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, 665 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
new file mode 100644
index 000000000..f024dc939
--- /dev/null
+++ b/drivers/gpu/drm/drm_vm.c
@@ -0,0 +1,665 @@
+/*
+ * \file drm_vm.c
+ * Memory mapping for DRM
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/*
+ * Created: Mon Jan  4 08:58:31 1999 by faith@valinux.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All Rights Reserved.
+ *
+ * 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 (including the next
+ * paragraph) 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
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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.
+ */
+
+#include <linux/export.h>
+#include <linux/pci.h>
+#include <linux/seq_file.h>
+#include <linux/vmalloc.h>
+#include <linux/pgtable.h>
+
+#if defined(__ia64__)
+#include <linux/efi.h>
+#include <linux/slab.h>
+#endif
+#include <linux/mem_encrypt.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_print.h>
+
+#include "drm_internal.h"
+#include "drm_legacy.h"
+
+struct drm_vma_entry {
+	struct list_head head;
+	struct vm_area_struct *vma;
+	pid_t pid;
+};
+
+static void drm_vm_open(struct vm_area_struct *vma);
+static void drm_vm_close(struct vm_area_struct *vma);
+
+static pgprot_t drm_io_prot(struct drm_local_map *map,
+			    struct vm_area_struct *vma)
+{
+	pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
+
+#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) || \
+    defined(__mips__) || defined(__loongarch__)
+	if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING))
+		tmp = pgprot_noncached(tmp);
+	else
+		tmp = pgprot_writecombine(tmp);
+#elif defined(__ia64__)
+	if (efi_range_is_wc(vma->vm_start, vma->vm_end -
+				    vma->vm_start))
+		tmp = pgprot_writecombine(tmp);
+	else
+		tmp = pgprot_noncached(tmp);
+#elif defined(__sparc__) || defined(__arm__)
+	tmp = pgprot_noncached(tmp);
+#endif
+	return tmp;
+}
+
+static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma)
+{
+	pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
+
+#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
+	tmp = pgprot_noncached_wc(tmp);
+#endif
+	return tmp;
+}
+
+/*
+ * \c fault method for AGP virtual memory.
+ *
+ * \param vma virtual memory area.
+ * \param address access address.
+ * \return pointer to the page structure.
+ *
+ * Find the right map and if it's AGP memory find the real physical page to
+ * map, get the page, increment the use count and return it.
+ */
+#if IS_ENABLED(CONFIG_AGP)
+static vm_fault_t drm_vm_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct drm_file *priv = vma->vm_file->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	struct drm_local_map *map = NULL;
+	struct drm_map_list *r_list;
+	struct drm_hash_item *hash;
+
+	/*
+	 * Find the right map
+	 */
+	if (!dev->agp)
+		goto vm_fault_error;
+
+	if (!dev->agp || !dev->agp->cant_use_aperture)
+		goto vm_fault_error;
+
+	if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash))
+		goto vm_fault_error;
+
+	r_list = drm_hash_entry(hash, struct drm_map_list, hash);
+	map = r_list->map;
+
+	if (map && map->type == _DRM_AGP) {
+		/*
+		 * Using vm_pgoff as a selector forces us to use this unusual
+		 * addressing scheme.
+		 */
+		resource_size_t offset = vmf->address - vma->vm_start;
+		resource_size_t baddr = map->offset + offset;
+		struct drm_agp_mem *agpmem;
+		struct page *page;
+
+#ifdef __alpha__
+		/*
+		 * Adjust to a bus-relative address
+		 */
+		baddr -= dev->hose->mem_space->start;
+#endif
+
+		/*
+		 * It's AGP memory - find the real physical page to map
+		 */
+		list_for_each_entry(agpmem, &dev->agp->memory, head) {
+			if (agpmem->bound <= baddr &&
+			    agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
+				break;
+		}
+
+		if (&agpmem->head == &dev->agp->memory)
+			goto vm_fault_error;
+
+		/*
+		 * Get the page, inc the use count, and return it
+		 */
+		offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
+		page = agpmem->memory->pages[offset];
+		get_page(page);
+		vmf->page = page;
+
+		DRM_DEBUG
+		    ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n",
+		     (unsigned long long)baddr,
+		     agpmem->memory->pages[offset],
+		     (unsigned long long)offset,
+		     page_count(page));
+		return 0;
+	}
+vm_fault_error:
+	return VM_FAULT_SIGBUS;	/* Disallow mremap */
+}
+#else
+static vm_fault_t drm_vm_fault(struct vm_fault *vmf)
+{
+	return VM_FAULT_SIGBUS;
+}
+#endif
+
+/*
+ * \c nopage method for shared virtual memory.
+ *
+ * \param vma virtual memory area.
+ * \param address access address.
+ * \return pointer to the page structure.
