diff options
| author |   Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com> | 2024-10-03 14:54:11 +0300 |
|---|---|---|
| committer |   Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2024-10-22 12:22:20 +0000 |
| commit | 9f40106ff471d77ecd978d4b0b48f560a591420e (patch) | |
| tree | c60b70eadecf2f5741cdc281a064d31ae3172e66 | |
| parent | d9b03f2d9b945805f56dfe3eb526264c68747d6f (diff) | |
Add dynamic layer for raspberrypi and rcar-gen3
Updates [v2]:
It backports the virtio-sound module for rcar-gen3 and enables
virtio-sound, virtio-can, virtio-input, virtio-console,
virtio-loopback for both cases.
Updates [v1]:
Add linux-renesas kernel configuration
Specifically this commit creates a new directory 'linux-renesas'
for configuring the required modules to be loaded by that kernel.
It is also backports the virtio-sound module and enables
virtio-sound, virtio-can, virtio-input, virtio-console and
virtio-loopback.
Virtio-sound module sources:
Source: https://lore.kernel.org/alsa-devel/20210302164709.3142702-1-anton.yakovlev@opensynergy.com
Bug-AGL: SPEC-4966
Change-Id: Ie143e690695a526958e07a66ba481887b2e4a248
Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
22 files changed, 4234 insertions, 0 deletions
diff --git a/meta-egvirt/conf/layer.conf b/meta-egvirt/conf/layer.conf index 1aea8992..a833e5d2 100644 --- a/meta-egvirt/conf/layer.conf +++ b/meta-egvirt/conf/layer.conf @@ -8,6 +8,11 @@ BBFILE_COLLECTIONS += "egvirt" BBFILE_PATTERN_egvirt = "^${LAYERDIR}/" BBFILE_PRIORITY_egvirt = "61" +BBFILES_DYNAMIC += " \ + rcar-gen3:${LAYERDIR}/dynamic-layers/rcar-gen3/*/*/*.bbappend \ + raspberrypi:${LAYERDIR}/dynamic-layers/raspberrypi/*/*/*.bbappend \ +" + # This should only be incremented on significant changes that will # cause compatibility issues with other layers LAYERVERSION_egvirt = "1" diff --git a/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/enable-virtio.cfg b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/enable-virtio.cfg new file mode 100644 index 00000000..82ff9ea1 --- /dev/null +++ b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/enable-virtio.cfg @@ -0,0 +1,6 @@ +CONFIG_VIRTIO=y +CONFIG_VIRTIO_MMIO=y +CONFIG_VIRTIO_BLK=y +CONFIG_VIRTIO_BLK_SCSI=y +CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_PCI_LEGACY=y diff --git a/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_can.cfg b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_can.cfg new file mode 100644 index 00000000..302e4ddb --- /dev/null +++ b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_can.cfg @@ -0,0 +1 @@ +CONFIG_CAN_DEV=m diff --git a/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_input.cfg b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_input.cfg new file mode 100644 index 00000000..55e65d1b --- /dev/null +++ b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_input.cfg @@ -0,0 +1,2 @@ +CONFIG_INPUT=y +CONFIG_INPUT_EVDEV=y diff --git a/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_loopback.cfg b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_loopback.cfg new file mode 100644 index 00000000..51c8a2d3 --- /dev/null +++ b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_loopback.cfg @@ -0,0 +1,7 @@ +CONFIG_HW_RANDOM_VIRTIO=m +CONFIG_VIRTIO_INPUT=m +CONFIG_VIRTIO_CAN=m +CONFIG_VIRTIO_GPIO=m +CONFIG_VIRTIO_CONSOLE=m +CONFIG_VIRTIO_BLK=m +CONFIG_SND_VIRTIO=m diff --git a/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_sound.cfg b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_sound.cfg new file mode 100644 index 00000000..2e9486e2 --- /dev/null +++ b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-common/virtio_sound.cfg @@ -0,0 +1,6 @@ +CONFIG_SND=y +CONFIG_SOUND=y +CONFIG_SND_TIMER=y +CONFIG_SND_PCM=y +CONFIG_SND_JACK=y +CONFIG_SND_JACK_INPUT_DEV=y diff --git a/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-raspberrypi_%.bbappend b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-raspberrypi_%.bbappend new file mode 100644 index 00000000..1de2965f --- /dev/null +++ b/meta-egvirt/dynamic-layers/raspberrypi/recipes-kernel/linux/linux-raspberrypi_%.bbappend @@ -0,0 +1,10 @@ + +FILESEXTRAPATHS:prepend := "${THISDIR}/linux-common/:" + +SRC_URI:append = " \ + file://enable-virtio.cfg \ + file://virtio_can.cfg \ + file://virtio_input.cfg \ + file://virtio_loopback.cfg \ + file://virtio_sound.cfg \ +" diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0001-ALSA-virtio-add-virtio-sound-driver.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0001-ALSA-virtio-add-virtio-sound-driver.patch new file mode 100644 index 00000000..46deaecb --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0001-ALSA-virtio-add-virtio-sound-driver.patch @@ -0,0 +1,851 @@ +From bfcf99b735c67cfe86d3074d318f4f2a22ee56a8 Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:02 +0100 +Subject: [PATCH 1/9] ALSA: virtio: add virtio sound driver + +Introduce skeleton of the virtio sound driver. The driver implements +the virtio sound device specification, which has become part of the +virtio standard. + +Initial initialization of the device, virtqueues and creation of an +empty ALSA sound device. + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-3-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + MAINTAINERS | 9 + + include/uapi/linux/virtio_snd.h | 334 ++++++++++++++++++++++++++++++++ + sound/Kconfig | 2 + + sound/Makefile | 3 +- + sound/virtio/Kconfig | 10 + + sound/virtio/Makefile | 7 + + sound/virtio/virtio_card.c | 324 +++++++++++++++++++++++++++++++ + sound/virtio/virtio_card.h | 65 +++++++ + 8 files changed, 753 insertions(+), 1 deletion(-) + create mode 100644 include/uapi/linux/virtio_snd.h + create mode 100644 sound/virtio/Kconfig + create mode 100644 sound/virtio/Makefile + create mode 100644 sound/virtio/virtio_card.c + create mode 100644 sound/virtio/virtio_card.h + +diff --git a/MAINTAINERS b/MAINTAINERS +index 4fef10dd2975..4e9cac18513e 100644 +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -18657,6 +18657,15 @@ W: https://virtio-mem.gitlab.io/ + F: drivers/virtio/virtio_mem.c + F: include/uapi/linux/virtio_mem.h + ++VIRTIO SOUND DRIVER ++M: Anton Yakovlev <anton.yakovlev@opensynergy.com> ++M: "Michael S. Tsirkin" <mst@redhat.com> ++L: virtualization@lists.linux-foundation.org ++L: alsa-devel@alsa-project.org (moderated for non-subscribers) ++S: Maintained ++F: include/uapi/linux/virtio_snd.h ++F: sound/virtio/* ++ + VIRTUAL BOX GUEST DEVICE DRIVER + M: Hans de Goede <hdegoede@redhat.com> + M: Arnd Bergmann <arnd@arndb.de> +diff --git a/include/uapi/linux/virtio_snd.h b/include/uapi/linux/virtio_snd.h +new file mode 100644 +index 000000000000..dfe49547a7b0 +--- /dev/null ++++ b/include/uapi/linux/virtio_snd.h +@@ -0,0 +1,334 @@ ++/* SPDX-License-Identifier: BSD-3-Clause */ ++/* ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#ifndef VIRTIO_SND_IF_H ++#define VIRTIO_SND_IF_H ++ ++#include <linux/virtio_types.h> ++ ++/******************************************************************************* ++ * CONFIGURATION SPACE ++ */ ++struct virtio_snd_config { ++ /* # of available physical jacks */ ++ __le32 jacks; ++ /* # of available PCM streams */ ++ __le32 streams; ++ /* # of available channel maps */ ++ __le32 chmaps; ++}; ++ ++enum { ++ /* device virtqueue indexes */ ++ VIRTIO_SND_VQ_CONTROL = 0, ++ VIRTIO_SND_VQ_EVENT, ++ VIRTIO_SND_VQ_TX, ++ VIRTIO_SND_VQ_RX, ++ /* # of device virtqueues */ ++ VIRTIO_SND_VQ_MAX ++}; ++ ++/******************************************************************************* ++ * COMMON DEFINITIONS ++ */ ++ ++/* supported dataflow directions */ ++enum { ++ VIRTIO_SND_D_OUTPUT = 0, ++ VIRTIO_SND_D_INPUT ++}; ++ ++enum { ++ /* jack control request types */ ++ VIRTIO_SND_R_JACK_INFO = 1, ++ VIRTIO_SND_R_JACK_REMAP, ++ ++ /* PCM control request types */ ++ VIRTIO_SND_R_PCM_INFO = 0x0100, ++ VIRTIO_SND_R_PCM_SET_PARAMS, ++ VIRTIO_SND_R_PCM_PREPARE, ++ VIRTIO_SND_R_PCM_RELEASE, ++ VIRTIO_SND_R_PCM_START, ++ VIRTIO_SND_R_PCM_STOP, ++ ++ /* channel map control request types */ ++ VIRTIO_SND_R_CHMAP_INFO = 0x0200, ++ ++ /* jack event types */ ++ VIRTIO_SND_EVT_JACK_CONNECTED = 0x1000, ++ VIRTIO_SND_EVT_JACK_DISCONNECTED, ++ ++ /* PCM event types */ ++ VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED = 0x1100, ++ VIRTIO_SND_EVT_PCM_XRUN, ++ ++ /* common status codes */ ++ VIRTIO_SND_S_OK = 0x8000, ++ VIRTIO_SND_S_BAD_MSG, ++ VIRTIO_SND_S_NOT_SUPP, ++ VIRTIO_SND_S_IO_ERR ++}; ++ ++/* common header */ ++struct virtio_snd_hdr { ++ __le32 code; ++}; ++ ++/* event notification */ ++struct virtio_snd_event { ++ /* VIRTIO_SND_EVT_XXX */ ++ struct virtio_snd_hdr hdr; ++ /* optional event data */ ++ __le32 data; ++}; ++ ++/* common control request to query an item information */ ++struct virtio_snd_query_info { ++ /* VIRTIO_SND_R_XXX_INFO */ ++ struct virtio_snd_hdr hdr; ++ /* item start identifier */ ++ __le32 start_id; ++ /* item count to query */ ++ __le32 count; ++ /* item information size in bytes */ ++ __le32 size; ++}; ++ ++/* common item information header */ ++struct virtio_snd_info { ++ /* function group node id (High Definition Audio Specification 7.1.2) */ ++ __le32 hda_fn_nid; ++}; ++ ++/******************************************************************************* ++ * JACK CONTROL MESSAGES ++ */ ++struct virtio_snd_jack_hdr { ++ /* VIRTIO_SND_R_JACK_XXX */ ++ struct virtio_snd_hdr hdr; ++ /* 0 ... virtio_snd_config::jacks - 1 */ ++ __le32 jack_id; ++}; ++ ++/* supported jack features */ ++enum { ++ VIRTIO_SND_JACK_F_REMAP = 0 ++}; ++ ++struct virtio_snd_jack_info { ++ /* common header */ ++ struct virtio_snd_info hdr; ++ /* supported feature bit map (1 << VIRTIO_SND_JACK_F_XXX) */ ++ __le32 features; ++ /* pin configuration (High Definition Audio Specification 7.3.3.31) */ ++ __le32 hda_reg_defconf; ++ /* pin capabilities (High Definition Audio Specification 7.3.4.9) */ ++ __le32 hda_reg_caps; ++ /* current jack connection status (0: disconnected, 1: connected) */ ++ __u8 connected; ++ ++ __u8 padding[7]; ++}; ++ ++/* jack remapping control request */ ++struct virtio_snd_jack_remap { ++ /* .code = VIRTIO_SND_R_JACK_REMAP */ ++ struct virtio_snd_jack_hdr hdr; ++ /* selected association number */ ++ __le32 association; ++ /* selected sequence number */ ++ __le32 sequence; ++}; ++ ++/******************************************************************************* ++ * PCM CONTROL MESSAGES ++ */ ++struct virtio_snd_pcm_hdr { ++ /* VIRTIO_SND_R_PCM_XXX */ ++ struct virtio_snd_hdr hdr; ++ /* 0 ... virtio_snd_config::streams - 1 */ ++ __le32 stream_id; ++}; ++ ++/* supported PCM stream features */ ++enum { ++ VIRTIO_SND_PCM_F_SHMEM_HOST = 0, ++ VIRTIO_SND_PCM_F_SHMEM_GUEST, ++ VIRTIO_SND_PCM_F_MSG_POLLING, ++ VIRTIO_SND_PCM_F_EVT_SHMEM_PERIODS, ++ VIRTIO_SND_PCM_F_EVT_XRUNS ++}; ++ ++/* supported PCM sample formats */ ++enum { ++ /* analog formats (width / physical width) */ ++ VIRTIO_SND_PCM_FMT_IMA_ADPCM = 0, /* 4 / 4 bits */ ++ VIRTIO_SND_PCM_FMT_MU_LAW, /* 8 / 8 bits */ ++ VIRTIO_SND_PCM_FMT_A_LAW, /* 8 / 8 bits */ ++ VIRTIO_SND_PCM_FMT_S8, /* 8 / 8 bits */ ++ VIRTIO_SND_PCM_FMT_U8, /* 8 / 8 bits */ ++ VIRTIO_SND_PCM_FMT_S16, /* 16 / 16 bits */ ++ VIRTIO_SND_PCM_FMT_U16, /* 16 / 16 bits */ ++ VIRTIO_SND_PCM_FMT_S18_3, /* 18 / 24 bits */ ++ VIRTIO_SND_PCM_FMT_U18_3, /* 18 / 24 bits */ ++ VIRTIO_SND_PCM_FMT_S20_3, /* 20 / 24 bits */ ++ VIRTIO_SND_PCM_FMT_U20_3, /* 20 / 24 bits */ ++ VIRTIO_SND_PCM_FMT_S24_3, /* 24 / 24 bits */ ++ VIRTIO_SND_PCM_FMT_U24_3, /* 24 / 24 bits */ ++ VIRTIO_SND_PCM_FMT_S20, /* 20 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_U20, /* 20 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_S24, /* 24 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_U24, /* 24 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_S32, /* 32 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_U32, /* 32 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_FLOAT, /* 32 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_FLOAT64, /* 64 / 64 bits */ ++ /* digital formats (width / physical width) */ ++ VIRTIO_SND_PCM_FMT_DSD_U8, /* 8 / 8 bits */ ++ VIRTIO_SND_PCM_FMT_DSD_U16, /* 16 / 16 bits */ ++ VIRTIO_SND_PCM_FMT_DSD_U32, /* 32 / 32 bits */ ++ VIRTIO_SND_PCM_FMT_IEC958_SUBFRAME /* 32 / 32 bits */ ++}; ++ ++/* supported PCM frame rates */ ++enum { ++ VIRTIO_SND_PCM_RATE_5512 = 0, ++ VIRTIO_SND_PCM_RATE_8000, ++ VIRTIO_SND_PCM_RATE_11025, ++ VIRTIO_SND_PCM_RATE_16000, ++ VIRTIO_SND_PCM_RATE_22050, ++ VIRTIO_SND_PCM_RATE_32000, ++ VIRTIO_SND_PCM_RATE_44100, ++ VIRTIO_SND_PCM_RATE_48000, ++ VIRTIO_SND_PCM_RATE_64000, ++ VIRTIO_SND_PCM_RATE_88200, ++ VIRTIO_SND_PCM_RATE_96000, ++ VIRTIO_SND_PCM_RATE_176400, ++ VIRTIO_SND_PCM_RATE_192000, ++ VIRTIO_SND_PCM_RATE_384000 ++}; ++ ++struct virtio_snd_pcm_info { ++ /* common header */ ++ struct virtio_snd_info hdr; ++ /* supported feature bit map (1 << VIRTIO_SND_PCM_F_XXX) */ ++ __le32 features; ++ /* supported sample format bit map (1 << VIRTIO_SND_PCM_FMT_XXX) */ ++ __le64 formats; ++ /* supported frame rate bit map (1 << VIRTIO_SND_PCM_RATE_XXX) */ ++ __le64 rates; ++ /* dataflow direction (VIRTIO_SND_D_XXX) */ ++ __u8 direction; ++ /* minimum # of supported channels */ ++ __u8 channels_min; ++ /* maximum # of supported channels */ ++ __u8 channels_max; ++ ++ __u8 padding[5]; ++}; ++ ++/* set PCM stream format */ ++struct virtio_snd_pcm_set_params { ++ /* .code = VIRTIO_SND_R_PCM_SET_PARAMS */ ++ struct virtio_snd_pcm_hdr hdr; ++ /* size of the hardware buffer */ ++ __le32 buffer_bytes; ++ /* size of the hardware period */ ++ __le32 period_bytes; ++ /* selected feature bit map (1 << VIRTIO_SND_PCM_F_XXX) */ ++ __le32 features; ++ /* selected # of channels */ ++ __u8 channels; ++ /* selected sample format (VIRTIO_SND_PCM_FMT_XXX) */ ++ __u8 format; ++ /* selected frame rate (VIRTIO_SND_PCM_RATE_XXX) */ ++ __u8 rate; ++ ++ __u8 padding; ++}; ++ ++/******************************************************************************* ++ * PCM I/O MESSAGES ++ */ ++ ++/* I/O request header */ ++struct virtio_snd_pcm_xfer { ++ /* 0 ... virtio_snd_config::streams - 1 */ ++ __le32 stream_id; ++}; ++ ++/* I/O request status */ ++struct virtio_snd_pcm_status { ++ /* VIRTIO_SND_S_XXX */ ++ __le32 status; ++ /* current device latency */ ++ __le32 latency_bytes; ++}; ++ ++/******************************************************************************* ++ * CHANNEL MAP CONTROL MESSAGES ++ */ ++struct virtio_snd_chmap_hdr { ++ /* VIRTIO_SND_R_CHMAP_XXX */ ++ struct virtio_snd_hdr hdr; ++ /* 0 ... virtio_snd_config::chmaps - 1 */ ++ __le32 chmap_id; ++}; ++ ++/* standard channel position definition */ ++enum { ++ VIRTIO_SND_CHMAP_NONE = 0, /* undefined */ ++ VIRTIO_SND_CHMAP_NA, /* silent */ ++ VIRTIO_SND_CHMAP_MONO, /* mono stream */ ++ VIRTIO_SND_CHMAP_FL, /* front left */ ++ VIRTIO_SND_CHMAP_FR, /* front right */ ++ VIRTIO_SND_CHMAP_RL, /* rear left */ ++ VIRTIO_SND_CHMAP_RR, /* rear right */ ++ VIRTIO_SND_CHMAP_FC, /* front center */ ++ VIRTIO_SND_CHMAP_LFE, /* low frequency (LFE) */ ++ VIRTIO_SND_CHMAP_SL, /* side left */ ++ VIRTIO_SND_CHMAP_SR, /* side right */ ++ VIRTIO_SND_CHMAP_RC, /* rear center */ ++ VIRTIO_SND_CHMAP_FLC, /* front left center */ ++ VIRTIO_SND_CHMAP_FRC, /* front right center */ ++ VIRTIO_SND_CHMAP_RLC, /* rear left center */ ++ VIRTIO_SND_CHMAP_RRC, /* rear right center */ ++ VIRTIO_SND_CHMAP_FLW, /* front left wide */ ++ VIRTIO_SND_CHMAP_FRW, /* front right wide */ ++ VIRTIO_SND_CHMAP_FLH, /* front left high */ ++ VIRTIO_SND_CHMAP_FCH, /* front center high */ ++ VIRTIO_SND_CHMAP_FRH, /* front right high */ ++ VIRTIO_SND_CHMAP_TC, /* top center */ ++ VIRTIO_SND_CHMAP_TFL, /* top front left */ ++ VIRTIO_SND_CHMAP_TFR, /* top front right */ ++ VIRTIO_SND_CHMAP_TFC, /* top front center */ ++ VIRTIO_SND_CHMAP_TRL, /* top rear left */ ++ VIRTIO_SND_CHMAP_TRR, /* top rear right */ ++ VIRTIO_SND_CHMAP_TRC, /* top rear center */ ++ VIRTIO_SND_CHMAP_TFLC, /* top front left center */ ++ VIRTIO_SND_CHMAP_TFRC, /* top front right center */ ++ VIRTIO_SND_CHMAP_TSL, /* top side left */ ++ VIRTIO_SND_CHMAP_TSR, /* top side right */ ++ VIRTIO_SND_CHMAP_LLFE, /* left LFE */ ++ VIRTIO_SND_CHMAP_RLFE, /* right LFE */ ++ VIRTIO_SND_CHMAP_BC, /* bottom center */ ++ VIRTIO_SND_CHMAP_BLC, /* bottom