1049 lines
30 KiB
C
1049 lines
30 KiB
C
/*-
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* Copyright 2021 Intel Corp
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* Copyright 2021 Rubicon Communications, LLC (Netgate)
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <sys/cdefs.h>
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#include "igc_api.h"
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static void igc_config_collision_dist_generic(struct igc_hw *hw);
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/**
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* igc_init_mac_ops_generic - Initialize MAC function pointers
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* @hw: pointer to the HW structure
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*
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* Setups up the function pointers to no-op functions
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**/
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void igc_init_mac_ops_generic(struct igc_hw *hw)
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{
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struct igc_mac_info *mac = &hw->mac;
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DEBUGFUNC("igc_init_mac_ops_generic");
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/* General Setup */
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mac->ops.init_params = igc_null_ops_generic;
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mac->ops.config_collision_dist = igc_config_collision_dist_generic;
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mac->ops.rar_set = igc_rar_set_generic;
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}
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/**
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* igc_null_ops_generic - No-op function, returns 0
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* @hw: pointer to the HW structure
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**/
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s32 igc_null_ops_generic(struct igc_hw IGC_UNUSEDARG *hw)
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{
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DEBUGFUNC("igc_null_ops_generic");
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return IGC_SUCCESS;
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}
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/**
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* igc_null_mac_generic - No-op function, return void
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* @hw: pointer to the HW structure
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**/
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void igc_null_mac_generic(struct igc_hw IGC_UNUSEDARG *hw)
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{
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DEBUGFUNC("igc_null_mac_generic");
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return;
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}
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/**
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* igc_null_link_info - No-op function, return 0
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* @hw: pointer to the HW structure
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* @s: dummy variable
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* @d: dummy variable
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**/
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s32 igc_null_link_info(struct igc_hw IGC_UNUSEDARG *hw,
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u16 IGC_UNUSEDARG *s, u16 IGC_UNUSEDARG *d)
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{
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DEBUGFUNC("igc_null_link_info");
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return IGC_SUCCESS;
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}
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/**
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* igc_null_mng_mode - No-op function, return false
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* @hw: pointer to the HW structure
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**/
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bool igc_null_mng_mode(struct igc_hw IGC_UNUSEDARG *hw)
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{
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DEBUGFUNC("igc_null_mng_mode");
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return false;
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}
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/**
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* igc_null_update_mc - No-op function, return void
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* @hw: pointer to the HW structure
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* @h: dummy variable
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* @a: dummy variable
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**/
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void igc_null_update_mc(struct igc_hw IGC_UNUSEDARG *hw,
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u8 IGC_UNUSEDARG *h, u32 IGC_UNUSEDARG a)
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{
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DEBUGFUNC("igc_null_update_mc");
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return;
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}
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/**
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* igc_null_write_vfta - No-op function, return void
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* @hw: pointer to the HW structure
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* @a: dummy variable
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* @b: dummy variable
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**/
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void igc_null_write_vfta(struct igc_hw IGC_UNUSEDARG *hw,
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u32 IGC_UNUSEDARG a, u32 IGC_UNUSEDARG b)
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{
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DEBUGFUNC("igc_null_write_vfta");
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return;
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}
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/**
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* igc_null_rar_set - No-op function, return 0
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* @hw: pointer to the HW structure
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* @h: dummy variable
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* @a: dummy variable
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**/
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int igc_null_rar_set(struct igc_hw IGC_UNUSEDARG *hw,
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u8 IGC_UNUSEDARG *h, u32 IGC_UNUSEDARG a)
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{
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DEBUGFUNC("igc_null_rar_set");
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return IGC_SUCCESS;
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}
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/**
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* igc_set_lan_id_single_port - Set LAN id for a single port device
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* @hw: pointer to the HW structure
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*
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* Sets the LAN function id to zero for a single port device.
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**/
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void igc_set_lan_id_single_port(struct igc_hw *hw)
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{
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struct igc_bus_info *bus = &hw->bus;
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bus->func = 0;
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}
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/**
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* igc_clear_vfta_generic - Clear VLAN filter table
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* @hw: pointer to the HW structure
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*
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* Clears the register array which contains the VLAN filter table by
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* setting all the values to 0.
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**/
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void igc_clear_vfta_generic(struct igc_hw *hw)
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{
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u32 offset;
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DEBUGFUNC("igc_clear_vfta_generic");
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for (offset = 0; offset < IGC_VLAN_FILTER_TBL_SIZE; offset++) {
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IGC_WRITE_REG_ARRAY(hw, IGC_VFTA, offset, 0);
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IGC_WRITE_FLUSH(hw);
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}
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}
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/**
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* igc_write_vfta_generic - Write value to VLAN filter table
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* @hw: pointer to the HW structure
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* @offset: register offset in VLAN filter table
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* @value: register value written to VLAN filter table
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*
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* Writes value at the given offset in the register array which stores
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* the VLAN filter table.
