[PATCH 11/11] drm/amdkfd: add helper to generate cache info from gfx config

[Zhang, Hawking]

[AMD Official Use Only - General]

Series is

Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>

Regards,
Hawking
-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Alex Deucher
Sent: Wednesday, April 27, 2022 02:27
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>
Subject: [PATCH 11/11] drm/amdkfd: add helper to generate cache info from gfx config

Rather than using hardcoded tables, we can use the gfx and gmc config pulled from the IP discovery table to generate the cache configuration.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 72 +++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index afc8a7fcdad8..a3275139aaf4 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -1315,6 +1315,78 @@ static int fill_in_l2_l3_pcache(struct crat_subtype_cache *pcache,
        return 1;
 }

+static int kfd_fill_gpu_cache_info_from_gfx_config(struct kfd_dev *kdev,
+                                                  struct kfd_gpu_cache_info *pcache_info) {
+       struct amdgpu_device *adev = kdev->adev;
+       int i = 0;
+
+       /* TCP L1 Cache per CU */
+       if (adev->gfx.config.gc_tcp_l1_size) {
+               pcache_info[i].cache_size = adev->gfx.config.gc_tcp_l1_size;
+               pcache_info[i].cache_level = 1;
+               pcache_info[i].flags = (CRAT_CACHE_FLAGS_ENABLED |
+                                       CRAT_CACHE_FLAGS_DATA_CACHE |
+                                       CRAT_CACHE_FLAGS_SIMD_CACHE);
+               pcache_info[0].num_cu_shared = adev->gfx.config.gc_num_tcp_per_wpg / 2;
+               i++;
+       }
+       /* Scalar L1 Instruction Cache per SQC */
+       if (adev->gfx.config.gc_l1_instruction_cache_size_per_sqc) {
+               pcache_info[i].cache_size =
+                       adev->gfx.config.gc_l1_instruction_cache_size_per_sqc;
+               pcache_info[i].cache_level = 1;
+               pcache_info[i].flags = (CRAT_CACHE_FLAGS_ENABLED |
+                                       CRAT_CACHE_FLAGS_INST_CACHE |
+                                       CRAT_CACHE_FLAGS_SIMD_CACHE);
+               pcache_info[i].num_cu_shared = adev->gfx.config.gc_num_sqc_per_wgp * 2;
+               i++;
+       }
+       /* Scalar L1 Data Cache per SQC */
+       if (adev->gfx.config.gc_l1_data_cache_size_per_sqc) {
+               pcache_info[i].cache_size = adev->gfx.config.gc_l1_data_cache_size_per_sqc;
+               pcache_info[i].cache_level = 1;
+               pcache_info[i].flags = (CRAT_CACHE_FLAGS_ENABLED |
+                                       CRAT_CACHE_FLAGS_DATA_CACHE |
+                                       CRAT_CACHE_FLAGS_SIMD_CACHE);
+               pcache_info[i].num_cu_shared = adev->gfx.config.gc_num_sqc_per_wgp * 2;
+               i++;
+       }
+       /* GL1 Data Cache per SA */
+       if (adev->gfx.config.gc_gl1c_per_sa &&
+           adev->gfx.config.gc_gl1c_size_per_instance) {
+               pcache_info[i].cache_size = adev->gfx.config.gc_gl1c_per_sa *
+                       adev->gfx.config.gc_gl1c_size_per_instance;
+               pcache_info[i].cache_level = 1;
+               pcache_info[i].flags = (CRAT_CACHE_FLAGS_ENABLED |
+                                       CRAT_CACHE_FLAGS_DATA_CACHE |
+                                       CRAT_CACHE_FLAGS_SIMD_CACHE);
+               pcache_info[i].num_cu_shared = adev->gfx.config.max_cu_per_sh;
+               i++;
+       }
+       /* L2 Data Cache per GPU (Total Tex Cache) */
+       if (adev->gfx.config.gc_gl2c_per_gpu) {
+               pcache_info[i].cache_size = adev->gfx.config.gc_gl2c_per_gpu;
+               pcache_info[i].cache_level = 2;
+               pcache_info[i].flags = (CRAT_CACHE_FLAGS_ENABLED |
+                                       CRAT_CACHE_FLAGS_DATA_CACHE |
+                                       CRAT_CACHE_FLAGS_SIMD_CACHE);
+               pcache_info[i].num_cu_shared = adev->gfx.config.max_cu_per_sh;
+               i++;
+       }
+       /* L3 Data Cache per GPU */
+       if (adev->gmc.mall_size) {
+               pcache_info[i].cache_size = adev->gmc.mall_size / 1024;
+               pcache_info[i].cache_level = 3;
+               pcache_info[i].flags = (CRAT_CACHE_FLAGS_ENABLED |
+                                       CRAT_CACHE_FLAGS_DATA_CACHE |
+                                       CRAT_CACHE_FLAGS_SIMD_CACHE);
+               pcache_info[i].num_cu_shared = adev->gfx.config.max_cu_per_sh;
+               i++;
+       }
+       return i;
+}
+
 /* kfd_fill_gpu_cache_info - Fill GPU cache info using kfd_gpu_cache_info
  * tables
  *
--
2.35.1