drivers/net/wireless/iwlwifi/iwl-trans.h

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  63 #ifndef __iwl_trans_h__
  64 #define __iwl_trans_h__
  65
  66 #include <linux/ieee80211.h>
  67 #include <linux/mm.h> /* for page_address */
  68 #include <linux/lockdep.h>
  69
  70 #include "iwl-debug.h"
  71 #include "iwl-config.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-op-mode.h"
  74
  75 /**
  76  * DOC: Transport layer - what is it ?
  77  *
  78  * The tranport layer is the layer that deals with the HW directly. It provides
  79  * an abstraction of the underlying HW to the upper layer. The transport layer
  80  * doesn't provide any policy, algorithm or anything of this kind, but only
  81  * mechanisms to make the HW do something.It is not completely stateless but
  82  * close to it.
  83  * We will have an implementation for each different supported bus.
  84  */
  85
  86 /**
  87  * DOC: Life cycle of the transport layer
  88  *
  89  * The transport layer has a very precise life cycle.
  90  *
  91  *      1) A helper function is called during the module initialization and
  92  *         registers the bus driver's ops with the transport's alloc function.
  93  *      2) Bus's probe calls to the transport layer's allocation functions.
  94  *         Of course this function is bus specific.
  95  *      3) This allocation functions will spawn the upper layer which will
  96  *         register mac80211.
  97  *
  98  *      4) At some point (i.e. mac80211's start call), the op_mode will call
  99  *         the following sequence:
 100  *         start_hw
 101  *         start_fw
 102  *
 103  *      5) Then when finished (or reset):
 104  *         stop_device
 105  *
 106  *      6) Eventually, the free function will be called.
 107  */
 108
 109 /**
 110  * DOC: Host command section
 111  *
 112  * A host command is a commaned issued by the upper layer to the fw. There are
 113  * several versions of fw that have several APIs. The transport layer is
 114  * completely agnostic to these differences.
 115  * The transport does provide helper functionnality (i.e. SYNC / ASYNC mode),
 116  */
 117 #define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f)
 118 #define QUEUE_TO_SEQ(q) (((q) & 0x1f) << 8)
 119 #define SEQ_TO_INDEX(s) ((s) & 0xff)
 120 #define INDEX_TO_SEQ(i) ((i) & 0xff)
 121 #define SEQ_RX_FRAME    cpu_to_le16(0x8000)
 122
 123 /**
 124  * struct iwl_cmd_header
 125  *
 126  * This header format appears in the beginning of each command sent from the
 127  * driver, and each response/notification received from uCode.
 128  */
 129 struct iwl_cmd_header {
 130         u8 cmd;         /* Command ID:  REPLY_RXON, etc. */
 131         u8 flags;       /* 0:5 reserved, 6 abort, 7 internal */
 132         /*
 133          * The driver sets up the sequence number to values of its choosing.
 134          * uCode does not use this value, but passes it back to the driver
 135          * when sending the response to each driver-originated command, so
 136          * the driver can match the response to the command.  Since the values
 137          * don't get used by uCode, the driver may set up an arbitrary format.
 138          *
 139          * There is one exception:  uCode sets bit 15 when it originates
 140          * the response/notification, i.e. when the response/notification
 141          * is not a direct response to a command sent by the driver.  For
 142          * example, uCode issues REPLY_RX when it sends a received frame
 143          * to the driver; it is not a direct response to any driver command.
 144          *
 145          * The Linux driver uses the following format:
 146          *
 147          *  0:7         tfd index - position within TX queue
 148          *  8:12        TX queue id
 149          *  13:14       reserved
 150          *  15          unsolicited RX or uCode-originated notification
 151          */
 152         __le16 sequence;
 153 } __packed;
 154
 155 /* iwl_cmd_header flags value */
 156 #define IWL_CMD_FAILED_MSK 0x40
 157
 158
 159 #define FH_RSCSR_FRAME_SIZE_MSK         0x00003FFF      /* bits 0-13 */
 160 #define FH_RSCSR_FRAME_INVALID          0x55550000
 161 #define FH_RSCSR_FRAME_ALIGN            0x40
 162
 163 struct iwl_rx_packet {
 164         /*
 165          * The first 4 bytes of the RX frame header contain both the RX frame
 166          * size and some flags.
