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Message-Id: <fed8a77e29620a61aed2684f802339759082cf1b.1700668843.git.donald.robson@imgtec.com>
Date: Wed, 22 Nov 2023 16:34:26 +0000
From: Donald Robson <donald.robson@...tec.com>
To: <dri-devel@...ts.freedesktop.org>
CC: <frank.binns@...tec.com>, <matt.coster@...tec.com>,
<boris.brezillon@...labora.com>, <faith.ekstrand@...labora.com>,
<airlied@...il.com>, <daniel@...ll.ch>,
<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
<tzimmermann@...e.de>, <afd@...com>, <hns@...delico.com>,
<matthew.brost@...el.com>, <christian.koenig@....com>,
<luben.tuikov@....com>, <dakr@...hat.com>,
<linux-kernel@...r.kernel.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
<devicetree@...r.kernel.org>, <corbet@....net>,
<linux-doc@...r.kernel.org>, Sarah Walker <sarah.walker@...tec.com>
Subject: [PATCH v9 05/20] drm/imagination: Add skeleton PowerVR driver
From: Sarah Walker <sarah.walker@...tec.com>
This adds the basic skeleton of the driver. The driver registers
itself with DRM on probe. Ioctl handlers are currently implemented
as stubs.
Changes since v8:
- Corrected license identifiers
Changes since v5:
- Update compatible string & description to match marketing name
- Checkpatch fixes in to/from_pvr_device/file macros
Changes since v3:
- Clarify supported GPU generations in driver description
- Use drm_dev_unplug() when removing device
- Change from_* and to_* functions to macros
- Fix IS_PTR/PTR_ERR confusion in pvr_probe()
- Remove err_out labels in favour of direct returning
- Remove specific am62 compatible match string
- Drop MODULE_FIRMWARE()
Co-developed-by: Frank Binns <frank.binns@...tec.com>
Signed-off-by: Frank Binns <frank.binns@...tec.com>
Co-developed-by: Matt Coster <matt.coster@...tec.com>
Signed-off-by: Matt Coster <matt.coster@...tec.com>
Signed-off-by: Sarah Walker <sarah.walker@...tec.com>
Signed-off-by: Donald Robson <donald.robson@...tec.com>
Reviewed-by: Maxime Ripard <mripard@...nel.org>
---
MAINTAINERS | 1 +
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/imagination/Kconfig | 15 +
drivers/gpu/drm/imagination/Makefile | 9 +
drivers/gpu/drm/imagination/pvr_device.h | 153 +++++++
drivers/gpu/drm/imagination/pvr_drv.c | 509 +++++++++++++++++++++++
drivers/gpu/drm/imagination/pvr_drv.h | 22 +
8 files changed, 712 insertions(+)
create mode 100644 drivers/gpu/drm/imagination/Kconfig
create mode 100644 drivers/gpu/drm/imagination/Makefile
create mode 100644 drivers/gpu/drm/imagination/pvr_device.h
create mode 100644 drivers/gpu/drm/imagination/pvr_drv.c
create mode 100644 drivers/gpu/drm/imagination/pvr_drv.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 37642011c319..debbc1956b8e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10398,6 +10398,7 @@ M: Donald Robson <donald.robson@...tec.com>
M: Matt Coster <matt.coster@...tec.com>
S: Supported
F: Documentation/devicetree/bindings/gpu/img,powervr.yaml
+F: drivers/gpu/drm/imagination/
F: include/uapi/drm/pvr_drm.h
IMON SOUNDGRAPH USB IR RECEIVER
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index cdbc56e07649..740c1c0bd068 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -394,6 +394,8 @@ source "drivers/gpu/drm/solomon/Kconfig"
source "drivers/gpu/drm/sprd/Kconfig"
+source "drivers/gpu/drm/imagination/Kconfig"
+
config DRM_HYPERV
tristate "DRM Support for Hyper-V synthetic video device"
depends on DRM && PCI && MMU && HYPERV
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index cdbe91ac0bfc..b4cb0835620a 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -199,3 +199,4 @@ obj-$(CONFIG_DRM_HYPERV) += hyperv/
obj-y += solomon/
obj-$(CONFIG_DRM_SPRD) += sprd/
obj-$(CONFIG_DRM_LOONGSON) += loongson/
+obj-$(CONFIG_DRM_POWERVR) += imagination/
diff --git a/drivers/gpu/drm/imagination/Kconfig b/drivers/gpu/drm/imagination/Kconfig
new file mode 100644
index 000000000000..03d0a5031f5c
--- /dev/null
+++ b/drivers/gpu/drm/imagination/Kconfig
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0-only OR MIT
+# Copyright (c) 2023 Imagination Technologies Ltd.
