linux-kernel - Re: [PATCH v2 05/16] ASoC: qcom: audioreach: add basic pkt alloc support

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Date:   Wed, 14 Jul 2021 11:30:12 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        bjorn.andersson@...aro.org, broonie@...nel.org, robh@...nel.org
Cc:     devicetree@...r.kernel.org, alsa-devel@...a-project.org,
        bgoswami@...eaurora.org, lgirdwood@...il.com, tiwai@...e.de,
        plai@...eaurora.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/16] ASoC: qcom: audioreach: add basic pkt alloc
 support




> diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
> index cc7c1de2f1d9..721ea56b2cb5 100644
> --- a/sound/soc/qcom/Kconfig
> +++ b/sound/soc/qcom/Kconfig
> @@ -103,6 +103,12 @@ config SND_SOC_QDSP6
>  	 audio drivers. This includes q6asm, q6adm,
>  	 q6afe interfaces to DSP using apr.
>  
> +config SND_SOC_QCOM_AUDIOREACH
> +	tristate "SoC ALSA audio drives for Qualcomm AUDIOREACH"

typo: drivers?


> +/* container config */
> +struct apm_container_obj  {
> +	struct apm_container_cfg container_cfg;
> +	/* Capablity ID list */

typo: Capability

> +	struct apm_prop_data cap_data;
> +	uint32_t num_capablity_id;


> +static void *__audioreach_alloc_pkt(int payload_size, uint32_t opcode,
> +				     uint32_t token, uint32_t src_port,
> +				     uint32_t dest_port, bool has_cmd_hdr)
> +{
> +	struct apm_cmd_header *cmd_header;
> +	struct gpr_pkt *pkt;
> +	void *p;
> +	int pkt_size = GPR_HDR_SIZE + payload_size;
> +
> +	if (has_cmd_hdr)
> +		pkt_size += APM_CMD_HDR_SIZE;
> +
> +	p = kzalloc(pkt_size, GFP_ATOMIC);

is GFP_ATOMIC required? it's the same question really than my earlier one on spinlock_irqsave, it's rather hard to figure out in what context this code will run.

> +	if (!p)
> +		return ERR_PTR(-ENOMEM);
> +
> +	pkt = p;
> +	pkt->hdr.version = GPR_PKT_VER;
> +	pkt->hdr.hdr_size = 6;

magic number. looks like a missing macro...

> +	pkt->hdr.pkt_size = pkt_size;
> +	pkt->hdr.dest_port = dest_port;
> +	pkt->hdr.src_port = src_port;
> +
> +	pkt->hdr.dest_domain = GPR_DOMAIN_ID_ADSP;
> +	pkt->hdr.src_domain = GPR_DOMAIN_ID_APPS;
> +	pkt->hdr.token = token;
> +	pkt->hdr.opcode = opcode;
> +
> +	if (has_cmd_hdr) {
> +		p = p + GPR_HDR_SIZE;
> +		cmd_header = p;
> +		cmd_header->payload_size = payload_size;
> +	}
> +
> +	return pkt;
> +}