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
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30 * Intel Linux Wireless <linuxwifi@intel.com>
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34 *
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36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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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
iwl_rx_packet_len(const struct iwl_rx_packet * pkt)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
iwl_rx_packet_payload_len(const struct iwl_rx_packet * pkt)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
iwl_free_resp(struct iwl_host_cmd * cmd)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 u8 status;
273 };
274
rxb_addr(struct iwl_rx_cmd_buffer * r)275 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
276 {
277 return (void *)((unsigned long)page_address(r->_page) + r->_offset);
278 }
279
rxb_offset(struct iwl_rx_cmd_buffer * r)280 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
281 {
282 return r->_offset;
283 }
284
rxb_steal_page(struct iwl_rx_cmd_buffer * r)285 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
286 {
287 r->_page_stolen = true;
288 get_page(r->_page);
289 return r->_page;
290 }
291
iwl_free_rxb(struct iwl_rx_cmd_buffer * r)292 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
293 {
294 __free_pages(r->_page, r->_rx_page_order);
295 }
296
297 #define MAX_NO_RECLAIM_CMDS 6
298
299 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
300
301 /*
302 * Maximum number of HW queues the transport layer
303 * currently supports
304 */
305 #define IWL_MAX_HW_QUEUES 32
306 #define IWL_MAX_TVQM_QUEUES 512
307
308 #define IWL_MAX_TID_COUNT 8
309 #define IWL_MGMT_TID 15
310 #define IWL_FRAME_LIMIT 64
311 #define IWL_MAX_RX_HW_QUEUES 16
312
313 /**
314 * enum iwl_wowlan_status - WoWLAN image/device status
315 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
316 * @IWL_D3_STATUS_RESET: device was reset while suspended
317 */
318 enum iwl_d3_status {
319 IWL_D3_STATUS_ALIVE,
320 IWL_D3_STATUS_RESET,
321 };
322
323 /**
324 * enum iwl_trans_status: transport status flags
325 * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed
326 * @STATUS_DEVICE_ENABLED: APM is enabled
327 * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up)
328 * @STATUS_INT_ENABLED: interrupts are enabled
329 * @STATUS_RFKILL_HW: the actual HW state of the RF-kill switch
330 * @STATUS_RFKILL_OPMODE: RF-kill state reported to opmode
331 * @STATUS_FW_ERROR: the fw is in error state
332 * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands
333 * are sent
334 * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent
335 * @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation
336 */
337 enum iwl_trans_status {
338 STATUS_SYNC_HCMD_ACTIVE,
339 STATUS_DEVICE_ENABLED,
340 STATUS_TPOWER_PMI,
341 STATUS_INT_ENABLED,
342 STATUS_RFKILL_HW,
343 STATUS_RFKILL_OPMODE,
344 STATUS_FW_ERROR,
345 STATUS_TRANS_GOING_IDLE,
346 STATUS_TRANS_IDLE,
347 STATUS_TRANS_DEAD,
348 };
349
350 static inline int
iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)351 iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)
352 {
353 switch (rb_size) {
354 case IWL_AMSDU_2K:
355 return get_order(2 * 1024);
356 case IWL_AMSDU_4K:
357 return get_order(4 * 1024);
358 case IWL_AMSDU_8K:
359 return get_order(8 * 1024);
360 case IWL_AMSDU_12K:
361 return get_order(12 * 1024);
362 default:
363 WARN_ON(1);
364 return -1;
365 }
366 }
367
368 struct iwl_hcmd_names {
369 u8 cmd_id;
370 const char *const cmd_name;
371 };
372
373 #define HCMD_NAME(x) \
374 { .cmd_id = x, .cmd_name = #x }
375
376 struct iwl_hcmd_arr {
377 const struct iwl_hcmd_names *arr;
378 int size;
379 };
380
381 #define HCMD_ARR(x) \
382 { .arr = x, .size = ARRAY_SIZE(x) }
383
384 /**
385 * struct iwl_trans_config - transport configuration
386 *
387 * @op_mode: pointer to the upper layer.
388 * @cmd_queue: the index of the command queue.
389 * Must be set before start_fw.
390 * @cmd_fifo: the fifo for host commands
391 * @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue.
392 * @no_reclaim_cmds: Some devices erroneously don't set the
393 * SEQ_RX_FRAME bit on some notifications, this is the
394 * list of such notifications to filter. Max length is
395 * %MAX_NO_RECLAIM_CMDS.
