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, 573 insertions, 0 deletions

diff --git a/sound/soc/intel/atom/sst/sst.c b/sound/soc/intel/atom/sst/sst.c
new file mode 100644
index 000000000..a0d29510d
--- /dev/null
+++ b/sound/soc/intel/atom/sst/sst.c
@@ -0,0 +1,573 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  sst.c - Intel SST Driver for audio engine
+ *
+ *  Copyright (C) 2008-14	Intel Corp
+ *  Authors:	Vinod Koul <vinod.koul@intel.com>
+ *		Harsha Priya <priya.harsha@intel.com>
+ *		Dharageswari R <dharageswari.r@intel.com>
+ *		KP Jeeja <jeeja.kp@intel.com>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_qos.h>
+#include <linux/async.h>
+#include <linux/acpi.h>
+#include <linux/sysfs.h>
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <asm/platform_sst_audio.h>
+#include "../sst-mfld-platform.h"
+#include "sst.h"
+
+MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
+MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
+MODULE_DESCRIPTION("Intel (R) SST(R) Audio Engine Driver");
+MODULE_LICENSE("GPL v2");
+
+static inline bool sst_is_process_reply(u32 msg_id)
+{
+	return ((msg_id & PROCESS_MSG) ? true : false);
+}
+
+static inline bool sst_validate_mailbox_size(unsigned int size)
+{
+	return ((size <= SST_MAILBOX_SIZE) ? true : false);
+}
+
+static irqreturn_t intel_sst_interrupt_mrfld(int irq, void *context)
+{
+	union interrupt_reg_mrfld isr;
+	union ipc_header_mrfld header;
+	union sst_imr_reg_mrfld imr;
+	struct ipc_post *msg = NULL;
+	unsigned int size;
+	struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
+	irqreturn_t retval = IRQ_HANDLED;
+
+	/* Interrupt arrived, check src */
+	isr.full = sst_shim_read64(drv->shim, SST_ISRX);
+
+	if (isr.part.done_interrupt) {
+		/* Clear done bit */
+		spin_lock(&drv->ipc_spin_lock);
+		header.full = sst_shim_read64(drv->shim,
+					drv->ipc_reg.ipcx);
+		header.p.header_high.part.done = 0;
+		sst_shim_write64(drv->shim, drv->ipc_reg.ipcx, header.full);
+
+		/* write 1 to clear status register */;
+		isr.part.done_interrupt = 1;
+		sst_shim_write64(drv->shim, SST_ISRX, isr.full);
+		spin_unlock(&drv->ipc_spin_lock);
+
+		/* we can send more messages to DSP so trigger work */
+		queue_work(drv->post_msg_wq, &drv->ipc_post_msg_wq);
+		retval = IRQ_HANDLED;
+	}
+
+	if (isr.part.busy_interrupt) {
+		/* message from dsp so copy that */
+		spin_lock(&drv->ipc_spin_lock);
+		imr.full = sst_shim_read64(drv->shim, SST_IMRX);
+		imr.part.busy_interrupt = 1;
+		sst_shim_write64(drv->shim, SST_IMRX, imr.full);
+		spin_unlock(&drv->ipc_spin_lock);
+		header.full =  sst_shim_read64(drv->shim, drv->ipc_reg.ipcd);
+
+		if (sst_create_ipc_msg(&msg, header.p.header_high.part.large)) {
+			drv->ops->clear_interrupt(drv);
+			return IRQ_HANDLED;
+		}
+
+		if (header.p.header_high.part.large) {
+			size = header.p.header_low_payload;
+			if (sst_validate_mailbox_size(size)) {
+				memcpy_fromio(msg->mailbox_data,
+					drv->mailbox + drv->mailbox_recv_offset, size);
+			} else {
+				dev_err(drv->dev,
+					"Mailbox not copied, payload size is: %u\n", size);
