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, 378 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_agp.c b/drivers/gpu/drm/radeon/radeon_agp.c
new file mode 100644
index 000000000..d124600b5
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_agp.c
@@ -0,0 +1,378 @@
+/*
+ * Copyright 2008 Red Hat Inc.
+ * Copyright 2009 Jerome Glisse.
+ *
+ * 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:
+ *    Dave Airlie
+ *    Jerome Glisse <glisse@freedesktop.org>
+ */
+
+#include <linux/pci.h>
+
+#include <drm/drm_device.h>
+#include <drm/radeon_drm.h>
+
+#include "radeon.h"
+
+#if IS_ENABLED(CONFIG_AGP)
+
+struct radeon_agpmode_quirk {
+	u32 hostbridge_vendor;
+	u32 hostbridge_device;
+	u32 chip_vendor;
+	u32 chip_device;
+	u32 subsys_vendor;
+	u32 subsys_device;
+	u32 default_mode;
+};
+
+static struct radeon_agpmode_quirk radeon_agpmode_quirk_list[] = {
+	/* Intel E7505 Memory Controller Hub / RV350 AR [Radeon 9600XT] Needs AGPMode 4 (deb #515326) */
+	{ PCI_VENDOR_ID_INTEL, 0x2550, PCI_VENDOR_ID_ATI, 0x4152, 0x1458, 0x4038, 4},
+	/* Intel 82865G/PE/P DRAM Controller/Host-Hub / Mobility 9800 Needs AGPMode 4 (deb #462590) */
+	{ PCI_VENDOR_ID_INTEL, 0x2570, PCI_VENDOR_ID_ATI, 0x4a4e, PCI_VENDOR_ID_DELL, 0x5106, 4},
+	/* Intel 82865G/PE/P DRAM Controller/Host-Hub / RV280 [Radeon 9200 SE] Needs AGPMode 4 (lp #300304) */
+	{ PCI_VENDOR_ID_INTEL, 0x2570, PCI_VENDOR_ID_ATI, 0x5964,
+		0x148c, 0x2073, 4},
+	/* Intel 82855PM Processor to I/O Controller / Mobility M6 LY Needs AGPMode 1 (deb #467235) */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c59,
+		PCI_VENDOR_ID_IBM, 0x052f, 1},
+	/* Intel 82855PM host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #195051) */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4e50,
+		PCI_VENDOR_ID_IBM, 0x0550, 1},
+	/* Intel 82855PM host bridge / RV250/M9 GL [Mobility FireGL 9000/Radeon 9000] needs AGPMode 1 (Thinkpad T40p) */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c66,
+		PCI_VENDOR_ID_IBM, 0x054d, 1},
+	/* Intel 82855PM host bridge / Mobility M7 needs AGPMode 1 */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c57,
+		PCI_VENDOR_ID_IBM, 0x0530, 1},
+	/* Intel 82855PM host bridge / FireGL Mobility T2 RV350 Needs AGPMode 2 (fdo #20647) */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4e54,
+		PCI_VENDOR_ID_IBM, 0x054f, 2},
+	/* Intel 82855PM host bridge / Mobility M9+ / VaioPCG-V505DX Needs AGPMode 2 (fdo #17928) */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x5c61,
+		PCI_VENDOR_ID_SONY, 0x816b, 2},
+	/* Intel 82855PM Processor to I/O Controller / Mobility M9+ Needs AGPMode 8 (phoronix forum) */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x5c61,
+		PCI_VENDOR_ID_SONY, 0x8195, 8},
+	/* Intel 82830 830 Chipset Host Bridge / Mobility M6 LY Needs AGPMode 2 (fdo #17360)*/
+	{ PCI_VENDOR_ID_INTEL, 0x3575, PCI_VENDOR_ID_ATI, 0x4c59,
+		PCI_VENDOR_ID_DELL, 0x00e3, 2},
+	/* Intel 82852/82855 host bridge / Mobility FireGL 9000 RV250 Needs AGPMode 1 (lp #296617) */
