linux-kernel - [PATCH net-next v5 03/13] net: phy: phy_caps: Move phy_speeds to phy

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Message-ID: <20250307173611.129125-4-maxime.chevallier@bootlin.com>
Date: Fri,  7 Mar 2025 18:36:00 +0100
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: davem@...emloft.net,
	Andrew Lunn <andrew@...n.ch>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	thomas.petazzoni@...tlin.com,
	linux-arm-kernel@...ts.infradead.org,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Herve Codina <herve.codina@...tlin.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Köry Maincent <kory.maincent@...tlin.com>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Simon Horman <horms@...nel.org>,
	Romain Gantois <romain.gantois@...tlin.com>
Subject: [PATCH net-next v5 03/13] net: phy: phy_caps: Move phy_speeds to phy_caps

Use the newly introduced link_capabilities array to derive the list of
possible speeds when given a combination of linkmodes. As
link_capabilities is indexed by speed, we don't have to iterate the
whole phy_settings array.

Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
---
 drivers/net/phy/phy-caps.h |  3 +++
 drivers/net/phy/phy-core.c | 15 ---------------
 drivers/net/phy/phy.c      |  3 ++-
 drivers/net/phy/phy_caps.c | 33 +++++++++++++++++++++++++++++++++
 include/linux/phy.h        |  2 --
 5 files changed, 38 insertions(+), 18 deletions(-)

diff --git a/drivers/net/phy/phy-caps.h b/drivers/net/phy/phy-caps.h
index 6024f1d11a93..5a5f4ee3006b 100644
--- a/drivers/net/phy/phy-caps.h
+++ b/drivers/net/phy/phy-caps.h
@@ -40,4 +40,7 @@ struct link_capabilities {
 
 int phy_caps_init(void);
 
+size_t phy_caps_speeds(unsigned int *speeds, size_t size,
+		       unsigned long *linkmodes);
+
 #endif /* __PHY_CAPS_H */
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c
index 154d29be6293..542e9284d207 100644
--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -340,21 +340,6 @@ phy_lookup_setting(int speed, int duplex, const unsigned long *mask, bool exact)
 }
 EXPORT_SYMBOL_GPL(phy_lookup_setting);
 
-size_t phy_speeds(unsigned int *speeds, size_t size,
-		  unsigned long *mask)
-{
-	size_t count;
-	int i;
-
-	for (i = 0, count = 0; i < ARRAY_SIZE(settings) && count < size; i++)
-		if (settings[i].bit < __ETHTOOL_LINK_MODE_MASK_NBITS &&
-		    test_bit(settings[i].bit, mask) &&
-		    (count == 0 || speeds[count - 1] != settings[i].speed))
-			speeds[count++] = settings[i].speed;
-
-	return count;
-}
-
 static void __set_linkmode_max_speed(u32 max_speed, unsigned long *addr)
 {
 	const struct phy_setting *p;
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 16ffc00b419c..3128df03feda 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -37,6 +37,7 @@
 #include <net/sock.h>
 
 #include "phylib-internal.h"
+#include "phy-caps.h"
 
 #define PHY_STATE_TIME	HZ
 
@@ -245,7 +246,7 @@ unsigned int phy_supported_speeds(struct phy_device *phy,
 				  unsigned int *speeds,
 				  unsigned int size)
 {
-	return phy_speeds(speeds, size, phy->supported);
+	return phy_caps_speeds(speeds, size, phy->supported);
 }
 
 /**
diff --git a/drivers/net/phy/phy_caps.c b/drivers/net/phy/phy_caps.c
index 6cb18e216d97..8ce91257160f 100644
--- a/drivers/net/phy/phy_caps.c
+++ b/drivers/net/phy/phy_caps.c
@@ -57,6 +57,9 @@ static int speed_duplex_to_capa(int speed, unsigned int duplex)
 	return -EINVAL;
 }
 
+#define for_each_link_caps_asc_speed(cap) \
+	for (cap = link_caps; cap < &link_caps[__LINK_CAPA_MAX]; cap++)
+
 /**
  * phy_caps_init() - Initializes the link_caps array from the link_mode_params.
  *
@@ -88,3 +91,33 @@ int phy_caps_init(void)
 
 	return 0;
 }
+
+/**
+ * phy_caps_speeds() - Fill an array of supported SPEED_* values for given modes
+ * @speeds: Output array to store the speeds list into
+ * @size: Size of the output array
+ * @linkmodes: Linkmodes to get the speeds from
+ *
+ * Fills the speeds array with all possible speeds that can be achieved with
+ * the specified linkmodes.
+ *
+ * Returns: The number of speeds filled into the array. If the input array isn't
+ *	    big enough to store all speeds, fill it as much as possible.
+ */
+size_t phy_caps_speeds(unsigned int *speeds, size_t size,
+		       unsigned long *linkmodes)
+{
+	struct link_capabilities *lcap;
+	size_t count = 0;
+
+	for_each_link_caps_asc_speed(lcap) {
+		if (linkmode_intersects(lcap->linkmodes, linkmodes) &&
+		    (count == 0 || speeds[count - 1] != lcap->speed)) {
+			speeds[count++] = lcap->speed;
+			if (count >= size)
+				break;
+		}
+	}
+
+	return count;
+}
diff --git a/include/linux/phy.h b/include/linux/phy.h
index c4a6385faf41..99c195fa3695 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1287,8 +1287,6 @@ struct phy_setting {
 const struct phy_setting *
 phy_lookup_setting(int speed, int duplex, const unsigned long *mask,
 		   bool exact);
-size_t phy_speeds(unsigned int *speeds, size_t size,
-		  unsigned long *mask);
 
 /**
  * phy_is_started - Convenience function to check whether PHY is started
-- 
2.48.1