Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 1 | /* |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 2 | * Copyright 2007-2010 Red Hat, Inc. |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 3 | * by Peter Jones <pjones@redhat.com> |
| 4 | * Copyright 2008 IBM, Inc. |
| 5 | * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 6 | * Copyright 2008 |
| 7 | * by Konrad Rzeszutek <ketuzsezr@darnok.org> |
| 8 | * |
| 9 | * This code exposes the iSCSI Boot Format Table to userland via sysfs. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License v2.0 as published by |
| 13 | * the Free Software Foundation |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * Changelog: |
| 21 | * |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 22 | * 06 Jan 2010 - Peter Jones <pjones@redhat.com> |
| 23 | * New changelog entries are in the git log from now on. Not here. |
| 24 | * |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 25 | * 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org> |
| 26 | * Updated comments and copyrights. (v0.4.9) |
| 27 | * |
| 28 | * 11 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 29 | * Converted to using ibft_addr. (v0.4.8) |
| 30 | * |
| 31 | * 8 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 32 | * Combined two functions in one: reserve_ibft_region. (v0.4.7) |
| 33 | * |
| 34 | * 30 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 35 | * Added logic to handle IPv6 addresses. (v0.4.6) |
| 36 | * |
| 37 | * 25 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 38 | * Added logic to handle badly not-to-spec iBFT. (v0.4.5) |
| 39 | * |
| 40 | * 4 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 41 | * Added __init to function declarations. (v0.4.4) |
| 42 | * |
| 43 | * 21 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 44 | * Updated kobject registration, combined unregister functions in one |
| 45 | * and code and style cleanup. (v0.4.3) |
| 46 | * |
| 47 | * 5 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 48 | * Added end-markers to enums and re-organized kobject registration. (v0.4.2) |
| 49 | * |
| 50 | * 4 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 51 | * Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1) |
| 52 | * |
| 53 | * 28 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 54 | * Added sysfs-ibft documentation, moved 'find_ibft' function to |
| 55 | * in its own file and added text attributes for every struct field. (v0.4) |
| 56 | * |
| 57 | * 21 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 58 | * Added text attributes emulating OpenFirmware /proc/device-tree naming. |
| 59 | * Removed binary /sysfs interface (v0.3) |
| 60 | * |
| 61 | * 29 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 62 | * Added functionality in setup.c to reserve iBFT region. (v0.2) |
| 63 | * |
| 64 | * 27 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
| 65 | * First version exposing iBFT data via a binary /sysfs. (v0.1) |
| 66 | * |
| 67 | */ |
| 68 | |
| 69 | |
| 70 | #include <linux/blkdev.h> |
| 71 | #include <linux/capability.h> |
| 72 | #include <linux/ctype.h> |
| 73 | #include <linux/device.h> |
| 74 | #include <linux/err.h> |
| 75 | #include <linux/init.h> |
| 76 | #include <linux/iscsi_ibft.h> |
| 77 | #include <linux/limits.h> |
| 78 | #include <linux/module.h> |
| 79 | #include <linux/pci.h> |
| 80 | #include <linux/slab.h> |
| 81 | #include <linux/stat.h> |
| 82 | #include <linux/string.h> |
| 83 | #include <linux/types.h> |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 84 | #include <linux/acpi.h> |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 85 | #include <linux/iscsi_boot_sysfs.h> |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 86 | |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 87 | #define IBFT_ISCSI_VERSION "0.5.0" |
| 88 | #define IBFT_ISCSI_DATE "2010-Feb-25" |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 89 | |
Joe Perches | 85ee7a1 | 2011-04-23 20:38:19 -0700 | [diff] [blame] | 90 | MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and " |
| 91 | "Konrad Rzeszutek <ketuzsezr@darnok.org>"); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 92 | MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information"); |
| 93 | MODULE_LICENSE("GPL"); |
| 94 | MODULE_VERSION(IBFT_ISCSI_VERSION); |
| 95 | |
