Merge tag 'net-next-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core
  ----

   - Support TCPv6 segmentation offload with super-segments larger than
     64k bytes using the IPv6 Jumbogram extension header (AKA BIG TCP).

   - Generalize skb freeing deferral to per-cpu lists, instead of
     per-socket lists.

   - Add a netdev statistic for packets dropped due to L2 address
     mismatch (rx_otherhost_dropped).

   - Continue work annotating skb drop reasons.

   - Accept alternative netdev names (ALT_IFNAME) in more netlink
     requests.

   - Add VLAN support for AF_PACKET SOCK_RAW GSO.

   - Allow receiving skb mark from the socket as a cmsg.

   - Enable memcg accounting for veth queues, sysctl tables and IPv6.

  BPF
  ---

   - Add libbpf support for User Statically-Defined Tracing (USDTs).

   - Speed up symbol resolution for kprobes multi-link attachments.

   - Support storing typed pointers to referenced and unreferenced
     objects in BPF maps.

   - Add support for BPF link iterator.

   - Introduce access to remote CPU map elements in BPF per-cpu map.

   - Allow middle-of-the-road settings for the
     kernel.unprivileged_bpf_disabled sysctl.

   - Implement basic types of dynamic pointers e.g. to allow for
     dynamically sized ringbuf reservations without extra memory copies.

  Protocols
  ---------

   - Retire port only listening_hash table, add a second bind table
     hashed by port and address. Avoid linear list walk when binding to
     very popular ports (e.g. 443).

   - Add bridge FDB bulk flush filtering support allowing user space to
     remove all FDB entries matching a condition.

   - Introduce accept_unsolicited_na sysctl for IPv6 to implement
     router-side changes for RFC9131.

   - Support for MPTCP path manager in user space.

   - Add MPTCP support for fallback to regular TCP for connections that
     have never connected additional subflows or transmitted
     out-of-sequence data (partial support for RFC8684 fallback).

   - Avoid races in MPTCP-level window tracking, stabilize and improve
     throughput.

   - Support lockless operation of GRE tunnels with seq numbers enabled.

   - WiFi support for host based BSS color collision detection.

   - Add support for SO_TXTIME/SCM_TXTIME on CAN sockets.

   - Support transmission w/o flow control in CAN ISOTP (ISO 15765-2).

   - Support zero-copy Tx with TLS 1.2 crypto offload (sendfile).

   - Allow matching on the number of VLAN tags via tc-flower.

   - Add tracepoint for tcp_set_ca_state().

  Driver API
  ----------

   - Improve error reporting from classifier and action offload.

   - Add support for listing line cards in switches (devlink).

   - Add helpers for reporting page pool statistics with ethtool -S.

   - Add support for reading clock cycles when using PTP virtual clocks,
     instead of having the driver convert to time before reporting. This
     makes it possible to report time from different vclocks.

   - Support configuring low-latency Tx descriptor push via ethtool.

   - Separate Clause 22 and Clause 45 MDIO accesses more explicitly.

  New hardware / drivers
  ----------------------

   - Ethernet:
      - Marvell's Octeon NIC PCI Endpoint support (octeon_ep)
      - Sunplus SP7021 SoC (sp7021_emac)
      - Add support for Renesas RZ/V2M (in ravb)
      - Add support for MediaTek mt7986 switches (in mtk_eth_soc)

   - Ethernet PHYs:
      - ADIN1100 industrial PHYs (w/ 10BASE-T1L and SQI reporting)
      - TI DP83TD510 PHY
      - Microchip LAN8742/LAN88xx PHYs

   - WiFi:
      - Driver for pureLiFi X, XL, XC devices (plfxlc)
      - Driver for Silicon Labs devices (wfx)
      - Support for WCN6750 (in ath11k)
      - Support Realtek 8852ce devices (in rtw89)

   - Mobile:
      - MediaTek T700 modems (Intel 5G 5000 M.2 cards)

   - CAN:
      - ctucanfd: add support for CTU CAN FD open-source IP core from
        Czech Technical University in Prague

  Drivers
  -------

   - Delete a number of old drivers still using virt_to_bus().

