Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 737 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/qib/qib_sysfs.c b/drivers/infiniband/hw/qib/qib_sysfs.c
new file mode 100644
index 000000000..41c272980
--- /dev/null
+++ b/drivers/infiniband/hw/qib/qib_sysfs.c
@@ -0,0 +1,737 @@
+/*
+ * Copyright (c) 2012 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
+ * Copyright (c) 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/ctype.h>
+#include <rdma/ib_sysfs.h>
+
+#include "qib.h"
+#include "qib_mad.h"
+
+static struct qib_pportdata *qib_get_pportdata_kobj(struct kobject *kobj)
+{
+	u32 port_num;
+	struct ib_device *ibdev = ib_port_sysfs_get_ibdev_kobj(kobj, &port_num);
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+
+	return &dd->pport[port_num - 1];
+}
+
+/*
+ * Get/Set heartbeat enable. OR of 1=enabled, 2=auto
+ */
+static ssize_t hrtbt_enable_show(struct ib_device *ibdev, u32 port_num,
+				 struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
+
+	return sysfs_emit(buf, "%d\n", dd->f_get_ib_cfg(ppd, QIB_IB_CFG_HRTBT));
+}
+
+static ssize_t hrtbt_enable_store(struct ib_device *ibdev, u32 port_num,
+				  struct ib_port_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
+	int ret;
+	u16 val;
+
+	ret = kstrtou16(buf, 0, &val);
+	if (ret) {
+		qib_dev_err(dd, "attempt to set invalid Heartbeat enable\n");
+		return ret;
+	}
+
+	/*
+	 * Set the "intentional" heartbeat enable per either of
+	 * "Enable" and "Auto", as these are normally set together.
+	 * This bit is consulted when leaving loopback mode,
+	 * because entering loopback mode overrides it and automatically
+	 * disables heartbeat.
+	 */
+	ret = dd->f_set_ib_cfg(ppd, QIB_IB_CFG_HRTBT, val);
+	return ret < 0 ? ret : count;
+}
+static IB_PORT_ATTR_RW(hrtbt_enable);
+
+static ssize_t loopback_store(struct ib_device *ibdev, u32 port_num,
+			      struct ib_port_attribute *attr, const char *buf,
+			      size_t count)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
+	int ret = count, r;
+
+	r = dd->f_set_ib_loopback(ppd, buf);
+	if (r < 0)
+		ret = r;
+
+	return ret;
+}
+static IB_PORT_ATTR_WO(loopback);
+
+static ssize_t led_override_store(struct ib_device *ibdev, u32 port_num,
+				  struct ib_port_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
+	int ret;
+	u16 val;
+
+	ret = kstrtou16(buf, 0, &val);
+	if (ret) {
+		qib_dev_err(dd, "attempt to set invalid LED override\n");
+		return ret;
+	}
+
+	qib_set_led_override(ppd, val);
+	return count;
+}
+static IB_PORT_ATTR_WO(led_override);
+
+static ssize_t status_show(struct ib_device *ibdev, u32 port_num,
+			   struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
+
+	if (!ppd->statusp)
+		return -EINVAL;
+
+	return sysfs_emit(buf, "0x%llx\n", (unsigned long long)*(ppd->statusp));
+}
+static IB_PORT_ATTR_RO(status);
+
+/*
+ * For userland compatibility, these offsets must remain fixed.
