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, 371 insertions, 0 deletions

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
new file mode 100644
index 000000000..ed53279d1
--- /dev/null
+++ b/drivers/iommu/tegra-gart.c
@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IOMMU API for Graphics Address Relocation Table on Tegra20
+ *
+ * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author: Hiroshi DOYU <hdoyu@nvidia.com>
+ */
+
+#define dev_fmt(fmt)	"gart: " fmt
+
+#include <linux/io.h>
+#include <linux/iommu.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/vmalloc.h>
+
+#include <soc/tegra/mc.h>
+
+#define GART_REG_BASE		0x24
+#define GART_CONFIG		(0x24 - GART_REG_BASE)
+#define GART_ENTRY_ADDR		(0x28 - GART_REG_BASE)
+#define GART_ENTRY_DATA		(0x2c - GART_REG_BASE)
+
+#define GART_ENTRY_PHYS_ADDR_VALID	BIT(31)
+
+#define GART_PAGE_SHIFT		12
+#define GART_PAGE_SIZE		(1 << GART_PAGE_SHIFT)
+#define GART_PAGE_MASK		GENMASK(30, GART_PAGE_SHIFT)
+
+/* bitmap of the page sizes currently supported */
+#define GART_IOMMU_PGSIZES	(GART_PAGE_SIZE)
+
+struct gart_device {
+	void __iomem		*regs;
+	u32			*savedata;
+	unsigned long		iovmm_base;	/* offset to vmm_area start */
+	unsigned long		iovmm_end;	/* offset to vmm_area end */
+	spinlock_t		pte_lock;	/* for pagetable */
+	spinlock_t		dom_lock;	/* for active domain */
+	unsigned int		active_devices;	/* number of active devices */
+	struct iommu_domain	*active_domain;	/* current active domain */
+	struct iommu_device	iommu;		/* IOMMU Core handle */
+	struct device		*dev;
+};
+
+static struct gart_device *gart_handle; /* unique for a system */
+
+static bool gart_debug;
+
+/*
+ * Any interaction between any block on PPSB and a block on APB or AHB
+ * must have these read-back to ensure the APB/AHB bus transaction is
+ * complete before initiating activity on the PPSB block.
+ */
+#define FLUSH_GART_REGS(gart)	readl_relaxed((gart)->regs + GART_CONFIG)
+
+#define for_each_gart_pte(gart, iova)					\
+	for (iova = gart->iovmm_base;					\
+	     iova < gart->iovmm_end;					\
+	     iova += GART_PAGE_SIZE)
+
+static inline void gart_set_pte(struct gart_device *gart,
+				unsigned long iova, unsigned long pte)
+{
+	writel_relaxed(iova, gart->regs + GART_ENTRY_ADDR);
+	writel_relaxed(pte, gart->regs + GART_ENTRY_DATA);
+}
+
+static inline unsigned long gart_read_pte(struct gart_device *gart,
+					  unsigned long iova)
+{
+	unsigned long pte;
+
+	writel_relaxed(iova, gart->regs + GART_ENTRY_ADDR);
+	pte = readl_relaxed(gart->regs + GART_ENTRY_DATA);
+
+	return pte;
+}
+
+static void do_gart_setup(struct gart_device *gart, const u32 *data)
+{
+	unsigned long iova;
+
+	for_each_gart_pte(gart, iova)
+		gart_set_pte(gart, iova, data ? *(data++) : 0);
+
+	writel_relaxed(1, gart->regs + GART_CONFIG);
+	FLUSH_GART_REGS(gart);
+}
+
+static inline bool gart_iova_range_invalid(struct gart_device *gart,
+					   unsigned long iova, size_t bytes)
+{
+	return unlikely(iova < gart->iovmm_base || bytes != GART_PAGE_SIZE ||
+			iova + bytes > gart->iovmm_end);
+}
+
+static inline bool gart_pte_valid(struct gart_device *gart, unsigned long iova)
+{
+	return !!(gart_read_pte(gart, iova) & GART_ENTRY_PHYS_ADDR_VALID);
