drivers/gpu/drm/i915/gt/intel_engine.h

   1 /* SPDX-License-Identifier: MIT */
   2 #ifndef _INTEL_RINGBUFFER_H_
   3 #define _INTEL_RINGBUFFER_H_
   4
   5 #include <asm/cacheflush.h>
   6 #include <drm/drm_util.h>
   7 #include <drm/drm_cache.h>
   8
   9 #include <linux/hashtable.h>
  10 #include <linux/irq_work.h>
  11 #include <linux/random.h>
  12 #include <linux/seqlock.h>
  13
  14 #include "i915_pmu.h"
  15 #include "i915_request.h"
  16 #include "i915_selftest.h"
  17 #include "intel_engine_types.h"
  18 #include "intel_gt_types.h"
  19 #include "intel_timeline.h"
  20 #include "intel_workarounds.h"
  21
  22 struct drm_printer;
  23 struct intel_context;
  24 struct intel_gt;
  25 struct lock_class_key;
  26
  27 /* Early gen2 devices have a cacheline of just 32 bytes, using 64 is overkill,
  28  * but keeps the logic simple. Indeed, the whole purpose of this macro is just
  29  * to give some inclination as to some of the magic values used in the various
  30  * workarounds!
  31  */
  32 #define CACHELINE_BYTES 64
  33 #define CACHELINE_DWORDS (CACHELINE_BYTES / sizeof(u32))
  34
  35 #define ENGINE_TRACE(e, fmt, ...) do {                                  \
  36         const struct intel_engine_cs *e__ __maybe_unused = (e);         \
  37         GEM_TRACE("%s %s: " fmt,                                        \
  38                   dev_name(e__->i915->drm.dev), e__->name,              \
  39                   ##__VA_ARGS__);                                       \
  40 } while (0)
  41
  42 /*
  43  * The register defines to be used with the following macros need to accept a
  44  * base param, e.g:
  45  *
  46  * REG_FOO(base) _MMIO((base) + <relative offset>)
  47  * ENGINE_READ(engine, REG_FOO);
  48  *
  49  * register arrays are to be defined and accessed as follows:
  50  *
  51  * REG_BAR(base, i) _MMIO((base) + <relative offset> + (i) * <shift>)
  52  * ENGINE_READ_IDX(engine, REG_BAR, i)
  53  */
  54
  55 #define __ENGINE_REG_OP(op__, engine__, ...) \
  56         intel_uncore_##op__((engine__)->uncore, __VA_ARGS__)
  57
  58 #define __ENGINE_READ_OP(op__, engine__, reg__) \
  59         __ENGINE_REG_OP(op__, (engine__), reg__((engine__)->mmio_base))
  60
  61 #define ENGINE_READ16(...)      __ENGINE_READ_OP(read16, __VA_ARGS__)
  62 #define ENGINE_READ(...)        __ENGINE_READ_OP(read, __VA_ARGS__)
  63 #define ENGINE_READ_FW(...)     __ENGINE_READ_OP(read_fw, __VA_ARGS__)
  64 #define ENGINE_POSTING_READ(...) __ENGINE_READ_OP(posting_read_fw, __VA_ARGS__)
  65 #define ENGINE_POSTING_READ16(...) __ENGINE_READ_OP(posting_read16, __VA_ARGS__)
  66
  67 #define ENGINE_READ64(engine__, lower_reg__, upper_reg__) \
  68         __ENGINE_REG_OP(read64_2x32, (engine__), \
  69                         lower_reg__((engine__)->mmio_base), \
  70                         upper_reg__((engine__)->mmio_base))
  71
  72 #define ENGINE_READ_IDX(engine__, reg__, idx__) \
  73         __ENGINE_REG_OP(read, (engine__), reg__((engine__)->mmio_base, (idx__)))
  74
  75 #define __ENGINE_WRITE_OP(op__, engine__, reg__, val__) \
  76         __ENGINE_REG_OP(op__, (engine__), reg__((engine__)->mmio_base), (val__))
  77
  78 #define ENGINE_WRITE16(...)     __ENGINE_WRITE_OP(write16, __VA_ARGS__)
  79 #define ENGINE_WRITE(...)       __ENGINE_WRITE_OP(write, __VA_ARGS__)
  80 #define ENGINE_WRITE_FW(...)    __ENGINE_WRITE_OP(write_fw, __VA_ARGS__)
  81
  82 #define GEN6_RING_FAULT_REG_READ(engine__) \
  83         intel_uncore_read((engine__)->uncore, RING_FAULT_REG(engine__))
  84
  85 #define GEN6_RING_FAULT_REG_POSTING_READ(engine__) \
  86         intel_uncore_posting_read((engine__)->uncore, RING_FAULT_REG(engine__))
  87
  88 #define GEN6_RING_FAULT_REG_RMW(engine__, clear__, set__) \
  89 ({ \
  90         u32 __val; \
  91 \
  92         __val = intel_uncore_read((engine__)->uncore, \
  93                                   RING_FAULT_REG(engine__)); \
  94         __val &= ~(clear__); \
  95         __val |= (set__); \
  96         intel_uncore_write((engine__)->uncore, RING_FAULT_REG(engine__), \
  97                            __val); \
  98 })
  99
 100 /* seqno size is actually only a uint32, but since we plan to use MI_FLUSH_DW to
 101  * do the writes, and that must have qw aligned offsets, simply pretend it's 8b.
