From: Tom Stellard <thomas.stell...@amd.com> This is necessary to prevent the next SURFACE_SYNC packet from hanging the GPU.
https://bugs.freedesktop.org/show_bug.cgi?id=73418 CC: "9.2" "10.0" <mesa-sta...@lists.freedesktop.org> --- src/gallium/drivers/r600/evergreen_compute.c | 9 ++++++++- src/gallium/drivers/r600/evergreend.h | 1 + src/gallium/drivers/r600/r600_hw_context.c | 4 +--- src/gallium/drivers/r600/r600_pipe.h | 10 ---------- 4 files changed, 10 insertions(+), 14 deletions(-) diff --git a/src/gallium/drivers/r600/evergreen_compute.c b/src/gallium/drivers/r600/evergreen_compute.c index a2db69b..70efe5c 100644 --- a/src/gallium/drivers/r600/evergreen_compute.c +++ b/src/gallium/drivers/r600/evergreen_compute.c @@ -489,7 +489,14 @@ static void compute_emit_cs(struct r600_context *ctx, const uint *block_layout, ctx->b.flags = 0; if (ctx->b.chip_class >= CAYMAN) { - ctx->skip_surface_sync_on_next_cs_flush = true; + cs->buf[cs->cdw++] = PKT3(PKT3_EVENT_WRITE, 0, 0); + cs->buf[cs->cdw++] = EVENT_TYPE(EVENT_TYPE_CS_PARTIAL_FLUSH) | EVENT_INDEX(4); + /* DEALLOC_STATE prevents the GPU from hanging when a + * SURFACE_SYNC packet is emitted some time after a DISPATCH_DIRECT + * with any of the CB*_DEST_BASE_ENA or DB_DEST_BASE_ENA bits set. + */ + cs->buf[cs->cdw++] = PKT3C(PKT3_DEALLOC_STATE, 0, 0); + cs->buf[cs->cdw++] = 0; } #if 0 diff --git a/src/gallium/drivers/r600/evergreend.h b/src/gallium/drivers/r600/evergreend.h index 2f2e145..9ba3db7 100644 --- a/src/gallium/drivers/r600/evergreend.h +++ b/src/gallium/drivers/r600/evergreend.h @@ -63,6 +63,7 @@ #define R600_TEXEL_PITCH_ALIGNMENT_MASK 0x7 #define PKT3_NOP 0x10 +#define PKT3_DEALLOC_STATE 0x14 #define PKT3_DISPATCH_DIRECT 0x15 #define PKT3_DISPATCH_INDIRECT 0x16 #define PKT3_INDIRECT_BUFFER_END 0x17 diff --git a/src/gallium/drivers/r600/r600_hw_context.c b/src/gallium/drivers/r600/r600_hw_context.c index da90d63..7afd4b0 100644 --- a/src/gallium/drivers/r600/r600_hw_context.c +++ b/src/gallium/drivers/r600/r600_hw_context.c @@ -293,7 +293,7 @@ void r600_flush_emit(struct r600_context *rctx) S_0085F0_SMX_ACTION_ENA(1); } - if (cp_coher_cntl && !rctx->skip_surface_sync_on_next_cs_flush) { + if (cp_coher_cntl) { cs->buf[cs->cdw++] = PKT3(PKT3_SURFACE_SYNC, 3, 0); cs->buf[cs->cdw++] = cp_coher_cntl; /* CP_COHER_CNTL */ cs->buf[cs->cdw++] = 0xffffffff; /* CP_COHER_SIZE */ @@ -354,8 +354,6 @@ void r600_context_flush(struct r600_context *ctx, unsigned flags) /* Flush the CS. */ ctx->b.ws->cs_flush(ctx->b.rings.gfx.cs, flags, ctx->screen->cs_count++); - - ctx->skip_surface_sync_on_next_cs_flush = false; } void r600_begin_new_cs(struct r600_context *ctx) diff --git a/src/gallium/drivers/r600/r600_pipe.h b/src/gallium/drivers/r600/r600_pipe.h index 7350479..88b0860 100644 --- a/src/gallium/drivers/r600/r600_pipe.h +++ b/src/gallium/drivers/r600/r600_pipe.h @@ -499,16 +499,6 @@ struct r600_context { void *sb_context; struct r600_isa *isa; - - /* Work-around for flushing problems with compute shaders on Cayman: - * Emitting a SURFACE_SYNC packet with any of the CB*_DEST_BASE_ENA - * or DB_DEST_BASE_ENA bits set after dispatching a compute shader - * hangs the GPU. - * - * Setting this to true will prevent r600_flush_emit() from emitting - * a SURFACE_SYNC packet. This field will be cleared by - * by r600_context_flush() after flushing the command stream. */ - boolean skip_surface_sync_on_next_cs_flush; }; static INLINE void r600_emit_command_buffer(struct radeon_winsys_cs *cs, -- 1.8.1.5 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
