From patchwork Tue Sep 20 09:00:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Horatiu Vultur X-Patchwork-Id: 12981641 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F39BFC6FA8E for ; Tue, 20 Sep 2022 08:58:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231522AbiITI6j (ORCPT ); Tue, 20 Sep 2022 04:58:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231317AbiITI6X (ORCPT ); Tue, 20 Sep 2022 04:58:23 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26E706BCF9; Tue, 20 Sep 2022 01:57:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1663664262; x=1695200262; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=xBaqoT4euPB8dT47YtZpcSSy18VRHTSwtab3bySpZxI=; b=ZWuYBeOMzFOVPKT9/2NVrUrwFMGcjW658OFGRlDDIZriePR9k1pgnmjx cAVHSeQcq7qUVANauqSrc0eJ3nyh0dZo8unMeN5DEIRPIXQLmshWnGfUV 0NC9J18NI1ij8E4O5VU14zmdd3PlS+G09DCWVTl1Ek7pEDTkANwoePnY2 Gv7qMvP6EirHEyEb/gpS1JylqM9TsRZxQYMK3/Ii8/npjaqgG+orfv+h3 w6ZGY4B7Q7pP3JMUobcYCR9wu8KKauQpOn/IIRCCW+gP/dFLu8G+75lwE i/PDD/BjC0SqmOQ/Q9qKaClq/iNN93xPQVxCMkUXfhwlPH3exxHeyVqcs w==; X-IronPort-AV: E=Sophos;i="5.93,330,1654585200"; d="scan'208";a="178002723" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 20 Sep 2022 01:57:42 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Tue, 20 Sep 2022 01:57:42 -0700 Received: from soft-dev3-1.microsemi.net (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Tue, 20 Sep 2022 01:57:40 -0700 From: Horatiu Vultur To: , CC: , , , , , Horatiu Vultur Subject: [PATCH net-next 4/4] net: lan966x: Add offload support for taprio Date: Tue, 20 Sep 2022 11:00:10 +0200 Message-ID: <20220920090010.305172-5-horatiu.vultur@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20220920090010.305172-1-horatiu.vultur@microchip.com> References: <20220920090010.305172-1-horatiu.vultur@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Lan966x switch supports time-based egress shaping in hardware according to IEEE 802.1Qbv. Add support for TAS configuration on egress port of lan966x switch. Signed-off-by: Horatiu Vultur --- .../net/ethernet/microchip/lan966x/Makefile | 2 +- .../ethernet/microchip/lan966x/lan966x_main.c | 3 + .../ethernet/microchip/lan966x/lan966x_main.h | 10 + .../ethernet/microchip/lan966x/lan966x_port.c | 2 + .../ethernet/microchip/lan966x/lan966x_ptp.c | 9 +- .../microchip/lan966x/lan966x_taprio.c | 528 ++++++++++++++++++ .../ethernet/microchip/lan966x/lan966x_tc.c | 9 + 7 files changed, 560 insertions(+), 3 deletions(-) create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_taprio.c diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile index 2ea66b94abac9..cac8b3901eaef 100644 --- a/drivers/net/ethernet/microchip/lan966x/Makefile +++ b/drivers/net/ethernet/microchip/lan966x/Makefile @@ -9,4 +9,4 @@ lan966x-switch-objs := lan966x_main.o lan966x_phylink.o lan966x_port.o \ lan966x_mac.o lan966x_ethtool.o lan966x_switchdev.o \ lan966x_vlan.o lan966x_fdb.o lan966x_mdb.o \ lan966x_ptp.o lan966x_fdma.o lan966x_lag.o \ - lan966x_tc.o lan966x_mqprio.o + lan966x_tc.o lan966x_mqprio.o lan966x_taprio.o diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index 033120a5b056c..b98d37c76edbc 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -963,6 +963,8 @@ static void lan966x_init(struct lan966x *lan966x) lan966x, ANA_ANAINTR); spin_lock_init(&lan966x->tx_lock); + + lan966x_taprio_init(lan966x); } static int lan966x_ram_init(struct lan966x *lan966x) @@ -1172,6 +1174,7 @@ static int lan966x_remove(struct platform_device *pdev) { struct lan966x *lan966x = platform_get_drvdata(pdev); + lan966x_taprio_deinit(lan966x); lan966x_fdma_deinit(lan966x); lan966x_cleanup_ports(lan966x); diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h index b037b1feec8f3..1aad6315869f9 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h @@ -9,6 +9,7 @@ #include #include #include +#include #include #include "lan966x_regs.h" @@ -410,6 +411,8 @@ void lan966x_ptp_txtstamp_release(struct lan966x_port *port, struct sk_buff *skb); irqreturn_t lan966x_ptp_irq_handler(int irq, void *args); irqreturn_t lan966x_ptp_ext_irq_handler(int irq, void *args); +u32 lan966x_ptp_get_period_ps(void); +int lan966x_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts); int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev); int lan966x_fdma_change_mtu(struct lan966x *lan966x); @@ -452,6 +455,13 @@ int lan966x_tc_setup(struct net_device *dev, enum tc_setup_type type, int lan966x_mqprio_add(struct lan966x_port *port, u8 num_tc); int lan966x_mqprio_del(struct lan966x_port *port); +void lan966x_taprio_init(struct lan966x *lan966x); +void lan966x_taprio_deinit(struct lan966x *lan966x); +int lan966x_taprio_enable(struct lan966x_port *port, + struct tc_taprio_qopt_offload *qopt); +int lan966x_taprio_disable(struct lan966x_port *port); +int lan966x_taprio_speed_set(struct lan966x_port *port, int speed); + static inline void __iomem *lan_addr(void __iomem *base[], int id, int tinst, int tcnt, int gbase, int ginst, diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c index 702542fa0902d..0050fcb988b75 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c @@ -165,6 +165,8 @@ static void lan966x_port_link_up(struct lan966x_port *port) break; } + lan966x_taprio_speed_set(port, config->speed); + /* Also the GIGA_MODE_ENA(1) needs to be set regardless of the * port speed for QSGMII ports. */ diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c index 3a621c5165bc5..e5a2bbe064f8f 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c @@ -464,8 +464,7 @@ static int lan966x_ptp_settime64(struct ptp_clock_info *ptp, return 0; } -static int lan966x_ptp_gettime64(struct ptp_clock_info *ptp, - struct timespec64 *ts) +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; @@ -890,3 +889,9 @@ void lan966x_ptp_rxtstamp(struct lan966x *lan966x, struct sk_buff *skb, 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; +} diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_taprio.c b/drivers/net/ethernet/microchip/lan966x/lan966x_taprio.c new file mode 100644 index 0000000000000..42d21f270d5a6 --- /dev/null +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_taprio.c @@ -0,0 +1,528 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include "lan966x_main.h" + +#define LAN966X_TAPRIO_TIMEOUT_MS 1000 +#define LAN966X_TAPRIO_ENTRIES_PER_PORT 2 + +/* Minimum supported cycle time in nanoseconds */ +#define LAN966X_TAPRIO_MIN_CYCLE_TIME_NS NSEC_PER_USEC + +/* Maximum supported cycle time in nanoseconds */ +#define LAN966X_TAPRIO_MAX_CYCLE_TIME_NS (NSEC_PER_SEC - 1) + +/* Total number of TAS GCL entries */ +#define LAN966X_TAPRIO_NUM_GCL 256 + +/* TAPRIO link speeds for calculation of guard band */ +enum lan966x_taprio_link_speed { + LAN966X_TAPRIO_SPEED_NO_GB, + LAN966X_TAPRIO_SPEED_10, + LAN966X_TAPRIO_SPEED_100, + LAN966X_TAPRIO_SPEED_1000, + LAN966X_TAPRIO_SPEED_2500, +}; + +/* TAPRIO list states */ +enum lan966x_taprio_state { + LAN966X_TAPRIO_STATE_ADMIN, + LAN966X_TAPRIO_STATE_ADVANCING, + LAN966X_TAPRIO_STATE_PENDING, + LAN966X_TAPRIO_STATE_OPERATING, + LAN966X_TAPRIO_STATE_TERMINATING, + LAN966X_TAPRIO_STATE_MAX, +}; + +/* TAPRIO GCL command */ +enum lan966x_taprio_gcl_cmd { + LAN966X_TAPRIO_GCL_CMD_SET_GATE_STATES = 0, +}; + +static u32 lan966x_taprio_list_index(struct lan966x_port *port, u8 entry) +{ + return port->chip_port * LAN966X_TAPRIO_ENTRIES_PER_PORT + entry; +} + +static u32 lan966x_taprio_list_state_get(struct lan966x_port *port) +{ + struct lan966x *lan966x = port->lan966x; + u32 val; + + val = lan_rd(lan966x, QSYS_TAS_LST); + return QSYS_TAS_LST_LIST_STATE_GET(val); +} + +static u32 lan966x_taprio_list_index_state_get(struct lan966x_port *port, + u32 list) +{ + struct lan966x *lan966x = port->lan966x; + + lan_rmw(QSYS_TAS_CFG_CTRL_LIST_NUM_SET(list), + QSYS_TAS_CFG_CTRL_LIST_NUM, + lan966x, QSYS_TAS_CFG_CTRL); + + return lan966x_taprio_list_state_get(port); +} + +static void lan966x_taprio_list_state_set(struct lan966x_port *port, + u32 state) +{ + struct lan966x *lan966x = port->lan966x; + + lan_rmw(QSYS_TAS_LST_LIST_STATE_SET(state), + QSYS_TAS_LST_LIST_STATE, + lan966x, QSYS_TAS_LST); +} + +static int lan966x_taprio_list_shutdown(struct lan966x_port *port, + u32 list) +{ + struct lan966x *lan966x = port->lan966x; + bool pending, operating; + unsigned long end; + u32 state; + + end = jiffies + msecs_to_jiffies(LAN966X_TAPRIO_TIMEOUT_MS); + /* It is required to try multiple times to set the state of list, + * because the HW can overwrite this. + */ + do { + state = lan966x_taprio_list_state_get(port); + + pending = false; + operating = false; + + if (state == LAN966X_TAPRIO_STATE_ADVANCING || + state == LAN966X_TAPRIO_STATE_PENDING) { + lan966x_taprio_list_state_set(port, + LAN966X_TAPRIO_STATE_ADMIN); + pending = true; + } + + if (state == LAN966X_TAPRIO_STATE_OPERATING) { + lan966x_taprio_list_state_set(port, + LAN966X_TAPRIO_STATE_TERMINATING); + operating = true; + } + + /* If the entry was in pending and now gets in admin, then there + * is nothing else to do, so just bail out + */ + state = lan966x_taprio_list_state_get(port); + if (pending && + state == LAN966X_TAPRIO_STATE_ADMIN) + return 