| Message ID | 1544593569-8923-3-git-send-email-srinath.mannam@broadcom.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | PCIe Host request to reserve IOVA | expand |
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 511ff9a..346da81 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -220,6 +220,14 @@ static void iova_reserve_pci_windows(struct pci_dev *dev, hi = iova_pfn(iovad, window->res->end - window->offset); reserve_iova(iovad, lo, hi); } + + /* Get reserved DMA windows from host bridge */ + resource_list_for_each_entry(window, &bridge->dma_resv) { + + lo = iova_pfn(iovad, window->res->start - window->offset); + hi = iova_pfn(iovad, window->res->end - window->offset); + reserve_iova(iovad, lo, hi); + } } static int iova_reserve_iommu_regions(struct device *dev,
PCI host has list of resource entries contain memory address range for which IOVA address mapping has to be reserve. These address ranges are the address holes in dma-ranges property. It is similar to PCI IO resources address range reserving in IOMMU for each EP connected to corresponding host. Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com> --- drivers/iommu/dma-iommu.c | 8 ++++++++ 1 file changed, 8 insertions(+)