ixgbe: driver for Intel(R) 82598 PCI-Express 10GbE adapters (v4)

This patch adds support for the Intel 82598 PCI-Express 10GbE
chipset. Devices will be available on the market soon.

This version of the driver is largely the same as the last release:

  * Driver uses a single RX and single TX queue, each using 1 MSI-X
  irq vector.
  * Driver runs in NAPI mode only
  * Driver is largely multiqueue-ready (TM)

Changes since 20070803:
  * removed wrappers for hardware functions
  * incorporated e1000e-style HW api reorganization code
  * sparse/checkpatch cleanups, namespace cleanups
  * driver prints out extra debugging information at load time
    identifying adapter board number, mac, phy types
  * removed ixgbe_api.c, ixgbe_api.h, ixgbe_osdep.h
  * driver update to 1.1.18
  * removed ixgbe.txt which contained no useful info anymore

[ Integrated napi_struct changes from Auke as well... -DaveM ]

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 494 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_phy.c b/drivers/net/ixgbe/ixgbe_phy.c
new file mode 100644
index 000000000000..8002931ae823
--- /dev/null
+++ b/drivers/net/ixgbe/ixgbe_phy.c
@@ -0,0 +1,494 @@
+/*******************************************************************************
+
+  Intel 10 Gigabit PCI Express Linux driver
+  Copyright(c) 1999 - 2007 Intel Corporation.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information:
+  Linux NICS <linux.nics@intel.com>
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+
+#include "ixgbe_common.h"
+#include "ixgbe_phy.h"
+
+static enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id);
+static s32 ixgbe_get_phy_id(struct ixgbe_hw *hw);
+static bool ixgbe_validate_phy_addr(struct ixgbe_hw *hw, u32 phy_addr);
+static s32 ixgbe_write_phy_reg(struct ixgbe_hw *hw, u32 reg_addr,
+                               u32 device_type, u16 phy_data);
+
+/**
+ *  ixgbe_identify_phy - Get physical layer module
+ *  @hw: pointer to hardware structure
+ *
+ *  Determines the physical layer module found on the current adapter.
+ **/
+s32 ixgbe_identify_phy(struct ixgbe_hw *hw)
+{
+        s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
+        u32 phy_addr;
+
+        for (phy_addr = 0; phy_addr < IXGBE_MAX_PHY_ADDR; phy_addr++) {
+                if (ixgbe_validate_phy_addr(hw, phy_addr)) {
+                        hw->phy.addr = phy_addr;
+                        ixgbe_get_phy_id(hw);
+                        hw->phy.type = ixgbe_get_phy_type_from_id(hw->phy.id);
+                        status = 0;
+                        break;
+                }
+        }
+        return status;
+}
+
+/**
+ *  ixgbe_validate_phy_addr - Determines phy address is valid
+ *  @hw: pointer to hardware structure
+ *
+ **/
+static bool ixgbe_validate_phy_addr(struct ixgbe_hw *hw, u32 phy_addr)
+{
+        u16 phy_id = 0;
+        bool valid = false;
+
+        hw->phy.addr = phy_addr;
+        ixgbe_read_phy_reg(hw,
+                           IXGBE_MDIO_PHY_ID_HIGH,
+                           IXGBE_MDIO_PMA_PMD_DEV_TYPE,
+                           &phy_id);
+
+        if (phy_id != 0xFFFF && phy_id != 0x0)
+                valid = true;
+
+        return valid;
+}
+
+/**
+ *  ixgbe_get_phy_id - Get the phy type
+ *  @hw: pointer to hardware structure
+ *
+ **/
+static s32 ixgbe_get_phy_id(struct ixgbe_hw *hw)
+{
+        u32 status;
+        u16 phy_id_high = 0;
+        u16 phy_id_low = 0;
+
+        status = ixgbe_read_phy_reg(hw,
+                                   IXGBE_MDIO_PHY_ID_HIGH,
+                                   IXGBE_MDIO_PMA_PMD_DEV_TYPE,
+                                   &phy_id_high);
+
+        if (status == 0) {
+                hw->phy.id = (u32)(phy_id_high << 16);
+                status = ixgbe_read_phy_reg(hw,
+                                           IXGBE_MDIO_PHY_ID_LOW,
+                                           IXGBE_MDIO_PMA_PMD_DEV_TYPE,
+                                           &phy_id_low);
+                hw->phy.id |= (u32)(phy_id_low & IXGBE_PHY_REVISION_MASK);
+                hw->phy.revision = (u32)(phy_id_low & ~IXGBE_PHY_REVISION_MASK);
+        }
+
+        return status;
+}
+
+/**
+ *  ixgbe_get_phy_type_from_id - Get the phy type
+ *  @hw: pointer to hardware structure
+ *
+ **/
+static enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id)
+{
+        enum ixgbe_phy_type phy_type;
+
+        switch (phy_id) {
+        case TN1010_PHY_ID:
+                phy_type = ixgbe_phy_tn;
+                break;
+        case QT2022_PHY_ID:
+                phy_type = ixgbe_phy_qt;
+                break;
+        default:
+                phy_type = ixgbe_phy_unknown;
+                break;
+        }
+
+        return phy_type;
+}
+
+/**
+ *  ixgbe_reset_phy - Performs a PHY reset
+ *  @hw: pointer to hardware structure
+ **/
+s32 ixgbe_reset_phy(struct ixgbe_hw *hw)
+{
+        /*
+         * Perform soft PHY reset to the PHY_XS.
