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Date: Tue, 23 May 2023 10:40:07 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
kuba@...nel.org,
pabeni@...hat.com,
edumazet@...gle.com,
netdev@...r.kernel.org
Cc: Lukasz Czapnik <lukasz.czapnik@...el.com>,
anthony.l.nguyen@...el.com,
przemyslaw.kitszel@...el.com,
jiri@...nulli.us,
Michal Wilczynski <michal.wilczynski@...el.com>,
Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com>
Subject: [PATCH net-next 4/5] ice: Add txbalancing devlink param
From: Lukasz Czapnik <lukasz.czapnik@...el.com>
It was observed that Tx performance was inconsistent across all queues
and/or VSIs and that it was directly connected to existing 9-layer
topology of the Tx scheduler.
Introduce new private devlink param - txbalance. This parameter gives user
flexibility to choose the 5-layer transmit scheduler topology which helps
to smooth out the transmit performance.
Allowed parameter values are true for enabled and false for disabled.
Example usage:
Show:
devlink dev param show pci/0000:4b:00.0 name txbalancing
pci/0000:4b:00.0:
name txbalancing type driver-specific
values:
cmode permanent value true
Set:
devlink dev param set pci/0000:4b:00.0 name txbalancing value true cmode
permanent
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@...el.com>
Signed-off-by: Michal Wilczynski <michal.wilczynski@...el.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
.../net/ethernet/intel/ice/ice_adminq_cmd.h | 9 +
drivers/net/ethernet/intel/ice/ice_devlink.c | 161 +++++++++++++++++-
.../net/ethernet/intel/ice/ice_fw_update.c | 2 +-
.../net/ethernet/intel/ice/ice_fw_update.h | 3 +
drivers/net/ethernet/intel/ice/ice_nvm.c | 2 +-
drivers/net/ethernet/intel/ice/ice_nvm.h | 3 +
6 files changed, 177 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
index d1a449b07fdf..8a624cef0eb0 100644
--- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
@@ -1571,6 +1571,15 @@ struct ice_aqc_nvm {
};
#define ICE_AQC_NVM_START_POINT 0
+#define ICE_AQC_NVM_TX_TOPO_MOD_ID 0x14B
+
+struct ice_aqc_nvm_tx_topo_user_sel {
+ __le16 length;
+ u8 data;
+#define ICE_AQC_NVM_TX_TOPO_USER_SEL BIT(4)
+
+ u8 reserved;
+};
/* NVM Checksum Command (direct, 0x0706) */
struct ice_aqc_nvm_checksum {
diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index bc44cc220818..c716b1442d17 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -736,6 +736,159 @@ ice_devlink_port_unsplit(struct devlink *devlink, struct devlink_port *port,
return ice_devlink_port_split(devlink, port, 1, extack);
}
+enum ice_devlink_param_id {
+ ICE_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
+ ICE_DEVLINK_PARAM_ID_TX_BALANCE,
+};
+
+/**
+ * ice_get_tx_topo_user_sel - Read user's choice from flash
+ * @pf: pointer to pf structure
+ * @txbalance_ena: value read from flash will be saved here
+ *
+ * Reads user's preference for Tx Scheduler Topology Tree from PFA TLV.
+ *
+ * Returns zero when read was successful, negative values otherwise.
+ */
+static int ice_get_tx_topo_user_sel(struct ice_pf *pf, bool *txbalance_ena)
+{
+ struct ice_aqc_nvm_tx_topo_user_sel usr_sel = {};
+ struct ice_hw *hw = &pf->hw;
+ int status;
+
+ status = ice_acquire_nvm(hw, ICE_RES_READ);
+ if (status)
+ return status;
+
+ status = ice_aq_read_nvm(hw, ICE_AQC_NVM_TX_TOPO_MOD_ID, 0,
+ sizeof(usr_sel), &usr_sel, true, true, NULL);
+ ice_release_nvm(hw);
+
+ *txbalance_ena = usr_sel.data & ICE_AQC_NVM_TX_TOPO_USER_SEL;
+
+ return status;
+}
+
+/**
+ * ice_update_tx_topo_user_sel - Save user's preference in flash
+ * @pf: pointer to pf structure
+ * @txbalance_ena: value to be saved in flash
+ *
+ * When txbalance_ena is set to true it means user's preference is to use
+ * five layer Tx Scheduler Topology Tree, when it is set to false then it is
+ * nine layer. This choice should be stored in PFA TLV field and should be
+ * picked up by driver, next time during init.
