diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-14 21:10:43 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-14 21:10:43 +0300 |
commit | fe46a7dd189e25604716c03576d05ac8a5209743 (patch) | |
tree | de7572a9f41bb91e570dce1053283e56d1efdd94 /sound/virtio/virtio_kctl.c | |
parent | 705c1da8fa4816fb0159b5602fef1df5946a3ee2 (diff) | |
parent | a39d51ff1f52cd0b6fe7d379ac93bd8b4237d1b7 (diff) | |
download | linux-fe46a7dd189e25604716c03576d05ac8a5209743.tar.xz |
Merge tag 'sound-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound updates from Takashi Iwai:
"This was a relatively calm development cycle. Most of changes are
rather small device-specific fixes and enhancements. The only
significant changes in ALSA core are code refactoring with the recent
cleanup infrastructure, which should bring no functionality changes.
Some highlights below:
Core:
- Lots of cleanups in ALSA core code with automatic kfree cleanup and
locking guard macros
- New ALSA core kunit test
ASoC:
- SoundWire support for AMD ACP 6.3 systems
- Support for reporting version information for AVS firmware
- Support DSPless mode for Intel Soundwire systems
- Support for configuring CS35L56 amplifiers using EFI calibration
data
- Log which component is being operated on as part of power
management trace events.
- Support for Microchip SAM9x7, NXP i.MX95 and Qualcomm WCD939x
HD- and USB-audio:
- More Cirrus HD-audio codec support
- TAS2781 HD-audio codec fixes
- Scarlett2 mixer fixes
Others:
- Enhancement of virtio driver for audio control supports
- Cleanups of legacy PM code with new macros
- Firewire sound updates"
* tag 'sound-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (307 commits)
ALSA: usb-audio: Stop parsing channels bits when all channels are found.
ALSA: hda/tas2781: remove unnecessary runtime_pm calls
ALSA: hda/realtek - ALC236 fix volume mute & mic mute LED on some HP models
ALSA: aaci: Delete unused variable in aaci_do_suspend
ALSA: scarlett2: Fix Scarlett 4th Gen input gain range again
ALSA: scarlett2: Fix Scarlett 4th Gen input gain range
ALSA: scarlett2: Fix Scarlett 4th Gen autogain status values
ALSA: scarlett2: Fix Scarlett 4th Gen 4i4 low-voltage detection
ALSA: hda/tas2781: restore power state after system_resume
ALSA: hda/tas2781: do not call pm_runtime_force_* in system_resume/suspend
ALSA: hda/tas2781: do not reset cur_* values in runtime_suspend
ALSA: hda/tas2781: add lock to system_suspend
ALSA: hda/tas2781: use dev_dbg in system_resume
ALSA: hda/realtek: fix ALC285 issues on HP Envy x360 laptops
platform/x86: serial-multi-instantiate: Add support for CS35L54 and CS35L57
ALSA: hda: cs35l56: Add support for CS35L54 and CS35L57
ASoC: cs35l56: Add support for CS35L54 and CS35L57
ASoC: Intel: catpt: Carefully use PCI bitwise constants
ALSA: hda: hda_component: Include sound/hda_codec.h
ALSA: hda: hda_component: Add missing #include guards
...
