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, 466 insertions, 0 deletions

diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c
new file mode 100644
index 000000000..0914e7328
--- /dev/null
+++ b/drivers/fpga/dfl-pci.c
@@ -0,0 +1,466 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for FPGA Device Feature List (DFL) PCIe device
+ *
+ * Copyright (C) 2017-2018 Intel Corporation, Inc.
+ *
+ * Authors:
+ *   Zhang Yi <Yi.Z.Zhang@intel.com>
+ *   Xiao Guangrong <guangrong.xiao@linux.intel.com>
+ *   Joseph Grecco <joe.grecco@intel.com>
+ *   Enno Luebbers <enno.luebbers@intel.com>
+ *   Tim Whisonant <tim.whisonant@intel.com>
+ *   Ananda Ravuri <ananda.ravuri@intel.com>
+ *   Henry Mitchel <henry.mitchel@intel.com>
+ */
+
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/errno.h>
+#include <linux/aer.h>
+
+#include "dfl.h"
+
+#define DRV_VERSION	"0.8"
+#define DRV_NAME	"dfl-pci"
+
+#define PCI_VSEC_ID_INTEL_DFLS 0x43
+
+#define PCI_VNDR_DFLS_CNT 0x8
+#define PCI_VNDR_DFLS_RES 0xc
+
+#define PCI_VNDR_DFLS_RES_BAR_MASK GENMASK(2, 0)
+#define PCI_VNDR_DFLS_RES_OFF_MASK GENMASK(31, 3)
+
+struct cci_drvdata {
+	struct dfl_fpga_cdev *cdev;	/* container device */
+};
+
+static void __iomem *cci_pci_ioremap_bar0(struct pci_dev *pcidev)
+{
+	if (pcim_iomap_regions(pcidev, BIT(0), DRV_NAME))
+		return NULL;
+
+	return pcim_iomap_table(pcidev)[0];
+}
+
+static int cci_pci_alloc_irq(struct pci_dev *pcidev)
+{
+	int ret, nvec = pci_msix_vec_count(pcidev);
+
+	if (nvec <= 0) {
+		dev_dbg(&pcidev->dev, "fpga interrupt not supported\n");
+		return 0;
+	}
+
+	ret = pci_alloc_irq_vectors(pcidev, nvec, nvec, PCI_IRQ_MSIX);
+	if (ret < 0)
+		return ret;
+
+	return nvec;
+}
+
+static void cci_pci_free_irq(struct pci_dev *pcidev)
+{
+	pci_free_irq_vectors(pcidev);
+}
+
+/* PCI Device ID */
+#define PCIE_DEVICE_ID_PF_INT_5_X		0xBCBD
+#define PCIE_DEVICE_ID_PF_INT_6_X		0xBCC0
+#define PCIE_DEVICE_ID_PF_DSC_1_X		0x09C4
+#define PCIE_DEVICE_ID_INTEL_PAC_N3000		0x0B30
+#define PCIE_DEVICE_ID_INTEL_PAC_D5005		0x0B2B
+#define PCIE_DEVICE_ID_SILICOM_PAC_N5010	0x1000
+#define PCIE_DEVICE_ID_SILICOM_PAC_N5011	0x1001
+#define PCIE_DEVICE_ID_INTEL_DFL		0xbcce
+/* PCI Subdevice ID for PCIE_DEVICE_ID_INTEL_DFL */
+#define PCIE_SUBDEVICE_ID_INTEL_N6000		0x1770
+#define PCIE_SUBDEVICE_ID_INTEL_N6001		0x1771
+#define PCIE_SUBDEVICE_ID_INTEL_C6100		0x17d4
+
+/* VF Device */
+#define PCIE_DEVICE_ID_VF_INT_5_X		0xBCBF
+#define PCIE_DEVICE_ID_VF_INT_6_X		0xBCC1
+#define PCIE_DEVICE_ID_VF_DSC_1_X		0x09C5
+#define PCIE_DEVICE_ID_INTEL_PAC_D5005_VF	0x0B2C
+#define PCIE_DEVICE_ID_INTEL_DFL_VF		0xbccf
+
+static struct pci_device_id cci_pcie_id_tbl[] = {
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_PF_INT_5_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_VF_INT_5_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_PF_INT_6_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_VF_INT_6_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_PF_DSC_1_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_VF_DSC_1_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_PAC_N3000),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_PAC_D5005),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_PAC_D5005_VF),},
