/******************************************************************************
SPDX-License-Identifier: BSD-3-Clause
Copyright (c) 2001-2015, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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******************************************************************************/
/*$FreeBSD$*/
#include "e1000_api.h"
/**
* e1000_calculate_checksum - Calculate checksum for buffer
* @buffer: pointer to EEPROM
* @length: size of EEPROM to calculate a checksum for
*
* Calculates the checksum for some buffer on a specified length. The
* checksum calculated is returned.
**/
u8 e1000_calculate_checksum(u8 *buffer, u32 length)
{
u32 i;
u8 sum = 0;
DEBUGFUNC("e1000_calculate_checksum");
if (!buffer)
return 0;
for (i = 0; i < length; i++)
sum += buffer[i];
return (u8) (0 - sum);
}
/**
* e1000_mng_enable_host_if_generic - Checks host interface is enabled
* @hw: pointer to the HW structure
*
* Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND
*
* This function checks whether the HOST IF is enabled for command operation
* and also checks whether the previous command is completed. It busy waits
* in case of previous command is not completed.
**/
s32 e1000_mng_enable_host_if_generic(struct e1000_hw *hw)
{
u32 hicr;
u8 i;
DEBUGFUNC("e1000_mng_enable_host_if_generic");
if (!hw->mac.arc_subsystem_valid) {
DEBUGOUT("ARC subsystem not valid.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
/* Check that the host interface is enabled. */
hicr = E1000_READ_REG(hw, E1000_HICR);
if (!(hicr & E1000_HICR_EN)) {
DEBUGOUT("E1000_HOST_EN bit disabled.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
/* check the previous command is completed */
for (i = 0; i < E1000_MNG_DHCP_COMMAND_TIMEOUT; i++) {
hicr = E1000_READ_REG(hw, E1000_HICR);
if (!(hicr & E1000_HICR_C))
break;
msec_delay_irq(1);
}
if (i == E1000_MNG_DHCP_COMMAND_TIMEOUT) {
DEBUGOUT("Previous command timeout failed .\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
return E1000_SUCCESS;
}
/**
* e1000_check_mng_mode_generic - Generic check management mode
* @hw: pointer to the HW structure
*
* Reads the firmware semaphore register and returns TRUE (>0) if
* manageability is enabled, else FALSE (0).
**/
bool e1000_check_mng_mode_generic(struct e1000_hw *hw)
{
u32 fwsm = E1000_READ_REG(hw, E1000_FWSM);
DEBUGFUNC("e1000_check_mng_mode_generic");
return (fwsm & E1000_FWSM_MODE_MASK) ==
(E1000_MNG_IAMT_MODE << E1000_FWSM_MODE_SHIFT);
}
/**
* e1000_enable_tx_pkt_filtering_generic - Enable packet filtering on Tx
* @hw: pointer to the HW structure
*
* Enables packet filtering on transmit packets if manageability is enabled
* and host interface is enabled.
**/
bool e1000_enable_tx_pkt_filtering_generic(struct e1000_hw *hw)
{
struct e1000_host_mng_dhcp_cookie *hdr = &hw->mng_cookie;
u32 *buffer = (u32 *)&hw->mng_cookie;
u32 offset;
s32 ret_val, hdr_csum, csum;
u8 i, len;
DEBUGFUNC("e1000_enable_tx_pkt_filtering_generic");
hw->mac.tx_pkt_filtering = TRUE;
/* No manageability, no filtering */
if (!hw->mac.ops.check_mng_mode(hw)) {
hw->mac.tx_pkt_filtering = FALSE;
return hw->mac.tx_pkt_filtering;
}
/* If we can't read from the host interface for whatever
* reason, disable filtering.
*/
ret_val = e1000_mng_enable_host_if_generic(hw);
if (ret_val != E1000_SUCCESS) {
hw->mac.tx_pkt_filtering = FALSE;
return hw->mac.tx_pkt_filtering;
}
/* Read in the header. Length and offset are in dwords. */
len = E1000_MNG_DHCP_COOKIE_LENGTH >> 2;
offset = E1000_MNG_DHCP_COOKIE_OFFSET >> 2;
for (i = 0; i < len; i++)
*(buffer + i) = E1000_READ_REG_ARRAY_DWORD(hw, E1000_HOST_IF,
offset + i);
hdr_csum = hdr->checksum;
hdr->checksum = 0;
csum = e1000_calculate_checksum((u8 *)hdr,
E1000_MNG_DHCP_COOKIE_LENGTH);
/* If either the checksums or signature don't match, then
* the cookie area isn't considered valid, in which case we
* take the safe route of assuming Tx filtering is enabled.
