[PATCH 00/18] xen: simplify frontend side ring setup

From: Juergen Gross <jgross@suse.com>
To: xen-devel@lists.xenproject.org, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linux-scsi@vger.kernel.org, linux-usb@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linux-integrity@vger.kernel.org,
	linux-pci@vger.kernel.org
Cc: "Juergen Gross" <jgross@suse.com>, "Jens Axboe" <axboe@kernel.dk>,
	alsa-devel@alsa-project.org,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	"Oleksandr Andrushchenko" <oleksandr_andrushchenko@epam.com>,
	"David Airlie" <airlied@linux.ie>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Takashi Iwai" <tiwai@suse.com>,
	"Jaroslav Kysela" <perex@perex.cz>,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Jarkko Sakkinen" <jarkko@kernel.org>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Peter Huewe" <peterhuewe@gmx.de>,
	"Roger Pau Monné" <roger.pau@citrix.com>
Subject: [PATCH 00/18] xen: simplify frontend side ring setup
Date: Wed, 20 Apr 2022 17:09:24 +0200	[thread overview]
Message-ID: <20220420150942.31235-1-jgross@suse.com> (raw)

Many Xen PV frontends share similar code for setting up a ring page
(allocating and granting access for the backend) and for tearing it
down.

Create new service functions doing all needed steps in one go.

This requires all frontends to use a common value for an invalid
grant reference in order to make the functions idempotent.

Juergen Gross (18):
  xen/blkfront: switch blkfront to use INVALID_GRANT_REF
  xen/netfront: switch netfront to use INVALID_GRANT_REF
  xen/scsifront: remove unused GRANT_INVALID_REF definition
  xen/usb: switch xen-hcd to use INVALID_GRANT_REF
  xen/drm: switch xen_drm_front to use INVALID_GRANT_REF
  xen/sound: switch xen_snd_front to use INVALID_GRANT_REF
  xen/dmabuf: switch gntdev-dmabuf to use INVALID_GRANT_REF
  xen/shbuf: switch xen-front-pgdir-shbuf to use INVALID_GRANT_REF
  xen/xenbus: add xenbus_setup_ring() service function
  xen/blkfront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/netfront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/tpmfront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/drmfront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/pcifront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/scsifront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/usbfront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/sndfront: use xenbus_setup_ring() and xenbus_teardown_ring()
  xen/xenbus: eliminate xenbus_grant_ring()

 drivers/block/xen-blkfront.c                | 54 ++++----------
 drivers/char/tpm/xen-tpmfront.c             | 18 +----
 drivers/gpu/drm/xen/xen_drm_front.h         |  9 ---
 drivers/gpu/drm/xen/xen_drm_front_evtchnl.c | 40 +++-------
 drivers/net/xen-netfront.c                  | 77 ++++++--------------
 drivers/pci/xen-pcifront.c                  | 19 +----
 drivers/scsi/xen-scsifront.c                | 30 ++------
 drivers/usb/host/xen-hcd.c                  | 59 ++++-----------
 drivers/xen/gntdev-dmabuf.c                 | 13 +---
 drivers/xen/xen-front-pgdir-shbuf.c         | 17 +----
 drivers/xen/xenbus/xenbus_client.c          | 81 ++++++++++++++++-----
 include/xen/xenbus.h                        |  4 +-
 sound/xen/xen_snd_front_evtchnl.c           | 41 +++--------
 sound/xen/xen_snd_front_evtchnl.h           |  9 ---
 14 files changed, 156 insertions(+), 315 deletions(-)

-- 
2.34.1