drivers/net/ethernet/sfc/mcdi.h

   1 /****************************************************************************
   2  * Driver for Solarflare network controllers and boards
   3  * Copyright 2008-2013 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9
  10 #ifndef EFX_MCDI_H
  11 #define EFX_MCDI_H
  12
  13 /**
  14  * enum efx_mcdi_state - MCDI request handling state
  15  * @MCDI_STATE_QUIESCENT: No pending MCDI requests. If the caller holds the
  16  *      mcdi @iface_lock then they are able to move to %MCDI_STATE_RUNNING
  17  * @MCDI_STATE_RUNNING_SYNC: There is a synchronous MCDI request pending.
  18  *      Only the thread that moved into this state is allowed to move out of it.
  19  * @MCDI_STATE_RUNNING_ASYNC: There is an asynchronous MCDI request pending.
  20  * @MCDI_STATE_PROXY_WAIT: An MCDI request has completed with a response that
  21  *      indicates we must wait for a proxy try again message.
  22  * @MCDI_STATE_COMPLETED: An MCDI request has completed, but the owning thread
  23  *      has not yet consumed the result. For all other threads, equivalent to
  24  *      %MCDI_STATE_RUNNING.
  25  */
  26 enum efx_mcdi_state {
  27         MCDI_STATE_QUIESCENT,
  28         MCDI_STATE_RUNNING_SYNC,
  29         MCDI_STATE_RUNNING_ASYNC,
  30         MCDI_STATE_PROXY_WAIT,
  31         MCDI_STATE_COMPLETED,
  32 };
  33
  34 /**
  35  * enum efx_mcdi_mode - MCDI transaction mode
  36  * @MCDI_MODE_POLL: poll for MCDI completion, until timeout
  37  * @MCDI_MODE_EVENTS: wait for an mcdi_event.  On timeout, poll once
  38  * @MCDI_MODE_FAIL: we think MCDI is dead, so fail-fast all calls
  39  */
  40 enum efx_mcdi_mode {
  41         MCDI_MODE_POLL,
  42         MCDI_MODE_EVENTS,
  43         MCDI_MODE_FAIL,
  44 };
  45
  46 /**
  47  * struct efx_mcdi_iface - MCDI protocol context
  48  * @efx: The associated NIC.
  49  * @state: Request handling state. Waited for by @wq.
  50  * @mode: Poll for mcdi completion, or wait for an mcdi_event.
  51  * @wq: Wait queue for threads waiting for @state != %MCDI_STATE_RUNNING
  52  * @new_epoch: Indicates start of day or start of MC reboot recovery
  53  * @iface_lock: Serialises access to @seqno, @credits and response metadata
  54  * @seqno: The next sequence number to use for mcdi requests.
  55  * @credits: Number of spurious MCDI completion events allowed before we
  56  *     trigger a fatal error
  57  * @resprc: Response error/success code (Linux numbering)
  58  * @resp_hdr_len: Response header length
  59  * @resp_data_len: Response data (SDU or error) length
  60  * @async_lock: Serialises access to @async_list while event processing is
  61  *      enabled
  62  * @async_list: Queue of asynchronous requests
  63  * @async_timer: Timer for asynchronous request timeout
  64  * @logging_buffer: buffer that may be used to build MCDI tracing messages
  65  * @logging_enabled: whether to trace MCDI
  66  * @proxy_rx_handle: Most recently received proxy authorisation handle
  67  * @proxy_rx_status: Status of most recent proxy authorisation
  68  * @proxy_rx_wq: Wait queue for updates to proxy_rx_handle
  69  */
  70 struct efx_mcdi_iface {
  71         struct efx_nic *efx;
  72         enum efx_mcdi_state state;
  73         enum efx_mcdi_mode mode;
  74         wait_queue_head_t wq;
  75         spinlock_t iface_lock;
  76         bool new_epoch;
  77         unsigned int credits;
  78         unsigned int seqno;
  79         int resprc;
  80         int resprc_raw;
  81         size_t resp_hdr_len;
  82         size_t resp_data_len;
  83         spinlock_t async_lock;
  84         struct list_head async_list;
  85         struct timer_list async_timer;
  86 #ifdef CONFIG_SFC_MCDI_LOGGING
  87         char *logging_buffer;
  88         bool logging_enabled;
  89 #endif
  90         unsigned int proxy_rx_handle;
  91         int proxy_rx_status;
  92         wait_queue_head_t proxy_rx_wq;
  93 };
  94
  95 struct efx_mcdi_mon {
  96         struct efx_buffer dma_buf;
  97         struct mutex update_lock;
  98         unsigned long last_update;
  99         struct device *device;
 100         struct efx_mcdi_mon_attribute *attrs;
 101         struct attribute_group group;
 102         const struct attribute_group *groups[2];
 103         unsigned int n_attrs;
 104 };
 105
 106 struct efx_mcdi_mtd_partition {
 107         struct efx_mtd_partition common;
 108         bool updating;
 109         u16 nvram_type;
 110         u16 fw_subtype;
 111 };
 112
 113 #define to_efx_mcdi_mtd_partition(mtd)                          \
 114         container_of(mtd, struct efx_mcdi_mtd_partition, common.mtd)
 115
 116 /**
 117  * struct efx_mcdi_data - extra state for NICs that implement MCDI
 118  * @iface: Interface/protocol state
 119  * @hwmon: Hardware monitor state
 120  * @fn_flags: Flags for this function, as returned by %MC_CMD_DRV_ATTACH.
