[PATCH i-g-t v2 1/2] lib/intel_common: Add placeholder for common i915 and xe functions

[Zbigniew Kempczyński]

Some constructs like querying if device is discrete or getting memory
region origin are common so add new file to place those functions into.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>

---
v2: Add gen12 (integrated + dg1) support in querying is region
    compressible (Matt)
    Small code restructure.
---
 lib/intel_common.c | 102 +++++++++++++++++++++++++++++++++++++++++++++
 lib/intel_common.h |  25 +++++++++++
 lib/meson.build    |   1 +
 3 files changed, 128 insertions(+)
 create mode 100644 lib/intel_common.c
 create mode 100644 lib/intel_common.h

diff --git a/lib/intel_common.c b/lib/intel_common.c
new file mode 100644
index 0000000000..4cee70c53a
--- /dev/null
+++ b/lib/intel_common.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#include "drmtest.h"
+#include "intel_chipset.h"
+#include "intel_common.h"
+#include "i915/intel_memory_region.h"
+#include "xe/xe_query.h"
+
+/**
+ * is_intel_dgfx:
+ * @fd: drm fd
+ *
+ * Check if Intel device opened at @fd is discrete regardless driver (i915/xe).
+ *
+ * Returns: True if device is Intel discrete, false otherwise
+ */
+bool is_intel_dgfx(int fd)
+{
+	return get_intel_driver(fd) == INTEL_DRIVER_XE ? xe_has_vram(fd) :
+							 gem_has_lmem(fd);
+}
+
+/**
+ * is_intel_system_region:
+ * @fd: drm fd
+ * @region: region id
+ *
+ * Check if @region is system region on @fd opened Intel device.
+ *
+ * Returns: True if @region is system memory, false otherwise
+ */
+bool is_intel_system_region(int fd, uint64_t region)
+{
+	enum intel_driver driver = get_intel_driver(fd);
+	bool is_system;
+
+	if (driver == INTEL_DRIVER_I915) {
+		is_system = IS_SYSTEM_MEMORY_REGION(region);
+	} else {
+		igt_assert_neq(region, 0);
+		is_system = (region == system_memory(fd));
+	}
+
+	return is_system;
+}
+
+/**
+ * is_intel_vram_region:
+ * @fd: drm fd
+ * @region: region id
+ *
+ * Check if @region is vram (device memory) region on @fd opened Intel device.
+ *
+ * Returns: True if @region is vram, false otherwise
+ */
+bool is_intel_vram_region(int fd, uint64_t region)
+{
+	enum intel_driver driver = get_intel_driver(fd);
+	bool is_vram;
+
+	if (driver == INTEL_DRIVER_I915) {
+		is_vram = IS_DEVICE_MEMORY_REGION(region);
+	} else {
+		igt_assert_neq(region, 0);
+		is_vram = (region & (all_memory_regions(fd) & (~system_memory(fd))));
+	}
+
+	return is_vram;
+}
+
+/**
+ * is_intel_region_compressible:
+ * @fd: drm fd
+ * @region: region id
+ *
+ * Check if @region is compressible on @fd opened Intel device.
+ *
+ * Returns: True if @region is compressible, false otherwise
+ */
+bool is_intel_region_compressible(int fd, uint64_t region)
+{
+	uint32_t devid = intel_get_drm_devid(fd);
+	bool is_dgfx = is_intel_dgfx(fd);
+	bool has_flatccs = HAS_FLATCCS(devid);
+
+	/* Integrated or DG1 with aux-ccs */
+	if (IS_GEN12(devid) && !has_flatccs)
+		return true;
+
+	/* Integrated Xe2+ supports compression on system memory */
+	if (AT_LEAST_GEN(devid, 20) && !is_dgfx && is_intel_system_region(fd, region))
+		return true;
+
+	/* Discrete supports compression on vram */
+	if (is_dgfx && is_intel_vram_region(fd, region))
+		return true;
+
+	return false;
+}
diff --git a/lib/intel_common.h b/lib/intel_common.h
new file mode 100644
index 0000000000..924802473b
--- /dev/null
+++ b/lib/intel_common.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef __INTEL_COMMON_H__
+#define __INTEL_COMMON_H__
+
+/**
+ * SECTION:intel_common
+ * @short_description: i915/xe common library code
+ * @title: Intel library
+ * @include: intel_common.h
+ *
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+bool is_intel_dgfx(int fd);
+bool is_intel_system_region(int fd, uint64_t region);
+bool is_intel_vram_region(int fd, uint64_t region);
+bool is_intel_region_compressible(int fd, uint64_t region);
+
+#endif
diff --git a/lib/meson.build b/lib/meson.build
index 6122861d8b..934bac5c67 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -59,6 +59,7 @@ lib_sources = [
 	'intel_bufops.c',
 	'intel_chipset.c',
 	'intel_cmds_info.c',
+	'intel_common.c',
 	'intel_compute.c',
 	'intel_compute_square_kernels.c',
 	'intel_ctx.c',
-- 
2.34.1