intel: Pull the guts of gen7_l3_state.c into a shared helper

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

5 files changed, 436 insertions, 334 deletions

diff --git a/src/intel/Makefile.sources b/src/intel/Makefile.sources
index af4174f..94073d2 100644
--- a/src/intel/Makefile.sources
+++ b/src/intel/Makefile.sources
@@ -8,7 +8,9 @@ BLORP_FILES = \
 
 COMMON_FILES = \
 	common/gen_device_info.c \
-	common/gen_device_info.h
+	common/gen_device_info.h \
+	common/gen_l3_config.c \
+	common/gen_l3_config.h
 
 GENXML_GENERATED_FILES = \
 	genxml/gen4_pack.h \
diff --git a/src/intel/common/gen_l3_config.c b/src/intel/common/gen_l3_config.c
new file mode 100644
index 0000000..0d99f12
--- /dev/null
+++ b/src/intel/common/gen_l3_config.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 2015 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#include <stdlib.h>
+#include <math.h>
+
+#include "util/macros.h"
+#include "main/macros.h"
+
+#include "gen_l3_config.h"
+
+/**
+ * IVB/HSW validated L3 configurations.  The first entry will be used as
+ * default by gen7_restore_default_l3_config(), otherwise the ordering is
+ * unimportant.
+ */
+static const struct gen_l3_config ivb_l3_configs[] = {
+   /* SLM URB ALL DC  RO  IS   C   T */
+   {{  0, 32,  0,  0, 32,  0,  0,  0 }},
+   {{  0, 32,  0, 16, 16,  0,  0,  0 }},
+   {{  0, 32,  0,  4,  0,  8,  4, 16 }},
+   {{  0, 28,  0,  8,  0,  8,  4, 16 }},
+   {{  0, 28,  0, 16,  0,  8,  4,  8 }},
+   {{  0, 28,  0,  8,  0, 16,  4,  8 }},
+   {{  0, 28,  0,  0,  0, 16,  4, 16 }},
+   {{  0, 32,  0,  0,  0, 16,  0, 16 }},
+   {{  0, 28,  0,  4, 32,  0,  0,  0 }},
+   {{ 16, 16,  0, 16, 16,  0,  0,  0 }},
+   {{ 16, 16,  0,  8,  0,  8,  8,  8 }},
+   {{ 16, 16,  0,  4,  0,  8,  4, 16 }},
+   {{ 16, 16,  0,  4,  0, 16,  4,  8 }},
+   {{ 16, 16,  0,  0, 32,  0,  0,  0 }},
+   {{ 0 }}
+};
+
+/**
+ * VLV validated L3 configurations.  \sa ivb_l3_configs.
+ */
+static const struct gen_l3_config vlv_l3_configs[] = {
+   /* SLM URB ALL DC  RO  IS   C   T */
+   {{  0, 64,  0,  0, 32,  0,  0,  0 }},
+   {{  0, 80,  0,  0, 16,  0,  0,  0 }},
+   {{  0, 80,  0,  8,  8,  0,  0,  0 }},
+   {{  0, 64,  0, 16, 16,  0,  0,  0 }},
+   {{  0, 60,  0,  4, 32,  0,  0,  0 }},
+   {{ 32, 32,  0, 16, 16,  0,  0,  0 }},
+   {{ 32, 40,  0,  8, 16,  0,  0,  0 }},
+   {{ 32, 40,  0, 16,  8,  0,  0,  0 }},
+   {{ 0 }}
+};
+
+/**
+ * BDW validated L3 configurations.  \sa ivb_l3_configs.
+ */
+static const struct gen_l3_config bdw_l3_configs[] = {
+   /* SLM URB ALL DC  RO  IS   C   T */
+   {{  0, 48, 48,  0,  0,  0,  0,  0 }},
+   {{  0, 48,  0, 16, 32,  0,  0,  0 }},
+   {{  0, 32,  0, 16, 48,  0,  0,  0 }},
+   {{  0, 32,  0,  0, 64,  0,  0,  0 }},
+   {{  0, 32, 64,  0,  0,  0,  0,  0 }},
+   {{ 24, 16, 48,  0,  0,  0,  0,  0 }},
+   {{ 24, 16,  0, 16, 32,  0,  0,  0 }},
+   {{ 24, 16,  0, 32, 16,  0,  0,  0 }},
+   {{ 0 }}
+};
+
+/**
+ * CHV/SKL validated L3 configurations.  \sa ivb_l3_configs.
+ */
+static const struct gen_l3_config chv_l3_configs[] = {
+   /* SLM URB ALL DC  RO  IS   C   T */
+   {{  0, 48, 48,  0,  0,  0,  0,  0 }},
+   {{  0, 48,  0, 16, 32,  0,  0,  0 }},
+   {{  0, 32,  0, 16, 48,  0,  0,  0 }},
+   {{  0, 32,  0,  0, 64,  0,  0,  0 }},
+   {{  0, 32, 64,  0,  0,  0,  0,  0 }},
+   {{ 32, 16, 48,  0,  0,  0,  0,  0 }},
+   {{ 32, 16,  0, 16, 32,  0,  0,  0 }},
+   {{ 32, 16,  0, 32, 16,  0,  0,  0 }},
+   {{ 0 }}
+};
+
+/**
+ * Return a zero-terminated array of validated L3 configurations for the
+ * specified device.
+ */
+static const struct gen_l3_config *
+get_l3_configs(const struct gen_device_info *devinfo)
+{
+   switch (devinfo->gen) {
+   case 7:
+      return (devinfo->is_baytrail ? vlv_l3_configs : ivb_l3_configs);
+
+   case 8:
+      return (devinfo->is_cherryview ? chv_l3_configs : bdw_l3_configs);