 121  */
 122 struct efx_mcdi_data {
 123         struct efx_mcdi_iface iface;
 124 #ifdef CONFIG_SFC_MCDI_MON
 125         struct efx_mcdi_mon hwmon;
 126 #endif
 127         u32 fn_flags;
 128 };
 129
 130 static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
 131 {
 132         EFX_WARN_ON_PARANOID(!efx->mcdi);
 133         return &efx->mcdi->iface;
 134 }
 135
 136 #ifdef CONFIG_SFC_MCDI_MON
 137 static inline struct efx_mcdi_mon *efx_mcdi_mon(struct efx_nic *efx)
 138 {
 139         EFX_WARN_ON_PARANOID(!efx->mcdi);
 140         return &efx->mcdi->hwmon;
 141 }
 142 #endif
 143
 144 int efx_mcdi_init(struct efx_nic *efx);
 145 void efx_mcdi_detach(struct efx_nic *efx);
 146 void efx_mcdi_fini(struct efx_nic *efx);
 147
 148 int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd, const efx_dword_t *inbuf,
 149                  size_t inlen, efx_dword_t *outbuf, size_t outlen,
 150                  size_t *outlen_actual);
 151 int efx_mcdi_rpc_quiet(struct efx_nic *efx, unsigned cmd,
 152                        const efx_dword_t *inbuf, size_t inlen,
 153                        efx_dword_t *outbuf, size_t outlen,
 154                        size_t *outlen_actual);
 155
 156 int efx_mcdi_rpc_start(struct efx_nic *efx, unsigned cmd,
 157                        const efx_dword_t *inbuf, size_t inlen);
 158 int efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned cmd, size_t inlen,
 159                         efx_dword_t *outbuf, size_t outlen,
 160                         size_t *outlen_actual);
 161 int efx_mcdi_rpc_finish_quiet(struct efx_nic *efx, unsigned cmd,
 162                               size_t inlen, efx_dword_t *outbuf,
 163                               size_t outlen, size_t *outlen_actual);
 164
 165 typedef void efx_mcdi_async_completer(struct efx_nic *efx,
 166                                       unsigned long cookie, int rc,
 167                                       efx_dword_t *outbuf,
 168                                       size_t outlen_actual);
 169 int efx_mcdi_rpc_async(struct efx_nic *efx, unsigned int cmd,
 170                        const efx_dword_t *inbuf, size_t inlen, size_t outlen,
 171                        efx_mcdi_async_completer *complete,
 172                        unsigned long cookie);
 173 int efx_mcdi_rpc_async_quiet(struct efx_nic *efx, unsigned int cmd,
 174                              const efx_dword_t *inbuf, size_t inlen,
 175                              size_t outlen,
 176                              efx_mcdi_async_completer *complete,
 177                              unsigned long cookie);
 178
 179 void efx_mcdi_display_error(struct efx_nic *efx, unsigned cmd,
 180                             size_t inlen, efx_dword_t *outbuf,
 181                             size_t outlen, int rc);
 182
 183 int efx_mcdi_poll_reboot(struct efx_nic *efx);
 184 void efx_mcdi_mode_poll(struct efx_nic *efx);
 185 void efx_mcdi_mode_event(struct efx_nic *efx);
 186 void efx_mcdi_flush_async(struct efx_nic *efx);
 187
 188 void efx_mcdi_process_event(struct efx_channel *channel, efx_qword_t *event);
 189 void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev);
 190
 191 /* We expect that 16- and 32-bit fields in MCDI requests and responses
 192  * are appropriately aligned, but 64-bit fields are only
 193  * 32-bit-aligned.  Also, on Siena we must copy to the MC shared
 194  * memory strictly 32 bits at a time, so add any necessary padding.