+
+config DRM_POWERVR
+ tristate "Imagination Technologies PowerVR (Series 6 and later) & IMG Graphics"
+ depends on ARM64
+ depends on DRM
+ select DRM_GEM_SHMEM_HELPER
+ select DRM_SCHED
+ select FW_LOADER
+ help
+ Choose this option if you have a system that has an Imagination
+ Technologies PowerVR (Series 6 or later) or IMG GPU.
+
+ If "M" is selected, the module will be called powervr.
diff --git a/drivers/gpu/drm/imagination/Makefile b/drivers/gpu/drm/imagination/Makefile
new file mode 100644
index 000000000000..f12a06ada9ec
--- /dev/null
+++ b/drivers/gpu/drm/imagination/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only OR MIT
+# Copyright (c) 2023 Imagination Technologies Ltd.
+
+subdir-ccflags-y := -I$(srctree)/$(src)
+
+powervr-y := \
+ pvr_drv.o \
+
+obj-$(CONFIG_DRM_POWERVR) += powervr.o
diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h
new file mode 100644
index 000000000000..d3629164a629
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_device.h
@@ -0,0 +1,153 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_DEVICE_H
+#define PVR_DEVICE_H
+
+#include <drm/drm_device.h>
+#include <drm/drm_file.h>
+#include <drm/drm_mm.h>
+
+#include <linux/bits.h>
+#include <linux/compiler_attributes.h>
+#include <linux/compiler_types.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+
+/**
+ * struct pvr_device - powervr-specific wrapper for &struct drm_device
+ */
+struct pvr_device {
+ /**
+ * @base: The underlying &struct drm_device.
+ *
+ * Do not access this member directly, instead call
+ * from_pvr_device().
+ */
+ struct drm_device base;
+};
+
+/**
+ * struct pvr_file - powervr-specific data to be assigned to &struct
+ * drm_file.driver_priv
+ */
+struct pvr_file {
+ /**
+ * @file: A reference to the parent &struct drm_file.
+ *
+ * Do not access this member directly, instead call from_pvr_file().
+ */
+ struct drm_file *file;
+
+ /**
+ * @pvr_dev: A reference to the powervr-specific wrapper for the
+ * associated device. Saves on repeated calls to
+ * to_pvr_device().
+ */
+ struct pvr_device *pvr_dev;
+};
+
+#define from_pvr_device(pvr_dev) (&(pvr_dev)->base)
+
+#define to_pvr_device(drm_dev) container_of_const(drm_dev, struct pvr_device, base)
+
+#define from_pvr_file(pvr_file) ((pvr_file)->file)
+
+#define to_pvr_file(file) ((file)->driver_priv)
+
+/**
+ * DOC: IOCTL validation helpers
+ *
+ * To validate the constraints imposed on IOCTL argument structs, a collection
+ * of macros and helper functions exist in ``pvr_device.h``.
+ *
+ * Of the current helpers, it should only be necessary to call
+ * PVR_IOCTL_UNION_PADDING_CHECK() directly. This macro should be used once in
+ * every code path which extracts a union member from a struct passed from
+ * userspace.
+ */
+
+/**
+ * pvr_ioctl_union_padding_check() - Validate that the implicit padding between
+ * the end of a union member and the end of the union itself is zeroed.
+ * @instance: Pointer to the instance of the struct to validate.
+ * @union_offset: Offset into the type of @instance of the target union. Must
+ * be 64-bit aligned.
+ * @union_size: Size of the target union in the type of @instance. Must be
+ * 64-bit aligned.
+ * @member_size: Size of the target member in the target union specified by
+ * @union_offset and @union_size. It is assumed that the offset of the target
+ * member is zero relative to @union_offset. Must be 64-bit aligned.
+ *
+ * You probably want to use PVR_IOCTL_UNION_PADDING_CHECK() instead of calling
+ * this function directly, since that macro abstracts away much of the setup,
+ * and also provides some static validation. See its docs for details.
+ *
+ * Return:
+ * * %true if every byte between the end of the used member of the union and
+ * the end of that union is zeroed, or
+ * * %false otherwise.
