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, 495 insertions, 0 deletions

diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
new file mode 100644
index 000000000..095370ef0
--- /dev/null
+++ b/include/drm/drm_fb_helper.h
@@ -0,0 +1,495 @@
+/*
+ * Copyright (c) 2006-2009 Red Hat Inc.
+ * Copyright (c) 2006-2008 Intel Corporation
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ *
+ * DRM framebuffer helper functions
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ *      Dave Airlie <airlied@linux.ie>
+ *      Jesse Barnes <jesse.barnes@intel.com>
+ */
+#ifndef DRM_FB_HELPER_H
+#define DRM_FB_HELPER_H
+
+struct drm_clip_rect;
+struct drm_fb_helper;
+
+#include <linux/fb.h>
+
+#include <drm/drm_client.h>
+
+enum mode_set_atomic {
+	LEAVE_ATOMIC_MODE_SET,
+	ENTER_ATOMIC_MODE_SET,
+};
+
+/**
+ * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
+ * @fb_width: fbdev width
+ * @fb_height: fbdev height
+ * @surface_width: scanout buffer width
+ * @surface_height: scanout buffer height
+ * @surface_bpp: scanout buffer bpp
+ * @surface_depth: scanout buffer depth
+ *
+ * Note that the scanout surface width/height may be larger than the fbdev
+ * width/height.  In case of multiple displays, the scanout surface is sized
+ * according to the largest width/height (so it is large enough for all CRTCs
+ * to scanout).  But the fbdev width/height is sized to the minimum width/
+ * height of all the displays.  This ensures that fbcon fits on the smallest
+ * of the attached displays. fb_width/fb_height is used by
+ * drm_fb_helper_fill_info() to fill out the &fb_info.var structure.
+ */
+struct drm_fb_helper_surface_size {
+	u32 fb_width;
+	u32 fb_height;
+	u32 surface_width;
+	u32 surface_height;
+	u32 surface_bpp;
+	u32 surface_depth;
+};
+
+/**
+ * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
+ *
+ * Driver callbacks used by the fbdev emulation helper library.
+ */
+struct drm_fb_helper_funcs {
+	/**
+	 * @fb_probe:
+	 *
+	 * Driver callback to allocate and initialize the fbdev info structure.
+	 * Furthermore it also needs to allocate the DRM framebuffer used to
+	 * back the fbdev.
+	 *
+	 * This callback is mandatory.
+	 *
+	 * RETURNS:
+	 *
+	 * The driver should return 0 on success and a negative error code on
+	 * failure.
+	 */
+	int (*fb_probe)(struct drm_fb_helper *helper,
+			struct drm_fb_helper_surface_size *sizes);
+
+	/**
+	 * @fb_dirty:
+	 *
+	 * Driver callback to update the framebuffer memory. If set, fbdev
+	 * emulation will invoke this callback in regular intervals after
+	 * the framebuffer has been written.
+	 *
+	 * This callback is optional.
+	 *
+	 * Returns:
+	 * 0 on success, or an error code otherwise.
+	 */
+	int (*fb_dirty)(struct drm_fb_helper *helper, struct drm_clip_rect *clip);
+};
+
+/**
+ * struct drm_fb_helper - main structure to emulate fbdev on top of KMS
+ * @fb: Scanout framebuffer object
+ * @dev: DRM device
+ * @funcs: driver callbacks for fb helper
+ * @info: emulated fbdev device info struct
+ * @pseudo_palette: fake palette of 16 colors
+ * @damage_clip: clip rectangle used with deferred_io to accumulate damage to
+ *                the screen buffer
+ * @damage_lock: spinlock protecting @damage_clip
+ * @damage_work: worker used to flush the framebuffer
+ * @resume_work: worker used during resume if the console lock is already taken
+ *
+ * This is the main structure used by the fbdev helpers. Drivers supporting
+ * fbdev emulation should embedded this into their overall driver structure.
+ * Drivers must also fill out a &struct drm_fb_helper_funcs with a few
+ * operations.
+ */
+struct drm_fb_helper {
+	/**
+	 * @client:
+	 *
+	 * DRM client used by the generic fbdev emulation.
+	 */
+	struct drm_client_dev client;
+
+	/**
+	 * @buffer:
+	 *
+	 * Framebuffer used by the generic fbdev emulation.