*/
if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) {
hw->mac.tx_pkt_filtering = TRUE;
return hw->mac.tx_pkt_filtering;
}
/* Cookie area is valid, make the final check for filtering. */
if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING))
hw->mac.tx_pkt_filtering = FALSE;
return hw->mac.tx_pkt_filtering;
}
/**
* e1000_mng_write_cmd_header_generic - Writes manageability command header
* @hw: pointer to the HW structure
* @hdr: pointer to the host interface command header
*
* Writes the command header after does the checksum calculation.
**/
s32 e1000_mng_write_cmd_header_generic(struct e1000_hw *hw,
struct e1000_host_mng_command_header *hdr)
{
u16 i, length = sizeof(struct e1000_host_mng_command_header);
DEBUGFUNC("e1000_mng_write_cmd_header_generic");
/* Write the whole command header structure with new checksum. */
hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length);
length >>= 2;
/* Write the relevant command block into the ram area. */
for (i = 0; i < length; i++) {
E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, i,
*((u32 *) hdr + i));
E1000_WRITE_FLUSH(hw);
}
return E1000_SUCCESS;
}
/**
* e1000_mng_host_if_write_generic - Write to the manageability host interface
* @hw: pointer to the HW structure
* @buffer: pointer to the host interface buffer
* @length: size of the buffer
* @offset: location in the buffer to write to
* @sum: sum of the data (not checksum)
*
* This function writes the buffer content at the offset given on the host if.
* It also does alignment considerations to do the writes in most efficient
* way. Also fills up the sum of the buffer in *buffer parameter.
**/
s32 e1000_mng_host_if_write_generic(struct e1000_hw *hw, u8 *buffer,
u16 length, u16 offset, u8 *sum)
{
u8 *tmp;
u8 *bufptr = buffer;
u32 data = 0;
u16 remaining, i, j, prev_bytes;
DEBUGFUNC("e1000_mng_host_if_write_generic");
/* sum = only sum of the data and it is not checksum */
if (length == 0 || offset + length > E1000_HI_MAX_MNG_DATA_LENGTH)
return -E1000_ERR_PARAM;
tmp = (u8 *)&data;
prev_bytes = offset & 0x3;
offset >>= 2;
if (prev_bytes) {
data = E1000_READ_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset);
for (j = prev_bytes; j < sizeof(u32); j++) {
*(tmp + j) = *bufptr++;
*sum += *(tmp + j);
}
E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset, data);
length -= j - prev_bytes;
offset++;
}
remaining = length & 0x3;
length -= remaining;
/* Calculate length in DWORDs */
length >>= 2;
/* The device driver writes the relevant command block into the
* ram area.
*/
for (i = 0; i < length; i++) {
for (j = 0; j < sizeof(u32); j++) {
*(tmp + j) = *bufptr++;
*sum += *(tmp + j);
}
E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset + i,
data);
}
if (remaining) {
for (j = 0; j < sizeof(u32); j++) {
if (j < remaining)
*(tmp + j) = *bufptr++;
else
*(tmp + j) = 0;
*sum += *(tmp + j);
}
E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, offset + i,
data);
}
return E1000_SUCCESS;
}
/**
* e1000_mng_write_dhcp_info_generic - Writes DHCP info to host interface
* @hw: pointer to the HW structure
* @buffer: pointer to the host interface
* @length: size of the buffer
*
* Writes the DHCP information to the host interface.
**/
s32 e1000_mng_write_dhcp_info_generic(struct e1000_hw *hw, u8 *buffer,
u16 length)
{
struct e1000_host_mng_command_header hdr;
s32 ret_val;
u32 hicr;
DEBUGFUNC("e1000_mng_write_dhcp_info_generic");
hdr.command_id = E1000_MNG_DHCP_TX_PAYLOAD_CMD;
hdr.command_length = length;
hdr.reserved1 = 0;
hdr.reserved2 = 0;
hdr.checksum = 0;
/* Enable the host interface */
ret_val = e1000_mng_enable_host_if_generic(hw);
if (ret_val)
return ret_val;
/* Populate the host interface with the contents of "buffer". */
ret_val = e1000_mng_host_if_write_generic(hw, buffer, length,
sizeof(hdr), &(hdr.checksum));
if (ret_val)
return ret_val;
/* Write the manageability command header */
ret_val = e1000_mng_write_cmd_header_generic(hw, &hdr);
if (ret_val)
return ret_val;
/* Tell the ARC a new command is pending. */
hicr = E1000_READ_REG(hw, E1000_HICR);
E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C);
return E1000_SUCCESS;
}
/**
* e1000_enable_mng_pass_thru - Check if management passthrough is needed
* @hw: pointer to the HW structure
*
* Verifies the hardware needs to leave interface enabled so that frames can
* be directed to and from the management interface.
