// 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 static const struct dfl_device_id uio_dfl_ids[] = { { FME_ID, FME_FEATURE_ID_ETH_GROUP }, { } }; 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");