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06c16d89 JK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (C) 2021, Intel Corporation. */ | |
3 | ||
4 | #include "ice.h" | |
5 | #include "ice_lib.h" | |
6 | ||
ea9b847c JK |
7 | /** |
8 | * ice_set_tx_tstamp - Enable or disable Tx timestamping | |
9 | * @pf: The PF pointer to search in | |
10 | * @on: bool value for whether timestamps are enabled or disabled | |
11 | */ | |
12 | static void ice_set_tx_tstamp(struct ice_pf *pf, bool on) | |
13 | { | |
14 | struct ice_vsi *vsi; | |
15 | u32 val; | |
16 | u16 i; | |
17 | ||
18 | vsi = ice_get_main_vsi(pf); | |
19 | if (!vsi) | |
20 | return; | |
21 | ||
22 | /* Set the timestamp enable flag for all the Tx rings */ | |
23 | ice_for_each_rxq(vsi, i) { | |
24 | if (!vsi->tx_rings[i]) | |
25 | continue; | |
26 | vsi->tx_rings[i]->ptp_tx = on; | |
27 | } | |
28 | ||
29 | /* Configure the Tx timestamp interrupt */ | |
30 | val = rd32(&pf->hw, PFINT_OICR_ENA); | |
31 | if (on) | |
32 | val |= PFINT_OICR_TSYN_TX_M; | |
33 | else | |
34 | val &= ~PFINT_OICR_TSYN_TX_M; | |
35 | wr32(&pf->hw, PFINT_OICR_ENA, val); | |
36 | } | |
37 | ||
77a78115 JK |
38 | /** |
39 | * ice_set_rx_tstamp - Enable or disable Rx timestamping | |
40 | * @pf: The PF pointer to search in | |
41 | * @on: bool value for whether timestamps are enabled or disabled | |
42 | */ | |
43 | static void ice_set_rx_tstamp(struct ice_pf *pf, bool on) | |
44 | { | |
45 | struct ice_vsi *vsi; | |
46 | u16 i; | |
47 | ||
48 | vsi = ice_get_main_vsi(pf); | |
49 | if (!vsi) | |
50 | return; | |
51 | ||
52 | /* Set the timestamp flag for all the Rx rings */ | |
53 | ice_for_each_rxq(vsi, i) { | |
54 | if (!vsi->rx_rings[i]) | |
55 | continue; | |
56 | vsi->rx_rings[i]->ptp_rx = on; | |
57 | } | |
58 | } | |
59 | ||
60 | /** | |
61 | * ice_ptp_cfg_timestamp - Configure timestamp for init/deinit | |
62 | * @pf: Board private structure | |
63 | * @ena: bool value to enable or disable time stamp | |
64 | * | |
65 | * This function will configure timestamping during PTP initialization | |
66 | * and deinitialization | |
67 | */ | |
68 | static void ice_ptp_cfg_timestamp(struct ice_pf *pf, bool ena) | |
69 | { | |
ea9b847c | 70 | ice_set_tx_tstamp(pf, ena); |
77a78115 JK |
71 | ice_set_rx_tstamp(pf, ena); |
72 | ||
ea9b847c | 73 | if (ena) { |
77a78115 | 74 | pf->ptp.tstamp_config.rx_filter = HWTSTAMP_FILTER_ALL; |
ea9b847c JK |
75 | pf->ptp.tstamp_config.tx_type = HWTSTAMP_TX_ON; |
76 | } else { | |
77a78115 | 77 | pf->ptp.tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; |
ea9b847c JK |
78 | pf->ptp.tstamp_config.tx_type = HWTSTAMP_TX_OFF; |
79 | } | |
77a78115 JK |
80 | } |
81 | ||
67569a7f JK |
82 | /** |
83 | * ice_get_ptp_clock_index - Get the PTP clock index | |
84 | * @pf: the PF pointer | |
85 | * | |
86 | * Determine the clock index of the PTP clock associated with this device. If | |
87 | * this is the PF controlling the clock, just use the local access to the | |
88 | * clock device pointer. | |
89 | * | |
90 | * Otherwise, read from the driver shared parameters to determine the clock | |
91 | * index value. | |
92 | * | |
93 | * Returns: the index of the PTP clock associated with this device, or -1 if | |
94 | * there is no associated clock. | |
95 | */ | |
96 | int ice_get_ptp_clock_index(struct ice_pf *pf) | |
97 | { | |
98 | struct device *dev = ice_pf_to_dev(pf); | |
99 | enum ice_aqc_driver_params param_idx; | |
100 | struct ice_hw *hw = &pf->hw; | |
101 | u8 tmr_idx; | |
102 | u32 value; | |
103 | int err; | |
104 | ||
105 | /* Use the ptp_clock structure if we're the main PF */ | |
106 | if (pf->ptp.clock) | |
107 | return ptp_clock_index(pf->ptp.clock); | |
108 | ||
109 | tmr_idx = hw->func_caps.ts_func_info.tmr_index_assoc; | |
110 | if (!tmr_idx) | |
111 | param_idx = ICE_AQC_DRIVER_PARAM_CLK_IDX_TMR0; | |
112 | else | |
113 | param_idx = ICE_AQC_DRIVER_PARAM_CLK_IDX_TMR1; | |
114 | ||
115 | err = ice_aq_get_driver_param(hw, param_idx, &value, NULL); | |
116 | if (err) { | |
117 | dev_err(dev, "Failed to read PTP clock index parameter, err %d aq_err %s\n", | |
118 | err, ice_aq_str(hw->adminq.sq_last_status)); | |
119 | return -1; | |
120 | } | |
121 | ||
122 | /* The PTP clock index is an integer, and will be between 0 and | |
123 | * INT_MAX. The highest bit of the driver shared parameter is used to | |
124 | * indicate whether or not the currently stored clock index is valid. | |
125 | */ | |
126 | if (!(value & PTP_SHARED_CLK_IDX_VALID)) | |
127 | return -1; | |
128 | ||
129 | return value & ~PTP_SHARED_CLK_IDX_VALID; | |
130 | } | |
131 | ||
132 | /** | |
133 | * ice_set_ptp_clock_index - Set the PTP clock index | |
134 | * @pf: the PF pointer | |
135 | * | |
136 | * Set the PTP clock index for this device into the shared driver parameters, | |
137 | * so that other PFs associated with this device can read it. | |
138 | * | |
139 | * If the PF is unable to store the clock index, it will log an error, but | |
140 | * will continue operating PTP. | |
141 | */ | |
142 | static void ice_set_ptp_clock_index(struct ice_pf *pf) | |
143 | { | |
144 | struct device *dev = ice_pf_to_dev(pf); | |
145 | enum ice_aqc_driver_params param_idx; | |
146 | struct ice_hw *hw = &pf->hw; | |
147 | u8 tmr_idx; | |
148 | u32 value; | |
149 | int err; | |
150 | ||
151 | if (!pf->ptp.clock) | |
152 | return; | |
153 | ||
154 | tmr_idx = hw->func_caps.ts_func_info.tmr_index_assoc; | |
155 | if (!tmr_idx) | |
156 | param_idx = ICE_AQC_DRIVER_PARAM_CLK_IDX_TMR0; | |
157 | else | |
158 | param_idx = ICE_AQC_DRIVER_PARAM_CLK_IDX_TMR1; | |
159 | ||
160 | value = (u32)ptp_clock_index(pf->ptp.clock); | |
161 | if (value > INT_MAX) { | |
162 | dev_err(dev, "PTP Clock index is too large to store\n"); | |
163 | return; | |
164 | } | |
165 | value |= PTP_SHARED_CLK_IDX_VALID; | |
