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, 592 insertions, 0 deletions

diff --git a/sound/isa/sb/sb8_main.c b/sound/isa/sb/sb8_main.c
new file mode 100644
index 000000000..2ed176a5a
--- /dev/null
+++ b/sound/isa/sb/sb8_main.c
@@ -0,0 +1,592 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *                   Uros Bizjak <uros@kss-loka.si>
+ *
+ *  Routines for control of 8-bit SoundBlaster cards and clones
+ *  Please note: I don't have access to old SB8 soundcards.
+ *
+ * --
+ *
+ * Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
+ *   DSP can't respond to commands whilst in "high speed" mode. Caused 
+ *   glitching during playback. Fixed.
+ *
+ * Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si>
+ *   Cleaned up and rewrote lowlevel routines.
+ */
+
+#include <linux/io.h>
+#include <asm/dma.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/sb.h>
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>");
+MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
+MODULE_LICENSE("GPL");
+
+#define SB8_CLOCK	1000000
+#define SB8_DEN(v)	((SB8_CLOCK + (v) / 2) / (v))
+#define SB8_RATE(v)	(SB8_CLOCK / SB8_DEN(v))
+
+static const struct snd_ratnum clock = {
+	.num = SB8_CLOCK,
+	.den_min = 1,
+	.den_max = 256,
+	.den_step = 1,
+};
+
+static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
+	.nrats = 1,
+	.rats = &clock,
+};
+
+static const struct snd_ratnum stereo_clocks[] = {
+	{
+		.num = SB8_CLOCK,
+		.den_min = SB8_DEN(22050),
+		.den_max = SB8_DEN(22050),
+		.den_step = 1,
+	},
+	{
+		.num = SB8_CLOCK,
+		.den_min = SB8_DEN(11025),
+		.den_max = SB8_DEN(11025),
+		.den_step = 1,
+	}
+};
+
+static int snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params *params,
+					       struct snd_pcm_hw_rule *rule)
+{
+	struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	if (c->min > 1) {
+	  	unsigned int num = 0, den = 0;
+		int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE),
+					  2, stereo_clocks, &num, &den);
+		if (err >= 0 && den) {
+			params->rate_num = num;
+			params->rate_den = den;
+		}
+		return err;
+	}
+	return 0;
+}
+
+static int snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params *params,
+					       struct snd_pcm_hw_rule *rule)
+{
+	struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
+		struct snd_interval t = { .min = 1, .max = 1 };
+		return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t);
+	}
+	return 0;
+}
+
+static int snd_sb8_playback_prepare(struct snd_pcm_substream *substream)
+{
+	unsigned long flags;
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int mixreg, rate, size, count;
+	unsigned char format;
+	unsigned char stereo = runtime->channels > 1;
+	int dma;
+
+	rate = runtime->rate;
+	switch (chip->hardware) {
+	case SB_HW_JAZZ16:
+		if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
+			if (chip->mode & SB_MODE_CAPTURE_16)
+				return -EBUSY;
+			else
+				chip->mode |= SB_MODE_PLAYBACK_16;
+		}
+		chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
+		break;
+	case SB_HW_PRO:
+		if (runtime->channels > 1) {
+			if (snd_BUG_ON(rate != SB8_RATE(11025) &&
+				       rate != SB8_RATE(22050)))
+				return -EINVAL;
+			chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
+			break;
+		}
+		fallthrough;
+	case SB_HW_201:
+		if (rate > 23000) {
+			chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
+			break;
+		}
+		fallthrough;
+	case SB_HW_20:
+		chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
+		break;
+	case SB_HW_10:
+		chip->playback_format = SB_DSP_OUTPUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+	if (chip->mode & SB_MODE_PLAYBACK_16) {
+		format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
+		dma = chip->dma16;
+	} else {
+		format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
+		chip->mode |= SB_MODE_PLAYBACK_8;
+		dma = chip->dma8;
+	}
+	size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
+	count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
+	if (chip->hardware == SB_HW_JAZZ16)
+		snd_sbdsp_command(chip, format);
+	else if (stereo) {
+		/* set playback stereo mode */
+		spin_lock(&chip->mixer_lock);
