1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #ifndef __iwl_trans_h__ 63 #define __iwl_trans_h__ 64 65 #include <linux/ieee80211.h> 66 #include <linux/mm.h> /* for page_address */ 67 #include <linux/lockdep.h> 68 #include <linux/kernel.h> 69 70 #include "iwl-debug.h" 71 #include "iwl-config.h" 72 #include "fw/img.h" 73 #include "iwl-op-mode.h" 74 #include "fw/api/cmdhdr.h" 75 #include "fw/api/txq.h" 76 #include "fw/api/dbg-tlv.h" 77 #include "iwl-dbg-tlv.h" 78 79 /** 80 * DOC: Transport layer - what is it ? 81 * 82 * The transport layer is the layer that deals with the HW directly. It provides 83 * an abstraction of the underlying HW to the upper layer. The transport layer 84 * doesn't provide any policy, algorithm or anything of this kind, but only 85 * mechanisms to make the HW do something. It is not completely stateless but 86 * close to it. 87 * We will have an implementation for each different supported bus. 88 */ 89 90 /** 91 * DOC: Life cycle of the transport layer 92 * 93 * The transport layer has a very precise life cycle. 94 * 95 * 1) A helper function is called during the module initialization and 96 * registers the bus driver's ops with the transport's alloc function. 97 * 2) Bus's probe calls to the transport layer's allocation functions. 98 * Of course this function is bus specific. 99 * 3) This allocation functions will spawn the upper layer which will 100 * register mac80211. 101 * 102 * 4) At some point (i.e. mac80211's start call), the op_mode will call 103 * the following sequence: 104 * start_hw 105 * start_fw 106 * 107 * 5) Then when finished (or reset): 108 * stop_device 109 * 110 * 6) Eventually, the free function will be called. 111 */ 112 113 #define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */ 114 #define FH_RSCSR_FRAME_INVALID 0x55550000 115 #define FH_RSCSR_FRAME_ALIGN 0x40 116 #define FH_RSCSR_RPA_EN BIT(25) 117 #define FH_RSCSR_RADA_EN BIT(26) 118 #define FH_RSCSR_RXQ_POS 16 119 #define FH_RSCSR_RXQ_MASK 0x3F0000 120 121 struct iwl_rx_packet { 122 /* 123 * The first 4 bytes of the RX frame header contain both the RX frame 124 * size and some flags. 125 * Bit fields: 126 * 31: flag flush RB request 127 * 30: flag ignore TC (terminal counter) request 128 * 29: flag fast IRQ request 129 * 28-27: Reserved 130 * 26: RADA enabled 131 * 25: Offload enabled 132 * 24: RPF enabled 133 * 23: RSS enabled 134 * 22: Checksum enabled 135 * 21-16: RX queue 136 * 15-14: Reserved 137 * 13-00: RX frame size 138 */ 139 __le32 len_n_flags; 140 struct iwl_cmd_header hdr; 141 u8 data[]; 142 } __packed; 143 144 static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt) 145 { 146 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; 147 } 148 149 static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt) 150 { 151 return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr); 152 } 153 154 /** 155 * enum CMD_MODE - how to send the host commands ? 156 * 157 * @CMD_ASYNC: Return right away and don't wait for the response 158 * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of 159 * the response. The caller needs to call iwl_free_resp when done. 160 * @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the 161 * command queue, but after other high priority commands. Valid only 162 * with CMD_ASYNC. 163 * @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle. 164 * @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle. 165 * @CMD_WAKE_UP_TRANS: The command response should wake up the trans 166 * (i.e. mark it as non-idle). 167 * @CMD_WANT_ASYNC_CALLBACK: the op_mode's async callback function must be 168 * called after this command completes. Valid only with CMD_ASYNC. 169 */ 170 enum CMD_MODE { 171 CMD_ASYNC = BIT(0), 172 CMD_WANT_SKB = BIT(1), 173 CMD_SEND_IN_RFKILL = BIT(2), 174 CMD_HIGH_PRIO = BIT(3), 175 CMD_SEND_IN_IDLE = BIT(4), 176 CMD_MAKE_TRANS_IDLE = BIT(5), 177 CMD_WAKE_UP_TRANS = BIT(6), 178 CMD_WANT_ASYNC_CALLBACK = BIT(7), 179 }; 180 181 #define DEF_CMD_PAYLOAD_SIZE 320 182 183 /** 184 * struct iwl_device_cmd 185 * 186 * For allocation of the command and tx queues, this establishes the overall 187 * size of the largest command we send to uCode, except for commands that 188 * aren't fully copied and use other TFD space. 189 */ 190 struct iwl_device_cmd { 191 union { 192 struct { 193 struct iwl_cmd_header hdr; /* uCode API */ 194 u8 payload[DEF_CMD_PAYLOAD_SIZE]; 195 }; 196 struct { 197 struct iwl_cmd_header_wide hdr_wide; 198 u8 payload_wide[DEF_CMD_PAYLOAD_SIZE - 199 sizeof(struct iwl_cmd_header_wide) + 200 sizeof(struct iwl_cmd_header)]; 201 }; 202 }; 203 } __packed; 204 205 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd)) 206 207 /* 208 * number of transfer buffers (fragments) per transmit frame descriptor; 209 * this is just the driver's idea, the hardware supports 20 210 */ 211 #define IWL_MAX_CMD_TBS_PER_TFD 2 212 213 /** 214 * enum iwl_hcmd_dataflag - flag for each one of the chunks of the command 215 * 216 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's 217 * ring. The transport layer doesn't map the command's buffer to DMA, but 218 * rather copies it to a previously allocated DMA buffer. This flag tells 219 * the transport layer not to copy the command, but to map the existing 220 * buffer (that is passed in) instead. This saves the memcpy and allows 221 * commands that are bigger than the fixed buffer to be submitted. 