+
+   case 9:
+      return chv_l3_configs;
+
+   default:
+      unreachable("Not implemented");
+   }
+}
+
+/**
+ * L1-normalize a vector of L3 partition weights.
+ */
+static struct gen_l3_weights
+norm_l3_weights(struct gen_l3_weights w)
+{
+   float sz = 0;
+
+   for (unsigned i = 0; i < GEN_NUM_L3P; i++)
+      sz += w.w[i];
+
+   for (unsigned i = 0; i < GEN_NUM_L3P; i++)
+      w.w[i] /= sz;
+
+   return w;
+}
+
+/**
+ * Get the relative partition weights of the specified L3 configuration.
+ */
+struct gen_l3_weights
+gen_get_l3_config_weights(const struct gen_l3_config *cfg)
+{
+   if (cfg) {
+      struct gen_l3_weights w;
+
+      for (unsigned i = 0; i < GEN_NUM_L3P; i++)
+         w.w[i] = cfg->n[i];
+
+      return norm_l3_weights(w);
+   } else {
+      const struct gen_l3_weights w = { { 0 } };
+      return w;
+   }
+}
+
+/**
+ * Distance between two L3 configurations represented as vectors of weights.
+ * Usually just the L1 metric except when the two configurations are
+ * considered incompatible in which case the distance will be infinite.  Note
+ * that the compatibility condition is asymmetric -- They will be considered
+ * incompatible whenever the reference configuration \p w0 requires SLM, DC,
+ * or URB but \p w1 doesn't provide it.
+ */
+float
+gen_diff_l3_weights(struct gen_l3_weights w0, struct gen_l3_weights w1)
+{
+   if ((w0.w[GEN_L3P_SLM] && !w1.w[GEN_L3P_SLM]) ||
+       (w0.w[GEN_L3P_DC] && !w1.w[GEN_L3P_DC] && !w1.w[GEN_L3P_ALL]) ||
+       (w0.w[GEN_L3P_URB] && !w1.w[GEN_L3P_URB])) {
+      return HUGE_VALF;
+
+   } else {
+      float dw = 0;
+
+      for (unsigned i = 0; i < GEN_NUM_L3P; i++)
+         dw += fabs(w0.w[i] - w1.w[i]);
+
+      return dw;
+   }
+}
+
+/**
+ * Return a reasonable default L3 configuration for the specified device based
+ * on whether SLM and DC are required.  In the non-SLM non-DC case the result
+ * is intended to approximately resemble the hardware defaults.
+ */
+struct gen_l3_weights
+gen_get_default_l3_weights(const struct gen_device_info *devinfo,
+                           bool needs_dc, bool needs_slm)
+{
+   struct gen_l3_weights w = {{ 0 }};
+
+   w.w[GEN_L3P_SLM] = needs_slm;
+   w.w[GEN_L3P_URB] = 1.0;
+
+   if (devinfo->gen >= 8) {
+      w.w[GEN_L3P_ALL] = 1.0;
+   } else {
+      w.w[GEN_L3P_DC] = needs_dc ? 0.1 : 0;
+      w.w[GEN_L3P_RO] = devinfo->is_baytrail ? 0.5 : 1.0;
+   }
+
+   return norm_l3_weights(w);
+}
+
+/**
+ * Get the default L3 configuration
+ */
+const struct gen_l3_config *
+gen_get_default_l3_config(const struct gen_device_info *devinfo)
+{
+   /* For efficiency assume that the first entry of the array matches the
+    * default configuration.
+    */
+   const struct gen_l3_config *const cfg = get_l3_configs(devinfo);
+   assert(cfg == gen_get_l3_config(devinfo,
+                    gen_get_default_l3_weights(devinfo, false, false)));
+   return cfg;
+}
+
+/**
+ * Return the closest validated L3 configuration for the specified device and
+ * weight vector.
+ */
+const struct gen_l3_config *
+gen_get_l3_config(const struct gen_device_info *devinfo,
+                  struct gen_l3_weights w0)
+{
+   const struct gen_l3_config *const cfgs = get_l3_configs(devinfo);
+   const struct gen_l3_config *cfg_best = NULL;
+   float dw_best = HUGE_VALF;
+
+   for (const struct gen_l3_config *cfg = cfgs; cfg->n[GEN_L3P_URB]; cfg++) {
+      const float dw = gen_diff_l3_weights(w0, gen_get_l3_config_weights(cfg));
+
+      if (dw < dw_best) {
+         cfg_best = cfg;
+         dw_best = dw;
+      }
+   }
+
+   return cfg_best;
+}
+
+/**
+ * Return the size of an L3 way in KB.
+ */
+static unsigned
+get_l3_way_size(const struct gen_device_info *devinfo)
+{
+   if (devinfo->is_baytrail)
+      return 2;
+
+   else if (devinfo->is_cherryview || devinfo->gt == 1)