+		mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
+		snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
+		spin_unlock(&chip->mixer_lock);
+
+		/* Soundblaster hardware programming reference guide, 3-23 */
+		snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
+		runtime->dma_area[0] = 0x80;
+		snd_dma_program(dma, runtime->dma_addr, 1, DMA_MODE_WRITE);
+		/* force interrupt */
+		snd_sbdsp_command(chip, SB_DSP_OUTPUT);
+		snd_sbdsp_command(chip, 0);
+		snd_sbdsp_command(chip, 0);
+	}
+	snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
+	if (stereo) {
+		snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
+		spin_lock(&chip->mixer_lock);
+		/* save output filter status and turn it off */
+		mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT);
+		snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20);
+		spin_unlock(&chip->mixer_lock);
+		/* just use force_mode16 for temporary storate... */
+		chip->force_mode16 = mixreg;
+	} else {
+		snd_sbdsp_command(chip, 256 - runtime->rate_den);
+	}
+	if (chip->playback_format != SB_DSP_OUTPUT) {
+		if (chip->mode & SB_MODE_PLAYBACK_16)
+			count /= 2;
+		count--;
+		snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
+		snd_sbdsp_command(chip, count & 0xff);
+		snd_sbdsp_command(chip, count >> 8);
+	}
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	snd_dma_program(dma, runtime->dma_addr,
+			size, DMA_MODE_WRITE | DMA_AUTOINIT);
+	return 0;
+}
+
+static int snd_sb8_playback_trigger(struct snd_pcm_substream *substream,
+				    int cmd)
+{
+	unsigned long flags;
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	unsigned int count;
+
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_sbdsp_command(chip, chip->playback_format);
+		if (chip->playback_format == SB_DSP_OUTPUT) {
+			count = chip->p_period_size - 1;
+			snd_sbdsp_command(chip, count & 0xff);
+			snd_sbdsp_command(chip, count >> 8);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) {
+			struct snd_pcm_runtime *runtime = substream->runtime;
+			snd_sbdsp_reset(chip);
+			if (runtime->channels > 1) {
+				spin_lock(&chip->mixer_lock);
+				/* restore output filter and set hardware to mono mode */ 
+				snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02);
+				spin_unlock(&chip->mixer_lock);
+			}
+		} else {
+			snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
+		}
+		snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
+	}
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	return 0;
+}
+
+static int snd_sb8_capture_prepare(struct snd_pcm_substream *substream)
+{
+	unsigned long flags;
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int mixreg, rate, size, count;
+	unsigned char format;
+	unsigned char stereo = runtime->channels > 1;
+	int dma;
+
+	rate = runtime->rate;
+	switch (chip->hardware) {
+	case SB_HW_JAZZ16:
+		if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
+			if (chip->mode & SB_MODE_PLAYBACK_16)
+				return -EBUSY;
+			else
+				chip->mode |= SB_MODE_CAPTURE_16;
+		}
+		chip->capture_format = SB_DSP_LO_INPUT_AUTO;
+		break;
+	case SB_HW_PRO:
+		if (runtime->channels > 1) {
+			if (snd_BUG_ON(rate != SB8_RATE(11025) &&
+				       rate != SB8_RATE(22050)))
+				return -EINVAL;
+			chip->capture_format = SB_DSP_HI_INPUT_AUTO;
+			break;
+		}
+		chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO;
+		break;
+	case SB_HW_201:
+		if (rate > 13000) {
+			chip->capture_format = SB_DSP_HI_INPUT_AUTO;
+			break;
+		}
+		fallthrough;
+	case SB_HW_20:
+		chip->capture_format = SB_DSP_LO_INPUT_AUTO;
+		break;
+	case SB_HW_10:
+		chip->capture_format = SB_DSP_INPUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+	if (chip->mode & SB_MODE_CAPTURE_16) {
+		format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
+		dma = chip->dma16;
+	} else {
+		format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
+		chip->mode |= SB_MODE_CAPTURE_8;
+		dma = chip->dma8;
+	}
+	size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
+	count = chip->c_period_size = snd_pcm_lib_period_bytes(substream);
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
+	if (chip->hardware == SB_HW_JAZZ16)
+		snd_sbdsp_command(chip, format);
