include/linux/ethtool.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * ethtool.h: Defines for Linux ethtool.
   4  *
   5  * Copyright (C) 1998 David S. Miller (davem@redhat.com)
   6  * Copyright 2001 Jeff Garzik <jgarzik@pobox.com>
   7  * Portions Copyright 2001 Sun Microsystems (thockin@sun.com)
   8  * Portions Copyright 2002 Intel (eli.kupermann@intel.com,
   9  *                                christopher.leech@intel.com,
  10  *                                scott.feldman@intel.com)
  11  * Portions Copyright (C) Sun Microsystems 2008
  12  */
  13 #ifndef _LINUX_ETHTOOL_H
  14 #define _LINUX_ETHTOOL_H
  15
  16 #include <linux/bitmap.h>
  17 #include <linux/compat.h>
  18 #include <uapi/linux/ethtool.h>
  19
  20 #ifdef CONFIG_COMPAT
  21
  22 struct compat_ethtool_rx_flow_spec {
  23         u32             flow_type;
  24         union ethtool_flow_union h_u;
  25         struct ethtool_flow_ext h_ext;
  26         union ethtool_flow_union m_u;
  27         struct ethtool_flow_ext m_ext;
  28         compat_u64      ring_cookie;
  29         u32             location;
  30 };
  31
  32 struct compat_ethtool_rxnfc {
  33         u32                             cmd;
  34         u32                             flow_type;
  35         compat_u64                      data;
  36         struct compat_ethtool_rx_flow_spec fs;
  37         u32                             rule_cnt;
  38         u32                             rule_locs[0];
  39 };
  40
  41 #endif /* CONFIG_COMPAT */
  42
  43 #include <linux/rculist.h>
  44
  45 /**
  46  * enum ethtool_phys_id_state - indicator state for physical identification
  47  * @ETHTOOL_ID_INACTIVE: Physical ID indicator should be deactivated
  48  * @ETHTOOL_ID_ACTIVE: Physical ID indicator should be activated
  49  * @ETHTOOL_ID_ON: LED should be turned on (used iff %ETHTOOL_ID_ACTIVE
  50  *      is not supported)
  51  * @ETHTOOL_ID_OFF: LED should be turned off (used iff %ETHTOOL_ID_ACTIVE
  52  *      is not supported)
  53  */
  54 enum ethtool_phys_id_state {
  55         ETHTOOL_ID_INACTIVE,
  56         ETHTOOL_ID_ACTIVE,
  57         ETHTOOL_ID_ON,
  58         ETHTOOL_ID_OFF
  59 };
  60
  61 enum {
  62         ETH_RSS_HASH_TOP_BIT, /* Configurable RSS hash function - Toeplitz */
  63         ETH_RSS_HASH_XOR_BIT, /* Configurable RSS hash function - Xor */
  64         ETH_RSS_HASH_CRC32_BIT, /* Configurable RSS hash function - Crc32 */
  65
  66         /*
  67          * Add your fresh new hash function bits above and remember to update
  68          * rss_hash_func_strings[] in ethtool.c
  69          */
  70         ETH_RSS_HASH_FUNCS_COUNT
  71 };
  72
  73 #define __ETH_RSS_HASH_BIT(bit) ((u32)1 << (bit))
  74 #define __ETH_RSS_HASH(name)    __ETH_RSS_HASH_BIT(ETH_RSS_HASH_##name##_BIT)
  75
  76 #define ETH_RSS_HASH_TOP        __ETH_RSS_HASH(TOP)
  77 #define ETH_RSS_HASH_XOR        __ETH_RSS_HASH(XOR)
  78 #define ETH_RSS_HASH_CRC32      __ETH_RSS_HASH(CRC32)
  79
  80 #define ETH_RSS_HASH_UNKNOWN    0
  81 #define ETH_RSS_HASH_NO_CHANGE  0
  82
  83 struct net_device;
  84
  85 /* Some generic methods drivers may use in their ethtool_ops */
  86 u32 ethtool_op_get_link(struct net_device *dev);
  87 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *eti);
  88
  89 /**
  90  * ethtool_rxfh_indir_default - get default value for RX flow hash indirection
  91  * @index: Index in RX flow hash indirection table
  92  * @n_rx_rings: Number of RX rings to use
  93  *
  94  * This function provides the default policy for RX flow hash indirection.
