1 /*
2 * Copyright 2018 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 "amdgpu.h"
25 #include "amdgpu_sdma.h"
26
27 #define AMDGPU_CSA_SDMA_SIZE 64
28 /* SDMA CSA reside in the 3rd page of CSA */
29 #define AMDGPU_CSA_SDMA_OFFSET (4096 * 2)
30
31 /*
32 * GPU SDMA IP block helpers function.
33 */
34
amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring * ring)35 struct amdgpu_sdma_instance *amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring *ring)
36 {
37 struct amdgpu_device *adev = ring->adev;
38 int i;
39
40 for (i = 0; i < adev->sdma.num_instances; i++)
41 if (ring == &adev->sdma.instance[i].ring ||
42 ring == &adev->sdma.instance[i].page)
43 return &adev->sdma.instance[i];
44
45 return NULL;
46 }
47
amdgpu_sdma_get_index_from_ring(struct amdgpu_ring * ring,uint32_t * index)48 int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index)
49 {
50 struct amdgpu_device *adev = ring->adev;
51 int i;
52
53 for (i = 0; i < adev->sdma.num_instances; i++) {
54 if (ring == &adev->sdma.instance[i].ring ||
55 ring == &adev->sdma.instance[i].page) {
56 *index = i;
57 return 0;
58 }
59 }
60
61 return -EINVAL;
62 }
63
amdgpu_sdma_get_csa_mc_addr(struct amdgpu_ring * ring,unsigned vmid)64 uint64_t amdgpu_sdma_get_csa_mc_addr(struct amdgpu_ring *ring,
65 unsigned vmid)
66 {
67 struct amdgpu_device *adev = ring->adev;
68 uint64_t csa_mc_addr;
69 uint32_t index = 0;
70 int r;
71
72 if (vmid == 0 || !amdgpu_mcbp)
73 return 0;
74
75 r = amdgpu_sdma_get_index_from_ring(ring, &index);
76
77 if (r || index > 31)
78 csa_mc_addr = 0;
79 else
80 csa_mc_addr = amdgpu_csa_vaddr(adev) +
81 AMDGPU_CSA_SDMA_OFFSET +
82 index * AMDGPU_CSA_SDMA_SIZE;
83
84 return csa_mc_addr;
85 }
86