Diffstat (limited to 'sound/virtio/virtio_kctl.c')
-rw-r--r-- | sound/virtio/virtio_kctl.c | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/sound/virtio/virtio_kctl.c b/sound/virtio/virtio_kctl.c new file mode 100644 index 000000000000..7aa79c05b464 --- /dev/null +++ b/sound/virtio/virtio_kctl.c @@ -0,0 +1,477 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * virtio-snd: Virtio sound device + * Copyright (C) 2022 OpenSynergy GmbH + */ +#include <sound/control.h> +#include <linux/virtio_config.h> + +#include "virtio_card.h" + +/* Map for converting VirtIO types to ALSA types. */ +static const snd_ctl_elem_type_t g_v2a_type_map[] = { + [VIRTIO_SND_CTL_TYPE_BOOLEAN] = SNDRV_CTL_ELEM_TYPE_BOOLEAN, + [VIRTIO_SND_CTL_TYPE_INTEGER] = SNDRV_CTL_ELEM_TYPE_INTEGER, + [VIRTIO_SND_CTL_TYPE_INTEGER64] = SNDRV_CTL_ELEM_TYPE_INTEGER64, + [VIRTIO_SND_CTL_TYPE_ENUMERATED] = SNDRV_CTL_ELEM_TYPE_ENUMERATED, + [VIRTIO_SND_CTL_TYPE_BYTES] = SNDRV_CTL_ELEM_TYPE_BYTES, + [VIRTIO_SND_CTL_TYPE_IEC958] = SNDRV_CTL_ELEM_TYPE_IEC958 +}; + +/* Map for converting VirtIO access rights to ALSA access rights. */ +static const unsigned int g_v2a_access_map[] = { + [VIRTIO_SND_CTL_ACCESS_READ] = SNDRV_CTL_ELEM_ACCESS_READ, + [VIRTIO_SND_CTL_ACCESS_WRITE] = SNDRV_CTL_ELEM_ACCESS_WRITE, + [VIRTIO_SND_CTL_ACCESS_VOLATILE] = SNDRV_CTL_ELEM_ACCESS_VOLATILE, + [VIRTIO_SND_CTL_ACCESS_INACTIVE] = SNDRV_CTL_ELEM_ACCESS_INACTIVE, + [VIRTIO_SND_CTL_ACCESS_TLV_READ] = SNDRV_CTL_ELEM_ACCESS_TLV_READ, + [VIRTIO_SND_CTL_ACCESS_TLV_WRITE] = SNDRV_CTL_ELEM_ACCESS_TLV_WRITE, + [VIRTIO_SND_CTL_ACCESS_TLV_COMMAND] = SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND +}; + +/* Map for converting VirtIO event masks to ALSA event masks. */ +static const unsigned int g_v2a_mask_map[] = { + [VIRTIO_SND_CTL_EVT_MASK_VALUE] = SNDRV_CTL_EVENT_MASK_VALUE, + [VIRTIO_SND_CTL_EVT_MASK_INFO] = SNDRV_CTL_EVENT_MASK_INFO, + [VIRTIO_SND_CTL_EVT_MASK_TLV] = SNDRV_CTL_EVENT_MASK_TLV +}; + +/** + * virtsnd_kctl_info() - Returns information about the control. + * @kcontrol: ALSA control element. + * @uinfo: Element information. + * + * Context: Process context. + * Return: 0 on success, -errno on failure. + */ +static int virtsnd_kctl_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct virtio_snd *snd = kcontrol->private_data; + struct virtio_kctl *kctl = &snd->kctls[kcontrol->private_value]; + struct virtio_snd_ctl_info *kinfo = + &snd->kctl_infos[kcontrol->private_value]; + unsigned int i; + + uinfo->type = g_v2a_type_map[le32_to_cpu(kinfo->type)]; + uinfo->count = le32_to_cpu(kinfo->count); + + switch (uinfo->type) { + case SNDRV_CTL_ELEM_TYPE_INTEGER: + uinfo->value.integer.min = + le32_to_cpu(kinfo->value.integer.min); + uinfo->value.integer.max = + le32_to_cpu(kinfo->value.integer.max); + uinfo->value.integer.step = + le32_to_cpu(kinfo->value.integer.step); + + break; + case SNDRV_CTL_ELEM_TYPE_INTEGER64: + uinfo->value.integer64.min = + le64_to_cpu(kinfo->value.integer64.min); + uinfo->value.integer64.max = + le64_to_cpu(kinfo->value.integer64.max); + uinfo->value.integer64.step = + le64_to_cpu(kinfo->value.integer64.step); + + break; + case SNDRV_CTL_ELEM_TYPE_ENUMERATED: + uinfo->value.enumerated.items = + le32_to_cpu(kinfo->value.enumerated.items); + i = uinfo->value.enumerated.item; + if (i >= uinfo->value.enumerated.items) + return -EINVAL; + + strscpy(uinfo->value.enumerated.name, kctl->items[i].item, + sizeof(uinfo->value.enumerated.name)); + + break; + } + + return 