| 96 | struct ibft_hdr { |
| 97 | u8 id; |
| 98 | u8 version; |
| 99 | u16 length; |
| 100 | u8 index; |
| 101 | u8 flags; |
| 102 | } __attribute__((__packed__)); |
| 103 | |
| 104 | struct ibft_control { |
| 105 | struct ibft_hdr hdr; |
| 106 | u16 extensions; |
| 107 | u16 initiator_off; |
| 108 | u16 nic0_off; |
| 109 | u16 tgt0_off; |
| 110 | u16 nic1_off; |
| 111 | u16 tgt1_off; |
| 112 | } __attribute__((__packed__)); |
| 113 | |
| 114 | struct ibft_initiator { |
| 115 | struct ibft_hdr hdr; |
| 116 | char isns_server[16]; |
| 117 | char slp_server[16]; |
| 118 | char pri_radius_server[16]; |
| 119 | char sec_radius_server[16]; |
| 120 | u16 initiator_name_len; |
| 121 | u16 initiator_name_off; |
| 122 | } __attribute__((__packed__)); |
| 123 | |
| 124 | struct ibft_nic { |
| 125 | struct ibft_hdr hdr; |
| 126 | char ip_addr[16]; |
| 127 | u8 subnet_mask_prefix; |
| 128 | u8 origin; |
| 129 | char gateway[16]; |
| 130 | char primary_dns[16]; |
| 131 | char secondary_dns[16]; |
| 132 | char dhcp[16]; |
| 133 | u16 vlan; |
| 134 | char mac[6]; |
| 135 | u16 pci_bdf; |
| 136 | u16 hostname_len; |
| 137 | u16 hostname_off; |
| 138 | } __attribute__((__packed__)); |
| 139 | |
| 140 | struct ibft_tgt { |
| 141 | struct ibft_hdr hdr; |
| 142 | char ip_addr[16]; |
| 143 | u16 port; |
| 144 | char lun[8]; |
| 145 | u8 chap_type; |
| 146 | u8 nic_assoc; |
| 147 | u16 tgt_name_len; |
| 148 | u16 tgt_name_off; |
| 149 | u16 chap_name_len; |
| 150 | u16 chap_name_off; |
| 151 | u16 chap_secret_len; |
| 152 | u16 chap_secret_off; |
| 153 | u16 rev_chap_name_len; |
| 154 | u16 rev_chap_name_off; |
| 155 | u16 rev_chap_secret_len; |
| 156 | u16 rev_chap_secret_off; |
| 157 | } __attribute__((__packed__)); |
| 158 | |
| 159 | /* |
| 160 | * The kobject different types and its names. |
| 161 | * |
| 162 | */ |
| 163 | enum ibft_id { |
| 164 | id_reserved = 0, /* We don't support. */ |
| 165 | id_control = 1, /* Should show up only once and is not exported. */ |
| 166 | id_initiator = 2, |
| 167 | id_nic = 3, |
| 168 | id_target = 4, |
| 169 | id_extensions = 5, /* We don't support. */ |
| 170 | id_end_marker, |
| 171 | }; |
| 172 | |
| 173 | /* |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 174 | * The kobject and attribute structures. |
| 175 | */ |
| 176 | |
| 177 | struct ibft_kobject { |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 178 | struct acpi_table_ibft *header; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 179 | union { |
| 180 | struct ibft_initiator *initiator; |
| 181 | struct ibft_nic *nic; |
| 182 | struct ibft_tgt *tgt; |
| 183 | struct ibft_hdr *hdr; |
| 184 | }; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 185 | }; |
| 186 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 187 | static struct iscsi_boot_kset *boot_kset; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 188 | |
| 189 | static const char nulls[16]; |
| 190 | |
| 191 | /* |
| 192 | * Helper functions to parse data properly. |
| 193 | */ |
| 194 | static ssize_t sprintf_ipaddr(char *buf, u8 *ip) |
| 195 | { |
| 196 | char *str = buf; |
| 197 | |
| 198 | if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 && |
| 199 | ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 && |
| 200 | ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) { |
| 201 | /* |
| 202 | * IPV4 |
| 203 | */ |
Harvey Harrison | 6377943 | 2008-10-31 00:56:00 -0700 | [diff] [blame] | 204 | str += sprintf(buf, "%pI4", ip + 12); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 205 | } else { |
| 206 | /* |
| 207 | * IPv6 |
| 208 | */ |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 209 | str += sprintf(str, "%pI6", ip); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 210 | } |
| 211 | str += sprintf(str, "\n"); |
| 212 | return str - buf; |
| 213 | } |
| 214 | |
| 215 | static ssize_t sprintf_string(char *str, int len, char *buf) |
| 216 | { |
| 217 | return sprintf(str, "%.*s\n", len, buf); |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Helper function to verify the IBFT header. |
| 222 | */ |
| 223 | static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length) |
| 224 | { |
