From ce9f2e107654bb95856545da6e89f0fd3b8a0787 Mon Sep 17 00:00:00 2001
From: Yunmi Ha <yunmi.ha@samsung.com>
Date: Thu, 4 Feb 2021 17:16:33 +0900
Subject: [PATCH] memory: add new halapi backend

Change-Id: Ic9a2826e5d0b89b64d7288af61d8f935a4d11d05
Signed-off-by: Yunmi Ha <yunmi.ha@samsung.com>
---
 CMakeLists.txt           |   1 +
 hw/memory/CMakeLists.txt |  18 ++++++++
 hw/memory/memory.c       | 111 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 130 insertions(+)
 create mode 100644 hw/memory/CMakeLists.txt
 create mode 100644 hw/memory/memory.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 50a776a..47708fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,3 +19,4 @@ ADD_SUBDIRECTORY(hw/usb_gadget)
 ADD_SUBDIRECTORY(hw/thermal)
 ADD_SUBDIRECTORY(hw/bezel)
 ADD_SUBDIRECTORY(hw/haptic)
+ADD_SUBDIRECTORY(hw/memory)
diff --git a/hw/memory/CMakeLists.txt b/hw/memory/CMakeLists.txt
new file mode 100644
index 0000000..a35248a
--- /dev/null
+++ b/hw/memory/CMakeLists.txt
@@ -0,0 +1,18 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+PROJECT(hal-backend-device-memory C)
+
+SET(PREFIX ${CMAKE_INSTALL_PREFIX})
+
+INCLUDE(FindPkgConfig)
+pkg_check_modules(hal-backend-device-memory_pkgs REQUIRED dlog)
+
+FOREACH(flag ${hal-backend-device-memory_pkgs_CFLAGS})
+	SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} ${flag}")
+ENDFOREACH(flag)
+
+SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} -fvisibility=hidden")
+SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_CFLAGS}")
+
+ADD_LIBRARY(${PROJECT_NAME} MODULE memory.c)
+TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${hal-backend-device-memory_pkgs_LDFLAGS})
+INSTALL(TARGETS ${PROJECT_NAME} DESTINATION ${HAL_LIB_DIR} COMPONENT RuntimeLibraries)
diff --git a/hw/memory/memory.c b/hw/memory/memory.c
new file mode 100644
index 0000000..bf99967
--- /dev/null
+++ b/hw/memory/memory.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2021 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the License);
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <hal/device/hal-memory-interface.h>
+#include <hal/hal-common-interface.h>
+
+#include </hal/include/device/hal-backend-common.h>
+
+#define GEM_INFO_PATH     "/sys/kernel/debug/dri/0/gem_info"
+#define BYTES_PER_KBYTE   1024
+
+static int memory_get_gpu_info(const int pid, struct gpu_info *info)
+{
+	return -EINVAL;
+}
+
+static int memory_get_gem_info(const int pid, struct gem_info *info)
+{
+	FILE *fp;
+	char line[1024];
+	int p;
+	unsigned int hcount, total_hcount;
+	unsigned long rss, total_rss, temp;
+
+	if (!info)
+		return -EINVAL;
+
+	fp = fopen(GEM_INFO_PATH, "r");
+	if (!fp)  {
+		_E("Failed to open %s, %d", GEM_INFO_PATH, -errno);
+		/* Return the designated error(EIO) instead of general error(errno)
+		 * for api-level error conversion compatibility, as the api(runtime-info)
+		 * has no error enum for general error(errno) */
+		return -EIO;
+	}
+
+	total_hcount = 0;
+	total_rss = 0;
+
+	/* TM1 format:
+	 * pid  tgid  handle  refcount hcount  size        flags  pfnmap  export_to_fd    import_from_fd  obj_addr            name
+	 * 2978 2978  1       2        2       0x0007f000  0x3    0       0               0               0xffffffc024941200  6
+	 */
+	while (fgets(line, 1024, fp)) {
+		if (sscanf(line, "%d %*d %*d %*d %u %lx", &p, &hcount, &rss) != 3)
+			continue;
+
+		if (p != pid)
+			continue;
+
+		total_rss += rss;
+		total_hcount += hcount;
+	}
+
+	temp = total_rss / (unsigned long)BYTES_PER_KBYTE;
+	info->rss = (int)temp;
+
+	temp = (total_rss / (unsigned long)total_hcount) / (unsigned long)BYTES_PER_KBYTE;
+	info->pss = (int)temp;
+
+	fclose(fp);
+
+	return 0;
+}
+
+static int memory_init(void **data)
+{
+	hal_backend_memory_funcs *memory_funcs;
+
+	memory_funcs = calloc(1, sizeof(hal_backend_memory_funcs));
+	if (!memory_funcs)
+		return -ENOMEM;
+
+	memory_funcs->get_gpu_info = memory_get_gpu_info;
+	memory_funcs->get_gem_info = memory_get_gem_info;
+
+	*data = (void *)memory_funcs;
+
+	return 0;
+}
+
+static int memory_exit(void *data)
+{
+	free(data);
+	return 0;
+}
+
+hal_backend EXPORT hal_backend_device_memory_data = {
+	.name = "memory",
+	.vendor = "R800",
+	.abi_version = HAL_ABI_VERSION_TIZEN_6_5,
+	.init = memory_init,
+	.exit = memory_exit,
+};
-- 
2.7.4