   - Ethernet NICs:
      - intel: support TSO on tunnels MPLS
      - broadcom: support multi-buffer XDP
      - nfp: support VF rate limiting
      - sfc: use hardware tx timestamps for more than PTP
      - mlx5: multi-port eswitch support
      - hyper-v: add support for XDP_REDIRECT
      - atlantic: XDP support (including multi-buffer)
      - macb: improve real-time perf by deferring Tx processing to NAPI

   - High-speed Ethernet switches:
      - mlxsw: implement basic line card information querying
      - prestera: add support for traffic policing on ingress and egress

   - Embedded Ethernet switches:
      - lan966x: add support for packet DMA (FDMA)
      - lan966x: add support for PTP programmable pins
      - ti: cpsw_new: enable bc/mc storm prevention

   - Qualcomm 802.11ax WiFi (ath11k):
      - Wake-on-WLAN support for QCA6390 and WCN6855
      - device recovery (firmware restart) support
      - support setting Specific Absorption Rate (SAR) for WCN6855
      - read country code from SMBIOS for WCN6855/QCA6390
      - enable keep-alive during WoWLAN suspend
      - implement remain-on-channel support

   - MediaTek WiFi (mt76):
      - support Wireless Ethernet Dispatch offloading packet movement
        between the Ethernet switch and WiFi interfaces
      - non-standard VHT MCS10-11 support
      - mt7921 AP mode support
      - mt7921 IPv6 NS offload support

   - Ethernet PHYs:
      - micrel: ksz9031/ksz9131: cabletest support
      - lan87xx: SQI support for T1 PHYs
      - lan937x: add interrupt support for link detection"

* tag 'net-next-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1809 commits)
  ptp: ocp: Add firmware header checks
  ptp: ocp: fix PPS source selector debugfs reporting
  ptp: ocp: add .init function for sma_op vector
  ptp: ocp: vectorize the sma accessor functions
  ptp: ocp: constify selectors
  ptp: ocp: parameterize input/output sma selectors
  ptp: ocp: revise firmware display
  ptp: ocp: add Celestica timecard PCI ids
  ptp: ocp: Remove #ifdefs around PCI IDs
  ptp: ocp: 32-bit fixups for pci start address
  Revert "net/smc: fix listen processing for SMC-Rv2"
  ath6kl: Use cc-disable-warning to disable -Wdangling-pointer
  selftests/bpf: Dynptr tests
  bpf: Add dynptr data slices
  bpf: Add bpf_dynptr_read and bpf_dynptr_write
  bpf: Dynptr support for ring buffers
  bpf: Add bpf_dynptr_from_mem for local dynptrs
  bpf: Add verifier support for dynptrs
  bpf: Suppress 'passing zero to PTR_ERR' warning
  bpf: Introduce bpf_arch_text_invalidate for bpf_prog_pack
  ...

