kernel/drivers/gpu/drm/nouveau/nvkm/engine/falcon.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 #include <engine/falcon.h>
  23
  24 #include <core/device.h>
  25 #include <subdev/timer.h>
  26
  27 void
  28 nvkm_falcon_intr(struct nvkm_subdev *subdev)
  29 {
  30         struct nvkm_falcon *falcon = (void *)subdev;
  31         u32 dispatch = nv_ro32(falcon, 0x01c);
  32         u32 intr = nv_ro32(falcon, 0x008) & dispatch & ~(dispatch >> 16);
  33
  34         if (intr & 0x00000010) {
  35                 nv_debug(falcon, "ucode halted\n");
  36                 nv_wo32(falcon, 0x004, 0x00000010);
  37                 intr &= ~0x00000010;
  38         }
  39
  40         if (intr)  {
  41                 nv_error(falcon, "unhandled intr 0x%08x\n", intr);
  42                 nv_wo32(falcon, 0x004, intr);
  43         }
  44 }
  45
  46 u32
  47 _nvkm_falcon_rd32(struct nvkm_object *object, u64 addr)
  48 {
  49         struct nvkm_falcon *falcon = (void *)object;
  50         return nv_rd32(falcon, falcon->addr + addr);
  51 }
  52
  53 void
  54 _nvkm_falcon_wr32(struct nvkm_object *object, u64 addr, u32 data)
  55 {
  56         struct nvkm_falcon *falcon = (void *)object;
  57         nv_wr32(falcon, falcon->addr + addr, data);
  58 }
  59
  60 static void *
  61 vmemdup(const void *src, size_t len)
  62 {
  63         void *p = vmalloc(len);
  64
  65         if (p)
  66                 memcpy(p, src, len);
  67         return p;
  68 }
  69
  70 int
  71 _nvkm_falcon_init(struct nvkm_object *object)
  72 {
  73         struct nvkm_device *device = nv_device(object);
  74         struct nvkm_falcon *falcon = (void *)object;
  75         const struct firmware *fw;
  76         char name[32] = "internal";
  77         int ret, i;
  78         u32 caps;
  79
  80         /* enable engine, and determine its capabilities */
  81         ret = nvkm_engine_init(&falcon->base);
  82         if (ret)
  83                 return ret;
  84
  85         if (device->chipset <  0xa3 ||
  86             device->chipset == 0xaa || device->chipset == 0xac) {
  87                 falcon->version = 0;
  88                 falcon->secret  = (falcon->addr == 0x087000) ? 1 : 0;
  89         } else {
  90                 caps = nv_ro32(falcon, 0x12c);
  91                 falcon->version = (caps & 0x0000000f);
  92                 falcon->secret  = (caps & 0x00000030) >> 4;
  93         }
  94
  95         caps = nv_ro32(falcon, 0x108);
  96         falcon->code.limit = (caps & 0x000001ff) << 8;
  97         falcon->data.limit = (caps & 0x0003fe00) >> 1;
  98
  99         nv_debug(falcon, "falcon version: %d\n", falcon->version);
 100         nv_debug(falcon, "secret level: %d\n", falcon->secret);
 101         nv_debug(falcon, "code limit: %d\n", falcon->code.limit);
 102         nv_debug(falcon, "data limit: %d\n", falcon->data.limit);
 103
 104         /* wait for 'uc halted' to be signalled before continuing */
 105         if (falcon->secret && falcon->version < 4) {
 106                 if (!falcon->version)
 107                         nv_wait(falcon, 0x008, 0x00000010, 0x00000010);
 108                 else
 109                         nv_wait(falcon, 0x180, 0x80000000, 0);
 110                 nv_wo32(falcon, 0x004, 0x00000010);
 111         }
 112
 113         /* disable all interrupts */
 114         nv_wo32(falcon, 0x014, 0xffffffff);
 115
 116         /* no default ucode provided by the engine implementation, try and
 117          * locate a "self-bootstrapping" firmware image for the engine
 118          */
 119         if (!falcon->code.data) {
 120                 snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03x",
 121                          device->chipset, falcon->addr >> 12);
 122
 123                 ret = request_firmware(&fw, name, nv_device_base(device));
 124                 if (ret == 0) {
 125                         falcon->code.data = vmemdup(fw->data, fw->size);
 126                         falcon->code.size = fw->size;
 127                         falcon->data.data = NULL;
 128                         falcon->data.size = 0;
 129                         release_firmware(fw);
 130                 }
 131
 132                 falcon->external = true;
 133         }
 134
 135         /* next step is to try and load "static code/data segment" firmware
 136          * images for the engine
 137          */
 138         if (!falcon->code.data) {
 139                 snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03xd",
 140                          device->chipset, falcon->addr >> 12);
 141
 142                 ret = request_firmware(&fw, name, nv_device_base(device));
 143                 if (ret) {
 144                         nv_error(falcon, "unable to load firmware data\n");
 145                         return ret;
 146                 }
 147
 148                 falcon->data.data = vmemdup(fw->data, fw->size);
 149                 falcon->data.size = fw->size;
 150                 release_firmware(fw);
 151                 if (!falcon->data.data)
 152                         return -ENOMEM;
 153
 154                 snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03xc",
 155                          device->chipset, falcon->addr >> 12);
 156
 157                 ret = request_firmware(&fw, name, nv_device_base(device));
 158                 if (ret) {
 159                         nv_error(falcon, "unable to load firmware code\n");
 160                         return ret;
 161                 }
 162
 163                 falcon->code.data = vmemdup(fw->data, fw->size);
 164                 falcon->code.size = fw->size;
 165                 release_firmware(fw);
 166                 if (!falcon->code.data)
 167                         return -ENOMEM;
 168         }
 169
 170         nv_debug(falcon, "firmware: %s (%s)\n", name, falcon->data.data ?
