drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gf100.c

   1 /*
   2  * Copyright 2010 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  * Authors: Ben Skeggs
  23  */
  24 #include <subdev/mmu.h>
  25 #include <subdev/fb.h>
  26 #include <subdev/ltc.h>
  27 #include <subdev/timer.h>
  28
  29 #include <core/gpuobj.h>
  30
  31 /* Map from compressed to corresponding uncompressed storage type.
  32  * The value 0xff represents an invalid storage type.
  33  */
  34 const u8 gf100_pte_storage_type_map[256] =
  35 {
  36         0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0xff, 0x01, /* 0x00 */
  37         0x01, 0x01, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff,
  38         0xff, 0x11, 0xff, 0xff, 0xff, 0xff, 0xff, 0x11, /* 0x10 */
  39         0x11, 0x11, 0x11, 0xff, 0xff, 0xff, 0xff, 0xff,
  40         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x26, 0x27, /* 0x20 */
  41         0x28, 0x29, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  42         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x30 */
  43         0xff, 0xff, 0x26, 0x27, 0x28, 0x29, 0x26, 0x27,
  44         0x28, 0x29, 0xff, 0xff, 0xff, 0xff, 0x46, 0xff, /* 0x40 */
  45         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  46         0xff, 0x46, 0x46, 0x46, 0x46, 0xff, 0xff, 0xff, /* 0x50 */
  47         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  48         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x60 */
  49         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  50         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x70 */
  51         0xff, 0xff, 0xff, 0x7b, 0xff, 0xff, 0xff, 0xff,
  52         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7b, 0x7b, /* 0x80 */
  53         0x7b, 0x7b, 0xff, 0x8b, 0x8c, 0x8d, 0x8e, 0xff,
  54         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x90 */
  55         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  56         0xff, 0xff, 0xff, 0x8b, 0x8c, 0x8d, 0x8e, 0xa7, /* 0xa0 */
  57         0xa8, 0xa9, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xff,
  58         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0xb0 */
  59         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xa7,
  60         0xa8, 0xa9, 0xaa, 0xc3, 0xff, 0xff, 0xff, 0xff, /* 0xc0 */
  61         0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe, 0xc3, 0xc3,
  62         0xc3, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0xd0 */
  63         0xfe, 0xff, 0xff, 0xfe, 0xff, 0xfe, 0xff, 0xfe,
  64         0xfe, 0xff, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xff, /* 0xe0 */
  65         0xff, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xfe, 0xff,
  66         0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, /* 0xf0 */
  67         0xfe, 0xfe, 0xfe, 0xfe, 0xff, 0xfd, 0xfe, 0xff
  68 };
  69
  70
  71 static void
  72 gf100_vm_map_pgt(struct nvkm_gpuobj *pgd, u32 index, struct nvkm_memory *pgt[2])
  73 {
  74         u32 pde[2] = { 0, 0 };
  75
  76         if (pgt[0])
  77                 pde[1] = 0x00000001 | (nvkm_memory_addr(pgt[0]) >> 8);
  78         if (pgt[1])
  79                 pde[0] = 0x00000001 | (nvkm_memory_addr(pgt[1]) >> 8);
  80
  81         nvkm_kmap(pgd);
  82         nvkm_wo32(pgd, (index * 8) + 0, pde[0]);
  83         nvkm_wo32(pgd, (index * 8) + 4, pde[1]);
  84         nvkm_done(pgd);
  85 }
  86
  87 static inline u64
  88 gf100_vm_addr(struct nvkm_vma *vma, u64 phys, u32 memtype, u32 target)
  89 {
  90         phys >>= 8;
  91
  92         phys |= 0x00000001; /* present */
  93         if (vma->access & NV_MEM_ACCESS_SYS)
  94                 phys |= 0x00000002;
  95
  96         phys |= ((u64)target  << 32);
  97         phys |= ((u64)memtype << 36);
  98         return phys;
  99 }
 100
 101 static void
 102 gf100_vm_map(struct nvkm_vma *vma, struct nvkm_memory *pgt,
 103              struct nvkm_mem *mem, u32 pte, u32 cnt, u64 phys, u64 delta)
 104 {
 105         u64 next = 1 << (vma->node->type - 8);
 106
 107         phys  = gf100_vm_addr(vma, phys, mem->memtype, 0);
 108         pte <<= 3;
 109
 110         if (mem->tag) {
 111                 struct nvkm_ltc *ltc = nvkm_ltc(vma->vm->mmu);
 112                 u32 tag = mem->tag->offset + (delta >> 17);
 113                 phys |= (u64)tag << (32 + 12);
 114                 next |= (u64)1   << (32 + 12);