 167          * Bit fields:
 168          * 31:    flag flush RB request
 169          * 30:    flag ignore TC (terminal counter) request
 170          * 29:    flag fast IRQ request
 171          * 28-14: Reserved
 172          * 13-00: RX frame size
 173          */
 174         __le32 len_n_flags;
 175         struct iwl_cmd_header hdr;
 176         u8 data[];
 177 } __packed;
 178
 179 static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt)
 180 {
 181         return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 182 }
 183
 184 static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt)
 185 {
 186         return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr);
 187 }
 188
 189 /**
 190  * enum CMD_MODE - how to send the host commands ?
 191  *
 192  * @CMD_ASYNC: Return right away and don't wait for the response
 193  * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of
 194  *      the response. The caller needs to call iwl_free_resp when done.
 195  * @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the
 196  *      command queue, but after other high priority commands. valid only
 197  *      with CMD_ASYNC.
 198  * @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle.
 199  * @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle.
 200  * @CMD_WAKE_UP_TRANS: The command response should wake up the trans
 201  *      (i.e. mark it as non-idle).
 202  */
 203 enum CMD_MODE {
 204         CMD_ASYNC               = BIT(0),
 205         CMD_WANT_SKB            = BIT(1),
 206         CMD_SEND_IN_RFKILL      = BIT(2),
 207         CMD_HIGH_PRIO           = BIT(3),
 208         CMD_SEND_IN_IDLE        = BIT(4),
 209         CMD_MAKE_TRANS_IDLE     = BIT(5),
 210         CMD_WAKE_UP_TRANS       = BIT(6),
 211 };
 212
 213 #define DEF_CMD_PAYLOAD_SIZE 320
 214
 215 /**
 216  * struct iwl_device_cmd
 217  *
 218  * For allocation of the command and tx queues, this establishes the overall
 219  * size of the largest command we send to uCode, except for commands that
 220  * aren't fully copied and use other TFD space.
 221  */
 222 struct iwl_device_cmd {
 223         struct iwl_cmd_header hdr;      /* uCode API */
 224         u8 payload[DEF_CMD_PAYLOAD_SIZE];
 225 } __packed;
 226
 227 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
 228
 229 /*
 230  * number of transfer buffers (fragments) per transmit frame descriptor;
 231  * this is just the driver's idea, the hardware supports 20
 232  */
 233 #define IWL_MAX_CMD_TBS_PER_TFD 2
 234
 235 /**
 236  * struct iwl_hcmd_dataflag - flag for each one of the chunks of the command
 237  *
 238  * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
 239  *      ring. The transport layer doesn't map the command's buffer to DMA, but
 240  *      rather copies it to a previously allocated DMA buffer. This flag tells
 241  *      the transport layer not to copy the command, but to map the existing
 242  *      buffer (that is passed in) instead. This saves the memcpy and allows
 243  *      commands that are bigger than the fixed buffer to be submitted.
 244  *      Note that a TFD entry after a NOCOPY one cannot be a normal copied one.
 245  * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
 246  *      chunk internally and free it again after the command completes. This
 247  *      can (currently) be used only once per command.
 248  *      Note that a TFD entry after a DUP one cannot be a normal copied one.
