1 files changed, 167 insertions, 0 deletions

diff --git a/drivers/video/tegra/host/debug.c b/drivers/video/tegra/host/debug.c
new file mode 100644
index 00000000000..91436c903fc
--- /dev/null
+++ b/drivers/video/tegra/host/debug.c
@@ -0,0 +1,167 @@
+/*
+ * drivers/video/tegra/host/debug.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Erik Gilling <konkers@android.com>
+ *
+ * Copyright (C) 2011 NVIDIA Corporation
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include <linux/io.h>
+
+#include "dev.h"
+#include "debug.h"
+
+pid_t nvhost_debug_null_kickoff_pid;
+unsigned int nvhost_debug_trace_cmdbuf;
+
+pid_t nvhost_debug_force_timeout_pid;
+u32 nvhost_debug_force_timeout_val;
+u32 nvhost_debug_force_timeout_channel;
+
+void nvhost_debug_output(struct output *o, const char* fmt, ...)
+{
+        va_list args;
+        int len;
+
+        va_start(args, fmt);
+        len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
+        va_end(args);
+        o->fn(o->ctx, o->buf, len);
+}
+
+static int show_channels(struct device *dev, void *data)
+{
+        struct nvhost_channel *ch;
+        struct nvhost_device *nvdev = to_nvhost_device(dev);
+        struct output *o = data;
+        struct nvhost_master *m;
+
+        if (nvdev == NULL)
+                return 0;
+
+        m = nvhost_get_host(nvdev);
+        ch = nvdev->channel;
+        if (ch) {
+                mutex_lock(&ch->reflock);
+                if (ch->refcount) {
+                        mutex_lock(&ch->cdma.lock);
+                        m->op.debug.show_channel_fifo(m, ch, o, nvdev->index);
+                        m->op.debug.show_channel_cdma(m, ch, o, nvdev->index);
+                        mutex_unlock(&ch->cdma.lock);
+                }
+                mutex_unlock(&ch->reflock);
+        }
+
+        return 0;
+}
+
+static void show_syncpts(struct nvhost_master *m, struct output *o)
+{
+        int i;
+        BUG_ON(!m->op.syncpt.name);
+        nvhost_debug_output(o, "---- syncpts ----\n");
+        for (i = 0; i < m->syncpt.nb_pts; i++) {
+                u32 max = nvhost_syncpt_read_max(&m->syncpt, i);
+                u32 min = nvhost_syncpt_update_min(&m->syncpt, i);
+                if (!min && !max)
+                        continue;
+                nvhost_debug_output(o, "id %d (%s) min %d max %d\n",
+                                i, m->op.syncpt.name(&m->syncpt, i),
+                                min, max);
+        }
+
+        for (i = 0; i < m->syncpt.nb_bases; i++) {
+                u32 base_val;
+                base_val = nvhost_syncpt_read_wait_base(&m->syncpt, i);
+                if (base_val)
+                        nvhost_debug_output(o, "waitbase id %d val %d\n",
+                                        i, base_val);
+        }
+
+        nvhost_debug_output(o, "\n");
+}
+
+static void show_all(struct nvhost_master *m, struct output *o)
+{
+        nvhost_module_busy(m->dev);
+
+        m->op.debug.show_mlocks(m, o);
+        show_syncpts(m, o);
+        nvhost_debug_output(o, "---- channels ----\n");
+        bus_for_each_dev(&nvhost_bus_type, NULL, o, show_channels);
+
+        nvhost_module_idle(m->dev);
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int nvhost_debug_show(struct seq_file *s, void *unused)
+{
+        struct output o = {
+                .fn = write_to_seqfile,
+                .ctx = s
+        };
+        show_all(s->private, &o);
+        return 0;
+}
+
+static int nvhost_debug_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, nvhost_debug_show, inode->i_private);
+}
+
+static const struct file_operations nvhost_debug_fops = {
+        .open           = nvhost_debug_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+void nvhost_debug_init(struct nvhost_master *master)
+{
+        struct dentry *de = debugfs_create_dir("tegra_host", NULL);
+
+        debugfs_create_file("status", S_IRUGO, de,
+                        master, &nvhost_debug_fops);
+
+        debugfs_create_u32("null_kickoff_pid", S_IRUGO|S_IWUSR, de,
+                        &nvhost_debug_null_kickoff_pid);
+        debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
+                        &nvhost_debug_trace_cmdbuf);
+
+        if (master->op.debug.debug_init)
+                master->op.debug.debug_init(de);
+
+        debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
+                        &nvhost_debug_force_timeout_pid);
+        debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
+                        &nvhost_debug_force_timeout_val);
+        debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
+                        &nvhost_debug_force_timeout_channel);
+}
+#else
+void nvhost_debug_init(struct nvhost_master *master)
+{
+}
+#endif
+
+void nvhost_debug_dump(struct nvhost_master *master)
+{
+        struct output o = {
+                .fn = write_to_printk
+        };
+        show_all(master, &o);
+}