 102  */
 103
 104 static inline unsigned int
 105 execlists_num_ports(const struct intel_engine_execlists * const execlists)
 106 {
 107         return execlists->port_mask + 1;
 108 }
 109
 110 static inline struct i915_request *
 111 execlists_active(const struct intel_engine_execlists *execlists)
 112 {
 113         struct i915_request * const *cur, * const *old, *active;
 114
 115         cur = READ_ONCE(execlists->active);
 116         smp_rmb(); /* pairs with overwrite protection in process_csb() */
 117         do {
 118                 old = cur;
 119
 120                 active = READ_ONCE(*cur);
 121                 cur = READ_ONCE(execlists->active);
 122
 123                 smp_rmb(); /* and complete the seqlock retry */
 124         } while (unlikely(cur != old));
 125
 126         return active;
 127 }
 128
 129 struct i915_request *
 130 execlists_unwind_incomplete_requests(struct intel_engine_execlists *execlists);
 131
 132 static inline u32
 133 intel_read_status_page(const struct intel_engine_cs *engine, int reg)
 134 {
 135         /* Ensure that the compiler doesn't optimize away the load. */
 136         return READ_ONCE(engine->status_page.addr[reg]);
 137 }
 138
 139 static inline void
 140 intel_write_status_page(struct intel_engine_cs *engine, int reg, u32 value)
 141 {
 142         /* Writing into the status page should be done sparingly. Since
 143          * we do when we are uncertain of the device state, we take a bit
 144          * of extra paranoia to try and ensure that the HWS takes the value
 145          * we give and that it doesn't end up trapped inside the CPU!
 146          */
 147         drm_clflush_virt_range(&engine->status_page.addr[reg], sizeof(value));
 148         WRITE_ONCE(engine->status_page.addr[reg], value);
 149         drm_clflush_virt_range(&engine->status_page.addr[reg], sizeof(value));
 150 }
 151
 152 /*
 153  * Reads a dword out of the status page, which is written to from the command
 154  * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
 155  * MI_STORE_DATA_IMM.
 156  *
 157  * The following dwords have a reserved meaning:
 158  * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
 159  * 0x04: ring 0 head pointer
 160  * 0x05: ring 1 head pointer (915-class)
 161  * 0x06: ring 2 head pointer (915-class)
 162  * 0x10-0x1b: Context status DWords (GM45)
 163  * 0x1f: Last written status offset. (GM45)
 164  * 0x20-0x2f: Reserved (Gen6+)
 165  *
 166  * The area from dword 0x30 to 0x3ff is available for driver usage.
