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/falcon/cmdq.c | 214 +++++++++++++++++++++++++++++ 1 file changed, 214 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/nvkm/falcon/cmdq.c (limited to 'drivers/gpu/drm/nouveau/nvkm/falcon/cmdq.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/falcon/cmdq.c b/drivers/gpu/drm/nouveau/nvkm/falcon/cmdq.c new file mode 100644 index 000000000..211ebe7af --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/falcon/cmdq.c @@ -0,0 +1,214 @@ +/* + * Copyright (c) 2017, NVIDIA CORPORATION. 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 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. + * + */ +#include "qmgr.h" + +static bool +nvkm_falcon_cmdq_has_room(struct nvkm_falcon_cmdq *cmdq, u32 size, bool *rewind) +{ + u32 head = nvkm_falcon_rd32(cmdq->qmgr->falcon, cmdq->head_reg); + u32 tail = nvkm_falcon_rd32(cmdq->qmgr->falcon, cmdq->tail_reg); + u32 free; + + size = ALIGN(size, QUEUE_ALIGNMENT); + + if (head >= tail) { + free = cmdq->offset + cmdq->size - head; + free -= HDR_SIZE; + + if (size > free) { + *rewind = true; + head = cmdq->offset; + } + } + + if (head < tail) + free = tail - head - 1; + + return size <= free; +} + +static void +nvkm_falcon_cmdq_push(struct nvkm_falcon_cmdq *cmdq, void *data, u32 size) +{ + struct nvkm_falcon *falcon = cmdq->qmgr->falcon; + nvkm_falcon_pio_wr(falcon, data, 0, 0, DMEM, cmdq->position, size, 0, false); + cmdq->position += ALIGN(size, QUEUE_ALIGNMENT); +} + +static void +nvkm_falcon_cmdq_rewind(struct nvkm_falcon_cmdq *cmdq) +{ + struct nvfw_falcon_cmd cmd; + + cmd.unit_id = NV_FALCON_CMD_UNIT_ID_REWIND; + cmd.size = sizeof(cmd); + nvkm_falcon_cmdq_push(cmdq, &cmd, cmd.size); + + cmdq->position = cmdq->offset; +} + +static int +nvkm_falcon_cmdq_open(struct nvkm_falcon_cmdq *cmdq, u32 size) +{ + struct nvkm_falcon *falcon = cmdq->qmgr->falcon; + bool rewind = false; + + mutex_lock(&cmdq->mutex); + + if (!nvkm_falcon_cmdq_has_room(cmdq, size, &rewind)) { + FLCNQ_DBG(cmdq, "queue full"); + mutex_unlock(&cmdq->mutex); + return -EAGAIN; + } + + cmdq->position = nvkm_falcon_rd32(falcon, cmdq->head_reg); + + if (rewind) + nvkm_falcon_cmdq_rewind(cmdq); + + return 0; +} + +static void +nvkm_falcon_cmdq_close(struct nvkm_falcon_cmdq *cmdq) +{ + nvkm_falcon_wr32(cmdq->qmgr->falcon, cmdq->head_reg, cmdq->position); + mutex_unlock(&cmdq->mutex); +} + +static int +nvkm_falcon_cmdq_write(struct nvkm_falcon_cmdq *cmdq, struct nvfw_falcon_cmd *cmd) +{ + static unsigned timeout = 2000; + unsigned long end_jiffies = jiffies + msecs_to_jiffies(timeout); + int ret = -EAGAIN; + + while (ret == -EAGAIN && time_before(jiffies, end_jiffies)) + ret = nvkm_falcon_cmdq_open(cmdq, cmd->size); + if (ret) { + FLCNQ_ERR(cmdq, "timeout waiting for queue space"); + return ret; + } + + nvkm_falcon_cmdq_push(cmdq, cmd, cmd->size); + nvkm_falcon_cmdq_close(cmdq); + return ret; +} + +/* specifies that we want to know the command status in the answer message */ +#define CMD_FLAGS_STATUS BIT(0) +/* specifies that we want an interrupt when the answer message is queued */ +#define CMD_FLAGS_INTR BIT(1) + +int +nvkm_falcon_cmdq_send(struct nvkm_falcon_cmdq *cmdq, struct nvfw_falcon_cmd *cmd, + nvkm_falcon_qmgr_callback cb, void *priv, + unsigned long timeout) +{ + struct nvkm_falcon_qmgr_seq *seq; + int ret; + + if (!wait_for_completion_timeout(&cmdq->ready, + msecs_to_jiffies(1000))) { + FLCNQ_ERR(cmdq, "timeout waiting for queue ready"); + return -ETIMEDOUT; + } + + seq = nvkm_falcon_qmgr_seq_acquire(cmdq->qmgr); + if (IS_ERR(seq)) + return PTR_ERR(seq); + + cmd->seq_id = seq->id; + cmd->ctrl_flags = CMD_FLAGS_STATUS | CMD_FLAGS_INTR; + + seq->state = SEQ_STATE_USED; + seq->async = !timeout; + seq->callback = cb; + seq->priv = priv; + + ret = nvkm_falcon_cmdq_write(cmdq, cmd); + if (ret) { + seq->state = SEQ_STATE_PENDING; + nvkm_falcon_qmgr_seq_release(cmdq->qmgr, seq); + return ret; + } + + if (!seq->async) { + if (!wait_for_completion_timeout(&seq->done, timeout)) { + FLCNQ_ERR(cmdq, "timeout waiting for reply"); + return -ETIMEDOUT; + } + ret = seq->result; + nvkm_falcon_qmgr_seq_release(cmdq->qmgr, seq); + } + + return ret; +} + +void +nvkm_falcon_cmdq_fini(struct nvkm_falcon_cmdq *cmdq) +{ + reinit_completion(&cmdq->ready); +} + +void +nvkm_falcon_cmdq_init(struct nvkm_falcon_cmdq *cmdq, + u32 index, u32 offset, u32 size) +{ + const struct nvkm_falcon_func *func = cmdq->qmgr->falcon->func; + + cmdq->head_reg = func->cmdq.head + index * func->cmdq.stride; + cmdq->tail_reg = func->cmdq.tail + index * func->cmdq.stride; + cmdq->offset = offset; + cmdq->size = size; + complete_all(&cmdq->ready); + + FLCNQ_DBG(cmdq, "initialised @ index %d offset 0x%08x size 0x%08x", + index, cmdq->offset, cmdq->size); +} + +void +nvkm_falcon_cmdq_del(struct nvkm_falcon_cmdq **pcmdq) +{ + struct nvkm_falcon_cmdq *cmdq = *pcmdq; + if (cmdq) { + kfree(*pcmdq); + *pcmdq = NULL; + } +} + +int +nvkm_falcon_cmdq_new(struct nvkm_falcon_qmgr *qmgr, const char *name, + struct nvkm_falcon_cmdq **pcmdq) +{ + struct nvkm_falcon_cmdq *cmdq = *pcmdq; + + if (!(cmdq = *pcmdq = kzalloc(sizeof(*cmdq), GFP_KERNEL))) + return -ENOMEM; + + cmdq->qmgr = qmgr; + cmdq->name = name; + mutex_init(&cmdq->mutex); + init_completion(&cmdq->ready); + return 0; +} -- cgit v1.2.3