Loading...
Note: File does not exist in v3.15.
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 * Copyright(c) 2018 - 2019 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
24 *
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *
29 * BSD LICENSE
30 *
31 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 - 2019 Intel Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
46 * distribution.
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *
63 *****************************************************************************/
64#ifndef __iwl_trans_h__
65#define __iwl_trans_h__
66
67#include <linux/ieee80211.h>
68#include <linux/mm.h> /* for page_address */
69#include <linux/lockdep.h>
70#include <linux/kernel.h>
71
72#include "iwl-debug.h"
73#include "iwl-config.h"
74#include "fw/img.h"
75#include "iwl-op-mode.h"
76#include "fw/api/cmdhdr.h"
77#include "fw/api/txq.h"
78#include "fw/api/dbg-tlv.h"
79#include "iwl-dbg-tlv.h"
80
81/**
82 * DOC: Transport layer - what is it ?
83 *
84 * The transport layer is the layer that deals with the HW directly. It provides
85 * an abstraction of the underlying HW to the upper layer. The transport layer
86 * doesn't provide any policy, algorithm or anything of this kind, but only
87 * mechanisms to make the HW do something. It is not completely stateless but
88 * close to it.
89 * We will have an implementation for each different supported bus.
90 */
91
92/**
93 * DOC: Life cycle of the transport layer
94 *
95 * The transport layer has a very precise life cycle.
96 *
97 * 1) A helper function is called during the module initialization and
98 * registers the bus driver's ops with the transport's alloc function.
99 * 2) Bus's probe calls to the transport layer's allocation functions.
100 * Of course this function is bus specific.
101 * 3) This allocation functions will spawn the upper layer which will
102 * register mac80211.
103 *
104 * 4) At some point (i.e. mac80211's start call), the op_mode will call
105 * the following sequence:
106 * start_hw
107 * start_fw
108 *
109 * 5) Then when finished (or reset):
110 * stop_device
111 *
112 * 6) Eventually, the free function will be called.
113 */
114
115#define IWL_TRANS_FW_DBG_DOMAIN(trans) IWL_FW_INI_DOMAIN_ALWAYS_ON
116
117#define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */
118#define FH_RSCSR_FRAME_INVALID 0x55550000
119#define FH_RSCSR_FRAME_ALIGN 0x40
120#define FH_RSCSR_RPA_EN BIT(25)
121#define FH_RSCSR_RADA_EN BIT(26)
122#define FH_RSCSR_RXQ_POS 16
123#define FH_RSCSR_RXQ_MASK 0x3F0000
124
125struct iwl_rx_packet {
126 /*
127 * The first 4 bytes of the RX frame header contain both the RX frame
128 * size and some flags.
129 * Bit fields:
130 * 31: flag flush RB request
131 * 30: flag ignore TC (terminal counter) request
132 * 29: flag fast IRQ request
133 * 28-27: Reserved
134 * 26: RADA enabled
135 * 25: Offload enabled
136 * 24: RPF enabled
137 * 23: RSS enabled
138 * 22: Checksum enabled
139 * 21-16: RX queue
140 * 15-14: Reserved
141 * 13-00: RX frame size
142 */
143 __le32 len_n_flags;
144 struct iwl_cmd_header hdr;
145 u8 data[];
146} __packed;
147
148static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt)
149{
150 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
151}
152
153static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt)
154{
155 return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr);
156}
157
158/**
159 * enum CMD_MODE - how to send the host commands ?
160 *
161 * @CMD_ASYNC: Return right away and don't wait for the response
162 * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of
163 * the response. The caller needs to call iwl_free_resp when done.
164 * @CMD_WANT_ASYNC_CALLBACK: the op_mode's async callback function must be
165 * called after this command completes. Valid only with CMD_ASYNC.
166 */
167enum CMD_MODE {
168 CMD_ASYNC = BIT(0),
169 CMD_WANT_SKB = BIT(1),
170 CMD_SEND_IN_RFKILL = BIT(2),
171 CMD_WANT_ASYNC_CALLBACK = BIT(3),
172};
173
174#define DEF_CMD_PAYLOAD_SIZE 320
175
176/**
177 * struct iwl_device_cmd
178 *
179 * For allocation of the command and tx queues, this establishes the overall
180 * size of the largest command we send to uCode, except for commands that
181 * aren't fully copied and use other TFD space.
182 */
183struct iwl_device_cmd {
184 union {
185 struct {
186 struct iwl_cmd_header hdr; /* uCode API */
187 u8 payload[DEF_CMD_PAYLOAD_SIZE];
188 };
189 struct {
190 struct iwl_cmd_header_wide hdr_wide;
191 u8 payload_wide[DEF_CMD_PAYLOAD_SIZE -
192 sizeof(struct iwl_cmd_header_wide) +
193 sizeof(struct iwl_cmd_header)];
194 };
195 };
196} __packed;
197
198/**
199 * struct iwl_device_tx_cmd - buffer for TX command
200 * @hdr: the header
201 * @payload: the payload placeholder
202 *
203 * The actual structure is sized dynamically according to need.
204 */
205struct iwl_device_tx_cmd {
206 struct iwl_cmd_header hdr;
207 u8 payload[];
208} __packed;
209
210#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
211
212/*
213 * number of transfer buffers (fragments) per transmit frame descriptor;
214 * this is just the driver's idea, the hardware supports 20
215 */
216#define IWL_MAX_CMD_TBS_PER_TFD 2
217
218/**
219 * enum iwl_hcmd_dataflag - flag for each one of the chunks of the command
220 *
221 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
222 * ring. The transport layer doesn't map the command's buffer to DMA, but
223 * rather copies it to a previously allocated DMA buffer. This flag tells
224 * the transport layer not to copy the command, but to map the existing
225 * buffer (that is passed in) instead. This saves the memcpy and allows
226 * commands that are bigger than the fixed buffer to be submitted.
227 * Note that a TFD entry after a NOCOPY one cannot be a normal copied one.
228 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
229 * chunk internally and free it again after the command completes. This
230 * can (currently) be used only once per command.
231 * Note that a TFD entry after a DUP one cannot be a normal copied one.
