new file mode 100644
@@ -0,0 +1,12 @@
+What: /sys/bus/cdx/rescan
+Date: March 2023
+Contact: nipun.gupta@amd.com
+Description:
+ Writing y/1/on to this file will cause rescan of the bus
+ and devices on the CDX bus. Any new devices are scanned and
+ added to the list of Linux devices and any devices removed are
+ also deleted from Linux.
+
+ For example::
+
+ # echo 1 > /sys/bus/cdx/rescan
@@ -964,6 +964,13 @@ Q: https://patchwork.kernel.org/project/linux-rdma/list/
F: drivers/infiniband/hw/efa/
F: include/uapi/rdma/efa-abi.h
+AMD CDX BUS DRIVER
+M: Nipun Gupta <nipun.gupta@amd.com>
+M: Nikhil Agarwal <nikhil.agarwal@amd.com>
+S: Maintained
+F: drivers/cdx/*
+F: include/linux/cdx/*
+
AMD CRYPTOGRAPHIC COPROCESSOR (CCP) DRIVER
M: Tom Lendacky <thomas.lendacky@amd.com>
M: John Allen <john.allen@amd.com>
@@ -241,4 +241,6 @@ source "drivers/peci/Kconfig"
source "drivers/hte/Kconfig"
+source "drivers/cdx/Kconfig"
+
endmenu
@@ -194,3 +194,4 @@ obj-$(CONFIG_MOST) += most/
obj-$(CONFIG_PECI) += peci/
obj-$(CONFIG_HTE) += hte/
obj-$(CONFIG_DRM_ACCEL) += accel/
+obj-$(CONFIG_CDX_BUS) += cdx/
new file mode 100644
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# CDX bus configuration
+#
+# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+#
+
+config CDX_BUS
+ bool "CDX Bus driver"
+ depends on OF && ARM64
+ help
+ Driver to enable Composable DMA Transfer(CDX) Bus. CDX bus
+ exposes Fabric devices which uses composable DMA IP to the
+ APU. CDX bus provides a mechanism for scanning and probing
+ of CDX devices. CDX devices are memory mapped on system bus
+ for embedded CPUs. CDX bus uses CDX controller and firmware
+ to scan these CDX devices.
new file mode 100644
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for CDX
+#
+# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+#
+
+obj-$(CONFIG_CDX_BUS) += cdx.o
new file mode 100644
@@ -0,0 +1,408 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CDX bus driver.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+/*
+ * Architecture Overview
+ * =====================
+ * CDX is a Hardware Architecture designed for AMD FPGA devices. It
+ * consists of sophisticated mechanism for interaction between FPGA,
+ * Firmware and the APUs (Application CPUs).
+ *
+ * Firmware resides on RPU (Realtime CPUs) which interacts with
+ * the FPGA program manager and the APUs. The RPU provides memory-mapped
+ * interface (RPU if) which is used to communicate with APUs.
