Re: [Intel-wired-lan] [iwl-next v1 4/7] ice: allocate devlink for subfunction

[Mateusz Polchlopek <mateusz.polchlopek@intel.com>]

On 4/8/2024 12:30 PM, Michal Swiatkowski wrote:
> From: Piotr Raczynski <piotr.raczynski@intel.com>
> 
> Make devlink allocation function generic to use it for PF and for SF.
> 
> Add function for SF devlink port creation. It will be used in next
> patch.
> 
> Signed-off-by: Piotr Raczynski <piotr.raczynski@intel.com>
> Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
> ---
>   .../net/ethernet/intel/ice/devlink/devlink.c  | 39 ++++++++++++--
>   .../net/ethernet/intel/ice/devlink/devlink.h  |  1 +
>   .../ethernet/intel/ice/devlink/devlink_port.c | 51 +++++++++++++++++++
>   .../ethernet/intel/ice/devlink/devlink_port.h |  3 ++
>   4 files changed, 89 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c b/drivers/net/ethernet/intel/ice/devlink/devlink.c
> index 661af04c8eef..05a752fec316 100644
> --- a/drivers/net/ethernet/intel/ice/devlink/devlink.c
> +++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c
> @@ -10,6 +10,7 @@
>   #include "ice_eswitch.h"
>   #include "ice_fw_update.h"
>   #include "ice_dcb_lib.h"
> +#include "ice_sf_eth.h"
>   
>   /* context for devlink info version reporting */
>   struct ice_info_ctx {
> @@ -1286,6 +1287,8 @@ static const struct devlink_ops ice_devlink_ops = {
>   	.port_new = ice_devlink_port_new,
>   };
>   
> +static const struct devlink_ops ice_sf_devlink_ops;
> +
>   static int
>   ice_devlink_enable_roce_get(struct devlink *devlink, u32 id,
>   			    struct devlink_param_gset_ctx *ctx)
> @@ -1417,14 +1420,17 @@ static void ice_devlink_free(void *devlink_ptr)
>   }
>   
>   /**
> - * ice_allocate_pf - Allocate devlink and return PF structure pointer
> + * ice_devlink_alloc - Allocate devlink and return devlink priv pointer
>    * @dev: the device to allocate for
> + * @priv_size: size of the priv memory
> + * @ops: pointer to devlink ops for this device
>    *
> - * Allocate a devlink instance for this device and return the private area as
> - * the PF structure. The devlink memory is kept track of through devres by
> - * adding an action to remove it when unwinding.
> + * Allocate a devlink instance for this device and return the private pointer
> + * The devlink memory is kept track of through devres by adding an action to
> + * remove it when unwinding.
>    */
> -struct ice_pf *ice_allocate_pf(struct device *dev)
> +static void *ice_devlink_alloc(struct device *dev, size_t priv_size,
> +			       const struct devlink_ops *ops)

Why do we need priv_size and ops if those are not used in the function?
Shouldn't it be line:

devlink = devlink_alloc(&ice_devlink_ops, sizeof(struct ice_pf), dev);

in ice_devlink_alloc changed to take the passed param?


