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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Subject: [PATCH 17/19] iommu/vt-d: Add get_domain_info() helper
Date: Sun,  5 Apr 2020 16:30:51 +0800	[thread overview]
Message-ID: <20200405083053.17865-18-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20200405083053.17865-1-baolu.lu@linux.intel.com>

Add a get_domain_info() helper to retrieve the valid per-device
iommu private data.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/iommu/intel-iommu.c | 38 +++++++++++++++++++++++++------------
 drivers/iommu/intel-pasid.c | 12 ++++++------
 drivers/iommu/intel-svm.c   |  2 +-
 include/linux/intel-iommu.h |  1 +
 4 files changed, 34 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 087cf8a701f6..3c82fcb50ee7 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -365,6 +365,21 @@ EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped);
 
 #define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1))
 #define DEFER_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-2))
+struct device_domain_info *get_domain_info(struct device *dev)
+{
+	struct device_domain_info *info;
+
+	if (!dev)
+		return NULL;
+
+	info = dev->archdata.iommu;
+	if (unlikely(info == DUMMY_DEVICE_DOMAIN_INFO ||
+		     info == DEFER_DEVICE_DOMAIN_INFO))
+		return NULL;
+
+	return info;
+}
+
 DEFINE_SPINLOCK(device_domain_lock);
 static LIST_HEAD(device_domain_list);
 
@@ -2430,7 +2445,7 @@ struct dmar_domain *find_domain(struct device *dev)
 		dev = &pci_real_dma_dev(to_pci_dev(dev))->dev;
 
 	/* No lock here, assumes no domain exit in normal case */
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (likely(info))
 		return info->domain;
 
@@ -5012,9 +5027,8 @@ static void dmar_remove_one_dev_info(struct device *dev)
 	unsigned long flags;
 
 	spin_lock_irqsave(&device_domain_lock, flags);
-	info = dev->archdata.iommu;
-	if (info && info != DEFER_DEVICE_DOMAIN_INFO
-	    && info != DUMMY_DEVICE_DOMAIN_INFO)
+	info = get_domain_info(dev);
+	if (info)
 		__dmar_remove_one_dev_info(info);
 	spin_unlock_irqrestore(&device_domain_lock, flags);
 }
@@ -5104,7 +5118,7 @@ static void intel_iommu_domain_free(struct iommu_domain *domain)
 static inline bool
 is_aux_domain(struct device *dev, struct iommu_domain *domain)
 {
-	struct device_domain_info *info = dev->archdata.iommu;
+	struct device_domain_info *info = get_domain_info(dev);
 
 	return info && info->auxd_enabled &&
 			domain->type == IOMMU_DOMAIN_UNMANAGED;
@@ -5113,7 +5127,7 @@ is_aux_domain(struct device *dev, struct iommu_domain *domain)
 static void auxiliary_link_device(struct dmar_domain *domain,
 				  struct device *dev)
 {
-	struct device_domain_info *info = dev->archdata.iommu;
+	struct device_domain_info *info = get_domain_info(dev);
 
 	assert_spin_locked(&device_domain_lock);
 	if (WARN_ON(!info))
@@ -5126,7 +5140,7 @@ static void auxiliary_link_device(struct dmar_domain *domain,
 static void auxiliary_unlink_device(struct dmar_domain *domain,
 				    struct device *dev)
 {
-	struct device_domain_info *info = dev->archdata.iommu;
+	struct device_domain_info *info = get_domain_info(dev);
 
 	assert_spin_locked(&device_domain_lock);
 	if (WARN_ON(!info))
@@ -5214,7 +5228,7 @@ static void aux_domain_remove_dev(struct dmar_domain *domain,
 		return;
 
 	spin_lock_irqsave(&device_domain_lock, flags);
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	iommu = info->iommu;
 
 	auxiliary_unlink_device(domain, dev);
@@ -5780,7 +5794,7 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev)
 	spin_lock(&iommu->lock);
 
 	ret = -EINVAL;
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!info || !info->pasid_supported)
 		goto out;
 
@@ -5876,7 +5890,7 @@ static int intel_iommu_enable_auxd(struct device *dev)
 		return -ENODEV;
 
 	spin_lock_irqsave(&device_domain_lock, flags);
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	info->auxd_enabled = 1;
 	spin_unlock_irqrestore(&device_domain_lock, flags);
 
@@ -5889,7 +5903,7 @@ static int intel_iommu_disable_auxd(struct device *dev)
 	unsigned long flags;
 
 	spin_lock_irqsave(&device_domain_lock, flags);
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!WARN_ON(!info))
 		info->auxd_enabled = 0;
 	spin_unlock_irqrestore(&device_domain_lock, flags);
@@ -5966,7 +5980,7 @@ intel_iommu_dev_disable_feat(struct device *dev, enum iommu_dev_features feat)
 static bool
 intel_iommu_dev_feat_enabled(struct device *dev, enum iommu_dev_features feat)
 {
-	struct device_domain_info *info = dev->archdata.iommu;
+	struct device_domain_info *info = get_domain_info(dev);
 
 	if (feat == IOMMU_DEV_FEAT_AUX)
 		return scalable_mode_support() && info && info->auxd_enabled;
diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
index 8da1b4162a82..503231a1ce60 100644
--- a/drivers/iommu/intel-pasid.c
+++ b/drivers/iommu/intel-pasid.c
@@ -151,7 +151,7 @@ int intel_pasid_alloc_table(struct device *dev)
 	int size;
 
 	might_sleep();
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (WARN_ON(!info || !dev_is_pci(dev) || info->pasid_table))
 		return -EINVAL;
 