 249  */
 250 enum iwl_hcmd_dataflag {
 251         IWL_HCMD_DFL_NOCOPY     = BIT(0),
 252         IWL_HCMD_DFL_DUP        = BIT(1),
 253 };
 254
 255 /**
 256  * struct iwl_host_cmd - Host command to the uCode
 257  *
 258  * @data: array of chunks that composes the data of the host command
 259  * @resp_pkt: response packet, if %CMD_WANT_SKB was set
 260  * @_rx_page_order: (internally used to free response packet)
 261  * @_rx_page_addr: (internally used to free response packet)
 262  * @handler_status: return value of the handler of the command
 263  *      (put in setup_rx_handlers) - valid for SYNC mode only
 264  * @flags: can be CMD_*
 265  * @len: array of the lengths of the chunks in data
 266  * @dataflags: IWL_HCMD_DFL_*
 267  * @id: id of the host command
 268  */
 269 struct iwl_host_cmd {
 270         const void *data[IWL_MAX_CMD_TBS_PER_TFD];
 271         struct iwl_rx_packet *resp_pkt;
 272         unsigned long _rx_page_addr;
 273         u32 _rx_page_order;
 274         int handler_status;
 275
 276         u32 flags;
 277         u16 len[IWL_MAX_CMD_TBS_PER_TFD];
 278         u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD];
 279         u8 id;
 280 };
 281
 282 static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
 283 {
 284         free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
 285 }
 286
 287 struct iwl_rx_cmd_buffer {
 288         struct page *_page;
 289         int _offset;
 290         bool _page_stolen;
 291         u32 _rx_page_order;
 292         unsigned int truesize;
 293 };
 294
 295 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
 296 {
 297         return (void *)((unsigned long)page_address(r->_page) + r->_offset);
 298 }
 299
 300 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
 301 {
 302         return r->_offset;
 303 }
 304
 305 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
 306 {
 307         r->_page_stolen = true;
 308         get_page(r->_page);
 309         return r->_page;
 310 }
 311
 312 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
 313 {
 314         __free_pages(r->_page, r->_rx_page_order);
 315 }
 316
 317 #define MAX_NO_RECLAIM_CMDS     6
 318
 319 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
 320
 321 /*
 322  * Maximum number of HW queues the transport layer
 323  * currently supports
 324  */
 325 #define IWL_MAX_HW_QUEUES               32
 326 #define IWL_MAX_TID_COUNT       8
 327 #define IWL_FRAME_LIMIT 64
 328
 329 /**
 330  * enum iwl_wowlan_status - WoWLAN image/device status
 331  * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
 332  * @IWL_D3_STATUS_RESET: device was reset while suspended
 333  */
 334 enum iwl_d3_status {
 335         IWL_D3_STATUS_ALIVE,
 336         IWL_D3_STATUS_RESET,
 337 };
 338
 339 /**
 340  * enum iwl_trans_status: transport status flags
 341  * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed
 342  * @STATUS_DEVICE_ENABLED: APM is enabled
 343  * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up)
 344  * @STATUS_INT_ENABLED: interrupts are enabled
 345  * @STATUS_RFKILL: the HW RFkill switch is in KILL position
 346  * @STATUS_FW_ERROR: the fw is in error state
 347  * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands
 348  *      are sent
 349  * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent
 350  */
 351 enum iwl_trans_status {
 352         STATUS_SYNC_HCMD_ACTIVE,
 353         STATUS_DEVICE_ENABLED,
 354         STATUS_TPOWER_PMI,
 355         STATUS_INT_ENABLED,
 356         STATUS_RFKILL,
 357         STATUS_FW_ERROR,
 358         STATUS_TRANS_GOING_IDLE,
 359         STATUS_TRANS_IDLE,
 360 };
 361
 362 /**
 363  * struct iwl_trans_config - transport configuration
 364  *
 365  * @op_mode: pointer to the upper layer.
 366  * @cmd_queue: the index of the command queue.
 367  *      Must be set before start_fw.
 368  * @cmd_fifo: the fifo for host commands
 369  * @no_reclaim_cmds: Some devices erroneously don't set the
 370  *      SEQ_RX_FRAME bit on some notifications, this is the
 371  *      list of such notifications to filter. Max length is
 372  *      %MAX_NO_RECLAIM_CMDS.
 373  * @n_no_reclaim_cmds: # of commands in list
 374  * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs,
 375  *      if unset 4k will be the RX buffer size
 376  * @bc_table_dword: set to true if the BC table expects the byte count to be
 377  *      in DWORD (as opposed to bytes)
 378  * @queue_watchdog_timeout: time (in ms) after which queues
 379  *      are considered stuck and will trigger device restart
 380  * @command_names: array of command names, must be 256 entries
 381  *      (one for each command); for debugging only
 382  */
 383 struct iwl_trans_config {
 384         struct iwl_op_mode *op_mode;
 385
 386         u8 cmd_queue;
 387         u8 cmd_fifo;
 388         const u8 *no_reclaim_cmds;
 389         unsigned int n_no_reclaim_cmds;
 390
 391         bool rx_buf_size_8k;
 392         bool bc_table_dword;
 393         unsigned int queue_watchdog_timeout;
 394         const char *const *command_names;
 395 };
 396
 397 struct iwl_trans_dump_data {
 398         u32 len;
 399         u8 data[];
 400 };
 401
 402 struct iwl_trans;
 403
 404 /**
 405  * struct iwl_trans_ops - transport specific operations
 406  *
 407  * All the handlers MUST be implemented
 408  *
 409  * @start_hw: starts the HW- from that point on, the HW can send interrupts
 410  *      May sleep
 411  * @op_mode_leave: Turn off the HW RF kill indication if on
 412  *      May sleep
 413  * @start_fw: allocates and inits all the resources for the transport
 414  *      layer. Also kick a fw image.