166 | ||
167 | err = ice_aq_set_driver_param(hw, param_idx, value, NULL); | |
168 | if (err) { | |
169 | dev_err(dev, "Failed to set PTP clock index parameter, err %d aq_err %s\n", | |
170 | err, ice_aq_str(hw->adminq.sq_last_status)); | |
171 | } | |
172 | } | |
173 | ||
174 | /** | |
175 | * ice_clear_ptp_clock_index - Clear the PTP clock index | |
176 | * @pf: the PF pointer | |
177 | * | |
178 | * Clear the PTP clock index for this device. Must be called when | |
179 | * unregistering the PTP clock, in order to ensure other PFs stop reporting | |
180 | * a clock object that no longer exists. | |
181 | */ | |
182 | static void ice_clear_ptp_clock_index(struct ice_pf *pf) | |
183 | { | |
184 | struct device *dev = ice_pf_to_dev(pf); | |
185 | enum ice_aqc_driver_params param_idx; | |
186 | struct ice_hw *hw = &pf->hw; | |
187 | u8 tmr_idx; | |
188 | int err; | |
189 | ||
190 | /* Do not clear the index if we don't own the timer */ | |
191 | if (!hw->func_caps.ts_func_info.src_tmr_owned) | |
192 | return; | |
193 | ||
194 | tmr_idx = hw->func_caps.ts_func_info.tmr_index_assoc; | |
195 | if (!tmr_idx) | |
196 | param_idx = ICE_AQC_DRIVER_PARAM_CLK_IDX_TMR0; | |
197 | else | |
198 | param_idx = ICE_AQC_DRIVER_PARAM_CLK_IDX_TMR1; | |
199 | ||
200 | err = ice_aq_set_driver_param(hw, param_idx, 0, NULL); | |
201 | if (err) { | |
202 | dev_dbg(dev, "Failed to clear PTP clock index parameter, err %d aq_err %s\n", | |
203 | err, ice_aq_str(hw->adminq.sq_last_status)); | |
204 | } | |
205 | } | |
206 | ||
06c16d89 JK |
207 | /** |
208 | * ice_ptp_read_src_clk_reg - Read the source clock register | |
209 | * @pf: Board private structure | |
210 | * @sts: Optional parameter for holding a pair of system timestamps from | |
211 | * the system clock. Will be ignored if NULL is given. | |
212 | */ | |
213 | static u64 | |
214 | ice_ptp_read_src_clk_reg(struct ice_pf *pf, struct ptp_system_timestamp *sts) | |
215 | { | |
216 | struct ice_hw *hw = &pf->hw; | |
217 | u32 hi, lo, lo2; | |
218 | u8 tmr_idx; | |
219 | ||
220 | tmr_idx = ice_get_ptp_src_clock_index(hw); | |
221 | /* Read the system timestamp pre PHC read */ | |
222 | if (sts) | |
223 | ptp_read_system_prets(sts); | |
224 | ||
225 | lo = rd32(hw, GLTSYN_TIME_L(tmr_idx)); | |
226 | ||
227 | /* Read the system timestamp post PHC read */ | |
228 | if (sts) | |
229 | ptp_read_system_postts(sts); | |
230 | ||
231 | hi = rd32(hw, GLTSYN_TIME_H(tmr_idx)); | |
232 | lo2 = rd32(hw, GLTSYN_TIME_L(tmr_idx)); | |
233 | ||
234 | if (lo2 < lo) { | |
235 | /* if TIME_L rolled over read TIME_L again and update | |
236 | * system timestamps | |
237 | */ | |
238 | if (sts) | |
239 | ptp_read_system_prets(sts); | |
240 | lo = rd32(hw, GLTSYN_TIME_L(tmr_idx)); | |
241 | if (sts) | |
242 | ptp_read_system_postts(sts); | |
243 | hi = rd32(hw, GLTSYN_TIME_H(tmr_idx)); | |
244 | } | |
245 | ||
246 | return ((u64)hi << 32) | lo; | |
247 | } | |
248 | ||
77a78115 JK |
249 | /** |
250 | * ice_ptp_update_cached_phctime - Update the cached PHC time values | |
251 | * @pf: Board specific private structure | |
252 | * | |
253 | * This function updates the system time values which are cached in the PF | |
254 | * structure and the Rx rings. | |
255 | * | |
256 | * This function must be called periodically to ensure that the cached value | |
257 | * is never more than 2 seconds old. It must also be called whenever the PHC | |
258 | * time has been changed. | |
259 | */ | |
260 | static void ice_ptp_update_cached_phctime(struct ice_pf *pf) | |
261 | { | |
262 | u64 systime; | |
263 | int i; | |
264 | ||
265 | /* Read the current PHC time */ | |
266 | systime = ice_ptp_read_src_clk_reg(pf, NULL); | |
267 | ||
268 | /* Update the cached PHC time stored in the PF structure */ | |
269 | WRITE_ONCE(pf->ptp.cached_phc_time, systime); | |
270 | ||
271 | ice_for_each_vsi(pf, i) { | |
272 | struct ice_vsi *vsi = pf->vsi[i]; | |
273 | int j; | |
274 | ||
275 | if (!vsi) | |
276 | continue; | |
277 | ||
278 | if (vsi->type != ICE_VSI_PF) | |
279 | continue; | |
280 | ||
281 | ice_for_each_rxq(vsi, j) { | |
282 | if (!vsi->rx_rings[j]) | |
283 | continue; | |
284 | WRITE_ONCE(vsi->rx_rings[j]->cached_phctime, systime); | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | /** | |
290 | * ice_ptp_extend_32b_ts - Convert a 32b nanoseconds timestamp to 64b | |
291 | * @cached_phc_time: recently cached copy of PHC time | |
292 | * @in_tstamp: Ingress/egress 32b nanoseconds timestamp value | |
293 | * | |
294 | * Hardware captures timestamps which contain only 32 bits of nominal | |
295 | * nanoseconds, as opposed to the 64bit timestamps that the stack expects. | |
296 | * Note that the captured timestamp values may be 40 bits, but the lower | |
297 | * 8 bits are sub-nanoseconds and generally discarded. | |
298 | * | |
299 | * Extend the 32bit nanosecond timestamp using the following algorithm and | |
300 | * assumptions: | |
301 | * | |
302 | * 1) have a recently cached copy of the PHC time | |
303 | * 2) assume that the in_tstamp was captured 2^31 nanoseconds (~2.1 | |
304 | * seconds) before or after the PHC time was captured. | |
305 | * 3) calculate the delta between the cached time and the timestamp | |
306 | * 4) if the delta is smaller than 2^31 nanoseconds, then the timestamp was | |
307 | * captured after the PHC time. In this case, the full timestamp is just | |
308 | * the cached PHC time plus the delta. | |
309 | * 5) otherwise, if the delta is larger than 2^31 nanoseconds, then the | |
310 | * timestamp was captured *before* the PHC time, i.e. because the PHC | |
311 | * cache was updated after the timestamp was captured by hardware. In this | |
312 | * case, the full timestamp is the cached time minus the inverse delta. | |
313 | * | |
314 | * This algorithm works even if the PHC time was updated after a Tx timestamp | |
