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 "umem.h" 23 #include "ummu.h" 24 25 #include <core/client.h> 26 #include <core/memory.h> 27 #include <subdev/bar.h> 28 29 #include <nvif/class.h> 30 #include <nvif/if000a.h> 31 #include <nvif/unpack.h> 32 33 static const struct nvkm_object_func nvkm_umem; 34 struct nvkm_memory * 35 nvkm_umem_search(struct nvkm_client *client, u64 handle) 36 { 37 struct nvkm_client *master = client->object.client; 38 struct nvkm_memory *memory = NULL; 39 struct nvkm_object *object; 40 struct nvkm_umem *umem; 41 42 object = nvkm_object_search(client, handle, &nvkm_umem); 43 if (IS_ERR(object)) { 44 if (client != master) { 45 spin_lock(&master->lock); 46 list_for_each_entry(umem, &master->umem, head) { 47 if (umem->object.object == handle) { 48 memory = nvkm_memory_ref(umem->memory); 49 break; 50 } 51 } 52 spin_unlock(&master->lock); 53 } 54 } else { 55 umem = nvkm_umem(object); 56 memory = nvkm_memory_ref(umem->memory); 57 } 58 59 return memory ? memory : ERR_PTR(-ENOENT); 60 } 61 62 static int 63 nvkm_umem_unmap(struct nvkm_object *object) 64 { 65 struct nvkm_umem *umem = nvkm_umem(object); 66 67 if (!umem->map) 68 return -EEXIST; 69 70 if (umem->io) { 71 if (!IS_ERR(umem->bar)) { 72 struct nvkm_device *device = umem->mmu->subdev.device; 73 nvkm_vmm_put(nvkm_bar_bar1_vmm(device), &umem->bar); 74 } else { 75 umem->bar = NULL; 76 } 77 } else { 78 vunmap(umem->map); 79 umem->map = NULL; 80 } 81 82 return 0; 83 } 84 85 static int 86 nvkm_umem_map(struct nvkm_object *object, void *argv, u32 argc, 87 enum nvkm_object_map *type, u64 *handle, u64 *length) 88 { 89 struct nvkm_umem *umem = nvkm_umem(object); 90 struct nvkm_mmu *mmu = umem->mmu; 91 92 if (!umem->mappable) 93 return -EINVAL; 94 if (umem->map) 95 return -EEXIST; 96 97 if ((umem->type & NVKM_MEM_HOST) && !argc) { 98 int ret = nvkm_mem_map_host(umem->memory, &umem->map); 99 if (ret) 100 return ret; 101 102 *handle = (unsigned long)(void *)umem->map; 103 *length = nvkm_memory_size(umem->memory); 104 *type = NVKM_OBJECT_MAP_VA; 105 return 0; 106 } else 107 if ((umem->type & NVKM_MEM_VRAM) || 108 (umem->type & NVKM_MEM_KIND)) { 109 int ret = mmu->func->mem.umap(mmu, umem->memory, argv, argc, 110 handle, length, &umem->bar); 111 if (ret) 112 return ret; 113 114 *type = NVKM_OBJECT_MAP_IO; 115 } else { 116 return -EINVAL; 117 } 118 119 umem->io = (*type == NVKM_OBJECT_MAP_IO); 120 return 0; 121 } 122 123 static void * 124 nvkm_umem_dtor(struct nvkm_object *object) 125 { 126 struct nvkm_umem *umem = nvkm_umem(object); 127 spin_lock(&umem->object.client->lock); 128 list_del_init(&umem->head); 129 spin_unlock(&umem->object.client->lock); 130 nvkm_memory_unref(&umem->memory); 131 return umem; 132 } 133 134 static const struct nvkm_object_func 135 nvkm_umem = { 136 .dtor = nvkm_umem_dtor, 137 .map = nvkm_umem_map, 138 .unmap = nvkm_umem_unmap, 139 }; 140 141 int 142 nvkm_umem_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, 143 struct nvkm_object **pobject) 144 { 145 struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu; 146 union { 147 struct nvif_mem_v0 v0; 148 } *args = argv; 149 struct nvkm_umem *umem; 150 int type, ret = -ENOSYS; 151 u8 page; 152 u64 size; 153 154 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) { 155 type = args->v0.type; 156 page = args->v0.page; 157 size = args->v0.size; 158 } else 159 return ret; 160 161 if (type >= mmu->type_nr) 162 return -EINVAL; 163 164 if (!(umem = kzalloc(sizeof(*umem), GFP_KERNEL))) 165 return -ENOMEM; 166 nvkm_object_ctor(&nvkm_umem, oclass, &umem->object); 167 umem->mmu = mmu; 168 umem->type = mmu->type[type].type; 169 INIT_LIST_HEAD(&umem->head); 170 *pobject = &umem->object; 171 172 if (mmu->type[type].type & NVKM_MEM_MAPPABLE) { 173 page = max_t(u8, page, PAGE_SHIFT); 174 umem->mappable = true; 175 } 176 177 ret = nvkm_mem_new_type(mmu, type, page, size, argv, argc, 178 &umem->memory); 179 if (ret) 180 return ret; 181 182 spin_lock(&umem->object.client->lock); 183 list_add(&umem->head, &umem->object.client->umem); 184 spin_unlock(&umem->object.client->lock); 185 186 args->v0.page = nvkm_memory_page(umem->memory); 187 args->v0.addr = nvkm_memory_addr(umem->memory); 188 args->v0.size = nvkm_memory_size(umem->memory); 189 return 0; 190 } 191