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) 2012 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11  * Copyright(c) 2018 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) 2012 - 2014 Intel Corporation. All rights reserved.
32  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
33  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
34  * Copyright(c) 2018 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.
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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 #include <net/mac80211.h>
65 
66 #include "iwl-debug.h"
67 #include "iwl-io.h"
68 #include "iwl-prph.h"
69 #include "iwl-csr.h"
70 #include "mvm.h"
71 #include "fw/api/rs.h"
72 
73 /*
74  * Will return 0 even if the cmd failed when RFKILL is asserted unless
75  * CMD_WANT_SKB is set in cmd->flags.
76  */
77 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
78 {
79 	int ret;
80 
81 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
82 	if (WARN_ON(mvm->d3_test_active))
83 		return -EIO;
84 #endif
85 
86 	/*
87 	 * Synchronous commands from this op-mode must hold
88 	 * the mutex, this ensures we don't try to send two
89 	 * (or more) synchronous commands at a time.
90 	 */
91 	if (!(cmd->flags & CMD_ASYNC)) {
92 		lockdep_assert_held(&mvm->mutex);
93 		if (!(cmd->flags & CMD_SEND_IN_IDLE))
94 			iwl_mvm_ref(mvm, IWL_MVM_REF_SENDING_CMD);
95 	}
96 
97 	ret = iwl_trans_send_cmd(mvm->trans, cmd);
98 
99 	if (!(cmd->flags & (CMD_ASYNC | CMD_SEND_IN_IDLE)))
100 		iwl_mvm_unref(mvm, IWL_MVM_REF_SENDING_CMD);
101 
102 	/*
103 	 * If the caller wants the SKB, then don't hide any problems, the
104 	 * caller might access the response buffer which will be NULL if
105 	 * the command failed.
106 	 */
107 	if (cmd->flags & CMD_WANT_SKB)
108 		return ret;
109 
110 	/* Silently ignore failures if RFKILL is asserted */
111 	if (!ret || ret == -ERFKILL)
112 		return 0;
113 	return ret;
114 }
115 
116 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
117 			 u32 flags, u16 len, const void *data)
118 {
119 	struct iwl_host_cmd cmd = {
120 		.id = id,
121 		.len = { len, },
122 		.data = { data, },
123 		.flags = flags,
124 	};
125 
126 	return iwl_mvm_send_cmd(mvm, &cmd);
127 }
128 
129 /*
130  * We assume that the caller set the status to the success value
131  */
132 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
133 			    u32 *status)
134 {
135 	struct iwl_rx_packet *pkt;
136 	struct iwl_cmd_response *resp;
137 	int ret, resp_len;
138 
139 	lockdep_assert_held(&mvm->mutex);
140 
141 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
142 	if (WARN_ON(mvm->d3_test_active))
143 		return -EIO;
144 #endif
145 
146 	/*
147 	 * Only synchronous commands can wait for status,
148 	 * we use WANT_SKB so the caller can't.
149 	 */
150 	if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
151 		      "cmd flags %x", cmd->flags))
152 		return -EINVAL;
153 
154 	cmd->flags |= CMD_WANT_SKB;
155 
156 	ret = iwl_trans_send_cmd(mvm->trans, cmd);
157 	if (ret == -ERFKILL) {
158 		/*
159 		 * The command failed because of RFKILL, don't update
160 		 * the status, leave it as success and return 0.
161 		 */
162 		return 0;
163 	} else if (ret) {
164 		return ret;
165 	}
166 
167 	pkt = cmd->resp_pkt;
168 
169 	resp_len = iwl_rx_packet_payload_len(pkt);
170 	if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
171 		ret = -EIO;
172 		goto out_free_resp;
173 	}
174 
175 	resp = (void *)pkt->data;
176 	*status = le32_to_cpu(resp->status);
177  out_free_resp:
178 	iwl_free_resp(cmd);
179 	return ret;
180 }
181 
182 /*
183  * We assume that the caller set the status to the sucess value
184  */
185 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
186 				const void *data, u32 *status)
187 {
188 	struct iwl_host_cmd cmd = {
189 		.id = id,
190 		.len = { len, },
191 		.data = { data, },
192 	};
193 
194 	return iwl_mvm_send_cmd_status(mvm, &cmd, status);
195 }
196 
197 #define IWL_DECLARE_RATE_INFO(r) \
198 	[IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
199 
200 /*
201  * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
202  */
203 static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
204 	IWL_DECLARE_RATE_INFO(1),
205 	IWL_DECLARE_RATE_INFO(2),
206 	IWL_DECLARE_RATE_INFO(5),
207 	IWL_DECLARE_RATE_INFO(11),
208 	IWL_DECLARE_RATE_INFO(6),
209 	IWL_DECLARE_RATE_INFO(9),
210 	IWL_DECLARE_RATE_INFO(12),
211 	IWL_DECLARE_RATE_INFO(18),
212 	IWL_DECLARE_RATE_INFO(24),
213 	IWL_DECLARE_RATE_INFO(36),
214 	IWL_DECLARE_RATE_INFO(48),
215 	IWL_DECLARE_RATE_INFO(54),
216 };
217 
218 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
219 					enum nl80211_band band)
220 {
221 	int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
222 	int idx;
223 	int band_offset = 0;
224 
225 	/* Legacy rate format, search for match in table */
226 	if (band == NL80211_BAND_5GHZ)
227 		band_offset = IWL_FIRST_OFDM_RATE;
228 	for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
229 		if (fw_rate_idx_to_plcp[idx] == rate)
230 			return idx - band_offset;
231 
232 	return -1;
233 }
234 
235 u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
236 {
237 	/* Get PLCP rate for tx_cmd->rate_n_flags */
238 	return fw_rate_idx_to_plcp[rate_idx];
239 }
240 
241 void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
242 {
243 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
244 	struct iwl_error_resp *err_resp = (void *)pkt->data;
245 
246 	IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
247 		le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
248 	IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
249 		le16_to_cpu(err_resp->bad_cmd_seq_num),
250 		le32_to_cpu(err_resp->error_service));
251 	IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
252 		le64_to_cpu(err_resp->timestamp));
253 }
254 
255 /*
256  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
257  * The parameter should also be a combination of ANT_[ABC].
