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Commit 8bef2bfc authored by Mitchel Humpherys's avatar Mitchel Humpherys
Browse files

msm: iommu: add some more convenience domain-finding functions 



Some common usage patterns have emerged among users of the MSM IOMMU
driver:

    -> find a group by group name
      `--> find a domain by group

and:

    -> find a group by group name
      `--> find a domain by group
          `--> find domain number by domain

Add some helper functions to make those use cases more convenient and
slightly less error prone.

Change-Id: Iad5f315436d600d960ab900de0beae7bd3904257
Signed-off-by: default avatarMitchel Humpherys <mitchelh@codeaurora.org>
parent 16103798

drivers/iommu/msm_iommu_domains.c

+18 −0
Original line number Diff line number Diff line
@@ -348,6 +348,24 @@ int msm_find_domain_no(const struct iommu_domain *domain) 
}

EXPORT_SYMBOL(msm_find_domain_no);



struct iommu_domain *msm_iommu_domain_find(const char *name)

{

	struct iommu_group *group = iommu_group_find(name);

	if (!group)

		return NULL;

	return iommu_group_get_iommudata(group);

}

EXPORT_SYMBOL(msm_iommu_domain_find);



int msm_iommu_domain_no_find(const char *name)

{

	struct iommu_domain *domain = msm_iommu_domain_find(name);

	if (!domain)

		return -EINVAL;

	return msm_find_domain_no(domain);

}

EXPORT_SYMBOL(msm_iommu_domain_no_find);



static struct msm_iova_data *msm_domain_to_iova_data(struct iommu_domain

						     const *domain)

{

include/linux/msm_iommu_domains.h

+4 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.

/* Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -92,6 +92,9 @@ extern void msm_iommu_set_client_name(struct iommu_domain *domain, 
				      char const *name);

extern struct iommu_domain *msm_get_iommu_domain(int domain_num);

extern int msm_find_domain_no(const struct iommu_domain *domain);

extern struct iommu_domain *msm_iommu_domain_find(const char *name);

extern int msm_iommu_domain_no_find(const char *name);





extern int msm_allocate_iova_address(unsigned int iommu_domain,

					unsigned int partition_no,