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From: Ethan Zhao <haifeng.zhao@linux.intel.com>
To: baolu.lu@linux.intel.com,
	bhelgaas@google.com,
	robin.murphy@arm.com,
	jgg@ziepe.ca
Cc: kevin.tian@intel.com,
	dwmw2@infradead.org,
	will@kernel.org,
	lukas@wunner.de,
	yi.l.liu@intel.com,
	iommu@lists.linux.dev,
	linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org,
	Ethan Zhao <haifeng.zhao@linux.intel.com>
Subject: [PATCH v12 4/5] iommu/vt-d: pass pdev parameter for qi_check_fault() and refactor callers
Date: Sun, 28 Jan 2024 22:49:23 -0500
Message-Id: <20240129034924.817005-5-haifeng.zhao@linux.intel.com>
In-Reply-To: <20240129034924.817005-1-haifeng.zhao@linux.intel.com>
References: <20240129034924.817005-1-haifeng.zhao@linux.intel.com>
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to check state of ATS capable pci device in qi_check_fault() for surprise
removal case, we need to pass the target pci device of ATS invalidation
request to qi_check_fault(). if pdev is valid, means current request is for
ATS invalidation, vice vesa.

no function change.

Signed-off-by: Ethan Zhao <haifeng.zhao@linux.intel.com>
---
 drivers/iommu/intel/dmar.c          | 31 ++++++++++++++++++-----------
 drivers/iommu/intel/iommu.h         |  3 ++-
 drivers/iommu/intel/irq_remapping.c |  2 +-
 drivers/iommu/intel/pasid.c         |  2 +-
 drivers/iommu/intel/svm.c           |  6 +++---
 5 files changed, 26 insertions(+), 18 deletions(-)

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index ab5e1760bd59..814134e9aa5a 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1267,7 +1267,8 @@ static void qi_dump_fault(struct intel_iommu *iommu, u32 fault)
 	       (unsigned long long)desc->qw1);
 }
 
-static int qi_check_fault(struct intel_iommu *iommu, int index, int wait_index)
+static int qi_check_fault(struct intel_iommu *iommu, int index, int wait_index,
+			  struct pci_dev *pdev)
 {
 	u32 fault;
 	int head, tail;
@@ -1344,7 +1345,8 @@ static int qi_check_fault(struct intel_iommu *iommu, int index, int wait_index)
  * can be part of the submission but it will not be polled for completion.
  */
 int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc,
-		   unsigned int count, unsigned long options)
+		   unsigned int count, unsigned long options,
+		   struct pci_dev *pdev)
 {
 	struct q_inval *qi = iommu->qi;
 	s64 devtlb_start_ktime = 0;
@@ -1430,7 +1432,7 @@ int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc,
 		 * a deadlock where the interrupt context can wait indefinitely
 		 * for free slots in the queue.
 		 */
-		rc = qi_check_fault(iommu, index, wait_index);
+		rc = qi_check_fault(iommu, index, wait_index, pdev);
 		if (rc)
 			break;
 
@@ -1476,7 +1478,7 @@ void qi_global_iec(struct intel_iommu *iommu)
 	desc.qw3 = 0;
 
 	/* should never fail */
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm,
@@ -1490,7 +1492,7 @@ void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm,
 	desc.qw2 = 0;
 	desc.qw3 = 0;
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
@@ -1514,23 +1516,27 @@ void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
 	desc.qw2 = 0;
 	desc.qw3 = 0;
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 void qi_flush_dev_iotlb(struct intel_iommu *iommu,
 			struct device_domain_info *info, u64 addr,
 			unsigned int mask)
 {
+	struct pci_dev *pdev = NULL;
 	u16 sid, qdep, pfsid;
 	struct qi_desc desc;
 
 	if (!info || !info->ats_enabled)
 		return;
 
+	if (info->dev || !dev_is_pci(info->dev))
+		return;
+
+	pdev = to_pci_dev(info->dev);
 	sid = info->bus << 8 | info->devfn;
 	qdep = info->ats_qdep;
 	pfsid = info->pfsid;
-
 	/*
 	 * VT-d spec, section 4.3:
 	 *
@@ -1554,7 +1560,7 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu,
 	desc.qw2 = 0;
 	desc.qw3 = 0;
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, pdev);
 }
 
