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Date: Wed, 28 Sep 2022 12:52:01 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Xiaoliang Yang <xiaoliang.yang_1@....com>,
Rui Sousa <rui.sousa@....com>,
Claudiu Manoil <claudiu.manoil@....com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
UNGLinuxDriver@...rochip.com,
Horatiu Vultur <horatiu.vultur@...rochip.com>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Michael Walle <michael@...le.cc>,
Vinicius Costa Gomes <vinicius.gomes@...el.com>,
Maxim Kochetkov <fido_max@...ox.ru>,
Colin Foster <colin.foster@...advantage.com>,
Richie Pearn <richard.pearn@....com>,
Kurt Kanzenbach <kurt@...utronix.de>,
Vladimir Oltean <olteanv@...il.com>,
Jamal Hadi Salim <jhs@...atatu.com>,
Cong Wang <xiyou.wangcong@...il.com>,
Jiri Pirko <jiri@...nulli.us>, linux-kernel@...r.kernel.org
Subject: [PATCH v4 net-next 5/8] net: dsa: hellcreek: Offload per-tc max SDU from tc-taprio
From: Kurt Kanzenbach <kurt@...utronix.de>
Add support for configuring the max SDU per priority and per port. If not
specified, keep the default.
Signed-off-by: Kurt Kanzenbach <kurt@...utronix.de>
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
v2->v3:
- implement TC_QUERY_CAPS for TC_SETUP_QDISC_TAPRIO
v3->v4:
- fix broken patch splitting
- fix bogus fall-through in hellcreek_tc_query_caps()
drivers/net/dsa/hirschmann/hellcreek.c | 76 +++++++++++++++++++++++++-
drivers/net/dsa/hirschmann/hellcreek.h | 7 +++
2 files changed, 81 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 19e61d4112b3..951f7935c872 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -128,6 +128,16 @@ static void hellcreek_select_prio(struct hellcreek *hellcreek, int prio)
hellcreek_write(hellcreek, val, HR_PSEL);
}
+static void hellcreek_select_port_prio(struct hellcreek *hellcreek, int port,
+ int prio)
+{
+ u16 val = port << HR_PSEL_PTWSEL_SHIFT;
+
+ val |= prio << HR_PSEL_PRTCWSEL_SHIFT;
+
+ hellcreek_write(hellcreek, val, HR_PSEL);
+}
+
static void hellcreek_select_counter(struct hellcreek *hellcreek, int counter)
{
u16 val = counter << HR_CSEL_SHIFT;
@@ -1537,6 +1547,45 @@ hellcreek_port_prechangeupper(struct dsa_switch *ds, int port,
return ret;
}
+static void hellcreek_setup_maxsdu(struct hellcreek *hellcreek, int port,
+ const struct tc_taprio_qopt_offload *schedule)
+{
+ int tc;
+
+ for (tc = 0; tc < 8; ++tc) {
+ u32 max_sdu = schedule->max_sdu[tc] + VLAN_ETH_HLEN - ETH_FCS_LEN;
+ u16 val;
+
+ if (!schedule->max_sdu[tc])
+ continue;
+
+ dev_dbg(hellcreek->dev, "Configure max-sdu %u for tc %d on port %d\n",
+ max_sdu, tc, port);
+
+ hellcreek_select_port_prio(hellcreek, port, tc);
+
+ val = (max_sdu & HR_PTPRTCCFG_MAXSDU_MASK) << HR_PTPRTCCFG_MAXSDU_SHIFT;
+
+ hellcreek_write(hellcreek, val, HR_PTPRTCCFG);
+ }
+}
+
+static void hellcreek_reset_maxsdu(struct hellcreek *hellcreek, int port)
+{
+ int tc;
+
+ for (tc = 0; tc < 8; ++tc) {
+ u16 val;
+
+ hellcreek_select_port_prio(hellcreek, port, tc);
+
+ val = (HELLCREEK_DEFAULT_MAX_SDU & HR_PTPRTCCFG_MAXSDU_MASK)
+ << HR_PTPRTCCFG_MAXSDU_SHIFT;
+
+ hellcreek_write(hellcreek, val, HR_PTPRTCCFG);
+ }
+}
+
static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port,
const struct tc_taprio_qopt_offload *schedule)
{
@@ -1720,7 +1769,10 @@ static int hellcreek_port_set_schedule(struct dsa_switch *ds, int port,
}
hellcreek_port->current_schedule = taprio_offload_get(taprio);
- /* Then select port */
+ /* Configure max sdu */
+ hellcreek_setup_maxsdu(hellcreek, port, hellcreek_port->current_schedule);
+
+ /* Select tdg */
hellcreek_select_tgd(hellcreek, port);
/* Enable gating and keep defaults */
@@ -1772,7 +1824,10 @@ static int hellcreek_port_del_schedule(struct dsa_switch *ds, int port)
hellcreek_port->current_schedule = NULL;
}
- /* Then select port */
+ /* Reset max sdu */
+ hellcreek_reset_maxsdu(hellcreek, port);
+
+ /* Select tgd */
hellcreek_select_tgd(hellcreek, port);
/* Disable gating and return to regular switching flow */
@@ -1809,12 +1864,29 @@ static bool hellcreek_validate_schedule(struct hellcreek *hellcreek,
return true;
}
+static int hellcreek_tc_query_caps(struct tc_query_caps_base *base)
+{
+ switch (base->type) {
+ case TC_SETUP_QDISC_TAPRIO: {
+ struct tc_taprio_caps *caps = base->caps;
+
+ caps->supports_queue_max_sdu = true;
+
+ return 0;
+ }
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
static int hellcreek_port_setup_tc(struct dsa_switch *ds, int port,
enum tc_setup_type type, void *type_data)
{
struct hellcreek *hellcreek = ds->priv;
switch (type) {
+ case TC_QUERY_CAPS:
+ return hellcreek_tc_query_caps(type_data);
case TC_SETUP_QDISC_TAPRIO: {
struct tc_taprio_qopt_offload *taprio = type_data;
diff --git a/drivers/net/dsa/hirschmann/hellcreek.h b/drivers/net/dsa/hirschmann/hellcreek.h
index 9e303b8ab13c..4a678f7d61ae 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.h
+++ b/drivers/net/dsa/hirschmann/hellcreek.h
@@ -37,6 +37,7 @@
#define HELLCREEK_VLAN_UNTAGGED_MEMBER 0x1
#define HELLCREEK_VLAN_TAGGED_MEMBER 0x3
#define HELLCREEK_NUM_EGRESS_QUEUES 8
+#define HELLCREEK_DEFAULT_MAX_SDU 1536
/* Register definitions */
#define HR_MODID_C (0 * 2)
@@ -72,6 +73,12 @@
#define HR_PRTCCFG_PCP_TC_MAP_SHIFT 0
#define HR_PRTCCFG_PCP_TC_MAP_MASK GENMASK(2, 0)
+#define HR_PTPRTCCFG (0xa9 * 2)
+#define HR_PTPRTCCFG_SET_QTRACK BIT(15)
+#define HR_PTPRTCCFG_REJECT BIT(14)
+#define HR_PTPRTCCFG_MAXSDU_SHIFT 0
+#define HR_PTPRTCCFG_MAXSDU_MASK GENMASK(10, 0)
+
#define HR_CSEL (0x8d * 2)
#define HR_CSEL_SHIFT 0
#define HR_CSEL_MASK GENMASK(7, 0)
--
2.34.1
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