1 /* 2 * Copyright © 2017 Intel Corporation 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 (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 */ 24 25 #ifndef __INTEL_UNCORE_H__ 26 #define __INTEL_UNCORE_H__ 27 28 #include <linux/spinlock.h> 29 #include <linux/notifier.h> 30 #include <linux/hrtimer.h> 31 #include <linux/io-64-nonatomic-lo-hi.h> 32 #include <linux/types.h> 33 34 #include "i915_reg_defs.h" 35 36 struct drm_device; 37 struct drm_i915_private; 38 struct intel_runtime_pm; 39 struct intel_uncore; 40 struct intel_gt; 41 42 struct intel_uncore_mmio_debug { 43 spinlock_t lock; /** lock is also taken in irq contexts. */ 44 int unclaimed_mmio_check; 45 int saved_mmio_check; 46 u32 suspend_count; 47 }; 48 49 enum forcewake_domain_id { 50 FW_DOMAIN_ID_RENDER = 0, 51 FW_DOMAIN_ID_GT, /* also includes blitter engine */ 52 FW_DOMAIN_ID_MEDIA, 53 FW_DOMAIN_ID_MEDIA_VDBOX0, 54 FW_DOMAIN_ID_MEDIA_VDBOX1, 55 FW_DOMAIN_ID_MEDIA_VDBOX2, 56 FW_DOMAIN_ID_MEDIA_VDBOX3, 57 FW_DOMAIN_ID_MEDIA_VDBOX4, 58 FW_DOMAIN_ID_MEDIA_VDBOX5, 59 FW_DOMAIN_ID_MEDIA_VDBOX6, 60 FW_DOMAIN_ID_MEDIA_VDBOX7, 61 FW_DOMAIN_ID_MEDIA_VEBOX0, 62 FW_DOMAIN_ID_MEDIA_VEBOX1, 63 FW_DOMAIN_ID_MEDIA_VEBOX2, 64 FW_DOMAIN_ID_MEDIA_VEBOX3, 65 FW_DOMAIN_ID_GSC, 66 67 FW_DOMAIN_ID_COUNT 68 }; 69 70 enum forcewake_domains { 71 FORCEWAKE_RENDER = BIT(FW_DOMAIN_ID_RENDER), 72 FORCEWAKE_GT = BIT(FW_DOMAIN_ID_GT), 73 FORCEWAKE_MEDIA = BIT(FW_DOMAIN_ID_MEDIA), 74 FORCEWAKE_MEDIA_VDBOX0 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX0), 75 FORCEWAKE_MEDIA_VDBOX1 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX1), 76 FORCEWAKE_MEDIA_VDBOX2 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX2), 77 FORCEWAKE_MEDIA_VDBOX3 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX3), 78 FORCEWAKE_MEDIA_VDBOX4 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX4), 79 FORCEWAKE_MEDIA_VDBOX5 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX5), 80 FORCEWAKE_MEDIA_VDBOX6 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX6), 81 FORCEWAKE_MEDIA_VDBOX7 = BIT(FW_DOMAIN_ID_MEDIA_VDBOX7), 82 FORCEWAKE_MEDIA_VEBOX0 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX0), 83 FORCEWAKE_MEDIA_VEBOX1 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX1), 84 FORCEWAKE_MEDIA_VEBOX2 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX2), 85 FORCEWAKE_MEDIA_VEBOX3 = BIT(FW_DOMAIN_ID_MEDIA_VEBOX3), 86 FORCEWAKE_GSC = BIT(FW_DOMAIN_ID_GSC), 87 88 FORCEWAKE_ALL = BIT(FW_DOMAIN_ID_COUNT) - 1, 89 }; 90 91 struct intel_uncore_fw_get { 92 void (*force_wake_get)(struct intel_uncore *uncore, 93 enum forcewake_domains domains); 94 }; 95 96 struct intel_uncore_funcs { 97 enum forcewake_domains (*read_fw_domains)(struct intel_uncore *uncore, 98 i915_reg_t r); 99 enum forcewake_domains (*write_fw_domains)(struct intel_uncore *uncore, 100 i915_reg_t r); 101 102 u8 (*mmio_readb)(struct intel_uncore *uncore, 103 i915_reg_t r, bool trace); 104 u16 (*mmio_readw)(struct intel_uncore *uncore, 105 i915_reg_t r, bool trace); 106 u32 (*mmio_readl)(struct intel_uncore *uncore, 107 i915_reg_t r, bool trace); 108 u64 (*mmio_readq)(struct intel_uncore *uncore, 109 i915_reg_t r, bool trace); 110 111 void (*mmio_writeb)(struct intel_uncore *uncore, 112 i915_reg_t r, u8 val, bool trace); 113 void (*mmio_writew)(struct intel_uncore *uncore, 114 i915_reg_t r, u16 val, bool trace); 115 void (*mmio_writel)(struct intel_uncore *uncore, 