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/ufs/core/ufs_bsg.c | 233 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 drivers/ufs/core/ufs_bsg.c (limited to 'drivers/ufs/core/ufs_bsg.c') diff --git a/drivers/ufs/core/ufs_bsg.c b/drivers/ufs/core/ufs_bsg.c new file mode 100644 index 000000000..b99e3f3dc --- /dev/null +++ b/drivers/ufs/core/ufs_bsg.c @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * bsg endpoint that supports UPIUs + * + * Copyright (C) 2018 Western Digital Corporation + */ + +#include +#include +#include +#include "ufs_bsg.h" +#include +#include "ufshcd-priv.h" + +static int ufs_bsg_get_query_desc_size(struct ufs_hba *hba, int *desc_len, + struct utp_upiu_query *qr) +{ + int desc_size = be16_to_cpu(qr->length); + int desc_id = qr->idn; + + if (desc_size <= 0) + return -EINVAL; + + ufshcd_map_desc_id_to_length(hba, desc_id, desc_len); + if (!*desc_len) + return -EINVAL; + + *desc_len = min_t(int, *desc_len, desc_size); + + return 0; +} + +static int ufs_bsg_verify_query_size(struct ufs_hba *hba, + unsigned int request_len, + unsigned int reply_len) +{ + int min_req_len = sizeof(struct ufs_bsg_request); + int min_rsp_len = sizeof(struct ufs_bsg_reply); + + if (min_req_len > request_len || min_rsp_len > reply_len) { + dev_err(hba->dev, "not enough space assigned\n"); + return -EINVAL; + } + + return 0; +} + +static int ufs_bsg_alloc_desc_buffer(struct ufs_hba *hba, struct bsg_job *job, + uint8_t **desc_buff, int *desc_len, + enum query_opcode desc_op) +{ + struct ufs_bsg_request *bsg_request = job->request; + struct utp_upiu_query *qr; + u8 *descp; + + if (desc_op != UPIU_QUERY_OPCODE_WRITE_DESC && + desc_op != UPIU_QUERY_OPCODE_READ_DESC) + goto out; + + qr = &bsg_request->upiu_req.qr; + if (ufs_bsg_get_query_desc_size(hba, desc_len, qr)) { + dev_err(hba->dev, "Illegal desc size\n"); + return -EINVAL; + } + + if (*desc_len > job->request_payload.payload_len) { + dev_err(hba->dev, "Illegal desc size\n"); + return -EINVAL; + } + + descp = kzalloc(*desc_len, GFP_KERNEL); + if (!descp) + return -ENOMEM; + + if (desc_op == UPIU_QUERY_OPCODE_WRITE_DESC) + sg_copy_to_buffer(job->request_payload.sg_list, + job->request_payload.sg_cnt, descp, + *desc_len); + + *desc_buff = descp; + +out: + return 0; +} + +static int ufs_bsg_request(struct bsg_job *job) +{ + struct ufs_bsg_request *bsg_request = job->request; + struct ufs_bsg_reply *bsg_reply = job->reply; + struct ufs_hba *hba = shost_priv(dev_to_shost(job->dev->parent)); + unsigned int req_len = job->request_len; + unsigned int reply_len = job->reply_len; + struct uic_command uc = {}; + int msgcode; + uint8_t *desc_buff = NULL; + int desc_len = 0; + enum query_opcode desc_op = UPIU_QUERY_OPCODE_NOP; + int ret; + + ret = ufs_bsg_verify_query_size(hba, req_len, reply_len); + if (ret) + goto out; + + bsg_reply->reply_payload_rcv_len = 0; + + ufshcd_rpm_get_sync(hba); + + msgcode = bsg_request->msgcode; + switch (msgcode) { + case UPIU_TRANSACTION_QUERY_REQ: + desc_op = bsg_request->upiu_req.qr.opcode; + ret = ufs_bsg_alloc_desc_buffer(hba, job, &desc_buff, + &desc_len, desc_op); + if (ret) { + ufshcd_rpm_put_sync(hba); + goto out; + } + + fallthrough; + case UPIU_TRANSACTION_NOP_OUT: + case UPIU_TRANSACTION_TASK_REQ: + ret = ufshcd_exec_raw_upiu_cmd(hba, &bsg_request->upiu_req, + &bsg_reply->upiu_rsp, msgcode, + desc_buff, &desc_len, desc_op); + if (ret) + dev_err(hba->dev, + "exe raw upiu: error code %d\n", ret); + + break; + case UPIU_TRANSACTION_UIC_CMD: + memcpy(&uc, &bsg_request->upiu_req.uc, UIC_CMD_SIZE); + ret = ufshcd_send_uic_cmd(hba, &uc); + if (ret) + dev_err(hba->dev, + "send uic cmd: error code %d\n", ret); + + memcpy(&bsg_reply->upiu_rsp.uc, &uc, UIC_CMD_SIZE); + + break; + default: + ret = -ENOTSUPP; + dev_err(hba->dev, "unsupported msgcode 0x%x\n", msgcode); + + break; + } + + ufshcd_rpm_put_sync(hba); + + if (!desc_buff) + goto out; + + if (desc_op == UPIU_QUERY_OPCODE_READ_DESC && desc_len) + bsg_reply->reply_payload_rcv_len = + sg_copy_from_buffer(job->request_payload.sg_list, + job->request_payload.sg_cnt, + desc_buff, desc_len); + + kfree(desc_buff); + +out: + bsg_reply->result = ret; + job->reply_len = sizeof(struct ufs_bsg_reply); + /* complete the job here only if no error */ + if (ret == 0) + bsg_job_done(job, ret, bsg_reply->reply_payload_rcv_len); + + return ret; +} + +/** + * ufs_bsg_remove - detach and remove the added ufs-bsg node + * @hba: per adapter object + * + * Should be called when unloading the driver. + */ +void ufs_bsg_remove(struct ufs_hba *hba) +{ + struct device *bsg_dev = &hba->bsg_dev; + + if (!hba->bsg_queue) + return; + + bsg_remove_queue(hba->bsg_queue); + + device_del(bsg_dev); + put_device(bsg_dev); +} + +static inline void ufs_bsg_node_release(struct device *dev) +{ + put_device(dev->parent); +} + +/** + * ufs_bsg_probe - Add ufs bsg device node + * @hba: per adapter object + * + * Called during initial loading of the driver, and before scsi_scan_host. + */ +int ufs_bsg_probe(struct ufs_hba *hba) +{ + struct device *bsg_dev = &hba->bsg_dev; + struct Scsi_Host *shost = hba->host; + struct device *parent = &shost->shost_gendev; + struct request_queue *q; + int ret; + + device_initialize(bsg_dev); + + bsg_dev->parent = get_device(parent); + bsg_dev->release = ufs_bsg_node_release; + + dev_set_name(bsg_dev, "ufs-bsg%u", shost->host_no); + + ret = device_add(bsg_dev); + if (ret) + goto out; + + q = bsg_setup_queue(bsg_dev, dev_name(bsg_dev), ufs_bsg_request, NULL, 0); + if (IS_ERR(q)) { + ret = PTR_ERR(q); + goto out; + } + + hba->bsg_queue = q; + + return 0; + +out: + dev_err(bsg_dev, "fail to initialize a bsg dev %d\n", shost->host_no); + put_device(bsg_dev); + return ret; +} -- cgit v1.2.3