msm: camera: common: changes to handle err in bazel build

Currently, the 'mm/slab.h' header is used to access a private kernel
structure. With Bazel, private headers are not available.
Refactor the code to avoid the use of the private header.

CRs-Fixed: 3535645
Change-Id: I3b442f0a7b2b70fbf638d3f505c47de88b14c5e6
Signed-off-by: Soumen Ghosh <[email protected]>

BUILD.bazel

@@ -130,6 +130,24 @@ ddk_headers(
     ],
 )
 
+genrule(
+    name = "camera_banner_header",
+    srcs = [],
+    outs = ["cam_generated.h"],
+    cmd = """
+      {
+        printf '#define CAMERA_COMPILE_TIME "%s"\n' "$$(date)"
+        printf '#define CAMERA_COMPILE_BY "%s"\n' "$$(whoami)"
+        printf '#define CAMERA_COMPILE_HOST "%s"\n' "$$(uname -n)"
+      } > "$@"
+    """
+)
+
+ddk_headers(
+    name = "camera_banner",
+    hdrs = [":camera_banner_header"],
+)
+
 load(":camera_modules.bzl", "define_camera_module")
 
 define_camera_module()

camera_modules.bzl

@@ -5,13 +5,14 @@ def _define_module(target, variant):
     tv = "{}_{}".format(target, variant)
     deps = [
         ":camera_headers",
+        ":camera_banner",
         "//msm-kernel:all_headers",
     ]
     if target == "pineapple":
         deps.extend([
             "//vendor/qcom/opensource/synx-kernel:synx_headers",
             "//vendor/qcom/opensource/synx-kernel:{}_modules".format(tv),
-            "//vendor/qcom/opensource/securemsm-kernel:securemsm_kernel_headers",
+            "//vendor/qcom/opensource/securemsm-kernel:qseecom_kernel_headers",
             "//vendor/qcom/opensource/securemsm-kernel:smmu_proxy_headers",
             "//vendor/qcom/opensource/securemsm-kernel:{}_smcinvoke_dlkm".format(tv),
             "//vendor/qcom/opensource/securemsm-kernel:{}_smmu_proxy_dlkm".format(tv),
@@ -215,6 +216,7 @@ def _define_module(target, variant):
                 ],
             },
         },
+        copts = ["-include", "$(location :camera_banner)"],
         deps = deps,
         kconfig = "Kconfig",
         defconfig = "{}_defconfig".format(tv),

drivers/cam_req_mgr/cam_req_mgr_dev.c

@@ -11,8 +11,6 @@
 #include <linux/types.h>
 #include <linux/rwsem.h>
 
-#include <mm/slab.h>
-
 #include <media/v4l2-fh.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-event.h>
@@ -1004,14 +1002,12 @@ static int cam_req_mgr_component_master_bind(struct device *dev)
 	INIT_LIST_HEAD(&cam_req_mgr_ordered_sd_list);
 
 	if (g_cam_req_mgr_timer_cachep == NULL) {
-		g_cam_req_mgr_timer_cachep = kmem_cache_create("crm_timer",
-			sizeof(struct cam_req_mgr_timer), 64, 0x0, NULL);
+		g_cam_req_mgr_timer_cachep = KMEM_CACHE(cam_req_mgr_timer, 0x0);
 		if (!g_cam_req_mgr_timer_cachep)
 			CAM_ERR(CAM_CRM,
 				"Failed to create kmem_cache for crm_timer");
 		else
-			CAM_DBG(CAM_CRM, "Name : %s",
-				g_cam_req_mgr_timer_cachep->name);
+			CAM_DBG(CAM_CRM, "Name : cam_req_mgr_timer");
 	}
 
 	CAM_DBG(CAM_CRM, "All probes done, binding slave components");

drivers/camera_main.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2019-2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 #include <linux/module.h>
 #include <linux/build_bug.h>
@@ -61,7 +61,9 @@
 #include "cam_csid_ppi100.h"
 #include "camera_main.h"
 
+#ifndef CAMERA_COMPILE_BY
 #include "cam_generated_h"
+#endif
 
 char camera_banner[] = "Camera-Banner: (" CAMERA_COMPILE_BY "@"
 	CAMERA_COMPILE_HOST ") (" CAMERA_COMPILE_TIME ")";