Merge "msm: ipa: IPA offload subsystem for ethernet devices" (c0a8ba67) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/platform/msm/Kconfig

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Original line number	Diff line number	Diff line
		@@ -143,4 +143,32 @@ config R8125
		To compile this driver as a module, choose M here: the module
		will be called r8125.

		config IPA_ETH
		bool "IPA Ethernet Offload Sub-system support"
		depends on IPA3
		help
		Enables IPA Ethernet Offload Subsystem for offloading PCI based
		ethernet devices to IPA. The offload subsystem still require a
		compatible network driver to register with it and a corresponding
		offload driver to manage one of more offload data paths that uses
		the network device.

		config IPA_ETH_NOAUTO
		bool "Disable automatic offload initialization of interfaces"
		depends on IPA_ETH
		help
		Enabling this option prevents automatic initialization of offload on
		ethernet interfaces. Debugfs control interface will instead be used
		to enable offloading. This feature is meant only for debugging.
		If unsure, say N.

		config IPA_ETH_DEBUG
		bool "Enable addtional debug logging in the offload sub-system"
		depends on IPA_ETH
		help
		Enabling this option increases the number of messages logged by the offload
		sub-system for aiding debugging. Additional debug messages are logged into
		IPC log as well as kernel log using dynamic debug.
		If unsure, say N.

		endmenu

drivers/platform/msm/Makefile

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		@@ -13,3 +13,4 @@ obj-$(CONFIG_SPS) += sps/
		obj-$(CONFIG_MSM_11AD) += msm_11ad/
		obj-$(CONFIG_EP_PCIE) += ep_pcie/
		obj-$(CONFIG_MSM_MHI_DEV) += mhi_dev/
		obj-$(CONFIG_IPA_ETH) += ethernet/

drivers/platform/msm/ethernet/Makefile

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		# SPDX-License-Identifier: GPL-2.0-only

		#
		# Makefile for the MSM specific device drivers.
		#

		obj-$(CONFIG_IPA_ETH) += ipa-eth.o

		ipa-eth-y := \
		ipa_eth_bus.o \
		ipa_eth.o \
		ipa_eth_debugfs.o \
		ipa_eth_ep.o \
		ipa_eth_gsi.o \
		ipa_eth_net.o \
		ipa_eth_offload.o \
		ipa_eth_pci.o \
		ipa_eth_pm.o \
		ipa_eth_trace.o \
		ipa_eth_uc.o \
		ipa_eth_utils.o

drivers/platform/msm/ethernet/ipa_eth.c

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File added.

Preview size limit exceeded, changes collapsed.

drivers/platform/msm/ethernet/ipa_eth_bus.c

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		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved
		*/

		#include <linux/pci.h>

		#include "ipa_eth_i.h"

		static bool ipa_eth_bus_is_ready;

		struct ipa_eth_bus_map {
		struct bus_type *bus;
		struct ipa_eth_bus *eth_bus;
		int (*modinit)(void);
		void (*modexit)(void);
		} static const bus_map[] = {
		{
		&pci_bus_type,
		&ipa_eth_pci_bus,
		&ipa_eth_pci_modinit,
		&ipa_eth_pci_modexit
		},
		{},
		};

		static struct ipa_eth_bus lookup_eth_bus(struct bus_type bus)
		{
		const struct ipa_eth_bus_map *map;

		for (map = bus_map; map->bus != NULL; map++) {
		if (map->bus == bus)
		return map->eth_bus;
		}

		return NULL;
		}

		int ipa_eth_bus_register_driver(struct ipa_eth_net_driver *nd)
		{
		struct ipa_eth_bus *eth_bus;

		eth_bus = lookup_eth_bus(nd->bus);
		if (!eth_bus) {
		ipa_eth_err("Unsupported bus %s", nd->bus->name);
		return -EOPNOTSUPP;
		}

		return eth_bus->register_driver(nd);
		}

		void ipa_eth_bus_unregister_driver(struct ipa_eth_net_driver *nd)
		{
		struct ipa_eth_bus *eth_bus = lookup_eth_bus(nd->bus);

		if (!eth_bus) {
		ipa_eth_bug("Failed to lookup eth_bus for %s", nd->bus->name);
		return;
		}

		eth_bus->unregister_driver(nd);
		}

		int ipa_eth_bus_enable_pc(struct ipa_eth_device *eth_dev)
		{
		struct ipa_eth_net_driver *nd = eth_dev->nd;
		struct ipa_eth_bus *eth_bus = lookup_eth_bus(nd->bus);

		if (!eth_bus) {
		ipa_eth_dev_bug(eth_dev, "Failed to lookup eth_bus");
		return -EFAULT;
		}

		if (eth_bus->enable_pc)
		return eth_bus->enable_pc(eth_dev);

		return -EFAULT;
		}

		int ipa_eth_bus_disable_pc(struct ipa_eth_device *eth_dev)
		{
		struct ipa_eth_net_driver *nd = eth_dev->nd;
		struct ipa_eth_bus *eth_bus = lookup_eth_bus(nd->bus);

		if (!eth_bus) {
		ipa_eth_dev_bug(eth_dev, "Failed to lookup eth_bus");
		return -EFAULT;
		}

		if (eth_bus->disable_pc)
		return eth_bus->disable_pc(eth_dev);

		return -EFAULT;
		}

		int ipa_eth_bus_modinit(void)
		{
		int rc;
		const struct ipa_eth_bus_map *map;

		/* initialize all registered busses */
		for (rc = 0, map = bus_map; map->bus != NULL; map++)
		rc \|= map->modinit();

		if (rc) {
		ipa_eth_err("Failed to initialize one or more busses");
		goto err_init;
		}

		ipa_eth_bus_is_ready = true;

		ipa_eth_log("Offload sub-system bus module init is complete");

		return 0;

		err_init:
		for (map = bus_map; map->bus != NULL; map++)
		map->modexit();

		return rc;
		}

		void ipa_eth_bus_modexit(void)
		{
		const struct ipa_eth_bus_map *map;

		ipa_eth_log("De-initing offload sub-system bus module");

		if (!ipa_eth_bus_is_ready)
		return;

		ipa_eth_bus_is_ready = false;

		for (map = bus_map; map->bus != NULL; map++)
		map->modexit();
		}