+ *
+ * The diagram below shows an overview of the CDX architecture:
+ *
+ * +--------------------------------------+
+ * | Application CPUs (APU) |
+ * | |
+ * | CDX device drivers|
+ * | Linux OS | |
+ * | CDX bus |
+ * | | |
+ * | CDX controller |
+ * | | |
+ * +-----------------------------|--------+
+ * | (discover, config,
+ * | reset, rescan)
+ * |
+ * +------------------------| RPU if |----+
+ * | | |
+ * | V |
+ * | Realtime CPUs (RPU) |
+ * | |
+ * +--------------------------------------+
+ * |
+ * +---------------------|----------------+
+ * | FPGA | |
+ * | +-----------------------+ |
+ * | | | | |
+ * | +-------+ +-------+ +-------+ |
+ * | | dev 1 | | dev 2 | | dev 3 | |
+ * | +-------+ +-------+ +-------+ |
+ * +--------------------------------------+
+ *
+ * The RPU firmware extracts the device information from the loaded FPGA
+ * image and implements a mechanism that allows the APU drivers to
+ * enumerate such devices (device personality and resource details) via
+ * a dedicated communication channel. RPU mediates operations such as
+ * discover, reset and rescan of the FPGA devices for the APU. This is
+ * done using memory mapped interface provided by the RPU to APU.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/xarray.h>
+#include <linux/cdx/cdx_bus.h>
+#include "cdx.h"
+
+/* Default DMA mask for devices on a CDX bus */
+#define CDX_DEFAULT_DMA_MASK (~0ULL)
+#define MAX_CDX_CONTROLLERS 16
+
+/* CDX controllers registered with the CDX bus */
+static DEFINE_XARRAY_ALLOC(cdx_controllers);
+
+/**
+ * cdx_unregister_device - Unregister a CDX device
+ * @dev: CDX device
+ * @data: This is always passed as NULL, and is not used in this API,
+ * but is required here as the bus_for_each_dev() API expects
+ * the passed function (cdx_unregister_device) to have this
+ * as an argument.
+ *
+ * Return: 0 on success.
+ */
+static int cdx_unregister_device(struct device *dev,
+ void *data)
+{
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+ kfree(cdx_dev->driver_override);
+ cdx_dev->driver_override = NULL;
+ /*
+ * Do not free cdx_dev here as it would be freed in
+ * cdx_device_release() called from within put_device().
+ */
+ device_del(&cdx_dev->dev);
+ put_device(&cdx_dev->dev);
+
+ return 0;
+}
+
+static void cdx_unregister_devices(struct bus_type *bus)
+{
+ /* Reset all the devices attached to cdx bus */
+ bus_for_each_dev(bus, NULL, NULL, cdx_unregister_device);
+}
+
+/**
+ * cdx_match_one_device - Tell if a CDX device structure has a matching
+ * CDX device id structure
+ * @id: single CDX device id structure to match
+ * @dev: the CDX device structure to match against
+ *
+ * Return: matching cdx_device_id structure or NULL if there is no match.
+ */
+static inline const struct cdx_device_id *
+cdx_match_one_device(const struct cdx_device_id *id,
+ const struct cdx_device *dev)
+{
+ /* Use vendor ID and device ID for matching */
+ if ((id->vendor == CDX_ANY_ID || id->vendor == dev->vendor) &&
+ (id->device == CDX_ANY_ID || id->device == dev->device))
+ return id;
+ return NULL;
+}
+
+/**
+ * cdx_match_id - See if a CDX device matches a given cdx_id table
+ * @ids: array of CDX device ID structures to search in
+ * @dev: the CDX device structure to match against.
+ *
+ * Used by a driver to check whether a CDX device is in its list of
+ * supported devices. Returns the matching cdx_device_id structure or
+ * NULL if there is no match.
+ *
+ * Return: matching cdx_device_id structure or NULL if there is no match.
+ */
+static inline const struct cdx_device_id *
+cdx_match_id(const struct cdx_device_id *ids, struct cdx_device *dev)
+{
+ if (ids) {
+ while (ids->vendor || ids->device) {
+ if (cdx_match_one_device(ids, dev))
+ return ids;
+ ids++;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * cdx_bus_match - device to driver matching callback
+ * @dev: the cdx device to match against
+ * @drv: the device driver to search for matching cdx device
+ * structures
+ *
+ * Return: true on success, false otherwise.
+ */
+static int cdx_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+ struct cdx_driver *cdx_drv = to_cdx_driver(drv);
+ const struct cdx_device_id *found_id = NULL;
+ const struct cdx_device_id *ids;
+
+ ids = cdx_drv->match_id_table;
+
+ /* When driver_override is set, only bind to the matching driver */
+ if (cdx_dev->driver_override && strcmp(cdx_dev->driver_override, drv->name))
+ return false;
+
+ found_id = cdx_match_id(ids, cdx_dev);
+ if (!found_id)
+ return false;
+
+ do {
+ /*
+ * In case override_only was set, enforce driver_override
+ * matching.