222 * Note that a TFD entry after a NOCOPY one cannot be a normal copied one. 223 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this 224 * chunk internally and free it again after the command completes. This 225 * can (currently) be used only once per command. 226 * Note that a TFD entry after a DUP one cannot be a normal copied one. 227 */ 228 enum iwl_hcmd_dataflag { 229 IWL_HCMD_DFL_NOCOPY = BIT(0), 230 IWL_HCMD_DFL_DUP = BIT(1), 231 }; 232 233 /** 234 * struct iwl_host_cmd - Host command to the uCode 235 * 236 * @data: array of chunks that composes the data of the host command 237 * @resp_pkt: response packet, if %CMD_WANT_SKB was set 238 * @_rx_page_order: (internally used to free response packet) 239 * @_rx_page_addr: (internally used to free response packet) 240 * @flags: can be CMD_* 241 * @len: array of the lengths of the chunks in data 242 * @dataflags: IWL_HCMD_DFL_* 243 * @id: command id of the host command, for wide commands encoding the 244 * version and group as well 245 */ 246 struct iwl_host_cmd { 247 const void *data[IWL_MAX_CMD_TBS_PER_TFD]; 248 struct iwl_rx_packet *resp_pkt; 249 unsigned long _rx_page_addr; 250 u32 _rx_page_order; 251 252 u32 flags; 253 u32 id; 254 u16 len[IWL_MAX_CMD_TBS_PER_TFD]; 255 u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD]; 256 }; 257 258 static inline void iwl_free_resp(struct iwl_host_cmd *cmd) 259 { 260 free_pages(cmd->_rx_page_addr, cmd->_rx_page_order); 261 } 262 263 struct iwl_rx_cmd_buffer { 264 struct page *_page; 265 int _offset; 266 bool _page_stolen; 267 u32 _rx_page_order; 268 unsigned int truesize; 269 u8 status; 270 }; 271 272 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r) 273 { 274 return (void *)((unsigned long)page_address(r->_page) + r->_offset); 275 } 276 277 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r) 278 { 279 return r->_offset; 280 } 281 282 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r) 283 { 284 r->_page_stolen = true; 285 get_page(r->_page); 286 return r->_page; 287 } 288 289 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r) 290 { 291 __free_pages(r->_page, r->_rx_page_order); 292 } 293 294 #define MAX_NO_RECLAIM_CMDS 6 295 296 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) 297 298 /* 299 * Maximum number of HW queues the transport layer 300 * currently supports 301 */ 302 #define IWL_MAX_HW_QUEUES 32 303 #define IWL_MAX_TVQM_QUEUES 512 304 305 #define IWL_MAX_TID_COUNT 8 306 #define IWL_MGMT_TID 15 307 #define IWL_FRAME_LIMIT 64 308 #define IWL_MAX_RX_HW_QUEUES 16 309 310 /** 311 * enum iwl_wowlan_status - WoWLAN image/device status 312 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume 313 * @IWL_D3_STATUS_RESET: device was reset while suspended 314 */ 315 enum iwl_d3_status { 316 IWL_D3_STATUS_ALIVE, 317 IWL_D3_STATUS_RESET, 318 }; 319 320 /** 321 * enum iwl_trans_status: transport status flags 322 * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed 323 * @STATUS_DEVICE_ENABLED: APM is enabled 324 * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up) 325 * @STATUS_INT_ENABLED: interrupts are enabled 326 * @STATUS_RFKILL_HW: the actual HW state of the RF-kill switch 327 * @STATUS_RFKILL_OPMODE: RF-kill state reported to opmode 328 * @STATUS_FW_ERROR: the fw is in error state 329 * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands 330 * are sent 331 * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent 332 * @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation 333 */ 334 enum iwl_trans_status { 335 STATUS_SYNC_HCMD_ACTIVE, 336 STATUS_DEVICE_ENABLED, 337 STATUS_TPOWER_PMI, 338 STATUS_INT_ENABLED, 339 STATUS_RFKILL_HW, 340 STATUS_RFKILL_OPMODE, 341 STATUS_FW_ERROR, 342 STATUS_TRANS_GOING_IDLE, 343 STATUS_TRANS_IDLE, 344 STATUS_TRANS_DEAD, 345 }; 346 347 static inline int 348 iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size) 349 { 350 switch (rb_size) { 351 case IWL_AMSDU_2K: 352 return get_order(2 * 1024); 353 case IWL_AMSDU_4K: 354 return get_order(4 * 1024); 355 case IWL_AMSDU_8K: 356 return get_order(8 * 1024); 357 case IWL_AMSDU_12K: 358 return get_order(12 * 1024); 359 default: 360 WARN_ON(1); 361 return -1; 362 } 363 } 364 365 struct iwl_hcmd_names { 366 u8 cmd_id; 367 const char *const cmd_name; 368 }; 369 370 #define HCMD_NAME(x) \ 371 { .cmd_id = x, .cmd_name = #x } 372 373 struct iwl_hcmd_arr { 374 const struct iwl_hcmd_names *arr; 375 int size; 376 }; 377 378 #define HCMD_ARR(x) \ 379 { .arr = x, .size = ARRAY_SIZE(x) } 380 381 /** 382 * struct iwl_trans_config - transport configuration 383 * 384 * @op_mode: pointer to the upper layer. 