+}
+
+static int gart_iommu_attach_dev(struct iommu_domain *domain,
+				 struct device *dev)
+{
+	struct gart_device *gart = gart_handle;
+	int ret = 0;
+
+	spin_lock(&gart->dom_lock);
+
+	if (gart->active_domain && gart->active_domain != domain) {
+		ret = -EINVAL;
+	} else if (dev_iommu_priv_get(dev) != domain) {
+		dev_iommu_priv_set(dev, domain);
+		gart->active_domain = domain;
+		gart->active_devices++;
+	}
+
+	spin_unlock(&gart->dom_lock);
+
+	return ret;
+}
+
+static void gart_iommu_detach_dev(struct iommu_domain *domain,
+				  struct device *dev)
+{
+	struct gart_device *gart = gart_handle;
+
+	spin_lock(&gart->dom_lock);
+
+	if (dev_iommu_priv_get(dev) == domain) {
+		dev_iommu_priv_set(dev, NULL);
+
+		if (--gart->active_devices == 0)
+			gart->active_domain = NULL;
+	}
+
+	spin_unlock(&gart->dom_lock);
+}
+
+static struct iommu_domain *gart_iommu_domain_alloc(unsigned type)
+{
+	struct iommu_domain *domain;
+
+	if (type != IOMMU_DOMAIN_UNMANAGED)
+		return NULL;
+
+	domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+	if (domain) {
+		domain->geometry.aperture_start = gart_handle->iovmm_base;
+		domain->geometry.aperture_end = gart_handle->iovmm_end - 1;
+		domain->geometry.force_aperture = true;
+	}
+
+	return domain;
+}
+
+static void gart_iommu_domain_free(struct iommu_domain *domain)
+{
+	WARN_ON(gart_handle->active_domain == domain);
+	kfree(domain);
+}
+
+static inline int __gart_iommu_map(struct gart_device *gart, unsigned long iova,
+				   unsigned long pa)
+{
+	if (unlikely(gart_debug && gart_pte_valid(gart, iova))) {
+		dev_err(gart->dev, "Page entry is in-use\n");
+		return -EINVAL;
+	}
+
+	gart_set_pte(gart, iova, GART_ENTRY_PHYS_ADDR_VALID | pa);
+
+	return 0;
+}
+
+static int gart_iommu_map(struct iommu_domain *domain, unsigned long iova,
+			  phys_addr_t pa, size_t bytes, int prot, gfp_t gfp)
+{
+	struct gart_device *gart = gart_handle;
+	int ret;
+
+	if (gart_iova_range_invalid(gart, iova, bytes))
+		return -EINVAL;
+
+	spin_lock(&gart->pte_lock);
+	ret = __gart_iommu_map(gart, iova, (unsigned long)pa);
+	spin_unlock(&gart->pte_lock);
+
+	return ret;
+}
+
+static inline int __gart_iommu_unmap(struct gart_device *gart,
+				     unsigned long iova)
+{
+	if (unlikely(gart_debug && !gart_pte_valid(gart, iova))) {
+		dev_err(gart->dev, "Page entry is invalid\n");
+		return -EINVAL;
+	}
+
+	gart_set_pte(gart, iova, 0);
+
+	return 0;
+}
+
+static size_t gart_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
+			       size_t bytes, struct iommu_iotlb_gather *gather)
+{
+	struct gart_device *gart = gart_handle;
+	int err;
+
+	if (gart_iova_range_invalid(gart, iova, bytes))
+		return 0;
+
+	spin_lock(&gart->pte_lock);
+	err = __gart_iommu_unmap(gart, iova);
+	spin_unlock(&gart->pte_lock);
+
+	return err ? 0 : bytes;
+}
+
+static phys_addr_t gart_iommu_iova_to_phys(struct iommu_domain *domain,
+					   dma_addr_t iova)
+{
+	struct gart_device *gart = gart_handle;
+	unsigned long pte;
+
+	if (gart_iova_range_invalid(gart, iova, GART_PAGE_SIZE))
+		return -EINVAL;
+
+	spin_lock(&gart->pte_lock);
+	pte = gart_read_pte(gart, iova);
+	spin_unlock(&gart->pte_lock);
+
+	return pte & GART_PAGE_MASK;
+}
