Merge tag 'dma-mapping-6.4-2023-04-28' of git://git.infradead.org/users/hch/dma-mapping

[platform/kernel/linux-starfive.git] / include / linux / swiotlb.h

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 2ef25e6..7af2673 100644 (file)
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -87,6 +87,11 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
  * @for_alloc:  %true if the pool is used for memory allocation
  * @nareas:  The area number in the pool.
  * @area_nslabs: The slot number in the area.
+ * @total_used:        The total number of slots in the pool that are currently used
+ *             across all areas. Used only for calculating used_hiwater in
+ *             debugfs.
+ * @used_hiwater: The high water mark for total_used.  Used only for reporting
+ *             in debugfs.
  */
 struct io_tlb_mem {
        phys_addr_t start;
@@ -102,6 +107,10 @@ struct io_tlb_mem {
        unsigned int area_nslabs;
        struct io_tlb_area *areas;
        struct io_tlb_slot *slots;
+#ifdef CONFIG_DEBUG_FS
+       atomic_long_t total_used;
+       atomic_long_t used_hiwater;
+#endif
 };
 extern struct io_tlb_mem io_tlb_default_mem;