drivers/net/ethernet/intel/i40e/i40e_ddp.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /* Copyright(c) 2013 - 2018 Intel Corporation. */

 #include "i40e.h"

 #include <linux/firmware.h>

 /**
  * i40e_ddp_profiles_eq - checks if DDP profiles are the equivalent
  * @a: new profile info
  * @b: old profile info
  *
  * checks if DDP profiles are the equivalent.
  * Returns true if profiles are the same.
  **/
 static bool i40e_ddp_profiles_eq(struct i40e_profile_info *a,
 				 struct i40e_profile_info *b)
 {
 	return a->track_id == b->track_id &&
 		!memcmp(&a->version, &b->version, sizeof(a->version)) &&
 		!memcmp(&a->name, &b->name, I40E_DDP_NAME_SIZE);
 }

 /**
  * i40e_ddp_does_profile_exist - checks if DDP profile loaded already
  * @hw: HW data structure
  * @pinfo: DDP profile information structure
  *
  * checks if DDP profile loaded already.
  * Returns >0 if the profile exists.
  * Returns  0 if the profile is absent.
  * Returns <0 if error.
  **/
 static int i40e_ddp_does_profile_exist(struct i40e_hw *hw,
 				       struct i40e_profile_info *pinfo)
 {
 	struct i40e_ddp_profile_list *profile_list;
 	u8 buff[I40E_PROFILE_LIST_SIZE];
 	i40e_status status;
 	int i;

 	status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
 				      NULL);
 	if (status)
 		return -1;

 	profile_list = (struct i40e_ddp_profile_list *)buff;
 	for (i = 0; i < profile_list->p_count; i++) {
 		if (i40e_ddp_profiles_eq(pinfo, &profile_list->p_info[i]))
 			return 1;
 	}
 	return 0;
 }

 /**
  * i40e_ddp_profiles_overlap - checks if DDP profiles overlap.
  * @new: new profile info
  * @old: old profile info
  *
  * checks if DDP profiles overlap.
  * Returns true if profiles are overlap.
  **/
 static bool i40e_ddp_profiles_overlap(struct i40e_profile_info *new,
 				      struct i40e_profile_info *old)
 {
 	unsigned int group_id_old = (u8)((old->track_id & 0x00FF0000) >> 16);
 	unsigned int group_id_new = (u8)((new->track_id & 0x00FF0000) >> 16);

 	/* 0x00 group must be only the first */
 	if (group_id_new == 0)
 		return true;
 	/* 0xFF group is compatible with anything else */
 	if (group_id_new == 0xFF || group_id_old == 0xFF)
 		return false;
 	/* otherwise only profiles from the same group are compatible*/
 	return group_id_old != group_id_new;
 }

 /**
  * i40e_ddp_does_profile_overlap - checks if DDP overlaps with existing one.
  * @hw: HW data structure
  * @pinfo: DDP profile information structure
  *
  * checks if DDP profile overlaps with existing one.
  * Returns >0 if the profile overlaps.
  * Returns  0 if the profile is ok.
  * Returns <0 if error.
  **/
 static int i40e_ddp_does_profile_overlap(struct i40e_hw *hw,
 					 struct i40e_profile_info *pinfo)
 {
 	struct i40e_ddp_profile_list *profile_list;
 	u8 buff[I40E_PROFILE_LIST_SIZE];
 	i40e_status status;
 	int i;

 	status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
 				      NULL);
 	if (status)
 		return -EIO;

 	profile_list = (struct i40e_ddp_profile_list *)buff;
 	for (i = 0; i < profile_list->p_count; i++) {
 		if (i40e_ddp_profiles_overlap(pinfo,
 					      &profile_list->p_info[i]))
 			return 1;
 	}
 	return 0;
 }

