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beb0dff1 JK |
1 | /******************************************************************************* |
2 | * | |
3 | * Intel Ethernet Controller XL710 Family Linux Driver | |
4 | * Copyright(c) 2013 - 2014 Intel Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in | |
19 | * the file called "COPYING". | |
20 | * | |
21 | * Contact Information: | |
22 | * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | ******************************************************************************/ | |
26 | ||
27 | #include "i40e.h" | |
beb0dff1 JK |
28 | #include <linux/ptp_classify.h> |
29 | ||
30 | /* The XL710 timesync is very much like Intel's 82599 design when it comes to | |
31 | * the fundamental clock design. However, the clock operations are much simpler | |
32 | * in the XL710 because the device supports a full 64 bits of nanoseconds. | |
33 | * Because the field is so wide, we can forgo the cycle counter and just | |
34 | * operate with the nanosecond field directly without fear of overflow. | |
35 | * | |
36 | * Much like the 82599, the update period is dependent upon the link speed: | |
37 | * At 40Gb link or no link, the period is 1.6ns. | |
38 | * At 10Gb link, the period is multiplied by 2. (3.2ns) | |
39 | * At 1Gb link, the period is multiplied by 20. (32ns) | |
40 | * 1588 functionality is not supported at 100Mbps. | |
41 | */ | |
42 | #define I40E_PTP_40GB_INCVAL 0x0199999999ULL | |
43 | #define I40E_PTP_10GB_INCVAL 0x0333333333ULL | |
44 | #define I40E_PTP_1GB_INCVAL 0x2000000000ULL | |
45 | ||
41a1d04b JB |
46 | #define I40E_PRTTSYN_CTL1_TSYNTYPE_V1 BIT(I40E_PRTTSYN_CTL1_TSYNTYPE_SHIFT) |
47 | #define I40E_PRTTSYN_CTL1_TSYNTYPE_V2 (2 << \ | |
beb0dff1 | 48 | I40E_PRTTSYN_CTL1_TSYNTYPE_SHIFT) |
beb0dff1 JK |
49 | |
50 | /** | |
51 | * i40e_ptp_read - Read the PHC time from the device | |
52 | * @pf: Board private structure | |
53 | * @ts: timespec structure to hold the current time value | |
54 | * | |
55 | * This function reads the PRTTSYN_TIME registers and stores them in a | |
56 | * timespec. However, since the registers are 64 bits of nanoseconds, we must | |
57 | * convert the result to a timespec before we can return. | |
58 | **/ | |
6f7a9b8a | 59 | static void i40e_ptp_read(struct i40e_pf *pf, struct timespec64 *ts) |
beb0dff1 JK |
60 | { |
61 | struct i40e_hw *hw = &pf->hw; | |
62 | u32 hi, lo; | |
63 | u64 ns; | |
64 | ||
65 | /* The timer latches on the lowest register read. */ | |
66 | lo = rd32(hw, I40E_PRTTSYN_TIME_L); | |
67 | hi = rd32(hw, I40E_PRTTSYN_TIME_H); | |
68 | ||
69 | ns = (((u64)hi) << 32) | lo; | |
70 | ||
6f7a9b8a | 71 | *ts = ns_to_timespec64(ns); |
beb0dff1 JK |
72 | } |
73 | ||
74 | /** | |
75 | * i40e_ptp_write - Write the PHC time to the device | |
76 | * @pf: Board private structure | |
77 | * @ts: timespec structure that holds the new time value | |
78 | * | |
79 | * This function writes the PRTTSYN_TIME registers with the user value. Since | |
80 | * we receive a timespec from the stack, we must convert that timespec into | |
81 | * nanoseconds before programming the registers. | |
82 | **/ | |
6f7a9b8a | 83 | static void i40e_ptp_write(struct i40e_pf *pf, const struct timespec64 *ts) |
beb0dff1 JK |
84 | { |
85 | struct i40e_hw *hw = &pf->hw; | |
6f7a9b8a | 86 | u64 ns = timespec64_to_ns(ts); |
beb0dff1 JK |
87 | |
88 | /* The timer will not update until the high register is written, so | |
89 | * write the low register first. | |
90 | */ | |
91 | wr32(hw, I40E_PRTTSYN_TIME_L, ns & 0xFFFFFFFF); | |
92 | wr32(hw, I40E_PRTTSYN_TIME_H, ns >> 32); | |
93 | } | |