+	{PCI_DEVICE(PCI_VENDOR_ID_SILICOM_DENMARK, PCIE_DEVICE_ID_SILICOM_PAC_N5010),},
+	{PCI_DEVICE(PCI_VENDOR_ID_SILICOM_DENMARK, PCIE_DEVICE_ID_SILICOM_PAC_N5011),},
+	{PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_DFL,
+			PCI_VENDOR_ID_INTEL, PCIE_SUBDEVICE_ID_INTEL_N6000),},
+	{PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_DFL_VF,
+			PCI_VENDOR_ID_INTEL, PCIE_SUBDEVICE_ID_INTEL_N6000),},
+	{PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_DFL,
+			PCI_VENDOR_ID_INTEL, PCIE_SUBDEVICE_ID_INTEL_N6001),},
+	{PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_DFL_VF,
+			PCI_VENDOR_ID_INTEL, PCIE_SUBDEVICE_ID_INTEL_N6001),},
+	{PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_DFL,
+			PCI_VENDOR_ID_INTEL, PCIE_SUBDEVICE_ID_INTEL_C6100),},
+	{PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_DFL_VF,
+			PCI_VENDOR_ID_INTEL, PCIE_SUBDEVICE_ID_INTEL_C6100),},
+	{0,}
+};
+MODULE_DEVICE_TABLE(pci, cci_pcie_id_tbl);
+
+static int cci_init_drvdata(struct pci_dev *pcidev)
+{
+	struct cci_drvdata *drvdata;
+
+	drvdata = devm_kzalloc(&pcidev->dev, sizeof(*drvdata), GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+
+	pci_set_drvdata(pcidev, drvdata);
+
+	return 0;
+}
+
+static void cci_remove_feature_devs(struct pci_dev *pcidev)
+{
+	struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
+
+	/* remove all children feature devices */
+	dfl_fpga_feature_devs_remove(drvdata->cdev);
+	cci_pci_free_irq(pcidev);
+}
+
+static int *cci_pci_create_irq_table(struct pci_dev *pcidev, unsigned int nvec)
+{
+	unsigned int i;
+	int *table;
+
+	table = kcalloc(nvec, sizeof(int), GFP_KERNEL);
+	if (!table)
+		return table;
+
+	for (i = 0; i < nvec; i++)
+		table[i] = pci_irq_vector(pcidev, i);
+
+	return table;
+}
+
+static int find_dfls_by_vsec(struct pci_dev *pcidev, struct dfl_fpga_enum_info *info)
+{
+	u32 bir, offset, vndr_hdr, dfl_cnt, dfl_res;
+	int dfl_res_off, i, bars, voff = 0;
+	resource_size_t start, len;
+
+	while ((voff = pci_find_next_ext_capability(pcidev, voff, PCI_EXT_CAP_ID_VNDR))) {
+		vndr_hdr = 0;
+		pci_read_config_dword(pcidev, voff + PCI_VNDR_HEADER, &vndr_hdr);
+
+		if (PCI_VNDR_HEADER_ID(vndr_hdr) == PCI_VSEC_ID_INTEL_DFLS &&
+		    pcidev->vendor == PCI_VENDOR_ID_INTEL)
+			break;
+	}
+
+	if (!voff) {
+		dev_dbg(&pcidev->dev, "%s no DFL VSEC found\n", __func__);
+		return -ENODEV;
+	}
+
+	dfl_cnt = 0;
+	pci_read_config_dword(pcidev, voff + PCI_VNDR_DFLS_CNT, &dfl_cnt);
+	if (dfl_cnt > PCI_STD_NUM_BARS) {
+		dev_err(&pcidev->dev, "%s too many DFLs %d > %d\n",
+			__func__, dfl_cnt, PCI_STD_NUM_BARS);
+		return -EINVAL;
+	}
+
+	dfl_res_off = voff + PCI_VNDR_DFLS_RES;
+	if (dfl_res_off + (dfl_cnt * sizeof(u32)) > PCI_CFG_SPACE_EXP_SIZE) {
+		dev_err(&pcidev->dev, "%s DFL VSEC too big for PCIe config space\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	for (i = 0, bars = 0; i < dfl_cnt; i++, dfl_res_off += sizeof(u32)) {
+		dfl_res = GENMASK(31, 0);
+		pci_read_config_dword(pcidev, dfl_res_off, &dfl_res);
+
+		bir = dfl_res & PCI_VNDR_DFLS_RES_BAR_MASK;
+		if (bir >= PCI_STD_NUM_BARS) {
+			dev_err(&pcidev->dev, "%s bad bir number %d\n",
+				__func__, bir);
+			return -EINVAL;
