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, 307 insertions, 0 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
new file mode 100644
index 000000000..e7147e304
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_device.c
@@ -0,0 +1,307 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+
+/*
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Christian König
+ */
+
+#define pr_fmt(fmt) "[TTM DEVICE] " fmt
+
+#include <linux/mm.h>
+
+#include <drm/ttm/ttm_device.h>
+#include <drm/ttm/ttm_tt.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_bo_api.h>
+
+#include "ttm_module.h"
+
+/*
+ * ttm_global_mutex - protecting the global state
+ */
+static DEFINE_MUTEX(ttm_global_mutex);
+static unsigned ttm_glob_use_count;
+struct ttm_global ttm_glob;
+EXPORT_SYMBOL(ttm_glob);
+
+struct dentry *ttm_debugfs_root;
+
+static void ttm_global_release(void)
+{
+	struct ttm_global *glob = &ttm_glob;
+
+	mutex_lock(&ttm_global_mutex);
+	if (--ttm_glob_use_count > 0)
+		goto out;
+
+	ttm_pool_mgr_fini();
+	debugfs_remove(ttm_debugfs_root);
+
+	__free_page(glob->dummy_read_page);
+	memset(glob, 0, sizeof(*glob));
+out:
+	mutex_unlock(&ttm_global_mutex);
+}
+
+static int ttm_global_init(void)
+{
+	struct ttm_global *glob = &ttm_glob;
+	unsigned long num_pages, num_dma32;
+	struct sysinfo si;
+	int ret = 0;
+
+	mutex_lock(&ttm_global_mutex);
+	if (++ttm_glob_use_count > 1)
+		goto out;
+
+	si_meminfo(&si);
+
+	ttm_debugfs_root = debugfs_create_dir("ttm", NULL);
+	if (IS_ERR(ttm_debugfs_root)) {
+		ttm_debugfs_root = NULL;
+	}
+
+	/* Limit the number of pages in the pool to about 50% of the total
+	 * system memory.
+	 */
+	num_pages = ((u64)si.totalram * si.mem_unit) >> PAGE_SHIFT;
+	num_pages /= 2;
+
+	/* But for DMA32 we limit ourself to only use 2GiB maximum. */
+	num_dma32 = (u64)(si.totalram - si.totalhigh) * si.mem_unit
+		>> PAGE_SHIFT;
+	num_dma32 = min(num_dma32, 2UL << (30 - PAGE_SHIFT));
+
+	ttm_pool_mgr_init(num_pages);
+	ttm_tt_mgr_init(num_pages, num_dma32);
+
+	glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
+
+	if (unlikely(glob->dummy_read_page == NULL)) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	INIT_LIST_HEAD(&glob->device_list);
+	atomic_set(&glob->bo_count, 0);
+
+	debugfs_create_atomic_t("buffer_objects", 0444, ttm_debugfs_root,
+				&glob->bo_count);
+out:
+	if (ret && ttm_debugfs_root)
+		debugfs_remove(ttm_debugfs_root);
+	if (ret)
+		--ttm_glob_use_count;
+	mutex_unlock(&ttm_global_mutex);
+	return ret;
+}
+
+/*
+ * A buffer object shrink method that tries to swap out the first
+ * buffer object on the global::swap_lru list.
+ */
+int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags)
+{
+	struct ttm_global *glob = &ttm_glob;
+	struct ttm_device *bdev;
+	int ret = 0;
+
+	mutex_lock(&ttm_global_mutex);
+	list_for_each_entry(bdev, &glob->device_list, device_list) {
+		ret = ttm_device_swapout(bdev, ctx, gfp_flags);
+		if (ret > 0) {
+			list_move_tail(&bdev->device_list, &glob->device_list);
+			break;
+		}
+	}
+	mutex_unlock(&ttm_global_mutex);
+	return ret;
+}
+EXPORT_SYMBOL(ttm_global_swapout);
+
+int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx,
+		       gfp_t gfp_flags)
+{
+	struct ttm_resource_cursor cursor;
+	struct ttm_resource_manager *man;
+	struct ttm_resource *res;
+	unsigned i;
+	int ret;
+
+	spin_lock(&bdev->lru_lock);
+	for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) {
+		man = ttm_manager_type(bdev, i);
+		if (!man || !man->use_tt)
+			continue;
+
+		ttm_resource_manager_for_each_res(man, &cursor, res) {
+			struct ttm_buffer_object *bo = res->bo;
+			uint32_t num_pages;
+
+			if (!bo)
+				continue;
+
+			num_pages = PFN_UP(bo->base.size);
+			ret = ttm_bo_swapout(bo, ctx, gfp_flags);
+			/* ttm_bo_swapout has dropped the lru_lock */
+			if (!ret)
+				return num_pages;
+			if (ret != -EBUSY)
+				return ret;
+		}
+	}
+	spin_unlock(&bdev->lru_lock);
+	return 0;
+}
+EXPORT_SYMBOL(ttm_device_swapout);
+
+static void ttm_device_delayed_workqueue(struct work_struct *work)
+{
+	struct ttm_device *bdev =
+		container_of(work, struct ttm_device, wq.work);
+
+	if (!ttm_bo_delayed_delete(bdev, false))
+		schedule_delayed_work(&bdev->wq,
+				      ((HZ / 100) < 1) ? 1 : HZ / 100);
+}
+
+/**
+ * ttm_device_init
+ *
+ * @bdev: A pointer to a struct ttm_device to initialize.
