1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* 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),
/** @PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED: BO is ready for DebugFS display. */
PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED = BIT(31),
};
/**
* 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__ */
|
