ixgbevf: 82599 Virtual Function core functions and header

This module and header file contain the core functions for the 82599
virtual function device.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 555 insertions, 0 deletions

diff --git a/drivers/net/ixgbevf/vf.c b/drivers/net/ixgbevf/vf.c
new file mode 100644
index 000000000000..4b5dec0ec140
--- /dev/null
+++ b/drivers/net/ixgbevf/vf.c
@@ -0,0 +1,387 @@
+/*******************************************************************************
+
+  Intel 82599 Virtual Function driver
+  Copyright(c) 1999 - 2009 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:
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include "vf.h"
+
+/**
+ *  ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
+ *  @hw: pointer to hardware structure
+ *
+ *  Starts the hardware by filling the bus info structure and media type, clears
+ *  all on chip counters, initializes receive address registers, multicast
+ *  table, VLAN filter table, calls routine to set up link and flow control
+ *  settings, and leaves transmit and receive units disabled and uninitialized
+ **/
+static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
+{
+        /* Clear adapter stopped flag */
+        hw->adapter_stopped = false;
+
+        return 0;
+}
+
+/**
+ *  ixgbevf_init_hw_vf - virtual function hardware initialization
+ *  @hw: pointer to hardware structure
+ *
+ *  Initialize the hardware by resetting the hardware and then starting
+ *  the hardware
+ **/
+static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
+{
+        s32 status = hw->mac.ops.start_hw(hw);
+
+        hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
+
+        return status;
+}
+
+/**
+ *  ixgbevf_reset_hw_vf - Performs hardware reset
+ *  @hw: pointer to hardware structure
+ *
+ *  Resets the hardware by reseting the transmit and receive units, masks and
+ *  clears all interrupts.
+ **/
+static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
+{
+        struct ixgbe_mbx_info *mbx = &hw->mbx;
+        u32 timeout = IXGBE_VF_INIT_TIMEOUT;
+        s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
+        u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
+        u8 *addr = (u8 *)(&msgbuf[1]);
+
+        /* Call adapter stop to disable tx/rx and clear interrupts */
+        hw->mac.ops.stop_adapter(hw);
+
+        IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
+        IXGBE_WRITE_FLUSH(hw);
+
+        /* we cannot reset while the RSTI / RSTD bits are asserted */
+        while (!mbx->ops.check_for_rst(hw) && timeout) {
+                timeout--;
+                udelay(5);
+        }
+
+        if (!timeout)
+                return IXGBE_ERR_RESET_FAILED;
+
+        /* mailbox timeout can now become active */
+        mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
+
+        msgbuf[0] = IXGBE_VF_RESET;
+        mbx->ops.write_posted(hw, msgbuf, 1);
+
+        msleep(10);
+
+        /* set our "perm_addr" based on info provided by PF */
+        /* also set up the mc_filter_type which is piggy backed
+         * on the mac address in word 3 */
+        ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
+        if (ret_val)
+                return ret_val;
+
+        if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
+                return IXGBE_ERR_INVALID_MAC_ADDR;
+
+        memcpy(hw->mac.perm_addr, addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
+        hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
+
+        return 0;
+}
+
+/**
+ *  ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
+ *  @hw: pointer to hardware structure
+ *
+ *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
+ *  disables transmit and receive units. The adapter_stopped flag is used by
+ *  the shared code and drivers to determine if the adapter is in a stopped
+ *  state and should not touch the hardware.
+ **/
+static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
+{
+        u32 number_of_queues;
+        u32 reg_val;
+        u16 i;
+
+        /*
+         * Set the adapter_stopped flag so other driver functions stop touching
+         * the hardware
+         */
+        hw->adapter_stopped = true;
+
+        /* Disable the receive unit by stopped each queue */
+        number_of_queues = hw->mac.max_rx_queues;
+        for (i = 0; i < number_of_queues; i++) {
+                reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
+                if (reg_val & IXGBE_RXDCTL_ENABLE) {
+                        reg_val &= ~IXGBE_RXDCTL_ENABLE;
+                        IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
+                }
+        }
+
+        IXGBE_WRITE_FLUSH(hw);
+
+        /* Clear interrupt mask to stop from interrupts being generated */
+        IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
+
+        /* Clear any pending interrupts */
+        IXGBE_READ_REG(hw, IXGBE_VTEICR);
+
+        /* Disable the transmit unit.  Each queue must be disabled. */
+        number_of_queues = hw->mac.max_tx_queues;
+        for (i = 0; i < number_of_queues; i++) {
+                reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
+                if (reg_val & IXGBE_TXDCTL_ENABLE) {
+                        reg_val &= ~IXGBE_TXDCTL_ENABLE;
+                        IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
+                }
+        }
+
+        return 0;
+}
+
+/**
+ *  ixgbevf_mta_vector - Determines bit-vector in multicast table to set
+ *  @hw: pointer to hardware structure
+ *  @mc_addr: the multicast address
+ *
+ *  Extracts the 12 bits, from a multicast address, to determine which
+ *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
+ *  incoming rx multicast addresses, to determine the bit-vector to check in
+ *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
+ *  by the MO field of the MCSTCTRL. The MO field is set during initialization
+ *  to mc_filter_type.
