aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorStuart Hodgson <smhodgson@solarflare.com>2012-09-03 06:09:36 -0400
committerBen Hutchings <bhutchings@solarflare.com>2012-09-18 21:54:12 -0400
commit7c236c43b838221e17220bcb39e8e8d8c7123713 (patch)
tree4ef6fa19edafeddf8280c5086624ae430125be91
parent576eda8b08e00cbb0cf29ba777c2cb461c98cbbc (diff)
sfc: Add support for IEEE-1588 PTP
Add PTP IEEE-1588 support and make accesible via the PHC subsystem. This work is based on prior code by Andrew Jackson Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> [bwh: - Add byte order conversion in efx_ptp_send_times() - Simplify conversion of PPS event times - Add the built-in vs module check to CONFIG_SFC_PTP dependencies] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat
-rw-r--r--drivers/net/ethernet/sfc/Kconfig7
-rw-r--r--drivers/net/ethernet/sfc/Makefile1
-rw-r--r--drivers/net/ethernet/sfc/efx.c3
-rw-r--r--drivers/net/ethernet/sfc/ethtool.c1
-rw-r--r--drivers/net/ethernet/sfc/mcdi.c5
-rw-r--r--drivers/net/ethernet/sfc/mcdi_pcol.h1
-rw-r--r--drivers/net/ethernet/sfc/net_driver.h19
-rw-r--r--drivers/net/ethernet/sfc/nic.h36
-rw-r--r--drivers/net/ethernet/sfc/ptp.c1483
-rw-r--r--drivers/net/ethernet/sfc/siena.c1
-rw-r--r--drivers/net/ethernet/sfc/tx.c6
11 files changed, 1562 insertions, 1 deletions
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
index fb3cbc27063c..25906c1d1b15 100644
--- a/drivers/net/ethernet/sfc/Kconfig
+++ b/drivers/net/ethernet/sfc/Kconfig
@@ -34,3 +34,10 @@ config SFC_SRIOV
34 This enables support for the SFC9000 I/O Virtualization 34 This enables support for the SFC9000 I/O Virtualization
35 features, allowing accelerated network performance in 35 features, allowing accelerated network performance in
36 virtualized environments. 36 virtualized environments.
37config SFC_PTP
38 bool "Solarflare SFC9000-family PTP support"
39 depends on SFC && PTP_1588_CLOCK && !(SFC=y && PTP_1588_CLOCK=m)
40 default y
41 ---help---
42 This enables support for the Precision Time Protocol (PTP)
43 on SFC9000-family NICs
diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile
index ea1f8db57318..e11f2ecf69d9 100644
--- a/drivers/net/ethernet/sfc/Makefile
+++ b/drivers/net/ethernet/sfc/Makefile
@@ -5,5 +5,6 @@ sfc-y += efx.o nic.o falcon.o siena.o tx.o rx.o filter.o \
5 mcdi.o mcdi_phy.o mcdi_mon.o 5 mcdi.o mcdi_phy.o mcdi_mon.o
6sfc-$(CONFIG_SFC_MTD) += mtd.o 6sfc-$(CONFIG_SFC_MTD) += mtd.o
7sfc-$(CONFIG_SFC_SRIOV) += siena_sriov.o 7sfc-$(CONFIG_SFC_SRIOV) += siena_sriov.o
8sfc-$(CONFIG_SFC_PTP) += ptp.o
8 9
9obj-$(CONFIG_SFC) += sfc.o 10obj-$(CONFIG_SFC) += sfc.o
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 8b79a6413fe4..96bd980e828d 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1779,6 +1779,9 @@ static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1779 struct efx_nic *efx = netdev_priv(net_dev); 1779 struct efx_nic *efx = netdev_priv(net_dev);
1780 struct mii_ioctl_data *data = if_mii(ifr); 1780 struct mii_ioctl_data *data = if_mii(ifr);
1781 1781
1782 if (cmd == SIOCSHWTSTAMP)
1783 return efx_ptp_ioctl(efx, ifr, cmd);
1784
1782 /* Convert phy_id from older PRTAD/DEVAD format */ 1785 /* Convert phy_id from older PRTAD/DEVAD format */
1783 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 1786 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1784 (data->phy_id & 0xfc00) == 0x0400) 1787 (data->phy_id & 0xfc00) == 0x0400)
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index f8e7e204981f..9df556c01b8e 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1174,6 +1174,7 @@ const struct ethtool_ops efx_ethtool_ops = {
1174 .get_rxfh_indir_size = efx_ethtool_get_rxfh_indir_size, 1174 .get_rxfh_indir_size = efx_ethtool_get_rxfh_indir_size,
1175 .get_rxfh_indir = efx_ethtool_get_rxfh_indir, 1175 .get_rxfh_indir = efx_ethtool_get_rxfh_indir,
1176 .set_rxfh_indir = efx_ethtool_set_rxfh_indir, 1176 .set_rxfh_indir = efx_ethtool_set_rxfh_indir,
1177 .get_ts_info = efx_ptp_get_ts_info,
1177 .get_module_info = efx_ethtool_get_module_info, 1178 .get_module_info = efx_ethtool_get_module_info,
1178 .get_module_eeprom = efx_ethtool_get_module_eeprom, 1179 .get_module_eeprom = efx_ethtool_get_module_eeprom,
1179}; 1180};
diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
index 2707e86def9e..294df4bca4a6 100644
--- a/drivers/net/ethernet/sfc/mcdi.c
+++ b/drivers/net/ethernet/sfc/mcdi.c
@@ -578,6 +578,11 @@ void efx_mcdi_process_event(struct efx_channel *channel,
578 case MCDI_EVENT_CODE_FLR: 578 case MCDI_EVENT_CODE_FLR:
579 efx_sriov_flr(efx, MCDI_EVENT_FIELD(*event, FLR_VF)); 579 efx_sriov_flr(efx, MCDI_EVENT_FIELD(*event, FLR_VF));
580 break; 580 break;
581 case MCDI_EVENT_CODE_PTP_RX:
582 case MCDI_EVENT_CODE_PTP_FAULT:
583 case MCDI_EVENT_CODE_PTP_PPS:
584 efx_ptp_event(efx, event);
585 break;
581 586
582 default: 587 default:
583 netif_err(efx, hw, efx->net_dev, "Unknown MCDI event 0x%x\n", 588 netif_err(efx, hw, efx->net_dev, "Unknown MCDI event 0x%x\n",
diff --git a/drivers/net/ethernet/sfc/mcdi_pcol.h b/drivers/net/ethernet/sfc/mcdi_pcol.h
index 50389326bec8..9d426d0457bd 100644
--- a/drivers/net/ethernet/sfc/mcdi_pcol.h
+++ b/drivers/net/ethernet/sfc/mcdi_pcol.h
@@ -289,6 +289,7 @@
289#define MCDI_EVENT_CODE_TX_FLUSH 0xc /* enum */ 289#define MCDI_EVENT_CODE_TX_FLUSH 0xc /* enum */
290#define MCDI_EVENT_CODE_PTP_RX 0xd /* enum */ 290#define MCDI_EVENT_CODE_PTP_RX 0xd /* enum */
291#define MCDI_EVENT_CODE_PTP_FAULT 0xe /* enum */ 291#define MCDI_EVENT_CODE_PTP_FAULT 0xe /* enum */
292#define MCDI_EVENT_CODE_PTP_PPS 0xf /* enum */
292#define MCDI_EVENT_CMDDONE_DATA_OFST 0 293#define MCDI_EVENT_CMDDONE_DATA_OFST 0
293#define MCDI_EVENT_CMDDONE_DATA_LBN 0 294#define MCDI_EVENT_CMDDONE_DATA_LBN 0
294#define MCDI_EVENT_CMDDONE_DATA_WIDTH 32 295#define MCDI_EVENT_CMDDONE_DATA_WIDTH 32
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 0f0926e68963..797dbed25d94 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -56,7 +56,8 @@
56#define EFX_MAX_CHANNELS 32U 56#define EFX_MAX_CHANNELS 32U
57#define EFX_MAX_RX_QUEUES EFX_MAX_CHANNELS 57#define EFX_MAX_RX_QUEUES EFX_MAX_CHANNELS
58#define EFX_EXTRA_CHANNEL_IOV 0 58#define EFX_EXTRA_CHANNEL_IOV 0
59#define EFX_MAX_EXTRA_CHANNELS 1U 59#define EFX_EXTRA_CHANNEL_PTP 1
60#define EFX_MAX_EXTRA_CHANNELS 2U
60 61
61/* Checksum generation is a per-queue option in hardware, so each 62/* Checksum generation is a per-queue option in hardware, so each
62 * queue visible to the networking core is backed by two hardware TX 63 * queue visible to the networking core is backed by two hardware TX
@@ -68,6 +69,9 @@
68#define EFX_TXQ_TYPES 4 69#define EFX_TXQ_TYPES 4
69#define EFX_MAX_TX_QUEUES (EFX_TXQ_TYPES * EFX_MAX_CHANNELS) 70#define EFX_MAX_TX_QUEUES (EFX_TXQ_TYPES * EFX_MAX_CHANNELS)
70 71
72/* Forward declare Precision Time Protocol (PTP) support structure. */
73struct efx_ptp_data;
74
71struct efx_self_tests; 75struct efx_self_tests;
72 76
73/** 77/**
@@ -736,6 +740,7 @@ struct vfdi_status;
736 * %local_addr_list. Protected by %local_lock. 740 * %local_addr_list. Protected by %local_lock.
