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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" | |
28 | #include <linux/export.h> | |
29 | #include <linux/ptp_classify.h> | |
30 | ||
31 | /* The XL710 timesync is very much like Intel's 82599 design when it comes to | |
32 | * the fundamental clock design. However, the clock operations are much simpler | |
33 | * in the XL710 because the device supports a full 64 bits of nanoseconds. | |
34 | * Because the field is so wide, we can forgo the cycle counter and just | |
35 | * operate with the nanosecond field directly without fear of overflow. | |
36 | * | |
37 | * Much like the 82599, the update period is dependent upon the link speed: | |
38 | * At 40Gb link or no link, the period is 1.6ns. | |
39 | * At 10Gb link, the period is multiplied by 2. (3.2ns) | |
40 | * At 1Gb link, the period is multiplied by 20. (32ns) | |
41 | * 1588 functionality is not supported at 100Mbps. | |
42 | */ | |
43 | #define I40E_PTP_40GB_INCVAL 0x0199999999ULL | |
44 | #define I40E_PTP_10GB_INCVAL 0x0333333333ULL | |
45 | #define I40E_PTP_1GB_INCVAL 0x2000000000ULL | |
46 | ||
47 | #define I40E_PRTTSYN_CTL1_TSYNTYPE_V1 (0x1 << \ | |
48 | I40E_PRTTSYN_CTL1_TSYNTYPE_SHIFT) | |
49 | #define I40E_PRTTSYN_CTL1_TSYNTYPE_V2 (0x2 << \ | |
50 | I40E_PRTTSYN_CTL1_TSYNTYPE_SHIFT) | |
beb0dff1 JK |
51 | |
52 | /** | |
53 | * i40e_ptp_read - Read the PHC time from the device | |
54 | * @pf: Board private structure | |
55 | * @ts: timespec structure to hold the current time value | |
56 | * | |
57 | * This function reads the PRTTSYN_TIME registers and stores them in a | |
58 | * timespec. However, since the registers are 64 bits of nanoseconds, we must | |
59 | * convert the result to a timespec before we can return. | |
60 | **/ | |
61 | static void i40e_ptp_read(struct i40e_pf *pf, struct timespec *ts) | |
62 | { | |
63 | struct i40e_hw *hw = &pf->hw; | |
64 | u32 hi, lo; | |
65 | u64 ns; | |
66 | ||
67 | /* The timer latches on the lowest register read. */ | |
68 | lo = rd32(hw, I40E_PRTTSYN_TIME_L); | |
69 | hi = rd32(hw, I40E_PRTTSYN_TIME_H); | |
70 | ||
71 | ns = (((u64)hi) << 32) | lo; | |
72 | ||
73 | *ts = ns_to_timespec(ns); | |
74 | } | |
75 | ||
76 | /** | |
77 | * i40e_ptp_write - Write the PHC time to the device | |
78 | * @pf: Board private structure | |
79 | * @ts: timespec structure that holds the new time value | |
80 | * | |
81 | * This function writes the PRTTSYN_TIME registers with the user value. Since | |
82 | * we receive a timespec from the stack, we must convert that timespec into | |
83 | * nanoseconds before programming the registers. | |
84 | **/ | |
85 | static void i40e_ptp_write(struct i40e_pf *pf, const struct timespec *ts) | |
86 | { | |
87 | struct i40e_hw *hw = &pf->hw; | |
88 | u64 ns = timespec_to_ns(ts); | |
89 | ||
90 | /* The timer will not update until the high register is written, so | |
91 | * write the low register first. | |
92 | */ | |
93 | wr32(hw, I40E_PRTTSYN_TIME_L, ns & 0xFFFFFFFF); | |
94 | wr32(hw, I40E_PRTTSYN_TIME_H, ns >> 32); | |
95 | } | |
96 | ||
97 | /** | |
98 | * i40e_ptp_convert_to_hwtstamp - Convert device clock to system time | |
99 | * @hwtstamps: Timestamp structure to update | |
100 | * @timestamp: Timestamp from the hardware | |
101 | * | |