0; + + /* If the list was in operating and now is in terminating or + * admin, then is OK to exit but it needs to wait until the list + * will get in admin. It is not required to set the state + * again. + */ + if (operating && + (state == LAN966X_TAPRIO_STATE_TERMINATING || + state == LAN966X_TAPRIO_STATE_ADMIN)) + break; + + } while (!time_after(jiffies, end)); + + end = jiffies + msecs_to_jiffies(LAN966X_TAPRIO_TIMEOUT_MS); + do { + state = lan966x_taprio_list_state_get(port); + if (state == LAN966X_TAPRIO_STATE_ADMIN) + break; + + } while (!time_after(jiffies, end)); + + /* If the list was in operating mode, it could be stopped while some + * queues where closed, so make sure to restore "all-queues-open" + */ + if (operating) { + lan_wr(QSYS_TAS_GS_CTRL_HSCH_POS_SET(port->chip_port), + lan966x, QSYS_TAS_GS_CTRL); + + lan_wr(QSYS_TAS_GATE_STATE_TAS_GATE_STATE_SET(0xff), + lan966x, QSYS_TAS_GATE_STATE); + } + + return 0; +} + +static int lan966x_taprio_shutdown(struct lan966x_port *port) +{ + u32 i, list, state; + int err; + + for (i = 0; i < LAN966X_TAPRIO_ENTRIES_PER_PORT; ++i) { + list = lan966x_taprio_list_index(port, i); + state = lan966x_taprio_list_index_state_get(port, list); + if (state == LAN966X_TAPRIO_STATE_ADMIN) + continue; + + err = lan966x_taprio_list_shutdown(port, list); + if (err) + return err; + } + + return 0; +} + +/* Find a suitable list for a new schedule. First priority is a list in state + * pending. Second priority is a list in state admin. + */ +static int lan966x_taprio_find_list(struct lan966x_port *port, + struct tc_taprio_qopt_offload *qopt, + int *new_list, int *obs_list) +{ + int state[LAN966X_TAPRIO_ENTRIES_PER_PORT]; + int list[LAN966X_TAPRIO_ENTRIES_PER_PORT]; + int err, oper = -1; + u32 i; + + *new_list = -1; + *obs_list = -1; + + /* If there is already an entry in operating mode, return this list in + * obs_list, such that when the new list will get activated the + * operating list will be stopped. In this way is possible to have + * smooth transitions between the lists + */ + for (i = 0; i < LAN966X_TAPRIO_ENTRIES_PER_PORT; ++i) { + list[i] = lan966x_taprio_list_index(port, i); + state[i] = lan966x_taprio_list_index_state_get(port, list[i]); + if (state[i] == LAN966X_TAPRIO_STATE_OPERATING) + oper = list[i]; + } + + for (i = 0; i < LAN966X_TAPRIO_ENTRIES_PER_PORT; ++i) { + if (state[i] == LAN966X_TAPRIO_STATE_PENDING) { + err = lan966x_taprio_shutdown(port); + if (err) + return err; + + *new_list = list[i]; + *obs_list = (oper == -1) ? *new_list : oper; + return 0; + } + } + + for (i = 0; i < LAN966X_TAPRIO_ENTRIES_PER_PORT; ++i) { + if (state[i] == LAN966X_TAPRIO_STATE_ADMIN) { + *new_list = list[i]; + *obs_list = (oper == -1) ? *new_list : oper; + return 0; + } + } + + return -ENOSPC; +} + +static int lan966x_taprio_check(struct tc_taprio_qopt_offload *qopt) +{ + u64 total_time = 0; + u32 i; + + /* This is not supported by th HW */ + if (qopt->cycle_time_extension) + return -EOPNOTSUPP; + + /* There is a limited number of gcl entries that can be