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 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #ifndef __iwl_trans_h__ 68 #define __iwl_trans_h__ 69 70 #include <linux/ieee80211.h> 71 #include <linux/mm.h> /* for page_address */ 72 #include <linux/lockdep.h> 73 #include <linux/kernel.h> 74 75 #include "iwl-debug.h" 76 #include "iwl-config.h" 77 #include "fw/img.h" 78 #include "iwl-op-mode.h" 79 #include "fw/api/cmdhdr.h" 80 #include "fw/api/txq.h" 81 82 /** 83 * DOC: Transport layer - what is it ? 84 * 85 * The transport layer is the layer that deals with the HW directly. It provides 86 * an abstraction of the underlying HW to the upper layer. The transport layer 87 * doesn't provide any policy, algorithm or anything of this kind, but only 88 * mechanisms to make the HW do something. It is not completely stateless but 89 * close to it. 90 * We will have an implementation for each different supported bus. 91 */ 92 93 /** 94 * DOC: Life cycle of the transport layer 95 * 96 * The transport layer has a very precise life cycle. 97 * 98 * 1) A helper function is called during the module initialization and 99 * registers the bus driver's ops with the transport's alloc function. 100 * 2) Bus's probe calls to the transport layer's allocation functions. 101 * Of course this function is bus specific. 102 * 3) This allocation functions will spawn the upper layer which will 103 * register mac80211. 104 * 105 * 4) At some point (i.e. mac80211's start call), the op_mode will call 106 * the following sequence: 107 * start_hw 108 * start_fw 109 * 110 * 5) Then when finished (or reset): 111 * stop_device 112 * 113 * 6) Eventually, the free function will be called. 114 */ 115 116 #define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */ 117 #define FH_RSCSR_FRAME_INVALID 0x55550000 118 #define FH_RSCSR_FRAME_ALIGN 0x40 119 #define FH_RSCSR_RPA_EN BIT(25) 120 #define FH_RSCSR_RADA_EN BIT(26) 121 #define FH_RSCSR_RXQ_POS 16 122 #define FH_RSCSR_RXQ_MASK 0x3F0000 123 124 struct iwl_rx_packet { 125 /* 126 * The first 4 bytes of the RX frame header contain both the RX frame 127 * size and some flags. 128 * Bit fields: 129 * 31: flag flush RB request 130 * 30: flag ignore TC (terminal counter) request 131 * 29: flag fast IRQ request 132 * 28-27: Reserved 133 * 26: RADA enabled 134 * 25: Offload enabled 135 * 24: RPF enabled 136 * 23: RSS enabled 137 * 22: Checksum enabled 138 * 21-16: RX queue 139 * 15-14: Reserved 140 * 13-00: RX frame size 141 */ 142 __le32 len_n_flags; 143 struct iwl_cmd_header hdr; 144 u8 data[]; 145 } __packed; 146 147 static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt) 148 { 149 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; 150 } 151 152 static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt) 153 { 154 return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr); 155 } 156 157 /** 158 * enum CMD_MODE - how to send the host commands ? 159 * 160 * @CMD_ASYNC: Return right away and don't wait for the response 161 * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of 162 * the response. The caller needs to call iwl_free_resp when done. 163 * @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the 164 * command queue, but after other high priority commands. Valid only 165 * with CMD_ASYNC. 166 * @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle. 167 * @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle. 168 * @CMD_WAKE_UP_TRANS: The command response should wake up the trans 169 * (i.e. mark it as non-idle). 170 * @CMD_WANT_ASYNC_CALLBACK: the op_mode's async callback function must be 171 * called after this command completes. Valid only with CMD_ASYNC. 172 */ 173 enum CMD_MODE { 174 CMD_ASYNC = BIT(0), 175 CMD_WANT_SKB = BIT(1), 176 CMD_SEND_IN_RFKILL = BIT(2), 177 CMD_HIGH_PRIO = BIT(3), 178 CMD_SEND_IN_IDLE = BIT(4), 179 CMD_MAKE_TRANS_IDLE = BIT(5), 180 CMD_WAKE_UP_TRANS = BIT(6), 181 CMD_WANT_ASYNC_CALLBACK = BIT(7), 182 }; 183 184 #define DEF_CMD_PAYLOAD_SIZE 320 185 186 /** 187 * struct iwl_device_cmd 188 * 189 * For allocation of the command and tx queues, this establishes the overall 190 * size of the largest command we send to uCode, except for commands that 191 * aren't fully copied and use other TFD space. 192 */ 193 struct iwl_device_cmd { 194 union { 195 struct { 196 struct iwl_cmd_header hdr; /* uCode API */ 197 u8 payload[DEF_CMD_PAYLOAD_SIZE]; 198 }; 199 struct { 200 struct iwl_cmd_header_wide hdr_wide; 201 u8 payload_wide[DEF_CMD_PAYLOAD_SIZE - 202 sizeof(struct iwl_cmd_header_wide) + 203 sizeof(struct iwl_cmd_header)]; 204 }; 205 }; 206 } __packed; 207 208 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd)) 209 210 /* 211 * number of transfer buffers (fragments) per transmit frame descriptor; 212 * this is just the driver's idea, the hardware supports 20 213 */ 214 #define IWL_MAX_CMD_TBS_PER_TFD 2 215 216 /** 217 * enum iwl_hcmd_dataflag - flag for each one of the chunks of the command 218 * 219 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's 220 * ring. The transport layer doesn't map the command's buffer to DMA, but 221 * rather copies it to a previously allocated DMA buffer. This flag tells 222 * the transport layer not to copy the command, but to map the existing 223 * buffer (that is passed in) instead. This saves the memcpy and allows 224 * commands that are bigger than the fixed buffer to be submitted. 