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, 398 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c
new file mode 100644
index 000000000..954b5f3a7
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c
@@ -0,0 +1,398 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "priv.h"
+#include "cgrp.h"
+#include "chan.h"
+#include "chid.h"
+#include "runl.h"
+
+#include <core/ramht.h>
+#include <subdev/timer.h>
+
+#include <nvif/class.h>
+
+void
+nv50_eobj_ramht_del(struct nvkm_chan *chan, int hash)
+{
+	nvkm_ramht_remove(chan->ramht, hash);
+}
+
+int
+nv50_eobj_ramht_add(struct nvkm_engn *engn, struct nvkm_object *eobj, struct nvkm_chan *chan)
+{
+	return nvkm_ramht_insert(chan->ramht, eobj, 0, 4, eobj->handle, engn->id << 20);
+}
+
+void
+nv50_chan_stop(struct nvkm_chan *chan)
+{
+	struct nvkm_device *device = chan->cgrp->runl->fifo->engine.subdev.device;
+
+	nvkm_mask(device, 0x002600 + (chan->id * 4), 0x80000000, 0x00000000);
+}
+
+void
+nv50_chan_start(struct nvkm_chan *chan)
+{
+	struct nvkm_device *device = chan->cgrp->runl->fifo->engine.subdev.device;
+
+	nvkm_mask(device, 0x002600 + (chan->id * 4), 0x80000000, 0x80000000);
+}
+
+void
+nv50_chan_unbind(struct nvkm_chan *chan)
+{
+	struct nvkm_device *device = chan->cgrp->runl->fifo->engine.subdev.device;
+
+	nvkm_wr32(device, 0x002600 + (chan->id * 4), 0x00000000);
+}
+
+static void
+nv50_chan_bind(struct nvkm_chan *chan)
+{
+	struct nvkm_device *device = chan->cgrp->runl->fifo->engine.subdev.device;
+
+	nvkm_wr32(device, 0x002600 + (chan->id * 4), chan->ramfc->addr >> 12);
+}
+
+static int
+nv50_chan_ramfc_write(struct nvkm_chan *chan, u64 offset, u64 length, u32 devm, bool priv)
+{
+	struct nvkm_device *device = chan->cgrp->runl->fifo->engine.subdev.device;
+	const u32 limit2 = ilog2(length / 8);
+	int ret;
+
+	ret = nvkm_gpuobj_new(device, 0x0200, 0x1000, true, chan->inst, &chan->ramfc);
+	if (ret)
+		return ret;
+
+	ret = nvkm_gpuobj_new(device, 0x1200, 0, true, chan->inst, &chan->eng);
+	if (ret)
+		return ret;
+
+	ret = nvkm_gpuobj_new(device, 0x4000, 0, false, chan->inst, &chan->pgd);
+	if (ret)
+		return ret;
+
+	ret = nvkm_ramht_new(device, 0x8000, 16, chan->inst, &chan->ramht);
+	if (ret)
+		return ret;
+
+	nvkm_kmap(chan->ramfc);
+	nvkm_wo32(chan->ramfc, 0x3c, 0x403f6078);
+	nvkm_wo32(chan->ramfc, 0x44, 0x01003fff);
+	nvkm_wo32(chan->ramfc, 0x48, chan->push->node->offset >> 4);
+	nvkm_wo32(chan->ramfc, 0x50, lower_32_bits(offset));
+	nvkm_wo32(chan->ramfc, 0x54, upper_32_bits(offset) | (limit2 << 16));
+	nvkm_wo32(chan->ramfc, 0x60, 0x7fffffff);
+	nvkm_wo32(chan->ramfc, 0x78, 0x00000000);
+	nvkm_wo32(chan->ramfc, 0x7c, 0x30000000 | devm);
+	nvkm_wo32(chan->ramfc, 0x80, ((chan->ramht->bits - 9) << 27) |
+				     (4 << 24) /* SEARCH_FULL */ |
+				     (chan->ramht->gpuobj->node->offset >> 4));
+	nvkm_done(chan->ramfc);
+	return 0;
+}
+
+static const struct nvkm_chan_func_ramfc
+nv50_chan_ramfc = {
+	.write = nv50_chan_ramfc_write,
+	.ctxdma = true,
+	.devm = 0xfff,
+};
+
+const struct nvkm_chan_func_userd
+nv50_chan_userd = {
+	.bar = 0,
+	.base = 0xc00000,
+	.size = 0x002000,
+};
+
+const struct nvkm_chan_func_inst
+nv50_chan_inst = {
+	.size = 0x10000,
+	.vmm = true,
+};
+
+static const struct nvkm_chan_func
+nv50_chan = {
+	.inst = &nv50_chan_inst,
+	.userd = &nv50_chan_userd,
+	.ramfc = &nv50_chan_ramfc,
+	.bind = nv50_chan_bind,
+	.unbind = nv50_chan_unbind,
+	.start = nv50_chan_start,
+	.stop = nv50_chan_stop,
+};
+
+static void
+nv50_ectx_bind(struct nvkm_engn *engn, struct nvkm_cctx *cctx, struct nvkm_chan *chan)
+{
+	struct nvkm_subdev *subdev = &chan->cgrp->runl->fifo->engine.subdev;
+	struct nvkm_device *device = subdev->device;
+	u64 start = 0, limit = 0;
+	u32 flags = 0, ptr0, save;
+
+	switch (engn->engine->subdev.type) {
+	case NVKM_ENGINE_GR    : ptr0 = 0x0000; break;
+	case NVKM_ENGINE_MPEG  : ptr0 = 0x0060; break;
+	default:
+		WARN_ON(1);
+		return;
+	}
+
+	if (!cctx) {
+		/* HW bug workaround:
+		 *
+		 * PFIFO will hang forever if the connected engines don't report
+		 * that they've processed the context switch request.