 /**
  * i40e_add_pinfo
  * @hw: pointer to the hardware structure
  * @profile: pointer to the profile segment of the package
  * @profile_info_sec: buffer for information section
  * @track_id: package tracking id
  *
  * Register a profile to the list of loaded profiles.
  */
 static enum i40e_status_code
 i40e_add_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
 	       u8 *profile_info_sec, u32 track_id)
 {
 	struct i40e_profile_section_header *sec;
 	struct i40e_profile_info *pinfo;
 	i40e_status status;
 	u32 offset = 0, info = 0;

 	sec = (struct i40e_profile_section_header *)profile_info_sec;
 	sec->tbl_size = 1;
 	sec->data_end = sizeof(struct i40e_profile_section_header) +
 			sizeof(struct i40e_profile_info);
 	sec->section.type = SECTION_TYPE_INFO;
 	sec->section.offset = sizeof(struct i40e_profile_section_header);
 	sec->section.size = sizeof(struct i40e_profile_info);
 	pinfo = (struct i40e_profile_info *)(profile_info_sec +
 					     sec->section.offset);
 	pinfo->track_id = track_id;
 	pinfo->version = profile->version;
 	pinfo->op = I40E_DDP_ADD_TRACKID;

 	/* Clear reserved field */
 	memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
 	memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);

 	status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
 				   track_id, &offset, &info, NULL);
 	return status;
 }

 /**
  * i40e_del_pinfo - delete DDP profile info from NIC
  * @hw: HW data structure
  * @profile: DDP profile segment to be deleted
  * @profile_info_sec: DDP profile section header
  * @track_id: track ID of the profile for deletion
  *
  * Removes DDP profile from the NIC.
  **/
 static enum i40e_status_code
 i40e_del_pinfo(struct i40e_hw *hw, struct i40e_profile_segment *profile,
 	       u8 *profile_info_sec, u32 track_id)
 {
 	struct i40e_profile_section_header *sec;
 	struct i40e_profile_info *pinfo;
 	i40e_status status;
 	u32 offset = 0, info = 0;

 	sec = (struct i40e_profile_section_header *)profile_info_sec;
 	sec->tbl_size = 1;
 	sec->data_end = sizeof(struct i40e_profile_section_header) +
 			sizeof(struct i40e_profile_info);
 	sec->section.type = SECTION_TYPE_INFO;
 	sec->section.offset = sizeof(struct i40e_profile_section_header);
 	sec->section.size = sizeof(struct i40e_profile_info);
 	pinfo = (struct i40e_profile_info *)(profile_info_sec +
 					     sec->section.offset);
 	pinfo->track_id = track_id;
 	pinfo->version = profile->version;
 	pinfo->op = I40E_DDP_REMOVE_TRACKID;

 	/* Clear reserved field */
 	memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
 	memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);

 	status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
 				   track_id, &offset, &info, NULL);
 	return status;
 }

 /**
  * i40e_ddp_is_pkg_hdr_valid - performs basic pkg header integrity checks
  * @netdev: net device structure (for logging purposes)
  * @pkg_hdr: pointer to package header
  * @size_huge: size of the whole DDP profile package in size_t
  *
  * Checks correctness of pkg header: Version, size too big/small, and
  * all segment offsets alignment and boundaries. This function lets
  * reject non DDP profile file to be loaded by administrator mistake.
  **/
 static bool i40e_ddp_is_pkg_hdr_valid(struct net_device *netdev,
 				      struct i40e_package_header *pkg_hdr,
 				      size_t size_huge)
 {
 	u32 size = 0xFFFFFFFFU & size_huge;
 	u32 pkg_hdr_size;
 	u32 segment;

 	if (!pkg_hdr)
 		return false;

 	if (pkg_hdr->version.major > 0) {
 		struct i40e_ddp_version ver = pkg_hdr->version;

 		netdev_err(netdev, "Unsupported DDP profile version %u.%u.%u.%u",
 			   ver.major, ver.minor, ver.update, ver.draft);
 		return false;
 	}
 	if (size_huge > size) {
 		netdev_err(netdev, "Invalid DDP profile - size is bigger than 4G");
 		return false;
 	}
 	if (size < (sizeof(struct i40e_package_header) +
 		sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
 		netdev_err(netdev, "Invalid DDP profile - size is too small.");
 		return false;
 	}

 	pkg_hdr_size = sizeof(u32) * (pkg_hdr->segment_count + 2U);
 	if (size < pkg_hdr_size) {
 		netdev_err(netdev, "Invalid DDP profile - too many segments");
 		return false;
 	}
 	for (segment = 0; segment < pkg_hdr->segment_count; ++segment) {
 		u32 offset = pkg_hdr->segment_offset[segment];

