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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7c236c43 | 2 | /**************************************************************************** |
f7a6d2c4 BH |
3 | * Driver for Solarflare network controllers and boards |
4 | * Copyright 2011-2013 Solarflare Communications Inc. | |
7c236c43 SH |
5 | */ |
6 | ||
7 | /* Theory of operation: | |
8 | * | |
9 | * PTP support is assisted by firmware running on the MC, which provides | |
10 | * the hardware timestamping capabilities. Both transmitted and received | |
11 | * PTP event packets are queued onto internal queues for subsequent processing; | |
12 | * this is because the MC operations are relatively long and would block | |
13 | * block NAPI/interrupt operation. | |
14 | * | |
15 | * Receive event processing: | |
16 | * The event contains the packet's UUID and sequence number, together | |
17 | * with the hardware timestamp. The PTP receive packet queue is searched | |
18 | * for this UUID/sequence number and, if found, put on a pending queue. | |
19 | * Packets not matching are delivered without timestamps (MCDI events will | |
20 | * always arrive after the actual packet). | |
21 | * It is important for the operation of the PTP protocol that the ordering | |
22 | * of packets between the event and general port is maintained. | |
23 | * | |
24 | * Work queue processing: | |
25 | * If work waiting, synchronise host/hardware time | |
26 | * | |
27 | * Transmit: send packet through MC, which returns the transmission time | |
28 | * that is converted to an appropriate timestamp. | |
29 | * | |
30 | * Receive: the packet's reception time is converted to an appropriate | |
31 | * timestamp. | |
32 | */ | |
33 | #include <linux/ip.h> | |
34 | #include <linux/udp.h> | |
35 | #include <linux/time.h> | |
36 | #include <linux/ktime.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/net_tstamp.h> | |
39 | #include <linux/pps_kernel.h> | |
40 | #include <linux/ptp_clock_kernel.h> | |
41 | #include "net_driver.h" | |
42 | #include "efx.h" | |
43 | #include "mcdi.h" | |
44 | #include "mcdi_pcol.h" | |
45 | #include "io.h" | |
8b8a95a1 | 46 | #include "farch_regs.h" |
7c236c43 SH |
47 | #include "nic.h" |
48 | ||
49 | /* Maximum number of events expected to make up a PTP event */ | |
50 | #define MAX_EVENT_FRAGS 3 | |
51 | ||
52 | /* Maximum delay, ms, to begin synchronisation */ | |
53 | #define MAX_SYNCHRONISE_WAIT_MS 2 | |
54 | ||
55 | /* How long, at most, to spend synchronising */ | |
56 | #define SYNCHRONISE_PERIOD_NS 250000 | |
57 | ||
58 | /* How often to update the shared memory time */ | |
59 | #define SYNCHRONISATION_GRANULARITY_NS 200 | |
60 | ||
61 | /* Minimum permitted length of a (corrected) synchronisation time */ | |
a6f73460 | 62 | #define DEFAULT_MIN_SYNCHRONISATION_NS 120 |
7c236c43 SH |
63 | |
64 | /* Maximum permitted length of a (corrected) synchronisation time */ | |
65 | #define MAX_SYNCHRONISATION_NS 1000 | |
66 | ||
67 | /* How many (MC) receive events that can be queued */ | |
68 | #define MAX_RECEIVE_EVENTS 8 | |
69 | ||
70 | /* Length of (modified) moving average. */ | |
71 | #define AVERAGE_LENGTH 16 | |
72 | ||
73 | /* How long an unmatched event or packet can be held */ | |
74 | #define PKT_EVENT_LIFETIME_MS 10 | |
75 | ||
76 | /* Offsets into PTP packet for identification. These offsets are from the | |
77 | * start of the IP header, not the MAC header. Note that neither PTP V1 nor | |
78 | * PTP V2 permit the use of IPV4 options. | |
79 | */ | |
80 | #define PTP_DPORT_OFFSET 22 | |
81 | ||
82 | #define PTP_V1_VERSION_LENGTH 2 | |
83 | #define PTP_V1_VERSION_OFFSET 28 | |
84 | ||
85 | #define PTP_V1_UUID_LENGTH 6 | |
86 | #define PTP_V1_UUID_OFFSET 50 | |
87 | ||
88 | #define PTP_V1_SEQUENCE_LENGTH 2 | |
89 | #define PTP_V1_SEQUENCE_OFFSET 58 | |
90 | ||
91 | /* The minimum length of a PTP V1 packet for offsets, etc. to be valid: | |
92 | * includes IP header. | |
93 | */ | |
94 | #define PTP_V1_MIN_LENGTH 64 | |
95 | ||
96 | #define PTP_V2_VERSION_LENGTH 1 | |
97 | #define PTP_V2_VERSION_OFFSET 29 | |
98 | ||
c939a316 LE |
99 | #define PTP_V2_UUID_LENGTH 8 |
100 | #define PTP_V2_UUID_OFFSET 48 | |
101 | ||
7c236c43 SH |
102 | /* Although PTP V2 UUIDs are comprised a ClockIdentity (8) and PortNumber (2), |
103 | * the MC only captures the last six bytes of the clock identity. These values | |
104 | * reflect those, not the ones used in the standard. The standard permits | |
105 | * mapping of V1 UUIDs to V2 UUIDs with these same values. | |
106 | */ | |
107 | #define PTP_V2_MC_UUID_LENGTH 6 | |
108 | #define PTP_V2_MC_UUID_OFFSET 50 | |
109 | ||
110 | #define PTP_V2_SEQUENCE_LENGTH 2 | |
111 | #define PTP_V2_SEQUENCE_OFFSET 58 | |
112 | ||
113 | /* The minimum length of a PTP V2 packet for offsets, etc. to be valid: | |
114 | * includes IP header. | |
115 | */ | |
116 | #define PTP_V2_MIN_LENGTH 63 | |
117 | ||
118 | #define PTP_MIN_LENGTH 63 | |
119 | ||
120 | #define PTP_ADDRESS 0xe0000181 /* 224.0.1.129 */ | |
121 | #define PTP_EVENT_PORT 319 | |
122 | #define PTP_GENERAL_PORT 320 | |
123 | ||
124 | /* Annoyingly the format of the version numbers are different between | |
125 | * versions 1 and 2 so it isn't possible to simply look for 1 or 2. | |
126 | */ | |
127 | #define PTP_VERSION_V1 1 | |
128 | ||
129 | #define PTP_VERSION_V2 2 | |
130 | #define PTP_VERSION_V2_MASK 0x0f | |
131 | ||
132 | enum ptp_packet_state { | |
133 | PTP_PACKET_STATE_UNMATCHED = 0, | |
134 | PTP_PACKET_STATE_MATCHED, | |
135 | PTP_PACKET_STATE_TIMED_OUT, | |
136 | PTP_PACKET_STATE_MATCH_UNWANTED | |
137 | }; | |
138 | ||
139 | /* NIC synchronised with single word of time only comprising | |
140 | * partial seconds and full nanoseconds: 10^9 ~ 2^30 so 2 bits for seconds. | |
141 | */ | |
142 | #define MC_NANOSECOND_BITS 30 | |
143 | #define MC_NANOSECOND_MASK ((1 << MC_NANOSECOND_BITS) - 1) | |
144 | #define MC_SECOND_MASK ((1 << (32 - MC_NANOSECOND_BITS)) - 1) | |
145 | ||
146 | /* Maximum parts-per-billion adjustment that is acceptable */ | |
147 | #define MAX_PPB 1000000 | |
148 | ||
7c236c43 | 149 | /* Precalculate scale word to avoid long long division at runtime */ |
88a4fb5f LE |
150 | /* This is equivalent to 2^66 / 10^9. */ |
151 | #define PPB_SCALE_WORD ((1LL << (57)) / 1953125LL) | |
152 | ||
153 | /* How much to shift down after scaling to convert to FP40 */ | |
154 | #define PPB_SHIFT_FP40 26 | |
155 | /* ... and FP44. */ | |
156 | #define PPB_SHIFT_FP44 22 | |
7c236c43 SH |
157 | |
158 | #define PTP_SYNC_ATTEMPTS 4 | |
159 | ||
160 | /** | |
161 | * struct efx_ptp_match - Matching structure, stored in sk_buff's cb area. | |
162 | * @words: UUID and (partial) sequence number | |
163 | * @expiry: Time after which the packet should be delivered irrespective of | |
164 | * event arrival. | |
165 | * @state: The state of the packet - whether it is ready for processing or | |
166 | * whether that is of no interest. | |
167 | */ | |
168 | struct efx_ptp_match { | |
169 | u32 words[DIV_ROUND_UP(PTP_V1_UUID_LENGTH, 4)]; | |
170 | unsigned long expiry; | |
171 | enum ptp_packet_state state; | |
172 | }; | |
173 | ||
174 | /** | |
175 | * struct efx_ptp_event_rx - A PTP receive event (from MC) | |
176 | * @seq0: First part of (PTP) UUID | |
177 | * @seq1: Second part of (PTP) UUID and sequence number | |
178 | * @hwtimestamp: Event timestamp | |
179 | */ | |
180 | struct efx_ptp_event_rx { | |
181 | struct list_head link; | |
182 | u32 seq0; | |
183 | u32 seq1; | |
184 | ktime_t hwtimestamp; | |
185 | unsigned long expiry; | |
186 | }; | |
187 | ||
188 | /** | |
189 | * struct efx_ptp_timeset - Synchronisation between host and MC | |
190 | * @host_start: Host time immediately before hardware timestamp taken | |
a6f73460 LE |
191 | * @major: Hardware timestamp, major |
192 | * @minor: Hardware timestamp, minor | |
7c236c43 | 193 | * @host_end: Host time immediately after hardware timestamp taken |
a6f73460 | 194 | * @wait: Number of NIC clock ticks between hardware timestamp being read and |
7c236c43 SH |
195 | * host end time being seen |
196 | * @window: Difference of host_end and host_start | |
197 | * @valid: Whether this timeset is valid | |
198 | */ | |
199 | struct efx_ptp_timeset { | |
200 | u32 host_start; | |
a6f73460 LE |
201 | u32 major; |
202 | u32 minor; | |
7c236c43 | 203 | u32 host_end; |
a6f73460 | 204 | u32 wait; |
7c236c43 SH |
205 | u32 window; /* Derived: end - start, allowing for wrap */ |
206 | }; | |
207 | ||
208 | /** | |
209 | * struct efx_ptp_data - Precision Time Protocol (PTP) state | |
ac36baf8 BH |
210 | * @efx: The NIC context |
211 | * @channel: The PTP channel (Siena only) | |
bd9a265d JC |
212 | * @rx_ts_inline: Flag for whether RX timestamps are inline (else they are |
213 | * separate events) | |
23418dc1 MH |
214 | * @rxq: Receive SKB queue (awaiting timestamps) |
215 | * @txq: Transmit SKB queue | |
7c236c43 SH |
216 | * @evt_list: List of MC receive events awaiting packets |
217 | * @evt_free_list: List of free events | |
218 | * @evt_lock: Lock for manipulating evt_list and evt_free_list | |
219 | * @rx_evts: Instantiated events (on evt_list and evt_free_list) | |
220 | * @workwq: Work queue for processing pending PTP operations | |
221 | * @work: Work task | |
222 | * @reset_required: A serious error has occurred and the PTP task needs to be | |
223 | * reset (disable, enable). | |
224 | * @rxfilter_event: Receive filter when operating | |
225 | * @rxfilter_general: Receive filter when operating | |
226 | * @config: Current timestamp configuration | |
227 | * @enabled: PTP operation enabled | |
228 | * @mode: Mode in which PTP operating (PTP version) | |
a6f73460 LE |
229 | * @ns_to_nic_time: Function to convert from scalar nanoseconds to NIC time |
230 | * @nic_to_kernel_time: Function to convert from NIC to kernel time | |
1280c0f8 EC |
231 | * @nic_time.minor_max: Wrap point for NIC minor times |
232 | * @nic_time.sync_event_diff_min: Minimum acceptable difference between time | |
233 | * in packet prefix and last MCDI time sync event i.e. how much earlier than | |
234 | * the last sync event time a packet timestamp can be. | |
235 | * @nic_time.sync_event_diff_max: Maximum acceptable difference between time | |
236 | * in packet prefix and last MCDI time sync event i.e. how much later than | |
237 | * the last sync event time a packet timestamp can be. | |
238 | * @nic_time.sync_event_minor_shift: Shift required to make minor time from | |
239 | * field in MCDI time sync event. | |
a6f73460 | 240 | * @min_synchronisation_ns: Minimum acceptable corrected sync window |
04796f4c LE |
241 | * @capabilities: Capabilities flags from the NIC |
242 | * @ts_corrections.ptp_tx: Required driver correction of PTP packet transmit | |
243 | * timestamps | |
244 | * @ts_corrections.ptp_rx: Required driver correction of PTP packet receive | |
245 | * timestamps | |
a6f73460 LE |
246 | * @ts_corrections.pps_out: PPS output error (information only) |
247 | * @ts_corrections.pps_in: Required driver correction of PPS input timestamps | |
04796f4c LE |
248 | * @ts_corrections.general_tx: Required driver correction of general packet |
249 | * transmit timestamps | |
250 | * @ts_corrections.general_rx: Required driver correction of general packet | |
251 | * receive timestamps | |
7c236c43 SH |
252 | * @evt_frags: Partly assembled PTP events |
253 | * @evt_frag_idx: Current fragment number | |
254 | * @evt_code: Last event code | |
255 | * @start: Address at which MC indicates ready for synchronisation | |
