Having the cacheline also printed on the debug_dma_dump_mappings() and
dump_show() is useful for debugging. Furthermore, this also standardizes
the messages shown on both dump functions.
Signed-off-by: Desnes Nunes <desnesn@xxxxxxxxxx>
---
kernel/dma/debug.c | 122 ++++++++++++++++++++++++---------------------
1 file changed, 64 insertions(+), 58 deletions(-)
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index e0ad8db1ec25..19cc59829ffd 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -396,37 +396,6 @@ static unsigned long long phys_addr(struct dma_debug_entry *entry)
return page_to_phys(pfn_to_page(entry->pfn)) + entry->offset;
}
-/*
- * Dump mapping entries for debugging purposes
- */
-void debug_dma_dump_mappings(struct device *dev)
-{
- int idx;
-
- for (idx = 0; idx < HASH_SIZE; idx++) {
- struct hash_bucket *bucket = &dma_entry_hash[idx];
- struct dma_debug_entry *entry;
- unsigned long flags;
-
- spin_lock_irqsave(&bucket->lock, flags);
-
- list_for_each_entry(entry, &bucket->list, list) {
- if (!dev || dev == entry->dev) {
- dev_info(entry->dev,
- "%s idx %d P=%Lx N=%lx D=%Lx L=%Lx %s %s\n",
- type2name[entry->type], idx,
- phys_addr(entry), entry->pfn,
- entry->dev_addr, entry->size,
- dir2name[entry->direction],
- maperr2str[entry->map_err_type]);
- }
- }
-
- spin_unlock_irqrestore(&bucket->lock, flags);
- cond_resched();
- }
-}
-
/*
* For each mapping (initial cacheline in the case of
* dma_alloc_coherent/dma_map_page, initial cacheline in each page of a
@@ -547,6 +516,70 @@ static void active_cacheline_remove(struct dma_debug_entry *entry)
spin_unlock_irqrestore(&radix_lock, flags);
}
+/*
+ * Dump mappings entries on kernel space for debugging purposes
+ */
+void debug_dma_dump_mappings(struct device *dev)
+{
+ int idx;
+ phys_addr_t cln;
+
+ for (idx = 0; idx < HASH_SIZE; idx++) {
+ struct hash_bucket *bucket = &dma_entry_hash[idx];
+ struct dma_debug_entry *entry;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bucket->lock, flags);
+ list_for_each_entry(entry, &bucket->list, list) {
+ if (!dev || dev == entry->dev) {
+ cln = to_cacheline_number(entry);
+ dev_info(entry->dev,
+ "%s idx %d P=%llx N=%lx D=%llx L=%llx cln=%llx %s %s\n",
+ type2name[entry->type], idx,
+ phys_addr(entry), entry->pfn,
+ entry->dev_addr, entry->size,
+ cln, dir2name[entry->direction],
+ maperr2str[entry->map_err_type]);
+ }
+ }
+ spin_unlock_irqrestore(&bucket->lock, flags);
+
+ cond_resched();
+ }
+}
+
+/*
+ * Dump mappings entries on user space via debugfs
+ */
+static int dump_show(struct seq_file *seq, void *v)
+{
+ int idx;
+ phys_addr_t cln;
+
+ for (idx = 0; idx < HASH_SIZE; idx++) {
+ struct hash_bucket *bucket = &dma_entry_hash[idx];
+ struct dma_debug_entry *entry;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bucket->lock, flags);
+ list_for_each_entry(entry, &bucket->list, list) {
+ cln = to_cacheline_number(entry);
+ seq_printf(seq,
+ "%s %s %s idx %d P=%llx N=%lx D=%llx L=%llx cln=%llx %s %s\n",
+ dev_driver_string(entry->dev),
+ dev_name(entry->dev),
+ type2name[entry->type], idx,
+ phys_addr(entry), entry->pfn,
+ entry->dev_addr, entry->size,
+ cln, dir2name[entry->direction],
+ maperr2str[entry->map_err_type]);
+ }
+ spin_unlock_irqrestore(&bucket->lock, flags);
+ }
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(dump);
+
/*
* Wrapper function for adding an entry to the hash.
* This function takes care of locking itself.
@@ -765,33 +798,6 @@ static const struct file_operations filter_fops = {
.llseek = default_llseek,
};
-static int dump_show(struct seq_file *seq, void *v)
-{
- int idx;
-
- for (idx = 0; idx < HASH_SIZE; idx++) {
- struct hash_bucket *bucket = &dma_entry_hash[idx];
- struct dma_debug_entry *entry;
- unsigned long flags;
-
- spin_lock_irqsave(&bucket->lock, flags);
- list_for_each_entry(entry, &bucket->list, list) {
- seq_printf(seq,
- "%s %s %s idx %d P=%llx N=%lx D=%llx L=%llx %s %s\n",
- dev_name(entry->dev),
- dev_driver_string(entry->dev),
- type2name[entry->type], idx,
- phys_addr(entry), entry->pfn,
- entry->dev_addr, entry->size,
- dir2name[entry->direction],
- maperr2str[entry->map_err_type]);
- }
- spin_unlock_irqrestore(&bucket->lock, flags);
- }
- return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(dump);
-
static int __init dma_debug_fs_init(void)
{
struct dentry *dentry = debugfs_create_dir("dma-api", NULL);
--
2.39.1
