// SPDX-License-Identifier: GPL-2.0+
#include <linux/ptp_classify.h>
#include "lan966x_main.h"
#include "vcap_api.h"
#include "vcap_api_client.h"
#define LAN966X_MAX_PTP_ID 512
/* Represents 1ppm adjustment in 2^59 format with 6.037735849ns as reference
* The value is calculated as following: (1/1000000)/((2^-59)/6.037735849)
*/
#define LAN966X_1PPM_FORMAT 3480517749723LL
/* Represents 1ppb adjustment in 2^29 format with 6.037735849ns as reference
* The value is calculated as following: (1/1000000000)/((2^59)/6.037735849)
*/
#define LAN966X_1PPB_FORMAT 3480517749LL
#define TOD_ACC_PIN 0x7
/* This represents the base rule ID for the PTP rules that are added in the
* VCAP to trap frames to CPU. This number needs to be bigger than the maximum
* number of entries that can exist in the VCAP.
*/
#define LAN966X_VCAP_PTP_RULE_ID 1000000
#define LAN966X_VCAP_L2_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 0)
#define LAN966X_VCAP_IPV4_EV_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 1)
#define LAN966X_VCAP_IPV4_GEN_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 2)
#define LAN966X_VCAP_IPV6_EV_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 3)
#define LAN966X_VCAP_IPV6_GEN_PTP_TRAP (LAN966X_VCAP_PTP_RULE_ID + 4)
enum {
PTP_PIN_ACTION_IDLE = 0,
PTP_PIN_ACTION_LOAD,
PTP_PIN_ACTION_SAVE,
PTP_PIN_ACTION_CLOCK,
PTP_PIN_ACTION_DELTA,
PTP_PIN_ACTION_TOD
};
static u64 lan966x_ptp_get_nominal_value(void)
{
/* This is the default value that for each system clock, the time of day
* is increased. It has the format 5.59 nanosecond.
*/
return 0x304d4873ecade305;
}
static int lan966x_ptp_add_trap(struct lan966x_port *port,
int (*add_ptp_key)(struct vcap_rule *vrule,
struct lan966x_port*),
u32 rule_id,
u16 proto)
{
struct lan966x *lan966x = port->lan966x;
struct vcap_rule *vrule;
int err;
vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id);
if (!IS_ERR(vrule)) {
u32 value, mask;
/* Just modify the ingress port mask and exit */
vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK,
&value, &mask);
mask &= ~BIT(port->chip_port);
vcap_rule_mod_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK,
value, mask);
err = vcap_mod_rule(vrule);
goto free_rule;
}
vrule = vcap_alloc_rule(lan966x->vcap_ctrl, port->dev,
LAN966X_VCAP_CID_IS2_L0,
VCAP_USER_PTP, 0, rule_id);
if (IS_ERR(vrule))
return PTR_ERR(vrule);
err = add_ptp_key(vrule, port);
if (err)
goto free_rule;
err = vcap_rule_add_action_bit(vrule, VCAP_AF_CPU_COPY_ENA, VCAP_BIT_1);
err |= vcap_rule_add_action_u32(vrule, VCAP_AF_MASK_MODE, LAN966X_PMM_REPLACE);
err |= vcap_val_rule(vrule, proto);
if (err)
goto free_rule;
err = vcap_add_rule(vrule);
free_rule:
/* Free the local copy of the rule */
vcap_free_rule(vrule);
return err;
}
static int lan966x_ptp_del_trap(struct lan966x_port *port,
u32 rule_id)