 		if (0xFU & offset) {
 			netdev_err(netdev,
 				   "Invalid DDP profile %u segment alignment",
 				   segment);
 			return false;
 		}
 		if (pkg_hdr_size > offset || offset >= size) {
 			netdev_err(netdev,
 				   "Invalid DDP profile %u segment offset",
 				   segment);
 			return false;
 		}
 	}

 	return true;
 }

 /**
  * i40e_ddp_load - performs DDP loading
  * @netdev: net device structure
  * @data: buffer containing recipe file
  * @size: size of the buffer
  * @is_add: true when loading profile, false when rolling back the previous one
  *
  * Checks correctness and loads DDP profile to the NIC. The function is
  * also used for rolling back previously loaded profile.
  **/
 int i40e_ddp_load(struct net_device *netdev, const u8 *data, size_t size,
 		  bool is_add)
 {
 	u8 profile_info_sec[sizeof(struct i40e_profile_section_header) +
 			    sizeof(struct i40e_profile_info)];
 	struct i40e_metadata_segment *metadata_hdr;
 	struct i40e_profile_segment *profile_hdr;
 	struct i40e_profile_info pinfo;
 	struct i40e_package_header *pkg_hdr;
 	i40e_status status;
 	struct i40e_netdev_priv *np = netdev_priv(netdev);
 	struct i40e_vsi *vsi = np->vsi;
 	struct i40e_pf *pf = vsi->back;
 	u32 track_id;
 	int istatus;

 	pkg_hdr = (struct i40e_package_header *)data;
 	if (!i40e_ddp_is_pkg_hdr_valid(netdev, pkg_hdr, size))
 		return -EINVAL;

 	if (size < (sizeof(struct i40e_package_header) +
 		    sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
 		netdev_err(netdev, "Invalid DDP recipe size.");
 		return -EINVAL;
 	}

 	/* Find beginning of segment data in buffer */
 	metadata_hdr = (struct i40e_metadata_segment *)
 		i40e_find_segment_in_package(SEGMENT_TYPE_METADATA, pkg_hdr);
 	if (!metadata_hdr) {
 		netdev_err(netdev, "Failed to find metadata segment in DDP recipe.");
 		return -EINVAL;
 	}

 	track_id = metadata_hdr->track_id;
 	profile_hdr = (struct i40e_profile_segment *)
 		i40e_find_segment_in_package(SEGMENT_TYPE_I40E, pkg_hdr);
 	if (!profile_hdr) {
 		netdev_err(netdev, "Failed to find profile segment in DDP recipe.");
 		return -EINVAL;
 	}

 	pinfo.track_id = track_id;
 	pinfo.version = profile_hdr->version;
 	if (is_add)
 		pinfo.op = I40E_DDP_ADD_TRACKID;
 	else
 		pinfo.op = I40E_DDP_REMOVE_TRACKID;

 	memcpy(pinfo.name, profile_hdr->name, I40E_DDP_NAME_SIZE);

 	/* Check if profile data already exists*/
 	istatus = i40e_ddp_does_profile_exist(&pf->hw, &pinfo);
 	if (istatus < 0) {
 		netdev_err(netdev, "Failed to fetch loaded profiles.");
 		return istatus;
 	}
 	if (is_add) {
 		if (istatus > 0) {
 			netdev_err(netdev, "DDP profile already loaded.");
 			return -EINVAL;
 		}
 		istatus = i40e_ddp_does_profile_overlap(&pf->hw, &pinfo);
 		if (istatus < 0) {
 			netdev_err(netdev, "Failed to fetch loaded profiles.");
 			return istatus;
 		}
 		if (istatus > 0) {
 			netdev_err(netdev, "DDP profile overlaps with existing one.");
 			return -EINVAL;
 		}
 	} else {
 		if (istatus == 0) {
 			netdev_err(netdev,
 				   "DDP profile for deletion does not exist.");
 			return -EINVAL;
 		}
 	}

 	/* Load profile data */
 	if (is_add) {
 		status = i40e_write_profile(&pf->hw, profile_hdr, track_id);
 		if (status) {
 			if (status == I40E_ERR_DEVICE_NOT_SUPPORTED) {
 				netdev_err(netdev,
 					   "Profile is not supported by the device.");
 				return -EPERM;
 			}
 			netdev_err(netdev, "Failed to write DDP profile.");
 			return -EIO;
 		}
 	} else {
 		status = i40e_rollback_profile(&pf->hw, profile_hdr, track_id);
 		if (status) {
 			netdev_err(netdev, "Failed to remove DDP profile.");
 			return -EIO;
 		}
 	}