256 | * @host_time_pps: Host time at last PPS | |
88a4fb5f LE |
257 | * @adjfreq_ppb_shift: Shift required to convert scaled parts-per-billion |
258 | * frequency adjustment into a fixed point fractional nanosecond format. | |
7c236c43 | 259 | * @current_adjfreq: Current ppb adjustment. |
9aecda95 | 260 | * @phc_clock: Pointer to registered phc device (if primary function) |
7c236c43 SH |
261 | * @phc_clock_info: Registration structure for phc device |
262 | * @pps_work: pps work task for handling pps events | |
263 | * @pps_workwq: pps work queue | |
264 | * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled | |
265 | * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids | |
266 | * allocations in main data path). | |
99691c4a BH |
267 | * @good_syncs: Number of successful synchronisations. |
268 | * @fast_syncs: Number of synchronisations requiring short delay | |
269 | * @bad_syncs: Number of failed synchronisations. | |
270 | * @sync_timeouts: Number of synchronisation timeouts | |
271 | * @no_time_syncs: Number of synchronisations with no good times. | |
272 | * @invalid_sync_windows: Number of sync windows with bad durations. | |
273 | * @undersize_sync_windows: Number of corrected sync windows that are too small | |
274 | * @oversize_sync_windows: Number of corrected sync windows that are too large | |
275 | * @rx_no_timestamp: Number of packets received without a timestamp. | |
7c236c43 | 276 | * @timeset: Last set of synchronisation statistics. |
23418dc1 | 277 | * @xmit_skb: Transmit SKB function. |
7c236c43 SH |
278 | */ |
279 | struct efx_ptp_data { | |
ac36baf8 | 280 | struct efx_nic *efx; |
7c236c43 | 281 | struct efx_channel *channel; |
bd9a265d | 282 | bool rx_ts_inline; |
7c236c43 SH |
283 | struct sk_buff_head rxq; |
284 | struct sk_buff_head txq; | |
285 | struct list_head evt_list; | |
286 | struct list_head evt_free_list; | |
287 | spinlock_t evt_lock; | |
288 | struct efx_ptp_event_rx rx_evts[MAX_RECEIVE_EVENTS]; | |
289 | struct workqueue_struct *workwq; | |
290 | struct work_struct work; | |
291 | bool reset_required; | |
292 | u32 rxfilter_event; | |
293 | u32 rxfilter_general; | |
294 | bool rxfilter_installed; | |
295 | struct hwtstamp_config config; | |
296 | bool enabled; | |
297 | unsigned int mode; | |
a6f73460 LE |
298 | void (*ns_to_nic_time)(s64 ns, u32 *nic_major, u32 *nic_minor); |
299 | ktime_t (*nic_to_kernel_time)(u32 nic_major, u32 nic_minor, | |
300 | s32 correction); | |
1280c0f8 EC |
301 | struct { |
302 | u32 minor_max; | |
303 | u32 sync_event_diff_min; | |
304 | u32 sync_event_diff_max; | |
305 | unsigned int sync_event_minor_shift; | |
306 | } nic_time; | |
a6f73460 | 307 | unsigned int min_synchronisation_ns; |
88a4fb5f | 308 | unsigned int capabilities; |
a6f73460 | 309 | struct { |
04796f4c LE |
310 | s32 ptp_tx; |
311 | s32 ptp_rx; | |
a6f73460 LE |
312 | s32 pps_out; |
313 | s32 pps_in; | |
04796f4c LE |
314 | s32 general_tx; |
315 | s32 general_rx; | |
a6f73460 | 316 | } ts_corrections; |
7c236c43 SH |
317 | efx_qword_t evt_frags[MAX_EVENT_FRAGS]; |
318 | int evt_frag_idx; | |
319 | int evt_code; | |
320 | struct efx_buffer start; | |
321 | struct pps_event_time host_time_pps; | |
88a4fb5f | 322 | unsigned int adjfreq_ppb_shift; |
7c236c43 SH |
323 | s64 current_adjfreq; |
324 | struct ptp_clock *phc_clock; | |
325 | struct ptp_clock_info phc_clock_info; | |
326 | struct work_struct pps_work; | |
327 | struct workqueue_struct *pps_workwq; | |
328 | bool nic_ts_enabled; | |
aa09a3da | 329 | _MCDI_DECLARE_BUF(txbuf, MC_CMD_PTP_IN_TRANSMIT_LENMAX); |
99691c4a BH |
330 | |
331 | unsigned int good_syncs; | |
332 | unsigned int fast_syncs; | |
333 | unsigned int bad_syncs; | |
334 | unsigned int sync_timeouts; | |
335 | unsigned int no_time_syncs; | |
336 | unsigned int invalid_sync_windows; | |
337 | unsigned int undersize_sync_windows; | |
338 | unsigned int oversize_sync_windows; | |
339 | unsigned int rx_no_timestamp; | |
7c236c43 SH |
340 | struct efx_ptp_timeset |
341 | timeset[MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_MAXNUM]; | |
23418dc1 | 342 | void (*xmit_skb)(struct efx_nic *efx, struct sk_buff *skb); |
7c236c43 SH |
343 | }; |
344 | ||
345 | static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta); | |
346 | static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta); | |
0fcb5c76 | 347 | static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts); |
7c236c43 | 348 | static int efx_phc_settime(struct ptp_clock_info *ptp, |
0fcb5c76 | 349 | const struct timespec64 *e_ts); |
7c236c43 SH |
350 | static int efx_phc_enable(struct ptp_clock_info *ptp, |
351 | struct ptp_clock_request *request, int on); | |
352 | ||
9c3afb33 MH |
353 | bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx) |
354 | { | |
355 | struct efx_ef10_nic_data *nic_data = efx->nic_data; | |
356 | ||
357 | return ((efx_nic_rev(efx) >= EFX_REV_HUNT_A0) && | |
358 | (nic_data->datapath_caps2 & | |
359 | (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_MAC_TIMESTAMPING_LBN) | |
360 | )); | |
361 | } | |
362 | ||
2935e3c3 EC |
363 | /* PTP 'extra' channel is still a traffic channel, but we only create TX queues |
364 | * if PTP uses MAC TX timestamps, not if PTP uses the MC directly to transmit. | |
365 | */ | |
e7345ba3 | 366 | static bool efx_ptp_want_txqs(struct efx_channel *channel) |
2935e3c3 EC |
367 | { |
368 | return efx_ptp_use_mac_tx_timestamps(channel->efx); | |
369 | } | |
370 | ||
99691c4a BH |
371 | #define PTP_SW_STAT(ext_name, field_name) \ |
372 | { #ext_name, 0, offsetof(struct efx_ptp_data, field_name) } | |
373 | #define PTP_MC_STAT(ext_name, mcdi_name) \ | |
374 | { #ext_name, 32, MC_CMD_PTP_OUT_STATUS_STATS_ ## mcdi_name ## _OFST } | |
375 | static const struct efx_hw_stat_desc efx_ptp_stat_desc[] = { | |
376 | PTP_SW_STAT(ptp_good_syncs, good_syncs), | |
377 | PTP_SW_STAT(ptp_fast_syncs, fast_syncs), | |
378 | PTP_SW_STAT(ptp_bad_syncs, bad_syncs), | |
379 | PTP_SW_STAT(ptp_sync_timeouts, sync_timeouts), | |
380 | PTP_SW_STAT(ptp_no_time_syncs, no_time_syncs), | |
381 | PTP_SW_STAT(ptp_invalid_sync_windows, invalid_sync_windows), | |
382 | PTP_SW_STAT(ptp_undersize_sync_windows, undersize_sync_windows), | |
383 | PTP_SW_STAT(ptp_oversize_sync_windows, oversize_sync_windows), | |
384 | PTP_SW_STAT(ptp_rx_no_timestamp, rx_no_timestamp), | |
385 | PTP_MC_STAT(ptp_tx_timestamp_packets, TX), | |
386 | PTP_MC_STAT(ptp_rx_timestamp_packets, RX), | |
387 | PTP_MC_STAT(ptp_timestamp_packets, TS), | |
388 | PTP_MC_STAT(ptp_filter_matches, FM), | |
389 | PTP_MC_STAT(ptp_non_filter_matches, NFM), | |
390 | }; | |
391 | #define PTP_STAT_COUNT ARRAY_SIZE(efx_ptp_stat_desc) | |
392 | static const unsigned long efx_ptp_stat_mask[] = { | |
393 | [0 ... BITS_TO_LONGS(PTP_STAT_COUNT) - 1] = ~0UL, | |
394 | }; | |
395 | ||
396 | size_t efx_ptp_describe_stats(struct efx_nic *efx, u8 *strings) | |
397 | { | |
398 | if (!efx->ptp_data) | |
399 | return 0; | |
400 | ||
401 | return efx_nic_describe_stats(efx_ptp_stat_desc, PTP_STAT_COUNT, | |
402 | efx_ptp_stat_mask, strings); | |
403 | } | |
404 | ||
405 | size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats) | |
406 | { | |
407 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_STATUS_LEN); | |
408 | MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_STATUS_LEN); | |
409 | size_t i; | |
410 | int rc; | |
411 | ||
412 | if (!efx->ptp_data) | |
413 | return 0; | |
414 | ||
415 | /* Copy software statistics */ | |
416 | for (i = 0; i < PTP_STAT_COUNT; i++) { | |
417 | if (efx_ptp_stat_desc[i].dma_width) | |
418 | continue; | |
419 | stats[i] = *(unsigned int *)((char *)efx->ptp_data + | |
420 | efx_ptp_stat_desc[i].offset); | |
421 | } | |
422 | ||
423 | /* Fetch MC statistics. We *must* fill in all statistics or | |
424 | * risk leaking kernel memory to userland, so if the MCDI | |
425 | * request fails we pretend we got zeroes. | |
426 | */ | |
427 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_STATUS); | |
428 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); | |
429 | rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), | |
430 | outbuf, sizeof(outbuf), NULL); | |
3de1b513 | 431 | if (rc) |
99691c4a | 432 | memset(outbuf, 0, sizeof(outbuf)); |
99691c4a BH |
433 | efx_nic_update_stats(efx_ptp_stat_desc, PTP_STAT_COUNT, |
434 | efx_ptp_stat_mask, | |
435 | stats, _MCDI_PTR(outbuf, 0), false); | |
436 | ||
437 | return PTP_STAT_COUNT; | |
438 | } | |
439 | ||
a6f73460 LE |
440 | /* For Siena platforms NIC time is s and ns */ |
441 | static void efx_ptp_ns_to_s_ns(s64 ns, u32 *nic_major, u32 *nic_minor) | |
442 | { | |
090e2edb AB |
443 | struct timespec64 ts = ns_to_timespec64(ns); |
444 | *nic_major = (u32)ts.tv_sec; | |
a6f73460 LE |
445 | *nic_minor = ts.tv_nsec; |
446 | } | |
447 | ||
bd9a265d JC |
448 | static ktime_t efx_ptp_s_ns_to_ktime_correction(u32 nic_major, u32 nic_minor, |
449 | s32 correction) | |
a6f73460 LE |
450 | { |
451 | ktime_t kt = ktime_set(nic_major, nic_minor); | |
452 | if (correction >= 0) | |
453 | kt = ktime_add_ns(kt, (u64)correction); | |
454 | else | |
455 | kt = ktime_sub_ns(kt, (u64)-correction); | |
456 | return kt; | |
457 | } | |
458 | ||
459 | /* To convert from s27 format to ns we multiply then divide by a power of 2. | |
460 | * For the conversion from ns to s27, the operation is also converted to a | |
461 | * multiply and shift. | |
462 | */ | |
463 | #define S27_TO_NS_SHIFT (27) | |
464 | #define NS_TO_S27_MULT (((1ULL << 63) + NSEC_PER_SEC / 2) / NSEC_PER_SEC) | |
465 | #define NS_TO_S27_SHIFT (63 - S27_TO_NS_SHIFT) | |
466 | #define S27_MINOR_MAX (1 << S27_TO_NS_SHIFT) | |
467 | ||
468 | /* For Huntington platforms NIC time is in seconds and fractions of a second | |
469 | * where the minor register only uses 27 bits in units of 2^-27s. | |
470 | */ | |
471 | static void efx_ptp_ns_to_s27(s64 ns, u32 *nic_major, u32 *nic_minor) | |
472 | { | |
090e2edb AB |
473 | struct timespec64 ts = ns_to_timespec64(ns); |
474 | u32 maj = (u32)ts.tv_sec; | |
a6f73460 LE |
475 | u32 min = (u32)(((u64)ts.tv_nsec * NS_TO_S27_MULT + |
476 | (1ULL << (NS_TO_S27_SHIFT - 1))) >> NS_TO_S27_SHIFT); | |
477 | ||
478 | /* The conversion can result in the minor value exceeding the maximum. | |
479 | * In this case, round up to the next second. | |
480 | */ | |
481 | if (min >= S27_MINOR_MAX) { | |
482 | min -= S27_MINOR_MAX; | |
483 | maj++; | |
484 | } | |
485 | ||
486 | *nic_major = maj; | |
487 | *nic_minor = min; | |
488 | } | |
489 | ||
bd9a265d | 490 | static inline ktime_t efx_ptp_s27_to_ktime(u32 nic_major, u32 nic_minor) |
a6f73460 | 491 | { |
bd9a265d JC |
492 | u32 ns = (u32)(((u64)nic_minor * NSEC_PER_SEC + |
493 | (1ULL << (S27_TO_NS_SHIFT - 1))) >> S27_TO_NS_SHIFT); | |
494 | return ktime_set(nic_major, ns); | |
495 | } | |
a6f73460 | 496 | |
bd9a265d JC |
497 | static ktime_t efx_ptp_s27_to_ktime_correction(u32 nic_major, u32 nic_minor, |
498 | s32 correction) | |
499 | { | |
a6f73460 LE |
500 | /* Apply the correction and deal with carry */ |
501 | nic_minor += correction; | |
502 | if ((s32)nic_minor < 0) { | |
503 | nic_minor += S27_MINOR_MAX; | |
504 | nic_major--; | |
505 | } else if (nic_minor >= S27_MINOR_MAX) { | |
506 | nic_minor -= S27_MINOR_MAX; | |
507 | nic_major++; | |
508 | } | |
509 | ||
bd9a265d | 510 | return efx_ptp_s27_to_ktime(nic_major, nic_minor); |
a6f73460 LE |
511 | } |
512 | ||
1280c0f8 EC |
513 | /* For Medford2 platforms the time is in seconds and quarter nanoseconds. */ |
514 | static void efx_ptp_ns_to_s_qns(s64 ns, u32 *nic_major, u32 *nic_minor) | |