left center */ ++ VIRTIO_SND_CHMAP_BRC /* bottom right center */ ++}; ++ ++/* maximum possible number of channels */ ++#define VIRTIO_SND_CHMAP_MAX_SIZE 18 ++ ++struct virtio_snd_chmap_info { ++ /* common header */ ++ struct virtio_snd_info hdr; ++ /* dataflow direction (VIRTIO_SND_D_XXX) */ ++ __u8 direction; ++ /* # of valid channel position values */ ++ __u8 channels; ++ /* channel position values (VIRTIO_SND_CHMAP_XXX) */ ++ __u8 positions[VIRTIO_SND_CHMAP_MAX_SIZE]; ++}; ++ ++#endif /* VIRTIO_SND_IF_H */ +diff --git a/sound/Kconfig b/sound/Kconfig +index 36785410fbe1..e56d96d2b11c 100644 +--- a/sound/Kconfig ++++ b/sound/Kconfig +@@ -99,6 +99,8 @@ source "sound/synth/Kconfig" + + source "sound/xen/Kconfig" + ++source "sound/virtio/Kconfig" ++ + endif # SND + + endif # !UML +diff --git a/sound/Makefile b/sound/Makefile +index 797ecdcd35e2..04ef04b1168f 100644 +--- a/sound/Makefile ++++ b/sound/Makefile +@@ -5,7 +5,8 @@ + obj-$(CONFIG_SOUND) += soundcore.o + obj-$(CONFIG_DMASOUND) += oss/dmasound/ + obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \ +- firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/ x86/ xen/ ++ firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/ x86/ xen/ \ ++ virtio/ + obj-$(CONFIG_SND_AOA) += aoa/ + + # This one must be compilable even if sound is configured out +diff --git a/sound/virtio/Kconfig b/sound/virtio/Kconfig +new file mode 100644 +index 000000000000..094cba24ee5b +--- /dev/null ++++ b/sound/virtio/Kconfig +@@ -0,0 +1,10 @@ ++# SPDX-License-Identifier: GPL-2.0+ ++# Sound card driver for virtio ++ ++config SND_VIRTIO ++ tristate "Virtio sound driver" ++ depends on VIRTIO ++ select SND_PCM ++ select SND_JACK ++ help ++ This is the virtual sound driver for virtio. Say Y or M. +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +new file mode 100644 +index 000000000000..8c87ebb9982b +--- /dev/null ++++ b/sound/virtio/Makefile +@@ -0,0 +1,7 @@ ++# SPDX-License-Identifier: GPL-2.0+ ++ ++obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o ++ ++virtio_snd-objs := \ ++ virtio_card.o ++ +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +new file mode 100644 +index 000000000000..5a37056858e9 +--- /dev/null ++++ b/sound/virtio/virtio_card.c +@@ -0,0 +1,324 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/virtio_config.h> ++#include <sound/initval.h> ++#include <uapi/linux/virtio_ids.h> ++ ++#include "virtio_card.h" ++ ++static void virtsnd_remove(struct virtio_device *vdev); ++ ++/** ++ * virtsnd_event_send() - Add an event to the event queue. ++ * @vqueue: Underlying event virtqueue. ++ * @event: Event. ++ * @notify: Indicates whether or not to send a notification to the device. ++ * @gfp: Kernel flags for memory allocation. ++ * ++ * Context: Any context. ++ */ ++static void virtsnd_event_send(struct virtqueue *vqueue, ++ struct virtio_snd_event *event, bool notify, ++ gfp_t gfp) ++{ ++ struct scatterlist sg; ++ struct scatterlist *psgs[1] = { &sg }; ++ ++ /* reset event content */ ++ memset(event, 0, sizeof(*event)); ++ ++ sg_init_one(&sg, event, sizeof(*event)); ++ ++ if (virtqueue_add_sgs(vqueue, psgs, 0, 1, event, gfp) || !notify) ++ return; ++ ++ if (virtqueue_kick_prepare(vqueue)) ++ virtqueue_notify(vqueue); ++} ++ ++/** ++ * virtsnd_event_dispatch() - Dispatch an event from the device side. ++ * @snd: VirtIO sound device. ++ * @event: VirtIO sound event. ++ * ++ * Context: Any context. ++ */ ++static void virtsnd_event_dispatch(struct virtio_snd *snd, ++ struct virtio_snd_event *event) ++{ ++} ++ ++/** ++ * virtsnd_event_notify_cb() - Dispatch all reported events from the event queue. ++ * @vqueue: Underlying event virtqueue. ++ * ++ * This callback function is called upon a vring interrupt request from the ++ * device. ++ * ++ * Context: Interrupt context. ++ */ ++static void virtsnd_event_notify_cb(struct virtqueue *vqueue) ++{ ++ struct virtio_snd *snd = vqueue->vdev->priv; ++ struct virtio_snd_queue *queue = virtsnd_event_queue(snd); ++ struct virtio_snd_event *event; ++ u32 length; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&queue->lock, flags); ++ do { ++ virtqueue_disable_cb(vqueue); ++ while ((event = virtqueue_get_buf(vqueue, &length))) { ++ virtsnd_event_dispatch(snd, event); ++ virtsnd_event_send(vqueue, event, true, GFP_ATOMIC); ++ } ++ if (unlikely(virtqueue_is_broken(vqueue))) ++ break; ++ } while (!virtqueue_enable_cb(vqueue)); ++ spin_unlock_irqrestore(&queue->lock, flags); ++} ++ ++/** ++ * virtsnd_find_vqs() - Enumerate and initialize all virtqueues. ++ * @snd: VirtIO sound device. ++ * ++ * After calling this function, the event queue is disabled. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_find_vqs(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ static vq_callback_t *callbacks[VIRTIO_SND_VQ_MAX] = { ++ [VIRTIO_SND_VQ_EVENT] = virtsnd_event_notify_cb ++ }; ++ static const char *names[VIRTIO_SND_VQ_MAX] = { ++ [VIRTIO_SND_VQ_EVENT] = "virtsnd-event" ++ }; ++ struct virtqueue *vqs[VIRTIO_SND_VQ_MAX] = { 0 }; ++ unsigned int i; ++ unsigned int n; ++ int rc; ++ ++ rc = virtio_find_vqs(vdev, VIRTIO_SND_VQ_MAX, vqs, callbacks, names, ++ NULL); ++ if (rc) { ++ dev_err(&vdev->dev, "failed to initialize virtqueues\n"); ++ return rc; ++ } ++ ++ for (i = 0; i < VIRTIO_SND_VQ_MAX; ++i) ++ snd->queues[i].vqueue = vqs[i]; ++ ++ /* Allocate events and populate the event queue */ ++ virtqueue_disable_cb(vqs[VIRTIO_SND_VQ_EVENT]); ++ ++ n = virtqueue_get_vring_size(vqs[VIRTIO_SND_VQ_EVENT]); ++ ++ snd->event_msgs = kmalloc_array(n, sizeof(*snd->event_msgs), ++ GFP_KERNEL); ++ if (!snd->event_msgs) ++ return -ENOMEM; ++ ++ for (i = 0; i < n; ++i) ++ virtsnd_event_send(vqs[VIRTIO_SND_VQ_EVENT], ++ &snd->event_msgs[i], false, GFP_KERNEL); ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_enable_event_vq() - Enable the event virtqueue. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context. ++ */ ++static void virtsnd_enable_event_vq(struct virtio_snd *snd) ++{ ++ struct virtio_snd_queue *queue = virtsnd_event_queue(snd); ++ ++ if (!virtqueue_enable_cb(queue->vqueue)) ++ virtsnd_event_notify_cb(queue->vqueue); ++} ++ ++/** ++ * virtsnd_disable_event_vq() - Disable the event virtqueue. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context. ++ */ ++static void virtsnd_disable_event_vq(struct virtio_snd *snd) ++{ ++ struct virtio_snd_queue *queue = virtsnd_event_queue(snd); ++ struct virtio_snd_event *event; ++ u32 length; ++ unsigned long flags; ++ ++ if (queue->vqueue) { ++ spin_lock_irqsave(&queue->lock, flags); ++ virtqueue_disable_cb(queue->vqueue); ++ while ((event = virtqueue_get_buf(queue->vqueue, &length))) ++ virtsnd_event_dispatch(snd, event); ++ spin_unlock_irqrestore(&queue->lock, flags); ++ } ++} ++ ++/** ++ * virtsnd_build_devs() - Read configuration and build ALSA devices. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_build_devs(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct device *dev = &vdev->dev; ++ int rc; ++ ++ rc = snd_card_new(dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, ++ THIS_MODULE, 0, &snd->card); ++ if (rc < 0) ++ return rc; ++ ++ snd->card->private_data = snd; ++ ++ strscpy(snd->card->driver, VIRTIO_SND_CARD_DRIVER, ++ sizeof(snd->card->driver)); ++ strscpy(snd->card->shortname, VIRTIO_SND_CARD_NAME, ++ sizeof(snd->card->shortname)); ++ if (dev->parent->bus) ++ snprintf(snd->card->longname, sizeof(snd->card->longname), ++ VIRTIO_SND_CARD_NAME " at %s/%s/%s", ++ dev->parent->bus->name, dev_name(dev->parent), ++ dev_name(dev)); ++ else ++ snprintf(snd->card->longname, sizeof(snd->card->longname), ++ VIRTIO_SND_CARD_NAME " at %s/%s", ++ dev_name(dev->parent), dev_name(dev)); ++ ++ return snd_card_register(snd->card); ++} ++ ++/** ++ * virtsnd_validate() - Validate if the device can be started. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -EINVAL on failure. ++ */ ++static int virtsnd_validate(struct virtio_device *vdev) ++{ ++ if (!vdev->config->get) { ++ dev_err(&vdev->dev, "configuration access disabled\n"); ++ return -EINVAL; ++ } ++ ++ if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) { ++ dev_err(&vdev->dev, ++ "device does not comply with spec version 1.x\n"); ++ return -EINVAL; ++ } ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_probe() - Create and initialize the device. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_probe(struct virtio_device *vdev) ++{ ++ struct virtio_snd *snd; ++ unsigned int i; ++ int rc; ++ ++ snd = devm_kzalloc(&vdev->dev, sizeof(*snd), GFP_KERNEL); ++ if (!snd) ++ return -ENOMEM; ++ ++ snd->vdev = vdev; ++ ++ vdev->priv = snd; ++ ++ for (i = 0; i < VIRTIO_SND_VQ_MAX; ++i) ++ spin_lock_init(&snd->queues[i].lock); ++ ++ rc = virtsnd_find_vqs(snd); ++ if (rc) ++ goto on_exit; ++ ++ virtio_device_ready(vdev); ++ ++ rc = virtsnd_build_devs(snd); ++ if (rc) ++ goto on_exit; ++ ++ virtsnd_enable_event_vq(snd); ++ ++on_exit: ++ if (rc) ++ virtsnd_remove(vdev); ++ ++ return rc; ++} ++ ++/** ++ * virtsnd_remove() - Remove VirtIO and ALSA devices. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context that permits to sleep. ++ */ ++static void virtsnd_remove(struct virtio_device *vdev) ++{ ++ struct virtio_snd *snd = vdev->priv; ++ ++ virtsnd_disable_event_vq(snd); ++ ++ if (snd->card) ++ snd_card_free(snd->card); ++ ++ vdev->config->del_vqs(vdev); ++ vdev->config->reset(vdev); ++ ++ kfree(snd->event_msgs); ++} ++ ++static const struct virtio_device_id id_table[] = { ++ { VIRTIO_ID_SOUND, VIRTIO_DEV_ANY_ID }, ++ { 0 }, ++}; ++ ++static struct virtio_driver virtsnd_driver = { ++ .driver.name = KBUILD_MODNAME, ++ .driver.owner = THIS_MODULE, ++ .id_table = id_table, ++ .validate = virtsnd_validate, ++ .probe = virtsnd_probe, ++ .remove = virtsnd_remove, ++}; ++ ++static int __init init(void) ++{ ++ return register_virtio_driver(&virtsnd_driver); ++} ++module_init(init); ++ ++static void __exit fini(void) ++{ ++ unregister_virtio_driver(&virtsnd_driver); ++} ++module_exit(fini); ++ ++MODULE_DEVICE_TABLE(virtio, id_table); ++MODULE_DESCRIPTION("Virtio sound card driver"); ++MODULE_LICENSE("GPL"); +diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h +new file mode 100644 +index 000000000000..b903b1b12e90 +--- /dev/null ++++ b/sound/virtio/virtio_card.h +@@ -0,0 +1,65 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#ifndef VIRTIO_SND_CARD_H ++#define VIRTIO_SND_CARD_H ++ ++#include <linux/slab.h> ++#include <linux/virtio.h> ++#include <sound/core.h> ++#include <uapi/linux/virtio_snd.h> ++ ++#define VIRTIO_SND_CARD_DRIVER "virtio-snd" ++#define VIRTIO_SND_CARD_NAME "VirtIO SoundCard" ++ ++/** ++ * struct virtio_snd_queue - Virtqueue wrapper structure. ++ * @lock: Used to synchronize access to a virtqueue. ++ * @vqueue: Underlying virtqueue. ++ */ ++struct virtio_snd_queue { ++ spinlock_t lock; ++ struct virtqueue *vqueue; ++}; ++ ++/** ++ * struct virtio_snd - VirtIO sound card device. ++ * @vdev: Underlying virtio device. ++ * @queues: Virtqueue wrappers. ++ * @card: ALSA sound card. ++ * @event_msgs: Device events. ++ */ ++struct virtio_snd { ++ struct virtio_device *vdev; ++ struct virtio_snd_queue queues[VIRTIO_SND_VQ_MAX]; ++ struct snd_card *card; ++ struct virtio_snd_event *event_msgs; ++}; ++ ++static inline struct virtio_snd_queue * ++virtsnd_control_queue(struct virtio_snd *snd) ++{ ++ return &snd->queues[VIRTIO_SND_VQ_CONTROL]; ++} ++ ++static inline struct virtio_snd_queue * ++virtsnd_event_queue(struct virtio_snd *snd) ++{ ++ return &snd->queues[VIRTIO_SND_VQ_EVENT]; ++} ++ ++static inline struct virtio_snd_queue * ++virtsnd_tx_queue(struct virtio_snd *snd) ++{ ++ return &snd->queues[VIRTIO_SND_VQ_TX]; ++} ++ ++static inline struct virtio_snd_queue * ++virtsnd_rx_queue(struct virtio_snd *snd) ++{ ++ return &snd->queues[VIRTIO_SND_VQ_RX]; ++} ++ ++#endif /* VIRTIO_SND_CARD_H */ +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0002-ALSA-virtio-handling-control-messages.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0002-ALSA-virtio-handling-control-messages.patch new file mode 100644 index 00000000..a5e8a65d --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0002-ALSA-virtio-handling-control-messages.patch @@ -0,0 +1,530 @@ +From de4d20acac58f2aa04539a611540e3f1589f1d3a Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:03 +0100 +Subject: [PATCH 2/9] ALSA: virtio: handling control messages + +The control queue can be used by different parts of the driver to send +commands to the device. Control messages can be either synchronous or +asynchronous. The lifetime of a message is controlled by a reference +count. + +Introduce a module parameter to set the message completion timeout: + msg_timeout_ms [=1000] + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-4-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/Makefile | 3 +- + sound/virtio/virtio_card.c | 13 ++ + sound/virtio/virtio_card.h | 7 + + sound/virtio/virtio_ctl_msg.c | 310 ++++++++++++++++++++++++++++++++++ + sound/virtio/virtio_ctl_msg.h | 78 +++++++++ + 5 files changed, 410 insertions(+), 1 deletion(-) + create mode 100644 sound/virtio/virtio_ctl_msg.c + create mode 100644 sound/virtio/virtio_ctl_msg.h + +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +index 8c87ebb9982b..dc551e637441 100644 +--- a/sound/virtio/Makefile ++++ b/sound/virtio/Makefile +@@ -3,5 +3,6 @@ + obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o + + virtio_snd-objs := \ +- virtio_card.o ++ virtio_card.o \ ++ virtio_ctl_msg.o + +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index 5a37056858e9..b757b2444078 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -11,6 +11,10 @@ + + #include "virtio_card.h" + ++u32 virtsnd_msg_timeout_ms = MSEC_PER_SEC; ++module_param_named(msg_timeout_ms, virtsnd_msg_timeout_ms, uint, 0644); ++MODULE_PARM_DESC(msg_timeout_ms, "Message completion timeout in milliseconds"); ++ + static void virtsnd_remove(struct virtio_device *vdev); + + /** +@@ -96,9 +100,11 @@ static int virtsnd_find_vqs(struct virtio_snd *snd) + { + struct virtio_device *vdev = snd->vdev; + static vq_callback_t *callbacks[VIRTIO_SND_VQ_MAX] = { ++ [VIRTIO_SND_VQ_CONTROL] = virtsnd_ctl_notify_cb, + [VIRTIO_SND_VQ_EVENT] = virtsnd_event_notify_cb + }; + static const char *names[VIRTIO_SND_VQ_MAX] = { ++ [VIRTIO_SND_VQ_CONTROL] = "virtsnd-ctl", + [VIRTIO_SND_VQ_EVENT] = "virtsnd-event" + }; + struct virtqueue *vqs[VIRTIO_SND_VQ_MAX] = { 0 }; +@@ -226,6 +232,11 @@ static int virtsnd_validate(struct virtio_device *vdev) + return -EINVAL; + } + ++ if (!virtsnd_msg_timeout_ms) { ++ dev_err(&vdev->dev, "msg_timeout_ms value cannot be zero\n"); ++ return -EINVAL; ++ } ++ + return 0; + } + +@@ -247,6 +258,7 @@ static int virtsnd_probe(struct virtio_device *vdev) + return -ENOMEM; + + snd->vdev = vdev; ++ INIT_LIST_HEAD(&snd->ctl_msgs); + + vdev->priv = snd; + +@@ -283,6 +295,7 @@ static void virtsnd_remove(struct virtio_device *vdev) + struct virtio_snd *snd = vdev->priv; + + virtsnd_disable_event_vq(snd); ++ virtsnd_ctl_msg_cancel_all(snd); + + if (snd->card) + snd_card_free(snd->card); +diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h +index b903b1b12e90..1e76eeff160f 100644 +--- a/sound/virtio/virtio_card.h ++++ b/sound/virtio/virtio_card.h +@@ -11,6 +11,8 @@ + #include <sound/core.h> + #include <uapi/linux/virtio_snd.h> + ++#include "virtio_ctl_msg.h" ++ + #define VIRTIO_SND_CARD_DRIVER "virtio-snd" + #define VIRTIO_SND_CARD_NAME "VirtIO SoundCard" + +@@ -29,15 +31,20 @@ struct virtio_snd_queue { + * @vdev: Underlying virtio device. + * @queues: Virtqueue wrappers. + * @card: ALSA sound card. ++ * @ctl_msgs: Pending control request list. + * @event_msgs: Device events. + */ + struct virtio_snd { + struct virtio_device *vdev; + struct virtio_snd_queue queues[VIRTIO_SND_VQ_MAX]; + struct snd_card *card; ++ struct list_head ctl_msgs; + struct virtio_snd_event *event_msgs; + }; + ++/* Message completion timeout in milliseconds (module parameter). */ ++extern u32 virtsnd_msg_timeout_ms; ++ + static inline struct virtio_snd_queue * + virtsnd_control_queue(struct virtio_snd *snd) + { +diff --git a/sound/virtio/virtio_ctl_msg.c b/sound/virtio/virtio_ctl_msg.c +new file mode 100644 +index 000000000000..26ff7e7cc041 +--- /dev/null ++++ b/sound/virtio/virtio_ctl_msg.c +@@ -0,0 +1,310 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <linux/moduleparam.h> ++#include <linux/virtio_config.h> ++ ++#include "virtio_card.h" ++ ++/** ++ * struct virtio_snd_msg - Control message. ++ * @sg_request: Scattergather list containing a device request (header). ++ * @sg_response: Scattergather list containing a device response (status). ++ * @list: Pending message list entry. ++ * @notify: Request completed notification. ++ * @ref_count: Reference count used to manage a message lifetime. ++ */ ++struct virtio_snd_msg { ++ struct scatterlist sg_request; ++ struct scatterlist sg_response; ++ struct list_head list; ++ struct completion notify; ++ refcount_t ref_count; ++}; ++ ++/** ++ * virtsnd_ctl_msg_ref() - Increment reference counter for the message. ++ * @msg: Control message. ++ * ++ * Context: Any context. ++ */ ++void virtsnd_ctl_msg_ref(struct virtio_snd_msg *msg) ++{ ++ refcount_inc(&msg->ref_count); ++} ++ ++/** ++ * virtsnd_ctl_msg_unref() - Decrement reference counter for the message. ++ * @msg: Control message. ++ * ++ * The message will be freed when the ref_count value is 0. ++ * ++ * Context: Any context. ++ */ ++void virtsnd_ctl_msg_unref(struct virtio_snd_msg *msg) ++{ ++ if (refcount_dec_and_test(&msg->ref_count)) ++ kfree(msg); ++} ++ ++/** ++ * virtsnd_ctl_msg_request() - Get a pointer to the request header. ++ * @msg: Control message. ++ * ++ * Context: Any context. ++ */ ++void *virtsnd_ctl_msg_request(struct virtio_snd_msg *msg) ++{ ++ return sg_virt(&msg->sg_request); ++} ++ ++/** ++ * virtsnd_ctl_msg_request() - Get a pointer to the response header. ++ * @msg: Control message. ++ * ++ * Context: Any context. ++ */ ++void *virtsnd_ctl_msg_response(struct virtio_snd_msg *msg) ++{ ++ return sg_virt(&msg->sg_response); ++} ++ ++/** ++ * virtsnd_ctl_msg_alloc() - Allocate and initialize a control message. ++ * @request_size: Size of request header. ++ * @response_size: Size of response header. ++ * @gfp: Kernel flags for memory allocation. ++ * ++ * The message will be automatically freed when the ref_count value is 0. ++ * ++ * Context: Any context. May sleep if @gfp flags permit. ++ * Return: Allocated message on success, NULL on failure. ++ */ ++struct virtio_snd_msg *virtsnd_ctl_msg_alloc(size_t request_size, ++ size_t response_size, gfp_t gfp) ++{ ++ struct virtio_snd_msg *msg; ++ ++ if (!request_size || !response_size) ++ return NULL; ++ ++ msg = kzalloc(sizeof(*msg) + request_size + response_size, gfp); ++ if (!msg) ++ return NULL; ++ ++ sg_init_one(&msg->sg_request, (u8 *)msg + sizeof(*msg), request_size); ++ sg_init_one(&msg->sg_response, (u8 *)msg + sizeof(*msg) + request_size, ++ response_size); ++ ++ INIT_LIST_HEAD(&msg->list); ++ init_completion(&msg->notify); ++ /* This reference is dropped in virtsnd_ctl_msg_complete(). */ ++ refcount_set(&msg->ref_count, 1); ++ ++ return msg; ++} ++ ++/** ++ * virtsnd_ctl_msg_send() - Send a control message. ++ * @snd: VirtIO sound device. ++ * @msg: Control message. ++ * @out_sgs: Additional sg-list to attach to the request header (may be NULL). ++ * @in_sgs: Additional sg-list to attach to the response header (may be NULL). ++ * @nowait: Flag indicating whether to wait for completion. ++ * ++ * Context: Any context. Takes and releases the control queue spinlock. ++ * May sleep if @nowait is false. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_ctl_msg_send(struct virtio_snd *snd, struct virtio_snd_msg *msg, ++ struct scatterlist *out_sgs, ++ struct scatterlist *in_sgs, bool nowait) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct virtio_snd_queue *queue = virtsnd_control_queue(snd); ++ unsigned int js = msecs_to_jiffies(virtsnd_msg_timeout_ms); ++ struct virtio_snd_hdr *request = virtsnd_ctl_msg_request(msg); ++ struct virtio_snd_hdr *response = virtsnd_ctl_msg_response(msg); ++ unsigned int nouts = 0; ++ unsigned int nins = 0; ++ struct scatterlist *psgs[4]; ++ bool notify = false; ++ unsigned long flags; ++ int rc; ++ ++ virtsnd_ctl_msg_ref(msg); ++ ++ /* Set the default status in case the message was canceled. */ ++ response->code = cpu_to_le32(VIRTIO_SND_S_IO_ERR); ++ ++ psgs[nouts++] = &msg->sg_request; ++ if (out_sgs) ++ psgs[nouts++] = out_sgs; ++ ++ psgs[nouts + nins++] = &msg->sg_response; ++ if (in_sgs) ++ psgs[nouts + nins++] = in_sgs; ++ ++ spin_lock_irqsave(&queue->lock, flags); ++ rc = virtqueue_add_sgs(queue->vqueue, psgs, nouts, nins, msg, ++ GFP_ATOMIC); ++ if (!rc) { ++ notify = virtqueue_kick_prepare(queue->vqueue); ++ ++ list_add_tail(&msg->list, &snd->ctl_msgs); ++ } ++ spin_unlock_irqrestore(&queue->lock, flags); ++ ++ if (rc) { ++ dev_err(&vdev->dev, "failed to send control message (0x%08x)\n", ++ le32_to_cpu(request->code)); ++ ++ /* ++ * Since in this case virtsnd_ctl_msg_complete() will not be ++ * called, it is necessary to decrement the reference count. ++ */ ++ virtsnd_ctl_msg_unref(msg); ++ ++ goto on_exit; ++ } ++ ++ if (notify) ++ virtqueue_notify(queue->vqueue); ++ ++ if (nowait) ++ goto on_exit; ++ ++ rc = wait_for_completion_interruptible_timeout(&msg->notify, js); ++ if (rc <= 0) { ++ if (!rc) { ++ dev_err(&vdev->dev, ++ "control message (0x%08x) timeout\n", ++ le32_to_cpu(request->code)); ++ rc = -ETIMEDOUT; ++ } ++ ++ goto on_exit; ++ } ++ ++ switch (le32_to_cpu(response->code)) { ++ case VIRTIO_SND_S_OK: ++ rc = 0; ++ break; ++ case VIRTIO_SND_S_NOT_SUPP: ++ rc = -EOPNOTSUPP; ++ break; ++ case VIRTIO_SND_S_IO_ERR: ++ rc = -EIO; ++ break; ++ default: ++ rc = -EINVAL; ++ break; ++ } ++ ++on_exit: ++ virtsnd_ctl_msg_unref(msg); ++ ++ return rc; ++} ++ ++/** ++ * virtsnd_ctl_msg_complete() - Complete a control message. ++ * @msg: Control message. ++ * ++ * Context: Any context. Expects the control queue spinlock to be held by ++ * caller. ++ */ ++void virtsnd_ctl_msg_complete(struct virtio_snd_msg *msg) ++{ ++ list_del(&msg->list); ++ complete(&msg->notify); ++ ++ virtsnd_ctl_msg_unref(msg); ++} ++ ++/** ++ * virtsnd_ctl_msg_cancel_all() - Cancel all pending control messages. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context. ++ */ ++void virtsnd_ctl_msg_cancel_all(struct virtio_snd *snd) ++{ ++ struct virtio_snd_queue *queue = virtsnd_control_queue(snd); ++ unsigned long flags; ++ ++ spin_lock_irqsave(&queue->lock, flags); ++ while (!list_empty(&snd->ctl_msgs)) { ++ struct virtio_snd_msg *msg = ++ list_first_entry(&snd->ctl_msgs, struct virtio_snd_msg, ++ list); ++ ++ virtsnd_ctl_msg_complete(msg); ++ } ++ spin_unlock_irqrestore(&queue->lock, flags); ++} ++ ++/** ++ * virtsnd_ctl_query_info() - Query the item configuration from the device. ++ * @snd: VirtIO sound device. ++ * @command: Control request code (VIRTIO_SND_R_XXX_INFO). ++ * @start_id: Item start identifier. ++ * @count: Item count to query. ++ * @size: Item information size in bytes. ++ * @info: Buffer for storing item information. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_ctl_query_info(struct virtio_snd *snd, int command, int start_id, ++ int count, size_t size, void *info) ++{ ++ struct virtio_snd_msg *msg; ++ struct virtio_snd_query_info *query; ++ struct scatterlist sg; ++ ++ msg = virtsnd_ctl_msg_alloc(sizeof(*query), ++ sizeof(struct virtio_snd_hdr), GFP_KERNEL); ++ if (!msg) ++ return -ENOMEM; ++ ++ query = virtsnd_ctl_msg_request(msg); ++ query->hdr.code = cpu_to_le32(command); ++ query->start_id = cpu_to_le32(start_id); ++ query->count = cpu_to_le32(count); ++ query->size = cpu_to_le32(size); ++ ++ sg_init_one(&sg, info, count * size); ++ ++ return virtsnd_ctl_msg_send(snd, msg, NULL, &sg, false); ++} ++ ++/** ++ * virtsnd_ctl_notify_cb() - Process all completed control messages. ++ * @vqueue: Underlying control virtqueue. ++ * ++ * This callback function is called upon a vring interrupt request from the ++ * device. ++ * ++ * Context: Interrupt context. Takes and releases the control queue spinlock. ++ */ ++void virtsnd_ctl_notify_cb(struct virtqueue *vqueue) ++{ ++ struct virtio_snd *snd = vqueue->vdev->priv; ++ struct virtio_snd_queue *queue = virtsnd_control_queue(snd); ++ struct virtio_snd_msg *msg; ++ u32 length; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&queue->lock, flags); ++ do { ++ virtqueue_disable_cb(vqueue); ++ while ((msg = virtqueue_get_buf(vqueue, &length))) ++ virtsnd_ctl_msg_complete(msg); ++ if (unlikely(virtqueue_is_broken(vqueue))) ++ break; ++ } while (!virtqueue_enable_cb(vqueue)); ++ spin_unlock_irqrestore(&queue->lock, flags); ++} +diff --git a/sound/virtio/virtio_ctl_msg.h b/sound/virtio/virtio_ctl_msg.h +new file mode 100644 +index 000000000000..7f4db044f28e +--- /dev/null ++++ b/sound/virtio/virtio_ctl_msg.h +@@ -0,0 +1,78 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#ifndef VIRTIO_SND_MSG_H ++#define VIRTIO_SND_MSG_H ++ ++#include <linux/atomic.h> ++#include <linux/virtio.h> ++ ++struct virtio_snd; ++struct virtio_snd_msg; ++ ++void virtsnd_ctl_msg_ref(struct virtio_snd_msg *msg); ++ ++void virtsnd_ctl_msg_unref(struct virtio_snd_msg *msg); ++ ++void *virtsnd_ctl_msg_request(struct virtio_snd_msg *msg); ++ ++void *virtsnd_ctl_msg_response(struct virtio_snd_msg *msg); ++ ++struct virtio_snd_msg *virtsnd_ctl_msg_alloc(size_t request_size, ++ size_t response_size, gfp_t gfp); ++ ++int virtsnd_ctl_msg_send(struct virtio_snd *snd, struct virtio_snd_msg *msg, ++ struct scatterlist *out_sgs, ++ struct scatterlist *in_sgs, bool nowait); ++ ++/** ++ * virtsnd_ctl_msg_send_sync() - Simplified sending of synchronous message. ++ * @snd: VirtIO sound device. ++ * @msg: Control message. ++ * ++ * After returning from this function, the message will be deleted. If message ++ * content is still needed, the caller must additionally to ++ * virtsnd_ctl_msg_ref/unref() it. ++ * ++ * The msg_timeout_ms module parameter defines the message completion timeout. ++ * If the message is not completed within this time, the function will return an ++ * error. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ * ++ * The return value is a message status code (VIRTIO_SND_S_XXX) converted to an ++ * appropriate -errno value. ++ */ ++static inline int virtsnd_ctl_msg_send_sync(struct virtio_snd *snd, ++ struct virtio_snd_msg *msg) ++{ ++ return virtsnd_ctl_msg_send(snd, msg, NULL, NULL, false); ++} ++ ++/** ++ * virtsnd_ctl_msg_send_async() - Simplified sending of asynchronous message. ++ * @snd: VirtIO sound device. ++ * @msg: Control message. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static inline int virtsnd_ctl_msg_send_async(struct virtio_snd *snd, ++ struct virtio_snd_msg *msg) ++{ ++ return virtsnd_ctl_msg_send(snd, msg, NULL, NULL, true); ++} ++ ++void virtsnd_ctl_msg_cancel_all(struct virtio_snd *snd); ++ ++void virtsnd_ctl_msg_complete(struct virtio_snd_msg *msg); ++ ++int virtsnd_ctl_query_info(struct virtio_snd *snd, int command, int start_id, ++ int count, size_t size, void *info); ++ ++void virtsnd_ctl_notify_cb(struct virtqueue *vqueue); ++ ++#endif /* VIRTIO_SND_MSG_H */ +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0003-ALSA-virtio-build-PCM-devices-and-substream-hardware.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0003-ALSA-virtio-build-PCM-devices-and-substream-hardware.patch new file mode 100644 index 00000000..722c5b89 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0003-ALSA-virtio-build-PCM-devices-and-substream-hardware.patch @@ -0,0 +1,705 @@ +From 9717557af201dd81cbc202660bc24d7b63558be6 Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:04 +0100 +Subject: [PATCH 3/9] ALSA: virtio: build PCM devices and substream hardware + descriptors + +Like the HDA specification, the virtio sound device specification links +PCM substreams, jacks and PCM channel maps into functional groups. For +each discovered group, a PCM device is created, the number of which +coincides with the group number. + +Introduce the module parameters for setting the hardware buffer +parameters: + pcm_buffer_ms [=160] + pcm_periods_min [=2] + pcm_periods_max [=16] + pcm_period_ms_min [=10] + pcm_period_ms_max [=80] + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-5-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/Makefile | 3 +- + sound/virtio/virtio_card.c | 18 ++ + sound/virtio/virtio_card.h | 10 + + sound/virtio/virtio_pcm.c | 479 +++++++++++++++++++++++++++++++++++++ + sound/virtio/virtio_pcm.h | 72 ++++++ + 5 files changed, 581 insertions(+), 1 deletion(-) + create mode 100644 sound/virtio/virtio_pcm.c + create mode 100644 sound/virtio/virtio_pcm.h + +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +index dc551e637441..69162a545a41 100644 +--- a/sound/virtio/Makefile ++++ b/sound/virtio/Makefile +@@ -4,5 +4,6 @@ obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o + + virtio_snd-objs := \ + virtio_card.o \ +- virtio_ctl_msg.o ++ virtio_ctl_msg.o \ ++ virtio_pcm.o + +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index b757b2444078..11c76ee311b7 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -209,6 +209,16 @@ static int virtsnd_build_devs(struct virtio_snd *snd) + VIRTIO_SND_CARD_NAME " at %s/%s", + dev_name(dev->parent), dev_name(dev)); + ++ rc = virtsnd_pcm_parse_cfg(snd); ++ if (rc) ++ return rc; ++ ++ if (snd->nsubstreams) { ++ rc = virtsnd_pcm_build_devs(snd); ++ if (rc) ++ return rc; ++ } ++ + return snd_card_register(snd->card); + } + +@@ -237,6 +247,9 @@ static int virtsnd_validate(struct virtio_device *vdev) + return -EINVAL; + } + ++ if (virtsnd_pcm_validate(vdev)) ++ return -EINVAL; ++ + return 0; + } + +@@ -259,6 +272,7 @@ static int virtsnd_probe(struct virtio_device *vdev) + + snd->vdev = vdev; + INIT_LIST_HEAD(&snd->ctl_msgs); ++ INIT_LIST_HEAD(&snd->pcm_list); + + vdev->priv = snd; + +@@ -293,6 +307,7 @@ static int virtsnd_probe(struct virtio_device *vdev) + static void virtsnd_remove(struct virtio_device *vdev) + { + struct virtio_snd *snd = vdev->priv; ++ unsigned int i; + + virtsnd_disable_event_vq(snd); + virtsnd_ctl_msg_cancel_all(snd); +@@ -303,6 +318,9 @@ static void virtsnd_remove(struct virtio_device *vdev) + vdev->config->del_vqs(vdev); + vdev->config->reset(vdev); + ++ for (i = 0; snd->substreams && i < snd->nsubstreams; ++i) ++ cancel_work_sync(&snd->substreams[i].elapsed_period); ++ + kfree(snd->event_msgs); + } + +diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h +index 1e76eeff160f..77a1b7255370 100644 +--- a/sound/virtio/virtio_card.h ++++ b/sound/virtio/virtio_card.h +@@ -12,9 +12,13 @@ + #include <uapi/linux/virtio_snd.h> + + #include "virtio_ctl_msg.h" ++#include "virtio_pcm.h" + + #define VIRTIO_SND_CARD_DRIVER "virtio-snd" + #define VIRTIO_SND_CARD_NAME "VirtIO SoundCard" ++#define VIRTIO_SND_PCM_NAME "VirtIO PCM" ++ ++struct virtio_pcm_substream; + + /** + * struct virtio_snd_queue - Virtqueue wrapper structure. +@@ -33,6 +37,9 @@ struct virtio_snd_queue { + * @card: ALSA sound card. + * @ctl_msgs: Pending control request list. + * @event_msgs: Device events. ++ * @pcm_list: VirtIO PCM device list. ++ * @substreams: VirtIO PCM substreams. ++ * @nsubstreams: Number of PCM substreams. + */ + struct virtio_snd { + struct virtio_device *vdev; +@@ -40,6 +47,9 @@ struct virtio_snd { + struct snd_card *card; + struct list_head ctl_msgs; + struct virtio_snd_event *event_msgs; ++ struct list_head pcm_list; ++ struct virtio_pcm_substream *substreams; ++ u32 nsubstreams; + }; + + /* Message completion timeout in milliseconds (module parameter). */ +diff --git a/sound/virtio/virtio_pcm.c b/sound/virtio/virtio_pcm.c +new file mode 100644 +index 000000000000..e16567e2e214 +--- /dev/null ++++ b/sound/virtio/virtio_pcm.c +@@ -0,0 +1,479 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <linux/moduleparam.h> ++#include <linux/virtio_config.h> ++ ++#include "virtio_card.h" ++ ++static u32 pcm_buffer_ms = 160; ++module_param(pcm_buffer_ms, uint, 0644); ++MODULE_PARM_DESC(pcm_buffer_ms, "PCM substream buffer time in milliseconds"); ++ ++static u32 pcm_periods_min = 2; ++module_param(pcm_periods_min, uint, 0644); ++MODULE_PARM_DESC(pcm_periods_min, "Minimum number of PCM periods"); ++ ++static u32 pcm_periods_max = 16; ++module_param(pcm_periods_max, uint, 0644); ++MODULE_PARM_DESC(pcm_periods_max, "Maximum number of PCM periods"); ++ ++static u32 pcm_period_ms_min = 10; ++module_param(pcm_period_ms_min, uint, 