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, 379 insertions, 0 deletions

diff --git a/drivers/acpi/viot.c b/drivers/acpi/viot.c
new file mode 100644
index 000000000..ed752cbbe
--- /dev/null
+++ b/drivers/acpi/viot.c
@@ -0,0 +1,379 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Virtual I/O topology
+ *
+ * The Virtual I/O Translation Table (VIOT) describes the topology of
+ * para-virtual IOMMUs and the endpoints they manage. The OS uses it to
+ * initialize devices in the right order, preventing endpoints from issuing DMA
+ * before their IOMMU is ready.
+ *
+ * When binding a driver to a device, before calling the device driver's probe()
+ * method, the driver infrastructure calls dma_configure(). At that point the
+ * VIOT driver looks for an IOMMU associated to the device in the VIOT table.
+ * If an IOMMU exists and has been initialized, the VIOT driver initializes the
+ * device's IOMMU fwspec, allowing the DMA infrastructure to invoke the IOMMU
+ * ops when the device driver configures DMA mappings. If an IOMMU exists and
+ * hasn't yet been initialized, VIOT returns -EPROBE_DEFER to postpone probing
+ * the device until the IOMMU is available.
+ */
+#define pr_fmt(fmt) "ACPI: VIOT: " fmt
+
+#include <linux/acpi_viot.h>
+#include <linux/fwnode.h>
+#include <linux/iommu.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+
+struct viot_iommu {
+	/* Node offset within the table */
+	unsigned int			offset;
+	struct fwnode_handle		*fwnode;
+	struct list_head		list;
+};
+
+struct viot_endpoint {
+	union {
+		/* PCI range */
+		struct {
+			u16		segment_start;
+			u16		segment_end;
+			u16		bdf_start;
+			u16		bdf_end;
+		};
+		/* MMIO */
+		u64			address;
+	};
+	u32				endpoint_id;
+	struct viot_iommu		*viommu;
+	struct list_head		list;
+};
+
+static struct acpi_table_viot *viot;
+static LIST_HEAD(viot_iommus);
+static LIST_HEAD(viot_pci_ranges);
+static LIST_HEAD(viot_mmio_endpoints);
+
+static int __init viot_check_bounds(const struct acpi_viot_header *hdr)
+{
+	struct acpi_viot_header *start, *end, *hdr_end;
+
+	start = ACPI_ADD_PTR(struct acpi_viot_header, viot,
+			     max_t(size_t, sizeof(*viot), viot->node_offset));
+	end = ACPI_ADD_PTR(struct acpi_viot_header, viot, viot->header.length);
+	hdr_end = ACPI_ADD_PTR(struct acpi_viot_header, hdr, sizeof(*hdr));
+
+	if (hdr < start || hdr_end > end) {
+		pr_err(FW_BUG "Node pointer overflows\n");
+		return -EOVERFLOW;
+	}
+	if (hdr->length < sizeof(*hdr)) {
+		pr_err(FW_BUG "Empty node\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int __init viot_get_pci_iommu_fwnode(struct viot_iommu *viommu,
+					    u16 segment, u16 bdf)
+{
+	struct pci_dev *pdev;
+	struct fwnode_handle *fwnode;
+
+	pdev = pci_get_domain_bus_and_slot(segment, PCI_BUS_NUM(bdf),
+					   bdf & 0xff);
+	if (!pdev) {
+		pr_err("Could not find PCI IOMMU\n");
+		return -ENODEV;
+	}
+
+	fwnode = dev_fwnode(&pdev->dev);
+	if (!fwnode) {
+		/*
+		 * PCI devices aren't necessarily described by ACPI. Create a
+		 * fwnode so the IOMMU subsystem can identify this device.
