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![Takashi Iwai](/assets/img/avatar_default.png)
PCM core deals the empty ioctl field now as default(*).
Let's kill the redundant lines.
(*) commit fc033cbf6f
("ALSA: pcm: Allow NULL ioctl ops")
Link: https://lore.kernel.org/r/20191210061145.24641-16-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
694 lines
18 KiB
C
694 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Support for Digigram Lola PCI-e boards
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*
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* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include "lola.h"
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#define LOLA_MAX_BDL_ENTRIES 8
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#define LOLA_MAX_BUF_SIZE (1024*1024*1024)
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#define LOLA_BDL_ENTRY_SIZE (16 * 16)
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static struct lola_pcm *lola_get_pcm(struct snd_pcm_substream *substream)
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{
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struct lola *chip = snd_pcm_substream_chip(substream);
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return &chip->pcm[substream->stream];
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}
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static struct lola_stream *lola_get_stream(struct snd_pcm_substream *substream)
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{
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struct lola_pcm *pcm = lola_get_pcm(substream);
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unsigned int idx = substream->number;
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return &pcm->streams[idx];
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}
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static unsigned int lola_get_lrc(struct lola *chip)
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{
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return lola_readl(chip, BAR1, LRC);
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}
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static unsigned int lola_get_tstamp(struct lola *chip, bool quick_no_sync)
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{
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unsigned int tstamp = lola_get_lrc(chip) >> 8;
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if (chip->granularity) {
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unsigned int wait_banks = quick_no_sync ? 0 : 8;
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tstamp += (wait_banks + 1) * chip->granularity - 1;
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tstamp -= tstamp % chip->granularity;
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}
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return tstamp << 8;
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}
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/* clear any pending interrupt status */
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static void lola_stream_clear_pending_irq(struct lola *chip,
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struct lola_stream *str)
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{
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unsigned int val = lola_dsd_read(chip, str->dsd, STS);
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val &= LOLA_DSD_STS_DESE | LOLA_DSD_STS_BCIS;
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if (val)
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lola_dsd_write(chip, str->dsd, STS, val);
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}
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static void lola_stream_start(struct lola *chip, struct lola_stream *str,
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unsigned int tstamp)
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{
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lola_stream_clear_pending_irq(chip, str);
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lola_dsd_write(chip, str->dsd, CTL,
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LOLA_DSD_CTL_SRUN |
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LOLA_DSD_CTL_IOCE |
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LOLA_DSD_CTL_DEIE |
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LOLA_DSD_CTL_VLRCV |
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tstamp);
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}
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static void lola_stream_stop(struct lola *chip, struct lola_stream *str,
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unsigned int tstamp)
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{
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lola_dsd_write(chip, str->dsd, CTL,
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LOLA_DSD_CTL_IOCE |
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LOLA_DSD_CTL_DEIE |
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LOLA_DSD_CTL_VLRCV |
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tstamp);
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lola_stream_clear_pending_irq(chip, str);
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}
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static void wait_for_srst_clear(struct lola *chip, struct lola_stream *str)
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{
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unsigned long end_time = jiffies + msecs_to_jiffies(200);
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while (time_before(jiffies, end_time)) {
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unsigned int val;
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val = lola_dsd_read(chip, str->dsd, CTL);
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if (!(val & LOLA_DSD_CTL_SRST))
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return;
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msleep(1);
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}
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dev_warn(chip->card->dev, "SRST not clear (stream %d)\n", str->dsd);
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}
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static int lola_stream_wait_for_fifo(struct lola *chip,
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struct lola_stream *str,
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bool ready)
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{
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unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0;
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unsigned long end_time = jiffies + msecs_to_jiffies(200);
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while (time_before(jiffies, end_time)) {
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unsigned int reg = lola_dsd_read(chip, str->dsd, STS);
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if ((reg & LOLA_DSD_STS_FIFORDY) == val)
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return 0;
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msleep(1);
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}
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dev_warn(chip->card->dev, "FIFO not ready (stream %d)\n", str->dsd);
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return -EIO;
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}
