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, 237 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_deps.c b/drivers/gpu/drm/i915/i915_deps.c
new file mode 100644
index 000000000..297b8e4e4
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_deps.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include <linux/dma-fence.h>
+#include <linux/slab.h>
+
+#include <drm/ttm/ttm_bo_api.h>
+
+#include "i915_deps.h"
+
+/**
+ * DOC: Set of utilities to dynamically collect dependencies into a
+ * structure which is fed into the GT migration code.
+ *
+ * Once we can do async unbinding, this is also needed to coalesce
+ * the migration fence with the unbind fences if these are coalesced
+ * post-migration.
+ *
+ * While collecting the individual dependencies, we store the refcounted
+ * struct dma_fence pointers in a realloc-managed pointer array, since
+ * that can be easily fed into a dma_fence_array. Other options are
+ * available, like for example an xarray for similarity with drm/sched.
+ * Can be changed easily if needed.
+ *
+ * A struct i915_deps need to be initialized using i915_deps_init().
+ * If i915_deps_add_dependency() or i915_deps_add_resv() return an
+ * error code they will internally call i915_deps_fini(), which frees
+ * all internal references and allocations.
+ */
+
+/* Min number of fence pointers in the array when an allocation occurs. */
+#define I915_DEPS_MIN_ALLOC_CHUNK 8U
+
+static void i915_deps_reset_fences(struct i915_deps *deps)
+{
+	if (deps->fences != &deps->single)
+		kfree(deps->fences);
+	deps->num_deps = 0;
+	deps->fences_size = 1;
+	deps->fences = &deps->single;
+}
+
+/**
+ * i915_deps_init - Initialize an i915_deps structure
+ * @deps: Pointer to the i915_deps structure to initialize.
+ * @gfp: The allocation mode for subsequenst allocations.
+ */
+void i915_deps_init(struct i915_deps *deps, gfp_t gfp)
+{
+	deps->fences = NULL;
+	deps->gfp = gfp;
+	i915_deps_reset_fences(deps);
+}
+
+/**
+ * i915_deps_fini - Finalize an i915_deps structure
+ * @deps: Pointer to the i915_deps structure to finalize.
+ *
+ * This function drops all fence references taken, conditionally frees and
+ * then resets the fences array.
+ */
+void i915_deps_fini(struct i915_deps *deps)
+{
+	unsigned int i;
+
+	for (i = 0; i < deps->num_deps; ++i)
+		dma_fence_put(deps->fences[i]);
+
+	if (deps->fences != &deps->single)
+		kfree(deps->fences);
+}
+
+static int i915_deps_grow(struct i915_deps *deps, struct dma_fence *fence,
+			  const struct ttm_operation_ctx *ctx)
+{
+	int ret;
+
+	if (deps->num_deps >= deps->fences_size) {
+		unsigned int new_size = 2 * deps->fences_size;
+		struct dma_fence **new_fences;
+
+		new_size = max(new_size, I915_DEPS_MIN_ALLOC_CHUNK);
+		new_fences = kmalloc_array(new_size, sizeof(*new_fences), deps->gfp);
+		if (!new_fences)
+			goto sync;
+
+		memcpy(new_fences, deps->fences,
+		       deps->fences_size * sizeof(*new_fences));
+		swap(new_fences, deps->fences);
+		if (new_fences != &deps->single)
+			kfree(new_fences);
+		deps->fences_size = new_size;
+	}
+	deps->fences[deps->num_deps++] = dma_fence_get(fence);
+	return 0;
+
+sync:
+	if (ctx->no_wait_gpu && !dma_fence_is_signaled(fence)) {
+		ret = -EBUSY;
+		goto unref;
+	}
+
+	ret = dma_fence_wait(fence, ctx->interruptible);
+	if (ret)
+		goto unref;
+
+	ret = fence->error;
+	if (ret)
+		goto unref;
+
+	return 0;
+
+unref:
+	i915_deps_fini(deps);
+	return ret;
+}
+
+/**
+ * i915_deps_sync - Wait for all the fences in the dependency collection
+ * @deps: Pointer to the i915_deps structure the fences of which to wait for.
