Add a dma_ranges field in PCI host bridge structure to hold resource
entries list of memory regions in sorted order representing memory
ranges that can be accessed through DMA transactions.
Based-on-patch-by: Oza Pawandeep <oza.oza@xxxxxxxxxxxx>
Signed-off-by: Srinath Mannam <srinath.mannam@xxxxxxxxxxxx>
[lorenzo.pieralisi@xxxxxxx: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Reviewed-by: Oza Pawandeep <poza@xxxxxxxxxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
---
drivers/pci/probe.c | 3 +++
include/linux/pci.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 7e12d01..72563c1 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -595,6 +595,7 @@ struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)
return NULL;
INIT_LIST_HEAD(&bridge->windows);
+ INIT_LIST_HEAD(&bridge->dma_ranges);
bridge->dev.release = pci_release_host_bridge_dev;
/*
@@ -623,6 +624,7 @@ struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
return NULL;
INIT_LIST_HEAD(&bridge->windows);
+ INIT_LIST_HEAD(&bridge->dma_ranges);
bridge->dev.release = devm_pci_release_host_bridge_dev;
return bridge;
@@ -632,6 +634,7 @@ EXPORT_SYMBOL(devm_pci_alloc_host_bridge);
void pci_free_host_bridge(struct pci_host_bridge *bridge)
{
pci_free_resource_list(&bridge->windows);
+ pci_free_resource_list(&bridge->dma_ranges);
kfree(bridge);
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7744821..bba0a29 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -490,6 +490,7 @@ struct pci_host_bridge {
void *sysdata;
int busnr;
struct list_head windows; /* resource_entry */
+ struct list_head dma_ranges; /* dma ranges resource list */
u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
int (*map_irq)(const struct pci_dev *, u8, u8);
void (*release_fn)(struct pci_host_bridge *);
--
2.7.4