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/* sync for FIFO ready/empty for all linked streams;
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* clear paused flag when FIFO gets ready again
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*/
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static int lola_sync_wait_for_fifo(struct lola *chip,
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struct snd_pcm_substream *substream,
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bool ready)
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{
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unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0;
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unsigned long end_time = jiffies + msecs_to_jiffies(200);
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struct snd_pcm_substream *s;
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int pending = 0;
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while (time_before(jiffies, end_time)) {
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pending = 0;
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snd_pcm_group_for_each_entry(s, substream) {
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struct lola_stream *str;
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if (s->pcm->card != substream->pcm->card)
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continue;
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str = lola_get_stream(s);
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if (str->prepared && str->paused) {
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unsigned int reg;
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reg = lola_dsd_read(chip, str->dsd, STS);
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if ((reg & LOLA_DSD_STS_FIFORDY) != val) {
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pending = str->dsd + 1;
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break;
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}
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if (ready)
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str->paused = 0;
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}
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}
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if (!pending)
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return 0;
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msleep(1);
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}
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dev_warn(chip->card->dev, "FIFO not ready (pending %d)\n", pending - 1);
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return -EIO;
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}
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/* finish pause - prepare for a new resume */
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static void lola_sync_pause(struct lola *chip,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_substream *s;
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lola_sync_wait_for_fifo(chip, substream, false);
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snd_pcm_group_for_each_entry(s, substream) {
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struct lola_stream *str;
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if (s->pcm->card != substream->pcm->card)
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continue;
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str = lola_get_stream(s);
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if (str->paused && str->prepared)
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lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRUN |
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LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE);
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}
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lola_sync_wait_for_fifo(chip, substream, true);
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}
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static void lola_stream_reset(struct lola *chip, struct lola_stream *str)
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{
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if (str->prepared) {
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if (str->paused)
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lola_sync_pause(chip, str->substream);
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str->prepared = 0;
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lola_dsd_write(chip, str->dsd, CTL,
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LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE);
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lola_stream_wait_for_fifo(chip, str, false);
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lola_stream_clear_pending_irq(chip, str);
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lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRST);
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lola_dsd_write(chip, str->dsd, LVI, 0);
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lola_dsd_write(chip, str->dsd, BDPU, 0);
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lola_dsd_write(chip, str->dsd, BDPL, 0);
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wait_for_srst_clear(chip, str);
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}
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}
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static const struct snd_pcm_hardware lola_pcm_hw = {
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.info = (SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE),
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.formats = (SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S32_LE |
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SNDRV_PCM_FMTBIT_FLOAT_LE),
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.rates = SNDRV_PCM_RATE_8000_192000,
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.rate_min = 8000,
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.rate_max = 192000,
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.channels_min = 1,
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.channels_max = 2,
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.buffer_bytes_max = LOLA_MAX_BUF_SIZE,
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.period_bytes_min = 128,
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.period_bytes_max = LOLA_MAX_BUF_SIZE / 2,
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.periods_min = 2,
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.periods_max = LOLA_MAX_BDL_ENTRIES,
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.fifo_size = 0,
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};
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static int lola_pcm_open(struct snd_pcm_substream *substream)
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{
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struct lola *chip = snd_pcm_substream_chip(substream);
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struct lola_pcm *pcm = lola_get_pcm(substream);
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struct lola_stream *str = lola_get_stream(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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mutex_lock(&chip->open_mutex);
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if (str->opened) {
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mutex_unlock(&chip->open_mutex);
