From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c | 480 ++++++++++++++++++++++++ 1 file changed, 480 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c new file mode 100644 index 000000000..b7c9d6115 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c @@ -0,0 +1,480 @@ +/* + * 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 "chan.h" +#include "chid.h" +#include "cgrp.h" +#include "chid.h" +#include "runl.h" +#include "priv.h" + +#include +#include +#include + +#include + +const struct nvkm_event_func +nvkm_chan_event = { +}; + +void +nvkm_chan_cctx_bind(struct nvkm_chan *chan, struct nvkm_engn *engn, struct nvkm_cctx *cctx) +{ + struct nvkm_cgrp *cgrp = chan->cgrp; + struct nvkm_runl *runl = cgrp->runl; + struct nvkm_engine *engine = engn->engine; + + if (!engn->func->bind) + return; + + CHAN_TRACE(chan, "%sbind cctx %d[%s]", cctx ? "" : "un", engn->id, engine->subdev.name); + + /* Prevent any channel in channel group from being rescheduled, kick them + * off host and any engine(s) they're loaded on. + */ + if (cgrp->hw) + nvkm_runl_block(runl); + else + nvkm_chan_block(chan); + nvkm_chan_preempt(chan, true); + + /* Update context pointer. */ + engn->func->bind(engn, cctx, chan); + + /* Resume normal operation. */ + if (cgrp->hw) + nvkm_runl_allow(runl); + else + nvkm_chan_allow(chan); +} + +void +nvkm_chan_cctx_put(struct nvkm_chan *chan, struct nvkm_cctx **pcctx) +{ + struct nvkm_cctx *cctx = *pcctx; + + if (cctx) { + struct nvkm_engn *engn = cctx->vctx->ectx->engn; + + if (refcount_dec_and_mutex_lock(&cctx->refs, &chan->cgrp->mutex)) { + CHAN_TRACE(chan, "dtor cctx %d[%s]", engn->id, engn->engine->subdev.name); + nvkm_cgrp_vctx_put(chan->cgrp, &cctx->vctx); + list_del(&cctx->head); + kfree(cctx); + mutex_unlock(&chan->cgrp->mutex); + } + + *pcctx = NULL; + } +} + +int +nvkm_chan_cctx_get(struct nvkm_chan *chan, struct nvkm_engn *engn, struct nvkm_cctx **pcctx, + struct nvkm_client *client) +{ + struct nvkm_cgrp *cgrp = chan->cgrp; + struct nvkm_vctx *vctx; + struct nvkm_cctx *cctx; + int ret; + + /* Look for an existing channel context for this engine+VEID. */ + mutex_lock(&cgrp->mutex); + cctx = nvkm_list_find(cctx, &chan->cctxs, head, + cctx->vctx->ectx->engn == engn && cctx->vctx->vmm == chan->vmm); + if (cctx) { + refcount_inc(&cctx->refs); + *pcctx = cctx; + mutex_unlock(&chan->cgrp->mutex); + return 0; + } + + /* Nope - create a fresh one. But, sub-context first. */ + ret = nvkm_cgrp_vctx_get(cgrp, engn, chan, &vctx, client); + if (ret) { + CHAN_ERROR(chan, "vctx %d[%s]: %d", engn->id, engn->engine->subdev.name, ret); + goto done; + } + + /* Now, create the channel context - to track engine binding. */ + CHAN_TRACE(chan, "ctor cctx %d[%s]", engn->id, engn->engine->subdev.name); + if (!(cctx = *pcctx = kzalloc(sizeof(*cctx), GFP_KERNEL))) { + nvkm_cgrp_vctx_put(cgrp, &vctx); + ret = -ENOMEM; + goto done; + } + + cctx->vctx = vctx; + refcount_set(&cctx->refs, 1); + refcount_set(&cctx->uses, 0); + list_add_tail(&cctx->head, &chan->cctxs); +done: + mutex_unlock(&cgrp->mutex); + return ret; +} + +int +nvkm_chan_preempt_locked(struct nvkm_chan *chan, bool wait) +{ + struct nvkm_runl *runl = chan->cgrp->runl; + + CHAN_TRACE(chan, "preempt"); + chan->func->preempt(chan); + if (!wait) + return 0; + + return nvkm_runl_preempt_wait(runl); +} + +int +nvkm_chan_preempt(struct nvkm_chan *chan, bool wait) +{ + int ret; + + if (!chan->func->preempt) + return 0; + + mutex_lock(&chan->cgrp->runl->mutex); + ret = nvkm_chan_preempt_locked(chan, wait); + mutex_unlock(&chan->cgrp->runl->mutex); + return ret; +} + +void +nvkm_chan_remove_locked(struct nvkm_chan *chan) +{ + struct nvkm_cgrp *cgrp = chan->cgrp; + struct nvkm_runl *runl = cgrp->runl; + + if (list_empty(&chan->head)) + return; + + CHAN_TRACE(chan, "remove"); + if (!