@@ -190,6 +190,7 @@ config TI_ICSSG_PRUETH
depends on PRU_REMOTEPROC
depends on ARCH_K3 && OF && TI_K3_UDMA_GLUE_LAYER
depends on PTP_1588_CLOCK_OPTIONAL
+ depends on NET_SCH_TAPRIO
help
Support dual Gigabit Ethernet ports over the ICSSG PRU Subsystem.
This subsystem is available starting with the AM65 platform.
@@ -39,7 +39,8 @@ icssg-prueth-y := icssg/icssg_prueth.o \
icssg/icssg_config.o \
icssg/icssg_mii_cfg.o \
icssg/icssg_stats.o \
- icssg/icssg_ethtool.o
+ icssg/icssg_ethtool.o \
+ icssg/icssg_qos.o
obj-$(CONFIG_TI_ICSSG_PRUETH_SR1) += icssg-prueth-sr1.o
icssg-prueth-sr1-y := icssg/icssg_prueth_sr1.o \
icssg/icssg_common.o \
@@ -685,6 +685,7 @@ static const struct net_device_ops emac_netdev_ops = {
.ndo_eth_ioctl = emac_ndo_ioctl,
.ndo_get_stats64 = emac_ndo_get_stats64,
.ndo_get_phys_port_name = emac_ndo_get_phys_port_name,
+ .ndo_setup_tc = icssg_qos_ndo_setup_tc,
};
static int prueth_netdev_init(struct prueth *prueth,
@@ -819,6 +820,8 @@ static int prueth_netdev_init(struct prueth *prueth,
emac->rx_hrtimer.function = &emac_rx_timer_callback;
prueth->emac[mac] = emac;
+ icssg_qos_tas_init(ndev);
+
return 0;
free:
@@ -37,6 +37,7 @@
#include "icssg_config.h"
#include "icss_iep.h"
#include "icssg_switch_map.h"
+#include "icssg_qos.h"
#define PRUETH_MAX_MTU (2000 - ETH_HLEN - ETH_FCS_LEN)
#define PRUETH_MIN_PKT_SIZE (VLAN_ETH_ZLEN)
@@ -186,6 +187,8 @@ struct prueth_emac {
struct pruss_mem_region dram;
+ struct prueth_qos qos;
+
struct delayed_work stats_work;
u64 stats[ICSSG_NUM_STATS];
new file mode 100644
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Texas Instruments ICSSG PRUETH QoS submodule
+ * Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#include <linux/printk.h>
+#include "icssg_prueth.h"
+#include "icssg_switch_map.h"
+
+static void tas_update_fw_list_pointers(struct prueth_emac *emac)
+{
+ struct tas_config *tas = &emac->qos.tas.config;
+
+ if ((readb(tas->active_list)) == TAS_LIST0) {
+ tas->fw_active_list = emac->dram.va + TAS_GATE_MASK_LIST0;
+ tas->fw_shadow_list = emac->dram.va + TAS_GATE_MASK_LIST1;
+ } else {
+ tas->fw_active_list = emac->dram.va + TAS_GATE_MASK_LIST1;
+ tas->fw_shadow_list = emac->dram.va + TAS_GATE_MASK_LIST0;
+ }
+}
+
+static void tas_update_maxsdu_table(struct prueth_emac *emac)
+{
+ struct tas_config *tas = &emac->qos.tas.config;
+ u16 __iomem *max_sdu_tbl_ptr;
+ u8 gate_idx;
+
+ /* update the maxsdu table */
+ max_sdu_tbl_ptr = emac->dram.va + TAS_QUEUE_MAX_SDU_LIST;
+
+ for (gate_idx = 0; gate_idx < TAS_MAX_NUM_QUEUES; gate_idx++)
+ writew(tas->max_sdu_table.max_sdu[gate_idx], &max_sdu_tbl_ptr[gate_idx]);
+}
+
+static void tas_reset(struct prueth_emac *emac)
+{
+ struct tas_config *tas = &emac->qos.tas.config;
+ int i;
+
+ for (i = 0; i < TAS_MAX_NUM_QUEUES; i++)
+ tas->max_sdu_table.max_sdu[i] = 2048;
+
+ tas_update_maxsdu_table(emac);
+
+ writeb(TAS_LIST0, tas->active_list);
+
+ memset_io(tas->fw_active_list, 0, sizeof(*tas->fw_active_list));
+ memset_io(tas->fw_shadow_list, 0, sizeof(*tas->fw_shadow_list));
+}
+
+static int tas_set_state(struct prueth_emac *emac, enum tas_state state)
+{
+ struct tas_config *tas = &emac->qos.tas.config;
+ int ret;
+
+ if (tas->state == state)
+ return 0;
+
+ switch (state) {
+ case TAS_STATE_RESET:
+ tas_reset(emac);