  95  */
  96 static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
  97 {
  98         return index % n_rx_rings;
  99 }
 100
 101 /* declare a link mode bitmap */
 102 #define __ETHTOOL_DECLARE_LINK_MODE_MASK(name)          \
 103         DECLARE_BITMAP(name, __ETHTOOL_LINK_MODE_MASK_NBITS)
 104
 105 /* drivers must ignore base.cmd and base.link_mode_masks_nwords
 106  * fields, but they are allowed to overwrite them (will be ignored).
 107  */
 108 struct ethtool_link_ksettings {
 109         struct ethtool_link_settings base;
 110         struct {
 111                 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
 112                 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
 113                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
 114         } link_modes;
 115 };
 116
 117 /**
 118  * ethtool_link_ksettings_zero_link_mode - clear link_ksettings link mode mask
 119  *   @ptr : pointer to struct ethtool_link_ksettings
 120  *   @name : one of supported/advertising/lp_advertising
 121  */
 122 #define ethtool_link_ksettings_zero_link_mode(ptr, name)                \
 123         bitmap_zero((ptr)->link_modes.name, __ETHTOOL_LINK_MODE_MASK_NBITS)
 124
 125 /**
 126  * ethtool_link_ksettings_add_link_mode - set bit in link_ksettings
 127  * link mode mask
 128  *   @ptr : pointer to struct ethtool_link_ksettings
 129  *   @name : one of supported/advertising/lp_advertising
 130  *   @mode : one of the ETHTOOL_LINK_MODE_*_BIT
 131  * (not atomic, no bound checking)
 132  */
 133 #define ethtool_link_ksettings_add_link_mode(ptr, name, mode)           \
 134         __set_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
 135
 136 /**
 137  * ethtool_link_ksettings_del_link_mode - clear bit in link_ksettings
 138  * link mode mask
 139  *   @ptr : pointer to struct ethtool_link_ksettings
 140  *   @name : one of supported/advertising/lp_advertising
 141  *   @mode : one of the ETHTOOL_LINK_MODE_*_BIT
 142  * (not atomic, no bound checking)
 143  */
 144 #define ethtool_link_ksettings_del_link_mode(ptr, name, mode)           \
 145         __clear_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
 146
 147 /**
 148  * ethtool_link_ksettings_test_link_mode - test bit in ksettings link mode mask
 149  *   @ptr : pointer to struct ethtool_link_ksettings
 150  *   @name : one of supported/advertising/lp_advertising
 151  *   @mode : one of the ETHTOOL_LINK_MODE_*_BIT
 152  * (not atomic, no bound checking)
 153  *
 154  * Returns true/false.
 155  */
 156 #define ethtool_link_ksettings_test_link_mode(ptr, name, mode)          \
 157         test_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
 158
 159 extern int
 160 __ethtool_get_link_ksettings(struct net_device *dev,
 161                              struct ethtool_link_ksettings *link_ksettings);
 162
 163 /**
 164  * ethtool_intersect_link_masks - Given two link masks, AND them together
 165  * @dst: first mask and where result is stored
 166  * @src: second mask to intersect with
 167  *
 168  * Given two link mode masks, AND them together and save the result in dst.
 169  */
 170 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 171                                   struct ethtool_link_ksettings *src);
 172
 173 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 174                                              u32 legacy_u32);
 175
 176 /* return false if src had higher bits set. lower bits always updated. */
 177 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 178                                      const unsigned long *src);
 179
 180 /**
 181  * struct ethtool_ops - optional netdev operations
 182  * @get_drvinfo: Report driver/device information.  Should only set the
 183  *      @driver, @version, @fw_version and @bus_info fields.  If not
 184  *      implemented, the @driver and @bus_info fields will be filled in
 185  *      according to the netdev's parent device.
 186  * @get_regs_len: Get buffer length required for @get_regs
 187  * @get_regs: Get device registers
 188  * @get_wol: Report whether Wake-on-Lan is enabled
 189  * @set_wol: Turn Wake-on-Lan on or off.  Returns a negative error code
 190  *      or zero.
 191  * @get_msglevel: Report driver message level.  This should be the value
 192  *      of the @msg_enable field used by netif logging functions.
 193  * @set_msglevel: Set driver message level
 194  * @nway_reset: Restart autonegotiation.  Returns a negative error code
 195  *      or zero.
 196  * @get_link: Report whether physical link is up.  Will only be called if
 197  *      the netdev is up.  Should usually be set to ethtool_op_get_link(),
 198  *      which uses netif_carrier_ok().
 199  * @get_eeprom: Read data from the device EEPROM.