 195  */
 196 #define _MCDI_DECLARE_BUF(_name, _len)                                  \
 197         efx_dword_t _name[DIV_ROUND_UP(_len, 4)]
 198 #define MCDI_DECLARE_BUF(_name, _len)                                   \
 199         _MCDI_DECLARE_BUF(_name, _len) = {{{0}}}
 200 #define MCDI_DECLARE_BUF_ERR(_name)                                     \
 201         MCDI_DECLARE_BUF(_name, 8)
 202 #define _MCDI_PTR(_buf, _offset)                                        \
 203         ((u8 *)(_buf) + (_offset))
 204 #define MCDI_PTR(_buf, _field)                                          \
 205         _MCDI_PTR(_buf, MC_CMD_ ## _field ## _OFST)
 206 #define _MCDI_CHECK_ALIGN(_ofst, _align)                                \
 207         ((_ofst) + BUILD_BUG_ON_ZERO((_ofst) & (_align - 1)))
 208 #define _MCDI_DWORD(_buf, _field)                                       \
 209         ((_buf) + (_MCDI_CHECK_ALIGN(MC_CMD_ ## _field ## _OFST, 4) >> 2))
 210
 211 #define MCDI_BYTE(_buf, _field)                                         \
 212         ((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 1),       \
 213          *MCDI_PTR(_buf, _field))
 214 #define MCDI_WORD(_buf, _field)                                         \
 215         ((u16)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2) +       \
 216          le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field)))
 217 #define MCDI_SET_DWORD(_buf, _field, _value)                            \
 218         EFX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field), EFX_DWORD_0, _value)
 219 #define MCDI_DWORD(_buf, _field)                                        \
 220         EFX_DWORD_FIELD(*_MCDI_DWORD(_buf, _field), EFX_DWORD_0)
 221 #define MCDI_POPULATE_DWORD_1(_buf, _field, _name1, _value1)            \
 222         EFX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field),                \
 223                              MC_CMD_ ## _name1, _value1)
 224 #define MCDI_POPULATE_DWORD_2(_buf, _field, _name1, _value1,            \
 225                               _name2, _value2)                          \
 226         EFX_POPULATE_DWORD_2(*_MCDI_DWORD(_buf, _field),                \
 227                              MC_CMD_ ## _name1, _value1,                \
 228                              MC_CMD_ ## _name2, _value2)
 229 #define MCDI_POPULATE_DWORD_3(_buf, _field, _name1, _value1,            \
 230                               _name2, _value2, _name3, _value3)         \
 231         EFX_POPULATE_DWORD_3(*_MCDI_DWORD(_buf, _field),                \
 232                              MC_CMD_ ## _name1, _value1,                \
 233                              MC_CMD_ ## _name2, _value2,                \
 234                              MC_CMD_ ## _name3, _value3)
 235 #define MCDI_POPULATE_DWORD_4(_buf, _field, _name1, _value1,            \
 236                               _name2, _value2, _name3, _value3,         \
 237                               _name4, _value4)                          \
 238         EFX_POPULATE_DWORD_4(*_MCDI_DWORD(_buf, _field),                \
 239                              MC_CMD_ ## _name1, _value1,                \
 240                              MC_CMD_ ## _name2, _value2,                \
 241                              MC_CMD_ ## _name3, _value3,                \
 242                              MC_CMD_ ## _name4, _value4)
 243 #define MCDI_POPULATE_DWORD_5(_buf, _field, _name1, _value1,            \
 244                               _name2, _value2, _name3, _value3,         \
 245                               _name4, _value4, _name5, _value5)         \
 246         EFX_POPULATE_DWORD_5(*_MCDI_DWORD(_buf, _field),                \
 247                              MC_CMD_ ## _name1, _value1,                \
 248                              MC_CMD_ ## _name2, _value2,                \
 249                              MC_CMD_ ## _name3, _value3,                \
 250                              MC_CMD_ ## _name4, _value4,                \
 251                              MC_CMD_ ## _name5, _value5)
 252 #define MCDI_POPULATE_DWORD_6(_buf, _field, _name1, _value1,            \
 253                               _name2, _value2, _name3, _value3,         \
 254                               _name4, _value4, _name5, _value5,         \
