From patchwork Fri Oct 6 11:02:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mateusz Polchlopek X-Patchwork-Id: 13411283 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B1A711C2B8 for ; Fri, 6 Oct 2023 11:05:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ilXVJ2X/" Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C08D4CE for ; Fri, 6 Oct 2023 04:05:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1696590347; x=1728126347; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Tkc8agmVOmyhZ70IJFdk21jdiK9X2goN0WvtHdCYIZQ=; b=ilXVJ2X/VpvZiRHMiX2iNyTasIgQiXNZLoVI1RV0B2stVIvVUxoPlmIU splG7nqt3yhVjrP1w1JnrQXiDD/xQtBapyaBRkm6ZHwY77HrHpy/o8Al/ cpK6d1sAV6ZO/gMQTH5ru56ULUVeXf503CZFJJGI7JjLFihGguFo5LAjr pF6tAG0Dse4kB5vFhWNfbX6Mi/58DR+5x8q4I29Wr5AWjo4CAcPZVOu5v TOW+gb3oJt3OPQDUowSjhaBmwxmDgJwJZBWkzq2AOUnG739tuP1Y/5uYJ 7Sy+omHSyRh296vVMTQ5P0EItyB+WFeuV1qXeWEyeMLXHFdRcYaP1Ni0k A==; X-IronPort-AV: E=McAfee;i="6600,9927,10854"; a="2332744" X-IronPort-AV: E=Sophos;i="6.03,203,1694761200"; d="scan'208";a="2332744" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Oct 2023 04:05:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10854"; a="895844428" X-IronPort-AV: E=Sophos;i="6.03,203,1694761200"; d="scan'208";a="895844428" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by fmsmga001.fm.intel.com with ESMTP; 06 Oct 2023 04:04:12 -0700 Received: from fedora.igk.intel.com (Metan_eth.igk.intel.com [10.123.220.124]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 199713636A; Fri, 6 Oct 2023 12:05:43 +0100 (IST) From: Mateusz Polchlopek To: intel-wired-lan@lists.osuosl.org Cc: netdev@vger.kernel.org, Lukasz Czapnik , Przemek Kitszel , Mateusz Polchlopek Subject: [Intel-wired-lan] [PATCH iwl-net v2 4/5] ice: Add tx_scheduling_layers devlink param Date: Fri, 6 Oct 2023 07:02:11 -0400 Message-Id: <20231006110212.96305-5-mateusz.polchlopek@intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20231006110212.96305-1-mateusz.polchlopek@intel.com> References: <20231006110212.96305-1-mateusz.polchlopek@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org From: Lukasz Czapnik 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 - tx_scheduling_layers. 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 5 and 9. Example usage: Show: devlink dev param show pci/0000:4b:00.0 name tx_scheduling_layers pci/0000:4b:00.0: name tx_scheduling_layers type driver-specific values: cmode permanent value 9 Set: devlink dev param set pci/0000:4b:00.0 name tx_scheduling_layers value 5 cmode permanent devlink dev param set pci/0000:4b:00.0 name tx_scheduling_layers value 9 cmode permanent Signed-off-by: Lukasz Czapnik Reviewed-by: Przemek Kitszel Co-developed-by: Mateusz Polchlopek Signed-off-by: Mateusz Polchlopek --- .../net/ethernet/intel/ice/ice_adminq_cmd.h | 9 + drivers/net/ethernet/intel/ice/ice_devlink.c | 174 +++++++++++++++++- .../net/ethernet/intel/ice/ice_fw_update.c | 7 +- .../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, 192 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h index cea1f6f7053f..1202abfb9eb3 100644 --- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h +++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h @@ -1616,6 +1616,15 @@ 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 80dc5445b50d..55974079aa3f 100644 --- a/drivers/net/ethernet/intel/ice/ice_devlink.c +++ b/drivers/net/ethernet/intel/ice/ice_devlink.c @@ -736,6 +736,172 @@ 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 + * @layers: 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, uint8_t *layers) +{ + 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_READ); + 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 (usr_sel.data & ICE_AQC_NVM_TX_TOPO_USER_SEL) + *layers = ICE_SCHED_5_LAYERS; + else + *layers = ICE_SCHED_9_LAYERS; + +exit_release_res: + ice_release_nvm(hw); + + return err; +} + +/** + * ice_update_tx_topo_user_sel - Save user's preference in flash + * @pf: pointer to pf structure + * @layers: value to be saved in flash + * + * Variable "layers" defines user's preference about number of layers in Tx + * Scheduler Topology Tree. This choice should be stored in PFA TLV field + * and 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, int layers) +{ + 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 (layers == ICE_SCHED_5_LAYERS) + 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_tx_sched_layers_get - Get tx_scheduling_layers 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_tx_sched_layers_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 err; + + err = ice_get_tx_topo_user_sel(pf, &ctx->val.vu8); + if (err) { + dev_warn(dev, "Failed to read Tx Scheduler Tree - User Selection data from flash\n"); + return -EIO; + } + + return 0; +} + +/** + * ice_devlink_tx_sched_layers_set - Set tx_scheduling_layers 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_tx_sched_layers_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 err; + + err = ice_update_tx_topo_user_sel(pf, ctx->val.vu8); + if (err) + return -EIO; + + dev_warn(dev, "Tx scheduling layers have been changed on this device. You must reboot the system for the change to take effect."); + + return 0; +} + +/** + * ice_devlink_tx_sched_layers_validate - Validate passed tx_scheduling_layers + * 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: + * - 5 - five layers Tx Scheduler Topology Tree + * - 9 - nine layers Tx Scheduler Topology Tree + * + * Returns zero when passed parameter value is supported. Negative value on + * error. + */ +static int ice_devlink_tx_sched_layers_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; + } + + if (val.vu8 != ICE_SCHED_5_LAYERS && val.vu8 != ICE_SCHED_9_LAYERS) { + NL_SET_ERR_MSG_MOD(extack, "Error: Wrong number of tx scheduler layers provided."); + return -EINVAL; + } + + return 0; +} + /** * ice_tear_down_devlink_rate_tree - removes devlink-rate exported tree * @pf: pf struct @@ -1389,7 +1555,13 @@ 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, + "tx_scheduling_layers", + DEVLINK_PARAM_TYPE_U8, + BIT(DEVLINK_PARAM_CMODE_PERMANENT), + ice_devlink_tx_sched_layers_get, + ice_devlink_tx_sched_layers_set, + ice_devlink_tx_sched_layers_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 319a2d6fe26c..f81db6c107c8 100644 --- a/drivers/net/ethernet/intel/ice/ice_fw_update.c +++ b/drivers/net/ethernet/intel/ice/ice_fw_update.c @@ -286,10 +286,9 @@ ice_send_component_table(struct pldmfw *context, struct pldmfw_component *compon * * Returns: zero on success, or a negative error code on failure. */ -static 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) +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) { u16 completion_module, completion_retval; struct device *dev = ice_pf_to_dev(pf); 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);