1 /* 2 * Compaq Hot Plug Controller Driver 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com) 6 * Copyright (C) 2001 IBM Corp. 7 * 8 * All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or (at 13 * your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 18 * NON INFRINGEMENT. See the GNU General Public License for more 19 * details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Send feedback to <greg@kroah.com> 26 * 27 */ 28 29 #include <linux/config.h> 30 #include <linux/module.h> 31 #include <linux/kernel.h> 32 #include <linux/types.h> 33 #include <linux/proc_fs.h> 34 #include <linux/workqueue.h> 35 #include <linux/pci.h> 36 #include <linux/debugfs.h> 37 #include "cpqphp.h" 38 39 static int show_ctrl (struct controller *ctrl, char *buf) 40 { 41 char *out = buf; 42 int index; 43 struct pci_resource *res; 44 45 out += sprintf(buf, "Free resources: memory\n"); 46 index = 11; 47 res = ctrl->mem_head; 48 while (res && index--) { 49 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 50 res = res->next; 51 } 52 out += sprintf(out, "Free resources: prefetchable memory\n"); 53 index = 11; 54 res = ctrl->p_mem_head; 55 while (res && index--) { 56 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 57 res = res->next; 58 } 59 out += sprintf(out, "Free resources: IO\n"); 60 index = 11; 61 res = ctrl->io_head; 62 while (res && index--) { 63 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 64 res = res->next; 65 } 66 out += sprintf(out, "Free resources: bus numbers\n"); 67 index = 11; 68 res = ctrl->bus_head; 69 while (res && index--) { 70 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 71 res = res->next; 72 } 73 74 return out - buf; 75 } 76 77 static int show_dev (struct controller *ctrl, char *buf) 78 { 79 char * out = buf; 80 int index; 81 struct pci_resource *res; 82 struct pci_func *new_slot; 83 struct slot *slot; 84 85 slot = ctrl->slot; 86 87 while (slot) { 88 new_slot = cpqhp_slot_find(slot->bus, slot->device, 0); 89 if (!new_slot) 90 break; 91 out += sprintf(out, "assigned resources: memory\n"); 92 index = 11; 93 res = new_slot->mem_head; 94 while (res && index--) { 95 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 96 res = res->next; 97 } 98 out += sprintf(out, "assigned resources: prefetchable memory\n"); 99 index = 11; 100 res = new_slot->p_mem_head; 101 while (res && index--) { 102 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 103 res = res->next; 104 } 105 out += sprintf(out, "assigned resources: IO\n"); 106 index = 11; 107 res = new_slot->io_head; 108 while (res && index--) { 109 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 110 res = res->next; 111 } 112 out += sprintf(out, "assigned resources: bus numbers\n"); 113 index = 11; 114 res = new_slot->bus_head; 115 while (res && index--) { 116 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); 117 res = res->next; 118 } 119 slot=slot->next; 120 } 121 122 return out - buf; 123 } 124 125 static int spew_debug_info(struct controller *ctrl, char *data, int size) 126 { 127 int used; 128 129 used = size - show_ctrl(ctrl, data); 130 used = (size - used) - show_dev(ctrl, &data[used]); 131 return used; 132 } 133 134 struct ctrl_dbg { 135 int size; 136 char *data; 137 struct controller *ctrl; 138 }; 139 140 #define MAX_OUTPUT (4*PAGE_SIZE) 141 142 static int open(struct inode *inode, struct file *file) 143 { 144 struct controller *ctrl = inode->u.generic_ip; 145 struct ctrl_dbg *dbg; 146 int retval = -ENOMEM; 147 148 lock_kernel(); 149 dbg = kmalloc(sizeof(*dbg), GFP_KERNEL); 150 if (!dbg) 151 goto exit; 152 dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); 153 if (!dbg->data) { 154 kfree(dbg); 155 goto exit; 156 } 157 dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT); 158 file->private_data = dbg; 159 retval = 0; 160 exit: 161 unlock_kernel(); 162 return retval; 163 } 164 165 static loff_t lseek(struct file *file, loff_t off, int whence) 166 { 167 struct ctrl_dbg *dbg; 168 loff_t new = -1; 169 170 lock_kernel(); 171 dbg = file->private_data; 172 173 switch (whence) { 174 case 0: 175 new = off; 176 break; 177 case 1: 178 new = file->f_pos + off; 179 break; 180 } 181 if (new < 0 || new > dbg->size) { 182 unlock_kernel(); 183 return -EINVAL; 184 } 185 unlock_kernel(); 186 return (file->f_pos = new); 187 } 188 189 static ssize_t read(struct file *file, char __user *buf, 190 size_t nbytes, loff_t *ppos) 191 { 192 struct ctrl_dbg *dbg = file->private_data; 193 return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size); 194 } 195 196 static int release(struct inode *inode, struct file *file) 197 { 198 struct ctrl_dbg *dbg = file->private_data; 199 200 kfree(dbg->data); 201 kfree(dbg); 202 return 0; 203 } 204 205 static struct file_operations debug_ops = { 206 .owner = THIS_MODULE, 207 .open = open, 208 .llseek = lseek, 209 .read = read, 210 .release = release, 211 }; 212 213 static struct dentry *root; 214 215 void cpqhp_initialize_debugfs(void) 216 { 217 if (!root) 218 root = debugfs_create_dir("cpqhp", NULL); 219 } 220 221 void cpqhp_shutdown_debugfs(void) 222 { 223 debugfs_remove(root); 224 } 225 226 void cpqhp_create_debugfs_files(struct controller *ctrl) 227 { 228 ctrl->dentry = debugfs_create_file(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops); 229 } 230 231 void cpqhp_remove_debugfs_files(struct controller *ctrl) 232 { 233 if (ctrl->dentry) 234 debugfs_remove(ctrl->dentry); 235 ctrl->dentry = NULL; 236 } 237 238