kernel/drivers/gpu/drm/nouveau/nvkm/engine/xtensa.c

   1 /*
   2  * Copyright 2013 Ilia Mirkin
   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/xtensa.h>
  23
  24 #include <core/gpuobj.h>
  25 #include <engine/fifo.h>
  26
  27 static int
  28 nvkm_xtensa_oclass_get(struct nvkm_oclass *oclass, int index)
  29 {
  30         struct nvkm_xtensa *xtensa = nvkm_xtensa(oclass->engine);
  31         int c = 0;
  32
  33         while (xtensa->func->sclass[c].oclass) {
  34                 if (c++ == index) {
  35                         oclass->base = xtensa->func->sclass[index];
  36                         return index;
  37                 }
  38         }
  39
  40         return c;
  41 }
  42
  43 static int
  44 nvkm_xtensa_cclass_bind(struct nvkm_object *object, struct nvkm_gpuobj *parent,
  45                         int align, struct nvkm_gpuobj **pgpuobj)
  46 {
  47         return nvkm_gpuobj_new(object->engine->subdev.device, 0x10000, align,
  48                                true, parent, pgpuobj);
  49 }
  50
  51 static const struct nvkm_object_func
  52 nvkm_xtensa_cclass = {
  53         .bind = nvkm_xtensa_cclass_bind,
  54 };
  55
  56 static void
  57 nvkm_xtensa_intr(struct nvkm_engine *engine)
  58 {
  59         struct nvkm_xtensa *xtensa = nvkm_xtensa(engine);
  60         struct nvkm_subdev *subdev = &xtensa->engine.subdev;
  61         struct nvkm_device *device = subdev->device;
  62         const u32 base = xtensa->addr;
  63         u32 unk104 = nvkm_rd32(device, base + 0xd04);
  64         u32 intr = nvkm_rd32(device, base + 0xc20);
  65         u32 chan = nvkm_rd32(device, base + 0xc28);
  66         u32 unk10c = nvkm_rd32(device, base + 0xd0c);
  67
  68         if (intr & 0x10)
  69                 nvkm_warn(subdev, "Watchdog interrupt, engine hung.\n");
  70         nvkm_wr32(device, base + 0xc20, intr);
  71         intr = nvkm_rd32(device, base + 0xc20);
  72         if (unk104 == 0x10001 && unk10c == 0x200 && chan && !intr) {
  73                 nvkm_debug(subdev, "Enabling FIFO_CTRL\n");
  74                 nvkm_mask(device, xtensa->addr + 0xd94, 0, xtensa->func->fifo_val);
  75         }
  76 }
  77
  78 static int
  79 nvkm_xtensa_fini(struct nvkm_engine *engine, bool suspend)
  80 {
  81         struct nvkm_xtensa *xtensa = nvkm_xtensa(engine);
  82         struct nvkm_device *device = xtensa->engine.subdev.device;
  83         const u32 base = xtensa->addr;
  84
  85         nvkm_wr32(device, base + 0xd84, 0); /* INTR_EN */
  86         nvkm_wr32(device, base + 0xd94, 0); /* FIFO_CTRL */
  87
  88         if (!suspend)
  89                 nvkm_memory_del(&xtensa->gpu_fw);
  90         return 0;
  91 }
  92
  93 static int
  94 nvkm_xtensa_init(struct nvkm_engine *engine)
  95 {
  96         struct nvkm_xtensa *xtensa = nvkm_xtensa(engine);
  97         struct nvkm_subdev *subdev = &xtensa->engine.subdev;
  98         struct nvkm_device *device = subdev->device;
  99         const u32 base = xtensa->addr;
 100         const struct firmware *fw;
 101         char name[32];
 102         int i, ret;
 103         u64 addr, size;
 104         u32 tmp;
 105
 106         if (!xtensa->gpu_fw) {
 107                 snprintf(name, sizeof(name), "nouveau/nv84_xuc%03x",
 108                          xtensa->addr >> 12);
