// SPDX-License-Identifier: GPL-2.0-or-later /* * Char device for device raw access * * Copyright (C) 2005-2007 Kristian Hoegsberg <[email protected]> */ #include <linux/bug.h> #include <linux/compat.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/firewire.h> #include <linux/firewire-cdev.h> #include <linux/idr.h> #include <linux/irqflags.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/kref.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/poll.h> #include <linux/sched.h> /* required for linux/wait.h */ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/time.h> #include <linux/uaccess.h> #include <linux/vmalloc.h> #include <linux/wait.h> #include <linux/workqueue.h> #include "core.h" #include <trace/events/firewire.h> /* * ABI version history is documented in linux/firewire-cdev.h. */ #define FW_CDEV_KERNEL_VERSION … #define FW_CDEV_VERSION_EVENT_REQUEST2 … #define FW_CDEV_VERSION_ALLOCATE_REGION_END … #define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW … #define FW_CDEV_VERSION_EVENT_ASYNC_TSTAMP … struct client { … }; static inline void client_get(struct client *client) { … } static void client_release(struct kref *kref) { … } static void client_put(struct client *client) { … } struct client_resource; client_resource_release_fn_t; struct client_resource { … }; struct address_handler_resource { … }; struct outbound_transaction_resource { … }; struct inbound_transaction_resource { … }; struct descriptor_resource { … }; struct iso_resource { … }; static void release_iso_resource(struct client *, struct client_resource *); static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) { … } static void schedule_if_iso_resource(struct client_resource *resource) { … } /* * dequeue_event() just kfree()'s the event, so the event has to be * the first field in a struct XYZ_event. */ struct event { … }; struct bus_reset_event { … }; struct outbound_transaction_event { … }; struct inbound_transaction_event { … }; struct iso_interrupt_event { … }; struct iso_interrupt_mc_event { … }; struct iso_resource_event { … }; struct outbound_phy_packet_event { … }; struct inbound_phy_packet_event { … }; #ifdef CONFIG_COMPAT static void __user *u64_to_uptr(u64 value) { … } static u64 uptr_to_u64(void __user *ptr) { … } #else static inline void __user *u64_to_uptr(u64 value) { return (void __user *)(unsigned long)value; } static inline u64 uptr_to_u64(void __user *ptr) { return (u64)(unsigned long)ptr; } #endif /* CONFIG_COMPAT */ static int fw_device_op_open(struct inode *inode, struct file *file) { … } static void queue_event(struct client *client, struct event *event, void *data0, size_t size0, void *data1, size_t size1) { … } static int dequeue_event(struct client *client, char __user *buffer, size_t count) { … } static ssize_t fw_device_op_read(struct file *file, char __user *buffer, size_t count, loff_t *offset) { … } static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, struct client *client) { … } static void for_each_client(struct fw_device *device, void (*callback)(struct client *client)) { … } static int schedule_reallocations(int id, void *p, void *data) { … } static void queue_bus_reset_event(struct client *client) { … } void fw_device_cdev_update(struct fw_device *device) { … } static void wake_up_client(struct client *client) { … } void fw_device_cdev_remove(struct fw_device *device) { … } ioctl_arg; static int ioctl_get_info(struct client *client, union ioctl_arg *arg) { … } static int add_client_resource(struct client *client, struct client_resource *resource, gfp_t gfp_mask) { … } static int release_client_resource(struct client *client, u32 handle, client_resource_release_fn_t release, struct client_resource **return_resource) { … } static void release_transaction(struct client *client, struct client_resource *resource) { … } static void complete_transaction(struct fw_card *card, int rcode, u32 request_tstamp, u32 response_tstamp, void *payload, size_t length, void *data) { … } static int init_request(struct client *client, struct fw_cdev_send_request *request, int destination_id, int speed) { … } static int ioctl_send_request(struct client *client, union ioctl_arg *arg) { … } static void release_request(struct client *client, struct client_resource *resource) { … } static void handle_request(struct fw_card *card, struct fw_request *request, int tcode, int destination, int source, int generation, unsigned long long offset, void *payload, size_t length, void *callback_data) { … } static void release_address_handler(struct client *client, struct client_resource *resource) { … } static int ioctl_allocate(struct client *client, union ioctl_arg *arg) { … } static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) { … } static int ioctl_send_response(struct client *client, union ioctl_arg *arg) { … } static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) { … } static void release_descriptor(struct client *client, struct client_resource *resource) { … } static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) { … } static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) { … } static void iso_callback(struct fw_iso_context *context, u32 cycle, size_t header_length, void *header, void *data) { … } static void iso_mc_callback(struct fw_iso_context *context, dma_addr_t completed, void *data) { … } static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) { … } static struct fw_iso_context *fw_iso_mc_context_create(struct fw_card *card, fw_iso_mc_callback_t callback, void *callback_data) { … } static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) { … } static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) { … } /* Macros for decoding the iso packet control header. */ #define GET_PAYLOAD_LENGTH(v) … #define GET_INTERRUPT(v) … #define GET_SKIP(v) … #define GET_TAG(v) … #define GET_SY(v) … #define GET_HEADER_LENGTH(v) … static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) { … } static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) { … } static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) { … } static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) { … } static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) { … } static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) { … } static void iso_resource_work(struct work_struct *work) { … } static void release_iso_resource(struct client *client, struct client_resource *resource) { … } static int init_iso_resource(struct client *client, struct fw_cdev_allocate_iso_resource *request, int todo) { … } static int ioctl_allocate_iso_resource(struct client *client, union ioctl_arg *arg) { … } static int ioctl_deallocate_iso_resource(struct client *client, union ioctl_arg *arg) { … } static int ioctl_allocate_iso_resource_once(struct client *client, union ioctl_arg *arg) { … } static int ioctl_deallocate_iso_resource_once(struct client *client, union ioctl_arg *arg) { … } /* * Returns a speed code: Maximum speed to or from this device, * limited by the device's link speed, the local node's link speed, * and all PHY port speeds between the two links. */ static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) { … } static int ioctl_send_broadcast_request(struct client *client, union ioctl_arg *arg) { … } static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) { … } static void outbound_phy_packet_callback(struct fw_packet *packet, struct fw_card *card, int status) { … } static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) { … } static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) { … } void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) { … } static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = …; static int dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) { … } static long fw_device_op_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { … } static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) { … } static int is_outbound_transaction_resource(int id, void *p, void *data) { … } static int has_outbound_transactions(struct client *client) { … } static int shutdown_resource(int id, void *p, void *data) { … } static int fw_device_op_release(struct inode *inode, struct file *file) { … } static __poll_t fw_device_op_poll(struct file *file, poll_table * pt) { … } const struct file_operations fw_device_ops = …;
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