From: Pankaj Gupta <pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: "Michael S. Tsirkin" <mst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: kwolf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
jack-AlSwsSmVLrQ@public.gmane.org,
xiaoguangrong eric
<xiaoguangrong.eric-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
riel-ebMLmSuQjDVBDgjK7y7TUQ@public.gmane.org,
qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org,
linux-nvdimm-y27Ovi1pjclAfugRpC6u6w@public.gmane.org,
david-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
ross zwisler
<ross.zwisler-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
lcapitulino-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
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linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
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stefanha-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
niteshnarayanlal-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org,
marcel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
imammedo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
nilal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
Subject: Re: [Qemu-devel] [RFC v2 1/2] virtio: add pmem driver
Date: Wed, 25 Apr 2018 11:11:09 -0400 (EDT) [thread overview]
Message-ID: <1651348200.22658063.1524669069712.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <20180425174705-mutt-send-email-mst-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>
> On Wed, Apr 25, 2018 at 04:54:13PM +0530, Pankaj Gupta wrote:
> > diff --git a/include/uapi/linux/virtio_ids.h
> > b/include/uapi/linux/virtio_ids.h
> > index 6d5c3b2..5ebd049 100644
> > --- a/include/uapi/linux/virtio_ids.h
> > +++ b/include/uapi/linux/virtio_ids.h
> > @@ -43,5 +43,6 @@
> > #define VIRTIO_ID_INPUT 18 /* virtio input */
> > #define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */
> > #define VIRTIO_ID_CRYPTO 20 /* virtio crypto */
> > +#define VIRTIO_ID_PMEM 21 /* virtio pmem */
> >
> > #endif /* _LINUX_VIRTIO_IDS_H */
>
> Please register the device id with virtio TC.
O.K Will create virtio spec and follow the procedure.
>
>
> > diff --git a/include/uapi/linux/virtio_pmem.h
> > b/include/uapi/linux/virtio_pmem.h
> > new file mode 100644
> > index 0000000..2ec27cb
> > --- /dev/null
> > +++ b/include/uapi/linux/virtio_pmem.h
> > @@ -0,0 +1,58 @@
> > +/* Virtio pmem Driver
> > + *
> > + * Discovers persitent memory range information
> > + * from host and provides a virtio based flushing
> > + * interface.
> > + */
> > +
> > +#ifndef _LINUX_VIRTIO_PMEM_H
> > +#define _LINUX_VIRTIO_PMEM_H
> > +
> > +#include <linux/types.h>
> > +#include <linux/virtio_types.h>
> > +#include <linux/virtio_ids.h>
> > +#include <linux/virtio_config.h>
> > +#include <linux/virtio_ring.h>
> > +
> > +
> > +struct virtio_pmem_config {
> > +
>
> don't add empty lines pls.
o.k
>
> > + uint64_t start;
> > + uint64_t size;
>
> Used LE fields for everything.
o.k
>
> > +};
> > +
> > +struct virtio_pmem {
> > +
> > + struct virtio_device *vdev;
> > + struct virtqueue *req_vq;
> > +
> > + uint64_t start;
> > + uint64_t size;
> > +} __packed;
>
> This does not belong in uapi, and should not be packed either.
o.k
>
> > +
> > +static struct virtio_device_id id_table[] = {
> > + { VIRTIO_ID_PMEM, VIRTIO_DEV_ANY_ID },
> > + { 0 },
> > +};
> > +
> > +void virtio_pmem_flush(struct device *dev)
> > +{
> > + struct scatterlist sg;
> > + struct virtio_device *vdev = dev_to_virtio(dev->parent->parent);
> > + struct virtio_pmem *vpmem = vdev->priv;
> > + char *buf = "FLUSH";
> > + int err;
> > +
> > + sg_init_one(&sg, buf, sizeof(buf));
> > +
> > + err = virtqueue_add_outbuf(vpmem->req_vq, &sg, 1, buf, GFP_KERNEL);
> > +
> > + if (err) {
> > + dev_err(&vdev->dev, "failed to send command to virtio pmem device\n");
> > + return;
> > + }
> > +
> > + virtqueue_kick(vpmem->req_vq);
> > +};
>
> this doesn't belong in uapi.
o.k.
