devices/e1000e/manage-3.8-orig.c
author Knud Baastrup <kba@deif.com>
Tue, 14 Apr 2015 10:12:55 -0400
changeset 2625 e25af8bd3957
parent 2589 2b9c78543663
permissions -rw-r--r--
Eoe mac address now derived from unique mac.
The EoE MAC address is now derived from the NIC part of the first global
unique MAC address of the linked list of available network interfaces or
otherwise the MAC address used by the EtherCAT master. The EoE MAC address
will get the format 02:NIC:NIC:NIC:RP:RP where NIC comes from the unique MAC
address (if available) and RP is the ring position of the EoE slave.
2589
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/*******************************************************************************
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  Intel PRO/1000 Linux driver
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  Copyright(c) 1999 - 2012 Intel Corporation.
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  This program is free software; you can redistribute it and/or modify it
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  under the terms and conditions of the GNU General Public License,
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  version 2, as published by the Free Software Foundation.
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  This program is distributed in the hope it will be useful, but WITHOUT
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  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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  more details.
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  You should have received a copy of the GNU General Public License along with
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  this program; if not, write to the Free Software Foundation, Inc.,
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  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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  The full GNU General Public License is included in this distribution in
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  the file called "COPYING".
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  Contact Information:
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  Linux NICS <linux.nics@intel.com>
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  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#include "e1000.h"
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enum e1000_mng_mode {
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	e1000_mng_mode_none = 0,
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	e1000_mng_mode_asf,
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	e1000_mng_mode_pt,
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	e1000_mng_mode_ipmi,
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	e1000_mng_mode_host_if_only
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};
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#define E1000_FACTPS_MNGCG		0x20000000
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/* Intel(R) Active Management Technology signature */
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#define E1000_IAMT_SIGNATURE		0x544D4149
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/**
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 *  e1000_calculate_checksum - Calculate checksum for buffer
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 *  @buffer: pointer to EEPROM
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 *  @length: size of EEPROM to calculate a checksum for
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 *
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 *  Calculates the checksum for some buffer on a specified length.  The
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 *  checksum calculated is returned.
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 **/
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static u8 e1000_calculate_checksum(u8 *buffer, u32 length)
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{
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	u32 i;
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	u8 sum = 0;
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	if (!buffer)
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		return 0;
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	for (i = 0; i < length; i++)
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		sum += buffer[i];
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	return (u8)(0 - sum);
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}
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/**
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 *  e1000_mng_enable_host_if - Checks host interface is enabled
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 *  @hw: pointer to the HW structure
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 *
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 *  Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND
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 *
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 *  This function checks whether the HOST IF is enabled for command operation
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 *  and also checks whether the previous command is completed.  It busy waits
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 *  in case of previous command is not completed.
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 **/
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static s32 e1000_mng_enable_host_if(struct e1000_hw *hw)
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{
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	u32 hicr;
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	u8 i;
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	if (!hw->mac.arc_subsystem_valid) {
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		e_dbg("ARC subsystem not valid.\n");
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		return -E1000_ERR_HOST_INTERFACE_COMMAND;
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	}
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	/* Check that the host interface is enabled. */
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	hicr = er32(HICR);
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	if (!(hicr & E1000_HICR_EN)) {
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		e_dbg("E1000_HOST_EN bit disabled.\n");
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		return -E1000_ERR_HOST_INTERFACE_COMMAND;
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	}
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	/* check the previous command is completed */
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	for (i = 0; i < E1000_MNG_DHCP_COMMAND_TIMEOUT; i++) {
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		hicr = er32(HICR);
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		if (!(hicr & E1000_HICR_C))
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			break;
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		mdelay(1);
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	}
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	if (i == E1000_MNG_DHCP_COMMAND_TIMEOUT) {
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		e_dbg("Previous command timeout failed .\n");
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		return -E1000_ERR_HOST_INTERFACE_COMMAND;
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	}
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	return 0;
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}
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/**
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 *  e1000e_check_mng_mode_generic - Generic check management mode
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 *  @hw: pointer to the HW structure
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 *
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 *  Reads the firmware semaphore register and returns true (>0) if
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 *  manageability is enabled, else false (0).
