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 #include <subdev/top.h> 26 27 void 28 nvkm_falcon_load_imem(struct nvkm_falcon *falcon, void *data, u32 start, 29 u32 size, u16 tag, u8 port, bool secure) 30 { 31 if (secure && !falcon->secret) { 32 nvkm_warn(falcon->user, 33 "writing with secure tag on a non-secure falcon!\n"); 34 return; 35 } 36 37 falcon->func->load_imem(falcon, data, start, size, tag, port, 38 secure); 39 } 40 41 void 42 nvkm_falcon_load_dmem(struct nvkm_falcon *falcon, void *data, u32 start, 43 u32 size, u8 port) 44 { 45 mutex_lock(&falcon->dmem_mutex); 46 47 falcon->func->load_dmem(falcon, data, start, size, port); 48 49 mutex_unlock(&falcon->dmem_mutex); 50 } 51 52 void 53 nvkm_falcon_read_dmem(struct nvkm_falcon *falcon, u32 start, u32 size, u8 port, 54 void *data) 55 { 56 mutex_lock(&falcon->dmem_mutex); 57 58 falcon->func->read_dmem(falcon, start, size, port, data); 59 60 mutex_unlock(&falcon->dmem_mutex); 61 } 62 63 void 64 nvkm_falcon_bind_context(struct nvkm_falcon *falcon, struct nvkm_memory *inst) 65 { 66 if (!falcon->func->bind_context) { 67 nvkm_error(falcon->user, 68 "Context binding not supported on this falcon!\n"); 69 return; 70 } 71 72 falcon->func->bind_context(falcon, inst); 73 } 74 75 void 76 nvkm_falcon_set_start_addr(struct nvkm_falcon *falcon, u32 start_addr) 77 { 78 falcon->func->set_start_addr(falcon, start_addr); 79 } 80 81 void 82 nvkm_falcon_start(struct nvkm_falcon *falcon) 83 { 84 falcon->func->start(falcon); 85 } 86 87 int 88 nvkm_falcon_enable(struct nvkm_falcon *falcon) 89 { 90 struct nvkm_device *device = falcon->owner->device; 91 int ret; 92 93 nvkm_mc_enable(device, falcon->owner->type, falcon->owner->inst); 94 ret = falcon->func->enable(falcon); 95 if (ret) { 96 nvkm_mc_disable(device, falcon->owner->type, falcon->owner->inst); 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; 107 108 /* already disabled, return or wait_idle will timeout */ 109 if (!nvkm_mc_enabled(device, falcon->owner->type, falcon->owner->inst)) 110 return; 111 112 falcon->func->disable(falcon); 113 114 nvkm_mc_disable(device, falcon->owner->type, falcon->owner->inst); 115 } 116 117 int 118 nvkm_falcon_reset(struct nvkm_falcon *falcon) 119 { 120 nvkm_falcon_disable(falcon); 121 return nvkm_falcon_enable(falcon); 122 } 123 124 int 125 nvkm_falcon_wait_for_halt(struct nvkm_falcon *falcon, u32 ms) 126 { 127 return falcon->func->wait_for_halt(falcon, ms); 128 } 129 130 int 131 nvkm_falcon_clear_interrupt(struct nvkm_falcon *falcon, u32 mask) 132 { 133 return falcon->func->clear_interrupt(falcon, mask); 134 } 135 136 static int 137 nvkm_falcon_oneinit(struct nvkm_falcon *falcon) 138 { 139 const struct nvkm_falcon_func *func = falcon->func; 140 const struct nvkm_subdev *subdev = falcon->owner; 141 u32 reg; 142 143 if (!falcon->addr) { 144 falcon->addr = nvkm_top_addr(subdev->device, subdev->type, subdev->inst); 145 if (WARN_ON(!falcon->addr)) 146 return -ENODEV; 147 } 148 149 reg = nvkm_falcon_rd32(falcon, 0x12c); 150 falcon->version = reg & 0xf; 151 falcon->secret = (reg >> 4) & 0x3; 152 falcon->code.ports = (reg >> 8) & 0xf; 153 falcon->data.ports = (reg >> 12) & 0xf; 154 155 reg = nvkm_falcon_rd32(falcon, 0x108); 156 falcon->code.limit = (reg & 0x1ff) << 8; 157 falcon->data.limit = (reg & 0x3fe00) >> 1; 158 159 if (func->debug) { 160 u32 val = nvkm_falcon_rd32(falcon, func->debug); 161 falcon->debug = (val >> 20) & 0x1; 162 } 163 164 return 0; 165 } 166 167 void 168 nvkm_falcon_put(struct nvkm_falcon *falcon, const struct nvkm_subdev *user) 169 { 170 if (unlikely(!falcon)) 171 return; 172 173 mutex_lock(&falcon->mutex); 174 if (falcon->user == user) { 175 nvkm_debug(falcon->user, "released %s falcon\n", falcon->name); 176 falcon->user = NULL; 177 } 178 mutex_unlock(&falcon->mutex); 179 } 180 181 int 182 nvkm_falcon_get(struct nvkm_falcon *falcon, const struct nvkm_subdev *user) 183 { 184 int ret = 0; 185 186 mutex_lock(&falcon->mutex); 187 if (falcon->user) { 188 nvkm_error(user, "%s falcon already acquired by %s!\n", 189 falcon->name, falcon->user->name); 190 mutex_unlock(&falcon->mutex); 191 return -EBUSY; 192 } 193 194 nvkm_debug(user, "acquired %s falcon\n", falcon->name); 195 if (!falcon->oneinit) 196 ret = nvkm_falcon_oneinit(falcon); 197 falcon->user = user; 198 mutex_unlock(&falcon->mutex); 199 return ret; 200 } 201 202 void 203 nvkm_falcon_dtor(struct nvkm_falcon *falcon) 204 { 205 } 206 207 int 208 nvkm_falcon_ctor(const struct nvkm_falcon_func *func, 209 struct nvkm_subdev *subdev, const char *name, u32 addr, 210 struct nvkm_falcon *falcon) 211 { 212 falcon->func = func; 213 falcon->owner = subdev; 214 falcon->name = name; 215 falcon->addr = addr; 216 mutex_init(&falcon->mutex); 217 mutex_init(&falcon->dmem_mutex); 218 return 0; 219 } 220 221 void 222 nvkm_falcon_del(struct nvkm_falcon **pfalcon) 223 { 224 if (*pfalcon) { 225 nvkm_falcon_dtor(*pfalcon); 226 kfree(*pfalcon); 227 *pfalcon = NULL; 228 } 229 } 230