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/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h | 362 +++++++++++++++++++++++++++++++ 1 file changed, 362 insertions(+) create mode 100644 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h (limited to 'drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h') diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h new file mode 100644 index 000000000..7ae074e5d --- /dev/null +++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.h @@ -0,0 +1,362 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/******************************************************************************* + * IBM Virtual SCSI Target Driver + * Copyright (C) 2003-2005 Dave Boutcher (boutcher@us.ibm.com) IBM Corp. + * Santiago Leon (santil@us.ibm.com) IBM Corp. + * Linda Xie (lxie@us.ibm.com) IBM Corp. + * + * Copyright (C) 2005-2011 FUJITA Tomonori + * Copyright (C) 2010 Nicholas A. Bellinger + * Copyright (C) 2016 Bryant G. Ly IBM Corp. + * + * Authors: Bryant G. Ly + * Authors: Michael Cyr + * + ****************************************************************************/ + +#ifndef __H_IBMVSCSI_TGT +#define __H_IBMVSCSI_TGT + +#include +#include "libsrp.h" + +#define SYS_ID_NAME_LEN 64 +#define PARTITION_NAMELEN 96 +#define IBMVSCSIS_NAMELEN 32 + +#define MSG_HI 0 +#define MSG_LOW 1 + +#define MAX_CMD_Q_PAGES 4 +#define CRQ_PER_PAGE (PAGE_SIZE / sizeof(struct viosrp_crq)) +/* in terms of number of elements */ +#define DEFAULT_CMD_Q_SIZE CRQ_PER_PAGE +#define MAX_CMD_Q_SIZE (DEFAULT_CMD_Q_SIZE * MAX_CMD_Q_PAGES) + +#define SRP_VIOLATION 0x102 /* general error code */ + +/* + * SRP buffer formats defined as of 16.a supported by this driver. + */ +#define SUPPORTED_FORMATS ((SRP_DATA_DESC_DIRECT << 1) | \ + (SRP_DATA_DESC_INDIRECT << 1)) + +#define SCSI_LUN_ADDR_METHOD_FLAT 1 + +struct dma_window { + u32 liobn; /* Unique per vdevice */ + u64 tce_base; /* Physical location of the TCE table */ + u64 tce_size; /* Size of the TCE table in bytes */ +}; + +struct target_dds { + u64 unit_id; /* 64 bit will force alignment */ +#define NUM_DMA_WINDOWS 2 +#define LOCAL 0 +#define REMOTE 1 + struct dma_window window[NUM_DMA_WINDOWS]; + + /* root node property "ibm,partition-no" */ + uint partition_num; + char partition_name[PARTITION_NAMELEN]; +}; + +#define MAX_NUM_PORTS 1 +#define MAX_H_COPY_RDMA (128 * 1024) + +#define MAX_EYE 64 + +/* Return codes */ +#define ADAPT_SUCCESS 0L +/* choose error codes that do not conflict with PHYP */ +#define ERROR -40L + +struct format_code { + u8 reserved; + u8 buffers; +}; + +struct client_info { +#define SRP_VERSION "16.a" + char srp_version[8]; + /* root node property ibm,partition-name */ + char partition_name[PARTITION_NAMELEN]; + /* root node property ibm,partition-no */ + u32 partition_number; + /* initially 1 */ + u32 mad_version; + u32 os_type; +}; + +/* + * Changing this constant changes the number of seconds to wait before + * considering the client will never service its queue again. + */ +#define SECONDS_TO_CONSIDER_FAILED 30 +/* + * These constants set the polling period used to determine if the client + * has freed at least one element in the response queue. + */ +#define WAIT_SECONDS 1 +#define WAIT_NANO_SECONDS 5000 +#define MAX_TIMER_POPS ((1000000 / WAIT_NANO_SECONDS) * \ + SECONDS_TO_CONSIDER_FAILED) +/* + * general purpose timer control block + * which can be used for multiple functions + */ +struct timer_cb { + struct hrtimer timer; + /* + * how long has it been since the client + * serviced the queue. The variable is incrmented + * in the service_wait_q routine and cleared + * in send messages + */ + int timer_pops; + /* the timer is started */ + bool started; +}; + +struct cmd_queue { + /* kva */ + struct viosrp_crq *base_addr; + dma_addr_t crq_token; + /* used to maintain index */ + uint mask; + /* current element */ + uint index; + int size; +}; + +#define SCSOLNT_RESP_SHIFT 1 +#define UCSOLNT_RESP_SHIFT 2 + +#define SCSOLNT BIT(SCSOLNT_RESP_SHIFT) +#define UCSOLNT BIT(UCSOLNT_RESP_SHIFT) + +enum cmd_type { + SCSI_CDB = 0x01, + TASK_MANAGEMENT = 0x02, + /* MAD or addressed to port 0 */ + ADAPTER_MAD = 0x04, + UNSET_TYPE = 0x08, +}; + +struct iu_rsp { + u8 format; + u8 sol_not; + u16 len; + /* tag is just to help client identify cmd, so don't translate be/le */ + u64 tag; +}; + +struct ibmvscsis_cmd { + struct list_head list; + /* Used for TCM Core operations */ + struct se_cmd se_cmd; + struct iu_entry *iue; + struct iu_rsp rsp; + struct work_struct work; + struct scsi_info *adapter; + struct ibmvscsis_cmd *abort_cmd; + /* Sense buffer that will be mapped into outgoing status */ + unsigned char sense_buf[TRANSPORT_SENSE_BUFFER]; + u64 init_time; +#define CMD_FAST_FAIL BIT(0) +#define DELAY_SEND BIT(1) + u32 flags; + char type; +}; + +struct ibmvscsis_nexus { + struct se_session *se_sess; +}; + +struct ibmvscsis_tport { + /* SCSI protocol the tport is providing */ + u8 tport_proto_id; + /* ASCII formatted WWPN for SRP Target port */ + char tport_name[IBMVSCSIS_NAMELEN]; + /* Returned by ibmvscsis_make_tport() */ + struct se_wwn tport_wwn; + /* Returned by ibmvscsis_make_tpg() */ + struct se_portal_group se_tpg; + /* ibmvscsis port target portal group tag for TCM */ + u16 tport_tpgt; + /* Pointer to TCM session for I_T Nexus */ + struct ibmvscsis_nexus *ibmv_nexus; + bool enabled; + bool releasing; +}; + +struct scsi_info { + struct list_head list; + char eye[MAX_EYE]; + + /* commands waiting for space on repsonse queue */ + struct list_head waiting_rsp; +#define NO_QUEUE 0x00 +#define WAIT_ENABLED 0X01 +#define WAIT_CONNECTION 0x04 + /* have established a connection */ +#define CONNECTED 0x08 + /* at least one port is processing SRP IU */ +#define SRP_PROCESSING 0x10 + /* remove request received */ +#define UNCONFIGURING 0x20 + /* disconnect by letting adapter go idle, no error */ +#define WAIT_IDLE 0x40 + /* disconnecting to clear an error */ +#define ERR_DISCONNECT 0x80 + /* disconnect to clear error state, then come back up */ +#define ERR_DISCONNECT_RECONNECT 0x100 + /* disconnected after clearing an error */ +#define ERR_DISCONNECTED 0x200 + /* A series of errors caused unexpected errors */ +#define UNDEFINED 0x400 + u16 state; + int fast_fail; + struct target_dds dds; + char *cmd_pool; + /* list of free commands */ + struct list_head free_cmd; + /* command elements ready for scheduler */ + struct list_head schedule_q; + /* commands sent to TCM */ + struct list_head active_q; + caddr_t *map_buf; + /* ioba of map buffer */ + dma_addr_t map_ioba; + /* allowable number of outstanding SRP requests */ + int request_limit; + /* extra credit */ + int credit; + /* outstanding transactions against credit limit */ + int debit; + + /* allow only one outstanding mad request */ +#define PROCESSING_MAD 0x00002 + /* Waiting to go idle */ +#define WAIT_FOR_IDLE 0x00004 + /* H_REG_CRQ called */ +#define CRQ_CLOSED 0x00010 + /* detected that client has failed */ +#define CLIENT_FAILED 0x00040 + /* detected that transport event occurred */ +#define TRANS_EVENT 0x00080 + /* don't attempt to send anything to the client */ +#define RESPONSE_Q_DOWN 0x00100 + /* request made to schedule disconnect handler */ +#define SCHEDULE_DISCONNECT 0x00400 + /* disconnect handler is scheduled */ +#define DISCONNECT_SCHEDULED 0x00800 + /* remove function is sleeping */ +#define CFG_SLEEPING 0x01000 + /* Register for Prepare for Suspend Transport Events */ +#define PREP_FOR_SUSPEND_ENABLED 0x02000 + /* Prepare for Suspend event sent */ +#define PREP_FOR_SUSPEND_PENDING 0x04000 + /* Resume from Suspend event sent */ +#define PREP_FOR_SUSPEND_ABORTED 0x08000 + /* Prepare for Suspend event overwrote another CRQ entry */ +#define PREP_FOR_SUSPEND_OVERWRITE 0x10000 + u32 flags; + /* adapter lock */ + spinlock_t intr_lock; + /* information needed to manage command queue */ + struct cmd_queue cmd_q; + /* used in hcall to copy response back into srp buffer */ + u64 empty_iu_id; + /* used in crq, to tag what iu the response is for */ + u64 empty_iu_tag; + uint new_state; + uint resume_state; + /* control block for the response queue timer */ + struct timer_cb rsp_q_timer; + /* keep last client to enable proper accounting */ + struct client_info client_data; + /* what can this client do */ + u32 client_cap; + /* + * The following two fields capture state and flag changes that + * can occur when the lock is given up. In the orginal design, + * the lock was held during calls into phyp; + * however, phyp did not meet PAPR architecture. This is + * a work around. + */ + u16 phyp_acr_state; + u32 phyp_acr_flags; + + struct workqueue_struct *work_q; + struct completion wait_idle; + struct completion unconfig; + struct device dev; + struct vio_dev *dma_dev; + struct srp_target target; + struct ibmvscsis_tport tport; + struct tasklet_struct work_task; + struct work_struct proc_work; +}; + +/* + * Provide a constant that allows software to detect the adapter is + * disconnecting from the client from one of several states. + */ +#define IS_DISCONNECTING (UNCONFIGURING | ERR_DISCONNECT_RECONNECT | \ + ERR_DISCONNECT) + +/* + * Provide a constant that can be used with interrupt handling that + * essentially lets the interrupt handler know that all requests should + * be thrown out, + */ +#define DONT_PROCESS_STATE (IS_DISCONNECTING | UNDEFINED | \ + ERR_DISCONNECTED | WAIT_IDLE) + +/* + * If any of these flag bits are set then do not allow the interrupt + * handler to schedule the off level handler. + */ +#define BLOCK (DISCONNECT_SCHEDULED) + +/* State and transition events that stop the interrupt handler */ +#define TARGET_STOP(VSCSI) (long)(((VSCSI)->state & DONT_PROCESS_STATE) | \ + ((VSCSI)->flags & BLOCK)) + +#define PREP_FOR_SUSPEND_FLAGS (PREP_FOR_SUSPEND_ENABLED | \ + PREP_FOR_SUSPEND_PENDING | \ + PREP_FOR_SUSPEND_ABORTED | \ + PREP_FOR_SUSPEND_OVERWRITE) + +/* flag bit that are not reset during disconnect */ +#define PRESERVE_FLAG_FIELDS (PREP_FOR_SUSPEND_FLAGS) + +#define vio_iu(IUE) ((union viosrp_iu *)((IUE)->sbuf->buf)) + +#define READ_CMD(cdb) (((cdb)[0] & 0x1F) == 8) +#define WRITE_CMD(cdb) (((cdb)[0] & 0x1F) == 0xA) + +#ifndef H_GET_PARTNER_INFO +#define H_GET_PARTNER_INFO 0x0000000000000008LL +#endif +#ifndef H_ENABLE_PREPARE_FOR_SUSPEND +#define H_ENABLE_PREPARE_FOR_SUSPEND 0x000000000000001DLL +#endif +#ifndef H_READY_FOR_SUSPEND +#define H_READY_FOR_SUSPEND 0x000000000000001ELL +#endif + + +#define h_copy_rdma(l, sa, sb, da, db) \ + plpar_hcall_norets(H_COPY_RDMA, l, sa, sb, da, db) +#define h_vioctl(u, o, a, u1, u2, u3, u4) \ + plpar_hcall_norets(H_VIOCTL, u, o, a, u1, u2) +#define h_reg_crq(ua, tok, sz) \ + plpar_hcall_norets(H_REG_CRQ, ua, tok, sz) +#define h_free_crq(ua) \ + plpar_hcall_norets(H_FREE_CRQ, ua) +#define h_send_crq(ua, d1, d2) \ + plpar_hcall_norets(H_SEND_CRQ, ua, d1, d2) + +#endif -- cgit v1.2.3