Merge tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core:

   - support "prefer busy polling" NAPI operation mode, where we defer
     softirq for some time expecting applications to periodically busy
     poll

   - AF_XDP: improve efficiency by more batching and hindering the
     adjacency cache prefetcher

   - af_packet: make packet_fanout.arr size configurable up to 64K

   - tcp: optimize TCP zero copy receive in presence of partial or
     unaligned reads making zero copy a performance win for much smaller
     messages

   - XDP: add bulk APIs for returning / freeing frames

   - sched: support fragmenting IP packets as they come out of conntrack

   - net: allow virtual netdevs to forward UDP L4 and fraglist GSO skbs

  BPF:

   - BPF switch from crude rlimit-based to memcg-based memory accounting

   - BPF type format information for kernel modules and related tracing
     enhancements

   - BPF implement task local storage for BPF LSM

   - allow the FENTRY/FEXIT/RAW_TP tracing programs to use
     bpf_sk_storage

  Protocols:

   - mptcp: improve multiple xmit streams support, memory accounting and
     many smaller improvements

   - TLS: support CHACHA20-POLY1305 cipher

   - seg6: add support for SRv6 End.DT4/DT6 behavior

   - sctp: Implement RFC 6951: UDP Encapsulation of SCTP

   - ppp_generic: add ability to bridge channels directly

   - bridge: Connectivity Fault Management (CFM) support as is defined
     in IEEE 802.1Q section 12.14.

  Drivers:

   - mlx5: make use of the new auxiliary bus to organize the driver
     internals

   - mlx5: more accurate port TX timestamping support

   - mlxsw:
      - improve the efficiency of offloaded next hop updates by using
        the new nexthop object API
      - support blackhole nexthops
      - support IEEE 802.1ad (Q-in-Q) bridging

   - rtw88: major bluetooth co-existance improvements

   - iwlwifi: support new 6 GHz frequency band

   - ath11k: Fast Initial Link Setup (FILS)

   - mt7915: dual band concurrent (DBDC) support

   - net: ipa: add basic support for IPA v4.5

  Refactor:

   - a few pieces of in_interrupt() cleanup work from Sebastian Andrzej
     Siewior

   - phy: add support for shared interrupts; get rid of multiple driver
     APIs and have the drivers write a full IRQ handler, slight growth
     of driver code should be compensated by the simpler API which also
     allows shared IRQs

   - add common code for handling netdev per-cpu counters

   - move TX packet re-allocation from Ethernet switch tag drivers to a
     central place

   - improve efficiency and rename nla_strlcpy

   - number of W=1 warning cleanups as we now catch those in a patchwork
     build bot

  Old code removal:

   - wan: delete the DLCI / SDLA drivers

   - wimax: move to staging

   - wifi: remove old WDS wifi bridging support"

* tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1922 commits)
  net: hns3: fix expression that is currently always true
  net: fix proc_fs init handling in af_packet and tls
  nfc: pn533: convert comma to semicolon
  af_vsock: Assign the vsock transport considering the vsock address flags
  af_vsock: Set VMADDR_FLAG_TO_HOST flag on the receive path
  vsock_addr: Check for supported flag values
  vm_sockets: Add VMADDR_FLAG_TO_HOST vsock flag
  vm_sockets: Add flags field in the vsock address data structure
  net: Disable NETIF_F_HW_TLS_TX when HW_CSUM is disabled
  tcp: Add logic to check for SYN w/ data in tcp_simple_retransmit
  net: mscc: ocelot: install MAC addresses in .ndo_set_rx_mode from process context
  nfc: s3fwrn5: Release the nfc firmware
  net: vxget: clean up sparse warnings
  mlxsw: spectrum_router: Use eXtended mezzanine to offload IPv4 router
  mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3
  mlxsw: spectrum_router_xm: Introduce basic XM cache flushing
  mlxsw: reg: Add Router LPM Cache Enable Register
  mlxsw: reg: Add Router LPM Cache ML Delete Register
  mlxsw: spectrum_router_xm: Implement L-value tracking for M-index
  mlxsw: reg: Add XM Router M Table Register
  ...