{
struct lan966x *lan966x = port->lan966x;
struct vcap_rule *vrule;
u32 value, mask;
int err;
vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id);
if (IS_ERR(vrule))
return -EEXIST;
vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, &value, &mask);
mask |= BIT(port->chip_port);
/* No other port requires this trap, so it is safe to remove it */
if (mask == GENMASK(lan966x->num_phys_ports, 0)) {
err = vcap_del_rule(lan966x->vcap_ctrl, port->dev, rule_id);
goto free_rule;
}
vcap_rule_mod_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, value, mask);
err = vcap_mod_rule(vrule);
free_rule:
vcap_free_rule(vrule);
return err;
}
static int lan966x_ptp_add_l2_key(struct vcap_rule *vrule,
struct lan966x_port *port)
{
return vcap_rule_add_key_u32(vrule, VCAP_KF_ETYPE, ETH_P_1588, ~0);
}
static int lan966x_ptp_add_ip_event_key(struct vcap_rule *vrule,
struct lan966x_port *port)
{
return vcap_rule_add_key_u32(vrule, VCAP_KF_L4_DPORT, PTP_EV_PORT, ~0) ||
vcap_rule_add_key_bit(vrule, VCAP_KF_TCP_IS, VCAP_BIT_0);
}
static int lan966x_ptp_add_ip_general_key(struct vcap_rule *vrule,
struct lan966x_port *port)
{
return vcap_rule_add_key_u32(vrule, VCAP_KF_L4_DPORT, PTP_GEN_PORT, ~0) ||
vcap_rule_add_key_bit(vrule, VCAP_KF_TCP_IS, VCAP_BIT_0);
}
static int lan966x_ptp_add_l2_rule(struct lan966x_port *port)
{
return lan966x_ptp_add_trap(port, lan966x_ptp_add_l2_key,
LAN966X_VCAP_L2_PTP_TRAP, ETH_P_ALL);
}
static int lan966x_ptp_add_ipv4_rules(struct lan966x_port *port)
{
int err;
err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_event_key,
LAN966X_VCAP_IPV4_EV_PTP_TRAP, ETH_P_IP);
if (err)
return err;
err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_general_key,
LAN966X_VCAP_IPV4_GEN_PTP_TRAP, ETH_P_IP);
if (err)
lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_EV_PTP_TRAP);
return err;
}
static int lan966x_ptp_add_ipv6_rules(struct lan966x_port *port)
{
int err;
err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_event_key,
LAN966X_VCAP_IPV6_EV_PTP_TRAP, ETH_P_IPV6);
if (err)
return err;
err = lan966x_ptp_add_trap(port, lan966x_ptp_add_ip_general_key,
LAN966X_VCAP_IPV6_GEN_PTP_TRAP, ETH_P_IPV6);
if (err)
lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_EV_PTP_TRAP);
return err;
}
static int lan966x_ptp_del_l2_rule(struct lan966x_port *port)
{
return lan966x_ptp_del_trap(port, LAN966X_VCAP_L2_PTP_TRAP);
}
static int lan966x_ptp_del_ipv4_rules(struct lan966x_port *port)
{
int err;
err = lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_EV_PTP_TRAP);
err |= lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV4_GEN_PTP_TRAP);
return err;
}
static int lan966x_ptp_del_ipv6_rules(struct lan966x_port *port)
{
int err;
err = lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_EV_PTP_TRAP);
err |= lan966x_ptp_del_trap(port, LAN966X_VCAP_IPV6_GEN_PTP_TRAP);