+				header.p.header_low_payload = 0;
+			}
+		}
+
+		msg->mrfld_header = header;
+		msg->is_process_reply =
+			sst_is_process_reply(header.p.header_high.part.msg_id);
+		spin_lock(&drv->rx_msg_lock);
+		list_add_tail(&msg->node, &drv->rx_list);
+		spin_unlock(&drv->rx_msg_lock);
+		drv->ops->clear_interrupt(drv);
+		retval = IRQ_WAKE_THREAD;
+	}
+	return retval;
+}
+
+static irqreturn_t intel_sst_irq_thread_mrfld(int irq, void *context)
+{
+	struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
+	struct ipc_post *__msg, *msg;
+	unsigned long irq_flags;
+
+	spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
+	if (list_empty(&drv->rx_list)) {
+		spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
+		return IRQ_HANDLED;
+	}
+
+	list_for_each_entry_safe(msg, __msg, &drv->rx_list, node) {
+		list_del(&msg->node);
+		spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
+		if (msg->is_process_reply)
+			drv->ops->process_message(msg);
+		else
+			drv->ops->process_reply(drv, msg);
+
+		if (msg->is_large)
+			kfree(msg->mailbox_data);
+		kfree(msg);
+		spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
+	}
+	spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
+	return IRQ_HANDLED;
+}
+
+static int sst_save_dsp_context_v2(struct intel_sst_drv *sst)
+{
+	int ret = 0;
+
+	ret = sst_prepare_and_post_msg(sst, SST_TASK_ID_MEDIA, IPC_CMD,
+			IPC_PREP_D3, PIPE_RSVD, 0, NULL, NULL,
+			true, true, false, true);
+
+	if (ret < 0) {
+		dev_err(sst->dev, "not suspending FW!!, Err: %d\n", ret);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+
+static struct intel_sst_ops mrfld_ops = {
+	.interrupt = intel_sst_interrupt_mrfld,
+	.irq_thread = intel_sst_irq_thread_mrfld,
+	.clear_interrupt = intel_sst_clear_intr_mrfld,
+	.start = sst_start_mrfld,
+	.reset = intel_sst_reset_dsp_mrfld,
+	.post_message = sst_post_message_mrfld,
+	.process_reply = sst_process_reply_mrfld,
+	.save_dsp_context =  sst_save_dsp_context_v2,
+	.alloc_stream = sst_alloc_stream_mrfld,
+	.post_download = sst_post_download_mrfld,
+};
+
+int sst_driver_ops(struct intel_sst_drv *sst)
+{
+
+	switch (sst->dev_id) {
+	case SST_MRFLD_PCI_ID:
+	case SST_BYT_ACPI_ID:
+	case SST_CHV_ACPI_ID:
+		sst->tstamp = SST_TIME_STAMP_MRFLD;
+		sst->ops = &mrfld_ops;
+		return 0;
+
+	default:
+		dev_err(sst->dev,
+			"SST Driver capabilities missing for dev_id: %x",
+			sst->dev_id);
+		return -EINVAL;
+	}
+}
+
+void sst_process_pending_msg(struct work_struct *work)
+{
+	struct intel_sst_drv *ctx = container_of(work,
+			struct intel_sst_drv, ipc_post_msg_wq);
+
+	ctx->ops->post_message(ctx, NULL, false);
+}
+
+static int sst_workqueue_init(struct intel_sst_drv *ctx)
+{
+	INIT_LIST_HEAD(&ctx->memcpy_list);
+	INIT_LIST_HEAD(&ctx->rx_list);
+	INIT_LIST_HEAD(&ctx->ipc_dispatch_list);
+	INIT_LIST_HEAD(&ctx->block_list);
+	INIT_WORK(&ctx->ipc_post_msg_wq, sst_process_pending_msg);
+	init_waitqueue_head(&ctx->wait_queue);
+
+	ctx->post_msg_wq =
+		create_singlethread_workqueue("sst_post_msg_wq");
+	if (!ctx->post_msg_wq)
+		return -EBUSY;
+	return 0;
+}
+
+static void sst_init_locks(struct intel_sst_drv *ctx)
