1 /* 2 * Copyright 2012 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 "nv04.h" 25 26 #include <core/gpuobj.h> 27 #include <core/option.h> 28 #include <subdev/timer.h> 29 30 #define NV44_GART_SIZE (512 * 1024 * 1024) 31 #define NV44_GART_PAGE ( 4 * 1024) 32 33 /******************************************************************************* 34 * VM map/unmap callbacks 35 ******************************************************************************/ 36 37 static void 38 nv44_vm_fill(struct nvkm_gpuobj *pgt, dma_addr_t null, 39 dma_addr_t *list, u32 pte, u32 cnt) 40 { 41 u32 base = (pte << 2) & ~0x0000000f; 42 u32 tmp[4]; 43 44 tmp[0] = nv_ro32(pgt, base + 0x0); 45 tmp[1] = nv_ro32(pgt, base + 0x4); 46 tmp[2] = nv_ro32(pgt, base + 0x8); 47 tmp[3] = nv_ro32(pgt, base + 0xc); 48 49 while (cnt--) { 50 u32 addr = list ? (*list++ >> 12) : (null >> 12); 51 switch (pte++ & 0x3) { 52 case 0: 53 tmp[0] &= ~0x07ffffff; 54 tmp[0] |= addr; 55 break; 56 case 1: 57 tmp[0] &= ~0xf8000000; 58 tmp[0] |= addr << 27; 59 tmp[1] &= ~0x003fffff; 60 tmp[1] |= addr >> 5; 61 break; 62 case 2: 63 tmp[1] &= ~0xffc00000; 64 tmp[1] |= addr << 22; 65 tmp[2] &= ~0x0001ffff; 66 tmp[2] |= addr >> 10; 67 break; 68 case 3: 69 tmp[2] &= ~0xfffe0000; 70 tmp[2] |= addr << 17; 71 tmp[3] &= ~0x00000fff; 72 tmp[3] |= addr >> 15; 73 break; 74 } 75 } 76 77 nv_wo32(pgt, base + 0x0, tmp[0]); 78 nv_wo32(pgt, base + 0x4, tmp[1]); 79 nv_wo32(pgt, base + 0x8, tmp[2]); 80 nv_wo32(pgt, base + 0xc, tmp[3] | 0x40000000); 81 } 82 83 static void 84 nv44_vm_map_sg(struct nvkm_vma *vma, struct nvkm_gpuobj *pgt, 85 struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list) 86 { 87 struct nv04_mmu *mmu = (void *)vma->vm->mmu; 88 u32 tmp[4]; 89 int i; 90 91 if (pte & 3) { 92 u32 max = 4 - (pte & 3); 93 u32 part = (cnt > max) ? max : cnt; 94 nv44_vm_fill(pgt, mmu->null, list, pte, part); 95 pte += part; 96 list += part; 97 cnt -= part; 98 } 99 100 while (cnt >= 4) { 101 for (i = 0; i < 4; i++) 102 tmp[i] = *list++ >> 12; 103 nv_wo32(pgt, pte++ * 4, tmp[0] >> 0 | tmp[1] << 27); 104 nv_wo32(pgt, pte++ * 4, tmp[1] >> 5 | tmp[2] << 22); 105 nv_wo32(pgt, pte++ * 4, tmp[2] >> 10 | tmp[3] << 17); 106 nv_wo32(pgt, pte++ * 4, tmp[3] >> 15 | 0x40000000); 107 cnt -= 4; 108 } 109 110 if (cnt) 111 nv44_vm_fill(pgt, mmu->null, list, pte, cnt); 112 } 113 114 static void 115 nv44_vm_unmap(struct nvkm_gpuobj *pgt, u32 pte, u32 cnt) 116 { 117 struct nv04_mmu *mmu = (void *)nvkm_mmu(pgt); 118 119 if (pte & 3) { 120 u32 max = 4 - (pte & 3); 121 u32 part = (cnt > max) ? max : cnt; 122 nv44_vm_fill(pgt, mmu->null, NULL, pte, part); 123 pte += part; 124 cnt -= part; 125 } 126 127 while (cnt >= 4) { 128 nv_wo32(pgt, pte++ * 4, 0x00000000); 129 nv_wo32(pgt, pte++ * 4, 0x00000000); 130 nv_wo32(pgt, pte++ * 4, 0x00000000); 131 nv_wo32(pgt, pte++ * 4, 0x00000000); 132 cnt -= 4; 133 } 134 135 if (cnt) 136 nv44_vm_fill(pgt, mmu->null, NULL, pte, cnt); 137 } 138 139 static void 140 nv44_vm_flush(struct nvkm_vm *vm) 141 { 142 struct nv04_mmu *mmu = (void *)vm->mmu; 143 nv_wr32(mmu, 