258  */
259 u8 first_antenna(u8 mask)
260 {
261 	BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
262 	if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
263 		return BIT(0);
264 	return BIT(ffs(mask) - 1);
265 }
266 
267 /*
268  * Toggles between TX antennas to send the probe request on.
269  * Receives the bitmask of valid TX antennas and the *index* used
270  * for the last TX, and returns the next valid *index* to use.
271  * In order to set it in the tx_cmd, must do BIT(idx).
272  */
273 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
274 {
275 	u8 ind = last_idx;
276 	int i;
277 
278 	for (i = 0; i < MAX_ANT_NUM; i++) {
279 		ind = (ind + 1) % MAX_ANT_NUM;
280 		if (valid & BIT(ind))
281 			return ind;
282 	}
283 
284 	WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
285 	return last_idx;
286 }
287 
288 #define FW_SYSASSERT_CPU_MASK 0xf0000000
289 static const struct {
290 	const char *name;
291 	u8 num;
292 } advanced_lookup[] = {
293 	{ "NMI_INTERRUPT_WDG", 0x34 },
294 	{ "SYSASSERT", 0x35 },
295 	{ "UCODE_VERSION_MISMATCH", 0x37 },
296 	{ "BAD_COMMAND", 0x38 },
297 	{ "BAD_COMMAND", 0x39 },
298 	{ "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
299 	{ "FATAL_ERROR", 0x3D },
300 	{ "NMI_TRM_HW_ERR", 0x46 },
301 	{ "NMI_INTERRUPT_TRM", 0x4C },
302 	{ "NMI_INTERRUPT_BREAK_POINT", 0x54 },
303 	{ "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
304 	{ "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
305 	{ "NMI_INTERRUPT_HOST", 0x66 },
306 	{ "NMI_INTERRUPT_LMAC_FATAL", 0x70 },
307 	{ "NMI_INTERRUPT_UMAC_FATAL", 0x71 },
308 	{ "NMI_INTERRUPT_OTHER_LMAC_FATAL", 0x73 },
309 	{ "NMI_INTERRUPT_ACTION_PT", 0x7C },
310 	{ "NMI_INTERRUPT_UNKNOWN", 0x84 },
311 	{ "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
312 	{ "ADVANCED_SYSASSERT", 0 },
313 };
314 
315 static const char *desc_lookup(u32 num)
316 {
317 	int i;
318 
319 	for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
320 		if (advanced_lookup[i].num == (num & ~FW_SYSASSERT_CPU_MASK))
321 			return advanced_lookup[i].name;
322 
323 	/* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
324 	return advanced_lookup[i].name;
325 }
326 
327 /*
328  * Note: This structure is read from the device with IO accesses,
329  * and the reading already does the endian conversion. As it is
330  * read with u32-sized accesses, any members with a different size
331  * need to be ordered correctly though!
332  */
333 struct iwl_error_event_table_v1 {
334 	u32 valid;		/* (nonzero) valid, (0) log is empty */
335 	u32 error_id;		/* type of error */
336 	u32 pc;			/* program counter */
337 	u32 blink1;		/* branch link */
338 	u32 blink2;		/* branch link */
339 	u32 ilink1;		/* interrupt link */
340 	u32 ilink2;		/* interrupt link */
341 	u32 data1;		/* error-specific data */
342 	u32 data2;		/* error-specific data */
343 	u32 data3;		/* error-specific data */
344 	u32 bcon_time;		/* beacon timer */
345 	u32 tsf_low;		/* network timestamp function timer */
346 	u32 tsf_hi;		/* network timestamp function timer */
347 	u32 gp1;		/* GP1 timer register */
348 	u32 gp2;		/* GP2 timer register */
349 	u32 gp3;		/* GP3 timer register */
350 	u32 ucode_ver;		/* uCode version */
351 	u32 hw_ver;		/* HW Silicon version */
352 	u32 brd_ver;		/* HW board version */
353 	u32 log_pc;		/* log program counter */
354 	u32 frame_ptr;		/* frame pointer */
355 	u32 stack_ptr;		/* stack pointer */
356 	u32 hcmd;		/* last host command header */
357 	u32 isr0;		/* isr status register LMPM_NIC_ISR0:
358 				 * rxtx_flag */
359 	u32 isr1;		/* isr status register LMPM_NIC_ISR1:
360 				 * host_flag */
361 	u32 isr2;		/* isr status register LMPM_NIC_ISR2:
362 				 * enc_flag */
363 	u32 isr3;		/* isr status register LMPM_NIC_ISR3:
364 				 * time_flag */
365 	u32 isr4;		/* isr status register LMPM_NIC_ISR4:
366 				 * wico interrupt */
367 	u32 isr_pref;		/* isr status register LMPM_NIC_PREF_STAT */
368 	u32 wait_event;		/* wait event() caller address */
369 	u32 l2p_control;	/* L2pControlField */
370 	u32 l2p_duration;	/* L2pDurationField */
371 	u32 l2p_mhvalid;	/* L2pMhValidBits */
372 	u32 l2p_addr_match;	/* L2pAddrMatchStat */
373 	u32 lmpm_pmg_sel;	/* indicate which clocks are turned on
374 				 * (LMPM_PMG_SEL) */
375 	u32 u_timestamp;	/* indicate when the date and time of the
376 				 * compilation */
377 	u32 flow_handler;	/* FH read/write pointers, RX credit */
378 } __packed /* LOG_ERROR_TABLE_API_S_VER_1 */;
379 
380 struct iwl_error_event_table {
381 	u32 valid;		/* (nonzero) valid, (0) log is empty */
382 	u32 error_id;		/* type of error */
383 	u32 trm_hw_status0;	/* TRM HW status */
384 	u32 trm_hw_status1;	/* TRM HW status */
385 	u32 blink2;		/* branch link */
386 	u32 ilink1;		/* interrupt link */
387 	u32 ilink2;		/* interrupt link */
388 	u32 data1;		/* error-specific data */
389 	u32 data2;		/* error-specific data */
390 	u32 data3;		/* error-specific data */
391 	u32 bcon_time;		/* beacon timer */
392 	u32 tsf_low;		/* network timestamp function timer */
393 	u32 tsf_hi;		/* network timestamp function timer */
394 	u32 gp1;		/* GP1 timer register */
395 	u32 gp2;		/* GP2 timer register */