385 * @cmd_queue: the index of the command queue. 386 * Must be set before start_fw. 387 * @cmd_fifo: the fifo for host commands 388 * @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue. 389 * @no_reclaim_cmds: Some devices erroneously don't set the 390 * SEQ_RX_FRAME bit on some notifications, this is the 391 * list of such notifications to filter. Max length is 392 * %MAX_NO_RECLAIM_CMDS. 393 * @n_no_reclaim_cmds: # of commands in list 394 * @rx_buf_size: RX buffer size needed for A-MSDUs 395 * if unset 4k will be the RX buffer size 396 * @bc_table_dword: set to true if the BC table expects the byte count to be 397 * in DWORD (as opposed to bytes) 398 * @scd_set_active: should the transport configure the SCD for HCMD queue 399 * @sw_csum_tx: transport should compute the TCP checksum 400 * @command_groups: array of command groups, each member is an array of the 401 * commands in the group; for debugging only 402 * @command_groups_size: number of command groups, to avoid illegal access 403 * @cb_data_offs: offset inside skb->cb to store transport data at, must have 404 * space for at least two pointers 405 */ 406 struct iwl_trans_config { 407 struct iwl_op_mode *op_mode; 408 409 u8 cmd_queue; 410 u8 cmd_fifo; 411 unsigned int cmd_q_wdg_timeout; 412 const u8 *no_reclaim_cmds; 413 unsigned int n_no_reclaim_cmds; 414 415 enum iwl_amsdu_size rx_buf_size; 416 bool bc_table_dword; 417 bool scd_set_active; 418 bool sw_csum_tx; 419 const struct iwl_hcmd_arr *command_groups; 420 int command_groups_size; 421 422 u8 cb_data_offs; 423 }; 424 425 struct iwl_trans_dump_data { 426 u32 len; 427 u8 data[]; 428 }; 429 430 struct iwl_trans; 431 432 struct iwl_trans_txq_scd_cfg { 433 u8 fifo; 434 u8 sta_id; 435 u8 tid; 436 bool aggregate; 437 int frame_limit; 438 }; 439 440 /** 441 * struct iwl_trans_rxq_dma_data - RX queue DMA data 442 * @fr_bd_cb: DMA address of free BD cyclic buffer 443 * @fr_bd_wid: Initial write index of the free BD cyclic buffer 444 * @urbd_stts_wrptr: DMA address of urbd_stts_wrptr 445 * @ur_bd_cb: DMA address of used BD cyclic buffer 446 */ 447 struct iwl_trans_rxq_dma_data { 448 u64 fr_bd_cb; 449 u32 fr_bd_wid; 450 u64 urbd_stts_wrptr; 451 u64 ur_bd_cb; 452 }; 453 454 /** 455 * struct iwl_trans_ops - transport specific operations 456 * 457 * All the handlers MUST be implemented 458 * 459 * @start_hw: starts the HW. If low_power is true, the NIC needs to be taken 460 * out of a low power state. From that point on, the HW can send 461 * interrupts. May sleep. 462 * @op_mode_leave: Turn off the HW RF kill indication if on 463 * May sleep 464 * @start_fw: allocates and inits all the resources for the transport 465 * layer. Also kick a fw image. 466 * May sleep 467 * @fw_alive: called when the fw sends alive notification. If the fw provides 468 * the SCD base address in SRAM, then provide it here, or 0 otherwise. 469 * May sleep 470 * @stop_device: stops the whole device (embedded CPU put to reset) and stops 471 * the HW. If low_power is true, the NIC will be put in low power state. 472 * From that point on, the HW will be stopped but will still issue an 473 * interrupt if the HW RF kill switch is triggered. 474 * This callback must do the right thing and not crash even if %start_hw() 475 * was called but not &start_fw(). May sleep. 476 * @d3_suspend: put the device into the correct mode for WoWLAN during 477 * suspend. This is optional, if not implemented WoWLAN will not be 478 * supported. This callback may sleep. 479 * @d3_resume: resume the device after WoWLAN, enabling the opmode to 480 * talk to the WoWLAN image to get its status. This is optional, if not 481 * implemented WoWLAN will not be supported. This callback may sleep. 482 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted. 483 * If RFkill is asserted in the middle of a SYNC host command, it must 484 * return -ERFKILL straight away. 485 * May sleep only if CMD_ASYNC is not set 486 * @tx: send an skb. The transport relies on the op_mode to zero the 487 * the ieee80211_tx_info->driver_data. If the MPDU is an A-MSDU, all 488 * the CSUM will be taken care of (TCP CSUM and IP header in case of 489 * IPv4). If the MPDU is a single MSDU, the op_mode must compute the IP 490 * header if it is IPv4. 491 * Must be atomic 492 * @reclaim: free packet until ssn. Returns a list of freed packets. 