iommu/vt-d: Add trace events for device dma map/unmap

This adds trace support for the Intel IOMMU driver. It
also declares some events which could be used to trace
the events when an IOVA is being mapped or unmapped in
a domain.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0af7b4669264..12831beead02 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3512,6 +3512,9 @@ static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr,
 
         start_paddr = (phys_addr_t)iova_pfn << PAGE_SHIFT;
         start_paddr += paddr & ~PAGE_MASK;
+
+        trace_map_single(dev, start_paddr, paddr, size << VTD_PAGE_SHIFT);
+
         return start_paddr;
 
 error:
@@ -3567,10 +3570,7 @@ static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size)
         if (dev_is_pci(dev))
                 pdev = to_pci_dev(dev);
 
-        dev_dbg(dev, "Device unmapping: pfn %lx-%lx\n", start_pfn, last_pfn);
-
         freelist = domain_unmap(domain, start_pfn, last_pfn);
-
         if (intel_iommu_strict || (pdev && pdev->untrusted) ||
                         !has_iova_flush_queue(&domain->iovad)) {
                 iommu_flush_iotlb_psi(iommu, domain, start_pfn,
@@ -3586,6 +3586,8 @@ static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size)
                  * cpu used up by the iotlb flush operation...
                  */
         }
+
+        trace_unmap_single(dev, dev_addr, size);
 }
 
 static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
@@ -3676,6 +3678,8 @@ static void intel_unmap_sg(struct device *dev, struct scatterlist *sglist,
         }
 
         intel_unmap(dev, startaddr, nrpages << VTD_PAGE_SHIFT);
+
+        trace_unmap_sg(dev, startaddr, nrpages << VTD_PAGE_SHIFT);
 }
 
 static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nelems,
@@ -3732,6 +3736,9 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele
                 return 0;
         }
 
+        trace_map_sg(dev, iova_pfn << PAGE_SHIFT,
+                     sg_phys(sglist), size << VTD_PAGE_SHIFT);
+
         return nelems;
 }