1 files changed, 28 insertions, 5 deletions

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 1661af593914..fa2dc4e5f9ba 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -156,6 +156,32 @@ static dma_addr_t swiotlb_sg_to_bus(struct scatterlist *sg)
         return swiotlb_phys_to_bus(page_to_phys(sg_page(sg)) + sg->offset);
 }
 
+static void swiotlb_print_info(unsigned long bytes)
+{
+        phys_addr_t pstart, pend;
+        dma_addr_t bstart, bend;
+
+        pstart = virt_to_phys(io_tlb_start);
+        pend = virt_to_phys(io_tlb_end);
+
+        bstart = swiotlb_phys_to_bus(pstart);
+        bend = swiotlb_phys_to_bus(pend);
+
+        printk(KERN_INFO "Placing %luMB software IO TLB between %p - %p\n",
+               bytes >> 20, io_tlb_start, io_tlb_end);
+        if (pstart != bstart || pend != bend)
+                printk(KERN_INFO "software IO TLB at phys %#llx - %#llx"
+                       " bus %#llx - %#llx\n",
+                       (unsigned long long)pstart,
+                       (unsigned long long)pend,
+                       (unsigned long long)bstart,
+                       (unsigned long long)bend);
+        else
+                printk(KERN_INFO "software IO TLB at phys %#llx - %#llx\n",
+                       (unsigned long long)pstart,
+                       (unsigned long long)pend);
+}
+
 /*
  * Statically reserve bounce buffer space and initialize bounce buffer data
  * structures for the software IO TLB used to implement the DMA API.
@@ -198,8 +224,7 @@ swiotlb_init_with_default_size(size_t default_size)
         if (!io_tlb_overflow_buffer)
                 panic("Cannot allocate SWIOTLB overflow buffer!\n");
 
-        printk(KERN_INFO "Placing software IO TLB between 0x%lx - 0x%lx\n",
-               swiotlb_virt_to_bus(io_tlb_start), swiotlb_virt_to_bus(io_tlb_end));
+        swiotlb_print_info(bytes);
 }
 
 void __init
@@ -279,9 +304,7 @@ swiotlb_late_init_with_default_size(size_t default_size)
         if (!io_tlb_overflow_buffer)
                 goto cleanup4;
 
-        printk(KERN_INFO "Placing %luMB software IO TLB between 0x%lx - "
-               "0x%lx\n", bytes >> 20,
-               swiotlb_virt_to_bus(io_tlb_start), swiotlb_virt_to_bus(io_tlb_end));
+        swiotlb_print_info(bytes);
 
         return 0;