+ */
+ if (!found_id->override_only)
+ return true;
+ if (cdx_dev->driver_override)
+ return true;
+
+ ids = found_id + 1;
+ found_id = cdx_match_id(ids, cdx_dev);
+ } while (found_id);
+
+ return false;
+}
+
+static int cdx_probe(struct device *dev)
+{
+ struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+ int error;
+
+ error = cdx_drv->probe(cdx_dev);
+ if (error) {
+ dev_err_probe(dev, error, "%s failed\n", __func__);
+ return error;
+ }
+
+ return 0;
+}
+
+static void cdx_remove(struct device *dev)
+{
+ struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+ if (cdx_drv && cdx_drv->remove)
+ cdx_drv->remove(cdx_dev);
+}
+
+static void cdx_shutdown(struct device *dev)
+{
+ struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+ if (cdx_drv && cdx_drv->shutdown)
+ cdx_drv->shutdown(cdx_dev);
+}
+
+static int cdx_dma_configure(struct device *dev)
+{
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+ u32 input_id = cdx_dev->req_id;
+ int ret;
+
+ ret = of_dma_configure_id(dev, dev->parent->of_node, 0, &input_id);
+ if (ret && ret != -EPROBE_DEFER) {
+ dev_err(dev, "of_dma_configure_id() failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static ssize_t rescan_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ struct cdx_controller *cdx;
+ unsigned long index;
+ bool val;
+
+ if (kstrtobool(buf, &val) < 0)
+ return -EINVAL;
+
+ if (!val)
+ return -EINVAL;
+
+ /* Unregister all the devices on the bus */
+ cdx_unregister_devices(&cdx_bus_type);
+
+ /* Rescan all the devices */
+ xa_for_each(&cdx_controllers, index, cdx) {
+ int ret;
+
+ ret = cdx->ops->scan(cdx);
+ if (ret)
+ dev_err(cdx->dev, "cdx bus scanning failed\n");
+ }
+
+ return count;
+}
+static BUS_ATTR_WO(rescan);
+
+static struct attribute *cdx_bus_attrs[] = {
+ &bus_attr_rescan.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(cdx_bus);
+
+struct bus_type cdx_bus_type = {
+ .name = "cdx",
+ .match = cdx_bus_match,
+ .probe = cdx_probe,
+ .remove = cdx_remove,
+ .shutdown = cdx_shutdown,
+ .dma_configure = cdx_dma_configure,
+ .bus_groups = cdx_bus_groups,
+};
+EXPORT_SYMBOL_GPL(cdx_bus_type);
+
+int __cdx_driver_register(struct cdx_driver *cdx_driver,
+ struct module *owner)
+{
+ int error;
+
+ cdx_driver->driver.owner = owner;
+ cdx_driver->driver.bus = &cdx_bus_type;
+
+ error = driver_register(&cdx_driver->driver);
+ if (error) {
+ pr_err("driver_register() failed for %s: %d\n",
+ cdx_driver->driver.name, error);
+ return error;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__cdx_driver_register);
+
+void cdx_driver_unregister(struct cdx_driver *cdx_driver)
+{
+ driver_unregister(&cdx_driver->driver);
+}
+EXPORT_SYMBOL_GPL(cdx_driver_unregister);
+
+static void cdx_device_release(struct device *dev)
+{
+ struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+ kfree(cdx_dev);
+}
+
+int cdx_device_add(struct cdx_dev_params *dev_params)
+{
+ struct cdx_controller *cdx = dev_params->cdx;
+ struct device *parent = cdx->dev;
+ struct cdx_device *cdx_dev;
+ int ret;
+
+ cdx_dev = kzalloc(sizeof(*cdx_dev), GFP_KERNEL);
+ if (!cdx_dev)