515 | { | |
516 | struct timespec64 ts = ns_to_timespec64(ns); | |
517 | ||
518 | *nic_major = (u32)ts.tv_sec; | |
519 | *nic_minor = ts.tv_nsec * 4; | |
520 | } | |
521 | ||
522 | static ktime_t efx_ptp_s_qns_to_ktime_correction(u32 nic_major, u32 nic_minor, | |
523 | s32 correction) | |
524 | { | |
525 | ktime_t kt; | |
526 | ||
527 | nic_minor = DIV_ROUND_CLOSEST(nic_minor, 4); | |
528 | correction = DIV_ROUND_CLOSEST(correction, 4); | |
529 | ||
530 | kt = ktime_set(nic_major, nic_minor); | |
531 | ||
532 | if (correction >= 0) | |
533 | kt = ktime_add_ns(kt, (u64)correction); | |
534 | else | |
535 | kt = ktime_sub_ns(kt, (u64)-correction); | |
536 | return kt; | |
537 | } | |
538 | ||
c1d0d339 MH |
539 | struct efx_channel *efx_ptp_channel(struct efx_nic *efx) |
540 | { | |
541 | return efx->ptp_data ? efx->ptp_data->channel : NULL; | |
542 | } | |
543 | ||
544 | static u32 last_sync_timestamp_major(struct efx_nic *efx) | |
545 | { | |
546 | struct efx_channel *channel = efx_ptp_channel(efx); | |
547 | u32 major = 0; | |
548 | ||
549 | if (channel) | |
550 | major = channel->sync_timestamp_major; | |
551 | return major; | |
552 | } | |
553 | ||
554 | /* The 8000 series and later can provide the time from the MAC, which is only | |
555 | * 48 bits long and provides meta-information in the top 2 bits. | |
556 | */ | |
557 | static ktime_t | |
1280c0f8 EC |
558 | efx_ptp_mac_nic_to_ktime_correction(struct efx_nic *efx, |
559 | struct efx_ptp_data *ptp, | |
c1d0d339 MH |
560 | u32 nic_major, u32 nic_minor, |
561 | s32 correction) | |
562 | { | |
23797b98 | 563 | u32 sync_timestamp; |
c1d0d339 | 564 | ktime_t kt = { 0 }; |
23797b98 | 565 | s16 delta; |
c1d0d339 MH |
566 | |
567 | if (!(nic_major & 0x80000000)) { | |
568 | WARN_ON_ONCE(nic_major >> 16); | |
23797b98 AM |
569 | |
570 | /* Medford provides 48 bits of timestamp, so we must get the top | |
571 | * 16 bits from the timesync event state. | |
572 | * | |
573 | * We only have the lower 16 bits of the time now, but we do | |
574 | * have a full resolution timestamp at some point in past. As | |
575 | * long as the difference between the (real) now and the sync | |
576 | * is less than 2^15, then we can reconstruct the difference | |
577 | * between those two numbers using only the lower 16 bits of | |
578 | * each. | |
579 | * | |
580 | * Put another way | |
581 | * | |
582 | * a - b = ((a mod k) - b) mod k | |
583 | * | |
584 | * when -k/2 < (a-b) < k/2. In our case k is 2^16. We know | |
585 | * (a mod k) and b, so can calculate the delta, a - b. | |
586 | * | |
587 | */ | |
588 | sync_timestamp = last_sync_timestamp_major(efx); | |
589 | ||
590 | /* Because delta is s16 this does an implicit mask down to | |
591 | * 16 bits which is what we need, assuming | |
592 | * MEDFORD_TX_SECS_EVENT_BITS is 16. delta is signed so that | |
593 | * we can deal with the (unlikely) case of sync timestamps | |
594 | * arriving from the future. | |
595 | */ | |
596 | delta = nic_major - sync_timestamp; | |
597 | ||
598 | /* Recover the fully specified time now, by applying the offset | |
599 | * to the (fully specified) sync time. | |
600 | */ | |
601 | nic_major = sync_timestamp + delta; | |
c1d0d339 | 602 | |
1280c0f8 EC |
603 | kt = ptp->nic_to_kernel_time(nic_major, nic_minor, |
604 | correction); | |
c1d0d339 MH |
605 | } |
606 | return kt; | |
607 | } | |
608 | ||
b9b603d4 MH |
609 | ktime_t efx_ptp_nic_to_kernel_time(struct efx_tx_queue *tx_queue) |
610 | { | |
611 | struct efx_nic *efx = tx_queue->efx; | |
612 | struct efx_ptp_data *ptp = efx->ptp_data; | |
613 | ktime_t kt; | |
614 | ||
c1d0d339 | 615 | if (efx_ptp_use_mac_tx_timestamps(efx)) |
1280c0f8 | 616 | kt = efx_ptp_mac_nic_to_ktime_correction(efx, ptp, |
c1d0d339 | 617 | tx_queue->completed_timestamp_major, |
04796f4c LE |
618 | tx_queue->completed_timestamp_minor, |
619 | ptp->ts_corrections.general_tx); | |
c1d0d339 MH |
620 | else |
621 | kt = ptp->nic_to_kernel_time( | |
622 | tx_queue->completed_timestamp_major, | |
04796f4c LE |
623 | tx_queue->completed_timestamp_minor, |
624 | ptp->ts_corrections.general_tx); | |
b9b603d4 MH |
625 | return kt; |
626 | } | |
627 | ||
a6f73460 LE |
628 | /* Get PTP attributes and set up time conversions */ |
629 | static int efx_ptp_get_attributes(struct efx_nic *efx) | |
630 | { | |
631 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_GET_ATTRIBUTES_LEN); | |
632 | MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_ATTRIBUTES_LEN); | |
633 | struct efx_ptp_data *ptp = efx->ptp_data; | |
634 | int rc; | |
635 | u32 fmt; | |
636 | size_t out_len; | |
637 | ||
638 | /* Get the PTP attributes. If the NIC doesn't support the operation we | |
639 | * use the default format for compatibility with older NICs i.e. | |
640 | * seconds and nanoseconds. | |
641 | */ | |
642 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_GET_ATTRIBUTES); | |
643 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); | |
3de1b513 EC |
644 | rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), |
645 | outbuf, sizeof(outbuf), &out_len); | |
646 | if (rc == 0) { | |
a6f73460 | 647 | fmt = MCDI_DWORD(outbuf, PTP_OUT_GET_ATTRIBUTES_TIME_FORMAT); |
3de1b513 | 648 | } else if (rc == -EINVAL) { |
a6f73460 | 649 | fmt = MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_NANOSECONDS; |
3de1b513 EC |
650 | } else if (rc == -EPERM) { |
651 | netif_info(efx, probe, efx->net_dev, "no PTP support\n"); | |
a6f73460 | 652 | return rc; |
3de1b513 EC |
653 | } else { |
654 | efx_mcdi_display_error(efx, MC_CMD_PTP, sizeof(inbuf), | |
655 | outbuf, sizeof(outbuf), rc); | |
656 | return rc; | |
657 | } | |
a6f73460 | 658 | |
1280c0f8 EC |
659 | switch (fmt) { |
660 | case MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_27FRACTION: | |
a6f73460 | 661 | ptp->ns_to_nic_time = efx_ptp_ns_to_s27; |
bd9a265d | 662 | ptp->nic_to_kernel_time = efx_ptp_s27_to_ktime_correction; |
1280c0f8 EC |
663 | ptp->nic_time.minor_max = 1 << 27; |
664 | ptp->nic_time.sync_event_minor_shift = 19; | |
665 | break; | |
666 | case MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_NANOSECONDS: | |
a6f73460 | 667 | ptp->ns_to_nic_time = efx_ptp_ns_to_s_ns; |
bd9a265d | 668 | ptp->nic_to_kernel_time = efx_ptp_s_ns_to_ktime_correction; |
1280c0f8 EC |
669 | ptp->nic_time.minor_max = 1000000000; |
670 | ptp->nic_time.sync_event_minor_shift = 22; | |
671 | break; | |
672 | case MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_QTR_NANOSECONDS: | |
673 | ptp->ns_to_nic_time = efx_ptp_ns_to_s_qns; | |
674 | ptp->nic_to_kernel_time = efx_ptp_s_qns_to_ktime_correction; | |
5b09179e | 675 | ptp->nic_time.minor_max = 4000000000UL; |
1280c0f8 EC |
676 | ptp->nic_time.sync_event_minor_shift = 24; |
677 | break; | |
678 | default: | |
a6f73460 LE |
679 | return -ERANGE; |
680 | } | |
681 | ||
1280c0f8 EC |
682 | /* Precalculate acceptable difference between the minor time in the |
683 | * packet prefix and the last MCDI time sync event. We expect the | |
684 | * packet prefix timestamp to be after of sync event by up to one | |
685 | * sync event interval (0.25s) but we allow it to exceed this by a | |
686 | * fuzz factor of (0.1s) | |
687 | */ | |
688 | ptp->nic_time.sync_event_diff_min = ptp->nic_time.minor_max | |
689 | - (ptp->nic_time.minor_max / 10); | |
690 | ptp->nic_time.sync_event_diff_max = (ptp->nic_time.minor_max / 4) | |
691 | + (ptp->nic_time.minor_max / 10); | |
692 | ||
693 | /* MC_CMD_PTP_OP_GET_ATTRIBUTES has been extended twice from an older | |
694 | * operation MC_CMD_PTP_OP_GET_TIME_FORMAT. The function now may return | |
695 | * a value to use for the minimum acceptable corrected synchronization | |
696 | * window and may return further capabilities. | |
a6f73460 LE |
697 | * If we have the extra information store it. For older firmware that |
698 | * does not implement the extended command use the default value. | |
699 | */ | |
1280c0f8 EC |
700 | if (rc == 0 && |
701 | out_len >= MC_CMD_PTP_OUT_GET_ATTRIBUTES_CAPABILITIES_OFST) | |
a6f73460 LE |
702 | ptp->min_synchronisation_ns = |
703 | MCDI_DWORD(outbuf, | |
704 | PTP_OUT_GET_ATTRIBUTES_SYNC_WINDOW_MIN); | |
705 | else | |
706 | ptp->min_synchronisation_ns = DEFAULT_MIN_SYNCHRONISATION_NS; | |
707 | ||
88a4fb5f LE |
708 | if (rc == 0 && |
709 | out_len >= MC_CMD_PTP_OUT_GET_ATTRIBUTES_LEN) | |
710 | ptp->capabilities = MCDI_DWORD(outbuf, | |
711 | PTP_OUT_GET_ATTRIBUTES_CAPABILITIES); | |
712 | else | |
713 | ptp->capabilities = 0; | |
714 | ||
715 | /* Set up the shift for conversion between frequency | |
716 | * adjustments in parts-per-billion and the fixed-point | |
717 | * fractional ns format that the adapter uses. | |
718 | */ | |
719 | if (ptp->capabilities & (1 << MC_CMD_PTP_OUT_GET_ATTRIBUTES_FP44_FREQ_ADJ_LBN)) | |
720 | ptp->adjfreq_ppb_shift = PPB_SHIFT_FP44; | |
721 | else | |
722 | ptp->adjfreq_ppb_shift = PPB_SHIFT_FP40; | |
723 | ||
a6f73460 LE |
724 | return 0; |
725 | } | |
726 | ||
727 | /* Get PTP timestamp corrections */ | |
728 | static int efx_ptp_get_timestamp_corrections(struct efx_nic *efx) | |
729 | { | |
730 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_GET_TIMESTAMP_CORRECTIONS_LEN); | |
04796f4c | 731 | MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_LEN); |
a6f73460 | 732 | int rc; |
04796f4c | 733 | size_t out_len; |
a6f73460 LE |
734 | |
735 | /* Get the timestamp corrections from the NIC. If this operation is | |
736 | * not supported (older NICs) then no correction is required. | |
737 | */ | |
738 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, | |
739 | MC_CMD_PTP_OP_GET_TIMESTAMP_CORRECTIONS); | |
740 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); | |
741 | ||
3de1b513 | 742 | rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), |
04796f4c | 743 | outbuf, sizeof(outbuf), &out_len); |
a6f73460 | 744 | if (rc == 0) { |
04796f4c | 745 | efx->ptp_data->ts_corrections.ptp_tx = MCDI_DWORD(outbuf, |
a6f73460 | 746 | PTP_OUT_GET_TIMESTAMP_CORRECTIONS_TRANSMIT); |
04796f4c | 747 | efx->ptp_data->ts_corrections.ptp_rx = MCDI_DWORD(outbuf, |
a6f73460 LE |
748 | PTP_OUT_GET_TIMESTAMP_CORRECTIONS_RECEIVE); |
749 | efx->ptp_data->ts_corrections.pps_out = MCDI_DWORD(outbuf, | |
750 | PTP_OUT_GET_TIMESTAMP_CORRECTIONS_PPS_OUT); | |
751 | efx->ptp_data->ts_corrections.pps_in = MCDI_DWORD(outbuf, | |
752 | PTP_OUT_GET_TIMESTAMP_CORRECTIONS_PPS_IN); | |
04796f4c LE |
753 | |
754 | if (out_len >= MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_LEN) { | |
755 | efx->ptp_data->ts_corrections.general_tx = MCDI_DWORD( | |
756 | outbuf, | |
757 | PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_GENERAL_TX); | |
758 | efx->ptp_data->ts_corrections.general_rx = MCDI_DWORD( | |
759 | outbuf, | |
760 | PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_GENERAL_RX); | |
761 | } else { | |
762 | efx->ptp_data->ts_corrections.general_tx = | |
763 | efx->ptp_data->ts_corrections.ptp_tx; | |
764 | efx->ptp_data->ts_corrections.general_rx = | |
765 | efx->ptp_data->ts_corrections.ptp_rx; | |
766 | } | |
a6f73460 | 767 | } else if (rc == -EINVAL) { |
04796f4c LE |
768 | efx->ptp_data->ts_corrections.ptp_tx = 0; |
769 | efx->ptp_data->ts_corrections.ptp_rx = 0; | |
a6f73460 LE |
770 | efx->ptp_data->ts_corrections.pps_out = 0; |
771 | efx->ptp_data->ts_corrections.pps_in = 0; | |
04796f4c LE |
772 | efx->ptp_data->ts_corrections.general_tx = 0; |
773 | efx->ptp_data->ts_corrections.general_rx = 0; | |
a6f73460 | 774 | } else { |
3de1b513 EC |
775 | efx_mcdi_display_error(efx, MC_CMD_PTP, sizeof(inbuf), outbuf, |