>   {
>   	struct devlink *devlink;
>   
> @@ -1439,6 +1445,29 @@ struct ice_pf *ice_allocate_pf(struct device *dev)
>   	return devlink_priv(devlink);
>   }
>   
> +/**
> + * ice_allocate_pf - Allocate devlink and return PF structure pointer
> + * @dev: the device to allocate for
> + *
> + * Allocate a devlink instance for PF.
> + */
> +struct ice_pf *ice_allocate_pf(struct device *dev)
> +{
> +	return ice_devlink_alloc(dev, sizeof(struct ice_pf), &ice_devlink_ops);
> +}
> +
> +/**
> + * ice_allocate_sf - Allocate devlink and return SF structure pointer
> + * @dev: the device to allocate for
> + *
> + * Allocate a devlink instance for SF.
> + */
> +struct ice_sf_priv *ice_allocate_sf(struct device *dev)
> +{
> +	return ice_devlink_alloc(dev, sizeof(struct ice_sf_priv),
> +				 &ice_sf_devlink_ops);
> +}
> +
>   /**
>    * ice_devlink_register - Register devlink interface for this PF
>    * @pf: the PF to register the devlink for.
> diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.h b/drivers/net/ethernet/intel/ice/devlink/devlink.h
> index d291c0e2e17b..1b2a5980d5e8 100644
> --- a/drivers/net/ethernet/intel/ice/devlink/devlink.h
> +++ b/drivers/net/ethernet/intel/ice/devlink/devlink.h
> @@ -5,6 +5,7 @@
>   #define _ICE_DEVLINK_H_
>   
>   struct ice_pf *ice_allocate_pf(struct device *dev);
> +struct ice_sf_priv *ice_allocate_sf(struct device *dev);
>   
>   void ice_devlink_register(struct ice_pf *pf);
>   void ice_devlink_unregister(struct ice_pf *pf);
> diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> index f5e305a71bd0..1b933083f551 100644
> --- a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> +++ b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> @@ -432,6 +432,57 @@ void ice_devlink_destroy_vf_port(struct ice_vf *vf)
>   	devlink_port_unregister(&vf->devlink_port);
>   }
>   
> +/**
> + * ice_devlink_create_sf_dev_port - Register virtual port for a subfunction
> + * @sf_dev: the subfunction device to create a devlink port for
> + *
> + * Register virtual flavour devlink port for the subfunction auxiliary device
> + * created after activating a dynamically added devlink port.
> + *
> + * Return: zero on success or an error code on failure.
> + */
> +int ice_devlink_create_sf_dev_port(struct ice_sf_dev *sf_dev)
> +{
> +	struct devlink_port_attrs attrs = {};
> +	struct devlink_port *devlink_port;
> +	struct ice_dynamic_port *dyn_port;
> +	struct devlink *devlink;
> +	struct ice_vsi *vsi;
> +	struct device *dev;
> +	struct ice_pf *pf;
> +	int err;
> +
> +	dyn_port = sf_dev->dyn_port;
> +	vsi = dyn_port->vsi;
> +	pf = dyn_port->pf;
> +	dev = ice_pf_to_dev(pf);
> +
> +	devlink_port = &sf_dev->priv->devlink_port;
> +
> +	attrs.flavour = DEVLINK_PORT_FLAVOUR_VIRTUAL;
> +
> +	devlink_port_attrs_set(devlink_port, &attrs);
> +	devlink = priv_to_devlink(sf_dev->priv);
> +
> +	err = devl_port_register(devlink, devlink_port, vsi->idx);
> +	if (err)
> +		dev_err(dev, "Failed to create virtual devlink port for auxiliary subfunction device %d",
> +			vsi->idx);
> +
> +	return err;
> +}
> +
> +/**
> + * ice_devlink_destroy_sf_dev_port - Destroy virtual port for a subfunction
> + * @sf_dev: the subfunction device to create a devlink port for
> + *
> + * Unregisters the virtual port associated with this subfunction.
> + */
> +void ice_devlink_destroy_sf_dev_port(struct ice_sf_dev *sf_dev)
> +{
> +	devl_port_unregister(&sf_dev->priv->devlink_port);
> +}
> +
>   /**
>    * ice_activate_dynamic_port - Activate a dynamic port
>    * @dyn_port: dynamic port instance to activate
> diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink_port.h b/drivers/net/ethernet/intel/ice/devlink/devlink_port.h
> index 30146fef64b9..1f66705e0261 100644
> --- a/drivers/net/ethernet/intel/ice/devlink/devlink_port.h
> +++ b/drivers/net/ethernet/intel/ice/devlink/devlink_port.h
> @@ -5,6 +5,7 @@
>   #define _DEVLINK_PORT_H_
>   
>   #include "../ice.h"
> +#include "ice_sf_eth.h"
>   
>   /**
>    * struct ice_dynamic_port - Track dynamically added devlink port instance
> @@ -30,6 +31,8 @@ int ice_devlink_create_pf_port(struct ice_pf *pf);
>   void ice_devlink_destroy_pf_port(struct ice_pf *pf);
>   int ice_devlink_create_vf_port(struct ice_vf *vf);
>   void ice_devlink_destroy_vf_port(struct ice_vf *vf);
> +int ice_devlink_create_sf_dev_port(struct ice_sf_dev *sf_dev);
> +void ice_devlink_destroy_sf_dev_port(struct ice_sf_dev *sf_dev);
>   
>   #define ice_devlink_port_to_dyn(p) \
>   	container_of(port, struct ice_dynamic_port, devlink_port)