431 lines
12 KiB
C
431 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2009 - 2018 Intel Corporation. */
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#include <linux/etherdevice.h>
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#include "vf.h"
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static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
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static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
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u16 *duplex);
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static s32 e1000_init_hw_vf(struct e1000_hw *hw);
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static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
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static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *,
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u32, u32, u32);
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static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
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static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
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static s32 e1000_set_uc_addr_vf(struct e1000_hw *hw, u32 subcmd, u8 *addr);
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static s32 e1000_set_vfta_vf(struct e1000_hw *, u16, bool);
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/**
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* e1000_init_mac_params_vf - Inits MAC params
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* @hw: pointer to the HW structure
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**/
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static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
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{
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struct e1000_mac_info *mac = &hw->mac;
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/* VF's have no MTA Registers - PF feature only */
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mac->mta_reg_count = 128;
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/* VF's have no access to RAR entries */
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mac->rar_entry_count = 1;
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/* Function pointers */
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/* reset */
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mac->ops.reset_hw = e1000_reset_hw_vf;
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/* hw initialization */
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mac->ops.init_hw = e1000_init_hw_vf;
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/* check for link */
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mac->ops.check_for_link = e1000_check_for_link_vf;
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/* link info */
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mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
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/* multicast address update */
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mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
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/* set mac address */
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mac->ops.rar_set = e1000_rar_set_vf;
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/* read mac address */
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mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
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/* set mac filter */
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mac->ops.set_uc_addr = e1000_set_uc_addr_vf;
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/* set vlan filter table array */
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mac->ops.set_vfta = e1000_set_vfta_vf;
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return E1000_SUCCESS;
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}
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/**
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* e1000_init_function_pointers_vf - Inits function pointers
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* @hw: pointer to the HW structure
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**/
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void e1000_init_function_pointers_vf(struct e1000_hw *hw)
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{
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hw->mac.ops.init_params = e1000_init_mac_params_vf;
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hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
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}
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/**
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* e1000_get_link_up_info_vf - Gets link info.
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* @hw: pointer to the HW structure
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* @speed: pointer to 16 bit value to store link speed.
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* @duplex: pointer to 16 bit value to store duplex.
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*
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* Since we cannot read the PHY and get accurate link info, we must rely upon
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* the status register's data which is often stale and inaccurate.
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**/
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static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
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u16 *duplex)
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{
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s32 status;
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status = er32(STATUS);
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if (status & E1000_STATUS_SPEED_1000)
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*speed = SPEED_1000;
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else if (status & E1000_STATUS_SPEED_100)
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*speed = SPEED_100;
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else
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*speed = SPEED_10;
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if (status & E1000_STATUS_FD)
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*duplex = FULL_DUPLEX;
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else
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*duplex = HALF_DUPLEX;
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return E1000_SUCCESS;
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}
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/**
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* e1000_reset_hw_vf - Resets the HW
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* @hw: pointer to the HW structure
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*
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* VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
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* This is all the reset we can perform on a VF.
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**/
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static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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u32 timeout = E1000_VF_INIT_TIMEOUT;
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u32 ret_val = -E1000_ERR_MAC_INIT;
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u32 msgbuf[3];
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u8 *addr = (u8 *)(&msgbuf[1]);
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u32 ctrl;
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/* assert VF queue/interrupt reset */
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ctrl = er32(CTRL);
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ew32(CTRL, ctrl | E1000_CTRL_RST);
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/* we cannot initialize while the RSTI / RSTD bits are asserted */
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while (!mbx->ops.check_for_rst(hw) && timeout) {
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timeout--;
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udelay(5);
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}
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if (timeout) {
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/* mailbox timeout can now become active */
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mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
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/* notify PF of VF reset completion */
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msgbuf[0] = E1000_VF_RESET;
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mbx->ops.write_posted(hw, msgbuf, 1);
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mdelay(10);
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/* set our "perm_addr" based on info provided by PF */
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ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
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if (!ret_val) {
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switch (msgbuf[0]) {
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case E1000_VF_RESET | E1000_VT_MSGTYPE_ACK:
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memcpy(hw->mac.perm_addr, addr, ETH_ALEN);
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break;
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case E1000_VF_RESET | E1000_VT_MSGTYPE_NACK:
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eth_zero_addr(hw->mac.perm_addr);
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break;
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default:
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ret_val = -E1000_ERR_MAC_INIT;
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}
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}
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}
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return ret_val;
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}
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/**
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* e1000_init_hw_vf - Inits the HW
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* @hw: pointer to the HW structure
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*
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* Not much to do here except clear the PF Reset indication if there is one.
