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target_linux_generic/backport-6.12/612-04-v6.19-net-dsa-b53-provide-accessors-for-accessing-ARL_SRCH_CTL.patch
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From 1716be6db04af53bac9b869f01156a460595cf41 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Fri, 7 Nov 2025 09:07:45 +0100
Subject: [PATCH] net: dsa: b53: provide accessors for accessing ARL_SRCH_CTL
In order to more easily support more formats, move accessing
ARL_SRCH_CTL into helper functions to contain the differences.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20251107080749.26936-5-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/dsa/b53/b53_common.c | 37 +++++++++++++++++++++-----------
1 file changed, 24 insertions(+), 13 deletions(-)
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -2013,18 +2013,37 @@ int b53_fdb_del(struct dsa_switch *ds, i
}
EXPORT_SYMBOL(b53_fdb_del);
-static int b53_arl_search_wait(struct b53_device *dev)
+static void b53_read_arl_srch_ctl(struct b53_device *dev, u8 *val)
{
- unsigned int timeout = 1000;
- u8 reg, offset;
+ u8 offset;
+
+ if (is5325(dev) || is5365(dev))
+ offset = B53_ARL_SRCH_CTL_25;
+ else
+ offset = B53_ARL_SRCH_CTL;
+
+ b53_read8(dev, B53_ARLIO_PAGE, offset, val);
+}
+
+static void b53_write_arl_srch_ctl(struct b53_device *dev, u8 val)
+{
+ u8 offset;
if (is5325(dev) || is5365(dev))
offset = B53_ARL_SRCH_CTL_25;
else
offset = B53_ARL_SRCH_CTL;
+ b53_write8(dev, B53_ARLIO_PAGE, offset, val);
+}
+
+static int b53_arl_search_wait(struct b53_device *dev)
+{
+ unsigned int timeout = 1000;
+ u8 reg;
+
do {
- b53_read8(dev, B53_ARLIO_PAGE, offset, &reg);
+ b53_read_arl_srch_ctl(dev, &reg);
if (!(reg & ARL_SRCH_STDN))
return -ENOENT;
@@ -2082,23 +2101,15 @@ int b53_fdb_dump(struct dsa_switch *ds,
unsigned int count = 0, results_per_hit = 1;
struct b53_device *priv = ds->priv;
struct b53_arl_entry results[2];
- u8 offset;
int ret;
- u8 reg;
if (priv->num_arl_bins > 2)
results_per_hit = 2;
mutex_lock(&priv->arl_mutex);
- if (is5325(priv) || is5365(priv))
- offset = B53_ARL_SRCH_CTL_25;
- else
- offset = B53_ARL_SRCH_CTL;
-
/* Start search operation */
- reg = ARL_SRCH_STDN;
- b53_write8(priv, B53_ARLIO_PAGE, offset, reg);
+ b53_write_arl_srch_ctl(priv, ARL_SRCH_STDN);
do {
ret = b53_arl_search_wait(priv);