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86 lines
2.4 KiB
86 lines
2.4 KiB
/* 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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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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