+ **/
+static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
+{
+        u32 vector = 0;
+
+        switch (hw->mac.mc_filter_type) {
+        case 0:   /* use bits [47:36] of the address */
+                vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
+                break;
+        case 1:   /* use bits [46:35] of the address */
+                vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
+                break;
+        case 2:   /* use bits [45:34] of the address */
+                vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
+                break;
+        case 3:   /* use bits [43:32] of the address */
+                vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
+                break;
+        default:  /* Invalid mc_filter_type */
+                break;
+        }
+
+        /* vector can only be 12-bits or boundary will be exceeded */
+        vector &= 0xFFF;
+        return vector;
+}
+
+/**
+ *  ixgbevf_get_mac_addr_vf - Read device MAC address
+ *  @hw: pointer to the HW structure
+ *  @mac_addr: pointer to storage for retrieved MAC address
+ **/
+static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
+{
+        memcpy(mac_addr, hw->mac.perm_addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
+
+        return 0;
+}
+
+/**
+ *  ixgbevf_set_rar_vf - set device MAC address
+ *  @hw: pointer to hardware structure
+ *  @index: Receive address register to write
+ *  @addr: Address to put into receive address register
+ *  @vmdq: Unused in this implementation
+ **/
+static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
+                              u32 vmdq)
+{
+        struct ixgbe_mbx_info *mbx = &hw->mbx;
+        u32 msgbuf[3];
+        u8 *msg_addr = (u8 *)(&msgbuf[1]);
+        s32 ret_val;
+
+        memset(msgbuf, 0, sizeof(msgbuf));
+        msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
+        memcpy(msg_addr, addr, 6);
+        ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
+
+        if (!ret_val)
+                ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
+
+        msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+        /* if nacked the address was rejected, use "perm_addr" */
+        if (!ret_val &&
+            (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK)))
+                ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
+
+        return ret_val;
+}
+
+/**
+ *  ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
+ *  @hw: pointer to the HW structure
+ *  @mc_addr_list: array of multicast addresses to program
+ *  @mc_addr_count: number of multicast addresses to program
+ *  @next: caller supplied function to return next address in list
+ *
+ *  Updates the Multicast Table Array.
+ **/
+static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw, u8 *mc_addr_list,
+                                        u32 mc_addr_count,
+                                        ixgbe_mc_addr_itr next)
+{
+        struct ixgbe_mbx_info *mbx = &hw->mbx;
+        u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
+        u16 *vector_list = (u16 *)&msgbuf[1];
+        u32 vector;
+        u32 cnt, i;
+        u32 vmdq;
+
+        /* Each entry in the list uses 1 16 bit word.  We have 30
+         * 16 bit words available in our HW msg buffer (minus 1 for the
+         * msg type).  That's 30 hash values if we pack 'em right.  If
+         * there are more than 30 MC addresses to add then punt the
+         * extras for now and then add code to handle more than 30 later.
+         * It would be unusual for a server to request that many multi-cast
+         * addresses except for in large enterprise network environments.