+      return 4;
+
+   else
+      return 8 * devinfo->num_slices;
+}
+
+/**
+ * Return the unit brw_context::urb::size is expressed in, in KB.  \sa
+ * gen_device_info::urb::size.
+ */
+static unsigned
+get_urb_size_scale(const struct gen_device_info *devinfo)
+{
+   return (devinfo->gen >= 8 ? devinfo->num_slices : 1);
+}
+
+unsigned
+gen_get_l3_config_urb_size(const struct gen_device_info *devinfo,
+                           const struct gen_l3_config *cfg)
+{
+   /* From the SKL "L3 Allocation and Programming" documentation:
+    *
+    * "URB is limited to 1008KB due to programming restrictions.  This is not
+    * a restriction of the L3 implementation, but of the FF and other clients.
+    * Therefore, in a GT4 implementation it is possible for the programmed
+    * allocation of the L3 data array to provide 3*384KB=1152KB for URB, but
+    * only 1008KB of this will be used."
+    */
+   const unsigned max = (devinfo->gen == 9 ? 1008 : ~0);
+   return MIN2(max, cfg->n[GEN_L3P_URB] * get_l3_way_size(devinfo)) /
+          get_urb_size_scale(devinfo);
+}
+
+/**
+ * Print out the specified L3 configuration.
+ */
+void
+gen_dump_l3_config(const struct gen_l3_config *cfg, FILE *fp)
+{
+   fprintf(stderr, "SLM=%d URB=%d ALL=%d DC=%d RO=%d IS=%d C=%d T=%d\n",
+           cfg->n[GEN_L3P_SLM], cfg->n[GEN_L3P_URB], cfg->n[GEN_L3P_ALL],
+           cfg->n[GEN_L3P_DC], cfg->n[GEN_L3P_RO],
+           cfg->n[GEN_L3P_IS], cfg->n[GEN_L3P_C], cfg->n[GEN_L3P_T]);
+}
diff --git a/src/intel/common/gen_l3_config.h b/src/intel/common/gen_l3_config.h
new file mode 100644
index 0000000..0540a7c
--- /dev/null
+++ b/src/intel/common/gen_l3_config.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2015 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#include <stdio.h>
+
+#include "gen_device_info.h"
+
+/**
+ * Chunk of L3 cache reserved for some specific purpose.
+ */
+enum gen_l3_partition {
+   /** Shared local memory. */
+   GEN_L3P_SLM = 0,
+   /** Unified return buffer. */
+   GEN_L3P_URB,
+   /** Union of DC and RO. */
+   GEN_L3P_ALL,
+   /** Data cluster RW partition. */
+   GEN_L3P_DC,
+   /** Union of IS, C and T. */
+   GEN_L3P_RO,
+   /** Instruction and state cache. */
+   GEN_L3P_IS,
+   /** Constant cache. */
+   GEN_L3P_C,
+   /** Texture cache. */
+   GEN_L3P_T,
+   /** Number of supported L3 partitions. */
+   GEN_NUM_L3P
+};
+
+/**
+ * L3 configuration represented as the number of ways allocated for each
+ * partition.  \sa get_l3_way_size().
+ */
+struct gen_l3_config {
+   unsigned n[GEN_NUM_L3P];
+};
+
+/**
+ * L3 configuration represented as a vector of weights giving the desired
+ * relative size of each partition.  The scale is arbitrary, only the ratios
+ * between weights will have an influence on the selection of the closest L3
+ * configuration.
+ */
+struct gen_l3_weights {
+   float w[GEN_NUM_L3P];
+};
+
+float gen_diff_l3_weights(struct gen_l3_weights w0, struct gen_l3_weights w1);
+
+struct gen_l3_weights
+gen_get_default_l3_weights(const struct gen_device_info *devinfo,
+                           bool needs_dc, bool needs_slm);
+
+struct gen_l3_weights
+gen_get_l3_config_weights(const struct gen_l3_config *cfg);
+
+const struct gen_l3_config *
+gen_get_default_l3_config(const struct gen_device_info *devinfo);
+
+const struct gen_l3_config *
+gen_get_l3_config(const struct gen_device_info *devinfo,
+                  struct gen_l3_weights w0);
+
+unsigned
+gen_get_l3_config_urb_size(const struct gen_device_info *devinfo,
+                           const struct gen_l3_config *cfg);
+
+void gen_dump_l3_config(const struct gen_l3_config *cfg, FILE *fp);
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 829e78d..e7c90b7 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -734,7 +734,7 @@ enum brw_predicate_state {
 