737 * @local_lock: Mutex protecting %local_addr_list and %local_page_list. 741 * @local_lock: Mutex protecting %local_addr_list and %local_page_list.
738 * @peer_work: Work item to broadcast peer addresses to VMs. 742 * @peer_work: Work item to broadcast peer addresses to VMs.
743 * @ptp_data: PTP state data
739 * @monitor_work: Hardware monitor workitem 744 * @monitor_work: Hardware monitor workitem
740 * @biu_lock: BIU (bus interface unit) lock 745 * @biu_lock: BIU (bus interface unit) lock
741 * @last_irq_cpu: Last CPU to handle a possible test interrupt. This 746 * @last_irq_cpu: Last CPU to handle a possible test interrupt. This
@@ -863,6 +868,10 @@ struct efx_nic {
863 struct work_struct peer_work; 868 struct work_struct peer_work;
864#endif 869#endif
865 870
871#ifdef CONFIG_SFC_PTP
872 struct efx_ptp_data *ptp_data;
873#endif
874
866 /* The following fields may be written more often */ 875 /* The following fields may be written more often */
867 876
868 struct delayed_work monitor_work ____cacheline_aligned_in_smp; 877 struct delayed_work monitor_work ____cacheline_aligned_in_smp;
@@ -1125,5 +1134,13 @@ static inline void clear_bit_le(unsigned nr, unsigned char *addr)
1125#define EFX_MAX_FRAME_LEN(mtu) \ 1134#define EFX_MAX_FRAME_LEN(mtu) \
1126 ((((mtu) + ETH_HLEN + VLAN_HLEN + 4/* FCS */ + 7) & ~7) + 16) 1135 ((((mtu) + ETH_HLEN + VLAN_HLEN + 4/* FCS */ + 7) & ~7) + 16)
1127 1136
1137static inline bool efx_xmit_with_hwtstamp(struct sk_buff *skb)
1138{
1139 return skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP;
1140}
1141static inline void efx_xmit_hwtstamp_pending(struct sk_buff *skb)
1142{
1143 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1144}
1128 1145
1129#endif /* EFX_NET_DRIVER_H */ 1146#endif /* EFX_NET_DRIVER_H */
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index bab5cd9f5740..438cef11f727 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -11,6 +11,7 @@
11#ifndef EFX_NIC_H 11#ifndef EFX_NIC_H
12#define EFX_NIC_H 12#define EFX_NIC_H
13 13
14#include <linux/net_tstamp.h>
14#include <linux/i2c-algo-bit.h> 15#include <linux/i2c-algo-bit.h>
15#include "net_driver.h" 16#include "net_driver.h"
16#include "efx.h" 17#include "efx.h"
@@ -250,6 +251,41 @@ extern int efx_sriov_get_vf_config(struct net_device *dev, int vf,
250extern int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf, 251extern int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf,
251 bool spoofchk); 252 bool spoofchk);
252 253
254struct ethtool_ts_info;
255#ifdef CONFIG_SFC_PTP
256extern void efx_ptp_probe(struct efx_nic *efx);
257extern int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd);
258extern int efx_ptp_get_ts_info(struct net_device *net_dev,
259 struct ethtool_ts_info *ts_info);
260extern bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
261extern int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
262extern void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);
263#else
264static inline void efx_ptp_probe(struct efx_nic *efx) {}
265static inline int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd)
266{
267 return -EOPNOTSUPP;
268}
269static inline int efx_ptp_get_ts_info(struct net_device *net_dev,
270 struct ethtool_ts_info *ts_info)
271{
272 ts_info->so_timestamping = (SOF_TIMESTAMPING_SOFTWARE |
273 SOF_TIMESTAMPING_RX_SOFTWARE);
274 ts_info->phc_index = -1;
275
276 return 0;
277}
278static inline bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
279{
280 return false;
281}
282static inline int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
283{
284 return NETDEV_TX_OK;
285}
286static inline void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev) {}
287#endif
288
253extern const struct efx_nic_type falcon_a1_nic_type; 289extern const struct efx_nic_type falcon_a1_nic_type;
254extern const struct efx_nic_type falcon_b0_nic_type; 290extern const struct efx_nic_type falcon_b0_nic_type;
255extern const struct efx_nic_type siena_a0_nic_type; 291extern const struct efx_nic_type siena_a0_nic_type;
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
new file mode 100644
index 000000000000..2b07a4eae07e
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -0,0 +1,1483 @@
1/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2011 Solarflare Communications Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
8 */
9
10/* Theory of operation:
11 *
12 * PTP support is assisted by firmware running on the MC, which provides
13 * the hardware timestamping capabilities. Both transmitted and received
14 * PTP event packets are queued onto internal queues for subsequent processing;
15 * this is because the MC operations are relatively long and would block
16 * block NAPI/interrupt operation.
17 *
18 * Receive event processing:
19 * The event contains the packet's UUID and sequence number, together
20 * with the hardware timestamp. The PTP receive packet queue is searched
21 * for this UUID/sequence number and, if found, put on a pending queue.
22 * Packets not matching are delivered without timestamps (MCDI events will
23 * always arrive after the actual packet).
24 * It is important for the operation of the PTP protocol that the ordering
25 * of packets between the event and general port is maintained.
26 *
27 * Work queue processing:
28 * If work waiting, synchronise host/hardware time
29 *
30 * Transmit: send packet through MC, which returns the transmission time
31 * that is converted to an appropriate timestamp.
32 *
33 * Receive: the packet's reception time is converted to an appropriate
34 * timestamp.
35 */
36#include <linux/ip.h>
37#include <linux/udp.h>
38#include <linux/time.h>
39#include <linux/ktime.h>
40#include <linux/module.h>
41#include <linux/net_tstamp.h>
42#include <linux/pps_kernel.h>
43#include <linux/ptp_clock_kernel.h>
44#include "net_driver.h"
45#include "efx.h"
46#include "mcdi.h"
47#include "mcdi_pcol.h"
48#include "io.h"
49#include "regs.h"
50#include "nic.h"
51
52/* Maximum number of events expected to make up a PTP event */
53#define MAX_EVENT_FRAGS 3
54
55/* Maximum delay, ms, to begin synchronisation */
56#define MAX_SYNCHRONISE_WAIT_MS 2
57
58/* How long, at most, to spend synchronising */
59#define SYNCHRONISE_PERIOD_NS 250000
60
61/* How often to update the shared memory time */
62#define SYNCHRONISATION_GRANULARITY_NS 200
63
64/* Minimum permitted length of a (corrected) synchronisation time */
65#define MIN_SYNCHRONISATION_NS 120
66
67/* Maximum permitted length of a (corrected) synchronisation time */
68#define MAX_SYNCHRONISATION_NS 1000
69
70/* How many (MC) receive events that can be queued */
71#define MAX_RECEIVE_EVENTS 8
72
73/* Length of (modified) moving average. */
74#define AVERAGE_LENGTH 16
75
76/* How long an unmatched event or packet can be held */
77#define PKT_EVENT_LIFETIME_MS 10
78
79/* Offsets into PTP packet for identification. These offsets are from the
80 * start of the IP header, not the MAC header. Note that neither PTP V1 nor
81 * PTP V2 permit the use of IPV4 options.
82 */
83#define PTP_DPORT_OFFSET 22
84
85#define PTP_V1_VERSION_LENGTH 2
86#define PTP_V1_VERSION_OFFSET 28
87
88#define PTP_V1_UUID_LENGTH 6
89#define PTP_V1_UUID_OFFSET 50
90
91#define PTP_V1_SEQUENCE_LENGTH 2
92#define PTP_V1_SEQUENCE_OFFSET 58
93
94/* The minimum length of a PTP V1 packet for offsets, etc. to be valid:
95 * includes IP header.
