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, 713 insertions, 0 deletions

diff --git a/sound/pci/asihpi/hpicmn.c b/sound/pci/asihpi/hpicmn.c
new file mode 100644
index 000000000..7d1abaedb
--- /dev/null
+++ b/sound/pci/asihpi/hpicmn.c
@@ -0,0 +1,713 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/******************************************************************************
+
+    AudioScience HPI driver
+    Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>
+
+
+\file hpicmn.c
+
+ Common functions used by hpixxxx.c modules
+
+(C) Copyright AudioScience Inc. 1998-2003
+*******************************************************************************/
+#define SOURCEFILE_NAME "hpicmn.c"
+
+#include "hpi_internal.h"
+#include "hpidebug.h"
+#include "hpimsginit.h"
+
+#include "hpicmn.h"
+
+struct hpi_adapters_list {
+	struct hpios_spinlock list_lock;
+	struct hpi_adapter_obj adapter[HPI_MAX_ADAPTERS];
+	u16 gw_num_adapters;
+};
+
+static struct hpi_adapters_list adapters;
+
+/**
+ * hpi_validate_response - Given an HPI Message that was sent out and
+ * a response that was received, validate that the response has the
+ * correct fields filled in, i.e ObjectType, Function etc
+ * @phm: message
+ * @phr: response
+ */
+u16 hpi_validate_response(struct hpi_message *phm, struct hpi_response *phr)
+{
+	if (phr->type != HPI_TYPE_RESPONSE) {
+		HPI_DEBUG_LOG(ERROR, "header type %d invalid\n", phr->type);
+		return HPI_ERROR_INVALID_RESPONSE;
+	}
+
+	if (phr->object != phm->object) {
+		HPI_DEBUG_LOG(ERROR, "header object %d invalid\n",
+			phr->object);
+		return HPI_ERROR_INVALID_RESPONSE;
+	}
+
+	if (phr->function != phm->function) {
+		HPI_DEBUG_LOG(ERROR, "header function %d invalid\n",
+			phr->function);
+		return HPI_ERROR_INVALID_RESPONSE;
+	}
+
+	return 0;
+}
+
+u16 hpi_add_adapter(struct hpi_adapter_obj *pao)
+{
+	u16 retval = 0;
+	/*HPI_ASSERT(pao->type); */
+
+	hpios_alistlock_lock(&adapters);
+
+	if (pao->index >= HPI_MAX_ADAPTERS) {
+		retval = HPI_ERROR_BAD_ADAPTER_NUMBER;
+		goto unlock;
+	}
+
+	if (adapters.adapter[pao->index].type) {
+		int a;
+		for (a = HPI_MAX_ADAPTERS - 1; a >= 0; a--) {
+			if (!adapters.adapter[a].type) {
+				HPI_DEBUG_LOG(WARNING,
+					"ASI%X duplicate index %d moved to %d\n",
+					pao->type, pao->index, a);
+				pao->index = a;
+				break;
+			}
+		}
+		if (a < 0) {
+			retval = HPI_ERROR_DUPLICATE_ADAPTER_NUMBER;
+			goto unlock;
+		}
+	}
+	adapters.adapter[pao->index] = *pao;
+	hpios_dsplock_init(&adapters.adapter[pao->index]);
+	adapters.gw_num_adapters++;
+
+unlock:
+	hpios_alistlock_unlock(&adapters);
+	return retval;
+}
+
+void hpi_delete_adapter(struct hpi_adapter_obj *pao)
+{
+	if (!pao->type) {
+		HPI_DEBUG_LOG(ERROR, "removing null adapter?\n");
+		return;
+	}
+
+	hpios_alistlock_lock(&adapters);
+	if (adapters.adapter[pao->index].type)
+		adapters.gw_num_adapters--;
+	memset(&adapters.adapter[pao->index], 0, sizeof(adapters.adapter[0]));
+	hpios_alistlock_unlock(&adapters);
+}
+
+/**
+ * hpi_find_adapter - FindAdapter returns a pointer to the struct
+ * hpi_adapter_obj with index wAdapterIndex in an HPI_ADAPTERS_LIST
+ * structure.