+ ret = emac_set_port_state(emac, ICSSG_EMAC_PORT_TAS_RESET);
+ tas->state = TAS_STATE_RESET;
+ break;
+ case TAS_STATE_ENABLE:
+ ret = emac_set_port_state(emac, ICSSG_EMAC_PORT_TAS_ENABLE);
+ tas->state = TAS_STATE_ENABLE;
+ break;
+ case TAS_STATE_DISABLE:
+ ret = emac_set_port_state(emac, ICSSG_EMAC_PORT_TAS_DISABLE);
+ tas->state = TAS_STATE_DISABLE;
+ break;
+ default:
+ netdev_err(emac->ndev, "%s: unsupported state\n", __func__);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret)
+ netdev_err(emac->ndev, "TAS set state failed %d\n", ret);
+ return ret;
+}
+
+static int tas_set_trigger_list_change(struct prueth_emac *emac)
+{
+ struct tc_taprio_qopt_offload *admin_list = emac->qos.tas.taprio_admin;
+ struct tas_config *tas = &emac->qos.tas.config;
+ struct ptp_system_timestamp sts;
+ u32 change_cycle_count;
+ u32 cycle_time;
+ u64 base_time;
+ u64 cur_time;
+
+ /* IEP clock has a hardware errata due to which it wraps around exactly
+ * once every taprio cycle. To compensate for that, adjust cycle time
+ * by the wrap around time which is stored in emac->iep->def_inc
+ */
+ cycle_time = admin_list->cycle_time - emac->iep->def_inc;
+ base_time = admin_list->base_time;
+ cur_time = prueth_iep_gettime(emac, &sts);
+
+ if (base_time > cur_time)
+ change_cycle_count = DIV_ROUND_UP_ULL(base_time - cur_time, cycle_time);
+ else
+ change_cycle_count = 1;
+
+ writel(cycle_time, emac->dram.va + TAS_ADMIN_CYCLE_TIME);
+ writel(change_cycle_count, emac->dram.va + TAS_CONFIG_CHANGE_CYCLE_COUNT);
+ writeb(admin_list->num_entries, emac->dram.va + TAS_ADMIN_LIST_LENGTH);
+
+ /* config_change cleared by f/w to ack reception of new shadow list */
+ writeb(1, &tas->config_list->config_change);
+ /* config_pending cleared by f/w when new shadow list is copied to active list */
+ writeb(1, &tas->config_list->config_pending);
+
+ return emac_set_port_state(emac, ICSSG_EMAC_PORT_TAS_TRIGGER);
+}
+
+static int tas_update_oper_list(struct prueth_emac *emac)
+{
+ struct tc_taprio_qopt_offload *admin_list = emac->qos.tas.taprio_admin;
+ struct tas_config *tas = &emac->qos.tas.config;
+ u32 tas_acc_gate_close_time = 0;
+ u8 idx, gate_idx, val;
+ int ret;
+
+ if (admin_list->cycle_time > TAS_MAX_CYCLE_TIME)
+ return -EINVAL;
+
+ tas_update_fw_list_pointers(emac);
+
+ for (idx = 0; idx < admin_list->num_entries; idx++) {
+ writeb(admin_list->entries[idx].gate_mask,
+ &tas->fw_shadow_list->gate_mask_list[idx]);
+ tas_acc_gate_close_time += admin_list->entries[idx].interval;
+
+ /* extend last entry till end of cycle time */
+ if (idx == admin_list->num_entries - 1)
+ writel(admin_list->cycle_time,
+ &tas->fw_shadow_list->win_end_time_list[idx]);
+ else
+ writel(tas_acc_gate_close_time,
+ &tas->fw_shadow_list->win_end_time_list[idx]);
+ }
+
+ /* clear remaining entries */
+ for (idx = admin_list->num_entries; idx < TAS_MAX_CMD_LISTS; idx++) {
+ writeb(0, &tas->fw_shadow_list->gate_mask_list[idx]);
+ writel(0, &tas->fw_shadow_list->win_end_time_list[idx]);
+ }
+
+ /* update the Array of gate close time for each queue in each window */
+ for (idx = 0 ; idx < admin_list->num_entries; idx++) {
+ /* On Linux, only PRUETH_MAX_TX_QUEUES are supported per port */
+ for (gate_idx = 0; gate_idx < PRUETH_MAX_TX_QUEUES; gate_idx++) {
+ u8 gate_mask_list_idx = readb(&tas->fw_shadow_list->gate_mask_list[idx]);
