summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/mscc/ocelot_ptp.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/ethernet/mscc/ocelot_ptp.c')
-rw-r--r--drivers/net/ethernet/mscc/ocelot_ptp.c858
1 files changed, 858 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot_ptp.c b/drivers/net/ethernet/mscc/ocelot_ptp.c
new file mode 100644
index 000000000..cb32234a5
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_ptp.c
@@ -0,0 +1,858 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Microsemi Ocelot PTP clock driver
+ *
+ * Copyright (c) 2017 Microsemi Corporation
+ * Copyright 2020 NXP
+ */
+#include <linux/time64.h>
+
+#include <linux/dsa/ocelot.h>
+#include <linux/ptp_classify.h>
+#include <soc/mscc/ocelot_ptp.h>
+#include <soc/mscc/ocelot_sys.h>
+#include <soc/mscc/ocelot_vcap.h>
+#include <soc/mscc/ocelot.h>
+#include "ocelot.h"
+
+int ocelot_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts)
+{
+ struct ocelot *ocelot = container_of(ptp, struct ocelot, ptp_info);
+ unsigned long flags;
+ time64_t s;
+ u32 val;
+ s64 ns;
+
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+
+ val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);
+ val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK | PTP_PIN_CFG_DOM);
+ val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_SAVE);
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
+
+ s = ocelot_read_rix(ocelot, PTP_PIN_TOD_SEC_MSB, TOD_ACC_PIN) & 0xffff;
+ s <<= 32;
+ s += ocelot_read_rix(ocelot, PTP_PIN_TOD_SEC_LSB, TOD_ACC_PIN);
+ ns = ocelot_read_rix(ocelot, PTP_PIN_TOD_NSEC, TOD_ACC_PIN);
+
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+
+ /* Deal with negative values */
+ if (ns >= 0x3ffffff0 && ns <= 0x3fffffff) {
+ s--;
+ ns &= 0xf;
+ ns += 999999984;
+ }
+
+ set_normalized_timespec64(ts, s, ns);
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_ptp_gettime64);
+
+int ocelot_ptp_settime64(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ struct ocelot *ocelot = container_of(ptp, struct ocelot, ptp_info);
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+
+ val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);
+ val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK | PTP_PIN_CFG_DOM);
+ val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_IDLE);
+
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
+
+ ocelot_write_rix(ocelot, lower_32_bits(ts->tv_sec), PTP_PIN_TOD_SEC_LSB,
+ TOD_ACC_PIN);
+ ocelot_write_rix(ocelot, upper_32_bits(ts->tv_sec), PTP_PIN_TOD_SEC_MSB,
+ TOD_ACC_PIN);
+ ocelot_write_rix(ocelot, ts->tv_nsec, PTP_PIN_TOD_NSEC, TOD_ACC_PIN);
+
+ val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);
+ val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK | PTP_PIN_CFG_DOM);
+ val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_LOAD);
+
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
+
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+
+ if (ocelot->ops->tas_clock_adjust)
+ ocelot->ops->tas_clock_adjust(ocelot);
+
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_ptp_settime64);