+		 *
+		 * In order for the kickoff to work, we need to ensure all the
+		 * connected engines are in a state where they can answer.
+		 *
+		 * Newer chipsets don't seem to suffer from this issue, and well,
+		 * there's also a "ignore these engines" bitmask reg we can use
+		 * if we hit the issue there..
+		 */
+		save = nvkm_mask(device, 0x00b860, 0x00000001, 0x00000001);
+
+		/* Tell engines to save out contexts. */
+		nvkm_wr32(device, 0x0032fc, chan->inst->addr >> 12);
+		nvkm_msec(device, 2000,
+			if (nvkm_rd32(device, 0x0032fc) != 0xffffffff)
+				break;
+		);
+		nvkm_wr32(device, 0x00b860, save);
+	} else {
+		flags = 0x00190000;
+		start = cctx->vctx->inst->addr;
+		limit = start + cctx->vctx->inst->size - 1;
+	}
+
+	nvkm_kmap(chan->eng);
+	nvkm_wo32(chan->eng, ptr0 + 0x00, flags);
+	nvkm_wo32(chan->eng, ptr0 + 0x04, lower_32_bits(limit));
+	nvkm_wo32(chan->eng, ptr0 + 0x08, lower_32_bits(start));
+	nvkm_wo32(chan->eng, ptr0 + 0x0c, upper_32_bits(limit) << 24 |
+					  lower_32_bits(start));
+	nvkm_wo32(chan->eng, ptr0 + 0x10, 0x00000000);
+	nvkm_wo32(chan->eng, ptr0 + 0x14, 0x00000000);
+	nvkm_done(chan->eng);
+}
+
+static const struct nvkm_engn_func
+nv50_engn = {
+	.bind = nv50_ectx_bind,
+	.ramht_add = nv50_eobj_ramht_add,
+	.ramht_del = nv50_eobj_ramht_del,
+};
+
+const struct nvkm_engn_func
+nv50_engn_sw = {
+	.ramht_add = nv50_eobj_ramht_add,
+	.ramht_del = nv50_eobj_ramht_del,
+};
+
+static bool
+nv50_runl_pending(struct nvkm_runl *runl)
+{
+	return nvkm_rd32(runl->fifo->engine.subdev.device, 0x0032ec) & 0x00000100;
+}
+
+int
+nv50_runl_wait(struct nvkm_runl *runl)
+{
+	struct nvkm_fifo *fifo = runl->fifo;
+
+	nvkm_msec(fifo->engine.subdev.device, fifo->timeout.chan_msec,
+		if (!nvkm_runl_update_pending(runl))
+			return 0;
+		usleep_range(1, 2);
+	);
+
+	return -ETIMEDOUT;
+}
+
+static void
+nv50_runl_commit(struct nvkm_runl *runl, struct nvkm_memory *memory, u32 start, int count)
+{
+	struct nvkm_device *device = runl->fifo->engine.subdev.device;
+	u64 addr = nvkm_memory_addr(memory) + start;
+
+	nvkm_wr32(device, 0x0032f4, addr >> 12);
+	nvkm_wr32(device, 0x0032ec, count);
+}
+
+static void
+nv50_runl_insert_chan(struct nvkm_chan *chan, struct nvkm_memory *memory, u64 offset)
+{
+	nvkm_wo32(memory, offset, chan->id);
+}
+
+static struct nvkm_memory *
+nv50_runl_alloc(struct nvkm_runl *runl, u32 *offset)
+{
+	const u32 segment = ALIGN((runl->cgrp_nr + runl->chan_nr) * runl->func->size, 0x1000);
+	const u32 maxsize = (runl->cgid ? runl->cgid->nr : 0) + runl->chid->nr;
+	int ret;
+
+	if (unlikely(!runl->mem)) {
+		ret = nvkm_memory_new(runl->fifo->engine.subdev.device, NVKM_MEM_TARGET_INST,
+				      maxsize * 2 * runl->func->size, 0, false, &runl->mem);
+		if (ret) {
+			RUNL_ERROR(runl, "alloc %d\n", ret);
+			return ERR_PTR(ret);
+		}
+	} else {
+		if (runl->offset + segment >= nvkm_memory_size(runl->mem)) {
+			ret = runl->func->wait(runl);
+			if (ret) {
+				RUNL_DEBUG(runl, "rewind timeout");
+				return ERR_PTR(ret);
+			}
+
+			runl->offset = 0;
+		}
+	}
+
+	*offset = runl->offset;
+	runl->offset += segment;
+	return runl->mem;
