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/sgiwd93.c | 332 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 332 insertions(+) create mode 100644 drivers/scsi/sgiwd93.c (limited to 'drivers/scsi/sgiwd93.c') diff --git a/drivers/scsi/sgiwd93.c b/drivers/scsi/sgiwd93.c new file mode 100644 index 000000000..57d5dff62 --- /dev/null +++ b/drivers/scsi/sgiwd93.c @@ -0,0 +1,332 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + * Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu) + * Copyright (C) 2001 Florian Lohoff (flo@rfc822.org) + * Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org) + * + * (In all truth, Jed Schimmel wrote all this code.) + */ + +#undef DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include +#include +#include +#include +#include "wd33c93.h" + +struct ip22_hostdata { + struct WD33C93_hostdata wh; + dma_addr_t dma; + void *cpu; + struct device *dev; +}; + +#define host_to_hostdata(host) ((struct ip22_hostdata *)((host)->hostdata)) + +struct hpc_chunk { + struct hpc_dma_desc desc; + u32 _padding; /* align to quadword boundary */ +}; + +/* space for hpc dma descriptors */ +#define HPC_DMA_SIZE PAGE_SIZE + +#define DMA_DIR(d) ((d == DATA_OUT_DIR) ? DMA_TO_DEVICE : DMA_FROM_DEVICE) + +static irqreturn_t sgiwd93_intr(int irq, void *dev_id) +{ + struct Scsi_Host * host = dev_id; + unsigned long flags; + + spin_lock_irqsave(host->host_lock, flags); + wd33c93_intr(host); + spin_unlock_irqrestore(host->host_lock, flags); + + return IRQ_HANDLED; +} + +static inline +void fill_hpc_entries(struct ip22_hostdata *hd, struct scsi_cmnd *cmd, int din) +{ + struct scsi_pointer *scsi_pointer = WD33C93_scsi_pointer(cmd); + unsigned long len = scsi_pointer->this_residual; + void *addr = scsi_pointer->ptr; + dma_addr_t physaddr; + unsigned long count; + struct hpc_chunk *hcp; + + physaddr = dma_map_single(hd->dev, addr, len, DMA_DIR(din)); + scsi_pointer->dma_handle = physaddr; + hcp = hd->cpu; + + while (len) { + /* + * even cntinfo could be up to 16383, without + * magic only 8192 works correctly + */ + count = len > 8192 ? 8192 : len; + hcp->desc.pbuf = physaddr; + hcp->desc.cntinfo = count; + hcp++; + len -= count; + physaddr += count; + } + + /* + * To make sure, if we trip an HPC bug, that we transfer every single + * byte, we tag on an extra zero length dma descriptor at the end of + * the chain. + */ + hcp->desc.pbuf = 0; + hcp->desc.cntinfo = HPCDMA_EOX; + dma_sync_single_for_device(hd->dev, hd->dma, + (unsigned long)(hcp + 1) - (unsigned long)hd->cpu, + DMA_TO_DEVICE); +} + +static int dma_setup(struct scsi_cmnd *cmd, int datainp) +{ + struct scsi_pointer *scsi_pointer = WD33C93_scsi_pointer(cmd); + struct ip22_hostdata *hdata = host_to_hostdata(cmd->device->host); + struct hpc3_scsiregs *hregs = + (struct hpc3_scsiregs *) cmd->device->host->base; + + pr_debug("dma_setup: datainp<%d> hcp<%p> ", datainp, hdata->cpu); + + hdata->wh.dma_dir = datainp; + + /* + * wd33c93 shouldn't pass us bogus dma_setups, but it does:-( The + * other wd33c93 drivers deal with it the same way (which isn't that + * obvious). IMHO a better fix would be, not to do these dma setups + * in the first place. + */ + if (scsi_pointer->ptr == NULL || scsi_pointer->this_residual == 0) + return 1; + + fill_hpc_entries(hdata, cmd, datainp); + + pr_debug(" HPCGO\n"); + + /* Start up the HPC. */ + hregs->ndptr = hdata->dma; + if (datainp) + hregs->ctrl = HPC3_SCTRL_ACTIVE; + else + hregs->ctrl = HPC3_SCTRL_ACTIVE | HPC3_SCTRL_DIR; + + return 0; +} + +static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, + int status) +{ + struct scsi_pointer *scsi_pointer = WD33C93_scsi_pointer(SCpnt); + struct ip22_hostdata *hdata = host_to_hostdata(instance); + struct hpc3_scsiregs *hregs; + + if (!SCpnt) + return; + + if (scsi_pointer->ptr == NULL || scsi_pointer->this_residual == 0) + return; + + hregs = (struct hpc3_scsiregs *) SCpnt->device->host->base; + + pr_debug("dma_stop: status<%d> ", status); + + /* First stop the HPC and flush it's FIFO. */ + if (hdata->wh.dma_dir) { + hregs->ctrl |= HPC3_SCTRL_FLUSH; + while (hregs->ctrl & HPC3_SCTRL_ACTIVE) + barrier(); + } + hregs->ctrl = 0; + dma_unmap_single(hdata->dev, scsi_pointer->dma_handle, + scsi_pointer->this_residual, + DMA_DIR(hdata->wh.dma_dir)); + + pr_debug("\n"); +} + +void sgiwd93_reset(unsigned long base) +{ + struct hpc3_scsiregs *hregs = (struct hpc3_scsiregs *) base; + + hregs->ctrl = HPC3_SCTRL_CRESET; + udelay(50); + hregs->ctrl = 0; +} +EXPORT_SYMBOL_GPL(sgiwd93_reset); + +static inline void init_hpc_chain(struct ip22_hostdata *hdata) +{ + struct hpc_chunk *hcp = (struct hpc_chunk *)hdata->cpu; + dma_addr_t dma = hdata->dma; + unsigned long start, end; + + start = (unsigned long) hcp; + end = start + HPC_DMA_SIZE; + while (start < end) { + hcp->desc.pnext = (u32) (dma + sizeof(struct hpc_chunk)); + hcp->desc.cntinfo = HPCDMA_EOX; + hcp++; + dma += sizeof(struct hpc_chunk); + start += sizeof(struct hpc_chunk); + } + hcp--; + hcp->desc.pnext = hdata->dma; +} + +/* + * Kludge alert - the SCSI code calls the abort and reset method with int + * arguments not with pointers. So this is going to blow up beautyfully + * on 64-bit systems with memory outside the compat address spaces. + */ +static struct scsi_host_template sgiwd93_template = { + .module = THIS_MODULE, + .proc_name = "SGIWD93", + .name = "SGI WD93", + .queuecommand = wd33c93_queuecommand, + .eh_abort_handler = wd33c93_abort, + .eh_host_reset_handler = wd33c93_host_reset, + .can_queue = 16, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 8, + .dma_boundary = PAGE_SIZE - 1, + .cmd_size = sizeof(struct scsi_pointer), +}; + +static int sgiwd93_probe(struct platform_device *pdev) +{ + struct sgiwd93_platform_data *pd = pdev->dev.platform_data; + unsigned char *wdregs = pd->wdregs; + struct hpc3_scsiregs *hregs = pd->hregs; + struct ip22_hostdata *hdata; + struct Scsi_Host *host; + wd33c93_regs regs; + unsigned int unit = pd->unit; + unsigned int irq = pd->irq; + int err; + + host = scsi_host_alloc(&sgiwd93_template, sizeof(struct ip22_hostdata)); + if (!host) { + err = -ENOMEM; + goto out; + } + + host->base = (unsigned long) hregs; + host->irq = irq; + + hdata = host_to_hostdata(host); + hdata->dev = &pdev->dev; + hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE, + &hdata->dma, DMA_TO_DEVICE, GFP_KERNEL); + if (!hdata->cpu) { + printk(KERN_WARNING "sgiwd93: Could not allocate memory for " + "host %d buffer.\n", unit); + err = -ENOMEM; + goto out_put; + } + + init_hpc_chain(hdata); + + regs.SASR = wdregs + 3; + regs.SCMD = wdregs + 7; + + hdata->wh.no_sync = 0; + hdata->wh.fast = 1; + hdata->wh.dma_mode = CTRL_BURST; + + wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_MHZ(20)); + + err = request_irq(irq, sgiwd93_intr, 0, "SGI WD93", host); + if (err) { + printk(KERN_WARNING "sgiwd93: Could not register irq %d " + "for host %d.\n", irq, unit); + goto out_free; + } + + platform_set_drvdata(pdev, host); + + err = scsi_add_host(host, NULL); + if (err) + goto out_irq; + + scsi_scan_host(host); + + return 0; + +out_irq: + free_irq(irq, host); +out_free: + dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma, + DMA_TO_DEVICE); +out_put: + scsi_host_put(host); +out: + + return err; +} + +static int sgiwd93_remove(struct platform_device *pdev) +{ + struct Scsi_Host *host = platform_get_drvdata(pdev); + struct ip22_hostdata *hdata = (struct ip22_hostdata *) host->hostdata; + struct sgiwd93_platform_data *pd = pdev->dev.platform_data; + + scsi_remove_host(host); + free_irq(pd->irq, host); + dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma, + DMA_TO_DEVICE); + scsi_host_put(host); + return 0; +} + +static struct platform_driver sgiwd93_driver = { + .probe = sgiwd93_probe, + .remove = sgiwd93_remove, + .driver = { + .name = "sgiwd93", + } +}; + +static int __init sgiwd93_module_init(void) +{ + return platform_driver_register(&sgiwd93_driver); +} + +static void __exit sgiwd93_module_exit(void) +{ + return platform_driver_unregister(&sgiwd93_driver); +} + +module_init(sgiwd93_module_init); +module_exit(sgiwd93_module_exit); + +MODULE_DESCRIPTION("SGI WD33C93 driver"); +MODULE_AUTHOR("Ralf Baechle "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:sgiwd93"); -- cgit v1.2.3