+
+int ocelot_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ if (delta > -(NSEC_PER_SEC / 2) && delta < (NSEC_PER_SEC / 2)) {
+ struct ocelot *ocelot = container_of(ptp, struct ocelot,
+ ptp_info);
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+
+ val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);
+ val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK |
+ PTP_PIN_CFG_DOM);
+ val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_IDLE);
+
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
+
+ ocelot_write_rix(ocelot, 0, PTP_PIN_TOD_SEC_LSB, TOD_ACC_PIN);
+ ocelot_write_rix(ocelot, 0, PTP_PIN_TOD_SEC_MSB, TOD_ACC_PIN);
+ ocelot_write_rix(ocelot, delta, PTP_PIN_TOD_NSEC, TOD_ACC_PIN);
+
+ val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);
+ val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK |
+ PTP_PIN_CFG_DOM);
+ val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_DELTA);
+
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
+
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+
+ if (ocelot->ops->tas_clock_adjust)
+ ocelot->ops->tas_clock_adjust(ocelot);
+ } else {
+ /* Fall back using ocelot_ptp_settime64 which is not exact. */
+ struct timespec64 ts;
+ u64 now;
+
+ ocelot_ptp_gettime64(ptp, &ts);
+
+ now = ktime_to_ns(timespec64_to_ktime(ts));
+ ts = ns_to_timespec64(now + delta);
+
+ ocelot_ptp_settime64(ptp, &ts);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_ptp_adjtime);
+
+int ocelot_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+ struct ocelot *ocelot = container_of(ptp, struct ocelot, ptp_info);
+ u32 unit = 0, direction = 0;
+ unsigned long flags;
+ u64 adj = 0;
+
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+
+ if (!scaled_ppm)
+ goto disable_adj;
+
+ if (scaled_ppm < 0) {
+ direction = PTP_CFG_CLK_ADJ_CFG_DIR;
+ scaled_ppm = -scaled_ppm;
+ }
+
+ adj = PSEC_PER_SEC << 16;
+ do_div(adj, scaled_ppm);
+ do_div(adj, 1000);
+
+ /* If the adjustment value is too large, use ns instead */
+ if (adj >= (1L << 30)) {
+ unit = PTP_CFG_CLK_ADJ_FREQ_NS;
+ do_div(adj, 1000);
+ }
+
+ /* Still too big */
+ if (adj >= (1L << 30))
+ goto disable_adj;
+
+ ocelot_write(ocelot, unit | adj, PTP_CLK_CFG_ADJ_FREQ);
+ ocelot_write(ocelot, PTP_CFG_CLK_ADJ_CFG_ENA | direction,
+ PTP_CLK_CFG_ADJ_CFG);
+
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+ return 0;
+
+disable_adj:
+ ocelot_write(ocelot, 0, PTP_CLK_CFG_ADJ_CFG);
+
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_ptp_adjfine);
+
+int ocelot_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
+ enum ptp_pin_function func, unsigned int chan)
+{
+ switch (func) {
+ case PTP_PF_NONE:
+ case PTP_PF_PEROUT:
+ break;
+ case PTP_PF_EXTTS:
+ case PTP_PF_PHYSYNC:
+ return -1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_ptp_verify);
+
+int ocelot_ptp_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *rq, int on)
+{
+ struct ocelot *ocelot = container_of(ptp, struct ocelot, ptp_info);
+ struct timespec64 ts_phase, ts_period;
+ enum ocelot_ptp_pins ptp_pin;
+ unsigned long flags;