94 | ||
95 | /** | |
96 | * i40e_ptp_convert_to_hwtstamp - Convert device clock to system time | |
97 | * @hwtstamps: Timestamp structure to update | |
98 | * @timestamp: Timestamp from the hardware | |
99 | * | |
100 | * We need to convert the NIC clock value into a hwtstamp which can be used by | |
101 | * the upper level timestamping functions. Since the timestamp is simply a 64- | |
102 | * bit nanosecond value, we can call ns_to_ktime directly to handle this. | |
103 | **/ | |
104 | static void i40e_ptp_convert_to_hwtstamp(struct skb_shared_hwtstamps *hwtstamps, | |
105 | u64 timestamp) | |
106 | { | |
107 | memset(hwtstamps, 0, sizeof(*hwtstamps)); | |
108 | ||
109 | hwtstamps->hwtstamp = ns_to_ktime(timestamp); | |
110 | } | |
111 | ||
112 | /** | |
113 | * i40e_ptp_adjfreq - Adjust the PHC frequency | |
114 | * @ptp: The PTP clock structure | |
115 | * @ppb: Parts per billion adjustment from the base | |
116 | * | |
117 | * Adjust the frequency of the PHC by the indicated parts per billion from the | |
118 | * base frequency. | |
119 | **/ | |
120 | static int i40e_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) | |
121 | { | |
122 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
123 | struct i40e_hw *hw = &pf->hw; | |
124 | u64 adj, freq, diff; | |
125 | int neg_adj = 0; | |
126 | ||
127 | if (ppb < 0) { | |
128 | neg_adj = 1; | |
129 | ppb = -ppb; | |
130 | } | |
131 | ||
132 | smp_mb(); /* Force any pending update before accessing. */ | |
133 | adj = ACCESS_ONCE(pf->ptp_base_adj); | |
134 | ||
135 | freq = adj; | |
136 | freq *= ppb; | |
137 | diff = div_u64(freq, 1000000000ULL); | |
138 | ||
139 | if (neg_adj) | |
140 | adj -= diff; | |
141 | else | |
142 | adj += diff; | |
143 | ||
144 | wr32(hw, I40E_PRTTSYN_INC_L, adj & 0xFFFFFFFF); | |
145 | wr32(hw, I40E_PRTTSYN_INC_H, adj >> 32); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | /** | |
151 | * i40e_ptp_adjtime - Adjust the PHC time | |
152 | * @ptp: The PTP clock structure | |
153 | * @delta: Offset in nanoseconds to adjust the PHC time by | |
154 | * | |
155 | * Adjust the frequency of the PHC by the indicated parts per billion from the | |
156 | * base frequency. | |
157 | **/ | |
158 | static int i40e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) | |
159 | { | |
160 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
6f7a9b8a | 161 | struct timespec64 now, then = ns_to_timespec64(delta); |
beb0dff1 JK |
162 | unsigned long flags; |
163 | ||
164 | spin_lock_irqsave(&pf->tmreg_lock, flags); | |
165 | ||
166 | i40e_ptp_read(pf, &now); | |
6f7a9b8a RC |
167 | now = timespec64_add(now, then); |
168 | i40e_ptp_write(pf, (const struct timespec64 *)&now); | |
beb0dff1 JK |
169 | |
170 | spin_unlock_irqrestore(&pf->tmreg_lock, flags); | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | /** | |
176 | * i40e_ptp_gettime - Get the time of the PHC | |
177 | * @ptp: The PTP clock structure | |
178 | * @ts: timespec structure to hold the current time value | |
179 | * | |
180 | * Read the device clock and return the correct value on ns, after converting it | |
181 | * into a timespec struct. | |
182 | **/ | |
6f7a9b8a | 183 | static int i40e_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) |
beb0dff1 JK |
184 | { |
185 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
186 | unsigned long flags; | |
187 | ||
188 | spin_lock_irqsave(&pf->tmreg_lock, flags); | |
189 | i40e_ptp_read(pf, ts); | |
190 | spin_unlock_irqrestore(&pf->tmreg_lock, flags); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | /** | |
196 | * i40e_ptp_settime - Set the time of the PHC | |