 struct shader_times;
 
-struct brw_l3_config;
+struct gen_l3_config;
 
 /**
  * brw_context is derived from gl_context.
@@ -1317,7 +1317,7 @@ struct brw_context
    int baseinstance;
 
    struct {
-      const struct brw_l3_config *config;
+      const struct gen_l3_config *config;
    } l3;
 
    struct {
diff --git a/src/mesa/drivers/dri/i965/gen7_l3_state.c b/src/mesa/drivers/dri/i965/gen7_l3_state.c
index 741ab77..75a2983 100644
--- a/src/mesa/drivers/dri/i965/gen7_l3_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_l3_state.c
@@ -21,280 +21,21 @@
  * IN THE SOFTWARE.
  */
 
+#include "common/gen_l3_config.h"
+
 #include "brw_context.h"
 #include "brw_defines.h"
 #include "brw_state.h"
 #include "intel_batchbuffer.h"
 
 /**
- * Chunk of L3 cache reserved for some specific purpose.
- */
-enum brw_l3_partition {
-   /** Shared local memory. */
-   L3P_SLM = 0,
-   /** Unified return buffer. */
-   L3P_URB,
-   /** Union of DC and RO. */
-   L3P_ALL,
-   /** Data cluster RW partition. */
-   L3P_DC,
-   /** Union of IS, C and T. */
-   L3P_RO,
-   /** Instruction and state cache. */
-   L3P_IS,
-   /** Constant cache. */
-   L3P_C,
-   /** Texture cache. */
-   L3P_T,
-   /** Number of supported L3 partitions. */
-   NUM_L3P
-};
-
-/**
- * L3 configuration represented as the number of ways allocated for each
- * partition.  \sa get_l3_way_size().
- */
-struct brw_l3_config {
-   unsigned n[NUM_L3P];
-};
-
-/**
- * IVB/HSW validated L3 configurations.  The first entry will be used as
- * default by gen7_restore_default_l3_config(), otherwise the ordering is
- * unimportant.
- */
-static const struct brw_l3_config ivb_l3_configs[] = {
-   /* SLM URB ALL DC  RO  IS   C   T */
-   {{  0, 32,  0,  0, 32,  0,  0,  0 }},
-   {{  0, 32,  0, 16, 16,  0,  0,  0 }},
-   {{  0, 32,  0,  4,  0,  8,  4, 16 }},
-   {{  0, 28,  0,  8,  0,  8,  4, 16 }},
-   {{  0, 28,  0, 16,  0,  8,  4,  8 }},
-   {{  0, 28,  0,  8,  0, 16,  4,  8 }},
-   {{  0, 28,  0,  0,  0, 16,  4, 16 }},
-   {{  0, 32,  0,  0,  0, 16,  0, 16 }},
-   {{  0, 28,  0,  4, 32,  0,  0,  0 }},
-   {{ 16, 16,  0, 16, 16,  0,  0,  0 }},
-   {{ 16, 16,  0,  8,  0,  8,  8,  8 }},
-   {{ 16, 16,  0,  4,  0,  8,  4, 16 }},
-   {{ 16, 16,  0,  4,  0, 16,  4,  8 }},
-   {{ 16, 16,  0,  0, 32,  0,  0,  0 }},
-   {{ 0 }}
-};
-
-/**
- * VLV validated L3 configurations.  \sa ivb_l3_configs.
- */
-static const struct brw_l3_config vlv_l3_configs[] = {
-   /* SLM URB ALL DC  RO  IS   C   T */
-   {{  0, 64,  0,  0, 32,  0,  0,  0 }},
-   {{  0, 80,  0,  0, 16,  0,  0,  0 }},
-   {{  0, 80,  0,  8,  8,  0,  0,  0 }},
-   {{  0, 64,  0, 16, 16,  0,  0,  0 }},
-   {{  0, 60,  0,  4, 32,  0,  0,  0 }},
-   {{ 32, 32,  0, 16, 16,  0,  0,  0 }},
-   {{ 32, 40,  0,  8, 16,  0,  0,  0 }},
-   {{ 32, 40,  0, 16,  8,  0,  0,  0 }},
-   {{ 0 }}
-};
-
-/**
- * BDW validated L3 configurations.  \sa ivb_l3_configs.
- */
-static const struct brw_l3_config bdw_l3_configs[] = {
-   /* SLM URB ALL DC  RO  IS   C   T */
-   {{  0, 48, 48,  0,  0,  0,  0,  0 }},
-   {{  0, 48,  0, 16, 32,  0,  0,  0 }},
-   {{  0, 32,  0, 16, 48,  0,  0,  0 }},
-   {{  0, 32,  0,  0, 64,  0,  0,  0 }},
-   {{  0, 32, 64,  0,  0,  0,  0,  0 }},
-   {{ 24, 16, 48,  0,  0,  0,  0,  0 }},
-   {{ 24, 16,  0, 16, 32,  0,  0,  0 }},
-   {{ 24, 16,  0, 32, 16,  0,  0,  0 }},
-   {{ 0 }}
-};
-
-/**
- * CHV/SKL validated L3 configurations.  \sa ivb_l3_configs.
- */
-static const struct brw_l3_config chv_l3_configs[] = {
-   /* SLM URB ALL DC  RO  IS   C   T */
-   {{  0, 48, 48,  0,  0,  0,  0,  0 }},
-   {{  0, 48,  0, 16, 32,  0,  0,  0 }},
-   {{  0, 32,  0, 16, 48,  0,  0,  0 }},
-   {{  0, 32,  0,  0, 64,  0,  0,  0 }},
-   {{  0, 32, 64,  0,  0,  0,  0,  0 }},
-   {{ 32, 16, 48,  0,  0,  0,  0,  0 }},
-   {{ 32, 16,  0, 16, 32,  0,  0,  0 }},
-   {{ 32, 16,  0, 32, 16,  0,  0,  0 }},
-   {{ 0 }}
-};
-
-/**
- * Return a zero-terminated array of validated L3 configurations for the
- * specified device.
- */
-static const struct brw_l3_config *
-get_l3_configs(const struct gen_device_info *devinfo)
-{
-   switch (devinfo->gen) {
-   case 7:
-      return (devinfo->is_baytrail ? vlv_l3_configs : ivb_l3_configs);
-
-   case 8:
-      return (devinfo->is_cherryview ? chv_l3_configs : bdw_l3_configs);
-
-   case 9:
-      return chv_l3_configs;
-