+ *
+ * Get the mapping, find the real physical page to map, get the page, and
+ * return it.
+ */
+static vm_fault_t drm_vm_shm_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct drm_local_map *map = vma->vm_private_data;
+	unsigned long offset;
+	unsigned long i;
+	struct page *page;
+
+	if (!map)
+		return VM_FAULT_SIGBUS;	/* Nothing allocated */
+
+	offset = vmf->address - vma->vm_start;
+	i = (unsigned long)map->handle + offset;
+	page = vmalloc_to_page((void *)i);
+	if (!page)
+		return VM_FAULT_SIGBUS;
+	get_page(page);
+	vmf->page = page;
+
+	DRM_DEBUG("shm_fault 0x%lx\n", offset);
+	return 0;
+}
+
+/*
+ * \c close method for shared virtual memory.
+ *
+ * \param vma virtual memory area.
+ *
+ * Deletes map information if we are the last
+ * person to close a mapping and it's not in the global maplist.
+ */
+static void drm_vm_shm_close(struct vm_area_struct *vma)
+{
+	struct drm_file *priv = vma->vm_file->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	struct drm_vma_entry *pt, *temp;
+	struct drm_local_map *map;
+	struct drm_map_list *r_list;
+	int found_maps = 0;
+
+	DRM_DEBUG("0x%08lx,0x%08lx\n",
+		  vma->vm_start, vma->vm_end - vma->vm_start);
+
+	map = vma->vm_private_data;
+
+	mutex_lock(&dev->struct_mutex);
+	list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
+		if (pt->vma->vm_private_data == map)
+			found_maps++;
+		if (pt->vma == vma) {
+			list_del(&pt->head);
+			kfree(pt);
+		}
+	}
+
+	/* We were the only map that was found */
+	if (found_maps == 1 && map->flags & _DRM_REMOVABLE) {
+		/* Check to see if we are in the maplist, if we are not, then
+		 * we delete this mappings information.
+		 */
+		found_maps = 0;
+		list_for_each_entry(r_list, &dev->maplist, head) {
+			if (r_list->map == map)
+				found_maps++;
+		}
+
+		if (!found_maps) {
+			switch (map->type) {
+			case _DRM_REGISTERS:
+			case _DRM_FRAME_BUFFER:
+				arch_phys_wc_del(map->mtrr);
+				iounmap(map->handle);
+				break;
+			case _DRM_SHM:
+				vfree(map->handle);
+				break;
+			case _DRM_AGP:
+			case _DRM_SCATTER_GATHER:
+				break;
+			case _DRM_CONSISTENT:
+				dma_free_coherent(dev->dev,
+						  map->size,
+						  map->handle,
+						  map->offset);
+				break;
+			}
+			kfree(map);
+		}
+	}
+	mutex_unlock(&dev->struct_mutex);
+}
+
+/*
+ * \c fault method for DMA virtual memory.
+ *
+ * \param address access address.
+ * \return pointer to the page structure.
+ *
+ * Determine the page number from the page offset and get it from drm_device_dma::pagelist.
+ */
+static vm_fault_t drm_vm_dma_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct drm_file *priv = vma->vm_file->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	struct drm_device_dma *dma = dev->dma;
+	unsigned long offset;
+	unsigned long page_nr;
+	struct page *page;
+
+	if (!dma)
+		return VM_FAULT_SIGBUS;	/* Error */
+	if (!dma->pagelist)
+		return VM_FAULT_SIGBUS;	/* Nothing allocated */
+
+	offset = vmf->address - vma->vm_start;
+					/* vm_[pg]off[set] should be 0 */
+	page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */
+	page = virt_to_page((void *)dma->pagelist[page_nr]);
+
+	get_page(page);
+	vmf->page = page;
+
+	DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr);
+	return 0;
+}
+
+/*
+ * \c fault method for scatter-gather virtual memory.
+ *
+ * \param address access address.
+ * \return pointer to the page structure.
