1 /*
2  * Copyright 2017 Red Hat 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 #include "vmm.h"
23 
24 #include <subdev/timer.h>
25 
26 static void
27 nv41_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
28 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
29 {
30 	u32 data = (addr >> 7) | 0x00000001; /* VALID. */
31 	while (ptes--) {
32 		VMM_WO032(pt, vmm, ptei++ * 4, data);
33 		data += 0x00000020;
34 	}
35 }
36 
37 static void
38 nv41_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
39 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
40 {
41 	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv41_vmm_pgt_pte);
42 }
43 
44 static void
45 nv41_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
46 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
47 {
48 #if PAGE_SHIFT == 12
49 	nvkm_kmap(pt->memory);
50 	while (ptes--) {
51 		const u32 data = (*map->dma++ >> 7) | 0x00000001;
52 		VMM_WO032(pt, vmm, ptei++ * 4, data);
53 	}
54 	nvkm_done(pt->memory);
55 #else
56 	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv41_vmm_pgt_pte);
57 #endif
58 }
59 
60 static void
61 nv41_vmm_pgt_unmap(struct nvkm_vmm *vmm,
62 		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
63 {
64 	VMM_FO032(pt, vmm, ptei * 4, 0, ptes);
65 }
66 
67 static const struct nvkm_vmm_desc_func
68 nv41_vmm_desc_pgt = {
69 	.unmap = nv41_vmm_pgt_unmap,
70 	.dma = nv41_vmm_pgt_dma,
71 	.sgl = nv41_vmm_pgt_sgl,
72 };
73 
74 static const struct nvkm_vmm_desc
75 nv41_vmm_desc_12[] = {
76 	{ PGT, 17, 4, 0x1000, &nv41_vmm_desc_pgt },
77 	{}
78 };
79 
80 static void
81 nv41_vmm_flush(struct nvkm_vmm *vmm, int level)
82 {
83 	struct nvkm_subdev *subdev = &vmm->mmu->subdev;
84 	struct nvkm_device *device = subdev->device;
85 
86 	mutex_lock(&subdev->mutex);
87 	nvkm_wr32(device, 0x100810, 0x00000022);
88 	nvkm_msec(device, 2000,
89 		if (nvkm_rd32(device, 0x100810) & 0x00000020)
90 			break;
91 	);
92 	nvkm_wr32(device, 0x100810, 0x00000000);
93 	mutex_unlock(&subdev->mutex);
94 }
95 
96 static const struct nvkm_vmm_func
97 nv41_vmm = {
98 	.valid = nv04_vmm_valid,
99 	.flush = nv41_vmm_flush,
100 	.page = {
101 		{ 12, &nv41_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
102 		{}
103 	}
104 };
105 
106 int
107 nv41_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
108 	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
109 	     struct nvkm_vmm **pvmm)
110 {
111 	return nv04_vmm_new_(&nv41_vmm, mmu, 0, managed, addr, size,
112 			     argv, argc, key, name, pvmm);
113 }
114