 /* PASID-based IOTLB invalidation */
@@ -1595,7 +1601,7 @@ void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
 				QI_EIOTLB_AM(mask);
 	}
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 /* PASID-based device IOTLB Invalidate */
@@ -1605,15 +1611,16 @@ void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu,
 {
 	unsigned long mask = 1UL << (VTD_PAGE_SHIFT + size_order - 1);
 	struct qi_desc desc = {.qw1 = 0, .qw2 = 0, .qw3 = 0};
+	struct pci_dev *pdev = NULL;
 	u16 sid, qdep, pfsid;
 
 	if (!info || !dev_is_pci(info->dev))
 		return;
 
+	pdev = to_pci_dev(info->dev);
 	sid = info->bus << 8 | info->devfn;
 	qdep = info->ats_qdep;
 	pfsid = info->pfsid;
-
 	/*
 	 * VT-d spec, section 4.3:
 	 *
@@ -1657,7 +1664,7 @@ void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu,
 		desc.qw1 |= QI_DEV_EIOTLB_SIZE;
 	}
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, pdev);
 }
 
 void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did,
@@ -1667,7 +1674,7 @@ void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did,
 
 	desc.qw0 = QI_PC_PASID(pasid) | QI_PC_DID(did) |
 			QI_PC_GRAN(granu) | QI_PC_TYPE;
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 /*
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index f68f17476d85..72e1d5fb2114 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -1052,7 +1052,8 @@ void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did, u64 granu,
 			  u32 pasid);
 
 int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc,
-		   unsigned int count, unsigned long options);
+		   unsigned int count, unsigned long options,
+		   struct pci_dev *pdev);
 /*
  * Options used in qi_submit_sync:
  * QI_OPT_WAIT_DRAIN - Wait for PRQ drain completion, spec 6.5.2.8.
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 566297bc87dd..09276bfa127d 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -153,7 +153,7 @@ static int qi_flush_iec(struct intel_iommu *iommu, int index, int mask)
 	desc.qw2 = 0;
 	desc.qw3 = 0;
 
-	return qi_submit_sync(iommu, &desc, 1, 0);
+	return qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 static int modify_irte(struct irq_2_iommu *irq_iommu,
diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index 5dacdea3cab7..8bba5721aeba 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -200,7 +200,7 @@ pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
 	desc.qw2 = 0;
 	desc.qw3 = 0;
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 static void
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 89168b31bf31..c2f4f3822191 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -538,7 +538,7 @@ void intel_drain_pasid_prq(struct device *dev, u32 pasid)
 			QI_DEV_IOTLB_PFSID(info->pfsid);
 qi_retry:
 	reinit_completion(&iommu->prq_complete);
-	qi_submit_sync(iommu, desc, 3, QI_OPT_WAIT_DRAIN);
+	qi_submit_sync(iommu, desc, 3, QI_OPT_WAIT_DRAIN, NULL);
 	if (readl(iommu->reg + DMAR_PRS_REG) & DMA_PRS_PRO) {
 		wait_for_completion(&iommu->prq_complete);
 		goto qi_retry;
@@ -641,7 +641,7 @@ static void handle_bad_prq_event(struct intel_iommu *iommu,
 		desc.qw3 = 0;
 	}
 
-	qi_submit_sync(iommu, &desc, 1, 0);
+	qi_submit_sync(iommu, &desc, 1, 0, NULL);
 }
 
 static irqreturn_t prq_event_thread(int irq, void *d)
@@ -797,7 +797,7 @@ int intel_svm_page_response(struct device *dev,
 				ktime_to_ns(ktime_get()) - prm->private_data[0]);
 		}
 
-		qi_submit_sync(iommu, &desc, 1, 0);
+		qi_submit_sync(iommu, &desc, 1, 0, NULL);
 	}
 out:
 	return ret;
-- 
2.31.1