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 **/
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bool e1000e_check_mng_mode_generic(struct e1000_hw *hw)
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{
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	u32 fwsm = er32(FWSM);
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	return (fwsm & E1000_FWSM_MODE_MASK) ==
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	    (E1000_MNG_IAMT_MODE << E1000_FWSM_MODE_SHIFT);
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}
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/**
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 *  e1000e_enable_tx_pkt_filtering - Enable packet filtering on Tx
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 *  @hw: pointer to the HW structure
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 *
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 *  Enables packet filtering on transmit packets if manageability is enabled
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 *  and host interface is enabled.
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 **/
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bool e1000e_enable_tx_pkt_filtering(struct e1000_hw *hw)
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{
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	struct e1000_host_mng_dhcp_cookie *hdr = &hw->mng_cookie;
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   133
	u32 *buffer = (u32 *)&hw->mng_cookie;
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   134
	u32 offset;
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   135
	s32 ret_val, hdr_csum, csum;
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   136
	u8 i, len;
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   137
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   138
	hw->mac.tx_pkt_filtering = true;
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   139
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   140
	/* No manageability, no filtering */
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   141
	if (!hw->mac.ops.check_mng_mode(hw)) {
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   142
		hw->mac.tx_pkt_filtering = false;
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   143
		return hw->mac.tx_pkt_filtering;
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   144
	}
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   145
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   146
	/* If we can't read from the host interface for whatever
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   147
	 * reason, disable filtering.
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   148
	 */
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   149
	ret_val = e1000_mng_enable_host_if(hw);
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   150
	if (ret_val) {
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   151
		hw->mac.tx_pkt_filtering = false;
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   152
		return hw->mac.tx_pkt_filtering;
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   153
	}
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diff changeset
   154
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   155
	/* Read in the header.  Length and offset are in dwords. */
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   156
	len = E1000_MNG_DHCP_COOKIE_LENGTH >> 2;
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   157
	offset = E1000_MNG_DHCP_COOKIE_OFFSET >> 2;
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   158
	for (i = 0; i < len; i++)
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   159
		*(buffer + i) = E1000_READ_REG_ARRAY(hw, E1000_HOST_IF,
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   160
						     offset + i);
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   161
	hdr_csum = hdr->checksum;
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   162
	hdr->checksum = 0;
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   163
	csum = e1000_calculate_checksum((u8 *)hdr,
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   164
					E1000_MNG_DHCP_COOKIE_LENGTH);
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   165
	/* If either the checksums or signature don't match, then
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   166
	 * the cookie area isn't considered valid, in which case we
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   167
	 * take the safe route of assuming Tx filtering is enabled.
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   168
	 */
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   169
	if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) {
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   170
		hw->mac.tx_pkt_filtering = true;
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   171
		return hw->mac.tx_pkt_filtering;
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diff changeset
   172
	}
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diff changeset
   173
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   174
	/* Cookie area is valid, make the final check for filtering. */
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   175
	if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING))
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   176
		hw->mac.tx_pkt_filtering = false;
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   177
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   178
	return hw->mac.tx_pkt_filtering;
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   179
}
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   180
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   181
/**
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   182
 *  e1000_mng_write_cmd_header - Writes manageability command header
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parents:
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   183
 *  @hw: pointer to the HW structure
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   184
 *  @hdr: pointer to the host interface command header
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   185
 *
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   186
 *  Writes the command header after does the checksum calculation.
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   187
 **/
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   188
static s32 e1000_mng_write_cmd_header(struct e1000_hw *hw,
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diff changeset
   189
				      struct e1000_host_mng_command_header *hdr)
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diff changeset
   190
{
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diff changeset
   191
	u16 i, length = sizeof(struct e1000_host_mng_command_header);
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parents:
diff changeset
   192
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diff changeset
   193
	/* Write the whole command header structure with new checksum. */
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parents:
diff changeset
   194
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diff changeset
   195
	hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length);
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parents:
diff changeset
   196
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parents:
diff changeset
   197
	length >>= 2;
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diff changeset
   198
	/* Write the relevant command block into the ram area. */
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diff changeset
   199
	for (i = 0; i < length; i++) {
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diff changeset
   200
		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, i, *((u32 *)hdr + i));
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diff changeset
   201
		e1e_flush();
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parents:
diff changeset
   202
	}
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parents:
diff changeset
   203
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   204
	return 0;
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diff changeset
   205
}
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parents:
diff changeset
   206
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parents:
diff changeset
   207
/**
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diff changeset
   208
 *  e1000_mng_host_if_write - Write to the manageability host interface
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parents:
diff changeset
   209
 *  @hw: pointer to the HW structure
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diff changeset
   210
 *  @buffer: pointer to the host interface buffer
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parents:
diff changeset
   211
 *  @length: size of the buffer
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parents:
diff changeset
   212
 *  @offset: location in the buffer to write to
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parents:
diff changeset
   213
 *  @sum: sum of the data (not checksum)
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parents:
diff changeset
   214
 *
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diff changeset
   215
 *  This function writes the buffer content at the offset given on the host if.