+ bool pps = false;
+ int pin = -1;
+ s64 wf_high;
+ s64 wf_low;
+ u32 val;
+
+ switch (rq->type) {
+ case PTP_CLK_REQ_PEROUT:
+ /* Reject requests with unsupported flags */
+ if (rq->perout.flags & ~(PTP_PEROUT_DUTY_CYCLE |
+ PTP_PEROUT_PHASE))
+ return -EOPNOTSUPP;
+
+ pin = ptp_find_pin(ocelot->ptp_clock, PTP_PF_PEROUT,
+ rq->perout.index);
+ if (pin == 0)
+ ptp_pin = PTP_PIN_0;
+ else if (pin == 1)
+ ptp_pin = PTP_PIN_1;
+ else if (pin == 2)
+ ptp_pin = PTP_PIN_2;
+ else if (pin == 3)
+ ptp_pin = PTP_PIN_3;
+ else
+ return -EBUSY;
+
+ ts_period.tv_sec = rq->perout.period.sec;
+ ts_period.tv_nsec = rq->perout.period.nsec;
+
+ if (ts_period.tv_sec == 1 && ts_period.tv_nsec == 0)
+ pps = true;
+
+ /* Handle turning off */
+ if (!on) {
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+ val = PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_IDLE);
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, ptp_pin);
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+ break;
+ }
+
+ if (rq->perout.flags & PTP_PEROUT_PHASE) {
+ ts_phase.tv_sec = rq->perout.phase.sec;
+ ts_phase.tv_nsec = rq->perout.phase.nsec;
+ } else {
+ /* Compatibility */
+ ts_phase.tv_sec = rq->perout.start.sec;
+ ts_phase.tv_nsec = rq->perout.start.nsec;
+ }
+ if (ts_phase.tv_sec || (ts_phase.tv_nsec && !pps)) {
+ dev_warn(ocelot->dev,
+ "Absolute start time not supported!\n");
+ dev_warn(ocelot->dev,
+ "Accept nsec for PPS phase adjustment, otherwise start time should be 0 0.\n");
+ return -EINVAL;
+ }
+
+ /* Calculate waveform high and low times */
+ if (rq->perout.flags & PTP_PEROUT_DUTY_CYCLE) {
+ struct timespec64 ts_on;
+
+ ts_on.tv_sec = rq->perout.on.sec;
+ ts_on.tv_nsec = rq->perout.on.nsec;
+
+ wf_high = timespec64_to_ns(&ts_on);
+ } else {
+ if (pps) {
+ wf_high = 1000;
+ } else {
+ wf_high = timespec64_to_ns(&ts_period);
+ wf_high = div_s64(wf_high, 2);
+ }
+ }
+
+ wf_low = timespec64_to_ns(&ts_period);
+ wf_low -= wf_high;
+
+ /* Handle PPS request */
+ if (pps) {
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+ ocelot_write_rix(ocelot, ts_phase.tv_nsec,
+ PTP_PIN_WF_LOW_PERIOD, ptp_pin);
+ ocelot_write_rix(ocelot, wf_high,
+ PTP_PIN_WF_HIGH_PERIOD, ptp_pin);
+ val = PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_CLOCK);
+ val |= PTP_PIN_CFG_SYNC;
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, ptp_pin);
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+ break;
+ }
+
+ /* Handle periodic clock */
+ if (wf_high > 0x3fffffff || wf_high <= 0x6)
+ return -EINVAL;
+ if (wf_low > 0x3fffffff || wf_low <= 0x6)
+ return -EINVAL;
+
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+ ocelot_write_rix(ocelot, wf_low, PTP_PIN_WF_LOW_PERIOD,
+ ptp_pin);
+ ocelot_write_rix(ocelot, wf_high, PTP_PIN_WF_HIGH_PERIOD,
+ ptp_pin);
+ val = PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_CLOCK);
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, ptp_pin);
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_ptp_enable);
+
+static void ocelot_populate_l2_ptp_trap_key(struct ocelot_vcap_filter *trap)
+{
+ trap->key_type = OCELOT_VCAP_KEY_ETYPE;
