drivers/gpu/drm/nouveau/nvkm/falcon/base.c

   1 /*
   2  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
   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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22 #include "priv.h"
  23
  24 #include <subdev/mc.h>
  25
  26 void
  27 nvkm_falcon_load_imem(struct nvkm_falcon *falcon, void *data, u32 start,
  28                       u32 size, u16 tag, u8 port, bool secure)
  29 {
  30         if (secure && !falcon->secret) {
  31                 nvkm_warn(falcon->user,
  32                           "writing with secure tag on a non-secure falcon!\n");
  33                 return;
  34         }
  35
  36         falcon->func->load_imem(falcon, data, start, size, tag, port,
  37                                 secure);
  38 }
  39
  40 void
  41 nvkm_falcon_load_dmem(struct nvkm_falcon *falcon, void *data, u32 start,
  42                       u32 size, u8 port)
  43 {
  44         mutex_lock(&falcon->dmem_mutex);
  45
  46         falcon->func->load_dmem(falcon, data, start, size, port);
  47
  48         mutex_unlock(&falcon->dmem_mutex);
  49 }
  50
  51 void
  52 nvkm_falcon_read_dmem(struct nvkm_falcon *falcon, u32 start, u32 size, u8 port,
  53                       void *data)
  54 {
  55         mutex_lock(&falcon->dmem_mutex);
  56
  57         falcon->func->read_dmem(falcon, start, size, port, data);
  58
  59         mutex_unlock(&falcon->dmem_mutex);
  60 }
  61
  62 void
  63 nvkm_falcon_bind_context(struct nvkm_falcon *falcon, struct nvkm_gpuobj *inst)
  64 {
  65         if (!falcon->func->bind_context) {
  66                 nvkm_error(falcon->user,
  67                            "Context binding not supported on this falcon!\n");
  68                 return;
  69         }
  70
  71         falcon->func->bind_context(falcon, inst);
  72 }
  73
  74 void
  75 nvkm_falcon_set_start_addr(struct nvkm_falcon *falcon, u32 start_addr)
  76 {
  77         falcon->func->set_start_addr(falcon, start_addr);
  78 }
  79
  80 void
  81 nvkm_falcon_start(struct nvkm_falcon *falcon)
  82 {
  83         falcon->func->start(falcon);
  84 }
  85
  86 int
  87 nvkm_falcon_enable(struct nvkm_falcon *falcon)
  88 {
  89         struct nvkm_device *device = falcon->owner->device;
  90         enum nvkm_devidx id = falcon->owner->index;
  91         int ret;
  92
  93         nvkm_mc_enable(device, id);
  94         ret = falcon->func->enable(falcon);
  95         if (ret) {
  96                 nvkm_mc_disable(device, id);
  97                 return ret;
  98         }
  99
 100         return 0;
 101 }
 102
 103 void
 104 nvkm_falcon_disable(struct nvkm_falcon *falcon)
 105 {
 106         struct nvkm_device *device = falcon->owner->device;
 107         enum nvkm_devidx id = falcon->owner->index;
 108
 109         /* already disabled, return or wait_idle will timeout */
 110         if (!nvkm_mc_enabled(device, id))
 111                 return;
 112
 113         falcon->func->disable(falcon);
 114
 115         nvkm_mc_disable(device, id);
 116 }
 117
 118 int
 119 nvkm_falcon_reset(struct nvkm_falcon *falcon)
 120 {
 121         nvkm_falcon_disable(falcon);
 122         return nvkm_falcon_enable(falcon);
 123 }
 124
 125 int
 126 nvkm_falcon_wait_for_halt(struct nvkm_falcon *falcon, u32 ms)
 127 {
 128         return falcon->func->wait_for_halt(falcon, ms);
 129 }
 130
 131 int
 132 nvkm_falcon_clear_interrupt(struct nvkm_falcon *falcon, u32 mask)
 133 {
 134         return falcon->func->clear_interrupt(falcon, mask);
 135 }
 136
 137 void
 138 nvkm_falcon_put(struct nvkm_falcon *falcon, const struct nvkm_subdev *user)
 139 {
 140         if (unlikely(!falcon))
 141                 return;
 142
 143         mutex_lock(&falcon->mutex);
 144         if (falcon->user == user) {
 145                 nvkm_debug(falcon->user, "released %s falcon\n", falcon->name);
 146                 falcon->user = NULL;
 147         }
 148         mutex_unlock(&falcon->mutex);
 149 }
 150
 151 int
 152 nvkm_falcon_get(struct nvkm_falcon *falcon, const struct nvkm_subdev *user)
 153 {
 154         mutex_lock(&falcon->mutex);
 155         if (falcon->user) {
 156                 nvkm_error(user, "%s falcon already acquired by %s!\n",
 157                            falcon->name, nvkm_subdev_name[falcon->user->index]);
 158                 mutex_unlock(&falcon->mutex);
 159                 return -EBUSY;
 160         }
 161
 162         nvkm_debug(user, "acquired %s falcon\n", falcon->name);
 163         falcon->user = user;
 164         mutex_unlock(&falcon->mutex);
 165         return 0;
 166 }
 167
 168 void
 169 nvkm_falcon_ctor(const struct nvkm_falcon_func *func,
 170                  struct nvkm_subdev *subdev, const char *name, u32 addr,
 171                  struct nvkm_falcon *falcon)
 172 {
 173         u32 debug_reg;
 174         u32 reg;
 175
 176         falcon->func = func;
 177         falcon->owner = subdev;
 178         falcon->name = name;
 179         falcon->addr = addr;
 180         mutex_init(&falcon->mutex);
 181         mutex_init(&falcon->dmem_mutex);
 182
 183         reg = nvkm_falcon_rd32(falcon, 0x12c);
 184         falcon->version = reg & 0xf;
 185         falcon->secret = (reg >> 4) & 0x3;
 186         falcon->code.ports = (reg >> 8) & 0xf;
 187         falcon->data.ports = (reg >> 12) & 0xf;
 188
 189         reg = nvkm_falcon_rd32(falcon, 0x108);
 190         falcon->code.limit = (reg & 0x1ff) << 8;
 191         falcon->data.limit = (reg & 0x3fe00) >> 1;
 192
 193         switch (subdev->index) {
 194         case NVKM_ENGINE_GR:
 195                 debug_reg = 0x0;
 196                 break;
 197         case NVKM_SUBDEV_PMU:
 198                 debug_reg = 0xc08;
 199                 break;
 200         case NVKM_ENGINE_NVDEC:
 201                 debug_reg = 0xd00;
 202                 break;
 203         case NVKM_ENGINE_SEC2:
 204                 debug_reg = 0x408;
 205                 falcon->has_emem = true;
 206                 break;
 207         default:
 208                 nvkm_warn(subdev, "unsupported falcon %s!\n",
 209                           nvkm_subdev_name[subdev->index]);
 210                 debug_reg = 0;
 211                 break;
 212         }
 213
 214         if (debug_reg) {
 215                 u32 val = nvkm_falcon_rd32(falcon, debug_reg);
 216                 falcon->debug = (val >> 20) & 0x1;
 217         }
 218 }
 219
 220 void
 221 nvkm_falcon_del(struct nvkm_falcon **pfalcon)
 222 {
 223         if (*pfalcon) {
 224                 kfree(*pfalcon);
 225                 *pfalcon = NULL;
 226         }
 227 }