return err;
}
static int lan966x_ptp_add_traps(struct lan966x_port *port)
{
int err;
err = lan966x_ptp_add_l2_rule(port);
if (err)
goto err_l2;
err = lan966x_ptp_add_ipv4_rules(port);
if (err)
goto err_ipv4;
err = lan966x_ptp_add_ipv6_rules(port);
if (err)
goto err_ipv6;
return err;
err_ipv6:
lan966x_ptp_del_ipv4_rules(port);
err_ipv4:
lan966x_ptp_del_l2_rule(port);
err_l2:
return err;
}
int lan966x_ptp_del_traps(struct lan966x_port *port)
{
int err;
err = lan966x_ptp_del_l2_rule(port);
err |= lan966x_ptp_del_ipv4_rules(port);
err |= lan966x_ptp_del_ipv6_rules(port);
return err;
}
int lan966x_ptp_setup_traps(struct lan966x_port *port,
struct kernel_hwtstamp_config *cfg)
{
if (cfg->rx_filter == HWTSTAMP_FILTER_NONE)
return lan966x_ptp_del_traps(port);
else
return lan966x_ptp_add_traps(port);
}
int lan966x_ptp_hwtstamp_set(struct lan966x_port *port,
struct kernel_hwtstamp_config *cfg,
struct netlink_ext_ack *extack)
{
struct lan966x *lan966x = port->lan966x;
struct lan966x_phc *phc;
switch (cfg->tx_type) {
case HWTSTAMP_TX_ON:
port->ptp_tx_cmd = IFH_REW_OP_TWO_STEP_PTP;
break;
case HWTSTAMP_TX_ONESTEP_SYNC:
port->ptp_tx_cmd = IFH_REW_OP_ONE_STEP_PTP;
break;
case HWTSTAMP_TX_OFF:
port->ptp_tx_cmd = IFH_REW_OP_NOOP;
break;
default:
return -ERANGE;
}
switch (cfg->rx_filter) {
case HWTSTAMP_FILTER_NONE:
port->ptp_rx_cmd = false;
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
case HWTSTAMP_FILTER_NTP_ALL:
port->ptp_rx_cmd = true;
cfg->rx_filter = HWTSTAMP_FILTER_ALL;
break;
default:
return -ERANGE;
}
/* Commit back the result & save it */
mutex_lock(&lan966x->ptp_lock);
phc = &lan966x->phc[LAN966X_PHC_PORT];
phc->hwtstamp_config = *cfg;
mutex_unlock(&lan966x->ptp_lock);
return 0;
}
void lan966x_ptp_hwtstamp_get(struct lan966x_port *port,
struct kernel_hwtstamp_config *cfg)
{
struct lan966x *lan966x = port->lan966x;
struct lan966x_phc *phc;
phc = &lan966x->phc[LAN966X_PHC_PORT];
*cfg = phc->hwtstamp_config;
}
static int lan966x_ptp_classify(struct lan966x_port *port, struct sk_buff *skb)
{
struct ptp_header *header;
u8 msgtype;
int type;
if (port->ptp_tx_cmd == IFH_REW_OP_NOOP)
return IFH_REW_OP_NOOP;
type = ptp_classify_raw(skb);
if (type == PTP_CLASS_NONE)
return IFH_REW_OP_NOOP;
header = ptp_parse_header(skb, type);
if (!header)
return IFH_REW_OP_NOOP;
if (port->ptp_tx_cmd == IFH_REW_OP_TWO_STEP_PTP)
return IFH_REW_OP_TWO_STEP_PTP;
/* If it is sync and run 1 step then set the correct operation,
* otherwise run as 2 step
*/
msgtype = ptp_get_msgtype(header, type);
if ((msgtype & 0xf) == 0)
return IFH_REW_OP_ONE_STEP_PTP;
return IFH_REW_OP_TWO_STEP_PTP;
}
static void lan966x_ptp_txtstamp_old_release(struct lan966x_port *port)
{
struct sk_buff *skb, *skb_tmp;
unsigned long flags;
spin_lock_irqsave(&port->tx_skbs.lock, flags);
skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) {
if time_after(LAN966X_SKB_CB(skb)->jiffies + LAN966X_PTP_TIMEOUT,
jiffies)
break;
__skb_unlink(skb, &port->tx_skbs);
dev_kfree_skb_any(skb);
}
spin_unlock_irqrestore(&port->tx_skbs.lock, flags);
}
int lan966x_ptp_txtstamp_request(struct lan966x_port *port,
struct sk_buff *skb)
{
struct lan966x *lan966x = port->lan966x;
unsigned long flags;
u8 rew_op;
rew_op = lan966x_ptp_classify(port, skb);
LAN966X_SKB_CB(skb)->rew_op = rew_op;
if (rew_op != IFH_REW_OP_TWO_STEP_PTP)
return 0;
lan966x_ptp_txtstamp_old_release(port);
spin_lock_irqsave(&lan966x->ptp_ts_id_lock, flags);
if (lan966x->ptp_skbs == LAN966X_MAX_PTP_ID) {
spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags);
return -EBUSY;
}
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
skb_queue_tail(&port->tx_skbs, skb);
LAN966X_SKB_CB(skb)->ts_id = port->ts_id;
LAN966X_SKB_CB(skb)->jiffies = jiffies;
lan966x->ptp_skbs++;
port->ts_id++;
if (port->ts_id == LAN966X_MAX_PTP_ID)
port->ts_id = 0;
spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags);
return 0;
}
void lan966x_ptp_txtstamp_release(struct lan966x_port *port,
struct sk_buff *skb)
{
struct lan966x *lan966x = port->lan966x;
unsigned long flags;
spin_lock_irqsave(&lan966x->ptp_ts_id_lock, flags);
port->ts_id--;
lan966x->ptp_skbs--;
skb_unlink(skb, &port->tx_skbs);
spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags);
}
static void lan966x_get_hwtimestamp(struct lan966x *lan966x,
struct timespec64 *ts,
u32 nsec)
{
/* Read current PTP time to get seconds */
unsigned long flags;
u32 curr_nsec;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) |
PTP_PIN_CFG_PIN_DOM_SET(LAN966X_PHC_PORT) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(TOD_ACC_PIN));
ts->tv_sec = lan_rd(lan966x, PTP_TOD_SEC_LSB(TOD_ACC_PIN));
curr_nsec = lan_rd(lan966x, PTP_TOD_NSEC(TOD_ACC_PIN));
ts->tv_nsec = nsec;
/* Sec has incremented since the ts was registered */
if (curr_nsec < nsec)
ts->tv_sec--;
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
}
irqreturn_t lan966x_ptp_irq_handler(int irq, void *args)
{
int budget = LAN966X_MAX_PTP_ID;
struct lan966x *lan966x = args;
while (budget--) {
struct sk_buff *skb, *skb_tmp, *skb_match = NULL;
struct skb_shared_hwtstamps shhwtstamps;
struct lan966x_port *port;
struct timespec64 ts;
unsigned long flags;
u32 val, id, txport;
u32 delay;
val = lan_rd(lan966x, PTP_TWOSTEP_CTRL);
/* Check if a timestamp can be retrieved */
if (!(val & PTP_TWOSTEP_CTRL_VLD))
break;
WARN_ON(val & PTP_TWOSTEP_CTRL_OVFL);
if (!(val & PTP_TWOSTEP_CTRL_STAMP_TX))
continue;
/* Retrieve the ts Tx port */
txport = PTP_TWOSTEP_CTRL_STAMP_PORT_GET(val);
/* Retrieve its associated skb */
port = lan966x->ports[txport];
/* Retrieve the delay */
delay = lan_rd(lan966x, PTP_TWOSTEP_STAMP);
