iommu/amd: Declare functions as extern

And move declaration to header file so that they can be included across
multiple files. There is no functional change.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20201215073705.123786-6-suravee.suthikulpanit@amd.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd/amd_iommu.h

@@ -57,6 +57,9 @@ extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
 extern int amd_iommu_flush_page(struct iommu_domain *dom, u32 pasid,
 				u64 address);
 extern void amd_iommu_update_and_flush_device_table(struct protection_domain *domain);
+extern void amd_iommu_domain_update(struct protection_domain *domain);
+extern void amd_iommu_domain_flush_complete(struct protection_domain *domain);
+extern void amd_iommu_domain_flush_tlb_pde(struct protection_domain *domain);
 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid);
 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, u32 pasid,
 				     unsigned long cr3);

drivers/iommu/amd/iommu.c

@@ -86,7 +86,6 @@ struct iommu_cmd {
 
 struct kmem_cache *amd_iommu_irq_cache;
 
-static void update_domain(struct protection_domain *domain);
 static void detach_device(struct device *dev);
 
 /****************************************************************************
@@ -1313,12 +1312,12 @@ static void domain_flush_pages(struct protection_domain *domain,
 }
 
 /* Flush the whole IO/TLB for a given protection domain - including PDE */
-static void domain_flush_tlb_pde(struct protection_domain *domain)
+void amd_iommu_domain_flush_tlb_pde(struct protection_domain *domain)
 {
 	__domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1);
 }
 
-static void domain_flush_complete(struct protection_domain *domain)
+void amd_iommu_domain_flush_complete(struct protection_domain *domain)
 {
 	int i;
 
@@ -1343,7 +1342,7 @@ static void domain_flush_np_cache(struct protection_domain *domain,
 
 		spin_lock_irqsave(&domain->lock, flags);
 		domain_flush_pages(domain, iova, size);
-		domain_flush_complete(domain);
+		amd_iommu_domain_flush_complete(domain);
 		spin_unlock_irqrestore(&domain->lock, flags);
 	}
 }
@@ -1500,7 +1499,7 @@ static bool increase_address_space(struct protection_domain *domain,
 	pgtable.root  = pte;
 	pgtable.mode += 1;
 	amd_iommu_update_and_flush_device_table(domain);
-	domain_flush_complete(domain);
+	amd_iommu_domain_flush_complete(domain);
 
 	/*
 	 * Device Table needs to be updated and flushed before the new root can
@@ -1753,8 +1752,8 @@ static int iommu_map_page(struct protection_domain *dom,
 		 * Updates and flushing already happened in
 		 * increase_address_space().
 		 */
-		domain_flush_tlb_pde(dom);
-		domain_flush_complete(dom);
+		amd_iommu_domain_flush_tlb_pde(dom);
+		amd_iommu_domain_flush_complete(dom);
 		spin_unlock_irqrestore(&dom->lock, flags);
 	}
 
@@ -1997,10 +1996,10 @@ static void do_detach(struct iommu_dev_data *dev_data)
 	device_flush_dte(dev_data);
 
 	/* Flush IOTLB */
-	domain_flush_tlb_pde(domain);
+	amd_iommu_domain_flush_tlb_pde(domain);
 
 	/* Wait for the flushes to finish */
-	domain_flush_complete(domain);
+	amd_iommu_domain_flush_complete(domain);
 
 	/* decrease reference counters - needs to happen after the flushes */
 	domain->dev_iommu[iommu->index] -= 1;
@@ -2133,9 +2132,9 @@ static int attach_device(struct device *dev,
 	 * left the caches in the IOMMU dirty. So we have to flush
 	 * here to evict all dirty stuff.
 	 */
-	domain_flush_tlb_pde(domain);
+	amd_iommu_domain_flush_tlb_pde(domain);
 
-	domain_flush_complete(domain);
+	amd_iommu_domain_flush_complete(domain);
 
 out:
 	spin_unlock(&dev_data->lock);
@@ -2297,7 +2296,7 @@ void amd_iommu_update_and_flush_device_table(struct protection_domain *domain)
 	domain_flush_devices(domain);
 }
 
-static void update_domain(struct protection_domain *domain)
+void amd_iommu_domain_update(struct protection_domain *domain)
 {
 	struct domain_pgtable pgtable;
 
@@ -2306,8 +2305,8 @@ static void update_domain(struct protection_domain *domain)
 	amd_iommu_update_and_flush_device_table(domain);
 
 	/* Flush domain TLB(s) and wait for completion */
-	domain_flush_tlb_pde(domain);
-	domain_flush_complete(domain);
+	amd_iommu_domain_flush_tlb_pde(domain);
+	amd_iommu_domain_flush_complete(domain);
 }
 
 int __init amd_iommu_init_api(void)
@@ -2695,8 +2694,8 @@ static void amd_iommu_flush_iotlb_all(struct iommu_domain *domain)
 	unsigned long flags;
 
 	spin_lock_irqsave(&dom->lock, flags);
-	domain_flush_tlb_pde(dom);
-	domain_flush_complete(dom);
+	amd_iommu_domain_flush_tlb_pde(dom);
+	amd_iommu_domain_flush_complete(dom);
 	spin_unlock_irqrestore(&dom->lock, flags);
 }
 
@@ -2786,7 +2785,7 @@ void amd_iommu_domain_direct_map(struct iommu_domain *dom)
 	amd_iommu_domain_clr_pt_root(domain);
 
 	/* Make changes visible to IOMMUs */
-	update_domain(domain);
+	amd_iommu_domain_update(domain);
 
 	/* Page-table is not visible to IOMMU anymore, so free it */
 	free_pagetable(&pgtable);
@@ -2830,7 +2829,7 @@ int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids)
 	domain->glx      = levels;
 	domain->flags   |= PD_IOMMUV2_MASK;
 
-	update_domain(domain);
+	amd_iommu_domain_update(domain);
 
 	ret = 0;
 
@@ -2867,7 +2866,7 @@ static int __flush_pasid(struct protection_domain *domain, u32 pasid,
 	}
 
 	/* Wait until IOMMU TLB flushes are complete */
-	domain_flush_complete(domain);
+	amd_iommu_domain_flush_complete(domain);
 
 	/* Now flush device TLBs */
 	list_for_each_entry(dev_data, &domain->dev_list, list) {
@@ -2893,7 +2892,7 @@ static int __flush_pasid(struct protection_domain *domain, u32 pasid,
 	}
 
 	/* Wait until all device TLBs are flushed */
-	domain_flush_complete(domain);
+	amd_iommu_domain_flush_complete(domain);
 
 	ret = 0;