diff options
| author | Isaac J. Manjarres <isaacmanjarres@google.com> | 2023-12-09 02:41:40 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-12-15 11:04:16 +0300 |
| commit | a63c357b9fd56ad5fe64616f5b22835252c6a76a (patch) | |
| tree | 9e2a148bf94a03ad4fb794e2598265ebf720a13c /drivers/iommu | |
| parent | bf9cd9fef9f15531680325f956f81317d46a159d (diff) | |
| download | linux-a63c357b9fd56ad5fe64616f5b22835252c6a76a.tar.xz | |
iommu/dma: Trace bounce buffer usage when mapping buffers
When commit 82612d66d51d ("iommu: Allow the dma-iommu api to
use bounce buffers") was introduced, it did not add the logic
for tracing the bounce buffer usage from iommu_dma_map_page().
All of the users of swiotlb_tbl_map_single() trace their bounce
buffer usage, except iommu_dma_map_page(). This makes it difficult
to track SWIOTLB usage from that function. Thus, trace bounce buffer
usage from iommu_dma_map_page().
Fixes: 82612d66d51d ("iommu: Allow the dma-iommu api to use bounce buffers")
Cc: stable@vger.kernel.org # v5.15+
Cc: Tom Murphy <murphyt7@tcd.ie>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Saravana Kannan <saravanak@google.com>
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>
Link: https://lore.kernel.org/r/20231208234141.2356157-1-isaacmanjarres@google.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/dma-iommu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 85163a83df2f..037fcf826407 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -29,6 +29,7 @@ #include <linux/spinlock.h> #include <linux/swiotlb.h> #include <linux/vmalloc.h> +#include <trace/events/swiotlb.h> #include "dma-iommu.h" @@ -1156,6 +1157,8 @@ static dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page, return DMA_MAPPING_ERROR; } + trace_swiotlb_bounced(dev, phys, size); + aligned_size = iova_align(iovad, size); phys = swiotlb_tbl_map_single(dev, phys, size, aligned_size, iova_mask(iovad), dir, attrs); |