| 225 | if (hdr->id != id) { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 226 | printk(KERN_ERR "iBFT error: We expected the %s " \ |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 227 | "field header.id to have %d but " \ |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 228 | "found %d instead!\n", t, id, hdr->id); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 229 | return -ENODEV; |
| 230 | } |
| 231 | if (hdr->length != length) { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 232 | printk(KERN_ERR "iBFT error: We expected the %s " \ |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 233 | "field header.length to have %d but " \ |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 234 | "found %d instead!\n", t, length, hdr->length); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 235 | return -ENODEV; |
| 236 | } |
| 237 | |
| 238 | return 0; |
| 239 | } |
| 240 | |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 241 | /* |
| 242 | * Routines for parsing the iBFT data to be human readable. |
| 243 | */ |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 244 | static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 245 | { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 246 | struct ibft_kobject *entry = data; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 247 | struct ibft_initiator *initiator = entry->initiator; |
| 248 | void *ibft_loc = entry->header; |
| 249 | char *str = buf; |
| 250 | |
| 251 | if (!initiator) |
| 252 | return 0; |
| 253 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 254 | switch (type) { |
| 255 | case ISCSI_BOOT_INI_INDEX: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 256 | str += sprintf(str, "%d\n", initiator->hdr.index); |
| 257 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 258 | case ISCSI_BOOT_INI_FLAGS: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 259 | str += sprintf(str, "%d\n", initiator->hdr.flags); |
| 260 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 261 | case ISCSI_BOOT_INI_ISNS_SERVER: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 262 | str += sprintf_ipaddr(str, initiator->isns_server); |
| 263 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 264 | case ISCSI_BOOT_INI_SLP_SERVER: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 265 | str += sprintf_ipaddr(str, initiator->slp_server); |
| 266 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 267 | case ISCSI_BOOT_INI_PRI_RADIUS_SERVER: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 268 | str += sprintf_ipaddr(str, initiator->pri_radius_server); |
| 269 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 270 | case ISCSI_BOOT_INI_SEC_RADIUS_SERVER: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 271 | str += sprintf_ipaddr(str, initiator->sec_radius_server); |
| 272 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 273 | case ISCSI_BOOT_INI_INITIATOR_NAME: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 274 | str += sprintf_string(str, initiator->initiator_name_len, |
| 275 | (char *)ibft_loc + |
| 276 | initiator->initiator_name_off); |
| 277 | break; |
| 278 | default: |
| 279 | break; |
| 280 | } |
| 281 | |
| 282 | return str - buf; |
| 283 | } |
| 284 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 285 | static ssize_t ibft_attr_show_nic(void *data, int type, char *buf) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 286 | { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 287 | struct ibft_kobject *entry = data; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 288 | struct ibft_nic *nic = entry->nic; |
| 289 | void *ibft_loc = entry->header; |
| 290 | char *str = buf; |
Joe Perches | 00e7825 | 2010-01-14 11:34:19 -0500 | [diff] [blame] | 291 | __be32 val; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 292 | |
| 293 | if (!nic) |
| 294 | return 0; |
| 295 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 296 | switch (type) { |
| 297 | case ISCSI_BOOT_ETH_INDEX: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 298 | str += sprintf(str, "%d\n", nic->hdr.index); |
| 299 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 300 | case ISCSI_BOOT_ETH_FLAGS: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 301 | str += sprintf(str, "%d\n", nic->hdr.flags); |
| 302 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 303 | case ISCSI_BOOT_ETH_IP_ADDR: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 304 | str += sprintf_ipaddr(str, nic->ip_addr); |
| 305 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 306 | case ISCSI_BOOT_ETH_SUBNET_MASK: |