232 */
233enum iwl_hcmd_dataflag {
234 IWL_HCMD_DFL_NOCOPY = BIT(0),
235 IWL_HCMD_DFL_DUP = BIT(1),
236};
237
238enum iwl_error_event_table_status {
239 IWL_ERROR_EVENT_TABLE_LMAC1 = BIT(0),
240 IWL_ERROR_EVENT_TABLE_LMAC2 = BIT(1),
241 IWL_ERROR_EVENT_TABLE_UMAC = BIT(2),
242};
243
244/**
245 * struct iwl_host_cmd - Host command to the uCode
246 *
247 * @data: array of chunks that composes the data of the host command
248 * @resp_pkt: response packet, if %CMD_WANT_SKB was set
249 * @_rx_page_order: (internally used to free response packet)
250 * @_rx_page_addr: (internally used to free response packet)
251 * @flags: can be CMD_*
252 * @len: array of the lengths of the chunks in data
253 * @dataflags: IWL_HCMD_DFL_*
254 * @id: command id of the host command, for wide commands encoding the
255 * version and group as well
256 */
257struct iwl_host_cmd {
258 const void *data[IWL_MAX_CMD_TBS_PER_TFD];
259 struct iwl_rx_packet *resp_pkt;
260 unsigned long _rx_page_addr;
261 u32 _rx_page_order;
262
263 u32 flags;
264 u32 id;
265 u16 len[IWL_MAX_CMD_TBS_PER_TFD];
266 u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD];
267};
268
269static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
270{
271 free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
272}
273
274struct iwl_rx_cmd_buffer {
275 struct page *_page;
276 int _offset;
277 bool _page_stolen;
278 u32 _rx_page_order;
279 unsigned int truesize;
280};
281
282static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
283{
284 return (void *)((unsigned long)page_address(r->_page) + r->_offset);
285}
286
287static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
288{
289 return r->_offset;
290}
291
292static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
293{
294 r->_page_stolen = true;
295 get_page(r->_page);
296 return r->_page;
297}
298
299static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
300{
301 __free_pages(r->_page, r->_rx_page_order);
302}
303
304#define MAX_NO_RECLAIM_CMDS 6
305
306#define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
307
308/*
309 * Maximum number of HW queues the transport layer
310 * currently supports
311 */
312#define IWL_MAX_HW_QUEUES 32
313#define IWL_MAX_TVQM_QUEUES 512
314
315#define IWL_MAX_TID_COUNT 8
316#define IWL_MGMT_TID 15
317#define IWL_FRAME_LIMIT 64
318#define IWL_MAX_RX_HW_QUEUES 16
319
320/**
321 * enum iwl_wowlan_status - WoWLAN image/device status
322 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
323 * @IWL_D3_STATUS_RESET: device was reset while suspended
324 */
325enum iwl_d3_status {
326 IWL_D3_STATUS_ALIVE,
327 IWL_D3_STATUS_RESET,
328};
329
330/**
331 * enum iwl_trans_status: transport status flags
332 * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed
333 * @STATUS_DEVICE_ENABLED: APM is enabled
334 * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up)
335 * @STATUS_INT_ENABLED: interrupts are enabled
336 * @STATUS_RFKILL_HW: the actual HW state of the RF-kill switch
337 * @STATUS_RFKILL_OPMODE: RF-kill state reported to opmode
338 * @STATUS_FW_ERROR: the fw is in error state
339 * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands
340 * are sent
341 * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent
342 * @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation
343 */
344enum iwl_trans_status {
345 STATUS_SYNC_HCMD_ACTIVE,
346 STATUS_DEVICE_ENABLED,
347 STATUS_TPOWER_PMI,
348 STATUS_INT_ENABLED,
349 STATUS_RFKILL_HW,
350 STATUS_RFKILL_OPMODE,
351 STATUS_FW_ERROR,
352 STATUS_TRANS_GOING_IDLE,
353 STATUS_TRANS_IDLE,
354 STATUS_TRANS_DEAD,
355};
356
357static inline int
358iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)
359{
360 switch (rb_size) {
361 case IWL_AMSDU_2K:
362 return get_order(2 * 1024);
363 case IWL_AMSDU_4K:
364 return get_order(4 * 1024);
365 case IWL_AMSDU_8K:
366 return get_order(8 * 1024);
367 case IWL_AMSDU_12K:
368 return get_order(12 * 1024);
369 default:
370 WARN_ON(1);
371 return -1;
372 }
373}
374
375static inline int
376iwl_trans_get_rb_size(enum iwl_amsdu_size rb_size)
377{
378 switch (rb_size) {
379 case IWL_AMSDU_2K:
380 return 2 * 1024;
381 case IWL_AMSDU_4K:
382 return 4 * 1024;
383 case IWL_AMSDU_8K:
384 return 8 * 1024;
385 case IWL_AMSDU_12K:
386 return 12 * 1024;
387 default:
388 WARN_ON(1);
389 return 0;
390 }
391}
392
393struct iwl_hcmd_names {
394 u8 cmd_id;
395 const char *const cmd_name;
396};
397
398#define HCMD_NAME(x) \
399 { .cmd_id = x, .cmd_name = #x }
400
401struct iwl_hcmd_arr {
402 const struct iwl_hcmd_names *arr;
403 int size;
404};
405
406#define HCMD_ARR(x) \
407 { .arr = x, .size = ARRAY_SIZE(x) }
408
409/**
410 * struct iwl_trans_config - transport configuration
411 *
412 * @op_mode: pointer to the upper layer.
413 * @cmd_queue: the index of the command queue.
414 * Must be set before start_fw.
415 * @cmd_fifo: the fifo for host commands
416 * @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue.
417 * @no_reclaim_cmds: Some devices erroneously don't set the
418 * SEQ_RX_FRAME bit on some notifications, this is the
419 * list of such notifications to filter. Max length is
420 * %MAX_NO_RECLAIM_CMDS.