+ return -ENOMEM;
+
+ /* Populate resource */
+ memcpy(cdx_dev->res, dev_params->res, sizeof(struct resource) *
+ dev_params->res_count);
+ cdx_dev->res_count = dev_params->res_count;
+
+ /* Populate CDX dev params */
+ cdx_dev->req_id = dev_params->req_id;
+ cdx_dev->vendor = dev_params->vendor;
+ cdx_dev->device = dev_params->device;
+ cdx_dev->bus_num = dev_params->bus_num;
+ cdx_dev->dev_num = dev_params->dev_num;
+ cdx_dev->cdx = dev_params->cdx;
+ cdx_dev->dma_mask = CDX_DEFAULT_DMA_MASK;
+
+ /* Initialize generic device */
+ device_initialize(&cdx_dev->dev);
+ cdx_dev->dev.parent = parent;
+ cdx_dev->dev.bus = &cdx_bus_type;
+ cdx_dev->dev.dma_mask = &cdx_dev->dma_mask;
+ cdx_dev->dev.release = cdx_device_release;
+
+ /* Set Name */
+ dev_set_name(&cdx_dev->dev, "cdx-%02x:%02x",
+ ((cdx->id << CDX_CONTROLLER_ID_SHIFT) | (cdx_dev->bus_num & CDX_BUS_NUM_MASK)),
+ cdx_dev->dev_num);
+
+ ret = device_add(&cdx_dev->dev);
+ if (ret) {
+ dev_err(&cdx_dev->dev,
+ "cdx device add failed: %d", ret);
+ goto fail;
+ }
+
+ return 0;
+fail:
+ /*
+ * Do not free cdx_dev here as it would be freed in
+ * cdx_device_release() called from put_device().
+ */
+ put_device(&cdx_dev->dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cdx_device_add);
+
+int cdx_register_controller(struct cdx_controller *cdx)
+{
+ int ret;
+
+ ret = xa_alloc(&cdx_controllers, &cdx->id, cdx,
+ XA_LIMIT(0, MAX_CDX_CONTROLLERS - 1), GFP_KERNEL);
+ if (ret) {
+ dev_err(cdx->dev,
+ "No free index available. Maximum controllers already registered\n");
+ cdx->id = (u8)MAX_CDX_CONTROLLERS;
+ return ret;
+ }
+
+ /* Scan all the devices */
+ cdx->ops->scan(cdx);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cdx_register_controller);
+
+void cdx_unregister_controller(struct cdx_controller *cdx)
+{
+ if (cdx->id >= MAX_CDX_CONTROLLERS)
+ return;
+
+ device_for_each_child(cdx->dev, NULL, cdx_unregister_device);
+ xa_erase(&cdx_controllers, cdx->id);
+}
+EXPORT_SYMBOL_GPL(cdx_unregister_controller);
+
+static int __init cdx_bus_init(void)
+{
+ return bus_register(&cdx_bus_type);
+}
+postcore_initcall(cdx_bus_init);
new file mode 100644
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Header file for the CDX Bus
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef _CDX_H_
+#define _CDX_H_
+
+#include <linux/cdx/cdx_bus.h>
+
+/**
+ * struct cdx_dev_params - CDX device parameters
+ * @cdx: CDX controller associated with the device
+ * @parent: Associated CDX controller
+ * @vendor: Vendor ID for CDX device
+ * @device: Device ID for CDX device
+ * @bus_num: Bus number for this CDX device
+ * @dev_num: Device number for this device
+ * @res: array of MMIO region entries
+ * @res_count: number of valid MMIO regions
+ * @req_id: Requestor ID associated with CDX device
+ */
+struct cdx_dev_params {
+ struct cdx_controller *cdx;
+ u16 vendor;
+ u16 device;
+ u8 bus_num;
+ u8 dev_num;
+ struct resource res[MAX_CDX_DEV_RESOURCES];
+ u8 res_count;
+ u32 req_id;
+};
+
+/**
+ * cdx_register_controller - Register a CDX controller and its ports
+ * on the CDX bus.
