svn commit: r333682 - head/sys/dev/cxgbe

[Navdeep Parhar]

Author: np
Date: Wed May 16 17:55:16 2018
New Revision: 333682
URL: https://svnweb.freebsd.org/changeset/base/333682

Log:
  cxgbe(4): Fall back to a failsafe configuration built into the firmware
  if an error is reported while pre-processing the configuration file that
  the driver attempted to use.
  
  Also, allow the user to explicitly use the built-in configuration with
  hw.cxgbe.config_file="built-in"
  
  MFC after:	2 days
  Sponsored by:	Chelsio Communications

Modified:
  head/sys/dev/cxgbe/t4_main.c

Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c	Wed May 16 17:54:40 2018	(r333681)
+++ head/sys/dev/cxgbe/t4_main.c	Wed May 16 17:55:16 2018	(r333682)
@@ -379,9 +379,10 @@ int t4_intr_types = INTR_MSIX | INTR_MSI | INTR_INTX;
 TUNABLE_INT("hw.cxgbe.interrupt_types", &t4_intr_types);
 
 /*
- * Configuration file.
+ * Configuration file.  All the _CF names here are special.
  */
 #define DEFAULT_CF	"default"
+#define BUILTIN_CF	"built-in"
 #define FLASH_CF	"flash"
 #define UWIRE_CF	"uwire"
 #define FPGA_CF		"fpga"
@@ -3342,7 +3343,8 @@ partition_resources(struct adapter *sc, const struct f
 			snprintf(sc->cfg_file, sizeof(sc->cfg_file), UWIRE_CF);
 		if (is_fpga(sc))
 			snprintf(sc->cfg_file, sizeof(sc->cfg_file), FPGA_CF);
-	}
+	} else if (strncmp(t4_cfg_file, BUILTIN_CF, sizeof(t4_cfg_file)) == 0)
+		goto use_built_in_config;	/* go straight to config. */
 
 	/*
 	 * We need to load another module if the profile is anything except
@@ -3453,8 +3455,31 @@ use_config_on_flash:
 	if (rc != 0) {
 		device_printf(sc->dev,
 		    "failed to pre-process config file: %d "
-		    "(mtype %d, moff 0x%x).\n", rc, mtype, moff);
-		goto done;
+		    "(mtype %d, moff 0x%x).  Will reset the firmware and retry "
+		    "with the built-in configuration.\n", rc, mtype, moff);
+
+	    	rc = -t4_fw_reset(sc, sc->mbox, F_PIORSTMODE | F_PIORST);
+		if (rc != 0) {
+			device_printf(sc->dev,
+			    "firmware reset failed: %d.\n", rc);
+			if (rc != ETIMEDOUT && rc != EIO) {
+				t4_fw_bye(sc, sc->mbox);
+				sc->flags &= ~FW_OK;
+			}
+			goto done;
+		}
+		snprintf(sc->cfg_file, sizeof(sc->cfg_file), "%s", "built-in");
+use_built_in_config:
+		bzero(&caps, sizeof(caps));
+		caps.op_to_write = htobe32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
+		    F_FW_CMD_REQUEST | F_FW_CMD_READ);
+		caps.cfvalid_to_len16 = htobe32(FW_LEN16(caps));
+		rc = t4_wr_mbox(sc, sc->mbox, &caps, sizeof(caps), &caps);
+		if (rc != 0) {
+			device_printf(sc->dev,
+			    "built-in configuration failed: %d.\n", rc);
+			goto done;
+		}
 	}
 
 	finicsum = be32toh(caps.finicsum);