+
+static struct iommu_device *gart_iommu_probe_device(struct device *dev)
+{
+	if (!dev_iommu_fwspec_get(dev))
+		return ERR_PTR(-ENODEV);
+
+	return &gart_handle->iommu;
+}
+
+static int gart_iommu_of_xlate(struct device *dev,
+			       struct of_phandle_args *args)
+{
+	return 0;
+}
+
+static void gart_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
+				size_t size)
+{
+	FLUSH_GART_REGS(gart_handle);
+}
+
+static void gart_iommu_sync(struct iommu_domain *domain,
+			    struct iommu_iotlb_gather *gather)
+{
+	size_t length = gather->end - gather->start + 1;
+
+	gart_iommu_sync_map(domain, gather->start, length);
+}
+
+static const struct iommu_ops gart_iommu_ops = {
+	.domain_alloc	= gart_iommu_domain_alloc,
+	.probe_device	= gart_iommu_probe_device,
+	.device_group	= generic_device_group,
+	.pgsize_bitmap	= GART_IOMMU_PGSIZES,
+	.of_xlate	= gart_iommu_of_xlate,
+	.default_domain_ops = &(const struct iommu_domain_ops) {
+		.attach_dev	= gart_iommu_attach_dev,
+		.detach_dev	= gart_iommu_detach_dev,
+		.map		= gart_iommu_map,
+		.unmap		= gart_iommu_unmap,
+		.iova_to_phys	= gart_iommu_iova_to_phys,
+		.iotlb_sync_map	= gart_iommu_sync_map,
+		.iotlb_sync	= gart_iommu_sync,
+		.free		= gart_iommu_domain_free,
+	}
+};
+
+int tegra_gart_suspend(struct gart_device *gart)
+{
+	u32 *data = gart->savedata;
+	unsigned long iova;
+
+	/*
+	 * All GART users shall be suspended at this point. Disable
+	 * address translation to trap all GART accesses as invalid
+	 * memory accesses.
+	 */
+	writel_relaxed(0, gart->regs + GART_CONFIG);
+	FLUSH_GART_REGS(gart);
+
+	for_each_gart_pte(gart, iova)
+		*(data++) = gart_read_pte(gart, iova);
+
+	return 0;
+}
+
+int tegra_gart_resume(struct gart_device *gart)
+{
+	do_gart_setup(gart, gart->savedata);
+
+	return 0;
+}
+
+struct gart_device *tegra_gart_probe(struct device *dev, struct tegra_mc *mc)
+{
+	struct gart_device *gart;
+	struct resource *res;
+	int err;
+
+	BUILD_BUG_ON(PAGE_SHIFT != GART_PAGE_SHIFT);
+
+	/* the GART memory aperture is required */
+	res = platform_get_resource(to_platform_device(dev), IORESOURCE_MEM, 1);
+	if (!res) {
+		dev_err(dev, "Memory aperture resource unavailable\n");
+		return ERR_PTR(-ENXIO);
+	}
+
+	gart = kzalloc(sizeof(*gart), GFP_KERNEL);
+	if (!gart)
+		return ERR_PTR(-ENOMEM);
+
+	gart_handle = gart;
+
+	gart->dev = dev;
+	gart->regs = mc->regs + GART_REG_BASE;
+	gart->iovmm_base = res->start;
+	gart->iovmm_end = res->end + 1;
+	spin_lock_init(&gart->pte_lock);
+	spin_lock_init(&gart->dom_lock);
+
+	do_gart_setup(gart, NULL);
+
+	err = iommu_device_sysfs_add(&gart->iommu, dev, NULL, "gart");
+	if (err)
+		goto free_gart;
+
+	err = iommu_device_register(&gart->iommu, &gart_iommu_ops, dev);
+	if (err)
+		goto remove_sysfs;
+
+	gart->savedata = vmalloc(resource_size(res) / GART_PAGE_SIZE *
+				 sizeof(u32));
+	if (!gart->savedata) {
+		err = -ENOMEM;
+		goto unregister_iommu;
+	}
+
+	return gart;
+
+unregister_iommu:
+	iommu_device_unregister(&gart->iommu);
+remove_sysfs:
+	iommu_device_sysfs_remove(&gart->iommu);
+free_gart:
+	kfree(gart);
+
+	return ERR_PTR(err);
+}
+
+module_param(gart_debug, bool, 0644);
+MODULE_PARM_DESC(gart_debug, "Enable GART debugging");