+         * This will cause a soft reset to the PHY
+         */
+        return ixgbe_write_phy_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
+                                   IXGBE_MDIO_PHY_XS_DEV_TYPE,
+                                   IXGBE_MDIO_PHY_XS_RESET);
+}
+
+/**
+ *  ixgbe_read_phy_reg - Reads a value from a specified PHY register
+ *  @hw: pointer to hardware structure
+ *  @reg_addr: 32 bit address of PHY register to read
+ *  @phy_data: Pointer to read data from PHY register
+ **/
+s32 ixgbe_read_phy_reg(struct ixgbe_hw *hw, u32 reg_addr,
+                       u32 device_type, u16 *phy_data)
+{
+        u32 command;
+        u32 i;
+        u32 timeout = 10;
+        u32 data;
+        s32 status = 0;
+        u16 gssr;
+
+        if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
+                gssr = IXGBE_GSSR_PHY1_SM;
+        else
+                gssr = IXGBE_GSSR_PHY0_SM;
+
+        if (ixgbe_acquire_swfw_sync(hw, gssr) != 0)
+                status = IXGBE_ERR_SWFW_SYNC;
+
+        if (status == 0) {
+                /* Setup and write the address cycle command */
+                command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
+                           (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
+                           (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
+                           (IXGBE_MSCA_ADDR_CYCLE | IXGBE_MSCA_MDI_COMMAND));
+
+                IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
+
+                /*
+                 * Check every 10 usec to see if the address cycle completed.
+                 * The MDI Command bit will clear when the operation is
+                 * complete
+                 */
+                for (i = 0; i < timeout; i++) {
+                        udelay(10);
+
+                        command = IXGBE_READ_REG(hw, IXGBE_MSCA);
+
+                        if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
+                                break;
+                }
+
+                if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
+                        hw_dbg(hw, "PHY address command did not complete.\n");
+                        status = IXGBE_ERR_PHY;
+                }
+
+                if (status == 0) {
+                        /*
+                         * Address cycle complete, setup and write the read
+                         * command
+                         */
+                        command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
+                                   (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
+                                   (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
+                                   (IXGBE_MSCA_READ | IXGBE_MSCA_MDI_COMMAND));
+
+                        IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
+
+                        /*
+                         * Check every 10 usec to see if the address cycle
+                         * completed. The MDI Command bit will clear when the
+                         * operation is complete
+                         */
+                        for (i = 0; i < timeout; i++) {
+                                udelay(10);
+
+                                command = IXGBE_READ_REG(hw, IXGBE_MSCA);
+
+                                if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
+                                        break;
+                        }
+
+                        if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
+                                hw_dbg(hw,
+                                       "PHY read command didn't complete\n");
+                                status = IXGBE_ERR_PHY;
+                        } else {
+                                /*
+                                 * Read operation is complete.  Get the data
+                                 * from MSRWD
+                                 */
+                                data = IXGBE_READ_REG(hw, IXGBE_MSRWD);
+                                data >>= IXGBE_MSRWD_READ_DATA_SHIFT;
+                                *phy_data = (u16)(data);
+                        }
+                }
+
+                ixgbe_release_swfw_sync(hw, gssr);
+        }
+        return status;
+}
+
+/**
+ *  ixgbe_write_phy_reg - Writes a value to specified PHY register
+ *  @hw: pointer to hardware structure