+}
+
+int
+nv50_runl_update(struct nvkm_runl *runl)
+{
+	struct nvkm_memory *memory;
+	struct nvkm_cgrp *cgrp;
+	struct nvkm_chan *chan;
+	u32 start, offset, count;
+
+	/*TODO: prio, interleaving. */
+
+	RUNL_TRACE(runl, "RAMRL: update cgrps:%d chans:%d", runl->cgrp_nr, runl->chan_nr);
+	memory = nv50_runl_alloc(runl, &start);
+	if (IS_ERR(memory))
+		return PTR_ERR(memory);
+
+	RUNL_TRACE(runl, "RAMRL: update start:%08x", start);
+	offset = start;
+
+	nvkm_kmap(memory);
+	nvkm_runl_foreach_cgrp(cgrp, runl) {
+		if (cgrp->hw) {
+			CGRP_TRACE(cgrp, "     RAMRL+%08x: chans:%d", offset, cgrp->chan_nr);
+			runl->func->insert_cgrp(cgrp, memory, offset);
+			offset += runl->func->size;
+		}
+
+		nvkm_cgrp_foreach_chan(chan, cgrp) {
+			CHAN_TRACE(chan, "RAMRL+%08x: [%s]", offset, chan->name);
+			runl->func->insert_chan(chan, memory, offset);
+			offset += runl->func->size;
+		}
+	}
+	nvkm_done(memory);
+
+	/*TODO: look into using features on newer HW to guarantee forward progress. */
+	list_rotate_left(&runl->cgrps);
+
+	count = (offset - start) / runl->func->size;
+	RUNL_TRACE(runl, "RAMRL: commit start:%08x count:%d", start, count);
+
+	runl->func->commit(runl, memory, start, count);
+	return 0;
+}
+
+const struct nvkm_runl_func
+nv50_runl = {
+	.size = 4,
+	.update = nv50_runl_update,
+	.insert_chan = nv50_runl_insert_chan,
+	.commit = nv50_runl_commit,
+	.wait = nv50_runl_wait,
+	.pending = nv50_runl_pending,
+};
+
+void
+nv50_fifo_init(struct nvkm_fifo *fifo)
+{
+	struct nvkm_runl *runl = nvkm_runl_first(fifo);
+	struct nvkm_device *device = fifo->engine.subdev.device;
+	int i;
+
+	nvkm_mask(device, 0x000200, 0x00000100, 0x00000000);
+	nvkm_mask(device, 0x000200, 0x00000100, 0x00000100);
+	nvkm_wr32(device, 0x00250c, 0x6f3cfc34);
+	nvkm_wr32(device, 0x002044, 0x01003fff);
+
+	nvkm_wr32(device, 0x002100, 0xffffffff);
+	nvkm_wr32(device, 0x002140, 0xbfffffff);
+
+	for (i = 0; i < 128; i++)
+		nvkm_wr32(device, 0x002600 + (i * 4), 0x00000000);
+
+	atomic_set(&runl->changed, 1);
+	runl->func->update(runl);
+
+	nvkm_wr32(device, 0x003200, 0x00000001);
+	nvkm_wr32(device, 0x003250, 0x00000001);
+	nvkm_wr32(device, 0x002500, 0x00000001);
+}
+
+int
+nv50_fifo_chid_ctor(struct nvkm_fifo *fifo, int nr)
+{
+	/* CHID 0 is unusable (some kind of PIO channel?), 127 is "channel invalid". */
+	return nvkm_chid_new(&nvkm_chan_event, &fifo->engine.subdev, nr, 1, nr - 2, &fifo->chid);
+}
+
+int
+nv50_fifo_chid_nr(struct nvkm_fifo *fifo)
+{
+	return 128;
+}
+
+static const struct nvkm_fifo_func
+nv50_fifo = {
+	.chid_nr = nv50_fifo_chid_nr,
+	.chid_ctor = nv50_fifo_chid_ctor,
+	.runl_ctor = nv04_fifo_runl_ctor,
+	.init = nv50_fifo_init,
+	.intr = nv04_fifo_intr,
+	.pause = nv04_fifo_pause,
+	.start = nv04_fifo_start,
+	.runl = &nv50_runl,
+	.engn = &nv50_engn,
+	.engn_sw = &nv50_engn_sw,
+	.cgrp = {{                           }, &nv04_cgrp },
+	.chan = {{ 0, 0, NV50_CHANNEL_GPFIFO }, &nv50_chan },
+};
+
+int
+nv50_fifo_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+	      struct nvkm_fifo **pfifo)
+{
+	return nvkm_fifo_new_(&nv50_fifo, device, type, inst, pfifo);
+}