linux/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/base.c
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   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 <subdev/bar.h>
  27
  28/******************************************************************************
  29 * instmem object base implementation
  30 *****************************************************************************/
  31static void
  32nvkm_instobj_load(struct nvkm_instobj *iobj)
  33{
  34        struct nvkm_memory *memory = &iobj->memory;
  35        const u64 size = nvkm_memory_size(memory);
  36        void __iomem *map;
  37        int i;
  38
  39        if (!(map = nvkm_kmap(memory))) {
  40                for (i = 0; i < size; i += 4)
  41                        nvkm_wo32(memory, i, iobj->suspend[i / 4]);
  42        } else {
  43                memcpy_toio(map, iobj->suspend, size);
  44        }
  45        nvkm_done(memory);
  46
  47        kvfree(iobj->suspend);
  48        iobj->suspend = NULL;
  49}
  50
  51static int
  52nvkm_instobj_save(struct nvkm_instobj *iobj)
  53{
  54        struct nvkm_memory *memory = &iobj->memory;
  55        const u64 size = nvkm_memory_size(memory);
  56        void __iomem *map;
  57        int i;
  58
  59        iobj->suspend = kvmalloc(size, GFP_KERNEL);
  60        if (!iobj->suspend)
  61                return -ENOMEM;
  62
  63        if (!(map = nvkm_kmap(memory))) {
  64                for (i = 0; i < size; i += 4)
  65                        iobj->suspend[i / 4] = nvkm_ro32(memory, i);
  66        } else {
  67                memcpy_fromio(iobj->suspend, map, size);
  68        }
  69        nvkm_done(memory);
  70        return 0;
  71}
  72
  73void
  74nvkm_instobj_dtor(struct nvkm_instmem *imem, struct nvkm_instobj *iobj)
  75{
  76        spin_lock(&imem->lock);
  77        list_del(&iobj->head);
  78        spin_unlock(&imem->lock);
  79}
  80
  81void
  82nvkm_instobj_ctor(const struct nvkm_memory_func *func,
  83                  struct nvkm_instmem *imem, struct nvkm_instobj *iobj)
  84{
  85        nvkm_memory_ctor(func, &iobj->memory);
  86        iobj->suspend = NULL;
  87        spin_lock(&imem->lock);
  88        list_add_tail(&iobj->head, &imem->list);
  89        spin_unlock(&imem->lock);
  90}
  91
  92int
  93nvkm_instobj_new(struct nvkm_instmem *imem, u32 size, u32 align, bool zero,
  94                 struct nvkm_memory **pmemory)
  95{
  96        struct nvkm_subdev *subdev = &imem->subdev;
  97        struct nvkm_memory *memory = NULL;
  98        u32 offset;
  99        int ret;
 100
 101        ret = imem->func->memory_new(imem, size, align, zero, &memory);
 102        if (ret) {
 103                nvkm_error(subdev, "OOM: %08x %08x %d\n", size, align, ret);
 104                goto done;
 105        }
 106
 107        nvkm_trace(subdev, "new %08x %08x %d: %010llx %010llx\n", size, align,
 108                   zero, nvkm_memory_addr(memory), nvkm_memory_size(memory));
 109
 110        if (!imem->func->zero && zero) {
 111                void __iomem *map = nvkm_kmap(memory);
 112                if (unlikely(!map)) {
 113                        for (offset = 0; offset < size; offset += 4)
 114                                nvkm_wo32(memory, offset, 0x00000000);
 115                } else {
 116                        memset_io(map, 0x00, size);
 117                }
 118                nvkm_done(memory);
 119        }
 120
 121done:
 122        if (ret)
 123                nvkm_memory_unref(&memory);
 124        *pmemory = memory;
 125        return ret;
 126}
 127
 128/******************************************************************************
 129 * instmem subdev base implementation
 130 *****************************************************************************/
 131
 132u32
 133nvkm_instmem_rd32(struct nvkm_instmem *imem, u32 addr)
 134{
 135        return imem->func->rd32(imem, addr);
 136}
 137
 138void
 139nvkm_instmem_wr32(struct nvkm_instmem *imem, u32 addr, u32 data)
 140{
 141        return imem->func->wr32(imem, addr, data);
 142}
 143
 144void
 145nvkm_instmem_boot(struct nvkm_instmem *imem)
 146{
 147        /* Separate bootstrapped objects from normal list, as we need
 148         * to make sure they're accessed with the slowpath on suspend
 149         * and resume.