96 */
97#define PTP_V1_MIN_LENGTH 64
98
99#define PTP_V2_VERSION_LENGTH 1
100#define PTP_V2_VERSION_OFFSET 29
101
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
132enum 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
149/* Number of bits required to hold the above */
150#define MAX_PPB_BITS 20
151
152/* Number of extra bits allowed when calculating fractional ns.
153 * EXTRA_BITS + MC_CMD_PTP_IN_ADJUST_BITS + MAX_PPB_BITS should
154 * be less than 63.
155 */
156#define PPB_EXTRA_BITS 2
157
158/* Precalculate scale word to avoid long long division at runtime */
159#define PPB_SCALE_WORD ((1LL << (PPB_EXTRA_BITS + MC_CMD_PTP_IN_ADJUST_BITS +\
160 MAX_PPB_BITS)) / 1000000000LL)
161
162#define PTP_SYNC_ATTEMPTS 4
163
164/**
165 * struct efx_ptp_match - Matching structure, stored in sk_buff's cb area.
166 * @words: UUID and (partial) sequence number
167 * @expiry: Time after which the packet should be delivered irrespective of
168 * event arrival.
169 * @state: The state of the packet - whether it is ready for processing or
170 * whether that is of no interest.
171 */
172struct efx_ptp_match {
173 u32 words[DIV_ROUND_UP(PTP_V1_UUID_LENGTH, 4)];
174 unsigned long expiry;
175 enum ptp_packet_state state;
176};
177
178/**
179 * struct efx_ptp_event_rx - A PTP receive event (from MC)
180 * @seq0: First part of (PTP) UUID
181 * @seq1: Second part of (PTP) UUID and sequence number
182 * @hwtimestamp: Event timestamp
183 */
184struct efx_ptp_event_rx {
185 struct list_head link;
186 u32 seq0;
187 u32 seq1;
188 ktime_t hwtimestamp;
189 unsigned long expiry;
190};
191
192/**
193 * struct efx_ptp_timeset - Synchronisation between host and MC
194 * @host_start: Host time immediately before hardware timestamp taken
195 * @seconds: Hardware timestamp, seconds
196 * @nanoseconds: Hardware timestamp, nanoseconds
197 * @host_end: Host time immediately after hardware timestamp taken
198 * @waitns: Number of nanoseconds between hardware timestamp being read and
199 * host end time being seen
200 * @window: Difference of host_end and host_start
201 * @valid: Whether this timeset is valid
202 */
203struct efx_ptp_timeset {
204 u32 host_start;
205 u32 seconds;
206 u32 nanoseconds;
207 u32 host_end;
208 u32 waitns;
209 u32 window; /* Derived: end - start, allowing for wrap */
210};
211
212/**
213 * struct efx_ptp_data - Precision Time Protocol (PTP) state
214 * @channel: The PTP channel
215 * @rxq: Receive queue (awaiting timestamps)
216 * @txq: Transmit queue
217 * @evt_list: List of MC receive events awaiting packets
218 * @evt_free_list: List of free events
219 * @evt_lock: Lock for manipulating evt_list and evt_free_list
220 * @rx_evts: Instantiated events (on evt_list and evt_free_list)
221 * @workwq: Work queue for processing pending PTP operations
222 * @work: Work task
223 * @reset_required: A serious error has occurred and the PTP task needs to be
224 * reset (disable, enable).
225 * @rxfilter_event: Receive filter when operating
226 * @rxfilter_general: Receive filter when operating
227 * @config: Current timestamp configuration
228 * @enabled: PTP operation enabled
229 * @mode: Mode in which PTP operating (PTP version)
230 * @evt_frags: Partly assembled PTP events
231 * @evt_frag_idx: Current fragment number
232 * @evt_code: Last event code
233 * @start: Address at which MC indicates ready for synchronisation
234 * @host_time_pps: Host time at last PPS
235 * @last_sync_ns: Last number of nanoseconds between readings when synchronising
236 * @base_sync_ns: Number of nanoseconds for last synchronisation.
237 * @base_sync_valid: Whether base_sync_time is valid.
238 * @current_adjfreq: Current ppb adjustment.
239 * @phc_clock: Pointer to registered phc device
240 * @phc_clock_info: Registration structure for phc device
241 * @pps_work: pps work task for handling pps events
242 * @pps_workwq: pps work queue
243 * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled
244 * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids
245 * allocations in main data path).
246 * @debug_ptp_dir: PTP debugfs directory
247 * @missed_rx_sync: Number of packets received without syncrhonisation.
248 * @good_syncs: Number of successful synchronisations.
249 * @no_time_syncs: Number of synchronisations with no good times.
250 * @bad_sync_durations: Number of synchronisations with bad durations.
251 * @bad_syncs: Number of failed synchronisations.
252 * @last_sync_time: Number of nanoseconds for last synchronisation.
253 * @sync_timeouts: Number of synchronisation timeouts
254 * @fast_syncs: Number of synchronisations requiring short delay
255 * @min_sync_delta: Minimum time between event and synchronisation
256 * @max_sync_delta: Maximum time between event and synchronisation
257 * @average_sync_delta: Average time between event and synchronisation.
258 * Modified moving average.
259 * @last_sync_delta: Last time between event and synchronisation
260 * @mc_stats: Context value for MC statistics
261 * @timeset: Last set of synchronisation statistics.
262 */
263struct efx_ptp_data {
264 struct efx_channel *channel;
265 struct sk_buff_head rxq;
266 struct sk_buff_head txq;
267 struct list_head evt_list;
268 struct list_head evt_free_list;
269 spinlock_t evt_lock;
270 struct efx_ptp_event_rx rx_evts[MAX_RECEIVE_EVENTS];
271 struct workqueue_struct *workwq;
272 struct work_struct work;
273 bool reset_required;
274 u32 rxfilter_event;
275 u32 rxfilter_general;
276 bool rxfilter_installed;
277 struct hwtstamp_config config;
278 bool enabled;
279 unsigned int mode;
280 efx_qword_t evt_frags[MAX_EVENT_FRAGS];
281 int evt_frag_idx;
282 int evt_code;
283 struct efx_buffer start;
284 struct pps_event_time host_time_pps;
285 unsigned last_sync_ns;
286 unsigned base_sync_ns;
287 bool base_sync_valid;
288 s64 current_adjfreq;
289 struct ptp_clock *phc_clock;
290 struct ptp_clock_info phc_clock_info;
291 struct work_struct pps_work;
292 struct workqueue_struct *pps_workwq;
293 bool nic_ts_enabled;
294 u8 txbuf[ALIGN(MC_CMD_PTP_IN_TRANSMIT_LEN(
295 MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM), 4)];
296 struct efx_ptp_timeset
297 timeset[MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_MAXNUM];
298};
299
300static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta);
301static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta);
302static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts);
303static int efx_phc_settime(struct ptp_clock_info *ptp,
304 const struct timespec *e_ts);
305static int efx_phc_enable(struct ptp_clock_info *ptp,
306 struct ptp_clock_request *request, int on);
307
308/* Enable MCDI PTP support. */
309static int efx_ptp_enable(struct efx_nic *efx)
310{
311 u8 inbuf[MC_CMD_PTP_IN_ENABLE_LEN];
312
313 MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ENABLE);
314 MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_QUEUE,
315 efx->ptp_data->channel->channel);
316 MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_MODE, efx->ptp_data->mode);
317
318 return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
319 NULL, 0, NULL);
320}
321
322/* Disable MCDI PTP support.
323 *
324 * Note that this function should never rely on the presence of ptp_data -
325 * may be called before that exists.
326 */
327static int efx_ptp_disable(struct efx_nic *efx)
328{
329 u8 inbuf[MC_CMD_PTP_IN_DISABLE_LEN];
330
331 MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_DISABLE);
332 return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
333 NULL, 0, NULL);
334}
335
336static void efx_ptp_deliver_rx_queue(struct sk_buff_head *q)
337{
338 struct sk_buff *skb;
339
340 while ((skb = skb_dequeue(q))) {
341 local_bh_disable();
342 netif_receive_skb(skb);
343 local_bh_enable();
344 }
345}
346
347static void efx_ptp_handle_no_channel(struct efx_nic *efx)
348{
349 netif_err(efx, drv, efx->net_dev,
350 "ERROR: PTP requires MSI-X and 1 additional interrupt"
351 "vector. PTP disabled\n");
352}
353
354/* Repeatedly send the host time to the MC which will capture the hardware
355 * time.