0x100814, mmu->base.limit - NV44_GART_PAGE); 144 nv_wr32(mmu, 0x100808, 0x00000020); 145 if (!nv_wait(mmu, 0x100808, 0x00000001, 0x00000001)) 146 nv_error(mmu, "timeout: 0x%08x\n", nv_rd32(mmu, 0x100808)); 147 nv_wr32(mmu, 0x100808, 0x00000000); 148 } 149 150 /******************************************************************************* 151 * MMU subdev 152 ******************************************************************************/ 153 154 static int 155 nv44_mmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 156 struct nvkm_oclass *oclass, void *data, u32 size, 157 struct nvkm_object **pobject) 158 { 159 struct nvkm_device *device = nv_device(parent); 160 struct nv04_mmu *mmu; 161 int ret; 162 163 if (pci_find_capability(device->pdev, PCI_CAP_ID_AGP) || 164 !nvkm_boolopt(device->cfgopt, "NvPCIE", true)) { 165 return nvkm_object_ctor(parent, engine, &nv04_mmu_oclass, 166 data, size, pobject); 167 } 168 169 ret = nvkm_mmu_create(parent, engine, oclass, "PCIEGART", 170 "mmu", &mmu); 171 *pobject = nv_object(mmu); 172 if (ret) 173 return ret; 174 175 mmu->base.create = nv04_vm_create; 176 mmu->base.limit = NV44_GART_SIZE; 177 mmu->base.dma_bits = 39; 178 mmu->base.pgt_bits = 32 - 12; 179 mmu->base.spg_shift = 12; 180 mmu->base.lpg_shift = 12; 181 mmu->base.map_sg = nv44_vm_map_sg; 182 mmu->base.unmap = nv44_vm_unmap; 183 mmu->base.flush = nv44_vm_flush; 184 185 mmu->nullp = pci_alloc_consistent(device->pdev, 16 * 1024, &mmu->null); 186 if (!mmu->nullp) { 187 nv_warn(mmu, "unable to allocate dummy pages\n"); 188 mmu->null = 0; 189 } 190 191 ret = nvkm_vm_create(&mmu->base, 0, NV44_GART_SIZE, 0, 4096, 192 &mmu->vm); 193 if (ret) 194 return ret; 195 196 ret = nvkm_gpuobj_new(nv_object(mmu), NULL, 197 (NV44_GART_SIZE / NV44_GART_PAGE) * 4, 198 512 * 1024, NVOBJ_FLAG_ZERO_ALLOC, 199 &mmu->vm->pgt[0].obj[0]); 200 mmu->vm->pgt[0].refcount[0] = 1; 201 if (ret) 202 return ret; 203 204 return 0; 205 } 206 207 static int 208 nv44_mmu_init(struct nvkm_object *object) 209 { 210 struct nv04_mmu *mmu = (void *)object; 211 struct nvkm_gpuobj *gart = mmu->vm->pgt[0].obj[0]; 212 u32 addr; 213 int ret; 214 215 ret = nvkm_mmu_init(&mmu->base); 216 if (ret) 217 return ret; 218 219 /* calculate vram address of this PRAMIN block, object must be 220 * allocated on 512KiB alignment, and not exceed a total size 221 * of 512KiB for this to work correctly 222 */ 223 addr = nv_rd32(mmu, 0x10020c); 224 addr -= ((gart->addr >> 19) + 1) << 19; 225 226 nv_wr32(mmu, 0x100850, 0x80000000); 227 nv_wr32(mmu, 0x100818, mmu->null); 228 nv_wr32(mmu, 0x100804, NV44_GART_SIZE); 229 nv_wr32(mmu, 0x100850, 0x00008000); 230 nv_mask(mmu, 0x10008c, 0x00000200, 0x00000200); 231 nv_wr32(mmu, 0x100820, 0x00000000); 232 nv_wr32(mmu, 0x10082c, 0x00000001); 233 nv_wr32(mmu, 0x100800, addr | 0x00000010); 234 return 0; 235 } 236 237 struct nvkm_oclass 238 nv44_mmu_oclass = { 239 .handle = NV_SUBDEV(MMU, 0x44), 240 .ofuncs = &(struct nvkm_ofuncs) { 241 .ctor = nv44_mmu_ctor, 242 .dtor = nv04_mmu_dtor, 243 .init = nv44_mmu_init, 244 .fini = _nvkm_mmu_fini, 245 }, 246 }; 247