102 | * We need to convert the NIC clock value into a hwtstamp which can be used by | |
103 | * the upper level timestamping functions. Since the timestamp is simply a 64- | |
104 | * bit nanosecond value, we can call ns_to_ktime directly to handle this. | |
105 | **/ | |
106 | static void i40e_ptp_convert_to_hwtstamp(struct skb_shared_hwtstamps *hwtstamps, | |
107 | u64 timestamp) | |
108 | { | |
109 | memset(hwtstamps, 0, sizeof(*hwtstamps)); | |
110 | ||
111 | hwtstamps->hwtstamp = ns_to_ktime(timestamp); | |
112 | } | |
113 | ||
114 | /** | |
115 | * i40e_ptp_adjfreq - Adjust the PHC frequency | |
116 | * @ptp: The PTP clock structure | |
117 | * @ppb: Parts per billion adjustment from the base | |
118 | * | |
119 | * Adjust the frequency of the PHC by the indicated parts per billion from the | |
120 | * base frequency. | |
121 | **/ | |
122 | static int i40e_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) | |
123 | { | |
124 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
125 | struct i40e_hw *hw = &pf->hw; | |
126 | u64 adj, freq, diff; | |
127 | int neg_adj = 0; | |
128 | ||
129 | if (ppb < 0) { | |
130 | neg_adj = 1; | |
131 | ppb = -ppb; | |
132 | } | |
133 | ||
134 | smp_mb(); /* Force any pending update before accessing. */ | |
135 | adj = ACCESS_ONCE(pf->ptp_base_adj); | |
136 | ||
137 | freq = adj; | |
138 | freq *= ppb; | |
139 | diff = div_u64(freq, 1000000000ULL); | |
140 | ||
141 | if (neg_adj) | |
142 | adj -= diff; | |
143 | else | |
144 | adj += diff; | |
145 | ||
146 | wr32(hw, I40E_PRTTSYN_INC_L, adj & 0xFFFFFFFF); | |
147 | wr32(hw, I40E_PRTTSYN_INC_H, adj >> 32); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | /** | |
153 | * i40e_ptp_adjtime - Adjust the PHC time | |
154 | * @ptp: The PTP clock structure | |
155 | * @delta: Offset in nanoseconds to adjust the PHC time by | |
156 | * | |
157 | * Adjust the frequency of the PHC by the indicated parts per billion from the | |
158 | * base frequency. | |
159 | **/ | |
160 | static int i40e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) | |
161 | { | |
162 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
163 | struct timespec now, then = ns_to_timespec(delta); | |
164 | unsigned long flags; | |
165 | ||
166 | spin_lock_irqsave(&pf->tmreg_lock, flags); | |
167 | ||
168 | i40e_ptp_read(pf, &now); | |
169 | now = timespec_add(now, then); | |
170 | i40e_ptp_write(pf, (const struct timespec *)&now); | |
171 | ||
172 | spin_unlock_irqrestore(&pf->tmreg_lock, flags); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | /** | |
178 | * i40e_ptp_gettime - Get the time of the PHC | |
179 | * @ptp: The PTP clock structure | |
180 | * @ts: timespec structure to hold the current time value | |
181 | * | |
182 | * Read the device clock and return the correct value on ns, after converting it | |
183 | * into a timespec struct. | |
184 | **/ | |
185 | static int i40e_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts) | |
186 | { | |
187 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
188 | unsigned long flags; | |
189 | ||
190 | spin_lock_irqsave(&pf->tmreg_lock, flags); | |
191 | i40e_ptp_read(pf, ts); | |
192 | spin_unlock_irqrestore(&pf->tmreg_lock, flags); | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | /** | |
198 | * i40e_ptp_settime - Set the time of the PHC | |