+ *(__be16 *)trap->key.etype.etype.value = htons(ETH_P_1588);
+ *(__be16 *)trap->key.etype.etype.mask = htons(0xffff);
+}
+
+static void
+ocelot_populate_ipv4_ptp_event_trap_key(struct ocelot_vcap_filter *trap)
+{
+ trap->key_type = OCELOT_VCAP_KEY_IPV4;
+ trap->key.ipv4.proto.value[0] = IPPROTO_UDP;
+ trap->key.ipv4.proto.mask[0] = 0xff;
+ trap->key.ipv4.dport.value = PTP_EV_PORT;
+ trap->key.ipv4.dport.mask = 0xffff;
+}
+
+static void
+ocelot_populate_ipv6_ptp_event_trap_key(struct ocelot_vcap_filter *trap)
+{
+ trap->key_type = OCELOT_VCAP_KEY_IPV6;
+ trap->key.ipv6.proto.value[0] = IPPROTO_UDP;
+ trap->key.ipv6.proto.mask[0] = 0xff;
+ trap->key.ipv6.dport.value = PTP_EV_PORT;
+ trap->key.ipv6.dport.mask = 0xffff;
+}
+
+static void
+ocelot_populate_ipv4_ptp_general_trap_key(struct ocelot_vcap_filter *trap)
+{
+ trap->key_type = OCELOT_VCAP_KEY_IPV4;
+ trap->key.ipv4.proto.value[0] = IPPROTO_UDP;
+ trap->key.ipv4.proto.mask[0] = 0xff;
+ trap->key.ipv4.dport.value = PTP_GEN_PORT;
+ trap->key.ipv4.dport.mask = 0xffff;
+}
+
+static void
+ocelot_populate_ipv6_ptp_general_trap_key(struct ocelot_vcap_filter *trap)
+{
+ trap->key_type = OCELOT_VCAP_KEY_IPV6;
+ trap->key.ipv6.proto.value[0] = IPPROTO_UDP;
+ trap->key.ipv6.proto.mask[0] = 0xff;
+ trap->key.ipv6.dport.value = PTP_GEN_PORT;
+ trap->key.ipv6.dport.mask = 0xffff;
+}
+
+static int ocelot_l2_ptp_trap_add(struct ocelot *ocelot, int port)
+{
+ unsigned long l2_cookie = OCELOT_VCAP_IS2_L2_PTP_TRAP(ocelot);
+
+ return ocelot_trap_add(ocelot, port, l2_cookie, true,
+ ocelot_populate_l2_ptp_trap_key);
+}
+
+static int ocelot_l2_ptp_trap_del(struct ocelot *ocelot, int port)
+{
+ unsigned long l2_cookie = OCELOT_VCAP_IS2_L2_PTP_TRAP(ocelot);
+
+ return ocelot_trap_del(ocelot, port, l2_cookie);
+}
+
+static int ocelot_ipv4_ptp_trap_add(struct ocelot *ocelot, int port)
+{
+ unsigned long ipv4_gen_cookie = OCELOT_VCAP_IS2_IPV4_GEN_PTP_TRAP(ocelot);
+ unsigned long ipv4_ev_cookie = OCELOT_VCAP_IS2_IPV4_EV_PTP_TRAP(ocelot);
+ int err;
+
+ err = ocelot_trap_add(ocelot, port, ipv4_ev_cookie, true,
+ ocelot_populate_ipv4_ptp_event_trap_key);
+ if (err)
+ return err;
+
+ err = ocelot_trap_add(ocelot, port, ipv4_gen_cookie, false,
+ ocelot_populate_ipv4_ptp_general_trap_key);
+ if (err)
+ ocelot_trap_del(ocelot, port, ipv4_ev_cookie);
+
+ return err;
+}
+
+static int ocelot_ipv4_ptp_trap_del(struct ocelot *ocelot, int port)
+{
+ unsigned long ipv4_gen_cookie = OCELOT_VCAP_IS2_IPV4_GEN_PTP_TRAP(ocelot);
+ unsigned long ipv4_ev_cookie = OCELOT_VCAP_IS2_IPV4_EV_PTP_TRAP(ocelot);
+ int err;
+
+ err = ocelot_trap_del(ocelot, port, ipv4_ev_cookie);
+ err |= ocelot_trap_del(ocelot, port, ipv4_gen_cookie);
+ return err;
+}
+
+static int ocelot_ipv6_ptp_trap_add(struct ocelot *ocelot, int port)
+{
+ unsigned long ipv6_gen_cookie = OCELOT_VCAP_IS2_IPV6_GEN_PTP_TRAP(ocelot);
+ unsigned long ipv6_ev_cookie = OCELOT_VCAP_IS2_IPV6_EV_PTP_TRAP(ocelot);
+ int err;
+
+ err = ocelot_trap_add(ocelot, port, ipv6_ev_cookie, true,
+ ocelot_populate_ipv6_ptp_event_trap_key);
+ if (err)