+	 */
+	struct drm_client_buffer *buffer;
+
+	struct drm_framebuffer *fb;
+	struct drm_device *dev;
+	const struct drm_fb_helper_funcs *funcs;
+	struct fb_info *info;
+	u32 pseudo_palette[17];
+	struct drm_clip_rect damage_clip;
+	spinlock_t damage_lock;
+	struct work_struct damage_work;
+	struct work_struct resume_work;
+
+	/**
+	 * @lock:
+	 *
+	 * Top-level FBDEV helper lock. This protects all internal data
+	 * structures and lists, such as @connector_info and @crtc_info.
+	 *
+	 * FIXME: fbdev emulation locking is a mess and long term we want to
+	 * protect all helper internal state with this lock as well as reduce
+	 * core KMS locking as much as possible.
+	 */
+	struct mutex lock;
+
+	/**
+	 * @kernel_fb_list:
+	 *
+	 * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
+	 */
+	struct list_head kernel_fb_list;
+
+	/**
+	 * @delayed_hotplug:
+	 *
+	 * A hotplug was received while fbdev wasn't in control of the DRM
+	 * device, i.e. another KMS master was active. The output configuration
+	 * needs to be reprobe when fbdev is in control again.
+	 */
+	bool delayed_hotplug;
+
+	/**
+	 * @deferred_setup:
+	 *
+	 * If no outputs are connected (disconnected or unknown) the FB helper
+	 * code will defer setup until at least one of the outputs shows up.
+	 * This field keeps track of the status so that setup can be retried
+	 * at every hotplug event until it succeeds eventually.
+	 *
+	 * Protected by @lock.
+	 */
+	bool deferred_setup;
+
+	/**
+	 * @preferred_bpp:
+	 *
+	 * Temporary storage for the driver's preferred BPP setting passed to
+	 * FB helper initialization. This needs to be tracked so that deferred
+	 * FB helper setup can pass this on.
+	 *
+	 * See also: @deferred_setup
+	 */
+	int preferred_bpp;
+
+	/**
+	 * @hint_leak_smem_start:
+	 *
+	 * Hint to the fbdev emulation to store the framebuffer's physical
+	 * address in struct &fb_info.fix.smem_start. If the hint is unset,
+	 * the smem_start field should always be cleared to zero.
+	 */
+	bool hint_leak_smem_start;
+
+#ifdef CONFIG_FB_DEFERRED_IO
+	/**
+	 * @fbdefio:
+	 *
+	 * Temporary storage for the driver's FB deferred I/O handler. If the
+	 * driver uses the DRM fbdev emulation layer, this is set by the core
+	 * to a generic deferred I/O handler if a driver is preferring to use
+	 * a shadow buffer.
+	 */
+	struct fb_deferred_io fbdefio;
+#endif
+};
+
+static inline struct drm_fb_helper *
+drm_fb_helper_from_client(struct drm_client_dev *client)
+{
+	return container_of(client, struct drm_fb_helper, client);
+}
+
+/**
+ * define DRM_FB_HELPER_DEFAULT_OPS - helper define for drm drivers
+ *
+ * Helper define to register default implementations of drm_fb_helper
+ * functions. To be used in struct fb_ops of drm drivers.
+ */
+#define DRM_FB_HELPER_DEFAULT_OPS \
+	.fb_check_var	= drm_fb_helper_check_var, \
+	.fb_set_par	= drm_fb_helper_set_par, \
+	.fb_setcmap	= drm_fb_helper_setcmap, \
+	.fb_blank	= drm_fb_helper_blank, \
+	.fb_pan_display	= drm_fb_helper_pan_display, \
+	.fb_debug_enter = drm_fb_helper_debug_enter, \
+	.fb_debug_leave = drm_fb_helper_debug_leave, \
+	.fb_ioctl	= drm_fb_helper_ioctl
+
+#ifdef CONFIG_DRM_FBDEV_EMULATION
+void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
+			   const struct drm_fb_helper_funcs *funcs);
+int drm_fb_helper_init(struct drm_device *dev, struct drm_fb_helper *helper);
+void drm_fb_helper_fini(struct drm_fb_helper *helper);
+int drm_fb_helper_blank(int blank, struct fb_info *info);
+int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
+			      struct fb_info *info);
+int drm_fb_helper_set_par(struct fb_info *info);
+int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
+			    struct fb_info *info);
+
+int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
+
+struct fb_info *drm_fb_helper_alloc_info(struct drm_fb_helper *fb_helper);
+void drm_fb_helper_unregister_info(struct drm_fb_helper *fb_helper);
+void drm_fb_helper_fill_info(struct fb_info *info,
+			     struct drm_fb_helper *fb_helper,
+			     struct drm_fb_helper_surface_size *sizes);
+
+void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagereflist);
+
+ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
+			       size_t count, loff_t *ppos);
+ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
+				size_t count, loff_t *ppos);
+
+void drm_fb_helper_sys_fillrect(struct fb_info *info,
+				const struct fb_fillrect *rect);
+void drm_fb_helper_sys_copyarea(struct fb_info *info,
+				const struct fb_copyarea *area);
+void drm_fb_helper_sys_imageblit(struct fb_info *info,
+				 const struct fb_image *image);
+
+ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
