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/media/pci/ddbridge/ddbridge-i2c.c | 225 ++++++++++++++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 drivers/media/pci/ddbridge/ddbridge-i2c.c (limited to 'drivers/media/pci/ddbridge/ddbridge-i2c.c') diff --git a/drivers/media/pci/ddbridge/ddbridge-i2c.c b/drivers/media/pci/ddbridge/ddbridge-i2c.c new file mode 100644 index 000000000..c894be180 --- /dev/null +++ b/drivers/media/pci/ddbridge/ddbridge-i2c.c @@ -0,0 +1,225 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ddbridge-i2c.c: Digital Devices bridge i2c driver + * + * Copyright (C) 2010-2017 Digital Devices GmbH + * Ralph Metzler + * Marcus Metzler + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ddbridge.h" +#include "ddbridge-i2c.h" +#include "ddbridge-regs.h" +#include "ddbridge-io.h" + +/******************************************************************************/ + +static int ddb_i2c_cmd(struct ddb_i2c *i2c, u32 adr, u32 cmd) +{ + struct ddb *dev = i2c->dev; + unsigned long stat; + u32 val; + + ddbwritel(dev, (adr << 9) | cmd, i2c->regs + I2C_COMMAND); + stat = wait_for_completion_timeout(&i2c->completion, HZ); + val = ddbreadl(dev, i2c->regs + I2C_COMMAND); + if (stat == 0) { + dev_err(dev->dev, "I2C timeout, card %d, port %d, link %u\n", + dev->nr, i2c->nr, i2c->link); + { + u32 istat = ddbreadl(dev, INTERRUPT_STATUS); + + dev_err(dev->dev, "DDBridge IRS %08x\n", istat); + if (i2c->link) { + u32 listat = ddbreadl(dev, + DDB_LINK_TAG(i2c->link) | + INTERRUPT_STATUS); + + dev_err(dev->dev, "DDBridge link %u IRS %08x\n", + i2c->link, listat); + } + if (istat & 1) { + ddbwritel(dev, istat & 1, INTERRUPT_ACK); + } else { + u32 mon = ddbreadl(dev, + i2c->regs + I2C_MONITOR); + + dev_err(dev->dev, "I2C cmd=%08x mon=%08x\n", + val, mon); + } + } + return -EIO; + } + val &= 0x70000; + if (val == 0x20000) + dev_err(dev->dev, "I2C bus error\n"); + if (val) + return -EIO; + return 0; +} + +static int ddb_i2c_master_xfer(struct i2c_adapter *adapter, + struct i2c_msg msg[], int num) +{ + struct ddb_i2c *i2c = (struct ddb_i2c *)i2c_get_adapdata(adapter); + struct ddb *dev = i2c->dev; + u8 addr = 0; + + addr = msg[0].addr; + if (msg[0].len > i2c->bsize) + return -EIO; + switch (num) { + case 1: + if (msg[0].flags & I2C_M_RD) { + ddbwritel(dev, msg[0].len << 16, + i2c->regs + I2C_TASKLENGTH); + if (ddb_i2c_cmd(i2c, addr, 3)) + break; + ddbcpyfrom(dev, msg[0].buf, + i2c->rbuf, msg[0].len); + return num; + } + ddbcpyto(dev, i2c->wbuf, msg[0].buf, msg[0].len); + ddbwritel(dev, msg[0].len, i2c->regs + I2C_TASKLENGTH); + if (ddb_i2c_cmd(i2c, addr, 2)) + break; + return num; + case 2: + if ((msg[0].flags & I2C_M_RD) == I2C_M_RD) + break; + if ((msg[1].flags & I2C_M_RD) != I2C_M_RD) + break; + if (msg[1].len > i2c->bsize) + break; + ddbcpyto(dev, i2c->wbuf, msg[0].buf, msg[0].len); + ddbwritel(dev, msg[0].len | (msg[1].len << 16), + i2c->regs + I2C_TASKLENGTH); + if (ddb_i2c_cmd(i2c, addr, 1)) + break; + ddbcpyfrom(dev, msg[1].buf, + i2c->rbuf, + msg[1].len); + return num; + default: + break; + } + return -EIO; +} + +static u32 ddb_i2c_functionality(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm ddb_i2c_algo = { + .master_xfer = ddb_i2c_master_xfer, + .functionality = ddb_i2c_functionality, +}; + +void ddb_i2c_release(struct ddb *dev) +{ + int i; + struct ddb_i2c *i2c; + + for (i = 0; i < dev->i2c_num; i++) { + i2c = &dev->i2c[i]; + i2c_del_adapter(&i2c->adap); + } +} + +static void i2c_handler(void *priv) +{ + struct ddb_i2c *i2c = (struct ddb_i2c *)priv; + + complete(&i2c->completion); +} + +static int ddb_i2c_add(struct ddb *dev, struct ddb_i2c *i2c, + const struct ddb_regmap *regmap, int link, + int i, int num) +{ + struct i2c_adapter *adap; + + i2c->nr = i; + i2c->dev = dev; + i2c->link = link; + i2c->bsize = regmap->i2c_buf->size; + i2c->wbuf = DDB_LINK_TAG(link) | + (regmap->i2c_buf->base + i2c->bsize * i); + i2c->rbuf = i2c->wbuf; /* + i2c->bsize / 2 */ + i2c->regs = DDB_LINK_TAG(link) | + (regmap->i2c->base + regmap->i2c->size * i); + ddbwritel(dev, I2C_SPEED_100, i2c->regs + I2C_TIMING); + ddbwritel(dev, ((i2c->rbuf & 0xffff) << 16) | (i2c->wbuf & 0xffff), + i2c->regs + I2C_TASKADDRESS); + init_completion(&i2c->completion); + + adap = &i2c->adap; + i2c_set_adapdata(adap, i2c); +#ifdef I2C_ADAP_CLASS_TV_DIGITAL + adap->class = I2C_ADAP_CLASS_TV_DIGITAL | I2C_CLASS_TV_ANALOG; +#else +#ifdef I2C_CLASS_TV_ANALOG + adap->class = I2C_CLASS_TV_ANALOG; +#endif +#endif + snprintf(adap->name, I2C_NAME_SIZE, "ddbridge_%02x.%x.%x", + dev->nr, i2c->link, i); + adap->algo = &ddb_i2c_algo; + adap->algo_data = (void *)i2c; + adap->dev.parent = dev->dev; + return i2c_add_adapter(adap); +} + +int ddb_i2c_init(struct ddb *dev) +{ + int stat = 0; + u32 i, j, num = 0, l, base; + struct ddb_i2c *i2c; + struct i2c_adapter *adap; + const struct ddb_regmap *regmap; + + for (l = 0; l < DDB_MAX_LINK; l++) { + if (!dev->link[l].info) + continue; + regmap = dev->link[l].info->regmap; + if (!regmap || !regmap->i2c) + continue; + base = regmap->irq_base_i2c; + for (i = 0; i < regmap->i2c->num; i++) { + if (!(dev->link[l].info->i2c_mask & (1 << i))) + continue; + i2c = &dev->i2c[num]; + ddb_irq_set(dev, l, i + base, i2c_handler, i2c); + stat = ddb_i2c_add(dev, i2c, regmap, l, i, num); + if (stat) + break; + num++; + } + } + if (stat) { + for (j = 0; j < num; j++) { + i2c = &dev->i2c[j]; + adap = &i2c->adap; + i2c_del_adapter(adap); + } + } else { + dev->i2c_num = num; + } + + return stat; +} -- cgit v1.2.3