396 * @n_no_reclaim_cmds: # of commands in list
397 * @rx_buf_size: RX buffer size needed for A-MSDUs
398 * if unset 4k will be the RX buffer size
399 * @bc_table_dword: set to true if the BC table expects the byte count to be
400 * in DWORD (as opposed to bytes)
401 * @scd_set_active: should the transport configure the SCD for HCMD queue
402 * @sw_csum_tx: transport should compute the TCP checksum
403 * @command_groups: array of command groups, each member is an array of the
404 * commands in the group; for debugging only
405 * @command_groups_size: number of command groups, to avoid illegal access
406 * @cb_data_offs: offset inside skb->cb to store transport data at, must have
407 * space for at least two pointers
408 */
409 struct iwl_trans_config {
410 struct iwl_op_mode *op_mode;
411
412 u8 cmd_queue;
413 u8 cmd_fifo;
414 unsigned int cmd_q_wdg_timeout;
415 const u8 *no_reclaim_cmds;
416 unsigned int n_no_reclaim_cmds;
417
418 enum iwl_amsdu_size rx_buf_size;
419 bool bc_table_dword;
420 bool scd_set_active;
421 bool sw_csum_tx;
422 const struct iwl_hcmd_arr *command_groups;
423 int command_groups_size;
424
425 u8 cb_data_offs;
426 };
427
428 struct iwl_trans_dump_data {
429 u32 len;
430 u8 data[];
431 };
432
433 struct iwl_trans;
434
435 struct iwl_trans_txq_scd_cfg {
436 u8 fifo;
437 u8 sta_id;
438 u8 tid;
439 bool aggregate;
440 int frame_limit;
441 };
442
443 /**
444 * struct iwl_trans_rxq_dma_data - RX queue DMA data
445 * @fr_bd_cb: DMA address of free BD cyclic buffer
446 * @fr_bd_wid: Initial write index of the free BD cyclic buffer
447 * @urbd_stts_wrptr: DMA address of urbd_stts_wrptr
448 * @ur_bd_cb: DMA address of used BD cyclic buffer
449 */
450 struct iwl_trans_rxq_dma_data {
451 u64 fr_bd_cb;
452 u32 fr_bd_wid;
453 u64 urbd_stts_wrptr;
454 u64 ur_bd_cb;
455 };
456
457 /**
458 * struct iwl_trans_ops - transport specific operations
459 *
460 * All the handlers MUST be implemented
461 *
462 * @start_hw: starts the HW. If low_power is true, the NIC needs to be taken
463 * out of a low power state. From that point on, the HW can send
464 * interrupts. May sleep.
465 * @op_mode_leave: Turn off the HW RF kill indication if on
466 * May sleep
467 * @start_fw: allocates and inits all the resources for the transport
468 * layer. Also kick a fw image.
469 * May sleep
470 * @fw_alive: called when the fw sends alive notification. If the fw provides
471 * the SCD base address in SRAM, then provide it here, or 0 otherwise.
472 * May sleep
473 * @stop_device: stops the whole device (embedded CPU put to reset) and stops
474 * the HW. If low_power is true, the NIC will be put in low power state.
475 * From that point on, the HW will be stopped but will still issue an
476 * interrupt if the HW RF kill switch is triggered.
477 * This callback must do the right thing and not crash even if %start_hw()
478 * was called but not &start_fw(). May sleep.
479 * @d3_suspend: put the device into the correct mode for WoWLAN during
480 * suspend. This is optional, if not implemented WoWLAN will not be
481 * supported. This callback may sleep.
482 * @d3_resume: resume the device after WoWLAN, enabling the opmode to
483 * talk to the WoWLAN image to get its status. This is optional, if not
484 * implemented WoWLAN will not be supported. This callback may sleep.
485 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
486 * If RFkill is asserted in the middle of a SYNC host command, it must
487 * return -ERFKILL straight away.
488 * May sleep only if CMD_ASYNC is not set
489 * @tx: send an skb. The transport relies on the op_mode to zero the
490 * the ieee80211_tx_info->driver_data. If the MPDU is an A-MSDU, all
491 * the CSUM will be taken care of (TCP CSUM and IP header in case of
492 * IPv4). If the MPDU is a single MSDU, the op_mode must compute the IP
493 * header if it is IPv4.
494 * Must be atomic
495 * @reclaim: free packet until ssn. Returns a list of freed packets.
496 * Must be atomic
497 * @txq_enable: setup a queue. To setup an AC queue, use the
498 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
499 * this one. The op_mode must not configure the HCMD queue. The scheduler
500 * configuration may be %NULL, in which case the hardware will not be
501 * configured. If true is returned, the operation mode needs to increment
502 * the sequence number of the packets routed to this queue because of a
503 * hardware scheduler bug. May sleep.
