[Mesa-dev] [PATCH] radeonsi: remove Constant Engine support

Marek Olšák maraeo at gmail.com
Sat Aug 19 17:03:41 UTC 2017


From: Marek Olšák <marek.olsak at amd.com>

We have come to the conclusion that it doesn't improve performance.
---
 src/gallium/drivers/radeon/r600_gpu_load.c    |   3 -
 src/gallium/drivers/radeon/r600_pipe_common.c |   2 -
 src/gallium/drivers/radeon/r600_pipe_common.h |   5 +-
 src/gallium/drivers/radeon/r600_query.c       |   3 -
 src/gallium/drivers/radeon/r600_query.h       |   1 -
 src/gallium/drivers/radeon/radeon_winsys.h    |  30 ---
 src/gallium/drivers/radeonsi/si_compute.c     |   4 -
 src/gallium/drivers/radeonsi/si_debug.c       |  12 +-
 src/gallium/drivers/radeonsi/si_descriptors.c | 274 +++-----------------------
 src/gallium/drivers/radeonsi/si_hw_context.c  |  52 +----
 src/gallium/drivers/radeonsi/si_pipe.c        |  43 ----
 src/gallium/drivers/radeonsi/si_pipe.h        |   9 -
 src/gallium/drivers/radeonsi/si_state.h       |  18 --
 src/gallium/drivers/radeonsi/si_state_draw.c  |  39 ----
 src/gallium/winsys/amdgpu/drm/amdgpu_cs.c     |  98 ---------
 src/gallium/winsys/amdgpu/drm/amdgpu_cs.h     |  12 +-
 16 files changed, 35 insertions(+), 570 deletions(-)

diff --git a/src/gallium/drivers/radeon/r600_gpu_load.c b/src/gallium/drivers/radeon/r600_gpu_load.c
index 4e9f7ea..ee9f592 100644
--- a/src/gallium/drivers/radeon/r600_gpu_load.c
+++ b/src/gallium/drivers/radeon/r600_gpu_load.c
@@ -116,21 +116,20 @@ static void r600_update_mmio_counters(struct r600_common_screen *rscreen,
 	if (rscreen->chip_class >= VI) {
 		/* CP_STAT */
 		rscreen->ws->read_registers(rscreen->ws, CP_STAT, 1, &value);
 
 		UPDATE_COUNTER(pfp, PFP_BUSY);
 		UPDATE_COUNTER(meq, MEQ_BUSY);
 		UPDATE_COUNTER(me, ME_BUSY);
 		UPDATE_COUNTER(surf_sync, SURFACE_SYNC_BUSY);
 		UPDATE_COUNTER(cp_dma, DMA_BUSY);
 		UPDATE_COUNTER(scratch_ram, SCRATCH_RAM_BUSY);
-		UPDATE_COUNTER(ce, CE_BUSY);
 	}
 
 	value = gui_busy || sdma_busy;
 	UPDATE_COUNTER(gpu, IDENTITY);
 }
 
 #undef UPDATE_COUNTER
 
 static int
 r600_gpu_load_thread(void *param)
@@ -259,22 +258,20 @@ static unsigned busy_index_from_type(struct r600_common_screen *rscreen,
 	case R600_QUERY_GPU_MEQ_BUSY:
 		return BUSY_INDEX(rscreen, meq);
 	case R600_QUERY_GPU_ME_BUSY:
 		return BUSY_INDEX(rscreen, me);
 	case R600_QUERY_GPU_SURF_SYNC_BUSY:
 		return BUSY_INDEX(rscreen, surf_sync);
 	case R600_QUERY_GPU_CP_DMA_BUSY:
 		return BUSY_INDEX(rscreen, cp_dma);
 	case R600_QUERY_GPU_SCRATCH_RAM_BUSY:
 		return BUSY_INDEX(rscreen, scratch_ram);
-	case R600_QUERY_GPU_CE_BUSY:
-		return BUSY_INDEX(rscreen, ce);
 	default:
 		unreachable("invalid query type");
 	}
 }
 
 uint64_t r600_begin_counter(struct r600_common_screen *rscreen, unsigned type)
 {
 	unsigned busy_index = busy_index_from_type(rscreen, type);
 	return r600_read_mmio_counter(rscreen, busy_index);
 }
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 4d1b31d..f1f0cb3 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -818,22 +818,20 @@ static const struct debug_named_value common_debug_options[] = {
 	{ "switch_on_eop", DBG_SWITCH_ON_EOP, "Program WD/IA to switch on end-of-packet." },
 	{ "forcedma", DBG_FORCE_DMA, "Use asynchronous DMA for all operations when possible." },
 	{ "precompile", DBG_PRECOMPILE, "Compile one shader variant at shader creation." },
 	{ "nowc", DBG_NO_WC, "Disable GTT write combining" },
 	{ "check_vm", DBG_CHECK_VM, "Check VM faults and dump debug info." },
 	{ "nodcc", DBG_NO_DCC, "Disable DCC." },
 	{ "nodccclear", DBG_NO_DCC_CLEAR, "Disable DCC fast clear." },
 	{ "norbplus", DBG_NO_RB_PLUS, "Disable RB+." },
 	{ "sisched", DBG_SI_SCHED, "Enable LLVM SI Machine Instruction Scheduler." },
 	{ "mono", DBG_MONOLITHIC_SHADERS, "Use old-style monolithic shaders compiled on demand" },
-	{ "ce", DBG_CE, "Force enable the constant engine" },
-	{ "noce", DBG_NO_CE, "Disable the constant engine"},
 	{ "unsafemath", DBG_UNSAFE_MATH, "Enable unsafe math shader optimizations" },
 	{ "nodccfb", DBG_NO_DCC_FB, "Disable separate DCC on the main framebuffer" },
 
 	DEBUG_NAMED_VALUE_END /* must be last */
 };
 
 static const char* r600_get_vendor(struct pipe_screen* pscreen)
 {
 	return "X.Org";
 }
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index 8be11ef..6072e24 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -63,21 +63,21 @@
 
 /* special primitive types */
 #define R600_PRIM_RECTANGLE_LIST	PIPE_PRIM_MAX
 
 /* Debug flags. */
 /* logging and features */
 #define DBG_TEX			(1 << 0)
 #define DBG_NIR			(1 << 1)
 #define DBG_COMPUTE		(1 << 2)
 #define DBG_VM			(1 << 3)
-#define DBG_CE			(1 << 4)
+/* gap */
 /* shader logging */
 #define DBG_FS			(1 << 5)
 #define DBG_VS			(1 << 6)
 #define DBG_GS			(1 << 7)
 #define DBG_PS			(1 << 8)
 #define DBG_CS			(1 << 9)
 #define DBG_TCS			(1 << 10)
 #define DBG_TES			(1 << 11)
 #define DBG_NO_IR		(1 << 12)
 #define DBG_NO_TGSI		(1 << 13)
@@ -99,21 +99,21 @@
 #define DBG_FORCE_DMA		(1ull << 38)
 #define DBG_PRECOMPILE		(1ull << 39)
 #define DBG_INFO		(1ull << 40)
 #define DBG_NO_WC		(1ull << 41)
 #define DBG_CHECK_VM		(1ull << 42)
 #define DBG_NO_DCC		(1ull << 43)
 #define DBG_NO_DCC_CLEAR	(1ull << 44)
 #define DBG_NO_RB_PLUS		(1ull << 45)
 #define DBG_SI_SCHED		(1ull << 46)
 #define DBG_MONOLITHIC_SHADERS	(1ull << 47)
-#define DBG_NO_CE		(1ull << 48)
+/* gap */
 #define DBG_UNSAFE_MATH		(1ull << 49)
 #define DBG_NO_DCC_FB		(1ull << 50)
 #define DBG_TEST_VMFAULT_CP	(1ull << 51)
 #define DBG_TEST_VMFAULT_SDMA	(1ull << 52)
 #define DBG_TEST_VMFAULT_SHADER	(1ull << 53)
 
 #define R600_MAP_BUFFER_ALIGNMENT 64
 #define R600_MAX_VIEWPORTS        16
 
 #define SI_MAX_VARIABLE_THREADS_PER_BLOCK 1024
@@ -366,21 +366,20 @@ union r600_mmio_counters {
 		/* SRBM_STATUS2 */
 		struct r600_mmio_counter sdma;
 
 		/* CP_STAT */
 		struct r600_mmio_counter pfp;
 		struct r600_mmio_counter meq;
 		struct r600_mmio_counter me;
 		struct r600_mmio_counter surf_sync;
 		struct r600_mmio_counter cp_dma;
 		struct r600_mmio_counter scratch_ram;
-		struct r600_mmio_counter ce;
 	} named;
 	unsigned array[0];
 };
 
