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 #include "kfd_mqd_manager.h"
25 #include "amdgpu_amdkfd.h"
26 
27 void mqd_symmetrically_map_cu_mask(struct mqd_manager *mm,
28 		const uint32_t *cu_mask, uint32_t cu_mask_count,
29 		uint32_t *se_mask)
30 {
31 	struct kfd_cu_info cu_info;
32 	uint32_t cu_per_sh[4] = {0};
33 	int i, se, cu = 0;
34 
35 	amdgpu_amdkfd_get_cu_info(mm->dev->kgd, &cu_info);
36 
37 	if (cu_mask_count > cu_info.cu_active_number)
38 		cu_mask_count = cu_info.cu_active_number;
39 
40 	for (se = 0; se < cu_info.num_shader_engines; se++)
41 		for (i = 0; i < 4; i++)
42 			cu_per_sh[se] += hweight32(cu_info.cu_bitmap[se][i]);
43 
44 	/* Symmetrically map cu_mask to all SEs:
45 	 * cu_mask[0] bit0 -> se_mask[0] bit0;
46 	 * cu_mask[0] bit1 -> se_mask[1] bit0;
47 	 * ... (if # SE is 4)
48 	 * cu_mask[0] bit4 -> se_mask[0] bit1;
49 	 * ...
50 	 */
51 	se = 0;
52 	for (i = 0; i < cu_mask_count; i++) {
53 		if (cu_mask[i / 32] & (1 << (i % 32)))
54 			se_mask[se] |= 1 << cu;
55 
56 		do {
57 			se++;
58 			if (se == cu_info.num_shader_engines) {
59 				se = 0;
60 				cu++;
61 			}
62 		} while (cu >= cu_per_sh[se] && cu < 32);
63 	}
64 }
65