356 */
357static void efx_ptp_send_times(struct efx_nic *efx,
358 struct pps_event_time *last_time)
359{
360 struct pps_event_time now;
361 struct timespec limit;
362 struct efx_ptp_data *ptp = efx->ptp_data;
363 struct timespec start;
364 int *mc_running = ptp->start.addr;
365
366 pps_get_ts(&now);
367 start = now.ts_real;
368 limit = now.ts_real;
369 timespec_add_ns(&limit, SYNCHRONISE_PERIOD_NS);
370
371 /* Write host time for specified period or until MC is done */
372 while ((timespec_compare(&now.ts_real, &limit) < 0) &&
373 ACCESS_ONCE(*mc_running)) {
374 struct timespec update_time;
375 unsigned int host_time;
376
377 /* Don't update continuously to avoid saturating the PCIe bus */
378 update_time = now.ts_real;
379 timespec_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS);
380 do {
381 pps_get_ts(&now);
382 } while ((timespec_compare(&now.ts_real, &update_time) < 0) &&
383 ACCESS_ONCE(*mc_running));
384
385 /* Synchronise NIC with single word of time only */
386 host_time = (now.ts_real.tv_sec << MC_NANOSECOND_BITS |
387 now.ts_real.tv_nsec);
388 /* Update host time in NIC memory */
389 _efx_writed(efx, cpu_to_le32(host_time),
390 FR_CZ_MC_TREG_SMEM + MC_SMEM_P0_PTP_TIME_OFST);
391 }
392 *last_time = now;
393}
394
395/* Read a timeset from the MC's results and partial process. */
396static void efx_ptp_read_timeset(u8 *data, struct efx_ptp_timeset *timeset)
397{
398 unsigned start_ns, end_ns;
399
400 timeset->host_start = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTSTART);
401 timeset->seconds = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_SECONDS);
402 timeset->nanoseconds = MCDI_DWORD(data,
403 PTP_OUT_SYNCHRONIZE_NANOSECONDS);
404 timeset->host_end = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTEND),
405 timeset->waitns = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS);
406
407 /* Ignore seconds */
408 start_ns = timeset->host_start & MC_NANOSECOND_MASK;
409 end_ns = timeset->host_end & MC_NANOSECOND_MASK;
410 /* Allow for rollover */
411 if (end_ns < start_ns)
412 end_ns += NSEC_PER_SEC;
413 /* Determine duration of operation */
414 timeset->window = end_ns - start_ns;
415}
416
417/* Process times received from MC.
418 *
419 * Extract times from returned results, and establish the minimum value
420 * seen. The minimum value represents the "best" possible time and events
421 * too much greater than this are rejected - the machine is, perhaps, too
422 * busy. A number of readings are taken so that, hopefully, at least one good
423 * synchronisation will be seen in the results.
424 */
425static int efx_ptp_process_times(struct efx_nic *efx, u8 *synch_buf,
426 size_t response_length,
427 const struct pps_event_time *last_time)
428{
429 unsigned number_readings = (response_length /
430 MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_LEN);
431 unsigned i;
432 unsigned min;
433 unsigned min_set = 0;
434 unsigned total;
435 unsigned ngood = 0;
436 unsigned last_good = 0;
437 struct efx_ptp_data *ptp = efx->ptp_data;
438 bool min_valid = false;
439 u32 last_sec;
440 u32 start_sec;
441 struct timespec delta;
442
443 if (number_readings == 0)
444 return -EAGAIN;
445
446 /* Find minimum value in this set of results, discarding clearly
447 * erroneous results.
448 */
449 for (i = 0; i < number_readings; i++) {
450 efx_ptp_read_timeset(synch_buf, &ptp->timeset[i]);
451 synch_buf += MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_LEN;
452 if (ptp->timeset[i].window > SYNCHRONISATION_GRANULARITY_NS) {
453 if (min_valid) {
454 if (ptp->timeset[i].window < min_set)
455 min_set = ptp->timeset[i].window;
456 } else {
457 min_valid = true;
458 min_set = ptp->timeset[i].window;
459 }
460 }
461 }
462
463 if (min_valid) {
464 if (ptp->base_sync_valid && (min_set > ptp->base_sync_ns))
465 min = ptp->base_sync_ns;
466 else
467 min = min_set;
468 } else {
469 min = SYNCHRONISATION_GRANULARITY_NS;
470 }
471
472 /* Discard excessively long synchronise durations. The MC times
473 * when it finishes reading the host time so the corrected window
474 * time should be fairly constant for a given platform.
475 */
476 total = 0;
477 for (i = 0; i < number_readings; i++)
478 if (ptp->timeset[i].window > ptp->timeset[i].waitns) {
479 unsigned win;
480
481 win = ptp->timeset[i].window - ptp->timeset[i].waitns;
482 if (win >= MIN_SYNCHRONISATION_NS &&
483 win < MAX_SYNCHRONISATION_NS) {
484 total += ptp->timeset[i].window;
485 ngood++;
486 last_good = i;
487 }
488 }
489
490 if (ngood == 0) {
491 netif_warn(efx, drv, efx->net_dev,
492 "PTP no suitable synchronisations %dns %dns\n",
493 ptp->base_sync_ns, min_set);
494 return -EAGAIN;
495 }
496
497 /* Average minimum this synchronisation */
498 ptp->last_sync_ns = DIV_ROUND_UP(total, ngood);
499 if (!ptp->base_sync_valid || (ptp->last_sync_ns < ptp->base_sync_ns)) {
500 ptp->base_sync_valid = true;
501 ptp->base_sync_ns = ptp->last_sync_ns;
502 }
503
504 /* Calculate delay from actual PPS to last_time */
505 delta.tv_nsec =
506 ptp->timeset[last_good].nanoseconds +
507 last_time->ts_real.tv_nsec -
508 (ptp->timeset[last_good].host_start & MC_NANOSECOND_MASK);
509
510 /* It is possible that the seconds rolled over between taking
511 * the start reading and the last value written by the host. The
512 * timescales are such that a gap of more than one second is never
513 * expected.
514 */
515 start_sec = ptp->timeset[last_good].host_start >> MC_NANOSECOND_BITS;
516 last_sec = last_time->ts_real.tv_sec & MC_SECOND_MASK;
517 if (start_sec != last_sec) {
518 if (((start_sec + 1) & MC_SECOND_MASK) != last_sec) {
519 netif_warn(efx, hw, efx->net_dev,
520 "PTP bad synchronisation seconds\n");
521 return -EAGAIN;
522 } else {
523 delta.tv_sec = 1;
524 }
525 } else {
526 delta.tv_sec = 0;
527 }
528
529 ptp->host_time_pps = *last_time;
530 pps_sub_ts(&ptp->host_time_pps, delta);
531
532 return 0;
533}
534
535/* Synchronize times between the host and the MC */
536static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings)
537{
538 struct efx_ptp_data *ptp = efx->ptp_data;
539 u8 synch_buf[MC_CMD_PTP_OUT_SYNCHRONIZE_LENMAX];
540 size_t response_length;
541 int rc;
542 unsigned long timeout;
543 struct pps_event_time last_time = {};
544 unsigned int loops = 0;
545 int *start = ptp->start.addr;
546
547 MCDI_SET_DWORD(synch_buf, PTP_IN_OP, MC_CMD_PTP_OP_SYNCHRONIZE);
548 MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_NUMTIMESETS,
549 num_readings);
550 MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR_LO,
551 (u32)ptp->start.dma_addr);
552 MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR_HI,
553 (u32)((u64)ptp->start.dma_addr >> 32));
554
555 /* Clear flag that signals MC ready */
556 ACCESS_ONCE(*start) = 0;
557 efx_mcdi_rpc_start(efx, MC_CMD_PTP, synch_buf,
558 MC_CMD_PTP_IN_SYNCHRONIZE_LEN);
559
560 /* Wait for start from MCDI (or timeout) */
561 timeout = jiffies + msecs_to_jiffies(MAX_SYNCHRONISE_WAIT_MS);
562 while (!ACCESS_ONCE(*start) && (time_before(jiffies, timeout))) {
563 udelay(20); /* Usually start MCDI execution quickly */
564 loops++;
565 }
566
567 if (ACCESS_ONCE(*start))
568 efx_ptp_send_times(efx, &last_time);
569
570 /* Collect results */
571 rc = efx_mcdi_rpc_finish(efx, MC_CMD_PTP,
572 MC_CMD_PTP_IN_SYNCHRONIZE_LEN,
573 synch_buf, sizeof(synch_buf),
574 &response_length);
575 if (rc == 0)
576 rc = efx_ptp_process_times(efx, synch_buf, response_length,
577 &last_time);
578
579 return rc;
580}
581
582/* Transmit a PTP packet, via the MCDI interface, to the wire. */
