Pileus Git - ~andy/linux/blob - drivers/rapidio/rio-sysfs.c

   1 /*
   2  * RapidIO sysfs attributes and support
   3  *
   4  * Copyright 2005 MontaVista Software, Inc.
   5  * Matt Porter <mporter@kernel.crashing.org>
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/rio.h>
  15 #include <linux/rio_drv.h>
  16 #include <linux/stat.h>
  17
  18 #include "rio.h"
  19
  20 /* Sysfs support */
  21 #define rio_config_attr(field, format_string)                                   \
  22 static ssize_t                                                          \
  23 field##_show(struct device *dev, struct device_attribute *attr, char *buf)                      \
  24 {                                                                       \
  25         struct rio_dev *rdev = to_rio_dev(dev);                         \
  26                                                                         \
  27         return sprintf(buf, format_string, rdev->field);                \
  28 }                                                                       \
  29
  30 rio_config_attr(did, "0x%04x\n");
  31 rio_config_attr(vid, "0x%04x\n");
  32 rio_config_attr(device_rev, "0x%08x\n");
  33 rio_config_attr(asm_did, "0x%04x\n");
  34 rio_config_attr(asm_vid, "0x%04x\n");
  35 rio_config_attr(asm_rev, "0x%04x\n");
  36 rio_config_attr(destid, "0x%04x\n");
  37 rio_config_attr(hopcount, "0x%02x\n");
  38
  39 static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
  40 {
  41         struct rio_dev *rdev = to_rio_dev(dev);
  42         char *str = buf;
  43         int i;
  44
  45         for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
  46                         i++) {
  47                 if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
  48                         continue;
  49                 str +=
  50                     sprintf(str, "%04x %02x\n", i,
  51                             rdev->rswitch->route_table[i]);
  52         }
  53
  54         return (str - buf);
  55 }
  56
  57 static ssize_t lprev_show(struct device *dev,
  58                           struct device_attribute *attr, char *buf)
  59 {
  60         struct rio_dev *rdev = to_rio_dev(dev);
  61
  62         return sprintf(buf, "%s\n",
  63                         (rdev->prev) ? rio_name(rdev->prev) : "root");
  64 }
  65
  66 static ssize_t lnext_show(struct device *dev,
  67                           struct device_attribute *attr, char *buf)
  68 {
  69         struct rio_dev *rdev = to_rio_dev(dev);
  70         char *str = buf;
  71         int i;
  72
  73         if (rdev->pef & RIO_PEF_SWITCH) {
  74                 for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) {
  75                         if (rdev->rswitch->nextdev[i])
  76                                 str += sprintf(str, "%s\n",
  77                                         rio_name(rdev->rswitch->nextdev[i]));
  78                         else
  79                                 str += sprintf(str, "null\n");
  80                 }
  81         }
  82
  83         return str - buf;
  84 }
  85
  86 struct device_attribute rio_dev_attrs[] = {
  87         __ATTR_RO(did),
  88         __ATTR_RO(vid),
  89         __ATTR_RO(device_rev),
  90         __ATTR_RO(asm_did),
  91         __ATTR_RO(asm_vid),
  92         __ATTR_RO(asm_rev),
  93         __ATTR_RO(lprev),
  94         __ATTR_RO(destid),
  95         __ATTR_NULL,
  96 };
  97
  98 static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
  99 static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL);
 100 static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL);
 101
 102 static ssize_t
 103 rio_read_config(struct file *filp, struct kobject *kobj,
 104                 struct bin_attribute *bin_attr,
 105                 char *buf, loff_t off, size_t count)
 106 {
 107         struct rio_dev *dev =
 108             to_rio_dev(container_of(kobj, struct device, kobj));
 109         unsigned int size = 0x100;
 110         loff_t init_off = off;
 111         u8 *data = (u8 *) buf;
 112
 113         /* Several chips lock up trying to read undefined config space */
 114         if (capable(CAP_SYS_ADMIN))
 115                 size = RIO_MAINT_SPACE_SZ;
 116
 117         if (off >= size)
 118                 return 0;
 119         if (off + count > size) {
 120                 size -= off;
 121                 count = size;
 122         } else {
 123                 size = count;
 124         }
 125
 126         if ((off & 1) && size) {
 127                 u8 val;
 128                 rio_read_config_8(dev, off, &val);
 129                 data[off - init_off] = val;
 130                 off++;
 131                 size--;
 132         }
 133
 134         if ((off & 3) && size > 2) {
 135                 u16 val;
 136                 rio_read_config_16(dev, off, &val);
 137                 data[off - init_off] = (val >> 8) & 0xff;
 138                 data[off - init_off + 1] = val & 0xff;
 139                 off += 2;
 140                 size -= 2;
 141         }
 142
 143         while (size > 3) {
 144                 u32 val;