+ u32 gate_close_time = 0;
+
+ if (gate_mask_list_idx & BIT(gate_idx))
+ gate_close_time = readl(&tas->fw_shadow_list->win_end_time_list[idx]);
+
+ writel(gate_close_time,
+ &tas->fw_shadow_list->gate_close_time_list[idx][gate_idx]);
+ }
+ }
+
+ /* tell f/w to swap active & shadow list */
+ ret = tas_set_trigger_list_change(emac);
+ if (ret) {
+ netdev_err(emac->ndev, "failed to swap f/w config list: %d\n", ret);
+ return ret;
+ }
+
+ /* Wait for completion */
+ ret = readb_poll_timeout(&tas->config_list->config_change, val, !val,
+ USEC_PER_MSEC, 10 * USEC_PER_MSEC);
+ if (ret) {
+ netdev_err(emac->ndev, "TAS list change completion time out\n");
+ return ret;
+ }
+
+ tas_update_fw_list_pointers(emac);
+
+ return 0;
+}
+
+static int emac_taprio_replace(struct net_device *ndev,
+ struct tc_taprio_qopt_offload *taprio)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ int ret;
+
+ if (taprio->cycle_time_extension) {
+ NL_SET_ERR_MSG_MOD(taprio->extack, "Cycle time extension not supported");
+ return -EOPNOTSUPP;
+ }
+
+ if (taprio->cycle_time < TAS_MIN_CYCLE_TIME) {
+ NL_SET_ERR_MSG_FMT_MOD(taprio->extack, "cycle_time %llu is less than min supported cycle_time %d",
+ taprio->cycle_time, TAS_MIN_CYCLE_TIME);
+ return -EINVAL;
+ }
+
+ if (taprio->num_entries > TAS_MAX_CMD_LISTS) {
+ NL_SET_ERR_MSG_FMT_MOD(taprio->extack, "num_entries %lu is more than max supported entries %d",
+ taprio->num_entries, TAS_MAX_CMD_LISTS);
+ return -EINVAL;
+ }
+
+ if (emac->qos.tas.taprio_admin)
+ taprio_offload_free(emac->qos.tas.taprio_admin);
+
+ emac->qos.tas.taprio_admin = taprio_offload_get(taprio);
+ ret = tas_update_oper_list(emac);
+ if (ret)
+ goto clear_taprio;
+
+ ret = tas_set_state(emac, TAS_STATE_ENABLE);
+ if (ret)
+ goto clear_taprio;
+
+clear_taprio:
+ emac->qos.tas.taprio_admin = NULL;
+ taprio_offload_free(taprio);
+
+ return ret;
+}
+
+static int emac_taprio_destroy(struct net_device *ndev,
+ struct tc_taprio_qopt_offload *taprio)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ int ret;
+
+ taprio_offload_free(taprio);
+
+ ret = tas_set_state(emac, TAS_STATE_RESET);
+ if (ret)
+ return ret;
+
+ return tas_set_state(emac, TAS_STATE_DISABLE);
+}
+
+static int emac_setup_taprio(struct net_device *ndev, void *type_data)
+{
+ struct tc_taprio_qopt_offload *taprio = type_data;
+ int ret;
+
+ switch (taprio->cmd) {
+ case TAPRIO_CMD_REPLACE:
+ ret = emac_taprio_replace(ndev, taprio);
+ break;
+ case TAPRIO_CMD_DESTROY:
+ ret = emac_taprio_destroy(ndev, taprio);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ }
+
+ return ret;
+}
+
+int icssg_qos_ndo_setup_tc(struct net_device *ndev, enum tc_setup_type type,
+ void *type_data)
+{
+ switch (type) {
+ case TC_SETUP_QDISC_TAPRIO:
+ return emac_setup_taprio(ndev, type_data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+void icssg_qos_tas_init(struct net_device *ndev)
+{
+ struct prueth_emac *emac = netdev_priv(ndev);
+ struct tas_config *tas;
+
+ tas = &emac->qos.tas.config;
+
+ tas->config_list = emac->dram.va + TAS_CONFIG_CHANGE_TIME;
+ tas->active_list = emac->dram.va + TAS_ACTIVE_LIST_INDEX;
+
+ tas_update_fw_list_pointers(emac);
+
+ tas_set_state(emac, TAS_STATE_RESET);
+}
new file mode 100644
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#ifndef __NET_TI_ICSSG_QOS_H
