[PATCH 2/2] drm/xe/nvm: define survivabilty partition

[Alexander Usyskin]

Define 8M survivability partition for CRI when
storage is open for write.

Signed-off-by: Alexander Usyskin <alexander.usyskin@xxxxxxxxx>
---
 drivers/gpu/drm/xe/xe_nvm.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_nvm.c b/drivers/gpu/drm/xe/xe_nvm.c
index 1ea67eaeae24..54de0dbe1fa4 100644
--- a/drivers/gpu/drm/xe/xe_nvm.c
+++ b/drivers/gpu/drm/xe/xe_nvm.c
@@ -55,10 +55,11 @@ static bool xe_nvm_non_posted_erase(struct xe_device *xe)
 	}
 }
 
-static bool xe_nvm_writable_override(struct xe_device *xe)
+static bool xe_nvm_writable_override(struct xe_device *xe, size_t *survivability_size)
 {
 	struct xe_mmio *mmio = xe_root_tile_mmio(xe);
 	bool writable_override;
+	size_t s_size = 0;
 	struct xe_reg reg;
 	u32 test_bit, test_val;
 
@@ -67,6 +68,7 @@ static bool xe_nvm_writable_override(struct xe_device *xe)
 		reg = PCODE_SCRATCH(0);
 		test_bit = FDO_MODE;
 		test_val = FDO_MODE;
+		s_size = SZ_8M;
 		break;
 	case XE_BATTLEMAGE:
 		reg = HECI_FWSTS2(DG2_GSC_HECI2_BASE);
@@ -90,12 +92,17 @@ static bool xe_nvm_writable_override(struct xe_device *xe)
 		break;
 	default:
 		drm_err(&xe->drm, "Unknown platform\n");
+		*survivability_size = 0;
 		return true;
 	}
 
 	writable_override = (xe_mmio_read32(mmio, reg) & test_bit) == test_val;
-	if (writable_override)
+	if (writable_override) {
 		drm_info(&xe->drm, "NVM access overridden by jumper\n");
+		*survivability_size = s_size;
+	} else {
+		*survivability_size = 0;
+	}
 	return writable_override;
 }
 
@@ -142,7 +149,7 @@ int xe_nvm_init(struct xe_device *xe)
 	if (!nvm)
 		return -ENOMEM;
 
-	nvm->writable_override = xe_nvm_writable_override(xe);
+	nvm->writable_override = xe_nvm_writable_override(xe, &nvm->survivability_size);
 	nvm->non_posted_erase = xe_nvm_non_posted_erase(xe);
 	nvm->bar.parent = &pdev->resource[0];
 	nvm->bar.start = GEN12_GUNIT_NVM_BASE + pdev->resource[0].start;

-- 
2.53.0