+         */
+
+        cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
+        msgbuf[0] = IXGBE_VF_SET_MULTICAST;
+        msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
+
+        for (i = 0; i < cnt; i++) {
+                vector = ixgbevf_mta_vector(hw, next(hw, &mc_addr_list, &vmdq));
+                vector_list[i] = vector;
+        }
+
+        mbx->ops.write_posted(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
+
+        return 0;
+}
+
+/**
+ *  ixgbevf_set_vfta_vf - Set/Unset vlan filter table address
+ *  @hw: pointer to the HW structure
+ *  @vlan: 12 bit VLAN ID
+ *  @vind: unused by VF drivers
+ *  @vlan_on: if true then set bit, else clear bit
+ **/
+static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
+                               bool vlan_on)
+{
+        struct ixgbe_mbx_info *mbx = &hw->mbx;
+        u32 msgbuf[2];
+
+        msgbuf[0] = IXGBE_VF_SET_VLAN;
+        msgbuf[1] = vlan;
+        /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
+        msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
+
+        return mbx->ops.write_posted(hw, msgbuf, 2);
+}
+
+/**
+ *  ixgbevf_setup_mac_link_vf - Setup MAC link settings
+ *  @hw: pointer to hardware structure
+ *  @speed: Unused in this implementation
+ *  @autoneg: Unused in this implementation
+ *  @autoneg_wait_to_complete: Unused in this implementation
+ *
+ *  Do nothing and return success.  VF drivers are not allowed to change
+ *  global settings.  Maintained for driver compatibility.
+ **/
+static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
+                                     ixgbe_link_speed speed, bool autoneg,
+                                     bool autoneg_wait_to_complete)
+{
+        return 0;
+}
+
+/**
+ *  ixgbevf_check_mac_link_vf - Get link/speed status
+ *  @hw: pointer to hardware structure
+ *  @speed: pointer to link speed
+ *  @link_up: true is link is up, false otherwise
+ *  @autoneg_wait_to_complete: true when waiting for completion is needed
+ *
+ *  Reads the links register to determine if link is up and the current speed
+ **/
+static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
+                                     ixgbe_link_speed *speed,
+                                     bool *link_up,
+                                     bool autoneg_wait_to_complete)
+{
+        u32 links_reg;
+
+        if (!(hw->mbx.ops.check_for_rst(hw))) {
+                *link_up = false;
+                *speed = 0;
+                return -1;
+        }
+
+        links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+
+        if (links_reg & IXGBE_LINKS_UP)
+                *link_up = true;
+        else
+                *link_up = false;
+
+        if (links_reg & IXGBE_LINKS_SPEED)
+                *speed = IXGBE_LINK_SPEED_10GB_FULL;
+        else
+                *speed = IXGBE_LINK_SPEED_1GB_FULL;
+
+        return 0;
+}
+
+struct ixgbe_mac_operations ixgbevf_mac_ops = {
+        .init_hw             = ixgbevf_init_hw_vf,
+        .reset_hw            = ixgbevf_reset_hw_vf,
+        .start_hw            = ixgbevf_start_hw_vf,
+        .get_mac_addr        = ixgbevf_get_mac_addr_vf,
+        .stop_adapter        = ixgbevf_stop_hw_vf,
+        .setup_link          = ixgbevf_setup_mac_link_vf,
+        .check_link          = ixgbevf_check_mac_link_vf,
+        .set_rar             = ixgbevf_set_rar_vf,
+        .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
+        .set_vfta            = ixgbevf_set_vfta_vf,
+};
+
+struct ixgbevf_info ixgbevf_vf_info = {
+        .mac = ixgbe_mac_82599_vf,
+        .mac_ops = &ixgbevf_mac_ops,
+};
+
diff --git a/drivers/net/ixgbevf/vf.h b/drivers/net/ixgbevf/vf.h
new file mode 100644
index 000000000000..799600e92700
--- /dev/null
+++ b/drivers/net/ixgbevf/vf.h
@@ -0,0 +1,168 @@
+/*******************************************************************************
+
+  Intel 82599 Virtual Function driver