 struct r600_memory_object {
 	struct pipe_memory_object	b;
 	struct pb_buffer		*buf;
 	uint32_t			stride;
 	uint32_t			offset;
 };
diff --git a/src/gallium/drivers/radeon/r600_query.c b/src/gallium/drivers/radeon/r600_query.c
index bccfe7f..98bdd80 100644
--- a/src/gallium/drivers/radeon/r600_query.c
+++ b/src/gallium/drivers/radeon/r600_query.c
@@ -212,21 +212,20 @@ static bool r600_query_sw_begin(struct r600_common_context *rctx,
 	case R600_QUERY_GPU_DB_BUSY:
 	case R600_QUERY_GPU_CP_BUSY:
 	case R600_QUERY_GPU_CB_BUSY:
 	case R600_QUERY_GPU_SDMA_BUSY:
 	case R600_QUERY_GPU_PFP_BUSY:
 	case R600_QUERY_GPU_MEQ_BUSY:
 	case R600_QUERY_GPU_ME_BUSY:
 	case R600_QUERY_GPU_SURF_SYNC_BUSY:
 	case R600_QUERY_GPU_CP_DMA_BUSY:
 	case R600_QUERY_GPU_SCRATCH_RAM_BUSY:
-	case R600_QUERY_GPU_CE_BUSY:
 		query->begin_result = r600_begin_counter(rctx->screen,
 							 query->b.type);
 		break;
 	case R600_QUERY_NUM_COMPILATIONS:
 		query->begin_result = p_atomic_read(&rctx->screen->num_compilations);
 		break;
 	case R600_QUERY_NUM_SHADERS_CREATED:
 		query->begin_result = p_atomic_read(&rctx->screen->num_shaders_created);
 		break;
 	case R600_QUERY_NUM_SHADER_CACHE_HITS:
@@ -369,21 +368,20 @@ static bool r600_query_sw_end(struct r600_common_context *rctx,
 	case R600_QUERY_GPU_DB_BUSY:
 	case R600_QUERY_GPU_CP_BUSY:
 	case R600_QUERY_GPU_CB_BUSY:
 	case R600_QUERY_GPU_SDMA_BUSY:
 	case R600_QUERY_GPU_PFP_BUSY:
 	case R600_QUERY_GPU_MEQ_BUSY:
 	case R600_QUERY_GPU_ME_BUSY:
 	case R600_QUERY_GPU_SURF_SYNC_BUSY:
 	case R600_QUERY_GPU_CP_DMA_BUSY:
 	case R600_QUERY_GPU_SCRATCH_RAM_BUSY:
-	case R600_QUERY_GPU_CE_BUSY:
 		query->end_result = r600_end_counter(rctx->screen,
 						     query->b.type,
 						     query->begin_result);
 		query->begin_result = 0;
 		break;
 	case R600_QUERY_NUM_COMPILATIONS:
 		query->end_result = p_atomic_read(&rctx->screen->num_compilations);
 		break;
 	case R600_QUERY_NUM_SHADERS_CREATED:
 		query->end_result = p_atomic_read(&rctx->screen->num_shaders_created);
@@ -2068,21 +2066,20 @@ static struct pipe_driver_query_info r600_driver_query_list[] = {
 	X("GPU-db-busy",		GPU_DB_BUSY,		UINT64, AVERAGE),
 	X("GPU-cp-busy",		GPU_CP_BUSY,		UINT64, AVERAGE),
 	X("GPU-cb-busy",		GPU_CB_BUSY,		UINT64, AVERAGE),
 	X("GPU-sdma-busy",		GPU_SDMA_BUSY,		UINT64, AVERAGE),
 	X("GPU-pfp-busy",		GPU_PFP_BUSY,		UINT64, AVERAGE),
 	X("GPU-meq-busy",		GPU_MEQ_BUSY,		UINT64, AVERAGE),
 	X("GPU-me-busy",		GPU_ME_BUSY,		UINT64, AVERAGE),
 	X("GPU-surf-sync-busy",		GPU_SURF_SYNC_BUSY,	UINT64, AVERAGE),
 	X("GPU-cp-dma-busy",		GPU_CP_DMA_BUSY,	UINT64, AVERAGE),
 	X("GPU-scratch-ram-busy",	GPU_SCRATCH_RAM_BUSY,	UINT64, AVERAGE),
-	X("GPU-ce-busy",		GPU_CE_BUSY,		UINT64, AVERAGE),
 };
 
 #undef X
 #undef XG
 #undef XFULL
 
 static unsigned r600_get_num_queries(struct r600_common_screen *rscreen)
 {
 	if (rscreen->info.drm_major == 2 && rscreen->info.drm_minor >= 42)
 		return ARRAY_SIZE(r600_driver_query_list);
diff --git a/src/gallium/drivers/radeon/r600_query.h b/src/gallium/drivers/radeon/r600_query.h
index 815dc7f..7455c8e 100644
--- a/src/gallium/drivers/radeon/r600_query.h
+++ b/src/gallium/drivers/radeon/r600_query.h
@@ -95,21 +95,20 @@ enum {
 	R600_QUERY_GPU_DB_BUSY,
 	R600_QUERY_GPU_CP_BUSY,
 	R600_QUERY_GPU_CB_BUSY,
 	R600_QUERY_GPU_SDMA_BUSY,
 	R600_QUERY_GPU_PFP_BUSY,
 	R600_QUERY_GPU_MEQ_BUSY,
 	R600_QUERY_GPU_ME_BUSY,
 	R600_QUERY_GPU_SURF_SYNC_BUSY,
 	R600_QUERY_GPU_CP_DMA_BUSY,
 	R600_QUERY_GPU_SCRATCH_RAM_BUSY,
-	R600_QUERY_GPU_CE_BUSY,
 	R600_QUERY_NUM_COMPILATIONS,
 	R600_QUERY_NUM_SHADERS_CREATED,
 	R600_QUERY_BACK_BUFFER_PS_DRAW_RATIO,
 	R600_QUERY_NUM_SHADER_CACHE_HITS,
 	R600_QUERY_GPIN_ASIC_ID,
 	R600_QUERY_GPIN_NUM_SIMD,
 	R600_QUERY_GPIN_NUM_RB,
 	R600_QUERY_GPIN_NUM_SPI,
 	R600_QUERY_GPIN_NUM_SE,
 
diff --git a/src/gallium/drivers/radeon/radeon_winsys.h b/src/gallium/drivers/radeon/radeon_winsys.h
index 351edcd..7431875 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -450,50 +450,20 @@ struct radeon_winsys {
      * \param flush     Flush callback function associated with the command stream.
      * \param user      User pointer that will be passed to the flush callback.
      */
     struct radeon_winsys_cs *(*cs_create)(struct radeon_winsys_ctx *ctx,
                                           enum ring_type ring_type,
                                           void (*flush)(void *ctx, unsigned flags,
 							struct pipe_fence_handle **fence),
                                           void *flush_ctx);
 
     /**
-     * Add a constant engine IB to a graphics CS. This makes the graphics CS
-     * from "cs_create" a group of two IBs that share a buffer list and are
-     * flushed together.
-     *
-     * The returned constant CS is only a stream for writing packets to the new
-     * IB. Calling other winsys functions with it is not allowed, not even
-     * "cs_destroy".
-     *
-     * In order to add buffers and check memory usage, use the graphics CS.
-     * In order to flush it, use the graphics CS, which will flush both IBs.
-     * Destroying the graphics CS will destroy both of them.
-     *
-     * \param cs  The graphics CS from "cs_create" that will hold the buffer
-     *            list and will be used for flushing.
-     */
-    struct radeon_winsys_cs *(*cs_add_const_ib)(struct radeon_winsys_cs *cs);
-
-     /**
-     * Add a constant engine preamble IB to a graphics CS. This add an extra IB
-     * in similar manner to cs_add_const_ib. This should always be called after
-     * cs_add_const_ib.
-     *
-     * The returned IB is a constant engine IB that only gets flushed if the
-     * context changed.
-     *
-     * \param cs  The graphics CS from "cs_create" that will hold the buffer
-     *            list and will be used for flushing.
-     */
-    struct radeon_winsys_cs *(*cs_add_const_preamble_ib)(struct radeon_winsys_cs *cs);
-    /**
      * Destroy a command stream.
      *
      * \param cs        A command stream to destroy.
      */
     void (*cs_destroy)(struct radeon_winsys_cs *cs);
 
     /**
      * Add a buffer. Each buffer used by a CS must be added using this function.
      *
      * \param cs      Command stream
diff --git a/src/gallium/drivers/radeonsi/si_compute.c b/src/gallium/drivers/radeonsi/si_compute.c
index 5efdd39..c90fb06 100644
--- a/src/gallium/drivers/radeonsi/si_compute.c
+++ b/src/gallium/drivers/radeonsi/si_compute.c
@@ -833,26 +833,22 @@ static void si_launch_grid(
 			continue;
 		}
 		radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx, buffer,
 					  RADEON_USAGE_READWRITE,
 					  RADEON_PRIO_COMPUTE_GLOBAL);
 	}
 
 	if (program->ir_type == PIPE_SHADER_IR_TGSI)
 		si_setup_tgsi_grid(sctx, info);
 
-	si_ce_pre_draw_synchronization(sctx);
-
 	si_emit_dispatch_packets(sctx, info);
 
-	si_ce_post_draw_synchronization(sctx);
-
 	sctx->compute_is_busy = true;
 	sctx->b.num_compute_calls++;
 	if (sctx->cs_shader_state.uses_scratch)
 		sctx->b.num_spill_compute_calls++;
 
 	if (cs_regalloc_hang)
 		sctx->b.flags |= SI_CONTEXT_CS_PARTIAL_FLUSH;
 }
 
 
diff --git a/src/gallium/drivers/radeonsi/si_debug.c b/src/gallium/drivers/radeonsi/si_debug.c
index 5a6d391..740ee63 100644
--- a/src/gallium/drivers/radeonsi/si_debug.c
+++ b/src/gallium/drivers/radeonsi/si_debug.c
@@ -213,60 +213,51 @@ static void si_dump_debug_registers(struct si_context *sctx, FILE *f)
 	si_dump_mmapped_reg(sctx, f, R_008218_CP_CPC_STALLED_STAT1);
 	si_dump_mmapped_reg(sctx, f, R_00821C_CP_CPF_STATUS);
 	si_dump_mmapped_reg(sctx, f, R_008220_CP_CPF_BUSY_STAT);
 	si_dump_mmapped_reg(sctx, f, R_008224_CP_CPF_STALLED_STAT1);
 	fprintf(f, "\n");
 }
 
 static void si_dump_last_ib(struct si_context *sctx, FILE *f)
 {
 	int last_trace_id = -1;
-	int last_ce_trace_id = -1;
 
 	if (!sctx->last_gfx.ib)
 		return;
 
 	if (sctx->last_trace_buf) {
 		/* We are expecting that the ddebug pipe has already
 		 * waited for the context, so this buffer should be idle.
 		 * If the GPU is hung, there is no point in waiting for it.
 		 */
 		uint32_t *map = sctx->b.ws->buffer_map(sctx->last_trace_buf->buf,
 						       NULL,
 						       PIPE_TRANSFER_UNSYNCHRONIZED |
 						       PIPE_TRANSFER_READ);
-		if (map) {
+		if (map)
 			last_trace_id = map[0];
-			last_ce_trace_id = map[1];
-		}
 	}
 
 	if (sctx->init_config)
 		ac_parse_ib(f, sctx->init_config->pm4, sctx->init_config->ndw,
 			    -1, "IB2: Init config", sctx->b.chip_class,
 			    NULL, NULL);
 
 	if (sctx->init_config_gs_rings)
 		ac_parse_ib(f, sctx->init_config_gs_rings->pm4,
 			    sctx->init_config_gs_rings->ndw,
 			    -1, "IB2: Init GS rings", sctx->b.chip_class,
 			    NULL, NULL);
 
 	ac_parse_ib(f, sctx->last_gfx.ib, sctx->last_gfx.num_dw,
 		    last_trace_id, "IB", sctx->b.chip_class,
 		     NULL, NULL);
-
-	if (sctx->last_ce.ib) {
-		ac_parse_ib(f, sctx->last_ce.ib, sctx->last_ce.num_dw,
-			    last_ce_trace_id, "CE IB", sctx->b.chip_class,
-			    NULL, NULL);
-	}
 }
 
 static const char *priority_to_string(enum radeon_bo_priority priority)
 {
 #define ITEM(x) [RADEON_PRIO_##x] = #x
 	static const char *table[64] = {
 		ITEM(FENCE),
 	        ITEM(TRACE),
 	        ITEM(SO_FILLED_SIZE),
 	        ITEM(QUERY),
@@ -847,21 +838,20 @@ static void si_dump_debug_state(struct pipe_context *ctx, FILE *f,
 	}
 
 	if (flags & PIPE_DUMP_LAST_COMMAND_BUFFER) {
 		si_dump_bo_list(sctx, &sctx->last_gfx, f);
 		si_dump_last_ib(sctx, f);
 
 		fprintf(f, "Done.\n");
 
