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 <nvif/vmm.h> 23 #include <nvif/mem.h> 24 25 #include <nvif/if000c.h> 26 27 int 28 nvif_vmm_unmap(struct nvif_vmm *vmm, u64 addr) 29 { 30 return nvif_object_mthd(&vmm->object, NVIF_VMM_V0_UNMAP, 31 &(struct nvif_vmm_unmap_v0) { .addr = addr }, 32 sizeof(struct nvif_vmm_unmap_v0)); 33 } 34 35 int 36 nvif_vmm_map(struct nvif_vmm *vmm, u64 addr, u64 size, void *argv, u32 argc, 37 struct nvif_mem *mem, u64 offset) 38 { 39 struct nvif_vmm_map_v0 *args; 40 u8 stack[48]; 41 int ret; 42 43 if (sizeof(*args) + argc > sizeof(stack)) { 44 if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL))) 45 return -ENOMEM; 46 } else { 47 args = (void *)stack; 48 } 49 50 args->version = 0; 51 args->addr = addr; 52 args->size = size; 53 args->memory = nvif_handle(&mem->object); 54 args->offset = offset; 55 memcpy(args->data, argv, argc); 56 57 ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_MAP, 58 args, sizeof(*args) + argc); 59 if (args != (void *)stack) 60 kfree(args); 61 return ret; 62 } 63 64 void 65 nvif_vmm_put(struct nvif_vmm *vmm, struct nvif_vma *vma) 66 { 67 if (vma->size) { 68 WARN_ON(nvif_object_mthd(&vmm->object, NVIF_VMM_V0_PUT, 69 &(struct nvif_vmm_put_v0) { 70 .addr = vma->addr, 71 }, sizeof(struct nvif_vmm_put_v0))); 72 vma->size = 0; 73 } 74 } 75 76 int 77 nvif_vmm_get(struct nvif_vmm *vmm, enum nvif_vmm_get type, bool sparse, 78 u8 page, u8 align, u64 size, struct nvif_vma *vma) 79 { 80 struct nvif_vmm_get_v0 args; 81 int ret; 82 83 args.version = vma->size = 0; 84 args.sparse = sparse; 85 args.page = page; 86 args.align = align; 87 args.size = size; 88 89 switch (type) { 90 case ADDR: args.type = NVIF_VMM_GET_V0_ADDR; break; 91 case PTES: args.type = NVIF_VMM_GET_V0_PTES; break; 92 case LAZY: args.type = NVIF_VMM_GET_V0_LAZY; break; 93 default: 94 WARN_ON(1); 95 return -EINVAL; 96 } 97 98 ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_GET, 99 &args, sizeof(args)); 100 if (ret == 0) { 101 vma->addr = args.addr; 102 vma->size = args.size; 103 } 104 return ret; 105 } 106 107 void 108 nvif_vmm_dtor(struct nvif_vmm *vmm) 109 { 110 kfree(vmm->page); 111 nvif_object_dtor(&vmm->object); 112 } 113 114 int 115 nvif_vmm_ctor(struct nvif_mmu *mmu, const char *name, s32 oclass, bool managed, 116 u64 addr, u64 size, void *argv, u32 argc, struct nvif_vmm *vmm) 117 { 118 struct nvif_vmm_v0 *args; 119 u32 argn = sizeof(*args) + argc; 120 int ret = -ENOSYS, i; 121 122 vmm->object.client = NULL; 123 vmm->page = NULL; 124 125 if (!(args = kmalloc(argn, GFP_KERNEL))) 126 return -ENOMEM; 127 args->version = 0; 128 args->managed = managed; 129 args->addr = addr; 130 args->size = size; 131 memcpy(args->data, argv, argc); 132 133 ret = nvif_object_ctor(&mmu->object, name ? name : "nvifVmm", 0, 134 oclass, args, argn, &vmm->object); 135 if (ret) 136 goto done; 137 138 vmm->start = args->addr; 139 vmm->limit = args->size; 140 141 vmm->page_nr = args->page_nr; 142 vmm->page = kmalloc_array(vmm->page_nr, sizeof(*vmm->page), 143 GFP_KERNEL); 144 if (!vmm->page) { 145 ret = -ENOMEM; 146 goto done; 147 } 148 149 for (i = 0; i < vmm->page_nr; i++) { 150 struct nvif_vmm_page_v0 args = { .index = i }; 151 152 ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_PAGE, 153 &args, sizeof(args)); 154 if (ret) 155 break; 156 157 vmm->page[i].shift = args.shift; 158 vmm->page[i].sparse = args.sparse; 159 vmm->page[i].vram = args.vram; 160 vmm->page[i].host = args.host; 161 vmm->page[i].comp = args.comp; 162 } 163 164 done: 165 if (ret) 166 nvif_vmm_dtor(vmm); 167 kfree(args); 168 return ret; 169 } 170