+ */
+static __always_inline bool
+pvr_ioctl_union_padding_check(void *instance, size_t union_offset,
+ size_t union_size, size_t member_size)
+{
+ /*
+ * void pointer arithmetic is technically illegal - cast to a byte
+ * pointer so this addition works safely.
+ */
+ void *padding_start = ((u8 *)instance) + union_offset + member_size;
+ size_t padding_size = union_size - member_size;
+
+ return !memchr_inv(padding_start, 0, padding_size);
+}
+
+/**
+ * PVR_STATIC_ASSERT_64BIT_ALIGNED() - Inline assertion for 64-bit alignment.
+ * @static_expr_: Target expression to evaluate.
+ *
+ * If @static_expr_ does not evaluate to a constant integer which would be a
+ * 64-bit aligned address (i.e. a multiple of 8), compilation will fail.
+ *
+ * Return:
+ * The value of @static_expr_.
+ */
+#define PVR_STATIC_ASSERT_64BIT_ALIGNED(static_expr_) \
+ ({ \
+ static_assert(((static_expr_) & (sizeof(u64) - 1)) == 0); \
+ (static_expr_); \
+ })
+
+/**
+ * PVR_IOCTL_UNION_PADDING_CHECK() - Validate that the implicit padding between
+ * the end of a union member and the end of the union itself is zeroed.
+ * @struct_instance_: An expression which evaluates to a pointer to a UAPI data
+ * struct.
+ * @union_: The name of the union member of @struct_instance_ to check. If the
+ * union member is nested within the type of @struct_instance_, this may
+ * contain the member access operator (".").
+ * @member_: The name of the member of @union_ to assess.
+ *
+ * This is a wrapper around pvr_ioctl_union_padding_check() which performs
+ * alignment checks and simplifies things for the caller.
+ *
+ * Return:
+ * * %true if every byte in @struct_instance_ between the end of @member_ and
+ * the end of @union_ is zeroed, or
+ * * %false otherwise.
+ */
+#define PVR_IOCTL_UNION_PADDING_CHECK(struct_instance_, union_, member_) \
+ ({ \
+ typeof(struct_instance_) __instance = (struct_instance_); \
+ size_t __union_offset = PVR_STATIC_ASSERT_64BIT_ALIGNED( \
+ offsetof(typeof(*__instance), union_)); \
+ size_t __union_size = PVR_STATIC_ASSERT_64BIT_ALIGNED( \
+ sizeof(__instance->union_)); \
+ size_t __member_size = PVR_STATIC_ASSERT_64BIT_ALIGNED( \
+ sizeof(__instance->union_.member_)); \
+ pvr_ioctl_union_padding_check(__instance, __union_offset, \
+ __union_size, __member_size); \
+ })
+
+#endif /* PVR_DEVICE_H */
diff --git a/drivers/gpu/drm/imagination/pvr_drv.c b/drivers/gpu/drm/imagination/pvr_drv.c
new file mode 100644
index 000000000000..3d4f2ba2c015
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_drv.c
@@ -0,0 +1,509 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#include "pvr_device.h"
+#include "pvr_drv.h"
+
+#include <uapi/drm/pvr_drm.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_ioctl.h>
+
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+/**
+ * DOC: PowerVR (Series 6 and later) and IMG Graphics Driver
+ *
+ * This driver supports the following PowerVR/IMG graphics cores from Imagination Technologies:
+ *
+ * * AXE-1-16M (found in Texas Instruments AM62)
+ */
+
+/**
+ * pvr_ioctl_create_bo() - IOCTL to create a GEM buffer object.
+ * @drm_dev: [IN] Target DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_create_bo_args.
+ * @file: [IN] DRM file-private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_BO.
+ *
+ * Return:
+ * * 0 on success,
+ * * -%EINVAL if the value of &drm_pvr_ioctl_create_bo_args.size is zero
+ * or wider than &typedef size_t,
+ * * -%EINVAL if any bits in &drm_pvr_ioctl_create_bo_args.flags that are
+ * reserved or undefined are set,
+ * * -%EINVAL if any padding fields in &drm_pvr_ioctl_create_bo_args are not
+ * zero,
+ * * Any error encountered while creating the object (see
+ * pvr_gem_object_create()), or
+ * * Any error encountered while transferring ownership of the object into a
+ * userspace-accessible handle (see pvr_gem_object_into_handle()).
