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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
* Copyright 2014 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Author: Andrew Lewycky
*/
#ifndef KFD_PRIV_H_INCLUDED
#define KFD_PRIV_H_INCLUDED
#include <linux/hashtable.h>
#include <linux/mmu_notifier.h>
#include <linux/mutex.h>
#include <linux/radeon_kfd.h>
#include <linux/types.h>
#include <linux/atomic.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
struct kfd_scheduler_class;
#define MAX_KFD_DEVICES 16 /* Global limit - only MAX_KFD_DEVICES will be supported by KFD. */
#define MAX_PROCESS_QUEUES 1024 /* Per-process limit. Each process can only create MAX_PROCESS_QUEUES across all devices. */
#define MAX_DOORBELL_INDEX MAX_PROCESS_QUEUES
#define KFD_SYSFS_FILE_MODE 0444
/* We multiplex different sorts of mmap-able memory onto /dev/kfd.
** We figure out what type of memory the caller wanted by comparing the mmap page offset to known ranges. */
#define KFD_MMAP_DOORBELL_START (((1ULL << 32)*1) >> PAGE_SHIFT)
#define KFD_MMAP_DOORBELL_END (((1ULL << 32)*2) >> PAGE_SHIFT)
/* GPU ID hash width in bits */
#define KFD_GPU_ID_HASH_WIDTH 16
/* Macro for allocating structures */
#define kfd_alloc_struct(ptr_to_struct) ((typeof(ptr_to_struct)) kzalloc(sizeof(*ptr_to_struct), GFP_KERNEL));
/* Large enough to hold the maximum usable pasid + 1.
** It must also be able to store the number of doorbells reported by a KFD device. */
typedef unsigned int pasid_t;
/* Type that represents a HW doorbell slot. */
typedef u32 doorbell_t;
struct kfd_device_info {
const struct kfd_scheduler_class *scheduler_class;
unsigned int max_pasid_bits;
size_t ih_ring_entry_size;
};
struct kfd_dev {
struct kgd_dev *kgd;
const struct kfd_device_info *device_info;
struct pci_dev *pdev;
void __iomem *regs;
bool init_complete;
unsigned int id; /* topology stub index */
phys_addr_t doorbell_base; /* Start of actual doorbells used by KFD. It is aligned for mapping into user mode. */
size_t doorbell_id_offset; /* Doorbell offset (from KFD doorbell to HW doorbell, GFX reserved some at the start). */
size_t doorbell_process_limit; /* Number of processes we have doorbell space for. */
struct kgd2kfd_shared_resources shared_resources;
struct kfd_scheduler *scheduler;
/* Interrupts of interest to KFD are copied from the HW ring into a SW ring. */
bool interrupts_active;
void *interrupt_ring;
size_t interrupt_ring_size;
atomic_t interrupt_ring_rptr;
atomic_t interrupt_ring_wptr;
struct work_struct interrupt_work;
spinlock_t interrupt_lock;
};
/* KGD2KFD callbacks */
void kgd2kfd_exit(void);
struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev);
bool kgd2kfd_device_init(struct kfd_dev *kfd,
const struct kgd2kfd_shared_resources *gpu_resources);
void kgd2kfd_device_exit(struct kfd_dev *kfd);
extern const struct kfd2kgd_calls *kfd2kgd;
/* KFD2KGD callback wrappers */
void radeon_kfd_lock_srbm_index(struct kfd_dev *kfd);
void radeon_kfd_unlock_srbm_index(struct kfd_dev *kfd);
enum kfd_mempool {
KFD_MEMPOOL_SYSTEM_CACHEABLE = 1,
KFD_MEMPOOL_SYSTEM_WRITECOMBINE = 2,
KFD_MEMPOOL_FRAMEBUFFER = 3,
};
struct kfd_mem_obj_s; /* Dummy struct just to make kfd_mem_obj* a unique pointer type. */
typedef struct kfd_mem_obj_s *kfd_mem_obj;
int radeon_kfd_vidmem_alloc(struct kfd_dev *kfd, size_t size, size_t alignment, enum kfd_mempool pool, kfd_mem_obj *mem_obj);
void radeon_kfd_vidmem_free(struct kfd_dev *kfd, kfd_mem_obj mem_obj);
int radeon_kfd_vidmem_gpumap(struct kfd_dev *kfd, kfd_mem_obj mem_obj, uint64_t *vmid0_address);
void radeon_kfd_vidmem_ungpumap(struct kfd_dev *kfd, kfd_mem_obj mem_obj);
int radeon_kfd_vidmem_kmap(struct kfd_dev *kfd, kfd_mem_obj mem_obj, void **ptr);
void radeon_kfd_vidmem_unkmap(struct kfd_dev *kfd, kfd_mem_obj mem_obj);
/* Character device interface */
int radeon_kfd_chardev_init(void);
void radeon_kfd_chardev_exit(void);
struct device *radeon_kfd_chardev(void);
/* Scheduler */
struct kfd_scheduler;
struct kfd_scheduler_process;
struct kfd_scheduler_queue {
uint64_t dummy;
};
struct kfd_queue {
struct kfd_dev *dev;
/* scheduler_queue must be last. It is variable sized (dev->device_info->scheduler_class->queue_size) */
struct kfd_scheduler_queue scheduler_queue;
};
/* Data that is per-process-per device. */
struct kfd_process_device {
/* List of all per-device data for a process. Starts from kfd_process.per_device_data. */
struct list_head per_device_list;
/* The device that owns this data. */
struct kfd_dev *dev;
/* The user-mode address of the doorbell mapping for this device. */
doorbell_t __user *doorbell_mapping;
/* Scheduler process data for this device. */
struct kfd_scheduler_process *scheduler_process;
/* Is this process/pasid bound to this device? (amd_iommu_bind_pasid) */
bool bound;
};
/* Process data */
struct kfd_process {
/* kfd_process are stored in an mm_struct*->kfd_process* hash table (kfd_processes in kfd_process.c) */
struct hlist_node kfd_processes;
struct mm_struct *mm;
struct mutex mutex;
/* In any process, the thread that started main() is the lead thread and outlives the rest.