197 | * @ptp: The PTP clock structure | |
198 | * @ts: timespec structure that holds the new time value | |
199 | * | |
200 | * Set the device clock to the user input value. The conversion from timespec | |
201 | * to ns happens in the write function. | |
202 | **/ | |
203 | static int i40e_ptp_settime(struct ptp_clock_info *ptp, | |
6f7a9b8a | 204 | const struct timespec64 *ts) |
beb0dff1 JK |
205 | { |
206 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
207 | unsigned long flags; | |
208 | ||
209 | spin_lock_irqsave(&pf->tmreg_lock, flags); | |
210 | i40e_ptp_write(pf, ts); | |
211 | spin_unlock_irqrestore(&pf->tmreg_lock, flags); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
beb0dff1 | 216 | /** |
69d1a70c | 217 | * i40e_ptp_feature_enable - Enable/disable ancillary features of the PHC subsystem |
beb0dff1 JK |
218 | * @ptp: The PTP clock structure |
219 | * @rq: The requested feature to change | |
220 | * @on: Enable/disable flag | |
221 | * | |
222 | * The XL710 does not support any of the ancillary features of the PHC | |
223 | * subsystem, so this function may just return. | |
224 | **/ | |
69d1a70c JK |
225 | static int i40e_ptp_feature_enable(struct ptp_clock_info *ptp, |
226 | struct ptp_clock_request *rq, int on) | |
beb0dff1 JK |
227 | { |
228 | return -EOPNOTSUPP; | |
229 | } | |
230 | ||
231 | /** | |
232 | * i40e_ptp_rx_hang - Detect error case when Rx timestamp registers are hung | |
233 | * @vsi: The VSI with the rings relevant to 1588 | |
234 | * | |
235 | * This watchdog task is scheduled to detect error case where hardware has | |
236 | * dropped an Rx packet that was timestamped when the ring is full. The | |
237 | * particular error is rare but leaves the device in a state unable to timestamp | |
238 | * any future packets. | |
239 | **/ | |
240 | void i40e_ptp_rx_hang(struct i40e_vsi *vsi) | |
241 | { | |
242 | struct i40e_pf *pf = vsi->back; | |
243 | struct i40e_hw *hw = &pf->hw; | |
244 | struct i40e_ring *rx_ring; | |
245 | unsigned long rx_event; | |
246 | u32 prttsyn_stat; | |
247 | int n; | |
248 | ||
b535a013 JK |
249 | /* Since we cannot turn off the Rx timestamp logic if the device is |
250 | * configured for Tx timestamping, we check if Rx timestamping is | |
251 | * configured. We don't want to spuriously warn about Rx timestamp | |
252 | * hangs if we don't care about the timestamps. | |
253 | */ | |
254 | if (!(pf->flags & I40E_FLAG_PTP) || !pf->ptp_rx) | |
beb0dff1 JK |
255 | return; |
256 | ||
257 | prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1); | |
258 | ||
259 | /* Unless all four receive timestamp registers are latched, we are not | |
260 | * concerned about a possible PTP Rx hang, so just update the timeout | |
261 | * counter and exit. | |
262 | */ | |
263 | if (!(prttsyn_stat & ((I40E_PRTTSYN_STAT_1_RXT0_MASK << | |
264 | I40E_PRTTSYN_STAT_1_RXT0_SHIFT) | | |
265 | (I40E_PRTTSYN_STAT_1_RXT1_MASK << | |
266 | I40E_PRTTSYN_STAT_1_RXT1_SHIFT) | | |
267 | (I40E_PRTTSYN_STAT_1_RXT2_MASK << | |
268 | I40E_PRTTSYN_STAT_1_RXT2_SHIFT) | | |
269 | (I40E_PRTTSYN_STAT_1_RXT3_MASK << | |
270 | I40E_PRTTSYN_STAT_1_RXT3_SHIFT)))) { | |
271 | pf->last_rx_ptp_check = jiffies; | |
272 | return; | |
273 | } | |
274 | ||
275 | /* Determine the most recent watchdog or rx_timestamp event. */ | |
276 | rx_event = pf->last_rx_ptp_check; | |
277 | for (n = 0; n < vsi->num_queue_pairs; n++) { | |
278 | rx_ring = vsi->rx_rings[n]; | |
279 | if (time_after(rx_ring->last_rx_timestamp, rx_event)) | |
280 | rx_event = rx_ring->last_rx_timestamp; | |
281 | } | |
282 | ||
283 | /* Only need to read the high RXSTMP register to clear the lock */ | |
