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51570c9d4b
This entry should, under no situation, be modified by device drivers. Now that we have limited its read access to device drivers really needing it and did so through a dedicated helper, we can easily move this variable to the opaque structure in order to prevent any further modification from non-authorized code (out of the core, basically). Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com> Link: https://lore.kernel.org/r/20220207143840.707510-12-miquel.raynal@bootlin.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _INDUSTRIAL_IO_OPAQUE_H_
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#define _INDUSTRIAL_IO_OPAQUE_H_
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/**
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* struct iio_dev_opaque - industrial I/O device opaque information
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* @indio_dev: public industrial I/O device information
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* @id: used to identify device internally
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* @currentmode: operating mode currently in use, may be eventually
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* checked by device drivers but should be considered
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* read-only as this is a core internal bit
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* @driver_module: used to make it harder to undercut users
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* @info_exist_lock: lock to prevent use during removal
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* @trig_readonly: mark the current trigger immutable
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* @event_interface: event chrdevs associated with interrupt lines
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* @attached_buffers: array of buffers statically attached by the driver
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* @attached_buffers_cnt: number of buffers in the array of statically attached buffers
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* @buffer_ioctl_handler: ioctl() handler for this IIO device's buffer interface
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* @buffer_list: list of all buffers currently attached
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* @channel_attr_list: keep track of automatically created channel
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* attributes
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* @chan_attr_group: group for all attrs in base directory
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* @ioctl_handlers: ioctl handlers registered with the core handler
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* @groups: attribute groups
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* @groupcounter: index of next attribute group
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* @legacy_scan_el_group: attribute group for legacy scan elements attribute group
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* @legacy_buffer_group: attribute group for legacy buffer attributes group
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* @bounce_buffer: for devices that call iio_push_to_buffers_with_timestamp_unaligned()
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* @bounce_buffer_size: size of currently allocate bounce buffer
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* @scan_index_timestamp: cache of the index to the timestamp
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* @clock_id: timestamping clock posix identifier
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* @chrdev: associated character device
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* @flags: file ops related flags including busy flag.
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* @debugfs_dentry: device specific debugfs dentry
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* @cached_reg_addr: cached register address for debugfs reads
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* @read_buf: read buffer to be used for the initial reg read
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* @read_buf_len: data length in @read_buf
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*/
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struct iio_dev_opaque {
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struct iio_dev indio_dev;
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int currentmode;
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int id;
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struct module *driver_module;
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struct mutex info_exist_lock;
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bool trig_readonly;
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struct iio_event_interface *event_interface;
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struct iio_buffer **attached_buffers;
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unsigned int attached_buffers_cnt;
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struct iio_ioctl_handler *buffer_ioctl_handler;
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struct list_head buffer_list;
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struct list_head channel_attr_list;
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struct attribute_group chan_attr_group;
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struct list_head ioctl_handlers;
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const struct attribute_group **groups;
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int groupcounter;
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struct attribute_group legacy_scan_el_group;
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struct attribute_group legacy_buffer_group;
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void *bounce_buffer;
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size_t bounce_buffer_size;
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unsigned int scan_index_timestamp;
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clockid_t clock_id;
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struct cdev chrdev;
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unsigned long flags;
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#if defined(CONFIG_DEBUG_FS)
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struct dentry *debugfs_dentry;
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unsigned cached_reg_addr;
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char read_buf[20];
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unsigned int read_buf_len;
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#endif
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};
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#define to_iio_dev_opaque(_indio_dev) \
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container_of((_indio_dev), struct iio_dev_opaque, indio_dev)
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#endif
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