116 i915_reg_t r, u32 val, bool trace); 117 }; 118 119 struct intel_forcewake_range { 120 u32 start; 121 u32 end; 122 123 enum forcewake_domains domains; 124 }; 125 126 /* Other register ranges (e.g., shadow tables, MCR tables, etc.) */ 127 struct i915_range { 128 u32 start; 129 u32 end; 130 }; 131 132 struct intel_uncore { 133 void __iomem *regs; 134 135 struct drm_i915_private *i915; 136 struct intel_gt *gt; 137 struct intel_runtime_pm *rpm; 138 139 spinlock_t lock; /** lock is also taken in irq contexts. */ 140 141 /* 142 * Do we need to apply an additional offset to reach the beginning 143 * of the basic non-engine GT registers (referred to as "GSI" on 144 * newer platforms, or "GT block" on older platforms)? If so, we'll 145 * track that here and apply it transparently to registers in the 146 * appropriate range to maintain compatibility with our existing 147 * register definitions and GT code. 148 */ 149 u32 gsi_offset; 150 151 unsigned int flags; 152 #define UNCORE_HAS_FORCEWAKE BIT(0) 153 #define UNCORE_HAS_FPGA_DBG_UNCLAIMED BIT(1) 154 #define UNCORE_HAS_DBG_UNCLAIMED BIT(2) 155 #define UNCORE_HAS_FIFO BIT(3) 156 #define UNCORE_NEEDS_FLR_ON_FINI BIT(4) 157 158 const struct intel_forcewake_range *fw_domains_table; 159 unsigned int fw_domains_table_entries; 160 161 /* 162 * Shadowed registers are special cases where we can safely write 163 * to the register *without* grabbing forcewake. 164 */ 165 const struct i915_range *shadowed_reg_table; 166 unsigned int shadowed_reg_table_entries; 167 168 struct notifier_block pmic_bus_access_nb; 169 const struct intel_uncore_fw_get *fw_get_funcs; 170 struct intel_uncore_funcs funcs; 171 172 unsigned int fifo_count; 173 174 enum forcewake_domains fw_domains; 175 enum forcewake_domains fw_domains_active; 176 enum forcewake_domains fw_domains_timer; 177 enum forcewake_domains fw_domains_saved; /* user domains saved for S3 */ 178 179 struct intel_uncore_forcewake_domain { 180 struct intel_uncore *uncore; 181 enum forcewake_domain_id id; 182 enum forcewake_domains mask; 183 unsigned int wake_count; 184 bool active; 185 struct hrtimer timer; 186 u32 __iomem *reg_set; 187 u32 __iomem *reg_ack; 188 } *fw_domain[FW_DOMAIN_ID_COUNT]; 189 190 unsigned int user_forcewake_count; 191 192 struct intel_uncore_mmio_debug *debug; 193 }; 194 195 /* Iterate over initialised fw domains */ 196 #define for_each_fw_domain_masked(domain__, mask__, uncore__, tmp__) \ 197 for (tmp__ = (mask__); tmp__ ;) \ 198 for_each_if(domain__ = (uncore__)->fw_domain[__mask_next_bit(tmp__)]) 199 200 #define for_each_fw_domain(domain__, uncore__, tmp__) \ 201 for_each_fw_domain_masked(domain__, (uncore__)->fw_domains, uncore__, tmp__) 202 203 static inline bool 204 intel_uncore_has_forcewake(const struct intel_uncore *uncore) 205 { 206 return uncore->flags & UNCORE_HAS_FORCEWAKE; 207 } 208 209 static inline bool 210 intel_uncore_has_fpga_dbg_unclaimed(const struct intel_uncore *uncore) 211 { 212 return uncore->flags & UNCORE_HAS_FPGA_DBG_UNCLAIMED; 213 } 214 215 static inline bool 216 intel_uncore_has_dbg_unclaimed(const struct intel_uncore *uncore) 217 { 218 return uncore->flags & UNCORE_HAS_DBG_UNCLAIMED; 219 } 220 221 static inline bool 222 intel_uncore_has_fifo(const struct intel_uncore *uncore) 223 { 224 return uncore->flags & UNCORE_HAS_FIFO; 225 } 226 227 static inline bool 228 intel_uncore_needs_flr_on_fini(const struct intel_uncore *uncore) 229 { 230 