 415  *      May sleep
 416  * @fw_alive: called when the fw sends alive notification. If the fw provides
 417  *      the SCD base address in SRAM, then provide it here, or 0 otherwise.
 418  *      May sleep
 419  * @stop_device: stops the whole device (embedded CPU put to reset) and stops
 420  *      the HW. From that point on, the HW will be in low power but will still
 421  *      issue interrupt if the HW RF kill is triggered. This callback must do
 422  *      the right thing and not crash even if start_hw() was called but not
 423  *      start_fw(). May sleep
 424  * @d3_suspend: put the device into the correct mode for WoWLAN during
 425  *      suspend. This is optional, if not implemented WoWLAN will not be
 426  *      supported. This callback may sleep.
 427  * @d3_resume: resume the device after WoWLAN, enabling the opmode to
 428  *      talk to the WoWLAN image to get its status. This is optional, if not
 429  *      implemented WoWLAN will not be supported. This callback may sleep.
 430  * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
 431  *      If RFkill is asserted in the middle of a SYNC host command, it must
 432  *      return -ERFKILL straight away.
 433  *      May sleep only if CMD_ASYNC is not set
 434  * @tx: send an skb
 435  *      Must be atomic
 436  * @reclaim: free packet until ssn. Returns a list of freed packets.
 437  *      Must be atomic
 438  * @txq_enable: setup a queue. To setup an AC queue, use the
 439  *      iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
 440  *      this one. The op_mode must not configure the HCMD queue. May sleep.
 441  * @txq_disable: de-configure a Tx queue to send AMPDUs
 442  *      Must be atomic
 443  * @wait_tx_queue_empty: wait until tx queues are empty. May sleep.
 444  * @dbgfs_register: add the dbgfs files under this directory. Files will be
 445  *      automatically deleted.
 446  * @write8: write a u8 to a register at offset ofs from the BAR
 447  * @write32: write a u32 to a register at offset ofs from the BAR
 448  * @read32: read a u32 register at offset ofs from the BAR
 449  * @read_prph: read a DWORD from a periphery register
 450  * @write_prph: write a DWORD to a periphery register
 451  * @read_mem: read device's SRAM in DWORD
 452  * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
 453  *      will be zeroed.
 454  * @configure: configure parameters required by the transport layer from
 455  *      the op_mode. May be called several times before start_fw, can't be
 456  *      called after that.
 457  * @set_pmi: set the power pmi state
 458  * @grab_nic_access: wake the NIC to be able to access non-HBUS regs.
 459  *      Sleeping is not allowed between grab_nic_access and
 460  *      release_nic_access.
 461  * @release_nic_access: let the NIC go to sleep. The "flags" parameter
 462  *      must be the same one that was sent before to the grab_nic_access.
 463  * @set_bits_mask - set SRAM register according to value and mask.
 464  * @ref: grab a reference to the transport/FW layers, disallowing
 465  *      certain low power states
 466  * @unref: release a reference previously taken with @ref. Note that
 467  *      initially the reference count is 1, making an initial @unref
 468  *      necessary to allow low power states.
 469  * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last
 470  *      TX'ed commands and similar. The buffer will be vfree'd by the caller.
 471  *      Note that the transport must fill in the proper file headers.