0; +} + +/** + * virtsnd_kctl_get() - Read the value from the control. + * @kcontrol: ALSA control element. + * @uvalue: Element value. + * + * Context: Process context. + * Return: 0 on success, -errno on failure. + */ +static int virtsnd_kctl_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *uvalue) +{ + struct virtio_snd *snd = kcontrol->private_data; + struct virtio_snd_ctl_info *kinfo = + &snd->kctl_infos[kcontrol->private_value]; + unsigned int type = le32_to_cpu(kinfo->type); + unsigned int count = le32_to_cpu(kinfo->count); + struct virtio_snd_msg *msg; + struct virtio_snd_ctl_hdr *hdr; + struct virtio_snd_ctl_value *kvalue; + size_t request_size = sizeof(*hdr); + size_t response_size = sizeof(struct virtio_snd_hdr) + sizeof(*kvalue); + unsigned int i; + int rc; + + msg = virtsnd_ctl_msg_alloc(request_size, response_size, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + virtsnd_ctl_msg_ref(msg); + + hdr = virtsnd_ctl_msg_request(msg); + hdr->hdr.code = cpu_to_le32(VIRTIO_SND_R_CTL_READ); + hdr->control_id = cpu_to_le32(kcontrol->private_value); + + rc = virtsnd_ctl_msg_send_sync(snd, msg); + if (rc) + goto on_failure; + + kvalue = (void *)((u8 *)virtsnd_ctl_msg_response(msg) + + sizeof(struct virtio_snd_hdr)); + + switch (type) { + case VIRTIO_SND_CTL_TYPE_BOOLEAN: + case VIRTIO_SND_CTL_TYPE_INTEGER: + for (i = 0; i < count; ++i) + uvalue->value.integer.value[i] = + le32_to_cpu(kvalue->value.integer[i]); + break; + case VIRTIO_SND_CTL_TYPE_INTEGER64: + for (i = 0; i < count; ++i) + uvalue->value.integer64.value[i] = + le64_to_cpu(kvalue->value.integer64[i]); + break; + case VIRTIO_SND_CTL_TYPE_ENUMERATED: + for (i = 0; i < count; ++i) + uvalue->value.enumerated.item[i] = + le32_to_cpu(kvalue->value.enumerated[i]); + break; + case VIRTIO_SND_CTL_TYPE_BYTES: + memcpy(uvalue->value.bytes.data, kvalue->value.bytes, count); + break; + case VIRTIO_SND_CTL_TYPE_IEC958: + memcpy(&uvalue->value.iec958, &kvalue->value.iec958, + sizeof(uvalue->value.iec958)); + break; + } + +on_failure: + virtsnd_ctl_msg_unref(msg); + + return rc; +} + +/** + * virtsnd_kctl_put() - Write the value to the control. + * @kcontrol: ALSA control element. + * @uvalue: Element value. + * + * Context: Process context. + * Return: 0 on success, -errno on failure. + */ +static int virtsnd_kctl_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *uvalue) +{ + struct virtio_snd *snd = kcontrol->private_data; + struct virtio_snd_ctl_info *kinfo = + &snd->kctl_infos[kcontrol->private_value]; + unsigned int type = le32_to_cpu(kinfo->type); + unsigned int count = le32_to_cpu(kinfo->count); + struct virtio_snd_msg *msg; + struct virtio_snd_ctl_hdr *hdr; + struct virtio_snd_ctl_value *kvalue; + size_t request_size = sizeof(*hdr) + sizeof(*kvalue); + size_t response_size = sizeof(struct virtio_snd_hdr); + unsigned int i; + + msg = virtsnd_ctl_msg_alloc(request_size, response_size, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = virtsnd_ctl_msg_request(msg); + hdr->hdr.code = cpu_to_le32(VIRTIO_SND_R_CTL_WRITE); + hdr->control_id = cpu_to_le32(kcontrol->private_value); + + kvalue = (void *)((u8 *)hdr + sizeof(*hdr)); + + switch (type) { + case VIRTIO_SND_CTL_TYPE_BOOLEAN: + case VIRTIO_SND_CTL_TYPE_INTEGER: + for (i = 0; i < count; ++i) + kvalue->value.integer[i] = + cpu_to_le32(uvalue->value.integer.value[i]); + break; + case