+ *
+ * Returns zero when save was successful, negative values otherwise.
+ */
+static int ice_update_tx_topo_user_sel(struct ice_pf *pf, bool txbalance_ena)
+{
+ struct ice_aqc_nvm_tx_topo_user_sel usr_sel = {};
+ struct ice_hw *hw = &pf->hw;
+ int err;
+
+ err = ice_acquire_nvm(hw, ICE_RES_WRITE);
+ if (err)
+ return err;
+
+ err = ice_aq_read_nvm(hw, ICE_AQC_NVM_TX_TOPO_MOD_ID, 0,
+ sizeof(usr_sel), &usr_sel, true, true, NULL);
+ if (err)
+ goto exit_release_res;
+
+ if (txbalance_ena)
+ usr_sel.data |= ICE_AQC_NVM_TX_TOPO_USER_SEL;
+ else
+ usr_sel.data &= ~ICE_AQC_NVM_TX_TOPO_USER_SEL;
+
+ err = ice_write_one_nvm_block(pf, ICE_AQC_NVM_TX_TOPO_MOD_ID, 2,
+ sizeof(usr_sel.data), &usr_sel.data,
+ true, NULL, NULL);
+ if (err)
+ err = -EIO;
+
+exit_release_res:
+ ice_release_nvm(hw);
+
+ return err;
+}
+
+/**
+ * ice_devlink_txbalance_get - Get txbalance parameter
+ * @devlink: pointer to the devlink instance
+ * @id: the parameter ID to set
+ * @ctx: context to store the parameter value
+ *
+ * Returns zero on success and negative value on failure.
+ */
+static int ice_devlink_txbalance_get(struct devlink *devlink, u32 id,
+ struct devlink_param_gset_ctx *ctx)
+{
+ struct ice_pf *pf = devlink_priv(devlink);
+ struct device *dev = ice_pf_to_dev(pf);
+ int status;
+
+ status = ice_get_tx_topo_user_sel(pf, &ctx->val.vbool);
+ if (status) {
+ dev_warn(dev, "Failed to read Tx Scheduler Tree - User Selection data from flash\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * ice_devlink_txbalance_set - Set txbalance parameter
+ * @devlink: pointer to the devlink instance
+ * @id: the parameter ID to set
+ * @ctx: context to get the parameter value
+ *
+ * Returns zero on success and negative value on failure.
+ */
+static int ice_devlink_txbalance_set(struct devlink *devlink, u32 id,
+ struct devlink_param_gset_ctx *ctx)
+{
+ struct ice_pf *pf = devlink_priv(devlink);
+ struct device *dev = ice_pf_to_dev(pf);
+ int status;
+
+ status = ice_update_tx_topo_user_sel(pf, ctx->val.vbool);
+ if (status)
+ return -EIO;
+
+ dev_warn(dev, "Transmit balancing setting has been changed on this device. You must reboot the system for the change to take effect");
+
+ return 0;
+}
+
+/**
+ * ice_devlink_txbalance_validate - Validate passed txbalance parameter value
+ * @devlink: unused pointer to devlink instance
+ * @id: the parameter ID to validate
+ * @val: value to validate
+ * @extack: netlink extended ACK structure
+ *
+ * Supported values are:
+ * true - five layer, false - nine layer Tx Scheduler Topology Tree
+ *
+ * Returns zero when passed parameter value is supported. Negative value on
+ * error.
