482 lines
14 KiB
C
482 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2013 - 2018 Intel Corporation. */
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#include "i40e.h"
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#include <linux/firmware.h>
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/**
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* i40e_ddp_profiles_eq - checks if DDP profiles are the equivalent
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* @a: new profile info
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* @b: old profile info
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*
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* checks if DDP profiles are the equivalent.
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* Returns true if profiles are the same.
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**/
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static bool i40e_ddp_profiles_eq(struct i40e_profile_info *a,
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struct i40e_profile_info *b)
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{
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return a->track_id == b->track_id &&
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!memcmp(&a->version, &b->version, sizeof(a->version)) &&
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!memcmp(&a->name, &b->name, I40E_DDP_NAME_SIZE);
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}
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/**
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* i40e_ddp_does_profile_exist - checks if DDP profile loaded already
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* @hw: HW data structure
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* @pinfo: DDP profile information structure
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*
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* checks if DDP profile loaded already.
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* Returns >0 if the profile exists.
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* Returns 0 if the profile is absent.
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* Returns <0 if error.
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**/
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static int i40e_ddp_does_profile_exist(struct i40e_hw *hw,
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struct i40e_profile_info *pinfo)
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{
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struct i40e_ddp_profile_list *profile_list;
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u8 buff[I40E_PROFILE_LIST_SIZE];
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int status;
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int i;
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status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
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NULL);
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if (status)
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return -1;
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profile_list = (struct i40e_ddp_profile_list *)buff;
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for (i = 0; i < profile_list->p_count; i++) {
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if (i40e_ddp_profiles_eq(pinfo, &profile_list->p_info[i]))
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return 1;
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}
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return 0;
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}
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/**
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* i40e_ddp_profiles_overlap - checks if DDP profiles overlap.
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* @new: new profile info
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* @old: old profile info
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*
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* checks if DDP profiles overlap.
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* Returns true if profiles are overlap.
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**/
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static bool i40e_ddp_profiles_overlap(struct i40e_profile_info *new,
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struct i40e_profile_info *old)
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{
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unsigned int group_id_old = (u8)((old->track_id & 0x00FF0000) >> 16);
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unsigned int group_id_new = (u8)((new->track_id & 0x00FF0000) >> 16);
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/* 0x00 group must be only the first */
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if (group_id_new == 0)
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return true;
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/* 0xFF group is compatible with anything else */
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if (group_id_new == 0xFF || group_id_old == 0xFF)
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return false;
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/* otherwise only profiles from the same group are compatible*/
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return group_id_old != group_id_new;
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}
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/**
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* i40e_ddp_does_profile_overlap - checks if DDP overlaps with existing one.
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* @hw: HW data structure
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* @pinfo: DDP profile information structure
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*
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* checks if DDP profile overlaps with existing one.
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* Returns >0 if the profile overlaps.
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* Returns 0 if the profile is ok.
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* Returns <0 if error.
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**/
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static int i40e_ddp_does_profile_overlap(struct i40e_hw *hw,
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struct i40e_profile_info *pinfo)
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{
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struct i40e_ddp_profile_list *profile_list;
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u8 buff[I40E_PROFILE_LIST_SIZE];
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int status;
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int i;
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status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
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NULL);
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if (status)
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return -EIO;
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profile_list = (struct i40e_ddp_profile_list *)buff;
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for (i = 0; i < profile_list->p_count; i++) {
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if (i40e_ddp_profiles_overlap(pinfo,
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&profile_list->p_info[i]))
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return 1;
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}
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return 0;
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}
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/**
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* i40e_add_pinfo
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* @hw: pointer to the hardware structure
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* @profile: pointer to the profile segment of the package
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* @profile_info_sec: buffer for information section
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* @track_id: package tracking id
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*
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* Register a profile to the list of loaded profiles.
