mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
4747ab89b4
Version 1 of the Device Feature Header (DFH) definition adds functionality to the Device Feature List (DFL) bus. A DFHv1 header may have one or more parameter blocks that further describes the HW to SW. Add support to the DFL bus to parse the MSI-X parameter. The location of a feature's register set is explicitly described in DFHv1 and can be relative to the base of the DFHv1 or an absolute address. Parse the location and pass the information to DFL driver. Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20230115151447.1353428-4-matthew.gerlach@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Header file for DFL driver and device API
|
|
*
|
|
* Copyright (C) 2020 Intel Corporation, Inc.
|
|
*/
|
|
|
|
#ifndef __LINUX_DFL_H
|
|
#define __LINUX_DFL_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/mod_devicetable.h>
|
|
|
|
/**
|
|
* enum dfl_id_type - define the DFL FIU types
|
|
*/
|
|
enum dfl_id_type {
|
|
FME_ID = 0,
|
|
PORT_ID = 1,
|
|
DFL_ID_MAX,
|
|
};
|
|
|
|
/**
|
|
* struct dfl_device - represent an dfl device on dfl bus
|
|
*
|
|
* @dev: generic device interface.
|
|
* @id: id of the dfl device.
|
|
* @type: type of DFL FIU of the device. See enum dfl_id_type.
|
|
* @feature_id: feature identifier local to its DFL FIU type.
|
|
* @revision: revision of this dfl device feature.
|
|
* @mmio_res: mmio resource of this dfl device.
|
|
* @irqs: list of Linux IRQ numbers of this dfl device.
|
|
* @num_irqs: number of IRQs supported by this dfl device.
|
|
* @cdev: pointer to DFL FPGA container device this dfl device belongs to.
|
|
* @id_entry: matched id entry in dfl driver's id table.
|
|
* @dfh_version: version of DFH for the device
|
|
* @param_size: size of the block parameters in bytes
|
|
* @params: pointer to block of parameters copied memory
|
|
*/
|
|
struct dfl_device {
|
|
struct device dev;
|
|
int id;
|
|
u16 type;
|
|
u16 feature_id;
|
|
u8 revision;
|
|
struct resource mmio_res;
|
|
int *irqs;
|
|
unsigned int num_irqs;
|
|
struct dfl_fpga_cdev *cdev;
|
|
const struct dfl_device_id *id_entry;
|
|
u8 dfh_version;
|
|
unsigned int param_size;
|
|
void *params;
|
|
};
|
|
|
|
/**
|
|
* struct dfl_driver - represent an dfl device driver
|
|
*
|
|
* @drv: driver model structure.
|
|
* @id_table: pointer to table of device IDs the driver is interested in.
|
|
* { } member terminated.
|
|
* @probe: mandatory callback for device binding.
|
|
* @remove: callback for device unbinding.
|
|
*/
|
|
struct dfl_driver {
|
|
struct device_driver drv;
|
|
const struct dfl_device_id *id_table;
|
|
|
|
int (*probe)(struct dfl_device *dfl_dev);
|
|
void (*remove)(struct dfl_device *dfl_dev);
|
|
};
|
|
|
|
#define to_dfl_dev(d) container_of(d, struct dfl_device, dev)
|
|
#define to_dfl_drv(d) container_of(d, struct dfl_driver, drv)
|
|
|
|
/*
|
|
* use a macro to avoid include chaining to get THIS_MODULE.
|
|
*/
|
|
#define dfl_driver_register(drv) \
|
|
__dfl_driver_register(drv, THIS_MODULE)
|
|
int __dfl_driver_register(struct dfl_driver *dfl_drv, struct module *owner);
|
|
void dfl_driver_unregister(struct dfl_driver *dfl_drv);
|
|
|
|
/*
|
|
* module_dfl_driver() - Helper macro for drivers that don't do
|
|
* anything special in module init/exit. This eliminates a lot of
|
|
* boilerplate. Each module may only use this macro once, and
|
|
* calling it replaces module_init() and module_exit().
|
|
*/
|
|
#define module_dfl_driver(__dfl_driver) \
|
|
module_driver(__dfl_driver, dfl_driver_register, \
|
|
dfl_driver_unregister)
|
|
|
|
void *dfh_find_param(struct dfl_device *dfl_dev, int param_id, size_t *pcount);
|
|
#endif /* __LINUX_DFL_H */
|