Uploaded sanitized BC250/ROCm Repository.

patches/patch1_gfxoff.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+"""
+Patch 1: gfx_v10_0.c — Disable GFXOFF for Cyan Skillfish (IP 10.1.3)
+
+Layer 1 of the v3 three-layer protection. Prevents the GPU from entering the
+GFXOFF power-saving state, from which it cannot reliably wake. When the GPU is
+unresponsive, any MMIO register read hangs the CPU indefinitely on the BC-250's
+internal PCIe fabric (no completion timeout).
+
+Usage:
+    python3 patch1_gfxoff.py /path/to/drivers/gpu/drm/amd/amdgpu
+"""
+import sys
+import os
+
+if len(sys.argv) < 2:
+    print("Usage: python3 patch1_gfxoff.py <amdgpu_source_dir>")
+    print("  e.g.: python3 patch1_gfxoff.py ~/kernel-build/linux-6.19.6/drivers/gpu/drm/amd/amdgpu")
+    sys.exit(1)
+
+AMDGPU = sys.argv[1]
+filepath = os.path.join(AMDGPU, "gfx_v10_0.c")
+
+if not os.path.isfile(filepath):
+    print(f"ERROR: File not found: {filepath}")
+    sys.exit(1)
+
+with open(filepath, 'r') as f:
+    content = f.read()
+
+if 'BC-250' in content:
+    print("Already patched, skipping.")
+    sys.exit(0)
+
+# Find gfx_v10_0_check_gfxoff_flag function
+func_start = content.find('static void gfx_v10_0_check_gfxoff_flag')
+if func_start == -1:
+    print("ERROR: gfx_v10_0_check_gfxoff_flag not found")
+    sys.exit(1)
+
+# Find the 'default:' case in the switch inside this function
+func_region_end = func_start + 2000
+default_pos = content.find('\tdefault:', func_start, func_region_end)
+if default_pos == -1:
+    default_pos = content.find('default:', func_start, func_region_end)
+    if default_pos == -1:
+        print("ERROR: default case not found in gfx_v10_0_check_gfxoff_flag")
+        print("Region:", content[func_start:func_start+500])
+        sys.exit(1)
+
+# Insert our case BEFORE the default case
+new_case = (
+    '\t/* ===== BC-250 v3 PATCH START ===== */\n'
+    '\tcase IP_VERSION(10, 1, 3):\n'
+    '\t\t/*\n'
+    '\t\t * BC-250 / Cyan Skillfish (gfx1013): GFXOFF causes the GPU to\n'
+    '\t\t * enter a power-saving state from which it cannot reliably wake.\n'
+    '\t\t * Unconditionally disable GFXOFF to prevent GPU hangs.\n'
+    '\t\t */\n'
+    '\t\tadev->pm.pp_feature &= ~PP_GFXOFF_MASK;\n'
+    '\t\tdev_info(adev->dev,\n'
+    '\t\t\t "BC-250: GFXOFF disabled to prevent GPU power-state hangs\\n");\n'
+    '\t\tbreak;\n'
+    '\t/* ===== BC-250 v3 PATCH END ===== */\n'
+)
+
+content = content[:default_pos] + new_case + content[default_pos:]
+
+with open(filepath, 'w') as f:
+    f.write(content)
+
+print("Patch 1 applied: gfx_v10_0.c — GFXOFF disable for Cyan Skillfish (IP 10.1.3)")