[PATCH v2 2/2] remoteproc: debug: add carveouts list dump feature

[Loic Pallardy]

This patch offers the capability to dump memory carveouts associated
to one remoteprocessor.

Signed-off-by: Loic Pallardy <loic.palla...@st.com>
---
V2 :
- Fix 0-DAY reported issues on open function prototype

 drivers/remoteproc/remoteproc_debugfs.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_debugfs.c 
b/drivers/remoteproc/remoteproc_debugfs.c
index dc5e259..a204883 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -252,6 +252,35 @@ static int rproc_rsc_table_open(struct inode *inode, 
struct file *file)
        .release        = single_release,
 };
 
+/* Expose carveout content via debugfs */
+static int rproc_carveouts_show(struct seq_file *seq, void *p)
+{
+       struct rproc *rproc = seq->private;
+       struct rproc_mem_entry *carveout;
+
+       list_for_each_entry(carveout, &rproc->carveouts, node) {
+               seq_puts(seq, "Carveout memory entry:\n");
+               seq_printf(seq, "\tVirtual address: %p\n", carveout->va);
+               seq_printf(seq, "\tDMA address: %pad\n", &carveout->dma);
+               seq_printf(seq, "\tDevice address: 0x%x\n", carveout->da);
+               seq_printf(seq, "\tLength: 0x%x Bytes\n\n", carveout->len);
+       }
+
+       return 0;
+}
+
+static int rproc_carveouts_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, rproc_carveouts_show, inode->i_private);
+}
+
+static const struct file_operations rproc_carveouts_ops = {
+       .open           = rproc_carveouts_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
 void rproc_remove_trace_file(struct dentry *tfile)
 {
        debugfs_remove(tfile);
@@ -297,6 +326,8 @@ void rproc_create_debug_dir(struct rproc *rproc)
                            rproc, &rproc_recovery_ops);
        debugfs_create_file("resource_table", 0400, rproc->dbg_dir,
                            rproc, &rproc_rsc_table_ops);
+       debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir,
+                           rproc, &rproc_carveouts_ops);
 }
 
 void __init rproc_init_debugfs(void)
-- 
1.9.1