583static int efx_ptp_xmit_skb(struct efx_nic *efx, struct sk_buff *skb)
584{
585 u8 *txbuf = efx->ptp_data->txbuf;
586 struct skb_shared_hwtstamps timestamps;
587 int rc = -EIO;
588 /* MCDI driver requires word aligned lengths */
589 size_t len = ALIGN(MC_CMD_PTP_IN_TRANSMIT_LEN(skb->len), 4);
590 u8 txtime[MC_CMD_PTP_OUT_TRANSMIT_LEN];
591
592 MCDI_SET_DWORD(txbuf, PTP_IN_OP, MC_CMD_PTP_OP_TRANSMIT);
593 MCDI_SET_DWORD(txbuf, PTP_IN_TRANSMIT_LENGTH, skb->len);
594 if (skb_shinfo(skb)->nr_frags != 0) {
595 rc = skb_linearize(skb);
596 if (rc != 0)
597 goto fail;
598 }
599
600 if (skb->ip_summed == CHECKSUM_PARTIAL) {
601 rc = skb_checksum_help(skb);
602 if (rc != 0)
603 goto fail;
604 }
605 skb_copy_from_linear_data(skb,
606 &txbuf[MC_CMD_PTP_IN_TRANSMIT_PACKET_OFST],
607 len);
608 rc = efx_mcdi_rpc(efx, MC_CMD_PTP, txbuf, len, txtime,
609 sizeof(txtime), &len);
610 if (rc != 0)
611 goto fail;
612
613 memset(&timestamps, 0, sizeof(timestamps));
614 timestamps.hwtstamp = ktime_set(
615 MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_SECONDS),
616 MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_NANOSECONDS));
617
618 skb_tstamp_tx(skb, &timestamps);
619
620 rc = 0;
621
622fail:
623 dev_kfree_skb(skb);
624
625 return rc;
626}
627
628static void efx_ptp_drop_time_expired_events(struct efx_nic *efx)
629{
630 struct efx_ptp_data *ptp = efx->ptp_data;
631 struct list_head *cursor;
632 struct list_head *next;
633
634 /* Drop time-expired events */
635 spin_lock_bh(&ptp->evt_lock);
636 if (!list_empty(&ptp->evt_list)) {
637 list_for_each_safe(cursor, next, &ptp->evt_list) {
638 struct efx_ptp_event_rx *evt;
639
640 evt = list_entry(cursor, struct efx_ptp_event_rx,
641 link);
642 if (time_after(jiffies, evt->expiry)) {
643 list_del(&evt->link);
644 list_add(&evt->link, &ptp->evt_free_list);
645 netif_warn(efx, hw, efx->net_dev,
646 "PTP rx event dropped\n");
647 }
648 }
649 }
650 spin_unlock_bh(&ptp->evt_lock);
651}
652
653static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx,
654 struct sk_buff *skb)
655{
656 struct efx_ptp_data *ptp = efx->ptp_data;
657 bool evts_waiting;
658 struct list_head *cursor;
659 struct list_head *next;
660 struct efx_ptp_match *match;
661 enum ptp_packet_state rc = PTP_PACKET_STATE_UNMATCHED;
662
663 spin_lock_bh(&ptp->evt_lock);
664 evts_waiting = !list_empty(&ptp->evt_list);
665 spin_unlock_bh(&ptp->evt_lock);
666
667 if (!evts_waiting)
668 return PTP_PACKET_STATE_UNMATCHED;
669
670 match = (struct efx_ptp_match *)skb->cb;
671 /* Look for a matching timestamp in the event queue */
672 spin_lock_bh(&ptp->evt_lock);
673 list_for_each_safe(cursor, next, &ptp->evt_list) {
674 struct efx_ptp_event_rx *evt;
675
676 evt = list_entry(cursor, struct efx_ptp_event_rx, link);
677 if ((evt->seq0 == match->words[0]) &&
678 (evt->seq1 == match->words[1])) {
679 struct skb_shared_hwtstamps *timestamps;
680
681 /* Match - add in hardware timestamp */
682 timestamps = skb_hwtstamps(skb);
683 timestamps->hwtstamp = evt->hwtimestamp;
684
685 match->state = PTP_PACKET_STATE_MATCHED;
686 rc = PTP_PACKET_STATE_MATCHED;
687 list_del(&evt->link);
688 list_add(&evt->link, &ptp->evt_free_list);
689 break;
690 }
691 }
692 spin_unlock_bh(&ptp->evt_lock);
693
694 return rc;
695}
696
697/* Process any queued receive events and corresponding packets
698 *
699 * q is returned with all the packets that are ready for delivery.
700 * true is returned if at least one of those packets requires
701 * synchronisation.
702 */
703static bool efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q)
704{
705 struct efx_ptp_data *ptp = efx->ptp_data;
706 bool rc = false;
707 struct sk_buff *skb;
708
709 while ((skb = skb_dequeue(&ptp->rxq))) {
710 struct efx_ptp_match *match;
711
712 match = (struct efx_ptp_match *)skb->cb;
713 if (match->state == PTP_PACKET_STATE_MATCH_UNWANTED) {
714 __skb_queue_tail(q, skb);
715 } else if (efx_ptp_match_rx(efx, skb) ==
716 PTP_PACKET_STATE_MATCHED) {
717 rc = true;
718 __skb_queue_tail(q, skb);
719 } else if (time_after(jiffies, match->expiry)) {
720 match->state = PTP_PACKET_STATE_TIMED_OUT;
721 netif_warn(efx, rx_err, efx->net_dev,
722 "PTP packet - no timestamp seen\n");
723 __skb_queue_tail(q, skb);
724 } else {
725 /* Replace unprocessed entry and stop */
726 skb_queue_head(&ptp->rxq, skb);
727 break;
728 }
729 }
730
731 return rc;
732}
733
734/* Complete processing of a received packet */
735static inline void efx_ptp_process_rx(struct efx_nic *efx, struct sk_buff *skb)
736{
737 local_bh_disable();
738 netif_receive_skb(skb);
739 local_bh_enable();
740}
741
742static int efx_ptp_start(struct efx_nic *efx)
743{
744 struct efx_ptp_data *ptp = efx->ptp_data;
745 struct efx_filter_spec rxfilter;
746 int rc;
747
748 ptp->reset_required = false;
749
750 /* Must filter on both event and general ports to ensure
751 * that there is no packet re-ordering.
752 */
753 efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
754 efx_rx_queue_index(
755 efx_channel_get_rx_queue(ptp->channel)));
756 rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
757 htonl(PTP_ADDRESS),
758 htons(PTP_EVENT_PORT));
759 if (rc != 0)
760 return rc;
761
762 rc = efx_filter_insert_filter(efx, &rxfilter, true);
763 if (rc < 0)
764 return rc;
765 ptp->rxfilter_event = rc;
766
767 efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
768 efx_rx_queue_index(
769 efx_channel_get_rx_queue(ptp->channel)));
770 rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
771 htonl(PTP_ADDRESS),
772 htons(PTP_GENERAL_PORT));
773 if (rc != 0)
774 goto fail;
775
776 rc = efx_filter_insert_filter(efx, &rxfilter, true);
777 if (rc < 0)
778 goto fail;
779 ptp->rxfilter_general = rc;
780
781 rc = efx_ptp_enable(efx);
782 if (rc != 0)
783 goto fail2;
784
785 ptp->evt_frag_idx = 0;
786 ptp->current_adjfreq = 0;
787 ptp->rxfilter_installed = true;
788
789 return 0;
790
791fail2:
792 efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
793 ptp->rxfilter_general);
794fail:
795 efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
796 ptp->rxfilter_event);
797
798 return rc;
799}
800
801static int efx_ptp_stop(struct efx_nic *efx)
802{
803 struct efx_ptp_data *ptp = efx->ptp_data;
804 int rc = efx_ptp_disable(efx);
805 struct list_head *cursor;
806 struct list_head *next;
807
808 if (ptp->rxfilter_installed) {
809 efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
810 ptp->rxfilter_general);
811 efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
812 ptp->rxfilter_event);
813 ptp->rxfilter_installed = false;
814 }
815
816 /* Make sure RX packets are really delivered */
817 efx_ptp_deliver_rx_queue(&efx->ptp_data->rxq);
818 skb_queue_purge(&efx->ptp_data->txq);
819
820 /* Drop any pending receive events */
821 spin_lock_bh(&efx->ptp_data->evt_lock);
822 list_for_each_safe(cursor, next, &efx->ptp_data->evt_list) {
823 list_del(cursor);
824 list_add(cursor, &efx->ptp_data->evt_free_list);
825 }
826 spin_unlock_bh(&efx->ptp_data->evt_lock);
827
828 return rc;
829}
830
831static void efx_ptp_pps_worker(struct work_struct *work)
832{
833 struct efx_ptp_data *ptp =
834 container_of(work, struct efx_ptp_data, pps_work);
835 struct efx_nic *efx = ptp->channel->efx;
836 struct ptp_clock_event ptp_evt;
837
838 if (efx_ptp_synchronize(efx, PTP_SYNC_ATTEMPTS))
839 return;
840
841 ptp_evt.type = PTP_CLOCK_PPSUSR;
842 ptp_evt.pps_times = ptp->host_time_pps;
843 ptp_clock_event(ptp->phc_clock, &ptp_evt);
844}
845
846/* Process any pending transmissions and timestamp any received packets.