225 * Note that a TFD entry after a NOCOPY one cannot be a normal copied one. 226 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this 227 * chunk internally and free it again after the command completes. This 228 * can (currently) be used only once per command. 229 * Note that a TFD entry after a DUP one cannot be a normal copied one. 230 */ 231 enum iwl_hcmd_dataflag { 232 IWL_HCMD_DFL_NOCOPY = BIT(0), 233 IWL_HCMD_DFL_DUP = BIT(1), 234 }; 235 236 /** 237 * struct iwl_host_cmd - Host command to the uCode 238 * 239 * @data: array of chunks that composes the data of the host command 240 * @resp_pkt: response packet, if %CMD_WANT_SKB was set 241 * @_rx_page_order: (internally used to free response packet) 242 * @_rx_page_addr: (internally used to free response packet) 243 * @flags: can be CMD_* 244 * @len: array of the lengths of the chunks in data 245 * @dataflags: IWL_HCMD_DFL_* 246 * @id: command id of the host command, for wide commands encoding the 247 * version and group as well 248 */ 249 struct iwl_host_cmd { 250 const void *data[IWL_MAX_CMD_TBS_PER_TFD]; 251 struct iwl_rx_packet *resp_pkt; 252 unsigned long _rx_page_addr; 253 u32 _rx_page_order; 254 255 u32 flags; 256 u32 id; 257 u16 len[IWL_MAX_CMD_TBS_PER_TFD]; 258 u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD]; 259 }; 260 261 static inline void iwl_free_resp(struct iwl_host_cmd *cmd) 262 { 263 free_pages(cmd->_rx_page_addr, cmd->_rx_page_order); 264 } 265 266 struct iwl_rx_cmd_buffer { 267 struct page *_page; 268 int _offset; 269 bool _page_stolen; 270 u32 _rx_page_order; 271 unsigned int truesize; 272 }; 273 274 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r) 275 { 276 return (void *)((unsigned long)page_address(r->_page) + r->_offset); 277 } 278 279 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r) 280 { 281 return r->_offset; 282 } 283 284 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r) 285 { 286 r->_page_stolen = true; 287 get_page(r->_page); 288 return r->_page; 289 } 290 291 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r) 292 { 293 __free_pages(r->_page, r->_rx_page_order); 294 } 295 296 #define MAX_NO_RECLAIM_CMDS 6 297 298 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) 299 300 /* 301 * Maximum number of HW queues the transport layer 302 * currently supports 303 */ 304 #define IWL_MAX_HW_QUEUES 32 305 #define IWL_MAX_TVQM_QUEUES 512 306 307 #define IWL_MAX_TID_COUNT 8 308 #define IWL_MGMT_TID 15 309 #define IWL_FRAME_LIMIT 64 310 #define IWL_MAX_RX_HW_QUEUES 16 311 312 /** 313 * enum iwl_wowlan_status - WoWLAN image/device status 314 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume 315 * @IWL_D3_STATUS_RESET: device was reset while suspended 316 */ 317 enum iwl_d3_status { 318 IWL_D3_STATUS_ALIVE, 319 IWL_D3_STATUS_RESET, 320 }; 321 322 /** 323 * enum iwl_trans_status: transport status flags 324 * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed 325 * @STATUS_DEVICE_ENABLED: APM is enabled 326 * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up) 327 * @STATUS_INT_ENABLED: interrupts are enabled 328 * @STATUS_RFKILL_HW: the actual HW state of the RF-kill switch 329 * @STATUS_RFKILL_OPMODE: RF-kill state reported to opmode 330 * @STATUS_FW_ERROR: the fw is in error state 331 * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands 332 * are sent 333 * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent 334 * @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation 335 */ 336 enum iwl_trans_status { 337 STATUS_SYNC_HCMD_ACTIVE, 338 STATUS_DEVICE_ENABLED, 339 STATUS_TPOWER_PMI, 340 STATUS_INT_ENABLED, 341 STATUS_RFKILL_HW, 342 STATUS_RFKILL_OPMODE, 343 STATUS_FW_ERROR, 344 STATUS_TRANS_GOING_IDLE, 345 STATUS_TRANS_IDLE, 346 STATUS_TRANS_DEAD, 347 }; 348 349 static inline int 350 iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size) 351 { 352 switch (rb_size) { 353 case IWL_AMSDU_2K: 354 return get_order(2 * 1024); 355 case IWL_AMSDU_4K: 356 return get_order(4 * 1024); 357 case IWL_AMSDU_8K: 358 return get_order(8 * 1024); 359 case IWL_AMSDU_12K: 360 return get_order(12 * 1024); 361 default: 362 WARN_ON(1); 363 return -1; 364 } 365 } 366 367 struct iwl_hcmd_names { 368 u8 cmd_id; 369 const char *const cmd_name; 370 }; 371 372 #define HCMD_NAME(x) \ 373 { .cmd_id = x, .cmd_name = #x } 374 375 struct iwl_hcmd_arr { 376 const struct iwl_hcmd_names *arr; 377 int size; 378 }; 379 380 #define HCMD_ARR(x) \ 381 { .arr = x, .size = ARRAY_SIZE(x) } 382 383 /** 384 * struct iwl_trans_config - transport configuration 385 * 386 * @op_mode: pointer to the upper layer. 