mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
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304123a3bf
Port RTCPU drivers from kernel/nvidia to kernel/nvidia-oot. In addition to copying the files this patch: 1) Modifies make files to build rtcpu drivers as modules 2) Modifies licenses of all ported files to SPDX 3) Adds MODULE_LICENSE macro to all modules 4) Removes checks for old kernel versions and the dead code after those checks 5) Fixes style errors according to checkpatch.pl Change-Id: If64296a22ce958e5326c7509cb69f8f7154f598e Signed-off-by: Frank Chen <frankc@nvidia.com> Signed-off-by: Matti Ryttylainen <mryttylainen@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2783040 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Ankur Pawar <ankurp@nvidia.com> Reviewed-by: Semi Malinen <smalinen@nvidia.com> Reviewed-by: Pekka Pessi <ppessi@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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*/
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#ifndef _LINUX_TEGRA_IVC_BUS_H
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#define _LINUX_TEGRA_IVC_BUS_H
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#include <linux/tegra-ivc-instance.h>
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#include <linux/types.h>
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extern struct bus_type tegra_ivc_bus_type;
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extern struct device_type tegra_ivc_bus_dev_type;
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struct tegra_ivc_bus;
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struct tegra_ivc_rpc_data;
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struct tegra_ivc_bus *tegra_ivc_bus_create(struct device *);
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void tegra_ivc_bus_ready(struct tegra_ivc_bus *bus, bool online);
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void tegra_ivc_bus_destroy(struct tegra_ivc_bus *bus);
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int tegra_ivc_bus_boot_sync(struct tegra_ivc_bus *bus);
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void tegra_ivc_bus_notify(struct tegra_ivc_bus *bus, u16 group);
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struct tegra_ivc_driver {
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struct device_driver driver;
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struct device_type *dev_type;
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union {
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const struct tegra_ivc_channel_ops *channel;
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} ops;
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};
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static inline struct tegra_ivc_driver *to_tegra_ivc_driver(
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struct device_driver *drv)
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{
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if (drv == NULL)
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return NULL;
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return container_of(drv, struct tegra_ivc_driver, driver);
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}
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int tegra_ivc_driver_register(struct tegra_ivc_driver *drv);
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void tegra_ivc_driver_unregister(struct tegra_ivc_driver *drv);
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#define tegra_ivc_module_driver(drv) \
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module_driver(drv, tegra_ivc_driver_register, \
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tegra_ivc_driver_unregister)
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#define tegra_ivc_subsys_driver(__driver, __register, __unregister, ...) \
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static int __init __driver##_init(void) \
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{ \
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return __register(&(__driver), ##__VA_ARGS__); \
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} \
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subsys_initcall_sync(__driver##_init);
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#define tegra_ivc_subsys_driver_default(__driver) \
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tegra_ivc_subsys_driver(__driver, \
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tegra_ivc_driver_register, \
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tegra_ivc_driver_unregister)
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/* IVC channel driver support */
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extern struct device_type tegra_ivc_channel_type;
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struct tegra_ivc_channel {
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struct ivc ivc;
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struct device dev;
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const struct tegra_ivc_channel_ops __rcu *ops;
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struct tegra_ivc_channel *next;
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struct mutex ivc_wr_lock;
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struct tegra_ivc_rpc_data *rpc_priv;
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atomic_t bus_resets;
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u16 group;
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bool is_ready;
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};
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static inline bool tegra_ivc_channel_online_check(
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struct tegra_ivc_channel *chan)
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{
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atomic_set(&chan->bus_resets, 0);
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smp_wmb();
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smp_rmb();
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return chan->is_ready;
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}
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static inline bool tegra_ivc_channel_has_been_reset(
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struct tegra_ivc_channel *chan)
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{
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smp_rmb();
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return atomic_read(&chan->bus_resets) != 0;
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}
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static inline void *tegra_ivc_channel_get_drvdata(
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struct tegra_ivc_channel *chan)
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{
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return dev_get_drvdata(&chan->dev);
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}
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static inline void tegra_ivc_channel_set_drvdata(
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struct tegra_ivc_channel *chan, void *data)
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{
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dev_set_drvdata(&chan->dev, data);
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}
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static inline struct tegra_ivc_channel *to_tegra_ivc_channel(
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struct device *dev)
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{
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return container_of(dev, struct tegra_ivc_channel, dev);
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}
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static inline struct device *tegra_ivc_channel_to_camrtc_dev(
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struct tegra_ivc_channel *ch)
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{
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if (unlikely(ch == NULL))
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return NULL;
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BUG_ON(ch->dev.parent == NULL);
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BUG_ON(ch->dev.parent->parent == NULL);
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return ch->dev.parent->parent;
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}
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int tegra_ivc_channel_runtime_get(struct tegra_ivc_channel *chan);
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void tegra_ivc_channel_runtime_put(struct tegra_ivc_channel *chan);
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struct tegra_ivc_channel_ops {
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int (*probe)(struct tegra_ivc_channel *);
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void (*ready)(struct tegra_ivc_channel *, bool online);
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void (*remove)(struct tegra_ivc_channel *);
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void (*notify)(struct tegra_ivc_channel *);
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};
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/* Legacy mailbox support */
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struct tegra_ivc_mbox_msg {
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int length;
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void *data;
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};
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#endif
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