iris: initial query code

3 files changed, 344 insertions, 11 deletions

diff --git a/src/gallium/drivers/iris/iris_defines.h b/src/gallium/drivers/iris/iris_defines.h
new file mode 100644
index 00000000000..a006e7a9ae1
--- /dev/null
+++ b/src/gallium/drivers/iris/iris_defines.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright © 2018 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef IRIS_DEFINES_H
+#define IRIS_DEFINES_H
+
+/**
+ * @file iris_defines.h
+ *
+ * Random hardware #defines that we're not using GENXML for.
+ */
+
+#define MI_PREDICATE                         (0xC << 23)
+# define MI_PREDICATE_LOADOP_KEEP            (0 << 6)
+# define MI_PREDICATE_LOADOP_LOAD            (2 << 6)
+# define MI_PREDICATE_LOADOP_LOADINV         (3 << 6)
+# define MI_PREDICATE_COMBINEOP_SET          (0 << 3)
+# define MI_PREDICATE_COMBINEOP_AND          (1 << 3)
+# define MI_PREDICATE_COMBINEOP_OR           (2 << 3)
+# define MI_PREDICATE_COMBINEOP_XOR          (3 << 3)
+# define MI_PREDICATE_COMPAREOP_TRUE         (0 << 0)
+# define MI_PREDICATE_COMPAREOP_FALSE        (1 << 0)
+# define MI_PREDICATE_COMPAREOP_SRCS_EQUAL   (2 << 0)
+# define MI_PREDICATE_COMPAREOP_DELTAS_EQUAL (3 << 0)
+
+/* Predicate registers */
+#define MI_PREDICATE_SRC0                    0x2400
+#define MI_PREDICATE_SRC1                    0x2408
+#define MI_PREDICATE_DATA                    0x2410
+#define MI_PREDICATE_RESULT                  0x2418
+#define MI_PREDICATE_RESULT_1                0x241C
+#define MI_PREDICATE_RESULT_2                0x2214
+
+/* The number of bits in our TIMESTAMP queries. */
+#define TIMESTAMP_BITS 36
+
+#endif
diff --git a/src/gallium/drivers/iris/iris_query.c b/src/gallium/drivers/iris/iris_query.c
index 4f2f35d9377..a8bab7d3e35 100644
--- a/src/gallium/drivers/iris/iris_query.c
+++ b/src/gallium/drivers/iris/iris_query.c
@@ -33,46 +33,242 @@
 #include "pipe/p_context.h"
 #include "pipe/p_screen.h"
 #include "util/u_inlines.h"
-#include "util/u_format.h"
-#include "util/u_upload_mgr.h"
-#include "util/ralloc.h"
 #include "iris_context.h"
+#include "iris_defines.h"
 #include "iris_resource.h"
 #include "iris_screen.h"
-#include "intel/compiler/brw_compiler.h"
+
+#define CS_GPR(n) (0x2600 + (n) * 8)
+
+#define MI_MATH (0x1a << 23)
+
+#define MI_ALU_LOAD      0x080
+#define MI_ALU_LOADINV   0x480
+#define MI_ALU_LOAD0     0x081
+#define MI_ALU_LOAD1     0x481
+#define MI_ALU_ADD       0x100
+#define MI_ALU_SUB       0x101
+#define MI_ALU_AND       0x102
+#define MI_ALU_OR        0x103
+#define MI_ALU_XOR       0x104
+#define MI_ALU_STORE     0x180
+#define MI_ALU_STOREINV  0x580
+
+#define MI_ALU_R0        0x00
+#define MI_ALU_R1        0x01
+#define MI_ALU_R2        0x02
+#define MI_ALU_R3        0x03
+#define MI_ALU_R4        0x04
+#define MI_ALU_SRCA      0x20
+#define MI_ALU_SRCB      0x21
+#define MI_ALU_ACCU      0x31
+#define MI_ALU_ZF        0x32
+#define MI_ALU_CF        0x33
+
+#define MI_ALU0(op)       ((MI_ALU_##op << 20))
+#define MI_ALU1(op, x)    ((MI_ALU_##op << 20) | (MI_ALU_##x << 10)
+#define MI_ALU2(op, x, y) \
+   ((MI_ALU_##op << 20) | (MI_ALU_##x << 10) | (MI_ALU_##y))
 