284 | if (time_is_before_jiffies(rx_event + 5 * HZ)) { | |
285 | rd32(hw, I40E_PRTTSYN_RXTIME_H(0)); | |
286 | rd32(hw, I40E_PRTTSYN_RXTIME_H(1)); | |
287 | rd32(hw, I40E_PRTTSYN_RXTIME_H(2)); | |
288 | rd32(hw, I40E_PRTTSYN_RXTIME_H(3)); | |
289 | pf->last_rx_ptp_check = jiffies; | |
290 | pf->rx_hwtstamp_cleared++; | |
291 | dev_warn(&vsi->back->pdev->dev, | |
c5ffe7e1 | 292 | "%s: clearing Rx timestamp hang\n", |
beb0dff1 JK |
293 | __func__); |
294 | } | |
295 | } | |
296 | ||
297 | /** | |
298 | * i40e_ptp_tx_hwtstamp - Utility function which returns the Tx timestamp | |
299 | * @pf: Board private structure | |
300 | * | |
301 | * Read the value of the Tx timestamp from the registers, convert it into a | |
302 | * value consumable by the stack, and store that result into the shhwtstamps | |
303 | * struct before returning it up the stack. | |
304 | **/ | |
305 | void i40e_ptp_tx_hwtstamp(struct i40e_pf *pf) | |
306 | { | |
307 | struct skb_shared_hwtstamps shhwtstamps; | |
308 | struct i40e_hw *hw = &pf->hw; | |
309 | u32 hi, lo; | |
310 | u64 ns; | |
311 | ||
22b4777d JK |
312 | if (!(pf->flags & I40E_FLAG_PTP) || !pf->ptp_tx) |
313 | return; | |
314 | ||
315 | /* don't attempt to timestamp if we don't have an skb */ | |
316 | if (!pf->ptp_tx_skb) | |
317 | return; | |
318 | ||
beb0dff1 JK |
319 | lo = rd32(hw, I40E_PRTTSYN_TXTIME_L); |
320 | hi = rd32(hw, I40E_PRTTSYN_TXTIME_H); | |
321 | ||
322 | ns = (((u64)hi) << 32) | lo; | |
323 | ||
324 | i40e_ptp_convert_to_hwtstamp(&shhwtstamps, ns); | |
325 | skb_tstamp_tx(pf->ptp_tx_skb, &shhwtstamps); | |
326 | dev_kfree_skb_any(pf->ptp_tx_skb); | |
327 | pf->ptp_tx_skb = NULL; | |
9ce34f02 | 328 | clear_bit_unlock(__I40E_PTP_TX_IN_PROGRESS, &pf->state); |
beb0dff1 JK |
329 | } |
330 | ||
331 | /** | |
332 | * i40e_ptp_rx_hwtstamp - Utility function which checks for an Rx timestamp | |
333 | * @pf: Board private structure | |
334 | * @skb: Particular skb to send timestamp with | |
335 | * @index: Index into the receive timestamp registers for the timestamp | |
336 | * | |
337 | * The XL710 receives a notification in the receive descriptor with an offset | |
338 | * into the set of RXTIME registers where the timestamp is for that skb. This | |
339 | * function goes and fetches the receive timestamp from that offset, if a valid | |
340 | * one exists. The RXTIME registers are in ns, so we must convert the result | |
341 | * first. | |
342 | **/ | |
343 | void i40e_ptp_rx_hwtstamp(struct i40e_pf *pf, struct sk_buff *skb, u8 index) | |
344 | { | |
345 | u32 prttsyn_stat, hi, lo; | |
346 | struct i40e_hw *hw; | |
347 | u64 ns; | |
348 | ||
349 | /* Since we cannot turn off the Rx timestamp logic if the device is | |
350 | * doing Tx timestamping, check if Rx timestamping is configured. | |
351 | */ | |
22b4777d | 352 | if (!(pf->flags & I40E_FLAG_PTP) || !pf->ptp_rx) |
beb0dff1 JK |
353 | return; |
354 | ||
355 | hw = &pf->hw; | |
356 | ||
357 | prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1); | |
358 | ||
41a1d04b | 359 | if (!(prttsyn_stat & BIT(index))) |
beb0dff1 JK |
360 | return; |
361 | ||
362 | lo = rd32(hw, I40E_PRTTSYN_RXTIME_L(index)); | |
363 | hi = rd32(hw, I40E_PRTTSYN_RXTIME_H(index)); | |
364 | ||
365 | ns = (((u64)hi) << 32) | lo; | |
366 | ||
367 | i40e_ptp_convert_to_hwtstamp(skb_hwtstamps(skb), ns); | |
368 | } | |
369 | ||
370 | /** | |
371 | * i40e_ptp_set_increment - Utility function to update clock increment rate | |
372 | * @pf: Board private structure | |
373 | * | |
374 | * During a link change, the DMA frequency that drives the 1588 logic will | |