 255                               _name6, _value6)                          \
 256         EFX_POPULATE_DWORD_6(*_MCDI_DWORD(_buf, _field),                \
 257                              MC_CMD_ ## _name1, _value1,                \
 258                              MC_CMD_ ## _name2, _value2,                \
 259                              MC_CMD_ ## _name3, _value3,                \
 260                              MC_CMD_ ## _name4, _value4,                \
 261                              MC_CMD_ ## _name5, _value5,                \
 262                              MC_CMD_ ## _name6, _value6)
 263 #define MCDI_POPULATE_DWORD_7(_buf, _field, _name1, _value1,            \
 264                               _name2, _value2, _name3, _value3,         \
 265                               _name4, _value4, _name5, _value5,         \
 266                               _name6, _value6, _name7, _value7)         \
 267         EFX_POPULATE_DWORD_7(*_MCDI_DWORD(_buf, _field),                \
 268                              MC_CMD_ ## _name1, _value1,                \
 269                              MC_CMD_ ## _name2, _value2,                \
 270                              MC_CMD_ ## _name3, _value3,                \
 271                              MC_CMD_ ## _name4, _value4,                \
 272                              MC_CMD_ ## _name5, _value5,                \
 273                              MC_CMD_ ## _name6, _value6,                \
 274                              MC_CMD_ ## _name7, _value7)
 275 #define MCDI_SET_QWORD(_buf, _field, _value)                            \
 276         do {                                                            \
 277                 EFX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[0],      \
 278                                      EFX_DWORD_0, (u32)(_value));       \
 279                 EFX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[1],      \
 280                                      EFX_DWORD_0, (u64)(_value) >> 32); \
 281         } while (0)
 282 #define MCDI_QWORD(_buf, _field)                                        \
 283         (EFX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[0], EFX_DWORD_0) |   \
 284         (u64)EFX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[1], EFX_DWORD_0) << 32)
 285 #define MCDI_FIELD(_ptr, _type, _field)                                 \
 286         EFX_EXTRACT_DWORD(                                              \
 287                 *(efx_dword_t *)                                        \
 288                 _MCDI_PTR(_ptr, MC_CMD_ ## _type ## _ ## _field ## _OFST & ~3),\
 289                 MC_CMD_ ## _type ## _ ## _field ## _LBN & 0x1f, \
 290                 (MC_CMD_ ## _type ## _ ## _field ## _LBN & 0x1f) +      \
 291                 MC_CMD_ ## _type ## _ ## _field ## _WIDTH - 1)
 292
 293 #define _MCDI_ARRAY_PTR(_buf, _field, _index, _align)                   \
 294         (_MCDI_PTR(_buf, _MCDI_CHECK_ALIGN(MC_CMD_ ## _field ## _OFST, _align))\
 295          + (_index) * _MCDI_CHECK_ALIGN(MC_CMD_ ## _field ## _LEN, _align))
 296 #define MCDI_DECLARE_STRUCT_PTR(_name)                                  \
 297         efx_dword_t *_name
 298 #define MCDI_ARRAY_STRUCT_PTR(_buf, _field, _index)                     \
 299         ((efx_dword_t *)_MCDI_ARRAY_PTR(_buf, _field, _index, 4))
 300 #define MCDI_VAR_ARRAY_LEN(_len, _field)                                \
 301         min_t(size_t, MC_CMD_ ## _field ## _MAXNUM,                     \
 302               ((_len) - MC_CMD_ ## _field ## _OFST) / MC_CMD_ ## _field ## _LEN)
 303 #define MCDI_ARRAY_WORD(_buf, _field, _index)                           \
 304         (BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2) +            \
 305          le16_to_cpu(*(__force const __le16 *)                          \
 306                      _MCDI_ARRAY_PTR(_buf, _field, _index, 2)))
 307 #define _MCDI_ARRAY_DWORD(_buf, _field, _index)                         \
 308         (BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 4) +            \
 309          (efx_dword_t *)_MCDI_ARRAY_PTR(_buf, _field, _index, 4))
 310 #define MCDI_SET_ARRAY_DWORD(_buf, _field, _index, _value)              \
 311         EFX_SET_DWORD_FIELD(*_MCDI_ARRAY_DWORD(_buf, _field, _index),   \