+ * They are strings for QIB_STATUS_*
+ */
+static const char * const qib_status_str[] = {
+	"Initted",
+	"",
+	"",
+	"",
+	"",
+	"Present",
+	"IB_link_up",
+	"IB_configured",
+	"",
+	"Fatal_Hardware_Error",
+	NULL,
+};
+
+static ssize_t status_str_show(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
+	int i, any;
+	u64 s;
+	ssize_t ret;
+
+	if (!ppd->statusp) {
+		ret = -EINVAL;
+		goto bail;
+	}
+
+	s = *(ppd->statusp);
+	*buf = '\0';
+	for (any = i = 0; s && qib_status_str[i]; i++) {
+		if (s & 1) {
+			/* if overflow */
+			if (any && strlcat(buf, " ", PAGE_SIZE) >= PAGE_SIZE)
+				break;
+			if (strlcat(buf, qib_status_str[i], PAGE_SIZE) >=
+					PAGE_SIZE)
+				break;
+			any = 1;
+		}
+		s >>= 1;
+	}
+	if (any)
+		strlcat(buf, "\n", PAGE_SIZE);
+
+	ret = strlen(buf);
+
+bail:
+	return ret;
+}
+static IB_PORT_ATTR_RO(status_str);
+
+/* end of per-port functions */
+
+static struct attribute *port_linkcontrol_attributes[] = {
+	&ib_port_attr_loopback.attr,
+	&ib_port_attr_led_override.attr,
+	&ib_port_attr_hrtbt_enable.attr,
+	&ib_port_attr_status.attr,
+	&ib_port_attr_status_str.attr,
+	NULL
+};
+
+static const struct attribute_group port_linkcontrol_group = {
+	.name = "linkcontrol",
+	.attrs = port_linkcontrol_attributes,
+};
+
+/*
+ * Start of per-port congestion control structures and support code
+ */
+
+/*
+ * Congestion control table size followed by table entries
+ */
+static ssize_t cc_table_bin_read(struct file *filp, struct kobject *kobj,
+				 struct bin_attribute *bin_attr, char *buf,
+				 loff_t pos, size_t count)
+{
+	struct qib_pportdata *ppd = qib_get_pportdata_kobj(kobj);
+	int ret;
+
+	if (!qib_cc_table_size || !ppd->ccti_entries_shadow)
+		return -EINVAL;
+
+	ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
+		 + sizeof(__be16);
+
+	if (pos > ret)
+		return -EINVAL;
+
+	if (count > ret - pos)
+		count = ret - pos;
+
+	if (!count)
+		return count;
+
+	spin_lock(&ppd->cc_shadow_lock);
+	memcpy(buf, ppd->ccti_entries_shadow, count);
+	spin_unlock(&ppd->cc_shadow_lock);
+
+	return count;
+}
+static BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
+
+/*
+ * Congestion settings: port control, control map and an array of 16
+ * entries for the congestion entries - increase, timer, event log
+ * trigger threshold and the minimum injection rate delay.
+ */
+static ssize_t cc_setting_bin_read(struct file *filp, struct kobject *kobj,
+				   struct bin_attribute *bin_attr, char *buf,
+				   loff_t pos, size_t count)
+{
+	struct qib_pportdata *ppd = qib_get_pportdata_kobj(kobj);
+	int ret;
+
+	if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
+		return -EINVAL;
+
+	ret = sizeof(struct ib_cc_congestion_setting_attr_shadow);
+
+	if (pos > ret)
+		return -EINVAL;
+	if (count > ret - pos)
+		count = ret - pos;
+
+	if (!count)
+		return count;
+
+	spin_lock(&ppd->cc_shadow_lock);
+	memcpy(buf, ppd->congestion_entries_shadow, count);
+	spin_unlock(&ppd->cc_shadow_lock);
+
+	return count;
+}
+static BIN_ATTR_RO(cc_setting_bin, PAGE_SIZE);
+
+static struct bin_attribute *port_ccmgta_attributes[] = {
+	&bin_attr_cc_setting_bin,
+	&bin_attr_cc_table_bin,
+	NULL,
+};
+
+static umode_t qib_ccmgta_is_bin_visible(struct kobject *kobj,
+				 struct bin_attribute *attr, int n)
+{
+	struct qib_pportdata *ppd = qib_get_pportdata_kobj(kobj);
+
+	if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
+		return 0;
+	return attr->attr.mode;
+}
+
+static const struct attribute_group port_ccmgta_attribute_group = {
+	.name = "CCMgtA",
+	.is_bin_visible = qib_ccmgta_is_bin_visible,
+	.bin_attrs = port_ccmgta_attributes,
+};
+
+/* Start sl2vl */
+
+struct qib_sl2vl_attr {
+	struct ib_port_attribute attr;
+	int sl;
+};
+
