ethtool, mdio, mii: Specify MDIO information fields in struct ethtool_cmd

Add comments for ethtool_cmd::phy_address and
ethtool_cmd::mdio_support, and definitions of the flags currently
used in mdio_support.

In the mdio library, assert that its own flags continue to match those
in the ethtool interface.

In the mii library, use the ethtool flag definition and stop
including <linux/mdio.h>.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/mdio.c b/drivers/net/mdio.c
index 16fbb11..8403316 100644 (file)
--- a/drivers/net/mdio.c
+++ b/drivers/net/mdio.c
@@ -190,6 +190,9 @@ void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
        int reg;
        u32 speed;
 
+       BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
+       BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);
+
        ecmd->transceiver = XCVR_INTERNAL;
        ecmd->phy_address = mdio->prtad;
        ecmd->mdio_support =

diff --git a/drivers/net/mii.c b/drivers/net/mii.c
index c70c233..4a99c39 100644 (file)
--- a/drivers/net/mii.c
+++ b/drivers/net/mii.c
@@ -31,7 +31,7 @@
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/ethtool.h>
-#include <linux/mdio.h>
+#include <linux/mii.h>
 
 static u32 mii_get_an(struct mii_if_info *mii, u16 addr)
 {
@@ -74,7 +74,7 @@ int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
 
        /* this isn't fully supported at higher layers */
        ecmd->phy_address = mii->phy_id;
-       ecmd->mdio_support = MDIO_SUPPORTS_C22;
+       ecmd->mdio_support = ETH_MDIO_SUPPORTS_C22;
 
        ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
 

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index da5b2de..e1d9e0e 100644 (file)
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -30,10 +30,15 @@ struct ethtool_cmd {
                                 * access it */
        __u8    duplex;         /* Duplex, half or full */
        __u8    port;           /* Which connector port */
-       __u8    phy_address;
+       __u8    phy_address;    /* MDIO PHY address (PRTAD for clause 45).
+                                * May be read-only or read-write
+                                * depending on the driver.
+                                */
        __u8    transceiver;    /* Which transceiver to use */
        __u8    autoneg;        /* Enable or disable autonegotiation */
-       __u8    mdio_support;
+       __u8    mdio_support;   /* MDIO protocols supported.  Read-only.
+                                * Not set by all drivers.
+                                */
        __u32   maxtxpkt;       /* Tx pkts before generating tx int */
        __u32   maxrxpkt;       /* Rx pkts before generating rx int */
        __u16   speed_hi;       /* The forced speed (upper
@@ -59,6 +64,20 @@ static inline __u32 ethtool_cmd_speed(const struct ethtool_cmd *ep)
        return (ep->speed_hi << 16) | ep->speed;
 }
 
+/* Device supports clause 22 register access to PHY or peripherals
+ * using the interface defined in <linux/mii.h>.  This should not be
+ * set if there are known to be no such peripherals present or if
+ * the driver only emulates clause 22 registers for compatibility.
+ */
+#define ETH_MDIO_SUPPORTS_C22  1
+
+/* Device supports clause 45 register access to PHY or peripherals
+ * using the interface defined in <linux/mii.h> and <linux/mdio.h>.
+ * This should not be set if there are known to be no such peripherals
+ * present.
+ */
+#define ETH_MDIO_SUPPORTS_C45  2
+
 #define ETHTOOL_FWVERS_LEN     32
 #define ETHTOOL_BUSINFO_LEN    32
 /* these strings are set to whatever the driver author decides... */