 312                             EFX_DWORD_0, _value)
 313 #define MCDI_ARRAY_DWORD(_buf, _field, _index)                          \
 314         EFX_DWORD_FIELD(*_MCDI_ARRAY_DWORD(_buf, _field, _index), EFX_DWORD_0)
 315 #define _MCDI_ARRAY_QWORD(_buf, _field, _index)                         \
 316         (BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 8) +            \
 317          (efx_dword_t *)_MCDI_ARRAY_PTR(_buf, _field, _index, 4))
 318 #define MCDI_SET_ARRAY_QWORD(_buf, _field, _index, _value)              \
 319         do {                                                            \
 320                 EFX_SET_DWORD_FIELD(_MCDI_ARRAY_QWORD(_buf, _field, _index)[0],\
 321                                     EFX_DWORD_0, (u32)(_value));        \
 322                 EFX_SET_DWORD_FIELD(_MCDI_ARRAY_QWORD(_buf, _field, _index)[1],\
 323                                     EFX_DWORD_0, (u64)(_value) >> 32);  \
 324         } while (0)
 325 #define MCDI_ARRAY_FIELD(_buf, _field1, _type, _index, _field2)         \
 326         MCDI_FIELD(MCDI_ARRAY_STRUCT_PTR(_buf, _field1, _index),        \
 327                    _type ## _TYPEDEF, _field2)
 328
 329 #define MCDI_EVENT_FIELD(_ev, _field)                   \
 330         EFX_QWORD_FIELD(_ev, MCDI_EVENT_ ## _field)
 331
 332 void efx_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len);
 333 int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
 334                            u16 *fw_subtype_list, u32 *capabilities);
 335 int efx_mcdi_log_ctrl(struct efx_nic *efx, bool evq, bool uart, u32 dest_evq);
 336 int efx_mcdi_nvram_types(struct efx_nic *efx, u32 *nvram_types_out);
 337 int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
 338                         size_t *size_out, size_t *erase_size_out,
 339                         bool *protected_out);
 340 int efx_mcdi_nvram_test_all(struct efx_nic *efx);
 341 int efx_mcdi_handle_assertion(struct efx_nic *efx);
 342 void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
 343 int efx_mcdi_wol_filter_set_magic(struct efx_nic *efx, const u8 *mac,
 344                                   int *id_out);
 345 int efx_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out);
 346 int efx_mcdi_wol_filter_remove(struct efx_nic *efx, int id);
 347 int efx_mcdi_wol_filter_reset(struct efx_nic *efx);
 348 int efx_mcdi_flush_rxqs(struct efx_nic *efx);
 349 int efx_mcdi_port_probe(struct efx_nic *efx);
 350 void efx_mcdi_port_remove(struct efx_nic *efx);
 351 int efx_mcdi_port_reconfigure(struct efx_nic *efx);
 352 int efx_mcdi_port_get_number(struct efx_nic *efx);
 353 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx);
 354 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev);
 355 int efx_mcdi_set_mac(struct efx_nic *efx);
 356 #define EFX_MC_STATS_GENERATION_INVALID ((__force __le64)(-1))
 357 void efx_mcdi_mac_start_stats(struct efx_nic *efx);
 358 void efx_mcdi_mac_stop_stats(struct efx_nic *efx);
 359 void efx_mcdi_mac_pull_stats(struct efx_nic *efx);
 360 bool efx_mcdi_mac_check_fault(struct efx_nic *efx);
 361 enum reset_type efx_mcdi_map_reset_reason(enum reset_type reason);
 362 int efx_mcdi_reset(struct efx_nic *efx, enum reset_type method);
 363 int efx_mcdi_set_workaround(struct efx_nic *efx, u32 type, bool enabled,
 364                             unsigned int *flags);
 365 int efx_mcdi_get_workarounds(struct efx_nic *efx, unsigned int *impl_out,
 366                              unsigned int *enabled_out);
 367
 368 #ifdef CONFIG_SFC_MCDI_MON
 369 int efx_mcdi_mon_probe(struct efx_nic *efx);
 370 void efx_mcdi_mon_remove(struct efx_nic *efx);
 371 #else
 372 static inline int efx_mcdi_mon_probe(struct efx_nic *efx) { return 0; }
 373 static inline void efx_mcdi_mon_remove(struct efx_nic *efx) {}
 374 #endif
 375
 376 #ifdef CONFIG_SFC_MTD
 377 int efx_mcdi_mtd_read(struct mtd_info *mtd, loff_t start, size_t len,
 378                       size_t *retlen, u8 *buffer);
 379 int efx_mcdi_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len);
 380 int efx_mcdi_mtd_write(struct mtd_info *mtd, loff_t start, size_t len,
 381                        size_t *retlen, const u8 *buffer);
 382 int efx_mcdi_mtd_sync(struct mtd_info *mtd);
 383 void efx_mcdi_mtd_rename(struct efx_mtd_partition *part);
 384 #endif
 385
 386 #endif /* EFX_MCDI_H */