[PATCH 6.12 065/172] drm/amdkfd: hard-code cacheline size for gfx11

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

6.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Harish Kasiviswanathan <Harish.Kasiviswanathan@xxxxxxx>

commit 321048c4a3e375416b51b4093978f9ce2aa4d391 upstream.

This information is not available in ip discovery table.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@xxxxxxx>
Reviewed-by: David Belanger <david.belanger@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdkfd/kfd_crat.c |   22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -1422,6 +1422,7 @@ err:
 
 
 static int kfd_fill_gpu_cache_info_from_gfx_config(struct kfd_dev *kdev,
+						   bool cache_line_size_missing,
 						   struct kfd_gpu_cache_info *pcache_info)
 {
 	struct amdgpu_device *adev = kdev->adev;
@@ -1436,6 +1437,8 @@ static int kfd_fill_gpu_cache_info_from_
 					CRAT_CACHE_FLAGS_SIMD_CACHE);
 		pcache_info[i].num_cu_shared = adev->gfx.config.gc_num_tcp_per_wpg / 2;
 		pcache_info[i].cache_line_size = adev->gfx.config.gc_tcp_cache_line_size;
+		if (cache_line_size_missing && !pcache_info[i].cache_line_size)
+			pcache_info[i].cache_line_size = 128;
 		i++;
 	}
 	/* Scalar L1 Instruction Cache per SQC */
@@ -1448,6 +1451,8 @@ static int kfd_fill_gpu_cache_info_from_
 					CRAT_CACHE_FLAGS_SIMD_CACHE);
 		pcache_info[i].num_cu_shared = adev->gfx.config.gc_num_sqc_per_wgp * 2;
 		pcache_info[i].cache_line_size = adev->gfx.config.gc_instruction_cache_line_size;
+		if (cache_line_size_missing && !pcache_info[i].cache_line_size)
+			pcache_info[i].cache_line_size = 128;
 		i++;
 	}
 	/* Scalar L1 Data Cache per SQC */
@@ -1459,6 +1464,8 @@ static int kfd_fill_gpu_cache_info_from_
 					CRAT_CACHE_FLAGS_SIMD_CACHE);
 		pcache_info[i].num_cu_shared = adev->gfx.config.gc_num_sqc_per_wgp * 2;
 		pcache_info[i].cache_line_size = adev->gfx.config.gc_scalar_data_cache_line_size;
+		if (cache_line_size_missing && !pcache_info[i].cache_line_size)
+			pcache_info[i].cache_line_size = 64;
 		i++;
 	}
 	/* GL1 Data Cache per SA */
@@ -1471,7 +1478,8 @@ static int kfd_fill_gpu_cache_info_from_
 					CRAT_CACHE_FLAGS_DATA_CACHE |
 					CRAT_CACHE_FLAGS_SIMD_CACHE);
 		pcache_info[i].num_cu_shared = adev->gfx.config.max_cu_per_sh;
-		pcache_info[i].cache_line_size = 0;
+		if (cache_line_size_missing)
+			pcache_info[i].cache_line_size = 128;
 		i++;
 	}
 	/* L2 Data Cache per GPU (Total Tex Cache) */
@@ -1483,6 +1491,8 @@ static int kfd_fill_gpu_cache_info_from_
 					CRAT_CACHE_FLAGS_SIMD_CACHE);
 		pcache_info[i].num_cu_shared = adev->gfx.config.max_cu_per_sh;
 		pcache_info[i].cache_line_size = adev->gfx.config.gc_tcc_cache_line_size;
+		if (cache_line_size_missing && !pcache_info[i].cache_line_size)
+			pcache_info[i].cache_line_size = 128;
 		i++;
 	}
 	/* L3 Data Cache per GPU */
@@ -1568,6 +1578,7 @@ static int kfd_fill_gpu_cache_info_from_
 int kfd_get_gpu_cache_info(struct kfd_node *kdev, struct kfd_gpu_cache_info **pcache_info)
 {
 	int num_of_cache_types = 0;
+	bool cache_line_size_missing = false;
 
 	switch (kdev->adev->asic_type) {
 	case CHIP_KAVERI:
@@ -1691,10 +1702,17 @@ int kfd_get_gpu_cache_info(struct kfd_no
 		case IP_VERSION(11, 5, 0):
 		case IP_VERSION(11, 5, 1):
 		case IP_VERSION(11, 5, 2):
+			/* Cacheline size not available in IP discovery for gc11.
+			 * kfd_fill_gpu_cache_info_from_gfx_config to hard code it
+			 */
+			cache_line_size_missing = true;
+			fallthrough;
 		case IP_VERSION(12, 0, 0):
 		case IP_VERSION(12, 0, 1):
 			num_of_cache_types =
-				kfd_fill_gpu_cache_info_from_gfx_config(kdev->kfd, *pcache_info);
+				kfd_fill_gpu_cache_info_from_gfx_config(kdev->kfd,
+									cache_line_size_missing,
+									*pcache_info);
 			break;
 		default:
 			*pcache_info = dummy_cache_info;