 472  */
 473 struct iwl_trans_ops {
 474
 475         int (*start_hw)(struct iwl_trans *iwl_trans);
 476         void (*op_mode_leave)(struct iwl_trans *iwl_trans);
 477         int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
 478                         bool run_in_rfkill);
 479         int (*update_sf)(struct iwl_trans *trans,
 480                          struct iwl_sf_region *st_fwrd_space);
 481         void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
 482         void (*stop_device)(struct iwl_trans *trans);
 483
 484         void (*d3_suspend)(struct iwl_trans *trans, bool test);
 485         int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status,
 486                          bool test);
 487
 488         int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
 489
 490         int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
 491                   struct iwl_device_cmd *dev_cmd, int queue);
 492         void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
 493                         struct sk_buff_head *skbs);
 494
 495         void (*txq_enable)(struct iwl_trans *trans, int queue, int fifo,
 496                            int sta_id, int tid, int frame_limit, u16 ssn);
 497         void (*txq_disable)(struct iwl_trans *trans, int queue);
 498
 499         int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
 500         int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm);
 501
 502         void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
 503         void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
 504         u32 (*read32)(struct iwl_trans *trans, u32 ofs);
 505         u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
 506         void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
 507         int (*read_mem)(struct iwl_trans *trans, u32 addr,
 508                         void *buf, int dwords);
 509         int (*write_mem)(struct iwl_trans *trans, u32 addr,
 510                          const void *buf, int dwords);
 511         void (*configure)(struct iwl_trans *trans,
 512                           const struct iwl_trans_config *trans_cfg);
 513         void (*set_pmi)(struct iwl_trans *trans, bool state);
 514         bool (*grab_nic_access)(struct iwl_trans *trans, bool silent,
 515                                 unsigned long *flags);
 516         void (*release_nic_access)(struct iwl_trans *trans,
 517                                    unsigned long *flags);
 518         void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
 519                               u32 value);
 520         void (*ref)(struct iwl_trans *trans);
 521         void (*unref)(struct iwl_trans *trans);
 522
 523 #ifdef CONFIG_IWLWIFI_DEBUGFS
 524         struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans);
 525 #endif
 526 };
 527
 528 /**
 529  * enum iwl_trans_state - state of the transport layer
 530  *
 531  * @IWL_TRANS_NO_FW: no fw has sent an alive response
 532  * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
 533  */
 534 enum iwl_trans_state {
 535         IWL_TRANS_NO_FW = 0,
 536         IWL_TRANS_FW_ALIVE      = 1,
 537 };
 538
 539 /**
 540  * struct iwl_trans - transport common data
 541  *
 542  * @ops - pointer to iwl_trans_ops
 543  * @op_mode - pointer to the op_mode
 544  * @cfg - pointer to the configuration
 545  * @status: a bit-mask of transport status flags
 546  * @dev - pointer to struct device * that represents the device
 547  * @hw_id: a u32 with the ID of the device / subdevice.
 548  *      Set during transport allocation.
 549  * @hw_id_str: a string with info about HW ID. Set during transport allocation.
 550  * @pm_support: set to true in start_hw if link pm is supported
 551  * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
 552  *      The user should use iwl_trans_{alloc,free}_tx_cmd.
 553  * @dev_cmd_headroom: room needed for the transport's private use before the
 554  *      device_cmd for Tx - for internal use only
 555  *      The user should use iwl_trans_{alloc,free}_tx_cmd.
 556  * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
 557  *      starting the firmware, used for tracing
 558  * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
 559  *      start of the 802.11 header in the @rx_mpdu_cmd
 560  * @dflt_pwr_limit: default power limit fetched from the platform (ACPI)
 561  */
 562 struct iwl_trans {
 563         const struct iwl_trans_ops *ops;
 564         struct iwl_op_mode *op_mode;
 565         const struct iwl_cfg *cfg;
 566         enum iwl_trans_state state;
 567         unsigned long status;
 568
 569         struct device *dev;
 570         u32 hw_rev;
 571         u32 hw_id;
 572         char hw_id_str[52];
 573
 574         u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
 575
 576         bool pm_support;
 577
 578         /* The following fields are internal only */
 579         struct kmem_cache *dev_cmd_pool;
 580         size_t dev_cmd_headroom;
 581         char dev_cmd_pool_name[50];
 582
 583         struct dentry *dbgfs_dir;
 584
 585 #ifdef CONFIG_LOCKDEP
 586         struct lockdep_map sync_cmd_lockdep_map;
 587 #endif
 588
 589         u64 dflt_pwr_limit;
 590
 591         /* pointer to trans specific struct */
 592         /*Ensure that this pointer will always be aligned to sizeof pointer */
 593         char trans_specific[0] __aligned(sizeof(void *));
 594 };