+	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4c66,
+		PCI_VENDOR_ID_DELL, 0x0149, 1},
+	/* Intel 82855PM host bridge / Mobility FireGL 9000 RV250 Needs AGPMode 1 for suspend/resume */
+	{ PCI_VENDOR_ID_INTEL, 0x3340, PCI_VENDOR_ID_ATI, 0x4c66,
+		PCI_VENDOR_ID_IBM, 0x0531, 1},
+	/* Intel 82852/82855 host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (deb #467460) */
+	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
+		0x1025, 0x0061, 1},
+	/* Intel 82852/82855 host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #203007) */
+	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
+		0x1025, 0x0064, 1},
+	/* Intel 82852/82855 host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #141551) */
+	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
+		PCI_VENDOR_ID_ASUSTEK, 0x1942, 1},
+	/* Intel 82852/82855 host bridge / Mobility 9600/9700 Needs AGPMode 1 (deb #510208) */
+	{ PCI_VENDOR_ID_INTEL, 0x3580, PCI_VENDOR_ID_ATI, 0x4e50,
+		0x10cf, 0x127f, 1},
+	/* ASRock K7VT4A+ AGP 8x / ATI Radeon 9250 AGP Needs AGPMode 4 (lp #133192) */
+	{ 0x1849, 0x3189, PCI_VENDOR_ID_ATI, 0x5960,
+		0x1787, 0x5960, 4},
+	/* VIA K8M800 Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 4 (fdo #12544) */
+	{ PCI_VENDOR_ID_VIA, 0x0204, PCI_VENDOR_ID_ATI, 0x5960,
+		0x17af, 0x2020, 4},
+	/* VIA KT880 Host Bridge / RV350 [Radeon 9550] Needs AGPMode 4 (fdo #19981) */
+	{ PCI_VENDOR_ID_VIA, 0x0269, PCI_VENDOR_ID_ATI, 0x4153,
+		PCI_VENDOR_ID_ASUSTEK, 0x003c, 4},
+	/* VIA VT8363 Host Bridge / R200 QL [Radeon 8500] Needs AGPMode 2 (lp #141551) */
+	{ PCI_VENDOR_ID_VIA, 0x0305, PCI_VENDOR_ID_ATI, 0x514c,
+		PCI_VENDOR_ID_ATI, 0x013a, 2},
+	/* VIA VT82C693A Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 2 (deb #515512) */
+	{ PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_ATI, 0x5960,
+		PCI_VENDOR_ID_ASUSTEK, 0x004c, 2},
+	/* VIA VT82C693A Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 2 */
+	{ PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_ATI, 0x5960,
+		PCI_VENDOR_ID_ASUSTEK, 0x0054, 2},
+	/* VIA VT8377 Host Bridge / R200 QM [Radeon 9100] Needs AGPMode 4 (deb #461144) */
+	{ PCI_VENDOR_ID_VIA, 0x3189, PCI_VENDOR_ID_ATI, 0x514d,
+		0x174b, 0x7149, 4},
+	/* VIA VT8377 Host Bridge / RV280 [Radeon 9200 PRO] Needs AGPMode 4 (lp #312693) */
+	{ PCI_VENDOR_ID_VIA, 0x3189, PCI_VENDOR_ID_ATI, 0x5960,
+		0x1462, 0x0380, 4},
+	/* VIA VT8377 Host Bridge / RV280 Needs AGPMode 4 (ati ML) */
+	{ PCI_VENDOR_ID_VIA, 0x3189, PCI_VENDOR_ID_ATI, 0x5964,
+		0x148c, 0x2073, 4},
+	/* ATI Host Bridge / RV280 [M9+] Needs AGPMode 1 (phoronix forum) */
+	{ PCI_VENDOR_ID_ATI, 0xcbb2, PCI_VENDOR_ID_ATI, 0x5c61,
+		PCI_VENDOR_ID_SONY, 0x8175, 1},
+	{ 0, 0, 0, 0, 0, 0, 0 },
+};
+
+struct radeon_agp_head *radeon_agp_head_init(struct drm_device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	struct radeon_agp_head *head = NULL;
+
+	head = kzalloc(sizeof(*head), GFP_KERNEL);
+	if (!head)
+		return NULL;
+	head->bridge = agp_find_bridge(pdev);
+	if (!head->bridge) {
+		head->bridge = agp_backend_acquire(pdev);
