Change in coreboot[master]: nb/amd/amdfam10/bootblock.c: Refactor HT link error

[Michał Żygowski (Code Review)]

Michał Żygowski has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/62100 )

Change subject: nb/amd/amdfam10/bootblock.c: Refactor HT link error
......................................................................

nb/amd/amdfam10/bootblock.c: Refactor HT link error

Signed-off-by: Michał Żygowski 
Change-Id: I37d46f42e13fb398529da3d963f57e21165d1b59
---
M src/northbridge/amd/amdfam10/bootblock.c
1 file changed, 24 insertions(+), 17 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/00/62100/1

diff --git a/src/northbridge/amd/amdfam10/bootblock.c b/src/northbridge/amd/amdfam10/bootblock.c
index 0fe2464..547eff6 100644
--- a/src/northbridge/amd/amdfam10/bootblock.c
+++ b/src/northbridge/amd/amdfam10/bootblock.c
@@ -67,6 +67,28 @@
    	return false;
 }

+static bool check_ht_link_error(pci_devfn_t dev, u8 offset)
+{
+	u16 ctrl = pci_read_config16(dev, offset);
+
+	if (ctrl & (HT_LINK_CTRL_LINK_FAIL | HT_LINK_CTRL_CRC_UNRECOV_ERR)) {
+		/*
+		 * Either the link has failed, or we have a CRC error.
+		 * Sometimes this can happen due to link retrain, so lets knock
+		 * it down and see if its transient
+		 */
+		ctrl |= (HT_LINK_CTRL_LINK_FAIL | HT_LINK_CTRL_CRC_UNRECOV_ERR);
+		pci_write_config16(dev, offset, ctrl);
+		ctrl = pci_read_config16(dev, offset);
+		if (ctrl & (HT_LINK_CTRL_LINK_FAIL | HT_LINK_CTRL_CRC_UNRECOV_ERR)) {
+			/* Can not clear the error */
+			return true;
+		}
+	}
+
+	return false;
+}
+
 static void enumerate_ht_chain(void)
 {

@@ -167,23 +189,8 @@
    					return;
    				}

-					if (ctrl & (HT_LINK_CTRL_LINK_FAIL | HT_LINK_CTRL_CRC_UNRECOV_ERR)) {
-						/*
-						 * Either the link has failed,
-						 * or we have a CRC error.
-						 * Sometimes this can happen
-						 * due to link retrain, so lets
-						 * knock it down and see if its
-						 * transient
-						 */
-						ctrl |= (HT_LINK_CTRL_LINK_FAIL | HT_LINK_CTRL_CRC_UNRECOV_ERR);
-						pci_write_config16(devx, pos + ctrl_off, ctrl);
-						ctrl = pci_read_config16(devx, pos + ctrl_off);
-						if (ctrl & (HT_LINK_CTRL_LINK_FAIL | HT_LINK_CTRL_CRC_UNRECOV_ERR)) {
-							/* Can not clear the error */
-							break;
-						}
-					}
+					if (check_ht_link_error(devx, pos + ctrl_off))
+						break;
    			} while (!(ctrl & HT_LINK_CTRL_INIT_COMPLETE));

break;