1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c
new file mode 100644
index 000000000..ddfbe3346
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/fs.h>
+#include <drm/drm_print.h>
+
+#include "gt/intel_gt_debugfs.h"
+#include "intel_guc.h"
+#include "intel_guc_log.h"
+#include "intel_guc_log_debugfs.h"
+#include "intel_uc.h"
+
+static u32 obj_to_guc_log_dump_size(struct drm_i915_gem_object *obj)
+{
+	u32 size;
+
+	if (!obj)
+		return PAGE_SIZE;
+
+	/* "0x%08x 0x%08x 0x%08x 0x%08x\n" => 16 bytes -> 44 chars => x2.75 */
+	size = ((obj->base.size * 11) + 3) / 4;
+
+	/* Add padding for final blank line, any extra header info, etc. */
+	size = PAGE_ALIGN(size + PAGE_SIZE);
+
+	return size;
+}
+
+static u32 guc_log_dump_size(struct intel_guc_log *log)
+{
+	struct intel_guc *guc = log_to_guc(log);
+
+	if (!intel_guc_is_supported(guc))
+		return PAGE_SIZE;
+
+	if (!log->vma)
+		return PAGE_SIZE;
+
+	return obj_to_guc_log_dump_size(log->vma->obj);
+}
+
+static int guc_log_dump_show(struct seq_file *m, void *data)
+{
+	struct drm_printer p = drm_seq_file_printer(m);
+	int ret;
+
+	ret = intel_guc_log_dump(m->private, &p, false);
+
+	if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) && seq_has_overflowed(m))
+		pr_warn_once("preallocated size:%zx for %s exceeded\n",
+			     m->size, __func__);
+
+	return ret;
+}
+DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE_WITH_SIZE(guc_log_dump, guc_log_dump_size);
+
+static u32 guc_load_err_dump_size(struct intel_guc_log *log)
+{
+	struct intel_guc *guc = log_to_guc(log);
+	struct intel_uc *uc = container_of(guc, struct intel_uc, guc);
+
+	if (!intel_guc_is_supported(guc))
+		return PAGE_SIZE;
+
+	return obj_to_guc_log_dump_size(uc->load_err_log);
+}
+
+static int guc_load_err_log_dump_show(struct seq_file *m, void *data)
+{
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) && seq_has_overflowed(m))
+		pr_warn_once("preallocated size:%zx for %s exceeded\n",
+			     m->size, __func__);
+
+	return intel_guc_log_dump(m->private, &p, true);
+}
+DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE_WITH_SIZE(guc_load_err_log_dump, guc_load_err_dump_size);
+
+static int guc_log_level_get(void *data, u64 *val)
+{
+	struct intel_guc_log *log = data;
+
+	if (!log->vma)
+		return -ENODEV;
+
+	*val = intel_guc_log_get_level(log);
+
+	return 0;
+}
+
+static int guc_log_level_set(void *data, u64 val)
+{
+	struct intel_guc_log *log = data;
+
+	if (!log->vma)
+		return -ENODEV;
+
+	return intel_guc_log_set_level(log, val);
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(guc_log_level_fops,
+			guc_log_level_get, guc_log_level_set,
+			"%lld\n");
+
+static int guc_log_relay_open(struct inode *inode, struct file *file)
+{
+	struct intel_guc_log *log = inode->i_private;
+
+	if (!intel_guc_is_ready(log_to_guc(log)))
+		return -ENODEV;
+
+	file->private_data = log;
+
+	return intel_guc_log_relay_open(log);
+}
+
+static ssize_t
+guc_log_relay_write(struct file *filp,
+		    const char __user *ubuf,
+		    size_t cnt,
+		    loff_t *ppos)
+{
+	struct intel_guc_log *log = filp->private_data;
+	int val;
+	int ret;
+
+	ret = kstrtoint_from_user(ubuf, cnt, 0, &val);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Enable and start the guc log relay on value of 1.
+	 * Flush log relay for any other value.
+	 */
+	if (val == 1)
+		ret = intel_guc_log_relay_start(log);
+	else
+		intel_guc_log_relay_flush(log);
+
+	return ret ?: cnt;
+}
+
+static int guc_log_relay_release(struct inode *inode, struct file *file)
+{
+	struct intel_guc_log *log = inode->i_private;
+
+	intel_guc_log_relay_close(log);
+	return 0;
+}
+
+static const struct file_operations guc_log_relay_fops = {
+	.owner = THIS_MODULE,
+	.open = guc_log_relay_open,
+	.write = guc_log_relay_write,
+	.release = guc_log_relay_release,
+};
+
+void intel_guc_log_debugfs_register(struct intel_guc_log *log,
+				    struct dentry *root)
+{
+	static const struct intel_gt_debugfs_file files[] = {
+		{ "guc_log_dump", &guc_log_dump_fops, NULL },
+		{ "guc_load_err_log_dump", &guc_load_err_log_dump_fops, NULL },
+		{ "guc_log_level", &guc_log_level_fops, NULL },
+		{ "guc_log_relay", &guc_log_relay_fops, NULL },
+	};
+
+	if (!intel_guc_is_supported(log_to_guc(log)))
+		return;
+
+	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), log);
+}