 		/* dump only once */
 		radeon_clear_saved_cs(&sctx->last_gfx);
-		radeon_clear_saved_cs(&sctx->last_ce);
 		r600_resource_reference(&sctx->last_trace_buf, NULL);
 	}
 }
 
 static void si_dump_dma(struct si_context *sctx,
 			struct radeon_saved_cs *saved, FILE *f)
 {
 	static const char ib_name[] = "sDMA IB";
 	unsigned i;
 
diff --git a/src/gallium/drivers/radeonsi/si_descriptors.c b/src/gallium/drivers/radeonsi/si_descriptors.c
index 1e0c422..8db7079 100644
--- a/src/gallium/drivers/radeonsi/si_descriptors.c
+++ b/src/gallium/drivers/radeonsi/si_descriptors.c
@@ -89,206 +89,85 @@ static uint32_t null_texture_descriptor[8] = {
 
 static uint32_t null_image_descriptor[8] = {
 	0,
 	0,
 	0,
 	S_008F1C_TYPE(V_008F1C_SQ_RSRC_IMG_1D)
 	/* the rest must contain zeros, which is also used by the buffer
 	 * descriptor */
 };
 
-static uint16_t si_ce_ram_size(struct si_context *sctx)
-{
-	return sctx->b.chip_class >= GFX9 ? 4096 : 32768;
-}
-
 static void si_init_descriptor_list(uint32_t *desc_list,
 				    unsigned element_dw_size,
 				    unsigned num_elements,
 				    const uint32_t *null_descriptor)
 {
 	int i;
 
 	/* Initialize the array to NULL descriptors if the element size is 8. */
 	if (null_descriptor) {
 		assert(element_dw_size % 8 == 0);
 		for (i = 0; i < num_elements * element_dw_size / 8; i++)
 			memcpy(desc_list + i * 8, null_descriptor, 8 * 4);
 	}
 }
 
-static void si_init_descriptors(struct si_context *sctx,
-				struct si_descriptors *desc,
+static void si_init_descriptors(struct si_descriptors *desc,
 				unsigned shader_userdata_index,
 				unsigned element_dw_size,
-				unsigned num_elements,
-				unsigned first_ce_slot,
-				unsigned num_ce_slots,
-				unsigned *ce_offset)
+				unsigned num_elements)
 {
 	assert(num_elements <= sizeof(desc->dirty_mask)*8);
 
 	desc->list = CALLOC(num_elements, element_dw_size * 4);
 	desc->element_dw_size = element_dw_size;
 	desc->num_elements = num_elements;
-	desc->first_ce_slot = sctx->ce_ib ? first_ce_slot : 0;
-	desc->num_ce_slots = sctx->ce_ib ? num_ce_slots : 0;
 	desc->dirty_mask = u_bit_consecutive64(0, num_elements);
 	desc->shader_userdata_offset = shader_userdata_index * 4;
-
-	if (desc->num_ce_slots) {
-		desc->uses_ce = true;
-		desc->ce_offset = *ce_offset;
-
-		*ce_offset += element_dw_size * desc->num_ce_slots * 4;
-	}
 }
 
 static void si_release_descriptors(struct si_descriptors *desc)
 {
 	r600_resource_reference(&desc->buffer, NULL);
 	FREE(desc->list);
 }
 
-static bool si_ce_upload(struct si_context *sctx, unsigned ce_offset, unsigned size,
-			 unsigned *out_offset, struct r600_resource **out_buf)
-{
-	uint64_t va;
-	unsigned cache_line_size = sctx->screen->b.info.tcc_cache_line_size;
-
-	/* The base and size should be aligned to the L2 cache line size
-	 * for optimal performance. (all dumps should rewrite whole lines)
-	 */
-	size = align(size, cache_line_size);
-
-	(void)si_ce_ram_size; /* silence an "unused" warning */
-	assert(ce_offset + size <= si_ce_ram_size(sctx));
-
-	u_suballocator_alloc(sctx->ce_suballocator, size, cache_line_size,
-			     out_offset, (struct pipe_resource**)out_buf);
-	if (!out_buf)
-			return false;
-
-	va = (*out_buf)->gpu_address + *out_offset;
-
-	radeon_emit(sctx->ce_ib, PKT3(PKT3_DUMP_CONST_RAM, 3, 0));
-	radeon_emit(sctx->ce_ib, ce_offset);
-	radeon_emit(sctx->ce_ib, size / 4);
-	radeon_emit(sctx->ce_ib, va);
-	radeon_emit(sctx->ce_ib, va >> 32);
-
-	radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx, *out_buf,
-	                       RADEON_USAGE_READWRITE, RADEON_PRIO_DESCRIPTORS);
-
-	sctx->ce_need_synchronization = true;
-	return true;
-}
-
-void si_ce_save_all_descriptors_at_ib_end(struct si_context* sctx)
-{
-	bool success = si_ce_upload(sctx, 0, sctx->total_ce_ram_allocated,
-				    &sctx->ce_ram_saved_offset,
-				    &sctx->ce_ram_saved_buffer);
-	(void)success;
-	assert(success);
-}
-
-void si_ce_restore_all_descriptors_at_ib_start(struct si_context *sctx)
-{
-	if (!sctx->ce_ram_saved_buffer)
-		return;
-
-	struct radeon_winsys_cs *ib = sctx->ce_preamble_ib;
-	if (!ib)
-		ib = sctx->ce_ib;
-
-	uint64_t va = sctx->ce_ram_saved_buffer->gpu_address +
-		      sctx->ce_ram_saved_offset;
-
-	radeon_emit(ib, PKT3(PKT3_LOAD_CONST_RAM, 3, 0));
-	radeon_emit(ib, va);
-	radeon_emit(ib, va >> 32);
-	radeon_emit(ib, sctx->total_ce_ram_allocated / 4);
-	radeon_emit(ib, 0);
-
-	radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
-				  sctx->ce_ram_saved_buffer,
-				  RADEON_USAGE_READ, RADEON_PRIO_DESCRIPTORS);
-}
-
-void si_ce_enable_loads(struct radeon_winsys_cs *ib)
-{
-	radeon_emit(ib, PKT3(PKT3_CONTEXT_CONTROL, 1, 0));
-	radeon_emit(ib, CONTEXT_CONTROL_LOAD_ENABLE(1) |
-	                CONTEXT_CONTROL_LOAD_CE_RAM(1));
-	radeon_emit(ib, CONTEXT_CONTROL_SHADOW_ENABLE(1));
-}
-
 static bool si_upload_descriptors(struct si_context *sctx,
 				  struct si_descriptors *desc,
 				  struct r600_atom * atom)
 {
 	unsigned slot_size = desc->element_dw_size * 4;
 	unsigned first_slot_offset = desc->first_active_slot * slot_size;
 	unsigned upload_size = desc->num_active_slots * slot_size;
 
 	/* Skip the upload if no shader is using the descriptors. dirty_mask
 	 * will stay dirty and the descriptors will be uploaded when there is
 	 * a shader using them.
 	 */
 	if (!upload_size)
 		return true;
 
-	if (desc->uses_ce) {
-		const uint32_t *list = desc->list +
-				       desc->first_ce_slot * desc->element_dw_size;
-		uint64_t mask = (desc->dirty_mask >> desc->first_ce_slot) &
-				u_bit_consecutive64(0, desc->num_ce_slots);
-
-
-		while (mask) {
-			int begin, count;
-			u_bit_scan_consecutive_range64(&mask, &begin, &count);
-
-			begin *= desc->element_dw_size;
-			count *= desc->element_dw_size;
-
-			radeon_emit(sctx->ce_ib,
-			            PKT3(PKT3_WRITE_CONST_RAM, count, 0));
-			radeon_emit(sctx->ce_ib, desc->ce_offset + begin * 4);
-			radeon_emit_array(sctx->ce_ib, list + begin, count);
-		}
-
-		if (!si_ce_upload(sctx,
-				  desc->ce_offset +
-				  (first_slot_offset - desc->first_ce_slot * slot_size),
-				  upload_size, (unsigned*)&desc->buffer_offset,
-				  &desc->buffer))
-			return false;
-	} else {
-		uint32_t *ptr;
-
-		u_upload_alloc(sctx->b.b.const_uploader, 0, upload_size,
-			       si_optimal_tcc_alignment(sctx, upload_size),
-			       (unsigned*)&desc->buffer_offset,
-			       (struct pipe_resource**)&desc->buffer,
-			       (void**)&ptr);
-		if (!desc->buffer)
-			return false; /* skip the draw call */
+	uint32_t *ptr;
+	u_upload_alloc(sctx->b.b.const_uploader, 0, upload_size,
+		       si_optimal_tcc_alignment(sctx, upload_size),
+		       (unsigned*)&desc->buffer_offset,
+		       (struct pipe_resource**)&desc->buffer,
+		       (void**)&ptr);
+	if (!desc->buffer)
+		return false; /* skip the draw call */
 
-		util_memcpy_cpu_to_le32(ptr, (char*)desc->list + first_slot_offset,
-					upload_size);
-		desc->gpu_list = ptr - first_slot_offset / 4;
+	util_memcpy_cpu_to_le32(ptr, (char*)desc->list + first_slot_offset,
+				upload_size);
+	desc->gpu_list = ptr - first_slot_offset / 4;
 
-		radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx, desc->buffer,
-	                            RADEON_USAGE_READ, RADEON_PRIO_DESCRIPTORS);
-	}
+	radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx, desc->buffer,
+                            RADEON_USAGE_READ, RADEON_PRIO_DESCRIPTORS);
 
 	/* The shader pointer should point to slot 0. */
 	desc->buffer_offset -= first_slot_offset;
 
 	desc->dirty_mask = 0;
 
 	if (atom)
 		si_mark_atom_dirty(sctx, atom);
 
 	return true;
@@ -982,41 +861,36 @@ static void si_bind_sampler_states(struct pipe_context *ctx,
 			continue;
 
 		memcpy(desc->list + desc_slot * 16 + 12, sstates[i]->val, 4*4);
 		desc->dirty_mask |= 1ull << desc_slot;
 		sctx->descriptors_dirty |= 1u << si_sampler_and_image_descriptors_idx(shader);
 	}
 }
 
