev(struct udevice *dev);
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#endif /* __SANDBOX_HOST__ */
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