493 * Must be atomic 494 * @txq_enable: setup a queue. To setup an AC queue, use the 495 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before 496 * this one. The op_mode must not configure the HCMD queue. The scheduler 497 * configuration may be %NULL, in which case the hardware will not be 498 * configured. If true is returned, the operation mode needs to increment 499 * the sequence number of the packets routed to this queue because of a 500 * hardware scheduler bug. May sleep. 501 * @txq_disable: de-configure a Tx queue to send AMPDUs 502 * Must be atomic 503 * @txq_set_shared_mode: change Tx queue shared/unshared marking 504 * @wait_tx_queues_empty: wait until tx queues are empty. May sleep. 505 * @wait_txq_empty: wait until specific tx queue is empty. May sleep. 506 * @freeze_txq_timer: prevents the timer of the queue from firing until the 507 * queue is set to awake. Must be atomic. 508 * @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note 509 * that the transport needs to refcount the calls since this function 510 * will be called several times with block = true, and then the queues 511 * need to be unblocked only after the same number of calls with 512 * block = false. 513 * @write8: write a u8 to a register at offset ofs from the BAR 514 * @write32: write a u32 to a register at offset ofs from the BAR 515 * @read32: read a u32 register at offset ofs from the BAR 516 * @read_prph: read a DWORD from a periphery register 517 * @write_prph: write a DWORD to a periphery register 518 * @read_mem: read device's SRAM in DWORD 519 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory 520 * will be zeroed. 521 * @configure: configure parameters required by the transport layer from 522 * the op_mode. May be called several times before start_fw, can't be 523 * called after that. 524 * @set_pmi: set the power pmi state 525 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs. 526 * Sleeping is not allowed between grab_nic_access and 527 * release_nic_access. 528 * @release_nic_access: let the NIC go to sleep. The "flags" parameter 529 * must be the same one that was sent before to the grab_nic_access. 530 * @set_bits_mask - set SRAM register according to value and mask. 531 * @ref: grab a reference to the transport/FW layers, disallowing 532 * certain low power states 533 * @unref: release a reference previously taken with @ref. Note that 534 * initially the reference count is 1, making an initial @unref 535 * necessary to allow low power states. 536 * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last 537 * TX'ed commands and similar. The buffer will be vfree'd by the caller. 538 * Note that the transport must fill in the proper file headers. 539 */ 540 struct iwl_trans_ops { 541 542 int (*start_hw)(struct iwl_trans *iwl_trans, bool low_power); 543 void (*op_mode_leave)(struct iwl_trans *iwl_trans); 544 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw, 545 bool run_in_rfkill); 546 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr); 547 void (*stop_device)(struct iwl_trans *trans, bool low_power); 548 549 void (*d3_suspend)(struct iwl_trans *trans, bool test, bool reset); 550 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status, 551 bool test, bool reset); 552 553 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd); 554 555 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb, 556 struct iwl_device_cmd *dev_cmd, int queue); 557 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn, 558 struct sk_buff_head *skbs); 559 560 bool (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn, 561 const struct iwl_trans_txq_scd_cfg *cfg, 562 unsigned int queue_wdg_timeout); 563 void (*txq_disable)(struct iwl_trans *trans, int queue, 564 bool configure_scd); 565 /* 22000 functions */ 566 int (*txq_alloc)(struct iwl_trans *trans, 567 __le16 flags, u8 sta_id, u8 tid, 568 int cmd_id, int size, 569 unsigned int queue_wdg_timeout); 570 void (*txq_free)(struct iwl_trans *trans, int queue); 571 int (*rxq_dma_data)(struct iwl_trans *trans, int queue, 572 struct iwl_trans_rxq_dma_data *data); 573 574 void (*txq_set_shared_mode)(struct iwl_trans *trans, u32 txq_id, 575 bool shared); 576 577 int (*wait_tx_queues_empty)(struct iwl_trans *trans, u32 txq_bm); 578 int (*wait_txq_empty)(struct iwl_trans *trans, int queue); 579 void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs, 580 bool freeze); 581 void (*block_txq_ptrs)(struct iwl_trans *trans, bool block); 582 583 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val); 584 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val); 585 u32 (*read32)(struct iwl_trans *trans, u32 ofs); 586 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs); 587 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val); 588 int (*read_mem)(struct iwl_trans *trans, u32 addr, 589 void *buf, int dwords); 590 int (*write_mem)(struct iwl_trans *trans, u32 addr, 591 const void *buf, int dwords); 592 void (*configure)(struct iwl_trans *trans, 593 const struct iwl_trans_config *trans_cfg); 594 void (*set_pmi)(struct