421 * @n_no_reclaim_cmds: # of commands in list
422 * @rx_buf_size: RX buffer size needed for A-MSDUs
423 * if unset 4k will be the RX buffer size
424 * @bc_table_dword: set to true if the BC table expects the byte count to be
425 * in DWORD (as opposed to bytes)
426 * @scd_set_active: should the transport configure the SCD for HCMD queue
427 * @sw_csum_tx: transport should compute the TCP checksum
428 * @command_groups: array of command groups, each member is an array of the
429 * commands in the group; for debugging only
430 * @command_groups_size: number of command groups, to avoid illegal access
431 * @cb_data_offs: offset inside skb->cb to store transport data at, must have
432 * space for at least two pointers
433 */
434struct iwl_trans_config {
435 struct iwl_op_mode *op_mode;
436
437 u8 cmd_queue;
438 u8 cmd_fifo;
439 unsigned int cmd_q_wdg_timeout;
440 const u8 *no_reclaim_cmds;
441 unsigned int n_no_reclaim_cmds;
442
443 enum iwl_amsdu_size rx_buf_size;
444 bool bc_table_dword;
445 bool scd_set_active;
446 bool sw_csum_tx;
447 const struct iwl_hcmd_arr *command_groups;
448 int command_groups_size;
449
450 u8 cb_data_offs;
451};
452
453struct iwl_trans_dump_data {
454 u32 len;
455 u8 data[];
456};
457
458struct iwl_trans;
459
460struct iwl_trans_txq_scd_cfg {
461 u8 fifo;
462 u8 sta_id;
463 u8 tid;
464 bool aggregate;
465 int frame_limit;
466};
467
468/**
469 * struct iwl_trans_rxq_dma_data - RX queue DMA data
470 * @fr_bd_cb: DMA address of free BD cyclic buffer
471 * @fr_bd_wid: Initial write index of the free BD cyclic buffer
472 * @urbd_stts_wrptr: DMA address of urbd_stts_wrptr
473 * @ur_bd_cb: DMA address of used BD cyclic buffer
474 */
475struct iwl_trans_rxq_dma_data {
476 u64 fr_bd_cb;
477 u32 fr_bd_wid;
478 u64 urbd_stts_wrptr;
479 u64 ur_bd_cb;
480};
481
482/**
483 * struct iwl_trans_ops - transport specific operations
484 *
485 * All the handlers MUST be implemented
486 *
487 * @start_hw: starts the HW. From that point on, the HW can send interrupts.
488 * May sleep.
489 * @op_mode_leave: Turn off the HW RF kill indication if on
490 * May sleep
491 * @start_fw: allocates and inits all the resources for the transport
492 * layer. Also kick a fw image.
493 * May sleep
494 * @fw_alive: called when the fw sends alive notification. If the fw provides
495 * the SCD base address in SRAM, then provide it here, or 0 otherwise.
496 * May sleep
497 * @stop_device: stops the whole device (embedded CPU put to reset) and stops
498 * the HW. From that point on, the HW will be stopped but will still issue
499 * an interrupt if the HW RF kill switch is triggered.
500 * This callback must do the right thing and not crash even if %start_hw()
501 * was called but not &start_fw(). May sleep.
502 * @d3_suspend: put the device into the correct mode for WoWLAN during
503 * suspend. This is optional, if not implemented WoWLAN will not be
504 * supported. This callback may sleep.
505 * @d3_resume: resume the device after WoWLAN, enabling the opmode to
506 * talk to the WoWLAN image to get its status. This is optional, if not
507 * implemented WoWLAN will not be supported. This callback may sleep.
508 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
509 * If RFkill is asserted in the middle of a SYNC host command, it must
510 * return -ERFKILL straight away.
511 * May sleep only if CMD_ASYNC is not set
512 * @tx: send an skb. The transport relies on the op_mode to zero the
513 * the ieee80211_tx_info->driver_data. If the MPDU is an A-MSDU, all
514 * the CSUM will be taken care of (TCP CSUM and IP header in case of
515 * IPv4). If the MPDU is a single MSDU, the op_mode must compute the IP
516 * header if it is IPv4.
517 * Must be atomic
518 * @reclaim: free packet until ssn. Returns a list of freed packets.
519 * Must be atomic
520 * @txq_enable: setup a queue. To setup an AC queue, use the
521 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
522 * this one. The op_mode must not configure the HCMD queue. The scheduler
523 * configuration may be %NULL, in which case the hardware will not be
524 * configured. If true is returned, the operation mode needs to increment
525 * the sequence number of the packets routed to this queue because of a
526 * hardware scheduler bug. May sleep.
527 * @txq_disable: de-configure a Tx queue to send AMPDUs
528 * Must be atomic
529 * @txq_set_shared_mode: change Tx queue shared/unshared marking
530 * @wait_tx_queues_empty: wait until tx queues are empty. May sleep.
531 * @wait_txq_empty: wait until specific tx queue is empty. May sleep.
532 * @freeze_txq_timer: prevents the timer of the queue from firing until the
533 * queue is set to awake. Must be atomic.
534 * @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note
535 * that the transport needs to refcount the calls since this function
536 * will be called several times with block = true, and then the queues
537 * need to be unblocked only after the same number of calls with
538 * block = false.
539 * @write8: write a u8 to a register at offset ofs from the BAR
540 * @write32: write a u32 to a register at offset ofs from the BAR
541 * @read32: read a u32 register at offset ofs from the BAR
542 * @read_prph: read a DWORD from a periphery register
543 * @write_prph: write a DWORD to a periphery register
544 * @read_mem: read device's SRAM in DWORD
545 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
546 * will be zeroed.
547 * @read_config32: read a u32 value from the device's config space at
548 * the given offset.
549 * @configure: configure parameters required by the transport layer from
550 * the op_mode. May be called several times before start_fw, can't be
551 * called after that.
552 * @set_pmi: set the power pmi state
553 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs.
554 * Sleeping is not allowed between grab_nic_access and
555 * release_nic_access.
556 * @release_nic_access: let the NIC go to sleep. The "flags" parameter
557 * must be the same one that was sent before to the grab_nic_access.
558 * @set_bits_mask - set SRAM register according to value and mask.
559 * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last
560 * TX'ed commands and similar. The buffer will be vfree'd by the caller.
