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/amd/amdgpu/amdgpu_ih.c | 296 +++++++++++++++++++++++++++++++++ 1 file changed, 296 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c new file mode 100644 index 000000000..1d5af5033 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c @@ -0,0 +1,296 @@ +/* + * Copyright 2014 Advanced Micro Devices, 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. + * + */ + +#include + +#include "amdgpu.h" +#include "amdgpu_ih.h" + +/** + * amdgpu_ih_ring_init - initialize the IH state + * + * @adev: amdgpu_device pointer + * @ih: ih ring to initialize + * @ring_size: ring size to allocate + * @use_bus_addr: true when we can use dma_alloc_coherent + * + * Initializes the IH state and allocates a buffer + * for the IH ring buffer. + * Returns 0 for success, errors for failure. + */ +int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih, + unsigned ring_size, bool use_bus_addr) +{ + u32 rb_bufsz; + int r; + + /* Align ring size */ + rb_bufsz = order_base_2(ring_size / 4); + ring_size = (1 << rb_bufsz) * 4; + ih->ring_size = ring_size; + ih->ptr_mask = ih->ring_size - 1; + ih->rptr = 0; + ih->use_bus_addr = use_bus_addr; + + if (use_bus_addr) { + dma_addr_t dma_addr; + + if (ih->ring) + return 0; + + /* add 8 bytes for the rptr/wptr shadows and + * add them to the end of the ring allocation. + */ + ih->ring = dma_alloc_coherent(adev->dev, ih->ring_size + 8, + &dma_addr, GFP_KERNEL); + if (ih->ring == NULL) + return -ENOMEM; + + ih->gpu_addr = dma_addr; + ih->wptr_addr = dma_addr + ih->ring_size; + ih->wptr_cpu = &ih->ring[ih->ring_size / 4]; + ih->rptr_addr = dma_addr + ih->ring_size + 4; + ih->rptr_cpu = &ih->ring[(ih->ring_size / 4) + 1]; + } else { + unsigned wptr_offs, rptr_offs; + + r = amdgpu_device_wb_get(adev, &wptr_offs); + if (r) + return r; + + r = amdgpu_device_wb_get(adev, &rptr_offs); + if (r) { + amdgpu_device_wb_free(adev, wptr_offs); + return r; + } + + r = amdgpu_bo_create_kernel(adev, ih->ring_size, PAGE_SIZE, + AMDGPU_GEM_DOMAIN_GTT, + &ih->ring_obj, &ih->gpu_addr, + (void **)&ih->ring); + if (r) { + amdgpu_device_wb_free(adev, rptr_offs); + amdgpu_device_wb_free(adev, wptr_offs); + return r; + } + + ih->wptr_addr = adev->wb.gpu_addr + wptr_offs * 4; + ih->wptr_cpu = &adev->wb.wb[wptr_offs]; + ih->rptr_addr = adev->wb.gpu_addr + rptr_offs * 4; + ih->rptr_cpu = &adev->wb.wb[rptr_offs]; + } + + init_waitqueue_head(&ih->wait_process); + return 0; +} + +/** + * amdgpu_ih_ring_fini - tear down the IH state + * + * @adev: amdgpu_device pointer + * @ih: ih ring to tear down + * + * Tears down the IH state and frees buffer + * used for the IH ring buffer. + */ +void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) +{ + + if (!ih->ring) + return; + + if (ih->use_bus_addr) { + + /* add 8 bytes for the rptr/wptr shadows and + * add them to the end of the ring allocation. + */ + dma_free_coherent(adev->dev, ih->ring_size + 8, + (void *)ih->ring, ih->gpu_addr); + ih->ring = NULL; + } else { + amdgpu_bo_free_kernel(&ih->ring_obj, &ih->gpu_addr, + (void **)&ih->ring); + amdgpu_device_wb_free(adev, (ih->wptr_addr - ih->gpu_addr) / 4); + amdgpu_device_wb_free(adev, (ih->rptr_addr - ih->gpu_addr) / 4); + } +} + +/** + * amdgpu_ih_ring_write - write IV to the ring buffer + * + * @ih: ih ring to write to + * @iv: the iv to write + * @num_dw: size of the iv in dw + * + * Writes an IV to the ring buffer using the CPU and increment the wptr. + * Used for testing and delegating IVs to a software ring. + */ +void amdgpu_ih_ring_write(struct amdgpu_ih_ring *ih, const uint32_t *iv, + unsigned int num_dw) +{ + uint32_t wptr = le32_to_cpu(*ih->wptr_cpu) >> 2; + unsigned int i; + + for (i = 0; i < num_dw; ++i) + ih->ring[wptr++] = cpu_to_le32(iv[i]); + + wptr <<= 2; + wptr &= ih->ptr_mask; + + /* Only commit the new wptr if we don't overflow */ + if (wptr != READ_ONCE(ih->rptr)) { + wmb(); + WRITE_ONCE(*ih->wptr_cpu, cpu_to_le32(wptr)); + } +} + +/** + * amdgpu_ih_wait_on_checkpoint_process_ts - wait to process IVs up to checkpoint + * + * @adev: amdgpu_device pointer + * @ih: ih ring to process + * + * Used to ensure ring has processed IVs up to the checkpoint write pointer. + */ +int amdgpu_ih_wait_on_checkpoint_process_ts(struct amdgpu_device *adev, + struct amdgpu_ih_ring *ih) +{ + uint32_t checkpoint_wptr; + uint64_t checkpoint_ts; + long timeout = HZ; + + if (!ih->enabled || adev->shutdown) + return -ENODEV; + + checkpoint_wptr = amdgpu_ih_get_wptr(adev, ih); + /* Order wptr with ring data. */ + rmb(); + checkpoint_ts = amdgpu_ih_decode_iv_ts(adev, ih, checkpoint_wptr, -1); + + return wait_event_interruptible_timeout(ih->wait_process, + amdgpu_ih_ts_after(checkpoint_ts, ih->processed_timestamp) || + ih->rptr == amdgpu_ih_get_wptr(adev, ih), timeout); +} + +/** + * amdgpu_ih_process - interrupt handler + * + * @adev: amdgpu_device pointer + * @ih: ih ring to process + * + * Interrupt hander (VI), walk the IH ring. + * Returns irq process return code. + */ +int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) +{ + unsigned int count; + u32 wptr; + + if (!ih->enabled || adev->shutdown) + return IRQ_NONE; + + wptr = amdgpu_ih_get_wptr(adev, ih); + +restart_ih: + count = AMDGPU_IH_MAX_NUM_IVS; + DRM_DEBUG("%s: rptr %d, wptr %d\n", __func__, ih->rptr, wptr); + + /* Order reading of wptr vs. reading of IH ring data */ + rmb(); + + while (ih->rptr != wptr && --count) { + amdgpu_irq_dispatch(adev, ih); + ih->rptr &= ih->ptr_mask; + } + + amdgpu_ih_set_rptr(adev, ih); + wake_up_all(&ih->wait_process); + + /* make sure wptr hasn't changed while processing */ + wptr = amdgpu_ih_get_wptr(adev, ih); + if (wptr != ih->rptr) + goto restart_ih; + + return IRQ_HANDLED; +} + +/** + * amdgpu_ih_decode_iv_helper - decode an interrupt vector + * + * @adev: amdgpu_device pointer + * @ih: ih ring to process + * @entry: IV entry + * + * Decodes the interrupt vector at the current rptr + * position and also advance the position for Vega10 + * and later GPUs. + */ +void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev, + struct amdgpu_ih_ring *ih, + struct amdgpu_iv_entry *entry) +{ + /* wptr/rptr are in bytes! */ + u32 ring_index = ih->rptr >> 2; + uint32_t dw[8]; + + dw[0] = le32_to_cpu(ih->ring[ring_index + 0]); + dw[1] = le32_to_cpu(ih->ring[ring_index + 1]); + dw[2] = le32_to_cpu(ih->ring[ring_index + 2]); + dw[3] = le32_to_cpu(ih->ring[ring_index + 3]); + dw[4] = le32_to_cpu(ih->ring[ring_index + 4]); + dw[5] = le32_to_cpu(ih->ring[ring_index + 5]); + dw[6] = le32_to_cpu(ih->ring[ring_index + 6]); + dw[7] = le32_to_cpu(ih->ring[ring_index + 7]); + + entry->client_id = dw[0] & 0xff; + entry->src_id = (dw[0] >> 8) & 0xff; + entry->ring_id = (dw[0] >> 16) & 0xff; + entry->vmid = (dw[0] >> 24) & 0xf; + entry->vmid_src = (dw[0] >> 31); + entry->timestamp = dw[1] | ((u64)(dw[2] & 0xffff) << 32); + entry->timestamp_src = dw[2] >> 31; + entry->pasid = dw[3] & 0xffff; + entry->pasid_src = dw[3] >> 31; + entry->src_data[0] = dw[4]; + entry->src_data[1] = dw[5]; + entry->src_data[2] = dw[6]; + entry->src_data[3] = dw[7]; + + /* wptr/rptr are in bytes! */ + ih->rptr += 32; +} + +uint64_t amdgpu_ih_decode_iv_ts_helper(struct amdgpu_ih_ring *ih, u32 rptr, + signed int offset) +{ + uint32_t iv_size = 32; + uint32_t ring_index; + uint32_t dw1, dw2; + + rptr += iv_size * offset; + ring_index = (rptr & ih->ptr_mask) >> 2; + + dw1 = le32_to_cpu(ih->ring[ring_index + 1]); + dw2 = le32_to_cpu(ih->ring[ring_index + 2]); + return dw1 | ((u64)(dw2 & 0xffff) << 32); +} -- cgit v1.2.3