+ * @adapter_index: value in [0, HPI_MAX_ADAPTERS[
+ */
+struct hpi_adapter_obj *hpi_find_adapter(u16 adapter_index)
+{
+	struct hpi_adapter_obj *pao = NULL;
+
+	if (adapter_index >= HPI_MAX_ADAPTERS) {
+		HPI_DEBUG_LOG(VERBOSE, "find_adapter invalid index %d\n",
+			adapter_index);
+		return NULL;
+	}
+
+	pao = &adapters.adapter[adapter_index];
+	if (pao->type != 0) {
+		/*
+		   HPI_DEBUG_LOG(VERBOSE, "Found adapter index %d\n",
+		   wAdapterIndex);
+		 */
+		return pao;
+	} else {
+		/*
+		   HPI_DEBUG_LOG(VERBOSE, "No adapter index %d\n",
+		   wAdapterIndex);
+		 */
+		return NULL;
+	}
+}
+
+/**
+ * wipe_adapter_list - wipe an HPI_ADAPTERS_LIST structure.
+ *
+ */
+static void wipe_adapter_list(void)
+{
+	memset(&adapters, 0, sizeof(adapters));
+}
+
+static void subsys_get_adapter(struct hpi_message *phm,
+	struct hpi_response *phr)
+{
+	int count = phm->obj_index;
+	u16 index = 0;
+
+	/* find the nCount'th nonzero adapter in array */
+	for (index = 0; index < HPI_MAX_ADAPTERS; index++) {
+		if (adapters.adapter[index].type) {
+			if (!count)
+				break;
+			count--;
+		}
+	}
+
+	if (index < HPI_MAX_ADAPTERS) {
+		phr->u.s.adapter_index = adapters.adapter[index].index;
+		phr->u.s.adapter_type = adapters.adapter[index].type;
+	} else {
+		phr->u.s.adapter_index = 0;
+		phr->u.s.adapter_type = 0;
+		phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
+	}
+}
+
+static unsigned int control_cache_alloc_check(struct hpi_control_cache *pC)
+{
+	unsigned int i;
+	int cached = 0;
+	if (!pC)
+		return 0;
+
+	if (pC->init)
+		return pC->init;
+
+	if (!pC->p_cache)
+		return 0;
+
+	if (pC->control_count && pC->cache_size_in_bytes) {
+		char *p_master_cache;
+		unsigned int byte_count = 0;
+
+		p_master_cache = (char *)pC->p_cache;
+		HPI_DEBUG_LOG(DEBUG, "check %d controls\n",
+			pC->control_count);
+		for (i = 0; i < pC->control_count; i++) {
+			struct hpi_control_cache_info *info =
+				(struct hpi_control_cache_info *)
+				&p_master_cache[byte_count];
+			u16 control_index = info->control_index;
+
+			if (control_index >= pC->control_count) {
+				HPI_DEBUG_LOG(INFO,
+					"adap %d control index %d out of range, cache not ready?\n",
+					pC->adap_idx, control_index);
+				return 0;
+			}
+
+			if (!info->size_in32bit_words) {
+				if (!i) {
+					HPI_DEBUG_LOG(INFO,
+						"adap %d cache not ready?\n",
+						pC->adap_idx);
+					return 0;
+				}
+				/* The cache is invalid.
+				 * Minimum valid entry size is
+				 * sizeof(struct hpi_control_cache_info)
+				 */
+				HPI_DEBUG_LOG(ERROR,
+					"adap %d zero size cache entry %d\n",
+					pC->adap_idx, i);
+				break;
+			}
+
+			if (info->control_type) {
+				pC->p_info[control_index] = info;
+				cached++;
+			} else {	/* dummy cache entry */
+				pC->p_info[control_index] = NULL;
+			}
+
+			byte_count += info->size_in32bit_words * 4;
+
+			HPI_DEBUG_LOG(VERBOSE,
+				"cached %d, pinfo %p index %d type %d size %d\n",
+				cached, pC->p_info[info->control_index],
+				info->control_index, info->control_type,
+				info->size_in32bit_words);
+
+			/* quit loop early if whole cache has been scanned.
+			 * dwControlCount is the maximum possible entries
+			 * but some may be absent from the cache
+			 */
+			if (byte_count >= pC->cache_size_in_bytes)
+				break;
+			/* have seen last control index */
+			if (info->control_index == pC->control_count - 1)
+				break;
+		}
+
+		if (byte_count != pC->cache_size_in_bytes)
+			HPI_DEBUG_LOG(WARNING,
+				"adap %d bytecount %d != cache size %d\n",
+				pC->adap_idx, byte_count,
+				pC->cache_size_in_bytes);
+		else
+			HPI_DEBUG_LOG(DEBUG,
+				"adap %d cache good, bytecount == cache size = %d\n",
+				pC->adap_idx, byte_count);
+
+		pC->init = (u16)cached;
+	}
+	return pC->init;
+}
+
+/** Find a control.
