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