vfio/pci: Remove the core dependency on driver data

vfio-pci-core currently has runtime functions that interpret pci
driver_data as a pointer to vfio_pci_core_device, and enforce vfio
variant drivers must set vfio_pci_core_device to their pci driver_data.
This constrains variant drivers' private-data layout, including the
typed driver data used by the Rust PCI infrastructure.

Add VFIO_PCI_CORE_DEFINE_CALLBACKS macro to generate wrapper code for
each vfio variant driver, update vfio variant drivers to store their
private structures in driver_data and use generated wrapper to pass the
vfio core device to helpers.

Assisted-by: LLM
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Suggested-by: Alex Williamson <alex.williamson@nvidia.com>
Suggested-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/all/DLFD2ZDSK9YQ.3A4R66G8UJMD8@kernel.org/
Signed-off-by: Simon Song <xinmengs@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20261005184236.1946167-2-xinmengs@nvidia.com
[VGA chunks and commit log reference dropped with rebase to
commit 93d41424caf7 ("PCI/VGA: pass a data pointer to be used in the decode callback (v2)")]
Signed-off-by: Alex Williamson <alex@shazbot.org>

0 files changed, 0 insertions, 0 deletions