 	/* Add/remove profile to/from profile list in FW */
 	if (is_add) {
 		status = i40e_add_pinfo(&pf->hw, profile_hdr, profile_info_sec,
 					track_id);
 		if (status) {
 			netdev_err(netdev, "Failed to add DDP profile info.");
 			return -EIO;
 		}
 	} else {
 		status = i40e_del_pinfo(&pf->hw, profile_hdr, profile_info_sec,
 					track_id);
 		if (status) {
 			netdev_err(netdev, "Failed to restore DDP profile info.");
 			return -EIO;
 		}
 	}

 	return 0;
 }

 /**
  * i40e_ddp_restore - restore previously loaded profile and remove from list
  * @pf: PF data struct
  *
  * Restores previously loaded profile stored on the list in driver memory.
  * After rolling back removes entry from the list.
  **/
 static int i40e_ddp_restore(struct i40e_pf *pf)
 {
 	struct i40e_ddp_old_profile_list *entry;
 	struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
 	int status = 0;

 	if (!list_empty(&pf->ddp_old_prof)) {
 		entry = list_first_entry(&pf->ddp_old_prof,
 					 struct i40e_ddp_old_profile_list,
 					 list);
 		status = i40e_ddp_load(netdev, entry->old_ddp_buf,
 				       entry->old_ddp_size, false);
 		list_del(&entry->list);
 		kfree(entry);
 	}
 	return status;
 }

 /**
  * i40e_ddp_flash - callback function for ethtool flash feature
  * @netdev: net device structure
  * @flash: kernel flash structure
  *
  * Ethtool callback function used for loading and unloading DDP profiles.
  **/
 int i40e_ddp_flash(struct net_device *netdev, struct ethtool_flash *flash)
 {
 	const struct firmware *ddp_config;
 	struct i40e_netdev_priv *np = netdev_priv(netdev);
 	struct i40e_vsi *vsi = np->vsi;
 	struct i40e_pf *pf = vsi->back;
 	int status = 0;

 	/* Check for valid region first */
 	if (flash->region != I40_DDP_FLASH_REGION) {
 		netdev_err(netdev, "Requested firmware region is not recognized by this driver.");
 		return -EINVAL;
 	}
 	if (pf->hw.bus.func != 0) {
 		netdev_err(netdev, "Any DDP operation is allowed only on Phy0 NIC interface");
 		return -EINVAL;
 	}

 	/* If the user supplied "-" instead of file name rollback previously
 	 * stored profile.
 	 */
 	if (strncmp(flash->data, "-", 2) != 0) {
 		struct i40e_ddp_old_profile_list *list_entry;
 		char profile_name[sizeof(I40E_DDP_PROFILE_PATH)
 				  + I40E_DDP_PROFILE_NAME_MAX];

 		profile_name[sizeof(profile_name) - 1] = 0;
 		strncpy(profile_name, I40E_DDP_PROFILE_PATH,
 			sizeof(profile_name) - 1);
 		strncat(profile_name, flash->data, I40E_DDP_PROFILE_NAME_MAX);
 		/* Load DDP recipe. */
 		status = request_firmware(&ddp_config, profile_name,
 					  &netdev->dev);
 		if (status) {
 			netdev_err(netdev, "DDP recipe file request failed.");
 			return status;
 		}

 		status = i40e_ddp_load(netdev, ddp_config->data,
 				       ddp_config->size, true);

 		if (!status) {
 			list_entry =
 			  kzalloc(sizeof(struct i40e_ddp_old_profile_list) +
 				  ddp_config->size, GFP_KERNEL);
 			if (!list_entry) {
 				netdev_info(netdev, "Failed to allocate memory for previous DDP profile data.");
 				netdev_info(netdev, "New profile loaded but roll-back will be impossible.");
 			} else {
 				memcpy(list_entry->old_ddp_buf,
 				       ddp_config->data, ddp_config->size);
 				list_entry->old_ddp_size = ddp_config->size;
 				list_add(&list_entry->list, &pf->ddp_old_prof);
 			}
 		}

 		release_firmware(ddp_config);
 	} else {
 		if (!list_empty(&pf->ddp_old_prof)) {
 			status = i40e_ddp_restore(pf);
 		} else {
 			netdev_warn(netdev, "There is no DDP profile to restore.");
 			status = -ENOENT;
 		}
 	}
 	return status;
 }
	// SPDX-License-Identifier: GPL-2.0
	/* Copyright(c) 2013 - 2018 Intel Corporation. */