+ return err;
+
+ err = ocelot_trap_add(ocelot, port, ipv6_gen_cookie, false,
+ ocelot_populate_ipv6_ptp_general_trap_key);
+ if (err)
+ ocelot_trap_del(ocelot, port, ipv6_ev_cookie);
+
+ return err;
+}
+
+static int ocelot_ipv6_ptp_trap_del(struct ocelot *ocelot, int port)
+{
+ unsigned long ipv6_gen_cookie = OCELOT_VCAP_IS2_IPV6_GEN_PTP_TRAP(ocelot);
+ unsigned long ipv6_ev_cookie = OCELOT_VCAP_IS2_IPV6_EV_PTP_TRAP(ocelot);
+ int err;
+
+ err = ocelot_trap_del(ocelot, port, ipv6_ev_cookie);
+ err |= ocelot_trap_del(ocelot, port, ipv6_gen_cookie);
+ return err;
+}
+
+static int ocelot_setup_ptp_traps(struct ocelot *ocelot, int port,
+ bool l2, bool l4)
+{
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
+ int err;
+
+ ocelot_port->trap_proto &= ~(OCELOT_PROTO_PTP_L2 |
+ OCELOT_PROTO_PTP_L4);
+
+ if (l2)
+ err = ocelot_l2_ptp_trap_add(ocelot, port);
+ else
+ err = ocelot_l2_ptp_trap_del(ocelot, port);
+ if (err)
+ return err;
+
+ if (l4) {
+ err = ocelot_ipv4_ptp_trap_add(ocelot, port);
+ if (err)
+ goto err_ipv4;
+
+ err = ocelot_ipv6_ptp_trap_add(ocelot, port);
+ if (err)
+ goto err_ipv6;
+ } else {
+ err = ocelot_ipv4_ptp_trap_del(ocelot, port);
+
+ err |= ocelot_ipv6_ptp_trap_del(ocelot, port);
+ }
+ if (err)
+ return err;
+
+ if (l2)
+ ocelot_port->trap_proto |= OCELOT_PROTO_PTP_L2;
+ if (l4)
+ ocelot_port->trap_proto |= OCELOT_PROTO_PTP_L4;
+
+ return 0;
+
+err_ipv6:
+ ocelot_ipv4_ptp_trap_del(ocelot, port);
+err_ipv4:
+ if (l2)
+ ocelot_l2_ptp_trap_del(ocelot, port);
+ return err;
+}
+
+static int ocelot_traps_to_ptp_rx_filter(unsigned int proto)
+{
+ if ((proto & OCELOT_PROTO_PTP_L2) && (proto & OCELOT_PROTO_PTP_L4))
+ return HWTSTAMP_FILTER_PTP_V2_EVENT;
+ else if (proto & OCELOT_PROTO_PTP_L2)
+ return HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+ else if (proto & OCELOT_PROTO_PTP_L4)
+ return HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
+
+ return HWTSTAMP_FILTER_NONE;
+}
+
+int ocelot_hwstamp_get(struct ocelot *ocelot, int port, struct ifreq *ifr)
+{
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
+ struct hwtstamp_config cfg = {};
+
+ switch (ocelot_port->ptp_cmd) {
+ case IFH_REW_OP_TWO_STEP_PTP:
+ cfg.tx_type = HWTSTAMP_TX_ON;
+ break;
+ case IFH_REW_OP_ORIGIN_PTP:
+ cfg.tx_type = HWTSTAMP_TX_ONESTEP_SYNC;
+ break;
+ default:
+ cfg.tx_type = HWTSTAMP_TX_OFF;
+ break;
+ }
+
+ cfg.rx_filter = ocelot_traps_to_ptp_rx_filter(ocelot_port->trap_proto);
+
+ return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+EXPORT_SYMBOL(ocelot_hwstamp_get);
+
+int ocelot_hwstamp_set(struct ocelot *ocelot, int port, struct ifreq *ifr)
+{
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
+ bool l2 = false, l4 = false;
+ struct hwtstamp_config cfg;
+ int err;
+
+ if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+ return -EFAULT;
+
+ /* Tx type sanity check */
+ switch (cfg.tx_type) {
+ case HWTSTAMP_TX_ON:
+ ocelot_port->ptp_cmd = IFH_REW_OP_TWO_STEP_PTP;
+ break;
+ case HWTSTAMP_TX_ONESTEP_SYNC:
+ /* IFH_REW_OP_ONE_STEP_PTP updates the correctional field, we
+ * need to update the origin time.
