Re: [PATCH v12 3/5] iommu/vt-d: simplify parameters of qi_submit_sync() ATS invalidation callers

From: Yi Liu
Date: Mon Jan 29 2024 - 04:35:36 EST

On 2024/1/29 11:49, Ethan Zhao wrote:
fold parameters back to struct device_domain_info *info instead of extract
and pass them, thus decrease the number of the parameter passed for
following functions

qi_flush_dev_iotlb()
qi_flush_dev_iotlb_pasid()
quirk_extra_dev_tlb_flush()

no function change.

Signed-off-by: Ethan Zhao <haifeng.zhao@xxxxxxxxxxxxxxx>
---
drivers/iommu/intel/dmar.c | 26 ++++++++++++++++++++++----
drivers/iommu/intel/iommu.c | 29 +++++++----------------------
drivers/iommu/intel/iommu.h | 17 ++++++++---------
drivers/iommu/intel/nested.c | 9 ++-------
drivers/iommu/intel/pasid.c | 9 ++-------
drivers/iommu/intel/svm.c | 17 ++++++++---------
6 files changed, 49 insertions(+), 58 deletions(-)

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 23cb80d62a9a..ab5e1760bd59 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1517,11 +1517,20 @@ void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
qi_submit_sync(iommu, &desc, 1, 0);
}
-void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
- u16 qdep, u64 addr, unsigned mask)
+void qi_flush_dev_iotlb(struct intel_iommu *iommu,
+ struct device_domain_info *info, u64 addr,

If you want to fold the parameters, why iommu is left? info also includes
iommu pointer.