199 | * @ptp: The PTP clock structure | |
200 | * @ts: timespec structure that holds the new time value | |
201 | * | |
202 | * Set the device clock to the user input value. The conversion from timespec | |
203 | * to ns happens in the write function. | |
204 | **/ | |
205 | static int i40e_ptp_settime(struct ptp_clock_info *ptp, | |
206 | const struct timespec *ts) | |
207 | { | |
208 | struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); | |
209 | unsigned long flags; | |
210 | ||
211 | spin_lock_irqsave(&pf->tmreg_lock, flags); | |
212 | i40e_ptp_write(pf, ts); | |
213 | spin_unlock_irqrestore(&pf->tmreg_lock, flags); | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
beb0dff1 JK |
218 | /** |
219 | * i40e_ptp_enable - Enable/disable ancillary features of the PHC subsystem | |
220 | * @ptp: The PTP clock structure | |
221 | * @rq: The requested feature to change | |
222 | * @on: Enable/disable flag | |
223 | * | |
224 | * The XL710 does not support any of the ancillary features of the PHC | |
225 | * subsystem, so this function may just return. | |
226 | **/ | |
227 | static int i40e_ptp_enable(struct ptp_clock_info *ptp, | |
228 | struct ptp_clock_request *rq, int on) | |
229 | { | |
230 | return -EOPNOTSUPP; | |
231 | } | |
232 | ||
233 | /** | |
234 | * i40e_ptp_rx_hang - Detect error case when Rx timestamp registers are hung | |
235 | * @vsi: The VSI with the rings relevant to 1588 | |
236 | * | |
237 | * This watchdog task is scheduled to detect error case where hardware has | |
238 | * dropped an Rx packet that was timestamped when the ring is full. The | |
239 | * particular error is rare but leaves the device in a state unable to timestamp | |
240 | * any future packets. | |
241 | **/ | |
242 | void i40e_ptp_rx_hang(struct i40e_vsi *vsi) | |
243 | { | |
244 | struct i40e_pf *pf = vsi->back; | |
245 | struct i40e_hw *hw = &pf->hw; | |
246 | struct i40e_ring *rx_ring; | |
247 | unsigned long rx_event; | |
248 | u32 prttsyn_stat; | |
249 | int n; | |
250 | ||
251 | if (pf->flags & I40E_FLAG_PTP) | |
252 | return; | |
253 | ||
254 | prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1); | |
255 | ||
256 | /* Unless all four receive timestamp registers are latched, we are not | |
257 | * concerned about a possible PTP Rx hang, so just update the timeout | |
258 | * counter and exit. | |
259 | */ | |
260 | if (!(prttsyn_stat & ((I40E_PRTTSYN_STAT_1_RXT0_MASK << | |
261 | I40E_PRTTSYN_STAT_1_RXT0_SHIFT) | | |
262 | (I40E_PRTTSYN_STAT_1_RXT1_MASK << | |
263 | I40E_PRTTSYN_STAT_1_RXT1_SHIFT) | | |
264 | (I40E_PRTTSYN_STAT_1_RXT2_MASK << | |
265 | I40E_PRTTSYN_STAT_1_RXT2_SHIFT) | | |
266 | (I40E_PRTTSYN_STAT_1_RXT3_MASK << | |
267 | I40E_PRTTSYN_STAT_1_RXT3_SHIFT)))) { | |
268 | pf->last_rx_ptp_check = jiffies; | |
269 | return; | |
270 | } | |
271 | ||
272 | /* Determine the most recent watchdog or rx_timestamp event. */ | |
273 | rx_event = pf->last_rx_ptp_check; | |
274 | for (n = 0; n < vsi->num_queue_pairs; n++) { | |
275 | rx_ring = vsi->rx_rings[n]; | |
276 | if (time_after(rx_ring->last_rx_timestamp, rx_event)) | |
277 | rx_event = rx_ring->last_rx_timestamp; | |
278 | } | |
279 | ||
280 | /* Only need to read the high RXSTMP register to clear the lock */ | |
281 | if (time_is_before_jiffies(rx_event + 5 * HZ)) { | |
282 | rd32(hw, I40E_PRTTSYN_RXTIME_H(0)); | |
