net/bnxt: support hot firmware upgrade for Stingray

[dpdk.git] / drivers / net / bnxt / bnxt_cpr.c

diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 3893179..00ca6bb 100644 (file)
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -5,6 +5,7 @@
 
 #include <rte_malloc.h>
 #include <rte_alarm.h>
+#include <rte_cycles.h>
 
 #include "bnxt.h"
 #include "bnxt_cpr.h"
@@ -12,6 +13,40 @@
 #include "bnxt_ring.h"
 #include "hsi_struct_def_dpdk.h"
 
+void bnxt_wait_for_device_shutdown(struct bnxt *bp)
+{
+       uint32_t val, timeout;
+
+       /* if HWRM_FUNC_QCAPS_OUTPUT_FLAGS_ERR_RECOVER_RELOAD is set
+        * in HWRM_FUNC_QCAPS command, wait for FW_STATUS to set
+        * the SHUTDOWN bit in health register
+        */
+       if (!(bp->recovery_info &&
+             (bp->flags & BNXT_FLAG_FW_CAP_ERR_RECOVER_RELOAD)))
+               return;
+
+       /* Driver has to wait for fw_reset_max_msecs or shutdown bit which comes
+        * first for FW to collect crash dump.
+        */
+       timeout = bp->fw_reset_max_msecs;
+
+       /* Driver has to poll for shutdown bit in fw_status register
+        *
+        * 1. in case of hot fw upgrade, this bit will be set after all
+        *    function drivers unregistered with fw.
+        * 2. in case of fw initiated error recovery, this bit will be
+        *    set after fw has collected the core dump
+        */
+       do {
+               val = bnxt_read_fw_status_reg(bp, BNXT_FW_STATUS_REG);
+               if (val & BNXT_FW_STATUS_SHUTDOWN)
+                       return;
+
+               rte_delay_ms(100);
+               timeout -= 100;
+       } while (timeout);
+}
+
 /*
  * Async event handling
  */