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/net/wireless/ath/ath5k/pci.c | 341 +++++++++++++++++++++++++++++++++++ 1 file changed, 341 insertions(+) create mode 100644 drivers/net/wireless/ath/ath5k/pci.c (limited to 'drivers/net/wireless/ath/ath5k/pci.c') diff --git a/drivers/net/wireless/ath/ath5k/pci.c b/drivers/net/wireless/ath/ath5k/pci.c new file mode 100644 index 000000000..86b8cb975 --- /dev/null +++ b/drivers/net/wireless/ath/ath5k/pci.c @@ -0,0 +1,341 @@ +/* + * Copyright (c) 2008-2009 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include "../ath.h" +#include "ath5k.h" +#include "debug.h" +#include "base.h" +#include "reg.h" + +/* Known PCI ids */ +static const struct pci_device_id ath5k_pci_id_table[] = { + { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */ + { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */ + { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/ + { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */ + { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */ + { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */ + { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */ + { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */ + { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 compatible */ + { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 compatible */ + { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 compatible */ + { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 compatible */ + { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 compatible */ + { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 compatible */ + { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */ + { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */ + { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */ + { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */ + { PCI_VDEVICE(ATHEROS, 0xff1b) }, /* AR5BXB63 */ + { 0 } +}; +MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table); + +/* return bus cachesize in 4B word units */ +static void ath5k_pci_read_cachesize(struct ath_common *common, int *csz) +{ + struct ath5k_hw *ah = (struct ath5k_hw *) common->priv; + u8 u8tmp; + + pci_read_config_byte(ah->pdev, PCI_CACHE_LINE_SIZE, &u8tmp); + *csz = (int)u8tmp; + + /* + * This check was put in to avoid "unpleasant" consequences if + * the bootrom has not fully initialized all PCI devices. + * Sometimes the cache line size register is not set + */ + + if (*csz == 0) + *csz = L1_CACHE_BYTES >> 2; /* Use the default size */ +} + +/* + * Read from eeprom + */ +static bool +ath5k_pci_eeprom_read(struct ath_common *common, u32 offset, u16 *data) +{ + struct ath5k_hw *ah = (struct ath5k_hw *) common->ah; + u32 status, timeout; + + /* + * Initialize EEPROM access + */ + if (ah->ah_version == AR5K_AR5210) { + AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_EEAE); + (void)ath5k_hw_reg_read(ah, AR5K_EEPROM_BASE + (4 * offset)); + } else { + ath5k_hw_reg_write(ah, offset, AR5K_EEPROM_BASE); + AR5K_REG_ENABLE_BITS(ah, AR5K_EEPROM_CMD, + AR5K_EEPROM_CMD_READ); + } + + for (timeout = AR5K_TUNE_REGISTER_TIMEOUT; timeout > 0; timeout--) { + status = ath5k_hw_reg_read(ah, AR5K_EEPROM_STATUS); + if (status & AR5K_EEPROM_STAT_RDDONE) { + if (status & AR5K_EEPROM_STAT_RDERR) + return false; + *data = (u16)(ath5k_hw_reg_read(ah, AR5K_EEPROM_DATA) & + 0xffff); + return true; + } + usleep_range(15, 20); + } + + return false; +} + +int ath5k_hw_read_srev(struct ath5k_hw *ah) +{ + ah->ah_mac_srev = ath5k_hw_reg_read(ah, AR5K_SREV); + return 0; +} + +/* + * Read the MAC address from eeprom or platform_data + */ +static int ath5k_pci_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac) +{ + u8 mac_d[ETH_ALEN] = {}; + u32 total, offset; + u16 data; + int octet; + + AR5K_EEPROM_READ(0x20, data); + + for (offset = 0x1f, octet = 0, total = 0; offset >= 0x1d; offset--) { + AR5K_EEPROM_READ(offset, data); + + total += data; + mac_d[octet + 1] = data & 0xff; + mac_d[octet] = data >> 8; + octet += 2; + } + + if (!total || total == 3 * 0xffff) + return -EINVAL; + + memcpy(mac, mac_d, ETH_ALEN); + + return 0; +} + + +/* Common ath_bus_opts structure */ +static const struct ath_bus_ops ath_pci_bus_ops = { + .ath_bus_type = ATH_PCI, + .read_cachesize = ath5k_pci_read_cachesize, + .eeprom_read = ath5k_pci_eeprom_read, + .eeprom_read_mac = ath5k_pci_eeprom_read_mac, +}; + +/********************\ +* PCI Initialization * +\********************/ + +static int +ath5k_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + void __iomem *mem; + struct ath5k_hw *ah; + struct ieee80211_hw *hw; + int ret; + u8 csz; + + /* + * L0s