1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
7  *  e1000_calculate_checksum - Calculate checksum for buffer
9  *  @length: size of EEPROM to calculate a checksum for
11  *  Calculates the checksum for some buffer on a specified length.  The
12  *  checksum calculated is returned.
25 	return (u8)(0 - sum);  in e1000_calculate_checksum()
29  *  e1000_mng_enable_host_if - Checks host interface is enabled
30  *  @hw: pointer to the HW structure
32  *  Returns 0 upon success, else -E1000_ERR_HOST_INTERFACE_COMMAND
38 static s32 e1000_mng_enable_host_if(struct e1000_hw *hw)  in e1000_mng_enable_host_if()  argument
43 	if (!hw->mac.arc_subsystem_valid) {  in e1000_mng_enable_host_if()
45 		return -E1000_ERR_HOST_INTERFACE_COMMAND;  in e1000_mng_enable_host_if()
52 		return -E1000_ERR_HOST_INTERFACE_COMMAND;  in e1000_mng_enable_host_if()
64 		return -E1000_ERR_HOST_INTERFACE_COMMAND;  in e1000_mng_enable_host_if()
71  *  e1000e_check_mng_mode_generic - Generic check management mode
72  *  @hw: pointer to the HW structure
77 bool e1000e_check_mng_mode_generic(struct e1000_hw *hw)  in e1000e_check_mng_mode_generic()  argument
86  *  e1000e_enable_tx_pkt_filtering - Enable packet filtering on Tx
87  *  @hw: pointer to the HW structure
92 bool e1000e_enable_tx_pkt_filtering(struct e1000_hw *hw)  in e1000e_enable_tx_pkt_filtering()  argument
94 	struct e1000_host_mng_dhcp_cookie *hdr = &hw->mng_cookie;  in e1000e_enable_tx_pkt_filtering()
95 	u32 *buffer = (u32 *)&hw->mng_cookie;  in e1000e_enable_tx_pkt_filtering()
100 	hw->mac.tx_pkt_filtering = true;  in e1000e_enable_tx_pkt_filtering()
102 	/* No manageability, no filtering */  in e1000e_enable_tx_pkt_filtering()
103 	if (!hw->mac.ops.check_mng_mode(hw)) {  in e1000e_enable_tx_pkt_filtering()
104 		hw->mac.tx_pkt_filtering = false;  in e1000e_enable_tx_pkt_filtering()
105 		return hw->mac.tx_pkt_filtering;  in e1000e_enable_tx_pkt_filtering()
111 	ret_val = e1000_mng_enable_host_if(hw);  in e1000e_enable_tx_pkt_filtering()
113 		hw->mac.tx_pkt_filtering = false;  in e1000e_enable_tx_pkt_filtering()
114 		return hw->mac.tx_pkt_filtering;  in e1000e_enable_tx_pkt_filtering()
121 		*(buffer + i) = E1000_READ_REG_ARRAY(hw, E1000_HOST_IF,  in e1000e_enable_tx_pkt_filtering()
123 	hdr_csum = hdr->checksum;  in e1000e_enable_tx_pkt_filtering()
124 	hdr->checksum = 0;  in e1000e_enable_tx_pkt_filtering()
131 	if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) {  in e1000e_enable_tx_pkt_filtering()
132 		hw->mac.tx_pkt_filtering = true;  in e1000e_enable_tx_pkt_filtering()
133 		return hw->mac.tx_pkt_filtering;  in e1000e_enable_tx_pkt_filtering()
137 	if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING))  in e1000e_enable_tx_pkt_filtering()
138 		hw->mac.tx_pkt_filtering = false;  in e1000e_enable_tx_pkt_filtering()
140 	return hw->mac.tx_pkt_filtering;  in e1000e_enable_tx_pkt_filtering()
144  *  e1000_mng_write_cmd_header - Writes manageability command header
145  *  @hw: pointer to the HW structure
148  *  Writes the command header after does the checksum calculation.
150 static s32 e1000_mng_write_cmd_header(struct e1000_hw *hw,  in e1000_mng_write_cmd_header()  argument
155 	/* Write the whole command header structure with new checksum. */  in e1000_mng_write_cmd_header()
157 	hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length);  in e1000_mng_write_cmd_header()
162 		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, i, *((u32 *)hdr + i));  in e1000_mng_write_cmd_header()
170  *  e1000_mng_host_if_write - Write to the manageability host interface
171  *  @hw: pointer to the HW structure
175  *  @sum: sum of the data (not checksum)
181 static s32 e1000_mng_host_if_write(struct e1000_hw *hw, u8 *buffer,  in e1000_mng_host_if_write()  argument
189 	/* sum = only sum of the data and it is not checksum */  in e1000_mng_host_if_write()
192 		return -E1000_ERR_PARAM;  in e1000_mng_host_if_write()
199 		data = E1000_READ_REG_ARRAY(hw, E1000_HOST_IF, offset);  in e1000_mng_host_if_write()
204 		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset, data);  in e1000_mng_host_if_write()
205 		length -= j - prev_bytes;  in e1000_mng_host_if_write()
210 	length -= remaining;  in e1000_mng_host_if_write()
224 		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset + i, data);  in e1000_mng_host_if_write()
235 		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset + i, data);  in e1000_mng_host_if_write()
242  *  e1000e_mng_write_dhcp_info - Writes DHCP info to host interface
243  *  @hw: pointer to the HW structure
249 s32 e1000e_mng_write_dhcp_info(struct e1000_hw *hw, u8 *buffer, u16 length)  in e1000e_mng_write_dhcp_info()  argument
259 	hdr.checksum = 0;  in e1000e_mng_write_dhcp_info()
262 	ret_val = e1000_mng_enable_host_if(hw);  in e1000e_mng_write_dhcp_info()
267 	ret_val = e1000_mng_host_if_write(hw, buffer, length,  in e1000e_mng_write_dhcp_info()
268 					  sizeof(hdr), &(hdr.checksum));  in e1000e_mng_write_dhcp_info()
273 	ret_val = e1000_mng_write_cmd_header(hw, &hdr);  in e1000e_mng_write_dhcp_info()
285  *  e1000e_enable_mng_pass_thru - Check if management passthrough is needed
286  *  @hw: pointer to the HW structure
291 bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw)  in e1000e_enable_mng_pass_thru()  argument
301 	if (hw->mac.has_fwsm) {  in e1000e_enable_mng_pass_thru()
309 	} else if ((hw->mac.type == e1000_82574) ||  in e1000e_enable_mng_pass_thru()
310 		   (hw->mac.type == e1000_82583)) {  in e1000e_enable_mng_pass_thru()
315 		ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data);  in e1000e_enable_mng_pass_thru()