1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */ 3 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */ 4 5 #include <linux/clk.h> 6 #include <linux/reset.h> 7 #include <linux/platform_device.h> 8 #include <linux/pm_domain.h> 9 #include <linux/regulator/consumer.h> 10 11 #include "panfrost_device.h" 12 #include "panfrost_devfreq.h" 13 #include "panfrost_features.h" 14 #include "panfrost_gpu.h" 15 #include "panfrost_job.h" 16 #include "panfrost_mmu.h" 17 #include "panfrost_perfcnt.h" 18 19 static int panfrost_reset_init(struct panfrost_device *pfdev) 20 { 21 int err; 22 23 pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true); 24 if (IS_ERR(pfdev->rstc)) { 25 dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc)); 26 return PTR_ERR(pfdev->rstc); 27 } 28 29 err = reset_control_deassert(pfdev->rstc); 30 if (err) 31 return err; 32 33 return 0; 34 } 35 36 static void panfrost_reset_fini(struct panfrost_device *pfdev) 37 { 38 reset_control_assert(pfdev->rstc); 39 } 40 41 static int panfrost_clk_init(struct panfrost_device *pfdev) 42 { 43 int err; 44 unsigned long rate; 45 46 pfdev->clock = devm_clk_get(pfdev->dev, NULL); 47 if (IS_ERR(pfdev->clock)) { 48 dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock)); 49 return PTR_ERR(pfdev->clock); 50 } 51 52 rate = clk_get_rate(pfdev->clock); 53 dev_info(pfdev->dev, "clock rate = %lu\n", rate); 54 55 err = clk_prepare_enable(pfdev->clock); 56 if (err) 57 return err; 58 59 pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus"); 60 if (IS_ERR(pfdev->bus_clock)) { 61 dev_err(pfdev->dev, "get bus_clock failed %ld\n", 62 PTR_ERR(pfdev->bus_clock)); 63 return PTR_ERR(pfdev->bus_clock); 64 } 65 66 if (pfdev->bus_clock) { 67 rate = clk_get_rate(pfdev->bus_clock); 68 dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate); 69 70 err = clk_prepare_enable(pfdev->bus_clock); 71 if (err) 72 goto disable_clock; 73 } 74 75 return 0; 76 77 disable_clock: 78 clk_disable_unprepare(pfdev->clock); 79 80 return err; 81 } 82 83 static void panfrost_clk_fini(struct panfrost_device *pfdev) 84 { 85 clk_disable_unprepare(pfdev->bus_clock); 86 clk_disable_unprepare(pfdev->clock); 87 } 88 89 static int panfrost_regulator_init(struct panfrost_device *pfdev) 90 { 91 int ret, i; 92 93 if (WARN(pfdev->comp->num_supplies > ARRAY_SIZE(pfdev->regulators), 94 "Too many supplies in compatible structure.\n")) 95 return -EINVAL; 96 97 for (i = 0; i < pfdev->comp->num_supplies; i++) 98 pfdev->regulators[i].supply = pfdev->comp->supply_names[i]; 99 100 ret = devm_regulator_bulk_get(pfdev->dev, 101 pfdev->comp->num_supplies, 102 pfdev->regulators); 103 if (ret < 0) { 104 if (ret != -EPROBE_DEFER) 105 dev_err(pfdev->dev, "failed to get regulators: %d\n", 106 ret); 107 return ret; 108 } 109 110 ret = regulator_bulk_enable(pfdev->comp->num_supplies, 111 pfdev->regulators); 112 if (ret < 0) { 113 dev_err(pfdev->dev, "failed to enable regulators: %d\n", ret); 114 return ret; 115 } 116 117 return 0; 118 } 119 120 static void panfrost_regulator_fini(struct panfrost_device *pfdev) 121 { 122 regulator_bulk_disable(pfdev->comp->num_supplies, 123 pfdev->regulators); 124 } 125 126 static void panfrost_pm_domain_fini(struct panfrost_device *pfdev) 127 { 128 int i; 129 130 for (i = 0; i < ARRAY_SIZE(pfdev->pm_domain_devs); i++) { 131 if (!pfdev->pm_domain_devs[i]) 132 break; 133 134 if (pfdev->pm_domain_links[i]) 135 device_link_del(pfdev->pm_domain_links[i]); 136 137 dev_pm_domain_detach(pfdev->pm_domain_devs[i], true); 138 } 139 } 140 141 static int panfrost_pm_domain_init(struct panfrost_device *pfdev) 142 { 143 int err; 144 int i, num_domains; 145 146 num_domains = of_count_phandle_with_args(pfdev->dev->of_node, 147 "power-domains", 148 "#power-domain-cells"); 149 150 /* 151 * Single domain is handled by the core, and, if only a single power 152 * the power domain is requested, the property is optional. 153 */ 154 if (num_domains < 2 && pfdev->comp->num_pm_domains < 2) 155 return 0; 156 157 if (num_domains != pfdev->comp->num_pm_domains) { 158 dev_err(pfdev->dev, 159 "Incorrect number of power domains: %d provided, %d needed\n", 160 num_domains, pfdev->comp->num_pm_domains); 161 return -EINVAL; 162 } 163 164 if (WARN(num_domains > ARRAY_SIZE(pfdev->pm_domain_devs), 165 "Too many supplies in compatible structure.\n")) 166 return -EINVAL; 167 168 for (i = 0; i < num_domains; i++) { 169 pfdev->pm_domain_devs[i] = 170 dev_pm_domain_attach_by_name(pfdev->dev, 171 pfdev->comp->pm_domain_names[i]); 172 if (IS_ERR_OR_NULL(pfdev->pm_domain_devs[i])) { 173 err = PTR_ERR(pfdev->pm_domain_devs[i]) ? : -ENODATA; 174 pfdev->pm_domain_devs[i] = NULL; 175 dev_err(pfdev->dev, 176 "failed to get pm-domain %s(%d): %d\n", 177 pfdev->comp->pm_domain_names[i], i, err); 178 goto err; 179 } 180 181 pfdev->pm_domain_links[i] = device_link_add(pfdev->dev, 182 pfdev->pm_domain_devs[i], DL_FLAG_PM_RUNTIME | 183 DL_FLAG_STATELESS | DL_FLAG_RPM_ACTIVE); 184 if (!pfdev->pm_domain_links[i]) { 185 dev_err(pfdev->pm_domain_devs[i], 186 "adding device link failed!\n"); 187 err = -ENODEV; 188 goto err; 189 } 190 } 191 192 return 0; 193 194 err: 195 panfrost_pm_domain_fini(pfdev); 196 return err; 197 } 198 199 int panfrost_device_init(struct panfrost_device *pfdev) 200 { 201 int err; 202 struct resource *res; 203 204 mutex_init(&pfdev->sched_lock); 205 mutex_init(&pfdev->reset_lock); 206 INIT_LIST_HEAD(&pfdev->scheduled_jobs); 207 INIT_LIST_HEAD(&pfdev->as_lru_list); 208 209 spin_lock_init(&pfdev->as_lock); 210 211 err = panfrost_clk_init(pfdev); 212 if (err) { 213 dev_err(pfdev->dev, "clk init failed %d\n", err); 214 return err; 215 } 216 217 err = panfrost_regulator_init(pfdev); 218 if (err) 219 goto err_out0; 220 221 err = panfrost_reset_init(pfdev); 222 if (err) { 223 dev_err(pfdev->dev, "reset init failed %d\n", err); 224 goto err_out1; 225 } 226 227 err = panfrost_pm_domain_init(pfdev); 228 if (err) 229 goto err_out2; 230 231 res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0); 232 pfdev->iomem = devm_ioremap_resource(pfdev->dev, res); 233 if (IS_ERR(pfdev->iomem)) { 234 dev_err(pfdev->dev, "failed to ioremap iomem\n"); 235 err = PTR_ERR(pfdev->iomem); 236 goto err_out3; 237 } 238 239 err = panfrost_gpu_init(pfdev); 240 if (err) 241 goto err_out3; 242 243 err = panfrost_mmu_init(pfdev); 244 if (err) 245 goto err_out4; 246 247 err = panfrost_job_init(pfdev); 248 if (err) 249 goto err_out5; 250 251 err = panfrost_perfcnt_init(pfdev); 252 if (err) 253 goto err_out6; 254 255 return 0; 256 err_out6: 257 panfrost_job_fini(pfdev); 258 err_out5: 259 panfrost_mmu_fini(pfdev); 260 err_out4: 261 panfrost_gpu_fini(pfdev); 262 err_out3: 263 panfrost_pm_domain_fini(pfdev); 264 err_out2: 265 panfrost_reset_fini(pfdev); 266 err_out1: 