 595
 596 static inline void iwl_trans_configure(struct iwl_trans *trans,
 597                                        const struct iwl_trans_config *trans_cfg)
 598 {
 599         trans->op_mode = trans_cfg->op_mode;
 600
 601         trans->ops->configure(trans, trans_cfg);
 602 }
 603
 604 static inline int iwl_trans_start_hw(struct iwl_trans *trans)
 605 {
 606         might_sleep();
 607
 608         return trans->ops->start_hw(trans);
 609 }
 610
 611 static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans)
 612 {
 613         might_sleep();
 614
 615         if (trans->ops->op_mode_leave)
 616                 trans->ops->op_mode_leave(trans);
 617
 618         trans->op_mode = NULL;
 619
 620         trans->state = IWL_TRANS_NO_FW;
 621 }
 622
 623 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
 624 {
 625         might_sleep();
 626
 627         trans->state = IWL_TRANS_FW_ALIVE;
 628
 629         trans->ops->fw_alive(trans, scd_addr);
 630 }
 631
 632 static inline int iwl_trans_start_fw(struct iwl_trans *trans,
 633                                      const struct fw_img *fw,
 634                                      bool run_in_rfkill)
 635 {
 636         might_sleep();
 637
 638         WARN_ON_ONCE(!trans->rx_mpdu_cmd);
 639
 640         clear_bit(STATUS_FW_ERROR, &trans->status);
 641         return trans->ops->start_fw(trans, fw, run_in_rfkill);
 642 }
 643
 644 static inline int iwl_trans_update_sf(struct iwl_trans *trans,
 645                                       struct iwl_sf_region *st_fwrd_space)
 646 {
 647         might_sleep();
 648
 649         if (trans->ops->update_sf)
 650                 return trans->ops->update_sf(trans, st_fwrd_space);
 651
 652         return 0;
 653 }
 654
 655 static inline void iwl_trans_stop_device(struct iwl_trans *trans)
 656 {
 657         might_sleep();
 658
 659         trans->ops->stop_device(trans);
 660
 661         trans->state = IWL_TRANS_NO_FW;
 662 }
 663
 664 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test)
 665 {
 666         might_sleep();
 667         trans->ops->d3_suspend(trans, test);
 668 }
 669
 670 static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
 671                                       enum iwl_d3_status *status,
 672                                       bool test)
 673 {
 674         might_sleep();
 675         return trans->ops->d3_resume(trans, status, test);
 676 }
 677
 678 static inline void iwl_trans_ref(struct iwl_trans *trans)
 679 {
 680         if (trans->ops->ref)
 681                 trans->ops->ref(trans);
 682 }
 683
 684 static inline void iwl_trans_unref(struct iwl_trans *trans)
 685 {
 686         if (trans->ops->unref)
 687                 trans->ops->unref(trans);
 688 }
 689
 690 #ifdef CONFIG_IWLWIFI_DEBUGFS
 691 static inline struct iwl_trans_dump_data *
 692 iwl_trans_dump_data(struct iwl_trans *trans)
 693 {
 694         if (!trans->ops->dump_data)
 695                 return NULL;
 696         return trans->ops->dump_data(trans);
 697 }
 698 #endif
 699
 700 static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
 701                                      struct iwl_host_cmd *cmd)
 702 {
 703         int ret;
 704
 705         if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
 706                      test_bit(STATUS_RFKILL, &trans->status)))
 707                 return -ERFKILL;
 708
 709         if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
 710                 return -EIO;
 711
 712         if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
 713                 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
 714                 return -EIO;
 715         }
 716
 717         if (!(cmd->flags & CMD_ASYNC))
 718                 lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
 719
 720         ret = trans->ops->send_cmd(trans, cmd);
 721
 722         if (!(cmd->flags & CMD_ASYNC))
 723                 lock_map_release(&trans->sync_cmd_lockdep_map);
 724
 725         return ret;
 726 }
 727
 728 static inline struct iwl_device_cmd *
 729 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
 730 {
 731         u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);
 732
 733         if (unlikely(dev_cmd_ptr == NULL))
 734                 return NULL;
 735
 736         return (struct iwl_device_cmd *)
 737                         (dev_cmd_ptr + trans->dev_cmd_headroom);
 738 }
 739
 740 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
 741                                          struct iwl_device_cmd *dev_cmd)
 742 {
 743         u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom;
 744
 745         kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr);
 746 }
 747
 748 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
 749                                struct iwl_device_cmd *dev_cmd, int queue)
 750 {
 751         if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
 752                 return -EIO;
 753
 754         if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
 755                 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
 756
 757         return trans->ops->tx(trans, skb, dev_cmd, queue);
 758 }
 759
 760 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
 761                                      int ssn, struct sk_buff_head *skbs)
 762 {
 763         if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