+ * @ctx: Pointer to a struct ttm_operation_ctx indicating how the waits
+ * should be performed.
+ *
+ * This function waits for fences in the dependency collection. If it
+ * encounters an error during the wait or a fence error, the wait for
+ * further fences is aborted and the error returned.
+ *
+ * Return: Zero if successful, Negative error code on error.
+ */
+int i915_deps_sync(const struct i915_deps *deps, const struct ttm_operation_ctx *ctx)
+{
+	struct dma_fence **fences = deps->fences;
+	unsigned int i;
+	int ret = 0;
+
+	for (i = 0; i < deps->num_deps; ++i, ++fences) {
+		if (ctx->no_wait_gpu && !dma_fence_is_signaled(*fences)) {
+			ret = -EBUSY;
+			break;
+		}
+
+		ret = dma_fence_wait(*fences, ctx->interruptible);
+		if (!ret)
+			ret = (*fences)->error;
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+/**
+ * i915_deps_add_dependency - Add a fence to the dependency collection
+ * @deps: Pointer to the i915_deps structure a fence is to be added to.
+ * @fence: The fence to add.
+ * @ctx: Pointer to a struct ttm_operation_ctx indicating how waits are to
+ * be performed if waiting.
+ *
+ * Adds a fence to the dependency collection, and takes a reference on it.
+ * If the fence context is not zero and there was a later fence from the
+ * same fence context already added, then the fence is not added to the
+ * dependency collection. If the fence context is not zero and there was
+ * an earlier fence already added, then the fence will replace the older
+ * fence from the same context and the reference on the earlier fence will
+ * be dropped.
+ * If there is a failure to allocate memory to accommodate the new fence to
+ * be added, the new fence will instead be waited for and an error may
+ * be returned; depending on the value of @ctx, or if there was a fence
+ * error. If an error was returned, the dependency collection will be
+ * finalized and all fence reference dropped.
+ *
+ * Return: 0 if success. Negative error code on error.
+ */
+int i915_deps_add_dependency(struct i915_deps *deps,
+			     struct dma_fence *fence,
+			     const struct ttm_operation_ctx *ctx)
+{
+	unsigned int i;
+	int ret;
+
+	if (!fence)
+		return 0;
+
+	if (dma_fence_is_signaled(fence)) {
+		ret = fence->error;
+		if (ret)
+			i915_deps_fini(deps);
+		return ret;
+	}
+
+	for (i = 0; i < deps->num_deps; ++i) {
+		struct dma_fence *entry = deps->fences[i];
+
+		if (!entry->context || entry->context != fence->context)
+			continue;
+
+		if (dma_fence_is_later(fence, entry)) {
+			dma_fence_put(entry);
+			deps->fences[i] = dma_fence_get(fence);
+		}
+
+		return 0;
+	}
+
+	return i915_deps_grow(deps, fence, ctx);
+}
+
+/**
+ * i915_deps_add_resv - Add the fences of a reservation object to a dependency
+ * collection.
+ * @deps: Pointer to the i915_deps structure a fence is to be added to.
+ * @resv: The reservation object, then fences of which to add.
+ * @ctx: Pointer to a struct ttm_operation_ctx indicating how waits are to
+ * be performed if waiting.
+ *
+ * Calls i915_deps_add_depencency() on the indicated fences of @resv.
+ *
+ * Return: Zero on success. Negative error code on error.
+ */
+int i915_deps_add_resv(struct i915_deps *deps, struct dma_resv *resv,
+		       const struct ttm_operation_ctx *ctx)
+{
+	struct dma_resv_iter iter;
+	struct dma_fence *fence;
+
+	dma_resv_assert_held(resv);
+	dma_resv_for_each_fence(&iter, resv, dma_resv_usage_rw(true), fence) {
+		int ret = i915_deps_add_dependency(deps, fence, ctx);
+
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}