linux-kernel - [PATCH v2 03/12] iommu/amd: Make amd_iommu_pdom_id

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Message-ID: <20251001060954.5030-4-suravee.suthikulpanit@amd.com>
Date: Wed, 1 Oct 2025 06:09:45 +0000
From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To: <jgg@...dia.com>, <nicolinc@...dia.com>
CC: <linux-kernel@...r.kernel.org>, <robin.murphy@....com>, <will@...nel.org>,
	<joro@...tes.org>, <kevin.tian@...el.com>, <jsnitsel@...hat.com>,
	<vasant.hegde@....com>, <iommu@...ts.linux.dev>, <santosh.shukla@....com>,
	<sairaj.arunkodilkar@....com>, <jon.grimm@....com>,
	<prashanthpra@...gle.com>, <wvw@...gle.com>, <wnliu@...gle.com>,
	<gptran@...gle.com>, <kpsingh@...gle.com>, <joao.m.martins@...cle.com>,
	<alejandro.j.jimenez@...cle.com>, Suravee Suthikulpanit
	<suravee.suthikulpanit@....com>
Subject: [PATCH v2 03/12] iommu/amd: Make amd_iommu_pdom_id_free() non-static

To allow reuse in other files in subsequent patches.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
---
 drivers/iommu/amd/amd_iommu.h |  1 +
 drivers/iommu/amd/iommu.c     | 10 +++++-----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h
index 6ea549816a1f..322c8c73444a 100644
--- a/drivers/iommu/amd/amd_iommu.h
+++ b/drivers/iommu/amd/amd_iommu.h
@@ -27,6 +27,7 @@ void iommu_feature_enable(struct amd_iommu *iommu, u8 bit);
 void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu,
 				  gfp_t gfp, size_t size);
 int amd_iommu_pdom_id_alloc(void);
+void amd_iommu_pdom_id_free(int id);
 
 #ifdef CONFIG_AMD_IOMMU_DEBUGFS
 void amd_iommu_debugfs_setup(void);
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 78b3e5485006..0b61059e485d 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1823,7 +1823,7 @@ int amd_iommu_pdom_id_alloc(void)
 	return ida_alloc_range(&pdom_ids, 1, MAX_DOMAIN_ID - 1, GFP_ATOMIC);
 }
 
-static void pdom_id_free(int id)
+void amd_iommu_pdom_id_free(int id)
 {
 	ida_free(&pdom_ids, id);
 }
@@ -1870,7 +1870,7 @@ static void free_gcr3_table(struct gcr3_tbl_info *gcr3_info)
 	gcr3_info->glx = 0;
 
 	/* Free per device domain ID */
-	pdom_id_free(gcr3_info->domid);
+	amd_iommu_pdom_id_free(gcr3_info->domid);
 
 	iommu_free_pages(gcr3_info->gcr3_tbl);
 	gcr3_info->gcr3_tbl = NULL;
@@ -1913,7 +1913,7 @@ static int setup_gcr3_table(struct gcr3_tbl_info *gcr3_info,
 
 	gcr3_info->gcr3_tbl = iommu_alloc_pages_node_sz(nid, GFP_ATOMIC, SZ_4K);
 	if (gcr3_info->gcr3_tbl == NULL) {
-		pdom_id_free(domid);
+		amd_iommu_pdom_id_free(domid);
 		return -ENOMEM;
 	}
 
@@ -2573,7 +2573,7 @@ do_iommu_domain_alloc(struct device *dev, u32 flags,
 	domain->pd_mode = pgtable;
 	ret = pdom_setup_pgtable(domain, dev);
 	if (ret) {
-		pdom_id_free(domain->id);
+		amd_iommu_pdom_id_free(domain->id);
 		kfree(domain);
 		return ERR_PTR(ret);
 	}
@@ -2631,7 +2631,7 @@ void amd_iommu_domain_free(struct iommu_domain *dom)
 	WARN_ON(!list_empty(&domain->dev_list));
 	if (domain->domain.type & __IOMMU_DOMAIN_PAGING)
 		free_io_pgtable_ops(&domain->iop.pgtbl.ops);
-	pdom_id_free(domain->id);
+	amd_iommu_pdom_id_free(domain->id);
 	kfree(domain);
 }
 
-- 
2.34.1