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/powerpc/boot/cpm-serial.c | 295 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 arch/powerpc/boot/cpm-serial.c (limited to 'arch/powerpc/boot/cpm-serial.c') diff --git a/arch/powerpc/boot/cpm-serial.c b/arch/powerpc/boot/cpm-serial.c new file mode 100644 index 000000000..dfb56829c --- /dev/null +++ b/arch/powerpc/boot/cpm-serial.c @@ -0,0 +1,295 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CPM serial console support. + * + * Copyright 2007 Freescale Semiconductor, Inc. + * Author: Scott Wood + * + * It is assumed that the firmware (or the platform file) has already set + * up the port. + */ + +#include "types.h" +#include "io.h" +#include "ops.h" +#include "page.h" + +struct cpm_scc { + u32 gsmrl; + u32 gsmrh; + u16 psmr; + u8 res1[2]; + u16 todr; + u16 dsr; + u16 scce; + u8 res2[2]; + u16 sccm; + u8 res3; + u8 sccs; + u8 res4[8]; +}; + +struct cpm_smc { + u8 res1[2]; + u16 smcmr; + u8 res2[2]; + u8 smce; + u8 res3[3]; + u8 smcm; + u8 res4[5]; +}; + +struct cpm_param { + u16 rbase; + u16 tbase; + u8 rfcr; + u8 tfcr; + u16 mrblr; + u32 rstate; + u8 res1[4]; + u16 rbptr; + u8 res2[6]; + u32 tstate; + u8 res3[4]; + u16 tbptr; + u8 res4[6]; + u16 maxidl; + u16 idlc; + u16 brkln; + u16 brkec; + u16 brkcr; + u16 rmask; + u8 res5[4]; +}; + +struct cpm_bd { + u16 sc; /* Status and Control */ + u16 len; /* Data length in buffer */ + u8 *addr; /* Buffer address in host memory */ +}; + +static void *cpcr; +static struct cpm_param *param; +static struct cpm_smc *smc; +static struct cpm_scc *scc; +static struct cpm_bd *tbdf, *rbdf; +static u32 cpm_cmd; +static void *cbd_addr; +static u32 cbd_offset; + +static void (*do_cmd)(int op); +static void (*enable_port)(void); +static void (*disable_port)(void); + +#define CPM_CMD_STOP_TX 4 +#define CPM_CMD_RESTART_TX 6 +#define CPM_CMD_INIT_RX_TX 0 + +static void cpm1_cmd(int op) +{ + while (in_be16(cpcr) & 1) + ; + + out_be16(cpcr, (op << 8) | cpm_cmd | 1); + + while (in_be16(cpcr) & 1) + ; +} + +static void cpm2_cmd(int op) +{ + while (in_be32(cpcr) & 0x10000) + ; + + out_be32(cpcr, op | cpm_cmd | 0x10000); + + while (in_be32(cpcr) & 0x10000) + ; +} + +static void smc_disable_port(void) +{ + do_cmd(CPM_CMD_STOP_TX); + out_be16(&smc->smcmr, in_be16(&smc->smcmr) & ~3); +} + +static void scc_disable_port(void) +{ + do_cmd(CPM_CMD_STOP_TX); + out_be32(&scc->gsmrl, in_be32(&scc->gsmrl) & ~0x30); +} + +static void smc_enable_port(void) +{ + out_be16(&smc->smcmr, in_be16(&smc->smcmr) | 3); + do_cmd(CPM_CMD_RESTART_TX); +} + +static void scc_enable_port(void) +{ + out_be32(&scc->gsmrl, in_be32(&scc->gsmrl) | 0x30); + do_cmd(CPM_CMD_RESTART_TX); +} + +static int cpm_serial_open(void) +{ + disable_port(); + + out_8(¶m->rfcr, 0x10); + out_8(¶m->tfcr, 0x10); + out_be16(¶m->mrblr, 1); + out_be16(¶m->maxidl, 0); + out_be16(¶m->brkec, 0); + out_be16(¶m->brkln, 0); + out_be16(¶m->brkcr, 0); + + rbdf = cbd_addr; + rbdf->addr = (u8 *)rbdf - 1; + rbdf->sc = 0xa000; + rbdf->len = 1; + + tbdf = rbdf + 1; + tbdf->addr = (u8 *)rbdf - 2; + tbdf->sc = 0x2000; + tbdf->len = 1; + + sync(); + out_be16(¶m->rbase, cbd_offset); + out_be16(¶m->tbase, cbd_offset + sizeof(struct cpm_bd)); + + do_cmd(CPM_CMD_INIT_RX_TX); + + enable_port(); + return 0; +} + +static void cpm_serial_putc(unsigned char c) +{ + while (tbdf->sc & 0x8000) + barrier(); + + sync(); + + tbdf->addr[0] = c; + eieio(); + tbdf->sc |= 0x8000; +} + +static unsigned char cpm_serial_tstc(void) +{ + barrier(); + return !(rbdf->sc & 0x8000); +} + +static unsigned char cpm_serial_getc(void) +{ + unsigned char c; + + while (!cpm_serial_tstc()) + ; + + sync(); + c = rbdf->addr[0]; + eieio(); + rbdf->sc |= 0x8000; + + return c; +} + +int cpm_console_init(void *devp, struct serial_console_data *scdp) +{ + void *vreg[2]; + u32 reg[2]; + int is_smc = 0, is_cpm2 = 0; + void *parent, *muram; + void *muram_addr; + unsigned long muram_offset, muram_size; + + if (dt_is_compatible(devp, "fsl,cpm1-smc-uart")) { + is_smc = 1; + } else if (dt_is_compatible(devp, "fsl,cpm2-scc-uart")) { + is_cpm2 = 1; + } else if (dt_is_compatible(devp, "fsl,cpm2-smc-uart")) { + is_cpm2 = 1; + is_smc = 1; + } + + if (is_smc) { + enable_port = smc_enable_port; + disable_port = smc_disable_port; + } else { + enable_port = scc_enable_port; + disable_port = scc_disable_port; + } + + if (is_cpm2) + do_cmd = cpm2_cmd; + else + do_cmd = cpm1_cmd; + + if (getprop(devp, "fsl,cpm-command", &cpm_cmd, 4) < 4) + return -1; + + if (dt_get_virtual_reg(devp, vreg, 2) < 2) + return -1; + + if (is_smc) + smc = vreg[0]; + else + scc = vreg[0]; + + param = vreg[1]; + + parent = get_parent(devp); + if (!parent) + return -1; + + if (dt_get_virtual_reg(parent, &cpcr, 1) < 1) + return -1; + + muram = finddevice("/soc/cpm/muram/data"); + if (!muram) + return -1; + + /* For bootwrapper-compatible device trees, we assume that the first + * entry has at least 128 bytes, and that #address-cells/#data-cells + * is one for both parent and child. + */ + + if (dt_get_virtual_reg(muram, &muram_addr, 1) < 1) + return -1; + + if (getprop(muram, "reg", reg, 8) < 8) + return -1; + + muram_offset = reg[0]; + muram_size = reg[1]; + + /* Store the buffer descriptors at the end of the first muram chunk. + * For SMC ports on CPM2-based platforms, relocate the parameter RAM + * just before the buffer descriptors. + */ + + cbd_offset = muram_offset + muram_size - 2 * sizeof(struct cpm_bd); + + if (is_cpm2 && is_smc) { + u16 *smc_base = (u16 *)param; + u16 pram_offset; + + pram_offset = cbd_offset - 64; + pram_offset = _ALIGN_DOWN(pram_offset, 64); + + disable_port(); + out_be16(smc_base, pram_offset); + param = muram_addr - muram_offset + pram_offset; + } + + cbd_addr = muram_addr - muram_offset + cbd_offset; + + scdp->open = cpm_serial_open; + scdp->putc = cpm_serial_putc; + scdp->getc = cpm_serial_getc; + scdp->tstc = cpm_serial_tstc; + + return 0; +} -- cgit v1.2.3