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*/
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static int
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i40e_add_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
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u8 *profile_info_sec, u32 track_id)
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{
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struct i40e_profile_section_header *sec;
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struct i40e_profile_info *pinfo;
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u32 offset = 0, info = 0;
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int status;
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sec = (struct i40e_profile_section_header *)profile_info_sec;
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sec->tbl_size = 1;
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sec->data_end = sizeof(struct i40e_profile_section_header) +
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sizeof(struct i40e_profile_info);
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sec->section.type = SECTION_TYPE_INFO;
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sec->section.offset = sizeof(struct i40e_profile_section_header);
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sec->section.size = sizeof(struct i40e_profile_info);
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pinfo = (struct i40e_profile_info *)(profile_info_sec +
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sec->section.offset);
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pinfo->track_id = track_id;
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pinfo->version = profile->version;
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pinfo->op = I40E_DDP_ADD_TRACKID;
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/* Clear reserved field */
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memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
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memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);
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status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
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track_id, &offset, &info, NULL);
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return status;
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}
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/**
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* i40e_del_pinfo - delete DDP profile info from NIC
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* @hw: HW data structure
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* @profile: DDP profile segment to be deleted
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* @profile_info_sec: DDP profile section header
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* @track_id: track ID of the profile for deletion
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*
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* Removes DDP profile from the NIC.
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**/
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static int
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i40e_del_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
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u8 *profile_info_sec, u32 track_id)
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{
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struct i40e_profile_section_header *sec;
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struct i40e_profile_info *pinfo;
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u32 offset = 0, info = 0;
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int status;
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sec = (struct i40e_profile_section_header *)profile_info_sec;
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sec->tbl_size = 1;
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sec->data_end = sizeof(struct i40e_profile_section_header) +
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sizeof(struct i40e_profile_info);
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sec->section.type = SECTION_TYPE_INFO;
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sec->section.offset = sizeof(struct i40e_profile_section_header);
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sec->section.size = sizeof(struct i40e_profile_info);
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pinfo = (struct i40e_profile_info *)(profile_info_sec +
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sec->section.offset);
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pinfo->track_id = track_id;
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pinfo->version = profile->version;
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pinfo->op = I40E_DDP_REMOVE_TRACKID;
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/* Clear reserved field */
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memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
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memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);
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status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
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track_id, &offset, &info, NULL);
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return status;
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}
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/**
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* i40e_ddp_is_pkg_hdr_valid - performs basic pkg header integrity checks
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* @netdev: net device structure (for logging purposes)
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* @pkg_hdr: pointer to package header
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* @size_huge: size of the whole DDP profile package in size_t
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*
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* Checks correctness of pkg header: Version, size too big/small, and
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* all segment offsets alignment and boundaries. This function lets
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* reject non DDP profile file to be loaded by administrator mistake.
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**/
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static bool i40e_ddp_is_pkg_hdr_valid(struct net_device *netdev,
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struct i40e_package_header *pkg_hdr,
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size_t size_huge)
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{
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u32 size = 0xFFFFFFFFU & size_huge;
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u32 pkg_hdr_size;
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u32 segment;
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if (!pkg_hdr)
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return false;
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if (pkg_hdr->version.major > 0) {
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struct i40e_ddp_version ver = pkg_hdr->version;
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netdev_err(netdev, "Unsupported DDP profile version %u.%u.%u.%u",
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ver.major, ver.minor, ver.update, ver.draft);
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return false;
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}
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if (size_huge > size) {
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netdev_err(netdev, "Invalid DDP profile - size is bigger than 4G");
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return false;
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}
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if (size < (sizeof(struct i40e_package_header) +
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sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
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netdev_err(netdev, "Invalid DDP profile - size is too small.");
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return false;
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}
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pkg_hdr_size = sizeof(u32) * (pkg_hdr->segment_count + 2U);
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if (size < pkg_hdr_size) {
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netdev_err(netdev, "Invalid DDP profile - too many segments");
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return false;
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}
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for (segment = 0; segment < pkg_hdr->segment_count; ++segment) {
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u32 offset = pkg_hdr->segment_offset[segment];
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if (0xFU & offset) {
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netdev_err(netdev,
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"Invalid DDP profile %u segment alignment",
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segment);
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return false;
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}
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if (pkg_hdr_size > offset || offset >= size) {
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netdev_err(netdev,
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"Invalid DDP profile %u segment offset",
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segment);
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return false;
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}
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}
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return true;
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}
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/**
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* i40e_ddp_load - performs DDP loading
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* @netdev: net device structure
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* @data: buffer containing recipe file
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* @size: size of the buffer
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* @is_add: true when loading profile, false when rolling back the previous one
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*
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* Checks correctness and loads DDP profile to the NIC. The function is
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* also used for rolling back previously loaded profile.
