linux-kernel - Re: [PATCH] sata_nv ADMA/NCQ support for nForce4

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Message-ID: <45345015.2010601@rtr.ca>
Date:	Mon, 16 Oct 2006 23:37:57 -0400
From:	Mark Lord <liml@....ca>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	Jens Axboe <jens.axboe@...cle.com>,
	Allen Martin <AMartin@...dia.com>,
	Jeff Garzik <jeff@...zik.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, prakash@...noor.de
Subject: Re: [PATCH] sata_nv ADMA/NCQ support for nForce4

Robert Hancock wrote:
> 
> +/* ADMA Physical Region Descriptor - one SG segment */
> +struct nv_adma_prd {
> +	__le64			addr;
> +	__le32			len;
> +	u8			flags;
> +	u8			packet_len;
> +	__le16			reserved;
> +};
..
> +/* ADMA Command Parameter Block
> +   The first 5 SG segments are stored inside the Command Parameter Block itself.
> +   If there are more than 5 segments the remainder are stored in a separate
> +   memory area indicated by next_aprd. */
> +struct nv_adma_cpb {
> +	u8			resp_flags;    //0
> +	u8			reserved1;     //1
> +	u8			ctl_flags;     //2
> +	// len is length of taskfile in 64 bit words
> + 	u8			len;           //3 
> +	u8			tag;           //4
> +	u8			next_cpb_idx;  //5
> +	__le16			reserved2;     //6-7
> +	__le16			tf[12];        //8-31
> +	struct nv_adma_prd	aprd[5];       //32-111
> +	__le64			next_aprd;     //112-119
> +	__le64			reserved3;     //120-127
> +};


Are those CPB / PRD structs endian-safe when using a big-endian CPU?

Cheers
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