diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_lrc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_lrc.c | 58 |
1 files changed, 37 insertions, 21 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 0412a44f25f2..a32aabce7901 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1140,9 +1140,8 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine) /* Check in case we rollback so far we wrap [size/2] */ if (intel_ring_direction(rq->ring, - intel_ring_wrap(rq->ring, - rq->tail), - rq->ring->tail) > 0) + rq->tail, + rq->ring->tail + 8) > 0) rq->context->lrc.desc |= CTX_DESC_FORCE_RESTORE; active = rq; @@ -2464,7 +2463,7 @@ cancel_port_requests(struct intel_engine_execlists * const execlists) } static inline void -invalidate_csb_entries(const u32 *first, const u32 *last) +invalidate_csb_entries(const u64 *first, const u64 *last) { clflush((void *)first); clflush((void *)last); @@ -2496,14 +2495,25 @@ invalidate_csb_entries(const u32 *first, const u32 *last) * bits 47-57: sw context id of the lrc the GT switched away from * bits 58-63: sw counter of the lrc the GT switched away from */ -static inline bool -gen12_csb_parse(const struct intel_engine_execlists *execlists, const u32 *csb) -{ - u32 lower_dw = csb[0]; - u32 upper_dw = csb[1]; - bool ctx_to_valid = GEN12_CSB_CTX_VALID(lower_dw); - bool ctx_away_valid = GEN12_CSB_CTX_VALID(upper_dw); - bool new_queue = lower_dw & GEN12_CTX_STATUS_SWITCHED_TO_NEW_QUEUE; +static inline bool gen12_csb_parse(const u64 *csb) +{ + bool ctx_away_valid; + bool new_queue; + u64 entry; + + /* HSD#22011248461 */ + entry = READ_ONCE(*csb); + if (unlikely(entry == -1)) { + preempt_disable(); + if (wait_for_atomic_us((entry = READ_ONCE(*csb)) != -1, 50)) + GEM_WARN_ON("50us CSB timeout"); + preempt_enable(); + } + WRITE_ONCE(*(u64 *)csb, -1); + + ctx_away_valid = GEN12_CSB_CTX_VALID(upper_32_bits(entry)); + new_queue = + lower_32_bits(entry) & GEN12_CTX_STATUS_SWITCHED_TO_NEW_QUEUE; /* * The context switch detail is not guaranteed to be 5 when a preemption @@ -2513,7 +2523,7 @@ gen12_csb_parse(const struct intel_engine_execlists *execlists, const u32 *csb) * would require some extra handling, but we don't support that. */ if (!ctx_away_valid || new_queue) { - GEM_BUG_ON(!ctx_to_valid); + GEM_BUG_ON(!GEN12_CSB_CTX_VALID(lower_32_bits(entry))); return true; } @@ -2522,12 +2532,11 @@ gen12_csb_parse(const struct intel_engine_execlists *execlists, const u32 *csb) * context switch on an unsuccessful wait instruction since we always * use polling mode. */ - GEM_BUG_ON(GEN12_CTX_SWITCH_DETAIL(upper_dw)); + GEM_BUG_ON(GEN12_CTX_SWITCH_DETAIL(upper_32_bits(entry))); return false; } -static inline bool -gen8_csb_parse(const struct intel_engine_execlists *execlists, const u32 *csb) +static inline bool gen8_csb_parse(const u64 *csb) { return *csb & (GEN8_CTX_STATUS_IDLE_ACTIVE | GEN8_CTX_STATUS_PREEMPTED); } @@ -2535,7 +2544,7 @@ gen8_csb_parse(const struct intel_engine_execlists *execlists, const u32 *csb) static void process_csb(struct intel_engine_cs *engine) { struct intel_engine_execlists * const execlists = &engine->execlists; - const u32 * const buf = execlists->csb_status; + const u64 * const buf = execlists->csb_status; const u8 num_entries = execlists->csb_size; u8 head, tail; @@ -2616,12 +2625,14 @@ static void process_csb(struct intel_engine_cs *engine) */ ENGINE_TRACE(engine, "csb[%d]: status=0x%08x:0x%08x\n", - head, buf[2 * head + 0], buf[2 * head + 1]); + head, + upper_32_bits(buf[head]), + lower_32_bits(buf[head])); if (INTEL_GEN(engine->i915) >= 12) - promote = gen12_csb_parse(execlists, buf + 2 * head); + promote = gen12_csb_parse(buf + head); else - promote = gen8_csb_parse(execlists, buf + 2 * head); + promote = gen8_csb_parse(buf + head); if (promote) { struct i915_request * const *old = execlists->active; @@ -2649,6 +2660,9 @@ static void process_csb(struct intel_engine_cs *engine) smp_wmb(); /* complete the seqlock */ WRITE_ONCE(execlists->active, execlists->inflight); + /* XXX Magic delay for tgl */ + ENGINE_POSTING_READ(engine, RING_CONTEXT_STATUS_PTR); + WRITE_ONCE(execlists->pending[0], NULL); } else { if (GEM_WARN_ON(!*execlists->active)) { @@ -4005,6 +4019,8 @@ static void reset_csb_pointers(struct intel_engine_cs *engine) WRITE_ONCE(*execlists->csb_write, reset_value); wmb(); /* Make sure this is visible to HW (paranoia?) */ + /* Check that the GPU does indeed update the CSB entries! */ + memset(execlists->csb_status, -1, (reset_value + 1) * sizeof(u64)); invalidate_csb_entries(&execlists->csb_status[0], &execlists->csb_status[reset_value]); @@ -5157,7 +5173,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine) } execlists->csb_status = - &engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX]; + (u64 *)&engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX]; execlists->csb_write = &engine->status_page.addr[intel_hws_csb_write_index(i915)]; |