From: Charles Machalow <csm10495@gmail.com>
To: Marta Rybczynska <mrybczyn@kalray.eu>
Cc: Christoph Hellwig <hch@lst.de>,
linux-nvme <linux-nvme@lists.infradead.org>,
kbusch <kbusch@kernel.org>, axboe <axboe@fb.com>,
Sagi Grimberg <sagi@grimberg.me>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] nvme: change nvme_passthru_cmd64's result field.
Date: Mon, 4 Nov 2019 07:20:43 -0800 [thread overview]
Message-ID: <CANSCoS9A1XY4DzdBwGU4+oT-uKvpohxhyWxdJ1ySJ6QKv6moKw@mail.gmail.com> (raw)
In-Reply-To: <266047531.90300507.1572880575232.JavaMail.zimbra@kalray.eu>
The thing with that structure is if you use it with the old IOCTL, the
result will go into rsvd2 instead of the first 32 bits of result.
- Charlie Scott Machalow
On Mon, Nov 4, 2019 at 7:16 AM Marta Rybczynska <mrybczyn@kalray.eu> wrote:
>
>
>
> ----- On 4 Nov, 2019, at 16:01, Charles Machalow csm10495@gmail.com wrote:
>
> > Yes. The idea is just to change the 64 IOCTL structure so it lines up
> > with the old ones so that the same struct can be used from userspace.
> > Right now the first 32 of 64's result doesn't line up with the old
> > result field.
> >
> > - Charlie Scott Machalow
>
> OK, then this will work on all architectures I know:
>
> struct nvme_passthru_cmd64 {
> __u8 opcode;
> __u8 flags;
> __u16 rsvd1;
> __u32 nsid;
> __u32 cdw2;
> __u32 cdw3;
> __u64 metadata;
> __u64 addr;
> __u32 metadata_len;
> __u32 data_len;
> __u32 cdw10;
> __u32 cdw11;
> __u32 cdw12;
> __u32 cdw13;
> __u32 cdw14;
> __u32 cdw15;
> __u32 timeout_ms;
> __u32 rsvd2;
> __u64 result;
> };
>
> Marta
next prev parent reply other threads:[~2019-11-04 15:20 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-31 5:03 [PATCH] nvme: change nvme_passthru_cmd64's result field Charles Machalow
2019-10-31 13:39 ` Christoph Hellwig
[not found] ` <CANSCoS8rN6g7u6iG4SRTcXjdj68cbimvX1n1Ex+FBAkhAAivJA@mail.gmail.com>
2019-10-31 13:59 ` Christoph Hellwig
2019-10-31 15:39 ` Charles Machalow
2019-10-31 13:59 ` Charles Machalow
2019-11-04 14:34 ` Marta Rybczynska
2019-11-04 14:51 ` Charles Machalow
2019-11-04 14:56 ` Marta Rybczynska
2019-11-04 15:01 ` Keith Busch
2019-11-04 15:29 ` Christoph Hellwig
2019-11-04 15:32 ` Keith Busch
2019-11-04 15:01 ` Charles Machalow
2019-11-04 15:16 ` Marta Rybczynska
2019-11-04 15:20 ` Charles Machalow [this message]
2019-11-04 15:30 ` Christoph Hellwig
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