+ */
+ ocelot_port->ptp_cmd = IFH_REW_OP_ORIGIN_PTP;
+ break;
+ case HWTSTAMP_TX_OFF:
+ ocelot_port->ptp_cmd = 0;
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ switch (cfg.rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+ l4 = true;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+ l2 = true;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+ l2 = true;
+ l4 = true;
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ err = ocelot_setup_ptp_traps(ocelot, port, l2, l4);
+ if (err)
+ return err;
+
+ cfg.rx_filter = ocelot_traps_to_ptp_rx_filter(ocelot_port->trap_proto);
+
+ return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+EXPORT_SYMBOL(ocelot_hwstamp_set);
+
+int ocelot_get_ts_info(struct ocelot *ocelot, int port,
+ struct ethtool_ts_info *info)
+{
+ info->phc_index = ocelot->ptp_clock ?
+ ptp_clock_index(ocelot->ptp_clock) : -1;
+ if (info->phc_index == -1) {
+ info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
+ SOF_TIMESTAMPING_RX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE;
+ return 0;
+ }
+ info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
+ SOF_TIMESTAMPING_RX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE |
+ SOF_TIMESTAMPING_TX_HARDWARE |
+ SOF_TIMESTAMPING_RX_HARDWARE |
+ SOF_TIMESTAMPING_RAW_HARDWARE;
+ info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON) |
+ BIT(HWTSTAMP_TX_ONESTEP_SYNC);
+ info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
+ BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) |
+ BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
+ BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT);
+
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_get_ts_info);
+
+static int ocelot_port_add_txtstamp_skb(struct ocelot *ocelot, int port,
+ struct sk_buff *clone)
+{
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
+ unsigned long flags;
+
+ spin_lock_irqsave(&ocelot->ts_id_lock, flags);
+
+ if (ocelot_port->ptp_skbs_in_flight == OCELOT_MAX_PTP_ID ||
+ ocelot->ptp_skbs_in_flight == OCELOT_PTP_FIFO_SIZE) {
+ spin_unlock_irqrestore(&ocelot->ts_id_lock, flags);
+ return -EBUSY;
+ }
+
+ skb_shinfo(clone)->tx_flags |= SKBTX_IN_PROGRESS;
+ /* Store timestamp ID in OCELOT_SKB_CB(clone)->ts_id */
+ OCELOT_SKB_CB(clone)->ts_id = ocelot_port->ts_id;
+
+ ocelot_port->ts_id++;
+ if (ocelot_port->ts_id == OCELOT_MAX_PTP_ID)
+ ocelot_port->ts_id = 0;
+
+ ocelot_port->ptp_skbs_in_flight++;
+ ocelot->ptp_skbs_in_flight++;
+
+ skb_queue_tail(&ocelot_port->tx_skbs, clone);
+
+ spin_unlock_irqrestore(&ocelot->ts_id_lock, flags);
+
+ return 0;
+}
+
+static bool ocelot_ptp_is_onestep_sync(struct sk_buff *skb,
+ unsigned int ptp_class)
+{
+ struct ptp_header *hdr;
+ u8 msgtype, twostep;
+
+ hdr = ptp_parse_header(skb, ptp_class);
+ if (!hdr)