Joe Perches | 00e7825 | 2010-01-14 11:34:19 -0500 | [diff] [blame] | 307 | val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1)); |
| 308 | str += sprintf(str, "%pI4", &val); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 309 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 310 | case ISCSI_BOOT_ETH_ORIGIN: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 311 | str += sprintf(str, "%d\n", nic->origin); |
| 312 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 313 | case ISCSI_BOOT_ETH_GATEWAY: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 314 | str += sprintf_ipaddr(str, nic->gateway); |
| 315 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 316 | case ISCSI_BOOT_ETH_PRIMARY_DNS: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 317 | str += sprintf_ipaddr(str, nic->primary_dns); |
| 318 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 319 | case ISCSI_BOOT_ETH_SECONDARY_DNS: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 320 | str += sprintf_ipaddr(str, nic->secondary_dns); |
| 321 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 322 | case ISCSI_BOOT_ETH_DHCP: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 323 | str += sprintf_ipaddr(str, nic->dhcp); |
| 324 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 325 | case ISCSI_BOOT_ETH_VLAN: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 326 | str += sprintf(str, "%d\n", nic->vlan); |
| 327 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 328 | case ISCSI_BOOT_ETH_MAC: |
hartleys | 2c35294 | 2010-01-05 06:37:43 +0000 | [diff] [blame] | 329 | str += sprintf(str, "%pM\n", nic->mac); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 330 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 331 | case ISCSI_BOOT_ETH_HOSTNAME: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 332 | str += sprintf_string(str, nic->hostname_len, |
| 333 | (char *)ibft_loc + nic->hostname_off); |
| 334 | break; |
| 335 | default: |
| 336 | break; |
| 337 | } |
| 338 | |
| 339 | return str - buf; |
| 340 | }; |
| 341 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 342 | static ssize_t ibft_attr_show_target(void *data, int type, char *buf) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 343 | { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 344 | struct ibft_kobject *entry = data; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 345 | struct ibft_tgt *tgt = entry->tgt; |
| 346 | void *ibft_loc = entry->header; |
| 347 | char *str = buf; |
| 348 | int i; |
| 349 | |
| 350 | if (!tgt) |
| 351 | return 0; |
| 352 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 353 | switch (type) { |
| 354 | case ISCSI_BOOT_TGT_INDEX: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 355 | str += sprintf(str, "%d\n", tgt->hdr.index); |
| 356 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 357 | case ISCSI_BOOT_TGT_FLAGS: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 358 | str += sprintf(str, "%d\n", tgt->hdr.flags); |
| 359 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 360 | case ISCSI_BOOT_TGT_IP_ADDR: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 361 | str += sprintf_ipaddr(str, tgt->ip_addr); |
| 362 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 363 | case ISCSI_BOOT_TGT_PORT: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 364 | str += sprintf(str, "%d\n", tgt->port); |
| 365 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 366 | case ISCSI_BOOT_TGT_LUN: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 367 | for (i = 0; i < 8; i++) |
| 368 | str += sprintf(str, "%x", (u8)tgt->lun[i]); |
| 369 | str += sprintf(str, "\n"); |
| 370 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 371 | case ISCSI_BOOT_TGT_NIC_ASSOC: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 372 | str += sprintf(str, "%d\n", tgt->nic_assoc); |
| 373 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 374 | case ISCSI_BOOT_TGT_CHAP_TYPE: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 375 | str += sprintf(str, "%d\n", tgt->chap_type); |
| 376 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 377 | case ISCSI_BOOT_TGT_NAME: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 378 | str += sprintf_string(str, tgt->tgt_name_len, |
| 379 | (char *)ibft_loc + tgt->tgt_name_off); |