 200  *      Should fill in the magic field.  Don't need to check len for zero
 201  *      or wraparound.  Fill in the data argument with the eeprom values
 202  *      from offset to offset + len.  Update len to the amount read.
 203  *      Returns an error or zero.
 204  * @set_eeprom: Write data to the device EEPROM.
 205  *      Should validate the magic field.  Don't need to check len for zero
 206  *      or wraparound.  Update len to the amount written.  Returns an error
 207  *      or zero.
 208  * @get_coalesce: Get interrupt coalescing parameters.  Returns a negative
 209  *      error code or zero.
 210  * @set_coalesce: Set interrupt coalescing parameters.  Returns a negative
 211  *      error code or zero.
 212  * @get_ringparam: Report ring sizes
 213  * @set_ringparam: Set ring sizes.  Returns a negative error code or zero.
 214  * @get_pauseparam: Report pause parameters
 215  * @set_pauseparam: Set pause parameters.  Returns a negative error code
 216  *      or zero.
 217  * @self_test: Run specified self-tests
 218  * @get_strings: Return a set of strings that describe the requested objects
 219  * @set_phys_id: Identify the physical devices, e.g. by flashing an LED
 220  *      attached to it.  The implementation may update the indicator
 221  *      asynchronously or synchronously, but in either case it must return
 222  *      quickly.  It is initially called with the argument %ETHTOOL_ID_ACTIVE,
 223  *      and must either activate asynchronous updates and return zero, return
 224  *      a negative error or return a positive frequency for synchronous
 225  *      indication (e.g. 1 for one on/off cycle per second).  If it returns
 226  *      a frequency then it will be called again at intervals with the
 227  *      argument %ETHTOOL_ID_ON or %ETHTOOL_ID_OFF and should set the state of
 228  *      the indicator accordingly.  Finally, it is called with the argument
 229  *      %ETHTOOL_ID_INACTIVE and must deactivate the indicator.  Returns a
 230  *      negative error code or zero.
 231  * @get_ethtool_stats: Return extended statistics about the device.
 232  *      This is only useful if the device maintains statistics not
 233  *      included in &struct rtnl_link_stats64.
 234  * @begin: Function to be called before any other operation.  Returns a
 235  *      negative error code or zero.
 236  * @complete: Function to be called after any other operation except
 237  *      @begin.  Will be called even if the other operation failed.
 238  * @get_priv_flags: Report driver-specific feature flags.
 239  * @set_priv_flags: Set driver-specific feature flags.  Returns a negative
 240  *      error code or zero.
 241  * @get_sset_count: Get number of strings that @get_strings will write.
 242  * @get_rxnfc: Get RX flow classification rules.  Returns a negative
 243  *      error code or zero.
 244  * @set_rxnfc: Set RX flow classification rules.  Returns a negative
 245  *      error code or zero.
 246  * @flash_device: Write a firmware image to device's flash memory.
 247  *      Returns a negative error code or zero.
 248  * @reset: Reset (part of) the device, as specified by a bitmask of
 249  *      flags from &enum ethtool_reset_flags.  Returns a negative
 250  *      error code or zero.
 251  * @get_rxfh_key_size: Get the size of the RX flow hash key.
 252  *      Returns zero if not supported for this specific device.
 253  * @get_rxfh_indir_size: Get the size of the RX flow hash indirection table.
 254  *      Returns zero if not supported for this specific device.
 255  * @get_rxfh: Get the contents of the RX flow hash indirection table, hash key
 256  *      and/or hash function.
 257  *      Returns a negative error code or zero.
 258  * @set_rxfh: Set the contents of the RX flow hash indirection table, hash
 259  *      key, and/or hash function.  Arguments which are set to %NULL or zero
 260  *      will remain unchanged.
 261  *      Returns a negative error code or zero. An error code must be returned
 262  *      if at least one unsupported change was requested.
 263  * @get_rxfh_context: Get the contents of the RX flow hash indirection table,
 264  *      hash key, and/or hash function assiciated to the given rss context.
 265  *      Returns a negative error code or zero.
 266  * @set_rxfh_context: Create, remove and configure RSS contexts. Allows setting
 267  *      the contents of the RX flow hash indirection table, hash key, and/or
 268  *      hash function associated to the given context. Arguments which are set
 269  *      to %NULL or zero will remain unchanged.
 270  *      Returns a negative error code or zero. An error code must be returned
 271  *      if at least one unsupported change was requested.
 272  * @get_channels: Get number of channels.