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**/
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void igc_write_vfta_generic(struct igc_hw *hw, u32 offset, u32 value)
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{
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DEBUGFUNC("igc_write_vfta_generic");
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IGC_WRITE_REG_ARRAY(hw, IGC_VFTA, offset, value);
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IGC_WRITE_FLUSH(hw);
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}
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/**
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* igc_init_rx_addrs_generic - Initialize receive address's
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* @hw: pointer to the HW structure
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* @rar_count: receive address registers
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*
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* Setup the receive address registers by setting the base receive address
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* register to the devices MAC address and clearing all the other receive
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* address registers to 0.
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**/
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void igc_init_rx_addrs_generic(struct igc_hw *hw, u16 rar_count)
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{
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u32 i;
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u8 mac_addr[ETH_ADDR_LEN] = {0};
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DEBUGFUNC("igc_init_rx_addrs_generic");
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/* Setup the receive address */
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DEBUGOUT("Programming MAC Address into RAR[0]\n");
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hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
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/* Zero out the other (rar_entry_count - 1) receive addresses */
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DEBUGOUT1("Clearing RAR[1-%u]\n", rar_count-1);
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for (i = 1; i < rar_count; i++)
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hw->mac.ops.rar_set(hw, mac_addr, i);
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}
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/**
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* igc_check_alt_mac_addr_generic - Check for alternate MAC addr
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* @hw: pointer to the HW structure
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*
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* Checks the nvm for an alternate MAC address. An alternate MAC address
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* can be setup by pre-boot software and must be treated like a permanent
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* address and must override the actual permanent MAC address. If an
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* alternate MAC address is found it is programmed into RAR0, replacing
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* the permanent address that was installed into RAR0 by the Si on reset.
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* This function will return SUCCESS unless it encounters an error while
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* reading the EEPROM.
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**/
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s32 igc_check_alt_mac_addr_generic(struct igc_hw *hw)
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{
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u32 i;
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s32 ret_val;
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u16 offset, nvm_alt_mac_addr_offset, nvm_data;
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u8 alt_mac_addr[ETH_ADDR_LEN];
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DEBUGFUNC("igc_check_alt_mac_addr_generic");
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ret_val = hw->nvm.ops.read(hw, NVM_COMPAT, 1, &nvm_data);
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if (ret_val)
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return ret_val;
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ret_val = hw->nvm.ops.read(hw, NVM_ALT_MAC_ADDR_PTR, 1,
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&nvm_alt_mac_addr_offset);
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if (ret_val) {
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DEBUGOUT("NVM Read Error\n");
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return ret_val;
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}
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if ((nvm_alt_mac_addr_offset == 0xFFFF) ||
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(nvm_alt_mac_addr_offset == 0x0000))
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/* There is no Alternate MAC Address */
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return IGC_SUCCESS;
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if (hw->bus.func == IGC_FUNC_1)
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nvm_alt_mac_addr_offset += IGC_ALT_MAC_ADDRESS_OFFSET_LAN1;
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for (i = 0; i < ETH_ADDR_LEN; i += 2) {
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offset = nvm_alt_mac_addr_offset + (i >> 1);
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ret_val = hw->nvm.ops.read(hw, offset, 1, &nvm_data);
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if (ret_val) {
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DEBUGOUT("NVM Read Error\n");
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return ret_val;
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}
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alt_mac_addr[i] = (u8)(nvm_data & 0xFF);
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alt_mac_addr[i + 1] = (u8)(nvm_data >> 8);
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}
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/* if multicast bit is set, the alternate address will not be used */
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if (alt_mac_addr[0] & 0x01) {
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DEBUGOUT("Ignoring Alternate Mac Address with MC bit set\n");
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return IGC_SUCCESS;
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}
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/* We have a valid alternate MAC address, and we want to treat it the
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* same as the normal permanent MAC address stored by the HW into the
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* RAR. Do this by mapping this address into RAR0.
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*/
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hw->mac.ops.rar_set(hw, alt_mac_addr, 0);
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return IGC_SUCCESS;
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}
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/**
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* igc_rar_set_generic - Set receive address register
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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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* Sets the receive address array register at index to the address passed
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* in by addr.
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**/
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int igc_rar_set_generic(struct igc_hw *hw, u8 *addr, u32 index)
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{
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u32 rar_low, rar_high;
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DEBUGFUNC("igc_rar_set_generic");
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/* HW expects these in little endian so we reverse the byte order
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* from network order (big endian) to little endian
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*/
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rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) |
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((u32) addr[2] << 16) | ((u32) addr[3] << 24));
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rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
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/* If MAC address zero, no need to set the AV bit */
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if (rar_low || rar_high)
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rar_high |= IGC_RAH_AV;
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/* Some bridges will combine consecutive 32-bit writes into
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* a single burst write, which will malfunction on some parts.
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* The flushes avoid this.
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*/
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IGC_WRITE_REG(hw, IGC_RAL(index), rar_low);
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IGC_WRITE_FLUSH(hw);
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IGC_WRITE_REG(hw, IGC_RAH(index), rar_high);
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IGC_WRITE_FLUSH(hw);
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return IGC_SUCCESS;
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}
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/**
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* igc_hash_mc_addr_generic - 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.