VIRTIO_SND_CTL_TYPE_INTEGER64: + for (i = 0; i < count; ++i) + kvalue->value.integer64[i] = + cpu_to_le64(uvalue->value.integer64.value[i]); + break; + case VIRTIO_SND_CTL_TYPE_ENUMERATED: + for (i = 0; i < count; ++i) + kvalue->value.enumerated[i] = + cpu_to_le32(uvalue->value.enumerated.item[i]); + break; + case VIRTIO_SND_CTL_TYPE_BYTES: + memcpy(kvalue->value.bytes, uvalue->value.bytes.data, count); + break; + case VIRTIO_SND_CTL_TYPE_IEC958: + memcpy(&kvalue->value.iec958, &uvalue->value.iec958, + sizeof(kvalue->value.iec958)); + break; + } + + return virtsnd_ctl_msg_send_sync(snd, msg); +} + +/** + * virtsnd_kctl_tlv_op() - Perform an operation on the control's metadata. + * @kcontrol: ALSA control element. + * @op_flag: Operation code (SNDRV_CTL_TLV_OP_XXX). + * @size: Size of the TLV data in bytes. + * @utlv: TLV data. + * + * Context: Process context. + * Return: 0 on success, -errno on failure. + */ +static int virtsnd_kctl_tlv_op(struct snd_kcontrol *kcontrol, int op_flag, + unsigned int size, unsigned int __user *utlv) +{ + struct virtio_snd *snd = kcontrol->private_data; + struct virtio_snd_msg *msg; + struct virtio_snd_ctl_hdr *hdr; + unsigned int *tlv; + struct scatterlist sg; + int rc; + + msg = virtsnd_ctl_msg_alloc(sizeof(*hdr), sizeof(struct virtio_snd_hdr), + GFP_KERNEL); + if (!msg) + return -ENOMEM; + + tlv = kzalloc(size, GFP_KERNEL); + if (!tlv) { + rc = -ENOMEM; + goto on_msg_unref; + } + + sg_init_one(&sg, tlv, size); + + hdr = virtsnd_ctl_msg_request(msg); + hdr->control_id = cpu_to_le32(kcontrol->private_value); + + switch (op_flag) { + case SNDRV_CTL_TLV_OP_READ: + hdr->hdr.code = cpu_to_le32(VIRTIO_SND_R_CTL_TLV_READ); + + rc = virtsnd_ctl_msg_send(snd, msg, NULL, &sg, false); + if (!rc) { + if (copy_to_user(utlv, tlv, size)) + rc = -EFAULT; + } + + break; + case SNDRV_CTL_TLV_OP_WRITE: + case SNDRV_CTL_TLV_OP_CMD: + if (op_flag == SNDRV_CTL_TLV_OP_WRITE) + hdr->hdr.code = cpu_to_le32(VIRTIO_SND_R_CTL_TLV_WRITE); + else + hdr->hdr.code = + cpu_to_le32(VIRTIO_SND_R_CTL_TLV_COMMAND); + + if (copy_from_user(tlv, utlv, size)) { + rc = -EFAULT; + goto on_msg_unref; + } else { + rc = virtsnd_ctl_msg_send(snd, msg, &sg, NULL, false); + } + + break; + default: + rc = -EINVAL; + /* We never get here - we listed all values for op_flag */ + WARN_ON(1); + goto on_msg_unref; + } + kfree(tlv); + return rc; + +on_msg_unref: + virtsnd_ctl_msg_unref(msg); + kfree(tlv); + + return rc; +} + +/** + * virtsnd_kctl_get_enum_items() - Query items for the ENUMERATED element type. + * @snd: VirtIO sound device. + * @cid: Control element ID. + * + * This function is called during initial device initialization. + * + * Context: Any context that permits to sleep. + * Return: 0 on success, -errno on failure. + */ +static int virtsnd_kctl_get_enum_items(struct virtio_snd *snd, unsigned int cid) +{ + struct virtio_device *vdev = snd->vdev; + struct virtio_snd_ctl_info *kinfo = &snd->kctl_infos[cid]; + struct virtio_kctl *kctl = &snd->kctls[cid]; + struct virtio_snd_msg *msg; + struct virtio_snd_ctl_hdr *hdr; + unsigned int n = le32_to_cpu(kinfo->value.enumerated.items); + struct scatterlist sg; + + msg = virtsnd_ctl_msg_alloc(sizeof(*hdr), + sizeof(struct virtio_snd_hdr), GFP_KERNEL); + if (!msg) + return -ENOMEM; + + kctl->items = devm_kcalloc(&vdev->dev, n, sizeof(*kctl->items), + GFP_KERNEL); + if (!kctl->items) { + virtsnd_ctl_msg_unref(msg); + return -ENOMEM; + } + + sg_init_one(&sg, kctl->items, n * sizeof(*kctl->items)); + + hdr = virtsnd_ctl_msg_request(msg); + hdr->hdr.code = cpu_to_le32(VIRTIO_SND_R_CTL_ENUM_ITEMS); + hdr->control_id = cpu_to_le32(cid); + + return virtsnd_ctl_msg_send(snd, msg, NULL, &sg, false); +} + +/** + * virtsnd_kctl_parse_cfg() - Parse the control element 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_kctl_parse_cfg(struct virtio_snd *snd) +{ + struct virtio_device *vdev = snd->vdev; + u32 i; + int rc; + + virtio_cread_le(vdev, struct virtio_snd_config, controls, + &snd->nkctls); + if (!snd->nkctls) + return 0; + + snd->kctl_infos = devm_kcalloc(&vdev->dev, snd->nkctls, + sizeof(*snd->kctl_infos), GFP_KERNEL); + if (!snd->kctl_infos) + return -ENOMEM; + + snd->kctls = devm_kcalloc(&vdev->dev, snd->nkctls, sizeof(*snd->kctls), + GFP_KERNEL); + if (!snd->kctls) + return -ENOMEM; + + rc = virtsnd_ctl_query_info(snd, VIRTIO_SND_R_CTL_INFO, 0, snd->nkctls, + sizeof(*snd->kctl_infos), snd->kctl_infos); + if (rc) + return rc; + + for (i = 0; i < snd->nkctls; ++i) { + struct virtio_snd_ctl_info *kinfo = &snd->kctl_infos[i]; + unsigned int type = le32_to_cpu(kinfo->type); + + if (type == VIRTIO_SND_CTL_TYPE_ENUMERATED) { + rc = virtsnd_kctl_get_enum_items(snd, i); + if (rc) + return rc; + } + } + + return 0; +} + +/** + * virtsnd_kctl_build_devs() - Build ALSA control elements. + * @snd: VirtIO sound device. + * + * Context: Any context that permits to sleep. + * Return: 0 on success, -errno on failure. + */ +int virtsnd_kctl_build_devs(struct virtio_snd *snd) +{ + unsigned int cid; + + for (cid = 0; cid < snd->nkctls; ++cid) { + struct virtio_snd_ctl_info *kinfo = &snd->kctl_infos[cid]; + struct virtio_kctl *kctl = &snd->kctls[cid]; + struct snd_kcontrol_new kctl_new; + unsigned int i; + int rc; + + memset(&kctl_new, 0, sizeof(kctl_new)); + + kctl_new.iface = SNDRV_CTL_ELEM_IFACE_MIXER; + kctl_new.name = kinfo->name; + kctl_new.index = le32_to_cpu(kinfo->index); + + for (i = 0; i < ARRAY_SIZE(g_v2a_access_map); ++i) + if (le32_to_cpu(kinfo->access) & (1 << i)) + kctl_new.access |= g_v2a_access_map[i]; + + if (kctl_new.access & (SNDRV_CTL_ELEM_ACCESS_TLV_READ | + SNDRV_CTL_ELEM_ACCESS_TLV_WRITE | + SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND)) { + kctl_new.access |= SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; + kctl_new.tlv.c = virtsnd_kctl_tlv_op; + } + + kctl_new.info = virtsnd_kctl_info; + kctl_new.get = virtsnd_kctl_get; + kctl_new.put = virtsnd_kctl_put; + kctl_new.private_value = cid; + + kctl->kctl = snd_ctl_new1(&kctl_new, snd); + if (!kctl->kctl) + return -ENOMEM; + + rc = snd_ctl_add(snd->card, kctl->kctl); + if (rc) + return rc; + } + + return 0; +} + +/** + * virtsnd_kctl_event() - Handle the control element event notification. + * @snd: VirtIO sound device. + * @event: VirtIO sound event. + * + * Context: Interrupt context. + */ +void virtsnd_kctl_event(struct virtio_snd *snd, struct virtio_snd_event *event) +{ + struct virtio_snd_ctl_event *kevent = + (struct virtio_snd_ctl_event *)event; + struct virtio_kctl *kctl; + unsigned int cid = le16_to_cpu(kevent->control_id); + unsigned int mask = 0; + unsigned int i; + + if (cid >= snd->nkctls) + return; + + for (i = 0; i < ARRAY_SIZE(g_v2a_mask_map); ++i) + if (le16_to_cpu(kevent->mask) & (1 << i)) + mask |= g_v2a_mask_map[i]; + + + kctl = &snd->kctls[cid]; + + snd_ctl_notify(snd->card, mask, &kctl->kctl->id); +} |