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-rw-r--r--Documentation/networking/ethtool-netlink.rst2
-rw-r--r--drivers/net/phy/phy-core.c21
-rw-r--r--drivers/net/phy/phy.c28
-rw-r--r--include/linux/phy.h22
-rw-r--r--include/uapi/linux/ethtool.h18
-rw-r--r--include/uapi/linux/ethtool_netlink.h1
-rw-r--r--net/ethtool/ioctl.c1
-rw-r--r--net/ethtool/linkmodes.c5
8 files changed, 95 insertions, 3 deletions
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index dbca3e9ec782..09fb1d5ba67f 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -426,6 +426,7 @@ Kernel response contents:
``ETHTOOL_A_LINKMODES_DUPLEX`` u8 duplex mode
``ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG`` u8 Master/slave port mode
``ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE`` u8 Master/slave port state
+ ``ETHTOOL_A_LINKMODES_RATE_MATCHING`` u8 PHY rate matching
========================================== ====== ==========================
For ``ETHTOOL_A_LINKMODES_OURS``, value represents advertised modes and mask
@@ -449,6 +450,7 @@ Request contents:
``ETHTOOL_A_LINKMODES_SPEED`` u32 link speed (Mb/s)
``ETHTOOL_A_LINKMODES_DUPLEX`` u8 duplex mode
``ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG`` u8 Master/slave port mode
+ ``ETHTOOL_A_LINKMODES_RATE_MATCHING`` u8 PHY rate matching
``ETHTOOL_A_LINKMODES_LANES`` u32 lanes
========================================== ====== ==========================
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c
index 2a2924bc8f76..2c8bf438ea61 100644
--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -75,6 +75,27 @@ const char *phy_duplex_to_str(unsigned int duplex)
EXPORT_SYMBOL_GPL(phy_duplex_to_str);
/**
+ * phy_rate_matching_to_str - Return a string describing the rate matching
+ *
+ * @rate_matching: Type of rate matching to describe
+ */
+const char *phy_rate_matching_to_str(int rate_matching)
+{
+ switch (rate_matching) {
+ case RATE_MATCH_NONE:
+ return "none";
+ case RATE_MATCH_PAUSE:
+ return "pause";
+ case RATE_MATCH_CRS:
+ return "crs";
+ case RATE_MATCH_OPEN_LOOP:
+ return "open-loop";
+ }
+ return "Unsupported (update phy-core.c)";
+}
+EXPORT_SYMBOL_GPL(phy_rate_matching_to_str);
+
+/**
* phy_interface_num_ports - Return the number of links that can be carried by
* a given MAC-PHY physical link. Returns 0 if this is
* unknown, the number of links else.
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 8d3ee3a6495b..e741d8aebffe 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -115,6 +115,33 @@ void phy_print_status(struct phy_device *phydev)
EXPORT_SYMBOL(phy_print_status);
/**
+ * phy_get_rate_matching - determine if rate matching is supported
+ * @phydev: The phy device to return rate matching for
+ * @iface: The interface mode to use
+ *
+ * This determines the type of rate matching (if any) that @phy supports
+ * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any
+ * interface supports rate matching.
+ *
+ * Return: The type of rate matching @phy supports for @iface, or
+ * %RATE_MATCH_NONE.
+ */
+int phy_get_rate_matching(struct phy_device *phydev,
+ phy_interface_t iface)
+{
+ int ret = RATE_MATCH_NONE;
+
+ if (phydev->drv->get_rate_matching) {
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->get_rate_matching(phydev, iface);
+ mutex_unlock(&phydev->lock);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_get_rate_matching);
+
+/**
* phy_config_interrupt - configure the PHY device for the requested interrupts
* @phydev: the phy_device struct
* @interrupts: interrupt flags to configure for this @phydev
@@ -256,6 +283,7 @@ void phy_ethtool_ksettings_get(struct phy_device *phydev,
cmd->base.duplex = phydev->duplex;
cmd->base.master_slave_cfg = phydev->master_slave_get;
cmd->base.master_slave_state = phydev->master_slave_state;
+ cmd->base.rate_matching = phydev->rate_matching;
if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
cmd->base.port = PORT_BNC;
else
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 337230c135f7..9c66f357f489 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -280,7 +280,6 @@ static inline const char *phy_modes(phy_interface_t interface)
}
}
-
#define PHY_INIT_TIMEOUT 100000
#define PHY_FORCE_TIMEOUT 10
@@ -574,6 +573,7 @@ struct macsec_ops;
* @lp_advertising: Current link partner advertised linkmodes
* @eee_broken_modes: Energy efficient ethernet modes which should be prohibited
* @autoneg: Flag autoneg being used
+ * @rate_matching: Current rate matching mode
* @link: Current link state
* @autoneg_complete: Flag auto negotiation of the link has completed
* @mdix: Current crossover
@@ -641,6 +641,8 @@ struct phy_device {
unsigned irq_suspended:1;
unsigned irq_rerun:1;
+ int rate_matching;
+
enum phy_state state;
u32 dev_flags;
@@ -805,6 +807,21 @@ struct phy_driver {
*/
int (*get_features)(struct phy_device *phydev);
+ /**
+ * @get_rate_matching: Get the supported type of rate matching for a
+ * particular phy interface. This is used by phy consumers to determine
+ * whether to advertise lower-speed modes for that interface. It is
+ * assumed that if a rate matching mode is supported on an interface,
+ * then that interface's rate can be adapted to all slower link speeds
+ * supported by the phy. If iface is %PHY_INTERFACE_MODE_NA, and the phy
+ * supports any kind of rate matching for any interface, then it must
+ * return that rate matching mode (preferring %RATE_MATCH_PAUSE to
+ * %RATE_MATCH_CRS). If the interface is not supported, this should
+ * return %RATE_MATCH_NONE.
