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/arm/powertec.c | 452 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 452 insertions(+) create mode 100644 drivers/scsi/arm/powertec.c (limited to 'drivers/scsi/arm/powertec.c') diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c new file mode 100644 index 000000000..7586d2a03 --- /dev/null +++ b/drivers/scsi/arm/powertec.c @@ -0,0 +1,452 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/acorn/scsi/powertec.c + * + * Copyright (C) 1997-2005 Russell King + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include "fas216.h" +#include "arm_scsi.h" + +#include + +#define POWERTEC_FAS216_OFFSET 0x3000 +#define POWERTEC_FAS216_SHIFT 6 + +#define POWERTEC_INTR_STATUS 0x2000 +#define POWERTEC_INTR_BIT 0x80 + +#define POWERTEC_RESET_CONTROL 0x1018 +#define POWERTEC_RESET_BIT 1 + +#define POWERTEC_TERM_CONTROL 0x2018 +#define POWERTEC_TERM_ENABLE 1 + +#define POWERTEC_INTR_CONTROL 0x101c +#define POWERTEC_INTR_ENABLE 1 +#define POWERTEC_INTR_DISABLE 0 + +#define VERSION "1.10 (19/01/2003 2.5.59)" + +/* + * Use term=0,1,0,0,0 to turn terminators on/off. + * One entry per slot. + */ +static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; + +#define NR_SG 256 + +struct powertec_info { + FAS216_Info info; + struct expansion_card *ec; + void __iomem *base; + unsigned int term_ctl; + struct scatterlist sg[NR_SG]; +}; + +/* Prototype: void powertecscsi_irqenable(ec, irqnr) + * Purpose : Enable interrupts on Powertec SCSI card + * Params : ec - expansion card structure + * : irqnr - interrupt number + */ +static void +powertecscsi_irqenable(struct expansion_card *ec, int irqnr) +{ + struct powertec_info *info = ec->irq_data; + writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL); +} + +/* Prototype: void powertecscsi_irqdisable(ec, irqnr) + * Purpose : Disable interrupts on Powertec SCSI card + * Params : ec - expansion card structure + * : irqnr - interrupt number + */ +static void +powertecscsi_irqdisable(struct expansion_card *ec, int irqnr) +{ + struct powertec_info *info = ec->irq_data; + writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL); +} + +static const expansioncard_ops_t powertecscsi_ops = { + .irqenable = powertecscsi_irqenable, + .irqdisable = powertecscsi_irqdisable, +}; + +/* Prototype: void powertecscsi_terminator_ctl(host, on_off) + * Purpose : Turn the Powertec SCSI terminators on or off + * Params : host - card to turn on/off + * : on_off - !0 to turn on, 0 to turn off + */ +static void +powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off) +{ + struct powertec_info *info = (struct powertec_info *)host->hostdata; + + info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0; + writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL); +} + +/* Prototype: void powertecscsi_intr(irq, *dev_id, *regs) + * Purpose : handle interrupts from Powertec SCSI card + * Params : irq - interrupt number + * dev_id - user-defined (Scsi_Host structure) + */ +static irqreturn_t powertecscsi_intr(int irq, void *dev_id) +{ + struct powertec_info *info = dev_id; + + return fas216_intr(&info->info); +} + +/* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type) + * Purpose : initialises DMA/PIO + * Params : host - host + * SCpnt - command + * direction - DMA on to/off of card + * min_type - minimum DMA support that we must have for this transfer + * Returns : type of transfer to be performed + */ +static fasdmatype_t +powertecscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, + fasdmadir_t direction, fasdmatype_t min_type) +{ + struct powertec_info *info = (struct powertec_info *)host->hostdata; + struct device *dev = scsi_get_device(host); + int dmach = info->info.scsi.dma; + + if (info->info.ifcfg.capabilities & FASCAP_DMA && + min_type == fasdma_real_all) { + int bufs, map_dir, dma_dir; + + bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG); + + if (direction == DMA_OUT) { + map_dir = DMA_TO_DEVICE; + dma_dir = DMA_MODE_WRITE; + } else { + map_dir = DMA_FROM_DEVICE; + dma_dir = DMA_MODE_READ; + } + + dma_map_sg(dev, info->sg, bufs, map_dir); + + disable_dma(dmach); + set_dma_sg(dmach, info->sg, bufs); + set_dma_mode(dmach, dma_dir); + enable_dma(dmach); + return fasdma_real_all; + } + + /* + * If we're not doing DMA, + * we'll do slow PIO + */ + return fasdma_pio; +} + +/* Prototype: int powertecscsi_dma_stop(host, SCpnt) + * Purpose : stops DMA/PIO + * Params : host - host + * SCpnt - command + */ +static void +powertecscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp) +{ + struct powertec_info *info = (struct powertec_info *)host->hostdata; + if (info->info.scsi.dma != NO_DMA) + disable_dma(info->info.scsi.dma); +} + +/* Prototype: const char *powertecscsi_info(struct Scsi_Host * host) + * Purpose : returns a descriptive string about this interface, + * Params : host - driver host structure to return info for. + * Returns : pointer to a static buffer containing null terminated string. + */ +const char *powertecscsi_info(struct Scsi_Host *host) +{ + struct powertec_info *info = (struct powertec_info *)host->hostdata; + static char string[150]; + + sprintf(string, "%s (%s) in slot %d v%s terminators o%s", + host->hostt->name, info->info.scsi.type, info->ec->slot_no, + VERSION, info->term_ctl ? "n" : "ff"); + + return string; +} + +/* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) + * Purpose : Set a driver specific function + * Params : host - host to setup + * : buffer - buffer containing string describing operation + * : length - length of string + * Returns : -EINVAL, or 0 + */ +static int +powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) +{ + int ret = length; + + if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) { + buffer += 12; + length -= 12; + + if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { + if (buffer[5] == '1') + powertecscsi_terminator_ctl(host, 1); + else if (buffer[5] == '0') + powertecscsi_terminator_ctl(host, 0); + else + ret = -EINVAL; + } else + ret = -EINVAL; + } else + ret = -EINVAL; + + return ret; +} + +/* Prototype: int powertecscsi_proc_info(char *buffer, char **start, off_t offset, + * int length, int host_no, int inout) + * Purpose : Return information about the driver to a user process accessing + * the /proc filesystem. + * Params : buffer - a buffer to write information to + * start - a pointer into this buffer set by this routine to the start + * of the required information. + * offset - offset into information that we have read up to. + * length - length of buffer + * inout - 0 for reading, 1 for writing. + * Returns : length of data written to buffer. + */ +static int powertecscsi_show_info(struct seq_file *m, struct Scsi_Host *host) +{ + struct powertec_info *info; + + info = (struct powertec_info *)host->hostdata; + + seq_printf(m, "PowerTec SCSI driver v%s\n", VERSION); + fas216_print_host(&info->info, m); + seq_printf(m, "Term : o%s\n", + info->term_ctl ? "n" : "ff"); + + fas216_print_stats(&info->info, m); + fas216_print_devices(&info->info, m); + return 0; +} + +static ssize_t powertecscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct expansion_card *ec = ECARD_DEV(dev); + struct Scsi_Host *host = ecard_get_drvdata(ec); + struct powertec_info *info = (struct powertec_info *)host->hostdata; + + return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0); +} + +static ssize_t +powertecscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) +{ + struct expansion_card *ec = ECARD_DEV(dev); + struct Scsi_Host *host = ecard_get_drvdata(ec); + + if (len > 1) + powertecscsi_terminator_ctl(host, buf[0] != '0'); + + return len; +} + +static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR, + powertecscsi_show_term, powertecscsi_store_term); + +static struct scsi_host_template powertecscsi_template = { + .module = THIS_MODULE, + .show_info = powertecscsi_show_info, + .write_info = powertecscsi_set_proc_info, + .name = "PowerTec SCSI", + .info = powertecscsi_info, + .queuecommand = fas216_queue_command, + .eh_host_reset_handler = fas216_eh_host_reset, + .eh_bus_reset_handler = fas216_eh_bus_reset, + .eh_device_reset_handler = fas216_eh_device_reset, + .eh_abort_handler = fas216_eh_abort, + .cmd_size = sizeof(struct fas216_cmd_priv), + .can_queue = 8, + .this_id = 7, + .sg_tablesize = SG_MAX_SEGMENTS, + .dma_boundary = IOMD_DMA_BOUNDARY, + .cmd_per_lun = 2, + .proc_name = "powertec", +}; + +static int powertecscsi_probe(struct expansion_card *ec, + const struct ecard_id *id) +{ + struct Scsi_Host *host; + struct powertec_info *info; + void __iomem *base; + int ret; + + ret = ecard_request_resources(ec); + if (ret) + goto out; + + base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); + if (!base) { + ret = -ENOMEM; + goto out_region; + } + + host = scsi_host_alloc(&powertecscsi_template, + sizeof (struct powertec_info)); + if (!host) { + ret = -ENOMEM; + goto out_region; + } + + ecard_set_drvdata(ec, host); + + info = (struct powertec_info *)host->hostdata; + info->base = base; + powertecscsi_terminator_ctl(host, term[ec->slot_no]); + + info->ec = ec; + info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET; + info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT; + info->info.scsi.irq = ec->irq; + info->info.scsi.dma = ec->dma; + info->info.ifcfg.clockrate = 40; /* MHz */ + info->info.ifcfg.select_timeout = 255; + info->info.ifcfg.asyncperiod = 200; /* ns */ + info->info.ifcfg.sync_max_depth = 7; + info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK; + info->info.ifcfg.disconnect_ok = 1; + info->info.ifcfg.wide_max_size = 0; + info->info.ifcfg.capabilities = 0; + info->info.dma.setup = powertecscsi_dma_setup; + info->info.dma.pseudo = NULL; + info->info.dma.stop = powertecscsi_dma_stop; + + ec->irqaddr = base + POWERTEC_INTR_STATUS; + ec->irqmask = POWERTEC_INTR_BIT; + + ecard_setirq(ec, &powertecscsi_ops, info); + + device_create_file(&ec->dev, &dev_attr_bus_term); + + ret = fas216_init(host); + if (ret) + goto out_free; + + ret = request_irq(ec->irq, powertecscsi_intr, + 0, "powertec", info); + if (ret) { + printk("scsi%d: IRQ%d not free: %d\n", + host->host_no, ec->irq, ret); + goto out_release; + } + + if (info->info.scsi.dma != NO_DMA) { + if (request_dma(info->info.scsi.dma, "powertec")) { + printk("scsi%d: DMA%d not free, using PIO\n", + host->host_no, info->info.scsi.dma); + info->info.scsi.dma = NO_DMA; + } else { + set_dma_speed(info->info.scsi.dma, 180); + info->info.ifcfg.capabilities |= FASCAP_DMA; + } + } + + ret = fas216_add(host, &ec->dev); + if (ret == 0) + goto out; + + if (info->info.scsi.dma != NO_DMA) + free_dma(info->info.scsi.dma); + free_irq(ec->irq, info); + + out_release: + fas216_release(host); + + out_free: + device_remove_file(&ec->dev, &dev_attr_bus_term); + scsi_host_put(host); + + out_region: + ecard_release_resources(ec); + + out: + return ret; +} + +static void powertecscsi_remove(struct expansion_card *ec) +{ + struct Scsi_Host *host = ecard_get_drvdata(ec); + struct powertec_info *info = (struct powertec_info *)host->hostdata; + + ecard_set_drvdata(ec, NULL); + fas216_remove(host); + + device_remove_file(&ec->dev, &dev_attr_bus_term); + + if (info->info.scsi.dma != NO_DMA) + free_dma(info->info.scsi.dma); + free_irq(ec->irq, info); + + fas216_release(host); + scsi_host_put(host); + ecard_release_resources(ec); +} + +static const struct ecard_id powertecscsi_cids[] = { + { MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI }, + { 0xffff, 0xffff }, +}; + +static struct ecard_driver powertecscsi_driver = { + .probe = powertecscsi_probe, + .remove = powertecscsi_remove, + .id_table = powertecscsi_cids, + .drv = { + .name = "powertecscsi", + }, +}; + +static int __init powertecscsi_init(void) +{ + return ecard_register_driver(&powertecscsi_driver); +} + +static void __exit powertecscsi_exit(void) +{ + ecard_remove_driver(&powertecscsi_driver); +} + +module_init(powertecscsi_init); +module_exit(powertecscsi_exit); + +MODULE_AUTHOR("Russell King"); +MODULE_DESCRIPTION("Powertec SCSI driver"); +module_param_array(term, int, NULL, 0); +MODULE_PARM_DESC(term, "SCSI bus termination"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3