^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * IBM ASM Service Processor Device Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) IBM Corporation, 2004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Max Asböck <amax@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Parts of this code are based on an article by Jonathan Corbet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * that appeared in Linux Weekly News.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * The IBMASM file virtual filesystem. It creates the following hierarchy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * dynamically when mounted from user space:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * /ibmasm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * |-- 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * | |-- command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * | |-- event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * | |-- reverse_heartbeat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * | `-- remote_video
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * | |-- depth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * | |-- height
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * | `-- width
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * .
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * `-- n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * |-- command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * |-- event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * |-- reverse_heartbeat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * `-- remote_video
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * |-- depth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * |-- height
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * `-- width
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * For each service processor the following files are created:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * command: execute dot commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * write: execute a dot command on the service processor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * read: return the result of a previously executed dot command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * events: listen for service processor events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * read: sleep (interruptible) until an event occurs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * write: wakeup sleeping event listener
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * reverse_heartbeat: send a heartbeat to the service processor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * read: sleep (interruptible) until the reverse heartbeat fails
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * write: wakeup sleeping heartbeat listener
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * remote_video/width
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * remote_video/height
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * remote_video/width: control remote display settings
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * write: set value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * read: read value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <linux/fs_context.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #include "ibmasm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #include "remote.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #include "dot_command.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define IBMASMFS_MAGIC 0x66726f67
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static LIST_HEAD(service_processors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static void ibmasmfs_create_files (struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int ibmasmfs_fill_super(struct super_block *sb, struct fs_context *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int ibmasmfs_get_tree(struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return get_tree_single(fc, ibmasmfs_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static const struct fs_context_operations ibmasmfs_context_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .get_tree = ibmasmfs_get_tree,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int ibmasmfs_init_fs_context(struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) fc->ops = &ibmasmfs_context_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static const struct super_operations ibmasmfs_s_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .statfs = simple_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .drop_inode = generic_delete_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static const struct file_operations *ibmasmfs_dir_ops = &simple_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static struct file_system_type ibmasmfs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .name = "ibmasmfs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .init_fs_context = ibmasmfs_init_fs_context,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .kill_sb = kill_litter_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) MODULE_ALIAS_FS("ibmasmfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static int ibmasmfs_fill_super(struct super_block *sb, struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct inode *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) sb->s_blocksize = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) sb->s_blocksize_bits = PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) sb->s_magic = IBMASMFS_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) sb->s_op = &ibmasmfs_s_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) sb->s_time_gran = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) root = ibmasmfs_make_inode (sb, S_IFDIR | 0500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (!root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) root->i_op = &simple_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) root->i_fop = ibmasmfs_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) sb->s_root = d_make_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (!sb->s_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ibmasmfs_create_files(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct inode *ret = new_inode(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) ret->i_ino = get_next_ino();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ret->i_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static struct dentry *ibmasmfs_create_file(struct dentry *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) const struct file_operations *fops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) dentry = d_alloc_name(parent, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) inode = ibmasmfs_make_inode(parent->d_sb, S_IFREG | mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (!inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) dput(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) inode->i_fop = fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) inode->i_private = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) d_add(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static struct dentry *ibmasmfs_create_dir(struct dentry *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct dentry *dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) dentry = d_alloc_name(parent, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) inode = ibmasmfs_make_inode(parent->d_sb, S_IFDIR | 0500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) dput(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) inode->i_op = &simple_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) inode->i_fop = ibmasmfs_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) d_add(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int ibmasmfs_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return register_filesystem(&ibmasmfs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) void ibmasmfs_unregister(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) unregister_filesystem(&ibmasmfs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) void ibmasmfs_add_sp(struct service_processor *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) list_add(&sp->node, &service_processors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* struct to save state between command file operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) struct ibmasmfs_command_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct service_processor *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct command *command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /* struct to save state between event file operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct ibmasmfs_event_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct service_processor *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct event_reader reader;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) int active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* struct to save state between reverse heartbeat file operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct ibmasmfs_heartbeat_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct service_processor *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct reverse_heartbeat heartbeat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) int active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static int command_file_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct ibmasmfs_command_data *command_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (!inode->i_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) command_data = kmalloc(sizeof(struct ibmasmfs_command_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (!command_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) command_data->command = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) command_data->sp = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) file->private_data = command_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int command_file_close(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct ibmasmfs_command_data *command_data = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (command_data->command)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) command_put(command_data->command);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) kfree(command_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static ssize_t command_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct ibmasmfs_command_data *command_data = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct command *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (count == 0 || count > IBMASM_CMD_MAX_BUFFER_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) spin_lock_irqsave(&command_data->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) cmd = command_data->command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (cmd == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) spin_unlock_irqrestore(&command_data->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) command_data->command = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) spin_unlock_irqrestore(&command_data->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (cmd->status != IBMASM_CMD_COMPLETE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) command_put(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) len = min(count, cmd->buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (copy_to_user(buf, cmd->buffer, len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) command_put(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) command_put(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static