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, 381 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xen/xen_drm_front_kms.c b/drivers/gpu/drm/xen/xen_drm_front_kms.c
new file mode 100644
index 000000000..dfa78a49a
--- /dev/null
+++ b/drivers/gpu/drm/xen/xen_drm_front_kms.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+
+/*
+ *  Xen para-virtual DRM device
+ *
+ * Copyright (C) 2016-2018 EPAM Systems Inc.
+ *
+ * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "xen_drm_front.h"
+#include "xen_drm_front_conn.h"
+#include "xen_drm_front_kms.h"
+
+/*
+ * Timeout in ms to wait for frame done event from the backend:
+ * must be a bit more than IO time-out
+ */
+#define FRAME_DONE_TO_MS	(XEN_DRM_FRONT_WAIT_BACK_MS + 100)
+
+static struct xen_drm_front_drm_pipeline *
+to_xen_drm_pipeline(struct drm_simple_display_pipe *pipe)
+{
+	return container_of(pipe, struct xen_drm_front_drm_pipeline, pipe);
+}
+
+static void fb_destroy(struct drm_framebuffer *fb)
+{
+	struct xen_drm_front_drm_info *drm_info = fb->dev->dev_private;
+	int idx;
+
+	if (drm_dev_enter(fb->dev, &idx)) {
+		xen_drm_front_fb_detach(drm_info->front_info,
+					xen_drm_front_fb_to_cookie(fb));
+		drm_dev_exit(idx);
+	}
+	drm_gem_fb_destroy(fb);
+}
+
+static const struct drm_framebuffer_funcs fb_funcs = {
+	.destroy = fb_destroy,
+};
+
+static struct drm_framebuffer *
+fb_create(struct drm_device *dev, struct drm_file *filp,
+	  const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct xen_drm_front_drm_info *drm_info = dev->dev_private;
+	struct drm_framebuffer *fb;
+	struct drm_gem_object *gem_obj;
+	int ret;
+
+	fb = drm_gem_fb_create_with_funcs(dev, filp, mode_cmd, &fb_funcs);
+	if (IS_ERR(fb))
+		return fb;
+
+	gem_obj = fb->obj[0];
+
+	ret = xen_drm_front_fb_attach(drm_info->front_info,
+				      xen_drm_front_dbuf_to_cookie(gem_obj),
+				      xen_drm_front_fb_to_cookie(fb),
+				      fb->width, fb->height,
+				      fb->format->format);
+	if (ret < 0) {
+		DRM_ERROR("Back failed to attach FB %p: %d\n", fb, ret);
+		goto fail;
+	}
+
+	return fb;
+
+fail:
+	drm_gem_fb_destroy(fb);
+	return ERR_PTR(ret);
+}
+
+static const struct drm_mode_config_funcs mode_config_funcs = {
+	.fb_create = fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void send_pending_event(struct xen_drm_front_drm_pipeline *pipeline)
+{
+	struct drm_crtc *crtc = &pipeline->pipe.crtc;
+	struct drm_device *dev = crtc->dev;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->event_lock, flags);
+	if (pipeline->pending_event)
+		drm_crtc_send_vblank_event(crtc, pipeline->pending_event);
+	pipeline->pending_event = NULL;
+	spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+static void display_enable(struct drm_simple_display_pipe *pipe,
+			   struct drm_crtc_state *crtc_state,
+			   struct drm_plane_state *plane_state)
+{
+	struct xen_drm_front_drm_pipeline *pipeline =
+			to_xen_drm_pipeline(pipe);
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_framebuffer *fb = plane_state->fb;
+	int ret, idx;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	ret = xen_drm_front_mode_set(pipeline, crtc->x, crtc->y,
+				     fb->width, fb->height,
+				     fb->format->cpp[0] * 8,
+				     xen_drm_front_fb_to_cookie(fb));
+
+	if (ret) {
+		DRM_ERROR("Failed to enable display: %d\n", ret);
+		pipeline->conn_connected = false;
+	}
