[Skiboot] [PATCH v3 2/2] prd: Enable error logging via firmware_request interface

[Vasant Hegde]

In P9 HBRT sends error logs to FSP via firmware_request interface.
This patch adds support to parse error log and send it to FSP.

CC: Jeremy Kerr <jk at ozlabs.org>
CC: Daniel M Crowell <dcrowell at us.ibm.com>
Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
Acked-by: Jeremy Kerr <jk at ozlabs.org>
---
Changes in v3:
 - As Jeremy suggested I've moved structure/macro defination to separate patch.

@Jeremy,
  I've retained your "Acked-by" from v2 as there is no functional changes. Hope
  you are fine with that.

-Vasant

 core/hostservices.c    |  2 +-
 hw/prd.c               | 13 +++++++++++++
 include/hostservices.h |  1 +
 include/prd-fw-msg.h   |  5 +++++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/core/hostservices.c b/core/hostservices.c
index d1f6fda..dd8cae2 100644
--- a/core/hostservices.c
+++ b/core/hostservices.c
@@ -329,7 +329,7 @@ static void hservice_start_elog_send(void)
 	goto again;
 }
 
-static int hservice_send_error_log(uint32_t plid, uint32_t dsize, void *data)
+int hservice_send_error_log(uint32_t plid, uint32_t dsize, void *data)
 {
 	struct hbrt_elog_ent *ent;
 	void *abuf;
diff --git a/hw/prd.c b/hw/prd.c
index d076c19..4db92eb 100644
--- a/hw/prd.c
+++ b/hw/prd.c
@@ -23,6 +23,7 @@
 #include <fsp.h>
 #include <mem_region.h>
 #include <prd-fw-msg.h>
+#include <hostservices.h>
 
 enum events {
 	EVENT_ATTN	= 1 << 0,
@@ -375,6 +376,18 @@ static int prd_msg_handle_firmware_req(struct opal_prd_msg *msg)
 		prd_msg->hdr.size = cpu_to_be16(sizeof(*prd_msg));
 		rc = 0;
 		break;
+	case PRD_FW_MSG_TYPE_ERROR_LOG:
+		rc = hservice_send_error_log(fw_req->errorlog.plid,
+					     fw_req->errorlog.size,
+					     fw_req->errorlog.data);
+		/* Return generic response to HBRT */
+		fw_resp->type = cpu_to_be64(PRD_FW_MSG_TYPE_RESP_GENERIC);
+		fw_resp->generic_resp.status = cpu_to_be64(rc);
+		prd_msg->fw_resp.len = cpu_to_be64(PRD_FW_MSG_BASE_SIZE +
+						 sizeof(fw_resp->generic_resp));
+		prd_msg->hdr.size = cpu_to_be16(sizeof(*prd_msg));
+		rc = 0;
+		break;
 	default:
 		rc = -ENOSYS;
 	}
diff --git a/include/hostservices.h b/include/hostservices.h
index d6bb3e3..62ef04b 100644
--- a/include/hostservices.h
+++ b/include/hostservices.h
@@ -38,5 +38,6 @@ void host_services_occ_base_setup(void);
 
 int find_master_and_slave_occ(uint64_t **master, uint64_t **slave,
 			      int *nr_masters, int *nr_slaves);
+int hservice_send_error_log(uint32_t plid, uint32_t dsize, void *data);
 
 #endif /* __HOSTSERVICES_H */
diff --git a/include/prd-fw-msg.h b/include/prd-fw-msg.h
index d68482c..333e594 100644
--- a/include/prd-fw-msg.h
+++ b/include/prd-fw-msg.h
@@ -39,6 +39,11 @@ struct prd_fw_msg {
 		struct {
 			__be64	status;
 		} generic_resp;
+		struct {
+			__be32	plid;
+			__be32	size;
+			char	data[];
+		} __packed errorlog;
 	};
 };
 
-- 
2.9.3