From 55c1e286adb11984a50d21d1d44c2e4b6521172e Mon Sep 17 00:00:00 2001
From: Adrian Ratiu <adrian.ratiu@collabora.com>
Date: Mon, 8 Nov 2021 19:58:31 +0200
Subject: [PATCH] BACKPORT: drm: add panfrost_drm.h

Backport the latest panfrost uapi defs required for minigbm
in order to use ioctls like DRM_IOCTL_PANFROST_CREATE_BO
which are present in mainline instead of the downstream
DRM_IOCTL_MTK_GEM_CREATE which got NAK'ed upstream [1].

This was copied from mainline tag v5.15
commit 8bb7eca972ad ("Linux 5.15")

[1] https://yhbt.net/lore/all/CAKMK7uGHWT0TTc2Y5fmCALn2fzQPrTMGymJK4etYjXMcPGE61Q@mail.gmail.com/

Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
---
 include/uapi/drm/panfrost_drm.h | 231 ++++++++++++++++++++++++++++++++
 1 file changed, 231 insertions(+)
 create mode 100644 include/uapi/drm/panfrost_drm.h

diff --git a/include/uapi/drm/panfrost_drm.h b/include/uapi/drm/panfrost_drm.h
new file mode 100644
index 000000000000..061e700dd06c
--- /dev/null
+++ b/include/uapi/drm/panfrost_drm.h
@@ -0,0 +1,231 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2014-2018 Broadcom
+ * Copyright © 2019 Collabora ltd.
+ */
+#ifndef _PANFROST_DRM_H_
+#define _PANFROST_DRM_H_
+
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#define DRM_PANFROST_SUBMIT			0x00
+#define DRM_PANFROST_WAIT_BO			0x01
+#define DRM_PANFROST_CREATE_BO			0x02
+#define DRM_PANFROST_MMAP_BO			0x03
+#define DRM_PANFROST_GET_PARAM			0x04
+#define DRM_PANFROST_GET_BO_OFFSET		0x05
+#define DRM_PANFROST_PERFCNT_ENABLE		0x06
+#define DRM_PANFROST_PERFCNT_DUMP		0x07
+#define DRM_PANFROST_MADVISE			0x08
+
+#define DRM_IOCTL_PANFROST_SUBMIT		DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_SUBMIT, struct drm_panfrost_submit)
+#define DRM_IOCTL_PANFROST_WAIT_BO		DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_WAIT_BO, struct drm_panfrost_wait_bo)
+#define DRM_IOCTL_PANFROST_CREATE_BO		DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_CREATE_BO, struct drm_panfrost_create_bo)
+#define DRM_IOCTL_PANFROST_MMAP_BO		DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_MMAP_BO, struct drm_panfrost_mmap_bo)
+#define DRM_IOCTL_PANFROST_GET_PARAM		DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_PARAM, struct drm_panfrost_get_param)
+#define DRM_IOCTL_PANFROST_GET_BO_OFFSET	DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_BO_OFFSET, struct drm_panfrost_get_bo_offset)
+#define DRM_IOCTL_PANFROST_MADVISE		DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_MADVISE, struct drm_panfrost_madvise)
+
+/*
+ * Unstable ioctl(s): only exposed when the unsafe unstable_ioctls module
+ * param is set to true.
+ * All these ioctl(s) are subject to deprecation, so please don't rely on
+ * them for anything but debugging purpose.
+ */
+#define DRM_IOCTL_PANFROST_PERFCNT_ENABLE	DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_PERFCNT_ENABLE, struct drm_panfrost_perfcnt_enable)
+#define DRM_IOCTL_PANFROST_PERFCNT_DUMP		DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_PERFCNT_DUMP, struct drm_panfrost_perfcnt_dump)
+
+#define PANFROST_JD_REQ_FS (1 << 0)
+/**
+ * struct drm_panfrost_submit - ioctl argument for submitting commands to the 3D
+ * engine.
+ *
+ * This asks the kernel to have the GPU execute a render command list.
+ */
+struct drm_panfrost_submit {
+
+	/** Address to GPU mapping of job descriptor */
+	__u64 jc;
+
+	/** An optional array of sync objects to wait on before starting this job. */
+	__u64 in_syncs;
+
+	/** Number of sync objects to wait on before starting this job. */
+	__u32 in_sync_count;
+
+	/** An optional sync object to place the completion fence in. */
+	__u32 out_sync;
+
+	/** Pointer to a u32 array of the BOs that are referenced by the job. */
+	__u64 bo_handles;
+
+	/** Number of BO handles passed in (size is that times 4). */
+	__u32 bo_handle_count;
+
+	/** A combination of PANFROST_JD_REQ_* */
+	__u32 requirements;
+};
+
+/**
+ * struct drm_panfrost_wait_bo - ioctl argument for waiting for
+ * completion of the last DRM_PANFROST_SUBMIT on a BO.
+ *
+ * This is useful for cases where multiple processes might be
+ * rendering to a BO and you want to wait for all rendering to be
+ * completed.
+ */
+struct drm_panfrost_wait_bo {
+	__u32 handle;
+	__u32 pad;
+	__s64 timeout_ns;	/* absolute */
+};
+
+#define PANFROST_BO_NOEXEC	1
+#define PANFROST_BO_HEAP	2
+
+/**
+ * struct drm_panfrost_create_bo - ioctl argument for creating Panfrost BOs.