iwl_trans *trans, bool state); 595 void (*sw_reset)(struct iwl_trans *trans); 596 bool (*grab_nic_access)(struct iwl_trans *trans, unsigned long *flags); 597 void (*release_nic_access)(struct iwl_trans *trans, 598 unsigned long *flags); 599 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask, 600 u32 value); 601 void (*ref)(struct iwl_trans *trans); 602 void (*unref)(struct iwl_trans *trans); 603 int (*suspend)(struct iwl_trans *trans); 604 void (*resume)(struct iwl_trans *trans); 605 606 struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans, 607 u32 dump_mask); 608 }; 609 610 /** 611 * enum iwl_trans_state - state of the transport layer 612 * 613 * @IWL_TRANS_NO_FW: no fw has sent an alive response 614 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response 615 */ 616 enum iwl_trans_state { 617 IWL_TRANS_NO_FW = 0, 618 IWL_TRANS_FW_ALIVE = 1, 619 }; 620 621 /** 622 * DOC: Platform power management 623 * 624 * There are two types of platform power management: system-wide 625 * (WoWLAN) and runtime. 626 * 627 * In system-wide power management the entire platform goes into a low 628 * power state (e.g. idle or suspend to RAM) at the same time and the 629 * device is configured as a wakeup source for the entire platform. 630 * This is usually triggered by userspace activity (e.g. the user 631 * presses the suspend button or a power management daemon decides to 632 * put the platform in low power mode). The device's behavior in this 633 * mode is dictated by the wake-on-WLAN configuration. 634 * 635 * In runtime power management, only the devices which are themselves 636 * idle enter a low power state. This is done at runtime, which means 637 * that the entire system is still running normally. This mode is 638 * usually triggered automatically by the device driver and requires 639 * the ability to enter and exit the low power modes in a very short 640 * time, so there is not much impact in usability. 641 * 642 * The terms used for the device's behavior are as follows: 643 * 644 * - D0: the device is fully powered and the host is awake; 645 * - D3: the device is in low power mode and only reacts to 646 * specific events (e.g. magic-packet received or scan 647 * results found); 648 * - D0I3: the device is in low power mode and reacts to any 649 * activity (e.g. RX); 650 * 651 * These terms reflect the power modes in the firmware and are not to 652 * be confused with the physical device power state. The NIC can be 653 * in D0I3 mode even if, for instance, the PCI device is in D3 state. 654 */ 655 656 /** 657 * enum iwl_plat_pm_mode - platform power management mode 658 * 659 * This enumeration describes the device's platform power management 660 * behavior when in idle mode (i.e. runtime power management) or when 661 * in system-wide suspend (i.e WoWLAN). 662 * 663 * @IWL_PLAT_PM_MODE_DISABLED: power management is disabled for this 664 * device. At runtime, this means that nothing happens and the 665 * device always remains in active. In system-wide suspend mode, 666 * it means that the all connections will be closed automatically 667 * by mac80211 before the platform is suspended. 668 * @IWL_PLAT_PM_MODE_D3: the device goes into D3 mode (i.e. WoWLAN). 669 * For runtime power management, this mode is not officially 670 * supported. 671 * @IWL_PLAT_PM_MODE_D0I3: the device goes into D0I3 mode. 672 */ 673 enum iwl_plat_pm_mode { 674 IWL_PLAT_PM_MODE_DISABLED, 675 IWL_PLAT_PM_MODE_D3, 676 IWL_PLAT_PM_MODE_D0I3, 677 }; 678 679 /* Max time to wait for trans to become idle/non-idle on d0i3 680 * enter/exit (in msecs). 681 */ 682 #define IWL_TRANS_IDLE_TIMEOUT 2000 683 #define IWL_MAX_DEBUG_ALLOCATIONS 1 684 685 /** 686 * struct iwl_dram_data 687 * @physical: page phy pointer 688 * @block: pointer to the allocated block/page 689 * @size: size of the block/page 690 */ 691 struct iwl_dram_data { 692 dma_addr_t physical; 693 void *block; 694 int size; 695 }; 696 697 /** 698 * struct iwl_trans - transport common data 699 * 700 * @ops - pointer to iwl_trans_ops 701 * @op_mode - pointer to the op_mode 702 * @cfg - pointer to the configuration 703 * @drv - pointer to iwl_drv 704 * @status: a bit-mask of transport status flags 705 * @dev - pointer to struct device * that represents the device 706 * @max_skb_frags: maximum number of fragments an SKB can have when transmitted. 707 * 0 indicates that frag SKBs (NETIF_F_SG) aren't supported. 708 * @hw_rf_id a u32 with the device RF ID 709 * @hw_id: a u32 with the ID of the device / sub-device. 710 * Set during transport allocation. 711 * @hw_id_str: a string with info about HW ID. Set during transport allocation. 