ssize_t command_file_write(struct file *file, const char __user *ubuff, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct ibmasmfs_command_data *command_data = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct command *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (count == 0 || count > IBMASM_CMD_MAX_BUFFER_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) /* commands are executed sequentially, only one command at a time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (command_data->command)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) cmd = ibmasm_new_command(command_data->sp, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (!cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (copy_from_user(cmd->buffer, ubuff, count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) command_put(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) spin_lock_irqsave(&command_data->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (command_data->command) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) spin_unlock_irqrestore(&command_data->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) command_put(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) command_data->command = cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) spin_unlock_irqrestore(&command_data->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ibmasm_exec_command(command_data->sp, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) ibmasm_wait_for_response(cmd, get_dot_command_timeout(cmd->buffer));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static int event_file_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct ibmasmfs_event_data *event_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct service_processor *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (!inode->i_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) sp = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) event_data = kmalloc(sizeof(struct ibmasmfs_event_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (!event_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) ibmasm_event_reader_register(sp, &event_data->reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) event_data->sp = sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) event_data->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) file->private_data = event_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static int event_file_close(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) struct ibmasmfs_event_data *event_data = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) ibmasm_event_reader_unregister(event_data->sp, &event_data->reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) kfree(event_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static ssize_t event_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct ibmasmfs_event_data *event_data = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct event_reader *reader = &event_data->reader;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct service_processor *sp = event_data->sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (count == 0 || count > IBMASM_EVENT_MAX_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) spin_lock_irqsave(&sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (event_data->active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) spin_unlock_irqrestore(&sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) event_data->active = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) spin_unlock_irqrestore(&sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) ret = ibmasm_get_next_event(sp, reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (ret <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (count < reader->data_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (copy_to_user(buf, reader->data, reader->data_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ret = reader->data_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) event_data->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static ssize_t event_file_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct ibmasmfs_event_data *event_data = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (count != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) ibmasm_cancel_next_event(&event_data->reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static int r_heartbeat_file_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) struct ibmasmfs_heartbeat_data *rhbeat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (!inode->i_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) rhbeat = kmalloc(sizeof(struct ibmasmfs_heartbeat_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (!rhbeat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) rhbeat->sp = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) rhbeat->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) ibmasm_init_reverse_heartbeat(rhbeat->sp, &rhbeat->heartbeat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) file->private_data = rhbeat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) static int r_heartbeat_file_close(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct ibmasmfs_heartbeat_data *rhbeat = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) kfree(rhbeat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) static ssize_t r_heartbeat_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct ibmasmfs_heartbeat_data *rhbeat = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (count == 0 || count > 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) /* allow only one reverse heartbeat per process */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) spin_lock_irqsave(&rhbeat->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (rhbeat->active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) spin_unlock_irqrestore(&rhbeat->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) rhbeat->active = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) spin_unlock_irqrestore(&rhbeat->sp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) result = ibmasm_start_reverse_heartbeat(rhbeat->sp, &rhbeat->heartbeat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) rhbeat->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) static ssize_t r_heartbeat_file_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) struct ibmasmfs_heartbeat_data *rhbeat = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (count != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (rhbeat->active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ibmasm_stop_reverse_heartbeat(&rhbeat->heartbeat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static int remote_settings_file_close(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) static ssize_t remote_settings_file_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) void __iomem *address = (void __iomem *)file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) unsigned int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) char lbuf[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) value = readl(address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) len = snprintf(lbuf, sizeof(lbuf), "%d\n", value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return simple_read_from_buffer(buf, count, offset, lbuf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) static ssize_t remote_settings_file_write(struct file *file, const char __user *ubuff, size_t count, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) void __iomem *address = (void __iomem *)file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) char *buff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) unsigned int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (*offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (count == 0 || count > 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (*offset != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) buff = kzalloc (count + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (!buff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (copy_from_user(buff, ubuff, count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) kfree(buff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) value = simple_strtoul(buff, NULL, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) writel(value, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) kfree(buff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static const struct file_operations command_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) .open = command_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) .release = command_file_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) .read = command_file_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) .write = command_file_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) static const struct file_operations event_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) .open = event_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) .release = event_file_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) .read = event_file_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) .write = event_file_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) static const struct file_operations r_heartbeat_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) .open = r_heartbeat_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) .release = r_heartbeat_file_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) .read = r_heartbeat_file_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) .write = r_heartbeat_file_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) static const struct file_operations remote_settings_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) .open = simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) .release = remote_settings_file_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) .read = remote_settings_file_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) .write = remote_settings_file_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) static void ibmasmfs_create_files (struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) struct list_head *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) struct service_processor *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) list_for_each(entry, &service_processors) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct dentry *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) struct dentry *remote_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) sp = list_entry(entry, struct service_processor, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) dir = ibmasmfs_create_dir(sb->s_root, sp->dirname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (!dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) ibmasmfs_create_file(dir, "command", &command_fops, sp, S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) ibmasmfs_create_file(dir, "event", &event_fops, sp, S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) ibmasmfs_create_file(dir, "reverse_heartbeat", &r_heartbeat_fops, sp, S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) remote_dir = ibmasmfs_create_dir(dir, "remote_video");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (!remote_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) ibmasmfs_create_file(remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) ibmasmfs_create_file(remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) ibmasmfs_create_file(remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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