+{
+	mutex_init(&ctx->sst_lock);
+	spin_lock_init(&ctx->rx_msg_lock);
+	spin_lock_init(&ctx->ipc_spin_lock);
+	spin_lock_init(&ctx->block_lock);
+}
+
+int sst_alloc_drv_context(struct intel_sst_drv **ctx,
+		struct device *dev, unsigned int dev_id)
+{
+	*ctx = devm_kzalloc(dev, sizeof(struct intel_sst_drv), GFP_KERNEL);
+	if (!(*ctx))
+		return -ENOMEM;
+
+	(*ctx)->dev = dev;
+	(*ctx)->dev_id = dev_id;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(sst_alloc_drv_context);
+
+static ssize_t firmware_version_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+
+	if (ctx->fw_version.type == 0 && ctx->fw_version.major == 0 &&
+	    ctx->fw_version.minor == 0 && ctx->fw_version.build == 0)
+		return sysfs_emit(buf, "FW not yet loaded\n");
+	else
+		return sysfs_emit(buf, "v%02x.%02x.%02x.%02x\n",
+				  ctx->fw_version.type, ctx->fw_version.major,
+				  ctx->fw_version.minor, ctx->fw_version.build);
+
+}
+
+static DEVICE_ATTR_RO(firmware_version);
+
+static const struct attribute *sst_fw_version_attrs[] = {
+	&dev_attr_firmware_version.attr,
+	NULL,
+};
+
+static const struct attribute_group sst_fw_version_attr_group = {
+	.attrs = (struct attribute **)sst_fw_version_attrs,
+};
+
+int sst_context_init(struct intel_sst_drv *ctx)
+{
+	int ret = 0, i;
+
+	if (!ctx->pdata)
+		return -EINVAL;
+
+	if (!ctx->pdata->probe_data)
+		return -EINVAL;
+
+	memcpy(&ctx->info, ctx->pdata->probe_data, sizeof(ctx->info));
+
+	ret = sst_driver_ops(ctx);
+	if (ret != 0)
+		return -EINVAL;
+
+	sst_init_locks(ctx);
+	sst_set_fw_state_locked(ctx, SST_RESET);
+
+	/* pvt_id 0 reserved for async messages */
+	ctx->pvt_id = 1;
+	ctx->stream_cnt = 0;
+	ctx->fw_in_mem = NULL;
+	/* we use memcpy, so set to 0 */
+	ctx->use_dma = 0;
+	ctx->use_lli = 0;
+
+	if (sst_workqueue_init(ctx))
+		return -EINVAL;
+
+	ctx->mailbox_recv_offset = ctx->pdata->ipc_info->mbox_recv_off;
+	ctx->ipc_reg.ipcx = SST_IPCX + ctx->pdata->ipc_info->ipc_offset;
+	ctx->ipc_reg.ipcd = SST_IPCD + ctx->pdata->ipc_info->ipc_offset;
+
+	dev_info(ctx->dev, "Got drv data max stream %d\n",
+				ctx->info.max_streams);
+
+	for (i = 1; i <= ctx->info.max_streams; i++) {
+		struct stream_info *stream = &ctx->streams[i];
+
+		memset(stream, 0, sizeof(*stream));
+		stream->pipe_id = PIPE_RSVD;
+		mutex_init(&stream->lock);
+	}
+
+	/* Register the ISR */
+	ret = devm_request_threaded_irq(ctx->dev, ctx->irq_num, ctx->ops->interrupt,
+					ctx->ops->irq_thread, 0, SST_DRV_NAME,
+					ctx);
+	if (ret)
+		goto do_free_mem;
+
+	dev_dbg(ctx->dev, "Registered IRQ %#x\n", ctx->irq_num);
+
+	/* default intr are unmasked so set this as masked */
+	sst_shim_write64(ctx->shim, SST_IMRX, 0xFFFF0038);
+
+	ctx->qos = devm_kzalloc(ctx->dev,
+		sizeof(struct pm_qos_request), GFP_KERNEL);
+	if (!ctx->qos) {
+		ret = -ENOMEM;
+		goto do_free_mem;
+	}
+	cpu_latency_qos_add_request(ctx->qos, PM_QOS_DEFAULT_VALUE);
+
+	dev_dbg(ctx->dev, "Requesting FW %s now...\n", ctx->firmware_name);
+	ret = request_firmware_nowait(THIS_MODULE, true, ctx->firmware_name,
+				      ctx->dev, GFP_KERNEL, ctx, sst_firmware_load_cb);
+	if (ret) {