 /* BUFFER RESOURCES */
 
-static void si_init_buffer_resources(struct si_context *sctx,
-				     struct si_buffer_resources *buffers,
+static void si_init_buffer_resources(struct si_buffer_resources *buffers,
 				     struct si_descriptors *descs,
 				     unsigned num_buffers,
-				     unsigned first_ce_slot,
-				     unsigned num_ce_slots,
 				     unsigned shader_userdata_index,
 				     enum radeon_bo_usage shader_usage,
 				     enum radeon_bo_usage shader_usage_constbuf,
 				     enum radeon_bo_priority priority,
-				     enum radeon_bo_priority priority_constbuf,
-				     unsigned *ce_offset)
+				     enum radeon_bo_priority priority_constbuf)
 {
 	buffers->shader_usage = shader_usage;
 	buffers->shader_usage_constbuf = shader_usage_constbuf;
 	buffers->priority = priority;
 	buffers->priority_constbuf = priority_constbuf;
 	buffers->buffers = CALLOC(num_buffers, sizeof(struct pipe_resource*));
 
-	si_init_descriptors(sctx, descs, shader_userdata_index, 4, num_buffers,
-			    first_ce_slot, num_ce_slots, ce_offset);
+	si_init_descriptors(descs, shader_userdata_index, 4, num_buffers);
 }
 
 static void si_release_buffer_resources(struct si_buffer_resources *buffers,
 					struct si_descriptors *descs)
 {
 	int i;
 
 	for (i = 0; i < descs->num_elements; i++) {
 		pipe_resource_reference(&buffers->buffers[i], NULL);
 	}
@@ -2730,147 +2604,73 @@ void si_all_resident_buffers_begin_new_cs(struct si_context *sctx)
 					   RADEON_USAGE_READWRITE,
 					   false, false);
 	}
 
 	sctx->b.num_resident_handles += num_resident_tex_handles +
 					num_resident_img_handles;
 }
 
 /* INIT/DEINIT/UPLOAD */
 
-/* GFX9 has only 4KB of CE, while previous chips had 32KB. In order
- * to make CE RAM as useful as possible, this defines limits
- * for the number slots that can be in CE RAM on GFX9. If a shader
- * is using more, descriptors will be uploaded to memory directly and
- * CE won't be used.
- *
- * These numbers are based on shader-db.
- */
-static unsigned gfx9_max_ce_samplers[SI_NUM_SHADERS] = {
-	[PIPE_SHADER_VERTEX] = 0,
-	[PIPE_SHADER_TESS_CTRL] = 0,
-	[PIPE_SHADER_TESS_EVAL] = 1,
-	[PIPE_SHADER_GEOMETRY] = 0,
-	[PIPE_SHADER_FRAGMENT] = 24,
-	[PIPE_SHADER_COMPUTE] = 16,
-};
-static unsigned gfx9_max_ce_images[SI_NUM_SHADERS] = {
-	/* these must be even due to slot alignment */
-	[PIPE_SHADER_VERTEX] = 0,
-	[PIPE_SHADER_TESS_CTRL] = 0,
-	[PIPE_SHADER_TESS_EVAL] = 0,
-	[PIPE_SHADER_GEOMETRY] = 0,
-	[PIPE_SHADER_FRAGMENT] = 2,
-	[PIPE_SHADER_COMPUTE] = 8,
-};
-static unsigned gfx9_max_ce_const_buffers[SI_NUM_SHADERS] = {
-	[PIPE_SHADER_VERTEX] = 9,
-	[PIPE_SHADER_TESS_CTRL] = 3,
-	[PIPE_SHADER_TESS_EVAL] = 5,
-	[PIPE_SHADER_GEOMETRY] = 0,
-	[PIPE_SHADER_FRAGMENT] = 8,
-	[PIPE_SHADER_COMPUTE] = 6,
-};
-static unsigned gfx9_max_ce_shader_buffers[SI_NUM_SHADERS] = {
-	[PIPE_SHADER_VERTEX] = 0,
-	[PIPE_SHADER_TESS_CTRL] = 0,
-	[PIPE_SHADER_TESS_EVAL] = 0,
-	[PIPE_SHADER_GEOMETRY] = 0,
-	[PIPE_SHADER_FRAGMENT] = 12,
-	[PIPE_SHADER_COMPUTE] = 13,
-};
-
 void si_init_all_descriptors(struct si_context *sctx)
 {
 	int i;
-	unsigned ce_offset = 0;
 
 	STATIC_ASSERT(GFX9_SGPR_TCS_CONST_AND_SHADER_BUFFERS % 2 == 0);
 	STATIC_ASSERT(GFX9_SGPR_GS_CONST_AND_SHADER_BUFFERS % 2 == 0);
 
 	for (i = 0; i < SI_NUM_SHADERS; i++) {
 		bool gfx9_tcs = false;
 		bool gfx9_gs = false;
 		unsigned num_sampler_slots = SI_NUM_IMAGES / 2 + SI_NUM_SAMPLERS;
 		unsigned num_buffer_slots = SI_NUM_SHADER_BUFFERS + SI_NUM_CONST_BUFFERS;
 
-		unsigned first_sampler_ce_slot = 0;
-		unsigned num_sampler_ce_slots = num_sampler_slots;
-
-		unsigned first_buffer_ce_slot = 0;
-		unsigned num_buffer_ce_slots = num_buffer_slots;
-
-		/* Adjust CE slot ranges based on GFX9 CE RAM limits. */
-		if (sctx->b.chip_class >= GFX9) {
-			gfx9_tcs = i == PIPE_SHADER_TESS_CTRL;
-			gfx9_gs = i == PIPE_SHADER_GEOMETRY;
-
-			first_sampler_ce_slot =
-				si_get_image_slot(gfx9_max_ce_images[i] - 1) / 2;
-			num_sampler_ce_slots = gfx9_max_ce_images[i] / 2 +
-					       gfx9_max_ce_samplers[i];
-
-			first_buffer_ce_slot =
-				si_get_shaderbuf_slot(gfx9_max_ce_shader_buffers[i] - 1);
-			num_buffer_ce_slots = gfx9_max_ce_shader_buffers[i] +
-					      gfx9_max_ce_const_buffers[i];
-		}
-
-		si_init_buffer_resources(sctx, &sctx->const_and_shader_buffers[i],
+		si_init_buffer_resources(&sctx->const_and_shader_buffers[i],
 					 si_const_and_shader_buffer_descriptors(sctx, i),
 					 num_buffer_slots,
-					 first_buffer_ce_slot, num_buffer_ce_slots,
 					 gfx9_tcs ? GFX9_SGPR_TCS_CONST_AND_SHADER_BUFFERS :
 					 gfx9_gs ? GFX9_SGPR_GS_CONST_AND_SHADER_BUFFERS :
 						   SI_SGPR_CONST_AND_SHADER_BUFFERS,
 					 RADEON_USAGE_READWRITE,
 					 RADEON_USAGE_READ,
 					 RADEON_PRIO_SHADER_RW_BUFFER,
-					 RADEON_PRIO_CONST_BUFFER,
-					 &ce_offset);
+					 RADEON_PRIO_CONST_BUFFER);
 
 		struct si_descriptors *desc = si_sampler_and_image_descriptors(sctx, i);
-		si_init_descriptors(sctx, desc,
+		si_init_descriptors(desc,
 				    gfx9_tcs ? GFX9_SGPR_TCS_SAMPLERS_AND_IMAGES :
 				    gfx9_gs ? GFX9_SGPR_GS_SAMPLERS_AND_IMAGES :
 					      SI_SGPR_SAMPLERS_AND_IMAGES,
-				    16, num_sampler_slots,
-				    first_sampler_ce_slot, num_sampler_ce_slots,
-				    &ce_offset);
+				    16, num_sampler_slots);
 
 		int j;
 		for (j = 0; j < SI_NUM_IMAGES; j++)
 			memcpy(desc->list + j * 8, null_image_descriptor, 8 * 4);
 		for (; j < SI_NUM_IMAGES + SI_NUM_SAMPLERS * 2; j++)
 			memcpy(desc->list + j * 8, null_texture_descriptor, 8 * 4);
 	}
 
-	si_init_buffer_resources(sctx, &sctx->rw_buffers,
+	si_init_buffer_resources(&sctx->rw_buffers,
 				 &sctx->descriptors[SI_DESCS_RW_BUFFERS],
-				 SI_NUM_RW_BUFFERS, 0, SI_NUM_RW_BUFFERS,
-				 SI_SGPR_RW_BUFFERS,
+				 SI_NUM_RW_BUFFERS, SI_SGPR_RW_BUFFERS,
 				 /* The second set of usage/priority is used by
 				  * const buffers in RW buffer slots. */
 				 RADEON_USAGE_READWRITE, RADEON_USAGE_READ,
-				 RADEON_PRIO_SHADER_RINGS, RADEON_PRIO_CONST_BUFFER,
-				 &ce_offset);
+				 RADEON_PRIO_SHADER_RINGS, RADEON_PRIO_CONST_BUFFER);
 	sctx->descriptors[SI_DESCS_RW_BUFFERS].num_active_slots = SI_NUM_RW_BUFFERS;
 
-	si_init_descriptors(sctx, &sctx->vertex_buffers, SI_SGPR_VERTEX_BUFFERS,
-			    4, SI_NUM_VERTEX_BUFFERS, 0, 0, NULL);
+	si_init_descriptors(&sctx->vertex_buffers, SI_SGPR_VERTEX_BUFFERS,
+			    4, SI_NUM_VERTEX_BUFFERS);
 	FREE(sctx->vertex_buffers.list); /* not used */
 	sctx->vertex_buffers.list = NULL;
 
 	sctx->descriptors_dirty = u_bit_consecutive(0, SI_NUM_DESCS);
-	sctx->total_ce_ram_allocated = ce_offset;
-
-	assert(ce_offset <= si_ce_ram_size(sctx));
 
 	/* Set pipe_context functions. */
 	sctx->b.b.bind_sampler_states = si_bind_sampler_states;
 	sctx->b.b.set_shader_images = si_set_shader_images;
 	sctx->b.b.set_constant_buffer = si_pipe_set_constant_buffer;
 	sctx->b.b.set_polygon_stipple = si_set_polygon_stipple;
 	sctx->b.b.set_shader_buffers = si_set_shader_buffers;
 	sctx->b.b.set_sampler_views = si_set_sampler_views;
 	sctx->b.b.set_stream_output_targets = si_set_streamout_targets;
 	sctx->b.b.create_texture_handle = si_create_texture_handle;
@@ -3005,40 +2805,20 @@ void si_set_active_descriptors(struct si_context *sctx, unsigned desc_idx,
 
 	int first, count;
 	u_bit_scan_consecutive_range64(&new_active_mask, &first, &count);
 	assert(new_active_mask == 0);
 