+ */
+static int ice_devlink_txbalance_validate(struct devlink *devlink, u32 id,
+ union devlink_param_value val,
+ struct netlink_ext_ack *extack)
+{
+ struct ice_pf *pf = devlink_priv(devlink);
+ struct ice_hw *hw = &pf->hw;
+
+ if (!hw->func_caps.common_cap.tx_sched_topo_comp_mode_en) {
+ NL_SET_ERR_MSG_MOD(extack, "Error: Requested feature is not supported by the FW on this device. Update the FW and run this command again.");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
/**
* ice_tear_down_devlink_rate_tree - removes devlink-rate exported tree
* @pf: pf struct
@@ -1391,7 +1544,13 @@ static const struct devlink_param ice_devlink_params[] = {
ice_devlink_enable_iw_get,
ice_devlink_enable_iw_set,
ice_devlink_enable_iw_validate),
-
+ DEVLINK_PARAM_DRIVER(ICE_DEVLINK_PARAM_ID_TX_BALANCE,
+ "txbalancing",
+ DEVLINK_PARAM_TYPE_BOOL,
+ BIT(DEVLINK_PARAM_CMODE_PERMANENT),
+ ice_devlink_txbalance_get,
+ ice_devlink_txbalance_set,
+ ice_devlink_txbalance_validate),
};
static void ice_devlink_free(void *devlink_ptr)
diff --git a/drivers/net/ethernet/intel/ice/ice_fw_update.c b/drivers/net/ethernet/intel/ice/ice_fw_update.c
index 3dc5662d62a6..dc5b49104674 100644
--- a/drivers/net/ethernet/intel/ice/ice_fw_update.c
+++ b/drivers/net/ethernet/intel/ice/ice_fw_update.c
@@ -286,7 +286,7 @@ ice_send_component_table(struct pldmfw *context, struct pldmfw_component *compon
*
* Returns: zero on success, or a negative error code on failure.
*/
-static int
+int
ice_write_one_nvm_block(struct ice_pf *pf, u16 module, u32 offset,
u16 block_size, u8 *block, bool last_cmd,
u8 *reset_level, struct netlink_ext_ack *extack)
diff --git a/drivers/net/ethernet/intel/ice/ice_fw_update.h b/drivers/net/ethernet/intel/ice/ice_fw_update.h
index 750574885716..04b200462757 100644
--- a/drivers/net/ethernet/intel/ice/ice_fw_update.h
+++ b/drivers/net/ethernet/intel/ice/ice_fw_update.h
@@ -9,5 +9,8 @@ int ice_devlink_flash_update(struct devlink *devlink,
struct netlink_ext_ack *extack);
int ice_get_pending_updates(struct ice_pf *pf, u8 *pending,
struct netlink_ext_ack *extack);
+int ice_write_one_nvm_block(struct ice_pf *pf, u16 module, u32 offset,
+ u16 block_size, u8 *block, bool last_cmd,
+ u8 *reset_level, struct netlink_ext_ack *extack);
#endif
diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.c b/drivers/net/ethernet/intel/ice/ice_nvm.c
index f6f52a248066..745f2459943f 100644
--- a/drivers/net/ethernet/intel/ice/ice_nvm.c
+++ b/drivers/net/ethernet/intel/ice/ice_nvm.c
@@ -18,7 +18,7 @@
*
* Read the NVM using the admin queue commands (0x0701)
*/
-static int
+int
ice_aq_read_nvm(struct ice_hw *hw, u16 module_typeid, u32 offset, u16 length,
void *data, bool last_command, bool read_shadow_ram,
struct ice_sq_cd *cd)
diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.h b/drivers/net/ethernet/intel/ice/ice_nvm.h
index 774c2317967d..88978b9a95b1 100644
--- a/drivers/net/ethernet/intel/ice/ice_nvm.h
+++ b/drivers/net/ethernet/intel/ice/ice_nvm.h
@@ -14,6 +14,9 @@ struct ice_orom_civd_info {
int ice_acquire_nvm(struct ice_hw *hw, enum ice_aq_res_access_type access);
void ice_release_nvm(struct ice_hw *hw);
+int ice_aq_read_nvm(struct ice_hw *hw, u16 module_typeid, u32 offset, u16 length,
+ void *data, bool last_command, bool read_shadow_ram,
+ struct ice_sq_cd *cd);
int
ice_read_flat_nvm(struct ice_hw *hw, u32 offset, u32 *length, u8 *data,
bool read_shadow_ram);
--
2.38.1
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