diff mbox series

[v2,10/25] net/axgbe: check only the minimum speed for cables

Message ID 20240507124305.2318-10-venkatkumar.ande@amd.com (mailing list archive)
State Changes Requested, archived
Delegated to: Ferruh Yigit
Headers
Series [v2,01/25] net/axgbe: fix mdio access for non-zero ports and CL45 PHYs |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Venkat Kumar Ande May 7, 2024, 12:42 p.m. UTC 
There are cables that exist that can support speeds in excess of 10GbE.
The driver, however, restricts the EEPROM advertised nominal bitrate to
a specific range, which can prevent usage of cables that can support,
for example, up to 25GbE.

Rather than checking that an active or passive cable supports a specific
range, only check for a minimum supported speed.

Fixes: a5c7273771e8 ("net/axgbe: add phy programming APIs")
Cc: stable@dpdk.org

Signed-off-by: Venkat Kumar Ande <venkatkumar.ande@amd.com>
---
 drivers/net/axgbe/axgbe_phy_impl.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

Comments

Sebastian, Selwin May 20, 2024, 10:42 a.m. UTC | #1 
[AMD Official Use Only - AMD Internal Distribution Only]

Acked-by: Selwin Sebastian<selwin.sebastian@amd.com>

-----Original Message-----
From: Ande, Venkat Kumar <VenkatKumar.Ande@amd.com>
Sent: Tuesday, May 7, 2024 6:13 PM
To: dev@dpdk.org
Cc: Sebastian, Selwin <Selwin.Sebastian@amd.com>; Ande, Venkat Kumar <VenkatKumar.Ande@amd.com>; stable@dpdk.org
Subject: [PATCH v2 10/25] net/axgbe: check only the minimum speed for cables

There are cables that exist that can support speeds in excess of 10GbE.
The driver, however, restricts the EEPROM advertised nominal bitrate to a specific range, which can prevent usage of cables that can support, for example, up to 25GbE.

Rather than checking that an active or passive cable supports a specific range, only check for a minimum supported speed.

Fixes: a5c7273771e8 ("net/axgbe: add phy programming APIs")
Cc: stable@dpdk.org

Signed-off-by: Venkat Kumar Ande <venkatkumar.ande@amd.com>
---
 drivers/net/axgbe/axgbe_phy_impl.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/axgbe/axgbe_phy_impl.c b/drivers/net/axgbe/axgbe_phy_impl.c
index 8b66def631..0ad5b4ba85 100644
--- a/drivers/net/axgbe/axgbe_phy_impl.c
+++ b/drivers/net/axgbe/axgbe_phy_impl.c
@@ -117,9 +117,7 @@ enum axgbe_sfp_speed {

 #define AXGBE_SFP_BASE_BR                      12
 #define AXGBE_SFP_BASE_BR_1GBE_MIN             0x0a
-#define AXGBE_SFP_BASE_BR_1GBE_MAX             0x0d
 #define AXGBE_SFP_BASE_BR_10GBE_MIN            0x64
-#define AXGBE_SFP_BASE_BR_10GBE_MAX            0x68

 #define AXGBE_SFP_BASE_CU_CABLE_LEN            18

@@ -536,25 +534,22 @@ static void axgbe_phy_sfp_phy_settings(struct axgbe_port *pdata)  static bool axgbe_phy_sfp_bit_rate(struct axgbe_sfp_eeprom *sfp_eeprom,
                                   enum axgbe_sfp_speed sfp_speed)
 {
-       u8 *sfp_base, min, max;
+       u8 *sfp_base, min;

        sfp_base = sfp_eeprom->base;

        switch (sfp_speed) {
        case AXGBE_SFP_SPEED_1000:
                min = AXGBE_SFP_BASE_BR_1GBE_MIN;
-               max = AXGBE_SFP_BASE_BR_1GBE_MAX;
                break;
        case AXGBE_SFP_SPEED_10000:
                min = AXGBE_SFP_BASE_BR_10GBE_MIN;
-               max = AXGBE_SFP_BASE_BR_10GBE_MAX;
                break;
        default:
                return false;
        }

-       return ((sfp_base[AXGBE_SFP_BASE_BR] >= min) &&
-               (sfp_base[AXGBE_SFP_BASE_BR] <= max));
+       return sfp_base[AXGBE_SFP_BASE_BR] >= min;
 }

 static void axgbe_phy_sfp_external_phy(struct axgbe_port *pdata)
--
2.34.1
diff mbox series

Patch

diff --git a/drivers/net/axgbe/axgbe_phy_impl.c b/drivers/net/axgbe/axgbe_phy_impl.c
index 8b66def631..0ad5b4ba85 100644
--- a/drivers/net/axgbe/axgbe_phy_impl.c
+++ b/drivers/net/axgbe/axgbe_phy_impl.c
@@ -117,9 +117,7 @@  enum axgbe_sfp_speed {
 
 #define AXGBE_SFP_BASE_BR			12
 #define AXGBE_SFP_BASE_BR_1GBE_MIN		0x0a
-#define AXGBE_SFP_BASE_BR_1GBE_MAX		0x0d
 #define AXGBE_SFP_BASE_BR_10GBE_MIN		0x64
-#define AXGBE_SFP_BASE_BR_10GBE_MAX		0x68
 
 #define AXGBE_SFP_BASE_CU_CABLE_LEN		18
 
@@ -536,25 +534,22 @@  static void axgbe_phy_sfp_phy_settings(struct axgbe_port *pdata)
 static bool axgbe_phy_sfp_bit_rate(struct axgbe_sfp_eeprom *sfp_eeprom,
 				   enum axgbe_sfp_speed sfp_speed)
 {
-	u8 *sfp_base, min, max;
+	u8 *sfp_base, min;
 
 	sfp_base = sfp_eeprom->base;
 
 	switch (sfp_speed) {
 	case AXGBE_SFP_SPEED_1000:
 		min = AXGBE_SFP_BASE_BR_1GBE_MIN;
-		max = AXGBE_SFP_BASE_BR_1GBE_MAX;
 		break;
 	case AXGBE_SFP_SPEED_10000:
 		min = AXGBE_SFP_BASE_BR_10GBE_MIN;
-		max = AXGBE_SFP_BASE_BR_10GBE_MAX;
 		break;
 	default:
 		return false;
 	}
 
-	return ((sfp_base[AXGBE_SFP_BASE_BR] >= min) &&
-		(sfp_base[AXGBE_SFP_BASE_BR] <= max));
+	return sfp_base[AXGBE_SFP_BASE_BR] >= min;
 }
 
 static void axgbe_phy_sfp_external_phy(struct axgbe_port *pdata)