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| author | Alex Williamson <alex.williamson@redhat.com> | 2016-02-22 16:02:39 -0700 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2016-02-22 16:10:09 -0700 |
| commit | 28541d41c9e04cb2ddbf93facd1e376dd5613360 (patch) | |
| tree | bfd5234a1dadc51d7f73cd69f36ebb71e7df224f /drivers/vfio/pci/vfio_pci_private.h | |
| parent | c7bb4cb40f89224dc55755178343728e30dd583a (diff) | |
| download | linux-28541d41c9e04cb2ddbf93facd1e376dd5613360.tar.bz2 | |
vfio/pci: Add infrastructure for additional device specific regions
Add support for additional regions with indexes started after the
already defined fixed regions. Device specific code can register
these regions with the new vfio_pci_register_dev_region() function.
The ops structure per region currently only includes read/write
access and a release function, allowing automatic cleanup when the
device is closed. mmap support is only missing here because it's
not needed by the first user queued for this support.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_private.h')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_private.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h index 0e7394f8f69b..0710bda5ae2c 100644 --- a/drivers/vfio/pci/vfio_pci_private.h +++ b/drivers/vfio/pci/vfio_pci_private.h @@ -14,6 +14,7 @@ #include <linux/mutex.h> #include <linux/pci.h> #include <linux/irqbypass.h> +#include <linux/types.h> #ifndef VFIO_PCI_PRIVATE_H #define VFIO_PCI_PRIVATE_H @@ -33,6 +34,25 @@ struct vfio_pci_irq_ctx { struct irq_bypass_producer producer; }; +struct vfio_pci_device; +struct vfio_pci_region; + +struct vfio_pci_regops { + size_t (*rw)(struct vfio_pci_device *vdev, char __user *buf, + size_t count, loff_t *ppos, bool iswrite); + void (*release)(struct vfio_pci_device *vdev, + struct vfio_pci_region *region); +}; + +struct vfio_pci_region { + u32 type; + u32 subtype; + const struct vfio_pci_regops *ops; + void *data; + size_t size; + u32 flags; +}; + struct vfio_pci_device { struct pci_dev *pdev; void __iomem *barmap[PCI_STD_RESOURCE_END + 1]; @@ -45,6 +65,8 @@ struct vfio_pci_device { struct vfio_pci_irq_ctx *ctx; int num_ctx; int irq_type; + int num_regions; + struct vfio_pci_region *region; u8 msi_qmax; u8 msix_bar; u16 msix_size; @@ -91,4 +113,9 @@ extern void vfio_pci_uninit_perm_bits(void); extern int vfio_config_init(struct vfio_pci_device *vdev); extern void vfio_config_free(struct vfio_pci_device *vdev); + +extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev, + unsigned int type, unsigned int subtype, + const struct vfio_pci_regops *ops, + size_t size, u32 flags, void *data); #endif /* VFIO_PCI_PRIVATE_H */ |