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/mtd/devices/ms02-nv.c | 306 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 drivers/mtd/devices/ms02-nv.c (limited to 'drivers/mtd/devices/ms02-nv.c') diff --git a/drivers/mtd/devices/ms02-nv.c b/drivers/mtd/devices/ms02-nv.c new file mode 100644 index 000000000..08f76ff83 --- /dev/null +++ b/drivers/mtd/devices/ms02-nv.c @@ -0,0 +1,306 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2001 Maciej W. Rozycki + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "ms02-nv.h" + + +static char version[] __initdata = + "ms02-nv.c: v.1.0.0 13 Aug 2001 Maciej W. Rozycki.\n"; + +MODULE_AUTHOR("Maciej W. Rozycki "); +MODULE_DESCRIPTION("DEC MS02-NV NVRAM module driver"); +MODULE_LICENSE("GPL"); + + +/* + * Addresses we probe for an MS02-NV at. Modules may be located + * at any 8MiB boundary within a 0MiB up to 112MiB range or at any 32MiB + * boundary within a 0MiB up to 448MiB range. We don't support a module + * at 0MiB, though. + */ +static ulong ms02nv_addrs[] __initdata = { + 0x07000000, 0x06800000, 0x06000000, 0x05800000, 0x05000000, + 0x04800000, 0x04000000, 0x03800000, 0x03000000, 0x02800000, + 0x02000000, 0x01800000, 0x01000000, 0x00800000 +}; + +static const char ms02nv_name[] = "DEC MS02-NV NVRAM"; +static const char ms02nv_res_diag_ram[] = "Diagnostic RAM"; +static const char ms02nv_res_user_ram[] = "General-purpose RAM"; +static const char ms02nv_res_csr[] = "Control and status register"; + +static struct mtd_info *root_ms02nv_mtd; + + +static int ms02nv_read(struct mtd_info *mtd, loff_t from, + size_t len, size_t *retlen, u_char *buf) +{ + struct ms02nv_private *mp = mtd->priv; + + memcpy(buf, mp->uaddr + from, len); + *retlen = len; + return 0; +} + +static int ms02nv_write(struct mtd_info *mtd, loff_t to, + size_t len, size_t *retlen, const u_char *buf) +{ + struct ms02nv_private *mp = mtd->priv; + + memcpy(mp->uaddr + to, buf, len); + *retlen = len; + return 0; +} + + +static inline uint ms02nv_probe_one(ulong addr) +{ + ms02nv_uint *ms02nv_diagp; + ms02nv_uint *ms02nv_magicp; + uint ms02nv_diag; + uint ms02nv_magic; + size_t size; + + int err; + + /* + * The firmware writes MS02NV_ID at MS02NV_MAGIC and also + * a diagnostic status at MS02NV_DIAG. + */ + ms02nv_diagp = (ms02nv_uint *)(CKSEG1ADDR(addr + MS02NV_DIAG)); + ms02nv_magicp = (ms02nv_uint *)(CKSEG1ADDR(addr + MS02NV_MAGIC)); + err = get_dbe(ms02nv_magic, ms02nv_magicp); + if (err) + return 0; + if (ms02nv_magic != MS02NV_ID) + return 0; + + ms02nv_diag = *ms02nv_diagp; + size = (ms02nv_diag & MS02NV_DIAG_SIZE_MASK) << MS02NV_DIAG_SIZE_SHIFT; + if (size > MS02NV_CSR) + size = MS02NV_CSR; + + return size; +} + +static int __init ms02nv_init_one(ulong addr) +{ + struct mtd_info *mtd; + struct ms02nv_private *mp; + struct resource *mod_res; + struct resource *diag_res; + struct resource *user_res; + struct resource *csr_res; + ulong fixaddr; + size_t size, fixsize; + + static int version_printed; + + int ret = -ENODEV; + + /* The module decodes 8MiB of address space. */ + mod_res = kzalloc(sizeof(*mod_res), GFP_KERNEL); + if (!mod_res) + return -ENOMEM; + + mod_res->name = ms02nv_name; + mod_res->start = addr; + mod_res->end = addr + MS02NV_SLOT_SIZE - 1; + mod_res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; + if (request_resource(&iomem_resource, mod_res) < 0) + goto err_out_mod_res; + + size = ms02nv_probe_one(addr); + if (!size) + goto err_out_mod_res_rel; + + if (!version_printed) { + printk(KERN_INFO "%s", version); + version_printed = 1; + } + + ret = -ENOMEM; + mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); + if (!mtd) + goto err_out_mod_res_rel; + mp = kzalloc(sizeof(*mp), GFP_KERNEL); + if (!mp) + goto err_out_mtd; + + mtd->priv = mp; + mp->resource.module = mod_res; + + /* Firmware's diagnostic NVRAM area. */ + diag_res = kzalloc(sizeof(*diag_res), GFP_KERNEL); + if (!diag_res) + goto err_out_mp; + + diag_res->name = ms02nv_res_diag_ram; + diag_res->start = addr; + diag_res->end = addr + MS02NV_RAM - 1; + diag_res->flags = IORESOURCE_BUSY; + request_resource(mod_res, diag_res); + + mp->resource.diag_ram = diag_res; + + /* User-available general-purpose NVRAM area. */ + user_res = kzalloc(sizeof(*user_res), GFP_KERNEL); + if (!user_res) + goto err_out_diag_res; + + user_res->name = ms02nv_res_user_ram; + user_res->start = addr + MS02NV_RAM; + user_res->end = addr + size - 1; + user_res->flags = IORESOURCE_BUSY; + request_resource(mod_res, user_res); + + mp->resource.user_ram = user_res; + + /* Control and status register. */ + csr_res = kzalloc(sizeof(*csr_res), GFP_KERNEL); + if (!csr_res) + goto err_out_user_res; + + csr_res->name = ms02nv_res_csr; + csr_res->start = addr + MS02NV_CSR; + csr_res->end = addr + MS02NV_CSR + 3; + csr_res->flags = IORESOURCE_BUSY; + request_resource(mod_res, csr_res); + + mp->resource.csr = csr_res; + + mp->addr = phys_to_virt(addr); + mp->size = size; + + /* + * Hide the firmware's diagnostic area. It may get destroyed + * upon a reboot. Take paging into account for mapping support. + */ + fixaddr = (addr + MS02NV_RAM + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); + fixsize = (size - (fixaddr - addr)) & ~(PAGE_SIZE - 1); + mp->uaddr = phys_to_virt(fixaddr); + + mtd->type = MTD_RAM; + mtd->flags = MTD_CAP_RAM; + mtd->size = fixsize; + mtd->name = ms02nv_name; + mtd->owner = THIS_MODULE; + mtd->_read = ms02nv_read; + mtd->_write = ms02nv_write; + mtd->writesize = 1; + + ret = -EIO; + if (mtd_device_register(mtd, NULL, 0)) { + printk(KERN_ERR + "ms02-nv: Unable to register MTD device, aborting!\n"); + goto err_out_csr_res; + } + + printk(KERN_INFO "mtd%d: %s at 0x%08lx, size %zuMiB.\n", + mtd->index, ms02nv_name, addr, size >> 20); + + mp->next = root_ms02nv_mtd; + root_ms02nv_mtd = mtd; + + return 0; + + +err_out_csr_res: + release_resource(csr_res); + kfree(csr_res); +err_out_user_res: + release_resource(user_res); + kfree(user_res); +err_out_diag_res: + release_resource(diag_res); + kfree(diag_res); +err_out_mp: + kfree(mp); +err_out_mtd: + kfree(mtd); +err_out_mod_res_rel: + release_resource(mod_res); +err_out_mod_res: + kfree(mod_res); + return ret; +} + +static void __exit ms02nv_remove_one(void) +{ + struct mtd_info *mtd = root_ms02nv_mtd; + struct ms02nv_private *mp = mtd->priv; + + root_ms02nv_mtd = mp->next; + + mtd_device_unregister(mtd); + + release_resource(mp->resource.csr); + kfree(mp->resource.csr); + release_resource(mp->resource.user_ram); + kfree(mp->resource.user_ram); + release_resource(mp->resource.diag_ram); + kfree(mp->resource.diag_ram); + release_resource(mp->resource.module); + kfree(mp->resource.module); + kfree(mp); + kfree(mtd); +} + + +static int __init ms02nv_init(void) +{ + volatile u32 *csr; + uint stride = 0; + int count = 0; + int i; + + switch (mips_machtype) { + case MACH_DS5000_200: + csr = (volatile u32 *)CKSEG1ADDR(KN02_SLOT_BASE + KN02_CSR); + if (*csr & KN02_CSR_BNK32M) + stride = 2; + break; + case MACH_DS5000_2X0: + case MACH_DS5900: + csr = (volatile u32 *)CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_MCR); + if (*csr & KN03_MCR_BNK32M) + stride = 2; + break; + default: + return -ENODEV; + } + + for (i = 0; i < ARRAY_SIZE(ms02nv_addrs); i++) + if (!ms02nv_init_one(ms02nv_addrs[i] << stride)) + count++; + + return (count > 0) ? 0 : -ENODEV; +} + +static void __exit ms02nv_cleanup(void) +{ + while (root_ms02nv_mtd) + ms02nv_remove_one(); +} + + +module_init(ms02nv_init); +module_exit(ms02nv_cleanup); -- cgit v1.2.3