1 files changed, 284 insertions, 0 deletions

diff --git a/drivers/net/wireless/silabs/wfx/bus_spi.c b/drivers/net/wireless/silabs/wfx/bus_spi.c
new file mode 100644
index 000000000000..7fb1afb8ed31
--- /dev/null
+++ b/drivers/net/wireless/silabs/wfx/bus_spi.c
@@ -0,0 +1,284 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SPI interface.
+ *
+ * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
+ * Copyright (c) 2011, Sagrad Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/spi/spi.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/of.h>
+
+#include "bus.h"
+#include "wfx.h"
+#include "hwio.h"
+#include "main.h"
+#include "bh.h"
+
+#define SET_WRITE 0x7FFF        /* usage: and operation */
+#define SET_READ 0x8000         /* usage: or operation */
+
+static const struct wfx_platform_data pdata_wf200 = {
+	.file_fw = "wfx/wfm_wf200",
+	.file_pds = "wfx/wf200.pds",
+	.use_rising_clk = true,
+};
+
+static const struct wfx_platform_data pdata_brd4001a = {
+	.file_fw = "wfx/wfm_wf200",
+	.file_pds = "wfx/brd4001a.pds",
+	.use_rising_clk = true,
+};
+
+static const struct wfx_platform_data pdata_brd8022a = {
+	.file_fw = "wfx/wfm_wf200",
+	.file_pds = "wfx/brd8022a.pds",
+	.use_rising_clk = true,
+};
+
+static const struct wfx_platform_data pdata_brd8023a = {
+	.file_fw = "wfx/wfm_wf200",
+	.file_pds = "wfx/brd8023a.pds",
+	.use_rising_clk = true,
+};
+
+struct wfx_spi_priv {
+	struct spi_device *func;
+	struct wfx_dev *core;
+	struct gpio_desc *gpio_reset;
+	bool need_swab;
+};
+
+/* The chip reads 16bits of data at time and place them directly into (little endian) CPU register.
+ * So, the chip expects bytes order to be "B1 B0 B3 B2" (while LE is "B0 B1 B2 B3" and BE is
+ * "B3 B2 B1 B0")
+ *
+ * A little endian host with bits_per_word == 16 should do the right job natively. The code below to
+ * support big endian host and commonly used SPI 8bits.
+ */
+static int wfx_spi_copy_from_io(void *priv, unsigned int addr, void *dst, size_t count)
+{
+	struct wfx_spi_priv *bus = priv;
+	u16 regaddr = (addr << 12) | (count / 2) | SET_READ;
+	struct spi_message m;
+	struct spi_transfer t_addr = {
+		.tx_buf = &regaddr,
+		.len = sizeof(regaddr),
+	};
+	struct spi_transfer t_msg = {
+		.rx_buf = dst,
+		.len = count,
+	};
+	u16 *dst16 = dst;
+	int ret, i;
+
+	WARN(count % 2, "buffer size must be a multiple of 2");
+
+	cpu_to_le16s(&regaddr);
+	if (bus->need_swab)
+		swab16s(&regaddr);
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t_addr, &m);
+	spi_message_add_tail(&t_msg, &m);
+	ret = spi_sync(bus->func, &m);
+
+	if (bus->need_swab && addr == WFX_REG_CONFIG)
+		for (i = 0; i < count / 2; i++)
+			swab16s(&dst16[i]);
+	return ret;
+}
+
+static int wfx_spi_copy_to_io(void *priv, unsigned int addr, const void *src, size_t count)
+{
+	struct wfx_spi_priv *bus = priv;
+	u16 regaddr = (addr << 12) | (count / 2);
+	/* FIXME: use a bounce buffer */
+	u16 *src16 = (void *)src;
+	int ret, i;
+	struct spi_message m;
+	struct spi_transfer t_addr = {
+		.tx_buf = &regaddr,
+		.len = sizeof(regaddr),
+	};
+	struct spi_transfer t_msg = {
+		.tx_buf = src,
+		.len = count,
+	};
+
+	WARN(count % 2, "buffer size must be a multiple of 2");
+	WARN(regaddr & SET_READ, "bad addr or size overflow");
+
+	cpu_to_le16s(&regaddr);
+
+	/* Register address and CONFIG content always use 16bit big endian
+	 * ("BADC" order)
+	 */
+	if (bus->need_swab)
+		swab16s(&regaddr);
+	if (bus->need_swab && addr == WFX_REG_CONFIG)
+		for (i = 0; i < count / 2; i++)
+			swab16s(&src16[i]);
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t_addr, &m);
+	spi_message_add_tail(&t_msg, &m);
+	ret = spi_sync(bus->func, &m);
+
+	if (bus->need_swab && addr == WFX_REG_CONFIG)
+		for (i = 0; i < count / 2; i++)
+			swab16s(&src16[i]);
+	return ret;
+}
+
+static void wfx_spi_lock(void *priv)
+{
+}
+
+static void wfx_spi_unlock(void *priv)
+{
+}
+
+static irqreturn_t wfx_spi_irq_handler(int irq, void *priv)
+{
+	struct wfx_spi_priv *bus = priv;
+
+	wfx_bh_request_rx(bus->core);