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return -EBUSY;
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}
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str->substream = substream;
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str->master = NULL;
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str->opened = 1;
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runtime->hw = lola_pcm_hw;
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runtime->hw.channels_max = pcm->num_streams - str->index;
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if (chip->sample_rate) {
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/* sample rate is locked */
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runtime->hw.rate_min = chip->sample_rate;
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runtime->hw.rate_max = chip->sample_rate;
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} else {
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runtime->hw.rate_min = chip->sample_rate_min;
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runtime->hw.rate_max = chip->sample_rate_max;
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}
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chip->ref_count_rate++;
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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/* period size = multiple of chip->granularity (8, 16 or 32 frames)*/
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snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
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chip->granularity);
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snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
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chip->granularity);
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mutex_unlock(&chip->open_mutex);
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return 0;
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}
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static void lola_cleanup_slave_streams(struct lola_pcm *pcm,
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struct lola_stream *str)
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{
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int i;
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for (i = str->index + 1; i < pcm->num_streams; i++) {
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struct lola_stream *s = &pcm->streams[i];
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if (s->master != str)
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break;
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s->master = NULL;
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s->opened = 0;
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}
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}
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static int lola_pcm_close(struct snd_pcm_substream *substream)
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{
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struct lola *chip = snd_pcm_substream_chip(substream);
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struct lola_stream *str = lola_get_stream(substream);
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mutex_lock(&chip->open_mutex);
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if (str->substream == substream) {
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str->substream = NULL;
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str->opened = 0;
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}
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if (--chip->ref_count_rate == 0) {
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/* release sample rate */
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chip->sample_rate = 0;
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}
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mutex_unlock(&chip->open_mutex);
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return 0;
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}
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static int lola_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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struct lola_stream *str = lola_get_stream(substream);
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str->bufsize = 0;
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str->period_bytes = 0;
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str->format_verb = 0;
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return 0;
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}
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static int lola_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct lola *chip = snd_pcm_substream_chip(substream);
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struct lola_pcm *pcm = lola_get_pcm(substream);
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struct lola_stream *str = lola_get_stream(substream);
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mutex_lock(&chip->open_mutex);
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lola_stream_reset(chip, str);
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lola_cleanup_slave_streams(pcm, str);
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mutex_unlock(&chip->open_mutex);
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return 0;
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}
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/*
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* set up a BDL entry
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*/
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static int setup_bdle(struct snd_pcm_substream *substream,
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struct lola_stream *str, __le32 **bdlp,
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int ofs, int size)
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{
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__le32 *bdl = *bdlp;
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while (size > 0) {
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dma_addr_t addr;
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int chunk;
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if (str->frags >= LOLA_MAX_BDL_ENTRIES)
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return -EINVAL;
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addr = snd_pcm_sgbuf_get_addr(substream, ofs);
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/* program the address field of the BDL entry */
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bdl[0] = cpu_to_le32((u32)addr);
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bdl[1] = cpu_to_le32(upper_32_bits(addr));
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/* program the size field of the BDL entry */
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chunk = snd_pcm_sgbuf_get_chunk_size(substream, ofs, size);
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bdl[2] = cpu_to_le32(chunk);
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/* program the IOC to enable interrupt
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* only when the whole fragment is processed
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*/
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size -= chunk;
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bdl[3] = size ? 0 : cpu_to_le32(0x01);