283 | rd32(hw, I40E_PRTTSYN_RXTIME_H(1)); | |
284 | rd32(hw, I40E_PRTTSYN_RXTIME_H(2)); | |
285 | rd32(hw, I40E_PRTTSYN_RXTIME_H(3)); | |
286 | pf->last_rx_ptp_check = jiffies; | |
287 | pf->rx_hwtstamp_cleared++; | |
288 | dev_warn(&vsi->back->pdev->dev, | |
c5ffe7e1 | 289 | "%s: clearing Rx timestamp hang\n", |
beb0dff1 JK |
290 | __func__); |
291 | } | |
292 | } | |
293 | ||
294 | /** | |
295 | * i40e_ptp_tx_hwtstamp - Utility function which returns the Tx timestamp | |
296 | * @pf: Board private structure | |
297 | * | |
298 | * Read the value of the Tx timestamp from the registers, convert it into a | |
299 | * value consumable by the stack, and store that result into the shhwtstamps | |
300 | * struct before returning it up the stack. | |
301 | **/ | |
302 | void i40e_ptp_tx_hwtstamp(struct i40e_pf *pf) | |
303 | { | |
304 | struct skb_shared_hwtstamps shhwtstamps; | |
305 | struct i40e_hw *hw = &pf->hw; | |
306 | u32 hi, lo; | |
307 | u64 ns; | |
308 | ||
309 | lo = rd32(hw, I40E_PRTTSYN_TXTIME_L); | |
310 | hi = rd32(hw, I40E_PRTTSYN_TXTIME_H); | |
311 | ||
312 | ns = (((u64)hi) << 32) | lo; | |
313 | ||
314 | i40e_ptp_convert_to_hwtstamp(&shhwtstamps, ns); | |
315 | skb_tstamp_tx(pf->ptp_tx_skb, &shhwtstamps); | |
316 | dev_kfree_skb_any(pf->ptp_tx_skb); | |
317 | pf->ptp_tx_skb = NULL; | |
318 | } | |
319 | ||
320 | /** | |
321 | * i40e_ptp_rx_hwtstamp - Utility function which checks for an Rx timestamp | |
322 | * @pf: Board private structure | |
323 | * @skb: Particular skb to send timestamp with | |
324 | * @index: Index into the receive timestamp registers for the timestamp | |
325 | * | |
326 | * The XL710 receives a notification in the receive descriptor with an offset | |
327 | * into the set of RXTIME registers where the timestamp is for that skb. This | |
328 | * function goes and fetches the receive timestamp from that offset, if a valid | |
329 | * one exists. The RXTIME registers are in ns, so we must convert the result | |
330 | * first. | |
331 | **/ | |
332 | void i40e_ptp_rx_hwtstamp(struct i40e_pf *pf, struct sk_buff *skb, u8 index) | |
333 | { | |
334 | u32 prttsyn_stat, hi, lo; | |
335 | struct i40e_hw *hw; | |
336 | u64 ns; | |
337 | ||
338 | /* Since we cannot turn off the Rx timestamp logic if the device is | |
339 | * doing Tx timestamping, check if Rx timestamping is configured. | |
340 | */ | |
341 | if (!pf->ptp_rx) | |
342 | return; | |
343 | ||
344 | hw = &pf->hw; | |
345 | ||
346 | prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1); | |
347 | ||
348 | if (!(prttsyn_stat & (1 << index))) | |
349 | return; | |
350 | ||
351 | lo = rd32(hw, I40E_PRTTSYN_RXTIME_L(index)); | |
352 | hi = rd32(hw, I40E_PRTTSYN_RXTIME_H(index)); | |
353 | ||
354 | ns = (((u64)hi) << 32) | lo; | |
355 | ||
356 | i40e_ptp_convert_to_hwtstamp(skb_hwtstamps(skb), ns); | |
357 | } | |
358 | ||
359 | /** | |
360 | * i40e_ptp_set_increment - Utility function to update clock increment rate | |
361 | * @pf: Board private structure | |
362 | * | |
363 | * During a link change, the DMA frequency that drives the 1588 logic will | |
364 | * change. In order to keep the PRTTSYN_TIME registers in units of nanoseconds, | |
365 | * we must update the increment value per clock tick. | |
366 | **/ | |
367 | void i40e_ptp_set_increment(struct i40e_pf *pf) | |