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parents:
diff changeset
   216
 *  It also does alignment considerations to do the writes in most efficient
2b9c78543663 Reverted default branch to stable-1.5.
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parents:
diff changeset
   217
 *  way.  Also fills up the sum of the buffer in *buffer parameter.
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parents:
diff changeset
   218
 **/
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parents:
diff changeset
   219
static s32 e1000_mng_host_if_write(struct e1000_hw *hw, u8 *buffer,
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diff changeset
   220
				   u16 length, u16 offset, u8 *sum)
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diff changeset
   221
{
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diff changeset
   222
	u8 *tmp;
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diff changeset
   223
	u8 *bufptr = buffer;
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diff changeset
   224
	u32 data = 0;
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parents:
diff changeset
   225
	u16 remaining, i, j, prev_bytes;
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diff changeset
   226
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parents:
diff changeset
   227
	/* sum = only sum of the data and it is not checksum */
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diff changeset
   228
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diff changeset
   229
	if (length == 0 || offset + length > E1000_HI_MAX_MNG_DATA_LENGTH)
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diff changeset
   230
		return -E1000_ERR_PARAM;
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diff changeset
   231
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diff changeset
   232
	tmp = (u8 *)&data;
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parents:
diff changeset
   233
	prev_bytes = offset & 0x3;
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parents:
diff changeset
   234
	offset >>= 2;
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parents:
diff changeset
   235
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parents:
diff changeset
   236
	if (prev_bytes) {
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diff changeset
   237
		data = E1000_READ_REG_ARRAY(hw, E1000_HOST_IF, offset);
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diff changeset
   238
		for (j = prev_bytes; j < sizeof(u32); j++) {
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diff changeset
   239
			*(tmp + j) = *bufptr++;
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diff changeset
   240
			*sum += *(tmp + j);
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parents:
diff changeset
   241
		}
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parents:
diff changeset
   242
		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset, data);
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parents:
diff changeset
   243
		length -= j - prev_bytes;
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parents:
diff changeset
   244
		offset++;
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parents:
diff changeset
   245
	}
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parents:
diff changeset
   246
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parents:
diff changeset
   247
	remaining = length & 0x3;
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parents:
diff changeset
   248
	length -= remaining;
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parents:
diff changeset
   249
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diff changeset
   250
	/* Calculate length in DWORDs */
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parents:
diff changeset
   251
	length >>= 2;
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parents:
diff changeset
   252
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diff changeset
   253
	/* The device driver writes the relevant command block into the
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parents:
diff changeset
   254
	 * ram area.
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parents:
diff changeset
   255
	 */
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parents:
diff changeset
   256
	for (i = 0; i < length; i++) {
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parents:
diff changeset
   257
		for (j = 0; j < sizeof(u32); j++) {
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parents:
diff changeset
   258
			*(tmp + j) = *bufptr++;
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diff changeset
   259
			*sum += *(tmp + j);
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parents:
diff changeset
   260
		}
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parents:
diff changeset
   261
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diff changeset
   262
		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset + i, data);
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parents:
diff changeset
   263
	}
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parents:
diff changeset
   264
	if (remaining) {
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   265
		for (j = 0; j < sizeof(u32); j++) {
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   266
			if (j < remaining)
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				*(tmp + j) = *bufptr++;
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   268
			else
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   269
				*(tmp + j) = 0;
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   270
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   271
			*sum += *(tmp + j);
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   272
		}
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		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset + i, data);
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   274
	}
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   275
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   276
	return 0;
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   277
}
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diff changeset
   278
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   279
/**
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   280
 *  e1000e_mng_write_dhcp_info - Writes DHCP info to host interface
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   281
 *  @hw: pointer to the HW structure
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   282
 *  @buffer: pointer to the host interface
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   283
 *  @length: size of the buffer
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   284
 *
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   285
 *  Writes the DHCP information to the host interface.
