kfd_mqd_manager.h revision 1.2 
1/*
2 * Copyright 2014 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23
24#ifndef KFD_MQD_MANAGER_H_
25#define KFD_MQD_MANAGER_H_
26
27#include "kfd_priv.h"
28
29#define KFD_MAX_NUM_SE 8
30
31/**
32 * struct mqd_manager
33 *
34 * @init_mqd: Allocates the mqd buffer on local gpu memory and initialize it.
35 *
36 * @load_mqd: Loads the mqd to a concrete hqd slot. Used only for no cp
37 * scheduling mode.
38 *
39 * @update_mqd: Handles a update call for the MQD
40 *
41 * @destroy_mqd: Destroys the HQD slot and by that preempt the relevant queue.
42 * Used only for no cp scheduling.
43 *
44 * @free_mqd: Releases the mqd buffer from local gpu memory.
45 *
46 * @is_occupied: Checks if the relevant HQD slot is occupied.
47 *
48 * @get_wave_state: Retrieves context save state and optionally copies the
49 * control stack, if kept in the MQD, to the given userspace address.
50 *
51 * @mqd_mutex: Mqd manager mutex.
52 *
53 * @dev: The kfd device structure coupled with this module.
54 *
55 * MQD stands for Memory Queue Descriptor which represents the current queue
56 * state in the memory and initiate the HQD (Hardware Queue Descriptor) state.
57 * This structure is actually a base class for the different types of MQDs
58 * structures for the variant ASICs that should be supported in the future.
59 * This base class is also contains all the MQD specific operations.
60 * Another important thing to mention is that each queue has a MQD that keeps
61 * his state (or context) after each preemption or reassignment.
62 * Basically there are a instances of the mqd manager class per MQD type per
63 * ASIC. Currently the kfd driver supports only Kaveri so there are instances
64 * per KFD_MQD_TYPE for each device.
65 *
66 */
67extern int pipe_priority_map[];
68struct mqd_manager {
69	struct kfd_mem_obj*	(*allocate_mqd)(struct kfd_dev *kfd,
70		struct queue_properties *q);
71
72	void	(*init_mqd)(struct mqd_manager *mm, void **mqd,
73			struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
74			struct queue_properties *q);
75
76	int	(*load_mqd)(struct mqd_manager *mm, void *mqd,
77				uint32_t pipe_id, uint32_t queue_id,
78				struct queue_properties *p,
79				struct mm_struct *mms);
80
81	void	(*update_mqd)(struct mqd_manager *mm, void *mqd,
82				struct queue_properties *q);
83
84	int	(*destroy_mqd)(struct mqd_manager *mm, void *mqd,
85				enum kfd_preempt_type type,
86				unsigned int timeout, uint32_t pipe_id,
87				uint32_t queue_id);
88
89	void	(*free_mqd)(struct mqd_manager *mm, void *mqd,
90				struct kfd_mem_obj *mqd_mem_obj);
91
92	bool	(*is_occupied)(struct mqd_manager *mm, void *mqd,
93				uint64_t queue_address,	uint32_t pipe_id,
94				uint32_t queue_id);
95
96	int	(*get_wave_state)(struct mqd_manager *mm, void *mqd,
97				  void __user *ctl_stack,
98				  u32 *ctl_stack_used_size,
99				  u32 *save_area_used_size);
100
101#if defined(CONFIG_DEBUG_FS)
102	int	(*debugfs_show_mqd)(struct seq_file *m, void *data);
103#endif
104
105	struct rwlock	mqd_mutex;
106	struct kfd_dev	*dev;
107	uint32_t mqd_size;
108};
109
110struct kfd_mem_obj *allocate_hiq_mqd(struct kfd_dev *dev,
111				struct queue_properties *q);
112
113struct kfd_mem_obj *allocate_sdma_mqd(struct kfd_dev *dev,
114					struct queue_properties *q);
115void free_mqd_hiq_sdma(struct mqd_manager *mm, void *mqd,
116				struct kfd_mem_obj *mqd_mem_obj);
117
118void mqd_symmetrically_map_cu_mask(struct mqd_manager *mm,
119		const uint32_t *cu_mask, uint32_t cu_mask_count,
120		uint32_t *se_mask);
121
122#endif /* KFD_MQD_MANAGER_H_ */
123