+ */
+static int
+pvr_ioctl_create_bo(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_get_bo_mmap_offset() - IOCTL to generate a "fake" offset to be
+ * used when calling mmap() from userspace to map the given GEM buffer object
+ * @drm_dev: [IN] DRM device (unused).
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_get_bo_mmap_offset_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_GET_BO_MMAP_OFFSET.
+ *
+ * This IOCTL does *not* perform an mmap. See the docs on
+ * &struct drm_pvr_ioctl_get_bo_mmap_offset_args for details.
+ *
+ * Return:
+ * * 0 on success,
+ * * -%ENOENT if the handle does not reference a valid GEM buffer object,
+ * * -%EINVAL if any padding fields in &struct
+ * drm_pvr_ioctl_get_bo_mmap_offset_args are not zero, or
+ * * Any error returned by drm_gem_create_mmap_offset().
+ */
+static int
+pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_dev_query() - IOCTL to copy information about a device
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_dev_query_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DEV_QUERY.
+ * If the given receiving struct pointer is NULL, or the indicated size is too
+ * small, the expected size of the struct type will be returned in the size
+ * argument field.
+ *
+ * Return:
+ * * 0 on success or when fetching the size with args->pointer == NULL, or
+ * * -%E2BIG if the indicated size of the receiving struct is less than is
+ * required to contain the copied data, or
+ * * -%EINVAL if the indicated struct type is unknown, or
+ * * -%ENOMEM if local memory could not be allocated, or
+ * * -%EFAULT if local memory could not be copied to userspace.
+ */
+static int
+pvr_ioctl_dev_query(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_create_context() - IOCTL to create a context
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_create_context_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_CONTEXT.
+ *
+ * Return:
+ * * 0 on success, or
+ * * -%EINVAL if provided arguments are invalid, or
+ * * -%EFAULT if arguments can't be copied from userspace, or
+ * * Any error returned by pvr_create_render_context().
+ */
+static int
+pvr_ioctl_create_context(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_destroy_context() - IOCTL to destroy a context
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_destroy_context_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DESTROY_CONTEXT.
+ *
+ * Return:
+ * * 0 on success, or
+ * * -%EINVAL if context not in context list.
+ */
+static int
+pvr_ioctl_destroy_context(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_create_free_list() - IOCTL to create a free list
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_create_free_list_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_FREE_LIST.
+ *
+ * Return:
+ * * 0 on success, or
+ * * Any error returned by pvr_free_list_create().
+ */
+static int
+pvr_ioctl_create_free_list(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_destroy_free_list() - IOCTL to destroy a free list
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_destroy_free_list_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DESTROY_FREE_LIST.
+ *
+ * Return:
+ * * 0 on success, or
+ * * -%EINVAL if free list not in object list.
+ */
+static int
+pvr_ioctl_destroy_free_list(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_create_hwrt_dataset() - IOCTL to create a HWRT dataset
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_create_hwrt_dataset_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_HWRT_DATASET.
+ *
+ * Return:
+ * * 0 on success, or
+ * * Any error returned by pvr_hwrt_dataset_create().
+ */
+static int
+pvr_ioctl_create_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_destroy_hwrt_dataset() - IOCTL to destroy a HWRT dataset
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_destroy_hwrt_dataset_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_DESTROY_HWRT_DATASET.
+ *
+ * Return:
+ * * 0 on success, or
+ * * -%EINVAL if HWRT dataset not in object list.
+ */
+static int
+pvr_ioctl_destroy_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_create_vm_context() - IOCTL to create a VM context
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_create_vm_context_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_CREATE_VM_CONTEXT.
+ *
+ * Return:
+ * * 0 on success, or
+ * * Any error returned by pvr_vm_create_context().
+ */
+static int
+pvr_ioctl_create_vm_context(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_destroy_vm_context() - IOCTL to destroy a VM context
+* @drm_dev: [IN] DRM device.
+* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+* &struct drm_pvr_ioctl_destroy_vm_context_args.
+* @file: [IN] DRM file private data.
+*
+* Called from userspace with %DRM_IOCTL_PVR_DESTROY_VM_CONTEXT.
+*
+* Return:
+* * 0 on success, or
+* * -%EINVAL if object not in object list.
+ */
+static int
+pvr_ioctl_destroy_vm_context(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_vm_map() - IOCTL to map buffer to GPU address space.
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_vm_map_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_VM_MAP.