368 | { | |
369 | struct i40e_link_status *hw_link_info; | |
370 | struct i40e_hw *hw = &pf->hw; | |
371 | u64 incval; | |
372 | ||
373 | hw_link_info = &hw->phy.link_info; | |
374 | ||
375 | i40e_aq_get_link_info(&pf->hw, true, NULL, NULL); | |
376 | ||
377 | switch (hw_link_info->link_speed) { | |
378 | case I40E_LINK_SPEED_10GB: | |
379 | incval = I40E_PTP_10GB_INCVAL; | |
380 | break; | |
381 | case I40E_LINK_SPEED_1GB: | |
382 | incval = I40E_PTP_1GB_INCVAL; | |
383 | break; | |
384 | case I40E_LINK_SPEED_100MB: | |
385 | dev_warn(&pf->pdev->dev, | |
386 | "%s: 1588 functionality is not supported at 100 Mbps. Stopping the PHC.\n", | |
387 | __func__); | |
388 | incval = 0; | |
389 | break; | |
390 | case I40E_LINK_SPEED_40GB: | |
391 | default: | |
392 | incval = I40E_PTP_40GB_INCVAL; | |
393 | break; | |
394 | } | |
395 | ||
396 | /* Write the new increment value into the increment register. The | |
397 | * hardware will not update the clock until both registers have been | |
398 | * written. | |
399 | */ | |
400 | wr32(hw, I40E_PRTTSYN_INC_L, incval & 0xFFFFFFFF); | |
401 | wr32(hw, I40E_PRTTSYN_INC_H, incval >> 32); | |
402 | ||
403 | /* Update the base adjustement value. */ | |
404 | ACCESS_ONCE(pf->ptp_base_adj) = incval; | |
405 | smp_mb(); /* Force the above update. */ | |
406 | } | |
407 | ||
408 | /** | |
409 | * i40e_ptp_get_ts_config - ioctl interface to read the HW timestamping | |
410 | * @pf: Board private structure | |
411 | * @ifreq: ioctl data | |
412 | * | |
413 | * Obtain the current hardware timestamping settigs as requested. To do this, | |
414 | * keep a shadow copy of the timestamp settings rather than attempting to | |
415 | * deconstruct it from the registers. | |
416 | **/ | |
417 | int i40e_ptp_get_ts_config(struct i40e_pf *pf, struct ifreq *ifr) | |
418 | { | |
419 | struct hwtstamp_config *config = &pf->tstamp_config; | |
420 | ||
421 | return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? | |
422 | -EFAULT : 0; | |
423 | } | |
424 | ||
425 | /** | |
426 | * i40e_ptp_set_ts_config - ioctl interface to control the HW timestamping | |
427 | * @pf: Board private structure | |
428 | * @ifreq: ioctl data | |
429 | * | |
430 | * Respond to the user filter requests and make the appropriate hardware | |
431 | * changes here. The XL710 cannot support splitting of the Tx/Rx timestamping | |
432 | * logic, so keep track in software of whether to indicate these timestamps | |
433 | * or not. | |
434 | * | |
435 | * It is permissible to "upgrade" the user request to a broader filter, as long | |
436 | * as the user receives the timestamps they care about and the user is notified | |
437 | * the filter has been broadened. | |
438 | **/ | |
439 | int i40e_ptp_set_ts_config(struct i40e_pf *pf, struct ifreq *ifr) | |
440 | { | |
441 | struct i40e_hw *hw = &pf->hw; | |
442 | struct hwtstamp_config *config = &pf->tstamp_config; | |
443 | u32 pf_id, tsyntype, regval; | |
444 | ||
445 | if (copy_from_user(config, ifr->ifr_data, sizeof(*config))) | |
446 | return -EFAULT; | |
447 | ||
448 | /* Reserved for future extensions. */ | |
449 | if (config->flags) | |
450 | return -EINVAL; | |
451 | ||
452 | /* Confirm that 1588 is supported on this PF. */ | |
453 | pf_id = (rd32(hw, I40E_PRTTSYN_CTL0) & I40E_PRTTSYN_CTL0_PF_ID_MASK) >> | |