387 * @cmd_queue: the index of the command queue. 388 * Must be set before start_fw. 389 * @cmd_fifo: the fifo for host commands 390 * @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue. 391 * @no_reclaim_cmds: Some devices erroneously don't set the 392 * SEQ_RX_FRAME bit on some notifications, this is the 393 * list of such notifications to filter. Max length is 394 * %MAX_NO_RECLAIM_CMDS. 395 * @n_no_reclaim_cmds: # of commands in list 396 * @rx_buf_size: RX buffer size needed for A-MSDUs 397 * if unset 4k will be the RX buffer size 398 * @bc_table_dword: set to true if the BC table expects the byte count to be 399 * in DWORD (as opposed to bytes) 400 * @scd_set_active: should the transport configure the SCD for HCMD queue 401 * @sw_csum_tx: transport should compute the TCP checksum 402 * @command_groups: array of command groups, each member is an array of the 403 * commands in the group; for debugging only 404 * @command_groups_size: number of command groups, to avoid illegal access 405 * @cb_data_offs: offset inside skb->cb to store transport data at, must have 406 * space for at least two pointers 407 */ 408 struct iwl_trans_config { 409 struct iwl_op_mode *op_mode; 410 411 u8 cmd_queue; 412 u8 cmd_fifo; 413 unsigned int cmd_q_wdg_timeout; 414 const u8 *no_reclaim_cmds; 415 unsigned int n_no_reclaim_cmds; 416 417 enum iwl_amsdu_size rx_buf_size; 418 bool bc_table_dword; 419 bool scd_set_active; 420 bool sw_csum_tx; 421 const struct iwl_hcmd_arr *command_groups; 422 int command_groups_size; 423 424 u8 cb_data_offs; 425 }; 426 427 struct iwl_trans_dump_data { 428 u32 len; 429 u8 data[]; 430 }; 431 432 struct iwl_trans; 433 434 struct iwl_trans_txq_scd_cfg { 435 u8 fifo; 436 u8 sta_id; 437 u8 tid; 438 bool aggregate; 439 int frame_limit; 440 }; 441 442 /** 443 * struct iwl_trans_rxq_dma_data - RX queue DMA data 444 * @fr_bd_cb: DMA address of free BD cyclic buffer 445 * @fr_bd_wid: Initial write index of the free BD cyclic buffer 446 * @urbd_stts_wrptr: DMA address of urbd_stts_wrptr 447 * @ur_bd_cb: DMA address of used BD cyclic buffer 448 */ 449 struct iwl_trans_rxq_dma_data { 450 u64 fr_bd_cb; 451 u32 fr_bd_wid; 452 u64 urbd_stts_wrptr; 453 u64 ur_bd_cb; 454 }; 455 456 /** 457 * struct iwl_trans_ops - transport specific operations 458 * 459 * All the handlers MUST be implemented 460 * 461 * @start_hw: starts the HW. If low_power is true, the NIC needs to be taken 462 * out of a low power state. From that point on, the HW can send 463 * interrupts. May sleep. 464 * @op_mode_leave: Turn off the HW RF kill indication if on 465 * May sleep 466 * @start_fw: allocates and inits all the resources for the transport 467 * layer. Also kick a fw image. 468 * May sleep 469 * @fw_alive: called when the fw sends alive notification. If the fw provides 470 * the SCD base address in SRAM, then provide it here, or 0 otherwise. 471 * May sleep 472 * @stop_device: stops the whole device (embedded CPU put to reset) and stops 473 * the HW. If low_power is true, the NIC will be put in low power state. 474 * From that point on, the HW will be stopped but will still issue an 475 * interrupt if the HW RF kill switch is triggered. 476 * This callback must do the right thing and not crash even if %start_hw() 477 * was called but not &start_fw(). May sleep. 478 * @d3_suspend: put the device into the correct mode for WoWLAN during 479 * suspend. This is optional, if not implemented WoWLAN will not be 480 * supported. This callback may sleep. 481 * @d3_resume: resume the device after WoWLAN, enabling the opmode to 482 * talk to the WoWLAN image to get its status. This is optional, if not 483 * implemented WoWLAN will not be supported. This callback may sleep. 484 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted. 485 * If RFkill is asserted in the middle of a SYNC host command, it must 486 * return -ERFKILL straight away. 487 * May sleep only if CMD_ASYNC is not set 488 * @tx: send an skb. The transport relies on the op_mode to zero the 489 * the ieee80211_tx_info->driver_data. If the MPDU is an A-MSDU, all 490 * the CSUM will be taken care of (TCP CSUM and IP header in case of 491 * IPv4). If the MPDU is a single MSDU, the op_mode must compute the IP 492 * header if it is IPv4. 493 * Must be atomic 494 * @reclaim: free packet until ssn. Returns a list of freed packets. 