+	else if (stereo)
+		snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT);
+	snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
+	if (stereo) {
+		snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
+		spin_lock(&chip->mixer_lock);
+		/* save input filter status and turn it off */
+		mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT);
+		snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20);
+		spin_unlock(&chip->mixer_lock);
+		/* just use force_mode16 for temporary storate... */
+		chip->force_mode16 = mixreg;
+	} else {
+		snd_sbdsp_command(chip, 256 - runtime->rate_den);
+	}
+	if (chip->capture_format != SB_DSP_INPUT) {
+		if (chip->mode & SB_MODE_PLAYBACK_16)
+			count /= 2;
+		count--;
+		snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
+		snd_sbdsp_command(chip, count & 0xff);
+		snd_sbdsp_command(chip, count >> 8);
+	}
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	snd_dma_program(dma, runtime->dma_addr,
+			size, DMA_MODE_READ | DMA_AUTOINIT);
+	return 0;
+}
+
+static int snd_sb8_capture_trigger(struct snd_pcm_substream *substream,
+				   int cmd)
+{
+	unsigned long flags;
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	unsigned int count;
+
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_sbdsp_command(chip, chip->capture_format);
+		if (chip->capture_format == SB_DSP_INPUT) {
+			count = chip->c_period_size - 1;
+			snd_sbdsp_command(chip, count & 0xff);
+			snd_sbdsp_command(chip, count >> 8);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) {
+			struct snd_pcm_runtime *runtime = substream->runtime;
+			snd_sbdsp_reset(chip);
+			if (runtime->channels > 1) {
+				/* restore input filter status */
+				spin_lock(&chip->mixer_lock);
+				snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16);
+				spin_unlock(&chip->mixer_lock);
+				/* set hardware to mono mode */
+				snd_sbdsp_command(chip, SB_DSP_MONO_8BIT);
+			}
+		} else {
+			snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
+		}
+		snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
+	}
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	return 0;
+}
+
+irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip)
+{
+	struct snd_pcm_substream *substream;
+
+	snd_sb_ack_8bit(chip);
+	switch (chip->mode) {
+	case SB_MODE_PLAYBACK_16:	/* ok.. playback is active */
+		if (chip->hardware != SB_HW_JAZZ16)
+			break;
+		fallthrough;
+	case SB_MODE_PLAYBACK_8:
+		substream = chip->playback_substream;
+		if (chip->playback_format == SB_DSP_OUTPUT)
+		    	snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
+		snd_pcm_period_elapsed(substream);
+		break;
+	case SB_MODE_CAPTURE_16:
+		if (chip->hardware != SB_HW_JAZZ16)
+			break;
+		fallthrough;
+	case SB_MODE_CAPTURE_8:
+		substream = chip->capture_substream;
+		if (chip->capture_format == SB_DSP_INPUT)
+		    	snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
+		snd_pcm_period_elapsed(substream);
+		break;
+	}
+	return IRQ_HANDLED;
+}
+
+static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	size_t ptr;
+	int dma;
+
+	if (chip->mode & SB_MODE_PLAYBACK_8)
+		dma = chip->dma8;
+	else if (chip->mode & SB_MODE_PLAYBACK_16)
+		dma = chip->dma16;
+	else
+		return 0;
+	ptr = snd_dma_pointer(dma, chip->p_dma_size);
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	size_t ptr;
+	int dma;
+
+	if (chip->mode & SB_MODE_CAPTURE_8)
+		dma = chip->dma8;
+	else if (chip->mode & SB_MODE_CAPTURE_16)
+		dma = chip->dma16;
+	else
+		return 0;
+	ptr = snd_dma_pointer(dma, chip->c_dma_size);
+	return bytes_to_frames(substream->runtime, ptr);
+}
+
+/*
+
+ */
+
+static const struct snd_pcm_hardware snd_sb8_playback =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		 SNDRV_PCM_FMTBIT_U8,
+	.rates =		(SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
+				 SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
+	.rate_min =		4000,
+	.rate_max =		23000,
+	.channels_min =		1,
+	.channels_max =		1,
+	.buffer_bytes_max =	65536,
+	.period_bytes_min =	64,
+	.period_bytes_max =	65536,
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0,
+};
+