+ * @cdx: The CDX controller to register
+ *
+ * Return: -errno on failure, 0 on success.
+ */
+int cdx_register_controller(struct cdx_controller *cdx);
+
+/**
+ * cdx_unregister_controller - Unregister a CDX controller
+ * @cdx: The CDX controller to unregister
+ */
+void cdx_unregister_controller(struct cdx_controller *cdx);
+
+/**
+ * cdx_device_add - Add a CDX device. This function adds a CDX device
+ * on the CDX bus as per the device parameters provided
+ * by caller. It also creates and registers an associated
+ * Linux generic device.
+ * @dev_params: device parameters associated with the device to be created.
+ *
+ * Return: -errno on failure, 0 on success.
+ */
+int cdx_device_add(struct cdx_dev_params *dev_params);
+
+#endif /* _CDX_H_ */
new file mode 100644
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * CDX bus public interface
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ *
+ */
+
+#ifndef _CDX_BUS_H_
+#define _CDX_BUS_H_
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/mod_devicetable.h>
+
+#define MAX_CDX_DEV_RESOURCES 4
+#define CDX_ANY_ID (0xFFFF)
+#define CDX_CONTROLLER_ID_SHIFT 4
+#define CDX_BUS_NUM_MASK 0xF
+
+/* Forward declaration for CDX controller */
+struct cdx_controller;
+
+typedef int (*cdx_scan_cb)(struct cdx_controller *cdx);
+
+/**
+ * CDX_DEVICE_DRIVER_OVERRIDE - macro used to describe a CDX device with
+ * override_only flags.
+ * @vend: the 16 bit CDX Vendor ID
+ * @dev: the 16 bit CDX Device ID
+ * @driver_override: the 32 bit CDX Device override_only
+ *
+ * This macro is used to create a struct cdx_device_id that matches only a
+ * driver_override device.
+ */
+#define CDX_DEVICE_DRIVER_OVERRIDE(vend, dev, driver_override) \
+ .vendor = (vend), .device = (dev), .override_only = (driver_override)
+
+/**
+ * struct cdx_ops - Callbacks supported by CDX controller.
+ * @scan: scan the devices on the controller
+ */
+struct cdx_ops {
+ cdx_scan_cb scan;
+};
+
+/**
+ * struct cdx_controller: CDX controller object
+ * @dev: Linux device associated with the CDX controller.
+ * @priv: private data
+ * @id: Controller ID
+ * @ops: CDX controller ops
+ */
+struct cdx_controller {
+ struct device *dev;
+ void *priv;
+ u32 id;
+ struct cdx_ops *ops;
+};
+
+/**
+ * struct cdx_device - CDX device object
+ * @dev: Linux driver model device object
+ * @cdx: CDX controller associated with the device
+ * @vendor: Vendor ID for CDX device
+ * @device: Device ID for CDX device
+ * @bus_num: Bus number for this CDX device
+ * @dev_num: Device number for this device
+ * @res: array of MMIO region entries
+ * @res_attr: resource binary attribute
+ * @res_count: number of valid MMIO regions
+ * @dma_mask: Default DMA mask
+ * @flags: CDX device flags
+ * @req_id: Requestor ID associated with CDX device
+ * @driver_override: driver name to force a match; do not set directly,
+ * because core frees it; use driver_set_override() to
+ * set or clear it.