504 * @txq_disable: de-configure a Tx queue to send AMPDUs
505 * Must be atomic
506 * @txq_set_shared_mode: change Tx queue shared/unshared marking
507 * @wait_tx_queues_empty: wait until tx queues are empty. May sleep.
508 * @wait_txq_empty: wait until specific tx queue is empty. May sleep.
509 * @freeze_txq_timer: prevents the timer of the queue from firing until the
510 * queue is set to awake. Must be atomic.
511 * @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note
512 * that the transport needs to refcount the calls since this function
513 * will be called several times with block = true, and then the queues
514 * need to be unblocked only after the same number of calls with
515 * block = false.
516 * @write8: write a u8 to a register at offset ofs from the BAR
517 * @write32: write a u32 to a register at offset ofs from the BAR
518 * @read32: read a u32 register at offset ofs from the BAR
519 * @read_prph: read a DWORD from a periphery register
520 * @write_prph: write a DWORD to a periphery register
521 * @read_mem: read device's SRAM in DWORD
522 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
523 * will be zeroed.
524 * @configure: configure parameters required by the transport layer from
525 * the op_mode. May be called several times before start_fw, can't be
526 * called after that.
527 * @set_pmi: set the power pmi state
528 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs.
529 * Sleeping is not allowed between grab_nic_access and
530 * release_nic_access.
531 * @release_nic_access: let the NIC go to sleep. The "flags" parameter
532 * must be the same one that was sent before to the grab_nic_access.
533 * @set_bits_mask - set SRAM register according to value and mask.
534 * @ref: grab a reference to the transport/FW layers, disallowing
535 * certain low power states
536 * @unref: release a reference previously taken with @ref. Note that
537 * initially the reference count is 1, making an initial @unref
538 * necessary to allow low power states.
539 * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last
540 * TX'ed commands and similar. The buffer will be vfree'd by the caller.
541 * Note that the transport must fill in the proper file headers.
542 * @dump_regs: dump using IWL_ERR configuration space and memory mapped
543 * registers of the device to diagnose failure, e.g., when HW becomes
544 * inaccessible.
545 */
546 struct iwl_trans_ops {
547
548 int (*start_hw)(struct iwl_trans *iwl_trans, bool low_power);
549 void (*op_mode_leave)(struct iwl_trans *iwl_trans);
550 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
551 bool run_in_rfkill);
552 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
553 void (*stop_device)(struct iwl_trans *trans, bool low_power);
554
555 void (*d3_suspend)(struct iwl_trans *trans, bool test, bool reset);
556 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status,
557 bool test, bool reset);
558
559 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
560
561 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
562 struct iwl_device_cmd *dev_cmd, int queue);
563 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
564 struct sk_buff_head *skbs);
565
566 bool (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
567 const struct iwl_trans_txq_scd_cfg *cfg,
568 unsigned int queue_wdg_timeout);
569 void (*txq_disable)(struct iwl_trans *trans, int queue,
570 bool configure_scd);
571 /* 22000 functions */
572 int (*txq_alloc)(struct iwl_trans *trans,
573 struct iwl_tx_queue_cfg_cmd *cmd,
574 int cmd_id, int size,
575 unsigned int queue_wdg_timeout);
576 void (*txq_free)(struct iwl_trans *trans, int queue);
577 int (*rxq_dma_data)(struct iwl_trans *trans, int queue,
578 struct iwl_trans_rxq_dma_data *data);
579
580 void (*txq_set_shared_mode)(struct iwl_trans *trans, u32 txq_id,
581 bool shared);
582
583 int (*wait_tx_queues_empty)(struct iwl_trans *trans, u32 txq_bm);
584 int (*wait_txq_empty)(struct iwl_trans *trans, int queue);
585 void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs,
586 bool freeze);
587 void (*block_txq_ptrs)(struct iwl_trans *trans, bool block);
588
589 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
590 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
591 u32 (*read32)(struct iwl_trans *trans, u32 ofs);
592 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
593 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
594 int (*read_mem)(struct iwl_trans *trans, u32 addr,
595 void *buf, int dwords);
596 int (*write_mem)(struct iwl_trans *trans, u32 addr,
597 const void *buf, int dwords);
598 void (*configure)(struct iwl_trans *trans,
599 const struct iwl_trans_config *trans_cfg);
600 void (*set_pmi)(struct iwl_trans *trans, bool state);
601 void (*sw_reset)(struct iwl_trans *trans);
602 bool (*grab_nic_access)(struct iwl_trans *trans, unsigned long *flags);
603 void (*release_nic_access)(struct iwl_trans *trans,
604 unsigned long *flags);
605 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
606 u32 value);
607 void (*ref)(struct iwl_trans *trans);
608 void (*unref)(struct iwl_trans *trans);
609 int (*suspend)(struct iwl_trans *trans);
610 void (*resume)(struct iwl_trans *trans);
611
612 struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans,
613 const struct iwl_fw_dbg_trigger_tlv
614 *trigger);
615
616 void (*dump_regs)(struct iwl_trans *trans);
617 };
618
619 /**
620 * enum iwl_trans_state - state of the transport layer
621 *
622 * @IWL_TRANS_NO_FW: no fw has sent an alive response
623 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
624 */
625 enum iwl_trans_state {
626 IWL_TRANS_NO_FW = 0,
627 IWL_TRANS_FW_ALIVE = 1,
628 };
629
630 /**
631 * DOC: Platform power management
632 *
633 * There are two types of platform power management: system-wide
634 * (WoWLAN) and runtime.