396 	u32 fw_rev_type;	/* firmware revision type */
397 	u32 major;		/* uCode version major */
398 	u32 minor;		/* uCode version minor */
399 	u32 hw_ver;		/* HW Silicon version */
400 	u32 brd_ver;		/* HW board version */
401 	u32 log_pc;		/* log program counter */
402 	u32 frame_ptr;		/* frame pointer */
403 	u32 stack_ptr;		/* stack pointer */
404 	u32 hcmd;		/* last host command header */
405 	u32 isr0;		/* isr status register LMPM_NIC_ISR0:
406 				 * rxtx_flag */
407 	u32 isr1;		/* isr status register LMPM_NIC_ISR1:
408 				 * host_flag */
409 	u32 isr2;		/* isr status register LMPM_NIC_ISR2:
410 				 * enc_flag */
411 	u32 isr3;		/* isr status register LMPM_NIC_ISR3:
412 				 * time_flag */
413 	u32 isr4;		/* isr status register LMPM_NIC_ISR4:
414 				 * wico interrupt */
415 	u32 last_cmd_id;	/* last HCMD id handled by the firmware */
416 	u32 wait_event;		/* wait event() caller address */
417 	u32 l2p_control;	/* L2pControlField */
418 	u32 l2p_duration;	/* L2pDurationField */
419 	u32 l2p_mhvalid;	/* L2pMhValidBits */
420 	u32 l2p_addr_match;	/* L2pAddrMatchStat */
421 	u32 lmpm_pmg_sel;	/* indicate which clocks are turned on
422 				 * (LMPM_PMG_SEL) */
423 	u32 u_timestamp;	/* indicate when the date and time of the
424 				 * compilation */
425 	u32 flow_handler;	/* FH read/write pointers, RX credit */
426 } __packed /* LOG_ERROR_TABLE_API_S_VER_3 */;
427 
428 /*
429  * UMAC error struct - relevant starting from family 8000 chip.
430  * Note: This structure is read from the device with IO accesses,
431  * and the reading already does the endian conversion. As it is
432  * read with u32-sized accesses, any members with a different size
433  * need to be ordered correctly though!
434  */
435 struct iwl_umac_error_event_table {
436 	u32 valid;		/* (nonzero) valid, (0) log is empty */
437 	u32 error_id;		/* type of error */
438 	u32 blink1;		/* branch link */
439 	u32 blink2;		/* branch link */
440 	u32 ilink1;		/* interrupt link */
441 	u32 ilink2;		/* interrupt link */
442 	u32 data1;		/* error-specific data */
443 	u32 data2;		/* error-specific data */
444 	u32 data3;		/* error-specific data */
445 	u32 umac_major;
446 	u32 umac_minor;
447 	u32 frame_pointer;	/* core register 27*/
448 	u32 stack_pointer;	/* core register 28 */
449 	u32 cmd_header;		/* latest host cmd sent to UMAC */
450 	u32 nic_isr_pref;	/* ISR status register */
451 } __packed;
452 
453 #define ERROR_START_OFFSET  (1 * sizeof(u32))
454 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
455 
456 static void iwl_mvm_dump_umac_error_log(struct iwl_mvm *mvm)
457 {
458 	struct iwl_trans *trans = mvm->trans;
459 	struct iwl_umac_error_event_table table;
460 	u32 base = mvm->trans->umac_error_event_table;
461 
462 	if (!mvm->support_umac_log &&
463 	    !(mvm->trans->error_event_table_tlv_status &
464 	      IWL_ERROR_EVENT_TABLE_UMAC))
465 		return;
466 
467 	iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
468 
469 	if (table.valid)
470 		mvm->fwrt.dump.umac_err_id = table.error_id;
471 
472 	if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
473 		IWL_ERR(trans, "Start IWL Error Log Dump:\n");
474 		IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
475 			mvm->status, table.valid);
476 	}
477 
478 	IWL_ERR(mvm, "0x%08X | %s\n", table.error_id,
479 		desc_lookup(table.error_id));
480 	IWL_ERR(mvm, "0x%08X | umac branchlink1\n", table.blink1);
481 	IWL_ERR(mvm, "0x%08X | umac branchlink2\n", table.blink2);
482 	IWL_ERR(mvm, "0x%08X | umac interruptlink1\n", table.ilink1);
483 	IWL_ERR(mvm, "0x%08X | umac interruptlink2\n", table.ilink2);
484 	IWL_ERR(mvm, "0x%08X | umac data1\n", table.data1);
485 	IWL_ERR(mvm, "0x%08X | umac data2\n", table.data2);
486 	IWL_ERR(mvm, "0x%08X | umac data3\n", table.data3);
487 	IWL_ERR(mvm, "0x%08X | umac major\n", table.umac_major);
488 	IWL_ERR(mvm, "0x%08X | umac minor\n", table.umac_minor);
489 	IWL_ERR(mvm, "0x%08X | frame pointer\n", table.frame_pointer);
490 	IWL_ERR(mvm, "0x%08X | stack pointer\n", table.stack_pointer);
491 	IWL_ERR(mvm, "0x%08X | last host cmd\n", table.cmd_header);
492 	IWL_ERR(mvm, "0x%08X | isr status reg\n", table.nic_isr_pref);
493 }
494 
495 static void iwl_mvm_dump_lmac_error_log(struct iwl_mvm *mvm, u8 lmac_num)
496 {
497 	struct iwl_trans *trans = mvm->trans;
498 	struct iwl_error_event_table table;
499 	u32 val, base = mvm->trans->lmac_error_event_table[lmac_num];
500 
501 	if (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT) {
502 		if (!base)
503 			base = mvm->fw->init_errlog_ptr;
504 	} else {
505 		if (!base)
506 			base = mvm->fw->inst_errlog_ptr;
507 	}
508 
509 	if (base < 0x400000) {
510 		IWL_ERR(mvm,
511 			"Not valid error log pointer 0x%08X for %s uCode\n",
512 			base,
513 			(mvm->fwrt.cur_fw_img == IWL_UCODE_INIT)
514 			? "Init" : "RT");
515 		return;
516 	}
517 
518 	/* check if there is a HW error */
519 	val = iwl_trans_read_mem32(trans, base);
520 	if (((val & ~0xf) == 0xa5a5a5a0) || ((val & ~0xf) == 0x5a5a5a50)) {
521 		int err;
522 
523 		IWL_ERR(trans, "HW error, resetting before reading\n");
524 
525 		/* reset the device */
526 		iwl_trans_sw_reset(trans);
527 
528 		err = iwl_finish_nic_init(trans);
529 		if (err)
530 			return;
