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Date: Mon, 6 Nov 2017 18:09:55 +0100
From: Loic Pallardy <loic.pallardy@...com>
To: <bjorn.andersson@...aro.org>, <ohad@...ery.com>
CC: <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<arnaud.pouliquen@...com>, <benjamin.gaignard@...aro.org>,
Loic Pallardy <loic.pallardy@...com>
Subject: [PATCH v2 1/2] remoteproc: debug: add resource table dump feature
This patch adds the capability to display the content of
the resource table associated to a remote processor firmware.
Signed-off-by: Loic Pallardy <loic.pallardy@...com>
---
V2 :
- Fix 0-DAY reported issues on open function prototype
drivers/remoteproc/remoteproc_debugfs.c | 99 +++++++++++++++++++++++++++++++++
1 file changed, 99 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index 1c122e2..dc5e259 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -155,6 +155,103 @@ static ssize_t rproc_recovery_read(struct file *filp, char __user *userbuf,
.llseek = generic_file_llseek,
};
+/* Expose resource table content via debugfs */
+static int rproc_rsc_table_show(struct seq_file *seq, void *p)
+{
+ static const char * const types[] = {"carveout", "devmem", "trace", "vdev"};
+ struct rproc *rproc = seq->private;
+ struct resource_table *table = rproc->table_ptr;
+ struct fw_rsc_carveout *c;
+ struct fw_rsc_devmem *d;
+ struct fw_rsc_trace *t;
+ struct fw_rsc_vdev *v;
+ int i, j;
+
+ if (!table) {
+ seq_puts(seq, "No resource table found\n");
+ return 0;
+ }
+
+ for (i = 0; i < table->num; i++) {
+ int offset = table->offset[i];
+ struct fw_rsc_hdr *hdr = (void *)table + offset;
+ void *rsc = (void *)hdr + sizeof(*hdr);
+
+ switch (hdr->type) {
+ case RSC_CARVEOUT:
+ c = rsc;
+ seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+ seq_printf(seq, " Device Address 0x%x\n", c->da);
+ seq_printf(seq, " Physical Address 0x%x\n", c->pa);
+ seq_printf(seq, " Length 0x%x Bytes\n", c->len);
+ seq_printf(seq, " Flags 0x%x\n", c->flags);
+ seq_printf(seq, " Reserved (should be zero) [%d]\n", c->reserved);
+ seq_printf(seq, " Name %s\n\n", c->name);
+ break;
+ case RSC_DEVMEM:
+ d = rsc;
+ seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+ seq_printf(seq, " Device Address 0x%x\n", d->da);
+ seq_printf(seq, " Physical Address 0x%x\n", d->pa);
+ seq_printf(seq, " Length 0x%x Bytes\n", d->len);
+ seq_printf(seq, " Flags 0x%x\n", d->flags);
+ seq_printf(seq, " Reserved (should be zero) [%d]\n", d->reserved);
+ seq_printf(seq, " Name %s\n\n", d->name);
+ break;
+ case RSC_TRACE:
+ t = rsc;
+ seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+ seq_printf(seq, " Device Address 0x%x\n", t->da);
+ seq_printf(seq, " Length 0x%x Bytes\n", t->len);
+ seq_printf(seq, " Reserved (should be zero) [%d]\n", t->reserved);
+ seq_printf(seq, " Name %s\n\n", t->name);
+ break;
+ case RSC_VDEV:
+ v = rsc;
+ seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+
+ seq_printf(seq, " ID %d\n", v->id);
+ seq_printf(seq, " Notify ID %d\n", v->notifyid);
+ seq_printf(seq, " Device features 0x%x\n", v->dfeatures);
+ seq_printf(seq, " Guest features 0x%x\n", v->gfeatures);
+ seq_printf(seq, " Config length 0x%x\n", v->config_len);
+ seq_printf(seq, " Status 0x%x\n", v->status);
+ seq_printf(seq, " Number of vrings %d\n", v->num_of_vrings);
+ seq_printf(seq, " Reserved (should be zero) [%d][%d]\n\n",
+ v->reserved[0], v->reserved[1]);
+
+ for (j = 0; j < v->num_of_vrings; j++) {
+ seq_printf(seq, " Vring %d\n", j);
+ seq_printf(seq, " Device Address 0x%x\n", v->vring[j].da);
+ seq_printf(seq, " Alignment %d\n", v->vring[j].align);
+ seq_printf(seq, " Number of buffers %d\n", v->vring[j].num);
+ seq_printf(seq, " Notify ID %d\n", v->vring[j].notifyid);
+ seq_printf(seq, " Physical Address 0x%x\n\n",
+ v->vring[j].pa);
+ }
+ break;
+ default:
+ seq_printf(seq, "Unknown resource type found: %d [hdr: %p]\n",
+ hdr->type, hdr);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int rproc_rsc_table_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rproc_rsc_table_show, inode->i_private);
+}
+
+static const struct file_operations rproc_rsc_table_ops = {
+ .open = rproc_rsc_table_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
void rproc_remove_trace_file(struct dentry *tfile)
{
debugfs_remove(tfile);
@@ -198,6 +295,8 @@ void rproc_create_debug_dir(struct rproc *rproc)
rproc, &rproc_name_ops);
debugfs_create_file("recovery", 0400, rproc->dbg_dir,
rproc, &rproc_recovery_ops);
+ debugfs_create_file("resource_table", 0400, rproc->dbg_dir,
+ rproc, &rproc_rsc_table_ops);
}
void __init rproc_init_debugfs(void)
--
1.9.1
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