0644); ++MODULE_PARM_DESC(pcm_period_ms_min, "Minimum PCM period time in milliseconds"); ++ ++static u32 pcm_period_ms_max = 80; ++module_param(pcm_period_ms_max, uint, 0644); ++MODULE_PARM_DESC(pcm_period_ms_max, "Maximum PCM period time in milliseconds"); ++ ++/* Map for converting VirtIO format to ALSA format. */ ++static const snd_pcm_format_t g_v2a_format_map[] = { ++ [VIRTIO_SND_PCM_FMT_IMA_ADPCM] = SNDRV_PCM_FORMAT_IMA_ADPCM, ++ [VIRTIO_SND_PCM_FMT_MU_LAW] = SNDRV_PCM_FORMAT_MU_LAW, ++ [VIRTIO_SND_PCM_FMT_A_LAW] = SNDRV_PCM_FORMAT_A_LAW, ++ [VIRTIO_SND_PCM_FMT_S8] = SNDRV_PCM_FORMAT_S8, ++ [VIRTIO_SND_PCM_FMT_U8] = SNDRV_PCM_FORMAT_U8, ++ [VIRTIO_SND_PCM_FMT_S16] = SNDRV_PCM_FORMAT_S16_LE, ++ [VIRTIO_SND_PCM_FMT_U16] = SNDRV_PCM_FORMAT_U16_LE, ++ [VIRTIO_SND_PCM_FMT_S18_3] = SNDRV_PCM_FORMAT_S18_3LE, ++ [VIRTIO_SND_PCM_FMT_U18_3] = SNDRV_PCM_FORMAT_U18_3LE, ++ [VIRTIO_SND_PCM_FMT_S20_3] = SNDRV_PCM_FORMAT_S20_3LE, ++ [VIRTIO_SND_PCM_FMT_U20_3] = SNDRV_PCM_FORMAT_U20_3LE, ++ [VIRTIO_SND_PCM_FMT_S24_3] = SNDRV_PCM_FORMAT_S24_3LE, ++ [VIRTIO_SND_PCM_FMT_U24_3] = SNDRV_PCM_FORMAT_U24_3LE, ++ [VIRTIO_SND_PCM_FMT_S20] = SNDRV_PCM_FORMAT_S20_LE, ++ [VIRTIO_SND_PCM_FMT_U20] = SNDRV_PCM_FORMAT_U20_LE, ++ [VIRTIO_SND_PCM_FMT_S24] = SNDRV_PCM_FORMAT_S24_LE, ++ [VIRTIO_SND_PCM_FMT_U24] = SNDRV_PCM_FORMAT_U24_LE, ++ [VIRTIO_SND_PCM_FMT_S32] = SNDRV_PCM_FORMAT_S32_LE, ++ [VIRTIO_SND_PCM_FMT_U32] = SNDRV_PCM_FORMAT_U32_LE, ++ [VIRTIO_SND_PCM_FMT_FLOAT] = SNDRV_PCM_FORMAT_FLOAT_LE, ++ [VIRTIO_SND_PCM_FMT_FLOAT64] = SNDRV_PCM_FORMAT_FLOAT64_LE, ++ [VIRTIO_SND_PCM_FMT_DSD_U8] = SNDRV_PCM_FORMAT_DSD_U8, ++ [VIRTIO_SND_PCM_FMT_DSD_U16] = SNDRV_PCM_FORMAT_DSD_U16_LE, ++ [VIRTIO_SND_PCM_FMT_DSD_U32] = SNDRV_PCM_FORMAT_DSD_U32_LE, ++ [VIRTIO_SND_PCM_FMT_IEC958_SUBFRAME] = ++ SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE ++}; ++ ++/* Map for converting VirtIO frame rate to ALSA frame rate. */ ++struct virtsnd_v2a_rate { ++ unsigned int alsa_bit; ++ unsigned int rate; ++}; ++ ++static const struct virtsnd_v2a_rate g_v2a_rate_map[] = { ++ [VIRTIO_SND_PCM_RATE_5512] = { SNDRV_PCM_RATE_5512, 5512 }, ++ [VIRTIO_SND_PCM_RATE_8000] = { SNDRV_PCM_RATE_8000, 8000 }, ++ [VIRTIO_SND_PCM_RATE_11025] = { SNDRV_PCM_RATE_11025, 11025 }, ++ [VIRTIO_SND_PCM_RATE_16000] = { SNDRV_PCM_RATE_16000, 16000 }, ++ [VIRTIO_SND_PCM_RATE_22050] = { SNDRV_PCM_RATE_22050, 22050 }, ++ [VIRTIO_SND_PCM_RATE_32000] = { SNDRV_PCM_RATE_32000, 32000 }, ++ [VIRTIO_SND_PCM_RATE_44100] = { SNDRV_PCM_RATE_44100, 44100 }, ++ [VIRTIO_SND_PCM_RATE_48000] = { SNDRV_PCM_RATE_48000, 48000 }, ++ [VIRTIO_SND_PCM_RATE_64000] = { SNDRV_PCM_RATE_64000, 64000 }, ++ [VIRTIO_SND_PCM_RATE_88200] = { SNDRV_PCM_RATE_88200, 88200 }, ++ [VIRTIO_SND_PCM_RATE_96000] = { SNDRV_PCM_RATE_96000, 96000 }, ++ [VIRTIO_SND_PCM_RATE_176400] = { SNDRV_PCM_RATE_176400, 176400 }, ++ [VIRTIO_SND_PCM_RATE_192000] = { SNDRV_PCM_RATE_192000, 192000 } ++}; ++ ++/** ++ * virtsnd_pcm_build_hw() - Parse substream config and build HW descriptor. ++ * @vss: VirtIO substream. ++ * @info: VirtIO substream information entry. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -EINVAL if configuration is invalid. ++ */ ++static int virtsnd_pcm_build_hw(struct virtio_pcm_substream *vss, ++ struct virtio_snd_pcm_info *info) ++{ ++ struct virtio_device *vdev = vss->snd->vdev; ++ unsigned int i; ++ u64 values; ++ size_t sample_max = 0; ++ size_t sample_min = 0; ++ ++ vss->features = le32_to_cpu(info->features); ++ ++ /* ++ * TODO: set SNDRV_PCM_INFO_{BATCH,BLOCK_TRANSFER} if device supports ++ * only message-based transport. ++ */ ++ vss->hw.info = ++ SNDRV_PCM_INFO_MMAP | ++ SNDRV_PCM_INFO_MMAP_VALID | ++ SNDRV_PCM_INFO_BATCH | ++ SNDRV_PCM_INFO_BLOCK_TRANSFER | ++ SNDRV_PCM_INFO_INTERLEAVED | ++ SNDRV_PCM_INFO_PAUSE; ++ ++ if (!info->channels_min || info->channels_min > info->channels_max) { ++ dev_err(&vdev->dev, ++ "SID %u: invalid channel range [%u %u]\n", ++ vss->sid, info->channels_min, info->channels_max); ++ return -EINVAL; ++ } ++ ++ vss->hw.channels_min = info->channels_min; ++ vss->hw.channels_max = info->channels_max; ++ ++ values = le64_to_cpu(info->formats); ++ ++ vss->hw.formats = 0; ++ ++ for (i = 0; i < ARRAY_SIZE(g_v2a_format_map); ++i) ++ if (values & (1ULL << i)) { ++ snd_pcm_format_t alsa_fmt = g_v2a_format_map[i]; ++ int bytes = snd_pcm_format_physical_width(alsa_fmt) / 8; ++ ++ if (!sample_min || sample_min > bytes) ++ sample_min = bytes; ++ ++ if (sample_max < bytes) ++ sample_max = bytes; ++ ++ vss->hw.formats |= pcm_format_to_bits(alsa_fmt); ++ } ++ ++ if (!vss->hw.formats) { ++ dev_err(&vdev->dev, ++ "SID %u: no supported PCM sample formats found\n", ++ vss->sid); ++ return -EINVAL; ++ } ++ ++ values = le64_to_cpu(info->rates); ++ ++ vss->hw.rates = 0; ++ ++ for (i = 0; i < ARRAY_SIZE(g_v2a_rate_map); ++i) ++ if (values & (1ULL << i)) { ++ if (!vss->hw.rate_min || ++ vss->hw.rate_min > g_v2a_rate_map[i].rate) ++ vss->hw.rate_min = g_v2a_rate_map[i].rate; ++ ++ if (vss->hw.rate_max < g_v2a_rate_map[i].rate) ++ vss->hw.rate_max = g_v2a_rate_map[i].rate; ++ ++ vss->hw.rates |= g_v2a_rate_map[i].alsa_bit; ++ } ++ ++ if (!vss->hw.rates) { ++ dev_err(&vdev->dev, ++ "SID %u: no supported PCM frame rates found\n", ++ vss->sid); ++ return -EINVAL; ++ } ++ ++ vss->hw.periods_min = pcm_periods_min; ++ vss->hw.periods_max = pcm_periods_max; ++ ++ /* ++ * We must ensure that there is enough space in the buffer to store ++ * pcm_buffer_ms ms for the combination (Cmax, Smax, Rmax), where: ++ * Cmax = maximum supported number of channels, ++ * Smax = maximum supported sample size in bytes, ++ * Rmax = maximum supported frame rate. ++ */ ++ vss->hw.buffer_bytes_max = ++ PAGE_ALIGN(sample_max * vss->hw.channels_max * pcm_buffer_ms * ++ (vss->hw.rate_max / MSEC_PER_SEC)); ++ ++ /* ++ * We must ensure that the minimum period size is enough to store ++ * pcm_period_ms_min ms for the combination (Cmin, Smin, Rmin), where: ++ * Cmin = minimum supported number of channels, ++ * Smin = minimum supported sample size in bytes, ++ * Rmin = minimum supported frame rate. ++ */ ++ vss->hw.period_bytes_min = ++ sample_min * vss->hw.channels_min * pcm_period_ms_min * ++ (vss->hw.rate_min / MSEC_PER_SEC); ++ ++ /* ++ * We must ensure that the maximum period size is enough to store ++ * pcm_period_ms_max ms for the combination (Cmax, Smax, Rmax). ++ */ ++ vss->hw.period_bytes_max = ++ sample_max * vss->hw.channels_max * pcm_period_ms_max * ++ (vss->hw.rate_max / MSEC_PER_SEC); ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_find() - Find the PCM device for the specified node ID. ++ * @snd: VirtIO sound device. ++ * @nid: Function node ID. ++ * ++ * Context: Any context. ++ * Return: a pointer to the PCM device or ERR_PTR(-ENOENT). ++ */ ++struct virtio_pcm *virtsnd_pcm_find(struct virtio_snd *snd, u32 nid) ++{ ++ struct virtio_pcm *vpcm; ++ ++ list_for_each_entry(vpcm, &snd->pcm_list, list) ++ if (vpcm->nid == nid) ++ return vpcm; ++ ++ return ERR_PTR(-ENOENT); ++} ++ ++/** ++ * virtsnd_pcm_find_or_create() - Find or create the PCM device for the ++ * specified node ID. ++ * @snd: VirtIO sound device. ++ * @nid: Function node ID. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: a pointer to the PCM device or ERR_PTR(-errno). ++ */ ++struct virtio_pcm *virtsnd_pcm_find_or_create(struct virtio_snd *snd, u32 nid) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct virtio_pcm *vpcm; ++ ++ vpcm = virtsnd_pcm_find(snd, nid); ++ if (!IS_ERR(vpcm)) ++ return vpcm; ++ ++ vpcm = devm_kzalloc(&vdev->dev, sizeof(*vpcm), GFP_KERNEL); ++ if (!vpcm) ++ return ERR_PTR(-ENOMEM); ++ ++ vpcm->nid = nid; ++ list_add_tail(&vpcm->list, &snd->pcm_list); ++ ++ return vpcm; ++} ++ ++/** ++ * virtsnd_pcm_validate() - Validate if the device can be started. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -EINVAL on failure. ++ */ ++int virtsnd_pcm_validate(struct virtio_device *vdev) ++{ ++ if (pcm_periods_min < 2 || pcm_periods_min > pcm_periods_max) { ++ dev_err(&vdev->dev, ++ "invalid range [%u %u] of the number of PCM periods\n", ++ pcm_periods_min, pcm_periods_max); ++ return -EINVAL; ++ } ++ ++ if (!pcm_period_ms_min || pcm_period_ms_min > pcm_period_ms_max) { ++ dev_err(&vdev->dev, ++ "invalid range [%u %u] of the size of the PCM period\n", ++ pcm_period_ms_min, pcm_period_ms_max); ++ return -EINVAL; ++ } ++ ++ if (pcm_buffer_ms < pcm_periods_min * pcm_period_ms_min) { ++ dev_err(&vdev->dev, ++ "pcm_buffer_ms(=%u) value cannot be < %u ms\n", ++ pcm_buffer_ms, pcm_periods_min * pcm_period_ms_min); ++ return -EINVAL; ++ } ++ ++ if (pcm_period_ms_max > pcm_buffer_ms / 2) { ++ dev_err(&vdev->dev, ++ "pcm_period_ms_max(=%u) value cannot be > %u ms\n", ++ pcm_period_ms_max, pcm_buffer_ms / 2); ++ return -EINVAL; ++ } ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_period_elapsed() - Kernel work function to handle the elapsed ++ * period state. ++ * @work: Elapsed period work. ++ * ++ * The main purpose of this function is to call snd_pcm_period_elapsed() in ++ * a process context, not in an interrupt context. This is necessary because PCM ++ * devices operate in non-atomic mode. ++ * ++ * Context: Process context. ++ */ ++static void virtsnd_pcm_period_elapsed(struct work_struct *work) ++{ ++ struct virtio_pcm_substream *vss = ++ container_of(work, struct virtio_pcm_substream, elapsed_period); ++ ++ snd_pcm_period_elapsed(vss->substream); ++} ++ ++/** ++ * virtsnd_pcm_parse_cfg() - Parse the stream configuration. ++ * @snd: VirtIO sound device. ++ * ++ * This function is called during initial device initialization. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_pcm_parse_cfg(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct virtio_snd_pcm_info *info; ++ u32 i; ++ int rc; ++ ++ virtio_cread_le(vdev, struct virtio_snd_config, streams, ++ &snd->nsubstreams); ++ if (!snd->nsubstreams) ++ return 0; ++ ++ snd->substreams = devm_kcalloc(&vdev->dev, snd->nsubstreams, ++ sizeof(*snd->substreams), GFP_KERNEL); ++ if (!snd->substreams) ++ return -ENOMEM; ++ ++ info = kcalloc(snd->nsubstreams, sizeof(*info), GFP_KERNEL); ++ if (!info) ++ return -ENOMEM; ++ ++ rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_PCM_INFO, 0, ++ snd->nsubstreams, sizeof(*info), info); ++ if (rc) ++ goto on_exit; ++ ++ for (i = 0; i < snd->nsubstreams; ++i) { ++ struct virtio_pcm_substream *vss = &snd->substreams[i]; ++ struct virtio_pcm *vpcm; ++ ++ vss->snd = snd; ++ vss->sid = i; ++ INIT_WORK(&vss->elapsed_period, virtsnd_pcm_period_elapsed); ++ ++ rc = virtsnd_pcm_build_hw(vss, &info[i]); ++ if (rc) ++ goto on_exit; ++ ++ vss->nid = le32_to_cpu(info[i].hdr.hda_fn_nid); ++ ++ vpcm = virtsnd_pcm_find_or_create(snd, vss->nid); ++ if (IS_ERR(vpcm)) { ++ rc = PTR_ERR(vpcm); ++ goto on_exit; ++ } ++ ++ switch (info[i].direction) { ++ case VIRTIO_SND_D_OUTPUT: ++ vss->direction = SNDRV_PCM_STREAM_PLAYBACK; ++ break; ++ case VIRTIO_SND_D_INPUT: ++ vss->direction = SNDRV_PCM_STREAM_CAPTURE; ++ break; ++ default: ++ dev_err(&vdev->dev, "SID %u: unknown direction (%u)\n", ++ vss->sid, info[i].direction); ++ rc = -EINVAL; ++ goto on_exit; ++ } ++ ++ vpcm->streams[vss->direction].nsubstreams++; ++ } ++ ++on_exit: ++ kfree(info); ++ ++ return rc; ++} ++ ++/** ++ * virtsnd_pcm_build_devs() - Build ALSA PCM devices. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_pcm_build_devs(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct virtio_pcm *vpcm; ++ u32 i; ++ int rc; ++ ++ list_for_each_entry(vpcm, &snd->pcm_list, list) { ++ unsigned int npbs = ++ vpcm->streams[SNDRV_PCM_STREAM_PLAYBACK].nsubstreams; ++ unsigned int ncps = ++ vpcm->streams[SNDRV_PCM_STREAM_CAPTURE].nsubstreams; ++ ++ if (!npbs && !ncps) ++ continue; ++ ++ rc = snd_pcm_new(snd->card, VIRTIO_SND_CARD_DRIVER, vpcm->nid, ++ npbs, ncps, &vpcm->pcm); ++ if (rc) { ++ dev_err(&vdev->dev, "snd_pcm_new[%u] failed: %d\n", ++ vpcm->nid, rc); ++ return rc; ++ } ++ ++ vpcm->pcm->info_flags = 0; ++ vpcm->pcm->dev_class = SNDRV_PCM_CLASS_GENERIC; ++ vpcm->pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX; ++ snprintf(vpcm->pcm->name, sizeof(vpcm->pcm->name), ++ VIRTIO_SND_PCM_NAME " %u", vpcm->pcm->device); ++ vpcm->pcm->private_data = vpcm; ++ vpcm->pcm->nonatomic = true; ++ ++ for (i = 0; i < ARRAY_SIZE(vpcm->streams); ++i) { ++ struct virtio_pcm_stream *stream = &vpcm->streams[i]; ++ ++ if (!stream->nsubstreams) ++ continue; ++ ++ stream->substreams = ++ devm_kcalloc(&vdev->dev, stream->nsubstreams, ++ sizeof(*stream->substreams), ++ GFP_KERNEL); ++ if (!stream->substreams) ++ return -ENOMEM; ++ ++ stream->nsubstreams = 0; ++ } ++ } ++ ++ for (i = 0; i < snd->nsubstreams; ++i) { ++ struct virtio_pcm_stream *vs; ++ struct virtio_pcm_substream *vss = &snd->substreams[i]; ++ ++ vpcm = virtsnd_pcm_find(snd, vss->nid); ++ if (IS_ERR(vpcm)) ++ return PTR_ERR(vpcm); ++ ++ vs = &vpcm->streams[vss->direction]; ++ vs->substreams[vs->nsubstreams++] = vss; ++ } ++ ++ list_for_each_entry(vpcm, &snd->pcm_list, list) { ++ for (i = 0; i < ARRAY_SIZE(vpcm->streams); ++i) { ++ struct virtio_pcm_stream *vs = &vpcm->streams[i]; ++ struct snd_pcm_str *ks = &vpcm->pcm->streams[i]; ++ struct snd_pcm_substream *kss; ++ ++ if (!vs->nsubstreams) ++ continue; ++ ++ for (kss = ks->substream; kss; kss = kss->next) ++ vs->substreams[kss->number]->substream = kss; ++ } ++ ++ snd_pcm_set_managed_buffer_all(vpcm->pcm, ++ SNDRV_DMA_TYPE_VMALLOC, NULL, ++ 0, 0); ++ } ++ ++ return 0; ++} +diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h +new file mode 100644 +index 000000000000..84f2f3f14f48 +--- /dev/null ++++ b/sound/virtio/virtio_pcm.h +@@ -0,0 +1,72 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#ifndef VIRTIO_SND_PCM_H ++#define VIRTIO_SND_PCM_H ++ ++#include <linux/atomic.h> ++#include <linux/virtio_config.h> ++#include <sound/pcm.h> ++ ++struct virtio_pcm; ++struct virtio_pcm_msg; ++ ++/** ++ * struct virtio_pcm_substream - VirtIO PCM substream. ++ * @snd: VirtIO sound device. ++ * @nid: Function group node identifier. ++ * @sid: Stream identifier. ++ * @direction: Stream data flow direction (SNDRV_PCM_STREAM_XXX). ++ * @features: Stream VirtIO feature bit map (1 << VIRTIO_SND_PCM_F_XXX). ++ * @substream: Kernel ALSA substream. ++ * @hw: Kernel ALSA substream hardware descriptor. ++ * @elapsed_period: Kernel work to handle the elapsed period state. ++ */ ++struct virtio_pcm_substream { ++ struct virtio_snd *snd; ++ u32 nid; ++ u32 sid; ++ u32 direction; ++ u32 features; ++ struct snd_pcm_substream *substream; ++ struct snd_pcm_hardware hw; ++ struct work_struct elapsed_period; ++}; ++ ++/** ++ * struct virtio_pcm_stream - VirtIO PCM stream. ++ * @substreams: VirtIO substreams belonging to the stream. ++ * @nsubstreams: Number of substreams. ++ */ ++struct virtio_pcm_stream { ++ struct virtio_pcm_substream **substreams; ++ u32 nsubstreams; ++}; ++ ++/** ++ * struct virtio_pcm - VirtIO PCM device. ++ * @list: VirtIO PCM list entry. ++ * @nid: Function group node identifier. ++ * @pcm: Kernel PCM device. ++ * @streams: VirtIO PCM streams (playback and capture). ++ */ ++struct virtio_pcm { ++ struct list_head list; ++ u32 nid; ++ struct snd_pcm *pcm; ++ struct virtio_pcm_stream streams[SNDRV_PCM_STREAM_LAST + 1]; ++}; ++ ++int virtsnd_pcm_validate(struct virtio_device *vdev); ++ ++int virtsnd_pcm_parse_cfg(struct virtio_snd *snd); ++ ++int virtsnd_pcm_build_devs(struct virtio_snd *snd); ++ ++struct virtio_pcm *virtsnd_pcm_find(struct virtio_snd *snd, u32 nid); ++ ++struct virtio_pcm *virtsnd_pcm_find_or_create(struct virtio_snd *snd, u32 nid); ++ ++#endif /* VIRTIO_SND_PCM_H */ +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0004-ALSA-virtio-handling-control-and-I-O-messages-for-th.