/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (c) 2009-2013, NVIDIA Corporation. All rights reserved. */ #ifndef __LINUX_HOST1X_H #define __LINUX_HOST1X_H #include <linux/device.h> #include <linux/dma-direction.h> #include <linux/dma-fence.h> #include <linux/spinlock.h> #include <linux/types.h> enum host1x_class { … }; struct host1x; struct host1x_client; struct iommu_group; u64 host1x_get_dma_mask(struct host1x *host1x); /** * struct host1x_bo_cache - host1x buffer object cache * @mappings: list of mappings * @lock: synchronizes accesses to the list of mappings * * Note that entries are not periodically evicted from this cache and instead need to be * explicitly released. This is used primarily for DRM/KMS where the cache's reference is * released when the last reference to a buffer object represented by a mapping in this * cache is dropped. */ struct host1x_bo_cache { … }; static inline void host1x_bo_cache_init(struct host1x_bo_cache *cache) { … } static inline void host1x_bo_cache_destroy(struct host1x_bo_cache *cache) { … } /** * struct host1x_client_ops - host1x client operations * @early_init: host1x client early initialization code * @init: host1x client initialization code * @exit: host1x client tear down code * @late_exit: host1x client late tear down code * @suspend: host1x client suspend code * @resume: host1x client resume code */ struct host1x_client_ops { … }; /** * struct host1x_client - host1x client structure * @list: list node for the host1x client * @host: pointer to struct device representing the host1x controller * @dev: pointer to struct device backing this host1x client * @group: IOMMU group that this client is a member of * @ops: host1x client operations * @class: host1x class represented by this client * @channel: host1x channel associated with this client * @syncpts: array of syncpoints requested for this client * @num_syncpts: number of syncpoints requested for this client * @parent: pointer to parent structure * @usecount: reference count for this structure * @lock: mutex for mutually exclusive concurrency * @cache: host1x buffer object cache */ struct host1x_client { … }; /* * host1x buffer objects */ struct host1x_bo; struct sg_table; struct host1x_bo_mapping { … }; static inline struct host1x_bo_mapping *to_host1x_bo_mapping(struct kref *ref) { … } struct host1x_bo_ops { … }; struct host1x_bo { … }; static inline void host1x_bo_init(struct host1x_bo *bo, const struct host1x_bo_ops *ops) { … } static inline struct host1x_bo *host1x_bo_get(struct host1x_bo *bo) { … } static inline void host1x_bo_put(struct host1x_bo *bo) { … } struct host1x_bo_mapping *host1x_bo_pin(struct device *dev, struct host1x_bo *bo, enum dma_data_direction dir, struct host1x_bo_cache *cache); void host1x_bo_unpin(struct host1x_bo_mapping *map); static inline void *host1x_bo_mmap(struct host1x_bo *bo) { … } static inline void host1x_bo_munmap(struct host1x_bo *bo, void *addr) { … } /* * host1x syncpoints */ #define HOST1X_SYNCPT_CLIENT_MANAGED … #define HOST1X_SYNCPT_HAS_BASE … struct host1x_syncpt_base; struct host1x_syncpt; struct host1x; struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host, u32 id); struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host, u32 id); struct host1x_syncpt *host1x_syncpt_get(struct host1x_syncpt *sp); u32 host1x_syncpt_id(struct host1x_syncpt *sp); u32 host1x_syncpt_read_min(struct host1x_syncpt *sp); u32 host1x_syncpt_read_max(struct host1x_syncpt *sp); u32 host1x_syncpt_read(struct host1x_syncpt *sp); int host1x_syncpt_incr(struct host1x_syncpt *sp); u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs); int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout, u32 *value); struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, unsigned long flags); void host1x_syncpt_put(struct host1x_syncpt *sp); struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, unsigned long flags, const char *name); struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp); u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base); void host1x_syncpt_release_vblank_reservation(struct host1x_client *client, u32 syncpt_id); struct dma_fence *host1x_fence_create(struct host1x_syncpt *sp, u32 threshold, bool timeout); void host1x_fence_cancel(struct dma_fence *fence); /* * host1x channel */ struct host1x_channel; struct host1x_job; struct host1x_channel *host1x_channel_request(struct host1x_client *client); struct host1x_channel *host1x_channel_get(struct host1x_channel *channel); void host1x_channel_stop(struct host1x_channel *channel); void host1x_channel_put(struct host1x_channel *channel); int host1x_job_submit(struct host1x_job *job); /* * host1x job */ #define HOST1X_RELOC_READ … #define HOST1X_RELOC_WRITE … struct host1x_reloc { … }; struct host1x_job { … }; struct host1x_job *host1x_job_alloc(struct host1x_channel *ch, u32 num_cmdbufs, u32 num_relocs, bool skip_firewall); void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo, unsigned int words, unsigned int offset); void host1x_job_add_wait(struct host1x_job *job, u32 id, u32 thresh, bool relative, u32 next_class); struct host1x_job *host1x_job_get(struct host1x_job *job); void host1x_job_put(struct host1x_job *job); int host1x_job_pin(struct host1x_job *job, struct device *dev); void host1x_job_unpin(struct host1x_job *job); /* * subdevice probe infrastructure */ struct host1x_device; /** * struct host1x_driver - host1x logical device driver * @driver: core driver * @subdevs: table of OF device IDs matching subdevices for this driver * @list: list node for the driver * @probe: called when the host1x logical device is probed * @remove: called when the host1x logical device is removed * @shutdown: called when the host1x logical device is shut down */ struct host1x_driver { … }; static inline struct host1x_driver * to_host1x_driver(struct device_driver *driver) { … } int host1x_driver_register_full(struct host1x_driver *driver, struct module *owner); void host1x_driver_unregister(struct host1x_driver *driver); #define host1x_driver_register(driver) … struct host1x_device { … }; static inline struct host1x_device *to_host1x_device(struct device *dev) { … } int host1x_device_init(struct host1x_device *device); int host1x_device_exit(struct host1x_device *device); void __host1x_client_init(struct host1x_client *client, struct lock_class_key *key); void host1x_client_exit(struct host1x_client *client); #define host1x_client_init(client) … int __host1x_client_register(struct host1x_client *client); /* * Note that this wrapper calls __host1x_client_init() for compatibility * with existing callers. Callers that want to separately initialize and * register a host1x client must first initialize using either of the * __host1x_client_init() or host1x_client_init() functions and then use * the low-level __host1x_client_register() function to avoid the client * getting reinitialized. */ #define host1x_client_register(client) … void host1x_client_unregister(struct host1x_client *client); int host1x_client_suspend(struct host1x_client *client); int host1x_client_resume(struct host1x_client *client); struct tegra_mipi_device; struct tegra_mipi_device *tegra_mipi_request(struct device *device, struct device_node *np); void tegra_mipi_free(struct tegra_mipi_device *device); int tegra_mipi_enable(struct tegra_mipi_device *device); int tegra_mipi_disable(struct tegra_mipi_device *device); int tegra_mipi_start_calibration(struct tegra_mipi_device *device); int tegra_mipi_finish_calibration(struct tegra_mipi_device *device); /* host1x memory contexts */ struct host1x_memory_context { … }; #ifdef CONFIG_IOMMU_API struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x, struct device *dev, struct pid *pid); void host1x_memory_context_get(struct host1x_memory_context *cd); void host1x_memory_context_put(struct host1x_memory_context *cd); #else static inline struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x, struct device *dev, struct pid *pid) { return NULL; } static inline void host1x_memory_context_get(struct host1x_memory_context *cd) { } static inline void host1x_memory_context_put(struct host1x_memory_context *cd) { } #endif #endif
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