+ return false;
+
+ msgtype = ptp_get_msgtype(hdr, ptp_class);
+ twostep = hdr->flag_field[0] & 0x2;
+
+ if (msgtype == PTP_MSGTYPE_SYNC && twostep == 0)
+ return true;
+
+ return false;
+}
+
+int ocelot_port_txtstamp_request(struct ocelot *ocelot, int port,
+ struct sk_buff *skb,
+ struct sk_buff **clone)
+{
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
+ u8 ptp_cmd = ocelot_port->ptp_cmd;
+ unsigned int ptp_class;
+ int err;
+
+ /* Don't do anything if PTP timestamping not enabled */
+ if (!ptp_cmd)
+ return 0;
+
+ ptp_class = ptp_classify_raw(skb);
+ if (ptp_class == PTP_CLASS_NONE)
+ return -EINVAL;
+
+ /* Store ptp_cmd in OCELOT_SKB_CB(skb)->ptp_cmd */
+ if (ptp_cmd == IFH_REW_OP_ORIGIN_PTP) {
+ if (ocelot_ptp_is_onestep_sync(skb, ptp_class)) {
+ OCELOT_SKB_CB(skb)->ptp_cmd = ptp_cmd;
+ return 0;
+ }
+
+ /* Fall back to two-step timestamping */
+ ptp_cmd = IFH_REW_OP_TWO_STEP_PTP;
+ }
+
+ if (ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) {
+ *clone = skb_clone_sk(skb);
+ if (!(*clone))
+ return -ENOMEM;
+
+ err = ocelot_port_add_txtstamp_skb(ocelot, port, *clone);
+ if (err)
+ return err;
+
+ OCELOT_SKB_CB(skb)->ptp_cmd = ptp_cmd;
+ OCELOT_SKB_CB(*clone)->ptp_class = ptp_class;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_port_txtstamp_request);
+
+static void ocelot_get_hwtimestamp(struct ocelot *ocelot,
+ struct timespec64 *ts)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&ocelot->ptp_clock_lock, flags);
+
+ /* Read current PTP time to get seconds */
+ val = ocelot_read_rix(ocelot, PTP_PIN_CFG, TOD_ACC_PIN);
+
+ val &= ~(PTP_PIN_CFG_SYNC | PTP_PIN_CFG_ACTION_MASK | PTP_PIN_CFG_DOM);
+ val |= PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_SAVE);
+ ocelot_write_rix(ocelot, val, PTP_PIN_CFG, TOD_ACC_PIN);
+ ts->tv_sec = ocelot_read_rix(ocelot, PTP_PIN_TOD_SEC_LSB, TOD_ACC_PIN);
+
+ /* Read packet HW timestamp from FIFO */
+ val = ocelot_read(ocelot, SYS_PTP_TXSTAMP);
+ ts->tv_nsec = SYS_PTP_TXSTAMP_PTP_TXSTAMP(val);
+
+ /* Sec has incremented since the ts was registered */
+ if ((ts->tv_sec & 0x1) != !!(val & SYS_PTP_TXSTAMP_PTP_TXSTAMP_SEC))
+ ts->tv_sec--;
+
+ spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags);
+}
+
+static bool ocelot_validate_ptp_skb(struct sk_buff *clone, u16 seqid)
+{
+ struct ptp_header *hdr;
+
+ hdr = ptp_parse_header(clone, OCELOT_SKB_CB(clone)->ptp_class);
+ if (WARN_ON(!hdr))
+ return false;
+
+ return seqid == ntohs(hdr->sequence_id);
+}
+
+void ocelot_get_txtstamp(struct ocelot *ocelot)
+{
+ int budget = OCELOT_PTP_QUEUE_SZ;
+
+ while (budget--) {
+ struct sk_buff *skb, *skb_tmp, *skb_match = NULL;
+ struct skb_shared_hwtstamps shhwtstamps;
+ u32 val, id, seqid, txport;
+ struct ocelot_port *port;
+ struct timespec64 ts;
+ unsigned long flags;
+
