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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@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Loic Pallardy 2017-11-06 18:09:55 +01:00 committed by Bjorn Andersson
parent 9f058fa2ef
commit bdd8edb9b0
1 changed files with 99 additions and 0 deletions
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99
drivers/remoteproc/remoteproc_debugfs.c
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@ -155,6 +155,103 @@ static const struct file_operations rproc_recovery_ops = {
.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)