+  Copyright(c) 1999 - 2009 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:
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#ifndef __IXGBE_VF_H__
+#define __IXGBE_VF_H__
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+
+#include "defines.h"
+#include "regs.h"
+#include "mbx.h"
+
+struct ixgbe_hw;
+
+/* iterator type for walking multicast address lists */
+typedef u8* (*ixgbe_mc_addr_itr) (struct ixgbe_hw *hw, u8 **mc_addr_ptr,
+                                  u32 *vmdq);
+struct ixgbe_mac_operations {
+        s32 (*init_hw)(struct ixgbe_hw *);
+        s32 (*reset_hw)(struct ixgbe_hw *);
+        s32 (*start_hw)(struct ixgbe_hw *);
+        s32 (*clear_hw_cntrs)(struct ixgbe_hw *);
+        enum ixgbe_media_type (*get_media_type)(struct ixgbe_hw *);
+        u32 (*get_supported_physical_layer)(struct ixgbe_hw *);
+        s32 (*get_mac_addr)(struct ixgbe_hw *, u8 *);
+        s32 (*stop_adapter)(struct ixgbe_hw *);
+        s32 (*get_bus_info)(struct ixgbe_hw *);
+
+        /* Link */
+        s32 (*setup_link)(struct ixgbe_hw *, ixgbe_link_speed, bool, bool);
+        s32 (*check_link)(struct ixgbe_hw *, ixgbe_link_speed *, bool *, bool);
+        s32 (*get_link_capabilities)(struct ixgbe_hw *, ixgbe_link_speed *,
+                                     bool *);
+
+        /* RAR, Multicast, VLAN */
+        s32 (*set_rar)(struct ixgbe_hw *, u32, u8 *, u32);
+        s32 (*init_rx_addrs)(struct ixgbe_hw *);
+        s32 (*update_mc_addr_list)(struct ixgbe_hw *, u8 *, u32,
+                                   ixgbe_mc_addr_itr);
+        s32 (*enable_mc)(struct ixgbe_hw *);
+        s32 (*disable_mc)(struct ixgbe_hw *);
+        s32 (*clear_vfta)(struct ixgbe_hw *);
+        s32 (*set_vfta)(struct ixgbe_hw *, u32, u32, bool);
+};
+
+enum ixgbe_mac_type {
+        ixgbe_mac_unknown = 0,
+        ixgbe_mac_82599_vf,
+        ixgbe_num_macs
+};
+
+struct ixgbe_mac_info {
+        struct ixgbe_mac_operations ops;
+        u8 addr[6];
+        u8 perm_addr[6];
+
+        enum ixgbe_mac_type type;
+
+        s32  mc_filter_type;
+
+        bool get_link_status;
+        u32  max_tx_queues;
+        u32  max_rx_queues;
+        u32  max_msix_vectors;
+};
+
+struct ixgbe_mbx_operations {
+        s32 (*init_params)(struct ixgbe_hw *hw);
+        s32 (*read)(struct ixgbe_hw *, u32 *, u16);
+        s32 (*write)(struct ixgbe_hw *, u32 *, u16);
+        s32 (*read_posted)(struct ixgbe_hw *, u32 *, u16);
+        s32 (*write_posted)(struct ixgbe_hw *, u32 *, u16);
+        s32 (*check_for_msg)(struct ixgbe_hw *);
+        s32 (*check_for_ack)(struct ixgbe_hw *);
+        s32 (*check_for_rst)(struct ixgbe_hw *);
+};
+
+struct ixgbe_mbx_stats {
+        u32 msgs_tx;
+        u32 msgs_rx;
+
+        u32 acks;
+        u32 reqs;
+        u32 rsts;
+};
+
+struct ixgbe_mbx_info {
+        struct ixgbe_mbx_operations ops;
+        struct ixgbe_mbx_stats stats;
+        u32 timeout;
+        u32 udelay;
+        u32 v2p_mailbox;
+        u16 size;
+};
+
+struct ixgbe_hw {
+        void *back;
+
+        u8 __iomem *hw_addr;
+        u8 *flash_address;
+        unsigned long io_base;
+
+        struct ixgbe_mac_info mac;
+        struct ixgbe_mbx_info mbx;
+
+        u16 device_id;
+        u16 subsystem_vendor_id;
+        u16 subsystem_device_id;
+        u16 vendor_id;
+
+        u8  revision_id;
+        bool adapter_stopped;
+};
+
+struct ixgbevf_hw_stats {
+        u64 base_vfgprc;
+        u64 base_vfgptc;
+        u64 base_vfgorc;
+        u64 base_vfgotc;
+        u64 base_vfmprc;
+
+        u64 last_vfgprc;
+        u64 last_vfgptc;
+        u64 last_vfgorc;
+        u64 last_vfgotc;
+        u64 last_vfmprc;
+
+        u64 vfgprc;
+        u64 vfgptc;
+        u64 vfgorc;
+        u64 vfgotc;
+        u64 vfmprc;
+};
+
+struct ixgbevf_info {
+        enum ixgbe_mac_type             mac;
+        struct ixgbe_mac_operations     *mac_ops;
+};
+
+#endif /* __IXGBE_VF_H__ */
+