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(). ... --- arch/m68k/emu/Makefile | 10 ++ arch/m68k/emu/natfeat.c | 95 +++++++++++++++++ arch/m68k/emu/nfblock.c | 192 +++++++++++++++++++++++++++++++++++ arch/m68k/emu/nfcon.c | 176 ++++++++++++++++++++++++++++++++ arch/m68k/emu/nfeth.c | 265 ++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 738 insertions(+) create mode 100644 arch/m68k/emu/Makefile create mode 100644 arch/m68k/emu/natfeat.c create mode 100644 arch/m68k/emu/nfblock.c create mode 100644 arch/m68k/emu/nfcon.c create mode 100644 arch/m68k/emu/nfeth.c (limited to 'arch/m68k/emu') diff --git a/arch/m68k/emu/Makefile b/arch/m68k/emu/Makefile new file mode 100644 index 000000000..4c16e3e6c --- /dev/null +++ b/arch/m68k/emu/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for Linux arch/m68k/emu source directory +# + +obj-y += natfeat.o + +obj-$(CONFIG_NFBLOCK) += nfblock.o +obj-$(CONFIG_NFCON) += nfcon.o +obj-$(CONFIG_NFETH) += nfeth.o diff --git a/arch/m68k/emu/natfeat.c b/arch/m68k/emu/natfeat.c new file mode 100644 index 000000000..b19dc0002 --- /dev/null +++ b/arch/m68k/emu/natfeat.c @@ -0,0 +1,95 @@ +/* + * natfeat.c - ARAnyM hardware support via Native Features (natfeats) + * + * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team + * + * Reworked for Linux by Roman Zippel + * + * This software may be used and distributed according to the terms of + * the GNU General Public License (GPL), incorporated herein by reference. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +extern long nf_get_id_phys(unsigned long feature_name); + +asm("\n" +" .global nf_get_id_phys,nf_call\n" +"nf_get_id_phys:\n" +" .short 0x7300\n" +" rts\n" +"nf_call:\n" +" .short 0x7301\n" +" rts\n" +"1: moveq.l #0,%d0\n" +" rts\n" +" .section __ex_table,\"a\"\n" +" .long nf_get_id_phys,1b\n" +" .long nf_call,1b\n" +" .previous"); +EXPORT_SYMBOL_GPL(nf_call); + +long nf_get_id(const char *feature_name) +{ + /* feature_name may be in vmalloc()ed memory, so make a copy */ + char name_copy[32]; + size_t n; + + n = strlcpy(name_copy, feature_name, sizeof(name_copy)); + if (n >= sizeof(name_copy)) + return 0; + + return nf_get_id_phys(virt_to_phys(name_copy)); +} +EXPORT_SYMBOL_GPL(nf_get_id); + +void nfprint(const char *fmt, ...) +{ + static char buf[256]; + va_list ap; + int n; + + va_start(ap, fmt); + n = vsnprintf(buf, 256, fmt, ap); + nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf)); + va_end(ap); +} + +static void nf_poweroff(void) +{ + long id = nf_get_id("NF_SHUTDOWN"); + + if (id) + nf_call(id); +} + +void __init nf_init(void) +{ + unsigned long id, version; + char buf[256]; + + id = nf_get_id("NF_VERSION"); + if (!id) + return; + version = nf_call(id); + + id = nf_get_id("NF_NAME"); + if (!id) + return; + nf_call(id, virt_to_phys(buf), 256); + buf[255] = 0; + + pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16, + version & 0xffff); + + register_platform_power_off(nf_poweroff); +} diff --git a/arch/m68k/emu/nfblock.c b/arch/m68k/emu/nfblock.c new file mode 100644 index 000000000..a708fbd5a --- /dev/null +++ b/arch/m68k/emu/nfblock.c @@ -0,0 +1,192 @@ +/* + * ARAnyM block device driver + * + * 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. + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include + +static long nfhd_id; + +enum { + /* emulation entry points */ + NFHD_READ_WRITE = 10, + NFHD_GET_CAPACITY = 14, + + /* skip ACSI devices */ + NFHD_DEV_OFFSET = 8, +}; + +static inline s32 nfhd_read_write(u32 major, u32 minor, u32 rwflag, u32 recno, + u32 count, u32 buf) +{ + return nf_call(nfhd_id + NFHD_READ_WRITE, major, minor, rwflag, recno, + count, buf); +} + +static inline s32 nfhd_get_capacity(u32 major, u32 minor, u32 *blocks, + u32 *blocksize) +{ + return nf_call(nfhd_id + NFHD_GET_CAPACITY, major, minor, + virt_to_phys(blocks), virt_to_phys(blocksize)); +} + +static LIST_HEAD(nfhd_list); + +static int major_num; +module_param(major_num, int, 0); + +struct nfhd_device { + struct list_head list; + int id; + u32 blocks, bsize; + int bshift; + struct gendisk *disk; +}; + +static void nfhd_submit_bio(struct bio *bio) +{ + struct nfhd_device *dev = bio->bi_bdev->bd_disk->private_data; + struct bio_vec bvec; + struct bvec_iter iter; + int dir, len, shift; + sector_t sec = bio->bi_iter.bi_sector; + + dir = bio_data_dir(bio); + shift = dev->bshift; + bio_for_each_segment(bvec, bio, iter) { + len = bvec.bv_len; + len >>= 9; + nfhd_read_write(dev->id, 0, dir, sec >> shift, len >> shift, + page_to_phys(bvec.bv_page) + bvec.bv_offset); + sec += len; + } + bio_endio(bio); +} + +static int nfhd_getgeo(struct block_device *bdev, struct hd_geometry *geo) +{ + struct nfhd_device *dev = bdev->bd_disk->private_data; + + geo->cylinders = dev->blocks >> (6 - dev->bshift); + geo->heads = 4; + geo->sectors = 16; + + return 0; +} + +static const struct block_device_operations nfhd_ops = { + .owner = THIS_MODULE, + .submit_bio = nfhd_submit_bio, + .getgeo = nfhd_getgeo, +}; + +static int __init nfhd_init_one(int id, u32 blocks, u32 bsize) +{ + struct nfhd_device *dev; + int dev_id = id - NFHD_DEV_OFFSET; + int err = -ENOMEM; + + pr_info("nfhd%u: found device with %u blocks (%u bytes)\n", dev_id, + blocks, bsize); + + if (bsize < 512 || (bsize & (bsize - 1))) { + pr_warn("nfhd%u: invalid block size\n", dev_id); + return -EINVAL; + } + + dev = kmalloc(sizeof(struct nfhd_device), GFP_KERNEL); + if (!dev) + goto out; + + dev->id = id; + dev->blocks = blocks; + dev->bsize = bsize; + dev->bshift = ffs(bsize) - 10; + + dev->disk = blk_alloc_disk(NUMA_NO_NODE); + if (!dev->disk) + goto free_dev; + + dev->disk->major = major_num; + dev->disk->first_minor = dev_id * 16; + dev->disk->minors = 16; + dev->disk->fops = &nfhd_ops; + dev->disk->private_data = dev; + sprintf(dev->disk->disk_name, "nfhd%u", dev_id); + set_capacity(dev->disk, (sector_t)blocks * (bsize / 512)); + blk_queue_logical_block_size(dev->disk->queue, bsize); + err = add_disk(dev->disk); + if (err) + goto out_cleanup_disk; + + list_add_tail(&dev->list, &nfhd_list); + + return 0; + +out_cleanup_disk: + put_disk(dev->disk); +free_dev: + kfree(dev); +out: + return err; +} + +static int __init nfhd_init(void) +{ + u32 blocks, bsize; + int ret; + int i; + + nfhd_id = nf_get_id("XHDI"); + if (!nfhd_id) + return -ENODEV; + + ret = register_blkdev(major_num, "nfhd"); + if (ret < 0) { + pr_warn("nfhd: unable to get major number\n"); + return ret; + } + + if (!major_num) + major_num = ret; + + for (i = NFHD_DEV_OFFSET; i < 24; i++) { + if (nfhd_get_capacity(i, 0, &blocks, &bsize)) + continue; + nfhd_init_one(i, blocks, bsize); + } + + return 0; +} + +static void __exit nfhd_exit(void) +{ + struct nfhd_device *dev, *next; + + list_for_each_entry_safe(dev, next, &nfhd_list, list) { + list_del(&dev->list); + del_gendisk(dev->disk); + put_disk(dev->disk); + kfree(dev); + } + unregister_blkdev(major_num, "nfhd"); +} + +module_init(nfhd_init); +module_exit(nfhd_exit); + +MODULE_LICENSE("GPL"); diff --git a/arch/m68k/emu/nfcon.c b/arch/m68k/emu/nfcon.c new file mode 100644 index 000000000..6fdc13610 --- /dev/null +++ b/arch/m68k/emu/nfcon.c @@ -0,0 +1,176 @@ +/* + * ARAnyM console driver + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static int stderr_id; +static struct tty_port nfcon_tty_port; +static struct tty_driver *nfcon_tty_driver; + +static void nfputs(const char *str, unsigned int count) +{ + char buf[68]; + unsigned long phys = virt_to_phys(buf); + + buf[64] = 0; + while (count > 64) { + memcpy(buf, str, 64); + nf_call(stderr_id, phys); + str += 64; + count -= 64; + } + memcpy(buf, str, count); + buf[count] = 0; + nf_call(stderr_id, phys); +} + +static void nfcon_write(struct console *con, const char *str, + unsigned int count) +{ + nfputs(str, count); +} + +static struct tty_driver *nfcon_device(struct console *con, int *index) +{ + *index = 0; + return console_is_registered(con) ? nfcon_tty_driver : NULL; +} + +static struct console nf_console = { + .name = "nfcon", + .write = nfcon_write, + .device = nfcon_device, + .flags = CON_PRINTBUFFER, + .index = -1, +}; + + +static int nfcon_tty_open(struct tty_struct *tty, struct file *filp) +{ + return 0; +} + +static void nfcon_tty_close(struct tty_struct *tty, struct file *filp) +{ +} + +static int nfcon_tty_write(struct tty_struct *tty, const unsigned char *buf, + int count) +{ + nfputs(buf, count); + return count; +} + +static int nfcon_tty_put_char(struct tty_struct *tty, unsigned char ch) +{ + char temp[2] = { ch, 0 }; + + nf_call(stderr_id, virt_to_phys(temp)); + return 1; +} + +static unsigned int nfcon_tty_write_room(struct tty_struct *tty) +{ + return 64; +} + +static const struct tty_operations nfcon_tty_ops = { + .open = nfcon_tty_open, + .close = nfcon_tty_close, + .write = nfcon_tty_write, + .put_char = nfcon_tty_put_char, + .write_room = nfcon_tty_write_room, +}; + +#ifndef MODULE + +static int __init nf_debug_setup(char *arg) +{ + if (strcmp(arg, "nfcon")) + return 0; + + stderr_id = nf_get_id("NF_STDERR"); + if (stderr_id) { + /* + * The console will be enabled when debug=nfcon is specified + * as a kernel parameter. Since this is a non-standard way + * of enabling consoles, it must be explicitly enabled. + */ + nf_console.flags |= CON_ENABLED; + register_console(&nf_console); + } + + return 0; +} + +early_param("debug", nf_debug_setup); + +#endif /* !MODULE */ + +static int __init nfcon_init(void) +{ + struct tty_driver *driver; + int res; + + stderr_id = nf_get_id("NF_STDERR"); + if (!stderr_id) + return -ENODEV; + + driver = tty_alloc_driver(1, TTY_DRIVER_REAL_RAW); + if (IS_ERR(driver)) + return PTR_ERR(driver); + + tty_port_init(&nfcon_tty_port); + + driver->driver_name = "nfcon"; + driver->name = "nfcon"; + driver->type = TTY_DRIVER_TYPE_SYSTEM; + driver->subtype = SYSTEM_TYPE_TTY; + driver->init_termios = tty_std_termios; + + tty_set_operations(driver, &nfcon_tty_ops); + tty_port_link_device(&nfcon_tty_port, driver, 0); + res = tty_register_driver(driver); + if (res) { + pr_err("failed to register nfcon tty driver\n"); + tty_driver_kref_put(driver); + tty_port_destroy(&nfcon_tty_port); + return res; + } + + nfcon_tty_driver = driver; + + if (!console_is_registered(&nf_console)) + register_console(&nf_console); + + return 0; +} + +static void __exit nfcon_exit(void) +{ + unregister_console(&nf_console); + tty_unregister_driver(nfcon_tty_driver); + tty_driver_kref_put(nfcon_tty_driver); + tty_port_destroy(&nfcon_tty_port); +} + +module_init(nfcon_init); +module_exit(nfcon_exit); + +MODULE_LICENSE("GPL"); diff --git a/arch/m68k/emu/nfeth.c b/arch/m68k/emu/nfeth.c new file mode 100644 index 000000000..1a5d1e8eb --- /dev/null +++ b/arch/m68k/emu/nfeth.c @@ -0,0 +1,265 @@ +/* + * atari_nfeth.c - ARAnyM ethernet card driver for GNU/Linux + * + * Copyright (c) 2005 Milan Jurik, Petr Stehlik of ARAnyM dev team + * + * Based on ARAnyM driver for FreeMiNT written by Standa Opichal + * + * This software may be used and distributed according to the terms of + * the GNU General Public License (GPL), incorporated herein by reference. + */ + +#define DRV_VERSION "0.3" +#define DRV_RELDATE "10/12/2005" + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include + +enum { + GET_VERSION = 0,/* no parameters, return NFAPI_VERSION in d0 */ + XIF_INTLEVEL, /* no parameters, return Interrupt Level in d0 */ + XIF_IRQ, /* acknowledge interrupt from host */ + XIF_START, /* (ethX), called on 'ifup', start receiver thread */ + XIF_STOP, /* (ethX), called on 'ifdown', stop the thread */ + XIF_READLENGTH, /* (ethX), return size of network data block to read */ + XIF_READBLOCK, /* (ethX, buffer, size), read block of network data */ + XIF_WRITEBLOCK, /* (ethX, buffer, size), write block of network data */ + XIF_GET_MAC, /* (ethX, buffer, size), return MAC HW addr in buffer */ + XIF_GET_IPHOST, /* (ethX, buffer, size), return IP address of host */ + XIF_GET_IPATARI,/* (ethX, buffer, size), return IP address of atari */ + XIF_GET_NETMASK /* (ethX, buffer, size), return IP netmask */ +}; + +#define MAX_UNIT 8 + +/* These identify the driver base version and may not be removed. */ +static const char version[] = + KERN_INFO KBUILD_MODNAME ".c:v" DRV_VERSION " " DRV_RELDATE + " S.Opichal, M.Jurik, P.Stehlik\n" + KERN_INFO " http://aranym.org/\n"; + +MODULE_AUTHOR("Milan Jurik"); +MODULE_DESCRIPTION("Atari NFeth driver"); +MODULE_LICENSE("GPL"); + + +static long nfEtherID; +static int nfEtherIRQ; + +struct nfeth_private { + int ethX; +}; + +static struct net_device *nfeth_dev[MAX_UNIT]; + +static int nfeth_open(struct net_device *dev) +{ + struct nfeth_private *priv = netdev_priv(dev); + int res; + + res = nf_call(nfEtherID + XIF_START, priv->ethX); + netdev_dbg(dev, "%s: %d\n", __func__, res); + + /* Ready for data */ + netif_start_queue(dev); + + return 0; +} + +static int nfeth_stop(struct net_device *dev) +{ + struct nfeth_private *priv = netdev_priv(dev); + + /* No more data */ + netif_stop_queue(dev); + + nf_call(nfEtherID + XIF_STOP, priv->ethX); + + return 0; +} + +/* + * Read a packet out of the adapter and pass it to the upper layers + */ +static inline void recv_packet(struct net_device *dev) +{ + struct nfeth_private *priv = netdev_priv(dev); + unsigned short pktlen; + struct sk_buff *skb; + + /* read packet length (excluding 32 bit crc) */ + pktlen = nf_call(nfEtherID + XIF_READLENGTH, priv->ethX); + + netdev_dbg(dev, "%s: %u\n", __func__, pktlen); + + if (!pktlen) { + netdev_dbg(dev, "%s: pktlen == 0\n", __func__); + dev->stats.rx_errors++; + return; + } + + skb = dev_alloc_skb(pktlen + 2); + if (!skb) { + netdev_dbg(dev, "%s: out of mem (buf_alloc failed)\n", + __func__); + dev->stats.rx_dropped++; + return; + } + + skb->dev = dev; + skb_reserve(skb, 2); /* 16 Byte align */ + skb_put(skb, pktlen); /* make room */ + nf_call(nfEtherID + XIF_READBLOCK, priv->ethX, virt_to_phys(skb->data), + pktlen); + + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += pktlen; + + /* and enqueue packet */ + return; +} + +static irqreturn_t nfeth_interrupt(int irq, void *dev_id) +{ + int i, m, mask; + + mask = nf_call(nfEtherID + XIF_IRQ, 0); + for (i = 0, m = 1; i < MAX_UNIT; m <<= 1, i++) { + if (mask & m && nfeth_dev[i]) { + recv_packet(nfeth_dev[i]); + nf_call(nfEtherID + XIF_IRQ, m); + } + } + return IRQ_HANDLED; +} + +static int nfeth_xmit(struct sk_buff *skb, struct net_device *dev) +{ + unsigned int len; + char *data, shortpkt[ETH_ZLEN]; + struct nfeth_private *priv = netdev_priv(dev); + + data = skb->data; + len = skb->len; + if (len < ETH_ZLEN) { + memset(shortpkt, 0, ETH_ZLEN); + memcpy(shortpkt, data, len); + data = shortpkt; + len = ETH_ZLEN; + } + + netdev_dbg(dev, "%s: send %u bytes\n", __func__, len); + nf_call(nfEtherID + XIF_WRITEBLOCK, priv->ethX, virt_to_phys(data), + len); + + dev->stats.tx_packets++; + dev->stats.tx_bytes += len; + + dev_kfree_skb(skb); + return 0; +} + +static void nfeth_tx_timeout(struct net_device *dev, unsigned int txqueue) +{ + dev->stats.tx_errors++; + netif_wake_queue(dev); +} + +static const struct net_device_ops nfeth_netdev_ops = { + .ndo_open = nfeth_open, + .ndo_stop = nfeth_stop, + .ndo_start_xmit = nfeth_xmit, + .ndo_tx_timeout = nfeth_tx_timeout, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +}; + +static struct net_device * __init nfeth_probe(int unit) +{ + struct net_device *dev; + struct nfeth_private *priv; + char mac[ETH_ALEN], host_ip[32], local_ip[32]; + int err; + + if (!nf_call(nfEtherID + XIF_GET_MAC, unit, virt_to_phys(mac), + ETH_ALEN)) + return NULL; + + dev = alloc_etherdev(sizeof(struct nfeth_private)); + if (!dev) + return NULL; + + dev->irq = nfEtherIRQ; + dev->netdev_ops = &nfeth_netdev_ops; + + eth_hw_addr_set(dev, mac); + + priv = netdev_priv(dev); + priv->ethX = unit; + + err = register_netdev(dev); + if (err) { + free_netdev(dev); + return NULL; + } + + nf_call(nfEtherID + XIF_GET_IPHOST, unit, + virt_to_phys(host_ip), sizeof(host_ip)); + nf_call(nfEtherID + XIF_GET_IPATARI, unit, + virt_to_phys(local_ip), sizeof(local_ip)); + + netdev_info(dev, KBUILD_MODNAME " addr:%s (%s) HWaddr:%pM\n", host_ip, + local_ip, mac); + + return dev; +} + +static int __init nfeth_init(void) +{ + long ver; + int error, i; + + nfEtherID = nf_get_id("ETHERNET"); + if (!nfEtherID) + return -ENODEV; + + ver = nf_call(nfEtherID + GET_VERSION); + pr_info("API %lu\n", ver); + + nfEtherIRQ = nf_call(nfEtherID + XIF_INTLEVEL); + error = request_irq(nfEtherIRQ, nfeth_interrupt, IRQF_SHARED, + "eth emu", nfeth_interrupt); + if (error) { + pr_err("request for irq %d failed %d", nfEtherIRQ, error); + return error; + } + + for (i = 0; i < MAX_UNIT; i++) + nfeth_dev[i] = nfeth_probe(i); + + return 0; +} + +static void __exit nfeth_cleanup(void) +{ + int i; + + for (i = 0; i < MAX_UNIT; i++) { + if (nfeth_dev[i]) { + unregister_netdev(nfeth_dev[i]); + free_netdev(nfeth_dev[i]); + } + } + free_irq(nfEtherIRQ, nfeth_interrupt); +} + +module_init(nfeth_init); +module_exit(nfeth_cleanup); -- cgit v1.2.3