igb: add support for 82580 MAC

This patch adds support for the 82580 MAC.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 266 insertions, 36 deletions

diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c
index 5d345e3036a4..e8e9e9194a88 100644
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -46,7 +46,10 @@ static s32  igb_get_cfg_done_82575(struct e1000_hw *);
 static s32  igb_init_hw_82575(struct e1000_hw *);
 static s32  igb_phy_hw_reset_sgmii_82575(struct e1000_hw *);
 static s32  igb_read_phy_reg_sgmii_82575(struct e1000_hw *, u32, u16 *);
+static s32  igb_read_phy_reg_82580(struct e1000_hw *, u32, u16 *);
+static s32  igb_write_phy_reg_82580(struct e1000_hw *, u32, u16);
 static s32  igb_reset_hw_82575(struct e1000_hw *);
+static s32  igb_reset_hw_82580(struct e1000_hw *);
 static s32  igb_set_d0_lplu_state_82575(struct e1000_hw *, bool);
 static s32  igb_setup_copper_link_82575(struct e1000_hw *);
 static s32  igb_setup_serdes_link_82575(struct e1000_hw *);
@@ -62,6 +65,12 @@ static s32  igb_reset_init_script_82575(struct e1000_hw *);
 static s32  igb_read_mac_addr_82575(struct e1000_hw *);
 static s32  igb_set_pcie_completion_timeout(struct e1000_hw *hw);
 
+static const u16 e1000_82580_rxpbs_table[] =
+        { 36, 72, 144, 1, 2, 4, 8, 16,
+          35, 70, 140 };
+#define E1000_82580_RXPBS_TABLE_SIZE \
+        (sizeof(e1000_82580_rxpbs_table)/sizeof(u16))
+
 static s32 igb_get_invariants_82575(struct e1000_hw *hw)
 {
         struct e1000_phy_info *phy = &hw->phy;
@@ -88,6 +97,13 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
         case E1000_DEV_ID_82576_SERDES_QUAD:
                 mac->type = e1000_82576;
                 break;
+        case E1000_DEV_ID_82580_COPPER:
+        case E1000_DEV_ID_82580_FIBER:
+        case E1000_DEV_ID_82580_SERDES:
+        case E1000_DEV_ID_82580_SGMII:
+        case E1000_DEV_ID_82580_COPPER_DUAL:
+                mac->type = e1000_82580;
+                break;
         default:
                 return -E1000_ERR_MAC_INIT;
                 break;
@@ -110,6 +126,7 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
                 dev_spec->sgmii_active = true;
                 ctrl_ext |= E1000_CTRL_I2C_ENA;
                 break;
+        case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
         case E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES:
                 hw->phy.media_type = e1000_media_type_internal_serdes;
                 ctrl_ext |= E1000_CTRL_I2C_ENA;
@@ -121,12 +138,26 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
 
         wr32(E1000_CTRL_EXT, ctrl_ext);
 
+        /*
+         * if using i2c make certain the MDICNFG register is cleared to prevent
+         * communications from being misrouted to the mdic registers
+         */
+        if ((ctrl_ext & E1000_CTRL_I2C_ENA) && (hw->mac.type == e1000_82580))
+                wr32(E1000_MDICNFG, 0);
+
         /* Set mta register count */
         mac->mta_reg_count = 128;
         /* Set rar entry count */
         mac->rar_entry_count = E1000_RAR_ENTRIES_82575;
         if (mac->type == e1000_82576)
                 mac->rar_entry_count = E1000_RAR_ENTRIES_82576;
+        if (mac->type == e1000_82580)
+                mac->rar_entry_count = E1000_RAR_ENTRIES_82580;
+        /* reset */
+        if (mac->type == e1000_82580)
+                mac->ops.reset_hw = igb_reset_hw_82580;
+        else
+                mac->ops.reset_hw = igb_reset_hw_82575;
         /* Set if part includes ASF firmware */
         mac->asf_firmware_present = true;
         /* Set if manageability features are enabled. */
@@ -194,6 +225,10 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
                 phy->ops.reset              = igb_phy_hw_reset_sgmii_82575;
                 phy->ops.read_reg           = igb_read_phy_reg_sgmii_82575;
                 phy->ops.write_reg          = igb_write_phy_reg_sgmii_82575;
+        } else if (hw->mac.type == e1000_82580) {
+                phy->ops.reset              = igb_phy_hw_reset;
+                phy->ops.read_reg           = igb_read_phy_reg_82580;
+                phy->ops.write_reg          = igb_write_phy_reg_82580;
         } else {
                 phy->ops.reset              = igb_phy_hw_reset;
                 phy->ops.read_reg           = igb_read_phy_reg_igp;
@@ -225,6 +260,12 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
                 phy->ops.set_d0_lplu_state  = igb_set_d0_lplu_state_82575;
                 phy->ops.set_d3_lplu_state  = igb_set_d3_lplu_state;
                 break;
+        case I82580_I_PHY_ID:
+                phy->type                   = e1000_phy_82580;
+                phy->ops.force_speed_duplex = igb_phy_force_speed_duplex_82580;
+                phy->ops.get_cable_length   = igb_get_cable_length_82580;
+                phy->ops.get_phy_info       = igb_get_phy_info_82580;
+                break;
         default:
                 return -E1000_ERR_PHY;
         }
@@ -635,6 +676,10 @@ static s32 igb_get_cfg_done_82575(struct e1000_hw *hw)
 