 struct iris_query {
    enum pipe_query_type type;
+
+   bool ready;
+
+   uint64_t result;
+
+   struct iris_bo *bo;
+   struct iris_query_snapshots *map;
+};
+
+struct iris_query_snapshots {
+   uint64_t start;
+   uint64_t end;
+   uint64_t snapshots_landed;
 };
 
+/**
+ * Is this type of query written by PIPE_CONTROL?
+ */
+static bool
+iris_is_query_pipelined(struct iris_query *q)
+{
+   switch (q->type) {
+   case PIPE_QUERY_OCCLUSION_COUNTER:
+   case PIPE_QUERY_OCCLUSION_PREDICATE:
+   case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
+   case PIPE_QUERY_TIMESTAMP:
+   case PIPE_QUERY_TIMESTAMP_DISJOINT:
+   case PIPE_QUERY_TIME_ELAPSED:
+      return true;
+
+   default:
+      return false;
+   }
+}
+
+static void
+write_availability(struct iris_context *ice,
+                   struct iris_query *q,
+                   bool available)
+{
+   struct iris_batch *batch = &ice->render_batch;
+   unsigned flags = PIPE_CONTROL_WRITE_IMMEDIATE;
+   unsigned offset = offsetof(struct iris_query_snapshots, snapshots_landed);
+
+   if (!iris_is_query_pipelined(q)) {
+      ice->vtbl.store_data_imm64(batch, q->bo, offset, available);
+   } else {
+      if (available) {
+         /* Order available *after* the query results. */
+         flags |= PIPE_CONTROL_FLUSH_ENABLE;
+      } else {
+         /* Make it unavailable *before* any pipelined reads. */
+         flags |= PIPE_CONTROL_CS_STALL;
+      }
+      iris_emit_pipe_control_write(batch, flags, q->bo, offset, available);
+   }
+}
+
+/**
+ * Write PS_DEPTH_COUNT to q->(dest) via a PIPE_CONTROL.
+ */
+static void
+iris_pipelined_write(struct iris_batch *batch,
+                     struct iris_query *q,
+                     enum pipe_control_flags flags,
+                     unsigned offset)
+{
+   const struct gen_device_info *devinfo = &batch->screen->devinfo;
+   const unsigned optional_cs_stall =
+      devinfo->gen == 9 && devinfo->gt == 4 ?  PIPE_CONTROL_CS_STALL : 0;
+
+   iris_emit_pipe_control_write(batch, flags | optional_cs_stall,
+                                q->bo, offset, 0ull);
+}
+
+static void
+write_value(struct iris_context *ice, struct iris_query *q, unsigned offset)
+{
+   iris_use_pinned_bo(&ice->render_batch, q->bo, true);
+
+   switch (q->type) {
+   case PIPE_QUERY_OCCLUSION_COUNTER:
+   case PIPE_QUERY_OCCLUSION_PREDICATE:
+   case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
+      iris_pipelined_write(&ice->render_batch, q,
+                           PIPE_CONTROL_WRITE_DEPTH_COUNT |
+                           PIPE_CONTROL_DEPTH_STALL,
+                           offset);
+   case PIPE_QUERY_TIME_ELAPSED:
+      iris_pipelined_write(&ice->render_batch, q,
+                           PIPE_CONTROL_WRITE_TIMESTAMP,
+                           offset);
+      break;
+   default:
+      assert(false);
+   }
+}
+
+static void
+calculate_result_on_cpu(struct iris_query *q)
+{
+   switch (q->type) {
+   case PIPE_QUERY_OCCLUSION_PREDICATE:
+   case PIPE_QUERY_OCCLUSION_PREDICATE_CONSERVATIVE:
+      q->result = q->map->end != q->map->start;
+      break;
+   case PIPE_QUERY_OCCLUSION_COUNTER:
+   case PIPE_QUERY_TIME_ELAPSED:
+   case PIPE_QUERY_PRIMITIVES_GENERATED:
+   case PIPE_QUERY_PRIMITIVES_EMITTED:
+   default:
+      q->result = q->map->end - q->map->start;
+      break;
+   }
+
+   q->ready = true;
+}
+
+/**
+ * Calculate the result and store it to CS_GPR0.
+ */
+static void
+calculate_result_on_gpu(struct iris_context *ice, struct iris_query *q)
+{
+   struct iris_batch *batch = &ice->render_batch;
+
+   ice->vtbl.load_register_mem64(batch, CS_GPR(1), q->bo,
+                                 offsetof(struct iris_query_snapshots, start));
+   ice->vtbl.load_register_mem64(batch, CS_GPR(2), q->bo,
+                                 offsetof(struct iris_query_snapshots, end));
+
+   static const uint32_t math[] = {
+      MI_MATH | (5 - 2),
+      MI_ALU2(LOAD, SRCA, R2),
+      MI_ALU2(LOAD, SRCB, R1),
+      MI_ALU0(SUB),
+      MI_ALU2(STORE, R0, ACCU),
+   };
+   iris_batch_emit(batch, math, sizeof(math));
+}
+
 static struct pipe_query *
 iris_create_query(struct pipe_context *ctx,
                   unsigned query_type,
                   unsigned index)
 {
-   struct iris_query *query = calloc(1, sizeof(struct iris_query));
+   struct iris_query *q = calloc(1, sizeof(struct iris_query));
 