712 * @pm_support: set to true in start_hw if link pm is supported 713 * @ltr_enabled: set to true if the LTR is enabled 714 * @wide_cmd_header: true when ucode supports wide command header format 715 * @num_rx_queues: number of RX queues allocated by the transport; 716 * the transport must set this before calling iwl_drv_start() 717 * @iml_len: the length of the image loader 718 * @iml: a pointer to the image loader itself 719 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only. 720 * The user should use iwl_trans_{alloc,free}_tx_cmd. 721 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before 722 * starting the firmware, used for tracing 723 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the 724 * start of the 802.11 header in the @rx_mpdu_cmd 725 * @dflt_pwr_limit: default power limit fetched from the platform (ACPI) 726 * @dbg_dest_tlv: points to the destination TLV for debug 727 * @dbg_conf_tlv: array of pointers to configuration TLVs for debug 728 * @dbg_trigger_tlv: array of pointers to triggers TLVs for debug 729 * @dbg_n_dest_reg: num of reg_ops in %dbg_dest_tlv 730 * @num_blocks: number of blocks in fw_mon 731 * @fw_mon: address of the buffers for firmware monitor 732 * @system_pm_mode: the system-wide power management mode in use. 733 * This mode is set dynamically, depending on the WoWLAN values 734 * configured from the userspace at runtime. 735 * @runtime_pm_mode: the runtime power management mode in use. This 736 * mode is set during the initialization phase and is not 737 * supposed to change during runtime. 738 */ 739 struct iwl_trans { 740 const struct iwl_trans_ops *ops; 741 struct iwl_op_mode *op_mode; 742 const struct iwl_cfg *cfg; 743 struct iwl_drv *drv; 744 enum iwl_trans_state state; 745 unsigned long status; 746 747 struct device *dev; 748 u32 max_skb_frags; 749 u32 hw_rev; 750 u32 hw_rf_id; 751 u32 hw_id; 752 char hw_id_str[52]; 753 754 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size; 755 756 bool pm_support; 757 bool ltr_enabled; 758 759 const struct iwl_hcmd_arr *command_groups; 760 int command_groups_size; 761 bool wide_cmd_header; 762 763 u8 num_rx_queues; 764 765 size_t iml_len; 766 u8 *iml; 767 768 /* The following fields are internal only */ 769 struct kmem_cache *dev_cmd_pool; 770 char dev_cmd_pool_name[50]; 771 772 struct dentry *dbgfs_dir; 773 774 #ifdef CONFIG_LOCKDEP 775 struct lockdep_map sync_cmd_lockdep_map; 776 #endif 777 778 struct iwl_apply_point_data apply_points[IWL_FW_INI_APPLY_NUM]; 779 struct iwl_apply_point_data apply_points_ext[IWL_FW_INI_APPLY_NUM]; 780 781 bool external_ini_loaded; 782 783 const struct iwl_fw_dbg_dest_tlv_v1 *dbg_dest_tlv; 784 const struct iwl_fw_dbg_conf_tlv *dbg_conf_tlv[FW_DBG_CONF_MAX]; 785 struct iwl_fw_dbg_trigger_tlv * const *dbg_trigger_tlv; 786 u8 dbg_n_dest_reg; 787 int num_blocks; 788 struct iwl_dram_data fw_mon[IWL_MAX_DEBUG_ALLOCATIONS]; 789 790 enum iwl_plat_pm_mode system_pm_mode; 791 enum iwl_plat_pm_mode runtime_pm_mode; 792 bool suspending; 793 794 /* pointer to trans specific struct */ 795 /*Ensure that this pointer will always be aligned to sizeof pointer */ 796 char trans_specific[0] __aligned(sizeof(void *)); 797 }; 798 799 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id); 800 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans); 801 802 static inline void iwl_trans_configure(struct iwl_trans *trans, 803 const struct iwl_trans_config *trans_cfg) 804 { 805 trans->op_mode = trans_cfg->op_mode; 806 807 trans->ops->configure(trans, trans_cfg); 808 WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg)); 809 } 810 811 static inline int _iwl_trans_start_hw(struct iwl_trans *trans, bool low_power) 812 { 813 might_sleep(); 814 815 return trans->ops->start_hw(trans, low_power); 816 } 817 818 static inline int iwl_trans_start_hw(struct iwl_trans *trans) 819 { 820 return trans->ops->start_hw(trans, true); 821 } 822 823 static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans) 824 { 825 might_sleep(); 826 827 if (trans->ops->op_mode_leave) 828 trans->ops->op_mode_leave(trans); 829 830 trans->op_mode = NULL; 831 832 trans->state = IWL_TRANS_NO_FW; 833 } 834 835 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr) 836 { 837 might_sleep(); 838 839 trans->state = IWL_TRANS_FW_ALIVE; 840 841 trans->ops->fw_alive(trans, scd_addr); 842 } 843 844 static inline int iwl_trans_start_fw(struct iwl_trans *trans, 845 const struct fw_img *fw, 846 bool run_in_rfkill) 847 { 848 might_sleep(); 849 850 WARN_ON_ONCE(!trans->rx_mpdu_cmd); 851 852 clear_bit(STATUS_FW_ERROR, &trans->status); 853 return trans->ops->start_fw(trans, fw, run_in_rfkill); 854 } 855 856 static inline void _iwl_trans_stop_device(struct iwl_trans *trans, 857 bool low_power) 858 { 859 might_sleep(); 860 861 trans->ops->stop_device(trans, low_power); 862 863 trans->state = IWL_TRANS_NO_FW; 864 } 865 866 static inline void iwl_trans_stop_device(struct iwl_trans *trans) 867 { 868 _iwl_trans_stop_device(trans, true); 869 } 870 871 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test, 872 bool