return uncore->flags & UNCORE_NEEDS_FLR_ON_FINI; 231 } 232 233 static inline bool 234 intel_uncore_set_flr_on_fini(struct intel_uncore *uncore) 235 { 236 return uncore->flags |= UNCORE_NEEDS_FLR_ON_FINI; 237 } 238 239 void intel_uncore_mmio_debug_init_early(struct drm_i915_private *i915); 240 void intel_uncore_init_early(struct intel_uncore *uncore, 241 struct intel_gt *gt); 242 int intel_uncore_setup_mmio(struct intel_uncore *uncore, phys_addr_t phys_addr); 243 int intel_uncore_init_mmio(struct intel_uncore *uncore); 244 void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore, 245 struct intel_gt *gt); 246 bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore); 247 bool intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore); 248 void intel_uncore_cleanup_mmio(struct intel_uncore *uncore); 249 void intel_uncore_fini_mmio(struct drm_device *dev, void *data); 250 void intel_uncore_suspend(struct intel_uncore *uncore); 251 void intel_uncore_resume_early(struct intel_uncore *uncore); 252 void intel_uncore_runtime_resume(struct intel_uncore *uncore); 253 254 void assert_forcewakes_inactive(struct intel_uncore *uncore); 255 void assert_forcewakes_active(struct intel_uncore *uncore, 256 enum forcewake_domains fw_domains); 257 const char *intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id); 258 259 enum forcewake_domains 260 intel_uncore_forcewake_for_reg(struct intel_uncore *uncore, 261 i915_reg_t reg, unsigned int op); 262 #define FW_REG_READ (1) 263 #define FW_REG_WRITE (2) 264 265 void intel_uncore_forcewake_get(struct intel_uncore *uncore, 266 enum forcewake_domains domains); 267 void intel_uncore_forcewake_put(struct intel_uncore *uncore, 268 enum forcewake_domains domains); 269 void intel_uncore_forcewake_put_delayed(struct intel_uncore *uncore, 270 enum forcewake_domains domains); 271 void intel_uncore_forcewake_flush(struct intel_uncore *uncore, 272 enum forcewake_domains fw_domains); 273 274 /* 275 * Like above but the caller must manage the uncore.lock itself. 276 * Must be used with intel_uncore_read_fw() and friends. 277 */ 278 void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore, 279 enum forcewake_domains domains); 280 void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore, 281 enum forcewake_domains domains); 282 283 void intel_uncore_forcewake_user_get(struct intel_uncore *uncore); 284 void intel_uncore_forcewake_user_put(struct intel_uncore *uncore); 285 286 int __intel_wait_for_register(struct intel_uncore *uncore, 287 i915_reg_t reg, 288 u32 mask, 289 u32 value, 290 unsigned int fast_timeout_us, 291 unsigned int slow_timeout_ms, 292 u32 *out_value); 293 static inline int 294 intel_wait_for_register(struct intel_uncore *uncore, 295 i915_reg_t reg, 296 u32 mask, 297 u32 value, 298 unsigned int timeout_ms) 299 { 300 return __intel_wait_for_register(uncore, reg, mask, value, 2, 301 timeout_ms, NULL); 302 } 303 304 int __intel_wait_for_register_fw(struct intel_uncore *uncore, 305 i915_reg_t reg, 306 u32 mask, 307 u32 value, 308 unsigned int fast_timeout_us, 309 unsigned int slow_timeout_ms, 310 u32 *out_value); 311 static inline int 312 intel_wait_for_register_fw(struct intel_uncore *uncore, 313 i915_reg_t reg, 314 u32 mask, 315 u32 value, 316 unsigned int timeout_ms) 317 { 318 return __intel_wait_for_register_fw(uncore, reg, mask, value, 319 2, timeout_ms, NULL); 320 } 321 322 #define IS_GSI_REG(reg) ((reg) < 0x40000) 323 324 /* register access functions */ 325 #define __raw_read(x__, s__) \ 326 static inline u##x__ __raw_uncore_read##x__(const struct intel_uncore *uncore, \ 327 i915_reg_t reg) \ 328 { \ 329 u32 offset = i915_mmio_reg_offset(reg); \ 330 if (IS_GSI_REG(offset)) \ 331 offset += uncore->gsi_offset; \ 332 return read##s__(uncore->regs + offset); \ 333 } 334 335 #define __raw_write(x__, s__) \ 336 static inline void __raw_uncore_write##x__(const struct intel_uncore *uncore, \ 337 i915_reg_t reg, u##x__ val) \ 338 { \ 339 u32 offset = i915_mmio_reg_offset(reg); \ 340 if (IS_GSI_REG(offset)) \ 341 offset += uncore->gsi_offset; \ 342 write##s__(val, uncore->regs + offset); \ 343 } 344 __raw_read(8, b) 345 __raw_read(16, w) 346 __raw_read(32, l) 347 __raw_read(64, q) 348 349 __raw_write(8, b) 350 __raw_write(16, w) 351 __raw_write(32, l) 352 __raw_write(64, q) 353 354 #undef __raw_read 355 #undef __raw_write 356 357 #define __uncore_read(name__, x__, s__, trace__) \ 358 static inline u##x__ intel_uncore_##name__(struct intel_uncore *uncore, \ 359 i915_reg_t reg) \ 360 { \ 361 return uncore->funcs.mmio_read##s__(uncore, reg, (trace__)); \ 362 } 363 364 #define __uncore_write(name__, x__, s__, trace__) \ 365 static inline void intel_uncore_##name__(struct intel_uncore *uncore, \ 366 i915_reg_t reg, u##x__ val) \ 367 { \ 368 uncore->funcs.mmio_write##s__(uncore, reg, val, (trace__)); \ 369 } 370 371 __uncore_read(read8, 8, b, true) 372 __uncore_read(read16, 16, w, true) 373 __uncore_read(read, 32, l, true) 374 __uncore_read(read16_notrace, 16, w, false) 375 __uncore_read(read_notrace, 32, l, false) 376 377 __uncore_write(write8, 8, b, true) 378 __uncore_write(write16, 16, w, true) 379 __uncore_write(write, 32, l, true) 380 __uncore_write(write_notrace, 32, l, false) 381 382 /* Be very careful with read/write 64-bit values. On 32-bit machines, they 383 * will be implemented using 2 32-bit writes in an arbitrary order with 384 * an arbitrary delay between them. This can cause the hardware to 385 * act upon the intermediate value, possibly leading to corruption and 386 * machine death. For this reason we do not support intel_uncore_write64, 387 * or uncore->funcs.mmio_writeq. 388 * 389 * When reading a 64-bit value as two 32-bit values, the delay may cause 390 * the two reads to mismatch, e.g. a timestamp overflowing. Also note that 391 * occasionally a 64-bit register does not actually support a full readq 392 * and must be read using two 32-bit reads. 393 * 394 * You have been warned. 395 */ 396 __uncore_read(read64, 64, q, true) 397 398 #define intel_uncore_posting_read(...) ((void)intel_uncore_read_notrace(__VA_ARGS__)) 399 #define intel_uncore_posting_read16(...) ((void)intel_uncore_read16_notrace(__VA_ARGS__)) 400 401 #undef __uncore_read 402 #undef __uncore_write 403 404 /* These are untraced mmio-accessors that are only valid to be used inside 405 * critical sections, such as inside IRQ handlers, where forcewake is explicitly 406 * controlled. 407 * 408 * Think twice, and think again, before using these. 409 * 410 * As an example, these accessors can possibly be used between: 411 * 412 * spin_lock_irq(&uncore->lock); 413 * intel_uncore_forcewake_get__locked(); 414 * 415 * and 416 * 417 * intel_uncore_forcewake_put__locked(); 418 * spin_unlock_irq(&uncore->lock); 419 * 420 * 421 * Note: some registers may not need forcewake held, so 422 * intel_uncore_forcewake_{get,put} can be omitted, see 423 * intel_uncore_forcewake_for_reg(). 