495 * Must be atomic 496 * @txq_enable: setup a queue. To setup an AC queue, use the 497 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before 498 * this one. The op_mode must not configure the HCMD queue. The scheduler 499 * configuration may be %NULL, in which case the hardware will not be 500 * configured. If true is returned, the operation mode needs to increment 501 * the sequence number of the packets routed to this queue because of a 502 * hardware scheduler bug. May sleep. 503 * @txq_disable: de-configure a Tx queue to send AMPDUs 504 * Must be atomic 505 * @txq_set_shared_mode: change Tx queue shared/unshared marking 506 * @wait_tx_queues_empty: wait until tx queues are empty. May sleep. 507 * @wait_txq_empty: wait until specific tx queue is empty. May sleep. 508 * @freeze_txq_timer: prevents the timer of the queue from firing until the 509 * queue is set to awake. Must be atomic. 510 * @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note 511 * that the transport needs to refcount the calls since this function 512 * will be called several times with block = true, and then the queues 513 * need to be unblocked only after the same number of calls with 514 * block = false. 515 * @write8: write a u8 to a register at offset ofs from the BAR 516 * @write32: write a u32 to a register at offset ofs from the BAR 517 * @read32: read a u32 register at offset ofs from the BAR 518 * @read_prph: read a DWORD from a periphery register 519 * @write_prph: write a DWORD to a periphery register 520 * @read_mem: read device's SRAM in DWORD 521 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory 522 * will be zeroed. 523 * @configure: configure parameters required by the transport layer from 524 * the op_mode. May be called several times before start_fw, can't be 525 * called after that. 526 * @set_pmi: set the power pmi state 527 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs. 528 * Sleeping is not allowed between grab_nic_access and 529 * release_nic_access. 530 * @release_nic_access: let the NIC go to sleep. The "flags" parameter 531 * must be the same one that was sent before to the grab_nic_access. 532 * @set_bits_mask - set SRAM register according to value and mask. 533 * @ref: grab a reference to the transport/FW layers, disallowing 534 * certain low power states 535 * @unref: release a reference previously taken with @ref. Note that 536 * initially the reference count is 1, making an initial @unref 537 * necessary to allow low power states. 538 * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last 539 * TX'ed commands and similar. The buffer will be vfree'd by the caller. 540 * Note that the transport must fill in the proper file headers. 541 * @dump_regs: dump using IWL_ERR configuration space and memory mapped 542 * registers of the device to diagnose failure, e.g., when HW becomes 543 * inaccessible. 544 */ 545 struct iwl_trans_ops { 546 547 int (*start_hw)(struct iwl_trans *iwl_trans, bool low_power); 548 void (*op_mode_leave)(struct iwl_trans *iwl_trans); 549 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw, 550 bool run_in_rfkill); 551 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr); 552 void (*stop_device)(struct iwl_trans *trans, bool low_power); 553 554 void (*d3_suspend)(struct iwl_trans *trans, bool test, bool reset); 555 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status, 556 bool test, bool reset); 557 558 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd); 559 560 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb, 561 struct iwl_device_cmd *dev_cmd, int queue); 562 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn, 563 struct sk_buff_head *skbs); 564 565 bool (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn, 566 const struct iwl_trans_txq_scd_cfg *cfg, 567 unsigned int queue_wdg_timeout); 568 void (*txq_disable)(struct iwl_trans *trans, int queue, 569 bool configure_scd); 570 /* 22000 functions */ 571 int (*txq_alloc)(struct iwl_trans *trans, 572 struct iwl_tx_queue_cfg_cmd *cmd, 573 int cmd_id, int size, 574 unsigned int queue_wdg_timeout); 575 void (*txq_free)(struct iwl_trans *trans, int queue); 576 int (*rxq_dma_data)(struct iwl_trans *trans, int queue, 577 struct iwl_trans_rxq_dma_data *data); 578 579 void (*txq_set_shared_mode)(struct iwl_trans *trans, u32 txq_id, 580 bool shared); 581 582 int (*wait_tx_queues_empty)(struct iwl_trans *trans, u32 txq_bm); 583 int (*wait_txq_empty)(struct iwl_trans *trans, int queue); 584 void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs, 585 bool freeze); 586 void (*block_txq_ptrs)(struct iwl_trans *trans, bool block); 587 588 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val); 589 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val); 590 u32 (*read32)(struct iwl_trans *trans, u32 ofs); 591 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs); 592 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val); 593 int (*read_mem)(struct