 	/* Upload/dump descriptors if slots are being enabled. */
 	if (first < desc->first_active_slot ||
 	    first + count > desc->first_active_slot + desc->num_active_slots)
 		sctx->descriptors_dirty |= 1u << desc_idx;
 
-	/* Enable or disable CE for this descriptor array. */
-	bool used_ce = desc->uses_ce;
-	desc->uses_ce = desc->first_ce_slot <= first &&
-			desc->first_ce_slot + desc->num_ce_slots >= first + count;
-
-	if (desc->uses_ce != used_ce) {
-		/* Upload or dump descriptors if we're disabling or enabling CE,
-		 * respectively. */
-		sctx->descriptors_dirty |= 1u << desc_idx;
-
-		/* If we're enabling CE, re-upload all descriptors to CE RAM.
-		 * When CE was disabled, uploads to CE RAM stopped.
-		 */
-		if (desc->uses_ce) {
-			desc->dirty_mask |=
-				u_bit_consecutive64(desc->first_ce_slot,
-						    desc->num_ce_slots);
-		}
-	}
-
 	desc->first_active_slot = first;
 	desc->num_active_slots = count;
 }
 
 void si_set_active_descriptors_for_shader(struct si_context *sctx,
 					  struct si_shader_selector *sel)
 {
 	if (!sel)
 		return;
 
diff --git a/src/gallium/drivers/radeonsi/si_hw_context.c b/src/gallium/drivers/radeonsi/si_hw_context.c
index d9170c3..20063b8 100644
--- a/src/gallium/drivers/radeonsi/si_hw_context.c
+++ b/src/gallium/drivers/radeonsi/si_hw_context.c
@@ -20,55 +20,24 @@
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors:
  *      Jerome Glisse
  */
 
 #include "si_pipe.h"
 #include "radeon/r600_cs.h"
 
-static unsigned si_descriptor_list_cs_space(unsigned count, unsigned element_size)
-{
-	/* Ensure we have enough space to start a new range in a hole */
-	assert(element_size >= 3);
-
-	/* 5 dwords for write to L2 + 3 bytes for the packet header of
-	 * every disjoint range written to CE RAM.
-	 */
-	return 5 + (3 * count / 2) + count * element_size;
-}
-
-static unsigned si_ce_needed_cs_space(void)
-{
-	unsigned space = 0;
-
-	space += si_descriptor_list_cs_space(SI_NUM_SHADER_BUFFERS +
-					     SI_NUM_CONST_BUFFERS, 4);
-	/* two 8-byte images share one 16-byte slot */
-	space += si_descriptor_list_cs_space(SI_NUM_IMAGES / 2 +
-					     SI_NUM_SAMPLERS, 16);
-	space *= SI_NUM_SHADERS;
-
-	space += si_descriptor_list_cs_space(SI_NUM_RW_BUFFERS, 4);
-
-	/* Increment CE counter packet */
-	space += 2;
-
-	return space;
-}
-
 /* initialize */
 void si_need_cs_space(struct si_context *ctx)
 {
 	struct radeon_winsys_cs *cs = ctx->b.gfx.cs;
-	struct radeon_winsys_cs *ce_ib = ctx->ce_ib;
 
 	/* There is no need to flush the DMA IB here, because
 	 * r600_need_dma_space always flushes the GFX IB if there is
 	 * a conflict, which means any unflushed DMA commands automatically
 	 * precede the GFX IB (= they had no dependency on the GFX IB when
 	 * they were submitted).
 	 */
 
 	/* There are two memory usage counters in the winsys for all buffers
 	 * that have been added (cs_add_buffer) and two counters in the pipe
@@ -80,22 +49,21 @@ void si_need_cs_space(struct si_context *ctx)
 		ctx->b.vram = 0;
 		ctx->b.gfx.flush(ctx, RADEON_FLUSH_ASYNC, NULL);
 		return;
 	}
 	ctx->b.gtt = 0;
 	ctx->b.vram = 0;
 
 	/* If the CS is sufficiently large, don't count the space needed
 	 * and just flush if there is not enough space left.
 	 */
-	if (!ctx->b.ws->cs_check_space(cs, 2048) ||
-	    (ce_ib && !ctx->b.ws->cs_check_space(ce_ib, si_ce_needed_cs_space())))
+	if (!ctx->b.ws->cs_check_space(cs, 2048))
 		ctx->b.gfx.flush(ctx, RADEON_FLUSH_ASYNC, NULL);
 }
 
 void si_context_gfx_flush(void *context, unsigned flags,
 			  struct pipe_fence_handle **fence)
 {
 	struct si_context *ctx = context;
 	struct radeon_winsys_cs *cs = ctx->b.gfx.cs;
 	struct radeon_winsys *ws = ctx->b.ws;
 
@@ -116,45 +84,39 @@ void si_context_gfx_flush(void *context, unsigned flags,
 	 * This code is only needed when the driver flushes the GFX IB
 	 * internally, and it never asks for a fence handle.
 	 */
 	if (radeon_emitted(ctx->b.dma.cs, 0)) {
 		assert(fence == NULL); /* internal flushes only */
 		ctx->b.dma.flush(ctx, flags, NULL);
 	}
 
 	ctx->gfx_flush_in_progress = true;
 
-	/* This CE dump should be done in parallel with the last draw. */
-	if (ctx->ce_ib)
-		si_ce_save_all_descriptors_at_ib_end(ctx);
-
 	r600_preflush_suspend_features(&ctx->b);
 
 	ctx->b.flags |= SI_CONTEXT_CS_PARTIAL_FLUSH |
 			SI_CONTEXT_PS_PARTIAL_FLUSH;
 
 	/* DRM 3.1.0 doesn't flush TC for VI correctly. */
 	if (ctx->b.chip_class == VI && ctx->b.screen->info.drm_minor <= 1)
 		ctx->b.flags |= SI_CONTEXT_INV_GLOBAL_L2 |
 				SI_CONTEXT_INV_VMEM_L1;
 
 	si_emit_cache_flush(ctx);
 
 	if (ctx->trace_buf)
 		si_trace_emit(ctx);
 
 	if (ctx->is_debug) {
 		/* Save the IB for debug contexts. */
 		radeon_clear_saved_cs(&ctx->last_gfx);
 		radeon_save_cs(ws, cs, &ctx->last_gfx, true);
-		radeon_clear_saved_cs(&ctx->last_ce);
-		radeon_save_cs(ws, ctx->ce_ib, &ctx->last_ce, false);
 		r600_resource_reference(&ctx->last_trace_buf, ctx->trace_buf);
 		r600_resource_reference(&ctx->trace_buf, NULL);
 	}
 
 	/* Flush the CS. */
 	ws->cs_flush(cs, flags, &ctx->b.last_gfx_fence);
 	if (fence)
 		ws->fence_reference(fence, ctx->b.last_gfx_fence);
 	ctx->b.num_gfx_cs_flushes++;
 
@@ -168,27 +130,27 @@ void si_context_gfx_flush(void *context, unsigned flags,
 		si_check_vm_faults(&ctx->b, &ctx->last_gfx, RING_GFX);
 	}
 
 	si_begin_new_cs(ctx);
 	ctx->gfx_flush_in_progress = false;
 }
 
 void si_begin_new_cs(struct si_context *ctx)
 {
 	if (ctx->is_debug) {
-		static const uint32_t zeros[2];
+		static const uint32_t zeros[1];
 
 		/* Create a buffer used for writing trace IDs and initialize it to 0. */
 		assert(!ctx->trace_buf);
 		ctx->trace_buf = (struct r600_resource*)
 				 pipe_buffer_create(ctx->b.b.screen, 0,
-						    PIPE_USAGE_STAGING, 8);
+						    PIPE_USAGE_STAGING, 4);
 		if (ctx->trace_buf)
 			pipe_buffer_write_nooverlap(&ctx->b.b, &ctx->trace_buf->b.b,
 						    0, sizeof(zeros), zeros);
 		ctx->trace_id = 0;
 	}
 
 	if (ctx->trace_buf)
 		si_trace_emit(ctx);
 
 	/* Flush read caches at the beginning of CS not flushed by the kernel. */
@@ -201,28 +163,20 @@ void si_begin_new_cs(struct si_context *ctx)
 	/* set all valid group as dirty so they get reemited on
 	 * next draw command
 	 */
 	si_pm4_reset_emitted(ctx);
 
 	/* The CS initialization should be emitted before everything else. */
 	si_pm4_emit(ctx, ctx->init_config);
 	if (ctx->init_config_gs_rings)
 		si_pm4_emit(ctx, ctx->init_config_gs_rings);
 
-	if (ctx->ce_preamble_ib)
-		si_ce_enable_loads(ctx->ce_preamble_ib);
-	else if (ctx->ce_ib)
-		si_ce_enable_loads(ctx->ce_ib);
-
-	if (ctx->ce_ib)
-		si_ce_restore_all_descriptors_at_ib_start(ctx);
-
 	if (ctx->queued.named.ls)
 		ctx->prefetch_L2_mask |= SI_PREFETCH_LS;
 	if (ctx->queued.named.hs)
 		ctx->prefetch_L2_mask |= SI_PREFETCH_HS;
 	if (ctx->queued.named.es)
 		ctx->prefetch_L2_mask |= SI_PREFETCH_ES;
 	if (ctx->queued.named.gs)
 		ctx->prefetch_L2_mask |= SI_PREFETCH_GS;
 	if (ctx->queued.named.vs)
 		ctx->prefetch_L2_mask |= SI_PREFETCH_VS;
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 80a77a8..82f0c58 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -47,24 +47,20 @@ static void si_destroy_context(struct pipe_context *context)
 
 	/* Unreference the framebuffer normally to disable related logic
 	 * properly.
 	 */
 	struct pipe_framebuffer_state fb = {};
 	if (context->set_framebuffer_state)
 		context->set_framebuffer_state(context, &fb);
 
 	si_release_all_descriptors(sctx);
 
