linux-kernel - [PATCH v2 0/3] PCI: VF resizable BAR

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Message-ID: <20240919223557.1897608-1-michal.winiarski@intel.com>
Date: Fri, 20 Sep 2024 00:35:54 +0200
From: Michał Winiarski <michal.winiarski@...el.com>
To: <linux-pci@...r.kernel.org>, <intel-xe@...ts.freedesktop.org>,
	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, "Bjorn
 Helgaas" <bhelgaas@...gle.com>, Christian König
	<christian.koenig@....com>, Krzysztof Wilczyński
	<kw@...ux.com>
CC: Rodrigo Vivi <rodrigo.vivi@...el.com>, Michal Wajdeczko
	<michal.wajdeczko@...el.com>, Lucas De Marchi <lucas.demarchi@...el.com>,
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard
	<mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Matt Roper
	<matthew.d.roper@...el.com>, Michał Winiarski
	<michal.winiarski@...el.com>
Subject: [PATCH v2 0/3] PCI: VF resizable BAR

Hi,

Resurrecting an old series [1], now that we have an in-tree user for it.

For regular BAR, drivers can use pci_resize_resource to resize it to the
desired size provided that it is supported by the hardware, which the
driver can query using pci_rebar_get_possible_sizes.
This series expands the API to work with IOV BAR as well.
It also adds the additional API to allow extending the VF BAR within the
original resource boundary.

Thanks,
-Michał

[1] https://lore.kernel.org/all/20211215141626.3090807-1-michal.winiarski@intel.com/

v1 -> v2:
- Add pci_iov_resource_extend() and usage in Xe driver
- Reduce the number of ifdefs (Christian)
- Drop patch 2/2 from v1 (Christian)
- Add a helper to avoid upsetting static analysis tools (Krzysztof)

Michał Winiarski (3):
  PCI: Add support for VF Resizable Bar extended cap
  PCI: Allow extending VF BAR within original resource boundary
  drm/xe/pf: Extend the VF LMEM BAR

 drivers/gpu/drm/xe/regs/xe_bars.h |   1 +
 drivers/gpu/drm/xe/xe_sriov_pf.c  |   8 ++
 drivers/pci/iov.c                 | 120 +++++++++++++++++++++++++++++-
 drivers/pci/pci.c                 |  40 +++++++++-
 drivers/pci/pci.h                 |  15 +++-
 drivers/pci/setup-res.c           |  44 +++++++++--
 include/linux/pci.h               |   3 +
 include/uapi/linux/pci_regs.h     |   1 +
 8 files changed, 223 insertions(+), 9 deletions(-)

-- 
2.46.0