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vfio: Remove dead code
Now that callers have been updated to use the vfio_device APIs the driver facing group interface is no longer used, delete it: - vfio_group_get_external_user_from_dev() - vfio_group_pin_pages() - vfio_group_unpin_pages() - vfio_group_iommu_domain() -- Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/6-v4-8045e76bf00b+13d-vfio_mdev_no_group_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe
Alex Williamson
parent
5eb20a78c0
commit
231657b345
@ -1947,44 +1947,6 @@ struct vfio_group *vfio_group_get_external_user(struct file *filep)
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}
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EXPORT_SYMBOL_GPL(vfio_group_get_external_user);
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/*
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* External user API, exported by symbols to be linked dynamically.
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* The external user passes in a device pointer
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* to verify that:
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* - A VFIO group is assiciated with the device;
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* - IOMMU is set for the group.
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* If both checks passed, vfio_group_get_external_user_from_dev()
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* increments the container user counter to prevent the VFIO group
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* from disposal before external user exits and returns the pointer
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* to the VFIO group.
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*
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* When the external user finishes using the VFIO group, it calls
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* vfio_group_put_external_user() to release the VFIO group and
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* decrement the container user counter.
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*
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* @dev [in] : device
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* Return error PTR or pointer to VFIO group.
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*/
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struct vfio_group *vfio_group_get_external_user_from_dev(struct device *dev)
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{
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struct vfio_group *group;
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int ret;
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group = vfio_group_get_from_dev(dev);
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if (!group)
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return ERR_PTR(-ENODEV);
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ret = vfio_group_add_container_user(group);
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if (ret) {
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vfio_group_put(group);
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return ERR_PTR(ret);
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}
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return group;
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}
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EXPORT_SYMBOL_GPL(vfio_group_get_external_user_from_dev);
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void vfio_group_put_external_user(struct vfio_group *group)
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{
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vfio_group_try_dissolve_container(group);
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@ -2218,101 +2180,6 @@ int vfio_unpin_pages(struct vfio_device *device, unsigned long *user_pfn,
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}
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EXPORT_SYMBOL(vfio_unpin_pages);
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/*
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* Pin a set of guest IOVA PFNs and return their associated host PFNs for a
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* VFIO group.
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*
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* The caller needs to call vfio_group_get_external_user() or
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* vfio_group_get_external_user_from_dev() prior to calling this interface,
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* so as to prevent the VFIO group from disposal in the middle of the call.
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* But it can keep the reference to the VFIO group for several calls into
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* this interface.
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* After finishing using of the VFIO group, the caller needs to release the
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* VFIO group by calling vfio_group_put_external_user().
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*
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* @group [in] : VFIO group
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* @user_iova_pfn [in] : array of user/guest IOVA PFNs to be pinned.
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* @npage [in] : count of elements in user_iova_pfn array.
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* This count should not be greater
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* VFIO_PIN_PAGES_MAX_ENTRIES.
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* @prot [in] : protection flags
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* @phys_pfn [out] : array of host PFNs
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* Return error or number of pages pinned.
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*/
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int vfio_group_pin_pages(struct vfio_group *group,
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unsigned long *user_iova_pfn, int npage,
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int prot, unsigned long *phys_pfn)
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{
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struct vfio_container *container;
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struct vfio_iommu_driver *driver;
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int ret;
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if (!group || !user_iova_pfn || !phys_pfn || !npage)
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return -EINVAL;
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if (group->dev_counter > 1)
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return -EINVAL;
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if (npage > VFIO_PIN_PAGES_MAX_ENTRIES)
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return -E2BIG;
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container = group->container;
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driver = container->iommu_driver;
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if (likely(driver && driver->ops->pin_pages))
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ret = driver->ops->pin_pages(container->iommu_data,
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group->iommu_group, user_iova_pfn,
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npage, prot, phys_pfn);
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else
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ret = -ENOTTY;
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return ret;
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}
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EXPORT_SYMBOL(vfio_group_pin_pages);
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/*
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* Unpin a set of guest IOVA PFNs for a VFIO group.