-	if (sctx->ce_suballocator)
-		u_suballocator_destroy(sctx->ce_suballocator);
-
-	r600_resource_reference(&sctx->ce_ram_saved_buffer, NULL);
 	pipe_resource_reference(&sctx->esgs_ring, NULL);
 	pipe_resource_reference(&sctx->gsvs_ring, NULL);
 	pipe_resource_reference(&sctx->tf_ring, NULL);
 	pipe_resource_reference(&sctx->tess_offchip_ring, NULL);
 	pipe_resource_reference(&sctx->null_const_buf.buffer, NULL);
 	r600_resource_reference(&sctx->border_color_buffer, NULL);
 	free(sctx->border_color_table);
 	r600_resource_reference(&sctx->scratch_buffer, NULL);
 	r600_resource_reference(&sctx->compute_scratch_buffer, NULL);
 	r600_resource_reference(&sctx->wait_mem_scratch, NULL);
@@ -193,59 +189,20 @@ static struct pipe_context *si_create_context(struct pipe_screen *screen,
 	if (sscreen->b.info.has_hw_decode) {
 		sctx->b.b.create_video_codec = si_uvd_create_decoder;
 		sctx->b.b.create_video_buffer = si_video_buffer_create;
 	} else {
 		sctx->b.b.create_video_codec = vl_create_decoder;
 		sctx->b.b.create_video_buffer = vl_video_buffer_create;
 	}
 
 	sctx->b.gfx.cs = ws->cs_create(sctx->b.ctx, RING_GFX,
 				       si_context_gfx_flush, sctx);
-
-	bool enable_ce = sscreen->b.chip_class != SI && /* SI hangs */
-			 /* These can't use CE due to a power gating bug in the kernel. */
-			 sscreen->b.family != CHIP_CARRIZO &&
-			 sscreen->b.family != CHIP_STONEY;
-
-	/* CE is currently disabled by default, because it makes s_load latency
-	 * worse, because CE IB doesn't run in lockstep with DE.
-	 * Remove this line after that performance issue has been resolved.
-	 */
-	enable_ce = false;
-
-	/* Apply CE overrides. */
-	if (sscreen->b.debug_flags & DBG_NO_CE)
-		enable_ce = false;
-	else if (sscreen->b.debug_flags & DBG_CE)
-		enable_ce = true;
-
-	if (ws->cs_add_const_ib && enable_ce) {
-		sctx->ce_ib = ws->cs_add_const_ib(sctx->b.gfx.cs);
-		if (!sctx->ce_ib)
-			goto fail;
-
-		if (ws->cs_add_const_preamble_ib) {
-			sctx->ce_preamble_ib =
-			           ws->cs_add_const_preamble_ib(sctx->b.gfx.cs);
-
-			if (!sctx->ce_preamble_ib)
-				goto fail;
-		}
-
-		sctx->ce_suballocator =
-			u_suballocator_create(&sctx->b.b, 1024 * 1024, 0,
-					      PIPE_USAGE_DEFAULT,
-					      R600_RESOURCE_FLAG_UNMAPPABLE, false);
-		if (!sctx->ce_suballocator)
-			goto fail;
-	}
-
 	sctx->b.gfx.flush = si_context_gfx_flush;
 
 	/* Border colors. */
 	sctx->border_color_table = malloc(SI_MAX_BORDER_COLORS *
 					  sizeof(*sctx->border_color_table));
 	if (!sctx->border_color_table)
 		goto fail;
 
 	sctx->border_color_buffer = (struct r600_resource*)
 		pipe_buffer_create(screen, 0, PIPE_USAGE_DEFAULT,
diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h
index 8d82287..bb5e189 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -274,29 +274,21 @@ struct si_context {
 	void				*custom_dsa_flush;
 	void				*custom_blend_resolve;
 	void				*custom_blend_fmask_decompress;
 	void				*custom_blend_eliminate_fastclear;
 	void				*custom_blend_dcc_decompress;
 	struct si_screen		*screen;
 	LLVMTargetMachineRef		tm; /* only non-threaded compilation */
 	struct si_shader_ctx_state	fixed_func_tcs_shader;
 	struct r600_resource		*wait_mem_scratch;
 	unsigned			wait_mem_number;
-
-	struct radeon_winsys_cs		*ce_ib;
-	struct radeon_winsys_cs		*ce_preamble_ib;
-	struct r600_resource		*ce_ram_saved_buffer;
-	struct u_suballocator		*ce_suballocator;
-	unsigned			ce_ram_saved_offset;
-	uint16_t			total_ce_ram_allocated;
 	uint16_t			prefetch_L2_mask;
-	bool				ce_need_synchronization:1;
 
 	bool				gfx_flush_in_progress:1;
 	bool				compute_is_busy:1;
 
 	/* Atoms (direct states). */
 	union si_state_atoms		atoms;
 	unsigned			dirty_atoms; /* mask */
 	/* PM4 states (precomputed immutable states) */
 	unsigned			dirty_states;
 	union si_state			queued;
@@ -413,21 +405,20 @@ struct si_context {
 	struct si_shader	*last_ls;
 	struct si_shader_selector *last_tcs;
 	int			last_num_tcs_input_cp;
 	int			last_tes_sh_base;
 	bool			last_tess_uses_primid;
 	unsigned		last_num_patches;
 
 	/* Debug state. */
 	bool			is_debug;
 	struct radeon_saved_cs	last_gfx;
-	struct radeon_saved_cs	last_ce;
 	struct r600_resource	*last_trace_buf;
 	struct r600_resource	*trace_buf;
 	unsigned		trace_id;
 	uint64_t		dmesg_timestamp;
 	unsigned		apitrace_call_number;
 
 	/* Other state */
 	bool need_check_render_feedback;
 	bool			decompression_enabled;
 
diff --git a/src/gallium/drivers/radeonsi/si_state.h b/src/gallium/drivers/radeonsi/si_state.h
index bce4066..fd95aa0 100644
--- a/src/gallium/drivers/radeonsi/si_state.h
+++ b/src/gallium/drivers/radeonsi/si_state.h
@@ -229,41 +229,28 @@ struct si_descriptors {
 
 	/* The buffer where the descriptors have been uploaded. */
 	struct r600_resource *buffer;
 	int buffer_offset; /* can be negative if not using lower slots */
 
 	/* The size of one descriptor. */
 	ubyte element_dw_size;
 	/* The maximum number of descriptors. */
 	ubyte num_elements;
 
-	/* Offset in CE RAM */
-	uint16_t ce_offset;
-
-	/* Slots allocated in CE RAM. If we get active slots outside of this
-	 * range, direct uploads to memory will be used instead. This basically
-	 * governs switching between onchip (CE) and offchip (upload) modes.
-	 */
-	ubyte first_ce_slot;
-	ubyte num_ce_slots;
-
 	/* Slots that are used by currently-bound shaders.
 	 * With CE: It determines which slots are dumped to L2.
 	 *          It doesn't skip uploads to CE RAM.
 	 * Without CE: It determines which slots are uploaded.
 	 */
 	ubyte first_active_slot;
 	ubyte num_active_slots;
 
-	/* Whether CE is used to upload this descriptor array. */
-	bool uses_ce;
-
 	/* The SGPR index where the 64-bit pointer to the descriptor array will
 	 * be stored. */
 	ubyte shader_userdata_offset;
 };
 
 struct si_sampler_views {
 	struct pipe_sampler_view	*views[SI_NUM_SAMPLERS];
 	struct si_sampler_state		*sampler_states[SI_NUM_SAMPLERS];
 
 	/* The i-th bit is set if that element is enabled (non-NULL resource). */
@@ -300,23 +287,20 @@ struct si_buffer_resources {
 #define si_pm4_delete_state(sctx, member, value) \
 	do { \
 		if ((sctx)->queued.named.member == (value)) { \
 			(sctx)->queued.named.member = NULL; \
 		} \
 		si_pm4_free_state(sctx, (struct si_pm4_state *)(value), \
 				  si_pm4_block_idx(member)); \
 	} while(0)
 
 /* si_descriptors.c */
-void si_ce_save_all_descriptors_at_ib_end(struct si_context* sctx);
-void si_ce_restore_all_descriptors_at_ib_start(struct si_context *sctx);
-void si_ce_enable_loads(struct radeon_winsys_cs *ib);
 void si_set_mutable_tex_desc_fields(struct si_screen *sscreen,
 				    struct r600_texture *tex,
 				    const struct legacy_surf_level *base_level_info,
 				    unsigned base_level, unsigned first_level,
 				    unsigned block_width, bool is_stencil,
 				    uint32_t *state);
 void si_get_pipe_constant_buffer(struct si_context *sctx, uint shader,
 				 uint slot, struct pipe_constant_buffer *cbuf);
 void si_get_shader_buffers(struct si_context *sctx,
 			   enum pipe_shader_type shader,
@@ -394,22 +378,20 @@ void si_init_shader_functions(struct si_context *sctx);
 bool si_init_shader_cache(struct si_screen *sscreen);
 void si_destroy_shader_cache(struct si_screen *sscreen);
 void si_init_shader_selector_async(void *job, int thread_index);
 void si_get_active_slot_masks(const struct tgsi_shader_info *info,
 			      uint32_t *const_and_shader_buffers,
 			      uint64_t *samplers_and_images);
 
 /* si_state_draw.c */
 void si_init_ia_multi_vgt_param_table(struct si_context *sctx);
 void si_emit_cache_flush(struct si_context *sctx);
-void si_ce_pre_draw_synchronization(struct si_context *sctx);
-void si_ce_post_draw_synchronization(struct si_context *sctx);
 void si_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *dinfo);
 void si_trace_emit(struct si_context *sctx);
 
 
 static inline unsigned
 si_tile_mode_index(struct r600_texture *rtex, unsigned level, bool stencil)
 {
 	if (stencil)
 		return rtex->surface.u.legacy.stencil_tiling_index[level];
 	else
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index a26e38d..db8f77d 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -1137,41 +1137,20 @@ static void si_get_draw_start_count(struct si_context *sctx,
 			*count = end - begin;
 		} else {
 			*start = *count = 0;
 		}
 	} else {
 		*start = info->start;
 		*count = info->count;
 	}
 }
 
-void si_ce_pre_draw_synchronization(struct si_context *sctx)
-{
-	if (sctx->ce_need_synchronization) {
-		radeon_emit(sctx->ce_ib, PKT3(PKT3_INCREMENT_CE_COUNTER, 0, 0));
-		radeon_emit(sctx->ce_ib, 1); /* 1 = increment CE counter */
-
-		radeon_emit(sctx->b.gfx.cs, PKT3(PKT3_WAIT_ON_CE_COUNTER, 0, 0));
-		radeon_emit(sctx->b.gfx.cs, 0); /* 0 = don't flush sL1 conditionally */
-	}
-}
-
-void si_ce_post_draw_synchronization(struct si_context *sctx)
-{
-	if (sctx->ce_need_synchronization) {
-		radeon_emit(sctx->b.gfx.cs, PKT3(PKT3_INCREMENT_DE_COUNTER, 0, 0));
-		radeon_emit(sctx->b.gfx.cs, 0); /* unused */
-
-		sctx->ce_need_synchronization = false;
-	}
-}
-
 static void si_emit_all_states(struct si_context *sctx, const struct pipe_draw_info *info,
 			       unsigned skip_atom_mask)
 {
 	/* Emit state atoms. */
 	unsigned mask = sctx->dirty_atoms & ~skip_atom_mask;
 	while (mask) {
 		struct r600_atom *atom = sctx->atoms.array[u_bit_scan(&mask)];
 
 		atom->emit(&sctx->b, atom);
 	}
@@ -1402,21 +1381,20 @@ void si_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info)
 		/* <-- CUs are idle here. */
 		if (!si_upload_graphics_shader_descriptors(sctx))
 			return;
 