+		 */
+		fwnode = acpi_alloc_fwnode_static();
+		if (!fwnode) {
+			pci_dev_put(pdev);
+			return -ENOMEM;
+		}
+		set_primary_fwnode(&pdev->dev, fwnode);
+	}
+	viommu->fwnode = dev_fwnode(&pdev->dev);
+	pci_dev_put(pdev);
+	return 0;
+}
+
+static int __init viot_get_mmio_iommu_fwnode(struct viot_iommu *viommu,
+					     u64 address)
+{
+	struct acpi_device *adev;
+	struct resource res = {
+		.start	= address,
+		.end	= address,
+		.flags	= IORESOURCE_MEM,
+	};
+
+	adev = acpi_resource_consumer(&res);
+	if (!adev) {
+		pr_err("Could not find MMIO IOMMU\n");
+		return -EINVAL;
+	}
+	viommu->fwnode = &adev->fwnode;
+	return 0;
+}
+
+static struct viot_iommu * __init viot_get_iommu(unsigned int offset)
+{
+	int ret;
+	struct viot_iommu *viommu;
+	struct acpi_viot_header *hdr = ACPI_ADD_PTR(struct acpi_viot_header,
+						    viot, offset);
+	union {
+		struct acpi_viot_virtio_iommu_pci pci;
+		struct acpi_viot_virtio_iommu_mmio mmio;
+	} *node = (void *)hdr;
+
+	list_for_each_entry(viommu, &viot_iommus, list)
+		if (viommu->offset == offset)
+			return viommu;
+
+	if (viot_check_bounds(hdr))
+		return NULL;
+
+	viommu = kzalloc(sizeof(*viommu), GFP_KERNEL);
+	if (!viommu)
+		return NULL;
+
+	viommu->offset = offset;
+	switch (hdr->type) {
+	case ACPI_VIOT_NODE_VIRTIO_IOMMU_PCI:
+		if (hdr->length < sizeof(node->pci))
+			goto err_free;
+
+		ret = viot_get_pci_iommu_fwnode(viommu, node->pci.segment,
+						node->pci.bdf);
+		break;
+	case ACPI_VIOT_NODE_VIRTIO_IOMMU_MMIO:
+		if (hdr->length < sizeof(node->mmio))
+			goto err_free;
+
+		ret = viot_get_mmio_iommu_fwnode(viommu,
+						 node->mmio.base_address);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	if (ret)
+		goto err_free;
+
+	list_add(&viommu->list, &viot_iommus);
+	return viommu;
+
+err_free:
+	kfree(viommu);
+	return NULL;
+}
+
+static int __init viot_parse_node(const struct acpi_viot_header *hdr)
+{
+	int ret = -EINVAL;
+	struct list_head *list;
+	struct viot_endpoint *ep;
+	union {
+		struct acpi_viot_mmio mmio;
+		struct acpi_viot_pci_range pci;
+	} *node = (void *)hdr;
+
+	if (viot_check_bounds(hdr))
+		return -EINVAL;
+
+	if (hdr->type == ACPI_VIOT_NODE_VIRTIO_IOMMU_PCI ||
+	    hdr->type == ACPI_VIOT_NODE_VIRTIO_IOMMU_MMIO)
+		return 0;
+
+	ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+	if (!ep)
+		return -ENOMEM;
+
+	switch (hdr->type) {
+	case ACPI_VIOT_NODE_PCI_RANGE:
+		if (hdr->length < sizeof(node->pci)) {
+			pr_err(FW_BUG "Invalid PCI node size\n");
+			goto err_free;
+		}
+
+		ep->segment_start = node->pci.segment_start;
+		ep->segment_end = node->pci.segment_end;
+		ep->bdf_start = node->pci.bdf_start;
+		ep->bdf_end = node->pci.bdf_end;
+		ep->endpoint_id = node->pci.endpoint_start;
+		ep->viommu = viot_get_iommu(node->pci.output_node);
+		list = &viot_pci_ranges;
+		break;
+	case ACPI_VIOT_NODE_MMIO:
+		if (hdr->length < sizeof(node->mmio)) {
+			pr_err(FW_BUG "Invalid MMIO node size\n");
+			goto err_free;
+		}
+
+		ep->address = node->mmio.base_address;
+		ep->endpoint_id = node->mmio.endpoint;
+		ep->viommu = viot_get_iommu(node->mmio.output_node);
+		list = &viot_mmio_endpoints;
+		break;
+	default:
+		pr_warn("Unsupported node %x\n", hdr->type);
+		ret = 0;
+		goto err_free;
+	}
+
+	if (!ep->viommu) {
+		pr_warn("No IOMMU node found\n");
+		/*
+		 * A future version of the table may use the node for other
+		 * purposes. Keep parsing.