 273  * @set_channels: Set number of channels.  Returns a negative error code or
 274  *      zero.
 275  * @get_dump_flag: Get dump flag indicating current dump length, version,
 276  *                 and flag of the device.
 277  * @get_dump_data: Get dump data.
 278  * @set_dump: Set dump specific flags to the device.
 279  * @get_ts_info: Get the time stamping and PTP hardware clock capabilities.
 280  *      Drivers supporting transmit time stamps in software should set this to
 281  *      ethtool_op_get_ts_info().
 282  * @get_module_info: Get the size and type of the eeprom contained within
 283  *      a plug-in module.
 284  * @get_module_eeprom: Get the eeprom information from the plug-in module
 285  * @get_eee: Get Energy-Efficient (EEE) supported and status.
 286  * @set_eee: Set EEE status (enable/disable) as well as LPI timers.
 287  * @get_per_queue_coalesce: Get interrupt coalescing parameters per queue.
 288  *      It must check that the given queue number is valid. If neither a RX nor
 289  *      a TX queue has this number, return -EINVAL. If only a RX queue or a TX
 290  *      queue has this number, set the inapplicable fields to ~0 and return 0.
 291  *      Returns a negative error code or zero.
 292  * @set_per_queue_coalesce: Set interrupt coalescing parameters per queue.
 293  *      It must check that the given queue number is valid. If neither a RX nor
 294  *      a TX queue has this number, return -EINVAL. If only a RX queue or a TX
 295  *      queue has this number, ignore the inapplicable fields.
 296  *      Returns a negative error code or zero.
 297  * @get_link_ksettings: Get various device settings including Ethernet link
 298  *      settings. The %cmd and %link_mode_masks_nwords fields should be
 299  *      ignored (use %__ETHTOOL_LINK_MODE_MASK_NBITS instead of the latter),
 300  *      any change to them will be overwritten by kernel. Returns a negative
 301  *      error code or zero.
 302  * @set_link_ksettings: Set various device settings including Ethernet link
 303  *      settings. The %cmd and %link_mode_masks_nwords fields should be
 304  *      ignored (use %__ETHTOOL_LINK_MODE_MASK_NBITS instead of the latter),
 305  *      any change to them will be overwritten by kernel. Returns a negative
 306  *      error code or zero.
 307  * @get_fecparam: Get the network device Forward Error Correction parameters.
 308  * @set_fecparam: Set the network device Forward Error Correction parameters.
 309  * @get_ethtool_phy_stats: Return extended statistics about the PHY device.
 310  *      This is only useful if the device maintains PHY statistics and
 311  *      cannot use the standard PHY library helpers.
 312  *
 313  * All operations are optional (i.e. the function pointer may be set
 314  * to %NULL) and callers must take this into account.  Callers must
 315  * hold the RTNL lock.
 316  *
 317  * See the structures used by these operations for further documentation.
 318  * Note that for all operations using a structure ending with a zero-
 319  * length array, the array is allocated separately in the kernel and
 320  * is passed to the driver as an additional parameter.
 321  *
 322  * See &struct net_device and &struct net_device_ops for documentation
 323  * of the generic netdev features interface.