+static ssize_t sl2vl_attr_show(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_sl2vl_attr *sattr =
+		container_of(attr, struct qib_sl2vl_attr, attr);
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return sysfs_emit(buf, "%u\n", qibp->sl_to_vl[sattr->sl]);
+}
+
+#define QIB_SL2VL_ATTR(N)                                                      \
+	static struct qib_sl2vl_attr qib_sl2vl_attr_##N = {                    \
+		.attr = __ATTR(N, 0444, sl2vl_attr_show, NULL),                \
+		.sl = N,                                                       \
+	}
+
+QIB_SL2VL_ATTR(0);
+QIB_SL2VL_ATTR(1);
+QIB_SL2VL_ATTR(2);
+QIB_SL2VL_ATTR(3);
+QIB_SL2VL_ATTR(4);
+QIB_SL2VL_ATTR(5);
+QIB_SL2VL_ATTR(6);
+QIB_SL2VL_ATTR(7);
+QIB_SL2VL_ATTR(8);
+QIB_SL2VL_ATTR(9);
+QIB_SL2VL_ATTR(10);
+QIB_SL2VL_ATTR(11);
+QIB_SL2VL_ATTR(12);
+QIB_SL2VL_ATTR(13);
+QIB_SL2VL_ATTR(14);
+QIB_SL2VL_ATTR(15);
+
+static struct attribute *port_sl2vl_attributes[] = {
+	&qib_sl2vl_attr_0.attr.attr,
+	&qib_sl2vl_attr_1.attr.attr,
+	&qib_sl2vl_attr_2.attr.attr,
+	&qib_sl2vl_attr_3.attr.attr,
+	&qib_sl2vl_attr_4.attr.attr,
+	&qib_sl2vl_attr_5.attr.attr,
+	&qib_sl2vl_attr_6.attr.attr,
+	&qib_sl2vl_attr_7.attr.attr,
+	&qib_sl2vl_attr_8.attr.attr,
+	&qib_sl2vl_attr_9.attr.attr,
+	&qib_sl2vl_attr_10.attr.attr,
+	&qib_sl2vl_attr_11.attr.attr,
+	&qib_sl2vl_attr_12.attr.attr,
+	&qib_sl2vl_attr_13.attr.attr,
+	&qib_sl2vl_attr_14.attr.attr,
+	&qib_sl2vl_attr_15.attr.attr,
+	NULL
+};
+
+static const struct attribute_group port_sl2vl_group = {
+	.name = "sl2vl",
+	.attrs = port_sl2vl_attributes,
+};
+
+/* End sl2vl */
+
+/* Start diag_counters */
+
+struct qib_diagc_attr {
+	struct ib_port_attribute attr;
+	size_t counter;
+};
+
+static ssize_t diagc_attr_show(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_diagc_attr *dattr =
+		container_of(attr, struct qib_diagc_attr, attr);
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return sysfs_emit(buf, "%llu\n", *((u64 *)qibp + dattr->counter));
+}
+
+static ssize_t diagc_attr_store(struct ib_device *ibdev, u32 port_num,
+				struct ib_port_attribute *attr, const char *buf,
+				size_t count)
+{
+	struct qib_diagc_attr *dattr =
+		container_of(attr, struct qib_diagc_attr, attr);
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+	u64 val;
+	int ret;
+
+	ret = kstrtou64(buf, 0, &val);
+	if (ret)
+		return ret;
+	*((u64 *)qibp + dattr->counter) = val;
+	return count;
+}
+
+#define QIB_DIAGC_ATTR(N)                                                      \
+	static_assert(__same_type(((struct qib_ibport *)0)->rvp.n_##N, u64));  \
+	static struct qib_diagc_attr qib_diagc_attr_##N = {                    \
+		.attr = __ATTR(N, 0664, diagc_attr_show, diagc_attr_store),    \
+		.counter =                                                     \
+			offsetof(struct qib_ibport, rvp.n_##N) / sizeof(u64)   \
+	}
+
+QIB_DIAGC_ATTR(rc_resends);
+QIB_DIAGC_ATTR(seq_naks);
+QIB_DIAGC_ATTR(rdma_seq);
+QIB_DIAGC_ATTR(rnr_naks);
+QIB_DIAGC_ATTR(other_naks);
+QIB_DIAGC_ATTR(rc_timeouts);
+QIB_DIAGC_ATTR(loop_pkts);
+QIB_DIAGC_ATTR(pkt_drops);
+QIB_DIAGC_ATTR(dmawait);
+QIB_DIAGC_ATTR(unaligned);
+QIB_DIAGC_ATTR(rc_dupreq);
+QIB_DIAGC_ATTR(rc_seqnak);
+QIB_DIAGC_ATTR(rc_crwaits);
+
+static u64 get_all_cpu_total(u64 __percpu *cntr)
+{
+	int cpu;
+	u64 counter = 0;
+
+	for_each_possible_cpu(cpu)
+		counter += *per_cpu_ptr(cntr, cpu);
+	return counter;
+}
+
+static ssize_t qib_store_per_cpu(struct qib_devdata *dd, const char *buf,
+				 size_t count, u64 *zero, u64 cur)
+{
+	u32 val;
+	int ret;
+
+	ret = kstrtou32(buf, 0, &val);
+	if (ret)
+		return ret;
+	if (val != 0) {
+		qib_dev_err(dd, "Per CPU cntrs can only be zeroed");
+		return count;
+	}
