Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 481 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ddp.c b/drivers/net/ethernet/intel/i40e/i40e_ddp.c
new file mode 100644
index 000000000..7e8183762
--- /dev/null
+++ b/drivers/net/ethernet/intel/i40e/i40e_ddp.c
@@ -0,0 +1,481 @@
+// 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];
+	int 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];
+	int 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 int
+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;
+	u32 offset = 0, info = 0;
+	int status;
+
+	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 int
+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;
+	u32 offset = 0, info = 0;
+	int status;
+
+	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;
+	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;
+	int status;
+
+	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;
+}