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
26static void
27nv41_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
37static void
38nv41_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
44static void
45nv41_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
60static void
61nv41_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
67static const struct nvkm_vmm_desc_func
68nv41_vmm_desc_pgt = {
69	.unmap = nv41_vmm_pgt_unmap,
70	.dma = nv41_vmm_pgt_dma,
71	.sgl = nv41_vmm_pgt_sgl,
72};
73
74static const struct nvkm_vmm_desc
75nv41_vmm_desc_12[] = {
76	{ PGT, 17, 4, 0x1000, &nv41_vmm_desc_pgt },
77	{}
78};
79
80static void
81nv41_vmm_flush(struct nvkm_vmm *vmm, int level)
82{
83	struct nvkm_device *device = vmm->mmu->subdev.device;
84
85	mutex_lock(&vmm->mmu->mutex);
86	nvkm_wr32(device, 0x100810, 0x00000022);
87	nvkm_msec(device, 2000,
88		if (nvkm_rd32(device, 0x100810) & 0x00000020)
89			break;
90	);
91	nvkm_wr32(device, 0x100810, 0x00000000);
92	mutex_unlock(&vmm->mmu->mutex);
93}
94
95static const struct nvkm_vmm_func
96nv41_vmm = {
97	.valid = nv04_vmm_valid,
98	.flush = nv41_vmm_flush,
99	.page = {
100		{ 12, &nv41_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
101		{}
102	}
103};
104
105int
106nv41_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
107	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
108	     struct nvkm_vmm **pvmm)
109{
110	return nv04_vmm_new_(&nv41_vmm, mmu, 0, managed, addr, size,
111			     argv, argc, key, name, pvmm);
112}
113