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iommu/dma: Add HW MSI(GICv3 ITS) address regions reservation

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Modified iommu_dma_get_resv_regions() to include GICv3 ITS
region on ACPI based ARM platfiorms which may require HW MSI
reservations.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Shameer Kolothum 2018-02-13 15:20:51 +00:00 committed by Joerg Roedel
parent 8b4282e6b8
commit f51dc89265
1 changed files with 7 additions and 1 deletions
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8
drivers/iommu/dma-iommu.c
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@ -19,6 +19,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
#include <linux/acpi_iort.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/dma-iommu.h> #include <linux/dma-iommu.h>
#include <linux/gfp.h> #include <linux/gfp.h>
@ -167,13 +168,18 @@ EXPORT_SYMBOL(iommu_put_dma_cookie);
* *
* IOMMU drivers can use this to implement their .get_resv_regions callback * IOMMU drivers can use this to implement their .get_resv_regions callback
* for general non-IOMMU-specific reservations. Currently, this covers host * for general non-IOMMU-specific reservations. Currently, this covers host
* bridge windows for PCI devices. * bridge windows for PCI devices and GICv3 ITS region reservation on ACPI
* based ARM platforms that may require HW MSI reservation.
*/ */
void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
{ {
struct pci_host_bridge *bridge; struct pci_host_bridge *bridge;
struct resource_entry *window; struct resource_entry *window;
if (!is_of_node(dev->iommu_fwspec->iommu_fwnode) &&
iort_iommu_msi_get_resv_regions(dev, list) < 0)
return;
if (!dev_is_pci(dev)) if (!dev_is_pci(dev))
return; return;