635 *
636 * In system-wide power management the entire platform goes into a low
637 * power state (e.g. idle or suspend to RAM) at the same time and the
638 * device is configured as a wakeup source for the entire platform.
639 * This is usually triggered by userspace activity (e.g. the user
640 * presses the suspend button or a power management daemon decides to
641 * put the platform in low power mode). The device's behavior in this
642 * mode is dictated by the wake-on-WLAN configuration.
643 *
644 * In runtime power management, only the devices which are themselves
645 * idle enter a low power state. This is done at runtime, which means
646 * that the entire system is still running normally. This mode is
647 * usually triggered automatically by the device driver and requires
648 * the ability to enter and exit the low power modes in a very short
649 * time, so there is not much impact in usability.
650 *
651 * The terms used for the device's behavior are as follows:
652 *
653 * - D0: the device is fully powered and the host is awake;
654 * - D3: the device is in low power mode and only reacts to
655 * specific events (e.g. magic-packet received or scan
656 * results found);
657 * - D0I3: the device is in low power mode and reacts to any
658 * activity (e.g. RX);
659 *
660 * These terms reflect the power modes in the firmware and are not to
661 * be confused with the physical device power state. The NIC can be
662 * in D0I3 mode even if, for instance, the PCI device is in D3 state.
663 */
664
665 /**
666 * enum iwl_plat_pm_mode - platform power management mode
667 *
668 * This enumeration describes the device's platform power management
669 * behavior when in idle mode (i.e. runtime power management) or when
670 * in system-wide suspend (i.e WoWLAN).
671 *
672 * @IWL_PLAT_PM_MODE_DISABLED: power management is disabled for this
673 * device. At runtime, this means that nothing happens and the
674 * device always remains in active. In system-wide suspend mode,
675 * it means that the all connections will be closed automatically
676 * by mac80211 before the platform is suspended.
677 * @IWL_PLAT_PM_MODE_D3: the device goes into D3 mode (i.e. WoWLAN).
678 * For runtime power management, this mode is not officially
679 * supported.
680 * @IWL_PLAT_PM_MODE_D0I3: the device goes into D0I3 mode.
681 */
682 enum iwl_plat_pm_mode {
683 IWL_PLAT_PM_MODE_DISABLED,
684 IWL_PLAT_PM_MODE_D3,
685 IWL_PLAT_PM_MODE_D0I3,
686 };
687
688 /* Max time to wait for trans to become idle/non-idle on d0i3
689 * enter/exit (in msecs).
690 */
691 #define IWL_TRANS_IDLE_TIMEOUT 2000
692
693 /**
694 * struct iwl_trans - transport common data
695 *
696 * @ops - pointer to iwl_trans_ops
697 * @op_mode - pointer to the op_mode
698 * @cfg - pointer to the configuration
699 * @drv - pointer to iwl_drv
700 * @status: a bit-mask of transport status flags
701 * @dev - pointer to struct device * that represents the device
702 * @max_skb_frags: maximum number of fragments an SKB can have when transmitted.
703 * 0 indicates that frag SKBs (NETIF_F_SG) aren't supported.
704 * @hw_rf_id a u32 with the device RF ID
705 * @hw_id: a u32 with the ID of the device / sub-device.
706 * Set during transport allocation.
707 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
708 * @pm_support: set to true in start_hw if link pm is supported
709 * @ltr_enabled: set to true if the LTR is enabled
710 * @wide_cmd_header: true when ucode supports wide command header format
711 * @num_rx_queues: number of RX queues allocated by the transport;
712 * the transport must set this before calling iwl_drv_start()
713 * @iml_len: the length of the image loader
714 * @iml: a pointer to the image loader itself
715 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
716 * The user should use iwl_trans_{alloc,free}_tx_cmd.