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**/
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u32 igc_hash_mc_addr_generic(struct igc_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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DEBUGFUNC("igc_hash_mc_addr_generic");
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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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/* For a mc_filter_type of 0, 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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/* The portion of the address that is used for the hash table
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* is determined by the mc_filter_type setting.
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* The algorithm is such that there is a total of 8 bits of shifting.
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* The bit_shift for a mc_filter_type of 0 represents the number of
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* left-shifts where the MSB of mc_addr[5] would still fall within
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* the hash_mask. Case 0 does this exactly. Since there are a total
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* of 8 bits of shifting, then mc_addr[4] will shift right the
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* remaining number of bits. Thus 8 - bit_shift. The rest of the
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* cases are a variation of this algorithm...essentially raising the
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* number of bits to shift mc_addr[5] left, while still keeping the
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* 8-bit shifting total.
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*
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* For example, given the following Destination MAC Address and an
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* mta register count of 128 (thus a 4096-bit vector and 0xFFF mask),
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* we can see that the bit_shift for case 0 is 4. These are the hash
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* values resulting from each mc_filter_type...
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* [0] [1] [2] [3] [4] [5]
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* 01 AA 00 12 34 56
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* LSB MSB
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*
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* case 0: hash_value = ((0x34 >> 4) | (0x56 << 4)) & 0xFFF = 0x563
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* case 1: hash_value = ((0x34 >> 3) | (0x56 << 5)) & 0xFFF = 0xAC6
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* case 2: hash_value = ((0x34 >> 2) | (0x56 << 6)) & 0xFFF = 0x163
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* case 3: hash_value = ((0x34 >> 0) | (0x56 << 8)) & 0xFFF = 0x634
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*/
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switch (hw->mac.mc_filter_type) {
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default:
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case 0:
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break;
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case 1:
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bit_shift += 1;
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break;
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case 2:
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bit_shift += 2;
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break;
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case 3:
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bit_shift += 4;
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break;
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}
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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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* igc_update_mc_addr_list_generic - 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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*
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* Updates entire Multicast Table Array.
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* The caller must have a packed mc_addr_list of multicast addresses.
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**/
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void igc_update_mc_addr_list_generic(struct igc_hw *hw,
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u8 *mc_addr_list, u32 mc_addr_count)
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{
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u32 hash_value, hash_bit, hash_reg;
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int i;
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DEBUGFUNC("igc_update_mc_addr_list_generic");
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/* clear mta_shadow */
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memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
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/* update mta_shadow from mc_addr_list */
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for (i = 0; (u32) i < mc_addr_count; i++) {
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hash_value = igc_hash_mc_addr_generic(hw, mc_addr_list);
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hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
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hash_bit = hash_value & 0x1F;
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hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
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mc_addr_list += (ETH_ADDR_LEN);
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}
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/* replace the entire MTA table */
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for (i = hw->mac.mta_reg_count - 1; i >= 0; i--)
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IGC_WRITE_REG_ARRAY(hw, IGC_MTA, i, hw->mac.mta_shadow[i]);
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IGC_WRITE_FLUSH(hw);
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}
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/**
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* igc_clear_hw_cntrs_base_generic - Clear base hardware counters
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* @hw: pointer to the HW structure
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*
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* Clears the base hardware counters by reading the counter registers.
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**/
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void igc_clear_hw_cntrs_base_generic(struct igc_hw *hw)
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{
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DEBUGFUNC("igc_clear_hw_cntrs_base_generic");
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IGC_READ_REG(hw, IGC_CRCERRS);
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IGC_READ_REG(hw, IGC_MPC);
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IGC_READ_REG(hw, IGC_SCC);
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IGC_READ_REG(hw, IGC_ECOL);
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IGC_READ_REG(hw, IGC_MCC);
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IGC_READ_REG(hw, IGC_LATECOL);
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IGC_READ_REG(hw, IGC_COLC);
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IGC_READ_REG(hw, IGC_RERC);
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IGC_READ_REG(hw, IGC_DC);
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IGC_READ_REG(hw, IGC_RLEC);
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IGC_READ_REG(hw, IGC_XONRXC);
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IGC_READ_REG(hw, IGC_XONTXC);
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IGC_READ_REG(hw, IGC_XOFFRXC);
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IGC_READ_REG(hw, IGC_XOFFTXC);
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IGC_READ_REG(hw, IGC_FCRUC);
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IGC_READ_REG(hw, IGC_GPRC);
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IGC_READ_REG(hw, IGC_BPRC);
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IGC_READ_REG(hw, IGC_MPRC);
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IGC_READ_REG(hw, IGC_GPTC);
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IGC_READ_REG(hw, IGC_GORCL);
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IGC_READ_REG(hw, IGC_GORCH);
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IGC_READ_REG(hw, IGC_GOTCL);
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IGC_READ_REG(hw, IGC_GOTCH);
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IGC_READ_REG(hw, IGC_RNBC);
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IGC_READ_REG(hw, IGC_RUC);
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IGC_READ_REG(hw, IGC_RFC);
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IGC_READ_REG(hw, IGC_ROC);
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IGC_READ_REG(hw, IGC_RJC);
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IGC_READ_REG(hw, IGC_TORL);
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IGC_READ_REG(hw, IGC_TORH);
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IGC_READ_REG(hw, IGC_TOTL);
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IGC_READ_REG(hw, IGC_TOTH);
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IGC_READ_REG(hw, IGC_TPR);
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IGC_READ_REG(hw, IGC_TPT);
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IGC_READ_REG(hw, IGC_MPTC);
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IGC_READ_REG(hw, IGC_BPTC);
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IGC_READ_REG(hw, IGC_TLPIC);
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IGC_READ_REG(hw, IGC_RLPIC);
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IGC_READ_REG(hw, IGC_RXDMTC);
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}
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/**
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* igc_check_for_copper_link_generic - Check for link (Copper)
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* @hw: pointer to the HW structure
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*
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* Checks to see of the link status of the hardware has changed. If a
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* change in link status has been detected, then we read the PHY registers
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* to get the current speed/duplex if link exists.