+ *
+ * Return:
+ * * 0 on success,
+ * * -%EINVAL if &drm_pvr_ioctl_vm_op_map_args.flags is not zero,
+ * * -%EINVAL if the bounds specified by &drm_pvr_ioctl_vm_op_map_args.offset
+ * and &drm_pvr_ioctl_vm_op_map_args.size are not valid or do not fall
+ * within the buffer object specified by
+ * &drm_pvr_ioctl_vm_op_map_args.handle,
+ * * -%EINVAL if the bounds specified by
+ * &drm_pvr_ioctl_vm_op_map_args.device_addr and
+ * &drm_pvr_ioctl_vm_op_map_args.size do not form a valid device-virtual
+ * address range which falls entirely within a single heap, or
+ * * -%ENOENT if &drm_pvr_ioctl_vm_op_map_args.handle does not refer to a
+ * valid PowerVR buffer object.
+ */
+static int
+pvr_ioctl_vm_map(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/**
+ * pvr_ioctl_vm_unmap() - IOCTL to unmap buffer from GPU address space.
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_vm_unmap_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_VM_UNMAP.
+ *
+ * Return:
+ * * 0 on success,
+ * * -%EINVAL if &drm_pvr_ioctl_vm_op_unmap_args.device_addr is not a valid
+ * device page-aligned device-virtual address, or
+ * * -%ENOENT if there is currently no PowerVR buffer object mapped at
+ * &drm_pvr_ioctl_vm_op_unmap_args.device_addr.
+ */
+static int
+pvr_ioctl_vm_unmap(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+/*
+ * pvr_ioctl_submit_job() - IOCTL to submit a job to the GPU
+ * @drm_dev: [IN] DRM device.
+ * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
+ * &struct drm_pvr_ioctl_submit_job_args.
+ * @file: [IN] DRM file private data.
+ *
+ * Called from userspace with %DRM_IOCTL_PVR_SUBMIT_JOB.
+ *
+ * Return:
+ * * 0 on success, or
+ * * -%EINVAL if arguments are invalid.
+ */
+static int
+pvr_ioctl_submit_jobs(struct drm_device *drm_dev, void *raw_args,
+ struct drm_file *file)
+{
+ return -ENOTTY;
+}
+
+#define DRM_PVR_IOCTL(_name, _func, _flags) \
+ DRM_IOCTL_DEF_DRV(PVR_##_name, pvr_ioctl_##_func, _flags)
+
+/* clang-format off */
+
+static const struct drm_ioctl_desc pvr_drm_driver_ioctls[] = {
+ DRM_PVR_IOCTL(DEV_QUERY, dev_query, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(GET_BO_MMAP_OFFSET, get_bo_mmap_offset, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(CREATE_VM_CONTEXT, create_vm_context, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(DESTROY_VM_CONTEXT, destroy_vm_context, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(VM_MAP, vm_map, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(VM_UNMAP, vm_unmap, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(CREATE_CONTEXT, create_context, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(DESTROY_CONTEXT, destroy_context, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(CREATE_FREE_LIST, create_free_list, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(DESTROY_FREE_LIST, destroy_free_list, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(CREATE_HWRT_DATASET, create_hwrt_dataset, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(DESTROY_HWRT_DATASET, destroy_hwrt_dataset, DRM_RENDER_ALLOW),
+ DRM_PVR_IOCTL(SUBMIT_JOBS, submit_jobs, DRM_RENDER_ALLOW),
+};
+
+/* clang-format on */
+
+#undef DRM_PVR_IOCTL
+
+/**
+ * pvr_drm_driver_open() - Driver callback when a new &struct drm_file is opened
+ * @drm_dev: [IN] DRM device.
+ * @file: [IN] DRM file private data.
+ *
+ * Allocates powervr-specific file private data (&struct pvr_file).
+ *
+ * Registered in &pvr_drm_driver.
+ *
+ * Return:
+ * * 0 on success,
+ * * -%ENOMEM if the allocation of a &struct ipvr_file fails, or
+ * * Any error returned by pvr_memory_context_init().
+ */
+static int
+pvr_drm_driver_open(struct drm_device *drm_dev, struct drm_file *file)
+{
+ struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
+ struct pvr_file *pvr_file;
+
+ pvr_file = kzalloc(sizeof(*pvr_file), GFP_KERNEL);
+ if (!pvr_file)
+ return -ENOMEM;
+
+ /*
+ * Store reference to base DRM file private data for use by
+ * from_pvr_file.