776 | sizeof(outbuf), rc); | |
a6f73460 LE |
777 | return rc; |
778 | } | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
7c236c43 SH |
783 | /* Enable MCDI PTP support. */ |
784 | static int efx_ptp_enable(struct efx_nic *efx) | |
785 | { | |
59cfc479 | 786 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_ENABLE_LEN); |
aa09a3da | 787 | MCDI_DECLARE_BUF_ERR(outbuf); |
1e0b8120 | 788 | int rc; |
7c236c43 SH |
789 | |
790 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ENABLE); | |
c1d828bd | 791 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); |
7c236c43 | 792 | MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_QUEUE, |
ac36baf8 BH |
793 | efx->ptp_data->channel ? |
794 | efx->ptp_data->channel->channel : 0); | |
7c236c43 SH |
795 | MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_MODE, efx->ptp_data->mode); |
796 | ||
1e0b8120 EC |
797 | rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), |
798 | outbuf, sizeof(outbuf), NULL); | |
799 | rc = (rc == -EALREADY) ? 0 : rc; | |
800 | if (rc) | |
801 | efx_mcdi_display_error(efx, MC_CMD_PTP, | |
802 | MC_CMD_PTP_IN_ENABLE_LEN, | |
803 | outbuf, sizeof(outbuf), rc); | |
804 | return rc; | |
7c236c43 SH |
805 | } |
806 | ||
807 | /* Disable MCDI PTP support. | |
808 | * | |
809 | * Note that this function should never rely on the presence of ptp_data - | |
810 | * may be called before that exists. | |
811 | */ | |
812 | static int efx_ptp_disable(struct efx_nic *efx) | |
813 | { | |
59cfc479 | 814 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_DISABLE_LEN); |
aa09a3da | 815 | MCDI_DECLARE_BUF_ERR(outbuf); |
1e0b8120 | 816 | int rc; |
7c236c43 SH |
817 | |
818 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_DISABLE); | |
c1d828bd | 819 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); |
1e0b8120 EC |
820 | rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), |
821 | outbuf, sizeof(outbuf), NULL); | |
822 | rc = (rc == -EALREADY) ? 0 : rc; | |
b1336389 EC |
823 | /* If we get ENOSYS, the NIC doesn't support PTP, and thus this function |
824 | * should only have been called during probe. | |
825 | */ | |
826 | if (rc == -ENOSYS || rc == -EPERM) | |
827 | netif_info(efx, probe, efx->net_dev, "no PTP support\n"); | |
828 | else if (rc) | |
1e0b8120 EC |
829 | efx_mcdi_display_error(efx, MC_CMD_PTP, |
830 | MC_CMD_PTP_IN_DISABLE_LEN, | |
831 | outbuf, sizeof(outbuf), rc); | |
832 | return rc; | |
7c236c43 SH |
833 | } |
834 | ||
835 | static void efx_ptp_deliver_rx_queue(struct sk_buff_head *q) | |
836 | { | |
837 | struct sk_buff *skb; | |
838 | ||
839 | while ((skb = skb_dequeue(q))) { | |
840 | local_bh_disable(); | |
841 | netif_receive_skb(skb); | |
842 | local_bh_enable(); | |
843 | } | |
844 | } | |
845 | ||
846 | static void efx_ptp_handle_no_channel(struct efx_nic *efx) | |
847 | { | |
848 | netif_err(efx, drv, efx->net_dev, | |
849 | "ERROR: PTP requires MSI-X and 1 additional interrupt" | |
850 | "vector. PTP disabled\n"); | |
851 | } | |
852 | ||
853 | /* Repeatedly send the host time to the MC which will capture the hardware | |
854 | * time. | |
855 | */ | |
856 | static void efx_ptp_send_times(struct efx_nic *efx, | |
857 | struct pps_event_time *last_time) | |
858 | { | |
859 | struct pps_event_time now; | |
ade1bdff | 860 | struct timespec64 limit; |
7c236c43 | 861 | struct efx_ptp_data *ptp = efx->ptp_data; |
7c236c43 SH |
862 | int *mc_running = ptp->start.addr; |
863 | ||
864 | pps_get_ts(&now); | |
7c236c43 | 865 | limit = now.ts_real; |
ade1bdff | 866 | timespec64_add_ns(&limit, SYNCHRONISE_PERIOD_NS); |
7c236c43 SH |
867 | |
868 | /* Write host time for specified period or until MC is done */ | |
ade1bdff | 869 | while ((timespec64_compare(&now.ts_real, &limit) < 0) && |
6aa7de05 | 870 | READ_ONCE(*mc_running)) { |
ade1bdff | 871 | struct timespec64 update_time; |
7c236c43 SH |
872 | unsigned int host_time; |
873 | ||
874 | /* Don't update continuously to avoid saturating the PCIe bus */ | |
875 | update_time = now.ts_real; | |
ade1bdff | 876 | timespec64_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS); |
7c236c43 SH |
877 | do { |
878 | pps_get_ts(&now); | |
ade1bdff | 879 | } while ((timespec64_compare(&now.ts_real, &update_time) < 0) && |
6aa7de05 | 880 | READ_ONCE(*mc_running)); |
7c236c43 SH |
881 | |
882 | /* Synchronise NIC with single word of time only */ | |
883 | host_time = (now.ts_real.tv_sec << MC_NANOSECOND_BITS | | |
884 | now.ts_real.tv_nsec); | |
885 | /* Update host time in NIC memory */ | |
977a5d5d | 886 | efx->type->ptp_write_host_time(efx, host_time); |
7c236c43 SH |
887 | } |
888 | *last_time = now; | |
889 | } | |
890 | ||
891 | /* Read a timeset from the MC's results and partial process. */ | |
c5bb0e98 BH |
892 | static void efx_ptp_read_timeset(MCDI_DECLARE_STRUCT_PTR(data), |
893 | struct efx_ptp_timeset *timeset) | |
7c236c43 SH |
894 | { |
895 | unsigned start_ns, end_ns; | |
896 | ||
897 | timeset->host_start = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTSTART); | |
a6f73460 LE |
898 | timeset->major = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_MAJOR); |
899 | timeset->minor = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_MINOR); | |
7c236c43 | 900 | timeset->host_end = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTEND), |
a6f73460 | 901 | timeset->wait = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS); |
7c236c43 SH |
902 | |
903 | /* Ignore seconds */ | |
904 | start_ns = timeset->host_start & MC_NANOSECOND_MASK; | |
905 | end_ns = timeset->host_end & MC_NANOSECOND_MASK; | |
906 | /* Allow for rollover */ | |
907 | if (end_ns < start_ns) | |
908 | end_ns += NSEC_PER_SEC; | |
909 | /* Determine duration of operation */ | |
910 | timeset->window = end_ns - start_ns; | |
911 | } | |
912 | ||
913 | /* Process times received from MC. | |
914 | * | |
915 | * Extract times from returned results, and establish the minimum value | |
916 | * seen. The minimum value represents the "best" possible time and events | |
917 | * too much greater than this are rejected - the machine is, perhaps, too | |
918 | * busy. A number of readings are taken so that, hopefully, at least one good | |
919 | * synchronisation will be seen in the results. | |
920 | */ | |
c5bb0e98 BH |
921 | static int |
922 | efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), | |
923 | size_t response_length, | |
924 | const struct pps_event_time *last_time) | |
7c236c43 | 925 | { |
c5bb0e98 BH |
926 | unsigned number_readings = |
927 | MCDI_VAR_ARRAY_LEN(response_length, | |
928 | PTP_OUT_SYNCHRONIZE_TIMESET); | |
7c236c43 | 929 | unsigned i; |
7c236c43 SH |
930 | unsigned ngood = 0; |
931 | unsigned last_good = 0; | |
932 | struct efx_ptp_data *ptp = efx->ptp_data; | |
7c236c43 SH |
933 | u32 last_sec; |
934 | u32 start_sec; | |
ade1bdff | 935 | struct timespec64 delta; |
a6f73460 | 936 | ktime_t mc_time; |
7c236c43 SH |
937 | |
938 | if (number_readings == 0) | |
939 | return -EAGAIN; | |
940 | ||
dfd8d581 LE |
941 | /* Read the set of results and find the last good host-MC |
942 | * synchronization result. The MC times when it finishes reading the | |
943 | * host time so the corrected window time should be fairly constant | |
99691c4a BH |
944 | * for a given platform. Increment stats for any results that appear |
945 | * to be erroneous. | |
7c236c43 SH |
946 | */ |
947 | for (i = 0; i < number_readings; i++) { | |
dfd8d581 | 948 | s32 window, corrected; |
090e2edb | 949 | struct timespec64 wait; |
dfd8d581 | 950 | |
c5bb0e98 BH |
951 | efx_ptp_read_timeset( |
952 | MCDI_ARRAY_STRUCT_PTR(synch_buf, | |
953 | PTP_OUT_SYNCHRONIZE_TIMESET, i), | |
954 | &ptp->timeset[i]); | |
7c236c43 | 955 | |
090e2edb | 956 | wait = ktime_to_timespec64( |
a6f73460 | 957 | ptp->nic_to_kernel_time(0, ptp->timeset[i].wait, 0)); |
dfd8d581 | 958 | window = ptp->timeset[i].window; |
a6f73460 | 959 | corrected = window - wait.tv_nsec; |
dfd8d581 LE |
960 | |
961 | /* We expect the uncorrected synchronization window to be at | |
962 | * least as large as the interval between host start and end | |
963 | * times. If it is smaller than this then this is mostly likely | |
964 | * to be a consequence of the host's time being adjusted. | |
965 | * Check that the corrected sync window is in a reasonable | |
966 | * range. If it is out of range it is likely to be because an | |
967 | * interrupt or other delay occurred between reading the system | |
968 | * time and writing it to MC memory. | |
969 | */ | |
99691c4a BH |
970 | if (window < SYNCHRONISATION_GRANULARITY_NS) { |
971 | ++ptp->invalid_sync_windows; | |
972 | } else if (corrected >= MAX_SYNCHRONISATION_NS) { | |
99691c4a | 973 | ++ptp->oversize_sync_windows; |
13c92e82 BH |
974 | } else if (corrected < ptp->min_synchronisation_ns) { |
975 | ++ptp->undersize_sync_windows; | |
99691c4a | 976 | } else { |
dfd8d581 LE |
977 | ngood++; |
978 | last_good = i; | |
7c236c43 | 979 | } |
dfd8d581 | 980 | } |
7c236c43 SH |
981 | |
982 | if (ngood == 0) { | |
983 | netif_warn(efx, drv, efx->net_dev, | |
94cd60d0 | 984 | "PTP no suitable synchronisations\n"); |
7c236c43 SH |
985 | return -EAGAIN; |
986 | } | |
987 | ||
92d8f766 BH |
988 | /* Calculate delay from last good sync (host time) to last_time. |
989 | * It is possible that the seconds rolled over between taking | |
7c236c43 SH |
990 | * the start reading and the last value written by the host. The |
991 | * timescales are such that a gap of more than one second is never | |
92d8f766 | 992 | * expected. delta is *not* normalised. |
7c236c43 SH |
993 | */ |
994 | start_sec = ptp->timeset[last_good].host_start >> MC_NANOSECOND_BITS; | |
995 | last_sec = last_time->ts_real.tv_sec & MC_SECOND_MASK; | |
92d8f766 BH |
996 | if (start_sec != last_sec && |
997 | ((start_sec + 1) & MC_SECOND_MASK) != last_sec) { | |
998 | netif_warn(efx, hw, efx->net_dev, | |
999 | "PTP bad synchronisation seconds\n"); | |
1000 | return -EAGAIN; | |
7c236c43 | 1001 | } |
92d8f766 BH |
1002 | delta.tv_sec = (last_sec - start_sec) & 1; |
1003 | delta.tv_nsec = | |
1004 | last_time->ts_real.tv_nsec - | |
1005 | (ptp->timeset[last_good].host_start & MC_NANOSECOND_MASK); | |
1006 | ||
1007 | /* Convert the NIC time at last good sync into kernel time. | |
1008 | * No correction is required - this time is the output of a | |
1009 | * firmware process. | |
1010 | */ | |
1011 | mc_time = ptp->nic_to_kernel_time(ptp->timeset[last_good].major, | |
1012 | ptp->timeset[last_good].minor, 0); | |
1013 | ||
1014 | /* Calculate delay from NIC top of second to last_time */ | |
090e2edb | 1015 | delta.tv_nsec += ktime_to_timespec64(mc_time).tv_nsec; |
7c236c43 | 1016 | |
92d8f766 | 1017 | /* Set PPS timestamp to match NIC top of second */ |
7c236c43 SH |
1018 | ptp->host_time_pps = *last_time; |
1019 | pps_sub_ts(&ptp->host_time_pps, delta); | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /* Synchronize times between the host and the MC */ | |
1025 | static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings) | |
1026 | { | |
1027 | struct efx_ptp_data *ptp = efx->ptp_data; | |
59cfc479 | 1028 | MCDI_DECLARE_BUF(synch_buf, MC_CMD_PTP_OUT_SYNCHRONIZE_LENMAX); |
7c236c43 SH |
1029 | size_t response_length; |
1030 | int rc; | |
1031 | unsigned long timeout; | |
1032 | struct pps_event_time last_time = {}; | |
1033 | unsigned int loops = 0; | |
1034 | int *start = ptp->start.addr; | |
1035 | ||
1036 | MCDI_SET_DWORD(synch_buf, PTP_IN_OP, MC_CMD_PTP_OP_SYNCHRONIZE); | |
c1d828bd | 1037 | MCDI_SET_DWORD(synch_buf, PTP_IN_PERIPH_ID, 0); |