847 */
848static void efx_ptp_worker(struct work_struct *work)
849{
850 struct efx_ptp_data *ptp_data =
851 container_of(work, struct efx_ptp_data, work);
852 struct efx_nic *efx = ptp_data->channel->efx;
853 struct sk_buff *skb;
854 struct sk_buff_head tempq;
855
856 if (ptp_data->reset_required) {
857 efx_ptp_stop(efx);
858 efx_ptp_start(efx);
859 return;
860 }
861
862 efx_ptp_drop_time_expired_events(efx);
863
864 __skb_queue_head_init(&tempq);
865 if (efx_ptp_process_events(efx, &tempq) ||
866 !skb_queue_empty(&ptp_data->txq)) {
867
868 while ((skb = skb_dequeue(&ptp_data->txq)))
869 efx_ptp_xmit_skb(efx, skb);
870 }
871
872 while ((skb = __skb_dequeue(&tempq)))
873 efx_ptp_process_rx(efx, skb);
874}
875
876/* Initialise PTP channel and state.
877 *
878 * Setting core_index to zero causes the queue to be initialised and doesn't
879 * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue.
880 */
881static int efx_ptp_probe_channel(struct efx_channel *channel)
882{
883 struct efx_nic *efx = channel->efx;
884 struct efx_ptp_data *ptp;
885 int rc = 0;
886 unsigned int pos;
887
888 channel->irq_moderation = 0;
889 channel->rx_queue.core_index = 0;
890
891 ptp = kzalloc(sizeof(struct efx_ptp_data), GFP_KERNEL);
892 efx->ptp_data = ptp;
893 if (!efx->ptp_data)
894 return -ENOMEM;
895
896 rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int));
897 if (rc != 0)
898 goto fail1;
899
900 ptp->channel = channel;
901 skb_queue_head_init(&ptp->rxq);
902 skb_queue_head_init(&ptp->txq);
903 ptp->workwq = create_singlethread_workqueue("sfc_ptp");
904 if (!ptp->workwq) {
905 rc = -ENOMEM;
906 goto fail2;
907 }
908
909 INIT_WORK(&ptp->work, efx_ptp_worker);
910 ptp->config.flags = 0;
911 ptp->config.tx_type = HWTSTAMP_TX_OFF;
912 ptp->config.rx_filter = HWTSTAMP_FILTER_NONE;
913 INIT_LIST_HEAD(&ptp->evt_list);
914 INIT_LIST_HEAD(&ptp->evt_free_list);
915 spin_lock_init(&ptp->evt_lock);
916 for (pos = 0; pos < MAX_RECEIVE_EVENTS; pos++)
917 list_add(&ptp->rx_evts[pos].link, &ptp->evt_free_list);
918
919 ptp->phc_clock_info.owner = THIS_MODULE;
920 snprintf(ptp->phc_clock_info.name,
921 sizeof(ptp->phc_clock_info.name),
922 "%pm", efx->net_dev->perm_addr);
923 ptp->phc_clock_info.max_adj = MAX_PPB;
924 ptp->phc_clock_info.n_alarm = 0;
925 ptp->phc_clock_info.n_ext_ts = 0;
926 ptp->phc_clock_info.n_per_out = 0;
927 ptp->phc_clock_info.pps = 1;
928 ptp->phc_clock_info.adjfreq = efx_phc_adjfreq;
929 ptp->phc_clock_info.adjtime = efx_phc_adjtime;
930 ptp->phc_clock_info.gettime = efx_phc_gettime;
931 ptp->phc_clock_info.settime = efx_phc_settime;
932 ptp->phc_clock_info.enable = efx_phc_enable;
933
934 ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info);
935 if (!ptp->phc_clock)
936 goto fail3;
937
938 INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker);
939 ptp->pps_workwq = create_singlethread_workqueue("sfc_pps");
940 if (!ptp->pps_workwq) {
941 rc = -ENOMEM;
942 goto fail4;
943 }
944 ptp->nic_ts_enabled = false;
945
946 return 0;
947fail4:
948 ptp_clock_unregister(efx->ptp_data->phc_clock);
949
950fail3:
951 destroy_workqueue(efx->ptp_data->workwq);
952
953fail2:
954 efx_nic_free_buffer(efx, &ptp->start);
955
956fail1:
957 kfree(efx->ptp_data);
958 efx->ptp_data = NULL;
959
960 return rc;
961}
962
963static void efx_ptp_remove_channel(struct efx_channel *channel)
964{
965 struct efx_nic *efx = channel->efx;
966
967 if (!efx->ptp_data)
968 return;
969
970 (void)efx_ptp_disable(channel->efx);
971
972 cancel_work_sync(&efx->ptp_data->work);
973 cancel_work_sync(&efx->ptp_data->pps_work);
974
975 skb_queue_purge(&efx->ptp_data->rxq);
976 skb_queue_purge(&efx->ptp_data->txq);
977
978 ptp_clock_unregister(efx->ptp_data->phc_clock);
979
980 destroy_workqueue(efx->ptp_data->workwq);
981 destroy_workqueue(efx->ptp_data->pps_workwq);
982
983 efx_nic_free_buffer(efx, &efx->ptp_data->start);
984 kfree(efx->ptp_data);
985}
986
987static void efx_ptp_get_channel_name(struct efx_channel *channel,
988 char *buf, size_t len)
989{
990 snprintf(buf, len, "%s-ptp", channel->efx->name);
991}
992
993/* Determine whether this packet should be processed by the PTP module
994 * or transmitted conventionally.
995 */
996bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
997{
998 return efx->ptp_data &&
999 efx->ptp_data->enabled &&
1000 skb->len >= PTP_MIN_LENGTH &&
1001 skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM &&
1002 likely(skb->protocol == htons(ETH_P_IP)) &&
1003 ip_hdr(skb)->protocol == IPPROTO_UDP &&
1004 udp_hdr(skb)->dest == htons(PTP_EVENT_PORT);
1005}
1006
1007/* Receive a PTP packet. Packets are queued until the arrival of
1008 * the receive timestamp from the MC - this will probably occur after the
1009 * packet arrival because of the processing in the MC.