| 380 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 381 | case ISCSI_BOOT_TGT_CHAP_NAME: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 382 | str += sprintf_string(str, tgt->chap_name_len, |
| 383 | (char *)ibft_loc + tgt->chap_name_off); |
| 384 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 385 | case ISCSI_BOOT_TGT_CHAP_SECRET: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 386 | str += sprintf_string(str, tgt->chap_secret_len, |
| 387 | (char *)ibft_loc + tgt->chap_secret_off); |
| 388 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 389 | case ISCSI_BOOT_TGT_REV_CHAP_NAME: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 390 | str += sprintf_string(str, tgt->rev_chap_name_len, |
| 391 | (char *)ibft_loc + |
| 392 | tgt->rev_chap_name_off); |
| 393 | break; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 394 | case ISCSI_BOOT_TGT_REV_CHAP_SECRET: |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 395 | str += sprintf_string(str, tgt->rev_chap_secret_len, |
| 396 | (char *)ibft_loc + |
| 397 | tgt->rev_chap_secret_off); |
| 398 | break; |
| 399 | default: |
| 400 | break; |
| 401 | } |
| 402 | |
| 403 | return str - buf; |
| 404 | } |
| 405 | |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 406 | static int __init ibft_check_device(void) |
| 407 | { |
| 408 | int len; |
| 409 | u8 *pos; |
| 410 | u8 csum = 0; |
| 411 | |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 412 | len = ibft_addr->header.length; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 413 | |
| 414 | /* Sanity checking of iBFT. */ |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 415 | if (ibft_addr->header.revision != 1) { |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 416 | printk(KERN_ERR "iBFT module supports only revision 1, " \ |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 417 | "while this is %d.\n", |
| 418 | ibft_addr->header.revision); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 419 | return -ENOENT; |
| 420 | } |
| 421 | for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) |
| 422 | csum += *pos; |
| 423 | |
| 424 | if (csum) { |
| 425 | printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum); |
| 426 | return -ENOENT; |
| 427 | } |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | /* |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 433 | * Helper routiners to check to determine if the entry is valid |
| 434 | * in the proper iBFT structure. |
| 435 | */ |
| 436 | static mode_t ibft_check_nic_for(void *data, int type) |
| 437 | { |
| 438 | struct ibft_kobject *entry = data; |
| 439 | struct ibft_nic *nic = entry->nic; |
| 440 | mode_t rc = 0; |
| 441 | |
| 442 | switch (type) { |
| 443 | case ISCSI_BOOT_ETH_INDEX: |
| 444 | case ISCSI_BOOT_ETH_FLAGS: |
| 445 | rc = S_IRUGO; |
| 446 | break; |
| 447 | case ISCSI_BOOT_ETH_IP_ADDR: |
| 448 | if (memcmp(nic->ip_addr, nulls, sizeof(nic->ip_addr))) |
| 449 | rc = S_IRUGO; |
| 450 | break; |
| 451 | case ISCSI_BOOT_ETH_SUBNET_MASK: |
| 452 | if (nic->subnet_mask_prefix) |
| 453 | rc = S_IRUGO; |
| 454 | break; |
| 455 | case ISCSI_BOOT_ETH_ORIGIN: |
| 456 | rc = S_IRUGO; |
| 457 | break; |
| 458 | case ISCSI_BOOT_ETH_GATEWAY: |
| 459 | if (memcmp(nic->gateway, nulls, sizeof(nic->gateway))) |
| 460 | rc = S_IRUGO; |
| 461 | break; |
| 462 | case ISCSI_BOOT_ETH_PRIMARY_DNS: |
| 463 | if (memcmp(nic->primary_dns, nulls, |
| 464 | sizeof(nic->primary_dns))) |
| 465 | rc = S_IRUGO; |
| 466 | break; |
| 467 | case ISCSI_BOOT_ETH_SECONDARY_DNS: |
| 468 | if (memcmp(nic->secondary_dns, nulls, |
| 469 | sizeof(nic->secondary_dns))) |
| 470 | rc = S_IRUGO; |
| 471 | break; |
| 472 | case ISCSI_BOOT_ETH_DHCP: |
| 473 | if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) |
| 474 | rc = S_IRUGO; |
| 475 | break; |
| 476 | case ISCSI_BOOT_ETH_VLAN: |
| 477 | case ISCSI_BOOT_ETH_MAC: |
| 478 | rc = S_IRUGO; |
| 479 | break; |
| 480 | case ISCSI_BOOT_ETH_HOSTNAME: |
| 481 | if (nic->hostname_off) |
| 482 | rc = S_IRUGO; |
| 483 | break; |
| 484 | default: |
| 485 | break; |
| 486 | } |
| 487 | |
| 488 | return rc; |
| 489 | } |
| 490 | |
| 491 | static mode_t __init ibft_check_tgt_for(void *data, int type) |
| 492 | { |
| 493 | struct ibft_kobject *entry = data; |
| 494 | struct ibft_tgt *tgt = entry->tgt; |
| 495 | mode_t rc = 0; |
| 496 | |
| 497 | switch (type) { |
