remoteproc: debug: add carveouts list dump feature

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

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index dc5e25943df7..a20488336aa0 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -252,6 +252,35 @@ static const struct file_operations rproc_rsc_table_ops = {
         .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)