reset) 873 { 874 might_sleep(); 875 if (trans->ops->d3_suspend) 876 trans->ops->d3_suspend(trans, test, reset); 877 } 878 879 static inline int iwl_trans_d3_resume(struct iwl_trans *trans, 880 enum iwl_d3_status *status, 881 bool test, bool reset) 882 { 883 might_sleep(); 884 if (!trans->ops->d3_resume) 885 return 0; 886 887 return trans->ops->d3_resume(trans, status, test, reset); 888 } 889 890 static inline int iwl_trans_suspend(struct iwl_trans *trans) 891 { 892 if (!trans->ops->suspend) 893 return 0; 894 895 return trans->ops->suspend(trans); 896 } 897 898 static inline void iwl_trans_resume(struct iwl_trans *trans) 899 { 900 if (trans->ops->resume) 901 trans->ops->resume(trans); 902 } 903 904 static inline struct iwl_trans_dump_data * 905 iwl_trans_dump_data(struct iwl_trans *trans, u32 dump_mask) 906 { 907 if (!trans->ops->dump_data) 908 return NULL; 909 return trans->ops->dump_data(trans, dump_mask); 910 } 911 912 static inline struct iwl_device_cmd * 913 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans) 914 { 915 return kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC); 916 } 917 918 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd); 919 920 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans, 921 struct iwl_device_cmd *dev_cmd) 922 { 923 kmem_cache_free(trans->dev_cmd_pool, dev_cmd); 924 } 925 926 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, 927 struct iwl_device_cmd *dev_cmd, int queue) 928 { 929 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) 930 return -EIO; 931 932 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 933 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 934 return -EIO; 935 } 936 937 return trans->ops->tx(trans, skb, dev_cmd, queue); 938 } 939 940 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue, 941 int ssn, struct sk_buff_head *skbs) 942 { 943 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 944 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 945 return; 946 } 947 948 trans->ops->reclaim(trans, queue, ssn, skbs); 949 } 950 951 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue, 952 bool configure_scd) 953 { 954 trans->ops->txq_disable(trans, queue, configure_scd); 955 } 956 957 static inline bool 958 iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn, 959 const struct iwl_trans_txq_scd_cfg *cfg, 960 unsigned int queue_wdg_timeout) 961 { 962 might_sleep(); 963 964 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 965 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 966 return false; 967 } 968 969 return trans->ops->txq_enable(trans, queue, ssn, 970 cfg, queue_wdg_timeout); 971 } 972 973 static inline int 974 iwl_trans_get_rxq_dma_data(struct iwl_trans *trans, int queue, 975 struct iwl_trans_rxq_dma_data *data) 976 { 977 if (WARN_ON_ONCE(!trans->ops->rxq_dma_data)) 978 return -ENOTSUPP; 979 980 return trans->ops->rxq_dma_data(trans, queue, data); 981 } 982 983 static inline void 984 iwl_trans_txq_free(struct iwl_trans *trans, int queue) 985 { 986 if (WARN_ON_ONCE(!trans->ops->txq_free)) 987 return; 988 989 trans->ops->txq_free(trans, queue); 990 } 991 992 static inline int 993 iwl_trans_txq_alloc(struct iwl_trans *trans, 994 __le16 flags, u8 sta_id, u8 tid, 995 int cmd_id, int size, 996 unsigned int wdg_timeout) 997 { 998 might_sleep(); 999 1000 if (WARN_ON_ONCE(!trans->ops->txq_alloc)) 1001 return -ENOTSUPP; 1002 1003 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1004 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1005 return -EIO; 1006 } 1007 1008 return trans->ops->txq_alloc(trans, flags, sta_id, tid, 1009 cmd_id, size, wdg_timeout); 1010 } 1011 1012 static inline void iwl_trans_txq_set_shared_mode(struct iwl_trans *trans, 1013 int queue, bool shared_mode) 1014 { 1015 if (trans->ops->txq_set_shared_mode) 1016 trans->ops->txq_set_shared_mode(trans, queue, shared_mode); 1017 } 1018 1019 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue, 1020 int fifo, int sta_id, int tid, 1021 int frame_limit, u16 ssn, 1022 unsigned int queue_wdg_timeout) 1023 { 1024 struct iwl_trans_txq_scd_cfg cfg = { 1025 .fifo = fifo, 1026 .sta_id = sta_id, 1027 .tid = tid, 1028 .frame_limit = frame_limit, 1029 .aggregate = sta_id >= 0, 1030 }; 1031 1032 iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout); 1033 } 1034 1035 static inline 1036 void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo, 1037 unsigned int queue_wdg_timeout) 1038 { 1039 struct iwl_trans_txq_scd_cfg cfg = { 1040 .fifo = fifo, 1041 .sta_id = -1, 1042 .tid = IWL_MAX_TID_COUNT, 1043 .frame_limit = IWL_FRAME_LIMIT, 1044 .aggregate = false, 1045 }; 1046 1047 iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout); 1048 } 1049 1050 static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans, 1051 unsigned long txqs, 1052 bool freeze) 1053 { 1054 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1055 