-   default:
-      unreachable("Not implemented");
-   }
-}
-
-/**
- * Return the size of an L3 way in KB.
- */
-static unsigned
-get_l3_way_size(const struct gen_device_info *devinfo)
-{
-   if (devinfo->is_baytrail)
-      return 2;
-
-   else if (devinfo->is_cherryview || devinfo->gt == 1)
-      return 4;
-
-   else
-      return 8 * devinfo->num_slices;
-}
-
-/**
- * L3 configuration represented as a vector of weights giving the desired
- * relative size of each partition.  The scale is arbitrary, only the ratios
- * between weights will have an influence on the selection of the closest L3
- * configuration.
- */
-struct brw_l3_weights {
-   float w[NUM_L3P];
-};
-
-/**
- * L1-normalize a vector of L3 partition weights.
- */
-static struct brw_l3_weights
-norm_l3_weights(struct brw_l3_weights w)
-{
-   float sz = 0;
-
-   for (unsigned i = 0; i < NUM_L3P; i++)
-      sz += w.w[i];
-
-   for (unsigned i = 0; i < NUM_L3P; i++)
-      w.w[i] /= sz;
-
-   return w;
-}
-
-/**
- * Get the relative partition weights of the specified L3 configuration.
- */
-static struct brw_l3_weights
-get_config_l3_weights(const struct brw_l3_config *cfg)
-{
-   if (cfg) {
-      struct brw_l3_weights w;
-
-      for (unsigned i = 0; i < NUM_L3P; i++)
-         w.w[i] = cfg->n[i];
-
-      return norm_l3_weights(w);
-   } else {
-      const struct brw_l3_weights w = { { 0 } };
-      return w;
-   }
-}
-
-/**
- * Distance between two L3 configurations represented as vectors of weights.
- * Usually just the L1 metric except when the two configurations are
- * considered incompatible in which case the distance will be infinite.  Note
- * that the compatibility condition is asymmetric -- They will be considered
- * incompatible whenever the reference configuration \p w0 requires SLM, DC,
- * or URB but \p w1 doesn't provide it.
- */
-static float
-diff_l3_weights(struct brw_l3_weights w0, struct brw_l3_weights w1)
-{
-   if ((w0.w[L3P_SLM] && !w1.w[L3P_SLM]) ||
-       (w0.w[L3P_DC] && !w1.w[L3P_DC] && !w1.w[L3P_ALL]) ||
-       (w0.w[L3P_URB] && !w1.w[L3P_URB])) {
-      return HUGE_VALF;
-
-   } else {
-      float dw = 0;
-
-      for (unsigned i = 0; i < NUM_L3P; i++)
-         dw += fabs(w0.w[i] - w1.w[i]);
-
-      return dw;
-   }
-}
-
-/**
- * Return the closest validated L3 configuration for the specified device and
- * weight vector.
- */
-static const struct brw_l3_config *
-get_l3_config(const struct gen_device_info *devinfo, struct brw_l3_weights w0)
-{
-   const struct brw_l3_config *const cfgs = get_l3_configs(devinfo);
-   const struct brw_l3_config *cfg_best = NULL;
-   float dw_best = HUGE_VALF;
-
-   for (const struct brw_l3_config *cfg = cfgs; cfg->n[L3P_URB]; cfg++) {
-      const float dw = diff_l3_weights(w0, get_config_l3_weights(cfg));
-
-      if (dw < dw_best) {
-         cfg_best = cfg;
-         dw_best = dw;
-      }
-   }
-
-   return cfg_best;
-}
-
-/**
- * Return a reasonable default L3 configuration for the specified device based
- * on whether SLM and DC are required.  In the non-SLM non-DC case the result
- * is intended to approximately resemble the hardware defaults.
- */
-static struct brw_l3_weights
-get_default_l3_weights(const struct gen_device_info *devinfo,
-                       bool needs_dc, bool needs_slm)
-{
-   struct brw_l3_weights w = {{ 0 }};
-
-   w.w[L3P_SLM] = needs_slm;
-   w.w[L3P_URB] = 1.0;
-
-   if (devinfo->gen >= 8) {
-      w.w[L3P_ALL] = 1.0;
-   } else {
-      w.w[L3P_DC] = needs_dc ? 0.1 : 0;
-      w.w[L3P_RO] = devinfo->is_baytrail ? 0.5 : 1.0;
-   }
-
-   return norm_l3_weights(w);
-}
-
-/**
  * Calculate the desired L3 partitioning based on the current state of the
  * pipeline.  For now this simply returns the conservative defaults calculated
  * by get_default_l3_weights(), but we could probably do better by gathering
  * more statistics from the pipeline state (e.g. guess of expected URB usage
  * and bound surfaces), or by using feed-back from performance counters.
  */
-static struct brw_l3_weights
+static struct gen_l3_weights
 get_pipeline_state_l3_weights(const struct brw_context *brw)
 {
    const struct brw_stage_state *stage_states[] = {
@@ -317,21 +58,24 @@ get_pipeline_state_l3_weights(const struct brw_context *brw)
       needs_slm |= prog_data && prog_data->total_shared;
    }
 
