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 /**
30  * struct mqd_manager
31  *
32  * @init_mqd: Allocates the mqd buffer on local gpu memory and initialize it.
33  *
34  * @load_mqd: Loads the mqd to a concrete hqd slot. Used only for no cp
35  * scheduling mode.
36  *
37  * @update_mqd: Handles a update call for the MQD
38  *
39  * @destroy_mqd: Destroys the HQD slot and by that preempt the relevant queue.
40  * Used only for no cp scheduling.
41  *
42  * @free_mqd: Releases the mqd buffer from local gpu memory.
43  *
44  * @is_occupied: Checks if the relevant HQD slot is occupied.
45  *
46  * @get_wave_state: Retrieves context save state and optionally copies the
47  * control stack, if kept in the MQD, to the given userspace address.
48  *
49  * @mqd_mutex: Mqd manager mutex.
50  *
51  * @dev: The kfd device structure coupled with this module.
52  *
53  * MQD stands for Memory Queue Descriptor which represents the current queue
54  * state in the memory and initiate the HQD (Hardware Queue Descriptor) state.
55  * This structure is actually a base class for the different types of MQDs
56  * structures for the variant ASICs that should be supported in the future.
57  * This base class is also contains all the MQD specific operations.
58  * Another important thing to mention is that each queue has a MQD that keeps
59  * his state (or context) after each preemption or reassignment.
60  * Basically there are a instances of the mqd manager class per MQD type per
61  * ASIC. Currently the kfd driver supports only Kaveri so there are instances
62  * per KFD_MQD_TYPE for each device.
63  *
64  */
65 extern int pipe_priority_map[];
66 struct mqd_manager {
67 	struct kfd_mem_obj*	(*allocate_mqd)(struct kfd_dev *kfd,
68 		struct queue_properties *q);
69 
70 	void	(*init_mqd)(struct mqd_manager *mm, void **mqd,
71 			struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
72 			struct queue_properties *q);
73 
74 	int	(*load_mqd)(struct mqd_manager *mm, void *mqd,
75 				uint32_t pipe_id, uint32_t queue_id,
76 				struct queue_properties *p,
77 				struct mm_struct *mms);
78 
79 	void	(*update_mqd)(struct mqd_manager *mm, void *mqd,
80 				struct queue_properties *q);
81 
82 	int	(*destroy_mqd)(struct mqd_manager *mm, void *mqd,
83 				enum kfd_preempt_type type,
84 				unsigned int timeout, uint32_t pipe_id,
85 				uint32_t queue_id);
86 
87 	void	(*free_mqd)(struct mqd_manager *mm, void *mqd,
88 				struct kfd_mem_obj *mqd_mem_obj);
89 
90 	bool	(*is_occupied)(struct mqd_manager *mm, void *mqd,
91 				uint64_t queue_address,	uint32_t pipe_id,
92 				uint32_t queue_id);
93 
94 	int	(*get_wave_state)(struct mqd_manager *mm, void *mqd,
95 				  void __user *ctl_stack,
96 				  u32 *ctl_stack_used_size,
97 				  u32 *save_area_used_size);
98 
99 #if defined(CONFIG_DEBUG_FS)
100 	int	(*debugfs_show_mqd)(struct seq_file *m, void *data);
101 #endif
102 
103 	struct mutex	mqd_mutex;
104 	struct kfd_dev	*dev;
105 	uint32_t mqd_size;
106 };
107 
108 struct kfd_mem_obj *allocate_hiq_mqd(struct kfd_dev *dev,
109 				struct queue_properties *q);
110 
111 struct kfd_mem_obj *allocate_sdma_mqd(struct kfd_dev *dev,
112 					struct queue_properties *q);
113 void free_mqd_hiq_sdma(struct mqd_manager *mm, void *mqd,
114 				struct kfd_mem_obj *mqd_mem_obj);
115 
116 void mqd_symmetrically_map_cu_mask(struct mqd_manager *mm,
117 		const uint32_t *cu_mask, uint32_t cu_mask_count,
118 		uint32_t *se_mask);
119 
120 #endif /* KFD_MQD_MANAGER_H_ */
121