 150         */
 151        struct nvkm_instobj *iobj, *itmp;
 152        spin_lock(&imem->lock);
 153        list_for_each_entry_safe(iobj, itmp, &imem->list, head) {
 154                list_move_tail(&iobj->head, &imem->boot);
 155        }
 156        spin_unlock(&imem->lock);
 157}
 158
 159static int
 160nvkm_instmem_fini(struct nvkm_subdev *subdev, bool suspend)
 161{
 162        struct nvkm_instmem *imem = nvkm_instmem(subdev);
 163        struct nvkm_instobj *iobj;
 164
 165        if (suspend) {
 166                list_for_each_entry(iobj, &imem->list, head) {
 167                        int ret = nvkm_instobj_save(iobj);
 168                        if (ret)
 169                                return ret;
 170                }
 171
 172                nvkm_bar_bar2_fini(subdev->device);
 173
 174                list_for_each_entry(iobj, &imem->boot, head) {
 175                        int ret = nvkm_instobj_save(iobj);
 176                        if (ret)
 177                                return ret;
 178                }
 179        }
 180
 181        if (imem->func->fini)
 182                imem->func->fini(imem);
 183
 184        return 0;
 185}
 186
 187static int
 188nvkm_instmem_init(struct nvkm_subdev *subdev)
 189{
 190        struct nvkm_instmem *imem = nvkm_instmem(subdev);
 191        struct nvkm_instobj *iobj;
 192
 193        list_for_each_entry(iobj, &imem->boot, head) {
 194                if (iobj->suspend)
 195                        nvkm_instobj_load(iobj);
 196        }
 197
 198        nvkm_bar_bar2_init(subdev->device);
 199
 200        list_for_each_entry(iobj, &imem->list, head) {
 201                if (iobj->suspend)
 202                        nvkm_instobj_load(iobj);
 203        }
 204
 205        return 0;
 206}
 207
 208static int
 209nvkm_instmem_oneinit(struct nvkm_subdev *subdev)
 210{
 211        struct nvkm_instmem *imem = nvkm_instmem(subdev);
 212        if (imem->func->oneinit)
 213                return imem->func->oneinit(imem);
 214        return 0;
 215}
 216
 217static void *
 218nvkm_instmem_dtor(struct nvkm_subdev *subdev)
 219{
 220        struct nvkm_instmem *imem = nvkm_instmem(subdev);
 221        void *data = imem;
 222        if (imem->func->dtor)
 223                data = imem->func->dtor(imem);
 224        mutex_destroy(&imem->mutex);
 225        return data;
 226}
 227
 228static const struct nvkm_subdev_func
 229nvkm_instmem = {
 230        .dtor = nvkm_instmem_dtor,
 231        .oneinit = nvkm_instmem_oneinit,
 232        .init = nvkm_instmem_init,
 233        .fini = nvkm_instmem_fini,
 234};
 235
 236void
 237nvkm_instmem_ctor(const struct nvkm_instmem_func *func, struct nvkm_device *device,
 238                  enum nvkm_subdev_type type, int inst, struct nvkm_instmem *imem)
 239{
 240        nvkm_subdev_ctor(&nvkm_instmem, device, type, inst, &imem->subdev);
 241        imem->func = func;
 242        spin_lock_init(&imem->lock);
 243        INIT_LIST_HEAD(&imem->list);
 244        INIT_LIST_HEAD(&imem->boot);
 245        mutex_init(&imem->mutex);
 246}
 247