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, 425 insertions, 0 deletions

diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c
new file mode 100644
index 000000000..ee59ef36b
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6apm-dai.c
@@ -0,0 +1,425 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2021, Linaro Limited
+
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm.h>
+#include <asm/dma.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
+#include <sound/pcm_params.h>
+#include "q6apm.h"
+
+#define DRV_NAME "q6apm-dai"
+
+#define PLAYBACK_MIN_NUM_PERIODS	2
+#define PLAYBACK_MAX_NUM_PERIODS	8
+#define PLAYBACK_MAX_PERIOD_SIZE	65536
+#define PLAYBACK_MIN_PERIOD_SIZE	128
+#define CAPTURE_MIN_NUM_PERIODS		2
+#define CAPTURE_MAX_NUM_PERIODS		8
+#define CAPTURE_MAX_PERIOD_SIZE		4096
+#define CAPTURE_MIN_PERIOD_SIZE		320
+#define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
+#define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
+#define SID_MASK_DEFAULT	0xF
+
+enum stream_state {
+	Q6APM_STREAM_IDLE = 0,
+	Q6APM_STREAM_STOPPED,
+	Q6APM_STREAM_RUNNING,
+};
+
+struct q6apm_dai_rtd {
+	struct snd_pcm_substream *substream;
+	struct snd_compr_stream *cstream;
+	struct snd_compr_params codec_param;
+	struct snd_dma_buffer dma_buffer;
+	phys_addr_t phys;
+	unsigned int pcm_size;
+	unsigned int pcm_count;
+	unsigned int pos;       /* Buffer position */
+	unsigned int periods;
+	unsigned int bytes_sent;
+	unsigned int bytes_received;
+	unsigned int copied_total;
+	uint16_t bits_per_sample;
+	uint16_t source; /* Encoding source bit mask */
+	uint16_t session_id;
+	enum stream_state state;
+	struct q6apm_graph *graph;
+};
+
+struct q6apm_dai_data {
+	long long sid;
+};
+
+static struct snd_pcm_hardware q6apm_dai_hardware_capture = {
+	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+	.formats =              (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
+	.rates =                SNDRV_PCM_RATE_8000_48000,
+	.rate_min =             8000,
+	.rate_max =             48000,
+	.channels_min =         2,
+	.channels_max =         4,
+	.buffer_bytes_max =     CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
+	.period_bytes_min =	CAPTURE_MIN_PERIOD_SIZE,
+	.period_bytes_max =     CAPTURE_MAX_PERIOD_SIZE,
+	.periods_min =          CAPTURE_MIN_NUM_PERIODS,
+	.periods_max =          CAPTURE_MAX_NUM_PERIODS,
+	.fifo_size =            0,
+};
+
+static struct snd_pcm_hardware q6apm_dai_hardware_playback = {
+	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+	.formats =              (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
+	.rates =                SNDRV_PCM_RATE_8000_192000,
+	.rate_min =             8000,
+	.rate_max =             192000,
+	.channels_min =         2,
+	.channels_max =         8,
+	.buffer_bytes_max =     (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
+	.period_bytes_min =	PLAYBACK_MIN_PERIOD_SIZE,
+	.period_bytes_max =     PLAYBACK_MAX_PERIOD_SIZE,
+	.periods_min =          PLAYBACK_MIN_NUM_PERIODS,
+	.periods_max =          PLAYBACK_MAX_NUM_PERIODS,
+	.fifo_size =            0,
+};
+
+static void event_handler(uint32_t opcode, uint32_t token, uint32_t *payload, void *priv)
+{
+	struct q6apm_dai_rtd *prtd = priv;
+	struct snd_pcm_substream *substream = prtd->substream;
+
+	switch (opcode) {
+	case APM_CLIENT_EVENT_CMD_EOS_DONE:
+		prtd->state = Q6APM_STREAM_STOPPED;
+		break;
+	case APM_CLIENT_EVENT_DATA_WRITE_DONE:
+		prtd->pos += prtd->pcm_count;
+		snd_pcm_period_elapsed(substream);
+		if (prtd->state == Q6APM_STREAM_RUNNING)
+			q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
+
+		break;
+	case APM_CLIENT_EVENT_DATA_READ_DONE:
+		prtd->pos += prtd->pcm_count;
+		snd_pcm_period_elapsed(substream);
+		if (prtd->state == Q6APM_STREAM_RUNNING)
+			q6apm_read(prtd->graph);
+
+		break;
+	default:
+		break;
+	}
+}
+
+static int q6apm_dai_prepare(struct snd_soc_component *component,
+			     struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+	struct audioreach_module_config cfg;
+	struct device *dev = component->dev;
+	struct q6apm_dai_data *pdata;
+	int ret;
+
+	pdata = snd_soc_component_get_drvdata(component);
+	if (!pdata)
+		return -EINVAL;
+
+	if (!prtd || !prtd->graph) {
+		dev_err(dev, "%s: private data null or audio client freed\n", __func__);
+		return -EINVAL;
+	}
+
+	cfg.direction = substream->stream;
+	cfg.sample_rate = runtime->rate;
+	cfg.num_channels = runtime->channels;
+	cfg.bit_width = prtd->bits_per_sample;
+
+	if (prtd->state) {
+		/* clear the previous setup if any  */
+		q6apm_graph_stop(prtd->graph);
+		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
+	}
+
+	prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
+	prtd->pos = 0;
+	/* rate and channels are sent to audio driver */
+	ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
+	if (ret < 0) {
+		dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
+		return ret;
+	}
+
+	ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
+	if (ret < 0)
+		dev_err(dev, "%s: CMD Format block failed\n", __func__);
+
+	ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
+				       (prtd->pcm_size / prtd->periods), prtd->periods);
+
+	if (ret < 0) {
+		dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n",	ret);