+*/
+static short find_control(u16 control_index,
+	struct hpi_control_cache *p_cache, struct hpi_control_cache_info **pI)
+{
+	if (!control_cache_alloc_check(p_cache)) {
+		HPI_DEBUG_LOG(VERBOSE,
+			"control_cache_alloc_check() failed %d\n",
+			control_index);
+		return 0;
+	}
+
+	*pI = p_cache->p_info[control_index];
+	if (!*pI) {
+		HPI_DEBUG_LOG(VERBOSE, "Uncached Control %d\n",
+			control_index);
+		return 0;
+	} else {
+		HPI_DEBUG_LOG(VERBOSE, "find_control() type %d\n",
+			(*pI)->control_type);
+	}
+	return 1;
+}
+
+/* allow unified treatment of several string fields within struct */
+#define HPICMN_PAD_OFS_AND_SIZE(m)  {\
+	offsetof(struct hpi_control_cache_pad, m), \
+	sizeof(((struct hpi_control_cache_pad *)(NULL))->m) }
+
+struct pad_ofs_size {
+	unsigned int offset;
+	unsigned int field_size;
+};
+
+static const struct pad_ofs_size pad_desc[] = {
+	HPICMN_PAD_OFS_AND_SIZE(c_channel),	/* HPI_PAD_CHANNEL_NAME */
+	HPICMN_PAD_OFS_AND_SIZE(c_artist),	/* HPI_PAD_ARTIST */
+	HPICMN_PAD_OFS_AND_SIZE(c_title),	/* HPI_PAD_TITLE */
+	HPICMN_PAD_OFS_AND_SIZE(c_comment),	/* HPI_PAD_COMMENT */
+};
+
+/** CheckControlCache checks the cache and fills the struct hpi_response
+ * accordingly. It returns one if a cache hit occurred, zero otherwise.
+ */
+short hpi_check_control_cache_single(struct hpi_control_cache_single *pC,
+	struct hpi_message *phm, struct hpi_response *phr)
+{
+	size_t response_size;
+	short found = 1;
+
+	/* set the default response size */
+	response_size =
+		sizeof(struct hpi_response_header) +
+		sizeof(struct hpi_control_res);
+
+	switch (pC->u.i.control_type) {
+
+	case HPI_CONTROL_METER:
+		if (phm->u.c.attribute == HPI_METER_PEAK) {
+			phr->u.c.an_log_value[0] = pC->u.meter.an_log_peak[0];
+			phr->u.c.an_log_value[1] = pC->u.meter.an_log_peak[1];
+		} else if (phm->u.c.attribute == HPI_METER_RMS) {
+			if (pC->u.meter.an_logRMS[0] ==
+				HPI_CACHE_INVALID_SHORT) {
+				phr->error =
+					HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
+				phr->u.c.an_log_value[0] = HPI_METER_MINIMUM;
+				phr->u.c.an_log_value[1] = HPI_METER_MINIMUM;
+			} else {
+				phr->u.c.an_log_value[0] =
+					pC->u.meter.an_logRMS[0];
+				phr->u.c.an_log_value[1] =
+					pC->u.meter.an_logRMS[1];
+			}
+		} else
+			found = 0;
+		break;
+	case HPI_CONTROL_VOLUME:
+		if (phm->u.c.attribute == HPI_VOLUME_GAIN) {
+			phr->u.c.an_log_value[0] = pC->u.vol.an_log[0];
+			phr->u.c.an_log_value[1] = pC->u.vol.an_log[1];
+		} else if (phm->u.c.attribute == HPI_VOLUME_MUTE) {
+			if (pC->u.vol.flags & HPI_VOLUME_FLAG_HAS_MUTE) {
+				if (pC->u.vol.flags & HPI_VOLUME_FLAG_MUTED)
+					phr->u.c.param1 =
+						HPI_BITMASK_ALL_CHANNELS;
+				else
+					phr->u.c.param1 = 0;
+			} else {
+				phr->error =
+					HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
+				phr->u.c.param1 = 0;
+			}
+		} else {
+			found = 0;
+		}
+		break;
+	case HPI_CONTROL_MULTIPLEXER:
+		if (phm->u.c.attribute == HPI_MULTIPLEXER_SOURCE) {
+			phr->u.c.param1 = pC->u.mux.source_node_type;
+			phr->u.c.param2 = pC->u.mux.source_node_index;