**/
bool e1000_enable_mng_pass_thru(struct e1000_hw *hw)
{
u32 manc;
u32 fwsm, factps;
DEBUGFUNC("e1000_enable_mng_pass_thru");
if (!hw->mac.asf_firmware_present)
return FALSE;
manc = E1000_READ_REG(hw, E1000_MANC);
if (!(manc & E1000_MANC_RCV_TCO_EN))
return FALSE;
if (hw->mac.has_fwsm) {
fwsm = E1000_READ_REG(hw, E1000_FWSM);
factps = E1000_READ_REG(hw, E1000_FACTPS);
if (!(factps & E1000_FACTPS_MNGCG) &&
((fwsm & E1000_FWSM_MODE_MASK) ==
(e1000_mng_mode_pt << E1000_FWSM_MODE_SHIFT)))
return TRUE;
} else if ((hw->mac.type == e1000_82574) ||
(hw->mac.type == e1000_82583)) {
u16 data;
s32 ret_val;
factps = E1000_READ_REG(hw, E1000_FACTPS);
ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data);
if (ret_val)
return FALSE;
if (!(factps & E1000_FACTPS_MNGCG) &&
((data & E1000_NVM_INIT_CTRL2_MNGM) ==
(e1000_mng_mode_pt << 13)))
return TRUE;
} else if ((manc & E1000_MANC_SMBUS_EN) &&
!(manc & E1000_MANC_ASF_EN)) {
return TRUE;
}
return FALSE;
}
/**
* e1000_host_interface_command - Writes buffer to host interface
* @hw: pointer to the HW structure
* @buffer: contains a command to write
* @length: the byte length of the buffer, must be multiple of 4 bytes
*
* Writes a buffer to the Host Interface. Upon success, returns E1000_SUCCESS
* else returns E1000_ERR_HOST_INTERFACE_COMMAND.
**/
s32 e1000_host_interface_command(struct e1000_hw *hw, u8 *buffer, u32 length)
{
u32 hicr, i;
DEBUGFUNC("e1000_host_interface_command");
if (!(hw->mac.arc_subsystem_valid)) {
DEBUGOUT("Hardware doesn't support host interface command.\n");
return E1000_SUCCESS;
}
if (!hw->mac.asf_firmware_present) {
DEBUGOUT("Firmware is not present.\n");
return E1000_SUCCESS;
}
if (length == 0 || length & 0x3 ||
length > E1000_HI_MAX_BLOCK_BYTE_LENGTH) {
DEBUGOUT("Buffer length failure.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
/* Check that the host interface is enabled. */
hicr = E1000_READ_REG(hw, E1000_HICR);
if (!(hicr & E1000_HICR_EN)) {
DEBUGOUT("E1000_HOST_EN bit disabled.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
/* Calculate length in DWORDs */
length >>= 2;
/* The device driver writes the relevant command block
* into the ram area.
*/
for (i = 0; i < length; i++)
E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF, i,
*((u32 *)buffer + i));
/* Setting this bit tells the ARC that a new command is pending. */
E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C);
for (i = 0; i < E1000_HI_COMMAND_TIMEOUT; i++) {
hicr = E1000_READ_REG(hw, E1000_HICR);
if (!(hicr & E1000_HICR_C))
break;
msec_delay(1);
}
/* Check command successful completion. */
if (i == E1000_HI_COMMAND_TIMEOUT ||
(!(E1000_READ_REG(hw, E1000_HICR) & E1000_HICR_SV))) {
DEBUGOUT("Command has failed with no status valid.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
for (i = 0; i < length; i++)
*((u32 *)buffer + i) = E1000_READ_REG_ARRAY_DWORD(hw,
E1000_HOST_IF,
i);
return E1000_SUCCESS;
}
/**
* e1000_load_firmware - Writes proxy FW code buffer to host interface
* and execute.
* @hw: pointer to the HW structure
* @buffer: contains a firmware to write
* @length: the byte length of the buffer, must be multiple of 4 bytes
*
* Upon success returns E1000_SUCCESS, returns E1000_ERR_CONFIG if not enabled
* in HW else returns E1000_ERR_HOST_INTERFACE_COMMAND.