375 | * change. In order to keep the PRTTSYN_TIME registers in units of nanoseconds, | |
376 | * we must update the increment value per clock tick. | |
377 | **/ | |
378 | void i40e_ptp_set_increment(struct i40e_pf *pf) | |
379 | { | |
380 | struct i40e_link_status *hw_link_info; | |
381 | struct i40e_hw *hw = &pf->hw; | |
382 | u64 incval; | |
383 | ||
384 | hw_link_info = &hw->phy.link_info; | |
385 | ||
386 | i40e_aq_get_link_info(&pf->hw, true, NULL, NULL); | |
387 | ||
388 | switch (hw_link_info->link_speed) { | |
389 | case I40E_LINK_SPEED_10GB: | |
390 | incval = I40E_PTP_10GB_INCVAL; | |
391 | break; | |
392 | case I40E_LINK_SPEED_1GB: | |
393 | incval = I40E_PTP_1GB_INCVAL; | |
394 | break; | |
395 | case I40E_LINK_SPEED_100MB: | |
e684fa34 SN |
396 | { |
397 | static int warn_once; | |
398 | ||
399 | if (!warn_once) { | |
400 | dev_warn(&pf->pdev->dev, | |
401 | "1588 functionality is not supported at 100 Mbps. Stopping the PHC.\n"); | |
402 | warn_once++; | |
403 | } | |
beb0dff1 JK |
404 | incval = 0; |
405 | break; | |
e684fa34 | 406 | } |
beb0dff1 JK |
407 | case I40E_LINK_SPEED_40GB: |
408 | default: | |
409 | incval = I40E_PTP_40GB_INCVAL; | |
410 | break; | |
411 | } | |
412 | ||
413 | /* Write the new increment value into the increment register. The | |
414 | * hardware will not update the clock until both registers have been | |
415 | * written. | |
416 | */ | |
417 | wr32(hw, I40E_PRTTSYN_INC_L, incval & 0xFFFFFFFF); | |
418 | wr32(hw, I40E_PRTTSYN_INC_H, incval >> 32); | |
419 | ||
420 | /* Update the base adjustement value. */ | |
421 | ACCESS_ONCE(pf->ptp_base_adj) = incval; | |
422 | smp_mb(); /* Force the above update. */ | |
423 | } | |
424 | ||
425 | /** | |
426 | * i40e_ptp_get_ts_config - ioctl interface to read the HW timestamping | |
427 | * @pf: Board private structure | |
428 | * @ifreq: ioctl data | |
429 | * | |
430 | * Obtain the current hardware timestamping settigs as requested. To do this, | |
431 | * keep a shadow copy of the timestamp settings rather than attempting to | |
432 | * deconstruct it from the registers. | |
433 | **/ | |
434 | int i40e_ptp_get_ts_config(struct i40e_pf *pf, struct ifreq *ifr) | |
435 | { | |
436 | struct hwtstamp_config *config = &pf->tstamp_config; | |
437 | ||
fe88bda9 JK |
438 | if (!(pf->flags & I40E_FLAG_PTP)) |
439 | return -EOPNOTSUPP; | |
440 | ||
beb0dff1 JK |
441 | return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? |
442 | -EFAULT : 0; | |
443 | } | |
444 | ||
445 | /** | |
18946455 | 446 | * i40e_ptp_set_timestamp_mode - setup hardware for requested timestamp mode |
beb0dff1 | 447 | * @pf: Board private structure |
18946455 | 448 | * @config: hwtstamp settings requested or saved |
beb0dff1 | 449 | * |
18946455 JK |
450 | * Control hardware registers to enter the specific mode requested by the |
451 | * user. Also used during reset path to ensure that timestamp settings are | |
452 | * maintained. | |
beb0dff1 | 453 | * |
18946455 JK |
454 | * Note: modifies config in place, and may update the requested mode to be |
455 | * more broad if the specific filter is not directly supported. | |
beb0dff1 | 456 | **/ |
18946455 JK |
457 | static int i40e_ptp_set_timestamp_mode(struct i40e_pf *pf, |
458 | struct hwtstamp_config *config) | |
beb0dff1 JK |
459 | { |
460 | struct i40e_hw *hw = &pf->hw; | |
fe88bda9 | 461 | u32 tsyntype, regval; |
beb0dff1 | 462 | |
beb0dff1 JK |
463 | /* Reserved for future extensions. */ |
464 | if (config->flags) | |
465 | return -EINVAL; | |
466 | ||
beb0dff1 JK |
467 | switch (config->tx_type) { |
468 | case HWTSTAMP_TX_OFF: | |
469 | pf->ptp_tx = false; | |