+	*zero = cur;
+	return count;
+}
+
+static ssize_t rc_acks_show(struct ib_device *ibdev, u32 port_num,
+			    struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return sysfs_emit(buf, "%llu\n",
+			  get_all_cpu_total(qibp->rvp.rc_acks) -
+				  qibp->rvp.z_rc_acks);
+}
+
+static ssize_t rc_acks_store(struct ib_device *ibdev, u32 port_num,
+			     struct ib_port_attribute *attr, const char *buf,
+			     size_t count)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return qib_store_per_cpu(dd, buf, count, &qibp->rvp.z_rc_acks,
+				 get_all_cpu_total(qibp->rvp.rc_acks));
+}
+static IB_PORT_ATTR_RW(rc_acks);
+
+static ssize_t rc_qacks_show(struct ib_device *ibdev, u32 port_num,
+			     struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return sysfs_emit(buf, "%llu\n",
+			  get_all_cpu_total(qibp->rvp.rc_qacks) -
+				  qibp->rvp.z_rc_qacks);
+}
+
+static ssize_t rc_qacks_store(struct ib_device *ibdev, u32 port_num,
+			      struct ib_port_attribute *attr, const char *buf,
+			      size_t count)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return qib_store_per_cpu(dd, buf, count, &qibp->rvp.z_rc_qacks,
+				 get_all_cpu_total(qibp->rvp.rc_qacks));
+}
+static IB_PORT_ATTR_RW(rc_qacks);
+
+static ssize_t rc_delayed_comp_show(struct ib_device *ibdev, u32 port_num,
+				    struct ib_port_attribute *attr, char *buf)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return sysfs_emit(buf, "%llu\n",
+			 get_all_cpu_total(qibp->rvp.rc_delayed_comp) -
+				 qibp->rvp.z_rc_delayed_comp);
+}
+
+static ssize_t rc_delayed_comp_store(struct ib_device *ibdev, u32 port_num,
+				     struct ib_port_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct qib_devdata *dd = dd_from_ibdev(ibdev);
+	struct qib_ibport *qibp = &dd->pport[port_num - 1].ibport_data;
+
+	return qib_store_per_cpu(dd, buf, count, &qibp->rvp.z_rc_delayed_comp,
+				 get_all_cpu_total(qibp->rvp.rc_delayed_comp));
+}
+static IB_PORT_ATTR_RW(rc_delayed_comp);
+
+static struct attribute *port_diagc_attributes[] = {
+	&qib_diagc_attr_rc_resends.attr.attr,
+	&qib_diagc_attr_seq_naks.attr.attr,
+	&qib_diagc_attr_rdma_seq.attr.attr,
+	&qib_diagc_attr_rnr_naks.attr.attr,
+	&qib_diagc_attr_other_naks.attr.attr,
+	&qib_diagc_attr_rc_timeouts.attr.attr,
+	&qib_diagc_attr_loop_pkts.attr.attr,
+	&qib_diagc_attr_pkt_drops.attr.attr,
+	&qib_diagc_attr_dmawait.attr.attr,
+	&qib_diagc_attr_unaligned.attr.attr,
+	&qib_diagc_attr_rc_dupreq.attr.attr,
+	&qib_diagc_attr_rc_seqnak.attr.attr,
+	&qib_diagc_attr_rc_crwaits.attr.attr,
+	&ib_port_attr_rc_acks.attr,
+	&ib_port_attr_rc_qacks.attr,
+	&ib_port_attr_rc_delayed_comp.attr,
+	NULL
+};
+
+static const struct attribute_group port_diagc_group = {
+	.name = "diag_counters",
+	.attrs = port_diagc_attributes,
+};
+
+/* End diag_counters */
+
+const struct attribute_group *qib_attr_port_groups[] = {
+	&port_linkcontrol_group,
+	&port_ccmgta_attribute_group,
+	&port_sl2vl_group,
+	&port_diagc_group,
+	NULL,
+};
+
+/* end of per-port file structures and support code */
+
+/*
+ * Start of per-unit (or driver, in some cases, but replicated
+ * per unit) functions (these get a device *)
+ */
+static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
+			   char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+
+	return sysfs_emit(buf, "%x\n", dd_from_dev(dev)->minrev);
+}
+static DEVICE_ATTR_RO(hw_rev);
+
+static ssize_t hca_type_show(struct device *device,
+			     struct device_attribute *attr, char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+
+	if (!dd->boardname)
+		return -EINVAL;
+	return sysfs_emit(buf, "%s\n", dd->boardname);
+}
+static DEVICE_ATTR_RO(hca_type);
+static DEVICE_ATTR(board_id, 0444, hca_type_show, NULL);