1 files changed, 253 insertions, 0 deletions

diff --git a/drivers/staging/wimax/i2400m/debugfs.c b/drivers/staging/wimax/i2400m/debugfs.c
new file mode 100644
index 000000000000..1c640b41ea4c
--- /dev/null
+++ b/drivers/staging/wimax/i2400m/debugfs.c
@@ -0,0 +1,253 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Debugfs interfaces to manipulate driver and device information
+ *
+ * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ */
+
+#include <linux/debugfs.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/export.h>
+#include "i2400m.h"
+
+
+#define D_SUBMODULE debugfs
+#include "debug-levels.h"
+
+static
+int debugfs_netdev_queue_stopped_get(void *data, u64 *val)
+{
+	struct i2400m *i2400m = data;
+	*val = netif_queue_stopped(i2400m->wimax_dev.net_dev);
+	return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(fops_netdev_queue_stopped,
+			debugfs_netdev_queue_stopped_get,
+			NULL, "%llu\n");
+
+/*
+ * We don't allow partial reads of this file, as then the reader would
+ * get weirdly confused data as it is updated.
+ *
+ * So or you read it all or nothing; if you try to read with an offset
+ * != 0, we consider you are done reading.
+ */
+static
+ssize_t i2400m_rx_stats_read(struct file *filp, char __user *buffer,
+			     size_t count, loff_t *ppos)
+{
+	struct i2400m *i2400m = filp->private_data;
+	char buf[128];
+	unsigned long flags;
+
+	if (*ppos != 0)
+		return 0;
+	if (count < sizeof(buf))
+		return -ENOSPC;
+	spin_lock_irqsave(&i2400m->rx_lock, flags);
+	snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
+		 i2400m->rx_pl_num, i2400m->rx_pl_min,
+		 i2400m->rx_pl_max, i2400m->rx_num,
+		 i2400m->rx_size_acc,
+		 i2400m->rx_size_min, i2400m->rx_size_max);
+	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+	return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
+}
+
+
+/* Any write clears the stats */
+static
+ssize_t i2400m_rx_stats_write(struct file *filp, const char __user *buffer,
+			      size_t count, loff_t *ppos)
+{
+	struct i2400m *i2400m = filp->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&i2400m->rx_lock, flags);
+	i2400m->rx_pl_num = 0;
+	i2400m->rx_pl_max = 0;
+	i2400m->rx_pl_min = UINT_MAX;
+	i2400m->rx_num = 0;
+	i2400m->rx_size_acc = 0;
+	i2400m->rx_size_min = UINT_MAX;
+	i2400m->rx_size_max = 0;
+	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+	return count;
+}
+
+static
+const struct file_operations i2400m_rx_stats_fops = {
+	.owner =	THIS_MODULE,
+	.open =		simple_open,
+	.read =		i2400m_rx_stats_read,
+	.write =	i2400m_rx_stats_write,
+	.llseek =	default_llseek,
+};
+
+
+/* See i2400m_rx_stats_read() */
+static
+ssize_t i2400m_tx_stats_read(struct file *filp, char __user *buffer,
+			     size_t count, loff_t *ppos)
+{
+	struct i2400m *i2400m = filp->private_data;
+	char buf[128];
+	unsigned long flags;
+
+	if (*ppos != 0)
+		return 0;
+	if (count < sizeof(buf))
+		return -ENOSPC;
+	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
+		 i2400m->tx_pl_num, i2400m->tx_pl_min,
+		 i2400m->tx_pl_max, i2400m->tx_num,
+		 i2400m->tx_size_acc,
+		 i2400m->tx_size_min, i2400m->tx_size_max);
+	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+	return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
+}
+
+/* Any write clears the stats */
+static
+ssize_t i2400m_tx_stats_write(struct file *filp, const char __user *buffer,
+			      size_t count, loff_t *ppos)
+{
+	struct i2400m *i2400m = filp->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	i2400m->tx_pl_num = 0;
+	i2400m->tx_pl_max = 0;
+	i2400m->tx_pl_min = UINT_MAX;
+	i2400m->tx_num = 0;
+	i2400m->tx_size_acc = 0;
