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AJvYcCWdozzGPDRhjyDpYfMbNRHNJnktoQ+Z+GkVB+Apbiyq+NH9opSzEJvAzo1D9kmGJr/LoUEJwzlMEGsH8Zs=@vger.kernel.org X-Gm-Message-State: AOJu0YzAiWUZBh2bJZHNt9YQsaQLM0jg5UPglo3b0R7IHGPGM1bI7q7X 5UznjG6woFk9EZYI8wWBnjpvVLAbQmAHgGF3qLX5hwr4WjNIJ+uS8LbjaihNLvcxOeZGAquNSgp krE6MvXN3Qw+u6Z8uiA== X-Google-Smtp-Source: AGHT+IGuGJWlXT1GgrSFR5jnLb7A8Xwc1RjU3pAVlVHHLd9Rq5DVeyg7S8YW7qeBp1u7A9f0qGgaXcOFCxNv/1A= X-Received: from wmsp28.prod.google.com ([2002:a05:600c:1d9c:b0:456:1518:6d6e]) (user=verhaegen job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:40df:b0:3b8:d5cb:ae1c with SMTP id ffacd0b85a97d-3b8d5cbb0dfmr948024f8f.28.1754040497655; Fri, 01 Aug 2025 02:28:17 -0700 (PDT) Date: Fri, 1 Aug 2025 10:27:16 +0100 In-Reply-To: <20250801092720.1845282-1-verhaegen@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250801092720.1845282-1-verhaegen@google.com> X-Mailer: git-send-email 2.50.1.565.gc32cd1483b-goog Message-ID: <20250801092720.1845282-4-verhaegen@google.com> Subject: [PATCH v4 3/3] ALSA: compress_offload: Add SNDRV_COMPRESS_AVAIL64 ioctl From: Joris Verhaegen To: Vinod Koul , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown , Cezary Rojewski , Peter Ujfalusi , Bard Liao , Ranjani Sridharan , Kai Vehmanen , Pierre-Louis Bossart , Srinivas Kandagatla , Daniel Baluta , Orson Zhai , Baolin Wang , Chunyan Zhang , Kunihiko Hayashi , Masami Hiramatsu Cc: Joris Verhaegen , kernel-team@android.com, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, patches@opensource.cirrus.com, linux-arm-msm@vger.kernel.org, sound-open-firmware@alsa-project.org, linux-arm-kernel@lists.infradead.org, Miller Liang Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The previous patch introduced a 64-bit timestamp ioctl (SNDRV_COMPRESS_TSTAMP64). To provide a consistent API, this patch adds a corresponding 64-bit version of the SNDRV_COMPRESS_AVAIL ioctl. A new struct snd_compr_avail64 is added to the UAPI, which includes the 64-bit timestamp. The existing ioctl implementation is refactored to handle both the 32-bit and 64-bit variants. Reviewed-by: Miller Liang Tested-by: Joris Verhaegen Signed-off-by: Joris Verhaegen --- include/uapi/sound/compress_offload.h | 11 +++++++ sound/core/compress_offload.c | 45 +++++++++++++++++---------- 2 files changed, 40 insertions(+), 16 deletions(-) diff --git a/include/uapi/sound/compress_offload.h b/include/uapi/sound/com= press_offload.h index 70b8921601f9..26f756cc2e62 100644 --- a/include/uapi/sound/compress_offload.h +++ b/include/uapi/sound/compress_offload.h @@ -84,6 +84,16 @@ struct snd_compr_avail { struct snd_compr_tstamp tstamp; } __attribute__((packed, aligned(4))); =20 +/** + * struct snd_compr_avail64 - avail descriptor with tstamp in 64 bit format + * @avail: Number of bytes available in ring buffer for writing/reading + * @tstamp: timestamp information + */ +struct snd_compr_avail64 { + __u64 avail; + struct snd_compr_tstamp64 tstamp; +} __attribute__((packed, aligned(4))); + enum snd_compr_direction { SND_COMPRESS_PLAYBACK =3D 0, SND_COMPRESS_CAPTURE, @@ -231,6 +241,7 @@ struct snd_compr_task_status { #define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x20, struct snd_compr_tstamp) #define SNDRV_COMPRESS_AVAIL _IOR('C', 0x21, struct snd_compr_avail) #define SNDRV_COMPRESS_TSTAMP64 _IOR('C', 0x22, struct snd_compr_tstamp64) +#define SNDRV_COMPRESS_AVAIL64 _IOR('C', 0x23, struct snd_compr_avail64) #define