+ * @funcs: Function table for the device.
+ * @dev: The core kernel device pointer for DMA mappings and allocations.
+ * @mapping: The address space to use for this bo.
+ * @vma_manager: A pointer to a vma manager.
+ * @use_dma_alloc: If coherent DMA allocation API should be used.
+ * @use_dma32: If we should use GFP_DMA32 for device memory allocations.
+ *
+ * Initializes a struct ttm_device:
+ * Returns:
+ * !0: Failure.
+ */
+int ttm_device_init(struct ttm_device *bdev, struct ttm_device_funcs *funcs,
+		    struct device *dev, struct address_space *mapping,
+		    struct drm_vma_offset_manager *vma_manager,
+		    bool use_dma_alloc, bool use_dma32)
+{
+	struct ttm_global *glob = &ttm_glob;
+	int ret;
+
+	if (WARN_ON(vma_manager == NULL))
+		return -EINVAL;
+
+	ret = ttm_global_init();
+	if (ret)
+		return ret;
+
+	bdev->funcs = funcs;
+
+	ttm_sys_man_init(bdev);
+	ttm_pool_init(&bdev->pool, dev, use_dma_alloc, use_dma32);
+
+	bdev->vma_manager = vma_manager;
+	INIT_DELAYED_WORK(&bdev->wq, ttm_device_delayed_workqueue);
+	spin_lock_init(&bdev->lru_lock);
+	INIT_LIST_HEAD(&bdev->ddestroy);
+	INIT_LIST_HEAD(&bdev->pinned);
+	bdev->dev_mapping = mapping;
+	mutex_lock(&ttm_global_mutex);
+	list_add_tail(&bdev->device_list, &glob->device_list);
+	mutex_unlock(&ttm_global_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL(ttm_device_init);
+
+void ttm_device_fini(struct ttm_device *bdev)
+{
+	struct ttm_resource_manager *man;
+	unsigned i;
+
+	man = ttm_manager_type(bdev, TTM_PL_SYSTEM);
+	ttm_resource_manager_set_used(man, false);
+	ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, NULL);
+
+	mutex_lock(&ttm_global_mutex);
+	list_del(&bdev->device_list);
+	mutex_unlock(&ttm_global_mutex);
+
+	cancel_delayed_work_sync(&bdev->wq);
+
+	if (ttm_bo_delayed_delete(bdev, true))
+		pr_debug("Delayed destroy list was clean\n");
+
+	spin_lock(&bdev->lru_lock);
+	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
+		if (list_empty(&man->lru[0]))
+			pr_debug("Swap list %d was clean\n", i);
+	spin_unlock(&bdev->lru_lock);
+
+	ttm_pool_fini(&bdev->pool);
+	ttm_global_release();
+}
+EXPORT_SYMBOL(ttm_device_fini);
+
+static void ttm_device_clear_lru_dma_mappings(struct ttm_device *bdev,
+					      struct list_head *list)
+{
+	struct ttm_resource *res;
+
+	spin_lock(&bdev->lru_lock);
+	while ((res = list_first_entry_or_null(list, typeof(*res), lru))) {
+		struct ttm_buffer_object *bo = res->bo;
+
+		/* Take ref against racing releases once lru_lock is unlocked */
+		if (!ttm_bo_get_unless_zero(bo))
+			continue;
+
+		list_del_init(&res->lru);
+		spin_unlock(&bdev->lru_lock);
+
+		if (bo->ttm)
+			ttm_tt_unpopulate(bo->bdev, bo->ttm);
+
+		ttm_bo_put(bo);
+		spin_lock(&bdev->lru_lock);
+	}
+	spin_unlock(&bdev->lru_lock);
+}
+
+void ttm_device_clear_dma_mappings(struct ttm_device *bdev)
+{
+	struct ttm_resource_manager *man;
+	unsigned int i, j;
+
+	ttm_device_clear_lru_dma_mappings(bdev, &bdev->pinned);
+
+	for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) {
+		man = ttm_manager_type(bdev, i);
+		if (!man || !man->use_tt)
+			continue;
+
+		for (j = 0; j < TTM_MAX_BO_PRIORITY; ++j)
+			ttm_device_clear_lru_dma_mappings(bdev, &man->lru[j]);
+	}
+}
+EXPORT_SYMBOL(ttm_device_clear_dma_mappings);