+ val = ocelot_read(ocelot, SYS_PTP_STATUS);
+
+ /* Check if a timestamp can be retrieved */
+ if (!(val & SYS_PTP_STATUS_PTP_MESS_VLD))
+ break;
+
+ WARN_ON(val & SYS_PTP_STATUS_PTP_OVFL);
+
+ /* Retrieve the ts ID and Tx port */
+ id = SYS_PTP_STATUS_PTP_MESS_ID_X(val);
+ txport = SYS_PTP_STATUS_PTP_MESS_TXPORT_X(val);
+ seqid = SYS_PTP_STATUS_PTP_MESS_SEQ_ID(val);
+
+ port = ocelot->ports[txport];
+
+ spin_lock(&ocelot->ts_id_lock);
+ port->ptp_skbs_in_flight--;
+ ocelot->ptp_skbs_in_flight--;
+ spin_unlock(&ocelot->ts_id_lock);
+
+ /* Retrieve its associated skb */
+try_again:
+ spin_lock_irqsave(&port->tx_skbs.lock, flags);
+
+ skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) {
+ if (OCELOT_SKB_CB(skb)->ts_id != id)
+ continue;
+ __skb_unlink(skb, &port->tx_skbs);
+ skb_match = skb;
+ break;
+ }
+
+ spin_unlock_irqrestore(&port->tx_skbs.lock, flags);
+
+ if (WARN_ON(!skb_match))
+ continue;
+
+ if (!ocelot_validate_ptp_skb(skb_match, seqid)) {
+ dev_err_ratelimited(ocelot->dev,
+ "port %d received stale TX timestamp for seqid %d, discarding\n",
+ txport, seqid);
+ dev_kfree_skb_any(skb);
+ goto try_again;
+ }
+
+ /* Get the h/w timestamp */
+ ocelot_get_hwtimestamp(ocelot, &ts);
+
+ /* Set the timestamp into the skb */
+ memset(&shhwtstamps, 0, sizeof(shhwtstamps));
+ shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec);
+ skb_complete_tx_timestamp(skb_match, &shhwtstamps);
+
+ /* Next ts */
+ ocelot_write(ocelot, SYS_PTP_NXT_PTP_NXT, SYS_PTP_NXT);
+ }
+}
+EXPORT_SYMBOL(ocelot_get_txtstamp);
+
+int ocelot_init_timestamp(struct ocelot *ocelot,
+ const struct ptp_clock_info *info)
+{
+ struct ptp_clock *ptp_clock;
+ int i;
+
+ ocelot->ptp_info = *info;
+
+ for (i = 0; i < OCELOT_PTP_PINS_NUM; i++) {
+ struct ptp_pin_desc *p = &ocelot->ptp_pins[i];
+
+ snprintf(p->name, sizeof(p->name), "switch_1588_dat%d", i);
+ p->index = i;
+ p->func = PTP_PF_NONE;
+ }
+
+ ocelot->ptp_info.pin_config = &ocelot->ptp_pins[0];
+
+ ptp_clock = ptp_clock_register(&ocelot->ptp_info, ocelot->dev);
+ if (IS_ERR(ptp_clock))
+ return PTR_ERR(ptp_clock);
+ /* Check if PHC support is missing at the configuration level */
+ if (!ptp_clock)
+ return 0;
+
+ ocelot->ptp_clock = ptp_clock;
+
+ ocelot_write(ocelot, SYS_PTP_CFG_PTP_STAMP_WID(30), SYS_PTP_CFG);
+ ocelot_write(ocelot, 0xffffffff, ANA_TABLES_PTP_ID_LOW);
+ ocelot_write(ocelot, 0xffffffff, ANA_TABLES_PTP_ID_HIGH);
+
+ ocelot_write(ocelot, PTP_CFG_MISC_PTP_EN, PTP_CFG_MISC);
+
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_init_timestamp);
+
+int ocelot_deinit_timestamp(struct ocelot *ocelot)
+{
+ if (ocelot->ptp_clock)
+ ptp_clock_unregister(ocelot->ptp_clock);
+ return 0;
+}
+EXPORT_SYMBOL(ocelot_deinit_timestamp);
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 16:40:32 +0000