used, they are + * shared by all ports + */ + if (qopt->num_entries > LAN966X_TAPRIO_NUM_GCL) + return -EINVAL; + + /* Don't allow cycle times bigger than 1 sec or smaller than 1 usec */ + if (qopt->cycle_time < LAN966X_TAPRIO_MIN_CYCLE_TIME_NS || + qopt->cycle_time > LAN966X_TAPRIO_MAX_CYCLE_TIME_NS) + return -EINVAL; + + for (i = 0; i < qopt->num_entries; ++i) { + struct tc_taprio_sched_entry *entry = &qopt->entries[i]; + + /* Don't allow intervals bigger than 1 sec or smaller than 1 + * usec + */ + if (entry->interval < LAN966X_TAPRIO_MIN_CYCLE_TIME_NS || + entry->interval > LAN966X_TAPRIO_MAX_CYCLE_TIME_NS) + return -EINVAL; + + if (qopt->entries[i].command != TC_TAPRIO_CMD_SET_GATES) + return -EINVAL; + + total_time += qopt->entries[i].interval; + } + + /* Don't allow the total time of intervals be bigger than 1 sec */ + if (total_time > LAN966X_TAPRIO_MAX_CYCLE_TIME_NS) + return -EINVAL; + + /* The HW expects that the cycle time to be at least as big as sum of + * each interval of gcl + */ + if (qopt->cycle_time < total_time) + return -EINVAL; + + return 0; +} + +static int lan966x_taprio_gcl_free_get(struct lan966x_port *port, + unsigned long *free_list) +{ + struct lan966x *lan966x = port->lan966x; + u32 num_free, state, list; + u32 base, next, max_list; + + /* By default everything is free */ + bitmap_fill(free_list, LAN966X_TAPRIO_NUM_GCL); + num_free = LAN966X_TAPRIO_NUM_GCL; + + /* Iterate over all gcl entries and find out which are free. And mark + * those that are not free. + */ + max_list = lan966x->num_phys_ports * LAN966X_TAPRIO_ENTRIES_PER_PORT; + for (list = 0; list < max_list; ++list) { + state = lan966x_taprio_list_index_state_get(port, list); + if (state == LAN966X_TAPRIO_STATE_ADMIN) + continue; + + base = lan_rd(lan966x, QSYS_TAS_LIST_CFG); + base = QSYS_TAS_LIST_CFG_LIST_BASE_ADDR_GET(base); + next = base; + + do { + clear_bit(next, free_list); + num_free--; + + lan_rmw(QSYS_TAS_CFG_CTRL_GCL_ENTRY_NUM_SET(next), + QSYS_TAS_CFG_CTRL_GCL_ENTRY_NUM, + lan966x, QSYS_TAS_CFG_CTRL); + + next = lan_rd(lan966x, QSYS_TAS_GCL_CT_CFG2); + next = QSYS_TAS_GCL_CT_CFG2_NEXT_GCL_GET(next); + } while (base != next); + } + + return num_free; +} + +static void lan966x_taprio_gcl_setup_entry(struct lan966x_port *port, + struct tc_taprio_sched_entry *entry, + u32 next_entry) +{ + struct lan966x *lan966x = port->lan966x; + + /* Setup a single gcl entry */ + lan_wr(QSYS_TAS_GCL_CT_CFG_GATE_STATE_SET(entry->gate_mask) | + QSYS_TAS_GCL_CT_CFG_HSCH_POS_SET(port->chip_port) | + QSYS_TAS_GCL_CT_CFG_OP_TYPE_SET(LAN966X_TAPRIO_GCL_CMD_SET_GATE_STATES), + lan966x, QSYS_TAS_GCL_CT_CFG); + + lan_wr(QSYS_TAS_GCL_CT_CFG2_PORT_PROFILE_SET(port->chip_port) | + QSYS_TAS_GCL_CT_CFG2_NEXT_GCL_SET(next_entry), + lan966x, QSYS_TAS_GCL_CT_CFG2); + + lan_wr(entry->interval, lan966x, QSYS_TAS_GCL_TM_CFG); +} + +static int lan966x_taprio_gcl_setup(struct lan966x_port *port, + struct tc_taprio_qopt_offload *qopt, + int list) +{ + DECLARE_BITMAP(free_list, LAN966X_TAPRIO_NUM_GCL); + struct lan966x *lan966x = port->lan966x; + u32 i, base, next; + + if (lan966x_taprio_gcl_free_get(port, free_list) < qopt->num_entries) + return -ENOSPC; + + /* Select list */ + lan_rmw(QSYS_TAS_CFG_CTRL_LIST_NUM_SET(list), + QSYS_TAS_CFG_CTRL_LIST_NUM, + lan966x, QSYS_TAS_CFG_CTRL); + + /* Setup the address of the first gcl entry */ + base = find_first_bit(free_list, LAN966X_TAPRIO_NUM_GCL); + lan_rmw(QSYS_TAS_LIST_CFG_LIST_BASE_ADDR_SET(base), + QSYS_TAS_LIST_CFG_LIST_BASE_ADDR, + lan966x, QSYS_TAS_LIST_CFG); + + /* Iterate over entries and add them to the gcl list */ + next = base; + for (i = 0; i < qopt->num_entries; ++i) { + lan_rmw(QSYS_TAS_CFG_CTRL_GCL_ENTRY_NUM_SET(next), + QSYS_TAS_CFG_CTRL_GCL_ENTRY_NUM, + lan966x, QSYS_TAS_CFG_CTRL); + + /* If the entry is last, point back to the start of the list */ + if (i == qopt->num_entries - 1) + next = base; + else + next = find_next_bit(free_list, LAN966X_TAPRIO_NUM_GCL, + next + 1); + + lan966x_taprio_gcl_setup_entry(port, &qopt->entries[i], next); + } + + return 0; +} + +/* Calculate new base_time based on cycle_time. The HW recommends to have the + * new base time at least 2 * cycle type + current time + */ +static void lan966x_taprio_new_base_time(struct lan966x *lan966x, + const u32 cycle_time, + const ktime_t org_base_time, + ktime_t *new_base_time) +{ + ktime_t current_time, threshold_time; + struct timespec64 ts; + + /* Get the current time and calculate the threshold_time */ + lan966x_ptp_gettime64(&lan966x->phc[LAN966X_PHC_PORT].info, &ts); + current_time = timespec64_to_ktime(ts); + threshold_time = current_time + (2 * cycle_time); + + /* If the org_base_time is in enough in future just use it */ + if (org_base_time >= threshold_time) { + *new_base_time = org_base_time; + return; + } + + /* If the org_base_time is smaller than current_time, calculate the new + * base time as following. + */ + if (org_base_time <= current_time) { + u64 tmp = current_time - org_base_time; + u32 rem; + + if (tmp > cycle_time) + div_u64_rem(tmp, cycle_time, &rem); + rem = cycle_time - rem; + *new_base_time = threshold_time + rem; + return; + } + + /* The only left place for org_base_time is between current_time and + * threshold_time. In this case the new_base_time is calculated like + * org_base_time + 2 * cycletime + */ + *new_base_time = org_base_time + 2 * cycle_time; +} + +int lan966x_taprio_speed_set(struct lan966x_port *port, int speed) +{ + struct lan966x *lan966x = port->lan966x; + u8 taprio_speed; + + switch (speed) { + case SPEED_10: + taprio_speed = LAN966X_TAPRIO_SPEED_10; + break; + case SPEED_100: + taprio_speed = LAN966X_TAPRIO_SPEED_100; + break; + case SPEED_1000: + taprio_speed = LAN966X_TAPRIO_SPEED_1000; + break; + case SPEED_2500: + taprio_speed = LAN966X_TAPRIO_SPEED_2500; + break; + default: + return -EINVAL; + } + + lan_rmw(QSYS_TAS_PROFILE_CFG_LINK_SPEED_SET(taprio_speed), + QSYS_TAS_PROFILE_CFG_LINK_SPEED, + lan966x, QSYS_TAS_PROFILE_CFG(port->chip_port)); + + return 0; +} + +int lan966x_taprio_enable(struct lan966x_port *port, + struct tc_taprio_qopt_offload *qopt) +{ + struct lan966x *lan966x = port->lan966x; + int err, new_list, obs_list; + struct timespec64 ts; + ktime_t base_time; + + err = lan966x_taprio_check(qopt); + if (err) + return err; + + err = lan966x_taprio_find_list(port, qopt, &new_list, &obs_list); + if (err) + return err; + + err = lan966x_taprio_gcl_setup(port, qopt, new_list); + if (err) + return err; + + lan966x_taprio_new_base_time(lan966x, qopt->cycle_time, + qopt->base_time, &base_time); + + ts = ktime_to_timespec64(base_time); + lan_wr(QSYS_TAS_BT_NSEC_NSEC_SET(ts.tv_nsec), + lan966x, QSYS_TAS_BT_NSEC); + + lan_wr(lower_32_bits(ts.tv_sec), + lan966x, QSYS_TAS_BT_SEC_LSB); + + lan_wr(QSYS_TAS_BT_SEC_MSB_SEC_MSB_SET(upper_32_bits(ts.tv_sec)), + lan966x, QSYS_TAS_BT_SEC_MSB); + + lan_wr(qopt->cycle_time, lan966x, QSYS_TAS_CT_CFG); + + lan_rmw(QSYS_TAS_STARTUP_CFG_OBSOLETE_IDX_SET(obs_list), + QSYS_TAS_STARTUP_CFG_OBSOLETE_IDX, + lan966x, QSYS_TAS_STARTUP_CFG); + + /* Start list processing */ + lan_rmw(QSYS_TAS_LST_LIST_STATE_SET(LAN966X_TAPRIO_STATE_ADVANCING), + QSYS_TAS_LST_LIST_STATE, + lan966x, QSYS_TAS_LST); + + return err; +} + +int lan966x_taprio_disable(struct lan966x_port *port) +{ + return lan966x_taprio_shutdown(port); +} + +void lan966x_taprio_init(struct lan966x *lan966x) +{ + int num_taprio_lists; + int p; + + lan_wr(QSYS_TAS_STM_CFG_REVISIT_DLY_SET((256 * 1000) / + lan966x_ptp_get_period_ps()), + lan966x, QSYS_TAS_STM_CFG); + + num_taprio_lists = lan966x->num_phys_ports * + LAN966X_TAPRIO_ENTRIES_PER_PORT; + + /* For now we always use guard band on all queues */ + lan_rmw(QSYS_TAS_CFG_CTRL_LIST_NUM_MAX_SET(num_taprio_lists) | + QSYS_TAS_CFG_CTRL_ALWAYS_GB_SCH_Q_SET(1), + QSYS_TAS_CFG_CTRL_LIST_NUM_MAX | + QSYS_TAS_CFG_CTRL_ALWAYS_GB_SCH_Q, + lan966x, QSYS_TAS_CFG_CTRL); + + for (p = 0; p < lan966x->num_phys_ports; p++) + lan_rmw(QSYS_TAS_PROFILE_CFG_PORT_NUM_SET(p), + QSYS_TAS_PROFILE_CFG_PORT_NUM, + lan966x, QSYS_TAS_PROFILE_CFG(p)); +} + +void lan966x_taprio_deinit(struct lan966x *lan966x) +{ + int p; + + for (p = 0; p < lan966x->num_phys_ports; ++p) { + if (!lan966x->ports[p]) + continue; + + lan966x_taprio_disable(lan966x->ports[p]); + } +} diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c b/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c index 3fea0937076e1..672858dccaf9f 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c @@ -4,6 +4,13 @@ #include "lan966x_main.h" +static int lan966x_tc_setup_qdisc_taprio(struct lan966x_port *port, + struct tc_taprio_qopt_offload *taprio) +{ + return taprio->enable ? lan966x_taprio_enable(port, taprio) : + lan966x_taprio_disable(port); +} + static int lan966x_tc_setup_qdisc_mqprio(struct lan966x_port *port, struct tc_mqprio_qopt_offload *mqprio) { @@ -23,6 +30,8 @@ int lan966x_tc_setup(struct net_device *dev, enum tc_setup_type type, switch (type) { case TC_SETUP_QDISC_MQPRIO: return lan966x_tc_setup_qdisc_mqprio(port, type_data); + case TC_SETUP_QDISC_TAPRIO: + return lan966x_tc_setup_qdisc_taprio(port, type_data); default: return -EOPNOTSUPP; }