mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 22:57:27 +07:00
6a8c3be7ec
API to support programming FPGA's. The following functions are exported as GPL: * fpga_mgr_buf_load Load fpga from image in buffer * fpga_mgr_firmware_load Request firmware and load it to the FPGA. * fpga_mgr_register * fpga_mgr_unregister FPGA device drivers can be added by calling fpga_mgr_register() to register a set of fpga_manager_ops to do device specific stuff. * of_fpga_mgr_get * fpga_mgr_put Get/put a reference to a fpga manager. The following sysfs files are created: * /sys/class/fpga_manager/<fpga>/name Name of low level driver. * /sys/class/fpga_manager/<fpga>/state State of fpga manager Signed-off-by: Alan Tull <atull@opensource.altera.com> Acked-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
/*
|
|
* FPGA Framework
|
|
*
|
|
* Copyright (C) 2013-2015 Altera Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <linux/mutex.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#ifndef _LINUX_FPGA_MGR_H
|
|
#define _LINUX_FPGA_MGR_H
|
|
|
|
struct fpga_manager;
|
|
|
|
/**
|
|
* enum fpga_mgr_states - fpga framework states
|
|
* @FPGA_MGR_STATE_UNKNOWN: can't determine state
|
|
* @FPGA_MGR_STATE_POWER_OFF: FPGA power is off
|
|
* @FPGA_MGR_STATE_POWER_UP: FPGA reports power is up
|
|
* @FPGA_MGR_STATE_RESET: FPGA in reset state
|
|
* @FPGA_MGR_STATE_FIRMWARE_REQ: firmware request in progress
|
|
* @FPGA_MGR_STATE_FIRMWARE_REQ_ERR: firmware request failed
|
|
* @FPGA_MGR_STATE_WRITE_INIT: preparing FPGA for programming
|
|
* @FPGA_MGR_STATE_WRITE_INIT_ERR: Error during WRITE_INIT stage
|
|
* @FPGA_MGR_STATE_WRITE: writing image to FPGA
|
|
* @FPGA_MGR_STATE_WRITE_ERR: Error while writing FPGA
|
|
* @FPGA_MGR_STATE_WRITE_COMPLETE: Doing post programming steps
|
|
* @FPGA_MGR_STATE_WRITE_COMPLETE_ERR: Error during WRITE_COMPLETE
|
|
* @FPGA_MGR_STATE_OPERATING: FPGA is programmed and operating
|
|
*/
|
|
enum fpga_mgr_states {
|
|
/* default FPGA states */
|
|
FPGA_MGR_STATE_UNKNOWN,
|
|
FPGA_MGR_STATE_POWER_OFF,
|
|
FPGA_MGR_STATE_POWER_UP,
|
|
FPGA_MGR_STATE_RESET,
|
|
|
|
/* getting an image for loading */
|
|
FPGA_MGR_STATE_FIRMWARE_REQ,
|
|
FPGA_MGR_STATE_FIRMWARE_REQ_ERR,
|
|
|
|
/* write sequence: init, write, complete */
|
|
FPGA_MGR_STATE_WRITE_INIT,
|
|
FPGA_MGR_STATE_WRITE_INIT_ERR,
|
|
FPGA_MGR_STATE_WRITE,
|
|
FPGA_MGR_STATE_WRITE_ERR,
|
|
FPGA_MGR_STATE_WRITE_COMPLETE,
|
|
FPGA_MGR_STATE_WRITE_COMPLETE_ERR,
|
|
|
|
/* fpga is programmed and operating */
|
|
FPGA_MGR_STATE_OPERATING,
|
|
};
|
|
|
|
/*
|
|
* FPGA Manager flags
|
|
* FPGA_MGR_PARTIAL_RECONFIG: do partial reconfiguration if supported
|
|
*/
|
|
#define FPGA_MGR_PARTIAL_RECONFIG BIT(0)
|
|
|
|
/**
|
|
* struct fpga_manager_ops - ops for low level fpga manager drivers
|
|
* @state: returns an enum value of the FPGA's state
|
|
* @write_init: prepare the FPGA to receive confuration data
|
|
* @write: write count bytes of configuration data to the FPGA
|
|
* @write_complete: set FPGA to operating state after writing is done
|
|
* @fpga_remove: optional: Set FPGA into a specific state during driver remove
|
|
*
|
|
* fpga_manager_ops are the low level functions implemented by a specific
|
|
* fpga manager driver. The optional ones are tested for NULL before being
|
|
* called, so leaving them out is fine.
|
|
*/
|
|
struct fpga_manager_ops {
|
|
enum fpga_mgr_states (*state)(struct fpga_manager *mgr);
|
|
int (*write_init)(struct fpga_manager *mgr, u32 flags,
|
|
const char *buf, size_t count);
|
|
int (*write)(struct fpga_manager *mgr, const char *buf, size_t count);
|
|
int (*write_complete)(struct fpga_manager *mgr, u32 flags);
|
|
void (*fpga_remove)(struct fpga_manager *mgr);
|
|
};
|
|
|
|
/**
|
|
* struct fpga_manager - fpga manager structure
|
|
* @name: name of low level fpga manager
|
|
* @dev: fpga manager device
|
|
* @ref_mutex: only allows one reference to fpga manager
|
|
* @state: state of fpga manager
|
|
* @mops: pointer to struct of fpga manager ops
|
|
* @priv: low level driver private date
|
|
*/
|
|
struct fpga_manager {
|
|
const char *name;
|
|
struct device dev;
|
|
struct mutex ref_mutex;
|
|
enum fpga_mgr_states state;
|
|
const struct fpga_manager_ops *mops;
|
|
void *priv;
|
|
};
|
|
|
|
#define to_fpga_manager(d) container_of(d, struct fpga_manager, dev)
|
|
|
|
int fpga_mgr_buf_load(struct fpga_manager *mgr, u32 flags,
|
|
const char *buf, size_t count);
|
|
|
|
int fpga_mgr_firmware_load(struct fpga_manager *mgr, u32 flags,
|
|
const char *image_name);
|
|
|
|
struct fpga_manager *of_fpga_mgr_get(struct device_node *node);
|
|
|
|
void fpga_mgr_put(struct fpga_manager *mgr);
|
|
|
|
int fpga_mgr_register(struct device *dev, const char *name,
|
|
const struct fpga_manager_ops *mops, void *priv);
|
|
|
|
void fpga_mgr_unregister(struct device *dev);
|
|
|
|
#endif /*_LINUX_FPGA_MGR_H */
|