mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-03 15:47:36 +00:00
Code Issues Releases Wiki Activity

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

Browse source 
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: Steven Price <steven.price@arm.com>
Tested-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220615101044.1972-6-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Shameer Kolothum 2022-06-15 11:10:40 +01:00 committed by Joerg Roedel
parent 491cf4a673
commit e302eea8f4
2 changed files with 36 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
drivers/acpi/arm64/iort.c
View file

@ -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)

8
include/linux/acpi_iort.h
View file

@ -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; }