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   286
 **/
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   287
s32 e1000e_mng_write_dhcp_info(struct e1000_hw *hw, u8 *buffer, u16 length)
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   288
{
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   289
	struct e1000_host_mng_command_header hdr;
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   290
	s32 ret_val;
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   291
	u32 hicr;
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   292
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   293
	hdr.command_id = E1000_MNG_DHCP_TX_PAYLOAD_CMD;
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   294
	hdr.command_length = length;
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   295
	hdr.reserved1 = 0;
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   296
	hdr.reserved2 = 0;
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   297
	hdr.checksum = 0;
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   298
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   299
	/* Enable the host interface */
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	ret_val = e1000_mng_enable_host_if(hw);
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   301
	if (ret_val)
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   302
		return ret_val;
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   303
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   304
	/* Populate the host interface with the contents of "buffer". */
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   305
	ret_val = e1000_mng_host_if_write(hw, buffer, length,
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   306
					  sizeof(hdr), &(hdr.checksum));
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   307
	if (ret_val)
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   308
		return ret_val;
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parents:
diff changeset
   309
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   310
	/* Write the manageability command header */
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diff changeset
   311
	ret_val = e1000_mng_write_cmd_header(hw, &hdr);
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diff changeset
   312
	if (ret_val)
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   313
		return ret_val;
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diff changeset
   314
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diff changeset
   315
	/* Tell the ARC a new command is pending. */
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diff changeset
   316
	hicr = er32(HICR);
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   317
	ew32(HICR, hicr | E1000_HICR_C);
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parents:
diff changeset
   318
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   319
	return 0;
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diff changeset
   320
}
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parents:
diff changeset
   321
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diff changeset
   322
/**
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diff changeset
   323
 *  e1000e_enable_mng_pass_thru - Check if management passthrough is needed
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parents:
diff changeset
   324
 *  @hw: pointer to the HW structure
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parents:
diff changeset
   325
 *
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diff changeset
   326
 *  Verifies the hardware needs to leave interface enabled so that frames can
2b9c78543663 Reverted default branch to stable-1.5.
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parents:
diff changeset
   327
 *  be directed to and from the management interface.
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diff changeset
   328
 **/
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parents:
diff changeset
   329
bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw)
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diff changeset
   330
{
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diff changeset
   331
	u32 manc;
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parents:
diff changeset
   332
	u32 fwsm, factps;
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   333
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   334
	manc = er32(MANC);
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   335
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   336
	if (!(manc & E1000_MANC_RCV_TCO_EN))
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parents:
diff changeset
   337
		return false;
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parents:
diff changeset
   338
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   339
	if (hw->mac.has_fwsm) {
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   340
		fwsm = er32(FWSM);
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   341
		factps = er32(FACTPS);
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   342
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   343
		if (!(factps & E1000_FACTPS_MNGCG) &&
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   344
		    ((fwsm & E1000_FWSM_MODE_MASK) ==
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   345
		     (e1000_mng_mode_pt << E1000_FWSM_MODE_SHIFT)))
2b9c78543663 Reverted default branch to stable-1.5.
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parents:
diff changeset
   346
			return true;
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   347
	} else if ((hw->mac.type == e1000_82574) ||
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   348
		   (hw->mac.type == e1000_82583)) {
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   349
		u16 data;
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   350
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   351
		factps = er32(FACTPS);
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   352
		e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data);
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   353
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   354
		if (!(factps & E1000_FACTPS_MNGCG) &&
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   355
		    ((data & E1000_NVM_INIT_CTRL2_MNGM) ==
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   356
		     (e1000_mng_mode_pt << 13)))
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   357
			return true;
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   358
	} else if ((manc & E1000_MANC_SMBUS_EN) &&
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   359
		   !(manc & E1000_MANC_ASF_EN)) {
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   360
		return true;
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   361
	}
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   362
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   363
	return false;
2b9c78543663 Reverted default branch to stable-1.5.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   364
}