+		dev_err(ctx->dev, "Firmware download failed:%d\n", ret);
+		goto do_free_mem;
+	}
+
+	ret = sysfs_create_group(&ctx->dev->kobj,
+				 &sst_fw_version_attr_group);
+	if (ret) {
+		dev_err(ctx->dev,
+			"Unable to create sysfs\n");
+		goto err_sysfs;
+	}
+
+	sst_register(ctx->dev);
+	return 0;
+err_sysfs:
+	sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
+
+do_free_mem:
+	destroy_workqueue(ctx->post_msg_wq);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sst_context_init);
+
+void sst_context_cleanup(struct intel_sst_drv *ctx)
+{
+	pm_runtime_get_noresume(ctx->dev);
+	pm_runtime_disable(ctx->dev);
+	sst_unregister(ctx->dev);
+	sst_set_fw_state_locked(ctx, SST_SHUTDOWN);
+	sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
+	destroy_workqueue(ctx->post_msg_wq);
+	cpu_latency_qos_remove_request(ctx->qos);
+	kfree(ctx->fw_sg_list.src);
+	kfree(ctx->fw_sg_list.dst);
+	ctx->fw_sg_list.list_len = 0;
+	kfree(ctx->fw_in_mem);
+	ctx->fw_in_mem = NULL;
+	sst_memcpy_free_resources(ctx);
+}
+EXPORT_SYMBOL_GPL(sst_context_cleanup);
+
+void sst_configure_runtime_pm(struct intel_sst_drv *ctx)
+{
+	pm_runtime_set_autosuspend_delay(ctx->dev, SST_SUSPEND_DELAY);
+	pm_runtime_use_autosuspend(ctx->dev);
+	/*
+	 * For acpi devices, the actual physical device state is
+	 * initially active. So change the state to active before
+	 * enabling the pm
+	 */
+
+	if (!acpi_disabled)
+		pm_runtime_set_active(ctx->dev);
+
+	pm_runtime_enable(ctx->dev);
+
+	if (acpi_disabled)
+		pm_runtime_set_active(ctx->dev);
+	else
+		pm_runtime_put_noidle(ctx->dev);
+}
+EXPORT_SYMBOL_GPL(sst_configure_runtime_pm);
+
+static int intel_sst_runtime_suspend(struct device *dev)
+{
+	int ret = 0;
+	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+
+	if (ctx->sst_state == SST_RESET) {
+		dev_dbg(dev, "LPE is already in RESET state, No action\n");
+		return 0;
+	}
+	/* save fw context */
+	if (ctx->ops->save_dsp_context(ctx))
+		return -EBUSY;
+
+	/* Move the SST state to Reset */
+	sst_set_fw_state_locked(ctx, SST_RESET);
+
+	synchronize_irq(ctx->irq_num);
+	flush_workqueue(ctx->post_msg_wq);
+
+	ctx->ops->reset(ctx);
+
+	return ret;
+}
+
+static int intel_sst_suspend(struct device *dev)
+{
+	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+	struct sst_fw_save *fw_save;
+	int i, ret;
+
+	/* check first if we are already in SW reset */
+	if (ctx->sst_state == SST_RESET)
+		return 0;
+
+	/*
+	 * check if any stream is active and running
+	 * they should already by suspend by soc_suspend
+	 */
+	for (i = 1; i <= ctx->info.max_streams; i++) {
+		struct stream_info *stream = &ctx->streams[i];
+
+		if (stream->status == STREAM_RUNNING) {
+			dev_err(dev, "stream %d is running, can't suspend, abort\n", i);
+			return -EBUSY;
+		}
+
+		if (ctx->pdata->streams_lost_on_suspend) {
+			stream->resume_status = stream->status;
+			stream->resume_prev = stream->prev;
+			if (stream->status != STREAM_UN_INIT)
+				sst_free_stream(ctx, i);
+		}
+	}
+	synchronize_irq(ctx->irq_num);
+	flush_workqueue(ctx->post_msg_wq);
+
+	/* Move the SST state to Reset */
+	sst_set_fw_state_locked(ctx, SST_RESET);