-   return get_default_l3_weights(brw->intelScreen->devinfo,
-                                 needs_dc, needs_slm);
+   return gen_get_default_l3_weights(brw->intelScreen->devinfo,
+                                     needs_dc, needs_slm);
 }
 
 /**
  * Program the hardware to use the specified L3 configuration.
  */
 static void
-setup_l3_config(struct brw_context *brw, const struct brw_l3_config *cfg)
+setup_l3_config(struct brw_context *brw, const struct gen_l3_config *cfg)
 {
-   const bool has_dc = cfg->n[L3P_DC] || cfg->n[L3P_ALL];
-   const bool has_is = cfg->n[L3P_IS] || cfg->n[L3P_RO] || cfg->n[L3P_ALL];
-   const bool has_c = cfg->n[L3P_C] || cfg->n[L3P_RO] || cfg->n[L3P_ALL];
-   const bool has_t = cfg->n[L3P_T] || cfg->n[L3P_RO] || cfg->n[L3P_ALL];
-   const bool has_slm = cfg->n[L3P_SLM];
+   const bool has_dc = cfg->n[GEN_L3P_DC] || cfg->n[GEN_L3P_ALL];
+   const bool has_is = cfg->n[GEN_L3P_IS] || cfg->n[GEN_L3P_RO] ||
+                       cfg->n[GEN_L3P_ALL];
+   const bool has_c = cfg->n[GEN_L3P_C] || cfg->n[GEN_L3P_RO] ||
+                      cfg->n[GEN_L3P_ALL];
+   const bool has_t = cfg->n[GEN_L3P_T] || cfg->n[GEN_L3P_RO] ||
+                      cfg->n[GEN_L3P_ALL];
+   const bool has_slm = cfg->n[GEN_L3P_SLM];
 