561 * Note that the transport must fill in the proper file headers.
562 * @debugfs_cleanup: used in the driver unload flow to make a proper cleanup
563 * of the trans debugfs
564 */
565struct iwl_trans_ops {
566
567 int (*start_hw)(struct iwl_trans *iwl_trans);
568 void (*op_mode_leave)(struct iwl_trans *iwl_trans);
569 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
570 bool run_in_rfkill);
571 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
572 void (*stop_device)(struct iwl_trans *trans);
573
574 int (*d3_suspend)(struct iwl_trans *trans, bool test, bool reset);
575 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status,
576 bool test, bool reset);
577
578 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
579
580 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
581 struct iwl_device_tx_cmd *dev_cmd, int queue);
582 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
583 struct sk_buff_head *skbs);
584
585 void (*set_q_ptrs)(struct iwl_trans *trans, int queue, int ptr);
586
587 bool (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
588 const struct iwl_trans_txq_scd_cfg *cfg,
589 unsigned int queue_wdg_timeout);
590 void (*txq_disable)(struct iwl_trans *trans, int queue,
591 bool configure_scd);
592 /* 22000 functions */
593 int (*txq_alloc)(struct iwl_trans *trans,
594 __le16 flags, u8 sta_id, u8 tid,
595 int cmd_id, int size,
596 unsigned int queue_wdg_timeout);
597 void (*txq_free)(struct iwl_trans *trans, int queue);
598 int (*rxq_dma_data)(struct iwl_trans *trans, int queue,
599 struct iwl_trans_rxq_dma_data *data);
600
601 void (*txq_set_shared_mode)(struct iwl_trans *trans, u32 txq_id,
602 bool shared);
603
604 int (*wait_tx_queues_empty)(struct iwl_trans *trans, u32 txq_bm);
605 int (*wait_txq_empty)(struct iwl_trans *trans, int queue);
606 void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs,
607 bool freeze);
608 void (*block_txq_ptrs)(struct iwl_trans *trans, bool block);
609
610 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
611 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
612 u32 (*read32)(struct iwl_trans *trans, u32 ofs);
613 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
614 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
615 int (*read_mem)(struct iwl_trans *trans, u32 addr,
616 void *buf, int dwords);
617 int (*write_mem)(struct iwl_trans *trans, u32 addr,
618 const void *buf, int dwords);
619 int (*read_config32)(struct iwl_trans *trans, u32 ofs, u32 *val);
620 void (*configure)(struct iwl_trans *trans,
621 const struct iwl_trans_config *trans_cfg);
622 void (*set_pmi)(struct iwl_trans *trans, bool state);
623 void (*sw_reset)(struct iwl_trans *trans);
624 bool (*grab_nic_access)(struct iwl_trans *trans, unsigned long *flags);
625 void (*release_nic_access)(struct iwl_trans *trans,
626 unsigned long *flags);
627 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
628 u32 value);
629 int (*suspend)(struct iwl_trans *trans);
630 void (*resume)(struct iwl_trans *trans);
631
632 struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans,
633 u32 dump_mask);
634 void (*debugfs_cleanup)(struct iwl_trans *trans);
635 void (*sync_nmi)(struct iwl_trans *trans);
636};
637
638/**
639 * enum iwl_trans_state - state of the transport layer
640 *
641 * @IWL_TRANS_NO_FW: no fw has sent an alive response
642 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
643 */
644enum iwl_trans_state {
645 IWL_TRANS_NO_FW = 0,
646 IWL_TRANS_FW_ALIVE = 1,
647};
648
649/**
650 * DOC: Platform power management
651 *
652 * In system-wide power management the entire platform goes into a low
653 * power state (e.g. idle or suspend to RAM) at the same time and the
654 * device is configured as a wakeup source for the entire platform.
655 * This is usually triggered by userspace activity (e.g. the user
656 * presses the suspend button or a power management daemon decides to
657 * put the platform in low power mode). The device's behavior in this
658 * mode is dictated by the wake-on-WLAN configuration.
659 *
660 * The terms used for the device's behavior are as follows:
661 *
662 * - D0: the device is fully powered and the host is awake;
663 * - D3: the device is in low power mode and only reacts to
664 * specific events (e.g. magic-packet received or scan
665 * results found);
666 *
667 * These terms reflect the power modes in the firmware and are not to
668 * be confused with the physical device power state.
669 */
670
671/**
672 * enum iwl_plat_pm_mode - platform power management mode
673 *
674 * This enumeration describes the device's platform power management
675 * behavior when in system-wide suspend (i.e WoWLAN).
676 *
677 * @IWL_PLAT_PM_MODE_DISABLED: power management is disabled for this
678 * device. In system-wide suspend mode, it means that the all
679 * connections will be closed automatically by mac80211 before
680 * the platform is suspended.
681 * @IWL_PLAT_PM_MODE_D3: the device goes into D3 mode (i.e. WoWLAN).