 764                 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
 765
 766         trans->ops->reclaim(trans, queue, ssn, skbs);
 767 }
 768
 769 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
 770 {
 771         trans->ops->txq_disable(trans, queue);
 772 }
 773
 774 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
 775                                         int fifo, int sta_id, int tid,
 776                                         int frame_limit, u16 ssn)
 777 {
 778         might_sleep();
 779
 780         if (unlikely((trans->state != IWL_TRANS_FW_ALIVE)))
 781                 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
 782
 783         trans->ops->txq_enable(trans, queue, fifo, sta_id, tid,
 784                                  frame_limit, ssn);
 785 }
 786
 787 static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue,
 788                                            int fifo)
 789 {
 790         iwl_trans_txq_enable(trans, queue, fifo, -1,
 791                              IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0);
 792 }
 793
 794 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans,
 795                                                 u32 txq_bm)
 796 {
 797         if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
 798                 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
 799
 800         return trans->ops->wait_tx_queue_empty(trans, txq_bm);
 801 }
 802
 803 static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans,
 804                                            struct dentry *dir)
 805 {
 806         return trans->ops->dbgfs_register(trans, dir);
 807 }
 808
 809 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
 810 {
 811         trans->ops->write8(trans, ofs, val);
 812 }
 813
 814 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
 815 {
 816         trans->ops->write32(trans, ofs, val);
 817 }
 818
 819 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
 820 {
 821         return trans->ops->read32(trans, ofs);
 822 }
 823
 824 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
 825 {
 826         return trans->ops->read_prph(trans, ofs);
 827 }
 828
 829 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
 830                                         u32 val)
 831 {
 832         return trans->ops->write_prph(trans, ofs, val);
 833 }
 834
 835 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
 836                                      void *buf, int dwords)
 837 {
 838         return trans->ops->read_mem(trans, addr, buf, dwords);
 839 }
 840
 841 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize)                   \
 842         do {                                                                  \
 843                 if (__builtin_constant_p(bufsize))                            \
 844                         BUILD_BUG_ON((bufsize) % sizeof(u32));                \
 845                 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
 846         } while (0)
 847
 848 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
 849 {
 850         u32 value;
 851
 852         if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
 853                 return 0xa5a5a5a5;
 854
 855         return value;
 856 }
 857
 858 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
 859                                       const void *buf, int dwords)
 860 {
 861         return trans->ops->write_mem(trans, addr, buf, dwords);
 862 }
 863
 864 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
 865                                         u32 val)
 866 {
 867         return iwl_trans_write_mem(trans, addr, &val, 1);
 868 }
 869
 870 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
 871 {
 872         if (trans->ops->set_pmi)
 873                 trans->ops->set_pmi(trans, state);
 874 }
 875
 876 static inline void
 877 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
 878 {
 879         trans->ops->set_bits_mask(trans, reg, mask, value);
 880 }
 881
 882 #define iwl_trans_grab_nic_access(trans, silent, flags) \
 883         __cond_lock(nic_access,                         \
 884                     likely((trans)->ops->grab_nic_access(trans, silent, flags)))
 885
 886 static inline void __releases(nic_access)
 887 iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags)
 888 {
 889         trans->ops->release_nic_access(trans, flags);
 890         __release(nic_access);
 891 }
 892
 893 static inline void iwl_trans_fw_error(struct iwl_trans *trans)
 894 {
 895         if (WARN_ON_ONCE(!trans->op_mode))
 896                 return;
 897
 898         /* prevent double restarts due to the same erroneous FW */
 899         if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status))
 900                 iwl_op_mode_nic_error(trans->op_mode);
 901 }
 902
 903 /*****************************************************
 904 * driver (transport) register/unregister functions
 905 ******************************************************/
 906 int __must_check iwl_pci_register_driver(void);
 907 void iwl_pci_unregister_driver(void);
 908
 909 static inline void trans_lockdep_init(struct iwl_trans *trans)
 910 {
 911 #ifdef CONFIG_LOCKDEP
 912         static struct lock_class_key __key;
 913
 914         lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
 915                          &__key, 0);
 916 #endif
 917 }
 918
 919 #endif /* __iwl_trans_h__ */