*/
#include <linux/pm_runtime.h>
+#include <linux/math.h>
#include <linux/time.h>
+#include <linux/units.h>
#include <net/pkt_cls.h>
#include "am65-cpsw-nuss.h"
#include "am65-cpts.h"
#include "cpsw_ale.h"
+#define TO_MBPS(x) DIV_ROUND_UP((x), BYTES_PER_MBIT)
+
enum timer_act {
TACT_PROG, /* need program timer */
TACT_NEED_STOP, /* need stop first */
return ir;
}
+static void am65_cpsw_tx_pn_shaper_reset(struct am65_cpsw_port *port)
+{
+ int prio;
+
+ for (prio = 0; prio < AM65_CPSW_PN_FIFO_PRIO_NUM; prio++) {
+ writel(0, port->port_base + AM65_CPSW_PN_REG_PRI_CIR(prio));
+ writel(0, port->port_base + AM65_CPSW_PN_REG_PRI_EIR(prio));
+ }
+}
+
+static void am65_cpsw_tx_pn_shaper_apply(struct am65_cpsw_port *port)
+{
+ struct am65_cpsw_mqprio *p_mqprio = &port->qos.mqprio;
+ struct am65_cpsw_common *common = port->common;
+ struct tc_mqprio_qopt_offload *mqprio;
+ bool enable, shaper_susp = false;
+ u32 rate_mbps;
+ int tc, prio;
+
+ mqprio = &p_mqprio->mqprio_hw;
+ /* takes care of no link case as well */
+ if (p_mqprio->max_rate_total > port->qos.link_speed)
+ shaper_susp = true;
+
+ am65_cpsw_tx_pn_shaper_reset(port);
+
+ enable = p_mqprio->shaper_en && !shaper_susp;
+ if (!enable)
+ return;
+
+ /* Rate limit is specified per Traffic Class but
+ * for CPSW, rate limit can be applied per priority
+ * at port FIFO.
+ *
+ * We have assigned the same priority (TCn) to all queues
+ * of a Traffic Class so they share the same shaper
+ * bandwidth.
+ */
+ for (tc = 0; tc < mqprio->qopt.num_tc; tc++) {
+ prio = tc;
+
+ rate_mbps = TO_MBPS(mqprio->min_rate[tc]);
+ rate_mbps = am65_cpsw_qos_tx_rate_calc(rate_mbps,
+ common->bus_freq);
+ writel(rate_mbps,
+ port->port_base + AM65_CPSW_PN_REG_PRI_CIR(prio));
+
+ rate_mbps = 0;
+
+ if (mqprio->max_rate[tc]) {
+ rate_mbps = mqprio->max_rate[tc] - mqprio->min_rate[tc];
+ rate_mbps = TO_MBPS(rate_mbps);
+ rate_mbps = am65_cpsw_qos_tx_rate_calc(rate_mbps,
+ common->bus_freq);
+ }
+
+ writel(rate_mbps,
+ port->port_base + AM65_CPSW_PN_REG_PRI_EIR(prio));
+ }
+}
+
+static int am65_cpsw_mqprio_verify_shaper(struct am65_cpsw_port *port,
+ struct tc_mqprio_qopt_offload *mqprio)
+{
+ struct am65_cpsw_mqprio *p_mqprio = &port->qos.mqprio;
+ struct netlink_ext_ack *extack = mqprio->extack;
+ u64 min_rate_total = 0, max_rate_total = 0;
+ u32 min_rate_msk = 0, max_rate_msk = 0;
+ bool has_min_rate, has_max_rate;
+ int num_tc, i;
+
+ if (!(mqprio->flags & TC_MQPRIO_F_SHAPER))
+ return 0;
+
+ if (mqprio->shaper != TC_MQPRIO_SHAPER_BW_RATE)
+ return 0;
+
+ has_min_rate = !!(mqprio->flags & TC_MQPRIO_F_MIN_RATE);
+ has_max_rate = !!(mqprio->flags & TC_MQPRIO_F_MAX_RATE);
+
+ if (!has_min_rate && has_max_rate) {
+ NL_SET_ERR_MSG_MOD(extack, "min_rate is required with max_rate");
+ return -EOPNOTSUPP;
+ }
+
+ if (!has_min_rate)
+ return 0;
+
+ num_tc = mqprio->qopt.num_tc;
+
+ for (i = num_tc - 1; i >= 0; i--) {
+ u32 ch_msk;
