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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, David Woodhouse <dwmw2@infradead.org>
Cc: ashok.raj@intel.com, sanjay.k.kumar@intel.com,
	jacob.jun.pan@intel.com, kevin.tian@intel.com,
	yi.l.liu@intel.com, yi.y.sun@intel.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v2 9/9] iommu/vt-d: Clean up PASID talbe management for SVM
Date: Fri,  4 May 2018 09:41:24 +0800	[thread overview]
Message-ID: <1525398084-28815-10-git-send-email-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <1525398084-28815-1-git-send-email-baolu.lu@linux.intel.com>

The previous per iommu pasid table alloc/free interfaces
are no longer used. Clean up the driver by removing it.

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 |  6 +++---
 drivers/iommu/intel-svm.c   | 17 ++---------------
 include/linux/intel-iommu.h |  5 ++---
 3 files changed, 7 insertions(+), 21 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index fa6052a..010871d 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1736,7 +1736,7 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
 	if (pasid_enabled(iommu)) {
 		if (ecap_prs(iommu->ecap))
 			intel_svm_finish_prq(iommu);
-		intel_svm_free_pasid_tables(iommu);
+		intel_svm_exit(iommu);
 	}
 #endif
 }
@@ -3297,7 +3297,7 @@ static int __init init_dmars(void)
 			hw_pass_through = 0;
 #ifdef CONFIG_INTEL_IOMMU_SVM
 		if (pasid_enabled(iommu))
-			intel_svm_alloc_pasid_tables(iommu);
+			intel_svm_init(iommu);
 #endif
 	}
 
@@ -4274,7 +4274,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
 
 #ifdef CONFIG_INTEL_IOMMU_SVM
 	if (pasid_enabled(iommu))
-		intel_svm_alloc_pasid_tables(iommu);
+		intel_svm_init(iommu);
 #endif
 
 	if (dmaru->ignored) {
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 3b14819..38cae65 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -34,7 +34,7 @@
 
 static irqreturn_t prq_event_thread(int irq, void *d);
 
-int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu)
+int intel_svm_init(struct intel_iommu *iommu)
 {
 	struct page *pages;
 	int order;
@@ -59,15 +59,6 @@ int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu)
 		iommu->pasid_max = 0x20000;
 
 	order = get_order(sizeof(struct pasid_entry) * iommu->pasid_max);
-	pages = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
-	if (!pages) {
-		pr_warn("IOMMU: %s: Failed to allocate PASID table\n",
-			iommu->name);
-		return -ENOMEM;
-	}
-	iommu->pasid_table = page_address(pages);
-	pr_info("%s: Allocated order %d PASID table.\n", iommu->name, order);
-
 	if (ecap_dis(iommu->ecap)) {
 		/* Just making it explicit... */
 		BUILD_BUG_ON(sizeof(struct pasid_entry) != sizeof(struct pasid_state_entry));
@@ -82,14 +73,10 @@ int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu)
 	return 0;
 }
 
-int intel_svm_free_pasid_tables(struct intel_iommu *iommu)
+int intel_svm_exit(struct intel_iommu *iommu)
 {
 	int order = get_order(sizeof(struct pasid_entry) * iommu->pasid_max);
 
-	if (iommu->pasid_table) {
-		free_pages((unsigned long)iommu->pasid_table, order);
-		iommu->pasid_table = NULL;
-	}
 	if (iommu->pasid_state_table) {
 		free_pages((unsigned long)iommu->pasid_state_table, order);
 		iommu->pasid_state_table = NULL;
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 08e5811..44c7613 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -470,7 +470,6 @@ struct intel_iommu {
 	 * devices away to userspace processes (e.g. for DPDK) and don't
 	 * want to trust that userspace will use *only* the PASID it was
 	 * told to. But while it's all driver-arbitrated, we're fine. */
-	struct pasid_entry *pasid_table;
 	struct pasid_state_entry *pasid_state_table;
 	struct page_req_dsc *prq;
 	unsigned char prq_name[16];    /* Name for PRQ interrupt */
@@ -539,8 +538,8 @@ 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);
+int intel_svm_init(struct intel_iommu *iommu);
+int intel_svm_exit(struct intel_iommu *iommu);
 extern int intel_svm_enable_prq(struct intel_iommu *iommu);
 extern int intel_svm_finish_prq(struct intel_iommu *iommu);
 
-- 
2.7.4

  parent reply	other threads:[~2018-05-04  1:51 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-04  1:41 [PATCH v2 0/9] iommu/vt-d: Improve PASID id and table management Lu Baolu
2018-05-04  1:41 ` [PATCH v2 1/9] iommu/vt-d: Global PASID name space Lu Baolu
2018-05-04  1:41 ` [PATCH v2 2/9] iommu/vt-d: Decouple idr bond pointer from svm Lu Baolu
2018-05-04  1:41 ` [PATCH v2 3/9] iommu/vt-d: Use global PASID for SVM usage Lu Baolu
2018-05-04  1:41 ` [PATCH v2 4/9] iommu/vt-d: Move device_domain_info to header Lu Baolu
2018-05-04  1:41 ` [PATCH v2 5/9] iommu/vt-d: Per domain pasid table interfaces Lu Baolu
2018-05-04  1:41 ` [PATCH v2 6/9] iommu/vt-d: Allocate and free pasid table Lu Baolu
2018-05-04  1:41 ` [PATCH v2 7/9] iommu/vt-d: Calculate PTS value Lu Baolu
2018-05-04  1:41 ` [PATCH v2 8/9] iommu/vt-d: Use per-domain pasid table Lu Baolu
2018-05-04  1:41 ` Lu Baolu [this message]
2018-05-15 14:11 ` [PATCH v2 0/9] iommu/vt-d: Improve PASID id and table management Joerg Roedel
2018-05-16  8:01   ` Lu Baolu
2018-05-16  8:56     ` Tian, Kevin
2018-05-17  1:13       ` Lu Baolu
2018-05-29 11:56     ` Joerg Roedel
2018-05-30  0:56       ` Lu Baolu

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