+	return IRQ_HANDLED;
+}
+
+static int wfx_spi_irq_subscribe(void *priv)
+{
+	struct wfx_spi_priv *bus = priv;
+	u32 flags;
+
+	flags = irq_get_trigger_type(bus->func->irq);
+	if (!flags)
+		flags = IRQF_TRIGGER_HIGH;
+	flags |= IRQF_ONESHOT;
+	return devm_request_threaded_irq(&bus->func->dev, bus->func->irq, NULL,
+					 wfx_spi_irq_handler, flags, "wfx", bus);
+}
+
+static int wfx_spi_irq_unsubscribe(void *priv)
+{
+	struct wfx_spi_priv *bus = priv;
+
+	devm_free_irq(&bus->func->dev, bus->func->irq, bus);
+	return 0;
+}
+
+static size_t wfx_spi_align_size(void *priv, size_t size)
+{
+	/* Most of SPI controllers avoid DMA if buffer size is not 32bit aligned */
+	return ALIGN(size, 4);
+}
+
+static const struct wfx_hwbus_ops wfx_spi_hwbus_ops = {
+	.copy_from_io    = wfx_spi_copy_from_io,
+	.copy_to_io      = wfx_spi_copy_to_io,
+	.irq_subscribe   = wfx_spi_irq_subscribe,
+	.irq_unsubscribe = wfx_spi_irq_unsubscribe,
+	.lock            = wfx_spi_lock,
+	.unlock          = wfx_spi_unlock,
+	.align_size      = wfx_spi_align_size,
+};
+
+static int wfx_spi_probe(struct spi_device *func)
+{
+	struct wfx_platform_data *pdata;
+	struct wfx_spi_priv *bus;
+	int ret;
+
+	if (!func->bits_per_word)
+		func->bits_per_word = 16;
+	ret = spi_setup(func);
+	if (ret)
+		return ret;
+	pdata = (struct wfx_platform_data *)spi_get_device_id(func)->driver_data;
+	if (!pdata) {
+		dev_err(&func->dev, "unable to retrieve driver data (please report)\n");
+		return -ENODEV;
+	}
+
+	/* Trace below is also displayed by spi_setup() if compiled with DEBUG */
+	dev_dbg(&func->dev, "SPI params: CS=%d, mode=%d bits/word=%d speed=%d\n",
+		func->chip_select, func->mode, func->bits_per_word, func->max_speed_hz);
+	if (func->bits_per_word != 16 && func->bits_per_word != 8)
+		dev_warn(&func->dev, "unusual bits/word value: %d\n", func->bits_per_word);
+	if (func->max_speed_hz > 50000000)
+		dev_warn(&func->dev, "%dHz is a very high speed\n", func->max_speed_hz);
+
+	bus = devm_kzalloc(&func->dev, sizeof(*bus), GFP_KERNEL);
+	if (!bus)
+		return -ENOMEM;
+	bus->func = func;
+	if (func->bits_per_word == 8 || IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+		bus->need_swab = true;
+	spi_set_drvdata(func, bus);
+
+	bus->gpio_reset = devm_gpiod_get_optional(&func->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(bus->gpio_reset))
+		return PTR_ERR(bus->gpio_reset);
+	if (!bus->gpio_reset) {
+		dev_warn(&func->dev, "gpio reset is not defined, trying to load firmware anyway\n");
+	} else {
+		gpiod_set_consumer_name(bus->gpio_reset, "wfx reset");
+		gpiod_set_value_cansleep(bus->gpio_reset, 1);
+		usleep_range(100, 150);
+		gpiod_set_value_cansleep(bus->gpio_reset, 0);
+		usleep_range(2000, 2500);
+	}
+
+	bus->core = wfx_init_common(&func->dev, pdata, &wfx_spi_hwbus_ops, bus);
+	if (!bus->core)
+		return -EIO;
+
+	return wfx_probe(bus->core);
+}
+
+static void wfx_spi_remove(struct spi_device *func)
+{
+	struct wfx_spi_priv *bus = spi_get_drvdata(func);
+
+	wfx_release(bus->core);
+}
+
+/* For dynamic driver binding, kernel does not use OF to match driver. It only
+ * use modalias and modalias is a copy of 'compatible' DT node with vendor
+ * stripped.
+ */
+static const struct spi_device_id wfx_spi_id[] = {
+	{ "wf200",    (kernel_ulong_t)&pdata_wf200 },
+	{ "brd4001a", (kernel_ulong_t)&pdata_brd4001a },
+	{ "brd8022a", (kernel_ulong_t)&pdata_brd8022a },
+	{ "brd8023a", (kernel_ulong_t)&pdata_brd8023a },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, wfx_spi_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id wfx_spi_of_match[] = {
+	{ .compatible = "silabs,wf200" },
+	{ .compatible = "silabs,brd4001a" },
+	{ .compatible = "silabs,brd8022a" },
+	{ .compatible = "silabs,brd8023a" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, wfx_spi_of_match);
+#endif
+
+struct spi_driver wfx_spi_driver = {
+	.driver = {
+		.name = "wfx-spi",
+		.of_match_table = of_match_ptr(wfx_spi_of_match),
+	},
+	.id_table = wfx_spi_id,
+	.probe = wfx_spi_probe,
+	.remove = wfx_spi_remove,
+};