**/
s32 e1000_load_firmware(struct e1000_hw *hw, u8 *buffer, u32 length)
{
u32 hicr, hibba, fwsm, icr, i;
DEBUGFUNC("e1000_load_firmware");
if (hw->mac.type < e1000_i210) {
DEBUGOUT("Hardware doesn't support loading FW by the driver\n");
return -E1000_ERR_CONFIG;
}
/* Check that the host interface is enabled. */
hicr = E1000_READ_REG(hw, E1000_HICR);
if (!(hicr & E1000_HICR_EN)) {
DEBUGOUT("E1000_HOST_EN bit disabled.\n");
return -E1000_ERR_CONFIG;
}
if (!(hicr & E1000_HICR_MEMORY_BASE_EN)) {
DEBUGOUT("E1000_HICR_MEMORY_BASE_EN bit disabled.\n");
return -E1000_ERR_CONFIG;
}
if (length == 0 || length & 0x3 || length > E1000_HI_FW_MAX_LENGTH) {
DEBUGOUT("Buffer length failure.\n");
return -E1000_ERR_INVALID_ARGUMENT;
}
/* Clear notification from ROM-FW by reading ICR register */
icr = E1000_READ_REG(hw, E1000_ICR_V2);
/* Reset ROM-FW */
hicr = E1000_READ_REG(hw, E1000_HICR);
hicr |= E1000_HICR_FW_RESET_ENABLE;
E1000_WRITE_REG(hw, E1000_HICR, hicr);
hicr |= E1000_HICR_FW_RESET;
E1000_WRITE_REG(hw, E1000_HICR, hicr);
E1000_WRITE_FLUSH(hw);
/* Wait till MAC notifies about its readiness after ROM-FW reset */
for (i = 0; i < (E1000_HI_COMMAND_TIMEOUT * 2); i++) {
icr = E1000_READ_REG(hw, E1000_ICR_V2);
if (icr & E1000_ICR_MNG)
break;
msec_delay(1);
}
/* Check for timeout */
if (i == E1000_HI_COMMAND_TIMEOUT) {
DEBUGOUT("FW reset failed.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
/* Wait till MAC is ready to accept new FW code */
for (i = 0; i < E1000_HI_COMMAND_TIMEOUT; i++) {
fwsm = E1000_READ_REG(hw, E1000_FWSM);
if ((fwsm & E1000_FWSM_FW_VALID) &&
((fwsm & E1000_FWSM_MODE_MASK) >> E1000_FWSM_MODE_SHIFT ==
E1000_FWSM_HI_EN_ONLY_MODE))
break;
msec_delay(1);
}
/* Check for timeout */
if (i == E1000_HI_COMMAND_TIMEOUT) {
DEBUGOUT("FW reset failed.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
/* Calculate length in DWORDs */
length >>= 2;
/* The device driver writes the relevant FW code block
* into the ram area in DWORDs via 1kB ram addressing window.
*/
for (i = 0; i < length; i++) {
if (!(i % E1000_HI_FW_BLOCK_DWORD_LENGTH)) {
/* Point to correct 1kB ram window */
hibba = E1000_HI_FW_BASE_ADDRESS +
((E1000_HI_FW_BLOCK_DWORD_LENGTH << 2) *
(i / E1000_HI_FW_BLOCK_DWORD_LENGTH));
E1000_WRITE_REG(hw, E1000_HIBBA, hibba);
}
E1000_WRITE_REG_ARRAY_DWORD(hw, E1000_HOST_IF,
i % E1000_HI_FW_BLOCK_DWORD_LENGTH,
*((u32 *)buffer + i));
}
/* Setting this bit tells the ARC that a new FW is ready to execute. */
hicr = E1000_READ_REG(hw, E1000_HICR);
E1000_WRITE_REG(hw, E1000_HICR, hicr | E1000_HICR_C);
for (i = 0; i < E1000_HI_COMMAND_TIMEOUT; i++) {
hicr = E1000_READ_REG(hw, E1000_HICR);
if (!(hicr & E1000_HICR_C))
break;
msec_delay(1);
}
/* Check for successful FW start. */
if (i == E1000_HI_COMMAND_TIMEOUT) {
DEBUGOUT("New FW did not start within timeout period.\n");
return -E1000_ERR_HOST_INTERFACE_COMMAND;
}
return E1000_SUCCESS;
}