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Mon, 11 Mar 2024 01:17:59 -0700 (PDT) Date: Mon, 11 Mar 2024 09:17:56 +0100 From: Jiri Pirko To: Mateusz Polchlopek Message-ID: References: <20240305143942.23757-1-mateusz.polchlopek@intel.com> <20240305143942.23757-6-mateusz.polchlopek@intel.com> <5853cc14-f630-4394-9d87-6ee5b1e10228@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5853cc14-f630-4394-9d87-6ee5b1e10228@intel.com> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=resnulli-us.20230601.gappssmtp.com; s=20230601; t=1710145081; x=1710749881; darn=lists.osuosl.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=VKjW2E6pJnvloAYa9ijCq43y2uBmTV9VjXwUZIocyGc=; b=TRD3STEoKC1pz2lWQU9G0l4ZJkw/vz9s1aIWISRiG4zBFgOWmZIugPyIbLzGnOX4Uj k6TdJUlc8EginJYwqcudzEjRdmCVX9uwtMbESG2fyZzp2IGNMCUqCThH14Z9/lP44RWQ wy9ymaCA1bHaCh73ayAnqsa4ZpoO+GzoCJHFPbojjsNgZVbQt1zqC7IRN2jnO8s946+W /Sb1DEsk9l7RLImk0z19rl1LM2FXoVoVFic6Zm0L4TCFBLbkJjYgphHCH7Oc/5H3WeTM yiJuDITPwsMp4DGKRwCZ3iDzA4jb/EXNfkhgiQJdGe5OuNwBxDPAt5EgsjziSS0LCuDl jQKQ== X-Mailman-Original-Authentication-Results: smtp4.osuosl.org; dmarc=none (p=none dis=none) header.from=resnulli.us X-Mailman-Original-Authentication-Results: smtp4.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=resnulli-us.20230601.gappssmtp.com header.i=@resnulli-us.20230601.gappssmtp.com header.a=rsa-sha256 header.s=20230601 header.b=TRD3STEo Subject: Re: [Intel-wired-lan] [PATCH iwl-next v6 5/6] ice: Add tx_scheduling_layers devlink param X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: andrew@lunn.ch, michal.wilczynski@intel.com, netdev@vger.kernel.org, lukasz.czapnik@intel.com, victor.raj@intel.com, kuba@kernel.org, anthony.l.nguyen@intel.com, horms@kernel.org, przemyslaw.kitszel@intel.com, intel-wired-lan@lists.osuosl.org Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" Fri, Mar 08, 2024 at 11:16:25AM CET, mateusz.polchlopek@intel.com wrote: > > >On 3/6/2024 9:41 AM, Jiri Pirko wrote: >> Tue, Mar 05, 2024 at 03:39:41PM CET, mateusz.polchlopek@intel.com wrote: >> > 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 >> > 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 | 175 +++++++++++++++++- >> > .../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 | 7 +- >> > drivers/net/ethernet/intel/ice/ice_nvm.h | 3 + >> > 6 files changed, 195 insertions(+), 9 deletions(-) >> > >> > diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h >> > index 0487c425ae24..e76c388b9905 100644 >> > --- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h >> > +++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h >> > @@ -1684,6 +1684,15 @@ 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 { >> > u8 flags; >> > diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c >> > index c0a89a1b4e88..f94793db460c 100644 >> > --- a/drivers/net/ethernet/intel/ice/ice_devlink.c >> > +++ b/drivers/net/ethernet/intel/ice/ice_devlink.c >> > @@ -770,6 +770,168 @@ ice_devlink_port_unsplit(struct devlink *devlink, struct devlink_port *port, >> > return ice_devlink_port_split(devlink, port, 1, extack); >> > } >> > >> > +/** >> > + * 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; >> >> Just return err. ice_write_one_nvm_block() seems to return it always >> in case of an error. >> >> pw-bot: cr >> >> >> > + >> > +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); >> > + int err; >> > + >> > + err = ice_get_tx_topo_user_sel(pf, &ctx->val.vu8); >> > + if (err) >> > + return -EIO; >> >> Why you return -EIO and not just "err". ice_get_tx_topo_user_sel() seems >> to return proper -EXX values. >> >> >> > + >> > + 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 >> > + * @extack: netlink extended ACK structure >> > + * >> > + * 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 netlink_ext_ack *extack) >> > +{ >> > + struct ice_pf *pf = devlink_priv(devlink); >> > + int err; >> > + >> > + err = ice_update_tx_topo_user_sel(pf, ctx->val.vu8); >> > + if (err) >> > + return -EIO; >> >> Why you return -EIO and not just "err". ice_update_tx_topo_user_sel() seems >> to return proper -EXX values. >> >> >> > + >> > + NL_SET_ERR_MSG_MOD(extack, >> > + "Tx scheduling layers have been changed on this device. You must do the PCI slot powercycle 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, >> > + "Requested feature is not supported by the FW on this device."); >> > + return -EOPNOTSUPP; >> >> Why can't you only return this param in case hw->func_caps.common_cap.tx_sched_topo_comp_mode_en >> is true? Then you don't need this check. >> >> > >Hmm... This comment is not really clear for me, I do not see the opportunity >to change that now. I want to stay with both checks, to verify if capability >is set and if user passed the correct number of layers My point is, during param register, you know if this param is supported or not. Why don't you check hw->func_caps.common_cap.tx_sched_topo_comp_mode_en and register this param only if it is true? > >> > + } >> > + >> > + if (val.vu8 != ICE_SCHED_5_LAYERS && val.vu8 != ICE_SCHED_9_LAYERS) { >> > + NL_SET_ERR_MSG_MOD(extack, >> > + "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 >> > @@ -1478,6 +1640,11 @@ static int ice_devlink_enable_iw_validate(struct devlink *devlink, u32 id, >> > return 0; >> > } >> > >> > +enum ice_param_id { >> > + ICE_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, >> > + ICE_DEVLINK_PARAM_ID_TX_BALANCE, >> > +}; >> > + >> > static const struct devlink_param ice_devlink_params[] = { >> > DEVLINK_PARAM_GENERIC(ENABLE_ROCE, BIT(DEVLINK_PARAM_CMODE_RUNTIME), >> > ice_devlink_enable_roce_get, >> > @@ -1487,7 +1654,13 @@ 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 d4e05d2cb30c..84eab92dc03c 100644 >> > --- a/drivers/net/ethernet/intel/ice/ice_nvm.c >> > +++ b/drivers/net/ethernet/intel/ice/ice_nvm.c >> > @@ -18,10 +18,9 @@ >> > * >> > * Read the NVM using the admin queue commands (0x0701) >> > */ >> > -static 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_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) >> > { >> > struct ice_aq_desc desc; >> > struct ice_aqc_nvm *cmd; >> > diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.h b/drivers/net/ethernet/intel/ice/ice_nvm.h >> > index 774c2317967d..63cdc6bdac58 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 >> >