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**/
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s32 igc_check_for_copper_link_generic(struct igc_hw *hw)
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{
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struct igc_mac_info *mac = &hw->mac;
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s32 ret_val;
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bool link = false;
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DEBUGFUNC("igc_check_for_copper_link");
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/* We only want to go out to the PHY registers to see if Auto-Neg
|
|
* has completed and/or if our link status has changed. The
|
|
* get_link_status flag is set upon receiving a Link Status
|
|
* Change or Rx Sequence Error interrupt.
|
|
*/
|
|
if (!mac->get_link_status)
|
|
return IGC_SUCCESS;
|
|
|
|
/* First we want to see if the MII Status Register reports
|
|
* link. If so, then we want to get the current speed/duplex
|
|
* of the PHY.
|
|
*/
|
|
ret_val = igc_phy_has_link_generic(hw, 1, 0, &link);
|
|
if (ret_val)
|
|
return ret_val;
|
|
|
|
if (!link)
|
|
return IGC_SUCCESS; /* No link detected */
|
|
|
|
mac->get_link_status = false;
|
|
|
|
/* Check if there was DownShift, must be checked
|
|
* immediately after link-up
|
|
*/
|
|
igc_check_downshift_generic(hw);
|
|
|
|
/* If we are forcing speed/duplex, then we simply return since
|
|
* we have already determined whether we have link or not.
|
|
*/
|
|
if (!mac->autoneg)
|
|
return -IGC_ERR_CONFIG;
|
|
|
|
/* Auto-Neg is enabled. Auto Speed Detection takes care
|
|
* of MAC speed/duplex configuration. So we only need to
|
|
* configure Collision Distance in the MAC.
|
|
*/
|
|
mac->ops.config_collision_dist(hw);
|
|
|
|
/* Configure Flow Control now that Auto-Neg has completed.
|
|
* First, we need to restore the desired flow control
|
|
* settings because we may have had to re-autoneg with a
|
|
* different link partner.
|
|
*/
|
|
ret_val = igc_config_fc_after_link_up_generic(hw);
|
|
if (ret_val)
|
|
DEBUGOUT("Error configuring flow control\n");
|
|
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* igc_setup_link_generic - Setup flow control and link settings
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Determines which flow control settings to use, then configures flow
|
|
* control. Calls the appropriate media-specific link configuration
|
|
* function. Assuming the adapter has a valid link partner, a valid link
|
|
* should be established. Assumes the hardware has previously been reset
|
|
* and the transmitter and receiver are not enabled.
|
|
**/
|
|
s32 igc_setup_link_generic(struct igc_hw *hw)
|
|
{
|
|
s32 ret_val;
|
|
|
|
DEBUGFUNC("igc_setup_link_generic");
|
|
|
|
/* In the case of the phy reset being blocked, we already have a link.
|
|
* We do not need to set it up again.
|
|
*/
|
|
if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
|
|
return IGC_SUCCESS;
|
|
|
|
/* If requested flow control is set to default, set flow control
|
|
* for both 'rx' and 'tx' pause frames.
|
|
*/
|
|
if (hw->fc.requested_mode == igc_fc_default) {
|
|
hw->fc.requested_mode = igc_fc_full;
|
|
}
|
|
|
|
/* Save off the requested flow control mode for use later. Depending
|
|
* on the link partner's capabilities, we may or may not use this mode.
|
|
*/
|
|
hw->fc.current_mode = hw->fc.requested_mode;
|
|
|
|
DEBUGOUT1("After fix-ups FlowControl is now = %x\n",
|
|
hw->fc.current_mode);
|
|
|
|
/* Call the necessary media_type subroutine to configure the link. */
|
|
ret_val = hw->mac.ops.setup_physical_interface(hw);
|
|
if (ret_val)
|
|
return ret_val;
|
|
|
|
/* Initialize the flow control address, type, and PAUSE timer
|
|
* registers to their default values. This is done even if flow
|
|
* control is disabled, because it does not hurt anything to
|
|
* initialize these registers.