+		} else {
+			found = 0;
+		}
+		break;
+	case HPI_CONTROL_CHANNEL_MODE:
+		if (phm->u.c.attribute == HPI_CHANNEL_MODE_MODE)
+			phr->u.c.param1 = pC->u.mode.mode;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_LEVEL:
+		if (phm->u.c.attribute == HPI_LEVEL_GAIN) {
+			phr->u.c.an_log_value[0] = pC->u.level.an_log[0];
+			phr->u.c.an_log_value[1] = pC->u.level.an_log[1];
+		} else
+			found = 0;
+		break;
+	case HPI_CONTROL_TUNER:
+		if (phm->u.c.attribute == HPI_TUNER_FREQ)
+			phr->u.c.param1 = pC->u.tuner.freq_ink_hz;
+		else if (phm->u.c.attribute == HPI_TUNER_BAND)
+			phr->u.c.param1 = pC->u.tuner.band;
+		else if (phm->u.c.attribute == HPI_TUNER_LEVEL_AVG)
+			if (pC->u.tuner.s_level_avg ==
+				HPI_CACHE_INVALID_SHORT) {
+				phr->u.cu.tuner.s_level = 0;
+				phr->error =
+					HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
+			} else
+				phr->u.cu.tuner.s_level =
+					pC->u.tuner.s_level_avg;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_AESEBU_RECEIVER:
+		if (phm->u.c.attribute == HPI_AESEBURX_ERRORSTATUS)
+			phr->u.c.param1 = pC->u.aes3rx.error_status;
+		else if (phm->u.c.attribute == HPI_AESEBURX_FORMAT)
+			phr->u.c.param1 = pC->u.aes3rx.format;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_AESEBU_TRANSMITTER:
+		if (phm->u.c.attribute == HPI_AESEBUTX_FORMAT)
+			phr->u.c.param1 = pC->u.aes3tx.format;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_TONEDETECTOR:
+		if (phm->u.c.attribute == HPI_TONEDETECTOR_STATE)
+			phr->u.c.param1 = pC->u.tone.state;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_SILENCEDETECTOR:
+		if (phm->u.c.attribute == HPI_SILENCEDETECTOR_STATE) {
+			phr->u.c.param1 = pC->u.silence.state;
+		} else
+			found = 0;
+		break;
+	case HPI_CONTROL_MICROPHONE:
+		if (phm->u.c.attribute == HPI_MICROPHONE_PHANTOM_POWER)
+			phr->u.c.param1 = pC->u.microphone.phantom_state;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_SAMPLECLOCK:
+		if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE)
+			phr->u.c.param1 = pC->u.clk.source;
+		else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE_INDEX) {
+			if (pC->u.clk.source_index ==
+				HPI_CACHE_INVALID_UINT16) {
+				phr->u.c.param1 = 0;
+				phr->error =
+					HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
+			} else
+				phr->u.c.param1 = pC->u.clk.source_index;
+		} else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SAMPLERATE)
+			phr->u.c.param1 = pC->u.clk.sample_rate;
+		else
+			found = 0;
+		break;
+	case HPI_CONTROL_PAD:{
+			struct hpi_control_cache_pad *p_pad;
+			p_pad = (struct hpi_control_cache_pad *)pC;
+
+			if (!(p_pad->field_valid_flags & (1 <<
+						HPI_CTL_ATTR_INDEX(phm->u.c.
+							attribute)))) {
+				phr->error =
+					HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
+				break;
+			}
+
+			if (phm->u.c.attribute == HPI_PAD_PROGRAM_ID)
+				phr->u.c.param1 = p_pad->pI;
+			else if (phm->u.c.attribute == HPI_PAD_PROGRAM_TYPE)
+				phr->u.c.param1 = p_pad->pTY;
+			else {
+				unsigned int index =
+					HPI_CTL_ATTR_INDEX(phm->u.c.
