1 files changed, 115 insertions, 0 deletions
diff --git a/mali_kbase/mali_kbase_debug_mem_zones.c b/mali_kbase/mali_kbase_debug_mem_zones.c
new file mode 100644
index 0000000..115c9c3
--- /dev/null
+++ b/mali_kbase/mali_kbase_debug_mem_zones.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+/*
+ *
+ * (C) COPYRIGHT 2022-2023 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU license.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you can access it online at
+ * http://www.gnu.org/licenses/gpl-2.0.html.
+ *
+ */
+
+/*
+ * Debugfs interface to dump information about GPU_VA memory zones
+ */
+
+#include "mali_kbase_debug_mem_zones.h"
+#include "mali_kbase.h"
+
+#include <linux/list.h>
+#include <linux/file.h>
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+
+/**
+ * debug_mem_zones_show - Show information about GPU_VA memory zones
+ * @sfile: The debugfs entry
+ * @data: Data associated with the entry
+ *
+ * This function is called to get the contents of the @c mem_zones debugfs file.
+ * This lists the start address and size (in pages) of each initialized memory
+ * zone within GPU_VA memory.
+ *
+ * Return:
+ * 0 if successfully prints data in debugfs entry file
+ * -1 if it encountered an error
+ */
+static int debug_mem_zones_show(struct seq_file *sfile, void *data)
+{
+	struct kbase_context *const kctx = sfile->private;
+	struct kbase_reg_zone *reg_zone;
+	enum kbase_memory_zone zone_idx;
+
+	kbase_gpu_vm_lock(kctx);
+
+	for (zone_idx = 0; zone_idx < CONTEXT_ZONE_MAX; zone_idx++) {
+		reg_zone = &kctx->reg_zone[zone_idx];
+
+		if (reg_zone->base_pfn) {
+			seq_printf(sfile, "%15s %u 0x%.16llx 0x%.16llx\n",
+				   kbase_reg_zone_get_name(zone_idx), zone_idx, reg_zone->base_pfn,
+				   reg_zone->va_size_pages);
+		}
+	}
+#if MALI_USE_CSF
+	reg_zone = &kctx->kbdev->csf.mcu_shared_zone;
+
+	if (reg_zone && reg_zone->base_pfn) {
+		seq_printf(sfile, "%15s %u 0x%.16llx 0x%.16llx\n",
+			   kbase_reg_zone_get_name(MCU_SHARED_ZONE), MCU_SHARED_ZONE,
+			   reg_zone->base_pfn, reg_zone->va_size_pages);
+	}
+#endif
+
+	kbase_gpu_vm_unlock(kctx);
+	return 0;
+}
+
+/*
+ *  File operations related to debugfs entry for mem_zones
+ */
+static int debug_mem_zones_open(struct inode *in, struct file *file)
+{
+	return single_open(file, debug_mem_zones_show, in->i_private);
+}
+
+static const struct file_operations kbase_debug_mem_zones_fops = {
+	.owner = THIS_MODULE,
+	.open = debug_mem_zones_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+/*
+ *  Initialize debugfs entry for mem_zones
+ */
+void kbase_debug_mem_zones_init(struct kbase_context *const kctx)
+{
+	/* Caller already ensures this, but we keep the pattern for
+	 * maintenance safety.
+	 */
+	if (WARN_ON(!kctx) || WARN_ON(IS_ERR_OR_NULL(kctx->kctx_dentry)))
+		return;
+
+	debugfs_create_file("mem_zones", 0400, kctx->kctx_dentry, kctx,
+			    &kbase_debug_mem_zones_fops);
+}
+#else
+/*
+ * Stub functions for when debugfs is disabled
+ */
+void kbase_debug_mem_zones_init(struct kbase_context *const kctx)
+{
+}
+#endif