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**/
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static s32 e1000_init_hw_vf(struct e1000_hw *hw)
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{
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/* attempt to set and restore our mac address */
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e1000_rar_set_vf(hw, hw->mac.addr, 0);
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return E1000_SUCCESS;
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}
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/**
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* e1000_hash_mc_addr_vf - Generate a multicast hash value
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* @hw: pointer to the HW structure
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* @mc_addr: pointer to a multicast address
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*
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* Generates a multicast address hash value which is used to determine
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* the multicast filter table array address and new table value. See
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* e1000_mta_set_generic()
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**/
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static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
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{
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u32 hash_value, hash_mask;
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u8 bit_shift = 0;
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/* Register count multiplied by bits per register */
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hash_mask = (hw->mac.mta_reg_count * 32) - 1;
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/* The bit_shift is the number of left-shifts
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* where 0xFF would still fall within the hash mask.
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*/
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while (hash_mask >> bit_shift != 0xFF)
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bit_shift++;
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hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
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(((u16)mc_addr[5]) << bit_shift)));
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return hash_value;
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}
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/**
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* e1000_update_mc_addr_list_vf - Update Multicast addresses
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* @hw: pointer to the HW structure
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* @mc_addr_list: array of multicast addresses to program
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* @mc_addr_count: number of multicast addresses to program
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* @rar_used_count: the first RAR register free to program
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* @rar_count: total number of supported Receive Address Registers
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*
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* Updates the Receive Address Registers and Multicast Table Array.
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* The caller must have a packed mc_addr_list of multicast addresses.
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* The parameter rar_count will usually be hw->mac.rar_entry_count
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* unless there are workarounds that change this.
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**/
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static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
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u8 *mc_addr_list, u32 mc_addr_count,
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u32 rar_used_count, u32 rar_count)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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u32 msgbuf[E1000_VFMAILBOX_SIZE];
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u16 *hash_list = (u16 *)&msgbuf[1];
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u32 hash_value;
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u32 cnt, i;
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s32 ret_val;
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/* Each entry in the list uses 1 16 bit word. We have 30
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* 16 bit words available in our HW msg buffer (minus 1 for the
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* msg type). That's 30 hash values if we pack 'em right. If
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* there are more than 30 MC addresses to add then punt the
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* extras for now and then add code to handle more than 30 later.
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* It would be unusual for a server to request that many multi-cast
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* addresses except for in large enterprise network environments.
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*/
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cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
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msgbuf[0] = E1000_VF_SET_MULTICAST;
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msgbuf[0] |= cnt << E1000_VT_MSGINFO_SHIFT;
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for (i = 0; i < cnt; i++) {
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hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
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hash_list[i] = hash_value & 0x0FFFF;
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mc_addr_list += ETH_ALEN;
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}
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ret_val = mbx->ops.write_posted(hw, msgbuf, E1000_VFMAILBOX_SIZE);
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if (!ret_val)
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mbx->ops.read_posted(hw, msgbuf, 1);
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}
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/**
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* e1000_set_vfta_vf - Set/Unset vlan filter table address
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* @hw: pointer to the HW structure
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* @vid: determines the vfta register and bit to set/unset
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* @set: if true then set bit, else clear bit
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**/
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static s32 e1000_set_vfta_vf(struct e1000_hw *hw, u16 vid, bool set)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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u32 msgbuf[2];
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s32 err;
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msgbuf[0] = E1000_VF_SET_VLAN;
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msgbuf[1] = vid;
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/* Setting the 8 bit field MSG INFO to true indicates "add" */
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if (set)
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msgbuf[0] |= BIT(E1000_VT_MSGINFO_SHIFT);
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mbx->ops.write_posted(hw, msgbuf, 2);
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err = mbx->ops.read_posted(hw, msgbuf, 2);
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msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
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/* if nacked the vlan was rejected */
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if (!err && (msgbuf[0] == (E1000_VF_SET_VLAN | E1000_VT_MSGTYPE_NACK)))
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err = -E1000_ERR_MAC_INIT;
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return err;
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}
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/**
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* e1000_rlpml_set_vf - Set the maximum receive packet length
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* @hw: pointer to the HW structure
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* @max_size: value to assign to max frame size
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**/
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void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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u32 msgbuf[2];
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s32 ret_val;
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msgbuf[0] = E1000_VF_SET_LPE;
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msgbuf[1] = max_size;
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ret_val = mbx->ops.write_posted(hw, msgbuf, 2);
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if (!ret_val)
