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authorLoic Pallardy <loic.pallardy@st.com>2019-01-10 14:49:10 +0100
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-02-20 21:34:18 -0800
commita987e6b91a5ac0e08782506b1f879e37dab3b605 (patch)
treed52a79f360cc9e6beab7ff0d05857fa79857cc80 /drivers/remoteproc
parent60f849a5c1537d28dca28b68697dcc82f3fa44e1 (diff)
downloadlinux-a987e6b91a5ac0e08782506b1f879e37dab3b605.tar.gz
remoteproc: fix trace buffer va initialization
With rproc_alloc_registered_carveouts() introduction, carveouts are allocated after resource table parsing. rproc_da_to_va() may return NULL at trace resource registering. This patch modifies trace debufs registering to provide device address (da) instead of va. da to va translation is done at each trace buffer access through debugfs interface. Fixes: d7c51706d095 ("remoteproc: add alloc ops in rproc_mem_entry struct") Signed-off-by: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/remoteproc_core.c35
-rw-r--r--drivers/remoteproc/remoteproc_debugfs.c21
-rw-r--r--drivers/remoteproc/remoteproc_internal.h9
3 files changed, 40 insertions, 25 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index f8a3da1bdc19..16cd54324246 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -608,9 +608,8 @@ void rproc_vdev_release(struct kref *ref)
static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
int offset, int avail)
{
- struct rproc_mem_entry *trace;
+ struct rproc_debug_trace *trace;
struct device *dev = &rproc->dev;
- void *ptr;
char name[15];
if (sizeof(*rsc) > avail) {
@@ -624,28 +623,23 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
return -EINVAL;
}
- /* what's the kernel address of this resource ? */
- ptr = rproc_da_to_va(rproc, rsc->da, rsc->len);
- if (!ptr) {
- dev_err(dev, "erroneous trace resource entry\n");
- return -EINVAL;
- }
-
trace = kzalloc(sizeof(*trace), GFP_KERNEL);
if (!trace)
return -ENOMEM;
/* set the trace buffer dma properties */
- trace->len = rsc->len;
- trace->va = ptr;
+ trace->trace_mem.len = rsc->len;
+ trace->trace_mem.da = rsc->da;
+
+ /* set pointer on rproc device */
+ trace->rproc = rproc;
/* make sure snprintf always null terminates, even if truncating */
snprintf(name, sizeof(name), "trace%d", rproc->num_traces);
/* create the debugfs entry */
- trace->priv = rproc_create_trace_file(name, rproc, trace);
- if (!trace->priv) {
- trace->va = NULL;
+ trace->tfile = rproc_create_trace_file(name, rproc, trace);
+ if (!trace->tfile) {
kfree(trace);
return -EINVAL;
}
@@ -654,8 +648,8 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
rproc->num_traces++;
- dev_dbg(dev, "%s added: va %pK, da 0x%x, len 0x%x\n",
- name, ptr, rsc->da, rsc->len);
+ dev_dbg(dev, "%s added: da 0x%x, len 0x%x\n",
+ name, rsc->da, rsc->len);
return 0;
}
@@ -1249,15 +1243,16 @@ static void rproc_coredump_cleanup(struct rproc *rproc)
static void rproc_resource_cleanup(struct rproc *rproc)
{
struct rproc_mem_entry *entry, *tmp;
+ struct rproc_debug_trace *trace, *ttmp;
struct rproc_vdev *rvdev, *rvtmp;
struct device *dev = &rproc->dev;
/* clean up debugfs trace entries */
- list_for_each_entry_safe(entry, tmp, &rproc->traces, node) {
- rproc_remove_trace_file(entry->priv);
+ list_for_each_entry_safe(trace, ttmp, &rproc->traces, node) {
+ rproc_remove_trace_file(trace->tfile);
rproc->num_traces--;
- list_del(&entry->node);
- kfree(entry);
+ list_del(&trace->node);
+ kfree(trace);
}
/* clean up iommu mapping entries */
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index f330a9ad014f..6da934b8dc4b 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -47,10 +47,23 @@ static struct dentry *rproc_dbg;
static ssize_t rproc_trace_read(struct file *filp, char __user *userbuf,
size_t count, loff_t *ppos)
{
- struct rproc_mem_entry *trace = filp->private_data;
- int len = strnlen(trace->va, trace->len);
+ struct rproc_debug_trace *data = filp->private_data;
+ struct rproc_mem_entry *trace = &data->trace_mem;
+ void *va;
+ char buf[100];
+ int len;
+
+ va = rproc_da_to_va(data->rproc, trace->da, trace->len);
+
+ if (!va) {
+ len = scnprintf(buf, sizeof(buf), "Trace %s not available\n",
+ trace->name);
+ va = buf;
+ } else {
+ len = strnlen(va, trace->len);
+ }
- return simple_read_from_buffer(userbuf, count, ppos, trace->va, len);
+ return simple_read_from_buffer(userbuf, count, ppos, va, len);
}
static const struct file_operations trace_rproc_ops = {
@@ -312,7 +325,7 @@ void rproc_remove_trace_file(struct dentry *tfile)
}
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
- struct rproc_mem_entry *trace)
+ struct rproc_debug_trace *trace)
{
struct dentry *tfile;
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 2698775c5005..45ff76a06c72 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -25,6 +25,13 @@
struct rproc;
+struct rproc_debug_trace {
+ struct rproc *rproc;
+ struct dentry *tfile;
+ struct list_head node;
+ struct rproc_mem_entry trace_mem;
+};
+
/* from remoteproc_core.c */
void rproc_release(struct kref *kref);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
@@ -37,7 +44,7 @@ int rproc_remove_virtio_dev(struct device *dev, void *data);
/* from remoteproc_debugfs.c */
void rproc_remove_trace_file(struct dentry *tfile);
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
- struct rproc_mem_entry *trace);
+ struct rproc_debug_trace *trace);
void rproc_delete_debug_dir(struct rproc *rproc);
void rproc_create_debug_dir(struct rproc *rproc);
void rproc_init_debugfs(void);