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Message-ID: <20240524135255.3607422-4-anil.samal@intel.com>
Date: Fri, 24 May 2024 06:51:07 -0700
From: Anil Samal <anil.samal@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
leszek.pepiak@...el.com,
przemyslaw.kitszel@...el.com,
lukasz.czapnik@...el.com,
anthony.l.nguyen@...el.com,
jacob.e.keller@...el.com,
Anil Samal <anil.samal@...el.com>,
Simon Horman <horms@...nel.org>,
Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: [PATCH iwl-next v3 3/3] ice: Implement driver functionality to dump serdes equalizer values
To debug link issues in the field, serdes Tx/Rx equalizer values
help to determine the health of serdes lane.
Extend 'ethtool -d' option to dump serdes Tx/Rx equalizer.
The following list of equalizer param is supported
a. rx_equalization_pre2
b. rx_equalization_pre1
c. rx_equalization_post1
d. rx_equalization_bflf
e. rx_equalization_bfhf
f. rx_equalization_drate
g. tx_equalization_pre1
h. tx_equalization_pre3
i. tx_equalization_atten
j. tx_equalization_post1
k. tx_equalization_pre2
Reviewed-by: Simon Horman <horms@...nel.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
Signed-off-by: Anil Samal <anil.samal@...el.com>
---
.../net/ethernet/intel/ice/ice_adminq_cmd.h | 51 +++++++
drivers/net/ethernet/intel/ice/ice_common.c | 37 +++++
drivers/net/ethernet/intel/ice/ice_common.h | 2 +
drivers/net/ethernet/intel/ice/ice_ethtool.c | 141 +++++++++++++++++-
drivers/net/ethernet/intel/ice/ice_ethtool.h | 19 +++
5 files changed, 248 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
index e76c388b9905..92d96c85d924 100644
--- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
@@ -1460,6 +1460,55 @@ struct ice_aqc_get_sensor_reading_resp {
} data;
};
+/* DNL call command (indirect 0x0682)
+ * Struct is used for both command and response
+ */
+struct ice_aqc_dnl_call_command {
+ u8 ctx; /* Used in command, reserved in response */
+ u8 reserved;
+ __le16 activity_id;
+#define ICE_AQC_ACT_ID_DNL 0x1129
+ __le32 reserved1;
+ __le32 addr_high;
+ __le32 addr_low;
+};
+
+struct ice_aqc_dnl_equa_param {
+ __le16 data_in;
+#define ICE_AQC_RX_EQU_SHIFT 8
+#define ICE_AQC_RX_EQU_PRE2 (0x10 << ICE_AQC_RX_EQU_SHIFT)
+#define ICE_AQC_RX_EQU_PRE1 (0x11 << ICE_AQC_RX_EQU_SHIFT)
+#define ICE_AQC_RX_EQU_POST1 (0x12 << ICE_AQC_RX_EQU_SHIFT)
+#define ICE_AQC_RX_EQU_BFLF (0x13 << ICE_AQC_RX_EQU_SHIFT)
+#define ICE_AQC_RX_EQU_BFHF (0x14 << ICE_AQC_RX_EQU_SHIFT)
+#define ICE_AQC_RX_EQU_DRATE (0x15 << ICE_AQC_RX_EQU_SHIFT)
+#define ICE_AQC_TX_EQU_PRE1 0x0
+#define ICE_AQC_TX_EQU_PRE3 0x3
+#define ICE_AQC_TX_EQU_ATTEN 0x4
+#define ICE_AQC_TX_EQU_POST1 0x8
+#define ICE_AQC_TX_EQU_PRE2 0xC
+ __le16 op_code_serdes_sel;
+#define ICE_AQC_OP_CODE_SHIFT 4
+#define ICE_AQC_OP_CODE_RX_EQU (0x9 << ICE_AQC_OP_CODE_SHIFT)
+#define ICE_AQC_OP_CODE_TX_EQU (0x10 << ICE_AQC_OP_CODE_SHIFT)
+ __le32 reserved[3];
+};
+
+struct ice_aqc_dnl_equa_respon {
+ /* Equalization value can be negative */
+ int val;
+ __le32 reserved[3];
+};
+
+/* DNL call command/response buffer (indirect 0x0682) */
+struct ice_aqc_dnl_call {
+ union {
+ struct ice_aqc_dnl_equa_param txrx_equa_reqs;
+ __le32 stores[4];
+ struct ice_aqc_dnl_equa_respon txrx_equa_resp;
+ } sto;
+};
+
struct ice_aqc_link_topo_params {
u8 lport_num;
u8 lport_num_valid;
@@ -2563,6 +2612,7 @@ struct ice_aq_desc {
struct ice_aqc_get_link_status get_link_status;
struct ice_aqc_event_lan_overflow lan_overflow;
struct ice_aqc_get_link_topo get_link_topo;
+ struct ice_aqc_dnl_call_command dnl_call;
struct ice_aqc_i2c read_write_i2c;
struct ice_aqc_read_i2c_resp read_i2c_resp;
struct ice_aqc_get_set_tx_topo get_set_tx_topo;
@@ -2687,6 +2737,7 @@ enum ice_adminq_opc {
ice_aqc_opc_set_phy_rec_clk_out = 0x0630,
ice_aqc_opc_get_phy_rec_clk_out = 0x0631,
ice_aqc_opc_get_sensor_reading = 0x0632,
+ ice_aqc_opc_dnl_call = 0x0682,
ice_aqc_opc_get_link_topo = 0x06E0,
ice_aqc_opc_read_i2c = 0x06E2,
ice_aqc_opc_write_i2c = 0x06E3,
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 6430829ce98b..4f2e0832e237 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -3299,6 +3299,43 @@ int ice_update_link_info(struct ice_port_info *pi)
return status;
}
+/**
+ * ice_aq_get_phy_equalization - function to read serdes equaliser
+ * value from firmware using admin queue command.
