diff mbox series

[v2,net-next,09/12] net: dsa: hellcreek: Offload per-tc max SDU from tc-taprio

Message ID 20220923163310.3192733-10-vladimir.oltean@nxp.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Add tc-taprio support for queueMaxSDU | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 10 of 10 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns WARNING: line length of 82 exceeds 80 columns WARNING: line length of 88 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Vladimir Oltean Sept. 23, 2022, 4:33 p.m. UTC 
From: Kurt Kanzenbach <kurt@linutronix.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@linutronix.de>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
v1->v2: replace my patch that rejects custom queueMaxSDU values with
Kurt's patch that acts upon them

 drivers/net/dsa/hirschmann/hellcreek.c | 59 +++++++++++++++++++++++++-
 drivers/net/dsa/hirschmann/hellcreek.h |  7 +++
 2 files changed, 64 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index eac6ace7c5f9..ed0bdf0ea6bf 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 */
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)