| 498 | case ISCSI_BOOT_TGT_INDEX: |
| 499 | case ISCSI_BOOT_TGT_FLAGS: |
| 500 | case ISCSI_BOOT_TGT_IP_ADDR: |
| 501 | case ISCSI_BOOT_TGT_PORT: |
| 502 | case ISCSI_BOOT_TGT_LUN: |
| 503 | case ISCSI_BOOT_TGT_NIC_ASSOC: |
| 504 | case ISCSI_BOOT_TGT_CHAP_TYPE: |
| 505 | rc = S_IRUGO; |
| 506 | case ISCSI_BOOT_TGT_NAME: |
| 507 | if (tgt->tgt_name_len) |
| 508 | rc = S_IRUGO; |
| 509 | break; |
| 510 | case ISCSI_BOOT_TGT_CHAP_NAME: |
| 511 | case ISCSI_BOOT_TGT_CHAP_SECRET: |
| 512 | if (tgt->chap_name_len) |
| 513 | rc = S_IRUGO; |
| 514 | break; |
| 515 | case ISCSI_BOOT_TGT_REV_CHAP_NAME: |
| 516 | case ISCSI_BOOT_TGT_REV_CHAP_SECRET: |
| 517 | if (tgt->rev_chap_name_len) |
| 518 | rc = S_IRUGO; |
| 519 | break; |
| 520 | default: |
| 521 | break; |
| 522 | } |
| 523 | |
| 524 | return rc; |
| 525 | } |
| 526 | |
| 527 | static mode_t __init ibft_check_initiator_for(void *data, int type) |
| 528 | { |
| 529 | struct ibft_kobject *entry = data; |
| 530 | struct ibft_initiator *init = entry->initiator; |
| 531 | mode_t rc = 0; |
| 532 | |
| 533 | switch (type) { |
| 534 | case ISCSI_BOOT_INI_INDEX: |
| 535 | case ISCSI_BOOT_INI_FLAGS: |
| 536 | rc = S_IRUGO; |
| 537 | break; |
| 538 | case ISCSI_BOOT_INI_ISNS_SERVER: |
| 539 | if (memcmp(init->isns_server, nulls, |
| 540 | sizeof(init->isns_server))) |
| 541 | rc = S_IRUGO; |
| 542 | break; |
| 543 | case ISCSI_BOOT_INI_SLP_SERVER: |
| 544 | if (memcmp(init->slp_server, nulls, |
| 545 | sizeof(init->slp_server))) |
| 546 | rc = S_IRUGO; |
| 547 | break; |
| 548 | case ISCSI_BOOT_INI_PRI_RADIUS_SERVER: |
| 549 | if (memcmp(init->pri_radius_server, nulls, |
| 550 | sizeof(init->pri_radius_server))) |
| 551 | rc = S_IRUGO; |
| 552 | break; |
| 553 | case ISCSI_BOOT_INI_SEC_RADIUS_SERVER: |
| 554 | if (memcmp(init->sec_radius_server, nulls, |
| 555 | sizeof(init->sec_radius_server))) |
| 556 | rc = S_IRUGO; |
| 557 | break; |
| 558 | case ISCSI_BOOT_INI_INITIATOR_NAME: |
| 559 | if (init->initiator_name_len) |
| 560 | rc = S_IRUGO; |
| 561 | break; |
| 562 | default: |
| 563 | break; |
| 564 | } |
| 565 | |
| 566 | return rc; |
| 567 | } |
| 568 | |
Mike Christie | f457a46 | 2011-06-24 15:11:53 -0500 | [diff] [blame] | 569 | static void ibft_kobj_release(void *data) |
| 570 | { |
| 571 | kfree(data); |
| 572 | } |
| 573 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 574 | /* |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 575 | * Helper function for ibft_register_kobjects. |
| 576 | */ |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 577 | static int __init ibft_create_kobject(struct acpi_table_ibft *header, |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 578 | struct ibft_hdr *hdr) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 579 | { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 580 | struct iscsi_boot_kobj *boot_kobj = NULL; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 581 | struct ibft_kobject *ibft_kobj = NULL; |
| 582 | struct ibft_nic *nic = (struct ibft_nic *)hdr; |
| 583 | struct pci_dev *pci_dev; |
| 584 | int rc = 0; |
| 585 | |
| 586 | ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL); |
| 587 | if (!ibft_kobj) |
| 588 | return -ENOMEM; |
| 589 | |
| 590 | ibft_kobj->header = header; |
| 591 | ibft_kobj->hdr = hdr; |
| 592 | |
| 593 | switch (hdr->id) { |
| 594 | case id_initiator: |
| 595 | rc = ibft_verify_hdr("initiator", hdr, id_initiator, |
| 596 | sizeof(*ibft_kobj->initiator)); |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 597 | if (rc) |
| 598 | break; |
| 599 | |
| 600 | boot_kobj = iscsi_boot_create_initiator(boot_kset, hdr->index, |
| 601 | ibft_kobj, |
| 602 | ibft_attr_show_initiator, |
Mike Christie | f457a46 | 2011-06-24 15:11:53 -0500 | [diff] [blame] | 603 | ibft_check_initiator_for, |
| 604 | ibft_kobj_release); |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 605 | if (!boot_kobj) { |
| 606 | rc = -ENOMEM; |
| 607 | goto free_ibft_obj; |
| 608 | } |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 609 | break; |
| 610 | case id_nic: |
| 611 | rc = ibft_verify_hdr("ethernet", hdr, id_nic, |
| 612 | sizeof(*ibft_kobj->nic)); |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 613 | if (rc) |
| 614 | break; |
| 615 | |
| 616 | boot_kobj = iscsi_boot_create_ethernet(boot_kset, hdr->index, |
| 617 | ibft_kobj, |
| 618 | ibft_attr_show_nic, |