delay = PTP_TWOSTEP_STAMP_STAMP_NSEC_GET(delay);
/* Get next timestamp from fifo, which needs to be the
* rx timestamp which represents the id of the frame
*/
lan_rmw(PTP_TWOSTEP_CTRL_NXT_SET(1),
PTP_TWOSTEP_CTRL_NXT,
lan966x, PTP_TWOSTEP_CTRL);
val = lan_rd(lan966x, PTP_TWOSTEP_CTRL);
/* Check if a timestamp can be retried */
if (!(val & PTP_TWOSTEP_CTRL_VLD))
break;
/* Read RX timestamping to get the ID */
id = lan_rd(lan966x, PTP_TWOSTEP_STAMP);
spin_lock_irqsave(&port->tx_skbs.lock, flags);
skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) {
if (LAN966X_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);
/* Next ts */
lan_rmw(PTP_TWOSTEP_CTRL_NXT_SET(1),
PTP_TWOSTEP_CTRL_NXT,
lan966x, PTP_TWOSTEP_CTRL);
if (WARN_ON(!skb_match))
continue;
spin_lock_irqsave(&lan966x->ptp_ts_id_lock, flags);
lan966x->ptp_skbs--;
spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags);
/* Get the h/w timestamp */
lan966x_get_hwtimestamp(lan966x, &ts, delay);
/* Set the timestamp into the skb */
shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec);
skb_tstamp_tx(skb_match, &shhwtstamps);
dev_kfree_skb_any(skb_match);
}
return IRQ_HANDLED;
}
irqreturn_t lan966x_ptp_ext_irq_handler(int irq, void *args)
{
struct lan966x *lan966x = args;
struct lan966x_phc *phc;
unsigned long flags;
u64 time = 0;
time64_t s;
int pin, i;
s64 ns;
if (!(lan_rd(lan966x, PTP_PIN_INTR)))
return IRQ_NONE;
/* Go through all domains and see which pin generated the interrupt */
for (i = 0; i < LAN966X_PHC_COUNT; ++i) {
struct ptp_clock_event ptp_event = {0};
phc = &lan966x->phc[i];
pin = ptp_find_pin_unlocked(phc->clock, PTP_PF_EXTTS, 0);
if (pin == -1)
continue;
if (!(lan_rd(lan966x, PTP_PIN_INTR) & BIT(pin)))
continue;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
/* Enable to get the new interrupt.
* By writing 1 it clears the bit
*/
lan_wr(BIT(pin), lan966x, PTP_PIN_INTR);
/* Get current time */
s = lan_rd(lan966x, PTP_TOD_SEC_MSB(pin));
s <<= 32;
s |= lan_rd(lan966x, PTP_TOD_SEC_LSB(pin));
ns = lan_rd(lan966x, PTP_TOD_NSEC(pin));
ns &= PTP_TOD_NSEC_TOD_NSEC;
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
if ((ns & 0xFFFFFFF0) == 0x3FFFFFF0) {
s--;
ns &= 0xf;
ns += 999999984;
}
time = ktime_set(s, ns);
ptp_event.index = pin;
ptp_event.timestamp = time;
ptp_event.type = PTP_CLOCK_EXTTS;
ptp_clock_event(phc->clock, &ptp_event);
}
return IRQ_HANDLED;
}
static int lan966x_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
unsigned long flags;
bool neg_adj = 0;
u64 tod_inc;
u64 ref;
if (!scaled_ppm)
return 0;
if (scaled_ppm < 0) {
neg_adj = 1;
scaled_ppm = -scaled_ppm;
}
tod_inc = lan966x_ptp_get_nominal_value();
/* The multiplication is split in 2 separate additions because of
* overflow issues. If scaled_ppm with 16bit fractional part was bigger
* than 20ppm then we got overflow.