+#define __NET_TI_ICSSG_QOS_H
+
+#include <linux/atomic.h>
+#include <linux/netdevice.h>
+#include <net/pkt_sched.h>
+
+/* Maximum number of gate command entries in each list. */
+#define TAS_MAX_CMD_LISTS (16)
+
+/* Maximum number of transmit queues supported by implementation */
+#define TAS_MAX_NUM_QUEUES (8)
+
+/* Minimum cycle time supported by implementation (in ns) */
+#define TAS_MIN_CYCLE_TIME (1000000)
+
+/* Minimum cycle time supported by implementation (in ns) */
+#define TAS_MAX_CYCLE_TIME (4000000000)
+
+/* Minimum TAS window duration supported by implementation (in ns) */
+#define TAS_MIN_WINDOW_DURATION (10000)
+
+/**
+ * enum tas_list_num - TAS list number
+ * @TAS_LIST0: TAS list number is 0
+ * @TAS_LIST1: TAS list number is 1
+ */
+enum tas_list_num {
+ TAS_LIST0 = 0,
+ TAS_LIST1 = 1
+};
+
+/**
+ * enum tas_state - State of TAS in firmware
+ * @TAS_STATE_DISABLE: TAS state machine is disabled.
+ * @TAS_STATE_ENABLE: TAS state machine is enabled.
+ * @TAS_STATE_RESET: TAS state machine is reset.
+ */
+enum tas_state {
+ TAS_STATE_DISABLE = 0,
+ TAS_STATE_ENABLE = 1,
+ TAS_STATE_RESET = 2,
+};
+
+/**
+ * struct tas_config_list - Config state machine variables
+ * @config_change_time: New list is copied at this time
+ * @config_change_error_counter: Incremented if admin->BaseTime < current time
+ * and TAS_enabled is true
+ * @config_pending: True if list update is pending
+ * @config_change: Set to true when application trigger updating of admin list
+ * to active list, cleared when configChangeTime is updated
+ */
+struct tas_config_list {
+ u64 config_change_time;
+ u32 config_change_error_counter;
+ u8 config_pending;
+ u8 config_change;
+};
+
+/* Max SDU table. See IEEE Std 802.1Q-2018 12.29.1.1 */
+struct tas_max_sdu_table {
+ u16 max_sdu[TAS_MAX_NUM_QUEUES];
+};
+
+/**
+ * struct tas_firmware_list - TAS List Structure based on firmware memory map
+ * @gate_mask_list: Window gate mask list
+ * @win_end_time_list: Window end time list
+ * @gate_close_time_list: Array of gate close time for each queue in each window
+ */
+struct tas_firmware_list {
+ u8 gate_mask_list[TAS_MAX_CMD_LISTS];
+ u32 win_end_time_list[TAS_MAX_CMD_LISTS];
+ u32 gate_close_time_list[TAS_MAX_CMD_LISTS][TAS_MAX_NUM_QUEUES];
+};
+
+/**
+ * struct tas_config - Main Time Aware Shaper Handle
+ * @state: TAS state
+ * @max_sdu_table: Max SDU table
+ * @config_list: Config change variables
+ * @active_list: Current operating list operating list
+ * @fw_active_list: Active List pointer, used by firmware
+ * @fw_shadow_list: Shadow List pointer, used by driver
+ */
+struct tas_config {
+ enum tas_state state;
+ struct tas_max_sdu_table max_sdu_table;
+ struct tas_config_list __iomem *config_list;
+ u8 __iomem *active_list;
+ struct tas_firmware_list __iomem *fw_active_list;
+ struct tas_firmware_list __iomem *fw_shadow_list;
+};
+
+struct prueth_qos_tas {
+ struct tc_taprio_qopt_offload *taprio_admin;
+ struct tc_taprio_qopt_offload *taprio_oper;
+ struct tas_config config;
+};
+
+struct prueth_qos {
+ struct prueth_qos_tas tas;
+};
+
+void icssg_qos_tas_init(struct net_device *ndev);
+int icssg_qos_ndo_setup_tc(struct net_device *ndev, enum tc_setup_type type,
+ void *type_data);
+#endif /* __NET_TI_ICSSG_QOS_H */