From: Edwin Peer <edwin.peer@broadcom.com>
Date: Sun, 4 Oct 2020 19:22:53 +0000 (-0400)
Subject: bnxt_en: log firmware status on firmware init failure
X-Git-Tag: v5.15~2655^2~58^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ba02629ff6cbadce2c6452a4942ccacef658e5c0;p=platform%2Fkernel%2Flinux-starfive.git

bnxt_en: log firmware status on firmware init failure

Firmware now supports device independent discovery of the status
register location. This status register can provide more detailed
information about firmware errors, especially if problems occur
before the HWRM interface is functioning. Attempt to map this
register if it is present and report the firmware status on firmware
init failures.

Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index cf730ec..224f76e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -7366,6 +7366,47 @@ static int bnxt_alloc_fw_health(struct bnxt *bp)
 	return 0;
 }
 
+static void __bnxt_map_fw_health_reg(struct bnxt *bp, u32 reg)
+{
+	writel(reg & BNXT_GRC_BASE_MASK, bp->bar0 +
+					 BNXT_GRCPF_REG_WINDOW_BASE_OUT +
+					 BNXT_FW_HEALTH_WIN_MAP_OFF);
+}
+
+static void bnxt_try_map_fw_health_reg(struct bnxt *bp)
+{
+	void __iomem *hs;
+	u32 status_loc;
+	u32 reg_type;
+	u32 sig;
+
+	__bnxt_map_fw_health_reg(bp, HCOMM_STATUS_STRUCT_LOC);
+	hs = bp->bar0 + BNXT_FW_HEALTH_WIN_OFF(HCOMM_STATUS_STRUCT_LOC);
+
+	sig = readl(hs + offsetof(struct hcomm_status, sig_ver));
+	if ((sig & HCOMM_STATUS_SIGNATURE_MASK) != HCOMM_STATUS_SIGNATURE_VAL) {
+		if (bp->fw_health)
+			bp->fw_health->status_reliable = false;
+		return;
+	}
+
+	if (__bnxt_alloc_fw_health(bp)) {
+		netdev_warn(bp->dev, "no memory for firmware status checks\n");
+		return;
+	}
+
+	status_loc = readl(hs + offsetof(struct hcomm_status, fw_status_loc));
+	bp->fw_health->regs[BNXT_FW_HEALTH_REG] = status_loc;
+	reg_type = BNXT_FW_HEALTH_REG_TYPE(status_loc);
+	if (reg_type == BNXT_FW_HEALTH_REG_TYPE_GRC) {
+		__bnxt_map_fw_health_reg(bp, status_loc);
+		bp->fw_health->mapped_regs[BNXT_FW_HEALTH_REG] =
+			BNXT_FW_HEALTH_WIN_OFF(status_loc);
+	}
+
+	bp->fw_health->status_reliable = true;
+}
+
 static int bnxt_map_fw_health_regs(struct bnxt *bp)
 {
 	struct bnxt_fw_health *fw_health = bp->fw_health;
@@ -7382,14 +7423,12 @@ static int bnxt_map_fw_health_regs(struct bnxt *bp)
 			reg_base = reg & BNXT_GRC_BASE_MASK;
 		if ((reg & BNXT_GRC_BASE_MASK) != reg_base)
 			return -ERANGE;
-		fw_health->mapped_regs[i] = BNXT_FW_HEALTH_WIN_BASE +
-					    (reg & BNXT_GRC_OFFSET_MASK);
+		fw_health->mapped_regs[i] = BNXT_FW_HEALTH_WIN_OFF(reg);
 	}
 	if (reg_base == 0xffffffff)
 		return 0;
 
-	writel(reg_base, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT +
-			 BNXT_FW_HEALTH_WIN_MAP_OFF);
+	__bnxt_map_fw_health_reg(bp, reg_base);
 	return 0;
 }
 
@@ -11002,8 +11041,15 @@ static int bnxt_fw_init_one_p1(struct bnxt *bp)
 
 	bp->fw_cap = 0;
 	rc = bnxt_hwrm_ver_get(bp);
-	if (rc)
+	bnxt_try_map_fw_health_reg(bp);
+	if (rc) {
+		if (bp->fw_health && bp->fw_health->status_reliable)
+			netdev_err(bp->dev,
+				   "Firmware not responding, status: 0x%x\n",
+				   bnxt_fw_health_readl(bp,
+							BNXT_FW_HEALTH_REG));
 		return rc;
+	}
 
 	if (bp->fw_cap & BNXT_FW_CAP_KONG_MB_CHNL) {
 		rc = bnxt_alloc_kong_hwrm_resources(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 7438725..e940a24 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1494,6 +1494,7 @@ struct bnxt_fw_health {
 	u8 enabled:1;
 	u8 master:1;
 	u8 fatal:1;
+	u8 status_reliable:1;
 	u8 tmr_multiplier;
 	u8 tmr_counter;
 	u8 fw_reset_seq_cnt;
@@ -1521,6 +1522,9 @@ struct bnxt_fw_reporter_ctx {
 #define BNXT_FW_HEALTH_WIN_BASE		0x3000
 #define BNXT_FW_HEALTH_WIN_MAP_OFF	8
 
+#define BNXT_FW_HEALTH_WIN_OFF(reg)	(BNXT_FW_HEALTH_WIN_BASE +	\
+					 ((reg) & BNXT_GRC_OFFSET_MASK))
+
 #define BNXT_FW_STATUS_HEALTHY		0x8000
 #define BNXT_FW_STATUS_SHUTDOWN		0x100000