提交 5774f7c5 编写于 作者: J Joerg Roedel

AMD IOMMU: add statistics about allocated io memory

Impact: see amount of allocated io memory in debugfs
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
上级 18811f55
......@@ -74,6 +74,7 @@ DECLARE_STATS_COUNTER(cnt_free_coherent);
DECLARE_STATS_COUNTER(cross_page);
DECLARE_STATS_COUNTER(domain_flush_single);
DECLARE_STATS_COUNTER(domain_flush_all);
DECLARE_STATS_COUNTER(alloced_io_mem);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
......@@ -110,6 +111,7 @@ static void amd_iommu_stats_init(void)
amd_iommu_stats_add(&cross_page);
amd_iommu_stats_add(&domain_flush_single);
amd_iommu_stats_add(&domain_flush_all);
amd_iommu_stats_add(&alloced_io_mem);
}
#endif
......@@ -1246,6 +1248,8 @@ static dma_addr_t __map_single(struct device *dev,
}
address += offset;
ADD_STATS_COUNTER(alloced_io_mem, size);
if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {
iommu_flush_tlb(iommu, dma_dom->domain.id);
dma_dom->need_flush = false;
......@@ -1282,6 +1286,8 @@ static void __unmap_single(struct amd_iommu *iommu,
start += PAGE_SIZE;
}
SUB_STATS_COUNTER(alloced_io_mem, size);
dma_ops_free_addresses(dma_dom, dma_addr, pages);
if (amd_iommu_unmap_flush || dma_dom->need_flush) {
......
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