Thanks,
Pankaj
next prev parent reply other threads:[~2018-04-25 15:11 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-25 11:24 [RFC v2 0/2] kvm "fake DAX" device flushing Pankaj Gupta
[not found] ` <20180425112415.12327-1-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-25 11:24 ` [RFC v2 1/2] virtio: add pmem driver Pankaj Gupta
[not found] ` <20180425112415.12327-2-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-25 14:21 ` Dan Williams
[not found] ` <CAPcyv4hvrB08XPTbVK0xT2_1Xmaid=-v3OMxJVDTNwQucsOHLA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-04-25 14:43 ` Dan Williams
[not found] ` <CAPcyv4hiowWozV527sQA_e4fdgCYbD6xfG==vepAqu0hxQEQcw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-04-26 12:27 ` Jeff Moyer
[not found] ` <x49o9i6885e.fsf-RRHT56Q3PSP4kTEheFKJxxDDeQx5vsVwAInAS/Ez/D0@public.gmane.org>
2018-04-26 17:15 ` [Qemu-devel] " Pankaj Gupta
[not found] ` <1499190564.23017177.1524762938762.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-26 17:24 ` Jeff Moyer
2018-04-25 14:52 ` Michael S. Tsirkin
[not found] ` <20180425174705-mutt-send-email-mst-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2018-04-25 15:11 ` Pankaj Gupta [this message]
2018-04-26 13:12 ` [Qemu-devel] " Stefan Hajnoczi
[not found] ` <20180426131236.GA30991-lxVrvc10SDRcolVlb+j0YCZi+YwRKgec@public.gmane.org>
2018-04-26 15:44 ` Pankaj Gupta
2018-04-27 13:31 ` Stefan Hajnoczi
[not found] ` <20180427133146.GB11150-lxVrvc10SDRcolVlb+j0YCZi+YwRKgec@public.gmane.org>
2018-04-28 10:48 ` Pankaj Gupta
2018-04-25 11:24 ` [RFC v2 2/2] pmem: device flush over VIRTIO Pankaj Gupta
[not found] ` <20180425112415.12327-3-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-25 14:23 ` Dan Williams
[not found] ` <CAPcyv4gpZzKfE7jY1peYOVd6sVhNz7jce1s_xNH_2Lt8AjRK-Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-04-25 14:47 ` Pankaj Gupta
2018-04-26 13:15 ` Stefan Hajnoczi
[not found] ` <20180426131517.GB30991-lxVrvc10SDRcolVlb+j0YCZi+YwRKgec@public.gmane.org>
2018-04-26 16:40 ` Pankaj Gupta
[not found] ` <58645254.23011245.1524760853269.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-26 16:57 ` Dan Williams
[not found] ` <CAPcyv4jv-hJNKJxak98T7aCnWztVEDTE8o=8fjvOrVmrTfyjdA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-04-26 17:13 ` Pankaj Gupta
2018-04-25 11:24 ` [RFC v2] qemu: Add virtio pmem device Pankaj Gupta
[not found] ` <20180425112415.12327-4-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-25 11:35 ` [Qemu-devel] " no-reply-isE1Te71pDtAfugRpC6u6w
2018-04-25 11:58 ` Pankaj Gupta
2018-04-25 14:23 ` Eric Blake
[not found] ` <79f72139-0fcb-3d5e-a16c-24f3b5ee1a07-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-25 14:51 ` Pankaj Gupta
2018-04-25 11:46 ` no-reply
2018-04-25 14:25 ` Eric Blake
[not found] ` <25f3e433-cfa6-4a62-ba7f-47aef1119dfc-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-04-25 14:55 ` Pankaj Gupta
2018-04-26 13:24 ` Stefan Hajnoczi
[not found] ` <20180426132406.GC30991-lxVrvc10SDRcolVlb+j0YCZi+YwRKgec@public.gmane.org>
2018-04-26 16:43 ` [Qemu-devel] " Pankaj Gupta
2018-06-01 12:24 ` [Qemu-devel] [RFC v2 0/2] kvm "fake DAX" device flushing Igor Mammedov
[not found] ` <20180601142410.5c986f13-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-06-04 5:56 ` Pankaj Gupta
2018-06-04 9:55 ` David Hildenbrand
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