+ *
+ * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
+ */
+static vm_fault_t drm_vm_sg_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct drm_local_map *map = vma->vm_private_data;
+	struct drm_file *priv = vma->vm_file->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	struct drm_sg_mem *entry = dev->sg;
+	unsigned long offset;
+	unsigned long map_offset;
+	unsigned long page_offset;
+	struct page *page;
+
+	if (!entry)
+		return VM_FAULT_SIGBUS;	/* Error */
+	if (!entry->pagelist)
+		return VM_FAULT_SIGBUS;	/* Nothing allocated */
+
+	offset = vmf->address - vma->vm_start;
+	map_offset = map->offset - (unsigned long)dev->sg->virtual;
+	page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
+	page = entry->pagelist[page_offset];
+	get_page(page);
+	vmf->page = page;
+
+	return 0;
+}
+
+/** AGP virtual memory operations */
+static const struct vm_operations_struct drm_vm_ops = {
+	.fault = drm_vm_fault,
+	.open = drm_vm_open,
+	.close = drm_vm_close,
+};
+
+/** Shared virtual memory operations */
+static const struct vm_operations_struct drm_vm_shm_ops = {
+	.fault = drm_vm_shm_fault,
+	.open = drm_vm_open,
+	.close = drm_vm_shm_close,
+};
+
+/** DMA virtual memory operations */
+static const struct vm_operations_struct drm_vm_dma_ops = {
+	.fault = drm_vm_dma_fault,
+	.open = drm_vm_open,
+	.close = drm_vm_close,
+};
+
+/** Scatter-gather virtual memory operations */
+static const struct vm_operations_struct drm_vm_sg_ops = {
+	.fault = drm_vm_sg_fault,
+	.open = drm_vm_open,
+	.close = drm_vm_close,
+};
+
+static void drm_vm_open_locked(struct drm_device *dev,
+			       struct vm_area_struct *vma)
+{
+	struct drm_vma_entry *vma_entry;
+
+	DRM_DEBUG("0x%08lx,0x%08lx\n",
+		  vma->vm_start, vma->vm_end - vma->vm_start);
+
+	vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL);
+	if (vma_entry) {
+		vma_entry->vma = vma;
+		vma_entry->pid = current->pid;
+		list_add(&vma_entry->head, &dev->vmalist);
+	}
+}
+
+static void drm_vm_open(struct vm_area_struct *vma)
+{
+	struct drm_file *priv = vma->vm_file->private_data;
+	struct drm_device *dev = priv->minor->dev;
+
+	mutex_lock(&dev->struct_mutex);
+	drm_vm_open_locked(dev, vma);
+	mutex_unlock(&dev->struct_mutex);
+}
+
+static void drm_vm_close_locked(struct drm_device *dev,
+				struct vm_area_struct *vma)
+{
+	struct drm_vma_entry *pt, *temp;
+
+	DRM_DEBUG("0x%08lx,0x%08lx\n",
+		  vma->vm_start, vma->vm_end - vma->vm_start);
+
+	list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
+		if (pt->vma == vma) {
+			list_del(&pt->head);
+			kfree(pt);
+			break;
+		}
+	}
+}
+
+/*
+ * \c close method for all virtual memory types.
+ *
+ * \param vma virtual memory area.
+ *
+ * Search the \p vma private data entry in drm_device::vmalist, unlink it, and
+ * free it.
+ */
+static void drm_vm_close(struct vm_area_struct *vma)
+{
+	struct drm_file *priv = vma->vm_file->private_data;
+	struct drm_device *dev = priv->minor->dev;
+
+	mutex_lock(&dev->struct_mutex);
+	drm_vm_close_locked(dev, vma);
+	mutex_unlock(&dev->struct_mutex);
+}
+
+/*
+ * mmap DMA memory.
+ *
+ * \param file_priv DRM file private.
+ * \param vma virtual memory area.
+ * \return zero on success or a negative number on failure.
+ *
+ * Sets the virtual memory area operations structure to vm_dma_ops, the file
+ * pointer, and calls vm_open().
+ */
+static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_file *priv = filp->private_data;
+	struct drm_device *dev;
+	struct drm_device_dma *dma;
+	unsigned long length = vma->vm_end - vma->vm_start;
+
+	dev = priv->minor->dev;
+	dma = dev->dma;
+	DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
+		  vma->vm_start, vma->vm_end, vma->vm_pgoff);
+
+	/* Length must match exact page count */
+	if (!dma || (length >> PAGE_SHIFT) != dma->page_count) {
+		return -EINVAL;
+	}
+
+	if (!capable(CAP_SYS_ADMIN) &&
+	    (dma->flags & _DRM_DMA_USE_PCI_RO)) {
+		vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
+#if defined(__i386__) || defined(__x86_64__)
+		pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
+#else
+		/* Ye gads this is ugly.  With more thought
+		   we could move this up higher and use
+		   `protection_map' instead.  */
+		vma->vm_page_prot =
+		    __pgprot(pte_val
+			     (pte_wrprotect
+			      (__pte(pgprot_val(vma->vm_page_prot)))));
+#endif
+	}
+
+	vma->vm_ops = &drm_vm_dma_ops;
+
+	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+
+	drm_vm_open_locked(dev, vma);
+	return 0;
+}
+
+static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev)
+{
+#ifdef __alpha__
+	return dev->hose->dense_mem_base;
+#else
+	return 0;
+#endif
+}
+
+/*
+ * mmap DMA memory.
+ *
+ * \param file_priv DRM file private.
+ * \param vma virtual memory area.
+ * \return zero on success or a negative number on failure.