+		}
+
+		if (bars & BIT(bir)) {
+			dev_err(&pcidev->dev, "%s DFL for BAR %d already specified\n",
+				__func__, bir);
+			return -EINVAL;
+		}
+
+		bars |= BIT(bir);
+
+		len = pci_resource_len(pcidev, bir);
+		offset = dfl_res & PCI_VNDR_DFLS_RES_OFF_MASK;
+		if (offset >= len) {
+			dev_err(&pcidev->dev, "%s bad offset %u >= %pa\n",
+				__func__, offset, &len);
+			return -EINVAL;
+		}
+
+		dev_dbg(&pcidev->dev, "%s BAR %d offset 0x%x\n", __func__, bir, offset);
+
+		len -= offset;
+
+		start = pci_resource_start(pcidev, bir) + offset;
+
+		dfl_fpga_enum_info_add_dfl(info, start, len);
+	}
+
+	return 0;
+}
+
+/* default method of finding dfls starting at offset 0 of bar 0 */
+static int find_dfls_by_default(struct pci_dev *pcidev,
+				struct dfl_fpga_enum_info *info)
+{
+	int port_num, bar, i, ret = 0;
+	resource_size_t start, len;
+	void __iomem *base;
+	u32 offset;
+	u64 v;
+
+	/* start to find Device Feature List from Bar 0 */
+	base = cci_pci_ioremap_bar0(pcidev);
+	if (!base)
+		return -ENOMEM;
+
+	/*
+	 * PF device has FME and Ports/AFUs, and VF device only has one
+	 * Port/AFU. Check them and add related "Device Feature List" info
+	 * for the next step enumeration.
+	 */
+	if (dfl_feature_is_fme(base)) {
+		start = pci_resource_start(pcidev, 0);
+		len = pci_resource_len(pcidev, 0);
+
+		dfl_fpga_enum_info_add_dfl(info, start, len);
+
+		/*
+		 * find more Device Feature Lists (e.g. Ports) per information
+		 * indicated by FME module.
+		 */
+		v = readq(base + FME_HDR_CAP);
+		port_num = FIELD_GET(FME_CAP_NUM_PORTS, v);
+
+		WARN_ON(port_num > MAX_DFL_FPGA_PORT_NUM);
+
+		for (i = 0; i < port_num; i++) {
+			v = readq(base + FME_HDR_PORT_OFST(i));
+
+			/* skip ports which are not implemented. */
+			if (!(v & FME_PORT_OFST_IMP))
+				continue;
+
+			/*
+			 * add Port's Device Feature List information for next
+			 * step enumeration.
+			 */
+			bar = FIELD_GET(FME_PORT_OFST_BAR_ID, v);
+			offset = FIELD_GET(FME_PORT_OFST_DFH_OFST, v);
+			if (bar == FME_PORT_OFST_BAR_SKIP) {
+				continue;
+			} else if (bar >= PCI_STD_NUM_BARS) {
+				dev_err(&pcidev->dev, "bad BAR %d for port %d\n",
+					bar, i);
+				ret = -EINVAL;
+				break;
+			}
+
+			start = pci_resource_start(pcidev, bar) + offset;
+			len = pci_resource_len(pcidev, bar) - offset;
+
+			dfl_fpga_enum_info_add_dfl(info, start, len);
+		}
+	} else if (dfl_feature_is_port(base)) {
+		start = pci_resource_start(pcidev, 0);
+		len = pci_resource_len(pcidev, 0);
+
+		dfl_fpga_enum_info_add_dfl(info, start, len);
+	} else {
+		ret = -ENODEV;
+	}
+
+	/* release I/O mappings for next step enumeration */
+	pcim_iounmap_regions(pcidev, BIT(0));
+
+	return ret;
+}
+
+/* enumerate feature devices under pci device */
+static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
+{
+	struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
+	struct dfl_fpga_enum_info *info;
+	struct dfl_fpga_cdev *cdev;
+	int nvec, ret = 0;
+	int *irq_table;
+
+	/* allocate enumeration info via pci_dev */
+	info = dfl_fpga_enum_info_alloc(&pcidev->dev);
+	if (!info)
+		return -ENOMEM;
+
+	/* add irq info for enumeration if the device support irq */
+	nvec = cci_pci_alloc_irq(pcidev);
+	if (nvec < 0) {
