git: b68fe1ef731f - main - linuxkpi: Add <linux/acpi_amd_wbrf.h>

The branch main has been updated by dumbbell:

URL: https://cgit.FreeBSD.org/src/commit/?id=b68fe1ef731f7d536ea98e6e9c44fb3c76857c1d

commit b68fe1ef731f7d536ea98e6e9c44fb3c76857c1d
Author:     Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
AuthorDate: 2025-02-28 22:45:29 +0000
Commit:     Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
CommitDate: 2025-04-07 17:43:06 +0000

    linuxkpi: Add <linux/acpi_amd_wbrf.h>
    
    This header implements several stub functions that, on Linux, are used
    when `CONFIG_AMD_WBRF` is not set at build time.
    
    The amdgpu DRM driver started to use it in Linux 6.8.
    
    Reviewed by:    bz
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D49382
---
 .../linuxkpi/common/include/linux/acpi_amd_wbrf.h  | 97 ++++++++++++++++++++++
 1 file changed, 97 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/acpi_amd_wbrf.h b/sys/compat/linuxkpi/common/include/linux/acpi_amd_wbrf.h
new file mode 100644
index 000000000000..92c2ead41c45
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/acpi_amd_wbrf.h
@@ -0,0 +1,97 @@
+/*-
+ * Copyright (c) 2025 The FreeBSD Foundation
+ * Copyright (c) 2025 Jean-Sébastien Pédron
+ *
+ * This software was developed by Jean-Sébastien Pédron under sponsorship
+ * from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef	_LINUXKPI_LINUX_ACPI_AMD_WBRF_H_
+#define	_LINUXKPI_LINUX_ACPI_AMD_WBRF_H_
+
+#include <linux/device.h>
+#include <linux/notifier.h>
+
+#define	MAX_NUM_OF_WBRF_RANGES		11
+
+#define	WBRF_RECORD_ADD		0x0
+#define	WBRF_RECORD_REMOVE	0x1
+
+struct freq_band_range {
+	uint64_t	start;
+	uint64_t	end;
+};
+
+struct wbrf_ranges_in_out {
+	uint64_t		num_of_ranges;
+	struct freq_band_range	band_list[MAX_NUM_OF_WBRF_RANGES];
+};
+
+enum wbrf_notifier_actions {
+	WBRF_CHANGED,
+};
+
+/*
+ * The following functions currently have dummy implementations that, on Linux,
+ * are used when CONFIG_AMD_WBRF is not set at compile time.
+ */
+
+static inline bool
+acpi_amd_wbrf_supported_consumer(struct device *dev)
+{
+	return (false);
+}
+
+static inline int
+acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action,
+    struct wbrf_ranges_in_out *in)
+{
+	return (-ENODEV);
+}
+
+static inline bool
+acpi_amd_wbrf_supported_producer(struct device *dev)
+{
+	return (false);
+}
+
+static inline int
+amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out)
+{
+	return (-ENODEV);
+}
+
+static inline int
+amd_wbrf_register_notifier(struct notifier_block *nb)
+{
+	return (-ENODEV);
+}
+
+static inline int
+amd_wbrf_unregister_notifier(struct notifier_block *nb)
+{
+	return (-ENODEV);
+}
+
+#endif /* _LINUXKPI_LINUX_ACPI_AMD_WBRF_H_ */