315 | * was requested, but before the Tx timestamp event was reported from | |
316 | * hardware. | |
317 | * | |
318 | * This calculation primarily relies on keeping the cached PHC time up to | |
319 | * date. If the timestamp was captured more than 2^31 nanoseconds after the | |
320 | * PHC time, it is possible that the lower 32bits of PHC time have | |
321 | * overflowed more than once, and we might generate an incorrect timestamp. | |
322 | * | |
323 | * This is prevented by (a) periodically updating the cached PHC time once | |
324 | * a second, and (b) discarding any Tx timestamp packet if it has waited for | |
325 | * a timestamp for more than one second. | |
326 | */ | |
327 | static u64 ice_ptp_extend_32b_ts(u64 cached_phc_time, u32 in_tstamp) | |
328 | { | |
329 | u32 delta, phc_time_lo; | |
330 | u64 ns; | |
331 | ||
332 | /* Extract the lower 32 bits of the PHC time */ | |
333 | phc_time_lo = (u32)cached_phc_time; | |
334 | ||
335 | /* Calculate the delta between the lower 32bits of the cached PHC | |
336 | * time and the in_tstamp value | |
337 | */ | |
338 | delta = (in_tstamp - phc_time_lo); | |
339 | ||
340 | /* Do not assume that the in_tstamp is always more recent than the | |
341 | * cached PHC time. If the delta is large, it indicates that the | |
342 | * in_tstamp was taken in the past, and should be converted | |
343 | * forward. | |
344 | */ | |
345 | if (delta > (U32_MAX / 2)) { | |
346 | /* reverse the delta calculation here */ | |
347 | delta = (phc_time_lo - in_tstamp); | |
348 | ns = cached_phc_time - delta; | |
349 | } else { | |
350 | ns = cached_phc_time + delta; | |
351 | } | |
352 | ||
353 | return ns; | |
354 | } | |
355 | ||
ea9b847c JK |
356 | /** |
357 | * ice_ptp_extend_40b_ts - Convert a 40b timestamp to 64b nanoseconds | |
358 | * @pf: Board private structure | |
359 | * @in_tstamp: Ingress/egress 40b timestamp value | |
360 | * | |
361 | * The Tx and Rx timestamps are 40 bits wide, including 32 bits of nominal | |
362 | * nanoseconds, 7 bits of sub-nanoseconds, and a valid bit. | |
363 | * | |
364 | * *--------------------------------------------------------------* | |
365 | * | 32 bits of nanoseconds | 7 high bits of sub ns underflow | v | | |
366 | * *--------------------------------------------------------------* | |
367 | * | |
368 | * The low bit is an indicator of whether the timestamp is valid. The next | |
369 | * 7 bits are a capture of the upper 7 bits of the sub-nanosecond underflow, | |
370 | * and the remaining 32 bits are the lower 32 bits of the PHC timer. | |
371 | * | |
372 | * It is assumed that the caller verifies the timestamp is valid prior to | |
373 | * calling this function. | |
374 | * | |
375 | * Extract the 32bit nominal nanoseconds and extend them. Use the cached PHC | |
376 | * time stored in the device private PTP structure as the basis for timestamp | |
377 | * extension. | |
378 | * | |
379 | * See ice_ptp_extend_32b_ts for a detailed explanation of the extension | |
380 | * algorithm. | |
381 | */ | |
382 | static u64 ice_ptp_extend_40b_ts(struct ice_pf *pf, u64 in_tstamp) | |
383 | { | |
384 | const u64 mask = GENMASK_ULL(31, 0); | |
385 | ||
386 | return ice_ptp_extend_32b_ts(pf->ptp.cached_phc_time, | |
387 | (in_tstamp >> 8) & mask); | |
388 | } | |
389 | ||
06c16d89 JK |
390 | /** |
391 | * ice_ptp_read_time - Read the time from the device | |
392 | * @pf: Board private structure | |
393 | * @ts: timespec structure to hold the current time value | |
394 | * @sts: Optional parameter for holding a pair of system timestamps from | |
395 | * the system clock. Will be ignored if NULL is given. | |
396 | * | |
397 | * This function reads the source clock registers and stores them in a timespec. | |
398 | * However, since the registers are 64 bits of nanoseconds, we must convert the | |
399 | * result to a timespec before we can return. | |
400 | */ | |
401 | static void | |
402 | ice_ptp_read_time(struct ice_pf *pf, struct timespec64 *ts, | |
403 | struct ptp_system_timestamp *sts) | |
404 | { | |
405 | u64 time_ns = ice_ptp_read_src_clk_reg(pf, sts); | |
406 | ||
407 | *ts = ns_to_timespec64(time_ns); | |
408 | } | |
409 | ||
410 | /** | |
411 | * ice_ptp_write_init - Set PHC time to provided value | |
412 | * @pf: Board private structure | |
413 | * @ts: timespec structure that holds the new time value | |
414 | * | |
415 | * Set the PHC time to the specified time provided in the timespec. | |
416 | */ | |
417 | static int ice_ptp_write_init(struct ice_pf *pf, struct timespec64 *ts) | |
418 | { | |
419 | u64 ns = timespec64_to_ns(ts); | |
420 | struct ice_hw *hw = &pf->hw; | |
421 | ||
422 | return ice_ptp_init_time(hw, ns); | |
423 | } | |
424 | ||
425 | /** | |
426 | * ice_ptp_write_adj - Adjust PHC clock time atomically | |
427 | * @pf: Board private structure | |
428 | * @adj: Adjustment in nanoseconds | |
429 | * | |
430 | * Perform an atomic adjustment of the PHC time by the specified number of | |
431 | * nanoseconds. | |
432 | */ | |
433 | static int ice_ptp_write_adj(struct ice_pf *pf, s32 adj) | |
434 | { | |
435 | struct ice_hw *hw = &pf->hw; | |
436 | ||
437 | return ice_ptp_adj_clock(hw, adj); | |
438 | } | |
439 | ||
440 | /** | |
441 | * ice_ptp_adjfine - Adjust clock increment rate | |
442 | * @info: the driver's PTP info structure | |
443 | * @scaled_ppm: Parts per million with 16-bit fractional field | |
444 | * | |
445 | * Adjust the frequency of the clock by the indicated scaled ppm from the | |
446 | * base frequency. | |
447 | */ | |
448 | static int ice_ptp_adjfine(struct ptp_clock_info *info, long scaled_ppm) | |
449 | { | |
450 | struct ice_pf *pf = ptp_info_to_pf(info); | |
451 | u64 freq, divisor = 1000000ULL; | |
452 | struct ice_hw *hw = &pf->hw; | |
453 | s64 incval, diff; | |
454 | int neg_adj = 0; | |
455 | int err; | |