	#include "i40e.h"

	#include <linux/firmware.h>

	/**
	* i40e_ddp_profiles_eq - checks if DDP profiles are the equivalent
	* @a: new profile info
	* @b: old profile info
	*
	* checks if DDP profiles are the equivalent.
	* Returns true if profiles are the same.
	**/
	static bool i40e_ddp_profiles_eq(struct i40e_profile_info *a,
	struct i40e_profile_info *b)
	{
	return a->track_id == b->track_id &&
	!memcmp(&a->version, &b->version, sizeof(a->version)) &&
	!memcmp(&a->name, &b->name, I40E_DDP_NAME_SIZE);
	}

	/**
	* i40e_ddp_does_profile_exist - checks if DDP profile loaded already
	* @hw: HW data structure
	* @pinfo: DDP profile information structure
	*
	* checks if DDP profile loaded already.
	* Returns >0 if the profile exists.
	* Returns 0 if the profile is absent.
	* Returns <0 if error.
	**/
	static int i40e_ddp_does_profile_exist(struct i40e_hw *hw,
	struct i40e_profile_info *pinfo)
	{
	struct i40e_ddp_profile_list *profile_list;
	u8 buff[I40E_PROFILE_LIST_SIZE];
	i40e_status status;
	int i;

	status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
	NULL);
	if (status)
	return -1;

	profile_list = (struct i40e_ddp_profile_list *)buff;
	for (i = 0; i < profile_list->p_count; i++) {
	if (i40e_ddp_profiles_eq(pinfo, &profile_list->p_info[i]))
	return 1;
	}
	return 0;
	}

	/**
	* i40e_ddp_profiles_overlap - checks if DDP profiles overlap.
	* @new: new profile info
	* @old: old profile info
	*
	* checks if DDP profiles overlap.
	* Returns true if profiles are overlap.
	**/
	static bool i40e_ddp_profiles_overlap(struct i40e_profile_info *new,
	struct i40e_profile_info *old)
	{
	unsigned int group_id_old = (u8)((old->track_id & 0x00FF0000) >> 16);
	unsigned int group_id_new = (u8)((new->track_id & 0x00FF0000) >> 16);

	/* 0x00 group must be only the first */
	if (group_id_new == 0)
	return true;
	/* 0xFF group is compatible with anything else */
	if (group_id_new == 0xFF \|\| group_id_old == 0xFF)
	return false;
	/* otherwise only profiles from the same group are compatible*/
	return group_id_old != group_id_new;
	}

	/**
	* i40e_ddp_does_profile_overlap - checks if DDP overlaps with existing one.
	* @hw: HW data structure
	* @pinfo: DDP profile information structure
	*
	* checks if DDP profile overlaps with existing one.
	* Returns >0 if the profile overlaps.
	* Returns 0 if the profile is ok.
	* Returns <0 if error.
	**/
	static int i40e_ddp_does_profile_overlap(struct i40e_hw *hw,
	struct i40e_profile_info *pinfo)
	{
	struct i40e_ddp_profile_list *profile_list;
	u8 buff[I40E_PROFILE_LIST_SIZE];
	i40e_status status;
	int i;

	status = i40e_aq_get_ddp_list(hw, buff, I40E_PROFILE_LIST_SIZE, 0,
	NULL);
	if (status)
	return -EIO;

	profile_list = (struct i40e_ddp_profile_list *)buff;
	for (i = 0; i < profile_list->p_count; i++) {
	if (i40e_ddp_profiles_overlap(pinfo,
	&profile_list->p_info[i]))
	return 1;
	}
	return 0;
	}