iwl_trans *trans, u32 addr, 594 void *buf, int dwords); 595 int (*write_mem)(struct iwl_trans *trans, u32 addr, 596 const void *buf, int dwords); 597 void (*configure)(struct iwl_trans *trans, 598 const struct iwl_trans_config *trans_cfg); 599 void (*set_pmi)(struct iwl_trans *trans, bool state); 600 void (*sw_reset)(struct iwl_trans *trans); 601 bool (*grab_nic_access)(struct iwl_trans *trans, unsigned long *flags); 602 void (*release_nic_access)(struct iwl_trans *trans, 603 unsigned long *flags); 604 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask, 605 u32 value); 606 void (*ref)(struct iwl_trans *trans); 607 void (*unref)(struct iwl_trans *trans); 608 int (*suspend)(struct iwl_trans *trans); 609 void (*resume)(struct iwl_trans *trans); 610 611 struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans, 612 const struct iwl_fw_dbg_trigger_tlv 613 *trigger); 614 615 void (*dump_regs)(struct iwl_trans *trans); 616 }; 617 618 /** 619 * enum iwl_trans_state - state of the transport layer 620 * 621 * @IWL_TRANS_NO_FW: no fw has sent an alive response 622 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response 623 */ 624 enum iwl_trans_state { 625 IWL_TRANS_NO_FW = 0, 626 IWL_TRANS_FW_ALIVE = 1, 627 }; 628 629 /** 630 * DOC: Platform power management 631 * 632 * There are two types of platform power management: system-wide 633 * (WoWLAN) and runtime. 634 * 635 * In system-wide power management the entire platform goes into a low 636 * power state (e.g. idle or suspend to RAM) at the same time and the 637 * device is configured as a wakeup source for the entire platform. 638 * This is usually triggered by userspace activity (e.g. the user 639 * presses the suspend button or a power management daemon decides to 640 * put the platform in low power mode). The device's behavior in this 641 * mode is dictated by the wake-on-WLAN configuration. 642 * 643 * In runtime power management, only the devices which are themselves 644 * idle enter a low power state. This is done at runtime, which means 645 * that the entire system is still running normally. This mode is 646 * usually triggered automatically by the device driver and requires 647 * the ability to enter and exit the low power modes in a very short 648 * time, so there is not much impact in usability. 649 * 650 * The terms used for the device's behavior are as follows: 651 * 652 * - D0: the device is fully powered and the host is awake; 653 * - D3: the device is in low power mode and only reacts to 654 * specific events (e.g. magic-packet received or scan 655 * results found); 656 * - D0I3: the device is in low power mode and reacts to any 657 * activity (e.g. RX); 658 * 659 * These terms reflect the power modes in the firmware and are not to 660 * be confused with the physical device power state. The NIC can be 661 * in D0I3 mode even if, for instance, the PCI device is in D3 state. 662 */ 663 664 /** 665 * enum iwl_plat_pm_mode - platform power management mode 666 * 667 * This enumeration describes the device's platform power management 668 * behavior when in idle mode (i.e. runtime power management) or when 669 * in system-wide suspend (i.e WoWLAN). 670 * 671 * @IWL_PLAT_PM_MODE_DISABLED: power management is disabled for this 672 * device. At runtime, this means that nothing happens and the 673 * device always remains in active. In system-wide suspend mode, 674 * it means that the all connections will be closed automatically 675 * by mac80211 before the platform is suspended. 676 * @IWL_PLAT_PM_MODE_D3: the device goes into D3 mode (i.e. WoWLAN). 677 * For runtime power management, this mode is not officially 678 * supported. 679 * @IWL_PLAT_PM_MODE_D0I3: the device goes into D0I3 mode. 680 */ 681 enum iwl_plat_pm_mode { 682 IWL_PLAT_PM_MODE_DISABLED, 683 IWL_PLAT_PM_MODE_D3, 684 IWL_PLAT_PM_MODE_D0I3, 685 }; 686 687 /* Max time to wait for trans to become idle/non-idle on d0i3 688 * enter/exit (in msecs). 689 */ 690 #define IWL_TRANS_IDLE_TIMEOUT 2000 691 692 /** 693 * struct iwl_trans - transport common data 694 * 695 * @ops - pointer to iwl_trans_ops 696 * @op_mode - pointer to the op_mode 697 * @cfg - pointer to the configuration 698 * @drv - pointer to iwl_drv 699 * @status: a bit-mask of transport status flags 700 * @dev - pointer to struct device * that represents the device 701 * @max_skb_frags: maximum number of fragments an SKB can have when transmitted. 702 * 0 indicates that frag SKBs (NETIF_F_SG) aren't supported. 703 * @hw_rf_id a u32 with the device RF ID 704 * @hw_id: a u32 with the ID of the device / sub-device. 705 * Set during transport allocation. 706 * @hw_id_str: a string with info about HW ID. Set during transport allocation. 