[PATCH v4 15/17] ras: AEST: Add framework to process AEST vendor node

[Ruidong Tian <tianruidong@linux.alibaba.com>]

AEST table include vendor error node to support the component that do
not implement standard Arm RAS architecture[1]. Each vendor node may
have their own initialize and interrupt handle function. This patch
supply a framework to process vendor error nodes, the vendor process
function is binded with vendor HID.

[1]: https://developer.arm.com/documentation/ddi0587/latest/

Signed-off-by: Ruidong Tian <tianruidong@linux.alibaba.com>
---
 drivers/ras/aest/aest-core.c | 28 +++++++++++++++++++++++++++-
 drivers/ras/aest/aest.h      |  5 +++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/ras/aest/aest-core.c b/drivers/ras/aest/aest-core.c
index 052211ca3e2a..4d20e54832fd 100644
--- a/drivers/ras/aest/aest-core.c
+++ b/drivers/ras/aest/aest-core.c
@@ -925,6 +925,29 @@ static int aest_setup_irq(struct platform_device *pdev,
 	return 0;
 }
 
+static struct aest_vendor_match vendor_match[] = {
+	{  },
+};
+
+static int
+aest_vendor_probe(struct aest_device *adev, struct aest_hnode *ahnode)
+{
+	int i;
+	struct acpi_aest_node *anode;
+
+	anode = list_first_entry(&ahnode->list, struct acpi_aest_node, list);
+	if (!anode)
+		return -ENODEV;
+
+	aest_dev_dbg(adev, "Try to probe vendor node %s\n", anode->vendor->acpi_hid);
+	for (i = 0; i < ARRAY_SIZE(vendor_match); i++) {
+		if (!strncmp(vendor_match[i].hid, anode->vendor->acpi_hid, 8))
+			return vendor_match[i].probe(adev, ahnode);
+	}
+
+	return -ENODEV;
+}
+
 static int aest_device_probe(struct platform_device *pdev)
 {
 	int ret;
@@ -950,7 +973,10 @@ static int aest_device_probe(struct platform_device *pdev)
 	}
 	init_llist_head(&adev->event_list);
 
-	ret = aest_init_nodes(adev, ahnode);
+	if (ahnode->type == ACPI_AEST_VENDOR_ERROR_NODE)
+		ret = aest_vendor_probe(adev, ahnode);
+	else
+		ret = aest_init_nodes(adev, ahnode);
 	if (ret)
 		return ret;
 
diff --git a/drivers/ras/aest/aest.h b/drivers/ras/aest/aest.h
index 2f6a7b9ca4ef..304c03839d31 100644
--- a/drivers/ras/aest/aest.h
+++ b/drivers/ras/aest/aest.h
@@ -244,6 +244,11 @@ static const char *const aest_node_name[] = {
 	[ACPI_AEST_PROXY_ERROR_NODE] = "proxy",
 };
 
+struct aest_vendor_match {
+	char hid[ACPI_ID_LEN];
+	int (*probe)(struct aest_device *adev, struct aest_hnode *anode);
+};
+
 static inline int aest_set_name(struct aest_device *adev,
 				struct aest_hnode *ahnode)
 {
-- 
2.51.2.612.gdc70283dfc