diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/uio/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/uio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/uio/uio_dfl.c | 66 |
4 files changed, 85 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index aa84121c5611..fca4a9f8f065 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6992,6 +6992,7 @@ S: Maintained F: Documentation/ABI/testing/sysfs-bus-dfl* F: Documentation/fpga/dfl.rst F: drivers/fpga/dfl* +F: drivers/uio/uio_dfl.c F: include/linux/dfl.h F: include/uapi/linux/fpga-dfl.h diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig index 202ee81cfc2b..5531f3afeb21 100644 --- a/drivers/uio/Kconfig +++ b/drivers/uio/Kconfig @@ -165,4 +165,21 @@ config UIO_HV_GENERIC to network and storage devices from userspace. If you compile this as a module, it will be called uio_hv_generic. + +config UIO_DFL + tristate "Generic driver for DFL (Device Feature List) bus" + depends on FPGA_DFL + help + Generic DFL (Device Feature List) driver for Userspace I/O devices. + It is useful to provide direct access to DFL devices from userspace. + A sample userspace application using this driver is available for + download in a git repository: + + git clone https://github.com/OPAE/opae-sdk.git + + It could be found at: + + opae-sdk/tools/libopaeuio/ + + If you compile this as a module, it will be called uio_dfl. endif diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile index c285dd2a4539..f2f416a14228 100644 --- a/drivers/uio/Makefile +++ b/drivers/uio/Makefile @@ -11,3 +11,4 @@ obj-$(CONFIG_UIO_PRUSS) += uio_pruss.o obj-$(CONFIG_UIO_MF624) += uio_mf624.o obj-$(CONFIG_UIO_FSL_ELBC_GPCM) += uio_fsl_elbc_gpcm.o obj-$(CONFIG_UIO_HV_GENERIC) += uio_hv_generic.o +obj-$(CONFIG_UIO_DFL) += uio_dfl.o diff --git a/drivers/uio/uio_dfl.c b/drivers/uio/uio_dfl.c new file mode 100644 index 000000000000..89c0fc7b0cbc --- /dev/null +++ b/drivers/uio/uio_dfl.c @@ -0,0 +1,66 @@ +// 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"); |