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0004-ALSA-virtio-handling-control-and-I-O-messages-for-th.patch new file mode 100644 index 00000000..595a3491 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0004-ALSA-virtio-handling-control-and-I-O-messages-for-th.patch @@ -0,0 +1,647 @@ +From 66c8ceba6b127e352daa74e27f2d9d06c4c36801 Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:05 +0100 +Subject: [PATCH 4/9] ALSA: virtio: handling control and I/O messages for the + PCM device + +The driver implements a message-based transport for I/O substream +operations. Before the start of the substream, the hardware buffer is +sliced into I/O messages, the number of which is equal to the current +number of periods. The size of each message is equal to the current +size of one period. + +I/O messages are organized in an ordered queue. The completion of the +I/O message indicates an elapsed period (the only exception is the end +of the stream for the capture substream). Upon completion, the message +is automatically re-added to the end of the queue. + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-6-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/Makefile | 3 +- + sound/virtio/virtio_card.c | 22 +- + sound/virtio/virtio_card.h | 9 + + sound/virtio/virtio_pcm.c | 32 +++ + sound/virtio/virtio_pcm.h | 40 ++++ + sound/virtio/virtio_pcm_msg.c | 414 ++++++++++++++++++++++++++++++++++ + 6 files changed, 515 insertions(+), 5 deletions(-) + create mode 100644 sound/virtio/virtio_pcm_msg.c + +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +index 69162a545a41..626af3cc3ed7 100644 +--- a/sound/virtio/Makefile ++++ b/sound/virtio/Makefile +@@ -5,5 +5,6 @@ obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o + virtio_snd-objs := \ + virtio_card.o \ + virtio_ctl_msg.o \ +- virtio_pcm.o ++ virtio_pcm.o \ ++ virtio_pcm_msg.o + +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index 11c76ee311b7..57b9b7f3a9c0 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -55,6 +55,12 @@ static void virtsnd_event_send(struct virtqueue *vqueue, + static void virtsnd_event_dispatch(struct virtio_snd *snd, + struct virtio_snd_event *event) + { ++ switch (le32_to_cpu(event->hdr.code)) { ++ case VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED: ++ case VIRTIO_SND_EVT_PCM_XRUN: ++ virtsnd_pcm_event(snd, event); ++ break; ++ } + } + + /** +@@ -101,11 +107,15 @@ static int virtsnd_find_vqs(struct virtio_snd *snd) + struct virtio_device *vdev = snd->vdev; + static vq_callback_t *callbacks[VIRTIO_SND_VQ_MAX] = { + [VIRTIO_SND_VQ_CONTROL] = virtsnd_ctl_notify_cb, +- [VIRTIO_SND_VQ_EVENT] = virtsnd_event_notify_cb ++ [VIRTIO_SND_VQ_EVENT] = virtsnd_event_notify_cb, ++ [VIRTIO_SND_VQ_TX] = virtsnd_pcm_tx_notify_cb, ++ [VIRTIO_SND_VQ_RX] = virtsnd_pcm_rx_notify_cb + }; + static const char *names[VIRTIO_SND_VQ_MAX] = { + [VIRTIO_SND_VQ_CONTROL] = "virtsnd-ctl", +- [VIRTIO_SND_VQ_EVENT] = "virtsnd-event" ++ [VIRTIO_SND_VQ_EVENT] = "virtsnd-event", ++ [VIRTIO_SND_VQ_TX] = "virtsnd-tx", ++ [VIRTIO_SND_VQ_RX] = "virtsnd-rx" + }; + struct virtqueue *vqs[VIRTIO_SND_VQ_MAX] = { 0 }; + unsigned int i; +@@ -318,8 +328,12 @@ static void virtsnd_remove(struct virtio_device *vdev) + vdev->config->del_vqs(vdev); + vdev->config->reset(vdev); + +- for (i = 0; snd->substreams && i < snd->nsubstreams; ++i) +- cancel_work_sync(&snd->substreams[i].elapsed_period); ++ for (i = 0; snd->substreams && i < snd->nsubstreams; ++i) { ++ struct virtio_pcm_substream *vss = &snd->substreams[i]; ++ ++ cancel_work_sync(&vss->elapsed_period); ++ virtsnd_pcm_msg_free(vss); ++ } + + kfree(snd->event_msgs); + } +diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h +index 77a1b7255370..c43f9744d362 100644 +--- a/sound/virtio/virtio_card.h ++++ b/sound/virtio/virtio_card.h +@@ -79,4 +79,13 @@ virtsnd_rx_queue(struct virtio_snd *snd) + return &snd->queues[VIRTIO_SND_VQ_RX]; + } + ++static inline struct virtio_snd_queue * ++virtsnd_pcm_queue(struct virtio_pcm_substream *vss) ++{ ++ if (vss->direction == SNDRV_PCM_STREAM_PLAYBACK) ++ return virtsnd_tx_queue(vss->snd); ++ else ++ return virtsnd_rx_queue(vss->snd); ++} ++ + #endif /* VIRTIO_SND_CARD_H */ +diff --git a/sound/virtio/virtio_pcm.c b/sound/virtio/virtio_pcm.c +index e16567e2e214..2dcd763efa29 100644 +--- a/sound/virtio/virtio_pcm.c ++++ b/sound/virtio/virtio_pcm.c +@@ -353,6 +353,8 @@ int virtsnd_pcm_parse_cfg(struct virtio_snd *snd) + vss->snd = snd; + vss->sid = i; + INIT_WORK(&vss->elapsed_period, virtsnd_pcm_period_elapsed); ++ init_waitqueue_head(&vss->msg_empty); ++ spin_lock_init(&vss->lock); + + rc = virtsnd_pcm_build_hw(vss, &info[i]); + if (rc) +@@ -477,3 +479,33 @@ int virtsnd_pcm_build_devs(struct virtio_snd *snd) + + return 0; + } ++ ++/** ++ * virtsnd_pcm_event() - Handle the PCM device event notification. ++ * @snd: VirtIO sound device. ++ * @event: VirtIO sound event. ++ * ++ * Context: Interrupt context. ++ */ ++void virtsnd_pcm_event(struct virtio_snd *snd, struct virtio_snd_event *event) ++{ ++ struct virtio_pcm_substream *vss; ++ u32 sid = le32_to_cpu(event->data); ++ ++ if (sid >= snd->nsubstreams) ++ return; ++ ++ vss = &snd->substreams[sid]; ++ ++ switch (le32_to_cpu(event->hdr.code)) { ++ case VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED: ++ /* TODO: deal with shmem elapsed period */ ++ break; ++ case VIRTIO_SND_EVT_PCM_XRUN: ++ spin_lock(&vss->lock); ++ if (vss->xfer_enabled) ++ vss->xfer_xrun = true; ++ spin_unlock(&vss->lock); ++ break; ++ } ++} +diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h +index 84f2f3f14f48..6722f1139666 100644 +--- a/sound/virtio/virtio_pcm.h ++++ b/sound/virtio/virtio_pcm.h +@@ -23,6 +23,17 @@ struct virtio_pcm_msg; + * @substream: Kernel ALSA substream. + * @hw: Kernel ALSA substream hardware descriptor. + * @elapsed_period: Kernel work to handle the elapsed period state. ++ * @lock: Spinlock that protects fields shared by interrupt handlers and ++ * substream operators. ++ * @buffer_bytes: Current buffer size in bytes. ++ * @hw_ptr: Substream hardware pointer value in bytes [0 ... buffer_bytes). ++ * @xfer_enabled: Data transfer state (0 - off, 1 - on). ++ * @xfer_xrun: Data underflow/overflow state (0 - no xrun, 1 - xrun). ++ * @msgs: Allocated I/O messages. ++ * @nmsgs: Number of allocated I/O messages. ++ * @msg_last_enqueued: Index of the last I/O message added to the virtqueue. ++ * @msg_count: Number of pending I/O messages in the virtqueue. ++ * @msg_empty: Notify when msg_count is zero. + */ + struct virtio_pcm_substream { + struct virtio_snd *snd; +@@ -33,6 +44,16 @@ struct virtio_pcm_substream { + struct snd_pcm_substream *substream; + struct snd_pcm_hardware hw; + struct work_struct elapsed_period; ++ spinlock_t lock; ++ size_t buffer_bytes; ++ size_t hw_ptr; ++ bool xfer_enabled; ++ bool xfer_xrun; ++ struct virtio_pcm_msg **msgs; ++ unsigned int nmsgs; ++ int msg_last_enqueued; ++ unsigned int msg_count; ++ wait_queue_head_t msg_empty; + }; + + /** +@@ -65,8 +86,27 @@ int virtsnd_pcm_parse_cfg(struct virtio_snd *snd); + + int virtsnd_pcm_build_devs(struct virtio_snd *snd); + ++void virtsnd_pcm_event(struct virtio_snd *snd, struct virtio_snd_event *event); ++ ++void virtsnd_pcm_tx_notify_cb(struct virtqueue *vqueue); ++ ++void virtsnd_pcm_rx_notify_cb(struct virtqueue *vqueue); ++ + struct virtio_pcm *virtsnd_pcm_find(struct virtio_snd *snd, u32 nid); + + struct virtio_pcm *virtsnd_pcm_find_or_create(struct virtio_snd *snd, u32 nid); + ++struct virtio_snd_msg * ++virtsnd_pcm_ctl_msg_alloc(struct virtio_pcm_substream *vss, ++ unsigned int command, gfp_t gfp); ++ ++int virtsnd_pcm_msg_alloc(struct virtio_pcm_substream *vss, ++ unsigned int periods, unsigned int period_bytes); ++ ++void virtsnd_pcm_msg_free(struct virtio_pcm_substream *vss); ++ ++int virtsnd_pcm_msg_send(struct virtio_pcm_substream *vss); ++ ++unsigned int virtsnd_pcm_msg_pending_num(struct virtio_pcm_substream *vss); ++ + #endif /* VIRTIO_SND_PCM_H */ +diff --git a/sound/virtio/virtio_pcm_msg.c b/sound/virtio/virtio_pcm_msg.c +new file mode 100644 +index 000000000000..f88c8f29cbd8 +--- /dev/null ++++ b/sound/virtio/virtio_pcm_msg.c +@@ -0,0 +1,414 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <sound/pcm_params.h> ++ ++#include "virtio_card.h" ++ ++/** ++ * struct virtio_pcm_msg - VirtIO I/O message. ++ * @substream: VirtIO PCM substream. ++ * @xfer: Request header payload. ++ * @status: Response header payload. ++ * @length: Data length in bytes. ++ * @sgs: Payload scatter-gather table. ++ */ ++struct virtio_pcm_msg { ++ struct virtio_pcm_substream *substream; ++ struct virtio_snd_pcm_xfer xfer; ++ struct virtio_snd_pcm_status status; ++ size_t length; ++ struct scatterlist sgs[0]; ++}; ++ ++/** ++ * enum pcm_msg_sg_index - Index values for the virtio_pcm_msg->sgs field in ++ * an I/O message. ++ * @PCM_MSG_SG_XFER: Element containing a virtio_snd_pcm_xfer structure. ++ * @PCM_MSG_SG_STATUS: Element containing a virtio_snd_pcm_status structure. ++ * @PCM_MSG_SG_DATA: The first element containing a data buffer. ++ */ ++enum pcm_msg_sg_index { ++ PCM_MSG_SG_XFER = 0, ++ PCM_MSG_SG_STATUS, ++ PCM_MSG_SG_DATA ++}; ++ ++/** ++ * virtsnd_pcm_sg_num() - Count the number of sg-elements required to represent ++ * vmalloc'ed buffer. ++ * @data: Pointer to vmalloc'ed buffer. ++ * @length: Buffer size. ++ * ++ * Context: Any context. ++ * Return: Number of physically contiguous parts in the @data. ++ */ ++static int virtsnd_pcm_sg_num(u8 *data, unsigned int length) ++{ ++ phys_addr_t sg_address; ++ unsigned int sg_length; ++ int num = 0; ++ ++ while (length) { ++ struct page *pg = vmalloc_to_page(data); ++ phys_addr_t pg_address = page_to_phys(pg); ++ size_t pg_length; ++ ++ pg_length = PAGE_SIZE - offset_in_page(data); ++ if (pg_length > length) ++ pg_length = length; ++ ++ if (!num || sg_address + sg_length != pg_address) { ++ sg_address = pg_address; ++ sg_length = pg_length; ++ num++; ++ } else { ++ sg_length += pg_length; ++ } ++ ++ data += pg_length; ++ length -= pg_length; ++ } ++ ++ return num; ++} ++ ++/** ++ * virtsnd_pcm_sg_from() - Build sg-list from vmalloc'ed buffer. ++ * @sgs: Preallocated sg-list to populate. ++ * @nsgs: The maximum number of elements in the @sgs. ++ * @data: Pointer to vmalloc'ed buffer. ++ * @length: Buffer size. ++ * ++ * Splits the buffer into physically contiguous parts and makes an sg-list of ++ * such parts. ++ * ++ * Context: Any context. ++ */ ++static void virtsnd_pcm_sg_from(struct scatterlist *sgs, int nsgs, u8 *data, ++ unsigned int length) ++{ ++ int idx = -1; ++ ++ while (length) { ++ struct page *pg = vmalloc_to_page(data); ++ size_t pg_length; ++ ++ pg_length = PAGE_SIZE - offset_in_page(data); ++ if (pg_length > length) ++ pg_length = length; ++ ++ if (idx == -1 || ++ sg_phys(&sgs[idx]) + sgs[idx].length != page_to_phys(pg)) { ++ if (idx + 1 == nsgs) ++ break; ++ sg_set_page(&sgs[++idx], pg, pg_length, ++ offset_in_page(data)); ++ } else { ++ sgs[idx].length += pg_length; ++ } ++ ++ data += pg_length; ++ length -= pg_length; ++ } ++ ++ sg_mark_end(&sgs[idx]); ++} ++ ++/** ++ * virtsnd_pcm_msg_alloc() - Allocate I/O messages. ++ * @vss: VirtIO PCM substream. ++ * @periods: Current number of periods. ++ * @period_bytes: Current period size in bytes. ++ * ++ * The function slices the buffer into @periods parts (each with the size of ++ * @period_bytes), and creates @periods corresponding I/O messages. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -ENOMEM on failure. ++ */ ++int virtsnd_pcm_msg_alloc(struct virtio_pcm_substream *vss, ++ unsigned int periods, unsigned int period_bytes) ++{ ++ struct snd_pcm_runtime *runtime = vss->substream->runtime; ++ unsigned int i; ++ ++ vss->msgs = kcalloc(periods, sizeof(*vss->msgs), GFP_KERNEL); ++ if (!vss->msgs) ++ return -ENOMEM; ++ ++ vss->nmsgs = periods; ++ ++ for (i = 0; i < periods; ++i) { ++ u8 *data = runtime->dma_area + period_bytes * i; ++ int sg_num = virtsnd_pcm_sg_num(data, period_bytes); ++ struct virtio_pcm_msg *msg; ++ ++ msg = kzalloc(sizeof(*msg) + sizeof(*msg->sgs) * (sg_num + 2), ++ GFP_KERNEL); ++ if (!msg) ++ return -ENOMEM; ++ ++ msg->substream = vss; ++ sg_init_one(&msg->sgs[PCM_MSG_SG_XFER], &msg->xfer, ++ sizeof(msg->xfer)); ++ sg_init_one(&msg->sgs[PCM_MSG_SG_STATUS], &msg->status, ++ sizeof(msg->status)); ++ msg->length = period_bytes; ++ virtsnd_pcm_sg_from(&msg->sgs[PCM_MSG_SG_DATA], sg_num, data, ++ period_bytes); ++ ++ vss->msgs[i] = msg; ++ } ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_msg_free() - Free all allocated I/O messages. ++ * @vss: VirtIO PCM substream. ++ * ++ * Context: Any context. ++ */ ++void virtsnd_pcm_msg_free(struct virtio_pcm_substream *vss) ++{ ++ unsigned int i; ++ ++ for (i = 0; vss->msgs && i < vss->nmsgs; ++i) ++ kfree(vss->msgs[i]); ++ kfree(vss->msgs); ++ ++ vss->msgs = NULL; ++ vss->nmsgs = 0; ++} ++ ++/** ++ * virtsnd_pcm_msg_send() - Send asynchronous I/O messages. ++ * @vss: VirtIO PCM substream. ++ * ++ * All messages are organized in an ordered circular list. Each time the ++ * function is called, all currently non-enqueued messages are added to the ++ * virtqueue. For this, the function keeps track of two values: ++ * ++ * msg_last_enqueued = index of the last enqueued message, ++ * msg_count = # of pending messages in the virtqueue. ++ * ++ * Context: Any context. Expects the tx/rx queue and the VirtIO substream ++ * spinlocks to be held by caller. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_pcm_msg_send(struct virtio_pcm_substream *vss) ++{ ++ struct snd_pcm_runtime *runtime = vss->substream->runtime; ++ struct virtio_snd *snd = vss->snd; ++ struct virtio_device *vdev = snd->vdev; ++ struct virtqueue *vqueue = virtsnd_pcm_queue(vss)->vqueue; ++ int i; ++ int n; ++ bool notify = false; ++ ++ i = (vss->msg_last_enqueued + 1) % runtime->periods; ++ n = runtime->periods - vss->msg_count; ++ ++ for (; n; --n, i = (i + 1) % runtime->periods) { ++ struct virtio_pcm_msg *msg = vss->msgs[i]; ++ struct scatterlist *psgs[] = { ++ &msg->sgs[PCM_MSG_SG_XFER], ++ &msg->sgs[PCM_MSG_SG_DATA], ++ &msg->sgs[PCM_MSG_SG_STATUS] ++ }; ++ int rc; ++ ++ msg->xfer.stream_id = cpu_to_le32(vss->sid); ++ memset(&msg->status, 0, sizeof(msg->status)); ++ ++ if (vss->direction == SNDRV_PCM_STREAM_PLAYBACK) ++ rc = virtqueue_add_sgs(vqueue, psgs, 2, 1, msg, ++ GFP_ATOMIC); ++ else ++ rc = virtqueue_add_sgs(vqueue, psgs, 1, 2, msg, ++ GFP_ATOMIC); ++ ++ if (rc) { ++ dev_err(&vdev->dev, ++ "SID %u: failed to send I/O message\n", ++ vss->sid); ++ return rc; ++ } ++ ++ vss->msg_last_enqueued = i; ++ vss->msg_count++; ++ } ++ ++ if (!