717 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
718 * starting the firmware, used for tracing
719 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
720 * start of the 802.11 header in the @rx_mpdu_cmd
721 * @dflt_pwr_limit: default power limit fetched from the platform (ACPI)
722 * @dbg_dest_tlv: points to the destination TLV for debug
723 * @dbg_conf_tlv: array of pointers to configuration TLVs for debug
724 * @dbg_trigger_tlv: array of pointers to triggers TLVs for debug
725 * @dbg_dest_reg_num: num of reg_ops in %dbg_dest_tlv
726 * @system_pm_mode: the system-wide power management mode in use.
727 * This mode is set dynamically, depending on the WoWLAN values
728 * configured from the userspace at runtime.
729 * @runtime_pm_mode: the runtime power management mode in use. This
730 * mode is set during the initialization phase and is not
731 * supposed to change during runtime.
732 */
733 struct iwl_trans {
734 const struct iwl_trans_ops *ops;
735 struct iwl_op_mode *op_mode;
736 const struct iwl_cfg *cfg;
737 struct iwl_drv *drv;
738 enum iwl_trans_state state;
739 unsigned long status;
740
741 struct device *dev;
742 u32 max_skb_frags;
743 u32 hw_rev;
744 u32 hw_rf_id;
745 u32 hw_id;
746 char hw_id_str[52];
747
748 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
749
750 bool pm_support;
751 bool ltr_enabled;
752
753 const struct iwl_hcmd_arr *command_groups;
754 int command_groups_size;
755 bool wide_cmd_header;
756
757 u8 num_rx_queues;
758
759 size_t iml_len;
760 u8 *iml;
761
762 /* The following fields are internal only */
763 struct kmem_cache *dev_cmd_pool;
764 char dev_cmd_pool_name[50];
765
766 struct dentry *dbgfs_dir;
767
768 #ifdef CONFIG_LOCKDEP
769 struct lockdep_map sync_cmd_lockdep_map;
770 #endif
771
772 const struct iwl_fw_dbg_dest_tlv_v1 *dbg_dest_tlv;
773 const struct iwl_fw_dbg_conf_tlv *dbg_conf_tlv[FW_DBG_CONF_MAX];
774 struct iwl_fw_dbg_trigger_tlv * const *dbg_trigger_tlv;
775 u32 dbg_dump_mask;
776 u8 dbg_dest_reg_num;
777
778 enum iwl_plat_pm_mode system_pm_mode;
779 enum iwl_plat_pm_mode runtime_pm_mode;
780 bool suspending;
781
782 /* pointer to trans specific struct */
783 /*Ensure that this pointer will always be aligned to sizeof pointer */
784 char trans_specific[0] __aligned(sizeof(void *));
785 };
786
787 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id);
788 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans);
789
iwl_trans_configure(struct iwl_trans * trans,const struct iwl_trans_config * trans_cfg)790 static inline void iwl_trans_configure(struct iwl_trans *trans,
791 const struct iwl_trans_config *trans_cfg)
792 {
793 trans->op_mode = trans_cfg->op_mode;
794
795 trans->ops->configure(trans, trans_cfg);
796 WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg));
797 }
798
_iwl_trans_start_hw(struct iwl_trans * trans,bool low_power)799 static inline int _iwl_trans_start_hw(struct iwl_trans *trans, bool low_power)
800 {
801 might_sleep();
802
803 return trans->ops->start_hw(trans, low_power);
804 }
805
iwl_trans_start_hw(struct iwl_trans * trans)806 static inline int iwl_trans_start_hw(struct iwl_trans *trans)
807 {
808 return trans->ops->start_hw(trans, true);
809 }
810
iwl_trans_op_mode_leave(struct iwl_trans * trans)811 static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans)
812 {
813 might_sleep();
814
815 if (trans->ops->op_mode_leave)
816 trans->ops->op_mode_leave(trans);
817
818 trans->op_mode = NULL;
819
820 trans->state = IWL_TRANS_NO_FW;
821 }
822
iwl_trans_fw_alive(struct iwl_trans * trans,u32 scd_addr)823 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
824 {
825 might_sleep();
826
827 trans->state = IWL_TRANS_FW_ALIVE;
828
829 trans->ops->fw_alive(trans, scd_addr);
830 }
831
iwl_trans_start_fw(struct iwl_trans * trans,const struct fw_img * fw,bool run_in_rfkill)832 static inline int iwl_trans_start_fw(struct iwl_trans *trans,
833 const struct fw_img *fw,
834 bool run_in_rfkill)
835 {
836 might_sleep();
837
838 WARN_ON_ONCE(!trans->rx_mpdu_cmd);
839
840 clear_bit(STATUS_FW_ERROR, &trans->status);
841 return trans->ops->start_fw(trans, fw, run_in_rfkill);
842 }
843
_iwl_trans_stop_device(struct iwl_trans * trans,bool low_power)844 static inline void _iwl_trans_stop_device(struct iwl_trans *trans,
