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
nv41_vmm_pgt_pte(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map,u64 addr)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
nv41_vmm_pgt_sgl(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map)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
nv41_vmm_pgt_dma(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map)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
nv41_vmm_pgt_unmap(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes)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
nv41_vmm_flush(struct nvkm_vmm * vmm,int level)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
nv41_vmm_new(struct nvkm_mmu * mmu,bool managed,u64 addr,u64 size,void * argv,u32 argc,struct lock_class_key * key,const char * name,struct nvkm_vmm ** pvmm)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