531 	}
532 
533 	iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
534 
535 	if (table.valid)
536 		mvm->fwrt.dump.lmac_err_id[lmac_num] = table.error_id;
537 
538 	if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
539 		IWL_ERR(trans, "Start IWL Error Log Dump:\n");
540 		IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
541 			mvm->status, table.valid);
542 	}
543 
544 	/* Do not change this output - scripts rely on it */
545 
546 	IWL_ERR(mvm, "Loaded firmware version: %s\n", mvm->fw->fw_version);
547 
548 	IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
549 		desc_lookup(table.error_id));
550 	IWL_ERR(mvm, "0x%08X | trm_hw_status0\n", table.trm_hw_status0);
551 	IWL_ERR(mvm, "0x%08X | trm_hw_status1\n", table.trm_hw_status1);
552 	IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
553 	IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
554 	IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
555 	IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
556 	IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
557 	IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
558 	IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
559 	IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
560 	IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
561 	IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
562 	IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
563 	IWL_ERR(mvm, "0x%08X | uCode revision type\n", table.fw_rev_type);
564 	IWL_ERR(mvm, "0x%08X | uCode version major\n", table.major);
565 	IWL_ERR(mvm, "0x%08X | uCode version minor\n", table.minor);
566 	IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
567 	IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
568 	IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
569 	IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
570 	IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
571 	IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
572 	IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
573 	IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
574 	IWL_ERR(mvm, "0x%08X | last cmd Id\n", table.last_cmd_id);
575 	IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
576 	IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
577 	IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
578 	IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
579 	IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
580 	IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
581 	IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
582 	IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
583 }
584 
585 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
586 {
587 	if (!test_bit(STATUS_DEVICE_ENABLED, &mvm->trans->status)) {
588 		IWL_ERR(mvm,
589 			"DEVICE_ENABLED bit is not set. Aborting dump.\n");
590 		return;
591 	}
592 
593 	iwl_mvm_dump_lmac_error_log(mvm, 0);
594 
595 	if (mvm->trans->lmac_error_event_table[1])
596 		iwl_mvm_dump_lmac_error_log(mvm, 1);
597 
598 	iwl_mvm_dump_umac_error_log(mvm);
599 }
600 
601 int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
602 			 int tid, int frame_limit, u16 ssn)
603 {
604 	struct iwl_scd_txq_cfg_cmd cmd = {
605 		.scd_queue = queue,
606 		.action = SCD_CFG_ENABLE_QUEUE,
607 		.window = frame_limit,
608 		.sta_id = sta_id,
609 		.ssn = cpu_to_le16(ssn),
610 		.tx_fifo = fifo,
611 		.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
612 			      queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
613 		.tid = tid,
614 	};
615 	int ret;
616 
617 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
618 		return -EINVAL;
619 
620 	if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
621 		 "Trying to reconfig unallocated queue %d\n", queue))
622 		return -ENXIO;
623 
624 	IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
625 
626 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
627 	WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
628 		  queue, fifo, ret);
629 
630 	return ret;
631 }
632 
633 /**
634  * iwl_mvm_send_lq_cmd() - Send link quality command
635  * @sync: This command can be sent synchronously.
636  *
637  * The link quality command is sent as the last step of station creation.
638  * This is the special case in which init is set and we call a callback in
639  * this case to clear the state indicating that station creation is in
640  * progress.
641  */
642 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool sync)
643 {
644 	struct iwl_host_cmd cmd = {
645 		.id = LQ_CMD,
646 		.len = { sizeof(struct iwl_lq_cmd), },
647 		.flags = sync ? 0 : CMD_ASYNC,
648 		.data = { lq, },
649 	};
650 
651 	if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
652 		    iwl_mvm_has_tlc_offload(mvm)))
653 		return -EINVAL;
654 
655 	return iwl_mvm_send_cmd(mvm, &cmd);
656 }
657 
658 /**
659  * iwl_mvm_update_smps - Get a request to change the SMPS mode
660  * @req_type: The part of the driver who call for a change.
661  * @smps_requests: The request to change the SMPS mode.
662  *
663  * Get a requst to change the SMPS mode,
664  * and change it according to all other requests in the driver.