845 bool low_power)
846 {
847 might_sleep();
848
849 trans->ops->stop_device(trans, low_power);
850
851 trans->state = IWL_TRANS_NO_FW;
852 }
853
iwl_trans_stop_device(struct iwl_trans * trans)854 static inline void iwl_trans_stop_device(struct iwl_trans *trans)
855 {
856 _iwl_trans_stop_device(trans, true);
857 }
858
iwl_trans_d3_suspend(struct iwl_trans * trans,bool test,bool reset)859 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test,
860 bool reset)
861 {
862 might_sleep();
863 if (trans->ops->d3_suspend)
864 trans->ops->d3_suspend(trans, test, reset);
865 }
866
iwl_trans_d3_resume(struct iwl_trans * trans,enum iwl_d3_status * status,bool test,bool reset)867 static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
868 enum iwl_d3_status *status,
869 bool test, bool reset)
870 {
871 might_sleep();
872 if (!trans->ops->d3_resume)
873 return 0;
874
875 return trans->ops->d3_resume(trans, status, test, reset);
876 }
877
iwl_trans_suspend(struct iwl_trans * trans)878 static inline int iwl_trans_suspend(struct iwl_trans *trans)
879 {
880 if (!trans->ops->suspend)
881 return 0;
882
883 return trans->ops->suspend(trans);
884 }
885
iwl_trans_resume(struct iwl_trans * trans)886 static inline void iwl_trans_resume(struct iwl_trans *trans)
887 {
888 if (trans->ops->resume)
889 trans->ops->resume(trans);
890 }
891
892 static inline struct iwl_trans_dump_data *
iwl_trans_dump_data(struct iwl_trans * trans,const struct iwl_fw_dbg_trigger_tlv * trigger)893 iwl_trans_dump_data(struct iwl_trans *trans,
894 const struct iwl_fw_dbg_trigger_tlv *trigger)
895 {
896 if (!trans->ops->dump_data)
897 return NULL;
898 return trans->ops->dump_data(trans, trigger);
899 }
900
iwl_trans_dump_regs(struct iwl_trans * trans)901 static inline void iwl_trans_dump_regs(struct iwl_trans *trans)
902 {
903 if (trans->ops->dump_regs)
904 trans->ops->dump_regs(trans);
905 }
906
907 static inline struct iwl_device_cmd *
iwl_trans_alloc_tx_cmd(struct iwl_trans * trans)908 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
909 {
910 return kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);
911 }
912
913 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
914
iwl_trans_free_tx_cmd(struct iwl_trans * trans,struct iwl_device_cmd * dev_cmd)915 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
916 struct iwl_device_cmd *dev_cmd)
917 {
918 kmem_cache_free(trans->dev_cmd_pool, dev_cmd);
919 }
920
iwl_trans_tx(struct iwl_trans * trans,struct sk_buff * skb,struct iwl_device_cmd * dev_cmd,int queue)921 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
922 struct iwl_device_cmd *dev_cmd, int queue)
923 {
924 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
925 return -EIO;
926
927 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
928 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
929 return -EIO;
930 }
931
932 return trans->ops->tx(trans, skb, dev_cmd, queue);
933 }
934
iwl_trans_reclaim(struct iwl_trans * trans,int queue,int ssn,struct sk_buff_head * skbs)935 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
936 int ssn, struct sk_buff_head *skbs)
937 {
938 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
939 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
940 return;
941 }
942
943 trans->ops->reclaim(trans, queue, ssn, skbs);
944 }
945
iwl_trans_txq_disable(struct iwl_trans * trans,int queue,bool configure_scd)946 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
947 bool configure_scd)
948 {
949 trans->ops->txq_disable(trans, queue, configure_scd);
950 }
951
952 static inline bool
iwl_trans_txq_enable_cfg(struct iwl_trans * trans,int queue,u16 ssn,const struct iwl_trans_txq_scd_cfg * cfg,unsigned int queue_wdg_timeout)953 iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
954 const struct iwl_trans_txq_scd_cfg *cfg,
955 unsigned int queue_wdg_timeout)
956 {
957 might_sleep();
958
959 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
960 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
961 return false;
962 }
963
964 return trans->ops->txq_enable(trans, queue, ssn,
965 cfg, queue_wdg_timeout);
966 }
967
968 static inline int
iwl_trans_get_rxq_dma_data(struct iwl_trans * trans,int queue,struct iwl_trans_rxq_dma_data * data)969 iwl_trans_get_rxq_dma_data(struct iwl_trans *trans, int queue,