+ *
+ * There are currently no values for the flags argument, but it may be
+ * used in a future extension.
+ */
+struct drm_panfrost_create_bo {
+	__u32 size;
+	__u32 flags;
+	/** Returned GEM handle for the BO. */
+	__u32 handle;
+	/* Pad, must be zero-filled. */
+	__u32 pad;
+	/**
+	 * Returned offset for the BO in the GPU address space.  This offset
+	 * is private to the DRM fd and is valid for the lifetime of the GEM
+	 * handle.
+	 *
+	 * This offset value will always be nonzero, since various HW
+	 * units treat 0 specially.
+	 */
+	__u64 offset;
+};
+
+/**
+ * struct drm_panfrost_mmap_bo - ioctl argument for mapping Panfrost BOs.
+ *
+ * This doesn't actually perform an mmap.  Instead, it returns the
+ * offset you need to use in an mmap on the DRM device node.  This
+ * means that tools like valgrind end up knowing about the mapped
+ * memory.
+ *
+ * There are currently no values for the flags argument, but it may be
+ * used in a future extension.
+ */
+struct drm_panfrost_mmap_bo {
+	/** Handle for the object being mapped. */
+	__u32 handle;
+	__u32 flags;
+	/** offset into the drm node to use for subsequent mmap call. */
+	__u64 offset;
+};
+
+enum drm_panfrost_param {
+	DRM_PANFROST_PARAM_GPU_PROD_ID,
+	DRM_PANFROST_PARAM_GPU_REVISION,
+	DRM_PANFROST_PARAM_SHADER_PRESENT,
+	DRM_PANFROST_PARAM_TILER_PRESENT,
+	DRM_PANFROST_PARAM_L2_PRESENT,
+	DRM_PANFROST_PARAM_STACK_PRESENT,
+	DRM_PANFROST_PARAM_AS_PRESENT,
+	DRM_PANFROST_PARAM_JS_PRESENT,
+	DRM_PANFROST_PARAM_L2_FEATURES,
+	DRM_PANFROST_PARAM_CORE_FEATURES,
+	DRM_PANFROST_PARAM_TILER_FEATURES,
+	DRM_PANFROST_PARAM_MEM_FEATURES,
+	DRM_PANFROST_PARAM_MMU_FEATURES,
+	DRM_PANFROST_PARAM_THREAD_FEATURES,
+	DRM_PANFROST_PARAM_MAX_THREADS,
+	DRM_PANFROST_PARAM_THREAD_MAX_WORKGROUP_SZ,
+	DRM_PANFROST_PARAM_THREAD_MAX_BARRIER_SZ,
+	DRM_PANFROST_PARAM_COHERENCY_FEATURES,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES0,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES1,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES2,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES3,
+	DRM_PANFROST_PARAM_JS_FEATURES0,
+	DRM_PANFROST_PARAM_JS_FEATURES1,
+	DRM_PANFROST_PARAM_JS_FEATURES2,
+	DRM_PANFROST_PARAM_JS_FEATURES3,
+	DRM_PANFROST_PARAM_JS_FEATURES4,
+	DRM_PANFROST_PARAM_JS_FEATURES5,
+	DRM_PANFROST_PARAM_JS_FEATURES6,
+	DRM_PANFROST_PARAM_JS_FEATURES7,
+	DRM_PANFROST_PARAM_JS_FEATURES8,
+	DRM_PANFROST_PARAM_JS_FEATURES9,
+	DRM_PANFROST_PARAM_JS_FEATURES10,
+	DRM_PANFROST_PARAM_JS_FEATURES11,
+	DRM_PANFROST_PARAM_JS_FEATURES12,
+	DRM_PANFROST_PARAM_JS_FEATURES13,
+	DRM_PANFROST_PARAM_JS_FEATURES14,
+	DRM_PANFROST_PARAM_JS_FEATURES15,
+	DRM_PANFROST_PARAM_NR_CORE_GROUPS,
+	DRM_PANFROST_PARAM_THREAD_TLS_ALLOC,
+	DRM_PANFROST_PARAM_AFBC_FEATURES,
+};
+
+struct drm_panfrost_get_param {
+	__u32 param;
+	__u32 pad;
+	__u64 value;
+};
+
+/**
+ * Returns the offset for the BO in the GPU address space for this DRM fd.
+ * This is the same value returned by drm_panfrost_create_bo, if that was called
+ * from this DRM fd.
+ */
+struct drm_panfrost_get_bo_offset {
+	__u32 handle;
+	__u32 pad;
+	__u64 offset;
+};
+
+struct drm_panfrost_perfcnt_enable {
+	__u32 enable;
+	/*
+	 * On bifrost we have 2 sets of counters, this parameter defines the
+	 * one to track.
+	 */
+	__u32 counterset;
+};
+
+struct drm_panfrost_perfcnt_dump {
+	__u64 buf_ptr;
+};
+
+/* madvise provides a way to tell the kernel in case a buffers contents
+ * can be discarded under memory pressure, which is useful for userspace
+ * bo cache where we want to optimistically hold on to buffer allocate
+ * and potential mmap, but allow the pages to be discarded under memory
+ * pressure.
+ *
+ * Typical usage would involve madvise(DONTNEED) when buffer enters BO
+ * cache, and madvise(WILLNEED) if trying to recycle buffer from BO cache.
+ * In the WILLNEED case, 'retained' indicates to userspace whether the
+ * backing pages still exist.
+ */
+#define PANFROST_MADV_WILLNEED 0	/* backing pages are needed, status returned in 'retained' */
+#define PANFROST_MADV_DONTNEED 1	/* backing pages not needed */
+
+struct drm_panfrost_madvise {
+	__u32 handle;         /* in, GEM handle */
+	__u32 madv;           /* in, PANFROST_MADV_x */
+	__u32 retained;       /* out, whether backing store still exists */
+};
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* _PANFROST_DRM_H_ */
-- 
2.33.1