         if (hw->bus.func == 1)
                 mask = E1000_NVM_CFG_DONE_PORT_1;
+        else if (hw->bus.func == E1000_FUNC_2)
+                mask = E1000_NVM_CFG_DONE_PORT_2;
+        else if (hw->bus.func == E1000_FUNC_3)
+                mask = E1000_NVM_CFG_DONE_PORT_3;
 
         while (timeout) {
                 if (rd32(E1000_EEMNGCTL) & mask)
@@ -754,6 +799,10 @@ void igb_shutdown_serdes_link_82575(struct e1000_hw *hw)
 
         if (hw->bus.func == E1000_FUNC_0)
                 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
+        else if (hw->mac.type == e1000_82580)
+                hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
+                                 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
+                                 &eeprom_data);
         else if (hw->bus.func == E1000_FUNC_1)
                 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 
@@ -918,6 +967,9 @@ static s32 igb_setup_copper_link_82575(struct e1000_hw *hw)
                 goto out;
 
         if (igb_sgmii_active_82575(hw) && !hw->phy.reset_disable) {
+                /* allow time for SFP cage time to power up phy */
+                msleep(300);
+
                 ret_val = hw->phy.ops.reset(hw);
                 if (ret_val) {
                         hw_dbg("Error resetting the PHY.\n");
@@ -931,6 +983,9 @@ static s32 igb_setup_copper_link_82575(struct e1000_hw *hw)
         case e1000_phy_igp_3:
                 ret_val = igb_copper_link_setup_igp(hw);
                 break;
+        case e1000_phy_82580:
+                ret_val = igb_copper_link_setup_82580(hw);
+                break;
         default:
                 ret_val = -E1000_ERR_PHY;
                 break;
@@ -955,7 +1010,8 @@ out:
  **/
 static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
 {
-        u32 ctrl_reg, reg;
+        u32 ctrl_ext, ctrl_reg, reg;
+        bool pcs_autoneg;
 
         if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
             !igb_sgmii_active_82575(hw))
@@ -970,9 +1026,9 @@ static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
         wr32(E1000_SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);
 
         /* power on the sfp cage if present */
-        reg = rd32(E1000_CTRL_EXT);
-        reg &= ~E1000_CTRL_EXT_SDP3_DATA;
-        wr32(E1000_CTRL_EXT, reg);
+        ctrl_ext = rd32(E1000_CTRL_EXT);
+        ctrl_ext &= ~E1000_CTRL_EXT_SDP3_DATA;
+        wr32(E1000_CTRL_EXT, ctrl_ext);
 
         ctrl_reg = rd32(E1000_CTRL);
         ctrl_reg |= E1000_CTRL_SLU;
@@ -989,15 +1045,31 @@ static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
 
         reg = rd32(E1000_PCS_LCTL);
 
-        if (igb_sgmii_active_82575(hw)) {
-                /* allow time for SFP cage to power up phy */
-                msleep(300);
+        /* default pcs_autoneg to the same setting as mac autoneg */
+        pcs_autoneg = hw->mac.autoneg;
 
-                /* AN time out should be disabled for SGMII mode */
+        switch (ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK) {
+        case E1000_CTRL_EXT_LINK_MODE_SGMII:
+                /* sgmii mode lets the phy handle forcing speed/duplex */
+                pcs_autoneg = true;
+                /* autoneg time out should be disabled for SGMII mode */
                 reg &= ~(E1000_PCS_LCTL_AN_TIMEOUT);
-        } else {
+                break;
+        case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
+                /* disable PCS autoneg and support parallel detect only */
+                pcs_autoneg = false;
+        default:
+                /*
+                 * non-SGMII modes only supports a speed of 1000/Full for the
+                 * link so it is best to just force the MAC and let the pcs
+                 * link either autoneg or be forced to 1000/Full
+                 */
                 ctrl_reg |= E1000_CTRL_SPD_1000 | E1000_CTRL_FRCSPD |
                             E1000_CTRL_FD | E1000_CTRL_FRCDPX;
+
+                /* set speed of 1000/Full if speed/duplex is forced */
+                reg |= E1000_PCS_LCTL_FSV_1000 | E1000_PCS_LCTL_FDV_FULL;
+                break;
         }
 
         wr32(E1000_CTRL, ctrl_reg);
@@ -1008,7 +1080,6 @@ static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
          * mode that will be compatible with older link partners and switches.
          * However, both are supported by the hardware and some drivers/tools.
          */
-
         reg &= ~(E1000_PCS_LCTL_AN_ENABLE | E1000_PCS_LCTL_FLV_LINK_UP |
                 E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK);
 