+ *  @reg_addr: 32 bit PHY register to write
+ *  @device_type: 5 bit device type
+ *  @phy_data: Data to write to the PHY register
+ **/
+static s32 ixgbe_write_phy_reg(struct ixgbe_hw *hw, u32 reg_addr,
+                               u32 device_type, u16 phy_data)
+{
+        u32 command;
+        u32 i;
+        u32 timeout = 10;
+        s32 status = 0;
+        u16 gssr;
+
+        if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
+                gssr = IXGBE_GSSR_PHY1_SM;
+        else
+                gssr = IXGBE_GSSR_PHY0_SM;
+
+        if (ixgbe_acquire_swfw_sync(hw, gssr) != 0)
+                status = IXGBE_ERR_SWFW_SYNC;
+
+        if (status == 0) {
+                /* Put the data in the MDI single read and write data register*/
+                IXGBE_WRITE_REG(hw, IXGBE_MSRWD, (u32)phy_data);
+
+                /* Setup and write the address cycle command */
+                command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
+                           (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
+                           (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
+                           (IXGBE_MSCA_ADDR_CYCLE | IXGBE_MSCA_MDI_COMMAND));
+
+                IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
+
+                /*
+                 * Check every 10 usec to see if the address cycle completed.
+                 * The MDI Command bit will clear when the operation is
+                 * complete
+                 */
+                for (i = 0; i < timeout; i++) {
+                        udelay(10);
+
+                        command = IXGBE_READ_REG(hw, IXGBE_MSCA);
+
+                        if ((command & IXGBE_MSCA_MDI_COMMAND) == 0) {
+                                hw_dbg(hw, "PHY address cmd didn't complete\n");
+                                break;
+                        }
+                }
+
+                if ((command & IXGBE_MSCA_MDI_COMMAND) != 0)
+                        status = IXGBE_ERR_PHY;
+
+                if (status == 0) {
+                        /*
+                         * Address cycle complete, setup and write the write
+                         * command
+                         */
+                        command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
+                                   (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
+                                   (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
+                                   (IXGBE_MSCA_WRITE | IXGBE_MSCA_MDI_COMMAND));
+
+                        IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
+
+                        /*
+                         * Check every 10 usec to see if the address cycle
+                         * completed. The MDI Command bit will clear when the
+                         * operation is complete
+                         */
+                        for (i = 0; i < timeout; i++) {
+                                udelay(10);
+
+                                command = IXGBE_READ_REG(hw, IXGBE_MSCA);
+
+                                if ((command & IXGBE_MSCA_MDI_COMMAND) == 0) {
+                                        hw_dbg(hw, "PHY write command did not "
+                                                  "complete.\n");
+                                        break;
+                                }
+                        }
+
+                        if ((command & IXGBE_MSCA_MDI_COMMAND) != 0)
+                                status = IXGBE_ERR_PHY;
+                }
+
+                ixgbe_release_swfw_sync(hw, gssr);
+        }
+
+        return status;
+}
+
+/**
+ *  ixgbe_setup_tnx_phy_link - Set and restart autoneg
+ *  @hw: pointer to hardware structure
+ *
+ *  Restart autonegotiation and PHY and waits for completion.
+ **/
+s32 ixgbe_setup_tnx_phy_link(struct ixgbe_hw *hw)
+{
+        s32 status = IXGBE_NOT_IMPLEMENTED;
+        u32 time_out;
+        u32 max_time_out = 10;
+        u16 autoneg_speed_selection_register = 0x10;
+        u16 autoneg_restart_mask = 0x0200;
+        u16 autoneg_complete_mask = 0x0020;
+        u16 autoneg_reg = 0;
+
+        /*
+         * Set advertisement settings in PHY based on autoneg_advertised
+         * settings. If autoneg_advertised = 0, then advertise default values
+         * txn devices cannot be "forced" to a autoneg 10G and fail.  But can
+         * for a 1G.