--cgrp->chan_nr) { + runl->cgrp_nr--; + list_del(&cgrp->head); + } + runl->chan_nr--; + list_del_init(&chan->head); + atomic_set(&runl->changed, 1); +} + +void +nvkm_chan_remove(struct nvkm_chan *chan, bool preempt) +{ + struct nvkm_runl *runl = chan->cgrp->runl; + + mutex_lock(&runl->mutex); + if (preempt && chan->func->preempt) + nvkm_chan_preempt_locked(chan, true); + nvkm_chan_remove_locked(chan); + nvkm_runl_update_locked(runl, true); + mutex_unlock(&runl->mutex); +} + +void +nvkm_chan_insert(struct nvkm_chan *chan) +{ + struct nvkm_cgrp *cgrp = chan->cgrp; + struct nvkm_runl *runl = cgrp->runl; + + mutex_lock(&runl->mutex); + if (WARN_ON(!list_empty(&chan->head))) { + mutex_unlock(&runl->mutex); + return; + } + + CHAN_TRACE(chan, "insert"); + list_add_tail(&chan->head, &cgrp->chans); + runl->chan_nr++; + if (!cgrp->chan_nr++) { + list_add_tail(&cgrp->head, &cgrp->runl->cgrps); + runl->cgrp_nr++; + } + atomic_set(&runl->changed, 1); + nvkm_runl_update_locked(runl, true); + mutex_unlock(&runl->mutex); +} + +static void +nvkm_chan_block_locked(struct nvkm_chan *chan) +{ + CHAN_TRACE(chan, "block %d", atomic_read(&chan->blocked)); + if (atomic_inc_return(&chan->blocked) == 1) + chan->func->stop(chan); +} + +void +nvkm_chan_error(struct nvkm_chan *chan, bool preempt) +{ + unsigned long flags; + + spin_lock_irqsave(&chan->lock, flags); + if (atomic_inc_return(&chan->errored) == 1) { + CHAN_ERROR(chan, "errored - disabling channel"); + nvkm_chan_block_locked(chan); + if (preempt) + chan->func->preempt(chan); + nvkm_event_ntfy(&chan->cgrp->runl->chid->event, chan->id, NVKM_CHAN_EVENT_ERRORED); + } + spin_unlock_irqrestore(&chan->lock, flags); +} + +void +nvkm_chan_block(struct nvkm_chan *chan) +{ + spin_lock_irq(&chan->lock); + nvkm_chan_block_locked(chan); + spin_unlock_irq(&chan->lock); +} + +void +nvkm_chan_allow(struct nvkm_chan *chan) +{ + spin_lock_irq(&chan->lock); + CHAN_TRACE(chan, "allow %d", atomic_read(&chan->blocked)); + if (atomic_dec_and_test(&chan->blocked)) + chan->func->start(chan); + spin_unlock_irq(&chan->lock); +} + +void +nvkm_chan_del(struct nvkm_chan **pchan) +{ + struct nvkm_chan *chan = *pchan; + + if (!chan) + return; + + if (chan->func->ramfc->clear) + chan->func->ramfc->clear(chan); + + nvkm_ramht_del(&chan->ramht); + nvkm_gpuobj_del(&chan->pgd); + nvkm_gpuobj_del(&chan->eng); + nvkm_gpuobj_del(&chan->cache); + nvkm_gpuobj_del(&chan->ramfc); + + nvkm_memory_unref(&chan->userd.mem); + + if (chan->cgrp) { + nvkm_chid_put(chan->cgrp->runl->chid, chan->id, &chan->cgrp->lock); + nvkm_cgrp_unref(&chan->cgrp); + } + + if (chan->vmm) { + nvkm_vmm_part(chan->vmm, chan->inst->memory); + nvkm_vmm_unref(&chan->vmm); + } + + nvkm_gpuobj_del(&chan->push); + nvkm_gpuobj_del(&chan->inst); + kfree(chan); +} + +void +nvkm_chan_put(struct nvkm_chan **pchan, unsigned long irqflags) +{ + struct nvkm_chan *chan = *pchan; + + if (!chan) + return; + + *pchan = NULL; + spin_unlock_irqrestore(&chan->cgrp->lock, irqflags); +} + +struct nvkm_chan * +nvkm_chan_get_inst(struct nvkm_engine *engine, u64 inst, unsigned long *pirqflags) +{ + struct nvkm_fifo *fifo = engine->subdev.device->fifo; + struct nvkm_runl *runl; + struct nvkm_engn *engn; + struct nvkm_chan *chan; + + nvkm_runl_foreach(runl, fifo) { + nvkm_runl_foreach_engn(engn, runl) { + if (engine == &fifo->engine || engn->engine == engine) { + chan = nvkm_runl_chan_get_inst(runl, inst, pirqflags); + if (chan || engn->engine == engine) + return chan; + } + } + } + + return NULL; +} + +struct nvkm_chan * +nvkm_chan_get_chid(struct nvkm_engine *engine, int id, unsigned long *pirqflags) +{ + struct nvkm_fifo *fifo = engine->subdev.device->fifo; + struct nvkm_runl *runl; + struct nvkm_engn *engn; + + nvkm_runl_foreach(runl, fifo) { + nvkm_runl_foreach_engn(engn, runl) { + if (fifo->chid || engn->engine == engine) + return nvkm_runl_chan_get_chid(runl, id, pirqflags); + } + } + + return NULL; +} + +int +nvkm_chan_new_(const struct nvkm_chan_func *func, struct nvkm_runl *runl, int runq, + struct nvkm_cgrp *cgrp, const char *name, bool priv, u32 devm, struct nvkm_vmm *vmm, + struct nvkm_dmaobj *dmaobj, u64 offset, u64 length, + struct nvkm_memory *userd, u64 ouserd, struct nvkm_chan **pchan) +{ + struct nvkm_fifo *fifo = runl->fifo; + struct nvkm_device *device = fifo->engine.subdev.device; + struct nvkm_chan *chan; + int ret; + + /* Validate arguments against class requirements. */ + if ((runq && runq >= runl->func->runqs) || + (!func->inst->vmm != !vmm) || + ((func->userd->bar < 0) == !userd) || + (!func->ramfc->ctxdma != !dmaobj) || + ((func->ramfc->devm < devm) && devm != BIT(0)) || + (!func->ramfc->priv && priv)) { + RUNL_DEBUG(runl, "args runq:%d:%d vmm:%d:%p userd:%d:%p " + "push:%d:%p devm:%08x:%08x priv:%d:%d", + runl->func->runqs, runq, func->inst->vmm, vmm, + func->userd->bar < 0, userd, func->ramfc->ctxdma, dmaobj, + func->ramfc->devm, devm, func->ramfc->priv, priv); + return -EINVAL; + } + + if (!(chan = *pchan = kzalloc(sizeof(*chan), GFP_KERNEL))) + return -ENOMEM; + + chan->func = func; + strscpy(chan->name, name, sizeof(chan->name)); + chan->runq = runq; + chan->id = -1; + spin_lock_init(&chan->lock); + atomic_set(&chan->blocked, 1); + atomic_set(&chan->errored, 0); + INIT_LIST_HEAD(&chan->cctxs); + INIT_LIST_HEAD(&chan->head); + + /* Join channel group. + * + * GK110 and newer support channel groups (aka TSGs), where individual channels + * share a timeslice, and, engine context(s). + * + * As such, engine contexts are tracked in nvkm_cgrp and we need them even when + * channels aren't in an API channel group, and on HW that doesn't support TSGs. + */ + if (!cgrp) { + ret = nvkm_cgrp_new(runl, chan->name, vmm, fifo->func->cgrp.force, &chan->cgrp); + if (ret) { + RUNL_DEBUG(runl, "cgrp %d", ret); + return ret; + } + + cgrp = chan->cgrp; + } else { + if (cgrp->runl != runl || cgrp->vmm != vmm) { + RUNL_DEBUG(runl, "cgrp %d %d", cgrp->runl != runl, cgrp->vmm != vmm); + return -EINVAL; + } + + chan->cgrp = nvkm_cgrp_ref(cgrp); + } + + /* Allocate instance block. */ + ret = nvkm_gpuobj_new(device, func->inst->size, 0x1000, func->inst->zero, NULL, + &chan->inst); + if (ret) { + RUNL_DEBUG(runl, "inst %d", ret); + return ret; + } + + /* Initialise virtual address-space. */ + if (func->inst->vmm) { + if (WARN_ON(vmm->mmu != device->mmu)) + return -EINVAL; + + ret = nvkm_vmm_join(vmm, chan->inst->memory); + if (ret) { + RUNL_DEBUG(runl, "vmm %d", ret); + return ret; + } + + chan->vmm = nvkm_vmm_ref(vmm); + } + + /* Allocate HW ctxdma for push buffer. */ + if (func->ramfc->ctxdma) { + ret = nvkm_object_bind(&dmaobj->object, chan->inst, -16, &chan->push); + if (ret) { + RUNL_DEBUG(runl, "bind %d", ret); + return ret; + } + } + + /* Allocate channel ID. */ + chan->id = nvkm_chid_get(runl->chid, chan); + if (chan->id < 0) { + RUNL_ERROR(runl, "!chids"); + return -ENOSPC; + } + + if (cgrp->id < 0) + cgrp->id = chan->id; + + /* Initialise USERD. */ + if (func->userd->bar < 0) { + if (ouserd + chan->func->userd->size >= nvkm_memory_size(userd)) { + RUNL_DEBUG(runl, "ouserd %llx", ouserd); + return -EINVAL; + } + + ret = nvkm_memory_kmap(userd, &chan->userd.mem); + if (ret) { + RUNL_DEBUG(runl, "userd %d", ret); + return ret; + } + + chan->userd.base = ouserd; + } else { + chan->userd.mem = nvkm_memory_ref(fifo->userd.mem); + chan->userd.base = chan->id * chan->func->userd->size; + } + + if (chan->func->userd->clear) + chan->func->userd->clear(chan); + + /* Initialise RAMFC. */ + ret = chan->func->ramfc->write(chan, offset, length, devm, priv); + if (ret) { + RUNL_DEBUG(runl, "ramfc %d", ret); + return ret; + } + + return 0; +} -- cgit v1.2.3