+ * @hw: pointer to the HW struct
+ * @data_in: represents the serdes equalization parameter requested
+ * @op_code: represents the serdes number and flag to represent tx or rx
+ * @serdes_num: represents the serdes number
+ * @output: pointer to the caller-supplied buffer to return serdes equaliser
+ *
+ * Return: non-zero status on error and 0 on success.
+ */
+int ice_aq_get_phy_equalization(struct ice_hw *hw, u16 data_in, u16 op_code,
+ u8 serdes_num, int *output)
+{
+ struct ice_aqc_dnl_call_command *cmd;
+ struct ice_aqc_dnl_call buf = {};
+ struct ice_aq_desc desc;
+ int err;
+
+ buf.sto.txrx_equa_reqs.data_in = cpu_to_le16(data_in);
+ buf.sto.txrx_equa_reqs.op_code_serdes_sel =
+ cpu_to_le16(op_code | (serdes_num & 0xF));
+ cmd = &desc.params.dnl_call;
+ ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_dnl_call);
+ desc.flags |= cpu_to_le16(ICE_AQ_FLAG_BUF |
+ ICE_AQ_FLAG_RD |
+ ICE_AQ_FLAG_SI);
+ desc.datalen = cpu_to_le16(sizeof(struct ice_aqc_dnl_call));
+ cmd->activity_id = cpu_to_le16(ICE_AQC_ACT_ID_DNL);
+
+ err = ice_aq_send_cmd(hw, &desc, &buf, sizeof(struct ice_aqc_dnl_call),
+ NULL);
+ *output = err ? 0 : buf.sto.txrx_equa_resp.val;
+
+ return err;
+}
+
#define FEC_REG_PORT(port) { \
FEC_CORR_LOW_REG_PORT##port, \
FEC_CORR_HIGH_REG_PORT##port, \
diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h
index 6b888efce593..f4cff37e895a 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.h
+++ b/drivers/net/ethernet/intel/ice/ice_common.h
@@ -142,6 +142,8 @@ int
ice_get_link_default_override(struct ice_link_default_override_tlv *ldo,
struct ice_port_info *pi);
bool ice_is_phy_caps_an_enabled(struct ice_aqc_get_phy_caps_data *caps);
+int ice_aq_get_phy_equalization(struct ice_hw *hw, u16 data_in, u16 op_code,
+ u8 serdes_num, int *output);
int
ice_aq_get_fec_stats(struct ice_hw *hw, u16 pcs_quad, u16 pcs_port,
enum ice_fec_stats_types fec_type, u32 *output);
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 962a7666827d..8ba2b4e43049 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -463,7 +463,8 @@ ice_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
static int ice_get_regs_len(struct net_device __always_unused *netdev)
{
- return sizeof(ice_regs_dump_list);
+ return (sizeof(ice_regs_dump_list) +
+ sizeof(struct ice_regdump_to_ethtool));
}
/**
@@ -681,6 +682,140 @@ static int ice_get_port_topology(struct ice_hw *hw, u8 lport,
return 0;
}
+/**
+ * ice_get_tx_rx_equa - read serdes tx rx equaliser param
+ * @hw: pointer to the HW struct
+ * @serdes_num: represents the serdes number
+ * @ptr: structure to read all serdes parameter for given serdes
+ *
+ * Return: all serdes equalization parameter supported per serdes number
+ */
+static int ice_get_tx_rx_equa(struct ice_hw *hw, u8 serdes_num,
+ struct ice_serdes_equalization_to_ethtool *ptr)
+{
+ int err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_TX_EQU_PRE1,
+ ICE_AQC_OP_CODE_TX_EQU, serdes_num,
+ &ptr->tx_equalization_pre1);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_TX_EQU_PRE3,
+ ICE_AQC_OP_CODE_TX_EQU, serdes_num,
+ &ptr->tx_equalization_pre3);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_TX_EQU_ATTEN,
+ ICE_AQC_OP_CODE_TX_EQU, serdes_num,
+ &ptr->tx_equalization_atten);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_TX_EQU_POST1,
+ ICE_AQC_OP_CODE_TX_EQU, serdes_num,
+ &ptr->tx_equalization_post1);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_TX_EQU_PRE2,
+ ICE_AQC_OP_CODE_TX_EQU, serdes_num,
+ &ptr->tx_equalization_pre2);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_RX_EQU_PRE2,
