diff options
Diffstat (limited to 'include/linux/raspberrypi/vchiq_arm.h')
| -rw-r--r-- | include/linux/raspberrypi/vchiq_arm.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/include/linux/raspberrypi/vchiq_arm.h b/include/linux/raspberrypi/vchiq_arm.h new file mode 100644 index 000000000000..e32b02f99024 --- /dev/null +++ b/include/linux/raspberrypi/vchiq_arm.h @@ -0,0 +1,164 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* + * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved. + * Copyright (c) 2010-2012 Broadcom. All rights reserved. + */ + +#ifndef VCHIQ_ARM_H +#define VCHIQ_ARM_H + +#include <linux/mutex.h> +#include <linux/platform_device.h> +#include <linux/semaphore.h> +#include <linux/atomic.h> +#include "vchiq_core.h" +#include "vchiq_debugfs.h" + +/* Some per-instance constants */ +#define MAX_COMPLETIONS 128 +#define MAX_SERVICES 64 +#define MAX_ELEMENTS 8 +#define MSG_QUEUE_SIZE 128 + +#define VCHIQ_DRV_MAX_CALLBACKS 10 + +struct rpi_firmware; +struct vchiq_device; + +enum USE_TYPE_E { + USE_TYPE_SERVICE, + USE_TYPE_VCHIQ +}; + +struct vchiq_platform_info { + unsigned int cache_line_size; +}; + +struct vchiq_drv_mgmt { + struct rpi_firmware *fw; + const struct vchiq_platform_info *info; + + bool connected; + int num_deferred_callbacks; + /* Protects connected and num_deferred_callbacks */ + struct mutex connected_mutex; + + void (*deferred_callback[VCHIQ_DRV_MAX_CALLBACKS])(void); + + struct semaphore free_fragments_sema; + struct semaphore free_fragments_mutex; + char *fragments_base; + char *free_fragments; + unsigned int fragments_size; + + void __iomem *regs; + + struct vchiq_state state; +}; + +struct user_service { + struct vchiq_service *service; + void __user *userdata; + struct vchiq_instance *instance; + char is_vchi; + char dequeue_pending; + char close_pending; + int message_available_pos; + int msg_insert; + int msg_remove; + struct completion insert_event; + struct completion remove_event; + struct completion close_event; + struct vchiq_header *msg_queue[MSG_QUEUE_SIZE]; +}; + +struct bulk_waiter_node { + struct bulk_waiter bulk_waiter; + int pid; + struct list_head list; +}; + +struct vchiq_instance { + struct vchiq_state *state; + struct vchiq_completion_data_kernel completions[MAX_COMPLETIONS]; + int completion_insert; + int completion_remove; + struct completion insert_event; + struct completion remove_event; + struct mutex completion_mutex; + + int connected; + int closing; + int pid; + int mark; + int use_close_delivered; + int trace; + + struct list_head bulk_waiter_list; + struct mutex bulk_waiter_list_mutex; + + struct vchiq_debugfs_node debugfs_node; +}; + +int +vchiq_use_service(struct vchiq_instance *instance, unsigned int handle); + +extern int +vchiq_release_service(struct vchiq_instance *instance, unsigned int handle); + +extern int +vchiq_check_service(struct vchiq_service *service); + +extern void +vchiq_dump_service_use_state(struct vchiq_state *state); + +extern int +vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service, + enum USE_TYPE_E use_type); +extern int +vchiq_release_internal(struct vchiq_state *state, + struct vchiq_service *service); + +extern struct vchiq_debugfs_node * +vchiq_instance_get_debugfs_node(struct vchiq_instance *instance); + +extern int +vchiq_instance_get_use_count(struct vchiq_instance *instance); + +extern int +vchiq_instance_get_pid(struct vchiq_instance *instance); + +extern int +vchiq_instance_get_trace(struct vchiq_instance *instance); + +extern void +vchiq_instance_set_trace(struct vchiq_instance *instance, int trace); + +extern void +vchiq_add_connected_callback(struct vchiq_device *device, + void (*callback)(void)); + +#if IS_ENABLED(CONFIG_VCHIQ_CDEV) + +extern void +vchiq_deregister_chrdev(void); + +extern int +vchiq_register_chrdev(struct device *parent); + +#else + +static inline void vchiq_deregister_chrdev(void) { } +static inline int vchiq_register_chrdev(struct device *parent) { return 0; } + +#endif /* IS_ENABLED(CONFIG_VCHIQ_CDEV) */ + +extern int +service_callback(struct vchiq_instance *vchiq_instance, enum vchiq_reason reason, + struct vchiq_header *header, unsigned int handle, + void *cb_data, void __user *cb_userdata); + +extern void +free_bulk_waiter(struct vchiq_instance *instance); + +#endif /* VCHIQ_ARM_H */ |