+		return -ENOMEM;
+	}
+
+	ret = q6apm_graph_prepare(prtd->graph);
+	if (ret) {
+		dev_err(dev, "Failed to prepare Graph %d\n", ret);
+		return ret;
+	}
+
+	ret = q6apm_graph_start(prtd->graph);
+	if (ret) {
+		dev_err(dev, "Failed to Start Graph %d\n", ret);
+		return ret;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		int i;
+		/* Queue the buffers for Capture ONLY after graph is started */
+		for (i = 0; i < runtime->periods; i++)
+			q6apm_read(prtd->graph);
+
+	}
+
+	/* Now that graph as been prepared and started update the internal state accordingly */
+	prtd->state = Q6APM_STREAM_RUNNING;
+
+	return 0;
+}
+
+static int q6apm_dai_trigger(struct snd_soc_component *component,
+			     struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		 /* start writing buffers for playback only as we already queued capture buffers */
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		/* TODO support be handled via SoftPause Module */
+		prtd->state = Q6APM_STREAM_STOPPED;
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int q6apm_dai_open(struct snd_soc_component *component,
+			  struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_prtd, 0);
+	struct device *dev = component->dev;
+	struct q6apm_dai_data *pdata;
+	struct q6apm_dai_rtd *prtd;
+	int graph_id, ret;
+
+	graph_id = cpu_dai->driver->id;
+
+	pdata = snd_soc_component_get_drvdata(component);
+	if (!pdata) {
+		dev_err(dev, "Drv data not found ..\n");
+		return -EINVAL;
+	}
+
+	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
+	if (prtd == NULL)
+		return -ENOMEM;
+
+	prtd->substream = substream;
+	prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler, prtd, graph_id);
+	if (IS_ERR(prtd->graph)) {
+		dev_err(dev, "%s: Could not allocate memory\n", __func__);
+		ret = PTR_ERR(prtd->graph);
+		goto err;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		runtime->hw = q6apm_dai_hardware_playback;
+	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		runtime->hw = q6apm_dai_hardware_capture;
+
+	/* Ensure that buffer size is a multiple of period size */
+	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
+		goto err;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+						   BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
+		if (ret < 0) {
+			dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
+			goto err;
+		}
+	}
+
+	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
+	if (ret < 0) {
+		dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
+		goto err;
+	}
+
+	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
+	if (ret < 0) {
+		dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
+		goto err;
+	}
+
+	runtime->private_data = prtd;
+	runtime->dma_bytes = BUFFER_BYTES_MAX;
+	if (pdata->sid < 0)
+		prtd->phys = substream->dma_buffer.addr;
+	else
+		prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
+
+	return 0;
+err:
+	kfree(prtd);
+
+	return ret;
+}
+
+static int q6apm_dai_close(struct snd_soc_component *component,
+			   struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+	if (prtd->state) { /* only stop graph that is started */
+		q6apm_graph_stop(prtd->graph);
+		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
+	}
+
+	q6apm_graph_close(prtd->graph);
+	prtd->graph = NULL;
+	kfree(prtd);
+	runtime->private_data = NULL;
+
+	return 0;
+}
+
+static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
+					   struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+	if (prtd->pos == prtd->pcm_size)
+		prtd->pos = 0;
+
+	return bytes_to_frames(runtime, prtd->pos);
+}
+
+static int q6apm_dai_hw_params(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+	prtd->pcm_size = params_buffer_bytes(params);
+	prtd->periods = params_periods(params);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		prtd->bits_per_sample = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		prtd->bits_per_sample = 24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd)
+{
+	int size = BUFFER_BYTES_MAX;
+
+	return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size);
+}
+
+static const struct snd_soc_component_driver q6apm_fe_dai_component = {
+	.name		= DRV_NAME,
+	.open		= q6apm_dai_open,
+	.close		= q6apm_dai_close,
+	.prepare	= q6apm_dai_prepare,
+	.pcm_construct	= q6apm_dai_pcm_new,
+	.hw_params	= q6apm_dai_hw_params,
+	.pointer	= q6apm_dai_pointer,
+	.trigger	= q6apm_dai_trigger,
+};
+
+static int q6apm_dai_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct q6apm_dai_data *pdata;
+	struct of_phandle_args args;
+	int rc;
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
+	if (rc < 0)
+		pdata->sid = -1;
+	else
+		pdata->sid = args.args[0] & SID_MASK_DEFAULT;
+
+	dev_set_drvdata(dev, pdata);
+
+	return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id q6apm_dai_device_id[] = {
+	{ .compatible = "qcom,q6apm-dais" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, q6apm_dai_device_id);
+#endif
+
+static struct platform_driver q6apm_dai_platform_driver = {
+	.driver = {
+		.name = "q6apm-dai",
+		.of_match_table = of_match_ptr(q6apm_dai_device_id),
+	},
+	.probe = q6apm_dai_probe,
+};
+module_platform_driver(q6apm_dai_platform_driver);
+
+MODULE_DESCRIPTION("Q6APM dai driver");
+MODULE_LICENSE("GPL");