 109
 110                 ret = request_firmware(&fw, name, device->dev);
 111                 if (ret) {
 112                         nvkm_warn(subdev, "unable to load firmware %s\n", name);
 113                         return ret;
 114                 }
 115
 116                 if (fw->size > 0x40000) {
 117                         nvkm_warn(subdev, "firmware %s too large\n", name);
 118                         release_firmware(fw);
 119                         return -EINVAL;
 120                 }
 121
 122                 ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
 123                                       0x40000, 0x1000, false,
 124                                       &xtensa->gpu_fw);
 125                 if (ret) {
 126                         release_firmware(fw);
 127                         return ret;
 128                 }
 129
 130                 nvkm_kmap(xtensa->gpu_fw);
 131                 for (i = 0; i < fw->size / 4; i++)
 132                         nvkm_wo32(xtensa->gpu_fw, i * 4, *((u32 *)fw->data + i));
 133                 nvkm_done(xtensa->gpu_fw);
 134                 release_firmware(fw);
 135         }
 136
 137         addr = nvkm_memory_addr(xtensa->gpu_fw);
 138         size = nvkm_memory_size(xtensa->gpu_fw);
 139
 140         nvkm_wr32(device, base + 0xd10, 0x1fffffff); /* ?? */
 141         nvkm_wr32(device, base + 0xd08, 0x0fffffff); /* ?? */
 142
 143         nvkm_wr32(device, base + 0xd28, xtensa->func->unkd28); /* ?? */
 144         nvkm_wr32(device, base + 0xc20, 0x3f); /* INTR */
 145         nvkm_wr32(device, base + 0xd84, 0x3f); /* INTR_EN */
 146
 147         nvkm_wr32(device, base + 0xcc0, addr >> 8); /* XT_REGION_BASE */
 148         nvkm_wr32(device, base + 0xcc4, 0x1c); /* XT_REGION_SETUP */
 149         nvkm_wr32(device, base + 0xcc8, size >> 8); /* XT_REGION_LIMIT */
 150
 151         tmp = nvkm_rd32(device, 0x0);
 152         nvkm_wr32(device, base + 0xde0, tmp); /* SCRATCH_H2X */
 153
 154         nvkm_wr32(device, base + 0xce8, 0xf); /* XT_REGION_SETUP */
 155
 156         nvkm_wr32(device, base + 0xc20, 0x3f); /* INTR */
 157         nvkm_wr32(device, base + 0xd84, 0x3f); /* INTR_EN */
 158         return 0;
 159 }
 160
 161 static void *
 162 nvkm_xtensa_dtor(struct nvkm_engine *engine)
 163 {
 164         return nvkm_xtensa(engine);
 165 }
 166
 167 static const struct nvkm_engine_func
 168 nvkm_xtensa = {
 169         .dtor = nvkm_xtensa_dtor,
 170         .init = nvkm_xtensa_init,
 171         .fini = nvkm_xtensa_fini,
 172         .intr = nvkm_xtensa_intr,
 173         .fifo.sclass = nvkm_xtensa_oclass_get,
 174         .cclass = &nvkm_xtensa_cclass,
 175 };
 176
 177 int
 178 nvkm_xtensa_new_(const struct nvkm_xtensa_func *func,
 179                  struct nvkm_device *device, int index, bool enable,
 180                  u32 addr, struct nvkm_engine **pengine)
 181 {
 182         struct nvkm_xtensa *xtensa;
 183
 184         if (!(xtensa = kzalloc(sizeof(*xtensa), GFP_KERNEL)))
 185                 return -ENOMEM;
 186         xtensa->func = func;
 187         xtensa->addr = addr;
 188         *pengine = &xtensa->engine;
 189
 190         return nvkm_engine_ctor(&nvkm_xtensa, device, index, func->pmc_enable,
 191                                 enable, &xtensa->engine);
 192 }