470 | break; | |
471 | case HWTSTAMP_TX_ON: | |
472 | pf->ptp_tx = true; | |
473 | break; | |
474 | default: | |
475 | return -ERANGE; | |
476 | } | |
477 | ||
478 | switch (config->rx_filter) { | |
479 | case HWTSTAMP_FILTER_NONE: | |
480 | pf->ptp_rx = false; | |
4fda14ca JK |
481 | /* We set the type to V1, but do not enable UDP packet |
482 | * recognition. In this way, we should be as close to | |
483 | * disabling PTP Rx timestamps as possible since V1 packets | |
484 | * are always UDP, since L2 packets are a V2 feature. | |
485 | */ | |
486 | tsyntype = I40E_PRTTSYN_CTL1_TSYNTYPE_V1; | |
beb0dff1 JK |
487 | break; |
488 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
489 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
490 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
491 | pf->ptp_rx = true; | |
492 | tsyntype = I40E_PRTTSYN_CTL1_V1MESSTYPE0_MASK | | |
493 | I40E_PRTTSYN_CTL1_TSYNTYPE_V1 | | |
494 | I40E_PRTTSYN_CTL1_UDP_ENA_MASK; | |
495 | config->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; | |
496 | break; | |
497 | case HWTSTAMP_FILTER_PTP_V2_EVENT: | |
498 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
499 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
500 | case HWTSTAMP_FILTER_PTP_V2_SYNC: | |
501 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
502 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
503 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
504 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
505 | case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: | |
506 | pf->ptp_rx = true; | |
507 | tsyntype = I40E_PRTTSYN_CTL1_V2MESSTYPE0_MASK | | |
508 | I40E_PRTTSYN_CTL1_TSYNTYPE_V2 | | |
509 | I40E_PRTTSYN_CTL1_UDP_ENA_MASK; | |
510 | config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; | |
511 | break; | |
512 | case HWTSTAMP_FILTER_ALL: | |
513 | default: | |
514 | return -ERANGE; | |
515 | } | |
516 | ||
517 | /* Clear out all 1588-related registers to clear and unlatch them. */ | |
518 | rd32(hw, I40E_PRTTSYN_STAT_0); | |
519 | rd32(hw, I40E_PRTTSYN_TXTIME_H); | |
520 | rd32(hw, I40E_PRTTSYN_RXTIME_H(0)); | |
521 | rd32(hw, I40E_PRTTSYN_RXTIME_H(1)); | |
522 | rd32(hw, I40E_PRTTSYN_RXTIME_H(2)); | |
523 | rd32(hw, I40E_PRTTSYN_RXTIME_H(3)); | |
524 | ||
525 | /* Enable/disable the Tx timestamp interrupt based on user input. */ | |
526 | regval = rd32(hw, I40E_PRTTSYN_CTL0); | |
527 | if (pf->ptp_tx) | |
528 | regval |= I40E_PRTTSYN_CTL0_TXTIME_INT_ENA_MASK; | |
529 | else | |
530 | regval &= ~I40E_PRTTSYN_CTL0_TXTIME_INT_ENA_MASK; | |
531 | wr32(hw, I40E_PRTTSYN_CTL0, regval); | |
532 | ||
533 | regval = rd32(hw, I40E_PFINT_ICR0_ENA); | |
534 | if (pf->ptp_tx) | |
535 | regval |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; | |
536 | else | |
537 | regval &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; | |
538 | wr32(hw, I40E_PFINT_ICR0_ENA, regval); | |
539 | ||
4fda14ca JK |
540 | /* Although there is no simple on/off switch for Rx, we "disable" Rx |
541 | * timestamps by setting to V1 only mode and clear the UDP | |
542 | * recognition. This ought to disable all PTP Rx timestamps as V1 | |
543 | * packets are always over UDP. Note that software is configured to | |
544 | * ignore Rx timestamps via the pf->ptp_rx flag. | |
beb0dff1 | 545 | */ |
4fda14ca JK |
546 | regval = rd32(hw, I40E_PRTTSYN_CTL1); |
547 | /* clear everything but the enable bit */ | |
548 | regval &= I40E_PRTTSYN_CTL1_TSYNENA_MASK; | |
549 | /* now enable bits for desired Rx timestamps */ | |
550 | regval |= tsyntype; | |
551 | wr32(hw, I40E_PRTTSYN_CTL1, regval); | |
beb0dff1 | 552 | |