+static const struct snd_pcm_hardware snd_sb8_capture =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		SNDRV_PCM_FMTBIT_U8,
+	.rates =		(SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
+				 SNDRV_PCM_RATE_11025),
+	.rate_min =		4000,
+	.rate_max =		13000,
+	.channels_min =		1,
+	.channels_max =		1,
+	.buffer_bytes_max =	65536,
+	.period_bytes_min =	64,
+	.period_bytes_max =	65536,
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0,
+};
+
+/*
+ *
+ */
+ 
+static int snd_sb8_open(struct snd_pcm_substream *substream)
+{
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->open_lock, flags);
+	if (chip->open) {
+		spin_unlock_irqrestore(&chip->open_lock, flags);
+		return -EAGAIN;
+	}
+	chip->open |= SB_OPEN_PCM;
+	spin_unlock_irqrestore(&chip->open_lock, flags);
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		chip->playback_substream = substream;
+		runtime->hw = snd_sb8_playback;
+	} else {
+		chip->capture_substream = substream;
+		runtime->hw = snd_sb8_capture;
+	}
+	switch (chip->hardware) {
+	case SB_HW_JAZZ16:
+		if (chip->dma16 == 5 || chip->dma16 == 7)
+			runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
+		runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
+		runtime->hw.rate_min = 4000;
+		runtime->hw.rate_max = 50000;
+		runtime->hw.channels_max = 2;
+		break;
+	case SB_HW_PRO:
+		runtime->hw.rate_max = 44100;
+		runtime->hw.channels_max = 2;
+		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				    snd_sb8_hw_constraint_rate_channels, NULL,
+				    SNDRV_PCM_HW_PARAM_CHANNELS,
+				    SNDRV_PCM_HW_PARAM_RATE, -1);
+		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				     snd_sb8_hw_constraint_channels_rate, NULL,
+				     SNDRV_PCM_HW_PARAM_RATE, -1);
+		break;
+	case SB_HW_201:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			runtime->hw.rate_max = 44100;
+		} else {
+			runtime->hw.rate_max = 15000;
+		}
+		break;
+	default:
+		break;
+	}
+	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				      &hw_constraints_clock);
+	if (chip->dma8 > 3 || chip->dma16 >= 0) {
+		snd_pcm_hw_constraint_step(runtime, 0,
+					   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2);
+		snd_pcm_hw_constraint_step(runtime, 0,
+					   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2);
+		runtime->hw.buffer_bytes_max = 128 * 1024 * 1024;
+		runtime->hw.period_bytes_max = 128 * 1024 * 1024;
+	}
+	return 0;	
+}
+
+static int snd_sb8_close(struct snd_pcm_substream *substream)
+{
+	unsigned long flags;
+	struct snd_sb *chip = snd_pcm_substream_chip(substream);
+
+	chip->playback_substream = NULL;
+	chip->capture_substream = NULL;
+	spin_lock_irqsave(&chip->open_lock, flags);
+	chip->open &= ~SB_OPEN_PCM;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		chip->mode &= ~SB_MODE_PLAYBACK;
+	else
+		chip->mode &= ~SB_MODE_CAPTURE;
+	spin_unlock_irqrestore(&chip->open_lock, flags);
+	return 0;
+}
+
+/*
+ *  Initialization part
+ */
+ 
+static const struct snd_pcm_ops snd_sb8_playback_ops = {
+	.open =			snd_sb8_open,
+	.close =		snd_sb8_close,
+	.prepare =		snd_sb8_playback_prepare,
+	.trigger =		snd_sb8_playback_trigger,
+	.pointer =		snd_sb8_playback_pointer,
+};
+
+static const struct snd_pcm_ops snd_sb8_capture_ops = {
+	.open =			snd_sb8_open,
+	.close =		snd_sb8_close,
+	.prepare =		snd_sb8_capture_prepare,
+	.trigger =		snd_sb8_capture_trigger,
+	.pointer =		snd_sb8_capture_pointer,
+};
+
+int snd_sb8dsp_pcm(struct snd_sb *chip, int device)
+{
+	struct snd_card *card = chip->card;
+	struct snd_pcm *pcm;
+	int err;
+	size_t max_prealloc = 64 * 1024;
+
+	err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+	sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
+	pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
+	pcm->private_data = chip;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
+
+	if (chip->dma8 > 3 || chip->dma16 >= 0)
+		max_prealloc = 128 * 1024;
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+				       card->dev, 64*1024, max_prealloc);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(snd_sb8dsp_pcm);
+EXPORT_SYMBOL(snd_sb8dsp_interrupt);
+  /* sb8_midi.c */
+EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
+EXPORT_SYMBOL(snd_sb8dsp_midi);