+
+ if (mqprio->min_rate[i])
+ min_rate_msk |= BIT(i);
+ min_rate_total += mqprio->min_rate[i];
+
+ if (has_max_rate) {
+ if (mqprio->max_rate[i])
+ max_rate_msk |= BIT(i);
+ max_rate_total += mqprio->max_rate[i];
+
+ if (!mqprio->min_rate[i] && mqprio->max_rate[i]) {
+ NL_SET_ERR_MSG_FMT_MOD(extack,
+ "TX tc%d rate max>0 but min=0",
+ i);
+ return -EINVAL;
+ }
+
+ if (mqprio->max_rate[i] &&
+ mqprio->max_rate[i] < mqprio->min_rate[i]) {
+ NL_SET_ERR_MSG_FMT_MOD(extack,
+ "TX tc%d rate min(%llu)>max(%llu)",
+ i, mqprio->min_rate[i],
+ mqprio->max_rate[i]);
+ return -EINVAL;
+ }
+ }
+
+ ch_msk = GENMASK(num_tc - 1, i);
+ if ((min_rate_msk & BIT(i)) && (min_rate_msk ^ ch_msk)) {
+ NL_SET_ERR_MSG_FMT_MOD(extack,
+ "Min rate must be set sequentially hi->lo tx_rate_msk%x",
+ min_rate_msk);
+ return -EINVAL;
+ }
+
+ if ((max_rate_msk & BIT(i)) && (max_rate_msk ^ ch_msk)) {
+ NL_SET_ERR_MSG_FMT_MOD(extack,
+ "Max rate must be set sequentially hi->lo tx_rate_msk%x",
+ max_rate_msk);
+ return -EINVAL;
+ }
+ }
+
+ min_rate_total = TO_MBPS(min_rate_total);
+ max_rate_total = TO_MBPS(max_rate_total);
+
+ p_mqprio->shaper_en = true;
+ p_mqprio->max_rate_total = max_t(u64, min_rate_total, max_rate_total);
+
+ return 0;
+}
+
+static void am65_cpsw_reset_tc_mqprio(struct net_device *ndev)
+{
+ struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ struct am65_cpsw_mqprio *p_mqprio = &port->qos.mqprio;
+
+ p_mqprio->shaper_en = false;
+ p_mqprio->max_rate_total = 0;
+
+ am65_cpsw_tx_pn_shaper_reset(port);
+ netdev_reset_tc(ndev);
+
+ /* Reset all Queue priorities to 0 */
+ writel(0, port->port_base + AM65_CPSW_PN_REG_TX_PRI_MAP);
+}
+
+static int am65_cpsw_setup_mqprio(struct net_device *ndev, void *type_data)
+{
+ struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ struct am65_cpsw_mqprio *p_mqprio = &port->qos.mqprio;
+ struct tc_mqprio_qopt_offload *mqprio = type_data;
+ struct am65_cpsw_common *common = port->common;
+ struct tc_mqprio_qopt *qopt = &mqprio->qopt;
+ int i, tc, offset, count, prio, ret;
+ u8 num_tc = qopt->num_tc;
+ u32 tx_prio_map = 0;
+
+ memcpy(&p_mqprio->mqprio_hw, mqprio, sizeof(*mqprio));
+
+ ret = pm_runtime_get_sync(common->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(common->dev);
+ return ret;
+ }
+
+ if (!num_tc) {
+ am65_cpsw_reset_tc_mqprio(ndev);
+ ret = 0;
+ goto exit_put;
+ }
+
+ ret = am65_cpsw_mqprio_verify_shaper(port, mqprio);
+ if (ret)
+ goto exit_put;
+
+ netdev_set_num_tc(ndev, num_tc);
+
+ /* Multiple Linux priorities can map to a Traffic Class
+ * A Traffic Class can have multiple contiguous Queues,
+ * Queues get mapped to Channels (thread_id),
+ * if not VLAN tagged, thread_id is used as packet_priority
+ * if VLAN tagged. VLAN priority is used as packet_priority
+ * packet_priority gets mapped to header_priority in p0_rx_pri_map,
+ * header_priority gets mapped to switch_priority in pn_tx_pri_map.
