intel/perf: Move code that will be shared by both KMDs

More code will be shared in the next patches.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29421>

src/intel/perf/intel_perf.c

@@ -43,6 +43,7 @@
 
 #include "perf/i915/intel_perf.h"
 #include "perf/intel_perf.h"
+#include "perf/intel_perf_common.h"
 #include "perf/intel_perf_regs.h"
 #include "perf/intel_perf_mdapi.h"
 #include "perf/intel_perf_metrics.h"
@@ -135,27 +136,6 @@ get_sysfs_dev_dir(struct intel_perf_config *perf, int fd)
    return false;
 }
 
-static bool
-read_file_uint64(const char *file, uint64_t *val)
-{
-    char buf[32];
-    int fd, n;
-
-    fd = open(file, 0);
-    if (fd < 0)
-       return false;
-    while ((n = read(fd, buf, sizeof (buf) - 1)) < 0 &&
-           errno == EINTR);
-    close(fd);
-    if (n < 0)
-       return false;
-
-    buf[n] = '\0';
-    *val = strtoull(buf, NULL, 0);
-
-    return true;
-}
-
 static bool
 read_sysfs_drm_device_file_uint64(struct intel_perf_config *perf,
                                   const char *file,

src/intel/perf/intel_perf_common.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2024 Intel Corporation
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "intel_perf_common.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+bool
+read_file_uint64(const char *file, uint64_t *val)
+{
+    char buf[32];
+    int fd, n;
+
+    fd = open(file, 0);
+    if (fd < 0)
+       return false;
+    while ((n = read(fd, buf, sizeof (buf) - 1)) < 0 &&
+           errno == EINTR);
+    close(fd);
+    if (n < 0)
+       return false;
+
+    buf[n] = '\0';
+    *val = strtoull(buf, NULL, 0);
+
+    return true;
+}

src/intel/perf/intel_perf_common.h

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2024 Intel Corporation
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+bool read_file_uint64(const char *file, uint64_t *val);

src/intel/perf/meson.build

@@ -19,6 +19,8 @@ endforeach
 intel_perf_sources = [
   'i915/intel_perf.c',
   'i915/intel_perf.h',
+  'intel_perf_common.c',
+  'intel_perf_common.h',
   'intel_perf.c',
   'intel_perf_query.c',
   'intel_perf_mdapi.c',