bnx2x: MDC/MDIO CL45 IOCTLs

As suggested by Ben Hutchings <bhutchings@solarflare.com>, using the MDC/MDIO
IOCTL

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 88 insertions, 37 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 9948fa23222..29935a9fb1a 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2722,6 +2722,7 @@ config BNX2X
         select FW_LOADER
         select ZLIB_INFLATE
         select LIBCRC32C
+        select MDIO
         help
           This driver supports Broadcom NetXtremeII 10 gigabit Ethernet cards.
           To compile this driver as a module, choose M here: the module
diff --git a/drivers/net/bnx2x.h b/drivers/net/bnx2x.h
index 5864ae2faab..903c89d8518 100644
--- a/drivers/net/bnx2x.h
+++ b/drivers/net/bnx2x.h
@@ -30,6 +30,8 @@
 #define BNX2X_NEW_NAPI
 
 
+
+#include <linux/mdio.h>
 #include "bnx2x_reg.h"
 #include "bnx2x_fw_defs.h"
 #include "bnx2x_hsi.h"
@@ -895,6 +897,7 @@ struct bnx2x {
 
         struct link_params      link_params;
         struct link_vars        link_vars;
+        struct mdio_if_info     mdio;
 
         struct bnx2x_common     common;
         struct bnx2x_port       port;
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index a695e7f0647..145866764d4 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -8331,6 +8331,7 @@ static void __devinit bnx2x_get_port_hwinfo(struct bnx2x *bp)
         u32 val, val2;
         u32 config;
         u16 i;
+        u32 ext_phy_type;
 
         bp->link_params.bp = bp;
         bp->link_params.port = port;
@@ -8390,6 +8391,21 @@ static void __devinit bnx2x_get_port_hwinfo(struct bnx2x *bp)
 
         bnx2x_link_settings_requested(bp);
 
+        /*
+         * If connected directly, work with the internal PHY, otherwise, work
+         * with the external PHY
+         */
+        ext_phy_type = XGXS_EXT_PHY_TYPE(bp->link_params.ext_phy_config);
+        if (ext_phy_type == PORT_HW_CFG_XGXS_EXT_PHY_TYPE_DIRECT)
+                bp->mdio.prtad = bp->link_params.phy_addr;
+
+        else if ((ext_phy_type != PORT_HW_CFG_XGXS_EXT_PHY_TYPE_FAILURE) &&
+                 (ext_phy_type != PORT_HW_CFG_XGXS_EXT_PHY_TYPE_NOT_CONN))
+                bp->mdio.prtad =
+                        (bp->link_params.ext_phy_config &
+                         PORT_HW_CFG_XGXS_EXT_PHY_ADDR_MASK) >>
+                                PORT_HW_CFG_XGXS_EXT_PHY_ADDR_SHIFT;
+
         val2 = SHMEM_RD(bp, dev_info.port_hw_config[port].mac_upper);
         val = SHMEM_RD(bp, dev_info.port_hw_config[port].mac_lower);
         bp->dev->dev_addr[0] = (u8)(val2 >> 8 & 0xff);
@@ -8614,7 +8630,7 @@ static int bnx2x_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
         } else
                 cmd->port = PORT_TP;
 
-        cmd->phy_address = bp->port.phy_addr;
+        cmd->phy_address = bp->mdio.prtad;
         cmd->transceiver = XCVR_INTERNAL;
 
         if (bp->link_params.req_line_speed == SPEED_AUTO_NEG)
@@ -11149,54 +11165,77 @@ static int bnx2x_change_mac_addr(struct net_device *dev, void *p)
 }
 
 /* called with rtnl_lock */
-static int bnx2x_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+static int bnx2x_mdio_read(struct net_device *netdev, int prtad,
+                           int devad, u16 addr)
 {
-        struct mii_ioctl_data *data = if_mii(ifr);
-        struct bnx2x *bp = netdev_priv(dev);
-        int port = BP_PORT(bp);
-        int err;
+        struct bnx2x *bp = netdev_priv(netdev);
+        u16 value;
+        int rc;
+        u32 phy_type = XGXS_EXT_PHY_TYPE(bp->link_params.ext_phy_config);
 
-        switch (cmd) {
-        case SIOCGMIIPHY:
-                data->phy_id = bp->port.phy_addr;
+        DP(NETIF_MSG_LINK, "mdio_read: prtad 0x%x, devad 0x%x, addr 0x%x\n",
+           prtad, devad, addr);
 