 171                  "static code/data segments" : "self-bootstrapping");
 172
 173         /* ensure any "self-bootstrapping" firmware image is in vram */
 174         if (!falcon->data.data && !falcon->core) {
 175                 ret = nvkm_gpuobj_new(object->parent, NULL, falcon->code.size,
 176                                       256, 0, &falcon->core);
 177                 if (ret) {
 178                         nv_error(falcon, "core allocation failed, %d\n", ret);
 179                         return ret;
 180                 }
 181
 182                 for (i = 0; i < falcon->code.size; i += 4)
 183                         nv_wo32(falcon->core, i, falcon->code.data[i / 4]);
 184         }
 185
 186         /* upload firmware bootloader (or the full code segments) */
 187         if (falcon->core) {
 188                 if (device->card_type < NV_C0)
 189                         nv_wo32(falcon, 0x618, 0x04000000);
 190                 else
 191                         nv_wo32(falcon, 0x618, 0x00000114);
 192                 nv_wo32(falcon, 0x11c, 0);
 193                 nv_wo32(falcon, 0x110, falcon->core->addr >> 8);
 194                 nv_wo32(falcon, 0x114, 0);
 195                 nv_wo32(falcon, 0x118, 0x00006610);
 196         } else {
 197                 if (falcon->code.size > falcon->code.limit ||
 198                     falcon->data.size > falcon->data.limit) {
 199                         nv_error(falcon, "ucode exceeds falcon limit(s)\n");
 200                         return -EINVAL;
 201                 }
 202
 203                 if (falcon->version < 3) {
 204                         nv_wo32(falcon, 0xff8, 0x00100000);
 205                         for (i = 0; i < falcon->code.size / 4; i++)
 206                                 nv_wo32(falcon, 0xff4, falcon->code.data[i]);
 207                 } else {
 208                         nv_wo32(falcon, 0x180, 0x01000000);
 209                         for (i = 0; i < falcon->code.size / 4; i++) {
 210                                 if ((i & 0x3f) == 0)
 211                                         nv_wo32(falcon, 0x188, i >> 6);
 212                                 nv_wo32(falcon, 0x184, falcon->code.data[i]);
 213                         }
 214                 }
 215         }
 216
 217         /* upload data segment (if necessary), zeroing the remainder */
 218         if (falcon->version < 3) {
 219                 nv_wo32(falcon, 0xff8, 0x00000000);
 220                 for (i = 0; !falcon->core && i < falcon->data.size / 4; i++)
 221                         nv_wo32(falcon, 0xff4, falcon->data.data[i]);
 222                 for (; i < falcon->data.limit; i += 4)
 223                         nv_wo32(falcon, 0xff4, 0x00000000);
 224         } else {
 225                 nv_wo32(falcon, 0x1c0, 0x01000000);
 226                 for (i = 0; !falcon->core && i < falcon->data.size / 4; i++)
 227                         nv_wo32(falcon, 0x1c4, falcon->data.data[i]);
 228                 for (; i < falcon->data.limit / 4; i++)
 229                         nv_wo32(falcon, 0x1c4, 0x00000000);
 230         }
 231
 232         /* start it running */
 233         nv_wo32(falcon, 0x10c, 0x00000001); /* BLOCK_ON_FIFO */
 234         nv_wo32(falcon, 0x104, 0x00000000); /* ENTRY */
 235         nv_wo32(falcon, 0x100, 0x00000002); /* TRIGGER */
 236         nv_wo32(falcon, 0x048, 0x00000003); /* FIFO | CHSW */
 237         return 0;
 238 }
 239
 240 int
 241 _nvkm_falcon_fini(struct nvkm_object *object, bool suspend)
 242 {
 243         struct nvkm_falcon *falcon = (void *)object;
 244
 245         if (!suspend) {
 246                 nvkm_gpuobj_ref(NULL, &falcon->core);
 247                 if (falcon->external) {
 248                         vfree(falcon->data.data);
 249                         vfree(falcon->code.data);
 250                         falcon->code.data = NULL;
 251                 }
 252         }
 253
 254         nv_mo32(falcon, 0x048, 0x00000003, 0x00000000);
 255         nv_wo32(falcon, 0x014, 0xffffffff);
 256
 257         return nvkm_engine_fini(&falcon->base, suspend);
 258 }
 259
 260 int
 261 nvkm_falcon_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 262                     struct nvkm_oclass *oclass, u32 addr, bool enable,
 263                     const char *iname, const char *fname,
 264                     int length, void **pobject)
 265 {
 266         struct nvkm_falcon *falcon;
 267         int ret;
 268
 269         ret = nvkm_engine_create_(parent, engine, oclass, enable, iname,
 270                                   fname, length, pobject);
 271         falcon = *pobject;
 272         if (ret)
 273                 return ret;
 274
 275         falcon->addr = addr;
 276         return 0;
 277 }