970 struct iwl_trans_rxq_dma_data *data)
971 {
972 if (WARN_ON_ONCE(!trans->ops->rxq_dma_data))
973 return -ENOTSUPP;
974
975 return trans->ops->rxq_dma_data(trans, queue, data);
976 }
977
978 static inline void
iwl_trans_txq_free(struct iwl_trans * trans,int queue)979 iwl_trans_txq_free(struct iwl_trans *trans, int queue)
980 {
981 if (WARN_ON_ONCE(!trans->ops->txq_free))
982 return;
983
984 trans->ops->txq_free(trans, queue);
985 }
986
987 static inline int
iwl_trans_txq_alloc(struct iwl_trans * trans,struct iwl_tx_queue_cfg_cmd * cmd,int cmd_id,int size,unsigned int wdg_timeout)988 iwl_trans_txq_alloc(struct iwl_trans *trans,
989 struct iwl_tx_queue_cfg_cmd *cmd,
990 int cmd_id, int size,
991 unsigned int wdg_timeout)
992 {
993 might_sleep();
994
995 if (WARN_ON_ONCE(!trans->ops->txq_alloc))
996 return -ENOTSUPP;
997
998 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
999 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1000 return -EIO;
1001 }
1002
1003 return trans->ops->txq_alloc(trans, cmd, cmd_id, size, wdg_timeout);
1004 }
1005
iwl_trans_txq_set_shared_mode(struct iwl_trans * trans,int queue,bool shared_mode)1006 static inline void iwl_trans_txq_set_shared_mode(struct iwl_trans *trans,
1007 int queue, bool shared_mode)
1008 {
1009 if (trans->ops->txq_set_shared_mode)
1010 trans->ops->txq_set_shared_mode(trans, queue, shared_mode);
1011 }
1012
iwl_trans_txq_enable(struct iwl_trans * trans,int queue,int fifo,int sta_id,int tid,int frame_limit,u16 ssn,unsigned int queue_wdg_timeout)1013 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
1014 int fifo, int sta_id, int tid,
1015 int frame_limit, u16 ssn,
1016 unsigned int queue_wdg_timeout)
1017 {
1018 struct iwl_trans_txq_scd_cfg cfg = {
1019 .fifo = fifo,
1020 .sta_id = sta_id,
1021 .tid = tid,
1022 .frame_limit = frame_limit,
1023 .aggregate = sta_id >= 0,
1024 };
1025
1026 iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout);
1027 }
1028
1029 static inline
iwl_trans_ac_txq_enable(struct iwl_trans * trans,int queue,int fifo,unsigned int queue_wdg_timeout)1030 void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo,
1031 unsigned int queue_wdg_timeout)
1032 {
1033 struct iwl_trans_txq_scd_cfg cfg = {
1034 .fifo = fifo,
1035 .sta_id = -1,
1036 .tid = IWL_MAX_TID_COUNT,
1037 .frame_limit = IWL_FRAME_LIMIT,
1038 .aggregate = false,
1039 };
1040
1041 iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout);
1042 }
1043
iwl_trans_freeze_txq_timer(struct iwl_trans * trans,unsigned long txqs,bool freeze)1044 static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans,
1045 unsigned long txqs,
1046 bool freeze)
1047 {
1048 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1049 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1050 return;
1051 }
1052
1053 if (trans->ops->freeze_txq_timer)
1054 trans->ops->freeze_txq_timer(trans, txqs, freeze);
1055 }
1056
iwl_trans_block_txq_ptrs(struct iwl_trans * trans,bool block)1057 static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans,
1058 bool block)
1059 {
1060 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1061 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1062 return;
1063 }
1064
1065 if (trans->ops->block_txq_ptrs)
1066 trans->ops->block_txq_ptrs(trans, block);
1067 }
1068
iwl_trans_wait_tx_queues_empty(struct iwl_trans * trans,u32 txqs)1069 static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans,
1070 u32 txqs)
1071 {
1072 if (WARN_ON_ONCE(!trans->ops->wait_tx_queues_empty))
1073 return -ENOTSUPP;
1074
1075 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1076 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1077 return -EIO;
1078 }
1079
1080 return trans->ops->wait_tx_queues_empty(trans, txqs);
1081 }
1082
iwl_trans_wait_txq_empty(struct iwl_trans * trans,int queue)1083 static inline int iwl_trans_wait_txq_empty(struct iwl_trans *trans, int queue)
1084 {
1085 if (WARN_ON_ONCE(!trans->ops->wait_txq_empty))
1086 return -ENOTSUPP;
1087
1088 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1089 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1090 return -EIO;
1091 }
1092
1093 return trans->ops->wait_txq_empty(trans, queue);
1094 }
1095