707 * @pm_support: set to true in start_hw if link pm is supported 708 * @ltr_enabled: set to true if the LTR is enabled 709 * @wide_cmd_header: true when ucode supports wide command header format 710 * @num_rx_queues: number of RX queues allocated by the transport; 711 * the transport must set this before calling iwl_drv_start() 712 * @iml_len: the length of the image loader 713 * @iml: a pointer to the image loader itself 714 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only. 715 * The user should use iwl_trans_{alloc,free}_tx_cmd. 716 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before 717 * starting the firmware, used for tracing 718 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the 719 * start of the 802.11 header in the @rx_mpdu_cmd 720 * @dflt_pwr_limit: default power limit fetched from the platform (ACPI) 721 * @dbg_dest_tlv: points to the destination TLV for debug 722 * @dbg_conf_tlv: array of pointers to configuration TLVs for debug 723 * @dbg_trigger_tlv: array of pointers to triggers TLVs for debug 724 * @dbg_dest_reg_num: num of reg_ops in %dbg_dest_tlv 725 * @system_pm_mode: the system-wide power management mode in use. 726 * This mode is set dynamically, depending on the WoWLAN values 727 * configured from the userspace at runtime. 728 * @runtime_pm_mode: the runtime power management mode in use. This 729 * mode is set during the initialization phase and is not 730 * supposed to change during runtime. 731 */ 732 struct iwl_trans { 733 const struct iwl_trans_ops *ops; 734 struct iwl_op_mode *op_mode; 735 const struct iwl_cfg *cfg; 736 struct iwl_drv *drv; 737 enum iwl_trans_state state; 738 unsigned long status; 739 740 struct device *dev; 741 u32 max_skb_frags; 742 u32 hw_rev; 743 u32 hw_rf_id; 744 u32 hw_id; 745 char hw_id_str[52]; 746 747 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size; 748 749 bool pm_support; 750 bool ltr_enabled; 751 752 const struct iwl_hcmd_arr *command_groups; 753 int command_groups_size; 754 bool wide_cmd_header; 755 756 u8 num_rx_queues; 757 758 size_t iml_len; 759 u8 *iml; 760 761 /* The following fields are internal only */ 762 struct kmem_cache *dev_cmd_pool; 763 char dev_cmd_pool_name[50]; 764 765 struct dentry *dbgfs_dir; 766 767 #ifdef CONFIG_LOCKDEP 768 struct lockdep_map sync_cmd_lockdep_map; 769 #endif 770 771 const struct iwl_fw_dbg_dest_tlv_v1 *dbg_dest_tlv; 772 const struct iwl_fw_dbg_conf_tlv *dbg_conf_tlv[FW_DBG_CONF_MAX]; 773 struct iwl_fw_dbg_trigger_tlv * const *dbg_trigger_tlv; 774 u32 dbg_dump_mask; 775 u8 dbg_dest_reg_num; 776 777 enum iwl_plat_pm_mode system_pm_mode; 778 enum iwl_plat_pm_mode runtime_pm_mode; 779 bool suspending; 780 781 /* pointer to trans specific struct */ 782 /*Ensure that this pointer will always be aligned to sizeof pointer */ 783 char trans_specific[0] __aligned(sizeof(void *)); 784 }; 785 786 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id); 787 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans); 788 789 static inline void iwl_trans_configure(struct iwl_trans *trans, 790 const struct iwl_trans_config *trans_cfg) 791 { 792 trans->op_mode = trans_cfg->op_mode; 793 794 trans->ops->configure(trans, trans_cfg); 795 WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg)); 796 } 797 798 static inline int _iwl_trans_start_hw(struct iwl_trans *trans, bool low_power) 799 { 800 might_sleep(); 801 802 return trans->ops->start_hw(trans, low_power); 803 } 804 805 static inline int iwl_trans_start_hw(struct iwl_trans *trans) 806 { 807 return trans->ops->start_hw(trans, true); 808 } 809 810 static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans) 811 { 812 might_sleep(); 813 814 if (trans->ops->op_mode_leave) 815 trans->ops->op_mode_leave(trans); 816 817 trans->op_mode = NULL; 818 819 trans->state = IWL_TRANS_NO_FW; 820 } 821 822 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr) 823 { 824 might_sleep(); 825 826 trans->state = IWL_TRANS_FW_ALIVE; 827 828 trans->ops->fw_alive(trans, scd_addr); 829 } 830 831 static inline int iwl_trans_start_fw(struct iwl_trans *trans, 832 const struct fw_img *fw, 833 bool run_in_rfkill) 834 { 835 might_sleep(); 836 837 WARN_ON_ONCE(!trans->rx_mpdu_cmd); 838 839 clear_bit(STATUS_FW_ERROR, &trans->status); 840 return trans->ops->start_fw(trans, fw, run_in_rfkill); 841 } 842 843 static inline void _iwl_trans_stop_device(struct iwl_trans *trans, 844 bool low_power) 845 { 846 might_sleep(); 847 848 trans->ops->stop_device(trans, low_power); 849 850 trans->state = IWL_TRANS_NO_FW; 851 } 852 853 static inline void iwl_trans_stop_device(struct iwl_trans *trans) 854 { 855 _iwl_trans_stop_device(trans, true); 856 } 857 858 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test, 859 bool reset) 860 { 861 might_sleep(); 862 if (trans->ops->d3_suspend) 863 trans->ops->d3_suspend(trans, test, reset); 864 } 865 866 static inline int iwl_trans_d3_resume(struct iwl_trans *trans, 867 enum iwl_d3_status *status, 