+ ICE_AQC_OP_CODE_RX_EQU, serdes_num,
+ &ptr->rx_equalization_pre2);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_RX_EQU_PRE1,
+ ICE_AQC_OP_CODE_RX_EQU, serdes_num,
+ &ptr->rx_equalization_pre1);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_RX_EQU_POST1,
+ ICE_AQC_OP_CODE_RX_EQU, serdes_num,
+ &ptr->rx_equalization_post1);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_RX_EQU_BFLF,
+ ICE_AQC_OP_CODE_RX_EQU, serdes_num,
+ &ptr->rx_equalization_bflf);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_RX_EQU_BFHF,
+ ICE_AQC_OP_CODE_RX_EQU, serdes_num,
+ &ptr->rx_equalization_bfhf);
+ if (err)
+ return err;
+
+ err = ice_aq_get_phy_equalization(hw, ICE_AQC_RX_EQU_DRATE,
+ ICE_AQC_OP_CODE_RX_EQU, serdes_num,
+ &ptr->rx_equalization_drate);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/**
+ * ice_get_extended_regs - returns FEC correctable, uncorrectable stats per
+ * pcsquad, pcsport
+ * @netdev: pointer to net device structure
+ * @p: output buffer to fill requested register dump
+ *
+ * Return: 0 on success, negative on failure.
+ */
+static int ice_get_extended_regs(struct net_device *netdev, void *p)
+{
+ struct ice_netdev_priv *np = netdev_priv(netdev);
+ struct ice_regdump_to_ethtool *ice_prv_regs_buf;
+ struct ice_port_topology port_topology = {};
+ struct ice_port_info *pi;
+ struct ice_pf *pf;
+ struct ice_hw *hw;
+ unsigned int i;
+ int err;
+
+ pf = np->vsi->back;
+ hw = &pf->hw;
+ pi = np->vsi->port_info;
+
+ if (!hw || !pi)
+ return -EINVAL;
+
+ /* Serdes parameters are not supported if not the PF VSI */
+ if (np->vsi->type != ICE_VSI_PF)
+ return -EINVAL;
+
+ err = ice_get_port_topology(hw, pi->lport, &port_topology);
+ if (err)
+ return -EINVAL;
+ if (port_topology.serdes_lane_count > 4)
+ return -EINVAL;
+
+ ice_prv_regs_buf = p;
+
+ /* Get serdes equalization parameter for available serdes */
+ for (i = 0; i < port_topology.serdes_lane_count; i++) {
+ u8 serdes_num = 0;
+
+ serdes_num = port_topology.primary_serdes_lane + i;
+ err = ice_get_tx_rx_equa(hw, serdes_num,
+ &ice_prv_regs_buf->equalization[i]);
+ if (err)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static void
ice_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
{
@@ -690,10 +825,12 @@ ice_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
u32 *regs_buf = (u32 *)p;
unsigned int i;
- regs->version = 1;
+ regs->version = 2;
for (i = 0; i < ARRAY_SIZE(ice_regs_dump_list); ++i)
regs_buf[i] = rd32(hw, ice_regs_dump_list[i]);
+
+ ice_get_extended_regs(netdev, (void *)®s_buf[i]);
}
static u32 ice_get_msglevel(struct net_device *netdev)
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.h b/drivers/net/ethernet/intel/ice/ice_ethtool.h
index ffc8ad180e61..9acccae38625 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.h
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.h
@@ -9,6 +9,25 @@ struct ice_phy_type_to_ethtool {
u8 link_mode;
};
+struct ice_serdes_equalization_to_ethtool {
+ int rx_equalization_pre2;
+ int rx_equalization_pre1;
+ int rx_equalization_post1;
+ int rx_equalization_bflf;
+ int rx_equalization_bfhf;
+ int rx_equalization_drate;
+ int tx_equalization_pre1;
+ int tx_equalization_pre3;
+ int tx_equalization_atten;
+ int tx_equalization_post1;
+ int tx_equalization_pre2;
+};
+
+struct ice_regdump_to_ethtool {
+ /* A multilane port can have max 4 serdes */
+ struct ice_serdes_equalization_to_ethtool equalization[4];
+};
+
/* Port topology from lport i.e.
* serdes mapping, pcsquad, macport, cage etc...
*/
--
2.44.0
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