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1604986c3e
DFL device drivers have a common need for checking feature revision information from the DFL header, as well as other common DFL information like the already exposed feature id and type. This patch exposes the feature revision information directly via the DFL device data structure. Since the DFL core code has already read the DFL header, this this patch saves additional mmio reads from DFL device drivers too. Acked-by: Wu Hao <hao.wu@intel.com> Acked-by: Matthew Gerlach <matthew.gerlach@linux.intel.com> Signed-off-by: Martin Hundebøll <mhu@silicom.dk> Signed-off-by: Moritz Fischer <mdf@kernel.org>
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Header file for DFL driver and device API
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*
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* Copyright (C) 2020 Intel Corporation, Inc.
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*/
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#ifndef __LINUX_DFL_H
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#define __LINUX_DFL_H
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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/**
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* enum dfl_id_type - define the DFL FIU types
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*/
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enum dfl_id_type {
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FME_ID = 0,
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PORT_ID = 1,
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DFL_ID_MAX,
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};
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/**
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* struct dfl_device - represent an dfl device on dfl bus
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*
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* @dev: generic device interface.
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* @id: id of the dfl device.
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* @type: type of DFL FIU of the device. See enum dfl_id_type.
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* @feature_id: feature identifier local to its DFL FIU type.
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* @mmio_res: mmio resource of this dfl device.
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* @irqs: list of Linux IRQ numbers of this dfl device.
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* @num_irqs: number of IRQs supported by this dfl device.
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* @cdev: pointer to DFL FPGA container device this dfl device belongs to.
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* @id_entry: matched id entry in dfl driver's id table.
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*/
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struct dfl_device {
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struct device dev;
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int id;
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u16 type;
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u16 feature_id;
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u8 revision;
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struct resource mmio_res;
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int *irqs;
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unsigned int num_irqs;
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struct dfl_fpga_cdev *cdev;
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const struct dfl_device_id *id_entry;
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};
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/**
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* struct dfl_driver - represent an dfl device driver
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*
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* @drv: driver model structure.
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* @id_table: pointer to table of device IDs the driver is interested in.
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* { } member terminated.
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* @probe: mandatory callback for device binding.
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* @remove: callback for device unbinding.
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*/
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struct dfl_driver {
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struct device_driver drv;
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const struct dfl_device_id *id_table;
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int (*probe)(struct dfl_device *dfl_dev);
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void (*remove)(struct dfl_device *dfl_dev);
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};
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#define to_dfl_dev(d) container_of(d, struct dfl_device, dev)
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#define to_dfl_drv(d) container_of(d, struct dfl_driver, drv)
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/*
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* use a macro to avoid include chaining to get THIS_MODULE.
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*/
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#define dfl_driver_register(drv) \
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__dfl_driver_register(drv, THIS_MODULE)
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int __dfl_driver_register(struct dfl_driver *dfl_drv, struct module *owner);
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void dfl_driver_unregister(struct dfl_driver *dfl_drv);
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/*
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* module_dfl_driver() - Helper macro for drivers that don't do
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* anything special in module init/exit. This eliminates a lot of
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* boilerplate. Each module may only use this macro once, and
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* calling it replaces module_init() and module_exit().
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*/
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#define module_dfl_driver(__dfl_driver) \
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module_driver(__dfl_driver, dfl_driver_register, \
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dfl_driver_unregister)
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#endif /* __LINUX_DFL_H */
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