868 bool test, bool reset) 869 { 870 might_sleep(); 871 if (!trans->ops->d3_resume) 872 return 0; 873 874 return trans->ops->d3_resume(trans, status, test, reset); 875 } 876 877 static inline int iwl_trans_suspend(struct iwl_trans *trans) 878 { 879 if (!trans->ops->suspend) 880 return 0; 881 882 return trans->ops->suspend(trans); 883 } 884 885 static inline void iwl_trans_resume(struct iwl_trans *trans) 886 { 887 if (trans->ops->resume) 888 trans->ops->resume(trans); 889 } 890 891 static inline struct iwl_trans_dump_data * 892 iwl_trans_dump_data(struct iwl_trans *trans, 893 const struct iwl_fw_dbg_trigger_tlv *trigger) 894 { 895 if (!trans->ops->dump_data) 896 return NULL; 897 return trans->ops->dump_data(trans, trigger); 898 } 899 900 static inline void iwl_trans_dump_regs(struct iwl_trans *trans) 901 { 902 if (trans->ops->dump_regs) 903 trans->ops->dump_regs(trans); 904 } 905 906 static inline struct iwl_device_cmd * 907 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans) 908 { 909 return kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC); 910 } 911 912 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd); 913 914 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans, 915 struct iwl_device_cmd *dev_cmd) 916 { 917 kmem_cache_free(trans->dev_cmd_pool, dev_cmd); 918 } 919 920 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, 921 struct iwl_device_cmd *dev_cmd, int queue) 922 { 923 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) 924 return -EIO; 925 926 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 927 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 928 return -EIO; 929 } 930 931 return trans->ops->tx(trans, skb, dev_cmd, queue); 932 } 933 934 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue, 935 int ssn, struct sk_buff_head *skbs) 936 { 937 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 938 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 939 return; 940 } 941 942 trans->ops->reclaim(trans, queue, ssn, skbs); 943 } 944 945 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue, 946 bool configure_scd) 947 { 948 trans->ops->txq_disable(trans, queue, configure_scd); 949 } 950 951 static inline bool 952 iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn, 953 const struct iwl_trans_txq_scd_cfg *cfg, 954 unsigned int queue_wdg_timeout) 955 { 956 might_sleep(); 957 958 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 959 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 960 return false; 961 } 962 963 return trans->ops->txq_enable(trans, queue, ssn, 964 cfg, queue_wdg_timeout); 965 } 966 967 static inline int 968 iwl_trans_get_rxq_dma_data(struct iwl_trans *trans, int queue, 969 struct iwl_trans_rxq_dma_data *data) 970 { 971 if (WARN_ON_ONCE(!trans->ops->rxq_dma_data)) 972 return -ENOTSUPP; 973 974 return trans->ops->rxq_dma_data(trans, queue, data); 975 } 976 977 static inline void 978 iwl_trans_txq_free(struct iwl_trans *trans, int queue) 979 { 980 if (WARN_ON_ONCE(!trans->ops->txq_free)) 981 return; 982 983 trans->ops->txq_free(trans, queue); 984 } 985 986 static inline int 987 iwl_trans_txq_alloc(struct iwl_trans *trans, 988 struct iwl_tx_queue_cfg_cmd *cmd, 989 int cmd_id, int size, 990 unsigned int wdg_timeout) 991 { 992 might_sleep(); 993 994 if (WARN_ON_ONCE(!trans->ops->txq_alloc)) 995 return -ENOTSUPP; 996 997 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 998 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 999 return -EIO; 1000 } 1001 1002 return trans->ops->txq_alloc(trans, cmd, cmd_id, size, wdg_timeout); 1003 } 1004 1005 static inline void iwl_trans_txq_set_shared_mode(struct iwl_trans *trans, 1006 int queue, bool shared_mode) 1007 { 1008 if (trans->ops->txq_set_shared_mode) 1009 trans->ops->txq_set_shared_mode(trans, queue, shared_mode); 1010 } 1011 1012 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue, 1013 int fifo, int sta_id, int tid, 1014 int frame_limit, u16 ssn, 1015 unsigned int queue_wdg_timeout) 1016 { 1017 struct iwl_trans_txq_scd_cfg cfg = { 1018 .fifo = fifo, 1019 .sta_id = sta_id, 1020 .tid = tid, 1021 .frame_limit = frame_limit, 1022 .aggregate = sta_id >= 0, 1023 }; 1024 1025 iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout); 1026 } 1027 1028 static inline 1029 void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo, 1030 unsigned int queue_wdg_timeout) 1031 { 1032 struct iwl_trans_txq_scd_cfg cfg = { 1033 .fifo = fifo, 1034 .sta_id = -1, 1035 .tid = IWL_MAX_TID_COUNT, 1036 .frame_limit = IWL_FRAME_LIMIT, 1037 .aggregate = false, 1038 }; 1039 1040 iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout); 1041 } 1042 1043 static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans, 1044 unsigned long txqs, 1045 bool freeze) 1046 { 1047 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1048 