Mike Christie | f457a46 | 2011-06-24 15:11:53 -0500 | [diff] [blame] | 619 | ibft_check_nic_for, |
| 620 | ibft_kobj_release); |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 621 | if (!boot_kobj) { |
| 622 | rc = -ENOMEM; |
| 623 | goto free_ibft_obj; |
| 624 | } |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 625 | break; |
| 626 | case id_target: |
| 627 | rc = ibft_verify_hdr("target", hdr, id_target, |
| 628 | sizeof(*ibft_kobj->tgt)); |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 629 | if (rc) |
| 630 | break; |
| 631 | |
| 632 | boot_kobj = iscsi_boot_create_target(boot_kset, hdr->index, |
| 633 | ibft_kobj, |
| 634 | ibft_attr_show_target, |
Mike Christie | f457a46 | 2011-06-24 15:11:53 -0500 | [diff] [blame] | 635 | ibft_check_tgt_for, |
| 636 | ibft_kobj_release); |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 637 | if (!boot_kobj) { |
| 638 | rc = -ENOMEM; |
| 639 | goto free_ibft_obj; |
| 640 | } |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 641 | break; |
| 642 | case id_reserved: |
| 643 | case id_control: |
| 644 | case id_extensions: |
| 645 | /* Fields which we don't support. Ignore them */ |
| 646 | rc = 1; |
| 647 | break; |
| 648 | default: |
| 649 | printk(KERN_ERR "iBFT has unknown structure type (%d). " \ |
| 650 | "Report this bug to %.6s!\n", hdr->id, |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 651 | header->header.oem_id); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 652 | rc = 1; |
| 653 | break; |
| 654 | } |
| 655 | |
| 656 | if (rc) { |
| 657 | /* Skip adding this kobject, but exit with non-fatal error. */ |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 658 | rc = 0; |
| 659 | goto free_ibft_obj; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 662 | if (hdr->id == id_nic) { |
| 663 | /* |
| 664 | * We don't search for the device in other domains than |
| 665 | * zero. This is because on x86 platforms the BIOS |
| 666 | * executes only devices which are in domain 0. Furthermore, the |
| 667 | * iBFT spec doesn't have a domain id field :-( |
| 668 | */ |
| 669 | pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8, |
| 670 | (nic->pci_bdf & 0xff)); |
| 671 | if (pci_dev) { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 672 | rc = sysfs_create_link(&boot_kobj->kobj, |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 673 | &pci_dev->dev.kobj, "device"); |
| 674 | pci_dev_put(pci_dev); |
| 675 | } |
| 676 | } |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 677 | return 0; |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 678 | |
| 679 | free_ibft_obj: |
| 680 | kfree(ibft_kobj); |
| 681 | return rc; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | /* |
| 685 | * Scan the IBFT table structure for the NIC and Target fields. When |
| 686 | * found add them on the passed-in list. We do not support the other |
| 687 | * fields at this point, so they are skipped. |
| 688 | */ |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 689 | static int __init ibft_register_kobjects(struct acpi_table_ibft *header) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 690 | { |
| 691 | struct ibft_control *control = NULL; |
| 692 | void *ptr, *end; |
| 693 | int rc = 0; |
| 694 | u16 offset; |
| 695 | u16 eot_offset; |
| 696 | |
| 697 | control = (void *)header + sizeof(*header); |
| 698 | end = (void *)control + control->hdr.length; |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 699 | eot_offset = (void *)header + header->header.length - (void *)control; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 700 | rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control, |
| 701 | sizeof(*control)); |
| 702 | |
| 703 | /* iBFT table safety checking */ |
| 704 | rc |= ((control->hdr.index) ? -ENODEV : 0); |
| 705 | if (rc) { |
| 706 | printk(KERN_ERR "iBFT error: Control header is invalid!\n"); |
| 707 | return rc; |
| 708 | } |
| 709 | for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { |
| 710 | offset = *(u16 *)ptr; |
Peter Jones | 4e639fd | 2010-02-25 15:37:17 -0500 | [diff] [blame] | 711 | if (offset && offset < header->header.length && |
| 712 | offset < eot_offset) { |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 713 | rc = ibft_create_kobject(header, |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 714 | (void *)header + offset); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 715 | if (rc) |