* It is here because amd_iommu_bind_pasid wants a task_struct. */
struct task_struct *lead_thread;
/* We want to receive a notification when the mm_struct is destroyed. */
struct mmu_notifier mmu_notifier;
pasid_t pasid;
/* List of kfd_process_device structures, one for each device the process is using. */
struct list_head per_device_data;
/* The process's queues. */
size_t queue_array_size;
struct kfd_queue **queues; /* Size is queue_array_size, up to MAX_PROCESS_QUEUES. */
unsigned long allocated_queue_bitmap[DIV_ROUND_UP(MAX_PROCESS_QUEUES, BITS_PER_LONG)];
};
struct kfd_process *radeon_kfd_create_process(const struct task_struct *);
struct kfd_process *radeon_kfd_get_process(const struct task_struct *);
struct kfd_process_device *radeon_kfd_bind_process_to_device(struct kfd_dev *dev, struct kfd_process *p);
void radeon_kfd_unbind_process_from_device(struct kfd_dev *dev, pasid_t pasid);
struct kfd_process_device *radeon_kfd_get_process_device_data(struct kfd_dev *dev, struct kfd_process *p);
bool radeon_kfd_allocate_queue_id(struct kfd_process *p, unsigned int *queue_id);
void radeon_kfd_install_queue(struct kfd_process *p, unsigned int queue_id, struct kfd_queue *queue);
void radeon_kfd_remove_queue(struct kfd_process *p, unsigned int queue_id);
struct kfd_queue *radeon_kfd_get_queue(struct kfd_process *p, unsigned int queue_id);
/* PASIDs */
int radeon_kfd_pasid_init(void);
void radeon_kfd_pasid_exit(void);
bool radeon_kfd_set_pasid_limit(pasid_t new_limit);
pasid_t radeon_kfd_get_pasid_limit(void);
pasid_t radeon_kfd_pasid_alloc(void);
void radeon_kfd_pasid_free(pasid_t pasid);
/* Doorbells */
void radeon_kfd_doorbell_init(struct kfd_dev *kfd);
int radeon_kfd_doorbell_mmap(struct kfd_process *process, struct vm_area_struct *vma);
doorbell_t __user *radeon_kfd_get_doorbell(struct file *devkfd, struct kfd_process *process, struct kfd_dev *dev,
unsigned int doorbell_index);
unsigned int radeon_kfd_queue_id_to_doorbell(struct kfd_dev *kfd, struct kfd_process *process, unsigned int queue_id);
void radeon_kfd_doorbell_unmap(struct kfd_process_device *pdd);
extern struct device *kfd_device;
/* Topology */
int kfd_topology_init(void);
void kfd_topology_shutdown(void);
int kfd_topology_add_device(struct kfd_dev *gpu);
int kfd_topology_remove_device(struct kfd_dev *gpu);
struct kfd_dev *radeon_kfd_device_by_id(uint32_t gpu_id);
struct kfd_dev *radeon_kfd_device_by_pci_dev(const struct pci_dev *pdev);
/* MMIO registers */
#define WRITE_REG(dev, reg, value) radeon_kfd_write_reg((dev), (reg), (value))
#define READ_REG(dev, reg) radeon_kfd_read_reg((dev), (reg))
void radeon_kfd_write_reg(struct kfd_dev *dev, uint32_t reg, uint32_t value);
uint32_t radeon_kfd_read_reg(struct kfd_dev *dev, uint32_t reg);
/* Interrupts */
int radeon_kfd_interrupt_init(struct kfd_dev *dev);
void radeon_kfd_interrupt_exit(struct kfd_dev *dev);
void kgd2kfd_interrupt(struct kfd_dev *dev, const void *ih_ring_entry);
/* Power Management */
void kgd2kfd_suspend(struct kfd_dev *dev);
int kgd2kfd_resume(struct kfd_dev *dev);
#endif
|