+         */
+        ixgbe_read_phy_reg(hw,
+                  autoneg_speed_selection_register,
+                  IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
+                  &autoneg_reg);
+
+        if (hw->phy.autoneg_advertised == IXGBE_LINK_SPEED_1GB_FULL)
+                autoneg_reg &= 0xEFFF; /* 0 in bit 12 is 1G operation */
+        else
+                autoneg_reg |= 0x1000; /* 1 in bit 12 is 10G/1G operation */
+
+        ixgbe_write_phy_reg(hw,
+                  autoneg_speed_selection_register,
+                  IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
+                  autoneg_reg);
+
+
+        /* Restart PHY autonegotiation and wait for completion */
+        ixgbe_read_phy_reg(hw,
+                  IXGBE_MDIO_AUTO_NEG_CONTROL,
+                  IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
+                  &autoneg_reg);
+
+        autoneg_reg |= autoneg_restart_mask;
+
+        ixgbe_write_phy_reg(hw,
+                  IXGBE_MDIO_AUTO_NEG_CONTROL,
+                  IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
+                  autoneg_reg);
+
+        /* Wait for autonegotiation to finish */
+        for (time_out = 0; time_out < max_time_out; time_out++) {
+                udelay(10);
+                /* Restart PHY autonegotiation and wait for completion */
+                status = ixgbe_read_phy_reg(hw,
+                                            IXGBE_MDIO_AUTO_NEG_STATUS,
+                                            IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
+                                            &autoneg_reg);
+
+                autoneg_reg &= autoneg_complete_mask;
+                if (autoneg_reg == autoneg_complete_mask) {
+                        status = 0;
+                        break;
+                }
+        }
+
+        if (time_out == max_time_out)
+                status = IXGBE_ERR_LINK_SETUP;
+
+        return status;
+}
+
+/**
+ *  ixgbe_check_tnx_phy_link - Determine link and speed status
+ *  @hw: pointer to hardware structure
+ *
+ *  Reads the VS1 register to determine if link is up and the current speed for
+ *  the PHY.
+ **/
+s32 ixgbe_check_tnx_phy_link(struct ixgbe_hw *hw, u32 *speed,
+                             bool *link_up)
+{
+        s32 status = 0;
+        u32 time_out;
+        u32 max_time_out = 10;
+        u16 phy_link = 0;
+        u16 phy_speed = 0;
+        u16 phy_data = 0;
+
+        /* Initialize speed and link to default case */
+        *link_up = false;
+        *speed = IXGBE_LINK_SPEED_10GB_FULL;
+
+        /*
+         * Check current speed and link status of the PHY register.
+         * This is a vendor specific register and may have to
+         * be changed for other copper PHYs.
+         */
+        for (time_out = 0; time_out < max_time_out; time_out++) {
+                udelay(10);
+                if (phy_link == IXGBE_MDIO_VENDOR_SPECIFIC_1_LINK_STATUS) {
+                        *link_up = true;
+                        if (phy_speed ==
+                            IXGBE_MDIO_VENDOR_SPECIFIC_1_SPEED_STATUS)
+                                *speed = IXGBE_LINK_SPEED_1GB_FULL;
+                        break;
+                } else {
+                        status = ixgbe_read_phy_reg(hw,
+                                     IXGBE_MDIO_VENDOR_SPECIFIC_1_STATUS,
+                                     IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
+                                     &phy_data);
+                        phy_link = phy_data &
+                                IXGBE_MDIO_VENDOR_SPECIFIC_1_LINK_STATUS;
+                        phy_speed = phy_data &
+                                IXGBE_MDIO_VENDOR_SPECIFIC_1_SPEED_STATUS;
+                }
+        }
+
+        return status;
+}
+
+/**
+ *  ixgbe_setup_tnx_phy_link_speed - Sets the auto advertised capabilities
+ *  @hw: pointer to hardware structure
+ *  @speed: new link speed
+ *  @autoneg: true if autonegotiation enabled
+ **/
+s32 ixgbe_setup_tnx_phy_link_speed(struct ixgbe_hw *hw, u32 speed,
+                                   bool autoneg,
+                                   bool autoneg_wait_to_complete)
+{
+        /*
+         * Clear autoneg_advertised and set new values based on input link
+         * speed.
+         */
+        hw->phy.autoneg_advertised = 0;
+
+        if (speed & IXGBE_LINK_SPEED_10GB_FULL)
+                hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;
+        if (speed & IXGBE_LINK_SPEED_1GB_FULL)
+                hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;
+
+        /* Setup link based on the new speed settings */
+        ixgbe_setup_tnx_phy_link(hw);
+
+        return 0;
+}