456 | ||
457 | incval = ICE_PTP_NOMINAL_INCVAL_E810; | |
458 | ||
459 | if (scaled_ppm < 0) { | |
460 | neg_adj = 1; | |
461 | scaled_ppm = -scaled_ppm; | |
462 | } | |
463 | ||
464 | while ((u64)scaled_ppm > div_u64(U64_MAX, incval)) { | |
465 | /* handle overflow by scaling down the scaled_ppm and | |
466 | * the divisor, losing some precision | |
467 | */ | |
468 | scaled_ppm >>= 2; | |
469 | divisor >>= 2; | |
470 | } | |
471 | ||
472 | freq = (incval * (u64)scaled_ppm) >> 16; | |
473 | diff = div_u64(freq, divisor); | |
474 | ||
475 | if (neg_adj) | |
476 | incval -= diff; | |
477 | else | |
478 | incval += diff; | |
479 | ||
480 | err = ice_ptp_write_incval_locked(hw, incval); | |
481 | if (err) { | |
482 | dev_err(ice_pf_to_dev(pf), "PTP failed to set incval, err %d\n", | |
483 | err); | |
484 | return -EIO; | |
485 | } | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | /** | |
491 | * ice_ptp_gettimex64 - Get the time of the clock | |
492 | * @info: the driver's PTP info structure | |
493 | * @ts: timespec64 structure to hold the current time value | |
494 | * @sts: Optional parameter for holding a pair of system timestamps from | |
495 | * the system clock. Will be ignored if NULL is given. | |
496 | * | |
497 | * Read the device clock and return the correct value on ns, after converting it | |
498 | * into a timespec struct. | |
499 | */ | |
500 | static int | |
501 | ice_ptp_gettimex64(struct ptp_clock_info *info, struct timespec64 *ts, | |
502 | struct ptp_system_timestamp *sts) | |
503 | { | |
504 | struct ice_pf *pf = ptp_info_to_pf(info); | |
505 | struct ice_hw *hw = &pf->hw; | |
506 | ||
507 | if (!ice_ptp_lock(hw)) { | |
508 | dev_err(ice_pf_to_dev(pf), "PTP failed to get time\n"); | |
509 | return -EBUSY; | |
510 | } | |
511 | ||
512 | ice_ptp_read_time(pf, ts, sts); | |
513 | ice_ptp_unlock(hw); | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | /** | |
519 | * ice_ptp_settime64 - Set the time of the clock | |
520 | * @info: the driver's PTP info structure | |
521 | * @ts: timespec64 structure that holds the new time value | |
522 | * | |
523 | * Set the device clock to the user input value. The conversion from timespec | |
524 | * to ns happens in the write function. | |
525 | */ | |
526 | static int | |
527 | ice_ptp_settime64(struct ptp_clock_info *info, const struct timespec64 *ts) | |
528 | { | |
529 | struct ice_pf *pf = ptp_info_to_pf(info); | |
530 | struct timespec64 ts64 = *ts; | |
531 | struct ice_hw *hw = &pf->hw; | |
532 | int err; | |
533 | ||
534 | if (!ice_ptp_lock(hw)) { | |
535 | err = -EBUSY; | |
536 | goto exit; | |
537 | } | |
538 | ||
539 | err = ice_ptp_write_init(pf, &ts64); | |
540 | ice_ptp_unlock(hw); | |
541 | ||
77a78115 JK |
542 | if (!err) |
543 | ice_ptp_update_cached_phctime(pf); | |
544 | ||
06c16d89 JK |
545 | exit: |
546 | if (err) { | |
547 | dev_err(ice_pf_to_dev(pf), "PTP failed to set time %d\n", err); | |
548 | return err; | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | /** | |
555 | * ice_ptp_adjtime_nonatomic - Do a non-atomic clock adjustment | |
556 | * @info: the driver's PTP info structure | |
557 | * @delta: Offset in nanoseconds to adjust the time by | |
558 | */ | |
559 | static int ice_ptp_adjtime_nonatomic(struct ptp_clock_info *info, s64 delta) | |
560 | { | |
561 | struct timespec64 now, then; | |
562 | ||
563 | then = ns_to_timespec64(delta); | |
564 | ice_ptp_gettimex64(info, &now, NULL); | |
565 | now = timespec64_add(now, then); | |
566 | ||
567 | return ice_ptp_settime64(info, (const struct timespec64 *)&now); | |
568 | } | |
569 | ||
570 | /** | |
571 | * ice_ptp_adjtime - Adjust the time of the clock by the indicated delta | |
572 | * @info: the driver's PTP info structure | |
573 | * @delta: Offset in nanoseconds to adjust the time by | |
574 | */ | |
575 | static int ice_ptp_adjtime(struct ptp_clock_info *info, s64 delta) | |
576 | { | |
577 | struct ice_pf *pf = ptp_info_to_pf(info); | |
578 | struct ice_hw *hw = &pf->hw; | |
579 | struct device *dev; | |
580 | int err; | |
581 | ||
582 | dev = ice_pf_to_dev(pf); | |
583 | ||
584 | /* Hardware only supports atomic adjustments using signed 32-bit | |
585 | * integers. For any adjustment outside this range, perform | |
586 | * a non-atomic get->adjust->set flow. | |
587 | */ | |
588 | if (delta > S32_MAX || delta < S32_MIN) { | |
589 | dev_dbg(dev, "delta = %lld, adjtime non-atomic\n", delta); | |
590 | return ice_ptp_adjtime_nonatomic(info, delta); | |
591 | } | |
592 | ||
593 | if (!ice_ptp_lock(hw)) { | |
594 | dev_err(dev, "PTP failed to acquire semaphore in adjtime\n"); | |
595 | return -EBUSY; | |
596 | } | |
597 | ||
598 | err = ice_ptp_write_adj(pf, delta); | |
599 | ||
600 | ice_ptp_unlock(hw); | |
601 | ||
602 | if (err) { | |
603 | dev_err(dev, "PTP failed to adjust time, err %d\n", err); | |
604 | return err; | |
605 | } | |
606 | ||
77a78115 JK |
607 | ice_ptp_update_cached_phctime(pf); |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | /** | |
613 | * ice_ptp_get_ts_config - ioctl interface to read the timestamping config | |
614 | * @pf: Board private structure | |
615 | * @ifr: ioctl data | |
616 | * | |
617 | * Copy the timestamping config to user buffer | |
618 | */ | |
619 | int ice_ptp_get_ts_config(struct ice_pf *pf, struct ifreq *ifr) | |
620 | { | |
621 | struct hwtstamp_config *config; | |
622 | ||
623 | if (!test_bit(ICE_FLAG_PTP, pf->flags)) | |
624 | return -EIO; | |
625 | ||
626 | config = &pf->ptp.tstamp_config; | |
627 | ||
628 | return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? | |
629 | -EFAULT : 0; | |
630 | } | |
631 | ||
632 | /** | |
633 | * ice_ptp_set_timestamp_mode - Setup driver for requested timestamp mode | |
634 | * @pf: Board private structure | |
635 | * @config: hwtstamp settings requested or saved | |
636 | */ | |