|
|
*/
|
|
DEBUGOUT("Initializing the Flow Control address, type and timer regs\n");
|
|
IGC_WRITE_REG(hw, IGC_FCT, FLOW_CONTROL_TYPE);
|
|
IGC_WRITE_REG(hw, IGC_FCAH, FLOW_CONTROL_ADDRESS_HIGH);
|
|
IGC_WRITE_REG(hw, IGC_FCAL, FLOW_CONTROL_ADDRESS_LOW);
|
|
|
|
IGC_WRITE_REG(hw, IGC_FCTTV, hw->fc.pause_time);
|
|
|
|
return igc_set_fc_watermarks_generic(hw);
|
|
}
|
|
|
|
/**
|
|
* igc_config_collision_dist_generic - Configure collision distance
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Configures the collision distance to the default value and is used
|
|
* during link setup.
|
|
**/
|
|
static void igc_config_collision_dist_generic(struct igc_hw *hw)
|
|
{
|
|
u32 tctl;
|
|
|
|
DEBUGFUNC("igc_config_collision_dist_generic");
|
|
|
|
tctl = IGC_READ_REG(hw, IGC_TCTL);
|
|
|
|
tctl &= ~IGC_TCTL_COLD;
|
|
tctl |= IGC_COLLISION_DISTANCE << IGC_COLD_SHIFT;
|
|
|
|
IGC_WRITE_REG(hw, IGC_TCTL, tctl);
|
|
IGC_WRITE_FLUSH(hw);
|
|
}
|
|
|
|
/**
|
|
* igc_set_fc_watermarks_generic - Set flow control high/low watermarks
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Sets the flow control high/low threshold (watermark) registers. If
|
|
* flow control XON frame transmission is enabled, then set XON frame
|
|
* transmission as well.
|
|
**/
|
|
s32 igc_set_fc_watermarks_generic(struct igc_hw *hw)
|
|
{
|
|
u32 fcrtl = 0, fcrth = 0;
|
|
|
|
DEBUGFUNC("igc_set_fc_watermarks_generic");
|
|
|
|
/* Set the flow control receive threshold registers. Normally,
|
|
* these registers will be set to a default threshold that may be
|
|
* adjusted later by the driver's runtime code. However, if the
|
|
* ability to transmit pause frames is not enabled, then these
|
|
* registers will be set to 0.
|
|
*/
|
|
if (hw->fc.current_mode & igc_fc_tx_pause) {
|
|
/* We need to set up the Receive Threshold high and low water
|
|
* marks as well as (optionally) enabling the transmission of
|
|
* XON frames.
|
|
*/
|
|
fcrtl = hw->fc.low_water;
|
|
if (hw->fc.send_xon)
|
|
fcrtl |= IGC_FCRTL_XONE;
|
|
|
|
fcrth = hw->fc.high_water;
|
|
}
|
|
IGC_WRITE_REG(hw, IGC_FCRTL, fcrtl);
|
|
IGC_WRITE_REG(hw, IGC_FCRTH, fcrth);
|
|
|
|
return IGC_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* igc_force_mac_fc_generic - Force the MAC's flow control settings
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Force the MAC's flow control settings. Sets the TFCE and RFCE bits in the
|
|
* device control register to reflect the adapter settings. TFCE and RFCE
|
|
* need to be explicitly set by software when a copper PHY is used because
|
|
* autonegotiation is managed by the PHY rather than the MAC. Software must
|
|
* also configure these bits when link is forced on a fiber connection.
|
|
**/
|
|
s32 igc_force_mac_fc_generic(struct igc_hw *hw)
|
|
{
|
|
u32 ctrl;
|
|
|
|
DEBUGFUNC("igc_force_mac_fc_generic");
|
|
|
|
ctrl = IGC_READ_REG(hw, IGC_CTRL);
|
|
|
|
/* Because we didn't get link via the internal auto-negotiation
|
|
* mechanism (we either forced link or we got link via PHY
|
|
* auto-neg), we have to manually enable/disable transmit an
|
|
* receive flow control.
|
|
*
|
|
* The "Case" statement below enables/disable flow control
|
|
* according to the "hw->fc.current_mode" parameter.
|
|
*
|
|
* The possible values of the "fc" parameter are:
|
|
* 0: Flow control is completely disabled
|
|
* 1: Rx flow control is enabled (we can receive pause
|
|
* frames but not send pause frames).
|
|
* 2: Tx flow control is enabled (we can send pause frames
|
|
* frames but we do not receive pause frames).
|
|
* 3: Both Rx and Tx flow control (symmetric) is enabled.
|
|
* other: No other values should be possible at this point.