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1049 return; 1050 } 1051 1052 if (trans->ops->freeze_txq_timer) 1053 trans->ops->freeze_txq_timer(trans, txqs, freeze); 1054 } 1055 1056 static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans, 1057 bool block) 1058 { 1059 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1060 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1061 return; 1062 } 1063 1064 if (trans->ops->block_txq_ptrs) 1065 trans->ops->block_txq_ptrs(trans, block); 1066 } 1067 1068 static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans, 1069 u32 txqs) 1070 { 1071 if (WARN_ON_ONCE(!trans->ops->wait_tx_queues_empty)) 1072 return -ENOTSUPP; 1073 1074 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1075 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1076 return -EIO; 1077 } 1078 1079 return trans->ops->wait_tx_queues_empty(trans, txqs); 1080 } 1081 1082 static inline int iwl_trans_wait_txq_empty(struct iwl_trans *trans, int queue) 1083 { 1084 if (WARN_ON_ONCE(!trans->ops->wait_txq_empty)) 1085 return -ENOTSUPP; 1086 1087 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { 1088 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 1089 return -EIO; 1090 } 1091 1092 return trans->ops->wait_txq_empty(trans, queue); 1093 } 1094 1095 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val) 1096 { 1097 trans->ops->write8(trans, ofs, val); 1098 } 1099 1100 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val) 1101 { 1102 trans->ops->write32(trans, ofs, val); 1103 } 1104 1105 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs) 1106 { 1107 return trans->ops->read32(trans, ofs); 1108 } 1109 1110 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs) 1111 { 1112 return trans->ops->read_prph(trans, ofs); 1113 } 1114 1115 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs, 1116 u32 val) 1117 { 1118 return trans->ops->write_prph(trans, ofs, val); 1119 } 1120 1121 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr, 1122 void *buf, int dwords) 1123 { 1124 return trans->ops->read_mem(trans, addr, buf, dwords); 1125 } 1126 1127 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \ 1128 do { \ 1129 if (__builtin_constant_p(bufsize)) \ 1130 BUILD_BUG_ON((bufsize) % sizeof(u32)); \ 1131 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\ 1132 } while (0) 1133 1134 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr) 1135 { 1136 u32 value; 1137 1138 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1))) 1139 return 0xa5a5a5a5; 1140 1141 return value; 1142 } 1143 1144 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr, 1145 const void *buf, int dwords) 1146 { 1147 return trans->ops->write_mem(trans, addr, buf, dwords); 1148 } 1149 1150 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr, 1151 u32 val) 1152 { 1153 return iwl_trans_write_mem(trans, addr, &val, 1); 1154 } 1155 1156 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state) 1157 { 1158 if (trans->ops->set_pmi) 1159 trans->ops->set_pmi(trans, state); 1160 } 1161 1162 static inline void iwl_trans_sw_reset(struct iwl_trans *trans) 1163 { 1164 if (trans->ops->sw_reset) 1165 trans->ops->sw_reset(trans); 1166 } 1167 1168 static inline void 1169 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value) 1170 { 1171 trans->ops->set_bits_mask(trans, reg, mask, value); 1172 } 1173 1174 #define iwl_trans_grab_nic_access(trans, flags) \ 1175 __cond_lock(nic_access, \ 1176 likely((trans)->ops->grab_nic_access(trans, flags))) 1177 1178 static inline void __releases(nic_access) 1179 iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags) 1180 { 1181 trans->ops->release_nic_access(trans, flags); 1182 __release(nic_access); 1183 } 1184 1185 static inline void iwl_trans_fw_error(struct iwl_trans *trans) 1186 { 1187 if (WARN_ON_ONCE(!trans->op_mode)) 1188 return; 1189 1190 /* prevent double restarts due to the same erroneous FW */ 1191 if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status)) 1192 iwl_op_mode_nic_error(trans->op_mode); 1193 } 1194 1195 /***************************************************** 1196 * transport helper functions 1197 *****************************************************/ 1198 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size, 1199 struct device *dev, 1200 const struct iwl_cfg *cfg, 1201 const struct iwl_trans_ops *ops); 1202 void iwl_trans_free(struct iwl_trans *trans); 1203 void iwl_trans_ref(struct iwl_trans *trans); 1204 void iwl_trans_unref(struct iwl_trans *trans); 1205 1206 /***************************************************** 1207 * driver (transport) register/unregister functions 1208 ******************************************************/ 1209 int __must_check iwl_pci_register_driver(void); 1210 void iwl_pci_unregister_driver(void); 1211 1212 #endif /* __iwl_trans_h__ */ 1213