@@ -1018,34 +1089,18 @@ static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
          */
         reg |= E1000_PCS_LCTL_FORCE_FCTRL;
 
-        /*
-         * we always set sgmii to autoneg since it is the phy that will be
-         * forcing the link and the serdes is just a go-between
-         */
-        if (hw->mac.autoneg || igb_sgmii_active_82575(hw)) {
+        if (pcs_autoneg) {
                 /* Set PCS register for autoneg */
-                reg |= E1000_PCS_LCTL_FSV_1000 |  /* Force 1000 */
-                       E1000_PCS_LCTL_FDV_FULL |  /* SerDes Full dplx */
-                       E1000_PCS_LCTL_AN_ENABLE | /* Enable Autoneg */
+                reg |= E1000_PCS_LCTL_AN_ENABLE | /* Enable Autoneg */
                        E1000_PCS_LCTL_AN_RESTART; /* Restart autoneg */
-                hw_dbg("Configuring Autoneg; PCS_LCTL = 0x%08X\n", reg);
+                hw_dbg("Configuring Autoneg:PCS_LCTL=0x%08X\n", reg);
         } else {
-                /* Check for duplex first */
-                if (hw->mac.forced_speed_duplex & E1000_ALL_FULL_DUPLEX)
-                        reg |= E1000_PCS_LCTL_FDV_FULL;
-
-                /* No need to check for 1000/full since the spec states that
-                 * it requires autoneg to be enabled */
-                /* Now set speed */
-                if (hw->mac.forced_speed_duplex & E1000_ALL_100_SPEED)
-                        reg |= E1000_PCS_LCTL_FSV_100;
-
-                /* Force speed and force link */
-                reg |= E1000_PCS_LCTL_FSD |
-                       E1000_PCS_LCTL_FORCE_LINK |
-                       E1000_PCS_LCTL_FLV_LINK_UP;
-
-                hw_dbg("Configuring Forced Link; PCS_LCTL = 0x%08X\n", reg);
+                /* Set PCS register for forced link */
+                reg |= E1000_PCS_LCTL_FSD |        /* Force Speed */
+                       E1000_PCS_LCTL_FORCE_LINK | /* Force Link */
+                       E1000_PCS_LCTL_FLV_LINK_UP; /* Force link value up */
+
+                hw_dbg("Configuring Forced Link:PCS_LCTL=0x%08X\n", reg);
         }
 
         wr32(E1000_PCS_LCTL, reg);
@@ -1354,8 +1409,183 @@ void igb_vmdq_set_replication_pf(struct e1000_hw *hw, bool enable)
         wr32(E1000_VT_CTL, vt_ctl);
 }
 