1010 */
1011static void efx_ptp_rx(struct efx_channel *channel, struct sk_buff *skb)
1012{
1013 struct efx_nic *efx = channel->efx;
1014 struct efx_ptp_data *ptp = efx->ptp_data;
1015 struct efx_ptp_match *match = (struct efx_ptp_match *)skb->cb;
1016 u8 *data;
1017 unsigned int version;
1018
1019 match->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
1020
1021 /* Correct version? */
1022 if (ptp->mode == MC_CMD_PTP_MODE_V1) {
1023 if (skb->len < PTP_V1_MIN_LENGTH) {
1024 netif_receive_skb(skb);
1025 return;
1026 }
1027 version = ntohs(*(__be16 *)&skb->data[PTP_V1_VERSION_OFFSET]);
1028 if (version != PTP_VERSION_V1) {
1029 netif_receive_skb(skb);
1030 return;
1031 }
1032 } else {
1033 if (skb->len < PTP_V2_MIN_LENGTH) {
1034 netif_receive_skb(skb);
1035 return;
1036 }
1037 version = skb->data[PTP_V2_VERSION_OFFSET];
1038
1039 BUG_ON(ptp->mode != MC_CMD_PTP_MODE_V2);
1040 BUILD_BUG_ON(PTP_V1_UUID_OFFSET != PTP_V2_MC_UUID_OFFSET);
1041 BUILD_BUG_ON(PTP_V1_UUID_LENGTH != PTP_V2_MC_UUID_LENGTH);
1042 BUILD_BUG_ON(PTP_V1_SEQUENCE_OFFSET != PTP_V2_SEQUENCE_OFFSET);
1043 BUILD_BUG_ON(PTP_V1_SEQUENCE_LENGTH != PTP_V2_SEQUENCE_LENGTH);
1044
1045 if ((version & PTP_VERSION_V2_MASK) != PTP_VERSION_V2) {
1046 netif_receive_skb(skb);
1047 return;
1048 }
1049 }
1050
1051 /* Does this packet require timestamping? */
1052 if (ntohs(*(__be16 *)&skb->data[PTP_DPORT_OFFSET]) == PTP_EVENT_PORT) {
1053 struct skb_shared_hwtstamps *timestamps;
1054
1055 match->state = PTP_PACKET_STATE_UNMATCHED;
1056
1057 /* Clear all timestamps held: filled in later */
1058 timestamps = skb_hwtstamps(skb);
1059 memset(timestamps, 0, sizeof(*timestamps));
1060
1061 /* Extract UUID/Sequence information */
1062 data = skb->data + PTP_V1_UUID_OFFSET;
1063 match->words[0] = (data[0] |
1064 (data[1] << 8) |
1065 (data[2] << 16) |
1066 (data[3] << 24));
1067 match->words[1] = (data[4] |
1068 (data[5] << 8) |
1069 (skb->data[PTP_V1_SEQUENCE_OFFSET +
1070 PTP_V1_SEQUENCE_LENGTH - 1] <<
1071 16));
1072 } else {
1073 match->state = PTP_PACKET_STATE_MATCH_UNWANTED;
1074 }
1075
1076 skb_queue_tail(&ptp->rxq, skb);
1077 queue_work(ptp->workwq, &ptp->work);
1078}
1079
1080/* Transmit a PTP packet. This has to be transmitted by the MC
1081 * itself, through an MCDI call. MCDI calls aren't permitted
1082 * in the transmit path so defer the actual transmission to a suitable worker.
1083 */
1084int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
1085{
1086 struct efx_ptp_data *ptp = efx->ptp_data;
1087
1088 skb_queue_tail(&ptp->txq, skb);
1089
1090 if ((udp_hdr(skb)->dest == htons(PTP_EVENT_PORT)) &&
1091 (skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM))
1092 efx_xmit_hwtstamp_pending(skb);
1093 queue_work(ptp->workwq, &ptp->work);
1094
1095 return NETDEV_TX_OK;
1096}
1097
1098static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
1099 unsigned int new_mode)
1100{
1101 if ((enable_wanted != efx->ptp_data->enabled) ||
1102 (enable_wanted && (efx->ptp_data->mode != new_mode))) {
1103 int rc;
1104
1105 if (enable_wanted) {
1106 /* Change of mode requires disable */
1107 if (efx->ptp_data->enabled &&
1108 (efx->ptp_data->mode != new_mode)) {
1109 efx->ptp_data->enabled = false;
1110 rc = efx_ptp_stop(efx);
1111 if (rc != 0)
1112 return rc;
1113 }
1114
1115 /* Set new operating mode and establish
1116 * baseline synchronisation, which must
1117 * succeed.
1118 */
1119 efx->ptp_data->mode = new_mode;
1120 rc = efx_ptp_start(efx);
1121 if (rc == 0) {
1122 rc = efx_ptp_synchronize(efx,
1123 PTP_SYNC_ATTEMPTS * 2);
1124 if (rc != 0)
1125 efx_ptp_stop(efx);
1126 }
1127 } else {
1128 rc = efx_ptp_stop(efx);
1129 }
1130
1131 if (rc != 0)
1132 return rc;
1133
1134 efx->ptp_data->enabled = enable_wanted;
1135 }
1136
1137 return 0;
1138}
1139
1140static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init)
1141{
1142 bool enable_wanted = false;
1143 unsigned int new_mode;
1144 int rc;
1145
1146 if (init->flags)
1147 return -EINVAL;
1148
1149 if ((init->tx_type != HWTSTAMP_TX_OFF) &&
1150 (init->tx_type != HWTSTAMP_TX_ON))
1151 return -ERANGE;
1152
1153 new_mode = efx->ptp_data->mode;
1154 /* Determine whether any PTP HW operations are required */
1155 switch (init->rx_filter) {
1156 case HWTSTAMP_FILTER_NONE:
1157 break;
1158 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1159 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1160 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1161 init->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
1162 new_mode = MC_CMD_PTP_MODE_V1;
1163 enable_wanted = true;
1164 break;
1165 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1166 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1167 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1168 /* Although these three are accepted only IPV4 packets will be
1169 * timestamped
1170 */
1171 init->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
1172 new_mode = MC_CMD_PTP_MODE_V2;
1173 enable_wanted = true;
1174 break;
1175 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1176 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1177 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1178 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1179 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1180 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1181 /* Non-IP + IPv6 timestamping not supported */
1182 return -ERANGE;
1183 break;
1184 default:
1185 return -ERANGE;
1186 }
1187
1188 if (init->tx_type != HWTSTAMP_TX_OFF)
1189 enable_wanted = true;
1190
1191 rc = efx_ptp_change_mode(efx, enable_wanted, new_mode);
1192 if (rc != 0)
1193 return rc;
1194
1195 efx->ptp_data->config = *init;
1196
1197 return 0;
1198}
1199
1200int
1201efx_ptp_get_ts_info(struct net_device *net_dev, struct ethtool_ts_info *ts_info)
1202{
1203 struct efx_nic *efx = netdev_priv(net_dev);
1204 struct efx_ptp_data *ptp = efx->ptp_data;
1205
1206 if (!ptp)
1207 return -EOPNOTSUPP;
1208
1209 ts_info->so_timestamping = (SOF_TIMESTAMPING_TX_HARDWARE |
1210 SOF_TIMESTAMPING_RX_HARDWARE |
1211 SOF_TIMESTAMPING_RAW_HARDWARE);
1212 ts_info->phc_index = ptp_clock_index(ptp->phc_clock);
1213 ts_info->tx_types = 1 << HWTSTAMP_TX_OFF | 1 << HWTSTAMP_TX_ON;
1214 ts_info->rx_filters = (1 << HWTSTAMP_FILTER_NONE |
1215 1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT |
1216 1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC |
1217 1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ |
1218 1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT |
1219 1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC |
1220 1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ);
1221 return 0;
1222}
1223
1224int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd)
1225{
1226 struct hwtstamp_config config;
1227 int rc;
1228
1229 /* Not a PTP enabled port */
1230 if (!efx->ptp_data)
1231 return -EOPNOTSUPP;
1232
1233 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1234 return -EFAULT;
1235
1236 rc = efx_ptp_ts_init(efx, &config);
1237 if (rc != 0)
1238 return rc;
1239
1240 return copy_to_user(ifr->ifr_data, &config, sizeof(config))
1241 ? -EFAULT : 0;
1242}
1243
1244static void ptp_event_failure(struct efx_nic *efx, int expected_frag_len)
1245{
1246 struct efx_ptp_data *ptp = efx->ptp_data;
1247
1248 netif_err(efx, hw, efx->net_dev,
1249 "PTP unexpected event length: got %d expected %d\n",
1250 ptp->evt_frag_idx, expected_frag_len);
1251 ptp->reset_required = true;
1252 queue_work(ptp->workwq, &ptp->work);
1253}
1254
1255/* Process a completed receive event. Put it on the event queue and
1256 * start worker thread. This is required because event and their
1257 * correspoding packets may come in either order.