424 * 425 * Certain architectures will die if the same cacheline is concurrently accessed 426 * by different clients (e.g. on Ivybridge). Access to registers should 427 * therefore generally be serialised, by either the dev_priv->uncore.lock or 428 * a more localised lock guarding all access to that bank of registers. 429 */ 430 #define intel_uncore_read_fw(...) __raw_uncore_read32(__VA_ARGS__) 431 #define intel_uncore_write_fw(...) __raw_uncore_write32(__VA_ARGS__) 432 #define intel_uncore_write64_fw(...) __raw_uncore_write64(__VA_ARGS__) 433 #define intel_uncore_posting_read_fw(...) ((void)intel_uncore_read_fw(__VA_ARGS__)) 434 435 static inline u32 intel_uncore_rmw(struct intel_uncore *uncore, 436 i915_reg_t reg, u32 clear, u32 set) 437 { 438 u32 old, val; 439 440 old = intel_uncore_read(uncore, reg); 441 val = (old & ~clear) | set; 442 intel_uncore_write(uncore, reg, val); 443 return old; 444 } 445 446 static inline void intel_uncore_rmw_fw(struct intel_uncore *uncore, 447 i915_reg_t reg, u32 clear, u32 set) 448 { 449 u32 old, val; 450 451 old = intel_uncore_read_fw(uncore, reg); 452 val = (old & ~clear) | set; 453 if (val != old) 454 intel_uncore_write_fw(uncore, reg, val); 455 } 456 457 static inline u64 458 intel_uncore_read64_2x32(struct intel_uncore *uncore, 459 i915_reg_t lower_reg, i915_reg_t upper_reg) 460 { 461 u32 upper, lower, old_upper, loop = 0; 462 enum forcewake_domains fw_domains; 463 unsigned long flags; 464 465 fw_domains = intel_uncore_forcewake_for_reg(uncore, lower_reg, 466 FW_REG_READ); 467 468 fw_domains |= intel_uncore_forcewake_for_reg(uncore, upper_reg, 469 FW_REG_READ); 470 471 spin_lock_irqsave(&uncore->lock, flags); 472 intel_uncore_forcewake_get__locked(uncore, fw_domains); 473 474 upper = intel_uncore_read_fw(uncore, upper_reg); 475 do { 476 old_upper = upper; 477 lower = intel_uncore_read_fw(uncore, lower_reg); 478 upper = intel_uncore_read_fw(uncore, upper_reg); 479 } while (upper != old_upper && loop++ < 2); 480 481 intel_uncore_forcewake_put__locked(uncore, fw_domains); 482 spin_unlock_irqrestore(&uncore->lock, flags); 483 484 return (u64)upper << 32 | lower; 485 } 486 487 static inline int intel_uncore_write_and_verify(struct intel_uncore *uncore, 488 i915_reg_t reg, u32 val, 489 u32 mask, u32 expected_val) 490 { 491 u32 reg_val; 492 493 intel_uncore_write(uncore, reg, val); 494 reg_val = intel_uncore_read(uncore, reg); 495 496 return (reg_val & mask) != expected_val ? -EINVAL : 0; 497 } 498 499 /* 500 * The raw_reg_{read,write} macros are intended as a micro-optimization for 501 * interrupt handlers so that the pointer indirection on uncore->regs can 502 * be computed once (and presumably cached in a register) instead of generating 503 * extra load instructions for each MMIO access. 504 * 505 * Given that these macros are only intended for non-GSI interrupt registers 506 * (and the goal is to avoid extra instructions generated by the compiler), 507 * these macros do not account for uncore->gsi_offset. Any caller that needs 508 * to use these macros on a GSI register is responsible for adding the 509 * appropriate GSI offset to the 'base' parameter. 510 */ 511 #define raw_reg_read(base, reg) \ 512 readl(base + i915_mmio_reg_offset(reg)) 513 #define raw_reg_write(base, reg, value) \ 514 writel(value, base + i915_mmio_reg_offset(reg)) 515 516 #endif /* !__INTEL_UNCORE_H__ */ 517