 145                 rio_read_config_32(dev, off, &val);
 146                 data[off - init_off] = (val >> 24) & 0xff;
 147                 data[off - init_off + 1] = (val >> 16) & 0xff;
 148                 data[off - init_off + 2] = (val >> 8) & 0xff;
 149                 data[off - init_off + 3] = val & 0xff;
 150                 off += 4;
 151                 size -= 4;
 152         }
 153
 154         if (size >= 2) {
 155                 u16 val;
 156                 rio_read_config_16(dev, off, &val);
 157                 data[off - init_off] = (val >> 8) & 0xff;
 158                 data[off - init_off + 1] = val & 0xff;
 159                 off += 2;
 160                 size -= 2;
 161         }
 162
 163         if (size > 0) {
 164                 u8 val;
 165                 rio_read_config_8(dev, off, &val);
 166                 data[off - init_off] = val;
 167                 off++;
 168                 --size;
 169         }
 170
 171         return count;
 172 }
 173
 174 static ssize_t
 175 rio_write_config(struct file *filp, struct kobject *kobj,
 176                  struct bin_attribute *bin_attr,
 177                  char *buf, loff_t off, size_t count)
 178 {
 179         struct rio_dev *dev =
 180             to_rio_dev(container_of(kobj, struct device, kobj));
 181         unsigned int size = count;
 182         loff_t init_off = off;
 183         u8 *data = (u8 *) buf;
 184
 185         if (off >= RIO_MAINT_SPACE_SZ)
 186                 return 0;
 187         if (off + count > RIO_MAINT_SPACE_SZ) {
 188                 size = RIO_MAINT_SPACE_SZ - off;
 189                 count = size;
 190         }
 191
 192         if ((off & 1) && size) {
 193                 rio_write_config_8(dev, off, data[off - init_off]);
 194                 off++;
 195                 size--;
 196         }
 197
 198         if ((off & 3) && (size > 2)) {
 199                 u16 val = data[off - init_off + 1];
 200                 val |= (u16) data[off - init_off] << 8;
 201                 rio_write_config_16(dev, off, val);
 202                 off += 2;
 203                 size -= 2;
 204         }
 205
 206         while (size > 3) {
 207                 u32 val = data[off - init_off + 3];
 208                 val |= (u32) data[off - init_off + 2] << 8;
 209                 val |= (u32) data[off - init_off + 1] << 16;
 210                 val |= (u32) data[off - init_off] << 24;
 211                 rio_write_config_32(dev, off, val);
 212                 off += 4;
 213                 size -= 4;
 214         }
 215
 216         if (size >= 2) {
 217                 u16 val = data[off - init_off + 1];
 218                 val |= (u16) data[off - init_off] << 8;
 219                 rio_write_config_16(dev, off, val);
 220                 off += 2;
 221                 size -= 2;
 222         }
 223
 224         if (size) {
 225                 rio_write_config_8(dev, off, data[off - init_off]);
 226                 off++;
 227                 --size;
 228         }
 229
 230         return count;
 231 }
 232
 233 static struct bin_attribute rio_config_attr = {
 234         .attr = {
 235                  .name = "config",
 236                  .mode = S_IRUGO | S_IWUSR,
 237                  },
 238         .size = RIO_MAINT_SPACE_SZ,
 239         .read = rio_read_config,
 240         .write = rio_write_config,
 241 };
 242
 243 /**
 244  * rio_create_sysfs_dev_files - create RIO specific sysfs files
 245  * @rdev: device whose entries should be created
 246  *
 247  * Create files when @rdev is added to sysfs.
 248  */
 249 int rio_create_sysfs_dev_files(struct rio_dev *rdev)
 250 {
 251         int err = 0;
 252
 253         err = device_create_bin_file(&rdev->dev, &rio_config_attr);
 254
 255         if (!err && (rdev->pef & RIO_PEF_SWITCH)) {
 256                 err |= device_create_file(&rdev->dev, &dev_attr_routes);
 257                 err |= device_create_file(&rdev->dev, &dev_attr_lnext);
 258                 err |= device_create_file(&rdev->dev, &dev_attr_hopcount);
 259                 if (!err && rdev->rswitch->sw_sysfs)
 260                         err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
 261         }
 262
 263         if (err)
 264                 pr_warning("RIO: Failed to create attribute file(s) for %s\n",
 265                            rio_name(rdev));
 266
 267         return err;
 268 }
 269
 270 /**
 271  * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
 272  * @rdev: device whose entries we should free
 273  *
 274  * Cleanup when @rdev is removed from sysfs.
 275  */
 276 void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
 277 {
 278         device_remove_bin_file(&rdev->dev, &rio_config_attr);
 279         if (rdev->pef & RIO_PEF_SWITCH) {
 280                 device_remove_file(&rdev->dev, &dev_attr_routes);
 281                 device_remove_file(&rdev->dev, &dev_attr_lnext);
 282                 device_remove_file(&rdev->dev, &dev_attr_hopcount);
 283                 if (rdev->rswitch->sw_sysfs)
 284                         rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
 285         }
 286 }