+
+static ssize_t version_show(struct device *device,
+			    struct device_attribute *attr, char *buf)
+{
+	/* The string printed here is already newline-terminated. */
+	return sysfs_emit(buf, "%s", (char *)ib_qib_version);
+}
+static DEVICE_ATTR_RO(version);
+
+static ssize_t boardversion_show(struct device *device,
+				 struct device_attribute *attr, char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+
+	/* The string printed here is already newline-terminated. */
+	return sysfs_emit(buf, "%s", dd->boardversion);
+}
+static DEVICE_ATTR_RO(boardversion);
+
+static ssize_t localbus_info_show(struct device *device,
+				  struct device_attribute *attr, char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+
+	/* The string printed here is already newline-terminated. */
+	return sysfs_emit(buf, "%s", dd->lbus_info);
+}
+static DEVICE_ATTR_RO(localbus_info);
+
+static ssize_t nctxts_show(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+
+	/* Return the number of user ports (contexts) available. */
+	/* The calculation below deals with a special case where
+	 * cfgctxts is set to 1 on a single-port board. */
+	return sysfs_emit(buf, "%u\n",
+			  (dd->first_user_ctxt > dd->cfgctxts) ?
+				  0 :
+				  (dd->cfgctxts - dd->first_user_ctxt));
+}
+static DEVICE_ATTR_RO(nctxts);
+
+static ssize_t nfreectxts_show(struct device *device,
+			       struct device_attribute *attr, char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+
+	/* Return the number of free user ports (contexts) available. */
+	return sysfs_emit(buf, "%u\n", dd->freectxts);
+}
+static DEVICE_ATTR_RO(nfreectxts);
+
+static ssize_t serial_show(struct device *device, struct device_attribute *attr,
+			   char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+	const u8 *end = memchr(dd->serial, 0, ARRAY_SIZE(dd->serial));
+	int size = end ? end - dd->serial : ARRAY_SIZE(dd->serial);
+
+	return sysfs_emit(buf, ".%*s\n", size, dd->serial);
+}
+static DEVICE_ATTR_RO(serial);
+
+static ssize_t chip_reset_store(struct device *device,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+	int ret;
+
+	if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
+		ret = -EINVAL;
+		goto bail;
+	}
+
+	ret = qib_reset_device(dd->unit);
+bail:
+	return ret < 0 ? ret : count;
+}
+static DEVICE_ATTR_WO(chip_reset);
+
+/*
+ * Dump tempsense regs. in decimal, to ease shell-scripts.
+ */
+static ssize_t tempsense_show(struct device *device,
+			      struct device_attribute *attr, char *buf)
+{
+	struct qib_ibdev *dev =
+		rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
+	struct qib_devdata *dd = dd_from_dev(dev);
+	int i;
+	u8 regvals[8];
+
+	for (i = 0; i < 8; i++) {
+		int ret;
+
+		if (i == 6)
+			continue;
+		ret = dd->f_tempsense_rd(dd, i);
+		if (ret < 0)
+			return ret;	/* return error on bad read */
+		regvals[i] = ret;
+	}
+	return sysfs_emit(buf, "%d %d %02X %02X %d %d\n",
+			  (signed char)regvals[0],
+			  (signed char)regvals[1],
+			  regvals[2],
+			  regvals[3],
+			  (signed char)regvals[5],
+			  (signed char)regvals[7]);
+}
+static DEVICE_ATTR_RO(tempsense);
+
+/*
+ * end of per-unit (or driver, in some cases, but replicated
+ * per unit) functions
+ */
+
+/* start of per-unit file structures and support code */
+static struct attribute *qib_attributes[] = {
+	&dev_attr_hw_rev.attr,
+	&dev_attr_hca_type.attr,
+	&dev_attr_board_id.attr,
+	&dev_attr_version.attr,
+	&dev_attr_nctxts.attr,
+	&dev_attr_nfreectxts.attr,
+	&dev_attr_serial.attr,
+	&dev_attr_boardversion.attr,
+	&dev_attr_tempsense.attr,
+	&dev_attr_localbus_info.attr,
+	&dev_attr_chip_reset.attr,
+	NULL,
+};
+
+const struct attribute_group qib_attr_group = {
+	.attrs = qib_attributes,
+};