| Message ID | 1484127714-3263-5-git-send-email-eric.auger@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 11.01.2017 10:41, Eric Auger wrote: > Introduce a new helper serving the purpose to allocate a reserved > region. This will be used in iommu driver implementing reserved > region callbacks. > > Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Thanks, Tomasz > > --- > > v3 -> v4: > - add INIT_LIST_HEAD(®ion->list) > - use int for prot param and add int type param > - remove implementation outside of CONFIG_IOMMU_API > --- > drivers/iommu/iommu.c | 18 ++++++++++++++++++ > include/linux/iommu.h | 2 ++ > 2 files changed, 20 insertions(+) > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > index 1cee5c3..927878d 100644 > --- a/drivers/iommu/iommu.c > +++ b/drivers/iommu/iommu.c > @@ -1575,6 +1575,24 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) > ops->put_resv_regions(dev, list); > } > > +struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, > + size_t length, > + int prot, int type) > +{ > + struct iommu_resv_region *region; > + > + region = kzalloc(sizeof(*region), GFP_KERNEL); > + if (!region) > + return NULL; > + > + INIT_LIST_HEAD(®ion->list); > + region->start = start; > + region->length = length; > + region->prot = prot; > + region->type = type; > + return region; > +} > + > /* Request that a device is direct mapped by the IOMMU */ > int iommu_request_dm_for_dev(struct device *dev) > { > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > index 233a6bf..f6bb55d3 100644 > --- a/include/linux/iommu.h > +++ b/include/linux/iommu.h > @@ -244,6 +244,8 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, > extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); > extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); > extern int iommu_request_dm_for_dev(struct device *dev); > +extern struct iommu_resv_region * > +iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, int type); > > extern int iommu_attach_group(struct iommu_domain *domain, > struct iommu_group *group); >
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 1cee5c3..927878d 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1575,6 +1575,24 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) ops->put_resv_regions(dev, list); } +struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, + size_t length, + int prot, int type) +{ + struct iommu_resv_region *region; + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) + return NULL; + + INIT_LIST_HEAD(®ion->list); + region->start = start; + region->length = length; + region->prot = prot; + region->type = type; + return region; +} + /* Request that a device is direct mapped by the IOMMU */ int iommu_request_dm_for_dev(struct device *dev) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 233a6bf..f6bb55d3 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -244,6 +244,8 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); +extern struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, int type); extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group);
Introduce a new helper serving the purpose to allocate a reserved region. This will be used in iommu driver implementing reserved region callbacks. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- v3 -> v4: - add INIT_LIST_HEAD(®ion->list) - use int for prot param and add int type param - remove implementation outside of CONFIG_IOMMU_API --- drivers/iommu/iommu.c | 18 ++++++++++++++++++ include/linux/iommu.h | 2 ++ 2 files changed, 20 insertions(+)