 115                 ltc->tags_clear(ltc, tag, cnt);
 116         }
 117
 118         nvkm_kmap(pgt);
 119         while (cnt--) {
 120                 nvkm_wo32(pgt, pte + 0, lower_32_bits(phys));
 121                 nvkm_wo32(pgt, pte + 4, upper_32_bits(phys));
 122                 phys += next;
 123                 pte  += 8;
 124         }
 125         nvkm_done(pgt);
 126 }
 127
 128 static void
 129 gf100_vm_map_sg(struct nvkm_vma *vma, struct nvkm_memory *pgt,
 130                 struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list)
 131 {
 132         u32 target = (vma->access & NV_MEM_ACCESS_NOSNOOP) ? 7 : 5;
 133         /* compressed storage types are invalid for system memory */
 134         u32 memtype = gf100_pte_storage_type_map[mem->memtype & 0xff];
 135
 136         nvkm_kmap(pgt);
 137         pte <<= 3;
 138         while (cnt--) {
 139                 u64 phys = gf100_vm_addr(vma, *list++, memtype, target);
 140                 nvkm_wo32(pgt, pte + 0, lower_32_bits(phys));
 141                 nvkm_wo32(pgt, pte + 4, upper_32_bits(phys));
 142                 pte += 8;
 143         }
 144         nvkm_done(pgt);
 145 }
 146
 147 static void
 148 gf100_vm_unmap(struct nvkm_vma *vma, struct nvkm_memory *pgt, u32 pte, u32 cnt)
 149 {
 150         nvkm_kmap(pgt);
 151         pte <<= 3;
 152         while (cnt--) {
 153                 nvkm_wo32(pgt, pte + 0, 0x00000000);
 154                 nvkm_wo32(pgt, pte + 4, 0x00000000);
 155                 pte += 8;
 156         }
 157         nvkm_done(pgt);
 158 }
 159
 160 static void
 161 gf100_vm_flush(struct nvkm_vm *vm)
 162 {
 163         struct nvkm_mmu *mmu = (void *)vm->mmu;
 164         struct nvkm_device *device = mmu->subdev.device;
 165         struct nvkm_vm_pgd *vpgd;
 166         u32 type;
 167
 168         type = 0x00000001; /* PAGE_ALL */
 169         if (atomic_read(&vm->engref[NVDEV_SUBDEV_BAR]))
 170                 type |= 0x00000004; /* HUB_ONLY */
 171
 172         mutex_lock(&nv_subdev(mmu)->mutex);
 173         list_for_each_entry(vpgd, &vm->pgd_list, head) {
 174                 /* looks like maybe a "free flush slots" counter, the
 175                  * faster you write to 0x100cbc to more it decreases
 176                  */
 177                 nvkm_msec(device, 2000,
 178                         if (nvkm_rd32(device, 0x100c80) & 0x00ff0000)
 179                                 break;
 180                 );
 181
 182                 nvkm_wr32(device, 0x100cb8, vpgd->obj->addr >> 8);
 183                 nvkm_wr32(device, 0x100cbc, 0x80000000 | type);
 184
 185                 /* wait for flush to be queued? */
 186                 nvkm_msec(device, 2000,
 187                         if (nvkm_rd32(device, 0x100c80) & 0x00008000)
 188                                 break;
 189                 );
 190         }
 191         mutex_unlock(&nv_subdev(mmu)->mutex);
 192 }
 193
 194 static int
 195 gf100_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset,
 196                 struct lock_class_key *key, struct nvkm_vm **pvm)
 197 {
 198         return nvkm_vm_create(mmu, offset, length, mm_offset, 4096, key, pvm);
 199 }
 200
 201 static int
 202 gf100_mmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 203                struct nvkm_oclass *oclass, void *data, u32 size,
 204                struct nvkm_object **pobject)
 205 {
 206         struct nvkm_mmu *mmu;
 207         int ret;
 208
 209         ret = nvkm_mmu_create(parent, engine, oclass, "VM", "mmu", &mmu);
 210         *pobject = nv_object(mmu);
 211         if (ret)
 212                 return ret;
 213
 214         mmu->limit = 1ULL << 40;
 215         mmu->dma_bits = 40;
 216         mmu->pgt_bits  = 27 - 12;
 217         mmu->spg_shift = 12;
 218         mmu->lpg_shift = 17;
 219         mmu->create = gf100_vm_create;
 220         mmu->map_pgt = gf100_vm_map_pgt;
 221         mmu->map = gf100_vm_map;
 222         mmu->map_sg = gf100_vm_map_sg;
 223         mmu->unmap = gf100_vm_unmap;
 224         mmu->flush = gf100_vm_flush;
 225         return 0;
 226 }
 227
 228 struct nvkm_oclass
 229 gf100_mmu_oclass = {
 230         .handle = NV_SUBDEV(MMU, 0xc0),
 231         .ofuncs = &(struct nvkm_ofuncs) {
 232                 .ctor = gf100_mmu_ctor,
 233                 .dtor = _nvkm_mmu_dtor,
 234                 .init = _nvkm_mmu_init,
 235                 .fini = _nvkm_mmu_fini,
 236         },
 237 };