+
+	drm_dev_exit(idx);
+}
+
+static void display_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct xen_drm_front_drm_pipeline *pipeline =
+			to_xen_drm_pipeline(pipe);
+	int ret = 0, idx;
+
+	if (drm_dev_enter(pipe->crtc.dev, &idx)) {
+		ret = xen_drm_front_mode_set(pipeline, 0, 0, 0, 0, 0,
+					     xen_drm_front_fb_to_cookie(NULL));
+		drm_dev_exit(idx);
+	}
+	if (ret)
+		DRM_ERROR("Failed to disable display: %d\n", ret);
+
+	/* Make sure we can restart with enabled connector next time */
+	pipeline->conn_connected = true;
+
+	/* release stalled event if any */
+	send_pending_event(pipeline);
+}
+
+void xen_drm_front_kms_on_frame_done(struct xen_drm_front_drm_pipeline *pipeline,
+				     u64 fb_cookie)
+{
+	/*
+	 * This runs in interrupt context, e.g. under
+	 * drm_info->front_info->io_lock, so we cannot call _sync version
+	 * to cancel the work
+	 */
+	cancel_delayed_work(&pipeline->pflip_to_worker);
+
+	send_pending_event(pipeline);
+}
+
+static void pflip_to_worker(struct work_struct *work)
+{
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct xen_drm_front_drm_pipeline *pipeline =
+			container_of(delayed_work,
+				     struct xen_drm_front_drm_pipeline,
+				     pflip_to_worker);
+
+	DRM_ERROR("Frame done timed-out, releasing");
+	send_pending_event(pipeline);
+}
+
+static bool display_send_page_flip(struct drm_simple_display_pipe *pipe,
+				   struct drm_plane_state *old_plane_state)
+{
+	struct drm_plane_state *plane_state =
+			drm_atomic_get_new_plane_state(old_plane_state->state,
+						       &pipe->plane);
+
+	/*
+	 * If old_plane_state->fb is NULL and plane_state->fb is not,
+	 * then this is an atomic commit which will enable display.
+	 * If old_plane_state->fb is not NULL and plane_state->fb is,
+	 * then this is an atomic commit which will disable display.
+	 * Ignore these and do not send page flip as this framebuffer will be
+	 * sent to the backend as a part of display_set_config call.
+	 */
+	if (old_plane_state->fb && plane_state->fb) {
+		struct xen_drm_front_drm_pipeline *pipeline =
+				to_xen_drm_pipeline(pipe);
+		struct xen_drm_front_drm_info *drm_info = pipeline->drm_info;
+		int ret;
+
+		schedule_delayed_work(&pipeline->pflip_to_worker,
+				      msecs_to_jiffies(FRAME_DONE_TO_MS));
+
+		ret = xen_drm_front_page_flip(drm_info->front_info,
+					      pipeline->index,
+					      xen_drm_front_fb_to_cookie(plane_state->fb));
+		if (ret) {
+			DRM_ERROR("Failed to send page flip request to backend: %d\n", ret);
+
+			pipeline->conn_connected = false;
+			/*
+			 * Report the flip not handled, so pending event is
+			 * sent, unblocking user-space.
+			 */
+			return false;
+		}
+		/*
+		 * Signal that page flip was handled, pending event will be sent
+		 * on frame done event from the backend.
+		 */
+		return true;
+	}
+
+	return false;
+}
+
+static int display_check(struct drm_simple_display_pipe *pipe,
+			 struct drm_plane_state *plane_state,
+			 struct drm_crtc_state *crtc_state)
+{
+	/*
+	 * Xen doesn't initialize vblanking via drm_vblank_init(), so
+	 * DRM helpers assume that it doesn't handle vblanking and start
+	 * sending out fake VBLANK events automatically.
+	 *
+	 * As xen contains it's own logic for sending out VBLANK events
+	 * in send_pending_event(), disable no_vblank (i.e., the xen
+	 * driver has vblanking support).