+
+	/* tell DSP we are suspending */
+	if (ctx->ops->save_dsp_context(ctx))
+		return -EBUSY;
+
+	/* save the memories */
+	fw_save = kzalloc(sizeof(*fw_save), GFP_KERNEL);
+	if (!fw_save)
+		return -ENOMEM;
+	fw_save->iram = kvzalloc(ctx->iram_end - ctx->iram_base, GFP_KERNEL);
+	if (!fw_save->iram) {
+		ret = -ENOMEM;
+		goto iram;
+	}
+	fw_save->dram = kvzalloc(ctx->dram_end - ctx->dram_base, GFP_KERNEL);
+	if (!fw_save->dram) {
+		ret = -ENOMEM;
+		goto dram;
+	}
+	fw_save->sram = kvzalloc(SST_MAILBOX_SIZE, GFP_KERNEL);
+	if (!fw_save->sram) {
+		ret = -ENOMEM;
+		goto sram;
+	}
+
+	fw_save->ddr = kvzalloc(ctx->ddr_end - ctx->ddr_base, GFP_KERNEL);
+	if (!fw_save->ddr) {
+		ret = -ENOMEM;
+		goto ddr;
+	}
+
+	memcpy32_fromio(fw_save->iram, ctx->iram, ctx->iram_end - ctx->iram_base);
+	memcpy32_fromio(fw_save->dram, ctx->dram, ctx->dram_end - ctx->dram_base);
+	memcpy32_fromio(fw_save->sram, ctx->mailbox, SST_MAILBOX_SIZE);
+	memcpy32_fromio(fw_save->ddr, ctx->ddr, ctx->ddr_end - ctx->ddr_base);
+
+	ctx->fw_save = fw_save;
+	ctx->ops->reset(ctx);
+	return 0;
+ddr:
+	kvfree(fw_save->sram);
+sram:
+	kvfree(fw_save->dram);
+dram:
+	kvfree(fw_save->iram);
+iram:
+	kfree(fw_save);
+	return ret;
+}
+
+static int intel_sst_resume(struct device *dev)
+{
+	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+	struct sst_fw_save *fw_save = ctx->fw_save;
+	struct sst_block *block;
+	int i, ret = 0;
+
+	if (!fw_save)
+		return 0;
+
+	sst_set_fw_state_locked(ctx, SST_FW_LOADING);
+
+	/* we have to restore the memory saved */
+	ctx->ops->reset(ctx);
+
+	ctx->fw_save = NULL;
+
+	memcpy32_toio(ctx->iram, fw_save->iram, ctx->iram_end - ctx->iram_base);
+	memcpy32_toio(ctx->dram, fw_save->dram, ctx->dram_end - ctx->dram_base);
+	memcpy32_toio(ctx->mailbox, fw_save->sram, SST_MAILBOX_SIZE);
+	memcpy32_toio(ctx->ddr, fw_save->ddr, ctx->ddr_end - ctx->ddr_base);
+
+	kvfree(fw_save->sram);
+	kvfree(fw_save->dram);
+	kvfree(fw_save->iram);
+	kvfree(fw_save->ddr);
+	kfree(fw_save);
+
+	block = sst_create_block(ctx, 0, FW_DWNL_ID);
+	if (block == NULL)
+		return -ENOMEM;
+
+
+	/* start and wait for ack */
+	ctx->ops->start(ctx);
+	ret = sst_wait_timeout(ctx, block);
+	if (ret) {
+		dev_err(ctx->dev, "fw download failed %d\n", ret);
+		/* FW download failed due to timeout */
+		ret = -EBUSY;
+
+	} else {
+		sst_set_fw_state_locked(ctx, SST_FW_RUNNING);
+	}
+
+	if (ctx->pdata->streams_lost_on_suspend) {
+		for (i = 1; i <= ctx->info.max_streams; i++) {
+			struct stream_info *stream = &ctx->streams[i];
+
+			if (stream->resume_status != STREAM_UN_INIT) {
+				dev_dbg(ctx->dev, "Re-allocing stream %d status %d prev %d\n",
+					i, stream->resume_status,
+					stream->resume_prev);
+				sst_realloc_stream(ctx, i);
+				stream->status = stream->resume_status;
+				stream->prev = stream->resume_prev;
+			}
+		}
+	}
+
+	sst_free_block(ctx, block);
+	return ret;
+}
+
+const struct dev_pm_ops intel_sst_pm = {
+	.suspend = intel_sst_suspend,
+	.resume = intel_sst_resume,
+	.runtime_suspend = intel_sst_runtime_suspend,
+};
+EXPORT_SYMBOL_GPL(intel_sst_pm);