+ unsigned int mask)
{
+ u16 sid, qdep, pfsid;
struct qi_desc desc;
+ if (!info || !info->ats_enabled)
+ return;
+
+ sid = info->bus << 8 | info->devfn;
+ qdep = info->ats_qdep;
+ pfsid = info->pfsid;
+
/*
* VT-d spec, section 4.3:
*
@@ -1590,11 +1599,20 @@ void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
}
/* PASID-based device IOTLB Invalidate */
-void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
- u32 pasid, u16 qdep, u64 addr, unsigned int size_order)
+void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu,
+ struct device_domain_info *info, u64 addr, u32 pasid,
+ unsigned int size_order)
{
unsigned long mask = 1UL << (VTD_PAGE_SHIFT + size_order - 1);
struct qi_desc desc = {.qw1 = 0, .qw2 = 0, .qw3 = 0};
+ u16 sid, qdep, pfsid;
+
+ if (!info || !dev_is_pci(info->dev))
+ return;
+
+ sid = info->bus << 8 | info->devfn;
+ qdep = info->ats_qdep;
+ pfsid = info->pfsid;
/*
* VT-d spec, section 4.3:
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 6fb5f6fceea1..e5902944b3db 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1310,16 +1310,11 @@ static void iommu_disable_pci_caps(struct device_domain_info *info)
static void __iommu_flush_dev_iotlb(struct device_domain_info *info,
u64 addr, unsigned int mask)
{
- u16 sid, qdep;
-
if (!info || !info->ats_enabled)
return;
- sid = info->bus << 8 | info->devfn;
- qdep = info->ats_qdep;
- qi_flush_dev_iotlb(info->iommu, sid, info->pfsid,
- qdep, addr, mask);
- quirk_extra_dev_tlb_flush(info, addr, mask, IOMMU_NO_PASID, qdep);
+ qi_flush_dev_iotlb(info->iommu, info, addr, mask);
+ quirk_extra_dev_tlb_flush(info, addr, IOMMU_NO_PASID, mask);
}
static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
@@ -1342,11 +1337,7 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
if (!info->ats_enabled)
continue;
- qi_flush_dev_iotlb_pasid(info->iommu,
- PCI_DEVID(info->bus, info->devfn),
- info->pfsid, dev_pasid->pasid,
- info->ats_qdep, addr,
- mask);
+ qi_flush_dev_iotlb_pasid(info->iommu, info, addr, dev_pasid->pasid, mask);
}
spin_unlock_irqrestore(&domain->lock, flags);
}
@@ -4990,22 +4981,16 @@ static void __init check_tylersburg_isoch(void)
*
* As a reminder, #6 will *NEED* this quirk as we enable nested translation.
*/
-void quirk_extra_dev_tlb_flush(struct device_domain_info *info,
- unsigned long address, unsigned long mask,
- u32 pasid, u16 qdep)
+void quirk_extra_dev_tlb_flush(struct device_domain_info *info, u32 pasid,
+ unsigned long address, unsigned long mask)
{
- u16 sid;
-
if (likely(!info->dtlb_extra_inval))
return;
- sid = PCI_DEVID(info->bus, info->devfn);
if (pasid == IOMMU_NO_PASID) {
- qi_flush_dev_iotlb(info->iommu, sid, info->pfsid,
- qdep, address, mask);
+ qi_flush_dev_iotlb(info->iommu, info, address, mask);
} else {
- qi_flush_dev_iotlb_pasid(info->iommu, sid, info->pfsid,
- pasid, qdep, address, mask);
+ qi_flush_dev_iotlb_pasid(info->iommu, info, address, pasid, mask);
}
}
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index d02f916d8e59..f68f17476d85 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -1037,18 +1037,17 @@ void qi_flush_context(struct intel_iommu *iommu, u16 did,
u16 sid, u8 fm, u64 type);
void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type);
-void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
- u16 qdep, u64 addr, unsigned mask);
-
+void qi_flush_dev_iotlb(struct intel_iommu *iommu,
+ struct device_domain_info *info, u64 addr,
+ unsigned int mask);
void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
unsigned long npages, bool ih);
-void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
- u32 pasid, u16 qdep, u64 addr,
- unsigned int size_order);
-void quirk_extra_dev_tlb_flush(struct device_domain_info *info,
- unsigned long address, unsigned long pages,
- u32 pasid, u16 qdep);
+void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu,
+ struct device_domain_info *info, u64 addr,
+ u32 pasid, unsigned int size_order);
+void quirk_extra_dev_tlb_flush(struct device_domain_info *info, u32 pasid,
+ unsigned long address, unsigned long mask);
void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did, u64 granu,
u32 pasid);
diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c
index f26c7f1c46cc..d15f72b55940 100644
--- a/drivers/iommu/intel/nested.c
+++ b/drivers/iommu/intel/nested.c
@@ -78,18 +78,13 @@ static void nested_flush_dev_iotlb(struct dmar_domain *domain, u64 addr,
{
struct device_domain_info *info;
unsigned long flags;
- u16 sid, qdep;
spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry(info, &domain->devices, link) {
if (!info->ats_enabled)
continue;
- sid = info->bus << 8 | info->devfn;
- qdep = info->ats_qdep;
- qi_flush_dev_iotlb(info->iommu, sid, info->pfsid,
- qdep, addr, mask);
- quirk_extra_dev_tlb_flush(info, addr, mask,
- IOMMU_NO_PASID, qdep);
+ qi_flush_dev_iotlb(info->iommu, info, addr, mask);
+ quirk_extra_dev_tlb_flush(info, IOMMU_NO_PASID, addr, mask);
}
spin_unlock_irqrestore(&domain->lock, flags);
}
diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index 953592125e4a..5dacdea3cab7 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -208,7 +208,6 @@ devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
struct device *dev, u32 pasid)
{
struct device_domain_info *info;
- u16 sid, qdep, pfsid;
info = dev_iommu_priv_get(dev);
if (!info || !info->ats_enabled)
@@ -217,10 +216,6 @@ devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
if (pci_dev_is_disconnected(to_pci_dev(dev)))
return;
- sid = info->bus << 8 | info->devfn;
- qdep = info->ats_qdep;
- pfsid = info->pfsid;
-
/*
* When PASID 0 is used, it indicates RID2PASID(DMA request w/o PASID),
* devTLB flush w/o PASID should be used. For non-zero PASID under
@@ -228,9 +223,9 @@ devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
* efficient to flush devTLB specific to the PASID.
*/
if (pasid == IOMMU_NO_PASID)
- qi_flush_dev_iotlb(iommu, sid, pfsid, qdep, 0, 64 - VTD_PAGE_SHIFT);
+ qi_flush_dev_iotlb(iommu, info, 0, 64 - VTD_PAGE_SHIFT);
else
- qi_flush_dev_iotlb_pasid(iommu, sid, pfsid, pasid, qdep, 0, 64 - VTD_PAGE_SHIFT);
+ qi_flush_dev_iotlb_pasid(iommu, info, 0, pasid, 64 - VTD_PAGE_SHIFT);
}
void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev,
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 40edd282903f..89168b31bf31 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -181,11 +181,10 @@ static void __flush_svm_range_dev(struct intel_svm *svm,
qi_flush_piotlb(sdev->iommu, sdev->did, svm->pasid, address, pages, ih);
if (info->ats_enabled) {
- qi_flush_dev_iotlb_pasid(sdev->iommu, sdev->sid, info->pfsid,
- svm->pasid, sdev->qdep, address,
+ qi_flush_dev_iotlb_pasid(sdev->iommu, info, address, svm->pasid,
order_base_2(pages));
- quirk_extra_dev_tlb_flush(info, address, order_base_2(pages),
- svm->pasid, sdev->qdep);
+ quirk_extra_dev_tlb_flush(info, svm->pasid, address,
+ order_base_2(pages));
}
}
@@ -227,11 +226,11 @@ static void intel_flush_svm_all(struct intel_svm *svm)
qi_flush_piotlb(sdev->iommu, sdev->did, svm->pasid, 0, -1UL, 0);
if (info->ats_enabled) {
- qi_flush_dev_iotlb_pasid(sdev->iommu, sdev->sid, info->pfsid,
- svm->pasid, sdev->qdep,
- 0, 64 - VTD_PAGE_SHIFT);
- quirk_extra_dev_tlb_flush(info, 0, 64 - VTD_PAGE_SHIFT,
- svm->pasid, sdev->qdep);
+ qi_flush_dev_iotlb_pasid(sdev->iommu, info, 0,
+ svm->pasid,
+ 64 - VTD_PAGE_SHIFT);
+ quirk_extra_dev_tlb_flush(info, svm->pasid, 0,
+ 64 - VTD_PAGE_SHIFT);
}
}
rcu_read_unlock();

--
Regards,
Yi Liu