 167  */
 168 #define I915_GEM_HWS_PREEMPT            0x32
 169 #define I915_GEM_HWS_PREEMPT_ADDR       (I915_GEM_HWS_PREEMPT * sizeof(u32))
 170 #define I915_GEM_HWS_SEQNO              0x40
 171 #define I915_GEM_HWS_SEQNO_ADDR         (I915_GEM_HWS_SEQNO * sizeof(u32))
 172 #define I915_GEM_HWS_MIGRATE            (0x42 * sizeof(u32))
 173 #define I915_GEM_HWS_PXP                0x60
 174 #define I915_GEM_HWS_PXP_ADDR           (I915_GEM_HWS_PXP * sizeof(u32))
 175 #define I915_GEM_HWS_GSC                0x62
 176 #define I915_GEM_HWS_GSC_ADDR           (I915_GEM_HWS_GSC * sizeof(u32))
 177 #define I915_GEM_HWS_SCRATCH            0x80
 178
 179 #define I915_HWS_CSB_BUF0_INDEX         0x10
 180 #define I915_HWS_CSB_WRITE_INDEX        0x1f
 181 #define ICL_HWS_CSB_WRITE_INDEX         0x2f
 182 #define INTEL_HWS_CSB_WRITE_INDEX(__i915) \
 183         (GRAPHICS_VER(__i915) >= 11 ? ICL_HWS_CSB_WRITE_INDEX : I915_HWS_CSB_WRITE_INDEX)
 184
 185 void intel_engine_stop(struct intel_engine_cs *engine);
 186 void intel_engine_cleanup(struct intel_engine_cs *engine);
 187
 188 int intel_engines_init_mmio(struct intel_gt *gt);
 189 int intel_engines_init(struct intel_gt *gt);
 190
 191 void intel_engine_free_request_pool(struct intel_engine_cs *engine);
 192
 193 void intel_engines_release(struct intel_gt *gt);
 194 void intel_engines_free(struct intel_gt *gt);
 195
 196 int intel_engine_init_common(struct intel_engine_cs *engine);
 197 void intel_engine_cleanup_common(struct intel_engine_cs *engine);
 198
 199 int intel_engine_resume(struct intel_engine_cs *engine);
 200
 201 int intel_ring_submission_setup(struct intel_engine_cs *engine);
 202
 203 int intel_engine_stop_cs(struct intel_engine_cs *engine);
 204 void intel_engine_cancel_stop_cs(struct intel_engine_cs *engine);
 205
 206 void intel_engine_wait_for_pending_mi_fw(struct intel_engine_cs *engine);
 207
 208 void intel_engine_set_hwsp_writemask(struct intel_engine_cs *engine, u32 mask);
 209
 210 u64 intel_engine_get_active_head(const struct intel_engine_cs *engine);
 211 u64 intel_engine_get_last_batch_head(const struct intel_engine_cs *engine);
 212
 213 void intel_engine_get_instdone(const struct intel_engine_cs *engine,
 214                                struct intel_instdone *instdone);
 215
 216 void intel_engine_init_execlists(struct intel_engine_cs *engine);
 217
 218 bool intel_engine_irq_enable(struct intel_engine_cs *engine);
 219 void intel_engine_irq_disable(struct intel_engine_cs *engine);
 220
 221 static inline void __intel_engine_reset(struct intel_engine_cs *engine,
 222                                         bool stalled)
 223 {
 224         if (engine->reset.rewind)
 225                 engine->reset.rewind(engine, stalled);
 226         engine->serial++; /* contexts lost */
 227 }
 228
 229 bool intel_engines_are_idle(struct intel_gt *gt);
 230 bool intel_engine_is_idle(struct intel_engine_cs *engine);
 231
 232 void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync);
 233 static inline void intel_engine_flush_submission(struct intel_engine_cs *engine)
 234 {
 235         __intel_engine_flush_submission(engine, true);
 236 }
 237
 238 void intel_engines_reset_default_submission(struct intel_gt *gt);
 239
 240 bool intel_engine_can_store_dword(struct intel_engine_cs *engine);
 241
 242 __printf(3, 4)
 243 void intel_engine_dump(struct intel_engine_cs *engine,
 244                        struct drm_printer *m,
 245                        const char *header, ...);
 246 void intel_engine_dump_active_requests(struct list_head *requests,
 247                                        struct i915_request *hung_rq,
 248                                        struct drm_printer *m);
 249
 250 ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine,
 251                                    ktime_t *now);
 252
 253 void intel_engine_get_hung_entity(struct intel_engine_cs *engine,
 254                                   struct intel_context **ce, struct i915_request **rq);
 255