1258 */
1259static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp)
1260{
1261 struct efx_ptp_event_rx *evt = NULL;
1262
1263 if (ptp->evt_frag_idx != 3) {
1264 ptp_event_failure(efx, 3);
1265 return;
1266 }
1267
1268 spin_lock_bh(&ptp->evt_lock);
1269 if (!list_empty(&ptp->evt_free_list)) {
1270 evt = list_first_entry(&ptp->evt_free_list,
1271 struct efx_ptp_event_rx, link);
1272 list_del(&evt->link);
1273
1274 evt->seq0 = EFX_QWORD_FIELD(ptp->evt_frags[2], MCDI_EVENT_DATA);
1275 evt->seq1 = (EFX_QWORD_FIELD(ptp->evt_frags[2],
1276 MCDI_EVENT_SRC) |
1277 (EFX_QWORD_FIELD(ptp->evt_frags[1],
1278 MCDI_EVENT_SRC) << 8) |
1279 (EFX_QWORD_FIELD(ptp->evt_frags[0],
1280 MCDI_EVENT_SRC) << 16));
1281 evt->hwtimestamp = ktime_set(
1282 EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA),
1283 EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA));
1284 evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
1285 list_add_tail(&evt->link, &ptp->evt_list);
1286
1287 queue_work(ptp->workwq, &ptp->work);
1288 } else {
1289 netif_err(efx, rx_err, efx->net_dev, "No free PTP event");
1290 }
1291 spin_unlock_bh(&ptp->evt_lock);
1292}
1293
1294static void ptp_event_fault(struct efx_nic *efx, struct efx_ptp_data *ptp)
1295{
1296 int code = EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA);
1297 if (ptp->evt_frag_idx != 1) {
1298 ptp_event_failure(efx, 1);
1299 return;
1300 }
1301
1302 netif_err(efx, hw, efx->net_dev, "PTP error %d\n", code);
1303}
1304
1305static void ptp_event_pps(struct efx_nic *efx, struct efx_ptp_data *ptp)
1306{
1307 if (ptp->nic_ts_enabled)
1308 queue_work(ptp->pps_workwq, &ptp->pps_work);
1309}
1310
1311void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev)
1312{
1313 struct efx_ptp_data *ptp = efx->ptp_data;
1314 int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE);
1315
1316 if (!ptp->enabled)
1317 return;
1318
1319 if (ptp->evt_frag_idx == 0) {
1320 ptp->evt_code = code;
1321 } else if (ptp->evt_code != code) {
1322 netif_err(efx, hw, efx->net_dev,
1323 "PTP out of sequence event %d\n", code);
1324 ptp->evt_frag_idx = 0;
1325 }
1326
1327 ptp->evt_frags[ptp->evt_frag_idx++] = *ev;
1328 if (!MCDI_EVENT_FIELD(*ev, CONT)) {
1329 /* Process resulting event */
1330 switch (code) {
1331 case MCDI_EVENT_CODE_PTP_RX:
1332 ptp_event_rx(efx, ptp);
1333 break;
1334 case MCDI_EVENT_CODE_PTP_FAULT:
1335 ptp_event_fault(efx, ptp);
1336 break;
1337 case MCDI_EVENT_CODE_PTP_PPS:
1338 ptp_event_pps(efx, ptp);
1339 break;
1340 default:
1341 netif_err(efx, hw, efx->net_dev,
1342 "PTP unknown event %d\n", code);
1343 break;
1344 }
1345 ptp->evt_frag_idx = 0;
1346 } else if (MAX_EVENT_FRAGS == ptp->evt_frag_idx) {
1347 netif_err(efx, hw, efx->net_dev,
1348 "PTP too many event fragments\n");
1349 ptp->evt_frag_idx = 0;
1350 }
1351}
1352
1353static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
1354{
1355 struct efx_ptp_data *ptp_data = container_of(ptp,
1356 struct efx_ptp_data,
1357 phc_clock_info);
1358 struct efx_nic *efx = ptp_data->channel->efx;
1359 u8 inadj[MC_CMD_PTP_IN_ADJUST_LEN];
1360 s64 adjustment_ns;
1361 int rc;
1362
1363 if (delta > MAX_PPB)
1364 delta = MAX_PPB;
1365 else if (delta < -MAX_PPB)
1366 delta = -MAX_PPB;
1367
1368 /* Convert ppb to fixed point ns. */
1369 adjustment_ns = (((s64)delta * PPB_SCALE_WORD) >>
1370 (PPB_EXTRA_BITS + MAX_PPB_BITS));
1371
1372 MCDI_SET_DWORD(inadj, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
1373 MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_FREQ_LO, (u32)adjustment_ns);
1374 MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_FREQ_HI,
1375 (u32)(adjustment_ns >> 32));
1376 MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_SECONDS, 0);
1377 MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_NANOSECONDS, 0);
1378 rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inadj, sizeof(inadj),
1379 NULL, 0, NULL);
1380 if (rc != 0)
1381 return rc;
1382
1383 ptp_data->current_adjfreq = delta;
1384 return 0;
1385}
1386
1387static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta)
1388{
1389 struct efx_ptp_data *ptp_data = container_of(ptp,
1390 struct efx_ptp_data,
1391 phc_clock_info);
1392 struct efx_nic *efx = ptp_data->channel->efx;
1393 struct timespec delta_ts = ns_to_timespec(delta);
1394 u8 inbuf[MC_CMD_PTP_IN_ADJUST_LEN];
1395
1396 MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
1397 MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_FREQ_LO, 0);
1398 MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_FREQ_HI, 0);
1399 MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_SECONDS, (u32)delta_ts.tv_sec);
1400 MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_NANOSECONDS, (u32)delta_ts.tv_nsec);
1401 return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
1402 NULL, 0, NULL);
1403}
1404
1405static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
1406{
1407 struct efx_ptp_data *ptp_data = container_of(ptp,
1408 struct efx_ptp_data,
1409 phc_clock_info);
1410 struct efx_nic *efx = ptp_data->channel->efx;
1411 u8 inbuf[MC_CMD_PTP_IN_READ_NIC_TIME_LEN];
1412 u8 outbuf[MC_CMD_PTP_OUT_READ_NIC_TIME_LEN];
1413 int rc;
1414
1415 MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_READ_NIC_TIME);
1416
1417 rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
1418 outbuf, sizeof(outbuf), NULL);
1419 if (rc != 0)
1420 return rc;
1421
1422 ts->tv_sec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_SECONDS);
1423 ts->tv_nsec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_NANOSECONDS);
1424 return 0;
1425}
1426
1427static int efx_phc_settime(struct ptp_clock_info *ptp,
1428 const struct timespec *e_ts)
1429{
1430 /* Get the current NIC time, efx_phc_gettime.
1431 * Subtract from the desired time to get the offset
1432 * call efx_phc_adjtime with the offset
1433 */
1434 int rc;
1435 struct timespec time_now;
1436 struct timespec delta;
1437
1438 rc = efx_phc_gettime(ptp, &time_now);
1439 if (rc != 0)
1440 return rc;
1441
1442 delta = timespec_sub(*e_ts, time_now);
1443
1444 efx_phc_adjtime(ptp, timespec_to_ns(&delta));
1445 if (rc != 0)
1446 return rc;
1447
1448 return 0;
1449}
1450
1451static int efx_phc_enable(struct ptp_clock_info *ptp,
1452 struct ptp_clock_request *request,
1453 int enable)
1454{
1455 struct efx_ptp_data *ptp_data = container_of(ptp,
1456 struct efx_ptp_data,
1457 phc_clock_info);
1458 if (request->type != PTP_CLK_REQ_PPS)
1459 return -EOPNOTSUPP;
1460
1461 ptp_data->nic_ts_enabled = !!enable;
1462 return 0;
1463}
1464
1465static const struct efx_channel_type efx_ptp_channel_type = {
1466 .handle_no_channel = efx_ptp_handle_no_channel,
1467 .pre_probe = efx_ptp_probe_channel,
1468 .post_remove = efx_ptp_remove_channel,
1469 .get_name = efx_ptp_get_channel_name,
1470 /* no copy operation; there is no need to reallocate this channel */
1471 .receive_skb = efx_ptp_rx,
1472 .keep_eventq = false,
1473};
1474
1475void efx_ptp_probe(struct efx_nic *efx)
1476{
1477 /* Check whether PTP is implemented on this NIC. The DISABLE
1478 * operation will succeed if and only if it is implemented.
1479 */
1480 if (efx_ptp_disable(efx) == 0)
1481 efx->extra_channel_type[EFX_EXTRA_CHANNEL_PTP] =
1482 &efx_ptp_channel_type;
1483}
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 6bafd216e55e..84b41bf08a38 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -335,6 +335,7 @@ static int siena_probe_nic(struct efx_nic *efx)
335 goto fail5; 335 goto fail5;
336 336
337 efx_sriov_probe(efx); 337 efx_sriov_probe(efx);
338 efx_ptp_probe(efx);
338 339
339 return 0; 340 return 0;
340 341
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index ebca75ed78dc..5e090e54298e 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -339,6 +339,12 @@ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
339 339
340 EFX_WARN_ON_PARANOID(!netif_device_present(net_dev)); 340 EFX_WARN_ON_PARANOID(!netif_device_present(net_dev));
341 341
342 /* PTP "event" packet */
343 if (unlikely(efx_xmit_with_hwtstamp(skb)) &&
344 unlikely(efx_ptp_is_ptp_tx(efx, skb))) {
345 return efx_ptp_tx(efx, skb);
346 }
347
342 index = skb_get_queue_mapping(skb); 348 index = skb_get_queue_mapping(skb);
343 type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OFFLOAD : 0; 349 type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OFFLOAD : 0;
344 if (index >= efx->n_tx_channels) { 350 if (index >= efx->n_tx_channels) {
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-21 10:33:27 -0400