+ */
+ int (*get_rate_matching)(struct phy_device *phydev,
+ phy_interface_t iface);
+
/* PHY Power Management */
/** @suspend: Suspend the hardware, saving state if needed */
int (*suspend)(struct phy_device *phydev);
@@ -971,6 +988,7 @@ struct phy_fixup {
const char *phy_speed_to_str(int speed);
const char *phy_duplex_to_str(unsigned int duplex);
+const char *phy_rate_matching_to_str(int rate_matching);
int phy_interface_num_ports(phy_interface_t interface);
@@ -1687,6 +1705,8 @@ int phy_disable_interrupts(struct phy_device *phydev);
void phy_request_interrupt(struct phy_device *phydev);
void phy_free_interrupt(struct phy_device *phydev);
void phy_print_status(struct phy_device *phydev);
+int phy_get_rate_matching(struct phy_device *phydev,
+ phy_interface_t iface);
void phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode);
void phy_advertise_supported(struct phy_device *phydev);
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 2d5741fd44bb..fe9893d1485d 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1840,6 +1840,20 @@ static inline int ethtool_validate_duplex(__u8 duplex)
#define MASTER_SLAVE_STATE_SLAVE 3
#define MASTER_SLAVE_STATE_ERR 4
+/* These are used to throttle the rate of data on the phy interface when the
+ * native speed of the interface is higher than the link speed. These should
+ * not be used for phy interfaces which natively support multiple speeds (e.g.
+ * MII or SGMII).
+ */
+/* No rate matching performed. */
+#define RATE_MATCH_NONE 0
+/* The phy sends pause frames to throttle the MAC. */
+#define RATE_MATCH_PAUSE 1
+/* The phy asserts CRS to prevent the MAC from transmitting. */
+#define RATE_MATCH_CRS 2
+/* The MAC is programmed with a sufficiently-large IPG. */
+#define RATE_MATCH_OPEN_LOOP 3
+
/* Which connector port. */
#define PORT_TP 0x00
#define PORT_AUI 0x01
@@ -2033,8 +2047,8 @@ enum ethtool_reset_flags {
* reported consistently by PHYLIB. Read-only.
* @master_slave_cfg: Master/slave port mode.
* @master_slave_state: Master/slave port state.
+ * @rate_matching: Rate adaptation performed by the PHY
* @reserved: Reserved for future use; see the note on reserved space.
- * @reserved1: Reserved for future use; see the note on reserved space.
* @link_mode_masks: Variable length bitmaps.
*
* If autonegotiation is disabled, the speed and @duplex represent the
@@ -2085,7 +2099,7 @@ struct ethtool_link_settings {
__u8 transceiver;
__u8 master_slave_cfg;
__u8 master_slave_state;
- __u8 reserved1[1];
+ __u8 rate_matching;
__u32 reserved[7];
__u32 link_mode_masks[];
/* layout of link_mode_masks fields:
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index d2fb4f7be61b..408a664fad59 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -242,6 +242,7 @@ enum {
ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG, /* u8 */
ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE, /* u8 */
ETHTOOL_A_LINKMODES_LANES, /* u32 */
+ ETHTOOL_A_LINKMODES_RATE_MATCHING, /* u8 */
/* add new constants above here */
__ETHTOOL_A_LINKMODES_CNT,
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 9298eb3251cb..57e7238a4136 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -571,6 +571,7 @@ static int ethtool_get_link_ksettings(struct net_device *dev,
= __ETHTOOL_LINK_MODE_MASK_NU32;
link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
+ link_ksettings.base.rate_matching = RATE_MATCH_NONE;
return store_link_ksettings_for_user(useraddr, &link_ksettings);
}
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index 99b29b4fe947..126e06c713a3 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -70,6 +70,7 @@ static int linkmodes_reply_size(const struct ethnl_req_info *req_base,
+ nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */
+ nla_total_size(sizeof(u32)) /* LINKMODES_LANES */
+ nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */
+ + nla_total_size(sizeof(u8)) /* LINKMODES_RATE_MATCHING */
+ 0;
ret = ethnl_bitset_size(ksettings->link_modes.advertising,
ksettings->link_modes.supported,
@@ -143,6 +144,10 @@ static int linkmodes_fill_reply(struct sk_buff *skb,
lsettings->master_slave_state))
return -EMSGSIZE;
+ if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_RATE_MATCHING,
+ lsettings->rate_matching))
+ return -EMSGSIZE;
+
return 0;
}
generated by cgit (git 2.34.1) at 2024-05-27 03:45:30 +0000