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**/
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int i40e_ddp_load(struct net_device *netdev, const u8 *data, size_t size,
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bool is_add)
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{
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u8 profile_info_sec[sizeof(struct i40e_profile_section_header) +
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sizeof(struct i40e_profile_info)];
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struct i40e_metadata_segment *metadata_hdr;
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struct i40e_profile_segment *profile_hdr;
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struct i40e_profile_info pinfo;
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struct i40e_package_header *pkg_hdr;
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struct i40e_netdev_priv *np = netdev_priv(netdev);
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struct i40e_vsi *vsi = np->vsi;
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struct i40e_pf *pf = vsi->back;
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u32 track_id;
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int istatus;
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int status;
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pkg_hdr = (struct i40e_package_header *)data;
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if (!i40e_ddp_is_pkg_hdr_valid(netdev, pkg_hdr, size))
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return -EINVAL;
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if (size < (sizeof(struct i40e_package_header) +
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sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
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netdev_err(netdev, "Invalid DDP recipe size.");
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return -EINVAL;
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}
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/* Find beginning of segment data in buffer */
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metadata_hdr = (struct i40e_metadata_segment *)
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i40e_find_segment_in_package(SEGMENT_TYPE_METADATA, pkg_hdr);
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if (!metadata_hdr) {
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netdev_err(netdev, "Failed to find metadata segment in DDP recipe.");
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return -EINVAL;
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}
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track_id = metadata_hdr->track_id;
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profile_hdr = (struct i40e_profile_segment *)
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i40e_find_segment_in_package(SEGMENT_TYPE_I40E, pkg_hdr);
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if (!profile_hdr) {
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netdev_err(netdev, "Failed to find profile segment in DDP recipe.");
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return -EINVAL;
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}
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pinfo.track_id = track_id;
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pinfo.version = profile_hdr->version;
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if (is_add)
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pinfo.op = I40E_DDP_ADD_TRACKID;
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else
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pinfo.op = I40E_DDP_REMOVE_TRACKID;
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memcpy(pinfo.name, profile_hdr->name, I40E_DDP_NAME_SIZE);
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/* Check if profile data already exists*/
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istatus = i40e_ddp_does_profile_exist(&pf->hw, &pinfo);
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if (istatus < 0) {
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netdev_err(netdev, "Failed to fetch loaded profiles.");
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return istatus;
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}
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if (is_add) {
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if (istatus > 0) {
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netdev_err(netdev, "DDP profile already loaded.");
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return -EINVAL;
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}
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istatus = i40e_ddp_does_profile_overlap(&pf->hw, &pinfo);
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if (istatus < 0) {
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netdev_err(netdev, "Failed to fetch loaded profiles.");
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return istatus;
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}
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if (istatus > 0) {
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netdev_err(netdev, "DDP profile overlaps with existing one.");
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return -EINVAL;
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}
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} else {
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if (istatus == 0) {
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netdev_err(netdev,
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"DDP profile for deletion does not exist.");
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return -EINVAL;
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}
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}
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/* Load profile data */
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if (is_add) {
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status = i40e_write_profile(&pf->hw, profile_hdr, track_id);
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if (status) {
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if (status == I40E_ERR_DEVICE_NOT_SUPPORTED) {
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netdev_err(netdev,
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"Profile is not supported by the device.");
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return -EPERM;
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}
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netdev_err(netdev, "Failed to write DDP profile.");
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return -EIO;
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}
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} else {
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status = i40e_rollback_profile(&pf->hw, profile_hdr, track_id);
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if (status) {
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netdev_err(netdev, "Failed to remove DDP profile.");
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return -EIO;
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}
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}
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/* Add/remove profile to/from profile list in FW */
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if (is_add) {
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status = i40e_add_pinfo(&pf->hw, profile_hdr, profile_info_sec,
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track_id);
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if (status) {
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netdev_err(netdev, "Failed to add DDP profile info.");
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return -EIO;
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}
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} else {
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status = i40e_del_pinfo(&pf->hw, profile_hdr, profile_info_sec,
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track_id);
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if (status) {
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netdev_err(netdev, "Failed to restore DDP profile info.");
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return -EIO;
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}
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}
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return 0;
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}
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/**
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* i40e_ddp_restore - restore previously loaded profile and remove from list
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* @pf: PF data struct
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*
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* Restores previously loaded profile stored on the list in driver memory.