267 panfrost_regulator_fini(pfdev); 268 err_out0: 269 panfrost_clk_fini(pfdev); 270 return err; 271 } 272 273 void panfrost_device_fini(struct panfrost_device *pfdev) 274 { 275 panfrost_perfcnt_fini(pfdev); 276 panfrost_job_fini(pfdev); 277 panfrost_mmu_fini(pfdev); 278 panfrost_gpu_fini(pfdev); 279 panfrost_pm_domain_fini(pfdev); 280 panfrost_reset_fini(pfdev); 281 panfrost_regulator_fini(pfdev); 282 panfrost_clk_fini(pfdev); 283 } 284 285 const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code) 286 { 287 switch (exception_code) { 288 /* Non-Fault Status code */ 289 case 0x00: return "NOT_STARTED/IDLE/OK"; 290 case 0x01: return "DONE"; 291 case 0x02: return "INTERRUPTED"; 292 case 0x03: return "STOPPED"; 293 case 0x04: return "TERMINATED"; 294 case 0x08: return "ACTIVE"; 295 /* Job exceptions */ 296 case 0x40: return "JOB_CONFIG_FAULT"; 297 case 0x41: return "JOB_POWER_FAULT"; 298 case 0x42: return "JOB_READ_FAULT"; 299 case 0x43: return "JOB_WRITE_FAULT"; 300 case 0x44: return "JOB_AFFINITY_FAULT"; 301 case 0x48: return "JOB_BUS_FAULT"; 302 case 0x50: return "INSTR_INVALID_PC"; 303 case 0x51: return "INSTR_INVALID_ENC"; 304 case 0x52: return "INSTR_TYPE_MISMATCH"; 305 case 0x53: return "INSTR_OPERAND_FAULT"; 306 case 0x54: return "INSTR_TLS_FAULT"; 307 case 0x55: return "INSTR_BARRIER_FAULT"; 308 case 0x56: return "INSTR_ALIGN_FAULT"; 309 case 0x58: return "DATA_INVALID_FAULT"; 310 case 0x59: return "TILE_RANGE_FAULT"; 311 case 0x5A: return "ADDR_RANGE_FAULT"; 312 case 0x60: return "OUT_OF_MEMORY"; 313 /* GPU exceptions */ 314 case 0x80: return "DELAYED_BUS_FAULT"; 315 case 0x88: return "SHAREABILITY_FAULT"; 316 /* MMU exceptions */ 317 case 0xC1: return "TRANSLATION_FAULT_LEVEL1"; 318 case 0xC2: return "TRANSLATION_FAULT_LEVEL2"; 319 case 0xC3: return "TRANSLATION_FAULT_LEVEL3"; 320 case 0xC4: return "TRANSLATION_FAULT_LEVEL4"; 321 case 0xC8: return "PERMISSION_FAULT"; 322 case 0xC9 ... 0xCF: return "PERMISSION_FAULT"; 323 case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1"; 324 case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2"; 325 case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3"; 326 case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4"; 327 case 0xD8: return "ACCESS_FLAG"; 328 case 0xD9 ... 0xDF: return "ACCESS_FLAG"; 329 case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT"; 330 case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT"; 331 } 332 333 return "UNKNOWN"; 334 } 335 336 void panfrost_device_reset(struct panfrost_device *pfdev) 337 { 338 panfrost_gpu_soft_reset(pfdev); 339 340 panfrost_gpu_power_on(pfdev); 341 panfrost_mmu_reset(pfdev); 342 panfrost_job_enable_interrupts(pfdev); 343 } 344 345 #ifdef CONFIG_PM 346 int panfrost_device_resume(struct device *dev) 347 { 348 struct platform_device *pdev = to_platform_device(dev); 349 struct panfrost_device *pfdev = platform_get_drvdata(pdev); 350 351 panfrost_device_reset(pfdev); 352 panfrost_devfreq_resume(pfdev); 353 354 return 0; 355 } 356 357 int panfrost_device_suspend(struct device *dev) 358 { 359 struct platform_device *pdev = to_platform_device(dev); 360 struct panfrost_device *pfdev = platform_get_drvdata(pdev); 361 362 if (!panfrost_job_is_idle(pfdev)) 363 return -EBUSY; 364 365 panfrost_devfreq_suspend(pfdev); 366 panfrost_gpu_power_off(pfdev); 367 368 return 0; 369 } 370 #endif 371