 256 u32 intel_engine_context_size(struct intel_gt *gt, u8 class);
 257 struct intel_context *
 258 intel_engine_create_pinned_context(struct intel_engine_cs *engine,
 259                                    struct i915_address_space *vm,
 260                                    unsigned int ring_size,
 261                                    unsigned int hwsp,
 262                                    struct lock_class_key *key,
 263                                    const char *name);
 264
 265 void intel_engine_destroy_pinned_context(struct intel_context *ce);
 266
 267 void xehp_enable_ccs_engines(struct intel_engine_cs *engine);
 268
 269 #define ENGINE_PHYSICAL 0
 270 #define ENGINE_MOCK     1
 271 #define ENGINE_VIRTUAL  2
 272
 273 static inline bool intel_engine_uses_guc(const struct intel_engine_cs *engine)
 274 {
 275         return engine->gt->submission_method >= INTEL_SUBMISSION_GUC;
 276 }
 277
 278 static inline bool
 279 intel_engine_has_preempt_reset(const struct intel_engine_cs *engine)
 280 {
 281         if (!CONFIG_DRM_I915_PREEMPT_TIMEOUT)
 282                 return false;
 283
 284         return intel_engine_has_preemption(engine);
 285 }
 286
 287 #define FORCE_VIRTUAL   BIT(0)
 288 struct intel_context *
 289 intel_engine_create_virtual(struct intel_engine_cs **siblings,
 290                             unsigned int count, unsigned long flags);
 291
 292 static inline struct intel_context *
 293 intel_engine_create_parallel(struct intel_engine_cs **engines,
 294                              unsigned int num_engines,
 295                              unsigned int width)
 296 {
 297         GEM_BUG_ON(!engines[0]->cops->create_parallel);
 298         return engines[0]->cops->create_parallel(engines, num_engines, width);
 299 }
 300
 301 static inline bool
 302 intel_virtual_engine_has_heartbeat(const struct intel_engine_cs *engine)
 303 {
 304         /*
 305          * For non-GuC submission we expect the back-end to look at the
 306          * heartbeat status of the actual physical engine that the work
 307          * has been (or is being) scheduled on, so we should only reach
 308          * here with GuC submission enabled.
 309          */
 310         GEM_BUG_ON(!intel_engine_uses_guc(engine));
 311
 312         return intel_guc_virtual_engine_has_heartbeat(engine);
 313 }
 314
 315 static inline bool
 316 intel_engine_has_heartbeat(const struct intel_engine_cs *engine)
 317 {
 318         if (!CONFIG_DRM_I915_HEARTBEAT_INTERVAL)
 319                 return false;
 320
 321         if (intel_engine_is_virtual(engine))
 322                 return intel_virtual_engine_has_heartbeat(engine);
 323         else
 324                 return READ_ONCE(engine->props.heartbeat_interval_ms);
 325 }
 326
 327 static inline struct intel_engine_cs *
 328 intel_engine_get_sibling(struct intel_engine_cs *engine, unsigned int sibling)
 329 {
 330         GEM_BUG_ON(!intel_engine_is_virtual(engine));
 331         return engine->cops->get_sibling(engine, sibling);
 332 }
 333
 334 static inline void
 335 intel_engine_set_hung_context(struct intel_engine_cs *engine,
 336                               struct intel_context *ce)
 337 {
 338         engine->hung_ce = ce;
 339 }
 340
 341 static inline void
 342 intel_engine_clear_hung_context(struct intel_engine_cs *engine)
 343 {
 344         intel_engine_set_hung_context(engine, NULL);
 345 }
 346
 347 static inline struct intel_context *
 348 intel_engine_get_hung_context(struct intel_engine_cs *engine)
 349 {
 350         return engine->hung_ce;
 351 }
 352
 353 u64 intel_clamp_heartbeat_interval_ms(struct intel_engine_cs *engine, u64 value);
 354 u64 intel_clamp_max_busywait_duration_ns(struct intel_engine_cs *engine, u64 value);
 355 u64 intel_clamp_preempt_timeout_ms(struct intel_engine_cs *engine, u64 value);
 356 u64 intel_clamp_stop_timeout_ms(struct intel_engine_cs *engine, u64 value);
 357 u64 intel_clamp_timeslice_duration_ms(struct intel_engine_cs *engine, u64 value);
 358
 359 #endif /* _INTEL_RINGBUFFER_H_ */