665  */
666 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
667 			 enum iwl_mvm_smps_type_request req_type,
668 			 enum ieee80211_smps_mode smps_request)
669 {
670 	struct iwl_mvm_vif *mvmvif;
671 	enum ieee80211_smps_mode smps_mode;
672 	int i;
673 
674 	lockdep_assert_held(&mvm->mutex);
675 
676 	/* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
677 	if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
678 		return;
679 
680 	if (vif->type == NL80211_IFTYPE_AP)
681 		smps_mode = IEEE80211_SMPS_OFF;
682 	else
683 		smps_mode = IEEE80211_SMPS_AUTOMATIC;
684 
685 	mvmvif = iwl_mvm_vif_from_mac80211(vif);
686 	mvmvif->smps_requests[req_type] = smps_request;
687 	for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
688 		if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
689 			smps_mode = IEEE80211_SMPS_STATIC;
690 			break;
691 		}
692 		if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
693 			smps_mode = IEEE80211_SMPS_DYNAMIC;
694 	}
695 
696 	ieee80211_request_smps(vif, smps_mode);
697 }
698 
699 int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
700 {
701 	struct iwl_statistics_cmd scmd = {
702 		.flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
703 	};
704 	struct iwl_host_cmd cmd = {
705 		.id = STATISTICS_CMD,
706 		.len[0] = sizeof(scmd),
707 		.data[0] = &scmd,
708 		.flags = CMD_WANT_SKB,
709 	};
710 	int ret;
711 
712 	ret = iwl_mvm_send_cmd(mvm, &cmd);
713 	if (ret)
714 		return ret;
715 
716 	iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
717 	iwl_free_resp(&cmd);
718 
719 	if (clear)
720 		iwl_mvm_accu_radio_stats(mvm);
721 
722 	return 0;
723 }
724 
725 void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
726 {
727 	mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
728 	mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
729 	mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
730 	mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
731 }
732 
733 static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
734 				   struct ieee80211_vif *vif)
735 {
736 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
737 	bool *result = _data;
738 	int i;
739 
740 	for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
741 		if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
742 		    mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
743 			*result = false;
744 	}
745 }
746 
747 bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
748 {
749 	bool result = true;
750 
751 	lockdep_assert_held(&mvm->mutex);
752 
753 	if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
754 		return false;
755 
756 	if (mvm->cfg->rx_with_siso_diversity)
757 		return false;
758 
759 	ieee80211_iterate_active_interfaces_atomic(
760 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
761 			iwl_mvm_diversity_iter, &result);
762 
763 	return result;
764 }
765 
766 void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
767 				  bool low_latency, u16 mac_id)
768 {
769 	struct iwl_mac_low_latency_cmd cmd = {
770 		.mac_id = cpu_to_le32(mac_id)
771 	};
772 
773 	if (!fw_has_capa(&mvm->fw->ucode_capa,
774 			 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
775 		return;
776 
777 	if (low_latency) {
778 		/* currently we don't care about the direction */
779 		cmd.low_latency_rx = 1;
780 		cmd.low_latency_tx = 1;
781 	}
782 
783 	if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(LOW_LATENCY_CMD,
784 						 MAC_CONF_GROUP, 0),
785 				 0, sizeof(cmd), &cmd))
786 		IWL_ERR(mvm, "Failed to send low latency command\n");
787 }
788 
789 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
790 			       bool low_latency,
791 			       enum iwl_mvm_low_latency_cause cause)
792 {
793 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
794 	int res;
795 	bool prev;
796 
797 	lockdep_assert_held(&mvm->mutex);
798 
799 	prev = iwl_mvm_vif_low_latency(mvmvif);
800 	iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
801 
802 	low_latency = iwl_mvm_vif_low_latency(mvmvif);
803 
804 	if (low_latency == prev)
805 		return 0;
806 
807 	iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
808 
809 	res = iwl_mvm_update_quotas(mvm, false, NULL);
810 	if (res)
811 		return res;
812 
813 	iwl_mvm_bt_coex_vif_change(mvm);
814 
815 	return iwl_mvm_power_update_mac(mvm);
816 }
817 
818 struct iwl_mvm_low_latency_iter {
819 	bool result;
820 	bool result_per_band[NUM_NL80211_BANDS];
821 };
822 
823 static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
824 {
825 	struct iwl_mvm_low_latency_iter *result = _data;
826 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
827 	enum nl80211_band band;
828 
829 	if (iwl_mvm_vif_low_latency(mvmvif)) {
830 		result->result = true;
831 
832 		if (!mvmvif->phy_ctxt)
833 			return;
834 
835 		band = mvmvif->phy_ctxt->channel->band;
836 		result->result_per_band[band] = true;
837 	}
838 }
839 
840 bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
841 {
842 	struct iwl_mvm_low_latency_iter data = {};
843 
844 	ieee80211_iterate_active_interfaces_atomic(
845 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
846 			iwl_mvm_ll_iter, &data);
847 
848 	return data.result;
849 }
850 
851 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
852 {
853 	struct iwl_mvm_low_latency_iter data = {};
854 
855 	ieee80211_iterate_active_interfaces_atomic(
856 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
857 			iwl_mvm_ll_iter, &data);
858 
859 	return data.result_per_band[band];
860 }
861 
862 struct iwl_bss_iter_data {
863 	struct ieee80211_vif *vif;
864 	bool error;
865 };
866 
867 static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
868 				       struct ieee80211_vif *vif)
869 {
870 	struct iwl_bss_iter_data *data = _data;
871 
872 	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
873 		return;
874 
875 	if (data->vif) {
876 		data->error = true;
877 		return;
878 	}
879 
880 	data->vif = vif;
881 }
882 
883 struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
884 {
885 	struct iwl_bss_iter_data bss_iter_data = {};
886 
887 	ieee80211_iterate_active_interfaces_atomic(
888 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
889 		iwl_mvm_bss_iface_iterator, &bss_iter_data);
890 
891 	if (bss_iter_data.error) {
892 		IWL_ERR(mvm, "More than one managed interface active!\n");
893 		return ERR_PTR(-EINVAL);
894 	}
895 
896 	return bss_iter_data.vif;
897 }
898 
899 struct iwl_sta_iter_data {
900 	bool assoc;
901 };
902 
903 static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
904 				       struct ieee80211_vif *vif)
905 {
906 	struct iwl_sta_iter_data *data = _data;
907 
908 	if (vif->type != NL80211_IFTYPE_STATION)
909 		return;
910 
911 	if (vif->bss_conf.assoc)
912 		data->assoc = true;
913 }
914 
915 bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
916 {
917 	struct iwl_sta_iter_data data = {
918 		.assoc = false,
919 	};
920 
921 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
922 						   IEEE80211_IFACE_ITER_NORMAL,
923 						   iwl_mvm_sta_iface_iterator,
924 						   &data);
925 	return data.assoc;
926 }
927 
928 unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
929 				    struct ieee80211_vif *vif,
930 				    bool tdls, bool cmd_q)
931 {
932 	struct iwl_fw_dbg_trigger_tlv *trigger;
933 	struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
934 	unsigned int default_timeout =
935 		cmd_q ? IWL_DEF_WD_TIMEOUT : mvm->cfg->base_params->wd_timeout;
936 
937 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
938 		/*
939 		 * We can't know when the station is asleep or awake, so we
940 		 * must disable the queue hang detection.