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*
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* The caller needs to call vfio_group_get_external_user() or
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* vfio_group_get_external_user_from_dev() prior to calling this interface,
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* so as to prevent the VFIO group from disposal in the middle of the call.
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* But it can keep the reference to the VFIO group for several calls into
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* this interface.
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* After finishing using of the VFIO group, the caller needs to release the
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* VFIO group by calling vfio_group_put_external_user().
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*
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* @group [in] : vfio group
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* @user_iova_pfn [in] : array of user/guest IOVA PFNs to be unpinned.
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* @npage [in] : count of elements in user_iova_pfn array.
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* This count should not be greater than
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* VFIO_PIN_PAGES_MAX_ENTRIES.
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* Return error or number of pages unpinned.
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*/
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int vfio_group_unpin_pages(struct vfio_group *group,
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unsigned long *user_iova_pfn, int npage)
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{
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struct vfio_container *container;
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struct vfio_iommu_driver *driver;
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int ret;
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if (!group || !user_iova_pfn || !npage)
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return -EINVAL;
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if (npage > VFIO_PIN_PAGES_MAX_ENTRIES)
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return -E2BIG;
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container = group->container;
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driver = container->iommu_driver;
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if (likely(driver && driver->ops->unpin_pages))
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ret = driver->ops->unpin_pages(container->iommu_data,
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user_iova_pfn, npage);
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else
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ret = -ENOTTY;
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return ret;
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}
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EXPORT_SYMBOL(vfio_group_unpin_pages);
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/*
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* This interface allows the CPUs to perform some sort of virtual DMA on
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* behalf of the device.
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@ -2516,24 +2383,6 @@ int vfio_unregister_notifier(struct vfio_device *device,
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}
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EXPORT_SYMBOL(vfio_unregister_notifier);
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struct iommu_domain *vfio_group_iommu_domain(struct vfio_group *group)
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{
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struct vfio_container *container;
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struct vfio_iommu_driver *driver;
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if (!group)
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return ERR_PTR(-EINVAL);
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container = group->container;
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driver = container->iommu_driver;
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if (likely(driver && driver->ops->group_iommu_domain))
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return driver->ops->group_iommu_domain(container->iommu_data,
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group->iommu_group);
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return ERR_PTR(-ENOTTY);
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}
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EXPORT_SYMBOL_GPL(vfio_group_iommu_domain);
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/*
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* Module/class support
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*/
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@ -140,8 +140,6 @@ int vfio_mig_get_next_state(struct vfio_device *device,
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*/
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extern struct vfio_group *vfio_group_get_external_user(struct file *filep);
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extern void vfio_group_put_external_user(struct vfio_group *group);
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extern struct vfio_group *vfio_group_get_external_user_from_dev(struct device
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*dev);
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extern bool vfio_external_group_match_file(struct vfio_group *group,
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struct file *filep);
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extern int vfio_external_user_iommu_id(struct vfio_group *group);
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@ -154,18 +152,9 @@ extern int vfio_pin_pages(struct vfio_device *device, unsigned long *user_pfn,
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int npage, int prot, unsigned long *phys_pfn);
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extern int vfio_unpin_pages(struct vfio_device *device, unsigned long *user_pfn,
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int npage);
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extern int vfio_group_pin_pages(struct vfio_group *group,
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unsigned long *user_iova_pfn, int npage,
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int prot, unsigned long *phys_pfn);
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extern int vfio_group_unpin_pages(struct vfio_group *group,
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unsigned long *user_iova_pfn, int npage);
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extern int vfio_dma_rw(struct vfio_device *device, dma_addr_t user_iova,
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void *data, size_t len, bool write);
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extern struct iommu_domain *vfio_group_iommu_domain(struct vfio_group *group);
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/* each type has independent events */
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enum vfio_notify_type {
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VFIO_IOMMU_NOTIFY = 0,
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