682 */
683enum iwl_plat_pm_mode {
684 IWL_PLAT_PM_MODE_DISABLED,
685 IWL_PLAT_PM_MODE_D3,
686};
687
688/**
689 * enum iwl_ini_cfg_state
690 * @IWL_INI_CFG_STATE_NOT_LOADED: no debug cfg was given
691 * @IWL_INI_CFG_STATE_LOADED: debug cfg was found and loaded
692 * @IWL_INI_CFG_STATE_CORRUPTED: debug cfg was found and some of the TLVs
693 * are corrupted. The rest of the debug TLVs will still be used
694 */
695enum iwl_ini_cfg_state {
696 IWL_INI_CFG_STATE_NOT_LOADED,
697 IWL_INI_CFG_STATE_LOADED,
698 IWL_INI_CFG_STATE_CORRUPTED,
699};
700
701/* Max time to wait for nmi interrupt */
702#define IWL_TRANS_NMI_TIMEOUT (HZ / 4)
703
704/**
705 * struct iwl_dram_data
706 * @physical: page phy pointer
707 * @block: pointer to the allocated block/page
708 * @size: size of the block/page
709 */
710struct iwl_dram_data {
711 dma_addr_t physical;
712 void *block;
713 int size;
714};
715
716/**
717 * struct iwl_fw_mon - fw monitor per allocation id
718 * @num_frags: number of fragments
719 * @frags: an array of DRAM buffer fragments
720 */
721struct iwl_fw_mon {
722 u32 num_frags;
723 struct iwl_dram_data *frags;
724};
725
726/**
727 * struct iwl_self_init_dram - dram data used by self init process
728 * @fw: lmac and umac dram data
729 * @fw_cnt: total number of items in array
730 * @paging: paging dram data
731 * @paging_cnt: total number of items in array
732 */
733struct iwl_self_init_dram {
734 struct iwl_dram_data *fw;
735 int fw_cnt;
736 struct iwl_dram_data *paging;
737 int paging_cnt;
738};
739
740/**
741 * struct iwl_trans_debug - transport debug related data
742 *
743 * @n_dest_reg: num of reg_ops in %dbg_dest_tlv
744 * @rec_on: true iff there is a fw debug recording currently active
745 * @dest_tlv: points to the destination TLV for debug
746 * @conf_tlv: array of pointers to configuration TLVs for debug
747 * @trigger_tlv: array of pointers to triggers TLVs for debug
748 * @lmac_error_event_table: addrs of lmacs error tables
749 * @umac_error_event_table: addr of umac error table
750 * @error_event_table_tlv_status: bitmap that indicates what error table
751 * pointers was recevied via TLV. uses enum &iwl_error_event_table_status
752 * @internal_ini_cfg: internal debug cfg state. Uses &enum iwl_ini_cfg_state
753 * @external_ini_cfg: external debug cfg state. Uses &enum iwl_ini_cfg_state
754 * @fw_mon_cfg: debug buffer allocation configuration
755 * @fw_mon_ini: DRAM buffer fragments per allocation id
756 * @fw_mon: DRAM buffer for firmware monitor
757 * @hw_error: equals true if hw error interrupt was received from the FW
758 * @ini_dest: debug monitor destination uses &enum iwl_fw_ini_buffer_location
759 * @active_regions: active regions
760 * @debug_info_tlv_list: list of debug info TLVs
761 * @time_point: array of debug time points
762 * @periodic_trig_list: periodic triggers list
763 * @domains_bitmap: bitmap of active domains other than
764 * &IWL_FW_INI_DOMAIN_ALWAYS_ON
765 */
766struct iwl_trans_debug {
767 u8 n_dest_reg;
768 bool rec_on;
769
770 const struct iwl_fw_dbg_dest_tlv_v1 *dest_tlv;
771 const struct iwl_fw_dbg_conf_tlv *conf_tlv[FW_DBG_CONF_MAX];
772 struct iwl_fw_dbg_trigger_tlv * const *trigger_tlv;
773
774 u32 lmac_error_event_table[2];
775 u32 umac_error_event_table;
776 unsigned int error_event_table_tlv_status;
777
778 enum iwl_ini_cfg_state internal_ini_cfg;
779 enum iwl_ini_cfg_state external_ini_cfg;
780
781 struct iwl_fw_ini_allocation_tlv fw_mon_cfg[IWL_FW_INI_ALLOCATION_NUM];
782 struct iwl_fw_mon fw_mon_ini[IWL_FW_INI_ALLOCATION_NUM];
783
784 struct iwl_dram_data fw_mon;
785
786 bool hw_error;
787 enum iwl_fw_ini_buffer_location ini_dest;
788
789 struct iwl_ucode_tlv *active_regions[IWL_FW_INI_MAX_REGION_ID];
790 struct list_head debug_info_tlv_list;
791 struct iwl_dbg_tlv_time_point_data
792 time_point[IWL_FW_INI_TIME_POINT_NUM];
793 struct list_head periodic_trig_list;
794
795 u32 domains_bitmap;
796};
797
798struct iwl_dma_ptr {
799 dma_addr_t dma;
800 void *addr;
801 size_t size;
802};
803
804struct iwl_cmd_meta {
805 /* only for SYNC commands, iff the reply skb is wanted */
806 struct iwl_host_cmd *source;
807 u32 flags;
808 u32 tbs;
809};
810
811/*
812 * The FH will write back to the first TB only, so we need to copy some data
813 * into the buffer regardless of whether it should be mapped or not.
814 * This indicates how big the first TB must be to include the scratch buffer
815 * and the assigned PN.
816 * Since PN location is 8 bytes at offset 12, it's 20 now.
817 * If we make it bigger then allocations will be bigger and copy slower, so
818 * that's probably not useful.
819 */
820#define IWL_FIRST_TB_SIZE 20
821#define IWL_FIRST_TB_SIZE_ALIGN ALIGN(IWL_FIRST_TB_SIZE, 64)
822
823struct iwl_pcie_txq_entry {
824 void *cmd;
825 struct sk_buff *skb;
826 /* buffer to free after command completes */
827 const void *free_buf;
828 struct iwl_cmd_meta meta;
829};
830
831struct iwl_pcie_first_tb_buf {
832 u8 buf[IWL_FIRST_TB_SIZE_ALIGN];
833};
834
835/**
836 * struct iwl_txq - Tx Queue for DMA
837 * @q: generic Rx/Tx queue descriptor
838 * @tfds: transmit frame descriptors (DMA memory)
839 * @first_tb_bufs: start of command headers, including scratch buffers, for
840 * the writeback -- this is DMA memory and an array holding one buffer
841 * for each command on the queue
842 * @first_tb_dma: DMA address for the first_tb_bufs start
843 * @entries: transmit entries (driver state)
844 * @lock: queue lock
845 * @stuck_timer: timer that fires if queue gets stuck
846 * @trans: pointer back to transport (for timer)
847 * @need_update: indicates need to update read/write index
848 * @ampdu: true if this queue is an ampdu queue for an specific RA/TID
849 * @wd_timeout: queue watchdog timeout (jiffies) - per queue
850 * @frozen: tx stuck queue timer is frozen
851 * @frozen_expiry_remainder: remember how long until the timer fires
852 * @bc_tbl: byte count table of the queue (relevant only for gen2 transport)
853 * @write_ptr: 1-st empty entry (index) host_w
854 * @read_ptr: last used entry (index) host_r
855 * @dma_addr: physical addr for BD's
856 * @n_window: safe queue window
857 * @id: queue id
858 * @low_mark: low watermark, resume queue if free space more than this
859 * @high_mark: high watermark, stop queue if free space less than this
860 *
861 * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
862 * descriptors) and required locking structures.