|
|
*/
|
|
DEBUGOUT1("hw->fc.current_mode = %u\n", hw->fc.current_mode);
|
|
|
|
switch (hw->fc.current_mode) {
|
|
case igc_fc_none:
|
|
ctrl &= (~(IGC_CTRL_TFCE | IGC_CTRL_RFCE));
|
|
break;
|
|
case igc_fc_rx_pause:
|
|
ctrl &= (~IGC_CTRL_TFCE);
|
|
ctrl |= IGC_CTRL_RFCE;
|
|
break;
|
|
case igc_fc_tx_pause:
|
|
ctrl &= (~IGC_CTRL_RFCE);
|
|
ctrl |= IGC_CTRL_TFCE;
|
|
break;
|
|
case igc_fc_full:
|
|
ctrl |= (IGC_CTRL_TFCE | IGC_CTRL_RFCE);
|
|
break;
|
|
default:
|
|
DEBUGOUT("Flow control param set incorrectly\n");
|
|
return -IGC_ERR_CONFIG;
|
|
}
|
|
|
|
IGC_WRITE_REG(hw, IGC_CTRL, ctrl);
|
|
|
|
return IGC_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* igc_config_fc_after_link_up_generic - Configures flow control after link
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Checks the status of auto-negotiation after link up to ensure that the
|
|
* speed and duplex were not forced. If the link needed to be forced, then
|
|
* flow control needs to be forced also. If auto-negotiation is enabled
|
|
* and did not fail, then we configure flow control based on our link
|
|
* partner.
|
|
**/
|
|
s32 igc_config_fc_after_link_up_generic(struct igc_hw *hw)
|
|
{
|
|
struct igc_mac_info *mac = &hw->mac;
|
|
s32 ret_val = IGC_SUCCESS;
|
|
u16 mii_status_reg, mii_nway_adv_reg, mii_nway_lp_ability_reg;
|
|
u16 speed, duplex;
|
|
|
|
DEBUGFUNC("igc_config_fc_after_link_up_generic");
|
|
|
|
if (ret_val) {
|
|
DEBUGOUT("Error forcing flow control settings\n");
|
|
return ret_val;
|
|
}
|
|
|
|
/* Check for the case where we have copper media and auto-neg is
|
|
* enabled. In this case, we need to check and see if Auto-Neg
|
|
* has completed, and if so, how the PHY and link partner has
|
|
* flow control configured.
|
|
*/
|
|
if (mac->autoneg) {
|
|
/* Read the MII Status Register and check to see if AutoNeg
|
|
* has completed. We read this twice because this reg has
|
|
* some "sticky" (latched) bits.
|
|
*/
|
|
ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &mii_status_reg);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &mii_status_reg);
|
|
if (ret_val)
|
|
return ret_val;
|
|
|
|
if (!(mii_status_reg & MII_SR_AUTONEG_COMPLETE)) {
|
|
DEBUGOUT("Copper PHY and Auto Neg has not completed.\n");
|
|
return ret_val;
|
|
}
|
|
|
|
/* The AutoNeg process has completed, so we now need to
|
|
* read both the Auto Negotiation Advertisement
|
|
* Register (Address 4) and the Auto_Negotiation Base
|
|
* Page Ability Register (Address 5) to determine how
|
|
* flow control was negotiated.
|
|
*/
|
|
ret_val = hw->phy.ops.read_reg(hw, PHY_AUTONEG_ADV,
|
|
&mii_nway_adv_reg);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = hw->phy.ops.read_reg(hw, PHY_LP_ABILITY,
|
|
&mii_nway_lp_ability_reg);
|
|
if (ret_val)
|
|
return ret_val;
|
|
|
|
/* Two bits in the Auto Negotiation Advertisement Register
|
|
* (Address 4) and two bits in the Auto Negotiation Base
|
|
* Page Ability Register (Address 5) determine flow control
|
|
* for both the PHY and the link partner. The following
|
|
* table, taken out of the IEEE 802.3ab/D6.0 dated March 25,
|
|
* 1999, describes these PAUSE resolution bits and how flow
|
|
* control is determined based upon these settings.
|
|
* NOTE: DC = Don't Care
|
|
*
|
|
* LOCAL DEVICE | LINK PARTNER
|
|
* PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution
|
|
*-------|---------|-------|---------|--------------------
|
|
* 0 | 0 | DC | DC | igc_fc_none
|
|
* 0 | 1 | 0 | DC | igc_fc_none
|
|
* 0 | 1 | 1 | 0 | igc_fc_none
|
|
* 0 | 1 | 1 | 1 | igc_fc_tx_pause
|
|
* 1 | 0 | 0 | DC | igc_fc_none
|
|
* 1 | DC | 1 | DC | igc_fc_full
|
|
* 1 | 1 | 0 | 0 | igc_fc_none
|
|
* 1 | 1 | 0 | 1 | igc_fc_rx_pause
|
|
*
|
|
* Are both PAUSE bits set to 1? If so, this implies
|
|
* Symmetric Flow Control is enabled at both ends. The
|
|
* ASM_DIR bits are irrelevant per the spec.
|
|
*
|
|
* For Symmetric Flow Control:
|
|
*
|
|
* LOCAL DEVICE | LINK PARTNER
|
|
* PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
|
|
*-------|---------|-------|---------|--------------------
|
|
* 1 | DC | 1 | DC | IGC_fc_full
|
|
*
|
|
*/
|
|
if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
|
|
(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE)) {
|
|
/* Now we need to check if the user selected Rx ONLY
|
|
* of pause frames. In this case, we had to advertise
|
|
* FULL flow control because we could not advertise Rx
|
|
* ONLY. Hence, we must now check to see if we need to
|
|
* turn OFF the TRANSMISSION of PAUSE frames.