454 | I40E_PRTTSYN_CTL0_PF_ID_SHIFT; | |
455 | if (hw->pf_id != pf_id) | |
456 | return -EINVAL; | |
457 | ||
458 | switch (config->tx_type) { | |
459 | case HWTSTAMP_TX_OFF: | |
460 | pf->ptp_tx = false; | |
461 | break; | |
462 | case HWTSTAMP_TX_ON: | |
463 | pf->ptp_tx = true; | |
464 | break; | |
465 | default: | |
466 | return -ERANGE; | |
467 | } | |
468 | ||
469 | switch (config->rx_filter) { | |
470 | case HWTSTAMP_FILTER_NONE: | |
471 | pf->ptp_rx = false; | |
472 | tsyntype = 0; | |
473 | break; | |
474 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
475 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
476 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
477 | pf->ptp_rx = true; | |
478 | tsyntype = I40E_PRTTSYN_CTL1_V1MESSTYPE0_MASK | | |
479 | I40E_PRTTSYN_CTL1_TSYNTYPE_V1 | | |
480 | I40E_PRTTSYN_CTL1_UDP_ENA_MASK; | |
481 | config->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; | |
482 | break; | |
483 | case HWTSTAMP_FILTER_PTP_V2_EVENT: | |
484 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
485 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
486 | case HWTSTAMP_FILTER_PTP_V2_SYNC: | |
487 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
488 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
489 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
490 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
491 | case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: | |
492 | pf->ptp_rx = true; | |
493 | tsyntype = I40E_PRTTSYN_CTL1_V2MESSTYPE0_MASK | | |
494 | I40E_PRTTSYN_CTL1_TSYNTYPE_V2 | | |
495 | I40E_PRTTSYN_CTL1_UDP_ENA_MASK; | |
496 | config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; | |
497 | break; | |
498 | case HWTSTAMP_FILTER_ALL: | |
499 | default: | |
500 | return -ERANGE; | |
501 | } | |
502 | ||
503 | /* Clear out all 1588-related registers to clear and unlatch them. */ | |
504 | rd32(hw, I40E_PRTTSYN_STAT_0); | |
505 | rd32(hw, I40E_PRTTSYN_TXTIME_H); | |
506 | rd32(hw, I40E_PRTTSYN_RXTIME_H(0)); | |
507 | rd32(hw, I40E_PRTTSYN_RXTIME_H(1)); | |
508 | rd32(hw, I40E_PRTTSYN_RXTIME_H(2)); | |
509 | rd32(hw, I40E_PRTTSYN_RXTIME_H(3)); | |
510 | ||
511 | /* Enable/disable the Tx timestamp interrupt based on user input. */ | |
512 | regval = rd32(hw, I40E_PRTTSYN_CTL0); | |
513 | if (pf->ptp_tx) | |
514 | regval |= I40E_PRTTSYN_CTL0_TXTIME_INT_ENA_MASK; | |
515 | else | |
516 | regval &= ~I40E_PRTTSYN_CTL0_TXTIME_INT_ENA_MASK; | |
517 | wr32(hw, I40E_PRTTSYN_CTL0, regval); | |
518 | ||
519 | regval = rd32(hw, I40E_PFINT_ICR0_ENA); | |
520 | if (pf->ptp_tx) | |
521 | regval |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; | |
522 | else | |
523 | regval &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; | |
524 | wr32(hw, I40E_PFINT_ICR0_ENA, regval); | |
525 | ||
526 | /* There is no simple on/off switch for Rx. To "disable" Rx support, | |
527 | * ignore any received timestamps, rather than turn off the clock. | |
528 | */ | |
529 | if (pf->ptp_rx) { | |
530 | regval = rd32(hw, I40E_PRTTSYN_CTL1); | |
531 | /* clear everything but the enable bit */ | |
532 | regval &= I40E_PRTTSYN_CTL1_TSYNENA_MASK; | |
533 | /* now enable bits for desired Rx timestamps */ | |
534 | regval |= tsyntype; | |
535 | wr32(hw, I40E_PRTTSYN_CTL1, regval); | |
536 | } | |
