69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Generic DFL driver for Userspace I/O devicess
|
|
*
|
|
* Copyright (C) 2021 Intel Corporation, Inc.
|
|
*/
|
|
#include <linux/dfl.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/uio_driver.h>
|
|
|
|
#define DRIVER_NAME "uio_dfl"
|
|
|
|
static int uio_dfl_probe(struct dfl_device *ddev)
|
|
{
|
|
struct resource *r = &ddev->mmio_res;
|
|
struct device *dev = &ddev->dev;
|
|
struct uio_info *uioinfo;
|
|
struct uio_mem *uiomem;
|
|
int ret;
|
|
|
|
uioinfo = devm_kzalloc(dev, sizeof(struct uio_info), GFP_KERNEL);
|
|
if (!uioinfo)
|
|
return -ENOMEM;
|
|
|
|
uioinfo->name = DRIVER_NAME;
|
|
uioinfo->version = "0";
|
|
|
|
uiomem = &uioinfo->mem[0];
|
|
uiomem->memtype = UIO_MEM_PHYS;
|
|
uiomem->addr = r->start & PAGE_MASK;
|
|
uiomem->offs = r->start & ~PAGE_MASK;
|
|
uiomem->size = (uiomem->offs + resource_size(r)
|
|
+ PAGE_SIZE - 1) & PAGE_MASK;
|
|
uiomem->name = r->name;
|
|
|
|
/* Irq is yet to be supported */
|
|
uioinfo->irq = UIO_IRQ_NONE;
|
|
|
|
ret = devm_uio_register_device(dev, uioinfo);
|
|
if (ret)
|
|
dev_err(dev, "unable to register uio device\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define FME_FEATURE_ID_ETH_GROUP 0x10
|
|
#define FME_FEATURE_ID_HSSI_SUBSYS 0x15
|
|
|
|
static const struct dfl_device_id uio_dfl_ids[] = {
|
|
{ FME_ID, FME_FEATURE_ID_ETH_GROUP },
|
|
{ FME_ID, FME_FEATURE_ID_HSSI_SUBSYS },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(dfl, uio_dfl_ids);
|
|
|
|
static struct dfl_driver uio_dfl_driver = {
|
|
.drv = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
.id_table = uio_dfl_ids,
|
|
.probe = uio_dfl_probe,
|
|
};
|
|
module_dfl_driver(uio_dfl_driver);
|
|
|
|
MODULE_DESCRIPTION("Generic DFL driver for Userspace I/O devices");
|
|
MODULE_AUTHOR("Intel Corporation");
|
|
MODULE_LICENSE("GPL v2");
|