*/
ref = LAN966X_1PPM_FORMAT * (scaled_ppm >> 16);
ref += (LAN966X_1PPM_FORMAT * (0xffff & scaled_ppm)) >> 16;
tod_inc = neg_adj ? tod_inc - ref : tod_inc + ref;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(1 << BIT(phc->index)),
PTP_DOM_CFG_CLKCFG_DIS,
lan966x, PTP_DOM_CFG);
lan_wr((u32)tod_inc & 0xFFFFFFFF, lan966x,
PTP_CLK_PER_CFG(phc->index, 0));
lan_wr((u32)(tod_inc >> 32), lan966x,
PTP_CLK_PER_CFG(phc->index, 1));
lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(0),
PTP_DOM_CFG_CLKCFG_DIS,
lan966x, PTP_DOM_CFG);
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
return 0;
}
static int lan966x_ptp_settime64(struct ptp_clock_info *ptp,
const struct timespec64 *ts)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
unsigned long flags;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
/* Must be in IDLE mode before the time can be loaded */
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(TOD_ACC_PIN));
/* Set new value */
lan_wr(PTP_TOD_SEC_MSB_TOD_SEC_MSB_SET(upper_32_bits(ts->tv_sec)),
lan966x, PTP_TOD_SEC_MSB(TOD_ACC_PIN));
lan_wr(lower_32_bits(ts->tv_sec),
lan966x, PTP_TOD_SEC_LSB(TOD_ACC_PIN));
lan_wr(ts->tv_nsec, lan966x, PTP_TOD_NSEC(TOD_ACC_PIN));
/* Apply new values */
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_LOAD) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(TOD_ACC_PIN));
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
return 0;
}
int lan966x_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
unsigned long flags;
time64_t s;
s64 ns;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(TOD_ACC_PIN));
s = lan_rd(lan966x, PTP_TOD_SEC_MSB(TOD_ACC_PIN));
s <<= 32;
s |= lan_rd(lan966x, PTP_TOD_SEC_LSB(TOD_ACC_PIN));
ns = lan_rd(lan966x, PTP_TOD_NSEC(TOD_ACC_PIN));
ns &= PTP_TOD_NSEC_TOD_NSEC;
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
/* Deal with negative values */
if ((ns & 0xFFFFFFF0) == 0x3FFFFFF0) {
s--;
ns &= 0xf;
ns += 999999984;
}
set_normalized_timespec64(ts, s, ns);
return 0;
}
static int lan966x_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
if (delta > -(NSEC_PER_SEC / 2) && delta < (NSEC_PER_SEC / 2)) {
unsigned long flags;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
/* Must be in IDLE mode before the time can be loaded */
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(TOD_ACC_PIN));
lan_wr(PTP_TOD_NSEC_TOD_NSEC_SET(delta),
lan966x, PTP_TOD_NSEC(TOD_ACC_PIN));
/* Adjust time with the value of PTP_TOD_NSEC */
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_DELTA) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(TOD_ACC_PIN));
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
} else {
/* Fall back using lan966x_ptp_settime64 which is not exact */
struct timespec64 ts;
u64 now;
lan966x_ptp_gettime64(ptp, &ts);
now = ktime_to_ns(timespec64_to_ktime(ts));
ts = ns_to_timespec64(now + delta);
lan966x_ptp_settime64(ptp, &ts);
}
return 0;
}
static int lan966x_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
enum ptp_pin_function func, unsigned int chan)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
struct ptp_clock_info *info;
int i;
/* Currently support only 1 channel */
if (chan != 0)
return -1;
switch (func) {
case PTP_PF_NONE:
case PTP_PF_PEROUT:
case PTP_PF_EXTTS:
break;
default:
return -1;
}
/* The PTP pins are shared by all the PHC. So it is required to see if
* the pin is connected to another PHC. The pin is connected to another
* PHC if that pin already has a function on that PHC.