+		 */
+		ret = 0;
+		goto err_free;
+	}
+
+	list_add(&ep->list, list);
+	return 0;
+
+err_free:
+	kfree(ep);
+	return ret;
+}
+
+/**
+ * acpi_viot_early_init - Test the presence of VIOT and enable ACS
+ *
+ * If the VIOT does exist, ACS must be enabled. This cannot be
+ * done in acpi_viot_init() which is called after the bus scan
+ */
+void __init acpi_viot_early_init(void)
+{
+#ifdef CONFIG_PCI
+	acpi_status status;
+	struct acpi_table_header *hdr;
+
+	status = acpi_get_table(ACPI_SIG_VIOT, 0, &hdr);
+	if (ACPI_FAILURE(status))
+		return;
+	pci_request_acs();
+	acpi_put_table(hdr);
+#endif
+}
+
+/**
+ * acpi_viot_init - Parse the VIOT table
+ *
+ * Parse the VIOT table, prepare the list of endpoints to be used during DMA
+ * setup of devices.
+ */
+void __init acpi_viot_init(void)
+{
+	int i;
+	acpi_status status;
+	struct acpi_table_header *hdr;
+	struct acpi_viot_header *node;
+
+	status = acpi_get_table(ACPI_SIG_VIOT, 0, &hdr);
+	if (ACPI_FAILURE(status)) {
+		if (status != AE_NOT_FOUND) {
+			const char *msg = acpi_format_exception(status);
+
+			pr_err("Failed to get table, %s\n", msg);
+		}
+		return;
+	}
+
+	viot = (void *)hdr;
+
+	node = ACPI_ADD_PTR(struct acpi_viot_header, viot, viot->node_offset);
+	for (i = 0; i < viot->node_count; i++) {
+		if (viot_parse_node(node))
+			return;
+
+		node = ACPI_ADD_PTR(struct acpi_viot_header, node,
+				    node->length);
+	}
+
+	acpi_put_table(hdr);
+}
+
+static int viot_dev_iommu_init(struct device *dev, struct viot_iommu *viommu,
+			       u32 epid)
+{
+	const struct iommu_ops *ops;
+
+	if (!viommu)
+		return -ENODEV;
+
+	/* We're not translating ourself */
+	if (device_match_fwnode(dev, viommu->fwnode))
+		return -EINVAL;
+
+	ops = iommu_ops_from_fwnode(viommu->fwnode);
+	if (!ops)
+		return IS_ENABLED(CONFIG_VIRTIO_IOMMU) ?
+			-EPROBE_DEFER : -ENODEV;
+
+	return acpi_iommu_fwspec_init(dev, epid, viommu->fwnode, ops);
+}
+
+static int viot_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void *data)
+{
+	u32 epid;
+	struct viot_endpoint *ep;
+	u32 domain_nr = pci_domain_nr(pdev->bus);
+
+	list_for_each_entry(ep, &viot_pci_ranges, list) {
+		if (domain_nr >= ep->segment_start &&
+		    domain_nr <= ep->segment_end &&
+		    dev_id >= ep->bdf_start &&
+		    dev_id <= ep->bdf_end) {
+			epid = ((domain_nr - ep->segment_start) << 16) +
+				dev_id - ep->bdf_start + ep->endpoint_id;
+
+			return viot_dev_iommu_init(&pdev->dev, ep->viommu,
+						   epid);
+		}
+	}
+	return -ENODEV;
+}
+
+static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
+{
+	struct resource *mem;
+	struct viot_endpoint *ep;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem)
+		return -ENODEV;
+
+	list_for_each_entry(ep, &viot_mmio_endpoints, list) {
+		if (ep->address == mem->start)
+			return viot_dev_iommu_init(&pdev->dev, ep->viommu,
+						   ep->endpoint_id);
+	}
+	return -ENODEV;
+}
+
+/**
+ * viot_iommu_configure - Setup IOMMU ops for an endpoint described by VIOT
+ * @dev: the endpoint
+ *
+ * Return: 0 on success, <0 on failure
+ */
+int viot_iommu_configure(struct device *dev)
+{
+	if (dev_is_pci(dev))
+		return pci_for_each_dma_alias(to_pci_dev(dev),
+					      viot_pci_dev_iommu_init, NULL);
+	else if (dev_is_platform(dev))
+		return viot_mmio_dev_iommu_init(to_platform_device(dev));
+	return -ENODEV;
+}