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/net/wireless/ath/ath11k/dbring.c | 399 +++++++++++++++++++++++++++++++ 1 file changed, 399 insertions(+) create mode 100644 drivers/net/wireless/ath/ath11k/dbring.c (limited to 'drivers/net/wireless/ath/ath11k/dbring.c') diff --git a/drivers/net/wireless/ath/ath11k/dbring.c b/drivers/net/wireless/ath/ath11k/dbring.c new file mode 100644 index 000000000..2107ec05d --- /dev/null +++ b/drivers/net/wireless/ath/ath11k/dbring.c @@ -0,0 +1,399 @@ +// SPDX-License-Identifier: BSD-3-Clause-Clear +/* + * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved. + */ + +#include "core.h" +#include "debug.h" + +#define ATH11K_DB_MAGIC_VALUE 0xdeadbeaf + +int ath11k_dbring_validate_buffer(struct ath11k *ar, void *buffer, u32 size) +{ + u32 *temp; + int idx; + + size = size >> 2; + + for (idx = 0, temp = buffer; idx < size; idx++, temp++) { + if (*temp == ATH11K_DB_MAGIC_VALUE) + return -EINVAL; + } + + return 0; +} + +static void ath11k_dbring_fill_magic_value(struct ath11k *ar, + void *buffer, u32 size) +{ + u32 *temp; + int idx; + + size = size >> 2; + + for (idx = 0, temp = buffer; idx < size; idx++, temp++) + *temp++ = ATH11K_DB_MAGIC_VALUE; +} + +static int ath11k_dbring_bufs_replenish(struct ath11k *ar, + struct ath11k_dbring *ring, + struct ath11k_dbring_element *buff, + enum wmi_direct_buffer_module id) +{ + struct ath11k_base *ab = ar->ab; + struct hal_srng *srng; + dma_addr_t paddr; + void *ptr_aligned, *ptr_unaligned, *desc; + int ret; + int buf_id; + u32 cookie; + + srng = &ab->hal.srng_list[ring->refill_srng.ring_id]; + + lockdep_assert_held(&srng->lock); + + ath11k_hal_srng_access_begin(ab, srng); + + ptr_unaligned = buff->payload; + ptr_aligned = PTR_ALIGN(ptr_unaligned, ring->buf_align); + ath11k_dbring_fill_magic_value(ar, ptr_aligned, ring->buf_sz); + paddr = dma_map_single(ab->dev, ptr_aligned, ring->buf_sz, + DMA_FROM_DEVICE); + + ret = dma_mapping_error(ab->dev, paddr); + if (ret) + goto err; + + spin_lock_bh(&ring->idr_lock); + buf_id = idr_alloc(&ring->bufs_idr, buff, 0, ring->bufs_max, GFP_ATOMIC); + spin_unlock_bh(&ring->idr_lock); + if (buf_id < 0) { + ret = -ENOBUFS; + goto err_dma_unmap; + } + + desc = ath11k_hal_srng_src_get_next_entry(ab, srng); + if (!desc) { + ret = -ENOENT; + goto err_idr_remove; + } + + buff->paddr = paddr; + + cookie = FIELD_PREP(DP_RXDMA_BUF_COOKIE_PDEV_ID, ar->pdev_idx) | + FIELD_PREP(DP_RXDMA_BUF_COOKIE_BUF_ID, buf_id); + + ath11k_hal_rx_buf_addr_info_set(desc, paddr, cookie, 0); + + ath11k_debugfs_add_dbring_entry(ar, id, ATH11K_DBG_DBR_EVENT_REPLENISH, srng); + ath11k_hal_srng_access_end(ab, srng); + + return 0; + +err_idr_remove: + spin_lock_bh(&ring->idr_lock); + idr_remove(&ring->bufs_idr, buf_id); + spin_unlock_bh(&ring->idr_lock); +err_dma_unmap: + dma_unmap_single(ab->dev, paddr, ring->buf_sz, + DMA_FROM_DEVICE); +err: + ath11k_hal_srng_access_end(ab, srng); + return ret; +} + +static int ath11k_dbring_fill_bufs(struct ath11k *ar, + struct ath11k_dbring *ring, + enum wmi_direct_buffer_module id) +{ + struct ath11k_dbring_element *buff; + struct hal_srng *srng; + int num_remain, req_entries, num_free; + u32 align; + int size, ret; + + srng = &ar->ab->hal.srng_list[ring->refill_srng.ring_id]; + + spin_lock_bh(&srng->lock); + + num_free = ath11k_hal_srng_src_num_free(ar->ab, srng, true); + req_entries = min(num_free, ring->bufs_max); + num_remain = req_entries; + align = ring->buf_align; + size = ring->buf_sz + align - 1; + + while (num_remain > 0) { + buff = kzalloc(sizeof(*buff), GFP_ATOMIC); + if (!buff) + break; + + buff->payload = kzalloc(size, GFP_ATOMIC); + if (!buff->payload) { + kfree(buff); + break; + } + ret = ath11k_dbring_bufs_replenish(ar, ring, buff, id); + if (ret) { + ath11k_warn(ar->ab, "failed to replenish db ring num_remain %d req_ent %d\n", + num_remain, req_entries); + kfree(buff->payload); + kfree(buff); + break; + } + num_remain--; + } + + spin_unlock_bh(&srng->lock); + + return num_remain; +} + +int ath11k_dbring_wmi_cfg_setup(struct ath11k *ar, + struct ath11k_dbring *ring, + enum wmi_direct_buffer_module id) +{ + struct ath11k_wmi_pdev_dma_ring_cfg_req_cmd param = {0}; + int ret; + + if (id >= WMI_DIRECT_BUF_MAX) + return -EINVAL; + + param.pdev_id = DP_SW2HW_MACID(ring->pdev_id); + param.module_id = id; + param.base_paddr_lo = lower_32_bits(ring->refill_srng.paddr); + param.base_paddr_hi = upper_32_bits(ring->refill_srng.paddr); + param.head_idx_paddr_lo = lower_32_bits(ring->hp_addr); + param.head_idx_paddr_hi = upper_32_bits(ring->hp_addr); + param.tail_idx_paddr_lo = lower_32_bits(ring->tp_addr); + param.tail_idx_paddr_hi = upper_32_bits(ring->tp_addr); + param.num_elems = ring->bufs_max; + param.buf_size = ring->buf_sz; + param.num_resp_per_event = ring->num_resp_per_event; + param.event_timeout_ms = ring->event_timeout_ms; + + ret = ath11k_wmi_pdev_dma_ring_cfg(ar, ¶m); + if (ret) { + ath11k_warn(ar->ab, "failed to setup db ring cfg\n"); + return ret; + } + + return 0; +} + +int ath11k_dbring_set_cfg(struct ath11k *ar, struct ath11k_dbring *ring, + u32 num_resp_per_event, u32 event_timeout_ms, + int (*handler)(struct ath11k *, + struct ath11k_dbring_data *)) +{ + if (WARN_ON(!ring)) + return -EINVAL; + + ring->num_resp_per_event = num_resp_per_event; + ring->event_timeout_ms = event_timeout_ms; + ring->handler = handler; + + return 0; +} + +int ath11k_dbring_buf_setup(struct ath11k *ar, + struct ath11k_dbring *ring, + struct ath11k_dbring_cap *db_cap) +{ + struct ath11k_base *ab = ar->ab; + struct hal_srng *srng; + int ret; + + srng = &ab->hal.srng_list[ring->refill_srng.ring_id]; + ring->bufs_max = ring->refill_srng.size / + ath11k_hal_srng_get_entrysize(ab, HAL_RXDMA_DIR_BUF); + + ring->buf_sz = db_cap->min_buf_sz; + ring->buf_align = db_cap->min_buf_align; + ring->pdev_id = db_cap->pdev_id; + ring->hp_addr = ath11k_hal_srng_get_hp_addr(ar->ab, srng); + ring->tp_addr = ath11k_hal_srng_get_tp_addr(ar->ab, srng); + + ret = ath11k_dbring_fill_bufs(ar, ring, db_cap->id); + + return ret; +} + +int ath11k_dbring_srng_setup(struct ath11k *ar, struct ath11k_dbring *ring, + int ring_num, int num_entries) +{ + int ret; + + ret = ath11k_dp_srng_setup(ar->ab, &ring->refill_srng, HAL_RXDMA_DIR_BUF, + ring_num, ar->pdev_idx, num_entries); + if (ret < 0) { + ath11k_warn(ar->ab, "failed to setup srng: %d ring_id %d\n", + ret, ring_num); + goto err; + } + + return 0; +err: + ath11k_dp_srng_cleanup(ar->ab, &ring->refill_srng); + return ret; +} + +int ath11k_dbring_get_cap(struct ath11k_base *ab, + u8 pdev_idx, + enum wmi_direct_buffer_module id, + struct ath11k_dbring_cap *db_cap) +{ + int i; + + if (!ab->num_db_cap || !ab->db_caps) + return -ENOENT; + + if (id >= WMI_DIRECT_BUF_MAX) + return -EINVAL; + + for (i = 0; i < ab->num_db_cap; i++) { + if (pdev_idx == ab->db_caps[i].pdev_id && + id == ab->db_caps[i].id) { + *db_cap = ab->db_caps[i]; + + return 0; + } + } + + return -ENOENT; +} + +int ath11k_dbring_buffer_release_event(struct ath11k_base *ab, + struct ath11k_dbring_buf_release_event *ev) +{ + struct ath11k_dbring *ring; + struct hal_srng *srng; + struct ath11k *ar; + struct ath11k_dbring_element *buff; + struct ath11k_dbring_data handler_data; + struct ath11k_buffer_addr desc; + u8 *vaddr_unalign; + u32 num_entry, num_buff_reaped; + u8 pdev_idx, rbm, module_id; + u32 cookie; + int buf_id; + int size; + dma_addr_t paddr; + int ret = 0; + + pdev_idx = ev->fixed.pdev_id; + module_id = ev->fixed.module_id; + + if (pdev_idx >= ab->num_radios) { + ath11k_warn(ab, "Invalid pdev id %d\n", pdev_idx); + return -EINVAL; + } + + if (ev->fixed.num_buf_release_entry != + ev->fixed.num_meta_data_entry) { + ath11k_warn(ab, "Buffer entry %d mismatch meta entry %d\n", + ev->fixed.num_buf_release_entry, + ev->fixed.num_meta_data_entry); + return -EINVAL; + } + + ar = ab->pdevs[pdev_idx].ar; + + rcu_read_lock(); + if (!rcu_dereference(ab->pdevs_active[pdev_idx])) { + ret = -EINVAL; + goto rcu_unlock; + } + + switch (ev->fixed.module_id) { + case WMI_DIRECT_BUF_SPECTRAL: + ring = ath11k_spectral_get_dbring(ar); + break; + default: + ring = NULL; + ath11k_warn(ab, "Recv dma buffer release ev on unsupp module %d\n", + ev->fixed.module_id); + break; + } + + if (!ring) { + ret = -EINVAL; + goto rcu_unlock; + } + + srng = &ab->hal.srng_list[ring->refill_srng.ring_id]; + num_entry = ev->fixed.num_buf_release_entry; + size = ring->buf_sz + ring->buf_align - 1; + num_buff_reaped = 0; + + spin_lock_bh(&srng->lock); + + while (num_buff_reaped < num_entry) { + desc.info0 = ev->buf_entry[num_buff_reaped].paddr_lo; + desc.info1 = ev->buf_entry[num_buff_reaped].paddr_hi; + handler_data.meta = ev->meta_data[num_buff_reaped]; + + num_buff_reaped++; + + ath11k_hal_rx_buf_addr_info_get(&desc, &paddr, &cookie, &rbm); + + buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID, cookie); + + spin_lock_bh(&ring->idr_lock); + buff = idr_find(&ring->bufs_idr, buf_id); + if (!buff) { + spin_unlock_bh(&ring->idr_lock); + continue; + } + idr_remove(&ring->bufs_idr, buf_id); + spin_unlock_bh(&ring->idr_lock); + + dma_unmap_single(ab->dev, buff->paddr, ring->buf_sz, + DMA_FROM_DEVICE); + + ath11k_debugfs_add_dbring_entry(ar, module_id, + ATH11K_DBG_DBR_EVENT_RX, srng); + + if (ring->handler) { + vaddr_unalign = buff->payload; + handler_data.data = PTR_ALIGN(vaddr_unalign, + ring->buf_align); + handler_data.data_sz = ring->buf_sz; + + ring->handler(ar, &handler_data); + } + + buff->paddr = 0; + memset(buff->payload, 0, size); + ath11k_dbring_bufs_replenish(ar, ring, buff, module_id); + } + + spin_unlock_bh(&srng->lock); + +rcu_unlock: + rcu_read_unlock(); + + return ret; +} + +void ath11k_dbring_srng_cleanup(struct ath11k *ar, struct ath11k_dbring *ring) +{ + ath11k_dp_srng_cleanup(ar->ab, &ring->refill_srng); +} + +void ath11k_dbring_buf_cleanup(struct ath11k *ar, struct ath11k_dbring *ring) +{ + struct ath11k_dbring_element *buff; + int buf_id; + + spin_lock_bh(&ring->idr_lock); + idr_for_each_entry(&ring->bufs_idr, buff, buf_id) { + idr_remove(&ring->bufs_idr, buf_id); + dma_unmap_single(ar->ab->dev, buff->paddr, + ring->buf_sz, DMA_FROM_DEVICE); + kfree(buff->payload); + kfree(buff); + } + + idr_destroy(&ring->bufs_idr); + spin_unlock_bh(&ring->idr_lock); +} -- cgit v1.2.3