637 | static int | |
638 | ice_ptp_set_timestamp_mode(struct ice_pf *pf, struct hwtstamp_config *config) | |
639 | { | |
640 | /* Reserved for future extensions. */ | |
641 | if (config->flags) | |
642 | return -EINVAL; | |
643 | ||
644 | switch (config->tx_type) { | |
645 | case HWTSTAMP_TX_OFF: | |
ea9b847c JK |
646 | ice_set_tx_tstamp(pf, false); |
647 | break; | |
648 | case HWTSTAMP_TX_ON: | |
649 | ice_set_tx_tstamp(pf, true); | |
77a78115 JK |
650 | break; |
651 | default: | |
652 | return -ERANGE; | |
653 | } | |
654 | ||
655 | switch (config->rx_filter) { | |
656 | case HWTSTAMP_FILTER_NONE: | |
657 | ice_set_rx_tstamp(pf, false); | |
658 | break; | |
659 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
660 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
661 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
662 | case HWTSTAMP_FILTER_PTP_V2_EVENT: | |
663 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
664 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
665 | case HWTSTAMP_FILTER_PTP_V2_SYNC: | |
666 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
667 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
668 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
669 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
670 | case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: | |
671 | case HWTSTAMP_FILTER_NTP_ALL: | |
672 | case HWTSTAMP_FILTER_ALL: | |
673 | config->rx_filter = HWTSTAMP_FILTER_ALL; | |
674 | ice_set_rx_tstamp(pf, true); | |
675 | break; | |
676 | default: | |
677 | return -ERANGE; | |
678 | } | |
679 | ||
06c16d89 JK |
680 | return 0; |
681 | } | |
682 | ||
77a78115 JK |
683 | /** |
684 | * ice_ptp_set_ts_config - ioctl interface to control the timestamping | |
685 | * @pf: Board private structure | |
686 | * @ifr: ioctl data | |
687 | * | |
688 | * Get the user config and store it | |
689 | */ | |
690 | int ice_ptp_set_ts_config(struct ice_pf *pf, struct ifreq *ifr) | |
691 | { | |
692 | struct hwtstamp_config config; | |
693 | int err; | |
694 | ||
695 | if (!test_bit(ICE_FLAG_PTP, pf->flags)) | |
696 | return -EAGAIN; | |
697 | ||
698 | if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) | |
699 | return -EFAULT; | |
700 | ||
701 | err = ice_ptp_set_timestamp_mode(pf, &config); | |
702 | if (err) | |
703 | return err; | |
704 | ||
705 | /* Save these settings for future reference */ | |
706 | pf->ptp.tstamp_config = config; | |
707 | ||
708 | return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? | |
709 | -EFAULT : 0; | |
710 | } | |
711 | ||
712 | /** | |
713 | * ice_ptp_rx_hwtstamp - Check for an Rx timestamp | |
714 | * @rx_ring: Ring to get the VSI info | |
715 | * @rx_desc: Receive descriptor | |
716 | * @skb: Particular skb to send timestamp with | |
717 | * | |
718 | * The driver receives a notification in the receive descriptor with timestamp. | |
719 | * The timestamp is in ns, so we must convert the result first. | |
720 | */ | |
721 | void | |
722 | ice_ptp_rx_hwtstamp(struct ice_ring *rx_ring, | |
723 | union ice_32b_rx_flex_desc *rx_desc, struct sk_buff *skb) | |
724 | { | |
725 | u32 ts_high; | |
726 | u64 ts_ns; | |
727 | ||
728 | /* Populate timesync data into skb */ | |
729 | if (rx_desc->wb.time_stamp_low & ICE_PTP_TS_VALID) { | |
730 | struct skb_shared_hwtstamps *hwtstamps; | |
731 | ||
732 | /* Use ice_ptp_extend_32b_ts directly, using the ring-specific | |
733 | * cached PHC value, rather than accessing the PF. This also | |
734 | * allows us to simply pass the upper 32bits of nanoseconds | |
735 | * directly. Calling ice_ptp_extend_40b_ts is unnecessary as | |
736 | * it would just discard these bits itself. | |
737 | */ | |
738 | ts_high = le32_to_cpu(rx_desc->wb.flex_ts.ts_high); | |
739 | ts_ns = ice_ptp_extend_32b_ts(rx_ring->cached_phctime, ts_high); | |
740 | ||
741 | hwtstamps = skb_hwtstamps(skb); | |
742 | memset(hwtstamps, 0, sizeof(*hwtstamps)); | |
743 | hwtstamps->hwtstamp = ns_to_ktime(ts_ns); | |
744 | } | |
745 | } | |
746 | ||
06c16d89 JK |
747 | /** |
748 | * ice_ptp_set_caps - Set PTP capabilities | |
749 | * @pf: Board private structure | |
750 | */ | |
751 | static void ice_ptp_set_caps(struct ice_pf *pf) | |
752 | { | |
753 | struct ptp_clock_info *info = &pf->ptp.info; | |
754 | struct device *dev = ice_pf_to_dev(pf); | |
755 | ||
756 | snprintf(info->name, sizeof(info->name) - 1, "%s-%s-clk", | |
757 | dev_driver_string(dev), dev_name(dev)); | |
758 | info->owner = THIS_MODULE; | |
759 | info->max_adj = 999999999; | |
760 | info->adjtime = ice_ptp_adjtime; | |
761 | info->adjfine = ice_ptp_adjfine; | |
762 | info->gettimex64 = ice_ptp_gettimex64; | |
763 | info->settime64 = ice_ptp_settime64; | |
764 | } | |
765 | ||
766 | /** | |
767 | * ice_ptp_create_clock - Create PTP clock device for userspace | |
768 | * @pf: Board private structure | |
769 | * | |
770 | * This function creates a new PTP clock device. It only creates one if we | |
771 | * don't already have one. Will return error if it can't create one, but success | |
772 | * if we already have a device. Should be used by ice_ptp_init to create clock | |
773 | * initially, and prevent global resets from creating new clock devices. | |
774 | */ | |
775 | static long ice_ptp_create_clock(struct ice_pf *pf) | |
776 | { | |
777 | struct ptp_clock_info *info; | |
778 | struct ptp_clock *clock; | |
779 | struct device *dev; | |
780 | ||
781 | /* No need to create a clock device if we already have one */ | |
782 | if (pf->ptp.clock) | |
783 | return 0; | |
784 | ||
785 | ice_ptp_set_caps(pf); | |
786 | ||
787 | info = &pf->ptp.info; | |
788 | dev = ice_pf_to_dev(pf); | |
789 | ||
790 | /* Attempt to register the clock before enabling the hardware. */ | |
791 | clock = ptp_clock_register(info, dev); | |
792 | if (IS_ERR(clock)) | |
793 | return PTR_ERR(clock); | |
