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/timer.h> 27 28 #include <core/engine.h> 29 #include <core/gpuobj.h> 30 31 static void 32 nv50_vm_map_pgt(struct nvkm_gpuobj *pgd, u32 pde, struct nvkm_memory *pgt[2]) 33 { 34 u64 phys = 0xdeadcafe00000000ULL; 35 u32 coverage = 0; 36 37 if (pgt[0]) { 38 /* present, 4KiB pages */ 39 phys = 0x00000003 | nvkm_memory_addr(pgt[0]); 40 coverage = (nvkm_memory_size(pgt[0]) >> 3) << 12; 41 } else 42 if (pgt[1]) { 43 /* present, 64KiB pages */ 44 phys = 0x00000001 | nvkm_memory_addr(pgt[1]); 45 coverage = (nvkm_memory_size(pgt[1]) >> 3) << 16; 46 } 47 48 if (phys & 1) { 49 if (coverage <= 32 * 1024 * 1024) 50 phys |= 0x60; 51 else if (coverage <= 64 * 1024 * 1024) 52 phys |= 0x40; 53 else if (coverage <= 128 * 1024 * 1024) 54 phys |= 0x20; 55 } 56 57 nvkm_kmap(pgd); 58 nvkm_wo32(pgd, (pde * 8) + 0, lower_32_bits(phys)); 59 nvkm_wo32(pgd, (pde * 8) + 4, upper_32_bits(phys)); 60 nvkm_done(pgd); 61 } 62 63 static inline u64 64 vm_addr(struct nvkm_vma *vma, u64 phys, u32 memtype, u32 target) 65 { 66 phys |= 1; /* present */ 67 phys |= (u64)memtype << 40; 68 phys |= target << 4; 69 if (vma->access & NV_MEM_ACCESS_SYS) 70 phys |= (1 << 6); 71 if (!(vma->access & NV_MEM_ACCESS_WO)) 72 phys |= (1 << 3); 73 return phys; 74 } 75 76 static void 77 nv50_vm_map(struct nvkm_vma *vma, struct nvkm_memory *pgt, 78 struct nvkm_mem *mem, u32 pte, u32 cnt, u64 phys, u64 delta) 79 { 80 struct nvkm_ram *ram = vma->vm->mmu->subdev.device->fb->ram; 81 u32 comp = (mem->memtype & 0x180) >> 7; 82 u32 block, target; 83 int i; 84 85 /* IGPs don't have real VRAM, re-target to stolen system memory */ 86 target = 0; 87 if (ram->stolen) { 88 phys += ram->stolen; 89 target = 3; 90 } 91 92 phys = vm_addr(vma, phys, mem->memtype, target); 93 pte <<= 3; 94 cnt <<= 3; 95 96 nvkm_kmap(pgt); 97 while (cnt) { 98 u32 offset_h = upper_32_bits(phys); 99 u32 offset_l = lower_32_bits(phys); 100 101 for (i = 7; i >= 0; i--) { 102 block = 1 << (i + 3); 103 if (cnt >= block && !(pte & (block - 1))) 104 break; 105 } 106 offset_l |= (i << 7); 107 108 phys += block << (vma->node->type - 3); 109 cnt -= block; 110 if (comp) { 111 u32 tag = mem->tag->offset + ((delta >> 16) * comp); 112 offset_h |= (tag << 17); 113 delta += block << (vma->node->type - 3); 114 } 115 116 while (block) { 117 nvkm_wo32(pgt, pte + 0, offset_l); 118 nvkm_wo32(pgt, pte + 4, offset_h); 119 pte += 8; 120 block -= 8; 121 } 122 } 123 nvkm_done(pgt); 124 } 125 126 static void 127 nv50_vm_map_sg(struct nvkm_vma *vma, struct nvkm_memory *pgt, 128 struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list) 129 { 130 u32 target = (vma->access & NV_MEM_ACCESS_NOSNOOP) ? 