+		if (!head->bridge) {
+			kfree(head);
+			return NULL;
+		}
+		agp_copy_info(head->bridge, &head->agp_info);
+		agp_backend_release(head->bridge);
+	} else {
+		agp_copy_info(head->bridge, &head->agp_info);
+	}
+	if (head->agp_info.chipset == NOT_SUPPORTED) {
+		kfree(head);
+		return NULL;
+	}
+	INIT_LIST_HEAD(&head->memory);
+	head->cant_use_aperture = head->agp_info.cant_use_aperture;
+	head->page_mask = head->agp_info.page_mask;
+	head->base = head->agp_info.aper_base;
+
+	return head;
+}
+
+static int radeon_agp_head_acquire(struct radeon_device *rdev)
+{
+	struct drm_device *dev = rdev->ddev;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+
+	if (!rdev->agp)
+		return -ENODEV;
+	if (rdev->agp->acquired)
+		return -EBUSY;
+	rdev->agp->bridge = agp_backend_acquire(pdev);
+	if (!rdev->agp->bridge)
+		return -ENODEV;
+	rdev->agp->acquired = 1;
+	return 0;
+}
+
+static int radeon_agp_head_release(struct radeon_device *rdev)
+{
+	if (!rdev->agp || !rdev->agp->acquired)
+		return -EINVAL;
+	agp_backend_release(rdev->agp->bridge);
+	rdev->agp->acquired = 0;
+	return 0;
+}
+
+static int radeon_agp_head_enable(struct radeon_device *rdev, struct radeon_agp_mode mode)
+{
+	if (!rdev->agp || !rdev->agp->acquired)
+		return -EINVAL;
+
+	rdev->agp->mode = mode.mode;
+	agp_enable(rdev->agp->bridge, mode.mode);
+	rdev->agp->enabled = 1;
+	return 0;
+}
+
+static int radeon_agp_head_info(struct radeon_device *rdev, struct radeon_agp_info *info)
+{
+	struct agp_kern_info *kern;
+
+	if (!rdev->agp || !rdev->agp->acquired)
+		return -EINVAL;
+
+	kern = &rdev->agp->agp_info;
+	info->agp_version_major = kern->version.major;
+	info->agp_version_minor = kern->version.minor;
+	info->mode = kern->mode;
+	info->aperture_base = kern->aper_base;
+	info->aperture_size = kern->aper_size * 1024 * 1024;
+	info->memory_allowed = kern->max_memory << PAGE_SHIFT;
+	info->memory_used = kern->current_memory << PAGE_SHIFT;
+	info->id_vendor = kern->device->vendor;
+	info->id_device = kern->device->device;
+
+	return 0;
+}
+#endif
+
+int radeon_agp_init(struct radeon_device *rdev)
+{
+#if IS_ENABLED(CONFIG_AGP)
+	struct radeon_agpmode_quirk *p = radeon_agpmode_quirk_list;
+	struct radeon_agp_mode mode;
+	struct radeon_agp_info info;
+	uint32_t agp_status;
+	int default_mode;
+	bool is_v3;
+	int ret;
+
+	/* Acquire AGP. */
+	ret = radeon_agp_head_acquire(rdev);
+	if (ret) {
+		DRM_ERROR("Unable to acquire AGP: %d\n", ret);
+		return ret;
+	}
+
+	ret = radeon_agp_head_info(rdev, &info);
+	if (ret) {
+		radeon_agp_head_release(rdev);
+		DRM_ERROR("Unable to get AGP info: %d\n", ret);
+		return ret;
+	}
+
+	if (rdev->agp->agp_info.aper_size < 32) {
+		radeon_agp_head_release(rdev);
+		dev_warn(rdev->dev, "AGP aperture too small (%zuM) "
+			"need at least 32M, disabling AGP\n",
+			rdev->agp->agp_info.aper_size);
+		return -EINVAL;
+	}
+
+	mode.mode = info.mode;
+	/* chips with the agp to pcie bridge don't have the AGP_STATUS register
+	 * Just use the whatever mode the host sets up.
+	 */
+	if (rdev->family <= CHIP_RV350)
+		agp_status = (RREG32(RADEON_AGP_STATUS) | RADEON_AGPv3_MODE) & mode.mode;
+	else
+		agp_status = mode.mode;
+	is_v3 = !!(agp_status & RADEON_AGPv3_MODE);
+
+	if (is_v3) {
+		default_mode = (agp_status & RADEON_AGPv3_8X_MODE) ? 8 : 4;
+	} else {
+		if (agp_status & RADEON_AGP_4X_MODE) {
+			default_mode = 4;
+		} else if (agp_status & RADEON_AGP_2X_MODE) {
+			default_mode = 2;
+		} else {
+			default_mode = 1;
+		}
+	}
+
+	/* Apply AGPMode Quirks */
+	while (p && p->chip_device != 0) {
+		if (info.id_vendor == p->hostbridge_vendor &&
+		    info.id_device == p->hostbridge_device &&
+		    rdev->pdev->vendor == p->chip_vendor &&
+		    rdev->pdev->device == p->chip_device &&
+		    rdev->pdev->subsystem_vendor == p->subsys_vendor &&
+		    rdev->pdev->subsystem_device == p->subsys_device) {
+			default_mode = p->default_mode;
+		}
+		++p;
+	}
+
+	if (radeon_agpmode > 0) {
+		if ((radeon_agpmode < (is_v3 ? 4 : 1)) ||
+		    (radeon_agpmode > (is_v3 ? 8 : 4)) ||
+		    (radeon_agpmode & (radeon_agpmode - 1))) {
+			DRM_ERROR("Illegal AGP Mode: %d (valid %s), leaving at %d\n",
+				  radeon_agpmode, is_v3 ? "4, 8" : "1, 2, 4",
+				  default_mode);
+			radeon_agpmode = default_mode;
+		} else {
+			DRM_INFO("AGP mode requested: %d\n", radeon_agpmode);
+		}
+	} else {
+		radeon_agpmode = default_mode;
+	}
+
+	mode.mode &= ~RADEON_AGP_MODE_MASK;
+	if (is_v3) {
+		switch (radeon_agpmode) {
+		case 8:
+			mode.mode |= RADEON_AGPv3_8X_MODE;
+			break;
+		case 4:
+		default:
+			mode.mode |= RADEON_AGPv3_4X_MODE;
+			break;
+		}
+	} else {
+		switch (radeon_agpmode) {
+		case 4:
+			mode.mode |= RADEON_AGP_4X_MODE;
+			break;
+		case 2:
+			mode.mode |= RADEON_AGP_2X_MODE;
+			break;
+		case 1:
+		default:
+			mode.mode |= RADEON_AGP_1X_MODE;
+			break;
+		}
+	}
+
+	mode.mode &= ~RADEON_AGP_FW_MODE; /* disable fw */
+	ret = radeon_agp_head_enable(rdev, mode);
+	if (ret) {
+		DRM_ERROR("Unable to enable AGP (mode = 0x%lx)\n", mode.mode);
+		radeon_agp_head_release(rdev);
+		return ret;
+	}
+
+	rdev->mc.agp_base = rdev->agp->agp_info.aper_base;
+	rdev->mc.gtt_size = rdev->agp->agp_info.aper_size << 20;
+	rdev->mc.gtt_start = rdev->mc.agp_base;
+	rdev->mc.gtt_end = rdev->mc.gtt_start + rdev->mc.gtt_size - 1;
+	dev_info(rdev->dev, "GTT: %lluM 0x%08llX - 0x%08llX\n",
+		rdev->mc.gtt_size >> 20, rdev->mc.gtt_start, rdev->mc.gtt_end);
+
+	/* workaround some hw issues */
+	if (rdev->family < CHIP_R200) {
+		WREG32(RADEON_AGP_CNTL, RREG32(RADEON_AGP_CNTL) | 0x000e0000);
+	}
+	return 0;
+#else
+	return 0;
+#endif
+}
+
+void radeon_agp_resume(struct radeon_device *rdev)
+{
+#if IS_ENABLED(CONFIG_AGP)
+	int r;
+	if (rdev->flags & RADEON_IS_AGP) {
+		r = radeon_agp_init(rdev);
+		if (r)
+			dev_warn(rdev->dev, "radeon AGP reinit failed\n");
+	}
+#endif
+}
+
+void radeon_agp_fini(struct radeon_device *rdev)
+{
+#if IS_ENABLED(CONFIG_AGP)
+	if (rdev->agp && rdev->agp->acquired) {
+		radeon_agp_head_release(rdev);
+	}
+#endif
+}
+
+void radeon_agp_suspend(struct radeon_device *rdev)
+{
+	radeon_agp_fini(rdev);
+}