 		/* Set shader pointers after descriptors are uploaded. */
 		if (si_is_atom_dirty(sctx, shader_pointers)) {
 			shader_pointers->emit(&sctx->b, NULL);
 			sctx->dirty_atoms = 0;
 		}
 
-		si_ce_pre_draw_synchronization(sctx);
 		si_emit_draw_packets(sctx, info, indexbuf, index_size, index_offset);
 		/* <-- CUs are busy here. */
 
 		/* Start prefetches after the draw has been started. Both will run
 		 * in parallel, but starting the draw first is more important.
 		 */
 		if (sctx->b.chip_class >= CIK && sctx->prefetch_L2_mask)
 			cik_emit_prefetch_L2(sctx);
 	} else {
 		/* If we don't wait for idle, start prefetches first, then set
@@ -1425,26 +1403,23 @@ void si_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info)
 		if (sctx->b.flags)
 			si_emit_cache_flush(sctx);
 
 		if (sctx->b.chip_class >= CIK && sctx->prefetch_L2_mask)
 			cik_emit_prefetch_L2(sctx);
 
 		if (!si_upload_graphics_shader_descriptors(sctx))
 			return;
 
 		si_emit_all_states(sctx, info, 0);
-		si_ce_pre_draw_synchronization(sctx);
 		si_emit_draw_packets(sctx, info, indexbuf, index_size, index_offset);
 	}
 
-	si_ce_post_draw_synchronization(sctx);
-
 	if (sctx->trace_buf)
 		si_trace_emit(sctx);
 
 	/* Workaround for a VGT hang when streamout is enabled.
 	 * It must be done after drawing. */
 	if ((sctx->b.family == CHIP_HAWAII ||
 	     sctx->b.family == CHIP_TONGA ||
 	     sctx->b.family == CHIP_FIJI) &&
 	    r600_get_strmout_en(&sctx->b)) {
 		sctx->b.flags |= SI_CONTEXT_VGT_STREAMOUT_SYNC;
@@ -1475,25 +1450,11 @@ void si_trace_emit(struct si_context *sctx)
 
 	radeon_emit(cs, PKT3(PKT3_WRITE_DATA, 3, 0));
 	radeon_emit(cs, S_370_DST_SEL(V_370_MEMORY_SYNC) |
 		    S_370_WR_CONFIRM(1) |
 		    S_370_ENGINE_SEL(V_370_ME));
 	radeon_emit(cs, sctx->trace_buf->gpu_address);
 	radeon_emit(cs, sctx->trace_buf->gpu_address >> 32);
 	radeon_emit(cs, sctx->trace_id);
 	radeon_emit(cs, PKT3(PKT3_NOP, 0, 0));
 	radeon_emit(cs, AC_ENCODE_TRACE_POINT(sctx->trace_id));
-
-	if (sctx->ce_ib) {
-		struct radeon_winsys_cs *ce = sctx->ce_ib;
-
-		radeon_emit(ce, PKT3(PKT3_WRITE_DATA, 3, 0));
-		radeon_emit(ce, S_370_DST_SEL(V_370_MEM_ASYNC) |
-			    S_370_WR_CONFIRM(1) |
-			    S_370_ENGINE_SEL(V_370_CE));
-		radeon_emit(ce, sctx->trace_buf->gpu_address + 4);
-		radeon_emit(ce, (sctx->trace_buf->gpu_address + 4) >> 32);
-		radeon_emit(ce, sctx->trace_id);
-		radeon_emit(ce, PKT3(PKT3_NOP, 0, 0));
-		radeon_emit(ce, AC_ENCODE_TRACE_POINT(sctx->trace_id));
-	}
 }
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
index d266253..9cadfc4 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.c
@@ -559,26 +559,20 @@ static bool amdgpu_ib_new_buffer(struct amdgpu_winsys *ws, struct amdgpu_ib *ib)
     * INDIRECT_BUFFER packet.
     */
    if (amdgpu_cs_has_chaining(amdgpu_cs_from_ib(ib)))
       buffer_size = 4 *util_next_power_of_two(ib->max_ib_size);
    else
       buffer_size = 4 *util_next_power_of_two(4 * ib->max_ib_size);
 
    buffer_size = MIN2(buffer_size, 4 * 512 * 1024);
 
    switch (ib->ib_type) {
-   case IB_CONST_PREAMBLE:
-      buffer_size = MAX2(buffer_size, 4 * 1024);
-      break;
-   case IB_CONST:
-      buffer_size = MAX2(buffer_size, 16 * 1024 * 4);
-      break;
    case IB_MAIN:
       buffer_size = MAX2(buffer_size, 8 * 1024 * 4);
       break;
    default:
       unreachable("unhandled IB type");
    }
 
    pb = ws->base.buffer_create(&ws->base, buffer_size,
                                ws->info.gart_page_size,
                                RADEON_DOMAIN_GTT, 0);
@@ -602,53 +596,38 @@ static bool amdgpu_ib_new_buffer(struct amdgpu_winsys *ws, struct amdgpu_ib *ib)
 
 static unsigned amdgpu_ib_max_submit_dwords(enum ib_type ib_type)
 {
    switch (ib_type) {
    case IB_MAIN:
       /* Smaller submits means the GPU gets busy sooner and there is less
        * waiting for buffers and fences. Proof:
        *   http://www.phoronix.com/scan.php?page=article&item=mesa-111-si&num=1
        */
       return 20 * 1024;
-   case IB_CONST_PREAMBLE:
-   case IB_CONST:
-      /* There isn't really any reason to limit CE IB size beyond the natural
-       * limit implied by the main IB, except perhaps GTT size. Just return
-       * an extremely large value that we never get anywhere close to.
-       */
-      return 16 * 1024 * 1024;
    default:
       unreachable("bad ib_type");
    }
 }
 
 static bool amdgpu_get_new_ib(struct radeon_winsys *ws, struct amdgpu_cs *cs,
                               enum ib_type ib_type)
 {
    struct amdgpu_winsys *aws = (struct amdgpu_winsys*)ws;
    /* Small IBs are better than big IBs, because the GPU goes idle quicker
     * and there is less waiting for buffers and fences. Proof:
     *   http://www.phoronix.com/scan.php?page=article&item=mesa-111-si&num=1
     */
    struct amdgpu_ib *ib = NULL;
    struct amdgpu_cs_ib_info *info = &cs->csc->ib[ib_type];
    unsigned ib_size = 0;
 
    switch (ib_type) {
-   case IB_CONST_PREAMBLE:
-      ib = &cs->const_preamble_ib;
-      ib_size = 256 * 4;
-      break;
-   case IB_CONST:
-      ib = &cs->const_ib;
-      ib_size = 8 * 1024 * 4;
-      break;
    case IB_MAIN:
       ib = &cs->main;
       ib_size = 4 * 1024 * 4;
       break;
    default:
       unreachable("unhandled IB type");
    }
 
    if (!amdgpu_cs_has_chaining(cs)) {
       ib_size = MAX2(ib_size,
@@ -721,24 +700,20 @@ static bool amdgpu_init_cs_context(struct amdgpu_cs_context *cs,
       cs->request.ip_type = AMDGPU_HW_IP_GFX;
       break;
    }
 
    memset(cs->buffer_indices_hashlist, -1, sizeof(cs->buffer_indices_hashlist));
    cs->last_added_bo = NULL;
 
    cs->request.number_of_ibs = 1;
    cs->request.ibs = &cs->ib[IB_MAIN];
 
-   cs->ib[IB_CONST].flags = AMDGPU_IB_FLAG_CE;
-   cs->ib[IB_CONST_PREAMBLE].flags = AMDGPU_IB_FLAG_CE |
-                                     AMDGPU_IB_FLAG_PREAMBLE;
-
    return true;
 }
 
 static void amdgpu_cs_context_cleanup(struct amdgpu_cs_context *cs)
 {
    unsigned i;
 
    for (i = 0; i < cs->num_real_buffers; i++) {
       p_atomic_dec(&cs->real_buffers[i].bo->num_cs_references);
       amdgpu_winsys_bo_reference(&cs->real_buffers[i].bo, NULL);
@@ -792,22 +767,20 @@ amdgpu_cs_create(struct radeon_winsys_ctx *rwctx,
    }
 
    util_queue_fence_init(&cs->flush_completed);
 
    cs->ctx = ctx;
    cs->flush_cs = flush;
    cs->flush_data = flush_ctx;
    cs->ring_type = ring_type;
 
    cs->main.ib_type = IB_MAIN;
-   cs->const_ib.ib_type = IB_CONST;
-   cs->const_preamble_ib.ib_type = IB_CONST_PREAMBLE;
 
    if (!amdgpu_init_cs_context(&cs->csc1, ring_type)) {
       FREE(cs);
       return NULL;
    }
 
    if (!amdgpu_init_cs_context(&cs->csc2, ring_type)) {
       amdgpu_destroy_cs_context(&cs->csc1);
       FREE(cs);
       return NULL;
@@ -821,66 +794,20 @@ amdgpu_cs_create(struct radeon_winsys_ctx *rwctx,
       amdgpu_destroy_cs_context(&cs->csc2);
       amdgpu_destroy_cs_context(&cs->csc1);
       FREE(cs);
       return NULL;
    }
 
