intel/e1000e/manage.c

1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
7  *  e1000_calculate_checksum - Calculate checksum for buffer
25 	return (u8)(0 - sum);  in e1000_calculate_checksum()
29  *  e1000_mng_enable_host_if - Checks host interface is enabled
32  *  Returns 0 upon success, else -E1000_ERR_HOST_INTERFACE_COMMAND
34  *  This function checks whether the HOST IF is enabled for command operation
35  *  and also checks whether the previous command is completed.  It busy waits
36  *  in case of previous command is not completed.
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()
48 	/* Check that the host interface is enabled. */  in e1000_mng_enable_host_if()
52 		return -E1000_ERR_HOST_INTERFACE_COMMAND;  in e1000_mng_enable_host_if()
54 	/* check the previous command is completed */  in e1000_mng_enable_host_if()
63 		e_dbg("Previous command timeout failed.\n");  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
86  *  e1000e_enable_tx_pkt_filtering - Enable packet filtering on Tx
90  *  and host interface is enabled.
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()
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()
108 	/* If we can't read from the host interface for whatever  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()
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
146  *  @hdr: pointer to the host interface command header
148  *  Writes the command header after does the checksum calculation.
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()
160 	/* Write the relevant command block into the ram area. */  in e1000_mng_write_cmd_header()
170  *  e1000_mng_host_if_write - Write to the manageability host interface
172  *  @buffer: pointer to the host interface buffer
177  *  This function writes the buffer content at the offset given on the host if.
192 		return -E1000_ERR_PARAM;  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()
215 	/* The device driver writes the relevant command block into the  in e1000_mng_host_if_write()
242  *  e1000e_mng_write_dhcp_info - Writes DHCP info to host interface
244  *  @buffer: pointer to the host interface
247  *  Writes the DHCP information to the host interface.
261 	/* Enable the host interface */  in e1000e_mng_write_dhcp_info()
266 	/* Populate the host interface with the contents of "buffer". */  in e1000e_mng_write_dhcp_info()
272 	/* Write the manageability command header */  in e1000e_mng_write_dhcp_info()
277 	/* Tell the ARC a new command is pending. */  in e1000e_mng_write_dhcp_info()
285  *  e1000e_enable_mng_pass_thru - Check if management passthrough is needed
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()