-                /* fallthrough */
+        if (prtad != bp->mdio.prtad) {
+                DP(NETIF_MSG_LINK, "prtad missmatch (cmd:0x%x != bp:0x%x)\n",
+                   prtad, bp->mdio.prtad);
+                return -EINVAL;
+        }
+
+        /* The HW expects different devad if CL22 is used */
+        devad = (devad == MDIO_DEVAD_NONE) ? DEFAULT_PHY_DEV_ADDR : devad;
 
-        case SIOCGMIIREG: {
-                u16 mii_regval;
+        bnx2x_acquire_phy_lock(bp);
+        rc = bnx2x_cl45_read(bp, BP_PORT(bp), phy_type, prtad,
+                             devad, addr, &value);
+        bnx2x_release_phy_lock(bp);
+        DP(NETIF_MSG_LINK, "mdio_read_val 0x%x rc = 0x%x\n", value, rc);
 
-                if (!netif_running(dev))
-                        return -EAGAIN;
+        if (!rc)
+                rc = value;
+        return rc;
+}
 
-                mutex_lock(&bp->port.phy_mutex);
-                err = bnx2x_cl45_read(bp, port, 0, bp->port.phy_addr,
-                                      DEFAULT_PHY_DEV_ADDR,
-                                      (data->reg_num & 0x1f), &mii_regval);
-                data->val_out = mii_regval;
-                mutex_unlock(&bp->port.phy_mutex);
-                return err;
+/* called with rtnl_lock */
+static int bnx2x_mdio_write(struct net_device *netdev, int prtad, int devad,
+                            u16 addr, u16 value)
+{
+        struct bnx2x *bp = netdev_priv(netdev);
+        u32 ext_phy_type = XGXS_EXT_PHY_TYPE(bp->link_params.ext_phy_config);
+        int rc;
+
+        DP(NETIF_MSG_LINK, "mdio_write: prtad 0x%x, devad 0x%x, addr 0x%x,"
+                           " value 0x%x\n", prtad, devad, addr, value);
+
+        if (prtad != bp->mdio.prtad) {
+                DP(NETIF_MSG_LINK, "prtad missmatch (cmd:0x%x != bp:0x%x)\n",
+                   prtad, bp->mdio.prtad);
+                return -EINVAL;
         }
 
-        case SIOCSMIIREG:
-                if (!capable(CAP_NET_ADMIN))
-                        return -EPERM;
+        /* The HW expects different devad if CL22 is used */
+        devad = (devad == MDIO_DEVAD_NONE) ? DEFAULT_PHY_DEV_ADDR : devad;
 
-                if (!netif_running(dev))
-                        return -EAGAIN;
+        bnx2x_acquire_phy_lock(bp);
+        rc = bnx2x_cl45_write(bp, BP_PORT(bp), ext_phy_type, prtad,
+                              devad, addr, value);
+        bnx2x_release_phy_lock(bp);
+        return rc;
+}
 
-                mutex_lock(&bp->port.phy_mutex);
-                err = bnx2x_cl45_write(bp, port, 0, bp->port.phy_addr,
-                                       DEFAULT_PHY_DEV_ADDR,
-                                       (data->reg_num & 0x1f), data->val_in);
-                mutex_unlock(&bp->port.phy_mutex);
-                return err;
+/* called with rtnl_lock */
+static int bnx2x_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+        struct bnx2x *bp = netdev_priv(dev);
+        struct mii_ioctl_data *mdio = if_mii(ifr);
 
-        default:
-                /* do nothing */
-                break;
-        }
+        DP(NETIF_MSG_LINK, "ioctl: phy id 0x%x, reg 0x%x, val_in 0x%x\n",
+           mdio->phy_id, mdio->reg_num, mdio->val_in);
 
-        return -EOPNOTSUPP;
+        if (!netif_running(dev))
+                return -EAGAIN;
+
+        return mdio_mii_ioctl(&bp->mdio, mdio, cmd);
 }
 
 /* called with rtnl_lock */
@@ -11420,6 +11459,14 @@ static int __devinit bnx2x_init_dev(struct pci_dev *pdev,
         dev->vlan_features |= NETIF_F_TSO6;
 #endif
 
+        /* get_port_hwinfo() will set prtad and mmds properly */
+        bp->mdio.prtad = MDIO_PRTAD_NONE;
+        bp->mdio.mmds = 0;
+        bp->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
+        bp->mdio.dev = dev;
+        bp->mdio.mdio_read = bnx2x_mdio_read;
+        bp->mdio.mdio_write = bnx2x_mdio_write;
+
         return 0;
 
 err_out_unmap: