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linux-kernelorg-stable/include/linux/host1x_context_bus.h

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gpu: host1x: Add context bus The context bus is a "dummy" bus that contains struct devices that correspond to IOMMU contexts assigned through Host1x to processes. Even when host1x itself is built as a module, the bus is registered in built-in code so that the built-in ARM SMMU driver is able to reference it. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-05-16 08:52:51 +00:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2021, NVIDIA Corporation. All rights reserved.
*/
#ifndef __LINUX_HOST1X_CONTEXT_BUS_H
#define __LINUX_HOST1X_CONTEXT_BUS_H
#include <linux/device.h>
#ifdef CONFIG_TEGRA_HOST1X_CONTEXT_BUS
gpu: host1x: Make host1x_context_device_bus_type constant Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type a const *"), the driver core can properly handle constant struct bus_type, move the host1x_context_device_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kunwu Chan <chentao@kylinos.cn> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240823080724.148423-1-kunwu.chan@linux.dev
2024-08-23 08:07:24 +00:00
extern const struct bus_type host1x_context_device_bus_type;
gpu: host1x: Add context bus The context bus is a "dummy" bus that contains struct devices that correspond to IOMMU contexts assigned through Host1x to processes. Even when host1x itself is built as a module, the bus is registered in built-in code so that the built-in ARM SMMU driver is able to reference it. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2022-05-16 08:52:51 +00:00
#endif
#endif