(vss->features & (1U << VIRTIO_SND_PCM_F_MSG_POLLING))) ++ notify = virtqueue_kick_prepare(vqueue); ++ ++ if (notify) ++ virtqueue_notify(vqueue); ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_msg_pending_num() - Returns the number of pending I/O messages. ++ * @vss: VirtIO substream. ++ * ++ * Context: Any context. ++ * Return: Number of messages. ++ */ ++unsigned int virtsnd_pcm_msg_pending_num(struct virtio_pcm_substream *vss) ++{ ++ unsigned int num; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&vss->lock, flags); ++ num = vss->msg_count; ++ spin_unlock_irqrestore(&vss->lock, flags); ++ ++ return num; ++} ++ ++/** ++ * virtsnd_pcm_msg_complete() - Complete an I/O message. ++ * @msg: I/O message. ++ * @written_bytes: Number of bytes written to the message. ++ * ++ * Completion of the message means the elapsed period. If transmission is ++ * allowed, then each completed message is immediately placed back at the end ++ * of the queue. ++ * ++ * For the playback substream, @written_bytes is equal to sizeof(msg->status). ++ * ++ * For the capture substream, @written_bytes is equal to sizeof(msg->status) ++ * plus the number of captured bytes. ++ * ++ * Context: Interrupt context. Takes and releases the VirtIO substream spinlock. ++ */ ++static void virtsnd_pcm_msg_complete(struct virtio_pcm_msg *msg, ++ size_t written_bytes) ++{ ++ struct virtio_pcm_substream *vss = msg->substream; ++ ++ /* ++ * hw_ptr always indicates the buffer position of the first I/O message ++ * in the virtqueue. Therefore, on each completion of an I/O message, ++ * the hw_ptr value is unconditionally advanced. ++ */ ++ spin_lock(&vss->lock); ++ /* ++ * If the capture substream returned an incorrect status, then just ++ * increase the hw_ptr by the message size. ++ */ ++ if (vss->direction == SNDRV_PCM_STREAM_PLAYBACK || ++ written_bytes <= sizeof(msg->status)) ++ vss->hw_ptr += msg->length; ++ else ++ vss->hw_ptr += written_bytes - sizeof(msg->status); ++ ++ if (vss->hw_ptr >= vss->buffer_bytes) ++ vss->hw_ptr -= vss->buffer_bytes; ++ ++ vss->xfer_xrun = false; ++ vss->msg_count--; ++ ++ if (vss->xfer_enabled) { ++ struct snd_pcm_runtime *runtime = vss->substream->runtime; ++ ++ runtime->delay = ++ bytes_to_frames(runtime, ++ le32_to_cpu(msg->status.latency_bytes)); ++ ++ schedule_work(&vss->elapsed_period); ++ ++ virtsnd_pcm_msg_send(vss); ++ } else if (!vss->msg_count) { ++ wake_up_all(&vss->msg_empty); ++ } ++ spin_unlock(&vss->lock); ++} ++ ++/** ++ * virtsnd_pcm_notify_cb() - Process all completed I/O messages. ++ * @queue: Underlying tx/rx virtqueue. ++ * ++ * Context: Interrupt context. Takes and releases the tx/rx queue spinlock. ++ */ ++static inline void virtsnd_pcm_notify_cb(struct virtio_snd_queue *queue) ++{ ++ struct virtio_pcm_msg *msg; ++ u32 written_bytes; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&queue->lock, flags); ++ do { ++ virtqueue_disable_cb(queue->vqueue); ++ while ((msg = virtqueue_get_buf(queue->vqueue, &written_bytes))) ++ virtsnd_pcm_msg_complete(msg, written_bytes); ++ if (unlikely(virtqueue_is_broken(queue->vqueue))) ++ break; ++ } while (!virtqueue_enable_cb(queue->vqueue)); ++ spin_unlock_irqrestore(&queue->lock, flags); ++} ++ ++/** ++ * virtsnd_pcm_tx_notify_cb() - Process all completed TX messages. ++ * @vqueue: Underlying tx virtqueue. ++ * ++ * Context: Interrupt context. ++ */ ++void virtsnd_pcm_tx_notify_cb(struct virtqueue *vqueue) ++{ ++ struct virtio_snd *snd = vqueue->vdev->priv; ++ ++ virtsnd_pcm_notify_cb(virtsnd_tx_queue(snd)); ++} ++ ++/** ++ * virtsnd_pcm_rx_notify_cb() - Process all completed RX messages. ++ * @vqueue: Underlying rx virtqueue. ++ * ++ * Context: Interrupt context. ++ */ ++void virtsnd_pcm_rx_notify_cb(struct virtqueue *vqueue) ++{ ++ struct virtio_snd *snd = vqueue->vdev->priv; ++ ++ virtsnd_pcm_notify_cb(virtsnd_rx_queue(snd)); ++} ++ ++/** ++ * virtsnd_pcm_ctl_msg_alloc() - Allocate and initialize the PCM device control ++ * message for the specified substream. ++ * @vss: VirtIO PCM substream. ++ * @command: Control request code (VIRTIO_SND_R_PCM_XXX). ++ * @gfp: Kernel flags for memory allocation. ++ * ++ * Context: Any context. May sleep if @gfp flags permit. ++ * Return: Allocated message on success, NULL on failure. ++ */ ++struct virtio_snd_msg * ++virtsnd_pcm_ctl_msg_alloc(struct virtio_pcm_substream *vss, ++ unsigned int command, gfp_t gfp) ++{ ++ size_t request_size = sizeof(struct virtio_snd_pcm_hdr); ++ size_t response_size = sizeof(struct virtio_snd_hdr); ++ struct virtio_snd_msg *msg; ++ ++ switch (command) { ++ case VIRTIO_SND_R_PCM_SET_PARAMS: ++ request_size = sizeof(struct virtio_snd_pcm_set_params); ++ break; ++ } ++ ++ msg = virtsnd_ctl_msg_alloc(request_size, response_size, gfp); ++ if (msg) { ++ struct virtio_snd_pcm_hdr *hdr = virtsnd_ctl_msg_request(msg); ++ ++ hdr->hdr.code = cpu_to_le32(command); ++ hdr->stream_id = cpu_to_le32(vss->sid); ++ } ++ ++ return msg; ++} +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0005-ALSA-virtio-PCM-substream-operators.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0005-ALSA-virtio-PCM-substream-operators.patch new file mode 100644 index 00000000..97bf9c79 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0005-ALSA-virtio-PCM-substream-operators.patch @@ -0,0 +1,527 @@ +From a0208cd5ae0bf1fd1ec15b7153c06c976483a68a Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:06 +0100 +Subject: [PATCH 5/9] ALSA: virtio: PCM substream operators + +Introduce the operators required for the operation of substreams. + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-7-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/Makefile | 3 +- + sound/virtio/virtio_pcm.c | 2 + + sound/virtio/virtio_pcm.h | 5 + + sound/virtio/virtio_pcm_ops.c | 445 ++++++++++++++++++++++++++++++++++ + 4 files changed, 454 insertions(+), 1 deletion(-) + create mode 100644 sound/virtio/virtio_pcm_ops.c + +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +index 626af3cc3ed7..34493226793f 100644 +--- a/sound/virtio/Makefile ++++ b/sound/virtio/Makefile +@@ -6,5 +6,6 @@ virtio_snd-objs := \ + virtio_card.o \ + virtio_ctl_msg.o \ + virtio_pcm.o \ +- virtio_pcm_msg.o ++ virtio_pcm_msg.o \ ++ virtio_pcm_ops.o + +diff --git a/sound/virtio/virtio_pcm.c b/sound/virtio/virtio_pcm.c +index 2dcd763efa29..c10d91fff2fb 100644 +--- a/sound/virtio/virtio_pcm.c ++++ b/sound/virtio/virtio_pcm.c +@@ -470,6 +470,8 @@ int virtsnd_pcm_build_devs(struct virtio_snd *snd) + + for (kss = ks->substream; kss; kss = kss->next) + vs->substreams[kss->number]->substream = kss; ++ ++ snd_pcm_set_ops(vpcm->pcm, i, &virtsnd_pcm_ops); + } + + snd_pcm_set_managed_buffer_all(vpcm->pcm, +diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h +index 6722f1139666..efd0228746cf 100644 +--- a/sound/virtio/virtio_pcm.h ++++ b/sound/virtio/virtio_pcm.h +@@ -29,6 +29,8 @@ struct virtio_pcm_msg; + * @hw_ptr: Substream hardware pointer value in bytes [0 ... buffer_bytes). + * @xfer_enabled: Data transfer state (0 - off, 1 - on). + * @xfer_xrun: Data underflow/overflow state (0 - no xrun, 1 - xrun). ++ * @stopped: True if the substream is stopped and must be released on the device ++ * side. + * @msgs: Allocated I/O messages. + * @nmsgs: Number of allocated I/O messages. + * @msg_last_enqueued: Index of the last I/O message added to the virtqueue. +@@ -49,6 +51,7 @@ struct virtio_pcm_substream { + size_t hw_ptr; + bool xfer_enabled; + bool xfer_xrun; ++ bool stopped; + struct virtio_pcm_msg **msgs; + unsigned int nmsgs; + int msg_last_enqueued; +@@ -80,6 +83,8 @@ struct virtio_pcm { + struct virtio_pcm_stream streams[SNDRV_PCM_STREAM_LAST + 1]; + }; + ++extern const struct snd_pcm_ops virtsnd_pcm_ops; ++ + int virtsnd_pcm_validate(struct virtio_device *vdev); + + int virtsnd_pcm_parse_cfg(struct virtio_snd *snd); +diff --git a/sound/virtio/virtio_pcm_ops.c b/sound/virtio/virtio_pcm_ops.c +new file mode 100644 +index 000000000000..0682a2df6c8c +--- /dev/null ++++ b/sound/virtio/virtio_pcm_ops.c +@@ -0,0 +1,445 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <sound/pcm_params.h> ++ ++#include "virtio_card.h" ++ ++/* ++ * I/O messages lifetime ++ * --------------------- ++ * ++ * Allocation: ++ * Messages are initially allocated in the ops->hw_params() after the size and ++ * number of periods have been successfully negotiated. ++ * ++ * Freeing: ++ * Messages can be safely freed after the queue has been successfully flushed ++ * (RELEASE command in the ops->sync_stop()) and the ops->hw_free() has been ++ * called. ++ * ++ * When the substream stops, the ops->sync_stop() waits until the device has ++ * completed all pending messages. This wait can be interrupted either by a ++ * signal or due to a timeout. In this case, the device can still access ++ * messages even after calling ops->hw_free(). It can also issue an interrupt, ++ * and the interrupt handler will also try to access message structures. ++ * ++ * Therefore, freeing of already allocated messages occurs: ++ * ++ * - in ops->hw_params(), if this operator was called several times in a row, ++ * or if ops->hw_free() failed to free messages previously; ++ * ++ * - in ops->hw_free(), if the queue has been successfully flushed; ++ * ++ * - in dev->release(). ++ */ ++ ++/* Map for converting ALSA format to VirtIO format. */ ++struct virtsnd_a2v_format { ++ snd_pcm_format_t alsa_bit; ++ unsigned int vio_bit; ++}; ++ ++static const struct virtsnd_a2v_format g_a2v_format_map[] = { ++ { SNDRV_PCM_FORMAT_IMA_ADPCM, VIRTIO_SND_PCM_FMT_IMA_ADPCM }, ++ { SNDRV_PCM_FORMAT_MU_LAW, VIRTIO_SND_PCM_FMT_MU_LAW }, ++ { SNDRV_PCM_FORMAT_A_LAW, VIRTIO_SND_PCM_FMT_A_LAW }, ++ { SNDRV_PCM_FORMAT_S8, VIRTIO_SND_PCM_FMT_S8 }, ++ { SNDRV_PCM_FORMAT_U8, VIRTIO_SND_PCM_FMT_U8 }, ++ { SNDRV_PCM_FORMAT_S16_LE, VIRTIO_SND_PCM_FMT_S16 }, ++ { SNDRV_PCM_FORMAT_U16_LE, VIRTIO_SND_PCM_FMT_U16 }, ++ { SNDRV_PCM_FORMAT_S18_3LE, VIRTIO_SND_PCM_FMT_S18_3 }, ++ { SNDRV_PCM_FORMAT_U18_3LE, VIRTIO_SND_PCM_FMT_U18_3 }, ++ { SNDRV_PCM_FORMAT_S20_3LE, VIRTIO_SND_PCM_FMT_S20_3 }, ++ { SNDRV_PCM_FORMAT_U20_3LE, VIRTIO_SND_PCM_FMT_U20_3 }, ++ { SNDRV_PCM_FORMAT_S24_3LE, VIRTIO_SND_PCM_FMT_S24_3 }, ++ { SNDRV_PCM_FORMAT_U24_3LE, VIRTIO_SND_PCM_FMT_U24_3 }, ++ { SNDRV_PCM_FORMAT_S20_LE, VIRTIO_SND_PCM_FMT_S20 }, ++ { SNDRV_PCM_FORMAT_U20_LE, VIRTIO_SND_PCM_FMT_U20 }, ++ { SNDRV_PCM_FORMAT_S24_LE, VIRTIO_SND_PCM_FMT_S24 }, ++ { SNDRV_PCM_FORMAT_U24_LE, VIRTIO_SND_PCM_FMT_U24 }, ++ { SNDRV_PCM_FORMAT_S32_LE, VIRTIO_SND_PCM_FMT_S32 }, ++ { SNDRV_PCM_FORMAT_U32_LE, VIRTIO_SND_PCM_FMT_U32 }, ++ { SNDRV_PCM_FORMAT_FLOAT_LE, VIRTIO_SND_PCM_FMT_FLOAT }, ++ { SNDRV_PCM_FORMAT_FLOAT64_LE, VIRTIO_SND_PCM_FMT_FLOAT64 }, ++ { SNDRV_PCM_FORMAT_DSD_U8, VIRTIO_SND_PCM_FMT_DSD_U8 }, ++ { SNDRV_PCM_FORMAT_DSD_U16_LE, VIRTIO_SND_PCM_FMT_DSD_U16 }, ++ { SNDRV_PCM_FORMAT_DSD_U32_LE, VIRTIO_SND_PCM_FMT_DSD_U32 }, ++ { SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE, ++ VIRTIO_SND_PCM_FMT_IEC958_SUBFRAME } ++}; ++ ++/* Map for converting ALSA frame rate to VirtIO frame rate. */ ++struct virtsnd_a2v_rate { ++ unsigned int rate; ++ unsigned int vio_bit; ++}; ++ ++static const struct virtsnd_a2v_rate g_a2v_rate_map[] = { ++ { 5512, VIRTIO_SND_PCM_RATE_5512 }, ++ { 8000, VIRTIO_SND_PCM_RATE_8000 }, ++ { 11025, VIRTIO_SND_PCM_RATE_11025 }, ++ { 16000, VIRTIO_SND_PCM_RATE_16000 }, ++ { 22050, VIRTIO_SND_PCM_RATE_22050 }, ++ { 32000, VIRTIO_SND_PCM_RATE_32000 }, ++ { 44100, VIRTIO_SND_PCM_RATE_44100 }, ++ { 48000, VIRTIO_SND_PCM_RATE_48000 }, ++ { 64000, VIRTIO_SND_PCM_RATE_64000 }, ++ { 88200, VIRTIO_SND_PCM_RATE_88200 }, ++ { 96000, VIRTIO_SND_PCM_RATE_96000 }, ++ { 176400, VIRTIO_SND_PCM_RATE_176400 }, ++ { 192000, VIRTIO_SND_PCM_RATE_192000 } ++}; ++ ++static int virtsnd_pcm_sync_stop(struct snd_pcm_substream *substream); ++ ++/** ++ * virtsnd_pcm_open() - Open the PCM substream. ++ * @substream: Kernel ALSA substream. ++ * ++ * Context: Process context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_pcm_open(struct snd_pcm_substream *substream) ++{ ++ struct virtio_pcm *vpcm = snd_pcm_substream_chip(substream); ++ struct virtio_pcm_stream *vs = &vpcm->streams[substream->stream]; ++ struct virtio_pcm_substream *vss = vs->substreams[substream->number]; ++ ++ substream->runtime->hw = vss->hw; ++ substream->private_data = vss; ++ ++ snd_pcm_hw_constraint_integer(substream->runtime, ++ SNDRV_PCM_HW_PARAM_PERIODS); ++ ++ vss->stopped = !!virtsnd_pcm_msg_pending_num(vss); ++ ++ /* ++ * If the substream has already been used, then the I/O queue may be in ++ * an invalid state. Just in case, we do a check and try to return the ++ * queue to its original state, if necessary. ++ */ ++ return virtsnd_pcm_sync_stop(substream); ++} ++ ++/** ++ * virtsnd_pcm_close() - Close the PCM substream. ++ * @substream: Kernel ALSA substream. ++ * ++ * Context: Process context. ++ * Return: 0. ++ */ ++static int virtsnd_pcm_close(struct snd_pcm_substream *substream) ++{ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_dev_set_params() - Set the parameters of the PCM substream on ++ * the device side. ++ * @vss: VirtIO PCM substream. ++ * @buffer_bytes: Size of the hardware buffer. ++ * @period_bytes: Size of the hardware period. ++ * @channels: Selected number of channels. ++ * @format: Selected sample format (SNDRV_PCM_FORMAT_XXX). ++ * @rate: Selected frame rate. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_pcm_dev_set_params(struct virtio_pcm_substream *vss, ++ unsigned int buffer_bytes, ++ unsigned int period_bytes, ++ unsigned int channels, ++ snd_pcm_format_t format, ++ unsigned int rate) ++{ ++ struct virtio_snd_msg *msg; ++ struct virtio_snd_pcm_set_params *request; ++ unsigned int i; ++ int vformat = -1; ++ int vrate = -1; ++ ++ for (i = 0; i < ARRAY_SIZE(g_a2v_format_map); ++i) ++ if (g_a2v_format_map[i].alsa_bit == format) { ++ vformat = g_a2v_format_map[i].vio_bit; ++ ++ break; ++ } ++ ++ for (i = 0; i < ARRAY_SIZE(g_a2v_rate_map); ++i) ++ if (g_a2v_rate_map[i].rate == rate) { ++ vrate = g_a2v_rate_map[i].vio_bit; ++ ++ break; ++ } ++ ++ if (vformat == -1 || vrate == -1) ++ return -EINVAL; ++ ++ msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_SET_PARAMS, ++ GFP_KERNEL); ++ if (!msg) ++ return -ENOMEM; ++ ++ request = virtsnd_ctl_msg_request(msg); ++ request->buffer_bytes = cpu_to_le32(buffer_bytes); ++ request->period_bytes = cpu_to_le32(period_bytes); ++ request->channels = channels; ++ request->format = vformat; ++ request->rate = vrate; ++ ++ if (vss->features & (1U << VIRTIO_SND_PCM_F_MSG_POLLING)) ++ request->features |= ++ cpu_to_le32(1U << VIRTIO_SND_PCM_F_MSG_POLLING); ++ ++ if (vss->features & (1U << VIRTIO_SND_PCM_F_EVT_XRUNS)) ++ request->features |= ++ cpu_to_le32(1U << VIRTIO_SND_PCM_F_EVT_XRUNS); ++ ++ return virtsnd_ctl_msg_send_sync(vss->snd, msg); ++} ++ ++/** ++ * virtsnd_pcm_hw_params() - Set the parameters of the PCM substream. ++ * @substream: Kernel ALSA substream. ++ * @hw_params: Hardware parameters. ++ * ++ * Context: Process context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_pcm_hw_params(struct snd_pcm_substream *substream, ++ struct snd_pcm_hw_params *hw_params) ++{ ++ struct virtio_pcm_substream *vss = snd_pcm_substream_chip(substream); ++ struct virtio_device *vdev = vss->snd->vdev; ++ int rc; ++ ++ if (virtsnd_pcm_msg_pending_num(vss)) { ++ dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", ++ vss->sid); ++ return -EBADFD; ++ } ++ ++ rc = virtsnd_pcm_dev_set_params(vss, params_buffer_bytes(hw_params), ++ params_period_bytes(hw_params), ++ params_channels(hw_params), ++ params_format(hw_params), ++ params_rate(hw_params)); ++ if (rc) ++ return rc; ++ ++ /* ++ * Free previously allocated messages if ops->hw_params() is called ++ * several times in a row, or if ops->hw_free() failed to free messages. ++ */ ++ virtsnd_pcm_msg_free(vss); ++ ++ return virtsnd_pcm_msg_alloc(vss, params_periods(hw_params), ++ params_period_bytes(hw_params)); ++} ++ ++/** ++ * virtsnd_pcm_hw_free() - Reset the parameters of the PCM substream. ++ * @substream: Kernel ALSA substream. ++ * ++ * Context: Process context. ++ * Return: 0 ++ */ ++static int virtsnd_pcm_hw_free(struct snd_pcm_substream *substream) ++{ ++ struct virtio_pcm_substream *vss = snd_pcm_substream_chip(substream); ++ ++ /* If the queue is flushed, we can safely free the messages here. */ ++ if (!virtsnd_pcm_msg_pending_num(vss)) ++ virtsnd_pcm_msg_free(vss); ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_prepare() - Prepare the PCM substream. ++ * @substream: Kernel ALSA substream. ++ * ++ * Context: Process context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_pcm_prepare(struct snd_pcm_substream *substream) ++{ ++ struct virtio_pcm_substream *vss = snd_pcm_substream_chip(substream); ++ struct virtio_device *vdev = vss->snd->vdev; ++ struct virtio_snd_msg *msg; ++ ++ if (virtsnd_pcm_msg_pending_num(vss)) { ++ dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", ++ vss->sid); ++ return -EBADFD; ++ } ++ ++ vss->buffer_bytes = snd_pcm_lib_buffer_bytes(substream); ++ vss->hw_ptr = 0; ++ vss->xfer_xrun = false; ++ vss->msg_last_enqueued = -1; ++ vss->msg_count = 0; ++ ++ msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_PREPARE, ++ GFP_KERNEL); ++ if (!msg) ++ return -ENOMEM; ++ ++ return virtsnd_ctl_msg_send_sync(vss->snd, msg); ++} ++ ++/** ++ * virtsnd_pcm_trigger() - Process command for the PCM substream. ++ * @substream: Kernel ALSA substream. ++ * @command: Substream command (SNDRV_PCM_TRIGGER_XXX). ++ * ++ * Context: Any context. Takes and releases the VirtIO substream spinlock. ++ * May take and release the tx/rx queue spinlock. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_pcm_trigger(struct snd_pcm_substream *substream, int command) ++{ ++ struct virtio_pcm_substream *vss = snd_pcm_substream_chip(substream); ++ struct virtio_snd *snd = vss->snd; ++ struct virtio_snd_queue *queue; ++ struct virtio_snd_msg *msg; ++ unsigned long flags; ++ int rc; ++ ++ switch (command) { ++ case SNDRV_PCM_TRIGGER_START: ++ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: ++ queue = virtsnd_pcm_queue(vss); ++ ++ spin_lock_irqsave(&queue->lock, flags); ++ spin_lock(&vss->lock); ++ rc = virtsnd_pcm_msg_send(vss); ++ if (!rc) ++ vss->xfer_enabled = true; ++ spin_unlock(&vss->lock); ++ spin_unlock_irqrestore(&queue->lock, flags); ++ if (rc) ++ return rc; ++ ++ msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_START, ++ GFP_KERNEL); ++ if (!msg) { ++ spin_lock_irqsave(&vss->lock, flags); ++ vss->xfer_enabled = false; ++ spin_unlock_irqrestore(&vss->lock, flags); ++ ++ return -ENOMEM; ++ } ++ ++ return virtsnd_ctl_msg_send_sync(snd, msg); ++ case SNDRV_PCM_TRIGGER_STOP: ++ vss->stopped = true; ++ fallthrough; ++ case SNDRV_PCM_TRIGGER_PAUSE_PUSH: ++ spin_lock_irqsave(&vss->lock, flags); ++ vss->xfer_enabled = false; ++ spin_unlock_irqrestore(&vss->lock, flags); ++ ++ msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_STOP, ++ GFP_KERNEL); ++ if (!msg) ++ return -ENOMEM; ++ ++ return virtsnd_ctl_msg_send_sync(snd, msg); ++ default: ++ return -EINVAL; ++ } ++} ++ ++/** ++ * virtsnd_pcm_sync_stop() - Synchronous PCM substream stop. ++ * @substream: Kernel ALSA substream. ++ * ++ * The function can be called both from the upper level or from the driver ++ * itself. ++ * ++ * Context: Process context. Takes and releases the VirtIO substream spinlock. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_pcm_sync_stop(struct snd_pcm_substream *substream) ++{ ++ struct virtio_pcm_substream *vss = snd_pcm_substream_chip(substream); ++ struct virtio_snd *snd = vss->snd; ++ struct virtio_snd_msg *msg; ++ unsigned int js = msecs_to_jiffies(virtsnd_msg_timeout_ms); ++ int rc; ++ ++ cancel_work_sync(&vss->elapsed_period); ++ ++ if (!vss->stopped) ++ return 0; ++ ++ msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_RELEASE, ++ GFP_KERNEL); ++ if (!msg) ++ return -ENOMEM; ++ ++ rc = virtsnd_ctl_msg_send_sync(snd, msg); ++ if (rc) ++ return rc; ++ ++ /* ++ * The spec states that upon receipt of the RELEASE command "the device ++ * MUST complete all pending I/O messages for the specified stream ID". ++ * Thus, we consider the absence of I/O messages in the queue as an ++ * indication that the substream has been released. ++ */ ++ rc = wait_event_interruptible_timeout(vss->msg_empty, ++ !virtsnd_pcm_msg_pending_num(vss), ++ js); ++ if (rc <= 0) { ++ dev_warn(&snd->vdev->dev, "SID %u: failed to flush I/O queue\n", ++ vss->sid); ++ ++ return !rc ? -ETIMEDOUT : rc; ++ } ++ ++ vss->stopped = false; ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_pcm_pointer() - Get the current hardware position for the PCM ++ * substream. ++ * @substream: Kernel ALSA substream. ++ * ++ * Context: Any context. Takes and releases the VirtIO substream spinlock. ++ * Return: Hardware position in frames inside [0 ... buffer_size) range. ++ */ ++static snd_pcm_uframes_t ++virtsnd_pcm_pointer(struct snd_pcm_substream *substream) ++{ ++ struct virtio_pcm_substream *vss = snd_pcm_substream_chip(substream); ++ snd_pcm_uframes_t hw_ptr = SNDRV_PCM_POS_XRUN; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&vss->lock, flags); ++ if (!vss->xfer_xrun) ++ hw_ptr = bytes_to_frames(substream->runtime, vss->hw_ptr); ++ spin_unlock_irqrestore(&vss->lock, flags); ++ ++ return hw_ptr; ++} ++ ++/* PCM substream operators map. */ ++const struct snd_pcm_ops virtsnd_pcm_ops = { ++ .open = virtsnd_pcm_open, ++ .close = virtsnd_pcm_close, ++ .ioctl = snd_pcm_lib_ioctl, ++ .hw_params = virtsnd_pcm_hw_params, ++ .hw_free = virtsnd_pcm_hw_free, ++ .prepare = virtsnd_pcm_prepare, ++ .trigger = virtsnd_pcm_trigger, ++ .sync_stop = virtsnd_pcm_sync_stop, ++ .pointer = virtsnd_pcm_pointer, ++}; +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0006-ALSA-virtio-introduce-jack-support.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0006-ALSA-virtio-introduce-jack-support.patch new file mode 100644 index 00000000..831a014f --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0006-ALSA-virtio-introduce-jack-support.patch @@ -0,0 +1,353 @@ +From 7ed6e645e3d37217f0ac6536c83575956a5a8c1d Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:07 +0100 +Subject: [PATCH 6/9] ALSA: virtio: introduce jack support + +Enumerate all available jacks and create ALSA controls. + +At the moment jacks have a simple implementation and can only be used +to receive notifications about a plugged in/out device. + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-8-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/Makefile | 1 + + sound/virtio/virtio_card.c | 14 +++ + sound/virtio/virtio_card.h | 12 ++ + sound/virtio/virtio_jack.c | 233 +++++++++++++++++++++++++++++++++++++ + 4 files changed, 260 insertions(+) + create mode 100644 sound/virtio/virtio_jack.c + +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +index 34493226793f..09f485291285 100644 +--- a/sound/virtio/Makefile ++++ b/sound/virtio/Makefile +@@ -5,6 +5,7 @@ obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o + virtio_snd-objs := \ + virtio_card.o \ + virtio_ctl_msg.o \ ++ virtio_jack.o \ + virtio_pcm.o \ + virtio_pcm_msg.o \ + virtio_pcm_ops.o +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index 57b9b7f3a9c0..89bd66c1256e 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -56,6 +56,10 @@ static void virtsnd_event_dispatch(struct virtio_snd *snd, + struct virtio_snd_event *event) + { + switch (le32_to_cpu(event->hdr.code)) { ++ case VIRTIO_SND_EVT_JACK_CONNECTED: ++ case VIRTIO_SND_EVT_JACK_DISCONNECTED: ++ virtsnd_jack_event(snd, event); ++ break; + case VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED: + case VIRTIO_SND_EVT_PCM_XRUN: + virtsnd_pcm_event(snd, event); +@@ -219,10 +223,20 @@ static int virtsnd_build_devs(struct virtio_snd *snd) + VIRTIO_SND_CARD_NAME " at %s/%s", + dev_name(dev->parent), dev_name(dev)); + ++ rc = virtsnd_jack_parse_cfg(snd); ++ if (rc) ++ return rc; ++ + rc = virtsnd_pcm_parse_cfg(snd); + if (rc) + return rc; + ++ if (snd->njacks) { ++ rc = virtsnd_jack_build_devs(snd); ++ if (rc) ++ return rc; ++ } ++ + if (snd->nsubstreams) { + rc = virtsnd_pcm_build_devs(snd); + if (rc) +diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h +index c43f9744d362..f154313c79fd 100644 +--- a/sound/virtio/virtio_card.h ++++ b/sound/virtio/virtio_card.h +@@ -18,6 +18,7 @@ + #define VIRTIO_SND_CARD_NAME "VirtIO SoundCard" + #define VIRTIO_SND_PCM_NAME "VirtIO PCM" + ++struct virtio_jack; + struct virtio_pcm_substream; + + /** +@@ -38,6 +39,8 @@ struct virtio_snd_queue { + * @ctl_msgs: Pending control request list. + * @event_msgs: Device events. + * @pcm_list: VirtIO PCM device list. ++ * @jacks: VirtIO jacks. ++ * @njacks: Number of jacks. + * @substreams: VirtIO PCM substreams. + * @nsubstreams: Number of PCM substreams. + */ +@@ -48,6 +51,8 @@ struct virtio_snd { + struct list_head ctl_msgs; + struct virtio_snd_event *event_msgs; + struct list_head pcm_list; ++ struct virtio_jack *jacks; ++ u32 njacks; + struct virtio_pcm_substream *substreams; + u32 nsubstreams; + }; +@@ -88,4 +93,11 @@ virtsnd_pcm_queue(struct virtio_pcm_substream *vss) + return virtsnd_rx_queue(vss->snd); + } + ++int virtsnd_jack_parse_cfg(struct virtio_snd *snd); ++ ++int virtsnd_jack_build_devs(struct virtio_snd *snd); ++ ++void virtsnd_jack_event(struct virtio_snd *snd, ++ struct virtio_snd_event *event); ++ + #endif /* VIRTIO_SND_CARD_H */ +diff --git a/sound/virtio/virtio_jack.c b/sound/virtio/virtio_jack.c +new file mode 100644 +index 000000000000..c69f1dcdcc84 +--- /dev/null ++++ b/sound/virtio/virtio_jack.c +@@ -0,0 +1,233 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <linux/virtio_config.h> ++#include <sound/jack.h> ++#include <sound/hda_verbs.h> ++ ++#include "virtio_card.h" ++ ++/** ++ * DOC: Implementation Status ++ * ++ * At the moment jacks have a simple implementation and can only be used to ++ * receive notifications about a plugged in/out device. ++ * ++ * VIRTIO_SND_R_JACK_REMAP ++ * is not supported ++ */ ++ ++/** ++ * struct virtio_jack - VirtIO jack. ++ * @jack: Kernel jack control. ++ * @nid: Functional group node identifier. ++ * @features: Jack virtio feature bit map (1 << VIRTIO_SND_JACK_F_XXX). ++ * @defconf: Pin default configuration value. ++ * @caps: Pin capabilities value. ++ * @connected: Current jack connection status. ++ * @type: Kernel jack type (SND_JACK_XXX). ++ */ ++struct virtio_jack { ++ struct snd_jack *jack; ++ u32 nid; ++ u32 features; ++ u32 defconf; ++ u32 caps; ++ bool connected; ++ int type; ++}; ++ ++/** ++ * virtsnd_jack_get_label() - Get the name string for the jack. ++ * @vjack: VirtIO jack. ++ * ++ * Returns the jack name based on the default pin configuration value (see HDA ++ * specification). ++ * ++ * Context: Any context. ++ * Return: Name string. ++ */ ++static const char *virtsnd_jack_get_label(struct virtio_jack *vjack) ++{ ++ unsigned int defconf = vjack->defconf; ++ unsigned int device = ++ (defconf & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT; ++ unsigned int location = ++ (defconf & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT; ++ ++ switch (device) { ++ case AC_JACK_LINE_OUT: ++ return "Line Out"; ++ case AC_JACK_SPEAKER: ++ return "Speaker"; ++ case AC_JACK_HP_OUT: ++ return "Headphone"; ++ case AC_JACK_CD: ++ return "CD"; ++ case AC_JACK_SPDIF_OUT: ++ case AC_JACK_DIG_OTHER_OUT: ++ if (location == AC_JACK_LOC_HDMI) ++ return "HDMI Out"; ++ else ++ return "SPDIF Out"; ++ case AC_JACK_LINE_IN: ++ return "Line"; ++ case AC_JACK_AUX: ++ return "Aux"; ++ case AC_JACK_MIC_IN: ++ return "Mic"; ++ case AC_JACK_SPDIF_IN: ++ return "SPDIF In"; ++ case AC_JACK_DIG_OTHER_IN: ++ return "Digital In"; ++ default: ++ return "Misc"; ++ } ++} ++ ++/** ++ * virtsnd_jack_get_type() - Get the type for the jack. ++ * @vjack: VirtIO jack. ++ * ++ * Returns the jack type based on the default pin configuration value (see HDA ++ * specification). ++ * ++ * Context: Any context. ++ * Return: SND_JACK_XXX value. ++ */ ++static int virtsnd_jack_get_type(struct virtio_jack *vjack) ++{ ++ unsigned int defconf = vjack->defconf; ++ unsigned int device = ++ (defconf & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT; ++ ++ switch (device) { ++ case AC_JACK_LINE_OUT: ++ case AC_JACK_SPEAKER: ++ return SND_JACK_LINEOUT; ++ case AC_JACK_HP_OUT: ++ return SND_JACK_HEADPHONE; ++ case AC_JACK_SPDIF_OUT: ++ case AC_JACK_DIG_OTHER_OUT: ++ return SND_JACK_AVOUT; ++ case AC_JACK_MIC_IN: ++ return SND_JACK_MICROPHONE; ++ default: ++ return SND_JACK_LINEIN; ++ } ++} ++ ++/** ++ * virtsnd_jack_parse_cfg() - Parse the jack configuration. ++ * @snd: VirtIO sound device. ++ * ++ * This function is called during initial device initialization. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_jack_parse_cfg(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct virtio_snd_jack_info *info; ++ u32 i; ++ int rc; ++ ++ virtio_cread_le(vdev, struct virtio_snd_config, jacks, &snd->njacks); ++ if (!snd->njacks) ++ return 0; ++ ++ snd->jacks = devm_kcalloc(&vdev->dev, snd->njacks, sizeof(*snd->jacks), ++ GFP_KERNEL); ++ if (!snd->jacks) ++ return -ENOMEM; ++ ++ info = kcalloc(snd->njacks, sizeof(*info), GFP_KERNEL); ++ if (!info) ++ return -ENOMEM; ++ ++ rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_JACK_INFO, 0, snd->njacks, ++ sizeof(*info), info); ++ if (rc) ++ goto on_exit; ++ ++ for (i = 0; i < snd->njacks; ++i) { ++ struct virtio_jack *vjack = &snd->jacks[i]; ++ ++ vjack->nid = le32_to_cpu(info[i].hdr.hda_fn_nid); ++ vjack->features = le32_to_cpu(info[i].features); ++ vjack->defconf = le32_to_cpu(info[i].hda_reg_defconf); ++ vjack->caps = le32_to_cpu(info[i].hda_reg_caps); ++ vjack->connected = info[i].connected; ++ } ++ ++on_exit: ++ kfree(info); ++ ++ return rc; ++} ++ ++/** ++ * virtsnd_jack_build_devs() - Build ALSA controls for jacks. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_jack_build_devs(struct virtio_snd *snd) ++{ ++ u32 i; ++ int rc; ++ ++ for (i = 0; i < snd->njacks; ++i) { ++ struct virtio_jack *vjack = &snd->jacks[i]; ++ ++ vjack->type = virtsnd_jack_get_type(vjack); ++ ++ rc = snd_jack_new(snd->card, virtsnd_jack_get_label(vjack), ++ vjack->type, &vjack->jack, true, true); ++ if (rc) ++ return rc; ++ ++ if (vjack->jack) ++ vjack->jack->private_data = vjack; ++ ++ snd_jack_report(vjack->jack, ++ vjack->connected ? vjack->type : 0); ++ } ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_jack_event() - Handle the jack event notification. ++ * @snd: VirtIO sound device. ++ * @event: VirtIO sound event. ++ * ++ * Context: Interrupt context. ++ */ ++void virtsnd_jack_event(struct virtio_snd *snd, struct virtio_snd_event *event) ++{ ++ u32 jack_id = le32_to_cpu(event->data); ++ struct virtio_jack *vjack; ++ ++ if (jack_id >= snd->njacks) ++ return; ++ ++ vjack = &snd->jacks[jack_id]; ++ ++ switch (le32_to_cpu(event->hdr.code)) { ++ case VIRTIO_SND_EVT_JACK_CONNECTED: ++ vjack->connected = true; ++ break; ++ case VIRTIO_SND_EVT_JACK_DISCONNECTED: ++ vjack->connected = false; ++ break; ++ default: ++ return; ++ } ++ ++ snd_jack_report(vjack->jack, vjack->connected ? vjack->type : 0); ++} +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0007-ALSA-virtio-introduce-PCM-channel-map-support.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0007-ALSA-virtio-introduce-PCM-channel-map-support.patch new file mode 100644 index 00000000..6787b6bb --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0007-ALSA-virtio-introduce-PCM-channel-map-support.patch @@ -0,0 +1,337 @@ +From 0504a7501fa3fe1a52ca1526ba75a1c6de33c4f8 Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:08 +0100 +Subject: [PATCH 7/9] ALSA: virtio: introduce PCM channel map support + +Enumerate all available PCM channel maps and create ALSA controls. + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-9-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/Makefile | 1 + + sound/virtio/virtio_card.c | 10 ++ + sound/virtio/virtio_card.h | 8 ++ + sound/virtio/virtio_chmap.c | 219 ++++++++++++++++++++++++++++++++++++ + sound/virtio/virtio_pcm.h | 4 + + 5 files changed, 242 insertions(+) + create mode 100644 sound/virtio/virtio_chmap.c + +diff --git a/sound/virtio/Makefile b/sound/virtio/Makefile +index 09f485291285..2742bddb8874 100644 +--- a/sound/virtio/Makefile ++++ b/sound/virtio/Makefile +@@ -4,6 +4,7 @@ obj-$(CONFIG_SND_VIRTIO) += virtio_snd.o + + virtio_snd-objs := \ + virtio_card.o \ ++ virtio_chmap.o \ + virtio_ctl_msg.o \ + virtio_jack.o \ + virtio_pcm.o \ +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index 89bd66c1256e..1c03fcc41c3b 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -231,6 +231,10 @@ static int virtsnd_build_devs(struct virtio_snd *snd) + if (rc) + return rc; + ++ rc = virtsnd_chmap_parse_cfg(snd); ++ if (rc) ++ return rc; ++ + if (snd->njacks) { + rc = virtsnd_jack_build_devs(snd); + if (rc) +@@ -243,6 +247,12 @@ static int virtsnd_build_devs(struct virtio_snd *snd) + return rc; + } + ++ if (snd->nchmaps) { ++ rc = virtsnd_chmap_build_devs(snd); ++ if (rc) ++ return rc; ++ } ++ + return snd_card_register(snd->card); + } + +diff --git a/sound/virtio/virtio_card.h b/sound/virtio/virtio_card.h +index f154313c79fd..86ef3941895e 100644 +--- a/sound/virtio/virtio_card.h ++++ b/sound/virtio/virtio_card.h +@@ -43,6 +43,8 @@ struct virtio_snd_queue { + * @njacks: Number of jacks. + * @substreams: VirtIO PCM substreams. + * @nsubstreams: Number of PCM substreams. ++ * @chmaps: VirtIO channel maps. ++ * @nchmaps: Number of channel maps. + */ + struct virtio_snd { + struct virtio_device *vdev; +@@ -55,6 +57,8 @@ struct virtio_snd { + u32 njacks; + struct virtio_pcm_substream *substreams; + u32 nsubstreams; ++ struct virtio_snd_chmap_info *chmaps; ++ u32 nchmaps; + }; + + /* Message completion timeout in milliseconds (module parameter). */ +@@ -100,4 +104,8 @@ int virtsnd_jack_build_devs(struct virtio_snd *snd); + void virtsnd_jack_event(struct virtio_snd *snd, + struct virtio_snd_event *event); + ++int virtsnd_chmap_parse_cfg(struct virtio_snd *snd); ++ ++int virtsnd_chmap_build_devs(struct virtio_snd *snd); ++ + #endif /* VIRTIO_SND_CARD_H */ +diff --git a/sound/virtio/virtio_chmap.c b/sound/virtio/virtio_chmap.c +new file mode 100644 +index 000000000000..5bc924933a59 +--- /dev/null ++++ b/sound/virtio/virtio_chmap.c +@@ -0,0 +1,219 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * virtio-snd: Virtio sound device ++ * Copyright (C) 2021 OpenSynergy GmbH ++ */ ++#include <linux/virtio_config.h> ++ ++#include "virtio_card.h" ++ ++/* VirtIO->ALSA channel position map */ ++static const u8 g_v2a_position_map[] = { ++ [VIRTIO_SND_CHMAP_NONE] = SNDRV_CHMAP_UNKNOWN, ++ [VIRTIO_SND_CHMAP_NA] = SNDRV_CHMAP_NA, ++ [VIRTIO_SND_CHMAP_MONO] = SNDRV_CHMAP_MONO, ++ [VIRTIO_SND_CHMAP_FL] = SNDRV_CHMAP_FL, ++ [VIRTIO_SND_CHMAP_FR] = SNDRV_CHMAP_FR, ++ [VIRTIO_SND_CHMAP_RL] = SNDRV_CHMAP_RL, ++ [VIRTIO_SND_CHMAP_RR] = SNDRV_CHMAP_RR, ++ [VIRTIO_SND_CHMAP_FC] = SNDRV_CHMAP_FC, ++ [VIRTIO_SND_CHMAP_LFE] = SNDRV_CHMAP_LFE, ++ [VIRTIO_SND_CHMAP_SL] = SNDRV_CHMAP_SL, ++ [VIRTIO_SND_CHMAP_SR] = SNDRV_CHMAP_SR, ++ [VIRTIO_SND_CHMAP_RC] = SNDRV_CHMAP_RC, ++ [VIRTIO_SND_CHMAP_FLC] = SNDRV_CHMAP_FLC, ++ [VIRTIO_SND_CHMAP_FRC] = SNDRV_CHMAP_FRC, ++ [VIRTIO_SND_CHMAP_RLC] = SNDRV_CHMAP_RLC, ++ [VIRTIO_SND_CHMAP_RRC] = SNDRV_CHMAP_RRC, ++ [VIRTIO_SND_CHMAP_FLW] = SNDRV_CHMAP_FLW, ++ [VIRTIO_SND_CHMAP_FRW] = SNDRV_CHMAP_FRW, ++ [VIRTIO_SND_CHMAP_FLH] = SNDRV_CHMAP_FLH, ++ [VIRTIO_SND_CHMAP_FCH] = SNDRV_CHMAP_FCH, ++ [VIRTIO_SND_CHMAP_FRH] = SNDRV_CHMAP_FRH, ++ [VIRTIO_SND_CHMAP_TC] = SNDRV_CHMAP_TC, ++ [VIRTIO_SND_CHMAP_TFL] = SNDRV_CHMAP_TFL, ++ [VIRTIO_SND_CHMAP_TFR] = SNDRV_CHMAP_TFR, ++ [VIRTIO_SND_CHMAP_TFC] = SNDRV_CHMAP_TFC, ++ [VIRTIO_SND_CHMAP_TRL] = SNDRV_CHMAP_TRL, ++ [VIRTIO_SND_CHMAP_TRR] = SNDRV_CHMAP_TRR, ++ [VIRTIO_SND_CHMAP_TRC] = SNDRV_CHMAP_TRC, ++ [VIRTIO_SND_CHMAP_TFLC] = SNDRV_CHMAP_TFLC, ++ [VIRTIO_SND_CHMAP_TFRC] = SNDRV_CHMAP_TFRC, ++ [VIRTIO_SND_CHMAP_TSL] = SNDRV_CHMAP_TSL, ++ [VIRTIO_SND_CHMAP_TSR] = SNDRV_CHMAP_TSR, ++ [VIRTIO_SND_CHMAP_LLFE] = SNDRV_CHMAP_LLFE, ++ [VIRTIO_SND_CHMAP_RLFE] = SNDRV_CHMAP_RLFE, ++ [VIRTIO_SND_CHMAP_BC] = SNDRV_CHMAP_BC, ++ [VIRTIO_SND_CHMAP_BLC] = SNDRV_CHMAP_BLC, ++ [VIRTIO_SND_CHMAP_BRC] = SNDRV_CHMAP_BRC ++}; ++ ++/** ++ * virtsnd_chmap_parse_cfg() - Parse the channel map configuration. ++ * @snd: VirtIO sound device. ++ * ++ * This function is called during initial device initialization. ++ * ++ * Context: Any context that permits to sleep. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_chmap_parse_cfg(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ u32 i; ++ int rc; ++ ++ virtio_cread_le(vdev, struct virtio_snd_config, chmaps, &snd->nchmaps); ++ if (!snd->nchmaps) ++ return 0; ++ ++ snd->chmaps = devm_kcalloc(&vdev->dev, snd->nchmaps, ++ sizeof(*snd->chmaps), GFP_KERNEL); ++ if (!snd->chmaps) ++ return -ENOMEM; ++ ++ rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_CHMAP_INFO, 0, ++ snd->nchmaps, sizeof(*snd->chmaps), ++ snd->chmaps); ++ if (rc) ++ return rc; ++ ++ /* Count the number of channel maps per each PCM device/stream. */ ++ for (i = 0; i < snd->nchmaps; ++i) { ++ struct virtio_snd_chmap_info *info = &snd->chmaps[i]; ++ u32 nid = le32_to_cpu(info->hdr.hda_fn_nid); ++ struct virtio_pcm *vpcm; ++ struct virtio_pcm_stream *vs; ++ ++ vpcm = virtsnd_pcm_find_or_create(snd, nid); ++ if (IS_ERR(vpcm)) ++ return PTR_ERR(vpcm); ++ ++ switch (info->direction) { ++ case VIRTIO_SND_D_OUTPUT: ++ vs = &vpcm->streams[SNDRV_PCM_STREAM_PLAYBACK]; ++ break; ++ case VIRTIO_SND_D_INPUT: ++ vs = &vpcm->streams[SNDRV_PCM_STREAM_CAPTURE]; ++ break; ++ default: ++ dev_err(&vdev->dev, ++ "chmap #%u: unknown direction (%u)\n", i, ++ info->direction); ++ return -EINVAL; ++ } ++ ++ vs->nchmaps++; ++ } ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_chmap_add_ctls() - Create an ALSA control for channel maps. ++ * @pcm: ALSA PCM device. ++ * @direction: PCM stream direction (SNDRV_PCM_STREAM_XXX). ++ * @vs: VirtIO PCM stream. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_chmap_add_ctls(struct snd_pcm *pcm, int direction, ++ struct virtio_pcm_stream *vs) ++{ ++ u32 i; ++ int max_channels = 0; ++ ++ for (i = 0; i < vs->nchmaps; i++) ++ if (max_channels < vs->chmaps[i].channels) ++ max_channels = vs->chmaps[i].channels; ++ ++ return snd_pcm_add_chmap_ctls(pcm, direction, vs->chmaps, max_channels, ++ 0, NULL); ++} ++ ++/** ++ * virtsnd_chmap_build_devs() - Build ALSA controls for channel maps. ++ * @snd: VirtIO sound device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++int virtsnd_chmap_build_devs(struct virtio_snd *snd) ++{ ++ struct virtio_device *vdev = snd->vdev; ++ struct virtio_pcm *vpcm; ++ struct virtio_pcm_stream *vs; ++ u32 i; ++ int rc; ++ ++ /* Allocate channel map elements per each PCM device/stream. */ ++ list_for_each_entry(vpcm, &snd->pcm_list, list) { ++ for (i = 0; i < ARRAY_SIZE(vpcm->streams); ++i) { ++ vs = &vpcm->streams[i]; ++ ++ if (!vs->nchmaps) ++ continue; ++ ++ vs->chmaps = devm_kcalloc(&vdev->dev, vs->nchmaps + 1, ++ sizeof(*vs->chmaps), ++ GFP_KERNEL); ++ if (!vs->chmaps) ++ return -ENOMEM; ++ ++ vs->nchmaps = 0; ++ } ++ } ++ ++ /* Initialize channel maps per each PCM device/stream. */ ++ for (i = 0; i < snd->nchmaps; ++i) { ++ struct virtio_snd_chmap_info *info = &snd->chmaps[i]; ++ unsigned int channels = info->channels; ++ unsigned int ch; ++ struct snd_pcm_chmap_elem *chmap; ++ ++ vpcm = virtsnd_pcm_find(snd, le32_to_cpu(info->hdr.hda_fn_nid)); ++ if (IS_ERR(vpcm)) ++ return PTR_ERR(vpcm); ++ ++ if (info->direction == VIRTIO_SND_D_OUTPUT) ++ vs = &vpcm->streams[SNDRV_PCM_STREAM_PLAYBACK]; ++ else ++ vs = &vpcm->streams[SNDRV_PCM_STREAM_CAPTURE]; ++ ++ chmap = &vs->chmaps[vs->nchmaps++]; ++ ++ if (channels > ARRAY_SIZE(chmap->map)) ++ channels = ARRAY_SIZE(chmap->map); ++ ++ chmap->channels = channels; ++ ++ for (ch = 0; ch < channels; ++ch) { ++ u8 position = info->positions[ch]; ++ ++ if (position >= ARRAY_SIZE(g_v2a_position_map)) ++ return -EINVAL; ++ ++ chmap->map[ch] = g_v2a_position_map[position]; ++ } ++ } ++ ++ /* Create an ALSA control per each PCM device/stream. */ ++ list_for_each_entry(vpcm, &snd->pcm_list, list) { ++ if (!vpcm->pcm) ++ continue; ++ ++ for (i = 0; i < ARRAY_SIZE(vpcm->streams); ++i) { ++ vs = &vpcm->streams[i]; ++ ++ if (!vs->nchmaps) ++ continue; ++ ++ rc = virtsnd_chmap_add_ctls(vpcm->pcm, i, vs); ++ if (rc) ++ return rc; ++ } ++ } ++ ++ return 0; ++} +diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h +index efd0228746cf..1353fdc9bd69 100644 +--- a/sound/virtio/virtio_pcm.h ++++ b/sound/virtio/virtio_pcm.h +@@ -63,10 +63,14 @@ struct virtio_pcm_substream { + * struct virtio_pcm_stream - VirtIO PCM stream. + * @substreams: VirtIO substreams belonging to the stream. + * @nsubstreams: Number of substreams. ++ * @chmaps: Kernel channel maps belonging to the stream. ++ * @nchmaps: Number of channel maps. + */ + struct virtio_pcm_stream { + struct virtio_pcm_substream **substreams; + u32 nsubstreams; ++ struct snd_pcm_chmap_elem *chmaps; ++ u32 nchmaps; + }; + + /** +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0008-ALSA-virtio-introduce-device-suspend-resume-support.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0008-ALSA-virtio-introduce-device-suspend-resume-support.patch new file mode 100644 index 00000000..4131363e --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0008-ALSA-virtio-introduce-device-suspend-resume-support.patch @@ -0,0 +1,176 @@ +From 22e00a9a6c078d34f52f8c3b3b0972500e9f7636 Mon Sep 17 00:00:00 2001 +From: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Date: Tue, 2 Mar 2021 17:47:09 +0100 +Subject: [PATCH 8/9] ALSA: virtio: introduce device suspend/resume support + +All running PCM substreams are stopped on device suspend and restarted +on device resume. + +Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com> +Link: https://lore.kernel.org/r/20210302164709.3142702-10-anton.yakovlev@opensynergy.com +Signed-off-by: Takashi Iwai <tiwai@suse.de> +--- + sound/virtio/virtio_card.c | 56 +++++++++++++++++++++++++++++++++++ + sound/virtio/virtio_pcm.h | 3 ++ + sound/virtio/virtio_pcm_ops.c | 33 ++++++++++++++++----- + 3 files changed, 85 insertions(+), 7 deletions(-) + +diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c +index 1c03fcc41c3b..ae9128063917 100644 +--- a/sound/virtio/virtio_card.c ++++ b/sound/virtio/virtio_card.c +@@ -362,6 +362,58 @@ static void virtsnd_remove(struct virtio_device *vdev) + kfree(snd->event_msgs); + } + ++#ifdef CONFIG_PM_SLEEP ++/** ++ * virtsnd_freeze() - Suspend device. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_freeze(struct virtio_device *vdev) ++{ ++ struct virtio_snd *snd = vdev->priv; ++ unsigned int i; ++ ++ virtsnd_disable_event_vq(snd); ++ virtsnd_ctl_msg_cancel_all(snd); ++ ++ vdev->config->del_vqs(vdev); ++ vdev->config->reset(vdev); ++ ++ for (i = 0; i < snd->nsubstreams; ++i) ++ cancel_work_sync(&snd->substreams[i].elapsed_period); ++ ++ kfree(snd->event_msgs); ++ snd->event_msgs = NULL; ++ ++ return 0; ++} ++ ++/** ++ * virtsnd_restore() - Resume device. ++ * @vdev: VirtIO parent device. ++ * ++ * Context: Any context. ++ * Return: 0 on success, -errno on failure. ++ */ ++static int virtsnd_restore(struct virtio_device *vdev) ++{ ++ struct virtio_snd *snd = vdev->priv; ++ int rc; ++ ++ rc = virtsnd_find_vqs(snd); ++ if (rc) ++ return rc; ++ ++ virtio_device_ready(vdev); ++ ++ virtsnd_enable_event_vq(snd); ++ ++ return 0; ++} ++#endif /* CONFIG_PM_SLEEP */ ++ + static const struct virtio_device_id id_table[] = { + { VIRTIO_ID_SOUND, VIRTIO_DEV_ANY_ID }, + { 0 }, +@@ -374,6 +426,10 @@ static struct virtio_driver virtsnd_driver = { + .validate = virtsnd_validate, + .probe = virtsnd_probe, + .remove = virtsnd_remove, ++#ifdef CONFIG_PM_SLEEP ++ .freeze = virtsnd_freeze, ++ .restore = virtsnd_restore, ++#endif + }; + + static int __init init(void) +diff --git a/sound/virtio/virtio_pcm.h b/sound/virtio/virtio_pcm.h +index 1353fdc9bd69..062eb8e8f2cf 100644 +--- a/sound/virtio/virtio_pcm.h ++++ b/sound/virtio/virtio_pcm.h +@@ -31,6 +31,8 @@ struct virtio_pcm_msg; + * @xfer_xrun: Data underflow/overflow state (0 - no xrun, 1 - xrun). + * @stopped: True if the substream is stopped and must be released on the device + * side. ++ * @suspended: True if the substream is suspended and must be reconfigured on ++ * the device side at resume. + * @msgs: Allocated I/O messages. + * @nmsgs: Number of allocated I/O messages. + * @msg_last_enqueued: Index of the last I/O message added to the virtqueue. +@@ -52,6 +54,7 @@ struct virtio_pcm_substream { + bool xfer_enabled; + bool xfer_xrun; + bool stopped; ++ bool suspended; + struct virtio_pcm_msg **msgs; + unsigned int nmsgs; + int msg_last_enqueued; +diff --git a/sound/virtio/virtio_pcm_ops.c b/sound/virtio/virtio_pcm_ops.c +index 0682a2df6c8c..f8bfb87624be 100644 +--- a/sound/virtio/virtio_pcm_ops.c ++++ b/sound/virtio/virtio_pcm_ops.c +@@ -115,6 +115,7 @@ static int virtsnd_pcm_open(struct snd_pcm_substream *substream) + SNDRV_PCM_HW_PARAM_PERIODS); + + vss->stopped = !!virtsnd_pcm_msg_pending_num(vss); ++ vss->suspended = false; + + /* + * If the substream has already been used, then the I/O queue may be in +@@ -272,16 +273,31 @@ static int virtsnd_pcm_prepare(struct snd_pcm_substream *substream) + struct virtio_device *vdev = vss->snd->vdev; + struct virtio_snd_msg *msg; + +- if (virtsnd_pcm_msg_pending_num(vss)) { +- dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", +- vss->sid); +- return -EBADFD; ++ if (!vss->suspended) { ++ if (virtsnd_pcm_msg_pending_num(vss)) { ++ dev_err(&vdev->dev, "SID %u: invalid I/O queue state\n", ++ vss->sid); ++ return -EBADFD; ++ } ++ ++ vss->buffer_bytes = snd_pcm_lib_buffer_bytes(substream); ++ vss->hw_ptr = 0; ++ vss->msg_last_enqueued = -1; ++ } else { ++ struct snd_pcm_runtime *runtime = substream->runtime; ++ unsigned int buffer_bytes = snd_pcm_lib_buffer_bytes(substream); ++ unsigned int period_bytes = snd_pcm_lib_period_bytes(substream); ++ int rc; ++ ++ rc = virtsnd_pcm_dev_set_params(vss, buffer_bytes, period_bytes, ++ runtime->channels, ++ runtime->format, runtime->rate); ++ if (rc) ++ return rc; + } + +- vss->buffer_bytes = snd_pcm_lib_buffer_bytes(substream); +- vss->hw_ptr = 0; + vss->xfer_xrun = false; +- vss->msg_last_enqueued = -1; ++ vss->suspended = false; + vss->msg_count = 0; + + msg = virtsnd_pcm_ctl_msg_alloc(vss, VIRTIO_SND_R_PCM_PREPARE, +@@ -336,6 +352,9 @@ static int virtsnd_pcm_trigger(struct snd_pcm_substream *substream, int command) + } + + return virtsnd_ctl_msg_send_sync(snd, msg); ++ case SNDRV_PCM_TRIGGER_SUSPEND: ++ vss->suspended = true; ++ fallthrough; + case SNDRV_PCM_TRIGGER_STOP: + vss->stopped = true; + fallthrough; +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0009-Add-virtio-sound-id-in-virtio_ids.h-file.patch b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0009-Add-virtio-sound-id-in-virtio_ids.h-file.patch new file mode 100644 index 00000000..33fd54c3 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/0009-Add-virtio-sound-id-in-virtio_ids.h-file.patch @@ -0,0 +1,25 @@ +From 49c234ebcef22c9fd2a7f241f4eca9c4dbc4db95 Mon Sep 17 00:00:00 2001 +From: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com> +Date: Tue, 28 Nov 2023 14:27:36 +0000 +Subject: [PATCH 9/9] Add virtio sound id in virtio_ids.h file + +Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com> +--- + include/uapi/linux/virtio_ids.h | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h +index b052355ac7a3..bc740d6d2259 100644 +--- a/include/uapi/linux/virtio_ids.h ++++ b/include/uapi/linux/virtio_ids.h +@@ -45,6 +45,7 @@ + #define VIRTIO_ID_CRYPTO 20 /* virtio crypto */ + #define VIRTIO_ID_IOMMU 23 /* virtio IOMMU */ + #define VIRTIO_ID_MEM 24 /* virtio mem */ ++#define VIRTIO_ID_SOUND 25 /* virtio sound */ + #define VIRTIO_ID_FS 26 /* virtio filesystem */ + #define VIRTIO_ID_PMEM 27 /* virtio pmem */ + #define VIRTIO_ID_MAC80211_HWSIM 29 /* virtio mac80211-hwsim */ +-- +2.34.1 + diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/enable-virtio.cfg b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/enable-virtio.cfg new file mode 100644 index 00000000..82ff9ea1 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/enable-virtio.cfg @@ -0,0 +1,6 @@ +CONFIG_VIRTIO=y +CONFIG_VIRTIO_MMIO=y +CONFIG_VIRTIO_BLK=y +CONFIG_VIRTIO_BLK_SCSI=y +CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_PCI_LEGACY=y diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_can.cfg b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_can.cfg new file mode 100644 index 00000000..302e4ddb --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_can.cfg @@ -0,0 +1 @@ +CONFIG_CAN_DEV=m diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_input.cfg b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_input.cfg new file mode 100644 index 00000000..55e65d1b --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_input.cfg @@ -0,0 +1,2 @@ +CONFIG_INPUT=y +CONFIG_INPUT_EVDEV=y diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_loopback.cfg b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_loopback.cfg new file mode 100644 index 00000000..461dedf9 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_loopback.cfg @@ -0,0 +1,6 @@ +CONFIG_HW_RANDOM_VIRTIO=m +CONFIG_VIRTIO_INPUT=m +CONFIG_VIRTIO_GPIO=m +CONFIG_VIRTIO_CONSOLE=m +CONFIG_VIRTIO_BLK=m +CONFIG_SND_VIRTIO=m diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_sound.cfg b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_sound.cfg new file mode 100644 index 00000000..2e9486e2 --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-common/virtio_sound.cfg @@ -0,0 +1,6 @@ +CONFIG_SND=y +CONFIG_SOUND=y +CONFIG_SND_TIMER=y +CONFIG_SND_PCM=y +CONFIG_SND_JACK=y +CONFIG_SND_JACK_INPUT_DEV=y diff --git a/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend new file mode 100644 index 00000000..d65ed70a --- /dev/null +++ b/meta-egvirt/dynamic-layers/rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend @@ -0,0 +1,25 @@ + +FILESEXTRAPATHS:prepend := "${THISDIR}/linux-common/:" + +SRC_URI:append = " \ + file://enable-virtio.cfg \ + file://virtio_can.cfg \ + file://virtio_input.cfg \ + file://virtio_loopback.cfg \ + file://virtio_sound.cfg \ +" + +# virtio sound +SRC_URI += " \ + file://0001-ALSA-virtio-add-virtio-sound-driver.patch \ + file://0002-ALSA-virtio-handling-control-messages.patch \ + file://0003-ALSA-virtio-build-PCM-devices-and-substream-hardware.patch \ + file://0004-ALSA-virtio-handling-control-and-I-O-messages-for-th.patch \ + file://0005-ALSA-virtio-PCM-substream-operators.patch \ + file://0006-ALSA-virtio-introduce-jack-support.patch \ + file://0007-ALSA-virtio-introduce-PCM-channel-map-support.patch \ + file://0008-ALSA-virtio-introduce-device-suspend-resume-support.patch \ + file://0009-Add-virtio-sound-id-in-virtio_ids.h-file.patch \ + file://virtio_sound.cfg \ +" + |