 324  */
 325 struct ethtool_ops {
 326         void    (*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *);
 327         int     (*get_regs_len)(struct net_device *);
 328         void    (*get_regs)(struct net_device *, struct ethtool_regs *, void *);
 329         void    (*get_wol)(struct net_device *, struct ethtool_wolinfo *);
 330         int     (*set_wol)(struct net_device *, struct ethtool_wolinfo *);
 331         u32     (*get_msglevel)(struct net_device *);
 332         void    (*set_msglevel)(struct net_device *, u32);
 333         int     (*nway_reset)(struct net_device *);
 334         u32     (*get_link)(struct net_device *);
 335         int     (*get_eeprom_len)(struct net_device *);
 336         int     (*get_eeprom)(struct net_device *,
 337                               struct ethtool_eeprom *, u8 *);
 338         int     (*set_eeprom)(struct net_device *,
 339                               struct ethtool_eeprom *, u8 *);
 340         int     (*get_coalesce)(struct net_device *, struct ethtool_coalesce *);
 341         int     (*set_coalesce)(struct net_device *, struct ethtool_coalesce *);
 342         void    (*get_ringparam)(struct net_device *,
 343                                  struct ethtool_ringparam *);
 344         int     (*set_ringparam)(struct net_device *,
 345                                  struct ethtool_ringparam *);
 346         void    (*get_pauseparam)(struct net_device *,
 347                                   struct ethtool_pauseparam*);
 348         int     (*set_pauseparam)(struct net_device *,
 349                                   struct ethtool_pauseparam*);
 350         void    (*self_test)(struct net_device *, struct ethtool_test *, u64 *);
 351         void    (*get_strings)(struct net_device *, u32 stringset, u8 *);
 352         int     (*set_phys_id)(struct net_device *, enum ethtool_phys_id_state);
 353         void    (*get_ethtool_stats)(struct net_device *,
 354                                      struct ethtool_stats *, u64 *);
 355         int     (*begin)(struct net_device *);
 356         void    (*complete)(struct net_device *);
 357         u32     (*get_priv_flags)(struct net_device *);
 358         int     (*set_priv_flags)(struct net_device *, u32);
 359         int     (*get_sset_count)(struct net_device *, int);
 360         int     (*get_rxnfc)(struct net_device *,
 361                              struct ethtool_rxnfc *, u32 *rule_locs);
 362         int     (*set_rxnfc)(struct net_device *, struct ethtool_rxnfc *);
 363         int     (*flash_device)(struct net_device *, struct ethtool_flash *);
 364         int     (*reset)(struct net_device *, u32 *);
 365         u32     (*get_rxfh_key_size)(struct net_device *);
 366         u32     (*get_rxfh_indir_size)(struct net_device *);
 367         int     (*get_rxfh)(struct net_device *, u32 *indir, u8 *key,
 368                             u8 *hfunc);
 369         int     (*set_rxfh)(struct net_device *, const u32 *indir,
 370                             const u8 *key, const u8 hfunc);
 371         int     (*get_rxfh_context)(struct net_device *, u32 *indir, u8 *key,
 372                                     u8 *hfunc, u32 rss_context);
 373         int     (*set_rxfh_context)(struct net_device *, const u32 *indir,
 374                                     const u8 *key, const u8 hfunc,
 375                                     u32 *rss_context, bool delete);
 376         void    (*get_channels)(struct net_device *, struct ethtool_channels *);
 377         int     (*set_channels)(struct net_device *, struct ethtool_channels *);
 378         int     (*get_dump_flag)(struct net_device *, struct ethtool_dump *);
 379         int     (*get_dump_data)(struct net_device *,
 380                                  struct ethtool_dump *, void *);
 381         int     (*set_dump)(struct net_device *, struct ethtool_dump *);
 382         int     (*get_ts_info)(struct net_device *, struct ethtool_ts_info *);
 383         int     (*get_module_info)(struct net_device *,
 384                                    struct ethtool_modinfo *);
 385         int     (*get_module_eeprom)(struct net_device *,
 386                                      struct ethtool_eeprom *, u8 *);
 387         int     (*get_eee)(struct net_device *, struct ethtool_eee *);
 388         int     (*set_eee)(struct net_device *, struct ethtool_eee *);
 389         int     (*get_tunable)(struct net_device *,
 390                                const struct ethtool_tunable *, void *);
 391         int     (*set_tunable)(struct net_device *,
 392                                const struct ethtool_tunable *, const void *);
 393         int     (*get_per_queue_coalesce)(struct net_device *, u32,
 394                                           struct ethtool_coalesce *);
 395         int     (*set_per_queue_coalesce)(struct net_device *, u32,
 396                                           struct ethtool_coalesce *);
 397         int     (*get_link_ksettings)(struct net_device *,
 398                                       struct ethtool_link_ksettings *);
 399         int     (*set_link_ksettings)(struct net_device *,
 400                                       const struct ethtool_link_ksettings *);
 401         int     (*get_fecparam)(struct net_device *,
 402                                       struct ethtool_fecparam *);
 403         int     (*set_fecparam)(struct net_device *,
 404                                       struct ethtool_fecparam *);
 405         void    (*get_ethtool_phy_stats)(struct net_device *,
 406                                          struct ethtool_stats *, u64 *);
 407 };
 408
 409 struct ethtool_rx_flow_rule {
 410         struct flow_rule        *rule;
 411         unsigned long           priv[0];
 412 };
 413
 414 struct ethtool_rx_flow_spec_input {
 415         const struct ethtool_rx_flow_spec       *fs;
 416         u32                                     rss_ctx;
 417 };
 418
 419 struct ethtool_rx_flow_rule *
 420 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input);
 421 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *rule);
 422
 423 #endif /* _LINUX_ETHTOOL_H */