794 | ||
795 | pf->ptp.clock = clock; | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
ea9b847c JK |
800 | /** |
801 | * ice_ptp_tx_tstamp_work - Process Tx timestamps for a port | |
802 | * @work: pointer to the kthread_work struct | |
803 | * | |
804 | * Process timestamps captured by the PHY associated with this port. To do | |
805 | * this, loop over each index with a waiting skb. | |
806 | * | |
807 | * If a given index has a valid timestamp, perform the following steps: | |
808 | * | |
809 | * 1) copy the timestamp out of the PHY register | |
810 | * 4) clear the timestamp valid bit in the PHY register | |
811 | * 5) unlock the index by clearing the associated in_use bit. | |
812 | * 2) extend the 40b timestamp value to get a 64bit timestamp | |
813 | * 3) send that timestamp to the stack | |
814 | * | |
815 | * After looping, if we still have waiting SKBs, then re-queue the work. This | |
816 | * may cause us effectively poll even when not strictly necessary. We do this | |
817 | * because it's possible a new timestamp was requested around the same time as | |
818 | * the interrupt. In some cases hardware might not interrupt us again when the | |
819 | * timestamp is captured. | |
820 | * | |
821 | * Note that we only take the tracking lock when clearing the bit and when | |
822 | * checking if we need to re-queue this task. The only place where bits can be | |
823 | * set is the hard xmit routine where an SKB has a request flag set. The only | |
824 | * places where we clear bits are this work function, or the periodic cleanup | |
825 | * thread. If the cleanup thread clears a bit we're processing we catch it | |
826 | * when we lock to clear the bit and then grab the SKB pointer. If a Tx thread | |
827 | * starts a new timestamp, we might not begin processing it right away but we | |
828 | * will notice it at the end when we re-queue the work item. If a Tx thread | |
829 | * starts a new timestamp just after this function exits without re-queuing, | |
830 | * the interrupt when the timestamp finishes should trigger. Avoiding holding | |
831 | * the lock for the entire function is important in order to ensure that Tx | |
832 | * threads do not get blocked while waiting for the lock. | |
833 | */ | |
834 | static void ice_ptp_tx_tstamp_work(struct kthread_work *work) | |
835 | { | |
836 | struct ice_ptp_port *ptp_port; | |
837 | struct ice_ptp_tx *tx; | |
838 | struct ice_pf *pf; | |
839 | struct ice_hw *hw; | |
840 | u8 idx; | |
841 | ||
842 | tx = container_of(work, struct ice_ptp_tx, work); | |
843 | if (!tx->init) | |
844 | return; | |
845 | ||
846 | ptp_port = container_of(tx, struct ice_ptp_port, tx); | |
847 | pf = ptp_port_to_pf(ptp_port); | |
848 | hw = &pf->hw; | |
849 | ||
850 | for_each_set_bit(idx, tx->in_use, tx->len) { | |
851 | struct skb_shared_hwtstamps shhwtstamps = {}; | |
852 | u8 phy_idx = idx + tx->quad_offset; | |
853 | u64 raw_tstamp, tstamp; | |
854 | struct sk_buff *skb; | |
855 | int err; | |
856 | ||
857 | err = ice_read_phy_tstamp(hw, tx->quad, phy_idx, | |
858 | &raw_tstamp); | |
859 | if (err) | |
860 | continue; | |
861 | ||
862 | /* Check if the timestamp is valid */ | |
863 | if (!(raw_tstamp & ICE_PTP_TS_VALID)) | |
864 | continue; | |
865 | ||
866 | /* clear the timestamp register, so that it won't show valid | |
867 | * again when re-used. | |
868 | */ | |
869 | ice_clear_phy_tstamp(hw, tx->quad, phy_idx); | |
870 | ||
871 | /* The timestamp is valid, so we'll go ahead and clear this | |
872 | * index and then send the timestamp up to the stack. | |
873 | */ | |
874 | spin_lock(&tx->lock); | |
875 | clear_bit(idx, tx->in_use); | |
876 | skb = tx->tstamps[idx].skb; | |
877 | tx->tstamps[idx].skb = NULL; | |
878 | spin_unlock(&tx->lock); | |
879 | ||
880 | /* it's (unlikely but) possible we raced with the cleanup | |
881 | * thread for discarding old timestamp requests. | |
882 | */ | |
883 | if (!skb) | |
884 | continue; | |
885 | ||
886 | /* Extend the timestamp using cached PHC time */ | |
887 | tstamp = ice_ptp_extend_40b_ts(pf, raw_tstamp); | |
888 | shhwtstamps.hwtstamp = ns_to_ktime(tstamp); | |
889 | ||
890 | skb_tstamp_tx(skb, &shhwtstamps); | |
891 | dev_kfree_skb_any(skb); | |
892 | } | |
893 | ||
894 | /* Check if we still have work to do. If so, re-queue this task to | |
895 | * poll for remaining timestamps. | |
896 | */ | |
897 | spin_lock(&tx->lock); | |
898 | if (!bitmap_empty(tx->in_use, tx->len)) | |
899 | kthread_queue_work(pf->ptp.kworker, &tx->work); | |
900 | spin_unlock(&tx->lock); | |
901 | } | |
902 | ||
903 | /** | |
904 | * ice_ptp_request_ts - Request an available Tx timestamp index | |
905 | * @tx: the PTP Tx timestamp tracker to request from | |
906 | * @skb: the SKB to associate with this timestamp request | |
907 | */ | |
908 | s8 ice_ptp_request_ts(struct ice_ptp_tx *tx, struct sk_buff *skb) | |
909 | { | |
910 | u8 idx; | |
911 | ||
912 | /* Check if this tracker is initialized */ | |
913 | if (!tx->init) | |
914 | return -1; | |
915 | ||
916 | spin_lock(&tx->lock); | |
917 | /* Find and set the first available index */ | |
918 | idx = find_first_zero_bit(tx->in_use, tx->len); | |
919 | if (idx < tx->len) { | |
920 | /* We got a valid index that no other thread could have set. Store | |
921 | * a reference to the skb and the start time to allow discarding old | |
922 | * requests. | |
923 | */ | |
924 | set_bit(idx, tx->in_use); | |
925 | tx->tstamps[idx].start = jiffies; | |
926 | tx->tstamps[idx].skb = skb_get(skb); | |
927 | skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; | |
928 | } | |
929 | ||
930 | spin_unlock(&tx->lock); | |
931 | ||
932 | /* return the appropriate PHY timestamp register index, -1 if no | |
933 | * indexes were available. | |
934 | */ | |
935 | if (idx >= tx->len) | |
936 | return -1; | |
937 | else | |