941 		 */
942 		if (fw_has_capa(&mvm->fw->ucode_capa,
943 				IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
944 		    vif && vif->type == NL80211_IFTYPE_AP)
945 			return IWL_WATCHDOG_DISABLED;
946 		return iwlmvm_mod_params.tfd_q_hang_detect ?
947 			default_timeout : IWL_WATCHDOG_DISABLED;
948 	}
949 
950 	trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
951 	txq_timer = (void *)trigger->data;
952 
953 	if (tdls)
954 		return le32_to_cpu(txq_timer->tdls);
955 
956 	if (cmd_q)
957 		return le32_to_cpu(txq_timer->command_queue);
958 
959 	if (WARN_ON(!vif))
960 		return default_timeout;
961 
962 	switch (ieee80211_vif_type_p2p(vif)) {
963 	case NL80211_IFTYPE_ADHOC:
964 		return le32_to_cpu(txq_timer->ibss);
965 	case NL80211_IFTYPE_STATION:
966 		return le32_to_cpu(txq_timer->bss);
967 	case NL80211_IFTYPE_AP:
968 		return le32_to_cpu(txq_timer->softap);
969 	case NL80211_IFTYPE_P2P_CLIENT:
970 		return le32_to_cpu(txq_timer->p2p_client);
971 	case NL80211_IFTYPE_P2P_GO:
972 		return le32_to_cpu(txq_timer->p2p_go);
973 	case NL80211_IFTYPE_P2P_DEVICE:
974 		return le32_to_cpu(txq_timer->p2p_device);
975 	case NL80211_IFTYPE_MONITOR:
976 		return default_timeout;
977 	default:
978 		WARN_ON(1);
979 		return mvm->cfg->base_params->wd_timeout;
980 	}
981 }
982 
983 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
984 			     const char *errmsg)
985 {
986 	struct iwl_fw_dbg_trigger_tlv *trig;
987 	struct iwl_fw_dbg_trigger_mlme *trig_mlme;
988 
989 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
990 				     FW_DBG_TRIGGER_MLME);
991 	if (!trig)
992 		goto out;
993 
994 	trig_mlme = (void *)trig->data;
995 
996 	if (trig_mlme->stop_connection_loss &&
997 	    --trig_mlme->stop_connection_loss)
998 		goto out;
999 
1000 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
1001 
1002 out:
1003 	ieee80211_connection_loss(vif);
1004 }
1005 
1006 void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
1007 					  struct ieee80211_vif *vif,
1008 					  const struct ieee80211_sta *sta,
1009 					  u16 tid)
1010 {
1011 	struct iwl_fw_dbg_trigger_tlv *trig;
1012 	struct iwl_fw_dbg_trigger_ba *ba_trig;
1013 
1014 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
1015 				     FW_DBG_TRIGGER_BA);
1016 	if (!trig)
1017 		return;
1018 
1019 	ba_trig = (void *)trig->data;
1020 
1021 	if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
1022 		return;
1023 
1024 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1025 				"Frame from %pM timed out, tid %d",
1026 				sta->addr, tid);
1027 }
1028 
1029 u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
1030 {
1031 	if (!elapsed)
1032 		return 0;
1033 
1034 	return (100 * airtime / elapsed) / USEC_PER_MSEC;
1035 }
1036 
1037 static enum iwl_mvm_traffic_load
1038 iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
1039 {
1040 	u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
1041 
1042 	if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
1043 		return IWL_MVM_TRAFFIC_HIGH;
1044 	if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
1045 		return IWL_MVM_TRAFFIC_MEDIUM;
1046 
1047 	return IWL_MVM_TRAFFIC_LOW;
1048 }
1049 
1050 struct iwl_mvm_tcm_iter_data {
1051 	struct iwl_mvm *mvm;
1052 	bool any_sent;
1053 };
1054 
1055 static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
1056 {
1057 	struct iwl_mvm_tcm_iter_data *data = _data;
1058 	struct iwl_mvm *mvm = data->mvm;
1059 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1060 	bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
1061 
1062 	if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
1063 		return;
1064 
1065 	low_latency = mvm->tcm.result.low_latency[mvmvif->id];
1066 
1067 	if (!mvm->tcm.result.change[mvmvif->id] &&
1068 	    prev == low_latency) {
1069 		iwl_mvm_update_quotas(mvm, false, NULL);
1070 		return;
1071 	}
1072 
1073 	if (prev != low_latency) {
1074 		/* this sends traffic load and updates quota as well */
1075 		iwl_mvm_update_low_latency(mvm, vif, low_latency,
1076 					   LOW_LATENCY_TRAFFIC);
1077 	} else {
1078 		iwl_mvm_update_quotas(mvm, false, NULL);
1079 	}
1080 
1081 	data->any_sent = true;
1082 }
1083 
1084 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
1085 {
1086 	struct iwl_mvm_tcm_iter_data data = {
1087 		.mvm = mvm,
1088 		.any_sent = false,
1089 	};
1090 
1091 	mutex_lock(&mvm->mutex);
1092 
1093 	ieee80211_iterate_active_interfaces(
1094 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1095 		iwl_mvm_tcm_iter, &data);
1096 
1097 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1098 		iwl_mvm_config_scan(mvm);
1099 
1100 	mutex_unlock(&mvm->mutex);
1101 }
1102 
1103 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
1104 {
1105 	struct iwl_mvm *mvm;
1106 	struct iwl_mvm_vif *mvmvif;
1107 	struct ieee80211_vif *vif;
1108 
1109 	mvmvif = container_of(wk, struct iwl_mvm_vif,
1110 			      uapsd_nonagg_detected_wk.work);
1111 	vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
1112 	mvm = mvmvif->mvm;
1113 
1114 	if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
1115 		return;
1116 
1117 	/* remember that this AP is broken */
1118 	memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
1119 	       vif->bss_conf.bssid, ETH_ALEN);
1120 	mvm->uapsd_noagg_bssid_write_idx++;
1121 	if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
1122 		mvm->uapsd_noagg_bssid_write_idx = 0;
1123 
1124 	iwl_mvm_connection_loss(mvm, vif,
1125 				"AP isn't using AMPDU with uAPSD enabled");
1126 }
1127 
1128 static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