|
|
*/
|
|
if (hw->fc.requested_mode == igc_fc_full) {
|
|
hw->fc.current_mode = igc_fc_full;
|
|
DEBUGOUT("Flow Control = FULL.\n");
|
|
} else {
|
|
hw->fc.current_mode = igc_fc_rx_pause;
|
|
DEBUGOUT("Flow Control = Rx PAUSE frames only.\n");
|
|
}
|
|
}
|
|
/* For receiving PAUSE frames ONLY.
|
|
*
|
|
* LOCAL DEVICE | LINK PARTNER
|
|
* PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
|
|
*-------|---------|-------|---------|--------------------
|
|
* 0 | 1 | 1 | 1 | igc_fc_tx_pause
|
|
*/
|
|
else if (!(mii_nway_adv_reg & NWAY_AR_PAUSE) &&
|
|
(mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
|
|
(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
|
|
(mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
|
|
hw->fc.current_mode = igc_fc_tx_pause;
|
|
DEBUGOUT("Flow Control = Tx PAUSE frames only.\n");
|
|
}
|
|
/* For transmitting PAUSE frames ONLY.
|
|
*
|
|
* LOCAL DEVICE | LINK PARTNER
|
|
* PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
|
|
*-------|---------|-------|---------|--------------------
|
|
* 1 | 1 | 0 | 1 | igc_fc_rx_pause
|
|
*/
|
|
else if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
|
|
(mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
|
|
!(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
|
|
(mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
|
|
hw->fc.current_mode = igc_fc_rx_pause;
|
|
DEBUGOUT("Flow Control = Rx PAUSE frames only.\n");
|
|
} else {
|
|
/* Per the IEEE spec, at this point flow control
|
|
* should be disabled.
|
|
*/
|
|
hw->fc.current_mode = igc_fc_none;
|
|
DEBUGOUT("Flow Control = NONE.\n");
|
|
}
|
|
|
|
/* Now we need to do one last check... If we auto-
|
|
* negotiated to HALF DUPLEX, flow control should not be
|
|
* enabled per IEEE 802.3 spec.
|
|
*/
|
|
ret_val = mac->ops.get_link_up_info(hw, &speed, &duplex);
|
|
if (ret_val) {
|
|
DEBUGOUT("Error getting link speed and duplex\n");
|
|
return ret_val;
|
|
}
|
|
|
|
if (duplex == HALF_DUPLEX)
|
|
hw->fc.current_mode = igc_fc_none;
|
|
|
|
/* Now we call a subroutine to actually force the MAC
|
|
* controller to use the correct flow control settings.
|
|
*/
|
|
ret_val = igc_force_mac_fc_generic(hw);
|
|
if (ret_val) {
|
|
DEBUGOUT("Error forcing flow control settings\n");
|
|
return ret_val;
|
|
}
|
|
}
|
|
|
|
return IGC_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* igc_get_speed_and_duplex_copper_generic - Retrieve current speed/duplex
|
|
* @hw: pointer to the HW structure
|
|
* @speed: stores the current speed
|
|
* @duplex: stores the current duplex
|
|
*
|
|
* Read the status register for the current speed/duplex and store the current
|
|
* speed and duplex for copper connections.
|
|
**/
|
|
s32 igc_get_speed_and_duplex_copper_generic(struct igc_hw *hw, u16 *speed,
|
|
u16 *duplex)
|
|
{
|
|
u32 status;
|
|
|
|
DEBUGFUNC("igc_get_speed_and_duplex_copper_generic");
|
|
|
|
status = IGC_READ_REG(hw, IGC_STATUS);
|
|
if (status & IGC_STATUS_SPEED_1000) {
|
|
/* For I225, STATUS will indicate 1G speed in both 1 Gbps
|
|
* and 2.5 Gbps link modes. An additional bit is used
|
|
* to differentiate between 1 Gbps and 2.5 Gbps.