18946455 JK |
553 | return 0; |
554 | } | |
555 | ||
556 | /** | |
557 | * i40e_ptp_set_ts_config - ioctl interface to control the HW timestamping | |
558 | * @pf: Board private structure | |
559 | * @ifreq: ioctl data | |
560 | * | |
561 | * Respond to the user filter requests and make the appropriate hardware | |
562 | * changes here. The XL710 cannot support splitting of the Tx/Rx timestamping | |
563 | * logic, so keep track in software of whether to indicate these timestamps | |
564 | * or not. | |
565 | * | |
566 | * It is permissible to "upgrade" the user request to a broader filter, as long | |
567 | * as the user receives the timestamps they care about and the user is notified | |
568 | * the filter has been broadened. | |
569 | **/ | |
570 | int i40e_ptp_set_ts_config(struct i40e_pf *pf, struct ifreq *ifr) | |
571 | { | |
d19af2af | 572 | struct hwtstamp_config config; |
18946455 JK |
573 | int err; |
574 | ||
fe88bda9 JK |
575 | if (!(pf->flags & I40E_FLAG_PTP)) |
576 | return -EOPNOTSUPP; | |
577 | ||
d19af2af | 578 | if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) |
18946455 JK |
579 | return -EFAULT; |
580 | ||
d19af2af | 581 | err = i40e_ptp_set_timestamp_mode(pf, &config); |
18946455 JK |
582 | if (err) |
583 | return err; | |
584 | ||
d19af2af JK |
585 | /* save these settings for future reference */ |
586 | pf->tstamp_config = config; | |
587 | ||
588 | return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? | |
beb0dff1 JK |
589 | -EFAULT : 0; |
590 | } | |
591 | ||
592 | /** | |
fbd5e2df | 593 | * i40e_ptp_create_clock - Create PTP clock device for userspace |
beb0dff1 JK |
594 | * @pf: Board private structure |
595 | * | |
fbd5e2df JK |
596 | * This function creates a new PTP clock device. It only creates one if we |
597 | * don't already have one, so it is safe to call. Will return error if it | |
598 | * can't create one, but success if we already have a device. Should be used | |
599 | * by i40e_ptp_init to create clock initially, and prevent global resets from | |
600 | * creating new clock devices. | |
beb0dff1 | 601 | **/ |
fbd5e2df | 602 | static long i40e_ptp_create_clock(struct i40e_pf *pf) |
beb0dff1 | 603 | { |
fbd5e2df JK |
604 | /* no need to create a clock device if we already have one */ |
605 | if (!IS_ERR_OR_NULL(pf->ptp_clock)) | |
606 | return 0; | |
beb0dff1 | 607 | |
fbd5e2df | 608 | strncpy(pf->ptp_caps.name, i40e_driver_name, sizeof(pf->ptp_caps.name)); |
beb0dff1 JK |
609 | pf->ptp_caps.owner = THIS_MODULE; |
610 | pf->ptp_caps.max_adj = 999999999; | |
611 | pf->ptp_caps.n_ext_ts = 0; | |
612 | pf->ptp_caps.pps = 0; | |
613 | pf->ptp_caps.adjfreq = i40e_ptp_adjfreq; | |
614 | pf->ptp_caps.adjtime = i40e_ptp_adjtime; | |
6f7a9b8a RC |
615 | pf->ptp_caps.gettime64 = i40e_ptp_gettime; |
616 | pf->ptp_caps.settime64 = i40e_ptp_settime; | |
69d1a70c | 617 | pf->ptp_caps.enable = i40e_ptp_feature_enable; |
beb0dff1 JK |
618 | |
619 | /* Attempt to register the clock before enabling the hardware. */ | |
620 | pf->ptp_clock = ptp_clock_register(&pf->ptp_caps, &pf->pdev->dev); | |
6995b36c | 621 | if (IS_ERR(pf->ptp_clock)) |
fbd5e2df | 622 | return PTR_ERR(pf->ptp_clock); |
fbd5e2df JK |
623 | |
624 | /* clear the hwtstamp settings here during clock create, instead of | |
625 | * during regular init, so that we can maintain settings across a | |
626 | * reset or suspend. | |
627 | */ | |
628 | pf->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; | |
629 | pf->tstamp_config.tx_type = HWTSTAMP_TX_OFF; | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | /** | |
635 | * i40e_ptp_init - Initialize the 1588 support after device probe or reset | |