7c236c43 SH |
1038 | MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_NUMTIMESETS, |
1039 | num_readings); | |
338f74df BH |
1040 | MCDI_SET_QWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR, |
1041 | ptp->start.dma_addr); | |
7c236c43 SH |
1042 | |
1043 | /* Clear flag that signals MC ready */ | |
6aa7de05 | 1044 | WRITE_ONCE(*start, 0); |
df2cd8af BH |
1045 | rc = efx_mcdi_rpc_start(efx, MC_CMD_PTP, synch_buf, |
1046 | MC_CMD_PTP_IN_SYNCHRONIZE_LEN); | |
e01b16a7 | 1047 | EFX_WARN_ON_ONCE_PARANOID(rc); |
7c236c43 SH |
1048 | |
1049 | /* Wait for start from MCDI (or timeout) */ | |
1050 | timeout = jiffies + msecs_to_jiffies(MAX_SYNCHRONISE_WAIT_MS); | |
6aa7de05 | 1051 | while (!READ_ONCE(*start) && (time_before(jiffies, timeout))) { |
7c236c43 SH |
1052 | udelay(20); /* Usually start MCDI execution quickly */ |
1053 | loops++; | |
1054 | } | |
1055 | ||
99691c4a BH |
1056 | if (loops <= 1) |
1057 | ++ptp->fast_syncs; | |
1058 | if (!time_before(jiffies, timeout)) | |
1059 | ++ptp->sync_timeouts; | |
1060 | ||
6aa7de05 | 1061 | if (READ_ONCE(*start)) |
7c236c43 SH |
1062 | efx_ptp_send_times(efx, &last_time); |
1063 | ||
1064 | /* Collect results */ | |
1065 | rc = efx_mcdi_rpc_finish(efx, MC_CMD_PTP, | |
1066 | MC_CMD_PTP_IN_SYNCHRONIZE_LEN, | |
1067 | synch_buf, sizeof(synch_buf), | |
1068 | &response_length); | |
99691c4a | 1069 | if (rc == 0) { |
7c236c43 SH |
1070 | rc = efx_ptp_process_times(efx, synch_buf, response_length, |
1071 | &last_time); | |
99691c4a BH |
1072 | if (rc == 0) |
1073 | ++ptp->good_syncs; | |
1074 | else | |
1075 | ++ptp->no_time_syncs; | |
1076 | } | |
1077 | ||
1078 | /* Increment the bad syncs counter if the synchronize fails, whatever | |
1079 | * the reason. | |
1080 | */ | |
1081 | if (rc != 0) | |
1082 | ++ptp->bad_syncs; | |
7c236c43 SH |
1083 | |
1084 | return rc; | |
1085 | } | |
1086 | ||
23418dc1 MH |
1087 | /* Transmit a PTP packet via the dedicated hardware timestamped queue. */ |
1088 | static void efx_ptp_xmit_skb_queue(struct efx_nic *efx, struct sk_buff *skb) | |
1089 | { | |
1090 | struct efx_ptp_data *ptp_data = efx->ptp_data; | |
1091 | struct efx_tx_queue *tx_queue; | |
1092 | u8 type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OFFLOAD : 0; | |
1093 | ||
1094 | tx_queue = &ptp_data->channel->tx_queue[type]; | |
1095 | if (tx_queue && tx_queue->timestamping) { | |
1096 | efx_enqueue_skb(tx_queue, skb); | |
1097 | } else { | |
1098 | WARN_ONCE(1, "PTP channel has no timestamped tx queue\n"); | |
1099 | dev_kfree_skb_any(skb); | |
1100 | } | |
1101 | } | |
1102 | ||
7c236c43 | 1103 | /* Transmit a PTP packet, via the MCDI interface, to the wire. */ |
23418dc1 | 1104 | static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb) |
7c236c43 | 1105 | { |
c5bb0e98 | 1106 | struct efx_ptp_data *ptp_data = efx->ptp_data; |
7c236c43 SH |
1107 | struct skb_shared_hwtstamps timestamps; |
1108 | int rc = -EIO; | |
59cfc479 | 1109 | MCDI_DECLARE_BUF(txtime, MC_CMD_PTP_OUT_TRANSMIT_LEN); |
9528b921 | 1110 | size_t len; |
7c236c43 | 1111 | |
c5bb0e98 | 1112 | MCDI_SET_DWORD(ptp_data->txbuf, PTP_IN_OP, MC_CMD_PTP_OP_TRANSMIT); |
c1d828bd | 1113 | MCDI_SET_DWORD(ptp_data->txbuf, PTP_IN_PERIPH_ID, 0); |
c5bb0e98 | 1114 | MCDI_SET_DWORD(ptp_data->txbuf, PTP_IN_TRANSMIT_LENGTH, skb->len); |
7c236c43 SH |
1115 | if (skb_shinfo(skb)->nr_frags != 0) { |
1116 | rc = skb_linearize(skb); | |
1117 | if (rc != 0) | |
1118 | goto fail; | |
1119 | } | |
1120 | ||
1121 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
1122 | rc = skb_checksum_help(skb); | |
1123 | if (rc != 0) | |
1124 | goto fail; | |
1125 | } | |
1126 | skb_copy_from_linear_data(skb, | |
c5bb0e98 BH |
1127 | MCDI_PTR(ptp_data->txbuf, |
1128 | PTP_IN_TRANSMIT_PACKET), | |
9528b921 BH |
1129 | skb->len); |
1130 | rc = efx_mcdi_rpc(efx, MC_CMD_PTP, | |
1131 | ptp_data->txbuf, MC_CMD_PTP_IN_TRANSMIT_LEN(skb->len), | |
1132 | txtime, sizeof(txtime), &len); | |
7c236c43 SH |
1133 | if (rc != 0) |
1134 | goto fail; | |
1135 | ||
1136 | memset(×tamps, 0, sizeof(timestamps)); | |
a6f73460 LE |
1137 | timestamps.hwtstamp = ptp_data->nic_to_kernel_time( |
1138 | MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_MAJOR), | |
1139 | MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_MINOR), | |
04796f4c | 1140 | ptp_data->ts_corrections.ptp_tx); |
7c236c43 SH |
1141 | |
1142 | skb_tstamp_tx(skb, ×tamps); | |
1143 | ||
1144 | rc = 0; | |
1145 | ||
1146 | fail: | |
23418dc1 | 1147 | dev_kfree_skb_any(skb); |
7c236c43 | 1148 | |
23418dc1 | 1149 | return; |
7c236c43 SH |
1150 | } |
1151 | ||
1152 | static void efx_ptp_drop_time_expired_events(struct efx_nic *efx) | |
1153 | { | |
1154 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1155 | struct list_head *cursor; | |
1156 | struct list_head *next; | |
1157 | ||
bd9a265d JC |
1158 | if (ptp->rx_ts_inline) |
1159 | return; | |
1160 | ||
7c236c43 SH |
1161 | /* Drop time-expired events */ |
1162 | spin_lock_bh(&ptp->evt_lock); | |
1163 | if (!list_empty(&ptp->evt_list)) { | |
1164 | list_for_each_safe(cursor, next, &ptp->evt_list) { | |
1165 | struct efx_ptp_event_rx *evt; | |
1166 | ||
1167 | evt = list_entry(cursor, struct efx_ptp_event_rx, | |
1168 | link); | |
1169 | if (time_after(jiffies, evt->expiry)) { | |
9545f4e2 | 1170 | list_move(&evt->link, &ptp->evt_free_list); |
7c236c43 SH |
1171 | netif_warn(efx, hw, efx->net_dev, |
1172 | "PTP rx event dropped\n"); | |
1173 | } | |
1174 | } | |
1175 | } | |
1176 | spin_unlock_bh(&ptp->evt_lock); | |
1177 | } | |
1178 | ||
1179 | static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx, | |
1180 | struct sk_buff *skb) | |
1181 | { | |
1182 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1183 | bool evts_waiting; | |
1184 | struct list_head *cursor; | |
1185 | struct list_head *next; | |
1186 | struct efx_ptp_match *match; | |
1187 | enum ptp_packet_state rc = PTP_PACKET_STATE_UNMATCHED; | |
1188 | ||
bd9a265d JC |
1189 | WARN_ON_ONCE(ptp->rx_ts_inline); |
1190 | ||
7c236c43 SH |
1191 | spin_lock_bh(&ptp->evt_lock); |
1192 | evts_waiting = !list_empty(&ptp->evt_list); | |
1193 | spin_unlock_bh(&ptp->evt_lock); | |
1194 | ||
1195 | if (!evts_waiting) | |
1196 | return PTP_PACKET_STATE_UNMATCHED; | |
1197 | ||
1198 | match = (struct efx_ptp_match *)skb->cb; | |
1199 | /* Look for a matching timestamp in the event queue */ | |
1200 | spin_lock_bh(&ptp->evt_lock); | |
1201 | list_for_each_safe(cursor, next, &ptp->evt_list) { | |
1202 | struct efx_ptp_event_rx *evt; | |
1203 | ||
1204 | evt = list_entry(cursor, struct efx_ptp_event_rx, link); | |
1205 | if ((evt->seq0 == match->words[0]) && | |
1206 | (evt->seq1 == match->words[1])) { | |
1207 | struct skb_shared_hwtstamps *timestamps; | |
1208 | ||
1209 | /* Match - add in hardware timestamp */ | |
1210 | timestamps = skb_hwtstamps(skb); | |
1211 | timestamps->hwtstamp = evt->hwtimestamp; | |
1212 | ||
1213 | match->state = PTP_PACKET_STATE_MATCHED; | |
1214 | rc = PTP_PACKET_STATE_MATCHED; | |
9545f4e2 | 1215 | list_move(&evt->link, &ptp->evt_free_list); |
7c236c43 SH |
1216 | break; |
1217 | } | |
1218 | } | |
1219 | spin_unlock_bh(&ptp->evt_lock); | |
1220 | ||
1221 | return rc; | |
1222 | } | |
1223 | ||
1224 | /* Process any queued receive events and corresponding packets | |
1225 | * | |
1226 | * q is returned with all the packets that are ready for delivery. | |
7c236c43 | 1227 | */ |
bbbe7149 | 1228 | static void efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q) |
7c236c43 SH |
1229 | { |
1230 | struct efx_ptp_data *ptp = efx->ptp_data; | |
7c236c43 SH |
1231 | struct sk_buff *skb; |
1232 | ||
1233 | while ((skb = skb_dequeue(&ptp->rxq))) { | |
1234 | struct efx_ptp_match *match; | |
1235 | ||
1236 | match = (struct efx_ptp_match *)skb->cb; | |
1237 | if (match->state == PTP_PACKET_STATE_MATCH_UNWANTED) { | |
1238 | __skb_queue_tail(q, skb); | |
1239 | } else if (efx_ptp_match_rx(efx, skb) == | |
1240 | PTP_PACKET_STATE_MATCHED) { | |
7c236c43 SH |
1241 | __skb_queue_tail(q, skb); |
1242 | } else if (time_after(jiffies, match->expiry)) { | |
1243 | match->state = PTP_PACKET_STATE_TIMED_OUT; | |
99691c4a | 1244 | ++ptp->rx_no_timestamp; |
7c236c43 SH |
1245 | __skb_queue_tail(q, skb); |
1246 | } else { | |
1247 | /* Replace unprocessed entry and stop */ | |
1248 | skb_queue_head(&ptp->rxq, skb); | |
1249 | break; | |
1250 | } | |
1251 | } | |
7c236c43 SH |
1252 | } |
1253 | ||
1254 | /* Complete processing of a received packet */ | |
1255 | static inline void efx_ptp_process_rx(struct efx_nic *efx, struct sk_buff *skb) | |
1256 | { | |
1257 | local_bh_disable(); | |
1258 | netif_receive_skb(skb); | |
1259 | local_bh_enable(); | |
1260 | } | |
1261 | ||
62a1c703 BH |
1262 | static void efx_ptp_remove_multicast_filters(struct efx_nic *efx) |
1263 | { | |
1264 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1265 | ||
1266 | if (ptp->rxfilter_installed) { | |
1267 | efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, | |
1268 | ptp->rxfilter_general); | |
1269 | efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, | |
1270 | ptp->rxfilter_event); | |
1271 | ptp->rxfilter_installed = false; | |
1272 | } | |
1273 | } | |
1274 | ||
1275 | static int efx_ptp_insert_multicast_filters(struct efx_nic *efx) | |
7c236c43 SH |
1276 | { |
1277 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1278 | struct efx_filter_spec rxfilter; | |
1279 | int rc; | |
1280 | ||
ac36baf8 | 1281 | if (!ptp->channel || ptp->rxfilter_installed) |
62a1c703 | 1282 | return 0; |
7c236c43 SH |
1283 | |
1284 | /* Must filter on both event and general ports to ensure | |
1285 | * that there is no packet re-ordering. | |
1286 | */ | |
1287 | efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0, | |
1288 | efx_rx_queue_index( | |
1289 | efx_channel_get_rx_queue(ptp->channel))); | |
1290 | rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP, | |
1291 | htonl(PTP_ADDRESS), | |
1292 | htons(PTP_EVENT_PORT)); | |
1293 | if (rc != 0) | |
1294 | return rc; | |
1295 | ||
1296 | rc = efx_filter_insert_filter(efx, &rxfilter, true); | |
1297 | if (rc < 0) | |
1298 | return rc; | |
1299 | ptp->rxfilter_event = rc; | |
1300 | ||
1301 | efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0, | |
1302 | efx_rx_queue_index( | |
1303 | efx_channel_get_rx_queue(ptp->channel))); | |
1304 | rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP, | |
1305 | htonl(PTP_ADDRESS), | |
1306 | htons(PTP_GENERAL_PORT)); | |
1307 | if (rc != 0) | |
1308 | goto fail; | |
1309 | ||
1310 | rc = efx_filter_insert_filter(efx, &rxfilter, true); | |
1311 | if (rc < 0) | |
1312 | goto fail; | |
1313 | ptp->rxfilter_general = rc; | |
1314 | ||
62a1c703 BH |
1315 | ptp->rxfilter_installed = true; |
1316 | return 0; | |
1317 | ||
1318 | fail: | |
1319 | efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, | |
1320 | ptp->rxfilter_event); | |
1321 | return rc; | |
1322 | } | |
1323 | ||
1324 | static int efx_ptp_start(struct efx_nic *efx) | |
1325 | { | |
1326 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1327 | int rc; | |
1328 | ||
1329 | ptp->reset_required = false; | |
1330 | ||
1331 | rc = efx_ptp_insert_multicast_filters(efx); | |
1332 | if (rc) | |
1333 | return rc; | |
1334 | ||
7c236c43 SH |
1335 | rc = efx_ptp_enable(efx); |
1336 | if (rc != 0) | |
62a1c703 | 1337 | goto fail; |
7c236c43 SH |
1338 | |
1339 | ptp->evt_frag_idx = 0; | |
1340 | ptp->current_adjfreq = 0; | |
7c236c43 SH |
1341 | |
1342 | return 0; | |
1343 | ||
7c236c43 | 1344 | fail: |
62a1c703 | 1345 | efx_ptp_remove_multicast_filters(efx); |