|
|
*/
|
|
if ((hw->mac.type == igc_i225) &&
|
|
(status & IGC_STATUS_SPEED_2500)) {
|
|
*speed = SPEED_2500;
|
|
DEBUGOUT("2500 Mbs, ");
|
|
} else {
|
|
*speed = SPEED_1000;
|
|
DEBUGOUT("1000 Mbs, ");
|
|
}
|
|
} else if (status & IGC_STATUS_SPEED_100) {
|
|
*speed = SPEED_100;
|
|
DEBUGOUT("100 Mbs, ");
|
|
} else {
|
|
*speed = SPEED_10;
|
|
DEBUGOUT("10 Mbs, ");
|
|
}
|
|
|
|
if (status & IGC_STATUS_FD) {
|
|
*duplex = FULL_DUPLEX;
|
|
DEBUGOUT("Full Duplex\n");
|
|
} else {
|
|
*duplex = HALF_DUPLEX;
|
|
DEBUGOUT("Half Duplex\n");
|
|
}
|
|
|
|
return IGC_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* igc_get_hw_semaphore_generic - Acquire hardware semaphore
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Acquire the HW semaphore to access the PHY or NVM
|
|
**/
|
|
s32 igc_get_hw_semaphore_generic(struct igc_hw *hw)
|
|
{
|
|
u32 swsm;
|
|
s32 timeout = hw->nvm.word_size + 1;
|
|
s32 i = 0;
|
|
|
|
DEBUGFUNC("igc_get_hw_semaphore_generic");
|
|
|
|
/* Get the SW semaphore */
|
|
while (i < timeout) {
|
|
swsm = IGC_READ_REG(hw, IGC_SWSM);
|
|
if (!(swsm & IGC_SWSM_SMBI))
|
|
break;
|
|
|
|
usec_delay(50);
|
|
i++;
|
|
}
|
|
|
|
if (i == timeout) {
|
|
DEBUGOUT("Driver can't access device - SMBI bit is set.\n");
|
|
return -IGC_ERR_NVM;
|
|
}
|
|
|
|
/* Get the FW semaphore. */
|
|
for (i = 0; i < timeout; i++) {
|
|
swsm = IGC_READ_REG(hw, IGC_SWSM);
|
|
IGC_WRITE_REG(hw, IGC_SWSM, swsm | IGC_SWSM_SWESMBI);
|
|
|
|
/* Semaphore acquired if bit latched */
|
|
if (IGC_READ_REG(hw, IGC_SWSM) & IGC_SWSM_SWESMBI)
|
|
break;
|
|
|
|
usec_delay(50);
|
|
}
|
|
|
|
if (i == timeout) {
|
|
/* Release semaphores */
|
|
igc_put_hw_semaphore_generic(hw);
|
|
DEBUGOUT("Driver can't access the NVM\n");
|
|
return -IGC_ERR_NVM;
|
|
}
|
|
|
|
return IGC_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* igc_put_hw_semaphore_generic - Release hardware semaphore
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Release hardware semaphore used to access the PHY or NVM
|
|
**/
|
|
void igc_put_hw_semaphore_generic(struct igc_hw *hw)
|
|
{
|
|
u32 swsm;
|
|
|
|
DEBUGFUNC("igc_put_hw_semaphore_generic");
|
|
|
|
swsm = IGC_READ_REG(hw, IGC_SWSM);
|
|
|
|
swsm &= ~(IGC_SWSM_SMBI | IGC_SWSM_SWESMBI);
|
|
|
|
IGC_WRITE_REG(hw, IGC_SWSM, swsm);
|
|
}
|
|
|
|
/**
|
|
* igc_get_auto_rd_done_generic - Check for auto read completion
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Check EEPROM for Auto Read done bit.
|
|
**/
|
|
s32 igc_get_auto_rd_done_generic(struct igc_hw *hw)
|
|
{
|
|
s32 i = 0;
|
|
|
|
DEBUGFUNC("igc_get_auto_rd_done_generic");
|
|
|
|
while (i < AUTO_READ_DONE_TIMEOUT) {
|
|
if (IGC_READ_REG(hw, IGC_EECD) & IGC_EECD_AUTO_RD)
|
|
break;
|
|
msec_delay(1);
|
|
i++;
|
|
}
|
|
|
|
if (i == AUTO_READ_DONE_TIMEOUT) {
|
|
DEBUGOUT("Auto read by HW from NVM has not completed.\n");
|
|
return -IGC_ERR_RESET;
|
|
}
|
|
|
|
return IGC_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* igc_disable_pcie_master_generic - Disables PCI-express master access
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Returns IGC_SUCCESS if successful, else returns -10
|
|
* (-IGC_ERR_MASTER_REQUESTS_PENDING) if master disable bit has not caused
|
|
* the master requests to be disabled.
|
|
*
|
|
* Disables PCI-Express master access and verifies there are no pending
|
|
* requests.
|
|
**/
|
|
s32 igc_disable_pcie_master_generic(struct igc_hw *hw)
|
|
{
|
|
u32 ctrl;
|
|
s32 timeout = MASTER_DISABLE_TIMEOUT;
|
|
|
|
DEBUGFUNC("igc_disable_pcie_master_generic");
|
|
|
|
ctrl = IGC_READ_REG(hw, IGC_CTRL);
|
|
ctrl |= IGC_CTRL_GIO_MASTER_DISABLE;
|
|
IGC_WRITE_REG(hw, IGC_CTRL, ctrl);
|
|
|
|
while (timeout) {
|
|
if (!(IGC_READ_REG(hw, IGC_STATUS) &
|
|
IGC_STATUS_GIO_MASTER_ENABLE))
|
|
break;
|
|
usec_delay(100);
|
|
timeout--;
|
|
}
|
|
|
|
if (!timeout) {
|
|
DEBUGOUT("Master requests are pending.\n");
|
|
return -IGC_ERR_MASTER_REQUESTS_PENDING;
|
|
}
|
|
|
|
return IGC_SUCCESS;
|
|
}
|