*/
for (i = 0; i < LAN966X_PHC_COUNT; ++i) {
info = &lan966x->phc[i].info;
/* Ignore the check with ourself */
if (ptp == info)
continue;
if (info->pin_config[pin].func == PTP_PF_PEROUT ||
info->pin_config[pin].func == PTP_PF_EXTTS)
return -1;
}
return 0;
}
static int lan966x_ptp_perout(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
struct timespec64 ts_phase, ts_period;
unsigned long flags;
s64 wf_high, wf_low;
bool pps = false;
int pin;
if (rq->perout.flags & ~(PTP_PEROUT_DUTY_CYCLE |
PTP_PEROUT_PHASE))
return -EOPNOTSUPP;
pin = ptp_find_pin(phc->clock, PTP_PF_PEROUT, rq->perout.index);
if (pin == -1 || pin >= LAN966X_PHC_PINS_NUM)
return -EINVAL;
if (!on) {
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(pin));
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
return 0;
}
if (rq->perout.period.sec == 1 &&
rq->perout.period.nsec == 0)
pps = true;
if (rq->perout.flags & PTP_PEROUT_PHASE) {
ts_phase.tv_sec = rq->perout.phase.sec;
ts_phase.tv_nsec = rq->perout.phase.nsec;
} else {
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(lan966x->dev,
"Absolute time not supported!\n");
return -EINVAL;
}
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 {
wf_high = 5000;
}
if (pps) {
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_wr(PTP_WF_LOW_PERIOD_PIN_WFL(ts_phase.tv_nsec),
lan966x, PTP_WF_LOW_PERIOD(pin));
lan_wr(PTP_WF_HIGH_PERIOD_PIN_WFH(wf_high),
lan966x, PTP_WF_HIGH_PERIOD(pin));
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_CLOCK) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(3),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(pin));
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
return 0;
}
ts_period.tv_sec = rq->perout.period.sec;
ts_period.tv_nsec = rq->perout.period.nsec;
wf_low = timespec64_to_ns(&ts_period);
wf_low -= wf_high;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_wr(PTP_WF_LOW_PERIOD_PIN_WFL(wf_low),
lan966x, PTP_WF_LOW_PERIOD(pin));
lan_wr(PTP_WF_HIGH_PERIOD_PIN_WFH(wf_high),
lan966x, PTP_WF_HIGH_PERIOD(pin));
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_CLOCK) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SYNC_SET(0),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SYNC,
lan966x, PTP_PIN_CFG(pin));
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
return 0;
}
static int lan966x_ptp_extts(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on)
{
struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info);
struct lan966x *lan966x = phc->lan966x;
unsigned long flags;
int pin;
u32 val;
if (lan966x->ptp_ext_irq <= 0)
return -EOPNOTSUPP;
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
pin = ptp_find_pin(phc->clock, PTP_PF_EXTTS, rq->extts.index);
if (pin == -1 || pin >= LAN966X_PHC_PINS_NUM)
return -EINVAL;
spin_lock_irqsave(&lan966x->ptp_clock_lock, flags);
lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) |
PTP_PIN_CFG_PIN_SYNC_SET(on ? 3 : 0) |
PTP_PIN_CFG_PIN_DOM_SET(phc->index) |
PTP_PIN_CFG_PIN_SELECT_SET(pin),
PTP_PIN_CFG_PIN_ACTION |
PTP_PIN_CFG_PIN_SYNC |
PTP_PIN_CFG_PIN_DOM |
PTP_PIN_CFG_PIN_SELECT,
lan966x, PTP_PIN_CFG(pin));
val = lan_rd(lan966x, PTP_PIN_INTR_ENA);
if (on)
val |= BIT(pin);
else
val &= ~BIT(pin);
lan_wr(val, lan966x, PTP_PIN_INTR_ENA);
spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags);
return 0;
}
static int lan966x_ptp_enable(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on)
{
switch (rq->type) {
