Commit e80a91ad authored by Srinath Mannam's avatar Srinath Mannam Committed by Bjorn Helgaas
Browse files

PCI: Add dma_ranges window list 



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-a-patch-by: default avatarOza Pawandeep <oza.oza@broadcom.com>
Signed-off-by: default avatarSrinath Mannam <srinath.mannam@broadcom.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarOza Pawandeep <poza@codeaurora.org>
Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 9e98c678

drivers/pci/probe.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

}

include/linux/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *);

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