7c236c43 SH |
1346 | return rc; |
1347 | } | |
1348 | ||
1349 | static int efx_ptp_stop(struct efx_nic *efx) | |
1350 | { | |
1351 | struct efx_ptp_data *ptp = efx->ptp_data; | |
7c236c43 SH |
1352 | struct list_head *cursor; |
1353 | struct list_head *next; | |
2ea4dc28 AR |
1354 | int rc; |
1355 | ||
1356 | if (ptp == NULL) | |
1357 | return 0; | |
1358 | ||
1359 | rc = efx_ptp_disable(efx); | |
7c236c43 | 1360 | |
62a1c703 | 1361 | efx_ptp_remove_multicast_filters(efx); |
7c236c43 SH |
1362 | |
1363 | /* Make sure RX packets are really delivered */ | |
1364 | efx_ptp_deliver_rx_queue(&efx->ptp_data->rxq); | |
1365 | skb_queue_purge(&efx->ptp_data->txq); | |
1366 | ||
1367 | /* Drop any pending receive events */ | |
1368 | spin_lock_bh(&efx->ptp_data->evt_lock); | |
1369 | list_for_each_safe(cursor, next, &efx->ptp_data->evt_list) { | |
9545f4e2 | 1370 | list_move(cursor, &efx->ptp_data->evt_free_list); |
7c236c43 SH |
1371 | } |
1372 | spin_unlock_bh(&efx->ptp_data->evt_lock); | |
1373 | ||
1374 | return rc; | |
1375 | } | |
1376 | ||
2ea4dc28 AR |
1377 | static int efx_ptp_restart(struct efx_nic *efx) |
1378 | { | |
1379 | if (efx->ptp_data && efx->ptp_data->enabled) | |
1380 | return efx_ptp_start(efx); | |
1381 | return 0; | |
1382 | } | |
1383 | ||
7c236c43 SH |
1384 | static void efx_ptp_pps_worker(struct work_struct *work) |
1385 | { | |
1386 | struct efx_ptp_data *ptp = | |
1387 | container_of(work, struct efx_ptp_data, pps_work); | |
ac36baf8 | 1388 | struct efx_nic *efx = ptp->efx; |
7c236c43 SH |
1389 | struct ptp_clock_event ptp_evt; |
1390 | ||
1391 | if (efx_ptp_synchronize(efx, PTP_SYNC_ATTEMPTS)) | |
1392 | return; | |
1393 | ||
1394 | ptp_evt.type = PTP_CLOCK_PPSUSR; | |
1395 | ptp_evt.pps_times = ptp->host_time_pps; | |
1396 | ptp_clock_event(ptp->phc_clock, &ptp_evt); | |
1397 | } | |
1398 | ||
7c236c43 SH |
1399 | static void efx_ptp_worker(struct work_struct *work) |
1400 | { | |
1401 | struct efx_ptp_data *ptp_data = | |
1402 | container_of(work, struct efx_ptp_data, work); | |
ac36baf8 | 1403 | struct efx_nic *efx = ptp_data->efx; |
7c236c43 SH |
1404 | struct sk_buff *skb; |
1405 | struct sk_buff_head tempq; | |
1406 | ||
1407 | if (ptp_data->reset_required) { | |
1408 | efx_ptp_stop(efx); | |
1409 | efx_ptp_start(efx); | |
1410 | return; | |
1411 | } | |
1412 | ||
1413 | efx_ptp_drop_time_expired_events(efx); | |
1414 | ||
1415 | __skb_queue_head_init(&tempq); | |
bbbe7149 | 1416 | efx_ptp_process_events(efx, &tempq); |
7c236c43 | 1417 | |
bbbe7149 | 1418 | while ((skb = skb_dequeue(&ptp_data->txq))) |
23418dc1 | 1419 | ptp_data->xmit_skb(efx, skb); |
7c236c43 SH |
1420 | |
1421 | while ((skb = __skb_dequeue(&tempq))) | |
1422 | efx_ptp_process_rx(efx, skb); | |
1423 | } | |
1424 | ||
5d0dab01 BH |
1425 | static const struct ptp_clock_info efx_phc_clock_info = { |
1426 | .owner = THIS_MODULE, | |
1427 | .name = "sfc", | |
1428 | .max_adj = MAX_PPB, | |
1429 | .n_alarm = 0, | |
1430 | .n_ext_ts = 0, | |
1431 | .n_per_out = 0, | |
4986b4f0 | 1432 | .n_pins = 0, |
5d0dab01 BH |
1433 | .pps = 1, |
1434 | .adjfreq = efx_phc_adjfreq, | |
1435 | .adjtime = efx_phc_adjtime, | |
0fcb5c76 RC |
1436 | .gettime64 = efx_phc_gettime, |
1437 | .settime64 = efx_phc_settime, | |
5d0dab01 BH |
1438 | .enable = efx_phc_enable, |
1439 | }; | |
1440 | ||
ac36baf8 BH |
1441 | /* Initialise PTP state. */ |
1442 | int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel) | |
7c236c43 | 1443 | { |
7c236c43 SH |
1444 | struct efx_ptp_data *ptp; |
1445 | int rc = 0; | |
1446 | unsigned int pos; | |
1447 | ||
7c236c43 SH |
1448 | ptp = kzalloc(sizeof(struct efx_ptp_data), GFP_KERNEL); |
1449 | efx->ptp_data = ptp; | |
1450 | if (!efx->ptp_data) | |
1451 | return -ENOMEM; | |
1452 | ||
ac36baf8 BH |
1453 | ptp->efx = efx; |
1454 | ptp->channel = channel; | |
bd9a265d | 1455 | ptp->rx_ts_inline = efx_nic_rev(efx) >= EFX_REV_HUNT_A0; |
ac36baf8 | 1456 | |
0d19a540 | 1457 | rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int), GFP_KERNEL); |
7c236c43 SH |
1458 | if (rc != 0) |
1459 | goto fail1; | |
1460 | ||
7c236c43 SH |
1461 | skb_queue_head_init(&ptp->rxq); |
1462 | skb_queue_head_init(&ptp->txq); | |
1463 | ptp->workwq = create_singlethread_workqueue("sfc_ptp"); | |
1464 | if (!ptp->workwq) { | |
1465 | rc = -ENOMEM; | |
1466 | goto fail2; | |
1467 | } | |
1468 | ||
2935e3c3 | 1469 | if (efx_ptp_use_mac_tx_timestamps(efx)) { |
23418dc1 | 1470 | ptp->xmit_skb = efx_ptp_xmit_skb_queue; |
2935e3c3 EC |
1471 | /* Request sync events on this channel. */ |
1472 | channel->sync_events_state = SYNC_EVENTS_QUIESCENT; | |
1473 | } else { | |
1474 | ptp->xmit_skb = efx_ptp_xmit_skb_mc; | |
1475 | } | |
23418dc1 | 1476 | |
7c236c43 SH |
1477 | INIT_WORK(&ptp->work, efx_ptp_worker); |
1478 | ptp->config.flags = 0; | |
1479 | ptp->config.tx_type = HWTSTAMP_TX_OFF; | |
1480 | ptp->config.rx_filter = HWTSTAMP_FILTER_NONE; | |
1481 | INIT_LIST_HEAD(&ptp->evt_list); | |
1482 | INIT_LIST_HEAD(&ptp->evt_free_list); | |
1483 | spin_lock_init(&ptp->evt_lock); | |
1484 | for (pos = 0; pos < MAX_RECEIVE_EVENTS; pos++) | |
1485 | list_add(&ptp->rx_evts[pos].link, &ptp->evt_free_list); | |
1486 | ||
a6f73460 LE |
1487 | /* Get the NIC PTP attributes and set up time conversions */ |
1488 | rc = efx_ptp_get_attributes(efx); | |
1489 | if (rc < 0) | |
1490 | goto fail3; | |
1491 | ||
1492 | /* Get the timestamp corrections */ | |
1493 | rc = efx_ptp_get_timestamp_corrections(efx); | |
1494 | if (rc < 0) | |
1495 | goto fail3; | |
1496 | ||
9aecda95 BH |
1497 | if (efx->mcdi->fn_flags & |
1498 | (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY)) { | |
1499 | ptp->phc_clock_info = efx_phc_clock_info; | |
1500 | ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info, | |
1501 | &efx->pci_dev->dev); | |
1502 | if (IS_ERR(ptp->phc_clock)) { | |
1503 | rc = PTR_ERR(ptp->phc_clock); | |
1504 | goto fail3; | |
efee95f4 NP |
1505 | } else if (ptp->phc_clock) { |
1506 | INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker); | |
1507 | ptp->pps_workwq = create_singlethread_workqueue("sfc_pps"); | |
1508 | if (!ptp->pps_workwq) { | |
1509 | rc = -ENOMEM; | |
1510 | goto fail4; | |
1511 | } | |
9aecda95 | 1512 | } |
7c236c43 SH |
1513 | } |
1514 | ptp->nic_ts_enabled = false; | |
1515 | ||
1516 | return 0; | |
1517 | fail4: | |
1518 | ptp_clock_unregister(efx->ptp_data->phc_clock); | |
1519 | ||
1520 | fail3: | |
1521 | destroy_workqueue(efx->ptp_data->workwq); | |
1522 | ||
1523 | fail2: | |
1524 | efx_nic_free_buffer(efx, &ptp->start); | |
1525 | ||
1526 | fail1: | |
1527 | kfree(efx->ptp_data); | |
1528 | efx->ptp_data = NULL; | |
1529 | ||
1530 | return rc; | |
1531 | } | |
1532 | ||
ac36baf8 BH |
1533 | /* Initialise PTP channel. |
1534 | * | |
1535 | * Setting core_index to zero causes the queue to be initialised and doesn't | |
1536 | * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue. | |
1537 | */ | |
1538 | static int efx_ptp_probe_channel(struct efx_channel *channel) | |
7c236c43 SH |
1539 | { |
1540 | struct efx_nic *efx = channel->efx; | |
23418dc1 | 1541 | int rc; |
7c236c43 | 1542 | |
539de7c5 | 1543 | channel->irq_moderation_us = 0; |
ac36baf8 BH |
1544 | channel->rx_queue.core_index = 0; |
1545 | ||
23418dc1 MH |
1546 | rc = efx_ptp_probe(efx, channel); |
1547 | /* Failure to probe PTP is not fatal; this channel will just not be | |
1548 | * used for anything. | |
1549 | * In the case of EPERM, efx_ptp_probe will print its own message (in | |
1550 | * efx_ptp_get_attributes()), so we don't need to. | |
1551 | */ | |
1552 | if (rc && rc != -EPERM) | |
1553 | netif_warn(efx, drv, efx->net_dev, | |
1554 | "Failed to probe PTP, rc=%d\n", rc); | |
1555 | return 0; | |
ac36baf8 BH |
1556 | } |
1557 | ||
1558 | void efx_ptp_remove(struct efx_nic *efx) | |
1559 | { | |
7c236c43 SH |
1560 | if (!efx->ptp_data) |
1561 | return; | |
1562 | ||
ac36baf8 | 1563 | (void)efx_ptp_disable(efx); |
7c236c43 SH |
1564 | |
1565 | cancel_work_sync(&efx->ptp_data->work); | |
723eb536 MH |
1566 | if (efx->ptp_data->pps_workwq) |
1567 | cancel_work_sync(&efx->ptp_data->pps_work); | |
7c236c43 SH |
1568 | |
1569 | skb_queue_purge(&efx->ptp_data->rxq); | |
1570 | skb_queue_purge(&efx->ptp_data->txq); | |
1571 | ||
9aecda95 BH |
1572 | if (efx->ptp_data->phc_clock) { |
1573 | destroy_workqueue(efx->ptp_data->pps_workwq); | |
1574 | ptp_clock_unregister(efx->ptp_data->phc_clock); | |
1575 | } | |
7c236c43 SH |
1576 | |
1577 | destroy_workqueue(efx->ptp_data->workwq); | |
7c236c43 SH |
1578 | |
1579 | efx_nic_free_buffer(efx, &efx->ptp_data->start); | |
1580 | kfree(efx->ptp_data); | |
23418dc1 | 1581 | efx->ptp_data = NULL; |
7c236c43 SH |
1582 | } |
1583 | ||
ac36baf8 BH |
1584 | static void efx_ptp_remove_channel(struct efx_channel *channel) |
1585 | { | |
1586 | efx_ptp_remove(channel->efx); | |
1587 | } | |
1588 | ||
7c236c43 SH |
1589 | static void efx_ptp_get_channel_name(struct efx_channel *channel, |
1590 | char *buf, size_t len) | |
1591 | { | |
1592 | snprintf(buf, len, "%s-ptp", channel->efx->name); | |
1593 | } | |
1594 | ||
1595 | /* Determine whether this packet should be processed by the PTP module | |
1596 | * or transmitted conventionally. | |
1597 | */ | |
1598 | bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb) | |
1599 | { | |
1600 | return efx->ptp_data && | |
1601 | efx->ptp_data->enabled && | |
1602 | skb->len >= PTP_MIN_LENGTH && | |
1603 | skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM && | |
1604 | likely(skb->protocol == htons(ETH_P_IP)) && | |
e5a498e9 BH |
1605 | skb_transport_header_was_set(skb) && |
1606 | skb_network_header_len(skb) >= sizeof(struct iphdr) && | |
7c236c43 | 1607 | ip_hdr(skb)->protocol == IPPROTO_UDP && |
e5a498e9 BH |
1608 | skb_headlen(skb) >= |
1609 | skb_transport_offset(skb) + sizeof(struct udphdr) && | |
7c236c43 SH |
1610 | udp_hdr(skb)->dest == htons(PTP_EVENT_PORT); |
1611 | } | |
1612 | ||
1613 | /* Receive a PTP packet. Packets are queued until the arrival of | |
1614 | * the receive timestamp from the MC - this will probably occur after the | |
1615 | * packet arrival because of the processing in the MC. | |
1616 | */ | |
4a74dc65 | 1617 | static bool efx_ptp_rx(struct efx_channel *channel, struct sk_buff *skb) |
7c236c43 SH |
1618 | { |
1619 | struct efx_nic *efx = channel->efx; | |
1620 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1621 | struct efx_ptp_match *match = (struct efx_ptp_match *)skb->cb; | |
c939a316 | 1622 | u8 *match_data_012, *match_data_345; |
7c236c43 | 1623 | unsigned int version; |
ce320f44 | 1624 | u8 *data; |
7c236c43 SH |
1625 | |
1626 | match->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS); | |
1627 | ||
1628 | /* Correct version? */ | |
1629 | if (ptp->mode == MC_CMD_PTP_MODE_V1) { | |
97d48a10 | 1630 | if (!pskb_may_pull(skb, PTP_V1_MIN_LENGTH)) { |
4a74dc65 | 1631 | return false; |
7c236c43 | 1632 | } |
ce320f44 BH |
1633 | data = skb->data; |
1634 | version = ntohs(*(__be16 *)&data[PTP_V1_VERSION_OFFSET]); | |
7c236c43 | 1635 | if (version != PTP_VERSION_V1) { |
4a74dc65 | 1636 | return false; |
7c236c43 | 1637 | } |
c939a316 LE |
1638 | |
1639 | /* PTP V1 uses all six bytes of the UUID to match the packet | |
1640 | * to the timestamp | |
1641 | */ | |
ce320f44 BH |
1642 | match_data_012 = data + PTP_V1_UUID_OFFSET; |
1643 | match_data_345 = data + PTP_V1_UUID_OFFSET + 3; | |
7c236c43 | 1644 | } else { |
97d48a10 | 1645 | if (!pskb_may_pull(skb, PTP_V2_MIN_LENGTH)) { |
4a74dc65 | 1646 | return false; |
7c236c43 | 1647 | } |
