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/maps/pismo.c | 285 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 285 insertions(+) create mode 100644 drivers/mtd/maps/pismo.c (limited to 'drivers/mtd/maps/pismo.c') diff --git a/drivers/mtd/maps/pismo.c b/drivers/mtd/maps/pismo.c new file mode 100644 index 000000000..5fcefcd0b --- /dev/null +++ b/drivers/mtd/maps/pismo.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PISMO memory driver - http://www.pismoworld.org/ + * + * For ARM Realview and Versatile platforms + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PISMO_NUM_CS 5 + +struct pismo_cs_block { + u8 type; + u8 width; + __le16 access; + __le32 size; + u32 reserved[2]; + char device[32]; +} __packed; + +struct pismo_eeprom { + struct pismo_cs_block cs[PISMO_NUM_CS]; + char board[15]; + u8 sum; +} __packed; + +struct pismo_mem { + phys_addr_t base; + u32 size; + u16 access; + u8 width; + u8 type; +}; + +struct pismo_data { + struct i2c_client *client; + void (*vpp)(void *, int); + void *vpp_data; + struct platform_device *dev[PISMO_NUM_CS]; +}; + +static void pismo_set_vpp(struct platform_device *pdev, int on) +{ + struct i2c_client *client = to_i2c_client(pdev->dev.parent); + struct pismo_data *pismo = i2c_get_clientdata(client); + + pismo->vpp(pismo->vpp_data, on); +} + +static unsigned int pismo_width_to_bytes(unsigned int width) +{ + width &= 15; + if (width > 2) + return 0; + return 1 << width; +} + +static int pismo_eeprom_read(struct i2c_client *client, void *buf, u8 addr, + size_t size) +{ + int ret; + struct i2c_msg msg[] = { + { + .addr = client->addr, + .len = sizeof(addr), + .buf = &addr, + }, { + .addr = client->addr, + .flags = I2C_M_RD, + .len = size, + .buf = buf, + }, + }; + + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + + return ret == ARRAY_SIZE(msg) ? size : -EIO; +} + +static int pismo_add_device(struct pismo_data *pismo, int i, + struct pismo_mem *region, const char *name, + void *pdata, size_t psize) +{ + struct platform_device *dev; + struct resource res = { }; + phys_addr_t base = region->base; + int ret; + + if (base == ~0) + return -ENXIO; + + res.start = base; + res.end = base + region->size - 1; + res.flags = IORESOURCE_MEM; + + dev = platform_device_alloc(name, i); + if (!dev) + return -ENOMEM; + dev->dev.parent = &pismo->client->dev; + + do { + ret = platform_device_add_resources(dev, &res, 1); + if (ret) + break; + + ret = platform_device_add_data(dev, pdata, psize); + if (ret) + break; + + ret = platform_device_add(dev); + if (ret) + break; + + pismo->dev[i] = dev; + return 0; + } while (0); + + platform_device_put(dev); + return ret; +} + +static int pismo_add_nor(struct pismo_data *pismo, int i, + struct pismo_mem *region) +{ + struct physmap_flash_data data = { + .width = region->width, + }; + + if (pismo->vpp) + data.set_vpp = pismo_set_vpp; + + return pismo_add_device(pismo, i, region, "physmap-flash", + &data, sizeof(data)); +} + +static int pismo_add_sram(struct pismo_data *pismo, int i, + struct pismo_mem *region) +{ + struct platdata_mtd_ram data = { + .bankwidth = region->width, + }; + + return pismo_add_device(pismo, i, region, "mtd-ram", + &data, sizeof(data)); +} + +static void pismo_add_one(struct pismo_data *pismo, int i, + const struct pismo_cs_block *cs, phys_addr_t base) +{ + struct device *dev = &pismo->client->dev; + struct pismo_mem region; + + region.base = base; + region.type = cs->type; + region.width = pismo_width_to_bytes(cs->width); + region.access = le16_to_cpu(cs->access); + region.size = le32_to_cpu(cs->size); + + if (region.width == 0) { + dev_err(dev, "cs%u: bad width: %02x, ignoring\n", i, cs->width); + return; + } + + /* + * FIXME: may need to the platforms memory controller here, but at + * the moment we assume that it has already been correctly setup. + * The memory controller can also tell us the base address as well. + */ + + dev_info(dev, "cs%u: %.32s: type %02x access %u00ps size %uK\n", + i, cs->device, region.type, region.access, region.size / 1024); + + switch (region.type) { + case 0: + break; + case 1: + /* static DOC */ + break; + case 2: + /* static NOR */ + pismo_add_nor(pismo, i, ®ion); + break; + case 3: + /* static RAM */ + pismo_add_sram(pismo, i, ®ion); + break; + } +} + +static void pismo_remove(struct i2c_client *client) +{ + struct pismo_data *pismo = i2c_get_clientdata(client); + int i; + + for (i = 0; i < ARRAY_SIZE(pismo->dev); i++) + platform_device_unregister(pismo->dev[i]); + + kfree(pismo); +} + +static int pismo_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pismo_pdata *pdata = client->dev.platform_data; + struct pismo_eeprom eeprom; + struct pismo_data *pismo; + int ret, i; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "functionality mismatch\n"); + return -EIO; + } + + pismo = kzalloc(sizeof(*pismo), GFP_KERNEL); + if (!pismo) + return -ENOMEM; + + pismo->client = client; + if (pdata) { + pismo->vpp = pdata->set_vpp; + pismo->vpp_data = pdata->vpp_data; + } + i2c_set_clientdata(client, pismo); + + ret = pismo_eeprom_read(client, &eeprom, 0, sizeof(eeprom)); + if (ret < 0) { + dev_err(&client->dev, "error reading EEPROM: %d\n", ret); + goto exit_free; + } + + dev_info(&client->dev, "%.15s board found\n", eeprom.board); + + for (i = 0; i < ARRAY_SIZE(eeprom.cs); i++) + if (eeprom.cs[i].type != 0xff) + pismo_add_one(pismo, i, &eeprom.cs[i], + pdata->cs_addrs[i]); + + return 0; + + exit_free: + kfree(pismo); + return ret; +} + +static const struct i2c_device_id pismo_id[] = { + { "pismo" }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, pismo_id); + +static struct i2c_driver pismo_driver = { + .driver = { + .name = "pismo", + }, + .probe = pismo_probe, + .remove = pismo_remove, + .id_table = pismo_id, +}; + +static int __init pismo_init(void) +{ + BUILD_BUG_ON(sizeof(struct pismo_cs_block) != 48); + BUILD_BUG_ON(sizeof(struct pismo_eeprom) != 256); + + return i2c_add_driver(&pismo_driver); +} +module_init(pismo_init); + +static void __exit pismo_exit(void) +{ + i2c_del_driver(&pismo_driver); +} +module_exit(pismo_exit); + +MODULE_AUTHOR("Russell King "); +MODULE_DESCRIPTION("PISMO memory driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3