| 716 | break; |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | return rc; |
| 721 | } |
| 722 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 723 | static void ibft_unregister(void) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 724 | { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 725 | struct iscsi_boot_kobj *boot_kobj, *tmp_kobj; |
| 726 | struct ibft_kobject *ibft_kobj; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 727 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 728 | list_for_each_entry_safe(boot_kobj, tmp_kobj, |
| 729 | &boot_kset->kobj_list, list) { |
| 730 | ibft_kobj = boot_kobj->data; |
| 731 | if (ibft_kobj->hdr->id == id_nic) |
| 732 | sysfs_remove_link(&boot_kobj->kobj, "device"); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 733 | }; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 734 | } |
| 735 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 736 | static void ibft_cleanup(void) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 737 | { |
Konrad Rzeszutek Wilk | a12415f | 2010-08-11 16:35:40 -0400 | [diff] [blame] | 738 | if (boot_kset) { |
| 739 | ibft_unregister(); |
| 740 | iscsi_boot_destroy_kset(boot_kset); |
| 741 | } |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 742 | } |
| 743 | |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 744 | static void __exit ibft_exit(void) |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 745 | { |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 746 | ibft_cleanup(); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 747 | } |
| 748 | |
Yinghai Lu | 935a9fe | 2011-12-12 12:39:14 -0800 | [diff] [blame] | 749 | #ifdef CONFIG_ACPI |
| 750 | static const struct { |
| 751 | char *sign; |
| 752 | } ibft_signs[] = { |
| 753 | /* |
| 754 | * One spec says "IBFT", the other says "iBFT". We have to check |
| 755 | * for both. |
| 756 | */ |
| 757 | { ACPI_SIG_IBFT }, |
| 758 | { "iBFT" }, |
| 759 | }; |
| 760 | |
| 761 | static void __init acpi_find_ibft_region(void) |
| 762 | { |
| 763 | int i; |
| 764 | struct acpi_table_header *table = NULL; |
| 765 | |
| 766 | if (acpi_disabled) |
| 767 | return; |
| 768 | |
| 769 | for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++) { |
| 770 | acpi_get_table(ibft_signs[i].sign, 0, &table); |
| 771 | ibft_addr = (struct acpi_table_ibft *)table; |
| 772 | } |
| 773 | } |
| 774 | #else |
| 775 | static void __init acpi_find_ibft_region(void) |
| 776 | { |
| 777 | } |
| 778 | #endif |
| 779 | |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 780 | /* |
| 781 | * ibft_init() - creates sysfs tree entries for the iBFT data. |
| 782 | */ |
| 783 | static int __init ibft_init(void) |
| 784 | { |
| 785 | int rc = 0; |
| 786 | |
Yinghai Lu | 935a9fe | 2011-12-12 12:39:14 -0800 | [diff] [blame] | 787 | /* |
| 788 | As on UEFI systems the setup_arch()/find_ibft_region() |
| 789 | is called before ACPI tables are parsed and it only does |
| 790 | legacy finding. |
| 791 | */ |
| 792 | if (!ibft_addr) |
| 793 | acpi_find_ibft_region(); |
| 794 | |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 795 | if (ibft_addr) { |
Yinghai Lu | 935a9fe | 2011-12-12 12:39:14 -0800 | [diff] [blame] | 796 | pr_info("iBFT detected.\n"); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 797 | |
| 798 | rc = ibft_check_device(); |
| 799 | if (rc) |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 800 | return rc; |
| 801 | |
| 802 | boot_kset = iscsi_boot_create_kset("ibft"); |
| 803 | if (!boot_kset) |
| 804 | return -ENOMEM; |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 805 | |
| 806 | /* Scan the IBFT for data and register the kobjects. */ |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 807 | rc = ibft_register_kobjects(ibft_addr); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 808 | if (rc) |
| 809 | goto out_free; |
| 810 | } else |
| 811 | printk(KERN_INFO "No iBFT detected.\n"); |
| 812 | |
| 813 | return 0; |
| 814 | |
| 815 | out_free: |
Mike Christie | b33a84a | 2010-04-12 18:06:18 +0000 | [diff] [blame] | 816 | ibft_cleanup(); |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 817 | return rc; |
| 818 | } |
| 819 | |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 820 | module_init(ibft_init); |
| 821 | module_exit(ibft_exit); |