drivers/gpu/drm/nouveau/nvkm/subdev/instmem/base.c

   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 "priv.h"
  25
  26 #include <core/memory.h>
  27 #include <subdev/bar.h>
  28
  29 /******************************************************************************
  30  * instmem object base implementation
  31  *****************************************************************************/
  32 #define nvkm_instobj(p) container_of((p), struct nvkm_instobj, memory)
  33
  34 struct nvkm_instobj {
  35         struct nvkm_memory memory;
  36         struct nvkm_memory *parent;
  37         struct nvkm_instmem *imem;
  38         struct list_head head;
  39         u32 *suspend;
  40         void __iomem *map;
  41 };
  42
  43 static enum nvkm_memory_target
  44 nvkm_instobj_target(struct nvkm_memory *memory)
  45 {
  46         memory = nvkm_instobj(memory)->parent;
  47         return nvkm_memory_target(memory);
  48 }
  49
  50 static u64
  51 nvkm_instobj_addr(struct nvkm_memory *memory)
  52 {
  53         memory = nvkm_instobj(memory)->parent;
  54         return nvkm_memory_addr(memory);
  55 }
  56
  57 static u64
  58 nvkm_instobj_size(struct nvkm_memory *memory)
  59 {
  60         memory = nvkm_instobj(memory)->parent;
  61         return nvkm_memory_size(memory);
  62 }
  63
  64 static void
  65 nvkm_instobj_release(struct nvkm_memory *memory)
  66 {
  67         struct nvkm_instobj *iobj = nvkm_instobj(memory);
  68         nvkm_bar_flush(iobj->imem->subdev.device->bar);
  69 }
  70
  71 static void __iomem *
  72 nvkm_instobj_acquire(struct nvkm_memory *memory)
  73 {
  74         return nvkm_instobj(memory)->map;
  75 }
  76
  77 static u32
  78 nvkm_instobj_rd32(struct nvkm_memory *memory, u64 offset)
  79 {
  80         return ioread32_native(nvkm_instobj(memory)->map + offset);
  81 }
  82
  83 static void
  84 nvkm_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
  85 {
  86         iowrite32_native(data, nvkm_instobj(memory)->map + offset);
  87 }
  88
  89 static void
  90 nvkm_instobj_map(struct nvkm_memory *memory, struct nvkm_vma *vma, u64 offset)
  91 {
  92         memory = nvkm_instobj(memory)->parent;
  93         nvkm_memory_map(memory, vma, offset);
  94 }
  95
  96 static void *
  97 nvkm_instobj_dtor(struct nvkm_memory *memory)
  98 {
  99         struct nvkm_instobj *iobj = nvkm_instobj(memory);
 100         list_del(&iobj->head);
 101         nvkm_memory_del(&iobj->parent);
 102         return iobj;
 103 }
 104
 105 const struct nvkm_memory_func
 106 nvkm_instobj_func = {
 107         .dtor = nvkm_instobj_dtor,
 108         .target = nvkm_instobj_target,
 109         .addr = nvkm_instobj_addr,
 110         .size = nvkm_instobj_size,
 111         .acquire = nvkm_instobj_acquire,
 112         .release = nvkm_instobj_release,
 113         .rd32 = nvkm_instobj_rd32,
 114         .wr32 = nvkm_instobj_wr32,
 115         .map = nvkm_instobj_map,
 116 };
 117
 118 static void
 119 nvkm_instobj_boot(struct nvkm_memory *memory, struct nvkm_vm *vm)
 120 {
 121         memory = nvkm_instobj(memory)->parent;
 122         nvkm_memory_boot(memory, vm);
 123 }
 124
 125 static void
 126 nvkm_instobj_release_slow(struct nvkm_memory *memory)
 127 {
 128         struct nvkm_instobj *iobj = nvkm_instobj(memory);
 129         nvkm_instobj_release(memory);
 130         nvkm_done(iobj->parent);
 131 }
 132
 133 static void __iomem *
 134 nvkm_instobj_acquire_slow(struct nvkm_memory *memory)
 135 {
 136         struct nvkm_instobj *iobj = nvkm_instobj(memory);
 137         iobj->map = nvkm_kmap(iobj->parent);
 138         if (iobj->map)
 139                 memory->func = &nvkm_instobj_func;
 140         return iobj->map;
 141 }
 142
 143 static u32
 144 nvkm_instobj_rd32_slow(struct nvkm_memory *memory, u64 offset)
 145 {
 146         struct nvkm_instobj *iobj = nvkm_instobj(memory);
 147         return nvkm_ro32(iobj->parent, offset);
 148 }
 149
 150 static void
 151 nvkm_instobj_wr32_slow(struct nvkm_memory *memory, u64 offset, u32 data)
 152 {
 153         struct nvkm_instobj *iobj = nvkm_instobj(memory);
 154         return nvkm_wo32(iobj->parent, offset, data);
 155 }
 156
 157 const struct nvkm_memory_func
 158 nvkm_instobj_func_slow = {
 159         .dtor = nvkm_instobj_dtor,
 160         .target = nvkm_instobj_target,
 161         .addr = nvkm_instobj_addr,
 162         .size = nvkm_instobj_size,
 163         .boot = nvkm_instobj_boot,
 164         .acquire = nvkm_instobj_acquire_slow,
 165         .release = nvkm_instobj_release_slow,
 166         .rd32 = nvkm_instobj_rd32_slow,
 167         .wr32 = nvkm_instobj_wr32_slow,
 168         .map = nvkm_instobj_map,
 169 };
 170
 171 int
 172 nvkm_instobj_new(struct nvkm_instmem *imem, u32 size, u32 align, bool zero,