+		dev_err(&pcidev->dev, "Fail to alloc irq %d.\n", nvec);
+		ret = nvec;
+		goto enum_info_free_exit;
+	} else if (nvec) {
+		irq_table = cci_pci_create_irq_table(pcidev, nvec);
+		if (!irq_table) {
+			ret = -ENOMEM;
+			goto irq_free_exit;
+		}
+
+		ret = dfl_fpga_enum_info_add_irq(info, nvec, irq_table);
+		kfree(irq_table);
+		if (ret)
+			goto irq_free_exit;
+	}
+
+	ret = find_dfls_by_vsec(pcidev, info);
+	if (ret == -ENODEV)
+		ret = find_dfls_by_default(pcidev, info);
+
+	if (ret)
+		goto irq_free_exit;
+
+	/* start enumeration with prepared enumeration information */
+	cdev = dfl_fpga_feature_devs_enumerate(info);
+	if (IS_ERR(cdev)) {
+		dev_err(&pcidev->dev, "Enumeration failure\n");
+		ret = PTR_ERR(cdev);
+		goto irq_free_exit;
+	}
+
+	drvdata->cdev = cdev;
+
+irq_free_exit:
+	if (ret)
+		cci_pci_free_irq(pcidev);
+enum_info_free_exit:
+	dfl_fpga_enum_info_free(info);
+
+	return ret;
+}
+
+static
+int cci_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *pcidevid)
+{
+	int ret;
+
+	ret = pcim_enable_device(pcidev);
+	if (ret < 0) {
+		dev_err(&pcidev->dev, "Failed to enable device %d.\n", ret);
+		return ret;
+	}
+
+	ret = pci_enable_pcie_error_reporting(pcidev);
+	if (ret && ret != -EINVAL)
+		dev_info(&pcidev->dev, "PCIE AER unavailable %d.\n", ret);
+
+	pci_set_master(pcidev);
+
+	ret = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(64));
+	if (ret)
+		ret = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(&pcidev->dev, "No suitable DMA support available.\n");
+		goto disable_error_report_exit;
+	}
+
+	ret = cci_init_drvdata(pcidev);
+	if (ret) {
+		dev_err(&pcidev->dev, "Fail to init drvdata %d.\n", ret);
+		goto disable_error_report_exit;
+	}
+
+	ret = cci_enumerate_feature_devs(pcidev);
+	if (!ret)
+		return ret;
+
+	dev_err(&pcidev->dev, "enumeration failure %d.\n", ret);
+
+disable_error_report_exit:
+	pci_disable_pcie_error_reporting(pcidev);
+	return ret;
+}
+
+static int cci_pci_sriov_configure(struct pci_dev *pcidev, int num_vfs)
+{
+	struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
+	struct dfl_fpga_cdev *cdev = drvdata->cdev;
+
+	if (!num_vfs) {
+		/*
+		 * disable SRIOV and then put released ports back to default
+		 * PF access mode.
+		 */
+		pci_disable_sriov(pcidev);
+
+		dfl_fpga_cdev_config_ports_pf(cdev);
+
+	} else {
+		int ret;
+
+		/*
+		 * before enable SRIOV, put released ports into VF access mode
+		 * first of all.
+		 */
+		ret = dfl_fpga_cdev_config_ports_vf(cdev, num_vfs);
+		if (ret)
+			return ret;
+
+		ret = pci_enable_sriov(pcidev, num_vfs);
+		if (ret) {
+			dfl_fpga_cdev_config_ports_pf(cdev);
+			return ret;
+		}
+	}
+
+	return num_vfs;
+}
+
+static void cci_pci_remove(struct pci_dev *pcidev)
+{
+	if (dev_is_pf(&pcidev->dev))
+		cci_pci_sriov_configure(pcidev, 0);
+
+	cci_remove_feature_devs(pcidev);
+	pci_disable_pcie_error_reporting(pcidev);
+}
+
+static struct pci_driver cci_pci_driver = {
+	.name = DRV_NAME,
+	.id_table = cci_pcie_id_tbl,
+	.probe = cci_pci_probe,
+	.remove = cci_pci_remove,
+	.sriov_configure = cci_pci_sriov_configure,
+};
+
+module_pci_driver(cci_pci_driver);
+
+MODULE_DESCRIPTION("FPGA DFL PCIe Device Driver");
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL v2");