636 | * @pf: Board private structure | |
637 | * | |
638 | * This function sets device up for 1588 support. The first time it is run, it | |
639 | * will create a PHC clock device. It does not create a clock device if one | |
640 | * already exists. It also reconfigures the device after a reset. | |
641 | **/ | |
642 | void i40e_ptp_init(struct i40e_pf *pf) | |
643 | { | |
644 | struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev; | |
645 | struct i40e_hw *hw = &pf->hw; | |
fe88bda9 | 646 | u32 pf_id; |
fbd5e2df JK |
647 | long err; |
648 | ||
fe88bda9 JK |
649 | /* Only one PF is assigned to control 1588 logic per port. Do not |
650 | * enable any support for PFs not assigned via PRTTSYN_CTL0.PF_ID | |
651 | */ | |
652 | pf_id = (rd32(hw, I40E_PRTTSYN_CTL0) & I40E_PRTTSYN_CTL0_PF_ID_MASK) >> | |
653 | I40E_PRTTSYN_CTL0_PF_ID_SHIFT; | |
654 | if (hw->pf_id != pf_id) { | |
655 | pf->flags &= ~I40E_FLAG_PTP; | |
656 | dev_info(&pf->pdev->dev, "%s: PTP not supported on %s\n", | |
657 | __func__, | |
658 | netdev->name); | |
659 | return; | |
660 | } | |
661 | ||
fbd5e2df JK |
662 | /* we have to initialize the lock first, since we can't control |
663 | * when the user will enter the PHC device entry points | |
664 | */ | |
665 | spin_lock_init(&pf->tmreg_lock); | |
666 | ||
667 | /* ensure we have a clock device */ | |
668 | err = i40e_ptp_create_clock(pf); | |
669 | if (err) { | |
beb0dff1 JK |
670 | pf->ptp_clock = NULL; |
671 | dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n", | |
672 | __func__); | |
673 | } else { | |
6f7a9b8a | 674 | struct timespec64 ts; |
beb0dff1 JK |
675 | u32 regval; |
676 | ||
6dec1017 SN |
677 | if (pf->hw.debug_mask & I40E_DEBUG_LAN) |
678 | dev_info(&pf->pdev->dev, "PHC enabled\n"); | |
beb0dff1 JK |
679 | pf->flags |= I40E_FLAG_PTP; |
680 | ||
681 | /* Ensure the clocks are running. */ | |
682 | regval = rd32(hw, I40E_PRTTSYN_CTL0); | |
683 | regval |= I40E_PRTTSYN_CTL0_TSYNENA_MASK; | |
684 | wr32(hw, I40E_PRTTSYN_CTL0, regval); | |
685 | regval = rd32(hw, I40E_PRTTSYN_CTL1); | |
686 | regval |= I40E_PRTTSYN_CTL1_TSYNENA_MASK; | |
687 | wr32(hw, I40E_PRTTSYN_CTL1, regval); | |
688 | ||
689 | /* Set the increment value per clock tick. */ | |
690 | i40e_ptp_set_increment(pf); | |
691 | ||
18946455 JK |
692 | /* reset timestamping mode */ |
693 | i40e_ptp_set_timestamp_mode(pf, &pf->tstamp_config); | |
beb0dff1 JK |
694 | |
695 | /* Set the clock value. */ | |
6f7a9b8a | 696 | ts = ktime_to_timespec64(ktime_get_real()); |
beb0dff1 JK |
697 | i40e_ptp_settime(&pf->ptp_caps, &ts); |
698 | } | |
699 | } | |
700 | ||
701 | /** | |
702 | * i40e_ptp_stop - Disable the driver/hardware support and unregister the PHC | |
703 | * @pf: Board private structure | |
704 | * | |
705 | * This function handles the cleanup work required from the initialization by | |
706 | * clearing out the important information and unregistering the PHC. | |
707 | **/ | |
708 | void i40e_ptp_stop(struct i40e_pf *pf) | |
709 | { | |
710 | pf->flags &= ~I40E_FLAG_PTP; | |
711 | pf->ptp_tx = false; | |
712 | pf->ptp_rx = false; | |
713 | ||
beb0dff1 JK |
714 | if (pf->ptp_tx_skb) { |
715 | dev_kfree_skb_any(pf->ptp_tx_skb); | |
716 | pf->ptp_tx_skb = NULL; | |
9ce34f02 | 717 | clear_bit_unlock(__I40E_PTP_TX_IN_PROGRESS, &pf->state); |
beb0dff1 JK |
718 | } |
719 | ||
720 | if (pf->ptp_clock) { | |
721 | ptp_clock_unregister(pf->ptp_clock); | |
722 | pf->ptp_clock = NULL; | |
723 | dev_info(&pf->pdev->dev, "%s: removed PHC on %s\n", __func__, | |
724 | pf->vsi[pf->lan_vsi]->netdev->name); | |
725 | } | |
726 | } |