+ */
+struct cdx_device {
+ struct device dev;
+ struct cdx_controller *cdx;
+ u16 vendor;
+ u16 device;
+ u8 bus_num;
+ u8 dev_num;
+ struct resource res[MAX_CDX_DEV_RESOURCES];
+ u8 res_count;
+ u64 dma_mask;
+ u16 flags;
+ u32 req_id;
+ const char *driver_override;
+};
+
+#define to_cdx_device(_dev) \
+ container_of(_dev, struct cdx_device, dev)
+
+/**
+ * struct cdx_driver - CDX device driver
+ * @driver: Generic device driver
+ * @match_id_table: table of supported device matching Ids
+ * @probe: Function called when a device is added
+ * @remove: Function called when a device is removed
+ * @shutdown: Function called at shutdown time to quiesce the device
+ * @driver_managed_dma: Device driver doesn't use kernel DMA API for DMA.
+ * For most device drivers, no need to care about this flag
+ * as long as all DMAs are handled through the kernel DMA API.
+ * For some special ones, for example VFIO drivers, they know
+ * how to manage the DMA themselves and set this flag so that
+ * the IOMMU layer will allow them to setup and manage their
+ * own I/O address space.
+ */
+struct cdx_driver {
+ struct device_driver driver;
+ const struct cdx_device_id *match_id_table;
+ int (*probe)(struct cdx_device *dev);
+ int (*remove)(struct cdx_device *dev);
+ void (*shutdown)(struct cdx_device *dev);
+ bool driver_managed_dma;
+};
+
+#define to_cdx_driver(_drv) \
+ container_of(_drv, struct cdx_driver, driver)
+
+/* Macro to avoid include chaining to get THIS_MODULE */
+#define cdx_driver_register(drv) \
+ __cdx_driver_register(drv, THIS_MODULE)
+
+/**
+ * __cdx_driver_register - registers a CDX device driver
+ * @cdx_driver: CDX driver to register
+ * @owner: module owner
+ *
+ * Return: -errno on failure, 0 on success.
+ */
+int __must_check __cdx_driver_register(struct cdx_driver *cdx_driver,
+ struct module *owner);
+
+/**
+ * cdx_driver_unregister - unregisters a device driver from the
+ * CDX bus.
+ * @cdx_driver: CDX driver to register
+ */
+void cdx_driver_unregister(struct cdx_driver *cdx_driver);
+
+extern struct bus_type cdx_bus_type;
+
+#endif /* _CDX_BUS_H_ */
@@ -911,4 +911,19 @@ struct ishtp_device_id {
kernel_ulong_t driver_data;
};
+/**
+ * struct cdx_device_id - CDX device identifier
+ * @vendor: Vendor ID
+ * @device: Device ID
+ * @override_only: Match only when dev->driver_override is this driver.
+ *
+ * Type of entries in the "device Id" table for CDX devices supported by
+ * a CDX device driver.
+ */
+struct cdx_device_id {
+ __u16 vendor;
+ __u16 device;
+ __u32 override_only;
+};
+
#endif /* LINUX_MOD_DEVICETABLE_H */
@@ -262,5 +262,9 @@ int main(void)
DEVID(ishtp_device_id);
DEVID_FIELD(ishtp_device_id, guid);
+ DEVID(cdx_device_id);
+ DEVID_FIELD(cdx_device_id, vendor);
+ DEVID_FIELD(cdx_device_id, device);
+
return 0;
}
@@ -1452,6 +1452,17 @@ static int do_dfl_entry(const char *filename, void *symval, char *alias)
return 1;
}
+/* Looks like: cdx:vNdN */
+static int do_cdx_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD(symval, cdx_device_id, vendor);
+ DEF_FIELD(symval, cdx_device_id, device);
+
+ sprintf(alias, "cdx:v%08Xd%08Xd", vendor, device);
+ return 1;
+}
+
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
{
@@ -1531,6 +1542,7 @@ static const struct devtable devtable[] = {
{"ssam", SIZE_ssam_device_id, do_ssam_entry},
{"dfl", SIZE_dfl_device_id, do_dfl_entry},
{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
+ {"cdx", SIZE_cdx_device_id, do_cdx_entry},
};
/* Create MODULE_ALIAS() statements.