	/**
	* i40e_add_pinfo
	* @hw: pointer to the hardware structure
	* @profile: pointer to the profile segment of the package
	* @profile_info_sec: buffer for information section
	* @track_id: package tracking id
	*
	* Register a profile to the list of loaded profiles.
	*/
	static enum i40e_status_code
	i40e_add_pinfo(struct i40e_hw hw, struct i40e_profile_segment profile,
	u8 *profile_info_sec, u32 track_id)
	{
	struct i40e_profile_section_header *sec;
	struct i40e_profile_info *pinfo;
	i40e_status status;
	u32 offset = 0, info = 0;

	sec = (struct i40e_profile_section_header *)profile_info_sec;
	sec->tbl_size = 1;
	sec->data_end = sizeof(struct i40e_profile_section_header) +
	sizeof(struct i40e_profile_info);
	sec->section.type = SECTION_TYPE_INFO;
	sec->section.offset = sizeof(struct i40e_profile_section_header);
	sec->section.size = sizeof(struct i40e_profile_info);
	pinfo = (struct i40e_profile_info *)(profile_info_sec +
	sec->section.offset);
	pinfo->track_id = track_id;
	pinfo->version = profile->version;
	pinfo->op = I40E_DDP_ADD_TRACKID;

	/* Clear reserved field */
	memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
	memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);

	status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
	track_id, &offset, &info, NULL);
	return status;
	}

	/**
	* i40e_del_pinfo - delete DDP profile info from NIC
	* @hw: HW data structure
	* @profile: DDP profile segment to be deleted
	* @profile_info_sec: DDP profile section header
	* @track_id: track ID of the profile for deletion
	*
	* Removes DDP profile from the NIC.
	**/
	static enum i40e_status_code
	i40e_del_pinfo(struct i40e_hw hw, struct i40e_profile_segment profile,
	u8 *profile_info_sec, u32 track_id)
	{
	struct i40e_profile_section_header *sec;
	struct i40e_profile_info *pinfo;
	i40e_status status;
	u32 offset = 0, info = 0;

	sec = (struct i40e_profile_section_header *)profile_info_sec;
	sec->tbl_size = 1;
	sec->data_end = sizeof(struct i40e_profile_section_header) +
	sizeof(struct i40e_profile_info);
	sec->section.type = SECTION_TYPE_INFO;
	sec->section.offset = sizeof(struct i40e_profile_section_header);
	sec->section.size = sizeof(struct i40e_profile_info);
	pinfo = (struct i40e_profile_info *)(profile_info_sec +
	sec->section.offset);
	pinfo->track_id = track_id;
	pinfo->version = profile->version;
	pinfo->op = I40E_DDP_REMOVE_TRACKID;

	/* Clear reserved field */
	memset(pinfo->reserved, 0, sizeof(pinfo->reserved));
	memcpy(pinfo->name, profile->name, I40E_DDP_NAME_SIZE);

	status = i40e_aq_write_ddp(hw, (void *)sec, sec->data_end,
	track_id, &offset, &info, NULL);
	return status;
	}

	/**
	* i40e_ddp_is_pkg_hdr_valid - performs basic pkg header integrity checks
	* @netdev: net device structure (for logging purposes)
	* @pkg_hdr: pointer to package header
	* @size_huge: size of the whole DDP profile package in size_t
	*
	* Checks correctness of pkg header: Version, size too big/small, and
	* all segment offsets alignment and boundaries. This function lets
	* reject non DDP profile file to be loaded by administrator mistake.
	**/
	static bool i40e_ddp_is_pkg_hdr_valid(struct net_device *netdev,
	struct i40e_package_header *pkg_hdr,
	size_t size_huge)
	{
	u32 size = 0xFFFFFFFFU & size_huge;
	u32 pkg_hdr_size;
	u32 segment;

	if (!pkg_hdr)
	return false;

	if (pkg_hdr->version.major > 0) {
	struct i40e_ddp_version ver = pkg_hdr->version;

	netdev_err(netdev, "Unsupported DDP profile version %u.%u.%u.%u",
	ver.major, ver.minor, ver.update, ver.draft);
	return false;
	}
	if (size_huge > size) {
	netdev_err(netdev, "Invalid DDP profile - size is bigger than 4G");
	return false;
	}
	if (size < (sizeof(struct i40e_package_header) +
	sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
	netdev_err(netdev, "Invalid DDP profile - size is too small.");
	return false;
	}