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* After rolling back removes entry from the list.
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**/
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static int i40e_ddp_restore(struct i40e_pf *pf)
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{
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struct i40e_ddp_old_profile_list *entry;
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struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
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int status = 0;
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if (!list_empty(&pf->ddp_old_prof)) {
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entry = list_first_entry(&pf->ddp_old_prof,
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struct i40e_ddp_old_profile_list,
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list);
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status = i40e_ddp_load(netdev, entry->old_ddp_buf,
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entry->old_ddp_size, false);
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list_del(&entry->list);
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kfree(entry);
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}
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return status;
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}
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/**
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* i40e_ddp_flash - callback function for ethtool flash feature
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* @netdev: net device structure
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* @flash: kernel flash structure
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*
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* Ethtool callback function used for loading and unloading DDP profiles.
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**/
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int i40e_ddp_flash(struct net_device *netdev, struct ethtool_flash *flash)
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{
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const struct firmware *ddp_config;
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struct i40e_netdev_priv *np = netdev_priv(netdev);
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struct i40e_vsi *vsi = np->vsi;
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struct i40e_pf *pf = vsi->back;
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int status = 0;
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/* Check for valid region first */
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if (flash->region != I40_DDP_FLASH_REGION) {
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netdev_err(netdev, "Requested firmware region is not recognized by this driver.");
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return -EINVAL;
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}
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if (pf->hw.bus.func != 0) {
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netdev_err(netdev, "Any DDP operation is allowed only on Phy0 NIC interface");
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return -EINVAL;
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}
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/* If the user supplied "-" instead of file name rollback previously
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* stored profile.
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*/
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if (strncmp(flash->data, "-", 2) != 0) {
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struct i40e_ddp_old_profile_list *list_entry;
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char profile_name[sizeof(I40E_DDP_PROFILE_PATH)
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+ I40E_DDP_PROFILE_NAME_MAX];
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profile_name[sizeof(profile_name) - 1] = 0;
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strncpy(profile_name, I40E_DDP_PROFILE_PATH,
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sizeof(profile_name) - 1);
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strncat(profile_name, flash->data, I40E_DDP_PROFILE_NAME_MAX);
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/* Load DDP recipe. */
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status = request_firmware(&ddp_config, profile_name,
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&netdev->dev);
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if (status) {
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netdev_err(netdev, "DDP recipe file request failed.");
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return status;
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}
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status = i40e_ddp_load(netdev, ddp_config->data,
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ddp_config->size, true);
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if (!status) {
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list_entry =
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kzalloc(sizeof(struct i40e_ddp_old_profile_list) +
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ddp_config->size, GFP_KERNEL);
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if (!list_entry) {
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netdev_info(netdev, "Failed to allocate memory for previous DDP profile data.");
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netdev_info(netdev, "New profile loaded but roll-back will be impossible.");
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} else {
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memcpy(list_entry->old_ddp_buf,
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ddp_config->data, ddp_config->size);
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list_entry->old_ddp_size = ddp_config->size;
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list_add(&list_entry->list, &pf->ddp_old_prof);
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}
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}
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release_firmware(ddp_config);
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} else {
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if (!list_empty(&pf->ddp_old_prof)) {
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status = i40e_ddp_restore(pf);
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} else {
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netdev_warn(netdev, "There is no DDP profile to restore.");
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status = -ENOENT;
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}
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}
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return status;
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}
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