    p_atomic_inc(&ctx->ws->num_cs);
    return &cs->main.base;
 }
 
-static struct radeon_winsys_cs *
-amdgpu_cs_add_const_ib(struct radeon_winsys_cs *rcs)
-{
-   struct amdgpu_cs *cs = (struct amdgpu_cs*)rcs;
-   struct amdgpu_winsys *ws = cs->ctx->ws;
-
-   /* only one const IB can be added */
-   if (cs->ring_type != RING_GFX || cs->const_ib.ib_mapped)
-      return NULL;
-
-   if (!amdgpu_get_new_ib(&ws->base, cs, IB_CONST))
-      return NULL;
-
-   cs->csc->request.number_of_ibs = 2;
-   cs->csc->request.ibs = &cs->csc->ib[IB_CONST];
-
-   cs->cst->request.number_of_ibs = 2;
-   cs->cst->request.ibs = &cs->cst->ib[IB_CONST];
-
-   return &cs->const_ib.base;
-}
-
-static struct radeon_winsys_cs *
-amdgpu_cs_add_const_preamble_ib(struct radeon_winsys_cs *rcs)
-{
-   struct amdgpu_cs *cs = (struct amdgpu_cs*)rcs;
-   struct amdgpu_winsys *ws = cs->ctx->ws;
-
-   /* only one const preamble IB can be added and only when the const IB has
-    * also been mapped */
-   if (cs->ring_type != RING_GFX || !cs->const_ib.ib_mapped ||
-       cs->const_preamble_ib.ib_mapped)
-      return NULL;
-
-   if (!amdgpu_get_new_ib(&ws->base, cs, IB_CONST_PREAMBLE))
-      return NULL;
-
-   cs->csc->request.number_of_ibs = 3;
-   cs->csc->request.ibs = &cs->csc->ib[IB_CONST_PREAMBLE];
-
-   cs->cst->request.number_of_ibs = 3;
-   cs->cst->request.ibs = &cs->cst->ib[IB_CONST_PREAMBLE];
-
-   return &cs->const_preamble_ib.base;
-}
-
 static bool amdgpu_cs_validate(struct radeon_winsys_cs *rcs)
 {
    return true;
 }
 
 static bool amdgpu_cs_check_space(struct radeon_winsys_cs *rcs, unsigned dw)
 {
    struct amdgpu_ib *ib = amdgpu_ib(rcs);
    struct amdgpu_cs *cs = amdgpu_cs_from_ib(ib);
    unsigned requested_size = rcs->prev_dw + rcs->current.cdw + dw;
@@ -1316,29 +1243,20 @@ static int amdgpu_cs_flush(struct radeon_winsys_cs *rcs,
       break;
    case RING_GFX:
       /* pad GFX ring to 8 DWs to meet CP fetch alignment requirements */
       if (ws->info.gfx_ib_pad_with_type2) {
          while (rcs->current.cdw & 7)
             radeon_emit(rcs, 0x80000000); /* type2 nop packet */
       } else {
          while (rcs->current.cdw & 7)
             radeon_emit(rcs, 0xffff1000); /* type3 nop packet */
       }
-
-      /* Also pad the const IB. */
-      if (cs->const_ib.ib_mapped)
-         while (!cs->const_ib.base.current.cdw || (cs->const_ib.base.current.cdw & 7))
-            radeon_emit(&cs->const_ib.base, 0xffff1000); /* type3 nop packet */
-
-      if (cs->const_preamble_ib.ib_mapped)
-         while (!cs->const_preamble_ib.base.current.cdw || (cs->const_preamble_ib.base.current.cdw & 7))
-            radeon_emit(&cs->const_preamble_ib.base, 0xffff1000);
       break;
    case RING_UVD:
       while (rcs->current.cdw & 15)
          radeon_emit(rcs, 0x80000000); /* type2 nop packet */
       break;
    case RING_VCN_DEC:
       while (rcs->current.cdw & 15)
          radeon_emit(rcs, 0x81ff); /* nop packet */
       break;
    default:
@@ -1351,26 +1269,20 @@ static int amdgpu_cs_flush(struct radeon_winsys_cs *rcs,
 
    /* If the CS is not empty or overflowed.... */
    if (likely(radeon_emitted(&cs->main.base, 0) &&
        cs->main.base.current.cdw <= cs->main.base.current.max_dw &&
        !debug_get_option_noop())) {
       struct amdgpu_cs_context *cur = cs->csc;
 
       /* Set IB sizes. */
       amdgpu_ib_finalize(&cs->main);
 
-      if (cs->const_ib.ib_mapped)
-         amdgpu_ib_finalize(&cs->const_ib);
-
-      if (cs->const_preamble_ib.ib_mapped)
-         amdgpu_ib_finalize(&cs->const_preamble_ib);
-
       /* Create a fence. */
       amdgpu_fence_reference(&cur->fence, NULL);
       if (cs->next_fence) {
          /* just move the reference */
          cur->fence = cs->next_fence;
          cs->next_fence = NULL;
       } else {
          cur->fence = amdgpu_fence_create(cs->ctx,
                                           cur->request.ip_type,
                                           cur->request.ip_instance,
@@ -1402,24 +1314,20 @@ static int amdgpu_cs_flush(struct radeon_winsys_cs *rcs,
 
       if (!(flags & RADEON_FLUSH_ASYNC)) {
          amdgpu_cs_sync_flush(rcs);
          error_code = cur->error_code;
       }
    } else {
       amdgpu_cs_context_cleanup(cs->csc);
    }
 
    amdgpu_get_new_ib(&ws->base, cs, IB_MAIN);
-   if (cs->const_ib.ib_mapped)
-      amdgpu_get_new_ib(&ws->base, cs, IB_CONST);
-   if (cs->const_preamble_ib.ib_mapped)
-      amdgpu_get_new_ib(&ws->base, cs, IB_CONST_PREAMBLE);
 
    cs->main.base.used_gart = 0;
    cs->main.base.used_vram = 0;
 
    if (cs->ring_type == RING_GFX)
       ws->num_gfx_IBs++;
    else if (cs->ring_type == RING_DMA)
       ws->num_sdma_IBs++;
 
    return error_code;
@@ -1427,24 +1335,20 @@ static int amdgpu_cs_flush(struct radeon_winsys_cs *rcs,
 
 static void amdgpu_cs_destroy(struct radeon_winsys_cs *rcs)
 {
    struct amdgpu_cs *cs = amdgpu_cs(rcs);
 
    amdgpu_cs_sync_flush(rcs);
    util_queue_fence_destroy(&cs->flush_completed);
    p_atomic_dec(&cs->ctx->ws->num_cs);
    pb_reference(&cs->main.big_ib_buffer, NULL);
    FREE(cs->main.base.prev);
-   pb_reference(&cs->const_ib.big_ib_buffer, NULL);
-   FREE(cs->const_ib.base.prev);
-   pb_reference(&cs->const_preamble_ib.big_ib_buffer, NULL);
-   FREE(cs->const_preamble_ib.base.prev);
    amdgpu_destroy_cs_context(&cs->csc1);
    amdgpu_destroy_cs_context(&cs->csc2);
    amdgpu_fence_reference(&cs->next_fence, NULL);
    FREE(cs);
 }
 
 static bool amdgpu_bo_is_referenced(struct radeon_winsys_cs *rcs,
                                     struct pb_buffer *_buf,
                                     enum radeon_bo_usage usage)
 {
@@ -1453,22 +1357,20 @@ static bool amdgpu_bo_is_referenced(struct radeon_winsys_cs *rcs,
 
    return amdgpu_bo_is_referenced_by_cs_with_usage(cs, bo, usage);
 }
 
 void amdgpu_cs_init_functions(struct amdgpu_winsys *ws)
 {
    ws->base.ctx_create = amdgpu_ctx_create;
    ws->base.ctx_destroy = amdgpu_ctx_destroy;
    ws->base.ctx_query_reset_status = amdgpu_ctx_query_reset_status;
    ws->base.cs_create = amdgpu_cs_create;
-   ws->base.cs_add_const_ib = amdgpu_cs_add_const_ib;
-   ws->base.cs_add_const_preamble_ib = amdgpu_cs_add_const_preamble_ib;
    ws->base.cs_destroy = amdgpu_cs_destroy;
    ws->base.cs_add_buffer = amdgpu_cs_add_buffer;
    ws->base.cs_validate = amdgpu_cs_validate;
    ws->base.cs_check_space = amdgpu_cs_check_space;
    ws->base.cs_get_buffer_list = amdgpu_cs_get_buffer_list;
    ws->base.cs_flush = amdgpu_cs_flush;
    ws->base.cs_get_next_fence = amdgpu_cs_get_next_fence;
    ws->base.cs_is_buffer_referenced = amdgpu_bo_is_referenced;
    ws->base.cs_sync_flush = amdgpu_cs_sync_flush;
    ws->base.fence_wait = amdgpu_fence_wait_rel_timeout;
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h
index d83c1e0..8f5c336 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_cs.h
@@ -52,24 +52,22 @@ struct amdgpu_cs_buffer {
          uint64_t priority_usage;
       } real;
       struct {
          uint32_t real_idx; /* index of underlying real BO */
       } slab;
    } u;
    enum radeon_bo_usage usage;
 };
 
 enum ib_type {
-   IB_CONST_PREAMBLE = 0,
-   IB_CONST = 1, /* the const IB must be first */
-   IB_MAIN = 2,
-   IB_NUM
+   IB_MAIN,
+   IB_NUM,
 };
 
 struct amdgpu_ib {
    struct radeon_winsys_cs base;
 
    /* A buffer out of which new IBs are allocated. */
    struct pb_buffer        *big_ib_buffer;
    uint8_t                 *ib_mapped;
    unsigned                used_ib_space;
    unsigned                max_ib_size;
@@ -110,22 +108,20 @@ struct amdgpu_cs_context {
    unsigned                    max_fence_dependencies;
 
    struct pipe_fence_handle    *fence;
 
    /* the error returned from cs_flush for non-async submissions */
    int                         error_code;
 };
 
 struct amdgpu_cs {
    struct amdgpu_ib main; /* must be first because this is inherited */
-   struct amdgpu_ib const_ib; /* optional constant engine IB */
-   struct amdgpu_ib const_preamble_ib;
    struct amdgpu_ctx *ctx;
    enum ring_type ring_type;
 
    /* We flip between these two CS. While one is being consumed
     * by the kernel in another thread, the other one is being filled
     * by the pipe driver. */
    struct amdgpu_cs_context csc1;
    struct amdgpu_cs_context csc2;
    /* The currently-used CS. */
    struct amdgpu_cs_context *csc;
@@ -192,24 +188,20 @@ amdgpu_cs(struct radeon_winsys_cs *base)
 
 #define get_container(member_ptr, container_type, container_member) \
    (container_type *)((char *)(member_ptr) - offsetof(container_type, container_member))
 
 static inline struct amdgpu_cs *
 amdgpu_cs_from_ib(struct amdgpu_ib *ib)
 {
    switch (ib->ib_type) {
    case IB_MAIN:
       return get_container(ib, struct amdgpu_cs, main);
-   case IB_CONST:
-      return get_container(ib, struct amdgpu_cs, const_ib);
-   case IB_CONST_PREAMBLE:
-      return get_container(ib, struct amdgpu_cs, const_preamble_ib);
    default:
       unreachable("bad ib_type");
    }
 }
 
 static inline bool
 amdgpu_bo_is_referenced_by_cs(struct amdgpu_cs *cs,
                               struct amdgpu_winsys_bo *bo)
 {
    int num_refs = bo->num_cs_references;
-- 
2.7.4



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