3 : 2; 131 pte <<= 3; 132 nvkm_kmap(pgt); 133 while (cnt--) { 134 u64 phys = vm_addr(vma, (u64)*list++, mem->memtype, target); 135 nvkm_wo32(pgt, pte + 0, lower_32_bits(phys)); 136 nvkm_wo32(pgt, pte + 4, upper_32_bits(phys)); 137 pte += 8; 138 } 139 nvkm_done(pgt); 140 } 141 142 static void 143 nv50_vm_unmap(struct nvkm_vma *vma, struct nvkm_memory *pgt, u32 pte, u32 cnt) 144 { 145 pte <<= 3; 146 nvkm_kmap(pgt); 147 while (cnt--) { 148 nvkm_wo32(pgt, pte + 0, 0x00000000); 149 nvkm_wo32(pgt, pte + 4, 0x00000000); 150 pte += 8; 151 } 152 nvkm_done(pgt); 153 } 154 155 static void 156 nv50_vm_flush(struct nvkm_vm *vm) 157 { 158 struct nvkm_mmu *mmu = (void *)vm->mmu; 159 struct nvkm_subdev *subdev = &mmu->subdev; 160 struct nvkm_device *device = subdev->device; 161 struct nvkm_engine *engine; 162 int i, vme; 163 164 mutex_lock(&subdev->mutex); 165 for (i = 0; i < NVDEV_SUBDEV_NR; i++) { 166 if (!atomic_read(&vm->engref[i])) 167 continue; 168 169 /* unfortunate hw bug workaround... */ 170 engine = nvkm_engine(mmu, i); 171 if (engine && engine->tlb_flush) { 172 engine->tlb_flush(engine); 173 continue; 174 } 175 176 switch (i) { 177 case NVDEV_ENGINE_GR : vme = 0x00; break; 178 case NVDEV_ENGINE_VP : 179 case NVDEV_ENGINE_MSPDEC: vme = 0x01; break; 180 case NVDEV_SUBDEV_BAR : vme = 0x06; break; 181 case NVDEV_ENGINE_MSPPP : 182 case NVDEV_ENGINE_MPEG : vme = 0x08; break; 183 case NVDEV_ENGINE_BSP : 184 case NVDEV_ENGINE_MSVLD : vme = 0x09; break; 185 case NVDEV_ENGINE_CIPHER: 186 case NVDEV_ENGINE_SEC : vme = 0x0a; break; 187 case NVDEV_ENGINE_CE0 : vme = 0x0d; break; 188 default: 189 continue; 190 } 191 192 nvkm_wr32(device, 0x100c80, (vme << 16) | 1); 193 if (nvkm_msec(device, 2000, 194 if (!(nvkm_rd32(device, 0x100c80) & 0x00000001)) 195 break; 196 ) < 0) 197 nvkm_error(subdev, "vm flush timeout: engine %d\n", vme); 198 } 199 mutex_unlock(&subdev->mutex); 200 } 201 202 static int 203 nv50_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset, 204 struct lock_class_key *key, struct nvkm_vm **pvm) 205 { 206 u32 block = (1 << (mmu->pgt_bits + 12)); 207 if (block > length) 208 block = length; 209 210 return nvkm_vm_create(mmu, offset, length, mm_offset, block, key, pvm); 211 } 212 213 static int 214 nv50_mmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 215 struct nvkm_oclass *oclass, void *data, u32 size, 216 struct nvkm_object **pobject) 217 { 218 struct nvkm_mmu *mmu; 219 int ret; 220 221 ret = nvkm_mmu_create(parent, engine, oclass, "VM", "mmu", &mmu); 222 *pobject = nv_object(mmu); 223 if (ret) 224 return ret; 225 226 mmu->limit = 1ULL << 40; 227 mmu->dma_bits = 40; 228 mmu->pgt_bits = 29 - 12; 229 mmu->spg_shift = 12; 230 mmu->lpg_shift = 16; 231 mmu->create = nv50_vm_create; 232 mmu->map_pgt = nv50_vm_map_pgt; 233 mmu->map = nv50_vm_map; 234 mmu->map_sg = nv50_vm_map_sg; 235 mmu->unmap = nv50_vm_unmap; 236 mmu->flush = nv50_vm_flush; 237 return 0; 238 } 239 240 struct nvkm_oclass 241 nv50_mmu_oclass = { 242 .handle = NV_SUBDEV(MMU, 0x50), 243 .ofuncs = &(struct nvkm_ofuncs) { 244 .ctor = nv50_mmu_ctor, 245 .dtor = _nvkm_mmu_dtor, 246 .init = _nvkm_mmu_init, 247 .fini = _nvkm_mmu_fini, 248 }, 249 }; 250