iwl_trans_write8(struct iwl_trans * trans,u32 ofs,u8 val)1096 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1097 {
1098 trans->ops->write8(trans, ofs, val);
1099 }
1100
iwl_trans_write32(struct iwl_trans * trans,u32 ofs,u32 val)1101 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1102 {
1103 trans->ops->write32(trans, ofs, val);
1104 }
1105
iwl_trans_read32(struct iwl_trans * trans,u32 ofs)1106 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
1107 {
1108 return trans->ops->read32(trans, ofs);
1109 }
1110
iwl_trans_read_prph(struct iwl_trans * trans,u32 ofs)1111 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
1112 {
1113 return trans->ops->read_prph(trans, ofs);
1114 }
1115
iwl_trans_write_prph(struct iwl_trans * trans,u32 ofs,u32 val)1116 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
1117 u32 val)
1118 {
1119 return trans->ops->write_prph(trans, ofs, val);
1120 }
1121
iwl_trans_read_mem(struct iwl_trans * trans,u32 addr,void * buf,int dwords)1122 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
1123 void *buf, int dwords)
1124 {
1125 return trans->ops->read_mem(trans, addr, buf, dwords);
1126 }
1127
1128 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \
1129 do { \
1130 if (__builtin_constant_p(bufsize)) \
1131 BUILD_BUG_ON((bufsize) % sizeof(u32)); \
1132 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
1133 } while (0)
1134
iwl_trans_read_mem32(struct iwl_trans * trans,u32 addr)1135 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
1136 {
1137 u32 value;
1138
1139 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
1140 return 0xa5a5a5a5;
1141
1142 return value;
1143 }
1144
iwl_trans_write_mem(struct iwl_trans * trans,u32 addr,const void * buf,int dwords)1145 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
1146 const void *buf, int dwords)
1147 {
1148 return trans->ops->write_mem(trans, addr, buf, dwords);
1149 }
1150
iwl_trans_write_mem32(struct iwl_trans * trans,u32 addr,u32 val)1151 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
1152 u32 val)
1153 {
1154 return iwl_trans_write_mem(trans, addr, &val, 1);
1155 }
1156
iwl_trans_set_pmi(struct iwl_trans * trans,bool state)1157 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
1158 {
1159 if (trans->ops->set_pmi)
1160 trans->ops->set_pmi(trans, state);
1161 }
1162
iwl_trans_sw_reset(struct iwl_trans * trans)1163 static inline void iwl_trans_sw_reset(struct iwl_trans *trans)
1164 {
1165 if (trans->ops->sw_reset)
1166 trans->ops->sw_reset(trans);
1167 }
1168
1169 static inline void
iwl_trans_set_bits_mask(struct iwl_trans * trans,u32 reg,u32 mask,u32 value)1170 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
1171 {
1172 trans->ops->set_bits_mask(trans, reg, mask, value);
1173 }
1174
1175 #define iwl_trans_grab_nic_access(trans, flags) \
1176 __cond_lock(nic_access, \
1177 likely((trans)->ops->grab_nic_access(trans, flags)))
1178
__releases(nic_access)1179 static inline void __releases(nic_access)
1180 iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags)
1181 {
1182 trans->ops->release_nic_access(trans, flags);
1183 __release(nic_access);
1184 }
1185
iwl_trans_fw_error(struct iwl_trans * trans)1186 static inline void iwl_trans_fw_error(struct iwl_trans *trans)
1187 {
1188 if (WARN_ON_ONCE(!trans->op_mode))
1189 return;
1190
1191 /* prevent double restarts due to the same erroneous FW */
1192 if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status))
1193 iwl_op_mode_nic_error(trans->op_mode);
1194 }
1195
1196 /*****************************************************
1197 * transport helper functions
1198 *****************************************************/
1199 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
1200 struct device *dev,
1201 const struct iwl_cfg *cfg,
1202 const struct iwl_trans_ops *ops);
1203 void iwl_trans_free(struct iwl_trans *trans);
1204 void iwl_trans_ref(struct iwl_trans *trans);
1205 void iwl_trans_unref(struct iwl_trans *trans);
1206
1207 /*****************************************************
1208 * driver (transport) register/unregister functions
1209 ******************************************************/
1210 int __must_check iwl_pci_register_driver(void);
1211 void iwl_pci_unregister_driver(void);
1212
1213 #endif /* __iwl_trans_h__ */
1214