1129 					 struct ieee80211_vif *vif)
1130 {
1131 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1132 
1133 	if (vif->type != NL80211_IFTYPE_STATION)
1134 		return;
1135 
1136 	if (!vif->bss_conf.assoc)
1137 		return;
1138 
1139 	if (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
1140 	    !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
1141 	    !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
1142 	    !mvmvif->queue_params[IEEE80211_AC_BK].uapsd)
1143 		return;
1144 
1145 	if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
1146 		return;
1147 
1148 	mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
1149 	IWL_INFO(mvm,
1150 		 "detected AP should do aggregation but isn't, likely due to U-APSD\n");
1151 	schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk, 15 * HZ);
1152 }
1153 
1154 static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
1155 						 unsigned int elapsed,
1156 						 int mac)
1157 {
1158 	u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
1159 	u64 tpt;
1160 	unsigned long rate;
1161 	struct ieee80211_vif *vif;
1162 
1163 	rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
1164 
1165 	if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
1166 	    mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
1167 		return;
1168 
1169 	if (iwl_mvm_has_new_rx_api(mvm)) {
1170 		tpt = 8 * bytes; /* kbps */
1171 		do_div(tpt, elapsed);
1172 		rate *= 1000; /* kbps */
1173 		if (tpt < 22 * rate / 100)
1174 			return;
1175 	} else {
1176 		/*
1177 		 * the rate here is actually the threshold, in 100Kbps units,
1178 		 * so do the needed conversion from bytes to 100Kbps:
1179 		 * 100kb = bits / (100 * 1000),
1180 		 * 100kbps = 100kb / (msecs / 1000) ==
1181 		 *           (bits / (100 * 1000)) / (msecs / 1000) ==
1182 		 *           bits / (100 * msecs)
1183 		 */
1184 		tpt = (8 * bytes);
1185 		do_div(tpt, elapsed * 100);
1186 		if (tpt < rate)
1187 			return;
1188 	}
1189 
1190 	rcu_read_lock();
1191 	vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
1192 	if (vif)
1193 		iwl_mvm_uapsd_agg_disconnect(mvm, vif);
1194 	rcu_read_unlock();
1195 }
1196 
1197 static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
1198 				 struct ieee80211_vif *vif)
1199 {
1200 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1201 	u32 *band = _data;
1202 
1203 	if (!mvmvif->phy_ctxt)
1204 		return;
1205 
1206 	band[mvmvif->id] = mvmvif->phy_ctxt->channel->band;
1207 }
1208 
1209 static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
1210 					    unsigned long ts,
1211 					    bool handle_uapsd)
1212 {
1213 	unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
1214 	unsigned int uapsd_elapsed =
1215 		jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
1216 	u32 total_airtime = 0;
1217 	u32 band_airtime[NUM_NL80211_BANDS] = {0};
1218 	u32 band[NUM_MAC_INDEX_DRIVER] = {0};
1219 	int ac, mac, i;
1220 	bool low_latency = false;
1221 	enum iwl_mvm_traffic_load load, band_load;
1222 	bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
1223 
1224 	if (handle_ll)
1225 		mvm->tcm.ll_ts = ts;
1226 	if (handle_uapsd)
1227 		mvm->tcm.uapsd_nonagg_ts = ts;
1228 
1229 	mvm->tcm.result.elapsed = elapsed;
1230 
1231 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1232 						   IEEE80211_IFACE_ITER_NORMAL,
1233 						   iwl_mvm_tcm_iterator,
1234 						   &band);
1235 
1236 	for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1237 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1238 		u32 vo_vi_pkts = 0;
1239 		u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
1240 
1241 		total_airtime += airtime;
1242 		band_airtime[band[mac]] += airtime;
1243 
1244 		load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
1245 		mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
1246 		mvm->tcm.result.load[mac] = load;
1247 		mvm->tcm.result.airtime[mac] = airtime;
1248 
1249 		for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
1250 			vo_vi_pkts += mdata->rx.pkts[ac] +
1251 				      mdata->tx.pkts[ac];
1252 
1253 		/* enable immediately with enough packets but defer disabling */
1254 		if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
1255 			mvm->tcm.result.low_latency[mac] = true;
1256 		else if (handle_ll)
1257 			mvm->tcm.result.low_latency[mac] = false;
1258 
1259 		if (handle_ll) {
1260 			/* clear old data */
1261 			memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1262 			memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1263 		}
1264 		low_latency |= mvm->tcm.result.low_latency[mac];
1265 
1266 		if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
1267 			iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
1268 							     mac);
1269 		/* clear old data */
1270 		if (handle_uapsd)
1271 			mdata->uapsd_nonagg_detect.rx_bytes = 0;
1272 		memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1273 		memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1274 	}
1275 
1276 	load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
1277 	mvm->tcm.result.global_change = load != mvm->tcm.result.global_load;
1278 	mvm->tcm.result.global_load = load;
1279 
1280 	for (i = 0; i < NUM_NL80211_BANDS; i++) {
1281 		band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
1282 		mvm->tcm.result.band_load[i] = band_load;
1283 	}
1284 
1285 	/*
1286 	 * If the current load isn't low we need to force re-evaluation
1287 	 * in the TCM period, so that we can return to low load if there
1288 	 * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1289 	 * triggered by traffic).
