kernel/linux.git/drivers/vfio/mdev/mdev_driver.c, branch v6.6.132

vfio/mdev: consolidate all the description sysfs into the core code

2022-10-04T18:06:58+00:00

Every driver just emits a string, simply add a method to the mdev_driver to return it and provide a standard sysfs show function. Remove the now unused types_attrs field in struct mdev_driver and the support code for it. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Link: https://lore.kernel.org/r/20220923092652.100656-14-hch@lst.de Signed-off-by: Alex Williamson

vfio/mdev: consolidate all the device_api sysfs into the core code

2022-10-04T18:06:58+00:00

Every driver just emits a static string, simply feed it through the ops and provide a standard sysfs show function. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Reviewed-by: Tony Krowiak Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Reviewed-by: Eric Farman Link: https://lore.kernel.org/r/20220923092652.100656-11-hch@lst.de Signed-off-by: Alex Williamson

vfio/mdev: unexport mdev_bus_type

2022-10-04T18:06:58+00:00

mdev_bus_type is only used in mdev.ko now, so unexport it. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Link: https://lore.kernel.org/r/20220923092652.100656-8-hch@lst.de Signed-off-by: Alex Williamson

vfio/mdev: simplify mdev_type handling

2022-10-04T18:06:58+00:00

Instead of abusing struct attribute_group to control initialization of struct mdev_type, just define the actual attributes in the mdev_driver, allocate the mdev_type structures in the caller and pass them to mdev_register_parent. This allows the caller to use container_of to get at the containing structure and thus significantly simplify the code. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Tony Krowiak Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Reviewed-by: Eric Farman Link: https://lore.kernel.org/r/20220923092652.100656-6-hch@lst.de Signed-off-by: Alex Williamson

vfio/mdev: make mdev.h standalone includable

2022-10-04T18:06:58+00:00

Include and so that users of this headers don't need to do that and remove those includes that aren't needed any more. Signed-off-by: Christoph Hellwig Reviewed-by: Eric Farman Reviewed-by: Jason Gunthorpe Reviewed-by: Tony Krowiak Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Link: https://lore.kernel.org/r/20220923092652.100656-4-hch@lst.de Signed-off-by: Alex Williamson

vfio/mdev: Remove vfio_mdev.c

2022-04-21T11:36:56+00:00

Now that all mdev drivers directly create their own mdev_device driver and directly register with the vfio core's vfio_device_ops this is all dead code. Delete vfio_mdev.c and the mdev_parent_ops members that are connected to it. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Signed-off-by: Zhi Wang Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-31-hch@lst.de Reviewed-by: Kirti Wankhede Reviewed-by: Zhi Wang

vfio: simplify iommu group allocation for mediated devices

2021-09-30T18:46:44+00:00

Reuse the logic in vfio_noiommu_group_alloc to allocate a fake single-device iommu group for mediated devices by factoring out a common function, and replacing the noiommu boolean field in struct vfio_group with an enum to distinguish the three different kinds of groups. Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20210924155705.4258-8-hch@lst.de Signed-off-by: Alex Williamson

bus: Make remove callback return void

2021-07-21T09:53:42+00:00

The driver core ignores the return value of this callback because there is only little it can do when a device disappears. This is the final bit of a long lasting cleanup quest where several buses were converted to also return void from their remove callback. Additionally some resource leaks were fixed that were caused by drivers returning an error code in the expectation that the driver won't go away. With struct bus_type::remove returning void it's prevented that newly implemented buses return an ignored error code and so don't anticipate wrong expectations for driver authors. Reviewed-by: Tom Rix (For fpga) Reviewed-by: Mathieu Poirier Reviewed-by: Cornelia Huck (For drivers/s390 and drivers/vfio) Acked-by: Russell King (Oracle) (For ARM, Amba and related parts) Acked-by: Mark Brown Acked-by: Chen-Yu Tsai (for sunxi-rsb) Acked-by: Pali Rohár Acked-by: Mauro Carvalho Chehab (for media) Acked-by: Hans de Goede (For drivers/platform) Acked-by: Alexandre Belloni Acked-By: Vinod Koul Acked-by: Juergen Gross (For xen) Acked-by: Lee Jones (For mfd) Acked-by: Johannes Thumshirn (For mcb) Acked-by: Johan Hovold Acked-by: Srinivas Kandagatla (For slimbus) Acked-by: Kirti Wankhede (For vfio) Acked-by: Maximilian Luz Acked-by: Heikki Krogerus (For ulpi and typec) Acked-by: Samuel Iglesias Gonsálvez (For ipack) Acked-by: Geoff Levand (For ps3) Acked-by: Yehezkel Bernat (For thunderbolt) Acked-by: Alexander Shishkin (For intel_th) Acked-by: Dominik Brodowski (For pcmcia) Acked-by: Rafael J. Wysocki (For ACPI) Acked-by: Bjorn Andersson (rpmsg and apr) Acked-by: Srinivas Pandruvada (For intel-ish-hid) Acked-by: Dan Williams (For CXL, DAX, and NVDIMM) Acked-by: William Breathitt Gray (For isa) Acked-by: Stefan Richter (For firewire) Acked-by: Benjamin Tissoires (For hid) Acked-by: Thorsten Scherer (For siox) Acked-by: Sven Van Asbroeck (For anybuss) Acked-by: Ulf Hansson (For MMC) Acked-by: Wolfram Sang # for I2C Acked-by: Sudeep Holla Acked-by: Geert Uytterhoeven Acked-by: Dmitry Torokhov Acked-by: Finn Thain Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20210713193522.1770306-6-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman

vfio/mdev: Allow the mdev_parent_ops to specify the device driver to bind

2021-06-21T21:29:25+00:00

This allows a mdev driver to opt out of using vfio_mdev.c, instead the driver will provide a 'struct mdev_driver' and register directly with the driver core. Much of mdev_parent_ops becomes unused in this mode: - create()/remove() are done via the mdev_driver probe()/remove() - mdev_attr_groups becomes mdev_driver driver.dev_groups - Wrapper function callbacks are replaced with the same ones from struct vfio_device_ops Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Reviewed-by: Cornelia Huck Reviewed-by: Greg Kroah-Hartman Reviewed-by: Kirti Wankhede Link: https://lore.kernel.org/r/20210617142218.1877096-8-hch@lst.de Signed-off-by: Alex Williamson

vfio/mdev: Simplify driver registration

2021-04-07T21:39:16+00:00

This is only done once, we don't need to generate code to initialize a structure stored in the ELF .data segment. Fill in the three required .driver members directly instead of copying data into them during mdev_register_driver(). Further the to_mdev_driver() function doesn't belong in a public header, just inline it into the two places that need it. Finally, we can now clearly see that 'drv' derived from dev->driver cannot be NULL, firstly because the driver core forbids it, and secondly because NULL won't pass through the container_of(). Remove the dead code. Reviewed-by: Christoph Hellwig Reviewed-by: Kevin Tian Reviewed-by: Cornelia Huck Signed-off-by: Jason Gunthorpe Message-Id: <4-v2-d36939638fc6+d54-vfio2_jgg@nvidia.com> Signed-off-by: Alex Williamson