[PATCH 1/2] drm/amdgpu: support get_cu_info for Arcturus

[Alex Deucher]

From: Le Ma <le.ma at amd.com>

This change is because SE/SH layout on Arcturus is 8*1, different from
4*2(or 4*1) on Vega ASICs.

Currently the cu bitmap array is 4x4 size, and besides the bitmap is used widely
across SW stack. To mostly reduce the scale of impact, we make the cu bitmap
array compatible with SE/SH layout on Arcturus. Then the store of cu bits of
each shader array for Arcturus will be like below:
    SE0,SH0 --> bitmap[0][0]
    SE1,SH0 --> bitmap[1][0]
    SE2,SH0 --> bitmap[2][0]
    SE3,SH0 --> bitmap[3][0]
    SE4,SH0 --> bitmap[0][1]
    SE5,SH0 --> bitmap[1][1]
    SE6,SH0 --> bitmap[2][1]
    SE7,SH0 --> bitmap[3][1]

Signed-off-by: Le Ma <le.ma at amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 35 +++++++++++++++++++++------
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 2dbd88b2ce87..a0c64d47760f 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -6349,12 +6349,21 @@ static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
 {
 	int i, j, k, counter, active_cu_number = 0;
 	u32 mask, bitmap, ao_bitmap, ao_cu_mask = 0;
-	unsigned disable_masks[4 * 2];
+	unsigned disable_masks[4 * 4];
 
 	if (!adev || !cu_info)
 		return -EINVAL;
 
-	amdgpu_gfx_parse_disable_cu(disable_masks, 4, 2);
+	/*
+	 * 16 comes from bitmap array size 4*4, and it can cover all gfx9 ASICs
+	 */
+	if (adev->gfx.config.max_shader_engines *
+		adev->gfx.config.max_sh_per_se > 16)
+		return -EINVAL;
+
+	amdgpu_gfx_parse_disable_cu(disable_masks,
+				    adev->gfx.config.max_shader_engines,
+				    adev->gfx.config.max_sh_per_se);
 
 	mutex_lock(&adev->grbm_idx_mutex);
 	for (i = 0; i < adev->gfx.config.max_shader_engines; i++) {
@@ -6363,11 +6372,23 @@ static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
 			ao_bitmap = 0;
 			counter = 0;
 			gfx_v9_0_select_se_sh(adev, i, j, 0xffffffff);
-			if (i < 4 && j < 2)
-				gfx_v9_0_set_user_cu_inactive_bitmap(
-					adev, disable_masks[i * 2 + j]);
+			gfx_v9_0_set_user_cu_inactive_bitmap(
+				adev, disable_masks[i * adev->gfx.config.max_sh_per_se + j]);
 			bitmap = gfx_v9_0_get_cu_active_bitmap(adev);
-			cu_info->bitmap[i][j] = bitmap;
+
+			/*
+			 * The bitmap(and ao_cu_bitmap) in cu_info structure is
+			 * 4x4 size array, and it's usually suitable for Vega
+			 * ASICs which has 4*2 SE/SH layout.
+			 * But for Arcturus, SE/SH layout is changed to 8*1.
+			 * To mostly reduce the impact, we make it compatible
+			 * with current bitmap array as below:
+			 *    SE4,SH0 --> bitmap[0][1]
+			 *    SE5,SH0 --> bitmap[1][1]
+			 *    SE6,SH0 --> bitmap[2][1]
+			 *    SE7,SH0 --> bitmap[3][1]
+			 */
+			cu_info->bitmap[i % 4][j + i / 4] = bitmap;
 
 			for (k = 0; k < adev->gfx.config.max_cu_per_sh; k ++) {
 				if (bitmap & mask) {
@@ -6380,7 +6401,7 @@ static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
 			active_cu_number += counter;
 			if (i < 2 && j < 2)
 				ao_cu_mask |= (ao_bitmap << (i * 16 + j * 8));
-			cu_info->ao_cu_bitmap[i][j] = ao_bitmap;
+			cu_info->ao_cu_bitmap[i % 4][j + i / 4] = ao_bitmap;
 		}
 	}
 	gfx_v9_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
-- 
2.20.1