1290 	 */
1291 	if (load != IWL_MVM_TRAFFIC_LOW)
1292 		return MVM_TCM_PERIOD;
1293 	/*
1294 	 * If low-latency is active we need to force re-evaluation after
1295 	 * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1296 	 * when there's no traffic at all.
1297 	 */
1298 	if (low_latency)
1299 		return MVM_LL_PERIOD;
1300 	/*
1301 	 * Otherwise, we don't need to run the work struct because we're
1302 	 * in the default "idle" state - traffic indication is low (which
1303 	 * also covers the "no traffic" case) and low-latency is disabled
1304 	 * so there's no state that may need to be disabled when there's
1305 	 * no traffic at all.
1306 	 *
1307 	 * Note that this has no impact on the regular scheduling of the
1308 	 * updates triggered by traffic - those happen whenever one of the
1309 	 * two timeouts expire (if there's traffic at all.)
1310 	 */
1311 	return 0;
1312 }
1313 
1314 void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1315 {
1316 	unsigned long ts = jiffies;
1317 	bool handle_uapsd =
1318 		time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1319 			       msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1320 
1321 	spin_lock(&mvm->tcm.lock);
1322 	if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1323 		spin_unlock(&mvm->tcm.lock);
1324 		return;
1325 	}
1326 	spin_unlock(&mvm->tcm.lock);
1327 
1328 	if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1329 		mutex_lock(&mvm->mutex);
1330 		if (iwl_mvm_request_statistics(mvm, true))
1331 			handle_uapsd = false;
1332 		mutex_unlock(&mvm->mutex);
1333 	}
1334 
1335 	spin_lock(&mvm->tcm.lock);
1336 	/* re-check if somebody else won the recheck race */
1337 	if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1338 		/* calculate statistics */
1339 		unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1340 								  handle_uapsd);
1341 
1342 		/* the memset needs to be visible before the timestamp */
1343 		smp_mb();
1344 		mvm->tcm.ts = ts;
1345 		if (work_delay)
1346 			schedule_delayed_work(&mvm->tcm.work, work_delay);
1347 	}
1348 	spin_unlock(&mvm->tcm.lock);
1349 
1350 	iwl_mvm_tcm_results(mvm);
1351 }
1352 
1353 void iwl_mvm_tcm_work(struct work_struct *work)
1354 {
1355 	struct delayed_work *delayed_work = to_delayed_work(work);
1356 	struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1357 					   tcm.work);
1358 
1359 	iwl_mvm_recalc_tcm(mvm);
1360 }
1361 
1362 void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1363 {
1364 	spin_lock_bh(&mvm->tcm.lock);
1365 	mvm->tcm.paused = true;
1366 	spin_unlock_bh(&mvm->tcm.lock);
1367 	if (with_cancel)
1368 		cancel_delayed_work_sync(&mvm->tcm.work);
1369 }
1370 
1371 void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1372 {
1373 	int mac;
1374 	bool low_latency = false;
1375 
1376 	spin_lock_bh(&mvm->tcm.lock);
1377 	mvm->tcm.ts = jiffies;
1378 	mvm->tcm.ll_ts = jiffies;
1379 	for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1380 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1381 
1382 		memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1383 		memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1384 		memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1385 		memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1386 
1387 		if (mvm->tcm.result.low_latency[mac])
1388 			low_latency = true;
1389 	}
1390 	/* The TCM data needs to be reset before "paused" flag changes */
1391 	smp_mb();
1392 	mvm->tcm.paused = false;
1393 
1394 	/*
1395 	 * if the current load is not low or low latency is active, force
1396 	 * re-evaluation to cover the case of no traffic.
1397 	 */
1398 	if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1399 		schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1400 	else if (low_latency)
1401 		schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1402 
1403 	spin_unlock_bh(&mvm->tcm.lock);
1404 }
1405 
1406 void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1407 {
1408 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1409 
1410 	INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1411 			  iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1412 }
1413 
1414 void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1415 {
1416 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1417 
1418 	cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1419 }
1420 
1421 u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1422 {
1423 	u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1424 
1425 	if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1426 	    mvm->trans->cfg->gp2_reg_addr)
1427 		reg_addr = mvm->trans->cfg->gp2_reg_addr;
1428 
1429 	return iwl_read_prph(mvm->trans, reg_addr);
1430 }
1431 
1432 void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
1433 {
1434 	bool ps_disabled;
1435 
1436 	lockdep_assert_held(&mvm->mutex);
1437 
1438 	/* Disable power save when reading GP2 */
1439 	ps_disabled = mvm->ps_disabled;
1440 	if (!ps_disabled) {
1441 		mvm->ps_disabled = true;
1442 		iwl_mvm_power_update_device(mvm);
1443 	}
1444 
1445 	*gp2 = iwl_mvm_get_systime(mvm);
1446 	*boottime = ktime_get_boot_ns();
1447 
1448 	if (!ps_disabled) {
1449 		mvm->ps_disabled = ps_disabled;
1450 		iwl_mvm_power_update_device(mvm);
1451 	}
1452 }
1453