+	 */
+	crtc_state->no_vblank = false;
+
+	return 0;
+}
+
+static void display_update(struct drm_simple_display_pipe *pipe,
+			   struct drm_plane_state *old_plane_state)
+{
+	struct xen_drm_front_drm_pipeline *pipeline =
+			to_xen_drm_pipeline(pipe);
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_pending_vblank_event *event;
+	int idx;
+
+	event = crtc->state->event;
+	if (event) {
+		struct drm_device *dev = crtc->dev;
+		unsigned long flags;
+
+		WARN_ON(pipeline->pending_event);
+
+		spin_lock_irqsave(&dev->event_lock, flags);
+		crtc->state->event = NULL;
+
+		pipeline->pending_event = event;
+		spin_unlock_irqrestore(&dev->event_lock, flags);
+	}
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx)) {
+		send_pending_event(pipeline);
+		return;
+	}
+
+	/*
+	 * Send page flip request to the backend *after* we have event cached
+	 * above, so on page flip done event from the backend we can
+	 * deliver it and there is no race condition between this code and
+	 * event from the backend.
+	 * If this is not a page flip, e.g. no flip done event from the backend
+	 * is expected, then send now.
+	 */
+	if (!display_send_page_flip(pipe, old_plane_state))
+		send_pending_event(pipeline);
+
+	drm_dev_exit(idx);
+}
+
+static enum drm_mode_status
+display_mode_valid(struct drm_simple_display_pipe *pipe,
+		   const struct drm_display_mode *mode)
+{
+	struct xen_drm_front_drm_pipeline *pipeline =
+			container_of(pipe, struct xen_drm_front_drm_pipeline,
+				     pipe);
+
+	if (mode->hdisplay != pipeline->width)
+		return MODE_ERROR;
+
+	if (mode->vdisplay != pipeline->height)
+		return MODE_ERROR;
+
+	return MODE_OK;
+}
+
+static const struct drm_simple_display_pipe_funcs display_funcs = {
+	.mode_valid = display_mode_valid,
+	.enable = display_enable,
+	.disable = display_disable,
+	.check = display_check,
+	.update = display_update,
+};
+
+static int display_pipe_init(struct xen_drm_front_drm_info *drm_info,
+			     int index, struct xen_drm_front_cfg_connector *cfg,
+			     struct xen_drm_front_drm_pipeline *pipeline)
+{
+	struct drm_device *dev = drm_info->drm_dev;
+	const u32 *formats;
+	int format_count;
+	int ret;
+
+	pipeline->drm_info = drm_info;
+	pipeline->index = index;
+	pipeline->height = cfg->height;
+	pipeline->width = cfg->width;
+
+	INIT_DELAYED_WORK(&pipeline->pflip_to_worker, pflip_to_worker);
+
+	ret = xen_drm_front_conn_init(drm_info, &pipeline->conn);
+	if (ret)
+		return ret;
+
+	formats = xen_drm_front_conn_get_formats(&format_count);
+
+	return drm_simple_display_pipe_init(dev, &pipeline->pipe,
+					    &display_funcs, formats,
+					    format_count, NULL,
+					    &pipeline->conn);
+}
+
+int xen_drm_front_kms_init(struct xen_drm_front_drm_info *drm_info)
+{
+	struct drm_device *dev = drm_info->drm_dev;
+	int i, ret;
+
+	drm_mode_config_init(dev);
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.max_width = 4095;
+	dev->mode_config.max_height = 2047;
+	dev->mode_config.funcs = &mode_config_funcs;
+
+	for (i = 0; i < drm_info->front_info->cfg.num_connectors; i++) {
+		struct xen_drm_front_cfg_connector *cfg =
+				&drm_info->front_info->cfg.connectors[i];
+		struct xen_drm_front_drm_pipeline *pipeline =
+				&drm_info->pipeline[i];
+
+		ret = display_pipe_init(drm_info, i, cfg, pipeline);
+		if (ret) {
+			drm_mode_config_cleanup(dev);
+			return ret;
+		}
+	}
+
+	drm_mode_config_reset(dev);
+	drm_kms_helper_poll_init(dev);
+	return 0;
+}
+
+void xen_drm_front_kms_fini(struct xen_drm_front_drm_info *drm_info)
+{
+	int i;
+
+	for (i = 0; i < drm_info->front_info->cfg.num_connectors; i++) {
+		struct xen_drm_front_drm_pipeline *pipeline =
+				&drm_info->pipeline[i];
+
+		cancel_delayed_work_sync(&pipeline->pflip_to_worker);
+
+		send_pending_event(pipeline);
+	}
+}