+ *
+ * If the virtual memory area has no offset associated with it then it's a DMA
+ * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist,
+ * checks that the restricted flag is not set, sets the virtual memory operations
+ * according to the mapping type and remaps the pages. Finally sets the file
+ * pointer and calls vm_open().
+ */
+static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_file *priv = filp->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	struct drm_local_map *map = NULL;
+	resource_size_t offset = 0;
+	struct drm_hash_item *hash;
+
+	DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
+		  vma->vm_start, vma->vm_end, vma->vm_pgoff);
+
+	if (!priv->authenticated)
+		return -EACCES;
+
+	/* We check for "dma". On Apple's UniNorth, it's valid to have
+	 * the AGP mapped at physical address 0
+	 * --BenH.
+	 */
+	if (!vma->vm_pgoff
+#if IS_ENABLED(CONFIG_AGP)
+	    && (!dev->agp
+		|| dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
+#endif
+	    )
+		return drm_mmap_dma(filp, vma);
+
+	if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) {
+		DRM_ERROR("Could not find map\n");
+		return -EINVAL;
+	}
+
+	map = drm_hash_entry(hash, struct drm_map_list, hash)->map;
+	if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
+		return -EPERM;
+
+	/* Check for valid size. */
+	if (map->size < vma->vm_end - vma->vm_start)
+		return -EINVAL;
+
+	if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) {
+		vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
+#if defined(__i386__) || defined(__x86_64__)
+		pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
+#else
+		/* Ye gads this is ugly.  With more thought
+		   we could move this up higher and use
+		   `protection_map' instead.  */
+		vma->vm_page_prot =
+		    __pgprot(pte_val
+			     (pte_wrprotect
+			      (__pte(pgprot_val(vma->vm_page_prot)))));
+#endif
+	}
+
+	switch (map->type) {
+#if !defined(__arm__)
+	case _DRM_AGP:
+		if (dev->agp && dev->agp->cant_use_aperture) {
+			/*
+			 * On some platforms we can't talk to bus dma address from the CPU, so for
+			 * memory of type DRM_AGP, we'll deal with sorting out the real physical
+			 * pages and mappings in fault()
+			 */
+#if defined(__powerpc__)
+			vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+#endif
+			vma->vm_ops = &drm_vm_ops;
+			break;
+		}
+		fallthrough;	/* to _DRM_FRAME_BUFFER... */
+#endif
+	case _DRM_FRAME_BUFFER:
+	case _DRM_REGISTERS:
+		offset = drm_core_get_reg_ofs(dev);
+		vma->vm_page_prot = drm_io_prot(map, vma);
+		if (io_remap_pfn_range(vma, vma->vm_start,
+				       (map->offset + offset) >> PAGE_SHIFT,
+				       vma->vm_end - vma->vm_start,
+				       vma->vm_page_prot))
+			return -EAGAIN;
+		DRM_DEBUG("   Type = %d; start = 0x%lx, end = 0x%lx,"
+			  " offset = 0x%llx\n",
+			  map->type,
+			  vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset));
+
+		vma->vm_ops = &drm_vm_ops;
+		break;
+	case _DRM_CONSISTENT:
+		/* Consistent memory is really like shared memory. But
+		 * it's allocated in a different way, so avoid fault */
+		if (remap_pfn_range(vma, vma->vm_start,
+		    page_to_pfn(virt_to_page(map->handle)),
+		    vma->vm_end - vma->vm_start, vma->vm_page_prot))
+			return -EAGAIN;
+		vma->vm_page_prot = drm_dma_prot(map->type, vma);
+		fallthrough;	/* to _DRM_SHM */
+	case _DRM_SHM:
+		vma->vm_ops = &drm_vm_shm_ops;
+		vma->vm_private_data = (void *)map;
+		break;
+	case _DRM_SCATTER_GATHER:
+		vma->vm_ops = &drm_vm_sg_ops;
+		vma->vm_private_data = (void *)map;
+		vma->vm_page_prot = drm_dma_prot(map->type, vma);
+		break;
+	default:
+		return -EINVAL;	/* This should never happen. */
+	}
+	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+
+	drm_vm_open_locked(dev, vma);
+	return 0;
+}
+
+int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_file *priv = filp->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	int ret;
+
+	if (drm_dev_is_unplugged(dev))
+		return -ENODEV;
+
+	mutex_lock(&dev->struct_mutex);
+	ret = drm_mmap_locked(filp, vma);
+	mutex_unlock(&dev->struct_mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL(drm_legacy_mmap);
+
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
+void drm_legacy_vma_flush(struct drm_device *dev)
+{
+	struct drm_vma_entry *vma, *vma_temp;
+
+	/* Clear vma list (only needed for legacy drivers) */
+	list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
+		list_del(&vma->head);
+		kfree(vma);
+	}
+}
+#endif