863 *
864 * Note the difference between TFD_QUEUE_SIZE_MAX and n_window: the hardware
865 * always assumes 256 descriptors, so TFD_QUEUE_SIZE_MAX is always 256 (unless
866 * there might be HW changes in the future). For the normal TX
867 * queues, n_window, which is the size of the software queue data
868 * is also 256; however, for the command queue, n_window is only
869 * 32 since we don't need so many commands pending. Since the HW
870 * still uses 256 BDs for DMA though, TFD_QUEUE_SIZE_MAX stays 256.
871 * This means that we end up with the following:
872 * HW entries: | 0 | ... | N * 32 | ... | N * 32 + 31 | ... | 255 |
873 * SW entries: | 0 | ... | 31 |
874 * where N is a number between 0 and 7. This means that the SW
875 * data is a window overlayed over the HW queue.
876 */
877struct iwl_txq {
878 void *tfds;
879 struct iwl_pcie_first_tb_buf *first_tb_bufs;
880 dma_addr_t first_tb_dma;
881 struct iwl_pcie_txq_entry *entries;
882 /* lock for syncing changes on the queue */
883 spinlock_t lock;
884 unsigned long frozen_expiry_remainder;
885 struct timer_list stuck_timer;
886 struct iwl_trans *trans;
887 bool need_update;
888 bool frozen;
889 bool ampdu;
890 int block;
891 unsigned long wd_timeout;
892 struct sk_buff_head overflow_q;
893 struct iwl_dma_ptr bc_tbl;
894
895 int write_ptr;
896 int read_ptr;
897 dma_addr_t dma_addr;
898 int n_window;
899 u32 id;
900 int low_mark;
901 int high_mark;
902
903 bool overflow_tx;
904};
905
906/**
907 * struct iwl_trans_txqs - transport tx queues data
908 *
909 * @queue_used - bit mask of used queues
910 * @queue_stopped - bit mask of stopped queues
911 */
912struct iwl_trans_txqs {
913 unsigned long queue_used[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
914 unsigned long queue_stopped[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
915 struct iwl_txq *txq[IWL_MAX_TVQM_QUEUES];
916 struct {
917 u8 fifo;
918 u8 q_id;
919 unsigned int wdg_timeout;
920 } cmd;
921
922};
923
924/**
925 * struct iwl_trans - transport common data
926 *
927 * @ops - pointer to iwl_trans_ops
928 * @op_mode - pointer to the op_mode
929 * @trans_cfg: the trans-specific configuration part
930 * @cfg - pointer to the configuration
931 * @drv - pointer to iwl_drv
932 * @status: a bit-mask of transport status flags
933 * @dev - pointer to struct device * that represents the device
934 * @max_skb_frags: maximum number of fragments an SKB can have when transmitted.
935 * 0 indicates that frag SKBs (NETIF_F_SG) aren't supported.
936 * @hw_rf_id a u32 with the device RF ID
937 * @hw_id: a u32 with the ID of the device / sub-device.
938 * Set during transport allocation.
939 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
940 * @pm_support: set to true in start_hw if link pm is supported
941 * @ltr_enabled: set to true if the LTR is enabled
942 * @wide_cmd_header: true when ucode supports wide command header format
943 * @num_rx_queues: number of RX queues allocated by the transport;
944 * the transport must set this before calling iwl_drv_start()
945 * @iml_len: the length of the image loader
946 * @iml: a pointer to the image loader itself
947 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
948 * The user should use iwl_trans_{alloc,free}_tx_cmd.
949 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
950 * starting the firmware, used for tracing
951 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
952 * start of the 802.11 header in the @rx_mpdu_cmd
953 * @dflt_pwr_limit: default power limit fetched from the platform (ACPI)
954 * @system_pm_mode: the system-wide power management mode in use.
955 * This mode is set dynamically, depending on the WoWLAN values
956 * configured from the userspace at runtime.
957 * @iwl_trans_txqs: transport tx queues data.