	pkg_hdr_size = sizeof(u32) * (pkg_hdr->segment_count + 2U);
	if (size < pkg_hdr_size) {
	netdev_err(netdev, "Invalid DDP profile - too many segments");
	return false;
	}
	for (segment = 0; segment < pkg_hdr->segment_count; ++segment) {
	u32 offset = pkg_hdr->segment_offset[segment];

	if (0xFU & offset) {
	netdev_err(netdev,
	"Invalid DDP profile %u segment alignment",
	segment);
	return false;
	}
	if (pkg_hdr_size > offset \|\| offset >= size) {
	netdev_err(netdev,
	"Invalid DDP profile %u segment offset",
	segment);
	return false;
	}
	}

	return true;
	}

	/**
	* i40e_ddp_load - performs DDP loading
	* @netdev: net device structure
	* @data: buffer containing recipe file
	* @size: size of the buffer
	* @is_add: true when loading profile, false when rolling back the previous one
	*
	* Checks correctness and loads DDP profile to the NIC. The function is
	* also used for rolling back previously loaded profile.
	**/
	int i40e_ddp_load(struct net_device netdev, const u8 data, size_t size,
	bool is_add)
	{
	u8 profile_info_sec[sizeof(struct i40e_profile_section_header) +
	sizeof(struct i40e_profile_info)];
	struct i40e_metadata_segment *metadata_hdr;
	struct i40e_profile_segment *profile_hdr;
	struct i40e_profile_info pinfo;
	struct i40e_package_header *pkg_hdr;
	i40e_status status;
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	u32 track_id;
	int istatus;

	pkg_hdr = (struct i40e_package_header *)data;
	if (!i40e_ddp_is_pkg_hdr_valid(netdev, pkg_hdr, size))
	return -EINVAL;

	if (size < (sizeof(struct i40e_package_header) +
	sizeof(struct i40e_metadata_segment) + sizeof(u32) * 2)) {
	netdev_err(netdev, "Invalid DDP recipe size.");
	return -EINVAL;
	}

	/* Find beginning of segment data in buffer */
	metadata_hdr = (struct i40e_metadata_segment *)
	i40e_find_segment_in_package(SEGMENT_TYPE_METADATA, pkg_hdr);
	if (!metadata_hdr) {
	netdev_err(netdev, "Failed to find metadata segment in DDP recipe.");
	return -EINVAL;
	}

	track_id = metadata_hdr->track_id;
	profile_hdr = (struct i40e_profile_segment *)
	i40e_find_segment_in_package(SEGMENT_TYPE_I40E, pkg_hdr);
	if (!profile_hdr) {
	netdev_err(netdev, "Failed to find profile segment in DDP recipe.");
	return -EINVAL;
	}

	pinfo.track_id = track_id;
	pinfo.version = profile_hdr->version;
	if (is_add)
	pinfo.op = I40E_DDP_ADD_TRACKID;
	else
	pinfo.op = I40E_DDP_REMOVE_TRACKID;

	memcpy(pinfo.name, profile_hdr->name, I40E_DDP_NAME_SIZE);

	/* Check if profile data already exists*/
	istatus = i40e_ddp_does_profile_exist(&pf->hw, &pinfo);
	if (istatus < 0) {
	netdev_err(netdev, "Failed to fetch loaded profiles.");
	return istatus;
	}
	if (is_add) {
	if (istatus > 0) {
	netdev_err(netdev, "DDP profile already loaded.");
	return -EINVAL;
	}
	istatus = i40e_ddp_does_profile_overlap(&pf->hw, &pinfo);
	if (istatus < 0) {
	netdev_err(netdev, "Failed to fetch loaded profiles.");
	return istatus;
	}
	if (istatus > 0) {
	netdev_err(netdev, "DDP profile overlaps with existing one.");
	return -EINVAL;
	}
	} else {
	if (istatus == 0) {
	netdev_err(netdev,
	"DDP profile for deletion does not exist.");
	return -EINVAL;
	}
	}

	/* Load profile data */
	if (is_add) {
	status = i40e_write_profile(&pf->hw, profile_hdr, track_id);
	if (status) {
	if (status == I40E_ERR_DEVICE_NOT_SUPPORTED) {
	netdev_err(netdev,
	"Profile is not supported by the device.");
	return -EPERM;
	}
	netdev_err(netdev, "Failed to write DDP profile.");
	return -EIO;
	}
	} else {
	status = i40e_rollback_profile(&pf->hw, profile_hdr, track_id);
	if (status) {
	netdev_err(netdev, "Failed to remove DDP profile.");
	return -EIO;
	}
	}