+/**
+ *  igb_read_phy_reg_82580 - Read 82580 MDI control register
+ *  @hw: pointer to the HW structure
+ *  @offset: register offset to be read
+ *  @data: pointer to the read data
+ *
+ *  Reads the MDI control register in the PHY at offset and stores the
+ *  information read to data.
+ **/
+static s32 igb_read_phy_reg_82580(struct e1000_hw *hw, u32 offset, u16 *data)
+{
+        u32 mdicnfg = 0;
+        s32 ret_val;
+
+
+        ret_val = hw->phy.ops.acquire(hw);
+        if (ret_val)
+                goto out;
+
+        /*
+         * We config the phy address in MDICNFG register now. Same bits
+         * as before. The values in MDIC can be written but will be
+         * ignored. This allows us to call the old function after
+         * configuring the PHY address in the new register
+         */
+        mdicnfg = (hw->phy.addr << E1000_MDIC_PHY_SHIFT);
+        wr32(E1000_MDICNFG, mdicnfg);
+
+        ret_val = igb_read_phy_reg_mdic(hw, offset, data);
+
+        hw->phy.ops.release(hw);
+
+out:
+        return ret_val;
+}
+
+/**
+ *  igb_write_phy_reg_82580 - Write 82580 MDI control register
+ *  @hw: pointer to the HW structure
+ *  @offset: register offset to write to
+ *  @data: data to write to register at offset
+ *
+ *  Writes data to MDI control register in the PHY at offset.
+ **/
+static s32 igb_write_phy_reg_82580(struct e1000_hw *hw, u32 offset, u16 data)
+{
+        u32 mdicnfg = 0;
+        s32 ret_val;
+
+
+        ret_val = hw->phy.ops.acquire(hw);
+        if (ret_val)
+                goto out;
+
+        /*
+         * We config the phy address in MDICNFG register now. Same bits
+         * as before. The values in MDIC can be written but will be
+         * ignored. This allows us to call the old function after
+         * configuring the PHY address in the new register
+         */
+        mdicnfg = (hw->phy.addr << E1000_MDIC_PHY_SHIFT);
+        wr32(E1000_MDICNFG, mdicnfg);
+
+        ret_val = igb_write_phy_reg_mdic(hw, offset, data);
+
+        hw->phy.ops.release(hw);
+
+out:
+        return ret_val;
+}
+
+/**
+ *  igb_reset_hw_82580 - Reset hardware
+ *  @hw: pointer to the HW structure
+ *
+ *  This resets function or entire device (all ports, etc.)
+ *  to a known state.
+ **/
+static s32 igb_reset_hw_82580(struct e1000_hw *hw)
+{
+        s32 ret_val = 0;
+        /* BH SW mailbox bit in SW_FW_SYNC */
+        u16 swmbsw_mask = E1000_SW_SYNCH_MB;
+        u32 ctrl, icr;
+        bool global_device_reset = hw->dev_spec._82575.global_device_reset;
+
+
+        hw->dev_spec._82575.global_device_reset = false;
+
+        /* Get current control state. */
+        ctrl = rd32(E1000_CTRL);
+
+        /*
+         * Prevent the PCI-E bus from sticking if there is no TLP connection
+         * on the last TLP read/write transaction when MAC is reset.
+         */
+        ret_val = igb_disable_pcie_master(hw);
+        if (ret_val)
+                hw_dbg("PCI-E Master disable polling has failed.\n");
+
+        hw_dbg("Masking off all interrupts\n");
+        wr32(E1000_IMC, 0xffffffff);
+        wr32(E1000_RCTL, 0);
+        wr32(E1000_TCTL, E1000_TCTL_PSP);
+        wrfl();
+
+        msleep(10);
+
+        /* Determine whether or not a global dev reset is requested */
+        if (global_device_reset &&
+                igb_acquire_swfw_sync_82575(hw, swmbsw_mask))
+                        global_device_reset = false;
+
+        if (global_device_reset &&
+                !(rd32(E1000_STATUS) & E1000_STAT_DEV_RST_SET))
+                ctrl |= E1000_CTRL_DEV_RST;
+        else
+                ctrl |= E1000_CTRL_RST;
+
+        wr32(E1000_CTRL, ctrl);
+
+        /* Add delay to insure DEV_RST has time to complete */
+        if (global_device_reset)
+                msleep(5);
+
+        ret_val = igb_get_auto_rd_done(hw);
+        if (ret_val) {
+                /*
+                 * When auto config read does not complete, do not
+                 * return with an error. This can happen in situations
+                 * where there is no eeprom and prevents getting link.
+                 */
+                hw_dbg("Auto Read Done did not complete\n");
+        }
+
+        /* If EEPROM is not present, run manual init scripts */
+        if ((rd32(E1000_EECD) & E1000_EECD_PRES) == 0)
+                igb_reset_init_script_82575(hw);
+
+        /* clear global device reset status bit */
+        wr32(E1000_STATUS, E1000_STAT_DEV_RST_SET);
+
+        /* Clear any pending interrupt events. */
+        wr32(E1000_IMC, 0xffffffff);
+        icr = rd32(E1000_ICR);
+
+        /* Install any alternate MAC address into RAR0 */
+        ret_val = igb_check_alt_mac_addr(hw);
+
+        /* Release semaphore */
+        if (global_device_reset)
+                igb_release_swfw_sync_82575(hw, swmbsw_mask);
+
+        return ret_val;
+}
+
+/**
+ *  igb_rxpbs_adjust_82580 - adjust RXPBS value to reflect actual RX PBA size
+ *  @data: data received by reading RXPBS register
+ *
+ *  The 82580 uses a table based approach for packet buffer allocation sizes.
+ *  This function converts the retrieved value into the correct table value
+ *     0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7
+ *  0x0 36  72 144   1   2   4   8  16
+ *  0x8 35  70 140 rsv rsv rsv rsv rsv
+ */
+u16 igb_rxpbs_adjust_82580(u32 data)
+{
+        u16 ret_val = 0;
+
+        if (data < E1000_82580_RXPBS_TABLE_SIZE)
+                ret_val = e1000_82580_rxpbs_table[data];
+
+        return ret_val;
+}
+
 static struct e1000_mac_operations e1000_mac_ops_82575 = {
-        .reset_hw             = igb_reset_hw_82575,
         .init_hw              = igb_init_hw_82575,
         .check_for_link       = igb_check_for_link_82575,
         .rar_set              = igb_rar_set,