From beb680aae431fe2ba36594a8aec004e1e1aeb004 Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Date: Thu, 18 Mar 2021 11:03:35 +0200
Subject: [PATCH] intel/dev: store size of CS prefetch
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Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9679>
---
 src/intel/dev/gen_device_info.c      | 19 +++++++++++++++----
 src/intel/dev/gen_device_info.h      |  6 ++++++
 src/intel/dev/gen_device_info_test.c |  1 +
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/intel/dev/gen_device_info.c b/src/intel/dev/gen_device_info.c
index 5fb02946669..ad2a8be69ac 100644
--- a/src/intel/dev/gen_device_info.c
+++ b/src/intel/dev/gen_device_info.c
@@ -86,6 +86,7 @@ gen_device_name_to_pci_device_id(const char *name)
 static const struct gen_device_info gen_device_info_gen3 = {
    .gen = 3,
    .simulator_id = -1,
+   .cs_prefetch_size = 512,
 };
 
 static const struct gen_device_info gen_device_info_i965 = {
@@ -103,6 +104,7 @@ static const struct gen_device_info gen_device_info_i965 = {
    },
    .timestamp_frequency = 12500000,
    .simulator_id = -1,
+   .cs_prefetch_size = 512,
 };
 
 static const struct gen_device_info gen_device_info_g4x = {
@@ -124,6 +126,7 @@ static const struct gen_device_info gen_device_info_g4x = {
    },
    .timestamp_frequency = 12500000,
    .simulator_id = -1,
+   .cs_prefetch_size = 512,
 };
 
 static const struct gen_device_info gen_device_info_ilk = {
@@ -143,6 +146,7 @@ static const struct gen_device_info gen_device_info_ilk = {
    },
    .timestamp_frequency = 12500000,
    .simulator_id = -1,
+   .cs_prefetch_size = 512,
 };
 
 static const struct gen_device_info gen_device_info_snb_gt1 = {
@@ -172,6 +176,7 @@ static const struct gen_device_info gen_device_info_snb_gt1 = {
    },
    .timestamp_frequency = 12500000,
    .simulator_id = -1,
+   .cs_prefetch_size = 512,
 };
 
 static const struct gen_device_info gen_device_info_snb_gt2 = {
@@ -201,6 +206,7 @@ static const struct gen_device_info gen_device_info_snb_gt2 = {
    },
    .timestamp_frequency = 12500000,
    .simulator_id = -1,
+   .cs_prefetch_size = 512,
 };
 
 #define GEN7_FEATURES                               \
@@ -211,7 +217,8 @@ static const struct gen_device_info gen_device_info_snb_gt2 = {
    .has_pln = true,                                 \
    .has_64bit_float = true,                         \
    .has_surface_tile_offset = true,                 \
-   .timestamp_frequency = 12500000
+   .timestamp_frequency = 12500000,                 \
+   .cs_prefetch_size = 512
 
 static const struct gen_device_info gen_device_info_ivb_gt1 = {
    GEN7_FEATURES, .is_ivybridge = true, .gt = 1,
@@ -412,7 +419,8 @@ static const struct gen_device_info gen_device_info_hsw_gt3 = {
    .max_tes_threads = 504,                          \
    .max_gs_threads = 504,                           \
    .max_wm_threads = 384,                           \
-   .timestamp_frequency = 12500000
+   .timestamp_frequency = 12500000,                 \
+   .cs_prefetch_size = 512
 
 static const struct gen_device_info gen_device_info_bdw_gt1 = {
    GEN8_FEATURES, .gt = 1,
@@ -521,6 +529,7 @@ static const struct gen_device_info gen_device_info_chv = {
    .max_tes_threads = 336,                          \
    .max_cs_threads = 56,                            \
    .timestamp_frequency = 12000000,                 \
+   .cs_prefetch_size = 512,                         \
    .urb = {                                         \
       .min_entries = {                              \
          [MESA_SHADER_VERTEX]    = 64,              \
@@ -804,7 +813,8 @@ static const struct gen_device_info gen_device_info_cfl_gt3 = {
    .max_gs_threads = 224,                           \
    .max_tcs_threads = 224,                          \
    .max_tes_threads = 364,                          \
-   .max_cs_threads = 56
+   .max_cs_threads = 56,                            \
+   .cs_prefetch_size = 512
 
 #define GEN11_FEATURES(_gt, _slices, _subslices, _l3) \
    GEN8_FEATURES,                                     \
@@ -937,7 +947,8 @@ static const struct gen_device_info gen_device_info_ehl_2x4 = {
    .has_integer_dword_mul = false,                              \
    .gt = _gt, .num_slices = _slices, .l3_banks = _l3,           \
    .simulator_id = 22,                                          \
-   .num_eu_per_subslice = 16
+   .num_eu_per_subslice = 16,                                   \
+   .cs_prefetch_size = 512
 
 #define dual_subslices(args...) { args, }
 
diff --git a/src/intel/dev/gen_device_info.h b/src/intel/dev/gen_device_info.h
index 4b3db81ad4a..3fdeeb08da9 100644
--- a/src/intel/dev/gen_device_info.h
+++ b/src/intel/dev/gen_device_info.h
@@ -236,6 +236,12 @@ struct gen_device_info
       unsigned max_entries[4];
    } urb;
 
+   /**
+    * Size of the command streamer prefetch. This is important to know for
+    * self modifying batches.
+    */
+   unsigned cs_prefetch_size;
+
    /**
     * For the longest time the timestamp frequency for Gen's timestamp counter
     * could be assumed to be 12.5MHz, where the least significant bit neatly
diff --git a/src/intel/dev/gen_device_info_test.c b/src/intel/dev/gen_device_info_test.c
index f104163db69..3079fdefa19 100644
--- a/src/intel/dev/gen_device_info_test.c
+++ b/src/intel/dev/gen_device_info_test.c
@@ -27,6 +27,7 @@ main(int argc, char *argv[])
       assert(devinfo.num_eu_per_subslice != 0);
       assert(devinfo.num_thread_per_eu != 0);
       assert(devinfo.timestamp_frequency != 0);
+      assert(devinfo.cs_prefetch_size > 0);
    }
 
    return 0;