+					attribute) - 1;
+				unsigned int offset = phm->u.c.param1;
+				unsigned int pad_string_len, field_size;
+				char *pad_string;
+				unsigned int tocopy;
+
+				if (index > ARRAY_SIZE(pad_desc) - 1) {
+					phr->error =
+						HPI_ERROR_INVALID_CONTROL_ATTRIBUTE;
+					break;
+				}
+
+				pad_string =
+					((char *)p_pad) +
+					pad_desc[index].offset;
+				field_size = pad_desc[index].field_size;
+				/* Ensure null terminator */
+				pad_string[field_size - 1] = 0;
+
+				pad_string_len = strlen(pad_string) + 1;
+
+				if (offset > pad_string_len) {
+					phr->error =
+						HPI_ERROR_INVALID_CONTROL_VALUE;
+					break;
+				}
+
+				tocopy = pad_string_len - offset;
+				if (tocopy > sizeof(phr->u.cu.chars8.sz_data))
+					tocopy = sizeof(phr->u.cu.chars8.
+						sz_data);
+
+				memcpy(phr->u.cu.chars8.sz_data,
+					&pad_string[offset], tocopy);
+
+				phr->u.cu.chars8.remaining_chars =
+					pad_string_len - offset - tocopy;
+			}
+		}
+		break;
+	default:
+		found = 0;
+		break;
+	}
+
+	HPI_DEBUG_LOG(VERBOSE, "%s Adap %d, Ctl %d, Type %d, Attr %d\n",
+		found ? "Cached" : "Uncached", phm->adapter_index,
+		pC->u.i.control_index, pC->u.i.control_type,
+		phm->u.c.attribute);
+
+	if (found) {
+		phr->size = (u16)response_size;
+		phr->type = HPI_TYPE_RESPONSE;
+		phr->object = phm->object;
+		phr->function = phm->function;
+	}
+
+	return found;
+}
+
+short hpi_check_control_cache(struct hpi_control_cache *p_cache,
+	struct hpi_message *phm, struct hpi_response *phr)
+{
+	struct hpi_control_cache_info *pI;
+
+	if (!find_control(phm->obj_index, p_cache, &pI)) {
+		HPI_DEBUG_LOG(VERBOSE,
+			"HPICMN find_control() failed for adap %d\n",
+			phm->adapter_index);
+		return 0;
+	}
+
+	phr->error = 0;
+	phr->specific_error = 0;
+	phr->version = 0;
+
+	return hpi_check_control_cache_single((struct hpi_control_cache_single
+			*)pI, phm, phr);
+}
+
+/** Updates the cache with Set values.
+
+Only update if no error.
+Volume and Level return the limited values in the response, so use these
+Multiplexer does so use sent values
+*/
+void hpi_cmn_control_cache_sync_to_msg_single(struct hpi_control_cache_single
+	*pC, struct hpi_message *phm, struct hpi_response *phr)
+{
+	switch (pC->u.i.control_type) {
+	case HPI_CONTROL_VOLUME:
+		if (phm->u.c.attribute == HPI_VOLUME_GAIN) {
+			pC->u.vol.an_log[0] = phr->u.c.an_log_value[0];
+			pC->u.vol.an_log[1] = phr->u.c.an_log_value[1];
+		} else if (phm->u.c.attribute == HPI_VOLUME_MUTE) {
+			if (phm->u.c.param1)
+				pC->u.vol.flags |= HPI_VOLUME_FLAG_MUTED;
+			else
+				pC->u.vol.flags &= ~HPI_VOLUME_FLAG_MUTED;
+		}
+		break;
+	case HPI_CONTROL_MULTIPLEXER:
+		/* mux does not return its setting on Set command. */
+		if (phm->u.c.attribute == HPI_MULTIPLEXER_SOURCE) {
+			pC->u.mux.source_node_type = (u16)phm->u.c.param1;
+			pC->u.mux.source_node_index = (u16)phm->u.c.param2;
+		}
+		break;
+	case HPI_CONTROL_CHANNEL_MODE:
+		/* mode does not return its setting on Set command. */
+		if (phm->u.c.attribute == HPI_CHANNEL_MODE_MODE)
+			pC->u.mode.mode = (u16)phm->u.c.param1;
+		break;
+	case HPI_CONTROL_LEVEL:
+		if (phm->u.c.attribute == HPI_LEVEL_GAIN) {
+			pC->u.vol.an_log[0] = phr->u.c.an_log_value[0];
+			pC->u.vol.an_log[1] = phr->u.c.an_log_value[1];