+			       size_t count, loff_t *ppos);
+ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
+				size_t count, loff_t *ppos);
+
+void drm_fb_helper_cfb_fillrect(struct fb_info *info,
+				const struct fb_fillrect *rect);
+void drm_fb_helper_cfb_copyarea(struct fb_info *info,
+				const struct fb_copyarea *area);
+void drm_fb_helper_cfb_imageblit(struct fb_info *info,
+				 const struct fb_image *image);
+
+void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend);
+void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
+					bool suspend);
+
+int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
+
+int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
+			unsigned long arg);
+
+int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
+int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
+int drm_fb_helper_debug_enter(struct fb_info *info);
+int drm_fb_helper_debug_leave(struct fb_info *info);
+
+void drm_fb_helper_lastclose(struct drm_device *dev);
+void drm_fb_helper_output_poll_changed(struct drm_device *dev);
+#else
+static inline void drm_fb_helper_prepare(struct drm_device *dev,
+					struct drm_fb_helper *helper,
+					const struct drm_fb_helper_funcs *funcs)
+{
+}
+
+static inline int drm_fb_helper_init(struct drm_device *dev,
+		       struct drm_fb_helper *helper)
+{
+	/* So drivers can use it to free the struct */
+	helper->dev = dev;
+	dev->fb_helper = helper;
+
+	return 0;
+}
+
+static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
+{
+	if (helper && helper->dev)
+		helper->dev->fb_helper = NULL;
+}
+
+static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
+					    struct fb_info *info)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_set_par(struct fb_info *info)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
+					  struct fb_info *info)
+{
+	return 0;
+}
+
+static inline int
+drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
+{
+	return 0;
+}
+
+static inline struct fb_info *
+drm_fb_helper_alloc_info(struct drm_fb_helper *fb_helper)
+{
+	return NULL;
+}
+
+static inline void drm_fb_helper_unregister_info(struct drm_fb_helper *fb_helper)
+{
+}
+
+static inline void
+drm_fb_helper_fill_info(struct fb_info *info,
+			struct drm_fb_helper *fb_helper,
+			struct drm_fb_helper_surface_size *sizes)
+{
+}
+
+static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
+					struct fb_info *info)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
+				      unsigned long arg)
+{
+	return 0;
+}
+
+static inline void drm_fb_helper_deferred_io(struct fb_info *info,
+					     struct list_head *pagelist)
+{
+}
+
+static inline int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper)
+{
+	return -ENODEV;
+}
+
+static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
+					     char __user *buf, size_t count,
+					     loff_t *ppos)
+{
+	return -ENODEV;
+}
+
+static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
+					      const char __user *buf,
+					      size_t count, loff_t *ppos)
+{
+	return -ENODEV;
+}
+
+static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
+					      const struct fb_fillrect *rect)
+{
+}
+
+static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
+					      const struct fb_copyarea *area)
+{
+}
+
+static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
+					       const struct fb_image *image)
+{
+}
+
+static inline ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
+					     size_t count, loff_t *ppos)
+{
+	return -ENODEV;
+}
+
+static inline ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
+					      size_t count, loff_t *ppos)
+{
+	return -ENODEV;
+}
+
+static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
+					      const struct fb_fillrect *rect)
+{
+}
+
+static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
+					      const struct fb_copyarea *area)
+{
+}
+
+static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
+					       const struct fb_image *image)
+{
+}
+
+static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
+					     bool suspend)
+{
+}
+
+static inline void
+drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, bool suspend)
+{
+}
+
+static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
+					       int bpp_sel)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_debug_enter(struct fb_info *info)
+{
+	return 0;
+}
+
+static inline int drm_fb_helper_debug_leave(struct fb_info *info)
+{
+	return 0;
+}
+
+static inline void drm_fb_helper_lastclose(struct drm_device *dev)
+{
+}
+
+static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
+{
+}
+#endif
+
+#endif