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bdl += 4;
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str->frags++;
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ofs += chunk;
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}
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*bdlp = bdl;
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return ofs;
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}
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/*
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* set up BDL entries
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*/
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static int lola_setup_periods(struct lola *chip, struct lola_pcm *pcm,
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struct snd_pcm_substream *substream,
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struct lola_stream *str)
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{
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__le32 *bdl;
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int i, ofs, periods, period_bytes;
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period_bytes = str->period_bytes;
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periods = str->bufsize / period_bytes;
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/* program the initial BDL entries */
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bdl = (__le32 *)(pcm->bdl.area + LOLA_BDL_ENTRY_SIZE * str->index);
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ofs = 0;
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str->frags = 0;
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for (i = 0; i < periods; i++) {
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ofs = setup_bdle(substream, str, &bdl, ofs, period_bytes);
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if (ofs < 0)
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goto error;
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}
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return 0;
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error:
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dev_err(chip->card->dev, "Too many BDL entries: buffer=%d, period=%d\n",
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str->bufsize, period_bytes);
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return -EINVAL;
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}
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static unsigned int lola_get_format_verb(struct snd_pcm_substream *substream)
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{
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unsigned int verb;
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switch (substream->runtime->format) {
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case SNDRV_PCM_FORMAT_S16_LE:
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verb = 0x00000000;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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verb = 0x00000200;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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verb = 0x00000300;
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break;
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case SNDRV_PCM_FORMAT_FLOAT_LE:
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verb = 0x00001300;
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break;
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default:
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return 0;
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}
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verb |= substream->runtime->channels;
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return verb;
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}
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static int lola_set_stream_config(struct lola *chip,
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struct lola_stream *str,
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int channels)
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{
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int i, err;
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unsigned int verb, val;
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/* set format info for all channels
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* (with only one command for the first channel)
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*/
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err = lola_codec_read(chip, str->nid, LOLA_VERB_SET_STREAM_FORMAT,
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str->format_verb, 0, &val, NULL);
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if (err < 0) {
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dev_err(chip->card->dev, "Cannot set stream format 0x%x\n",
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str->format_verb);
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return err;
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}
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/* update stream - channel config */
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for (i = 0; i < channels; i++) {
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verb = (str->index << 6) | i;
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err = lola_codec_read(chip, str[i].nid,
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LOLA_VERB_SET_CHANNEL_STREAMID, 0, verb,
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&val, NULL);
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if (err < 0) {
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dev_err(chip->card->dev,
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"Cannot set stream channel %d\n", i);
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return err;
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}
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}
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return 0;
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}
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/*
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* set up the SD for streaming
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*/
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static int lola_setup_controller(struct lola *chip, struct lola_pcm *pcm,
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struct lola_stream *str)
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{
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dma_addr_t bdl;
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if (str->prepared)
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return -EINVAL;
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/* set up BDL */
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bdl = pcm->bdl.addr + LOLA_BDL_ENTRY_SIZE * str->index;
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lola_dsd_write(chip, str->dsd, BDPL, (u32)bdl);
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lola_dsd_write(chip, str->dsd, BDPU, upper_32_bits(bdl));
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/* program the stream LVI (last valid index) of the BDL */
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lola_dsd_write(chip, str->dsd, LVI, str->frags - 1);
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lola_stream_clear_pending_irq(chip, str);
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lola_dsd_write(chip, str->dsd, CTL,
