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Message-Id: <1560893778-6838-5-git-send-email-weifeng.voon@intel.com>
Date: Wed, 19 Jun 2019 05:36:17 +0800
From: Voon Weifeng <weifeng.voon@...el.com>
To: "David S. Miller" <davem@...emloft.net>,
Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Jose Abreu <joabreu@...opsys.com>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Alexandre Torgue <alexandre.torgue@...com>,
Vinicius Costa Gomes <vinicius.gomes@...el.com>,
Ong Boon Leong <boon.leong.ong@...el.com>,
Voon Weifeng <weifeng.voon@...el.com>
Subject: [RFC net-next 4/5] net: stmmac: enable HW offloading for tc taprio
This patch enable iproute2's tc taprio to run IEEE802.1Qbv using HW.
tc taprio manual can refer to:
http://man7.org/linux/man-pages/man8/tc-taprio.8.html
To enable HW offloading, an extra argument need to be added:
offload 1
Example to run:
$ tc qdisc add dev IFACE parent root handle 100 taprio \
num_tc 3 \
map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 \
queues 1@0 1@1 2@2 \
base-time 10000000 \
sched-entry S 03 300000 \
sched-entry S 02 300000 \
sched-entry S 06 400000 \
clockid CLOCK_TAI
offload 1
Signed-off-by: Voon Weifeng <weifeng.voon@...el.com>
---
drivers/net/ethernet/stmicro/stmmac/hwif.h | 5 ++
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +
drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 96 +++++++++++++++++++++++
3 files changed, 103 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index dec9b1f5c557..c9fa60934710 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -514,6 +514,7 @@ struct stmmac_mode_ops {
struct stmmac_priv;
struct tc_cls_u32_offload;
struct tc_cbs_qopt_offload;
+struct tc_taprio_qopt_offload;
struct stmmac_tc_ops {
int (*init)(struct stmmac_priv *priv);
@@ -521,6 +522,8 @@ struct stmmac_tc_ops {
struct tc_cls_u32_offload *cls);
int (*setup_cbs)(struct stmmac_priv *priv,
struct tc_cbs_qopt_offload *qopt);
+ int (*setup_taprio)(struct stmmac_priv *priv,
+ struct tc_taprio_qopt_offload *qopt);
};
#define stmmac_tc_init(__priv, __args...) \
@@ -529,6 +532,8 @@ struct stmmac_tc_ops {
stmmac_do_callback(__priv, tc, setup_cls_u32, __args)
#define stmmac_tc_setup_cbs(__priv, __args...) \
stmmac_do_callback(__priv, tc, setup_cbs, __args)
+#define stmmac_tc_setup_taprio(__priv, __args...) \
+ stmmac_do_callback(__priv, tc, setup_taprio, __args)
struct stmmac_counters;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c28b5e69f2cd..a443c42fa58b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3811,6 +3811,8 @@ static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
return stmmac_setup_tc_block(priv, type_data);
case TC_SETUP_QDISC_CBS:
return stmmac_tc_setup_cbs(priv, priv, type_data);
+ case TC_SETUP_QDISC_TAPRIO:
+ return stmmac_tc_setup_taprio(priv, priv, type_data);
default:
return -EOPNOTSUPP;
}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 58ea18af9813..d118e3636d50 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -7,10 +7,13 @@
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include "common.h"
+#include "dw_tsn_lib.h"
#include "dwmac4.h"
#include "dwmac5.h"
#include "stmmac.h"
+#define ONE_SEC_IN_NANOSEC 1000000000ULL
+
static void tc_fill_all_pass_entry(struct stmmac_tc_entry *entry)
{
memset(entry, 0, sizeof(*entry));
@@ -349,8 +352,101 @@ static int tc_setup_cbs(struct stmmac_priv *priv,
return 0;
}
+static int tc_setup_taprio(struct stmmac_priv *priv,
+ struct tc_taprio_qopt_offload *qopt)
+{
+ u64 time_extension = qopt->cycle_time_extension;
+ u64 base_time = ktime_to_ns(qopt->base_time);
+ u64 cycle_time = qopt->cycle_time;
+ struct est_gcrr egcrr;
+ u32 extension_ns;
+ u32 extension_s;
+ u32 cycle_ns;
+ u32 cycle_s;
+ u32 base_ns;
+ u32 base_s;
+ int ret;
+ int i;
+
+ if (qopt->enable) {
+ stmmac_set_est_enable(priv, priv->ioaddr, 1);
+ dev_info(priv->device, "taprio: EST enabled\n");
+ } else {
+ stmmac_set_est_enable(priv, priv->ioaddr, 0);
+ dev_info(priv->device, "taprio: EST disabled\n");
+ return 0;
+ }
+
+ dev_dbg(priv->device, "taprio: time_extension %lld, base_time %lld, cycle_time %lld\n",
+ qopt->cycle_time_extension, qopt->base_time, qopt->cycle_time);
+
+ for (i = 0; i < qopt->num_entries; i++) {
+ struct est_gc_entry sgce;
+
+ sgce.gates = qopt->entries[i].gate_mask;
+ sgce.ti_nsec = qopt->entries[i].interval;
+
+ /* cycle_time will be sum of all time interval
+ * of the entries in the schedule if the
+ * cycle_time is not provided
+ */
+ if (!qopt->cycle_time)
+ cycle_time += qopt->entries[i].interval;
+
+ dev_dbg(priv->device, "taprio: gates 0x%x, ti_ns %d, cycle_ns %d\n",
+ sgce.gates, sgce.ti_nsec, cycle_ns);
+
+ ret = stmmac_set_est_gce(priv, priv->ioaddr, &sgce, i, 0, 0);
+
+ if (ret) {
+ dev_err(priv->device,
+ "taprio: fail to program GC entry(%d).\n", i);
+
+ return ret;
+ }
+ }
+
+ ret = stmmac_set_est_gcrr_llr(priv, priv->ioaddr,
+ qopt->num_entries,
+ 0, 0);
+ if (ret) {
+ dev_err(priv->device,
+ "taprio: fail to program GC into HW\n");
+ }
+
+ /* set est_info */
+ base_ns = do_div(base_time, ONE_SEC_IN_NANOSEC);
+ base_s = base_time;
+ dev_dbg(priv->device, "taprio: base_s %d, base_ns %d\n",
+ base_s, base_ns);
+
+ cycle_ns = do_div(cycle_time, ONE_SEC_IN_NANOSEC);
+ cycle_s = cycle_time;
+ dev_dbg(priv->device, "taprio: cycle_s %d, cycle_ns %d\n",
+ cycle_s, cycle_ns);
+
+ extension_ns = do_div(time_extension, ONE_SEC_IN_NANOSEC);
+ extension_s = time_extension;
+ dev_dbg(priv->device, "taprio: extension_s %d, extension_ns %d\n",
+ extension_s, extension_ns);
+
+ if (extension_s) {
+ dev_err(priv->device, "taprio: extension in seconds not supported.\n");
+ return -EINVAL;
+ }
+
+ egcrr.cycle_sec = cycle_s;
+ egcrr.cycle_nsec = cycle_ns;
+ egcrr.base_sec = base_s;
+ egcrr.base_nsec = base_ns;
+ egcrr.ter_nsec = extension_ns;
+
+ return stmmac_set_est_gcrr_times(priv, priv->ioaddr, &egcrr, 0, 0);
+}
+
const struct stmmac_tc_ops dwmac510_tc_ops = {
.init = tc_init,
.setup_cls_u32 = tc_setup_cls_u32,
.setup_cbs = tc_setup_cbs,
+ .setup_taprio = tc_setup_taprio,
};
--
1.9.1
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