938 | return idx + tx->quad_offset; | |
939 | } | |
940 | ||
941 | /** | |
942 | * ice_ptp_process_ts - Spawn kthread work to handle timestamps | |
943 | * @pf: Board private structure | |
944 | * | |
945 | * Queue work required to process the PTP Tx timestamps outside of interrupt | |
946 | * context. | |
947 | */ | |
948 | void ice_ptp_process_ts(struct ice_pf *pf) | |
949 | { | |
950 | if (pf->ptp.port.tx.init) | |
951 | kthread_queue_work(pf->ptp.kworker, &pf->ptp.port.tx.work); | |
952 | } | |
953 | ||
954 | /** | |
955 | * ice_ptp_alloc_tx_tracker - Initialize tracking for Tx timestamps | |
956 | * @tx: Tx tracking structure to initialize | |
957 | * | |
958 | * Assumes that the length has already been initialized. Do not call directly, | |
959 | * use the ice_ptp_init_tx_e822 or ice_ptp_init_tx_e810 instead. | |
960 | */ | |
961 | static int | |
962 | ice_ptp_alloc_tx_tracker(struct ice_ptp_tx *tx) | |
963 | { | |
964 | tx->tstamps = kcalloc(tx->len, sizeof(*tx->tstamps), GFP_KERNEL); | |
965 | if (!tx->tstamps) | |
966 | return -ENOMEM; | |
967 | ||
968 | tx->in_use = bitmap_zalloc(tx->len, GFP_KERNEL); | |
969 | if (!tx->in_use) { | |
970 | kfree(tx->tstamps); | |
971 | tx->tstamps = NULL; | |
972 | return -ENOMEM; | |
973 | } | |
974 | ||
975 | spin_lock_init(&tx->lock); | |
976 | kthread_init_work(&tx->work, ice_ptp_tx_tstamp_work); | |
977 | ||
978 | tx->init = 1; | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | /** | |
984 | * ice_ptp_flush_tx_tracker - Flush any remaining timestamps from the tracker | |
985 | * @pf: Board private structure | |
986 | * @tx: the tracker to flush | |
987 | */ | |
988 | static void | |
989 | ice_ptp_flush_tx_tracker(struct ice_pf *pf, struct ice_ptp_tx *tx) | |
990 | { | |
991 | u8 idx; | |
992 | ||
993 | for (idx = 0; idx < tx->len; idx++) { | |
994 | u8 phy_idx = idx + tx->quad_offset; | |
995 | ||
996 | /* Clear any potential residual timestamp in the PHY block */ | |
997 | if (!pf->hw.reset_ongoing) | |
998 | ice_clear_phy_tstamp(&pf->hw, tx->quad, phy_idx); | |
999 | ||
1000 | if (tx->tstamps[idx].skb) { | |
1001 | dev_kfree_skb_any(tx->tstamps[idx].skb); | |
1002 | tx->tstamps[idx].skb = NULL; | |
1003 | } | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /** | |
1008 | * ice_ptp_release_tx_tracker - Release allocated memory for Tx tracker | |
1009 | * @pf: Board private structure | |
1010 | * @tx: Tx tracking structure to release | |
1011 | * | |
1012 | * Free memory associated with the Tx timestamp tracker. | |
1013 | */ | |
1014 | static void | |
1015 | ice_ptp_release_tx_tracker(struct ice_pf *pf, struct ice_ptp_tx *tx) | |
1016 | { | |
1017 | tx->init = 0; | |
1018 | ||
1019 | kthread_cancel_work_sync(&tx->work); | |
1020 | ||
1021 | ice_ptp_flush_tx_tracker(pf, tx); | |
1022 | ||
1023 | kfree(tx->tstamps); | |
1024 | tx->tstamps = NULL; | |
1025 | ||
1026 | kfree(tx->in_use); | |
1027 | tx->in_use = NULL; | |
1028 | ||
1029 | tx->len = 0; | |
1030 | } | |
1031 | ||
1032 | /** | |
1033 | * ice_ptp_init_tx_e810 - Initialize tracking for Tx timestamps | |
1034 | * @pf: Board private structure | |
1035 | * @tx: the Tx tracking structure to initialize | |
1036 | * | |
1037 | * Initialize the Tx timestamp tracker for this PF. For E810 devices, each | |
1038 | * port has its own block of timestamps, independent of the other ports. | |
1039 | */ | |
1040 | static int | |
1041 | ice_ptp_init_tx_e810(struct ice_pf *pf, struct ice_ptp_tx *tx) | |
1042 | { | |
1043 | tx->quad = pf->hw.port_info->lport; | |
1044 | tx->quad_offset = 0; | |
1045 | tx->len = INDEX_PER_QUAD; | |
1046 | ||
1047 | return ice_ptp_alloc_tx_tracker(tx); | |
1048 | } | |
1049 | ||
1050 | /** | |
1051 | * ice_ptp_tx_tstamp_cleanup - Cleanup old timestamp requests that got dropped | |
1052 | * @tx: PTP Tx tracker to clean up | |
1053 | * | |
1054 | * Loop through the Tx timestamp requests and see if any of them have been | |
1055 | * waiting for a long time. Discard any SKBs that have been waiting for more | |
1056 | * than 2 seconds. This is long enough to be reasonably sure that the | |
1057 | * timestamp will never be captured. This might happen if the packet gets | |
1058 | * discarded before it reaches the PHY timestamping block. | |
1059 | */ | |
1060 | static void ice_ptp_tx_tstamp_cleanup(struct ice_ptp_tx *tx) | |
1061 | { | |
1062 | u8 idx; | |
1063 | ||
1064 | if (!tx->init) | |
1065 | return; | |
1066 | ||
1067 | for_each_set_bit(idx, tx->in_use, tx->len) { | |
1068 | struct sk_buff *skb; | |
1069 | ||
1070 | /* Check if this SKB has been waiting for too long */ | |
1071 | if (time_is_after_jiffies(tx->tstamps[idx].start + 2 * HZ)) | |
1072 | continue; | |
1073 | ||
1074 | spin_lock(&tx->lock); | |
1075 | skb = tx->tstamps[idx].skb; | |
1076 | tx->tstamps[idx].skb = NULL; | |
1077 | clear_bit(idx, tx->in_use); | |
1078 | spin_unlock(&tx->lock); | |
1079 | ||
1080 | /* Free the SKB after we've cleared the bit */ | |
1081 | dev_kfree_skb_any(skb); | |
1082 | } | |
1083 | } | |
1084 | ||
77a78115 JK |
1085 | static void ice_ptp_periodic_work(struct kthread_work *work) |
1086 | { | |
1087 | struct ice_ptp *ptp = container_of(work, struct ice_ptp, work.work); | |
1088 | struct ice_pf *pf = container_of(ptp, struct ice_pf, ptp); | |
1089 | ||
1090 | if (!test_bit(ICE_FLAG_PTP, pf->flags)) | |
1091 | return; | |
1092 | ||
1093 | ice_ptp_update_cached_phctime(pf); | |
1094 | ||
ea9b847c JK |
1095 | ice_ptp_tx_tstamp_cleanup(&pf->ptp.port.tx); |
1096 | ||
77a78115 JK |
1097 | /* Run twice a second */ |
1098 | kthread_queue_delayed_work(ptp->kworker, &ptp->work, | |
1099 | msecs_to_jiffies(500)); | |
1100 | } | |
1101 | ||
06c16d89 JK |
1102 | /** |
1103 | * ice_ptp_init_owner - Initialize PTP_1588_CLOCK device | |
1104 | * @pf: Board private structure | |
1105 | * | |