+	i2400m->tx_size_min = UINT_MAX;
+	i2400m->tx_size_max = 0;
+	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+	return count;
+}
+
+static
+const struct file_operations i2400m_tx_stats_fops = {
+	.owner =	THIS_MODULE,
+	.open =		simple_open,
+	.read =		i2400m_tx_stats_read,
+	.write =	i2400m_tx_stats_write,
+	.llseek =	default_llseek,
+};
+
+
+/* Write 1 to ask the device to go into suspend */
+static
+int debugfs_i2400m_suspend_set(void *data, u64 val)
+{
+	int result;
+	struct i2400m *i2400m = data;
+	result = i2400m_cmd_enter_powersave(i2400m);
+	if (result >= 0)
+		result = 0;
+	return result;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(fops_i2400m_suspend,
+			NULL, debugfs_i2400m_suspend_set,
+			"%llu\n");
+
+/*
+ * Reset the device
+ *
+ * Write 0 to ask the device to soft reset, 1 to cold reset, 2 to bus
+ * reset (as defined by enum i2400m_reset_type).
+ */
+static
+int debugfs_i2400m_reset_set(void *data, u64 val)
+{
+	int result;
+	struct i2400m *i2400m = data;
+	enum i2400m_reset_type rt = val;
+	switch(rt) {
+	case I2400M_RT_WARM:
+	case I2400M_RT_COLD:
+	case I2400M_RT_BUS:
+		result = i2400m_reset(i2400m, rt);
+		if (result >= 0)
+			result = 0;
+		break;
+	default:
+		result = -EINVAL;
+	}
+	return result;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(fops_i2400m_reset,
+			NULL, debugfs_i2400m_reset_set,
+			"%llu\n");
+
+void i2400m_debugfs_add(struct i2400m *i2400m)
+{
+	struct dentry *dentry = i2400m->wimax_dev.debugfs_dentry;
+
+	dentry = debugfs_create_dir("i2400m", dentry);
+	i2400m->debugfs_dentry = dentry;
+
+	d_level_register_debugfs("dl_", control, dentry);
+	d_level_register_debugfs("dl_", driver, dentry);
+	d_level_register_debugfs("dl_", debugfs, dentry);
+	d_level_register_debugfs("dl_", fw, dentry);
+	d_level_register_debugfs("dl_", netdev, dentry);
+	d_level_register_debugfs("dl_", rfkill, dentry);
+	d_level_register_debugfs("dl_", rx, dentry);
+	d_level_register_debugfs("dl_", tx, dentry);
+
+	debugfs_create_size_t("tx_in", 0400, dentry, &i2400m->tx_in);
+	debugfs_create_size_t("tx_out", 0400, dentry, &i2400m->tx_out);
+	debugfs_create_u32("state", 0600, dentry, &i2400m->state);
+
+	/*
+	 * Trace received messages from user space
+	 *
+	 * In order to tap the bidirectional message stream in the
+	 * 'msg' pipe, user space can read from the 'msg' pipe;
+	 * however, due to limitations in libnl, we can't know what
+	 * the different applications are sending down to the kernel.
+	 *
+	 * So we have this hack where the driver will echo any message
+	 * received on the msg pipe from user space [through a call to
+	 * wimax_dev->op_msg_from_user() into
+	 * i2400m_op_msg_from_user()] into the 'trace' pipe that this
+	 * driver creates.
+	 *
+	 * So then, reading from both the 'trace' and 'msg' pipes in
+	 * user space will provide a full dump of the traffic.
+	 *
+	 * Write 1 to activate, 0 to clear.
+	 *
+	 * It is not really very atomic, but it is also not too
+	 * critical.
+	 */
+	debugfs_create_u8("trace_msg_from_user", 0600, dentry,
+			  &i2400m->trace_msg_from_user);
+
+	debugfs_create_file("netdev_queue_stopped", 0400, dentry, i2400m,
+			    &fops_netdev_queue_stopped);
+
+	debugfs_create_file("rx_stats", 0600, dentry, i2400m,
+			    &i2400m_rx_stats_fops);
+
+	debugfs_create_file("tx_stats", 0600, dentry, i2400m,
+			    &i2400m_tx_stats_fops);
+
+	debugfs_create_file("suspend", 0200, dentry, i2400m,
+			    &fops_i2400m_suspend);
+
+	debugfs_create_file("reset", 0200, dentry, i2400m, &fops_i2400m_reset);
+}
+
+void i2400m_debugfs_rm(struct i2400m *i2400m)
+{
+	debugfs_remove_recursive(i2400m->debugfs_dentry);
+}