@@ -198,7 +198,7 @@ void intel_pasid_free_table(struct device *dev)
 	struct pasid_entry *table;
 	int i, max_pde;
 
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!info || !dev_is_pci(dev) || !info->pasid_table)
 		return;
 
@@ -224,7 +224,7 @@ struct pasid_table *intel_pasid_get_table(struct device *dev)
 {
 	struct device_domain_info *info;
 
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!info)
 		return NULL;
 
@@ -235,7 +235,7 @@ int intel_pasid_get_dev_max_id(struct device *dev)
 {
 	struct device_domain_info *info;
 
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!info || !info->pasid_table)
 		return 0;
 
@@ -256,7 +256,7 @@ struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid)
 		return NULL;
 
 	dir = pasid_table->table;
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	dir_index = pasid >> PASID_PDE_SHIFT;
 	index = pasid & PASID_PTE_MASK;
 
@@ -522,7 +522,7 @@ devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
 	struct device_domain_info *info;
 	u16 sid, qdep, pfsid;
 
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!info || !info->ats_enabled)
 		return;
 
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index a0e30267667a..81a7e77de6b4 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -507,7 +507,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
 		goto out;
 	}
 
-	info = dev->archdata.iommu;
+	info = get_domain_info(dev);
 	if (!info || !info->pasid_supported) {
 		kfree(sdev);
 		goto out;
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 4038fa3d837a..28e4aa2296fa 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -714,6 +714,7 @@ int for_each_device_domain(int (*fn)(struct device_domain_info *info,
 void iommu_flush_write_buffer(struct intel_iommu *iommu);
 int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev);
 struct dmar_domain *find_domain(struct device *dev);
+struct device_domain_info *get_domain_info(struct device *dev);
 
 #ifdef CONFIG_INTEL_IOMMU_SVM
 extern void intel_svm_check(struct intel_iommu *iommu);
-- 
2.17.1

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  parent reply	other threads:[~2020-04-05  8:34 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-05  8:30 [PATCH 00/19] [PULL REQUEST] iommu/vt-d: patches for v5.7 Lu Baolu
2020-04-05  8:30 ` [PATCH 01/19] iommu: Add def_domain_type() callback in iommu_ops Lu Baolu
2020-04-05  8:30 ` [PATCH 02/19] iommu: Configure default domain with def_domain_type Lu Baolu
2020-04-05  8:30 ` [PATCH 03/19] iommu/vt-d: Don't force 32bit devices to uses DMA domain Lu Baolu
2020-04-05  8:30 ` [PATCH 04/19] iommu/vt-d: Don't force PCI sub-hierarchy to use " Lu Baolu
2020-04-05  8:30 ` [PATCH 05/19] iommu/vt-d: Add def_domain_type callback Lu Baolu
2020-04-05  8:30 ` [PATCH 06/19] iommu/vt-d: Apply per-device dma_ops Lu Baolu
2020-04-05  8:30 ` [PATCH 07/19] iommu/vt-d: Move domain helper to header Lu Baolu
2020-04-05  8:30 ` [PATCH 08/19] iommu/uapi: Define a mask for bind data Lu Baolu
2020-04-05  8:30 ` [PATCH 09/19] iommu/vt-d: Use a helper function to skip agaw for SL Lu Baolu
2020-04-05  8:30 ` [PATCH 10/19] iommu/vt-d: Add nested translation helper function Lu Baolu
2020-04-05  8:30 ` [PATCH 11/19] iommu/vt-d: Add bind guest PASID support Lu Baolu
2020-04-05  8:30 ` [PATCH 12/19] iommu/vt-d: Support flushing more translation cache types Lu Baolu
2020-04-05  8:30 ` [PATCH 13/19] iommu/vt-d: Add svm/sva invalidate function Lu Baolu
2020-04-05  8:30 ` [PATCH 14/19] iommu/vt-d: Cache virtual command capability register Lu Baolu
2020-04-05  8:30 ` [PATCH 15/19] iommu/vt-d: Enlightened PASID allocation Lu Baolu
2020-04-05  8:30 ` [PATCH 16/19] iommu/vt-d: Add custom allocator for IOASID Lu Baolu
2020-04-05  8:30 ` Lu Baolu [this message]
2020-04-05  8:30 ` [PATCH 18/19] iommu/vt-d: Report SVA feature with generic flag Lu Baolu
2020-04-05  8:30 ` [PATCH 19/19] iommu/vt-d: Replace intel SVM APIs with generic SVA APIs Lu Baolu
2020-04-06 13:36 ` [PATCH 00/19] [PULL REQUEST] iommu/vt-d: patches for v5.7 Christoph Hellwig
2020-04-07  0:09   ` Lu Baolu

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