From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- sound/usb/proc.c | 236 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 236 insertions(+) create mode 100644 sound/usb/proc.c (limited to 'sound/usb/proc.c') diff --git a/sound/usb/proc.c b/sound/usb/proc.c new file mode 100644 index 000000000..f4b7a7ff3 --- /dev/null +++ b/sound/usb/proc.c @@ -0,0 +1,236 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + */ + +#include +#include + +#include +#include +#include + +#include "usbaudio.h" +#include "helper.h" +#include "card.h" +#include "endpoint.h" +#include "proc.h" + +/* convert our full speed USB rate into sampling rate in Hz */ +static inline unsigned get_full_speed_hz(unsigned int usb_rate) +{ + return (usb_rate * 125 + (1 << 12)) >> 13; +} + +/* convert our high speed USB rate into sampling rate in Hz */ +static inline unsigned get_high_speed_hz(unsigned int usb_rate) +{ + return (usb_rate * 125 + (1 << 9)) >> 10; +} + +/* + * common proc files to show the usb device info + */ +static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) +{ + struct snd_usb_audio *chip = entry->private_data; + if (!atomic_read(&chip->shutdown)) + snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum); +} + +static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) +{ + struct snd_usb_audio *chip = entry->private_data; + if (!atomic_read(&chip->shutdown)) + snd_iprintf(buffer, "%04x:%04x\n", + USB_ID_VENDOR(chip->usb_id), + USB_ID_PRODUCT(chip->usb_id)); +} + +void snd_usb_audio_create_proc(struct snd_usb_audio *chip) +{ + snd_card_ro_proc_new(chip->card, "usbbus", chip, + proc_audio_usbbus_read); + snd_card_ro_proc_new(chip->card, "usbid", chip, + proc_audio_usbid_read); +} + +static const char * const channel_labels[] = { + [SNDRV_CHMAP_NA] = "N/A", + [SNDRV_CHMAP_MONO] = "MONO", + [SNDRV_CHMAP_FL] = "FL", + [SNDRV_CHMAP_FR] = "FR", + [SNDRV_CHMAP_FC] = "FC", + [SNDRV_CHMAP_LFE] = "LFE", + [SNDRV_CHMAP_RL] = "RL", + [SNDRV_CHMAP_RR] = "RR", + [SNDRV_CHMAP_FLC] = "FLC", + [SNDRV_CHMAP_FRC] = "FRC", + [SNDRV_CHMAP_RC] = "RC", + [SNDRV_CHMAP_SL] = "SL", + [SNDRV_CHMAP_SR] = "SR", + [SNDRV_CHMAP_TC] = "TC", + [SNDRV_CHMAP_TFL] = "TFL", + [SNDRV_CHMAP_TFC] = "TFC", + [SNDRV_CHMAP_TFR] = "TFR", + [SNDRV_CHMAP_TRL] = "TRL", + [SNDRV_CHMAP_TRC] = "TRC", + [SNDRV_CHMAP_TRR] = "TRR", + [SNDRV_CHMAP_TFLC] = "TFLC", + [SNDRV_CHMAP_TFRC] = "TFRC", + [SNDRV_CHMAP_LLFE] = "LLFE", + [SNDRV_CHMAP_RLFE] = "RLFE", + [SNDRV_CHMAP_TSL] = "TSL", + [SNDRV_CHMAP_TSR] = "TSR", + [SNDRV_CHMAP_BC] = "BC", + [SNDRV_CHMAP_RLC] = "RLC", + [SNDRV_CHMAP_RRC] = "RRC", +}; + +/* + * proc interface for list the supported pcm formats + */ +static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer) +{ + struct audioformat *fp; + static const char * const sync_types[4] = { + "NONE", "ASYNC", "ADAPTIVE", "SYNC" + }; + + list_for_each_entry(fp, &subs->fmt_list, list) { + snd_pcm_format_t fmt; + + snd_iprintf(buffer, " Interface %d\n", fp->iface); + snd_iprintf(buffer, " Altset %d\n", fp->altsetting); + snd_iprintf(buffer, " Format:"); + pcm_for_each_format(fmt) + if (fp->formats & pcm_format_to_bits(fmt)) + snd_iprintf(buffer, " %s", + snd_pcm_format_name(fmt)); + snd_iprintf(buffer, "\n"); + snd_iprintf(buffer, " Channels: %d\n", fp->channels); + snd_iprintf(buffer, " Endpoint: 0x%02x (%d %s) (%s)\n", + fp->endpoint, + fp->endpoint & USB_ENDPOINT_NUMBER_MASK, + fp->endpoint & USB_DIR_IN ? "IN" : "OUT", + sync_types[(fp->ep_attr & USB_ENDPOINT_SYNCTYPE) >> 2]); + if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) { + snd_iprintf(buffer, " Rates: %d - %d (continuous)\n", + fp->rate_min, fp->rate_max); + } else { + unsigned int i; + snd_iprintf(buffer, " Rates: "); + for (i = 0; i < fp->nr_rates; i++) { + if (i > 0) + snd_iprintf(buffer, ", "); + snd_iprintf(buffer, "%d", fp->rate_table[i]); + } + snd_iprintf(buffer, "\n"); + } + if (subs->speed != USB_SPEED_FULL) + snd_iprintf(buffer, " Data packet interval: %d us\n", + 125 * (1 << fp->datainterval)); + snd_iprintf(buffer, " Bits: %d\n", fp->fmt_bits); + + if (fp->dsd_raw) + snd_iprintf(buffer, " DSD raw: DOP=%d, bitrev=%d\n", + fp->dsd_dop, fp->dsd_bitrev); + + if (fp->chmap) { + const struct snd_pcm_chmap_elem *map = fp->chmap; + int c; + + snd_iprintf(buffer, " Channel map:"); + for (c = 0; c < map->channels; c++) { + if (map->map[c] >= ARRAY_SIZE(channel_labels) || + !channel_labels[map->map[c]]) + snd_iprintf(buffer, " --"); + else + snd_iprintf(buffer, " %s", + channel_labels[map->map[c]]); + } + snd_iprintf(buffer, "\n"); + } + + if (fp->sync_ep) { + snd_iprintf(buffer, " Sync Endpoint: 0x%02x (%d %s)\n", + fp->sync_ep, + fp->sync_ep & USB_ENDPOINT_NUMBER_MASK, + fp->sync_ep & USB_DIR_IN ? "IN" : "OUT"); + snd_iprintf(buffer, " Sync EP Interface: %d\n", + fp->sync_iface); + snd_iprintf(buffer, " Sync EP Altset: %d\n", + fp->sync_altsetting); + snd_iprintf(buffer, " Implicit Feedback Mode: %s\n", + fp->implicit_fb ? "Yes" : "No"); + } + + // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize); + // snd_iprintf(buffer, " EP Attribute = %#x\n", fp->attributes); + } +} + +static void proc_dump_ep_status(struct snd_usb_substream *subs, + struct snd_usb_endpoint *data_ep, + struct snd_usb_endpoint *sync_ep, + struct snd_info_buffer *buffer) +{ + if (!data_ep) + return; + snd_iprintf(buffer, " Packet Size = %d\n", data_ep->curpacksize); + snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n", + subs->speed == USB_SPEED_FULL + ? get_full_speed_hz(data_ep->freqm) + : get_high_speed_hz(data_ep->freqm), + data_ep->freqm >> 16, data_ep->freqm & 0xffff); + if (sync_ep && data_ep->freqshift != INT_MIN) { + int res = 16 - data_ep->freqshift; + snd_iprintf(buffer, " Feedback Format = %d.%d\n", + (sync_ep->syncmaxsize > 3 ? 32 : 24) - res, res); + } +} + +static void proc_dump_substream_status(struct snd_usb_audio *chip, + struct snd_usb_substream *subs, + struct snd_info_buffer *buffer) +{ + guard(mutex)(&chip->mutex); + if (subs->running) { + snd_iprintf(buffer, " Status: Running\n"); + if (subs->cur_audiofmt) { + snd_iprintf(buffer, " Interface = %d\n", subs->cur_audiofmt->iface); + snd_iprintf(buffer, " Altset = %d\n", subs->cur_audiofmt->altsetting); + } + proc_dump_ep_status(subs, subs->data_endpoint, subs->sync_endpoint, buffer); + } else { + snd_iprintf(buffer, " Status: Stop\n"); + } +} + +static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) +{ + struct snd_usb_stream *stream = entry->private_data; + struct snd_usb_audio *chip = stream->chip; + + snd_iprintf(buffer, "%s : %s\n", chip->card->longname, stream->pcm->name); + + if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) { + snd_iprintf(buffer, "\nPlayback:\n"); + proc_dump_substream_status(chip, &stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer); + proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer); + } + if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) { + snd_iprintf(buffer, "\nCapture:\n"); + proc_dump_substream_status(chip, &stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer); + proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer); + } +} + +void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream) +{ + char name[32]; + struct snd_card *card = stream->chip->card; + + scnprintf(name, sizeof(name), "stream%d", stream->pcm_index); + snd_card_ro_proc_new(card, name, stream, proc_pcm_format_read); +} + -- cgit v1.3.1