From 0504cffc7b128dc4bd751821abe7c47203d7bd62 Mon Sep 17 00:00:00 2001 From: Arun Siluvery Date: Tue, 14 Jul 2015 15:01:27 +0100 Subject: [PATCH] drm/i915: Enable WA batch buffers for Gen9 This patch only enables support for Gen9, the actual WA will be initialized in subsequent patches. The WARN that we use to warn user if WA batch support is not available for a particular Gen is replaced with DRM_ERROR as warning here doesn't really add much value. v2: include all infrastructure bits in this patch so that subsequent changes only correspond the WA added (Chris) v3: use updated macro. Reviewed-by: Mika Kuoppala Cc: Imre Deak Cc: Mika Kuoppala Signed-off-by: Arun Siluvery Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_lrc.c | 50 ++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index d7f66d289970..f1a382c685a5 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1248,6 +1248,35 @@ static int gen8_init_perctx_bb(struct intel_engine_cs *ring, return wa_ctx_end(wa_ctx, *offset = index, 1); } +static int gen9_init_indirectctx_bb(struct intel_engine_cs *ring, + struct i915_wa_ctx_bb *wa_ctx, + uint32_t *const batch, + uint32_t *offset) +{ + uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS); + + /* FIXME: Replace me with WA */ + wa_ctx_emit(batch, index, MI_NOOP); + + /* Pad to end of cacheline */ + while (index % CACHELINE_DWORDS) + wa_ctx_emit(batch, index, MI_NOOP); + + return wa_ctx_end(wa_ctx, *offset = index, CACHELINE_DWORDS); +} + +static int gen9_init_perctx_bb(struct intel_engine_cs *ring, + struct i915_wa_ctx_bb *wa_ctx, + uint32_t *const batch, + uint32_t *offset) +{ + uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS); + + wa_ctx_emit(batch, index, MI_BATCH_BUFFER_END); + + return wa_ctx_end(wa_ctx, *offset = index, 1); +} + static int lrc_setup_wa_ctx_obj(struct intel_engine_cs *ring, u32 size) { int ret; @@ -1289,10 +1318,11 @@ static int intel_init_workaround_bb(struct intel_engine_cs *ring) WARN_ON(ring->id != RCS); /* update this when WA for higher Gen are added */ - if (WARN(INTEL_INFO(ring->dev)->gen > 8, - "WA batch buffer is not initialized for Gen%d\n", - INTEL_INFO(ring->dev)->gen)) + if (INTEL_INFO(ring->dev)->gen > 9) { + DRM_ERROR("WA batch buffer is not initialized for Gen%d\n", + INTEL_INFO(ring->dev)->gen); return 0; + } /* some WA perform writes to scratch page, ensure it is valid */ if (ring->scratch.obj == NULL) { @@ -1324,6 +1354,20 @@ static int intel_init_workaround_bb(struct intel_engine_cs *ring) &offset); if (ret) goto out; + } else if (INTEL_INFO(ring->dev)->gen == 9) { + ret = gen9_init_indirectctx_bb(ring, + &wa_ctx->indirect_ctx, + batch, + &offset); + if (ret) + goto out; + + ret = gen9_init_perctx_bb(ring, + &wa_ctx->per_ctx, + batch, + &offset); + if (ret) + goto out; } out: -- 2.20.1