+ * As p0_rx_pri_map is left at defaults (0x76543210), we can
+ * assume that Queue_n gets mapped to header_priority_n. We can then
+ * set the switch priority in pn_tx_pri_map.
+ */
+
+ for (tc = 0; tc < num_tc; tc++) {
+ prio = tc;
+
+ /* For simplicity we assign the same priority (TCn) to
+ * all queues of a Traffic Class.
+ */
+ for (i = qopt->offset[tc]; i < qopt->offset[tc] + qopt->count[tc]; i++)
+ tx_prio_map |= prio << (4 * i);
+
+ count = qopt->count[tc];
+ offset = qopt->offset[tc];
+ netdev_set_tc_queue(ndev, tc, count, offset);
+ }
+
+ writel(tx_prio_map, port->port_base + AM65_CPSW_PN_REG_TX_PRI_MAP);
+
+ am65_cpsw_tx_pn_shaper_apply(port);
+
+exit_put:
+ pm_runtime_put(common->dev);
+
+ return ret;
+}
+
static int am65_cpsw_port_est_enabled(struct am65_cpsw_port *port)
{
return port->qos.est_oper || port->qos.est_admin;
port->qos.est_oper = NULL;
port->qos.est_admin = NULL;
+
+ am65_cpsw_reset_tc_mqprio(ndev);
}
static void am65_cpsw_cp_taprio(struct tc_taprio_qopt_offload *from,
if (!est_new)
return -ENOMEM;
+ ret = am65_cpsw_setup_mqprio(ndev, &taprio->mqprio);
+ if (ret)
+ return ret;
+
am65_cpsw_cp_taprio(taprio, &est_new->taprio);
am65_cpsw_est_update_state(ndev);
return 0;
fail:
+ am65_cpsw_reset_tc_mqprio(ndev);
devm_kfree(&ndev->dev, est_new);
return ret;
}
ktime_t cur_time;
s64 delta;
- port->qos.link_speed = link_speed;
if (!am65_cpsw_port_est_enabled(port))
return;
struct tc_query_caps_base *base = type_data;
switch (base->type) {
+ case TC_SETUP_QDISC_MQPRIO: {
+ struct tc_mqprio_caps *caps = base->caps;
+
+ caps->validate_queue_counts = true;
+
+ return 0;
+ }
+
case TC_SETUP_QDISC_TAPRIO: {
struct tc_taprio_caps *caps = base->caps;
return am65_cpsw_tc_query_caps(ndev, type_data);
case TC_SETUP_QDISC_TAPRIO:
return am65_cpsw_setup_taprio(ndev, type_data);
+ case TC_SETUP_QDISC_MQPRIO:
+ return am65_cpsw_setup_mqprio(ndev, type_data);
case TC_SETUP_BLOCK:
return am65_cpsw_qos_setup_tc_block(ndev, type_data);
default:
{
struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ port->qos.link_speed = link_speed;
+ am65_cpsw_tx_pn_shaper_apply(port);
+
am65_cpsw_est_link_up(ndev, link_speed);
port->qos.link_down_time = 0;
}
{
struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ port->qos.link_speed = SPEED_UNKNOWN;
+ am65_cpsw_tx_pn_shaper_apply(port);
+
if (!port->qos.link_down_time)
port->qos.link_down_time = ktime_get();
-
- port->qos.link_speed = SPEED_UNKNOWN;
}
projects / linux-block.git / commitdiff