    /* According to the hardware docs, the L3 partitioning can only be changed
     * while the pipeline is completely drained and the caches are flushed,
@@ -372,7 +116,7 @@ setup_l3_config(struct brw_context *brw, const struct brw_l3_config *cfg)
                                PIPE_CONTROL_CS_STALL);
 
    if (brw->gen >= 8) {
-      assert(!cfg->n[L3P_IS] && !cfg->n[L3P_C] && !cfg->n[L3P_T]);
+      assert(!cfg->n[GEN_L3P_IS] && !cfg->n[GEN_L3P_C] && !cfg->n[GEN_L3P_T]);
 
       BEGIN_BATCH(3);
       OUT_BATCH(MI_LOAD_REGISTER_IMM | (3 - 2));
@@ -380,15 +124,15 @@ setup_l3_config(struct brw_context *brw, const struct brw_l3_config *cfg)
       /* Set up the L3 partitioning. */
       OUT_BATCH(GEN8_L3CNTLREG);
       OUT_BATCH((has_slm ? GEN8_L3CNTLREG_SLM_ENABLE : 0) |
-                SET_FIELD(cfg->n[L3P_URB], GEN8_L3CNTLREG_URB_ALLOC) |
-                SET_FIELD(cfg->n[L3P_RO], GEN8_L3CNTLREG_RO_ALLOC) |
-                SET_FIELD(cfg->n[L3P_DC], GEN8_L3CNTLREG_DC_ALLOC) |
-                SET_FIELD(cfg->n[L3P_ALL], GEN8_L3CNTLREG_ALL_ALLOC));
+                SET_FIELD(cfg->n[GEN_L3P_URB], GEN8_L3CNTLREG_URB_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_RO], GEN8_L3CNTLREG_RO_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_DC], GEN8_L3CNTLREG_DC_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_ALL], GEN8_L3CNTLREG_ALL_ALLOC));
 
       ADVANCE_BATCH();
 
    } else {
-      assert(!cfg->n[L3P_ALL]);
+      assert(!cfg->n[GEN_L3P_ALL]);
 
       /* When enabled SLM only uses a portion of the L3 on half of the banks,
        * the matching space on the remaining banks has to be allocated to a
@@ -396,11 +140,11 @@ setup_l3_config(struct brw_context *brw, const struct brw_l3_config *cfg)
        * lower-bandwidth 2-bank address hashing mode.
        */
       const bool urb_low_bw = has_slm && !brw->is_baytrail;
-      assert(!urb_low_bw || cfg->n[L3P_URB] == cfg->n[L3P_SLM]);
+      assert(!urb_low_bw || cfg->n[GEN_L3P_URB] == cfg->n[GEN_L3P_SLM]);
 
       /* Minimum number of ways that can be allocated to the URB. */
       const unsigned n0_urb = (brw->is_baytrail ? 32 : 0);
-      assert(cfg->n[L3P_URB] >= n0_urb);
+      assert(cfg->n[GEN_L3P_URB] >= n0_urb);
 
       BEGIN_BATCH(7);
       OUT_BATCH(MI_LOAD_REGISTER_IMM | (7 - 2));
@@ -418,15 +162,15 @@ setup_l3_config(struct brw_context *brw, const struct brw_l3_config *cfg)
       /* Set up the L3 partitioning. */
       OUT_BATCH(GEN7_L3CNTLREG2);
       OUT_BATCH((has_slm ? GEN7_L3CNTLREG2_SLM_ENABLE : 0) |
-                SET_FIELD(cfg->n[L3P_URB] - n0_urb, GEN7_L3CNTLREG2_URB_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_URB] - n0_urb, GEN7_L3CNTLREG2_URB_ALLOC) |
                 (urb_low_bw ? GEN7_L3CNTLREG2_URB_LOW_BW : 0) |
-                SET_FIELD(cfg->n[L3P_ALL], GEN7_L3CNTLREG2_ALL_ALLOC) |
-                SET_FIELD(cfg->n[L3P_RO], GEN7_L3CNTLREG2_RO_ALLOC) |
-                SET_FIELD(cfg->n[L3P_DC], GEN7_L3CNTLREG2_DC_ALLOC));
+                SET_FIELD(cfg->n[GEN_L3P_ALL], GEN7_L3CNTLREG2_ALL_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_RO], GEN7_L3CNTLREG2_RO_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_DC], GEN7_L3CNTLREG2_DC_ALLOC));
       OUT_BATCH(GEN7_L3CNTLREG3);
-      OUT_BATCH(SET_FIELD(cfg->n[L3P_IS], GEN7_L3CNTLREG3_IS_ALLOC) |
-                SET_FIELD(cfg->n[L3P_C], GEN7_L3CNTLREG3_C_ALLOC) |
-                SET_FIELD(cfg->n[L3P_T], GEN7_L3CNTLREG3_T_ALLOC));
+      OUT_BATCH(SET_FIELD(cfg->n[GEN_L3P_IS], GEN7_L3CNTLREG3_IS_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_C], GEN7_L3CNTLREG3_C_ALLOC) |
+                SET_FIELD(cfg->n[GEN_L3P_T], GEN7_L3CNTLREG3_T_ALLOC));
 