958 */
959struct iwl_trans {
960 const struct iwl_trans_ops *ops;
961 struct iwl_op_mode *op_mode;
962 const struct iwl_cfg_trans_params *trans_cfg;
963 const struct iwl_cfg *cfg;
964 struct iwl_drv *drv;
965 enum iwl_trans_state state;
966 unsigned long status;
967
968 struct device *dev;
969 u32 max_skb_frags;
970 u32 hw_rev;
971 u32 hw_rf_id;
972 u32 hw_id;
973 char hw_id_str[52];
974
975 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
976
977 bool pm_support;
978 bool ltr_enabled;
979
980 const struct iwl_hcmd_arr *command_groups;
981 int command_groups_size;
982 bool wide_cmd_header;
983
984 u8 num_rx_queues;
985
986 size_t iml_len;
987 u8 *iml;
988
989 /* The following fields are internal only */
990 struct kmem_cache *dev_cmd_pool;
991 char dev_cmd_pool_name[50];
992
993 struct dentry *dbgfs_dir;
994
995#ifdef CONFIG_LOCKDEP
996 struct lockdep_map sync_cmd_lockdep_map;
997#endif
998
999 struct iwl_trans_debug dbg;
1000 struct iwl_self_init_dram init_dram;
1001
1002 enum iwl_plat_pm_mode system_pm_mode;
1003
1004 const char *name;
1005 struct iwl_trans_txqs txqs;
1006
1007 /* pointer to trans specific struct */
1008 /*Ensure that this pointer will always be aligned to sizeof pointer */
1009 char trans_specific[] __aligned(sizeof(void *));
1010};
1011
1012const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id);
1013int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans);
1014
1015static inline void iwl_trans_configure(struct iwl_trans *trans,
1016 const struct iwl_trans_config *trans_cfg)
1017{
1018 trans->op_mode = trans_cfg->op_mode;
1019
1020 trans->ops->configure(trans, trans_cfg);
1021 WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg));
1022}
1023
1024static inline int iwl_trans_start_hw(struct iwl_trans *trans)
1025{
1026 might_sleep();
1027
1028 return trans->ops->start_hw(trans);
1029}
1030
1031static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans)
1032{
1033 might_sleep();
1034
1035 if (trans->ops->op_mode_leave)
1036 trans->ops->op_mode_leave(trans);
1037
1038 trans->op_mode = NULL;
1039
1040 trans->state = IWL_TRANS_NO_FW;
1041}
1042
1043static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1044{
1045 might_sleep();
1046
1047 trans->state = IWL_TRANS_FW_ALIVE;
1048
1049 trans->ops->fw_alive(trans, scd_addr);
1050}
1051
1052static inline int iwl_trans_start_fw(struct iwl_trans *trans,
1053 const struct fw_img *fw,
1054 bool run_in_rfkill)
1055{
1056 might_sleep();
1057
1058 WARN_ON_ONCE(!trans->rx_mpdu_cmd);
1059
1060 clear_bit(STATUS_FW_ERROR, &trans->status);
1061 return trans->ops->start_fw(trans, fw, run_in_rfkill);
1062}
1063
1064static inline void iwl_trans_stop_device(struct iwl_trans *trans)
1065{
1066 might_sleep();
1067
1068 trans->ops->stop_device(trans);
1069
1070 trans->state = IWL_TRANS_NO_FW;
1071}
1072
1073static inline int iwl_trans_d3_suspend(struct iwl_trans *trans, bool test,
1074 bool reset)
1075{
1076 might_sleep();
1077 if (!trans->ops->d3_suspend)
1078 return 0;
1079
1080 return trans->ops->d3_suspend(trans, test, reset);
1081}
1082
1083static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
1084 enum iwl_d3_status *status,
1085 bool test, bool reset)
1086{
1087 might_sleep();
1088 if (!trans->ops->d3_resume)
1089 return 0;
1090
1091 return trans->ops->d3_resume(trans, status, test, reset);
1092}
1093
1094static inline int iwl_trans_suspend(struct iwl_trans *trans)
1095{
1096 if (!trans->ops->suspend)
1097 return 0;
1098
1099 return trans->ops->suspend(trans);
1100}
1101
1102static inline void iwl_trans_resume(struct iwl_trans *trans)
1103{
1104 if (trans->ops->resume)
1105 trans->ops->resume(trans);
1106}
1107
1108static inline struct iwl_trans_dump_data *
1109iwl_trans_dump_data(struct iwl_trans *trans, u32 dump_mask)
1110{
1111 if (!trans->ops->dump_data)
1112 return NULL;
1113 return trans->ops->dump_data(trans, dump_mask);
1114}
1115
1116static inline struct iwl_device_tx_cmd *
1117iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
1118{
1119 return kmem_cache_zalloc(trans->dev_cmd_pool, GFP_ATOMIC);
1120}
1121
1122int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
1123
1124static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
1125 struct iwl_device_tx_cmd *dev_cmd)
1126{
1127 kmem_cache_free(trans->dev_cmd_pool, dev_cmd);
1128}
1129
1130static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
1131 struct iwl_device_tx_cmd *dev_cmd, int queue)
1132{
1133 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
1134 return -EIO;
1135
1136 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1137 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1138 return -EIO;
1139 }
1140
1141 return trans->ops->tx(trans, skb, dev_cmd, queue);
1142}
1143
1144static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
1145 int ssn, struct sk_buff_head *skbs)
1146{
1147 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1148 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1149 return;
1150 }
1151
1152 trans->ops->reclaim(trans, queue, ssn, skbs);
1153}
1154
1155static inline void iwl_trans_set_q_ptrs(struct iwl_trans *trans, int queue,
1156 int ptr)
1157{
1158 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1159 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1160 return;
1161 }
1162
1163 trans->ops->set_q_ptrs(trans, queue, ptr);
1164}
1165
1166static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
1167 bool configure_scd)
1168{
1169 trans->ops->txq_disable(trans, queue, configure_scd);
1170}
1171
1172static inline bool
1173iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
1174 const struct iwl_trans_txq_scd_cfg *cfg,
1175 unsigned int queue_wdg_timeout)
1176{
1177 might_sleep();
1178
1179 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1180 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1181 return false;
1182 }
1183
1184 return trans->ops->txq_enable(trans, queue, ssn,
1185 cfg, queue_wdg_timeout);
1186}
1187
1188static inline int
1189iwl_trans_get_rxq_dma_data(struct iwl_trans *trans, int queue,
1190 struct iwl_trans_rxq_dma_data *data)
1191{
1192 if (WARN_ON_ONCE(!trans->ops->rxq_dma_data))
1193 return -ENOTSUPP;
1194
1195 return trans->ops->rxq_dma_data(trans, queue, data);
1196}
1197
1198static inline void
1199iwl_trans_txq_free(struct iwl_trans *trans, int queue)
1200{
1201 if (WARN_ON_ONCE(!trans->ops->txq_free))
1202 return;
1203
1204 trans->ops->txq_free(trans, queue);
1205}
1206
1207static inline int
1208iwl_trans_txq_alloc(struct iwl_trans *trans,
1209 __le16 flags, u8 sta_id, u8 tid,
1210 int cmd_id, int size,
1211 unsigned int wdg_timeout)
1212{
1213 might_sleep();
1214
1215 if (WARN_ON_ONCE(!trans->ops->txq_alloc))
1216 return -ENOTSUPP;
1217