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mbx->ops.read_posted(hw, msgbuf, 1);
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}
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/**
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* e1000_rar_set_vf - set device MAC address
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* @hw: pointer to the HW structure
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* @addr: pointer to the receive address
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* @index: receive address array register
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**/
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static void e1000_rar_set_vf(struct e1000_hw *hw, u8 *addr, u32 index)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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u32 msgbuf[3];
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u8 *msg_addr = (u8 *)(&msgbuf[1]);
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s32 ret_val;
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memset(msgbuf, 0, 12);
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msgbuf[0] = E1000_VF_SET_MAC_ADDR;
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memcpy(msg_addr, addr, ETH_ALEN);
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ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
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if (!ret_val)
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ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
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msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
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/* if nacked the address was rejected, use "perm_addr" */
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if (!ret_val &&
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(msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
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e1000_read_mac_addr_vf(hw);
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}
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/**
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* e1000_read_mac_addr_vf - Read device MAC address
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* @hw: pointer to the HW structure
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**/
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static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
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{
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memcpy(hw->mac.addr, hw->mac.perm_addr, ETH_ALEN);
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return E1000_SUCCESS;
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}
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/**
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* e1000_set_uc_addr_vf - Set or clear unicast filters
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* @hw: pointer to the HW structure
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* @sub_cmd: add or clear filters
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* @addr: pointer to the filter MAC address
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**/
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static s32 e1000_set_uc_addr_vf(struct e1000_hw *hw, u32 sub_cmd, u8 *addr)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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u32 msgbuf[3], msgbuf_chk;
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u8 *msg_addr = (u8 *)(&msgbuf[1]);
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s32 ret_val;
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memset(msgbuf, 0, sizeof(msgbuf));
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msgbuf[0] |= sub_cmd;
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msgbuf[0] |= E1000_VF_SET_MAC_ADDR;
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msgbuf_chk = msgbuf[0];
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if (addr)
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memcpy(msg_addr, addr, ETH_ALEN);
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ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
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if (!ret_val)
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ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
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msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
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if (!ret_val) {
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msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
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if (msgbuf[0] == (msgbuf_chk | E1000_VT_MSGTYPE_NACK))
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return -ENOSPC;
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}
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return ret_val;
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}
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/**
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* e1000_check_for_link_vf - Check for link for a virtual interface
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* @hw: pointer to the HW structure
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*
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* Checks to see if the underlying PF is still talking to the VF and
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* if it is then it reports the link state to the hardware, otherwise
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* it reports link down and returns an error.
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**/
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static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
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{
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struct e1000_mbx_info *mbx = &hw->mbx;
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struct e1000_mac_info *mac = &hw->mac;
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s32 ret_val = E1000_SUCCESS;
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u32 in_msg = 0;
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/* We only want to run this if there has been a rst asserted.
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* in this case that could mean a link change, device reset,
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* or a virtual function reset
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*/
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/* If we were hit with a reset or timeout drop the link */
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if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
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mac->get_link_status = true;
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if (!mac->get_link_status)
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goto out;
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/* if link status is down no point in checking to see if PF is up */
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if (!(er32(STATUS) & E1000_STATUS_LU))
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goto out;
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/* if the read failed it could just be a mailbox collision, best wait
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* until we are called again and don't report an error
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*/
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if (mbx->ops.read(hw, &in_msg, 1))
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goto out;
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/* if incoming message isn't clear to send we are waiting on response */
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if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
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/* msg is not CTS and is NACK we must have lost CTS status */
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if (in_msg & E1000_VT_MSGTYPE_NACK)
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ret_val = -E1000_ERR_MAC_INIT;
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goto out;
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}
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/* the PF is talking, if we timed out in the past we reinit */
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if (!mbx->timeout) {
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ret_val = -E1000_ERR_MAC_INIT;
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goto out;
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}
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/* if we passed all the tests above then the link is up and we no
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* longer need to check for link
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*/
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mac->get_link_status = false;
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out:
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return ret_val;
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}
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