1106 | * Setup and initialize a PTP clock device that represents the device hardware | |
1107 | * clock. Save the clock index for other functions connected to the same | |
1108 | * hardware resource. | |
1109 | */ | |
1110 | static int ice_ptp_init_owner(struct ice_pf *pf) | |
1111 | { | |
1112 | struct device *dev = ice_pf_to_dev(pf); | |
1113 | struct ice_hw *hw = &pf->hw; | |
1114 | struct timespec64 ts; | |
1115 | u8 src_idx; | |
1116 | int err; | |
1117 | ||
1118 | wr32(hw, GLTSYN_SYNC_DLAY, 0); | |
1119 | ||
1120 | /* Clear some HW residue and enable source clock */ | |
1121 | src_idx = hw->func_caps.ts_func_info.tmr_index_owned; | |
1122 | ||
1123 | /* Enable source clocks */ | |
1124 | wr32(hw, GLTSYN_ENA(src_idx), GLTSYN_ENA_TSYN_ENA_M); | |
1125 | ||
1126 | /* Enable PHY time sync */ | |
1127 | err = ice_ptp_init_phy_e810(hw); | |
1128 | if (err) | |
1129 | goto err_exit; | |
1130 | ||
1131 | /* Clear event status indications for auxiliary pins */ | |
1132 | (void)rd32(hw, GLTSYN_STAT(src_idx)); | |
1133 | ||
1134 | /* Acquire the global hardware lock */ | |
1135 | if (!ice_ptp_lock(hw)) { | |
1136 | err = -EBUSY; | |
1137 | goto err_exit; | |
1138 | } | |
1139 | ||
1140 | /* Write the increment time value to PHY and LAN */ | |
1141 | err = ice_ptp_write_incval(hw, ICE_PTP_NOMINAL_INCVAL_E810); | |
1142 | if (err) { | |
1143 | ice_ptp_unlock(hw); | |
1144 | goto err_exit; | |
1145 | } | |
1146 | ||
1147 | ts = ktime_to_timespec64(ktime_get_real()); | |
1148 | /* Write the initial Time value to PHY and LAN */ | |
1149 | err = ice_ptp_write_init(pf, &ts); | |
1150 | if (err) { | |
1151 | ice_ptp_unlock(hw); | |
1152 | goto err_exit; | |
1153 | } | |
1154 | ||
1155 | /* Release the global hardware lock */ | |
1156 | ice_ptp_unlock(hw); | |
1157 | ||
1158 | /* Ensure we have a clock device */ | |
1159 | err = ice_ptp_create_clock(pf); | |
1160 | if (err) | |
1161 | goto err_clk; | |
1162 | ||
67569a7f JK |
1163 | /* Store the PTP clock index for other PFs */ |
1164 | ice_set_ptp_clock_index(pf); | |
1165 | ||
06c16d89 JK |
1166 | return 0; |
1167 | ||
1168 | err_clk: | |
1169 | pf->ptp.clock = NULL; | |
1170 | err_exit: | |
1171 | dev_err(dev, "PTP failed to register clock, err %d\n", err); | |
1172 | ||
1173 | return err; | |
1174 | } | |
1175 | ||
1176 | /** | |
1177 | * ice_ptp_init - Initialize the PTP support after device probe or reset | |
1178 | * @pf: Board private structure | |
1179 | * | |
1180 | * This function sets device up for PTP support. The first time it is run, it | |
1181 | * will create a clock device. It does not create a clock device if one | |
1182 | * already exists. It also reconfigures the device after a reset. | |
1183 | */ | |
1184 | void ice_ptp_init(struct ice_pf *pf) | |
1185 | { | |
1186 | struct device *dev = ice_pf_to_dev(pf); | |
77a78115 | 1187 | struct kthread_worker *kworker; |
06c16d89 JK |
1188 | struct ice_hw *hw = &pf->hw; |
1189 | int err; | |
1190 | ||
1191 | /* PTP is currently only supported on E810 devices */ | |
1192 | if (!ice_is_e810(hw)) | |
1193 | return; | |
1194 | ||
1195 | /* Check if this PF owns the source timer */ | |
1196 | if (hw->func_caps.ts_func_info.src_tmr_owned) { | |
1197 | err = ice_ptp_init_owner(pf); | |
1198 | if (err) | |
1199 | return; | |
1200 | } | |
1201 | ||
77a78115 JK |
1202 | /* Disable timestamping for both Tx and Rx */ |
1203 | ice_ptp_cfg_timestamp(pf, false); | |
1204 | ||
ea9b847c JK |
1205 | /* Initialize the PTP port Tx timestamp tracker */ |
1206 | ice_ptp_init_tx_e810(pf, &pf->ptp.port.tx); | |
1207 | ||
77a78115 JK |
1208 | /* Initialize work functions */ |
1209 | kthread_init_delayed_work(&pf->ptp.work, ice_ptp_periodic_work); | |
1210 | ||
1211 | /* Allocate a kworker for handling work required for the ports | |
1212 | * connected to the PTP hardware clock. | |
1213 | */ | |
1214 | kworker = kthread_create_worker(0, "ice-ptp-%s", dev_name(dev)); | |
1215 | if (IS_ERR(kworker)) { | |
1216 | err = PTR_ERR(kworker); | |
1217 | goto err_kworker; | |
1218 | } | |
1219 | pf->ptp.kworker = kworker; | |
1220 | ||
06c16d89 JK |
1221 | set_bit(ICE_FLAG_PTP, pf->flags); |
1222 | ||
77a78115 JK |
1223 | /* Start periodic work going */ |
1224 | kthread_queue_delayed_work(pf->ptp.kworker, &pf->ptp.work, 0); | |
1225 | ||
06c16d89 | 1226 | dev_info(dev, "PTP init successful\n"); |
77a78115 JK |
1227 | return; |
1228 | ||
1229 | err_kworker: | |
1230 | /* If we registered a PTP clock, release it */ | |
1231 | if (pf->ptp.clock) { | |
1232 | ptp_clock_unregister(pf->ptp.clock); | |
1233 | pf->ptp.clock = NULL; | |
1234 | } | |
1235 | dev_err(dev, "PTP failed %d\n", err); | |
06c16d89 JK |
1236 | } |
1237 | ||
1238 | /** | |
1239 | * ice_ptp_release - Disable the driver/HW support and unregister the clock | |
1240 | * @pf: Board private structure | |
1241 | * | |
1242 | * This function handles the cleanup work required from the initialization by | |
1243 | * clearing out the important information and unregistering the clock | |
1244 | */ | |
1245 | void ice_ptp_release(struct ice_pf *pf) | |
1246 | { | |
77a78115 JK |
1247 | /* Disable timestamping for both Tx and Rx */ |
1248 | ice_ptp_cfg_timestamp(pf, false); | |
1249 | ||
ea9b847c JK |
1250 | ice_ptp_release_tx_tracker(pf, &pf->ptp.port.tx); |
1251 | ||
06c16d89 JK |
1252 | clear_bit(ICE_FLAG_PTP, pf->flags); |
1253 | ||
77a78115 JK |
1254 | kthread_cancel_delayed_work_sync(&pf->ptp.work); |
1255 | ||
1256 | if (pf->ptp.kworker) { | |
1257 | kthread_destroy_worker(pf->ptp.kworker); | |
1258 | pf->ptp.kworker = NULL; | |
1259 | } | |
1260 | ||
06c16d89 JK |
1261 | if (!pf->ptp.clock) |
1262 | return; | |
1263 | ||
67569a7f | 1264 | ice_clear_ptp_clock_index(pf); |
06c16d89 JK |
1265 | ptp_clock_unregister(pf->ptp.clock); |
1266 | pf->ptp.clock = NULL; | |
1267 | ||
1268 | dev_info(ice_pf_to_dev(pf), "Removed PTP clock\n"); | |
1269 | } |