537 | ||
538 | return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? | |
539 | -EFAULT : 0; | |
540 | } | |
541 | ||
542 | /** | |
543 | * i40e_ptp_init - Initialize the 1588 support and register the PHC | |
544 | * @pf: Board private structure | |
545 | * | |
546 | * This function registers the device clock as a PHC. If it is successful, it | |
547 | * starts the clock in the hardware. | |
548 | **/ | |
549 | void i40e_ptp_init(struct i40e_pf *pf) | |
550 | { | |
551 | struct i40e_hw *hw = &pf->hw; | |
552 | struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev; | |
553 | ||
554 | strncpy(pf->ptp_caps.name, "i40e", sizeof(pf->ptp_caps.name)); | |
555 | pf->ptp_caps.owner = THIS_MODULE; | |
556 | pf->ptp_caps.max_adj = 999999999; | |
557 | pf->ptp_caps.n_ext_ts = 0; | |
558 | pf->ptp_caps.pps = 0; | |
559 | pf->ptp_caps.adjfreq = i40e_ptp_adjfreq; | |
560 | pf->ptp_caps.adjtime = i40e_ptp_adjtime; | |
561 | pf->ptp_caps.gettime = i40e_ptp_gettime; | |
562 | pf->ptp_caps.settime = i40e_ptp_settime; | |
563 | pf->ptp_caps.enable = i40e_ptp_enable; | |
564 | ||
565 | /* Attempt to register the clock before enabling the hardware. */ | |
566 | pf->ptp_clock = ptp_clock_register(&pf->ptp_caps, &pf->pdev->dev); | |
567 | if (IS_ERR(pf->ptp_clock)) { | |
568 | pf->ptp_clock = NULL; | |
569 | dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n", | |
570 | __func__); | |
571 | } else { | |
572 | struct timespec ts; | |
573 | u32 regval; | |
574 | ||
575 | spin_lock_init(&pf->tmreg_lock); | |
beb0dff1 JK |
576 | |
577 | dev_info(&pf->pdev->dev, "%s: added PHC on %s\n", __func__, | |
578 | netdev->name); | |
579 | pf->flags |= I40E_FLAG_PTP; | |
580 | ||
581 | /* Ensure the clocks are running. */ | |
582 | regval = rd32(hw, I40E_PRTTSYN_CTL0); | |
583 | regval |= I40E_PRTTSYN_CTL0_TSYNENA_MASK; | |
584 | wr32(hw, I40E_PRTTSYN_CTL0, regval); | |
585 | regval = rd32(hw, I40E_PRTTSYN_CTL1); | |
586 | regval |= I40E_PRTTSYN_CTL1_TSYNENA_MASK; | |
587 | wr32(hw, I40E_PRTTSYN_CTL1, regval); | |
588 | ||
589 | /* Set the increment value per clock tick. */ | |
590 | i40e_ptp_set_increment(pf); | |
591 | ||
592 | /* reset the tstamp_config */ | |
593 | memset(&pf->tstamp_config, 0, sizeof(pf->tstamp_config)); | |
594 | ||
595 | /* Set the clock value. */ | |
596 | ts = ktime_to_timespec(ktime_get_real()); | |
597 | i40e_ptp_settime(&pf->ptp_caps, &ts); | |
598 | } | |
599 | } | |
600 | ||
601 | /** | |
602 | * i40e_ptp_stop - Disable the driver/hardware support and unregister the PHC | |
603 | * @pf: Board private structure | |
604 | * | |
605 | * This function handles the cleanup work required from the initialization by | |
606 | * clearing out the important information and unregistering the PHC. | |
607 | **/ | |
608 | void i40e_ptp_stop(struct i40e_pf *pf) | |
609 | { | |
610 | pf->flags &= ~I40E_FLAG_PTP; | |
611 | pf->ptp_tx = false; | |
612 | pf->ptp_rx = false; | |
613 | ||
beb0dff1 JK |
614 | if (pf->ptp_tx_skb) { |
615 | dev_kfree_skb_any(pf->ptp_tx_skb); | |
616 | pf->ptp_tx_skb = NULL; | |
617 | } | |
618 | ||
619 | if (pf->ptp_clock) { | |
620 | ptp_clock_unregister(pf->ptp_clock); | |
621 | pf->ptp_clock = NULL; | |
622 | dev_info(&pf->pdev->dev, "%s: removed PHC on %s\n", __func__, | |
623 | pf->vsi[pf->lan_vsi]->netdev->name); | |
624 | } | |
625 | } |