case PTP_CLK_REQ_PEROUT:
return lan966x_ptp_perout(ptp, rq, on);
case PTP_CLK_REQ_EXTTS:
return lan966x_ptp_extts(ptp, rq, on);
default:
return -EOPNOTSUPP;
}
return 0;
}
static struct ptp_clock_info lan966x_ptp_clock_info = {
.owner = THIS_MODULE,
.name = "lan966x ptp",
.max_adj = 200000,
.gettime64 = lan966x_ptp_gettime64,
.settime64 = lan966x_ptp_settime64,
.adjtime = lan966x_ptp_adjtime,
.adjfine = lan966x_ptp_adjfine,
.verify = lan966x_ptp_verify,
.enable = lan966x_ptp_enable,
.n_per_out = LAN966X_PHC_PINS_NUM,
.n_ext_ts = LAN966X_PHC_PINS_NUM,
.n_pins = LAN966X_PHC_PINS_NUM,
};
static int lan966x_ptp_phc_init(struct lan966x *lan966x,
int index,
struct ptp_clock_info *clock_info)
{
struct lan966x_phc *phc = &lan966x->phc[index];
struct ptp_pin_desc *p;
int i;
for (i = 0; i < LAN966X_PHC_PINS_NUM; i++) {
p = &phc->pins[i];
snprintf(p->name, sizeof(p->name), "pin%d", i);
p->index = i;
p->func = PTP_PF_NONE;
}
phc->info = *clock_info;
phc->info.pin_config = &phc->pins[0];
phc->clock = ptp_clock_register(&phc->info, lan966x->dev);
if (IS_ERR(phc->clock))
return PTR_ERR(phc->clock);
phc->index = index;
phc->lan966x = lan966x;
return 0;
}
int lan966x_ptp_init(struct lan966x *lan966x)
{
u64 tod_adj = lan966x_ptp_get_nominal_value();
struct lan966x_port *port;
int err, i;
if (!lan966x->ptp)
return 0;
for (i = 0; i < LAN966X_PHC_COUNT; ++i) {
err = lan966x_ptp_phc_init(lan966x, i, &lan966x_ptp_clock_info);
if (err)
return err;
}
spin_lock_init(&lan966x->ptp_clock_lock);
spin_lock_init(&lan966x->ptp_ts_id_lock);
mutex_init(&lan966x->ptp_lock);
/* Disable master counters */
lan_wr(PTP_DOM_CFG_ENA_SET(0), lan966x, PTP_DOM_CFG);
/* Configure the nominal TOD increment per clock cycle */
lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(0x7),
PTP_DOM_CFG_CLKCFG_DIS,
lan966x, PTP_DOM_CFG);
for (i = 0; i < LAN966X_PHC_COUNT; ++i) {
lan_wr((u32)tod_adj & 0xFFFFFFFF, lan966x,
PTP_CLK_PER_CFG(i, 0));
lan_wr((u32)(tod_adj >> 32), lan966x,
PTP_CLK_PER_CFG(i, 1));
}
lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(0),
PTP_DOM_CFG_CLKCFG_DIS,
lan966x, PTP_DOM_CFG);
/* Enable master counters */
lan_wr(PTP_DOM_CFG_ENA_SET(0x7), lan966x, PTP_DOM_CFG);
for (i = 0; i < lan966x->num_phys_ports; i++) {
port = lan966x->ports[i];
if (!port)
continue;
skb_queue_head_init(&port->tx_skbs);
}
return 0;
}
void lan966x_ptp_deinit(struct lan966x *lan966x)
{
struct lan966x_port *port;
int i;
if (!lan966x->ptp)
return;
for (i = 0; i < lan966x->num_phys_ports; i++) {
port = lan966x->ports[i];
if (!port)
continue;
skb_queue_purge(&port->tx_skbs);
}
for (i = 0; i < LAN966X_PHC_COUNT; ++i)
ptp_clock_unregister(lan966x->phc[i].clock);
}
void lan966x_ptp_rxtstamp(struct lan966x *lan966x, struct sk_buff *skb,
u64 src_port, u64 timestamp)
{
struct skb_shared_hwtstamps *shhwtstamps;
struct lan966x_phc *phc;
struct timespec64 ts;
u64 full_ts_in_ns;
if (!lan966x->ptp ||
!lan966x->ports[src_port]->ptp_rx_cmd)
return;
phc = &lan966x->phc[LAN966X_PHC_PORT];
lan966x_ptp_gettime64(&phc->info, &ts);
/* Drop the sub-ns precision */
timestamp = timestamp >> 2;
if (ts.tv_nsec < timestamp)
ts.tv_sec--;
ts.tv_nsec = timestamp;
full_ts_in_ns = ktime_set(ts.tv_sec, ts.tv_nsec);
shhwtstamps = skb_hwtstamps(skb);
shhwtstamps->hwtstamp = full_ts_in_ns;
}
u32 lan966x_ptp_get_period_ps(void)
{
/* This represents the system clock period in picoseconds */
return 15125;
}
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