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LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE | LOLA_DSD_CTL_SRUN);
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str->prepared = 1;
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return lola_stream_wait_for_fifo(chip, str, true);
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}
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static int lola_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct lola *chip = snd_pcm_substream_chip(substream);
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struct lola_pcm *pcm = lola_get_pcm(substream);
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struct lola_stream *str = lola_get_stream(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned int bufsize, period_bytes, format_verb;
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int i, err;
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mutex_lock(&chip->open_mutex);
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lola_stream_reset(chip, str);
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lola_cleanup_slave_streams(pcm, str);
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if (str->index + runtime->channels > pcm->num_streams) {
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mutex_unlock(&chip->open_mutex);
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return -EINVAL;
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}
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for (i = 1; i < runtime->channels; i++) {
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str[i].master = str;
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str[i].opened = 1;
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}
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mutex_unlock(&chip->open_mutex);
|
|
|
|
bufsize = snd_pcm_lib_buffer_bytes(substream);
|
|
period_bytes = snd_pcm_lib_period_bytes(substream);
|
|
format_verb = lola_get_format_verb(substream);
|
|
|
|
str->bufsize = bufsize;
|
|
str->period_bytes = period_bytes;
|
|
str->format_verb = format_verb;
|
|
|
|
err = lola_setup_periods(chip, pcm, substream, str);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = lola_set_sample_rate(chip, runtime->rate);
|
|
if (err < 0)
|
|
return err;
|
|
chip->sample_rate = runtime->rate; /* sample rate gets locked */
|
|
|
|
err = lola_set_stream_config(chip, str, runtime->channels);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = lola_setup_controller(chip, pcm, str);
|
|
if (err < 0) {
|
|
lola_stream_reset(chip, str);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lola_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct lola *chip = snd_pcm_substream_chip(substream);
|
|
struct lola_stream *str;
|
|
struct snd_pcm_substream *s;
|
|
unsigned int start;
|
|
unsigned int tstamp;
|
|
bool sync_streams;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
start = 1;
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
start = 0;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* sample correct synchronization is only needed starting several
|
|
* streams. On stop or if only one stream do as quick as possible
|
|
*/
|
|
sync_streams = (start && snd_pcm_stream_linked(substream));
|
|
tstamp = lola_get_tstamp(chip, !sync_streams);
|
|
spin_lock(&chip->reg_lock);
|
|
snd_pcm_group_for_each_entry(s, substream) {
|
|
if (s->pcm->card != substream->pcm->card)
|
|
continue;
|
|
str = lola_get_stream(s);
|
|
if (start)
|
|
lola_stream_start(chip, str, tstamp);
|
|
else
|
|
lola_stream_stop(chip, str, tstamp);
|
|
str->running = start;
|
|
str->paused = !start;
|
|
snd_pcm_trigger_done(s, substream);
|
|
}
|
|
spin_unlock(&chip->reg_lock);
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_uframes_t lola_pcm_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct lola *chip = snd_pcm_substream_chip(substream);
|
|
struct lola_stream *str = lola_get_stream(substream);
|
|
unsigned int pos = lola_dsd_read(chip, str->dsd, LPIB);
|
|
|
|
if (pos >= str->bufsize)
|
|
pos = 0;
|
|
return bytes_to_frames(substream->runtime, pos);
|
|
}
|
|
|
|
void lola_pcm_update(struct lola *chip, struct lola_pcm *pcm, unsigned int bits)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; bits && i < pcm->num_streams; i++) {
|
|
if (bits & (1 << i)) {
|
|
struct lola_stream *str = &pcm->streams[i];
|
|
if (str->substream && str->running)
|
|
snd_pcm_period_elapsed(str->substream);
|
|
bits &= ~(1 << i);
|
|
}
|
|
}
|
|
}
|
|
|
|
static const struct snd_pcm_ops lola_pcm_ops = {
|
|
.open = lola_pcm_open,
|
|
.close = lola_pcm_close,
|
|
.hw_params = lola_pcm_hw_params,
|
|
.hw_free = lola_pcm_hw_free,
|
|
.prepare = lola_pcm_prepare,
|
|
.trigger = lola_pcm_trigger,
|
|
.pointer = lola_pcm_pointer,
|
|
};
|
|
|
|
int lola_create_pcm(struct lola *chip)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
int i, err;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
|
|
&chip->pci->dev,
|
|
PAGE_SIZE, &chip->pcm[i].bdl);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
err = snd_pcm_new(chip->card, "Digigram Lola", 0,
|
|
chip->pcm[SNDRV_PCM_STREAM_PLAYBACK].num_streams,
|
|
chip->pcm[SNDRV_PCM_STREAM_CAPTURE].num_streams,
|
|
&pcm);
|
|
if (err < 0)
|
|
return err;
|
|
strlcpy(pcm->name, "Digigram Lola", sizeof(pcm->name));
|
|
pcm->private_data = chip;
|
|
for (i = 0; i < 2; i++) {
|
|
if (chip->pcm[i].num_streams)
|
|
snd_pcm_set_ops(pcm, i, &lola_pcm_ops);
|
|
}
|
|
/* buffer pre-allocation */
|
|
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
|
|
&chip->pci->dev,
|
|
1024 * 64, 32 * 1024 * 1024);
|
|
return 0;
|
|
}
|
|
|
|
void lola_free_pcm(struct lola *chip)
|
|
{
|
|
snd_dma_free_pages(&chip->pcm[0].bdl);
|
|
snd_dma_free_pages(&chip->pcm[1].bdl);
|
|
}
|
|
|
|
/*
|
|
*/
|
|
|
|
static int lola_init_stream(struct lola *chip, struct lola_stream *str,
|
|
int idx, int nid, int dir)
|
|
{
|
|
unsigned int val;
|
|
int err;
|
|
|
|
str->nid = nid;
|
|
str->index = idx;
|
|
str->dsd = idx;
|
|
if (dir == PLAY)
|
|
str->dsd += MAX_STREAM_IN_COUNT;
|
|
err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
|
|
if (err < 0) {
|
|
dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid);
|
|
return err;
|
|
}
|
|
if (dir == PLAY) {
|
|
/* test TYPE and bits 0..11 (no test bit9 : Digital = 0/1) */
|
|
if ((val & 0x00f00dff) != 0x00000010) {
|
|
dev_err(chip->card->dev,
|
|
"Invalid wcaps 0x%x for 0x%x\n",
|
|
val, nid);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
/* test TYPE and bits 0..11 (no test bit9 : Digital = 0/1)
|
|
* (bug : ignore bit8: Conn list = 0/1)
|
|
*/
|
|
if ((val & 0x00f00cff) != 0x00100010) {
|
|
dev_err(chip->card->dev,
|
|
"Invalid wcaps 0x%x for 0x%x\n",
|
|
val, nid);
|
|
return -EINVAL;
|
|
}
|
|
/* test bit9:DIGITAL and bit12:SRC_PRESENT*/
|
|
if ((val & 0x00001200) == 0x00001200)
|
|
chip->input_src_caps_mask |= (1 << idx);
|
|
}
|
|
|
|
err = lola_read_param(chip, nid, LOLA_PAR_STREAM_FORMATS, &val);
|
|
if (err < 0) {
|
|
dev_err(chip->card->dev, "Can't read FORMATS 0x%x\n", nid);
|
|
return err;
|
|
}
|
|
val &= 3;
|
|
if (val == 3)
|
|
str->can_float = true;
|
|
if (!(val & 1)) {
|
|
dev_err(chip->card->dev,
|
|
"Invalid formats 0x%x for 0x%x", val, nid);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int lola_init_pcm(struct lola *chip, int dir, int *nidp)
|
|
{
|
|
struct lola_pcm *pcm = &chip->pcm[dir];
|
|
int i, nid, err;
|
|
|
|
nid = *nidp;
|
|
for (i = 0; i < pcm->num_streams; i++, nid++) {
|
|
err = lola_init_stream(chip, &pcm->streams[i], i, nid, dir);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
*nidp = nid;
|
|
return 0;
|
|
}
|