+		}
+		break;
+	case HPI_CONTROL_MICROPHONE:
+		if (phm->u.c.attribute == HPI_MICROPHONE_PHANTOM_POWER)
+			pC->u.microphone.phantom_state = (u16)phm->u.c.param1;
+		break;
+	case HPI_CONTROL_AESEBU_TRANSMITTER:
+		if (phm->u.c.attribute == HPI_AESEBUTX_FORMAT)
+			pC->u.aes3tx.format = phm->u.c.param1;
+		break;
+	case HPI_CONTROL_AESEBU_RECEIVER:
+		if (phm->u.c.attribute == HPI_AESEBURX_FORMAT)
+			pC->u.aes3rx.format = phm->u.c.param1;
+		break;
+	case HPI_CONTROL_SAMPLECLOCK:
+		if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE)
+			pC->u.clk.source = (u16)phm->u.c.param1;
+		else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SOURCE_INDEX)
+			pC->u.clk.source_index = (u16)phm->u.c.param1;
+		else if (phm->u.c.attribute == HPI_SAMPLECLOCK_SAMPLERATE)
+			pC->u.clk.sample_rate = phm->u.c.param1;
+		break;
+	default:
+		break;
+	}
+}
+
+void hpi_cmn_control_cache_sync_to_msg(struct hpi_control_cache *p_cache,
+	struct hpi_message *phm, struct hpi_response *phr)
+{
+	struct hpi_control_cache_single *pC;
+	struct hpi_control_cache_info *pI;
+
+	if (phr->error)
+		return;
+
+	if (!find_control(phm->obj_index, p_cache, &pI)) {
+		HPI_DEBUG_LOG(VERBOSE,
+			"HPICMN find_control() failed for adap %d\n",
+			phm->adapter_index);
+		return;
+	}
+
+	/* pC is the default cached control strucure.
+	   May be cast to something else in the following switch statement.
+	 */
+	pC = (struct hpi_control_cache_single *)pI;
+
+	hpi_cmn_control_cache_sync_to_msg_single(pC, phm, phr);
+}
+
+/** Allocate control cache.
+
+\return Cache pointer, or NULL if allocation fails.
+*/
+struct hpi_control_cache *hpi_alloc_control_cache(const u32 control_count,
+	const u32 size_in_bytes, u8 *p_dsp_control_buffer)
+{
+	struct hpi_control_cache *p_cache =
+		kmalloc(sizeof(*p_cache), GFP_KERNEL);
+	if (!p_cache)
+		return NULL;
+
+	p_cache->p_info =
+		kcalloc(control_count, sizeof(*p_cache->p_info), GFP_KERNEL);
+	if (!p_cache->p_info) {
+		kfree(p_cache);
+		return NULL;
+	}
+
+	p_cache->cache_size_in_bytes = size_in_bytes;
+	p_cache->control_count = control_count;
+	p_cache->p_cache = p_dsp_control_buffer;
+	p_cache->init = 0;
+	return p_cache;
+}
+
+void hpi_free_control_cache(struct hpi_control_cache *p_cache)
+{
+	if (p_cache) {
+		kfree(p_cache->p_info);
+		kfree(p_cache);
+	}
+}
+
+static void subsys_message(struct hpi_message *phm, struct hpi_response *phr)
+{
+	hpi_init_response(phr, HPI_OBJ_SUBSYSTEM, phm->function, 0);
+
+	switch (phm->function) {
+	case HPI_SUBSYS_OPEN:
+	case HPI_SUBSYS_CLOSE:
+	case HPI_SUBSYS_DRIVER_UNLOAD:
+		break;
+	case HPI_SUBSYS_DRIVER_LOAD:
+		wipe_adapter_list();
+		hpios_alistlock_init(&adapters);
+		break;
+	case HPI_SUBSYS_GET_ADAPTER:
+		subsys_get_adapter(phm, phr);
+		break;
+	case HPI_SUBSYS_GET_NUM_ADAPTERS:
+		phr->u.s.num_adapters = adapters.gw_num_adapters;
+		break;
+	case HPI_SUBSYS_CREATE_ADAPTER:
+		break;
+	default:
+		phr->error = HPI_ERROR_INVALID_FUNC;
+		break;
+	}
+}
+
+void HPI_COMMON(struct hpi_message *phm, struct hpi_response *phr)
+{
+	switch (phm->type) {
+	case HPI_TYPE_REQUEST:
+		switch (phm->object) {
+		case HPI_OBJ_SUBSYSTEM:
+			subsys_message(phm, phr);
+			break;
+		}
+		break;
+
+	default:
+		phr->error = HPI_ERROR_INVALID_TYPE;
+		break;
+	}
+}