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 <nvif/if000d.h>
 25#include <nvif/unpack.h>
 26
 27static inline void
 28nv04_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 29		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
 30{
 31	u32 data = addr | 0x00000003; /* PRESENT, RW. */
 32	while (ptes--) {
 33		VMM_WO032(pt, vmm, 8 + ptei++ * 4, data);
 34		data += 0x00001000;
 35	}
 36}
 37
 38static void
 39nv04_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 40		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
 41{
 42	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
 43}
 44
 45static void
 46nv04_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
 47		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
 48{
 49#if PAGE_SHIFT == 12
 50	nvkm_kmap(pt->memory);
 51	while (ptes--)
 52		VMM_WO032(pt, vmm, 8 + (ptei++ * 4), *map->dma++ | 0x00000003);
 53	nvkm_done(pt->memory);
 54#else
 55	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
 56#endif
 57}
 58
 59static void
 60nv04_vmm_pgt_unmap(struct nvkm_vmm *vmm,
 61		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
 62{
 63	VMM_FO032(pt, vmm, 8 + (ptei * 4), 0, ptes);
 64}
 65
 66static const struct nvkm_vmm_desc_func
 67nv04_vmm_desc_pgt = {
 68	.unmap = nv04_vmm_pgt_unmap,
 69	.dma = nv04_vmm_pgt_dma,
 70	.sgl = nv04_vmm_pgt_sgl,
 71};
 72
 73static const struct nvkm_vmm_desc
 74nv04_vmm_desc_12[] = {
 75	{ PGT, 15, 4, 0x1000, &nv04_vmm_desc_pgt },
 76	{}
 77};
 78
 79int
 80nv04_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
 81	       struct nvkm_vmm_map *map)
 82{
 83	union {
 84		struct nv04_vmm_map_vn vn;
 85	} *args = argv;
 86	int ret = -ENOSYS;
 87	if ((ret = nvif_unvers(ret, &argv, &argc, args->vn)))
 88		VMM_DEBUG(vmm, "args");
 89	return ret;
 90}
 91
 92static const struct nvkm_vmm_func
 93nv04_vmm = {
 94	.valid = nv04_vmm_valid,
 95	.page = {
 96		{ 12, &nv04_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
 97		{}
 98	}
 99};
100
101int
102nv04_vmm_new_(const struct nvkm_vmm_func *func, struct nvkm_mmu *mmu,
103	      u32 pd_header, bool managed, u64 addr, u64 size,
104	      void *argv, u32 argc, struct lock_class_key *key,
105	      const char *name, struct nvkm_vmm **pvmm)
106{
107	union {
108		struct nv04_vmm_vn vn;
109	} *args = argv;
110	int ret;
111
112	ret = nvkm_vmm_new_(func, mmu, pd_header, managed, addr, size,
113			    key, name, pvmm);
114	if (ret)
115		return ret;
116
117	return nvif_unvers(-ENOSYS, &argv, &argc, args->vn);
118}
119
120int
121nv04_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
122	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
123	     struct nvkm_vmm **pvmm)
124{
125	struct nvkm_memory *mem;
126	struct nvkm_vmm *vmm;
127	int ret;
128
129	ret = nv04_vmm_new_(&nv04_vmm, mmu, 8, managed, addr, size,
130			    argv, argc, key, name, &vmm);
131	*pvmm = vmm;
132	if (ret)
133		return ret;
134
135	mem = vmm->pd->pt[0]->memory;
136	nvkm_kmap(mem);
137	nvkm_wo32(mem, 0x00000, 0x0002103d); /* PCI, RW, PT, !LN */
138	nvkm_wo32(mem, 0x00004, vmm->limit - 1);
139	nvkm_done(mem);
140	return 0;
141}