Commit e302eea8 authored by Shameer Kolothum's avatar Shameer Kolothum Committed by Joerg Roedel
Browse files

ACPI/IORT: Add a helper to retrieve RMR info directly 



This will provide a way for SMMU drivers to retrieve StreamIDs
associated with IORT RMR nodes and use that to set bypass settings
for those IDs.

Tested-by: default avatarSteven Price <steven.price@arm.com>
Tested-by: default avatarLaurentiu Tudor <laurentiu.tudor@nxp.com>
Tested-by: default avatarHanjun Guo <guohanjun@huawei.com>
Reviewed-by: default avatarHanjun Guo <guohanjun@huawei.com>
Signed-off-by: default avatarShameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: default avatarRobin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220615101044.1972-6-shameerali.kolothum.thodi@huawei.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 491cf4a6

drivers/acpi/arm64/iort.c

+28 −0
Original line number Diff line number Diff line
@@ -1394,6 +1394,34 @@ int iort_dma_get_ranges(struct device *dev, u64 *size) 
		return nc_dma_get_range(dev, size);

}



/**

 * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with

 *                     associated StreamIDs information.

 * @iommu_fwnode: fwnode associated with IOMMU

 * @head: Resereved region list

 */

void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,

		       struct list_head *head)

{

	iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head);

}

EXPORT_SYMBOL_GPL(iort_get_rmr_sids);



/**

 * iort_put_rmr_sids - Free memory allocated for RMR reserved regions.

 * @iommu_fwnode: fwnode associated with IOMMU

 * @head: Resereved region list

 */

void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,

		       struct list_head *head)

{

	struct iommu_resv_region *entry, *next;



	list_for_each_entry_safe(entry, next, head, list)

		entry->free(NULL, entry);

}

EXPORT_SYMBOL_GPL(iort_put_rmr_sids);



static void __init acpi_iort_register_irq(int hwirq, const char *name,

					  int trigger,

					  struct resource *res)

include/linux/acpi_iort.h

+8 −0
Original line number Diff line number Diff line
@@ -33,6 +33,10 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 id, 
					  enum irq_domain_bus_token bus_token);

void acpi_configure_pmsi_domain(struct device *dev);

int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);

void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,

		       struct list_head *head);

void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,

		       struct list_head *head);

/* IOMMU interface */

int iort_dma_get_ranges(struct device *dev, u64 *size);

int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
@@ -46,6 +50,10 @@ static inline struct irq_domain *iort_get_device_domain( 
	struct device *dev, u32 id, enum irq_domain_bus_token bus_token)

{ return NULL; }

static inline void acpi_configure_pmsi_domain(struct device *dev) { }

static inline

void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { }

static inline

void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { }

/* IOMMU interface */

static inline int iort_dma_get_ranges(struct device *dev, u64 *size)

{ return -ENODEV; }