SNDRV_COMPRESS_PAUSE _IO('C', 0x30) #define SNDRV_COMPRESS_RESUME _IO('C', 0x31) #define SNDRV_COMPRESS_START _IO('C', 0x32) diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index 445220fdb6a0..4d3cf49c0c47 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -203,13 +203,10 @@ static int snd_compr_update_tstamp(struct snd_compr_s= tream *stream, } =20 static size_t snd_compr_calc_avail(struct snd_compr_stream *stream, - struct snd_compr_avail *avail) + struct snd_compr_avail64 *avail) { - struct snd_compr_tstamp64 tstamp64 =3D { 0 }; - memset(avail, 0, sizeof(*avail)); - snd_compr_update_tstamp(stream, &tstamp64); - snd_compr_tstamp32_from_64(&avail->tstamp, &tstamp64); + snd_compr_update_tstamp(stream, &avail->tstamp); /* Still need to return avail even if tstamp can't be filled in */ =20 if (stream->runtime->total_bytes_available =3D=3D 0 && @@ -233,32 +230,47 @@ static size_t snd_compr_calc_avail(struct snd_compr_s= tream *stream, } =20 avail->avail =3D stream->runtime->total_bytes_available - - stream->runtime->total_bytes_transferred; + stream->runtime->total_bytes_transferred; if (stream->direction =3D=3D SND_COMPRESS_PLAYBACK) avail->avail =3D stream->runtime->buffer_size - avail->avail; =20 - pr_debug("ret avail as %llu\n", avail->avail); + pr_debug("ret avail as %zu\n", (size_t)avail->avail); return avail->avail; } =20 static inline size_t snd_compr_get_avail(struct snd_compr_stream *stream) { - struct snd_compr_avail avail; + struct snd_compr_avail64 avail; =20 return snd_compr_calc_avail(stream, &avail); } =20 -static int -snd_compr_ioctl_avail(struct snd_compr_stream *stream, unsigned long arg) +static void snd_compr_avail32_from_64(struct snd_compr_avail *avail32, + const struct snd_compr_avail64 *avail64) { - struct snd_compr_avail ioctl_avail; + avail32->avail =3D avail64->avail; + snd_compr_tstamp32_from_64(&avail32->tstamp, &avail64->tstamp); +} + +static int snd_compr_ioctl_avail(struct snd_compr_stream *stream, + unsigned long arg, bool is_32bit) +{ + struct snd_compr_avail64 ioctl_avail64; + struct snd_compr_avail ioctl_avail32; size_t avail; + const void *copy_from =3D &ioctl_avail64; + size_t copy_size =3D sizeof(ioctl_avail64); =20 if (stream->direction =3D=3D SND_COMPRESS_ACCEL) return -EBADFD; =20 - avail =3D snd_compr_calc_avail(stream, &ioctl_avail); - ioctl_avail.avail =3D avail; + avail =3D snd_compr_calc_avail(stream, &ioctl_avail64); + ioctl_avail64.avail =3D avail; + if (is_32bit) { + snd_compr_avail32_from_64(&ioctl_avail32, &ioctl_avail64); + copy_from =3D &ioctl_avail32; + copy_size =3D sizeof(ioctl_avail32); + } =20 switch (stream->runtime->state) { case SNDRV_PCM_STATE_OPEN: @@ -269,8 +281,7 @@ snd_compr_ioctl_avail(struct snd_compr_stream *stream, = unsigned long arg) break; } =20 - if (copy_to_user((__u64 __user *)arg, - &ioctl_avail, sizeof(ioctl_avail))) + if (copy_to_user((__u64 __user *)arg, copy_from, copy_size)) return -EFAULT; return 0; } @@ -1336,7 +1347,9 @@ static long snd_compr_ioctl(struct file *f, unsigned = int cmd, unsigned long arg) case SNDRV_COMPRESS_TSTAMP64: return snd_compr_tstamp(stream, arg, false); case SNDRV_COMPRESS_AVAIL: - return snd_compr_ioctl_avail(stream, arg); + return snd_compr_ioctl_avail(stream, arg, true); + case SNDRV_COMPRESS_AVAIL64: + return snd_compr_ioctl_avail(stream, arg, false); case SNDRV_COMPRESS_PAUSE: return snd_compr_pause(stream); case SNDRV_COMPRESS_RESUME: --=20 2.50.1.565.gc32cd1483b-goog