netdev - [PATCH v3 net-next 4/5] bnxt_en: Read partno and serialno of the board from VPD

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Message-Id: <1585224205-11966-1-git-send-email-vasundhara-v.volam@broadcom.com>
Date:   Thu, 26 Mar 2020 17:33:24 +0530
From:   Vasundhara Volam <vasundhara-v.volam@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org,
        Vasundhara Volam <vasundhara-v.volam@...adcom.com>,
        Michael Chan <michael.chan@...adcom.com>
Subject: [PATCH v3 net-next 4/5] bnxt_en: Read partno and serialno of the board from VPD

Store the part number and serial number information from VPD in
the bnxt structure. Follow up patch will add the support to display
the information via devlink command.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 59 +++++++++++++++++++++++++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  4 +++
 2 files changed, 63 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 7bcd313..7298cee 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -11740,6 +11740,63 @@ static int bnxt_init_mac_addr(struct bnxt *bp)
 	return rc;
 }
 
+#define BNXT_VPD_LEN	512
+static void bnxt_vpd_read_info(struct bnxt *bp)
+{
+	struct pci_dev *pdev = bp->pdev;
+	int i, len, pos, ro_size;
+	ssize_t vpd_size;
+	u8 *vpd_data;
+
+	vpd_data = kmalloc(BNXT_VPD_LEN, GFP_KERNEL);
+	if (!vpd_data)
+		return;
+
+	vpd_size = pci_read_vpd(pdev, 0, BNXT_VPD_LEN, vpd_data);
+	if (vpd_size <= 0) {
+		netdev_err(bp->dev, "Unable to read VPD\n");
+		goto exit;
+	}
+
+	i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
+	if (i < 0) {
+		netdev_err(bp->dev, "VPD READ-Only not found\n");
+		goto exit;
+	}
+
+	ro_size = pci_vpd_lrdt_size(&vpd_data[i]);
+	i += PCI_VPD_LRDT_TAG_SIZE;
+	if (i + ro_size > vpd_size)
+		goto exit;
+
+	pos = pci_vpd_find_info_keyword(vpd_data, i, ro_size,
+					PCI_VPD_RO_KEYWORD_PARTNO);
+	if (pos < 0)
+		goto read_sn;
+
+	len = pci_vpd_info_field_size(&vpd_data[pos]);
+	pos += PCI_VPD_INFO_FLD_HDR_SIZE;
+	if (len + pos > vpd_size)
+		goto read_sn;
+
+	strlcpy(bp->board_partno, &vpd_data[pos], min(len, BNXT_VPD_FLD_LEN));
+
+read_sn:
+	pos = pci_vpd_find_info_keyword(vpd_data, i, ro_size,
+					PCI_VPD_RO_KEYWORD_SERIALNO);
+	if (pos < 0)
+		goto exit;
+
+	len = pci_vpd_info_field_size(&vpd_data[pos]);
+	pos += PCI_VPD_INFO_FLD_HDR_SIZE;
+	if (len + pos > vpd_size)
+		goto exit;
+
+	strlcpy(bp->board_serialno, &vpd_data[pos], min(len, BNXT_VPD_FLD_LEN));
+exit:
+	kfree(vpd_data);
+}
+
 static int bnxt_pcie_dsn_get(struct bnxt *bp, u8 dsn[])
 {
 	struct pci_dev *pdev = bp->pdev;
@@ -11797,6 +11854,8 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	dev->ethtool_ops = &bnxt_ethtool_ops;
 	pci_set_drvdata(pdev, dev);
 
+	bnxt_vpd_read_info(bp);
+
 	rc = bnxt_alloc_hwrm_resources(bp);
 	if (rc)
 		goto init_err_pci_clean;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index cc57538..0690009 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1500,6 +1500,10 @@ struct bnxt {
 	 (chip_num) == CHIP_NUM_58804 ||        \
 	 (chip_num) == CHIP_NUM_58808)
 
+#define BNXT_VPD_FLD_LEN	32
+	char			board_partno[BNXT_VPD_FLD_LEN];
+	char			board_serialno[BNXT_VPD_FLD_LEN];
+
 	struct net_device	*dev;
 	struct pci_dev		*pdev;
 
-- 
1.8.3.1