From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- drivers/rpmsg/rpmsg_internal.h | 96 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 drivers/rpmsg/rpmsg_internal.h (limited to 'drivers/rpmsg/rpmsg_internal.h') diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h new file mode 100644 index 000000000..a8b7065fd --- /dev/null +++ b/drivers/rpmsg/rpmsg_internal.h @@ -0,0 +1,96 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * remote processor messaging bus internals + * + * Copyright (C) 2011 Texas Instruments, Inc. + * Copyright (C) 2011 Google, Inc. + * + * Ohad Ben-Cohen + * Brian Swetland + */ + +#ifndef __RPMSG_INTERNAL_H__ +#define __RPMSG_INTERNAL_H__ + +#include +#include + +#define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev) +#define to_rpmsg_driver(d) container_of_const(d, struct rpmsg_driver, drv) + +extern const struct class rpmsg_class; + +/** + * struct rpmsg_device_ops - indirection table for the rpmsg_device operations + * @create_channel: create backend-specific channel, optional + * @release_channel: release backend-specific channel, optional + * @create_ept: create backend-specific endpoint, required + * @announce_create: announce presence of new channel, optional + * @announce_destroy: announce destruction of channel, optional + * + * Indirection table for the operations that a rpmsg backend should implement. + * @announce_create and @announce_destroy are optional as the backend might + * advertise new channels implicitly by creating the endpoints. + */ +struct rpmsg_device_ops { + struct rpmsg_device *(*create_channel)(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo); + int (*release_channel)(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo); + struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev, + rpmsg_rx_cb_t cb, void *priv, + struct rpmsg_channel_info chinfo); + + int (*announce_create)(struct rpmsg_device *rpdev); + int (*announce_destroy)(struct rpmsg_device *rpdev); +}; + +/** + * struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations + * @destroy_ept: see @rpmsg_destroy_ept(), required + * @send: see @rpmsg_send(), required + * @sendto: see @rpmsg_sendto(), optional + * @trysend: see @rpmsg_trysend(), required + * @trysendto: see @rpmsg_trysendto(), optional + * @poll: see @rpmsg_poll(), optional + * @set_flow_control: see @rpmsg_set_flow_control(), optional + * @get_mtu: see @rpmsg_get_mtu(), optional + * + * Indirection table for the operations that a rpmsg backend should implement. + * In addition to @destroy_ept, the backend must at least implement @send and + * @trysend, while the variants sending data off-channel are optional. + */ +struct rpmsg_endpoint_ops { + void (*destroy_ept)(struct rpmsg_endpoint *ept); + + int (*send)(struct rpmsg_endpoint *ept, const void *data, int len); + int (*sendto)(struct rpmsg_endpoint *ept, const void *data, int len, u32 dst); + + int (*trysend)(struct rpmsg_endpoint *ept, const void *data, int len); + int (*trysendto)(struct rpmsg_endpoint *ept, const void *data, int len, u32 dst); + __poll_t (*poll)(struct rpmsg_endpoint *ept, struct file *filp, + poll_table *wait); + int (*set_flow_control)(struct rpmsg_endpoint *ept, bool pause, u32 dst); + ssize_t (*get_mtu)(struct rpmsg_endpoint *ept); +}; + +struct device *rpmsg_find_device(struct device *parent, + struct rpmsg_channel_info *chinfo); + +struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo); +int rpmsg_release_channel(struct rpmsg_device *rpdev, + struct rpmsg_channel_info *chinfo); +/** + * rpmsg_ctrldev_register_device() - register a char device for control based on rpdev + * @rpdev: prepared rpdev to be used for creating endpoints + * + * This function wraps rpmsg_register_device() preparing the rpdev for use as + * basis for the rpmsg chrdev. + */ +static inline int rpmsg_ctrldev_register_device(struct rpmsg_device *rpdev) +{ + return rpmsg_register_device_override(rpdev, "rpmsg_ctrl"); +} + +#endif -- cgit v1.3.1