-   query->type = query_type;
+   q->type = query_type;
 
-   return (struct pipe_query *) query;
+   return (struct pipe_query *) q;
 }
 
 static void
 iris_destroy_query(struct pipe_context *ctx, struct pipe_query *p_query)
 {
    struct iris_query *query = (void *) p_query;
+   iris_bo_unreference(query->bo);
    free(query);
 }
 
+
 static boolean
 iris_begin_query(struct pipe_context *ctx, struct pipe_query *query)
 {
+   struct iris_screen *screen = (void *) ctx->screen;
+   struct iris_context *ice = (void *) ctx;
+   struct iris_query *q = (void *) query;
+
+   iris_bo_unreference(q->bo);
+   q->bo = iris_bo_alloc(screen->bufmgr, "query object", 4096,
+                         IRIS_MEMZONE_OTHER);
+   if (!q->bo)
+      return false;
+
+   q->map = iris_bo_map(&ice->dbg, q->bo, MAP_READ | MAP_ASYNC);
+   if (!q->map)
+      return false;
+
+   q->result = 0ull;
+   q->ready = false;
+
+   write_availability(ice, q, false);
+   write_value(ice, q, offsetof(struct iris_query_snapshots, start));
+
    return true;
 }
 
 static bool
 iris_end_query(struct pipe_context *ctx, struct pipe_query *query)
 {
+   struct iris_context *ice = (void *) ctx;
+   struct iris_query *q = (void *) query;
+
+   write_value(ice, q, offsetof(struct iris_query_snapshots, end));
+   write_availability(ice, q, true);
+
    return true;
 }
 