	/* Add/remove profile to/from profile list in FW */
	if (is_add) {
	status = i40e_add_pinfo(&pf->hw, profile_hdr, profile_info_sec,
	track_id);
	if (status) {
	netdev_err(netdev, "Failed to add DDP profile info.");
	return -EIO;
	}
	} else {
	status = i40e_del_pinfo(&pf->hw, profile_hdr, profile_info_sec,
	track_id);
	if (status) {
	netdev_err(netdev, "Failed to restore DDP profile info.");
	return -EIO;
	}
	}

	return 0;
	}

	/**
	* i40e_ddp_restore - restore previously loaded profile and remove from list
	* @pf: PF data struct
	*
	* Restores previously loaded profile stored on the list in driver memory.
	* After rolling back removes entry from the list.
	**/
	static int i40e_ddp_restore(struct i40e_pf *pf)
	{
	struct i40e_ddp_old_profile_list *entry;
	struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev;
	int status = 0;

	if (!list_empty(&pf->ddp_old_prof)) {
	entry = list_first_entry(&pf->ddp_old_prof,
	struct i40e_ddp_old_profile_list,
	list);
	status = i40e_ddp_load(netdev, entry->old_ddp_buf,
	entry->old_ddp_size, false);
	list_del(&entry->list);
	kfree(entry);
	}
	return status;
	}

	/**
	* i40e_ddp_flash - callback function for ethtool flash feature
	* @netdev: net device structure
	* @flash: kernel flash structure
	*
	* Ethtool callback function used for loading and unloading DDP profiles.
	**/
	int i40e_ddp_flash(struct net_device netdev, struct ethtool_flash flash)
	{
	const struct firmware *ddp_config;
	struct i40e_netdev_priv *np = netdev_priv(netdev);
	struct i40e_vsi *vsi = np->vsi;
	struct i40e_pf *pf = vsi->back;
	int status = 0;

	/* Check for valid region first */
	if (flash->region != I40_DDP_FLASH_REGION) {
	netdev_err(netdev, "Requested firmware region is not recognized by this driver.");
	return -EINVAL;
	}
	if (pf->hw.bus.func != 0) {
	netdev_err(netdev, "Any DDP operation is allowed only on Phy0 NIC interface");
	return -EINVAL;
	}

	/* If the user supplied "-" instead of file name rollback previously
	* stored profile.
	*/
	if (strncmp(flash->data, "-", 2) != 0) {
	struct i40e_ddp_old_profile_list *list_entry;
	char profile_name[sizeof(I40E_DDP_PROFILE_PATH)
	+ I40E_DDP_PROFILE_NAME_MAX];

	profile_name[sizeof(profile_name) - 1] = 0;
	strncpy(profile_name, I40E_DDP_PROFILE_PATH,
	sizeof(profile_name) - 1);
	strncat(profile_name, flash->data, I40E_DDP_PROFILE_NAME_MAX);
	/* Load DDP recipe. */
	status = request_firmware(&ddp_config, profile_name,
	&netdev->dev);
	if (status) {
	netdev_err(netdev, "DDP recipe file request failed.");
	return status;
	}

	status = i40e_ddp_load(netdev, ddp_config->data,
	ddp_config->size, true);

	if (!status) {
	list_entry =
	kzalloc(sizeof(struct i40e_ddp_old_profile_list) +
	ddp_config->size, GFP_KERNEL);
	if (!list_entry) {
	netdev_info(netdev, "Failed to allocate memory for previous DDP profile data.");
	netdev_info(netdev, "New profile loaded but roll-back will be impossible.");
	} else {
	memcpy(list_entry->old_ddp_buf,
	ddp_config->data, ddp_config->size);
	list_entry->old_ddp_size = ddp_config->size;
	list_add(&list_entry->list, &pf->ddp_old_prof);
	}
	}

	release_firmware(ddp_config);
	} else {
	if (!list_empty(&pf->ddp_old_prof)) {
	status = i40e_ddp_restore(pf);
	} else {
	netdev_warn(netdev, "There is no DDP profile to restore.");
	status = -ENOENT;
	}
	}
	return status;
	}