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1056 return; 1057 } 1058 1059 if (trans->ops->freeze_txq_timer) 1060 trans->ops->freeze_txq_timer(trans, txqs, freeze); 1061 } 1062 1063 static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans, 1064 bool block) 1065 { 1066 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1067 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1068 return; 1069 } 1070 1071 if (trans->ops->block_txq_ptrs) 1072 trans->ops->block_txq_ptrs(trans, block); 1073 } 1074 1075 static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans, 1076 u32 txqs) 1077 { 1078 if (WARN_ON_ONCE(!trans->ops->wait_tx_queues_empty)) 1079 return -ENOTSUPP; 1080 1081 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1082 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1083 return -EIO; 1084 } 1085 1086 return trans->ops->wait_tx_queues_empty(trans, txqs); 1087 } 1088 1089 static inline int iwl_trans_wait_txq_empty(struct iwl_trans *trans, int queue) 1090 { 1091 if (WARN_ON_ONCE(!trans->ops->wait_txq_empty)) 1092 return -ENOTSUPP; 1093 1094 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1095 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1096 return -EIO; 1097 } 1098 1099 return trans->ops->wait_txq_empty(trans, queue); 1100 } 1101 1102 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val) 1103 { 1104 trans->ops->write8(trans, ofs, val); 1105 } 1106 1107 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val) 1108 { 1109 trans->ops->write32(trans, ofs, val); 1110 } 1111 1112 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs) 1113 { 1114 return trans->ops->read32(trans, ofs); 1115 } 1116 1117 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs) 1118 { 1119 return trans->ops->read_prph(trans, ofs); 1120 } 1121 1122 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs, 1123 u32 val) 1124 { 1125 return trans->ops->write_prph(trans, ofs, val); 1126 } 1127 1128 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr, 1129 void *buf, int dwords) 1130 { 1131 return trans->ops->read_mem(trans, addr, buf, dwords); 1132 } 1133 1134 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \ 1135 do { \ 1136 if (__builtin_constant_p(bufsize)) \ 1137 BUILD_BUG_ON((bufsize) % sizeof(u32)); \ 1138 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\ 1139 } while (0) 1140 1141 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr) 1142 { 1143 u32 value; 1144 1145 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1))) 1146 return 0xa5a5a5a5; 1147 1148 return value; 1149 } 1150 1151 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr, 1152 const void *buf, int dwords) 1153 { 1154 return trans->ops->write_mem(trans, addr, buf, dwords); 1155 } 1156 1157 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr, 1158 u32 val) 1159 { 1160 return iwl_trans_write_mem(trans, addr, &val, 1); 1161 } 1162 1163 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state) 1164 { 1165 if (trans->ops->set_pmi) 1166 trans->ops->set_pmi(trans, state); 1167 } 1168 1169 static inline void iwl_trans_sw_reset(struct iwl_trans *trans) 1170 { 1171 if (trans->ops->sw_reset) 1172 trans->ops->sw_reset(trans); 1173 } 1174 1175 static inline void 1176 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value) 1177 { 1178 trans->ops->set_bits_mask(trans, reg, mask, value); 1179 } 1180 1181 #define iwl_trans_grab_nic_access(trans, flags) \ 1182 __cond_lock(nic_access, \ 1183 likely((trans)->ops->grab_nic_access(trans, flags))) 1184 1185 static inline void __releases(nic_access) 1186 iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags) 1187 { 1188 trans->ops->release_nic_access(trans, flags); 1189 __release(nic_access); 1190 } 1191 1192 static inline void iwl_trans_fw_error(struct iwl_trans *trans) 1193 { 1194 if (WARN_ON_ONCE(!trans->op_mode)) 1195 return; 1196 1197 /* prevent double restarts due to the same erroneous FW */ 1198 if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status)) 1199 iwl_op_mode_nic_error(trans->op_mode); 1200 } 1201 1202 /***************************************************** 1203 * transport helper functions 1204 *****************************************************/ 1205 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size, 1206 struct device *dev, 1207 const struct iwl_cfg *cfg, 1208 const struct iwl_trans_ops *ops); 1209 void iwl_trans_free(struct iwl_trans *trans); 1210 void iwl_trans_ref(struct iwl_trans *trans); 1211 void iwl_trans_unref(struct iwl_trans *trans); 1212 1213 /***************************************************** 1214 * driver (transport) register/unregister functions 1215 ******************************************************/ 1216 int __must_check iwl_pci_register_driver(void); 1217 void iwl_pci_unregister_driver(void); 1218 1219 #endif /* __iwl_trans_h__ */ 1220