ce320f44 BH |
1648 | data = skb->data; |
1649 | version = data[PTP_V2_VERSION_OFFSET]; | |
7c236c43 | 1650 | if ((version & PTP_VERSION_V2_MASK) != PTP_VERSION_V2) { |
4a74dc65 | 1651 | return false; |
7c236c43 | 1652 | } |
c939a316 LE |
1653 | |
1654 | /* The original V2 implementation uses bytes 2-7 of | |
1655 | * the UUID to match the packet to the timestamp. This | |
1656 | * discards two of the bytes of the MAC address used | |
1657 | * to create the UUID (SF bug 33070). The PTP V2 | |
1658 | * enhanced mode fixes this issue and uses bytes 0-2 | |
1659 | * and byte 5-7 of the UUID. | |
1660 | */ | |
ce320f44 | 1661 | match_data_345 = data + PTP_V2_UUID_OFFSET + 5; |
c939a316 | 1662 | if (ptp->mode == MC_CMD_PTP_MODE_V2) { |
ce320f44 | 1663 | match_data_012 = data + PTP_V2_UUID_OFFSET + 2; |
c939a316 | 1664 | } else { |
ce320f44 | 1665 | match_data_012 = data + PTP_V2_UUID_OFFSET + 0; |
c939a316 LE |
1666 | BUG_ON(ptp->mode != MC_CMD_PTP_MODE_V2_ENHANCED); |
1667 | } | |
7c236c43 SH |
1668 | } |
1669 | ||
1670 | /* Does this packet require timestamping? */ | |
ce320f44 | 1671 | if (ntohs(*(__be16 *)&data[PTP_DPORT_OFFSET]) == PTP_EVENT_PORT) { |
7c236c43 SH |
1672 | match->state = PTP_PACKET_STATE_UNMATCHED; |
1673 | ||
c939a316 LE |
1674 | /* We expect the sequence number to be in the same position in |
1675 | * the packet for PTP V1 and V2 | |
1676 | */ | |
1677 | BUILD_BUG_ON(PTP_V1_SEQUENCE_OFFSET != PTP_V2_SEQUENCE_OFFSET); | |
1678 | BUILD_BUG_ON(PTP_V1_SEQUENCE_LENGTH != PTP_V2_SEQUENCE_LENGTH); | |
1679 | ||
7c236c43 | 1680 | /* Extract UUID/Sequence information */ |
c939a316 LE |
1681 | match->words[0] = (match_data_012[0] | |
1682 | (match_data_012[1] << 8) | | |
1683 | (match_data_012[2] << 16) | | |
1684 | (match_data_345[0] << 24)); | |
1685 | match->words[1] = (match_data_345[1] | | |
1686 | (match_data_345[2] << 8) | | |
ce320f44 BH |
1687 | (data[PTP_V1_SEQUENCE_OFFSET + |
1688 | PTP_V1_SEQUENCE_LENGTH - 1] << | |
7c236c43 SH |
1689 | 16)); |
1690 | } else { | |
1691 | match->state = PTP_PACKET_STATE_MATCH_UNWANTED; | |
1692 | } | |
1693 | ||
1694 | skb_queue_tail(&ptp->rxq, skb); | |
1695 | queue_work(ptp->workwq, &ptp->work); | |
4a74dc65 BH |
1696 | |
1697 | return true; | |
7c236c43 SH |
1698 | } |
1699 | ||
1700 | /* Transmit a PTP packet. This has to be transmitted by the MC | |
1701 | * itself, through an MCDI call. MCDI calls aren't permitted | |
1702 | * in the transmit path so defer the actual transmission to a suitable worker. | |
1703 | */ | |
1704 | int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb) | |
1705 | { | |
1706 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1707 | ||
1708 | skb_queue_tail(&ptp->txq, skb); | |
1709 | ||
1710 | if ((udp_hdr(skb)->dest == htons(PTP_EVENT_PORT)) && | |
1711 | (skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM)) | |
1712 | efx_xmit_hwtstamp_pending(skb); | |
1713 | queue_work(ptp->workwq, &ptp->work); | |
1714 | ||
1715 | return NETDEV_TX_OK; | |
1716 | } | |
1717 | ||
9ec06595 DP |
1718 | int efx_ptp_get_mode(struct efx_nic *efx) |
1719 | { | |
1720 | return efx->ptp_data->mode; | |
1721 | } | |
1722 | ||
1723 | int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted, | |
1724 | unsigned int new_mode) | |
7c236c43 SH |
1725 | { |
1726 | if ((enable_wanted != efx->ptp_data->enabled) || | |
1727 | (enable_wanted && (efx->ptp_data->mode != new_mode))) { | |
2ea4dc28 | 1728 | int rc = 0; |
7c236c43 SH |
1729 | |
1730 | if (enable_wanted) { | |
1731 | /* Change of mode requires disable */ | |
1732 | if (efx->ptp_data->enabled && | |
1733 | (efx->ptp_data->mode != new_mode)) { | |
1734 | efx->ptp_data->enabled = false; | |
1735 | rc = efx_ptp_stop(efx); | |
1736 | if (rc != 0) | |
1737 | return rc; | |
1738 | } | |
1739 | ||
1740 | /* Set new operating mode and establish | |
1741 | * baseline synchronisation, which must | |
1742 | * succeed. | |
1743 | */ | |
1744 | efx->ptp_data->mode = new_mode; | |
2ea4dc28 AR |
1745 | if (netif_running(efx->net_dev)) |
1746 | rc = efx_ptp_start(efx); | |
7c236c43 SH |
1747 | if (rc == 0) { |
1748 | rc = efx_ptp_synchronize(efx, | |
1749 | PTP_SYNC_ATTEMPTS * 2); | |
1750 | if (rc != 0) | |
1751 | efx_ptp_stop(efx); | |
1752 | } | |
1753 | } else { | |
1754 | rc = efx_ptp_stop(efx); | |
1755 | } | |
1756 | ||
1757 | if (rc != 0) | |
1758 | return rc; | |
1759 | ||
1760 | efx->ptp_data->enabled = enable_wanted; | |
1761 | } | |
1762 | ||
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init) | |
1767 | { | |
7c236c43 SH |
1768 | int rc; |
1769 | ||
1770 | if (init->flags) | |
1771 | return -EINVAL; | |
1772 | ||
1773 | if ((init->tx_type != HWTSTAMP_TX_OFF) && | |
1774 | (init->tx_type != HWTSTAMP_TX_ON)) | |
1775 | return -ERANGE; | |
1776 | ||
9ec06595 DP |
1777 | rc = efx->type->ptp_set_ts_config(efx, init); |
1778 | if (rc) | |
7c236c43 SH |
1779 | return rc; |
1780 | ||
1781 | efx->ptp_data->config = *init; | |
7c236c43 SH |
1782 | return 0; |
1783 | } | |
1784 | ||
62ebac92 | 1785 | void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info) |
7c236c43 | 1786 | { |
7c236c43 | 1787 | struct efx_ptp_data *ptp = efx->ptp_data; |
9aecda95 BH |
1788 | struct efx_nic *primary = efx->primary; |
1789 | ||
1790 | ASSERT_RTNL(); | |
7c236c43 SH |
1791 | |
1792 | if (!ptp) | |
62ebac92 | 1793 | return; |
7c236c43 | 1794 | |
62ebac92 BH |
1795 | ts_info->so_timestamping |= (SOF_TIMESTAMPING_TX_HARDWARE | |
1796 | SOF_TIMESTAMPING_RX_HARDWARE | | |
1797 | SOF_TIMESTAMPING_RAW_HARDWARE); | |
6aa47c87 MH |
1798 | /* Check licensed features. If we don't have the license for TX |
1799 | * timestamps, the NIC will not support them. | |
1800 | */ | |
1801 | if (efx_ptp_use_mac_tx_timestamps(efx)) { | |
1802 | struct efx_ef10_nic_data *nic_data = efx->nic_data; | |
1803 | ||
1804 | if (!(nic_data->licensed_features & | |
1805 | (1 << LICENSED_V3_FEATURES_TX_TIMESTAMPS_LBN))) | |
1806 | ts_info->so_timestamping &= | |
1807 | ~SOF_TIMESTAMPING_TX_HARDWARE; | |
1808 | } | |
9aecda95 BH |
1809 | if (primary && primary->ptp_data && primary->ptp_data->phc_clock) |
1810 | ts_info->phc_index = | |
1811 | ptp_clock_index(primary->ptp_data->phc_clock); | |
7c236c43 | 1812 | ts_info->tx_types = 1 << HWTSTAMP_TX_OFF | 1 << HWTSTAMP_TX_ON; |
9ec06595 | 1813 | ts_info->rx_filters = ptp->efx->type->hwtstamp_filters; |
7c236c43 SH |
1814 | } |
1815 | ||
433dc9b3 | 1816 | int efx_ptp_set_ts_config(struct efx_nic *efx, struct ifreq *ifr) |
7c236c43 SH |
1817 | { |
1818 | struct hwtstamp_config config; | |
1819 | int rc; | |
1820 | ||
1821 | /* Not a PTP enabled port */ | |
1822 | if (!efx->ptp_data) | |
1823 | return -EOPNOTSUPP; | |
1824 | ||
1825 | if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) | |
1826 | return -EFAULT; | |
1827 | ||
1828 | rc = efx_ptp_ts_init(efx, &config); | |
1829 | if (rc != 0) | |
1830 | return rc; | |
1831 | ||
1832 | return copy_to_user(ifr->ifr_data, &config, sizeof(config)) | |
1833 | ? -EFAULT : 0; | |
1834 | } | |
1835 | ||
433dc9b3 BH |
1836 | int efx_ptp_get_ts_config(struct efx_nic *efx, struct ifreq *ifr) |
1837 | { | |
1838 | if (!efx->ptp_data) | |
1839 | return -EOPNOTSUPP; | |
1840 | ||
1841 | return copy_to_user(ifr->ifr_data, &efx->ptp_data->config, | |
1842 | sizeof(efx->ptp_data->config)) ? -EFAULT : 0; | |
1843 | } | |
1844 | ||
7c236c43 SH |
1845 | static void ptp_event_failure(struct efx_nic *efx, int expected_frag_len) |
1846 | { | |
1847 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1848 | ||
1849 | netif_err(efx, hw, efx->net_dev, | |
1850 | "PTP unexpected event length: got %d expected %d\n", | |
1851 | ptp->evt_frag_idx, expected_frag_len); | |
1852 | ptp->reset_required = true; | |
1853 | queue_work(ptp->workwq, &ptp->work); | |
1854 | } | |
1855 | ||
1856 | /* Process a completed receive event. Put it on the event queue and | |
1857 | * start worker thread. This is required because event and their | |
1858 | * correspoding packets may come in either order. | |
1859 | */ | |
1860 | static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp) | |
1861 | { | |
1862 | struct efx_ptp_event_rx *evt = NULL; | |
1863 | ||
bd9a265d JC |
1864 | if (WARN_ON_ONCE(ptp->rx_ts_inline)) |
1865 | return; | |
1866 | ||
7c236c43 SH |
1867 | if (ptp->evt_frag_idx != 3) { |
1868 | ptp_event_failure(efx, 3); | |
1869 | return; | |
1870 | } | |
1871 | ||
1872 | spin_lock_bh(&ptp->evt_lock); | |
1873 | if (!list_empty(&ptp->evt_free_list)) { | |
1874 | evt = list_first_entry(&ptp->evt_free_list, | |
1875 | struct efx_ptp_event_rx, link); | |
1876 | list_del(&evt->link); | |
1877 | ||
1878 | evt->seq0 = EFX_QWORD_FIELD(ptp->evt_frags[2], MCDI_EVENT_DATA); | |
1879 | evt->seq1 = (EFX_QWORD_FIELD(ptp->evt_frags[2], | |
1880 | MCDI_EVENT_SRC) | | |
1881 | (EFX_QWORD_FIELD(ptp->evt_frags[1], | |
1882 | MCDI_EVENT_SRC) << 8) | | |
1883 | (EFX_QWORD_FIELD(ptp->evt_frags[0], | |
1884 | MCDI_EVENT_SRC) << 16)); | |
a6f73460 | 1885 | evt->hwtimestamp = efx->ptp_data->nic_to_kernel_time( |
7c236c43 | 1886 | EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA), |
a6f73460 | 1887 | EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA), |
04796f4c | 1888 | ptp->ts_corrections.ptp_rx); |
7c236c43 SH |
1889 | evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS); |
1890 | list_add_tail(&evt->link, &ptp->evt_list); | |
1891 | ||
1892 | queue_work(ptp->workwq, &ptp->work); | |
f9fd7ec7 LE |
1893 | } else if (net_ratelimit()) { |
1894 | /* Log a rate-limited warning message. */ | |
f3211600 | 1895 | netif_err(efx, rx_err, efx->net_dev, "PTP event queue overflow\n"); |
7c236c43 SH |
1896 | } |
1897 | spin_unlock_bh(&ptp->evt_lock); | |
1898 | } | |
1899 | ||
1900 | static void ptp_event_fault(struct efx_nic *efx, struct efx_ptp_data *ptp) | |
1901 | { | |
1902 | int code = EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA); | |
1903 | if (ptp->evt_frag_idx != 1) { | |
1904 | ptp_event_failure(efx, 1); | |
1905 | return; | |
1906 | } | |
1907 | ||
1908 | netif_err(efx, hw, efx->net_dev, "PTP error %d\n", code); | |
1909 | } | |
1910 | ||
1911 | static void ptp_event_pps(struct efx_nic *efx, struct efx_ptp_data *ptp) | |
1912 | { | |
1913 | if (ptp->nic_ts_enabled) | |
1914 | queue_work(ptp->pps_workwq, &ptp->pps_work); | |
1915 | } | |
1916 | ||
1917 | void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev) | |
1918 | { | |
1919 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1920 | int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE); | |
1921 | ||
8f355e5c | 1922 | if (!ptp) { |
acaef3c1 | 1923 | if (!efx->ptp_warned) { |
8f355e5c EC |
1924 | netif_warn(efx, drv, efx->net_dev, |
1925 | "Received PTP event but PTP not set up\n"); | |
acaef3c1 EC |
1926 | efx->ptp_warned = true; |
1927 | } | |
8f355e5c EC |
1928 | return; |
1929 | } | |
1930 | ||
7c236c43 SH |
1931 | if (!ptp->enabled) |
1932 | return; | |
1933 | ||
1934 | if (ptp->evt_frag_idx == 0) { | |
1935 | ptp->evt_code = code; | |
1936 | } else if (ptp->evt_code != code) { | |
1937 | netif_err(efx, hw, efx->net_dev, | |
1938 | "PTP out of sequence event %d\n", code); | |
1939 | ptp->evt_frag_idx = 0; | |
1940 | } | |
1941 | ||
1942 | ptp->evt_frags[ptp->evt_frag_idx++] = *ev; | |
1943 | if (!MCDI_EVENT_FIELD(*ev, CONT)) { | |
1944 | /* Process resulting event */ | |
1945 | switch (code) { | |
1946 | case MCDI_EVENT_CODE_PTP_RX: | |
1947 | ptp_event_rx(efx, ptp); | |
1948 | break; | |
1949 | case MCDI_EVENT_CODE_PTP_FAULT: | |
1950 | ptp_event_fault(efx, ptp); | |
1951 | break; | |
1952 | case MCDI_EVENT_CODE_PTP_PPS: | |
1953 | ptp_event_pps(efx, ptp); | |
1954 | break; | |
1955 | default: | |
1956 | netif_err(efx, hw, efx->net_dev, | |
1957 | "PTP unknown event %d\n", code); | |
1958 | break; | |
1959 | } | |
1960 | ptp->evt_frag_idx = 0; | |
1961 | } else if (MAX_EVENT_FRAGS == ptp->evt_frag_idx) { | |
1962 | netif_err(efx, hw, efx->net_dev, | |
1963 | "PTP too many event fragments\n"); | |
1964 | ptp->evt_frag_idx = 0; | |
1965 | } | |
1966 | } | |
1967 | ||
bd9a265d JC |
1968 | void efx_time_sync_event(struct efx_channel *channel, efx_qword_t *ev) |
1969 | { | |
1280c0f8 EC |
1970 | struct efx_nic *efx = channel->efx; |
1971 | struct efx_ptp_data *ptp = efx->ptp_data; | |
1972 | ||
1973 | /* When extracting the sync timestamp minor value, we should discard | |
1974 | * the least significant two bits. These are not required in order | |
1975 | * to reconstruct full-range timestamps and they are optionally used | |
1976 | * to report status depending on the options supplied when subscribing | |
1977 | * for sync events. | |
1978 | */ | |
bd9a265d JC |
1979 | channel->sync_timestamp_major = MCDI_EVENT_FIELD(*ev, PTP_TIME_MAJOR); |
1980 | channel->sync_timestamp_minor = | |
1280c0f8 EC |
1981 | (MCDI_EVENT_FIELD(*ev, PTP_TIME_MINOR_MS_8BITS) & 0xFC) |
1982 | << ptp->nic_time.sync_event_minor_shift; | |
1983 | ||
bd9a265d JC |
1984 | /* if sync events have been disabled then we want to silently ignore |
1985 | * this event, so throw away result. | |
1986 | */ | |
1987 | (void) cmpxchg(&channel->sync_events_state, SYNC_EVENTS_REQUESTED, | |
1988 | SYNC_EVENTS_VALID); | |
1989 | } | |
1990 | ||
bd9a265d JC |
1991 | static inline u32 efx_rx_buf_timestamp_minor(struct efx_nic *efx, const u8 *eh) |
1992 | { | |
1993 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) | |
1994 | return __le32_to_cpup((const __le32 *)(eh + efx->rx_packet_ts_offset)); | |
1995 | #else | |
1996 | const u8 *data = eh + efx->rx_packet_ts_offset; | |
1997 | return (u32)data[0] | | |
1998 | (u32)data[1] << 8 | | |
1999 | (u32)data[2] << 16 | | |
2000 | (u32)data[3] << 24; | |
2001 | #endif | |
2002 | } | |
2003 | ||
2004 | void __efx_rx_skb_attach_timestamp(struct efx_channel *channel, | |
2005 | struct sk_buff *skb) | |
2006 | { | |
2007 | struct efx_nic *efx = channel->efx; | |
1280c0f8 | 2008 | struct efx_ptp_data *ptp = efx->ptp_data; |
bd9a265d JC |
2009 | u32 pkt_timestamp_major, pkt_timestamp_minor; |
2010 | u32 diff, carry; | |
2011 | struct skb_shared_hwtstamps *timestamps; | |
2012 | ||
1280c0f8 EC |
2013 | if (channel->sync_events_state != SYNC_EVENTS_VALID) |
2014 | return; | |
2015 | ||
c4f64fcc | 2016 | pkt_timestamp_minor = efx_rx_buf_timestamp_minor(efx, skb_mac_header(skb)); |
bd9a265d JC |
2017 | |
2018 | /* get the difference between the packet and sync timestamps, | |
2019 | * modulo one second | |
2020 | */ | |
1280c0f8 EC |
2021 | diff = pkt_timestamp_minor - channel->sync_timestamp_minor; |
2022 | if (pkt_timestamp_minor < channel->sync_timestamp_minor) | |
2023 | diff += ptp->nic_time.minor_max; | |
2024 | ||
bd9a265d | 2025 | /* do we roll over a second boundary and need to carry the one? */ |
1280c0f8 | 2026 | carry = (channel->sync_timestamp_minor >= ptp->nic_time.minor_max - diff) ? |
bd9a265d JC |
2027 | 1 : 0; |
2028 | ||
1280c0f8 | 2029 | if (diff <= ptp->nic_time.sync_event_diff_max) { |
bd9a265d JC |
2030 | /* packet is ahead of the sync event by a quarter of a second or |
2031 | * less (allowing for fuzz) | |
2032 | */ | |
2033 | pkt_timestamp_major = channel->sync_timestamp_major + carry; | |
1280c0f8 | 2034 | } else if (diff >= ptp->nic_time.sync_event_diff_min) { |
bd9a265d JC |
2035 | /* packet is behind the sync event but within the fuzz factor. |
2036 | * This means the RX packet and sync event crossed as they were | |
2037 | * placed on the event queue, which can sometimes happen. | |
2038 | */ | |
2039 | pkt_timestamp_major = channel->sync_timestamp_major - 1 + carry; | |
2040 | } else { | |
2041 | /* it's outside tolerance in both directions. this might be | |
2042 | * indicative of us missing sync events for some reason, so | |
2043 | * we'll call it an error rather than risk giving a bogus | |
2044 | * timestamp. | |
2045 | */ | |
2046 | netif_vdbg(efx, drv, efx->net_dev, | |
2047 | "packet timestamp %x too far from sync event %x:%x\n", | |
2048 | pkt_timestamp_minor, channel->sync_timestamp_major, | |
2049 | channel->sync_timestamp_minor); | |
2050 | return; | |
2051 | } | |
2052 | ||
2053 | /* attach the timestamps to the skb */ | |
2054 | timestamps = skb_hwtstamps(skb); | |
1280c0f8 EC |
2055 | timestamps->hwtstamp = |
2056 | ptp->nic_to_kernel_time(pkt_timestamp_major, | |
2057 | pkt_timestamp_minor, | |
2058 | ptp->ts_corrections.general_rx); | |
bd9a265d JC |
2059 | } |
2060 | ||
7c236c43 SH |
2061 | static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta) |
2062 | { | |
2063 | struct efx_ptp_data *ptp_data = container_of(ptp, | |
2064 | struct efx_ptp_data, | |
2065 | phc_clock_info); | |
ac36baf8 | 2066 | struct efx_nic *efx = ptp_data->efx; |
59cfc479 | 2067 | MCDI_DECLARE_BUF(inadj, MC_CMD_PTP_IN_ADJUST_LEN); |
7c236c43 SH |
2068 | s64 adjustment_ns; |
2069 | int rc; | |
2070 | ||
2071 | if (delta > MAX_PPB) | |
2072 | delta = MAX_PPB; | |
2073 | else if (delta < -MAX_PPB) | |
2074 | delta = -MAX_PPB; | |
2075 | ||
88a4fb5f LE |
2076 | /* Convert ppb to fixed point ns taking care to round correctly. */ |
2077 | adjustment_ns = ((s64)delta * PPB_SCALE_WORD + | |
2078 | (1 << (ptp_data->adjfreq_ppb_shift - 1))) >> | |
2079 | ptp_data->adjfreq_ppb_shift; | |
7c236c43 SH |
2080 | |
2081 | MCDI_SET_DWORD(inadj, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST); | |
c1d828bd | 2082 | MCDI_SET_DWORD(inadj, PTP_IN_PERIPH_ID, 0); |
338f74df | 2083 | MCDI_SET_QWORD(inadj, PTP_IN_ADJUST_FREQ, adjustment_ns); |
7c236c43 SH |
2084 | MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_SECONDS, 0); |
2085 | MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_NANOSECONDS, 0); | |
2086 | rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inadj, sizeof(inadj), | |
2087 | NULL, 0, NULL); | |
2088 | if (rc != 0) | |
2089 | return rc; | |
2090 | ||
cd6fe65e | 2091 | ptp_data->current_adjfreq = adjustment_ns; |
7c236c43 SH |
2092 | return 0; |
2093 | } | |
2094 | ||
2095 | static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta) | |
2096 | { | |
a6f73460 | 2097 | u32 nic_major, nic_minor; |
7c236c43 SH |
2098 | struct efx_ptp_data *ptp_data = container_of(ptp, |
2099 | struct efx_ptp_data, | |
2100 | phc_clock_info); | |
ac36baf8 | 2101 | struct efx_nic *efx = ptp_data->efx; |
59cfc479 | 2102 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_ADJUST_LEN); |
7c236c43 | 2103 | |
a6f73460 LE |
2104 | efx->ptp_data->ns_to_nic_time(delta, &nic_major, &nic_minor); |
2105 | ||
7c236c43 | 2106 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST); |
c1d828bd | 2107 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); |
cd6fe65e | 2108 | MCDI_SET_QWORD(inbuf, PTP_IN_ADJUST_FREQ, ptp_data->current_adjfreq); |
a6f73460 LE |
2109 | MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_MAJOR, nic_major); |
2110 | MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_MINOR, nic_minor); | |
7c236c43 SH |
2111 | return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), |
2112 | NULL, 0, NULL); | |
2113 | } | |
2114 | ||
0fcb5c76 | 2115 | static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) |
7c236c43 SH |
2116 | { |
2117 | struct efx_ptp_data *ptp_data = container_of(ptp, | |
2118 | struct efx_ptp_data, | |
2119 | phc_clock_info); | |
ac36baf8 | 2120 | struct efx_nic *efx = ptp_data->efx; |
59cfc479 BH |
2121 | MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_READ_NIC_TIME_LEN); |
2122 | MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_READ_NIC_TIME_LEN); | |
7c236c43 | 2123 | int rc; |
a6f73460 | 2124 | ktime_t kt; |
7c236c43 SH |
2125 | |
2126 | MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_READ_NIC_TIME); | |
c1d828bd | 2127 | MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0); |
7c236c43 SH |
2128 | |
2129 | rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf), | |
2130 | outbuf, sizeof(outbuf), NULL); | |
2131 | if (rc != 0) | |
2132 | return rc; | |
2133 | ||
a6f73460 LE |
2134 | kt = ptp_data->nic_to_kernel_time( |
2135 | MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_MAJOR), | |
2136 | MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_MINOR), 0); | |
0fcb5c76 | 2137 | *ts = ktime_to_timespec64(kt); |
7c236c43 SH |
2138 | return 0; |
2139 | } | |
2140 | ||
2141 | static int efx_phc_settime(struct ptp_clock_info *ptp, | |
0fcb5c76 | 2142 | const struct timespec64 *e_ts) |
7c236c43 SH |
2143 | { |
2144 | /* Get the current NIC time, efx_phc_gettime. | |
2145 | * Subtract from the desired time to get the offset | |
2146 | * call efx_phc_adjtime with the offset | |
2147 | */ | |
2148 | int rc; | |
0fcb5c76 RC |
2149 | struct timespec64 time_now; |
2150 | struct timespec64 delta; | |
7c236c43 SH |
2151 | |
2152 | rc = efx_phc_gettime(ptp, &time_now); | |
2153 | if (rc != 0) | |
2154 | return rc; | |
2155 | ||
0fcb5c76 | 2156 | delta = timespec64_sub(*e_ts, time_now); |
7c236c43 | 2157 | |
0fcb5c76 | 2158 | rc = efx_phc_adjtime(ptp, timespec64_to_ns(&delta)); |
7c236c43 SH |
2159 | if (rc != 0) |
2160 | return rc; | |
2161 | ||
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | static int efx_phc_enable(struct ptp_clock_info *ptp, | |
2166 | struct ptp_clock_request *request, | |
2167 | int enable) | |
2168 | { | |
2169 | struct efx_ptp_data *ptp_data = container_of(ptp, | |
2170 | struct efx_ptp_data, | |
2171 | phc_clock_info); | |
2172 | if (request->type != PTP_CLK_REQ_PPS) | |
2173 | return -EOPNOTSUPP; | |
2174 | ||
2175 | ptp_data->nic_ts_enabled = !!enable; | |
2176 | return 0; | |
2177 | } | |
2178 | ||
e7345ba3 | 2179 | static const struct efx_channel_type efx_ptp_channel_type = { |
7c236c43 SH |
2180 | .handle_no_channel = efx_ptp_handle_no_channel, |
2181 | .pre_probe = efx_ptp_probe_channel, | |
2182 | .post_remove = efx_ptp_remove_channel, | |
2183 | .get_name = efx_ptp_get_channel_name, | |
2184 | /* no copy operation; there is no need to reallocate this channel */ | |
2185 | .receive_skb = efx_ptp_rx, | |
2935e3c3 | 2186 | .want_txqs = efx_ptp_want_txqs, |
7c236c43 SH |
2187 | .keep_eventq = false, |
2188 | }; | |
2189 | ||
ac36baf8 | 2190 | void efx_ptp_defer_probe_with_channel(struct efx_nic *efx) |
7c236c43 SH |
2191 | { |
2192 | /* Check whether PTP is implemented on this NIC. The DISABLE | |
2193 | * operation will succeed if and only if it is implemented. | |
2194 | */ | |
2195 | if (efx_ptp_disable(efx) == 0) | |
2196 | efx->extra_channel_type[EFX_EXTRA_CHANNEL_PTP] = | |
2197 | &efx_ptp_channel_type; | |
2198 | } | |
2ea4dc28 AR |
2199 | |
2200 | void efx_ptp_start_datapath(struct efx_nic *efx) | |
2201 | { | |
2202 | if (efx_ptp_restart(efx)) | |
2203 | netif_err(efx, drv, efx->net_dev, "Failed to restart PTP.\n"); | |
bd9a265d JC |
2204 | /* re-enable timestamping if it was previously enabled */ |
2205 | if (efx->type->ptp_set_ts_sync_events) | |
2206 | efx->type->ptp_set_ts_sync_events(efx, true, true); | |
2ea4dc28 AR |
2207 | } |
2208 | ||
2209 | void efx_ptp_stop_datapath(struct efx_nic *efx) | |
2210 | { | |
bd9a265d JC |
2211 | /* temporarily disable timestamping */ |
2212 | if (efx->type->ptp_set_ts_sync_events) | |
2213 | efx->type->ptp_set_ts_sync_events(efx, false, true); | |
2ea4dc28 AR |
2214 | efx_ptp_stop(efx); |
2215 | } |