needs to be disabled on all ath5k cards. + * + * For distributions shipping with CONFIG_PCIEASPM (this will be enabled + * by default in the future in 2.6.36) this will also mean both L1 and + * L0s will be disabled when a pre 1.1 PCIe device is detected. We do + * know L1 works correctly even for all ath5k pre 1.1 PCIe devices + * though but cannot currently undue the effect of a blacklist, for + * details you can read pcie_aspm_sanity_check() and see how it adjusts + * the device link capability. + * + * It may be possible in the future to implement some PCI API to allow + * drivers to override blacklists for pre 1.1 PCIe but for now it is + * best to accept that both L0s and L1 will be disabled completely for + * distributions shipping with CONFIG_PCIEASPM rather than having this + * issue present. Motivation for adding this new API will be to help + * with power consumption for some of these devices. + */ + pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S); + + ret = pci_enable_device(pdev); + if (ret) { + dev_err(&pdev->dev, "can't enable device\n"); + goto err; + } + + /* XXX 32-bit addressing only */ + ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(&pdev->dev, "32-bit DMA not available\n"); + goto err_dis; + } + + /* + * Cache line size is used to size and align various + * structures used to communicate with the hardware. + */ + pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz); + if (csz == 0) { + /* + * Linux 2.4.18 (at least) writes the cache line size + * register as a 16-bit wide register which is wrong. + * We must have this setup properly for rx buffer + * DMA to work so force a reasonable value here if it + * comes up zero. + */ + csz = L1_CACHE_BYTES >> 2; + pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz); + } + /* + * The default setting of latency timer yields poor results, + * set it to the value used by other systems. It may be worth + * tweaking this setting more. + */ + pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8); + + /* Enable bus mastering */ + pci_set_master(pdev); + + /* + * Disable the RETRY_TIMEOUT register (0x41) to keep + * PCI Tx retries from interfering with C3 CPU state. + */ + pci_write_config_byte(pdev, 0x41, 0); + + ret = pci_request_region(pdev, 0, "ath5k"); + if (ret) { + dev_err(&pdev->dev, "cannot reserve PCI memory region\n"); + goto err_dis; + } + + mem = pci_iomap(pdev, 0, 0); + if (!mem) { + dev_err(&pdev->dev, "cannot remap PCI memory region\n"); + ret = -EIO; + goto err_reg; + } + + /* + * Allocate hw (mac80211 main struct) + * and hw->priv (driver private data) + */ + hw = ieee80211_alloc_hw(sizeof(*ah), &ath5k_hw_ops); + if (hw == NULL) { + dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n"); + ret = -ENOMEM; + goto err_map; + } + + dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy)); + + ah = hw->priv; + ah->hw = hw; + ah->pdev = pdev; + ah->dev = &pdev->dev; + ah->irq = pdev->irq; + ah->devid = id->device; + ah->iobase = mem; /* So we can unmap it on detach */ + + /* Initialize */ + ret = ath5k_init_ah(ah, &ath_pci_bus_ops); + if (ret) + goto err_free; + + /* Set private data */ + pci_set_drvdata(pdev, hw); + + return 0; +err_free: + ieee80211_free_hw(hw); +err_map: + pci_iounmap(pdev, mem); +err_reg: + pci_release_region(pdev, 0); +err_dis: + pci_disable_device(pdev); +err: + return ret; +} + +static void +ath5k_pci_remove(struct pci_dev *pdev) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct ath5k_hw *ah = hw->priv; + + ath5k_deinit_ah(ah); + pci_iounmap(pdev, ah->iobase); + pci_release_region(pdev, 0); + pci_disable_device(pdev); + ieee80211_free_hw(hw); +} + +#ifdef CONFIG_PM_SLEEP +static int ath5k_pci_suspend(struct device *dev) +{ + struct ieee80211_hw *hw = dev_get_drvdata(dev); + struct ath5k_hw *ah = hw->priv; + + ath5k_led_off(ah); + return 0; +} + +static int ath5k_pci_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct ath5k_hw *ah = hw->priv; + + /* + * Suspend/Resume resets the PCI configuration space, so we have to + * re-disable the RETRY_TIMEOUT register (0x41) to keep + * PCI Tx retries from interfering with C3 CPU state + */ + pci_write_config_byte(pdev, 0x41, 0); + + ath5k_led_enable(ah); + return 0; +} + +static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume); +#define ATH5K_PM_OPS (&ath5k_pm_ops) +#else +#define ATH5K_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +static struct pci_driver ath5k_pci_driver = { + .name = KBUILD_MODNAME, + .id_table = ath5k_pci_id_table, + .probe = ath5k_pci_probe, + .remove = ath5k_pci_remove, + .driver.pm = ATH5K_PM_OPS, +}; + +module_pci_driver(ath5k_pci_driver); -- cgit v1.2.3