       ADVANCE_BATCH();
 
@@ -447,35 +191,14 @@ setup_l3_config(struct brw_context *brw, const struct brw_l3_config *cfg)
 }
 
 /**
- * Return the unit brw_context::urb::size is expressed in, in KB.  \sa
- * gen_device_info::urb::size.
- */
-static unsigned
-get_urb_size_scale(const struct gen_device_info *devinfo)
-{
-   return (devinfo->gen >= 8 ? devinfo->num_slices : 1);
-}
-
-/**
  * Update the URB size in the context state for the specified L3
  * configuration.
  */
 static void
-update_urb_size(struct brw_context *brw, const struct brw_l3_config *cfg)
+update_urb_size(struct brw_context *brw, const struct gen_l3_config *cfg)
 {
    const struct gen_device_info *devinfo = brw->intelScreen->devinfo;
-   /* From the SKL "L3 Allocation and Programming" documentation:
-    *
-    * "URB is limited to 1008KB due to programming restrictions.  This is not
-    * a restriction of the L3 implementation, but of the FF and other clients.
-    * Therefore, in a GT4 implementation it is possible for the programmed
-    * allocation of the L3 data array to provide 3*384KB=1152KB for URB, but
-    * only 1008KB of this will be used."
-    */
-   const unsigned max = (devinfo->gen == 9 ? 1008 : ~0);
-   const unsigned sz =
-      MIN2(max, cfg->n[L3P_URB] * get_l3_way_size(devinfo)) /
-      get_urb_size_scale(devinfo);
+   const unsigned sz = gen_get_l3_config_urb_size(devinfo, cfg);
 
    if (brw->urb.size != sz) {
       brw->urb.size = sz;
@@ -483,23 +206,11 @@ update_urb_size(struct brw_context *brw, const struct brw_l3_config *cfg)
    }
 }
 
-/**
- * Print out the specified L3 configuration.
- */
-static void
-dump_l3_config(const struct brw_l3_config *cfg)
-{
-   fprintf(stderr, "SLM=%d URB=%d ALL=%d DC=%d RO=%d IS=%d C=%d T=%d\n",
-           cfg->n[L3P_SLM], cfg->n[L3P_URB], cfg->n[L3P_ALL],
-           cfg->n[L3P_DC], cfg->n[L3P_RO],
-           cfg->n[L3P_IS], cfg->n[L3P_C], cfg->n[L3P_T]);
-}
-
 static void
 emit_l3_state(struct brw_context *brw)
 {
-   const struct brw_l3_weights w = get_pipeline_state_l3_weights(brw);
-   const float dw = diff_l3_weights(w, get_config_l3_weights(brw->l3.config));
+   const struct gen_l3_weights w = get_pipeline_state_l3_weights(brw);
+   const float dw = gen_diff_l3_weights(w, gen_get_l3_config_weights(brw->l3.config));
    /* The distance between any two compatible weight vectors cannot exceed two
     * due to the triangle inequality.
     */
@@ -518,8 +229,8 @@ emit_l3_state(struct brw_context *brw)
                                small_dw_threshold : large_dw_threshold);
 
    if (dw > dw_threshold && brw->can_do_pipelined_register_writes) {
-      const struct brw_l3_config *const cfg =
-         get_l3_config(brw->intelScreen->devinfo, w);
+      const struct gen_l3_config *const cfg =
+         gen_get_l3_config(brw->intelScreen->devinfo, w);
 
       setup_l3_config(brw, cfg);
       update_urb_size(brw, cfg);
@@ -527,7 +238,7 @@ emit_l3_state(struct brw_context *brw)
 
       if (unlikely(INTEL_DEBUG & DEBUG_L3)) {
          fprintf(stderr, "L3 config transition (%f > %f): ", dw, dw_threshold);
-         dump_l3_config(cfg);
+         gen_dump_l3_config(cfg, stderr);
       }
    }
 }
@@ -582,12 +293,7 @@ void
 gen7_restore_default_l3_config(struct brw_context *brw)
 {
    const struct gen_device_info *devinfo = brw->intelScreen->devinfo;
-   /* For efficiency assume that the first entry of the array matches the
-    * default configuration.
-    */
-   const struct brw_l3_config *const cfg = get_l3_configs(devinfo);
-   assert(cfg == get_l3_config(devinfo,
-                               get_default_l3_weights(devinfo, false, false)));
+   const struct gen_l3_config *const cfg = gen_get_default_l3_config(devinfo);
 
    if (cfg != brw->l3.config && brw->can_do_pipelined_register_writes) {
       setup_l3_config(brw, cfg);