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Subject[PATCH v4 4/9] iommu/vt-d: Move device_domain_info to header
Date
This allows the per device iommu data and some helpers to be
used in other files.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
---
drivers/iommu/intel-iommu.c | 63 +++------------------------------------------
include/linux/intel-iommu.h | 61 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 65 insertions(+), 59 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index dd5a617..d7d2ff9 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -380,61 +380,6 @@ static int hw_pass_through = 1;
for (idx = 0; idx < g_num_of_iommus; idx++) \
if (domain->iommu_refcnt[idx])

-struct dmar_domain {
- int nid; /* node id */
-
- unsigned iommu_refcnt[DMAR_UNITS_SUPPORTED];
- /* Refcount of devices per iommu */
-
-
- u16 iommu_did[DMAR_UNITS_SUPPORTED];
- /* Domain ids per IOMMU. Use u16 since
- * domain ids are 16 bit wide according
- * to VT-d spec, section 9.3 */
-
- bool has_iotlb_device;
- struct list_head devices; /* all devices' list */
- struct iova_domain iovad; /* iova's that belong to this domain */
-
- struct dma_pte *pgd; /* virtual address */
- int gaw; /* max guest address width */
-
- /* adjusted guest address width, 0 is level 2 30-bit */
- int agaw;
-
- int flags; /* flags to find out type of domain */
-
- int iommu_coherency;/* indicate coherency of iommu access */
- int iommu_snooping; /* indicate snooping control feature*/
- int iommu_count; /* reference count of iommu */
- int iommu_superpage;/* Level of superpages supported:
- 0 == 4KiB (no superpages), 1 == 2MiB,
- 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */
- u64 max_addr; /* maximum mapped address */
-
- struct iommu_domain domain; /* generic domain data structure for
- iommu core */
-};
-
-/* PCI domain-device relationship */
-struct device_domain_info {
- struct list_head link; /* link to domain siblings */
- struct list_head global; /* link to global list */
- u8 bus; /* PCI bus number */
- u8 devfn; /* PCI devfn number */
- u16 pfsid; /* SRIOV physical function source ID */
- u8 pasid_supported:3;
- u8 pasid_enabled:1;
- u8 pri_supported:1;
- u8 pri_enabled:1;
- u8 ats_supported:1;
- u8 ats_enabled:1;
- u8 ats_qdep;
- struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
- struct intel_iommu *iommu; /* IOMMU used by this device */
- struct dmar_domain *domain; /* pointer to domain */
-};
-
struct dmar_rmrr_unit {
struct list_head list; /* list of rmrr units */
struct acpi_dmar_header *hdr; /* ACPI header */
@@ -603,7 +548,7 @@ static void set_iommu_domain(struct intel_iommu *iommu, u16 did,
domains[did & 0xff] = domain;
}

-static inline void *alloc_pgtable_page(int node)
+void *alloc_pgtable_page(int node)
{
struct page *page;
void *vaddr = NULL;
@@ -614,7 +559,7 @@ static inline void *alloc_pgtable_page(int node)
return vaddr;
}

-static inline void free_pgtable_page(void *vaddr)
+void free_pgtable_page(void *vaddr)
{
free_page((unsigned long)vaddr);
}
@@ -697,7 +642,7 @@ int iommu_calculate_agaw(struct intel_iommu *iommu)
}

/* This functionin only returns single iommu in a domain */
-static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain)
+struct intel_iommu *domain_get_iommu(struct dmar_domain *domain)
{
int iommu_id;

@@ -3527,7 +3472,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
return iova_pfn;
}

-static struct dmar_domain *get_valid_domain_for_dev(struct device *dev)
+struct dmar_domain *get_valid_domain_for_dev(struct device *dev)
{
struct dmar_domain *domain, *tmp;
struct dmar_rmrr_unit *rmrr;
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 2ff1519..2e1fbde 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -31,6 +31,7 @@
#include <linux/list.h>
#include <linux/iommu.h>
#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/dmar.h>

#include <asm/cacheflush.h>
#include <asm/iommu.h>
@@ -387,6 +388,42 @@ struct pasid_entry;
struct pasid_state_entry;
struct page_req_dsc;

+struct dmar_domain {
+ int nid; /* node id */
+
+ unsigned iommu_refcnt[DMAR_UNITS_SUPPORTED];
+ /* Refcount of devices per iommu */
+
+
+ u16 iommu_did[DMAR_UNITS_SUPPORTED];
+ /* Domain ids per IOMMU. Use u16 since
+ * domain ids are 16 bit wide according
+ * to VT-d spec, section 9.3 */
+
+ bool has_iotlb_device;
+ struct list_head devices; /* all devices' list */
+ struct iova_domain iovad; /* iova's that belong to this domain */
+
+ struct dma_pte *pgd; /* virtual address */
+ int gaw; /* max guest address width */
+
+ /* adjusted guest address width, 0 is level 2 30-bit */
+ int agaw;
+
+ int flags; /* flags to find out type of domain */
+
+ int iommu_coherency;/* indicate coherency of iommu access */
+ int iommu_snooping; /* indicate snooping control feature*/
+ int iommu_count; /* reference count of iommu */
+ int iommu_superpage;/* Level of superpages supported:
+ 0 == 4KiB (no superpages), 1 == 2MiB,
+ 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */
+ u64 max_addr; /* maximum mapped address */
+
+ struct iommu_domain domain; /* generic domain data structure for
+ iommu core */
+};
+
struct intel_iommu {
void __iomem *reg; /* Pointer to hardware regs, virtual addr */
u64 reg_phys; /* physical address of hw register set */
@@ -435,6 +472,25 @@ struct intel_iommu {
u32 flags; /* Software defined flags */
};

+/* PCI domain-device relationship */
+struct device_domain_info {
+ struct list_head link; /* link to domain siblings */
+ struct list_head global; /* link to global list */
+ u8 bus; /* PCI bus number */
+ u8 devfn; /* PCI devfn number */
+ u16 pfsid; /* SRIOV physical function source ID */
+ u8 pasid_supported:3;
+ u8 pasid_enabled:1;
+ u8 pri_supported:1;
+ u8 pri_enabled:1;
+ u8 ats_supported:1;
+ u8 ats_enabled:1;
+ u8 ats_qdep;
+ struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
+ struct intel_iommu *iommu; /* IOMMU used by this device */
+ struct dmar_domain *domain; /* pointer to domain */
+};
+
static inline void __iommu_flush_cache(
struct intel_iommu *iommu, void *addr, int size)
{
@@ -460,6 +516,11 @@ extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);

extern int dmar_ir_support(void);

+struct dmar_domain *get_valid_domain_for_dev(struct device *dev);
+void *alloc_pgtable_page(int node);
+void free_pgtable_page(void *vaddr);
+struct intel_iommu *domain_get_iommu(struct dmar_domain *domain);
+
#ifdef CONFIG_INTEL_IOMMU_SVM
extern int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu);
extern int intel_svm_free_pasid_tables(struct intel_iommu *iommu);
--
2.7.4
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