/* SPDX-License-Identifier: GPL-2.0 or MIT */
/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
/* Copyright 2023 Collabora ltd. */
#ifndef __PANTHOR_GEM_H__
#define __PANTHOR_GEM_H__
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_mm.h>
#include <linux/iosys-map.h>
#include <linux/rwsem.h>
struct panthor_vm;
#define PANTHOR_BO_LABEL_MAXLEN 4096
enum panthor_debugfs_gem_state_flags {
PANTHOR_DEBUGFS_GEM_STATE_IMPORTED_BIT = 0 ,
PANTHOR_DEBUGFS_GEM_STATE_EXPORTED_BIT = 1 ,
/** @PANTHOR_DEBUGFS_GEM_STATE_FLAG_IMPORTED: GEM BO is PRIME imported. */
PANTHOR_DEBUGFS_GEM_STATE_FLAG_IMPORTED = BIT(PANTHOR_DEBUGFS_GEM_STATE_IMPORTED_BIT),
/** @PANTHOR_DEBUGFS_GEM_STATE_FLAG_EXPORTED: GEM BO is PRIME exported. */
PANTHOR_DEBUGFS_GEM_STATE_FLAG_EXPORTED = BIT(PANTHOR_DEBUGFS_GEM_STATE_EXPORTED_BIT),
};
enum panthor_debugfs_gem_usage_flags {
PANTHOR_DEBUGFS_GEM_USAGE_KERNEL_BIT = 0 ,
PANTHOR_DEBUGFS_GEM_USAGE_FW_MAPPED_BIT = 1 ,
/** @PANTHOR_DEBUGFS_GEM_USAGE_FLAG_KERNEL: BO is for kernel use only. */
PANTHOR_DEBUGFS_GEM_USAGE_FLAG_KERNEL = BIT(PANTHOR_DEBUGFS_GEM_USAGE_KERNEL_BIT),
/** @PANTHOR_DEBUGFS_GEM_USAGE_FLAG_FW_MAPPED: BO is mapped on the FW VM. */
PANTHOR_DEBUGFS_GEM_USAGE_FLAG_FW_MAPPED = BIT(PANTHOR_DEBUGFS_GEM_USAGE_FW_MAPPED_BIT),
};
/**
* struct panthor_gem_debugfs - GEM object ' s DebugFS list information
*/
struct panthor_gem_debugfs {
/**
* @ node : Node used to insert the object in the device - wide list of
* GEM objects , to display information about it through a DebugFS file .
*/
struct list_head node;
/** @creator: Information about the UM process which created the GEM. */
struct {
/** @creator.process_name: Group leader name in owning thread's process */
char process_name[TASK_COMM_LEN];
/** @creator.tgid: PID of the thread's group leader within its process */
pid_t tgid;
} creator;
/** @flags: Combination of panthor_debugfs_gem_usage_flags flags */
u32 flags;
};
/**
* struct panthor_gem_object - Driver specific GEM object .
*/
struct panthor_gem_object {
/** @base: Inherit from drm_gem_shmem_object. */
struct drm_gem_shmem_object base;
/**
* @ exclusive_vm_root_gem : Root GEM of the exclusive VM this GEM object
* is attached to .
*
* If @ exclusive_vm_root_gem ! = NULL , any attempt to bind the GEM to a
* different VM will fail .
*
* All FW memory objects have this field set to the root GEM of the MCU
* VM .
*/
struct drm_gem_object *exclusive_vm_root_gem;
/**
* @ gpuva_list_lock : Custom GPUVA lock .
*
* Used to protect insertion of drm_gpuva elements to the
* drm_gem_object . gpuva . list list .
*
* We can ' t use the GEM resv for that , because drm_gpuva_link ( ) is
* called in a dma - signaling path , where we ' re not allowed to take
* resv locks .
*/
struct mutex gpuva_list_lock;
/** @flags: Combination of drm_panthor_bo_flags flags. */
u32 flags;
/**
* @ label : BO tagging fields . The label can be assigned within the
* driver itself or through a specific IOCTL .
*/
struct {
/**
* @ label . str : Pointer to NULL - terminated string ,
*/
const char *str;
/** @lock.str: Protects access to the @label.str field. */
struct mutex lock;
} label;
#ifdef CONFIG_DEBUG_FS
struct panthor_gem_debugfs debugfs;
#endif
};
/**
* struct panthor_kernel_bo - Kernel buffer object .
*
* These objects are only manipulated by the kernel driver and not
* directly exposed to the userspace . The GPU address of a kernel
* BO might be passed to userspace though .
*/
struct panthor_kernel_bo {
/**
* @ obj : The GEM object backing this kernel buffer object .
*/
struct drm_gem_object *obj;
/**
* @ vm : VM this private buffer is attached to .
*/
struct panthor_vm *vm;
/**
* @ va_node : VA space allocated to this GEM .
*/
struct drm_mm_node va_node;
/**
* @ kmap : Kernel CPU mapping of @ gem .
*/
void *kmap;
};
static inline
struct panthor_gem_object *to_panthor_bo(struct drm_gem_object *obj)
{
return container_of(to_drm_gem_shmem_obj(obj), struct panthor_gem_object, base);
}
struct drm_gem_object *panthor_gem_create_object(struct drm_device *ddev, size_t size);
int
panthor_gem_create_with_handle(struct drm_file *file,
struct drm_device *ddev,
struct panthor_vm *exclusive_vm,
u64 *size, u32 flags, uint32_t *handle);
void panthor_gem_bo_set_label(struct drm_gem_object *obj, const char *label);
void panthor_gem_kernel_bo_set_label(struct panthor_kernel_bo *bo, const char *label);
static inline u64
panthor_kernel_bo_gpuva(struct panthor_kernel_bo *bo)
{
return bo->va_node.start;
}
static inline size_t
panthor_kernel_bo_size(struct panthor_kernel_bo *bo)
{
return bo->obj->size;
}
static inline int
panthor_kernel_bo_vmap(struct panthor_kernel_bo *bo)
{
struct iosys_map map;
int ret;
if (bo->kmap)
return 0 ;
ret = drm_gem_vmap(bo->obj, &map);
if (ret)
return ret;
bo->kmap = map.vaddr;
return 0 ;
}
static inline void
panthor_kernel_bo_vunmap(struct panthor_kernel_bo *bo)
{
if (bo->kmap) {
struct iosys_map map = IOSYS_MAP_INIT_VADDR(bo->kmap);
drm_gem_vunmap(bo->obj, &map);
bo->kmap = NULL;
}
}
struct panthor_kernel_bo *
panthor_kernel_bo_create(struct panthor_device *ptdev, struct panthor_vm *vm,
size_t size, u32 bo_flags, u32 vm_map_flags,
u64 gpu_va, const char *name);
void panthor_kernel_bo_destroy(struct panthor_kernel_bo *bo);
#ifdef CONFIG_DEBUG_FS
void panthor_gem_debugfs_print_bos(struct panthor_device *pfdev,
struct seq_file *m);
#endif
#endif /* __PANTHOR_GEM_H__ */
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