 173                  struct nvkm_memory **pmemory)
 174 {
 175         struct nvkm_memory *memory = NULL;
 176         struct nvkm_instobj *iobj;
 177         u32 offset;
 178         int ret;
 179
 180         ret = imem->func->memory_new(imem, size, align, zero, &memory);
 181         if (ret)
 182                 goto done;
 183
 184         if (!imem->func->persistent) {
 185                 if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL))) {
 186                         ret = -ENOMEM;
 187                         goto done;
 188                 }
 189
 190                 nvkm_memory_ctor(&nvkm_instobj_func_slow, &iobj->memory);
 191                 iobj->parent = memory;
 192                 iobj->imem = imem;
 193                 list_add_tail(&iobj->head, &imem->list);
 194                 memory = &iobj->memory;
 195         }
 196
 197         if (!imem->func->zero && zero) {
 198                 void __iomem *map = nvkm_kmap(memory);
 199                 if (unlikely(!map)) {
 200                         for (offset = 0; offset < size; offset += 4)
 201                                 nvkm_wo32(memory, offset, 0x00000000);
 202                 } else {
 203                         memset_io(map, 0x00, size);
 204                 }
 205                 nvkm_done(memory);
 206         }
 207
 208 done:
 209         if (ret)
 210                 nvkm_memory_del(&memory);
 211         *pmemory = memory;
 212         return ret;
 213 }
 214
 215 /******************************************************************************
 216  * instmem subdev base implementation
 217  *****************************************************************************/
 218
 219 u32
 220 nvkm_instmem_rd32(struct nvkm_instmem *imem, u32 addr)
 221 {
 222         return imem->func->rd32(imem, addr);
 223 }
 224
 225 void
 226 nvkm_instmem_wr32(struct nvkm_instmem *imem, u32 addr, u32 data)
 227 {
 228         return imem->func->wr32(imem, addr, data);
 229 }
 230
 231 static int
 232 nvkm_instmem_fini(struct nvkm_subdev *subdev, bool suspend)
 233 {
 234         struct nvkm_instmem *imem = nvkm_instmem(subdev);
 235         struct nvkm_instobj *iobj;
 236         int i;
 237
 238         if (imem->func->fini)
 239                 imem->func->fini(imem);
 240
 241         if (suspend) {
 242                 list_for_each_entry(iobj, &imem->list, head) {
 243                         struct nvkm_memory *memory = iobj->parent;
 244                         u64 size = nvkm_memory_size(memory);
 245
 246                         iobj->suspend = vmalloc(size);
 247                         if (!iobj->suspend)
 248                                 return -ENOMEM;
 249
 250                         for (i = 0; i < size; i += 4)
 251                                 iobj->suspend[i / 4] = nvkm_ro32(memory, i);
 252                 }
 253         }
 254
 255         return 0;
 256 }
 257
 258 static int
 259 nvkm_instmem_oneinit(struct nvkm_subdev *subdev)
 260 {
 261         struct nvkm_instmem *imem = nvkm_instmem(subdev);
 262         if (imem->func->oneinit)
 263                 return imem->func->oneinit(imem);
 264         return 0;
 265 }
 266
 267 static int
 268 nvkm_instmem_init(struct nvkm_subdev *subdev)
 269 {
 270         struct nvkm_instmem *imem = nvkm_instmem(subdev);
 271         struct nvkm_instobj *iobj;
 272         int i;
 273
 274         list_for_each_entry(iobj, &imem->list, head) {
 275                 if (iobj->suspend) {
 276                         struct nvkm_memory *memory = iobj->parent;
 277                         u64 size = nvkm_memory_size(memory);
 278                         for (i = 0; i < size; i += 4)
 279                                 nvkm_wo32(memory, i, iobj->suspend[i / 4]);
 280                         vfree(iobj->suspend);
 281                         iobj->suspend = NULL;
 282                 }
 283         }
 284
 285         return 0;
 286 }
 287
 288 static void *
 289 nvkm_instmem_dtor(struct nvkm_subdev *subdev)
 290 {
 291         struct nvkm_instmem *imem = nvkm_instmem(subdev);
 292         if (imem->func->dtor)
 293                 return imem->func->dtor(imem);
 294         return imem;
 295 }
 296
 297 static const struct nvkm_subdev_func
 298 nvkm_instmem = {
 299         .dtor = nvkm_instmem_dtor,
 300         .oneinit = nvkm_instmem_oneinit,
 301         .init = nvkm_instmem_init,
 302         .fini = nvkm_instmem_fini,
 303 };
 304
 305 void
 306 nvkm_instmem_ctor(const struct nvkm_instmem_func *func,
 307                   struct nvkm_device *device, int index,
 308                   struct nvkm_instmem *imem)
 309 {
 310         nvkm_subdev_ctor(&nvkm_instmem, device, index, 0, &imem->subdev);
 311         imem->func = func;
 312         INIT_LIST_HEAD(&imem->list);
 313 }