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| author | jhb <jhb@FreeBSD.org> | 2016-09-30 18:47:34 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2016-09-30 18:47:34 +0000 |
| commit | c03db820416e89f29bd1f5cb8f59a221d4d11463 (patch) | |
| tree | 40eebb193bc1f2f586b485b14d6c3d5b8aae938b /sys/amd64 | |
| parent | 104dee440cbe66dc016a95db087f320c15704226 (diff) | |
| download | FreeBSD-src-c03db820416e89f29bd1f5cb8f59a221d4d11463.zip FreeBSD-src-c03db820416e89f29bd1f5cb8f59a221d4d11463.tar.gz | |
MFC 305502: Reset PCI pass through devices via PCI-e FLR during VM start/end.
Add routines to trigger a function level reset (FLR) of a PCI-express
device via the PCI-express device control register. This also includes
support routines to wait for pending transactions to complete as well
as calculating the maximum completion timeout permitted by a device.
Change the ppt(4) driver to reset pass through devices before attaching
to a VM during startup and before detaching from a VM during shutdown.
Sponsored by: Chelsio Communications
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/vmm/io/ppt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sys/amd64/vmm/io/ppt.c b/sys/amd64/vmm/io/ppt.c index 6541d7d..4c9ff47 100644 --- a/sys/amd64/vmm/io/ppt.c +++ b/sys/amd64/vmm/io/ppt.c @@ -362,6 +362,11 @@ ppt_assign_device(struct vm *vm, int bus, int slot, int func) if (ppt->vm != NULL && ppt->vm != vm) return (EBUSY); + pci_save_state(ppt->dev); + pcie_flr(ppt->dev, + max(pcie_get_max_completion_timeout(ppt->dev) / 1000, 10), + true); + pci_restore_state(ppt->dev); ppt->vm = vm; iommu_remove_device(iommu_host_domain(), pci_get_rid(ppt->dev)); iommu_add_device(vm_iommu_domain(vm), pci_get_rid(ppt->dev)); @@ -382,6 +387,12 @@ ppt_unassign_device(struct vm *vm, int bus, int slot, int func) */ if (ppt->vm != vm) return (EBUSY); + + pci_save_state(ppt->dev); + pcie_flr(ppt->dev, + max(pcie_get_max_completion_timeout(ppt->dev) / 1000, 10), + true); + pci_restore_state(ppt->dev); ppt_unmap_mmio(vm, ppt); ppt_teardown_msi(ppt); ppt_teardown_msix(ppt); |
