qede: Add support for reading the config id attributes.

Add driver support for dumping the config id attributes via ethtool dump
interfaces.
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qede/qede.h

@@ -177,6 +177,19 @@ enum qede_flags_bit {
 	QEDE_FLAGS_TX_TIMESTAMPING_EN
 };
 
+#define QEDE_DUMP_MAX_ARGS 4
+enum qede_dump_cmd {
+	QEDE_DUMP_CMD_NONE = 0,
+	QEDE_DUMP_CMD_NVM_CFG,
+	QEDE_DUMP_CMD_MAX
+};
+
+struct qede_dump_info {
+	enum qede_dump_cmd cmd;
+	u8 num_args;
+	u32 args[QEDE_DUMP_MAX_ARGS];
+};
+
 struct qede_dev {
 	struct qed_dev			*cdev;
 	struct net_device		*ndev;
@@ -262,6 +275,7 @@ struct qede_dev {
 	struct qede_rdma_dev		rdma_info;
 
 	struct bpf_prog *xdp_prog;
+	struct qede_dump_info		dump_info;
 };
 
 enum QEDE_STATE {

drivers/net/ethernet/qlogic/qede/qede_ethtool.c

@@ -48,6 +48,9 @@
 	 {QEDE_RQSTAT_OFFSET(stat_name), QEDE_RQSTAT_STRING(stat_name)}
 
 #define QEDE_SELFTEST_POLL_COUNT 100
+#define QEDE_DUMP_VERSION	0x1
+#define QEDE_DUMP_NVM_BUF_LEN	32
+#define QEDE_DUMP_NVM_ARG_COUNT	2
 
 static const struct {
 	u64 offset;
@@ -1973,6 +1976,89 @@ static int qede_get_module_eeprom(struct net_device *dev,
 	return rc;
 }
 
+static int qede_set_dump(struct net_device *dev, struct ethtool_dump *val)
+{
+	struct qede_dev *edev = netdev_priv(dev);
+	int rc = 0;
+
+	if (edev->dump_info.cmd == QEDE_DUMP_CMD_NONE) {
+		if (val->flag > QEDE_DUMP_CMD_MAX) {
+			DP_ERR(edev, "Invalid command %d\n", val->flag);
+			return -EINVAL;
+		}
+		edev->dump_info.cmd = val->flag;
+		edev->dump_info.num_args = 0;
+		return 0;
+	}
+
+	if (edev->dump_info.num_args == QEDE_DUMP_MAX_ARGS) {
+		DP_ERR(edev, "Arg count = %d\n", edev->dump_info.num_args);
+		return -EINVAL;
+	}
+
+	switch (edev->dump_info.cmd) {
+	case QEDE_DUMP_CMD_NVM_CFG:
+		edev->dump_info.args[edev->dump_info.num_args] = val->flag;
+		edev->dump_info.num_args++;
+		break;
+	default:
+		break;
+	}
+
+	return rc;
+}
+
+static int qede_get_dump_flag(struct net_device *dev,
+			      struct ethtool_dump *dump)
+{
+	struct qede_dev *edev = netdev_priv(dev);
+
+	dump->version = QEDE_DUMP_VERSION;
+	switch (edev->dump_info.cmd) {
+	case QEDE_DUMP_CMD_NVM_CFG:
+		dump->flag = QEDE_DUMP_CMD_NVM_CFG;
+		dump->len = QEDE_DUMP_NVM_BUF_LEN;
+		break;
+	default:
+		break;
+	}
+
+	DP_VERBOSE(edev, QED_MSG_DEBUG,
+		   "dump->version = 0x%x dump->flag = %d dump->len = %d\n",
+		   dump->version, dump->flag, dump->len);
+	return 0;
+}
+
+static int qede_get_dump_data(struct net_device *dev,
+			      struct ethtool_dump *dump, void *buf)
+{
+	struct qede_dev *edev = netdev_priv(dev);
+	int rc;
+
+	switch (edev->dump_info.cmd) {
+	case QEDE_DUMP_CMD_NVM_CFG:
+		if (edev->dump_info.num_args != QEDE_DUMP_NVM_ARG_COUNT) {
+			DP_ERR(edev, "Arg count = %d required = %d\n",
+			       edev->dump_info.num_args,
+			       QEDE_DUMP_NVM_ARG_COUNT);
+			return -EINVAL;
+		}
+		rc =  edev->ops->common->read_nvm_cfg(edev->cdev, (u8 **)&buf,
+						      edev->dump_info.args[0],
+						      edev->dump_info.args[1]);
+		break;
+	default:
+		DP_ERR(edev, "Invalid cmd = %d\n", edev->dump_info.cmd);
+		rc = -EINVAL;
+		break;
+	}
+
+	edev->dump_info.cmd = QEDE_DUMP_CMD_NONE;
+	edev->dump_info.num_args = 0;
+
+	return rc;
+}
+
 static const struct ethtool_ops qede_ethtool_ops = {
 	.get_link_ksettings = qede_get_link_ksettings,
 	.set_link_ksettings = qede_set_link_ksettings,
@@ -2014,6 +2100,9 @@ static const struct ethtool_ops qede_ethtool_ops = {
 	.get_tunable = qede_get_tunable,
 	.set_tunable = qede_set_tunable,
 	.flash_device = qede_flash_device,
+	.get_dump_flag = qede_get_dump_flag,
+	.get_dump_data = qede_get_dump_data,
+	.set_dump = qede_set_dump,
 };
 
 static const struct ethtool_ops qede_vf_ethtool_ops = {