+ */
+ pvr_file->file = file;
+
+ /*
+ * Store reference to powervr-specific outer device struct in file
+ * private data for convenient access.
+ */
+ pvr_file->pvr_dev = pvr_dev;
+
+ /*
+ * Store reference to powervr-specific file private data in DRM file
+ * private data.
+ */
+ file->driver_priv = pvr_file;
+
+ return 0;
+}
+
+/**
+ * pvr_drm_driver_postclose() - One of the driver callbacks when a &struct
+ * drm_file is closed.
+ * @drm_dev: [IN] DRM device (unused).
+ * @file: [IN] DRM file private data.
+ *
+ * Frees powervr-specific file private data (&struct pvr_file).
+ *
+ * Registered in &pvr_drm_driver.
+ */
+static void
+pvr_drm_driver_postclose(__always_unused struct drm_device *drm_dev,
+ struct drm_file *file)
+{
+ struct pvr_file *pvr_file = to_pvr_file(file);
+
+ kfree(pvr_file);
+ file->driver_priv = NULL;
+}
+
+DEFINE_DRM_GEM_FOPS(pvr_drm_driver_fops);
+
+static struct drm_driver pvr_drm_driver = {
+ .driver_features = DRIVER_RENDER,
+ .open = pvr_drm_driver_open,
+ .postclose = pvr_drm_driver_postclose,
+ .ioctls = pvr_drm_driver_ioctls,
+ .num_ioctls = ARRAY_SIZE(pvr_drm_driver_ioctls),
+ .fops = &pvr_drm_driver_fops,
+
+ .name = PVR_DRIVER_NAME,
+ .desc = PVR_DRIVER_DESC,
+ .date = PVR_DRIVER_DATE,
+ .major = PVR_DRIVER_MAJOR,
+ .minor = PVR_DRIVER_MINOR,
+ .patchlevel = PVR_DRIVER_PATCHLEVEL,
+
+};
+
+static int
+pvr_probe(struct platform_device *plat_dev)
+{
+ struct pvr_device *pvr_dev;
+ struct drm_device *drm_dev;
+
+ pvr_dev = devm_drm_dev_alloc(&plat_dev->dev, &pvr_drm_driver,
+ struct pvr_device, base);
+ if (IS_ERR(pvr_dev))
+ return PTR_ERR(pvr_dev);
+
+ drm_dev = &pvr_dev->base;
+
+ platform_set_drvdata(plat_dev, drm_dev);
+
+ return drm_dev_register(drm_dev, 0);
+}
+
+static int
+pvr_remove(struct platform_device *plat_dev)
+{
+ struct drm_device *drm_dev = platform_get_drvdata(plat_dev);
+
+ drm_dev_unplug(drm_dev);
+
+ return 0;
+}
+
+static const struct of_device_id dt_match[] = {
+ { .compatible = "img,img-axe", .data = NULL },
+ {}
+};
+MODULE_DEVICE_TABLE(of, dt_match);
+
+static struct platform_driver pvr_driver = {
+ .probe = pvr_probe,
+ .remove = pvr_remove,
+ .driver = {
+ .name = PVR_DRIVER_NAME,
+ .of_match_table = dt_match,
+ },
+};
+module_platform_driver(pvr_driver);
+
+MODULE_AUTHOR("Imagination Technologies Ltd.");
+MODULE_DESCRIPTION(PVR_DRIVER_DESC);
+MODULE_LICENSE("Dual MIT/GPL");
+MODULE_IMPORT_NS(DMA_BUF);
diff --git a/drivers/gpu/drm/imagination/pvr_drv.h b/drivers/gpu/drm/imagination/pvr_drv.h
new file mode 100644
index 000000000000..c29d11af88fe
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_drv.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_DRV_H
+#define PVR_DRV_H
+
+#include "linux/compiler_attributes.h"
+#include <uapi/drm/pvr_drm.h>
+
+#define PVR_DRIVER_NAME "powervr"
+#define PVR_DRIVER_DESC "Imagination PowerVR (Series 6 and later) & IMG Graphics"
+#define PVR_DRIVER_DATE "20230904"
+
+/*
+ * Driver interface version:
+ * - 1.0: Initial interface
+ */
+#define PVR_DRIVER_MAJOR 1
+#define PVR_DRIVER_MINOR 0
+#define PVR_DRIVER_PATCHLEVEL 0
+
+#endif /* PVR_DRV_H */
--
2.25.1
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