1218 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1219 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1220 return -EIO;
1221 }
1222
1223 return trans->ops->txq_alloc(trans, flags, sta_id, tid,
1224 cmd_id, size, wdg_timeout);
1225}
1226
1227static inline void iwl_trans_txq_set_shared_mode(struct iwl_trans *trans,
1228 int queue, bool shared_mode)
1229{
1230 if (trans->ops->txq_set_shared_mode)
1231 trans->ops->txq_set_shared_mode(trans, queue, shared_mode);
1232}
1233
1234static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
1235 int fifo, int sta_id, int tid,
1236 int frame_limit, u16 ssn,
1237 unsigned int queue_wdg_timeout)
1238{
1239 struct iwl_trans_txq_scd_cfg cfg = {
1240 .fifo = fifo,
1241 .sta_id = sta_id,
1242 .tid = tid,
1243 .frame_limit = frame_limit,
1244 .aggregate = sta_id >= 0,
1245 };
1246
1247 iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout);
1248}
1249
1250static inline
1251void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo,
1252 unsigned int queue_wdg_timeout)
1253{
1254 struct iwl_trans_txq_scd_cfg cfg = {
1255 .fifo = fifo,
1256 .sta_id = -1,
1257 .tid = IWL_MAX_TID_COUNT,
1258 .frame_limit = IWL_FRAME_LIMIT,
1259 .aggregate = false,
1260 };
1261
1262 iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout);
1263}
1264
1265static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans,
1266 unsigned long txqs,
1267 bool freeze)
1268{
1269 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1270 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1271 return;
1272 }
1273
1274 if (trans->ops->freeze_txq_timer)
1275 trans->ops->freeze_txq_timer(trans, txqs, freeze);
1276}
1277
1278static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans,
1279 bool block)
1280{
1281 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1282 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1283 return;
1284 }
1285
1286 if (trans->ops->block_txq_ptrs)
1287 trans->ops->block_txq_ptrs(trans, block);
1288}
1289
1290static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans,
1291 u32 txqs)
1292{
1293 if (WARN_ON_ONCE(!trans->ops->wait_tx_queues_empty))
1294 return -ENOTSUPP;
1295
1296 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1297 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1298 return -EIO;
1299 }
1300
1301 return trans->ops->wait_tx_queues_empty(trans, txqs);
1302}
1303
1304static inline int iwl_trans_wait_txq_empty(struct iwl_trans *trans, int queue)
1305{
1306 if (WARN_ON_ONCE(!trans->ops->wait_txq_empty))
1307 return -ENOTSUPP;
1308
1309 if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
1310 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1311 return -EIO;
1312 }
1313
1314 return trans->ops->wait_txq_empty(trans, queue);
1315}
1316
1317static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1318{
1319 trans->ops->write8(trans, ofs, val);
1320}
1321
1322static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1323{
1324 trans->ops->write32(trans, ofs, val);
1325}
1326
1327static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
1328{
1329 return trans->ops->read32(trans, ofs);
1330}
1331
1332static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
1333{
1334 return trans->ops->read_prph(trans, ofs);
1335}
1336
1337static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
1338 u32 val)
1339{
1340 return trans->ops->write_prph(trans, ofs, val);
1341}
1342
1343static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
1344 void *buf, int dwords)
1345{
1346 return trans->ops->read_mem(trans, addr, buf, dwords);
1347}
1348
1349#define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \
1350 do { \
1351 if (__builtin_constant_p(bufsize)) \
1352 BUILD_BUG_ON((bufsize) % sizeof(u32)); \
1353 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
1354 } while (0)
1355
1356static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
1357{
1358 u32 value;
1359
1360 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
1361 return 0xa5a5a5a5;
1362
1363 return value;
1364}
1365
1366static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
1367 const void *buf, int dwords)
1368{
1369 return trans->ops->write_mem(trans, addr, buf, dwords);
1370}
1371
1372static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
1373 u32 val)
1374{
1375 return iwl_trans_write_mem(trans, addr, &val, 1);
1376}
1377
1378static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
1379{
1380 if (trans->ops->set_pmi)
1381 trans->ops->set_pmi(trans, state);
1382}
1383
1384static inline void iwl_trans_sw_reset(struct iwl_trans *trans)
1385{
1386 if (trans->ops->sw_reset)
1387 trans->ops->sw_reset(trans);
1388}
1389
1390static inline void
1391iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
1392{
1393 trans->ops->set_bits_mask(trans, reg, mask, value);
1394}
1395
1396#define iwl_trans_grab_nic_access(trans, flags) \
1397 __cond_lock(nic_access, \
1398 likely((trans)->ops->grab_nic_access(trans, flags)))
1399
1400static inline void __releases(nic_access)
1401iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags)
1402{
1403 trans->ops->release_nic_access(trans, flags);
1404 __release(nic_access);
1405}
1406
1407static inline void iwl_trans_fw_error(struct iwl_trans *trans)
1408{
1409 if (WARN_ON_ONCE(!trans->op_mode))
1410 return;
1411
1412 /* prevent double restarts due to the same erroneous FW */
1413 if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status))
1414 iwl_op_mode_nic_error(trans->op_mode);
1415}
1416
1417static inline bool iwl_trans_fw_running(struct iwl_trans *trans)
1418{
1419 return trans->state == IWL_TRANS_FW_ALIVE;
1420}
1421
1422static inline void iwl_trans_sync_nmi(struct iwl_trans *trans)
1423{
1424 if (trans->ops->sync_nmi)
1425 trans->ops->sync_nmi(trans);
1426}
1427
1428static inline bool iwl_trans_dbg_ini_valid(struct iwl_trans *trans)
1429{
1430 return trans->dbg.internal_ini_cfg != IWL_INI_CFG_STATE_NOT_LOADED ||
1431 trans->dbg.external_ini_cfg != IWL_INI_CFG_STATE_NOT_LOADED;
1432}
1433
1434/*****************************************************
1435 * transport helper functions
1436 *****************************************************/
1437struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
1438 struct device *dev,
1439 const struct iwl_trans_ops *ops,
1440 unsigned int cmd_pool_size,
1441 unsigned int cmd_pool_align);
1442void iwl_trans_free(struct iwl_trans *trans);
1443
1444/*****************************************************
1445* driver (transport) register/unregister functions
1446******************************************************/
1447int __must_check iwl_pci_register_driver(void);
1448void iwl_pci_unregister_driver(void);
1449
1450#endif /* __iwl_trans_h__ */