@@ -80,17 +276,96 @@ static boolean
 iris_get_query_result(struct pipe_context *ctx,
                       struct pipe_query *query,
                       boolean wait,
-                      union pipe_query_result *vresult)
+                      union pipe_query_result *result)
 {
-   uint64_t *result = (uint64_t*)vresult;
+   struct iris_context *ice = (void *) ctx;
+   struct iris_query *q = (void *) query;
+
+   if (!q->ready) {
+      if (iris_batch_references(&ice->render_batch, q->bo))
+         iris_batch_flush(&ice->render_batch);
+
+      if (!q->map->snapshots_landed) {
+         if (wait)
+            iris_bo_wait_rendering(q->bo);
+         else
+            return false;
+      }
+
+      assert(q->map->snapshots_landed);
+      calculate_result_on_cpu(q);
+   }
+
+   assert(q->ready);
+   result->u64 = q->result;
+
+   return true;
+}
+
+static void
+iris_get_query_result_resource(struct pipe_context *ctx,
+                               struct pipe_query *query,
+                               boolean wait,
+                               enum pipe_query_value_type result_type,
+                               int index,
+                               struct pipe_resource *p_res,
+                               unsigned offset)
+{
+   struct iris_context *ice = (void *) ctx;
+   struct iris_query *q = (void *) query;
+   struct iris_batch *batch = &ice->render_batch;
+
+   if (!q->ready && q->map->snapshots_landed) {
+      /* The final snapshots happen to have landed, so let's just compute
+       * the result on the CPU now...
+       */
+      calculate_result_on_cpu(q);
+   }
+
+   if (q->ready) {
+      /* We happen to have the result on the CPU, so just copy it. */
+      if (result_type <= PIPE_QUERY_TYPE_U32) {
+         ice->vtbl.store_data_imm32(batch, iris_resource_bo(p_res), offset,
+                                    q->result);
+      } else {
+         ice->vtbl.store_data_imm64(batch, iris_resource_bo(p_res), offset,
+                                    q->result);
+      }
+      return;
+   }
+
+   /* Calculate the result to CS_GPR0 */
+   calculate_result_on_gpu(ice, q);
+
+   bool predicated = !wait && iris_is_query_pipelined(q);
+
+   if (predicated) {
+      ice->vtbl.load_register_imm64(batch, MI_PREDICATE_SRC1, 0ull);
+      ice->vtbl.load_register_mem64(batch, MI_PREDICATE_SRC0, q->bo,
+                                    offsetof(struct iris_query_snapshots,
+                                             snapshots_landed));
+      uint32_t predicate = MI_PREDICATE |
+                           MI_PREDICATE_LOADOP_LOADINV |
+                           MI_PREDICATE_COMBINEOP_SET |
+                           MI_PREDICATE_COMPAREOP_SRCS_EQUAL;
+      iris_batch_emit(batch, &predicate, sizeof(uint32_t));
+   }
 
-   *result = 0;
-   return TRUE;
+   if (result_type <= PIPE_QUERY_TYPE_U32) {
+      ice->vtbl.store_register_mem32(batch, CS_GPR(0),
+                                     iris_resource_bo(p_res),
+                                     offset, predicated);
+   } else {
+      ice->vtbl.store_register_mem64(batch, CS_GPR(0),
+                                     iris_resource_bo(p_res),
+                                     offset, predicated);
+   }
 }
 
 static void
 iris_set_active_query_state(struct pipe_context *pipe, boolean enable)
 {
+   /* Do nothing, intentionally - only u_blitter uses this. */
 }
 
 void
@@ -101,5 +376,6 @@ iris_init_query_functions(struct pipe_context *ctx)
    ctx->begin_query = iris_begin_query;
    ctx->end_query = iris_end_query;
    ctx->get_query_result = iris_get_query_result;
+   ctx->get_query_result_resource = iris_get_query_result_resource;
    ctx->set_active_query_state = iris_set_active_query_state;
 }
diff --git a/src/gallium/drivers/iris/iris_screen.c b/src/gallium/drivers/iris/iris_screen.c
index 29a31c91410..efc6a7045da 100644
--- a/src/gallium/drivers/iris/iris_screen.c
+++ b/src/gallium/drivers/iris/iris_screen.c
@@ -155,6 +155,7 @@ iris_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
    case PIPE_CAP_POST_DEPTH_COVERAGE:
    case PIPE_CAP_QUERY_SO_OVERFLOW:
+   case PIPE_CAP_QUERY_BUFFER_OBJECT:
    case PIPE_CAP_TGSI_TEX_TXF_LZ:
    case PIPE_CAP_TGSI_CLOCK:
    case PIPE_CAP_TGSI_BALLOT: