Commit 1adf7ead authored by Jacob Keller's avatar Jacob Keller Committed by Jeff Kirsher
Browse files

ice: enable initial devlink support 



Begin implementing support for the devlink interface with the ice
driver.

The pf structure is currently memory managed through devres, via
a devm_alloc. To mimic this behavior, after allocating the devlink
pointer, use devm_add_action to add a teardown action for releasing the
devlink memory on exit.

The ice hardware is a multi-function PCIe device. Thus, each physical
function will get its own devlink instance. This means that each
function will be treated independently, with its own parameters and
configuration. This is done because the ice driver loads a separate
instance for each function.

Due to this, the implementation does not enable devlink to manage
device-wide resources or configuration, as each physical function will
be treated independently. This is done for simplicity, as managing
a devlink instance across multiple driver instances would significantly
increase the complexity for minimal gain.

Signed-off-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 84a24798

drivers/net/ethernet/intel/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -294,6 +294,7 @@ config ICE 
	tristate "Intel(R) Ethernet Connection E800 Series Support"

	default n

	depends on PCI_MSI

	select NET_DEVLINK

	---help---

	  This driver supports Intel(R) Ethernet Connection E800 Series of

	  devices.  For more information on how to identify your adapter, go

drivers/net/ethernet/intel/ice/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ ice-y := ice_main.o \ 
	 ice_txrx.o	\

	 ice_flex_pipe.o \

	 ice_flow.o	\

	 ice_devlink.o	\

	 ice_ethtool.o

ice-$(CONFIG_PCI_IOV) += ice_virtchnl_pf.o ice_sriov.o

ice-$(CONFIG_DCB) += ice_dcb.o ice_dcb_nl.o ice_dcb_lib.o

drivers/net/ethernet/intel/ice/ice.h

+4 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <linux/ctype.h>

#include <linux/bpf.h>

#include <linux/avf/virtchnl.h>

#include <net/devlink.h>

#include <net/ipv6.h>

#include <net/xdp_sock.h>

#include "ice_devids.h"
@@ -347,6 +348,9 @@ enum ice_pf_flags { 
struct ice_pf {

	struct pci_dev *pdev;



	/* devlink port data */

	struct devlink_port devlink_port;



	/* OS reserved IRQ details */

	struct msix_entry *msix_entries;

	struct ice_res_tracker *irq_tracker;

drivers/net/ethernet/intel/ice/ice_devlink.c

0 → 100644
+117 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2020, Intel Corporation. */



#include "ice.h"

#include "ice_devlink.h"



static const struct devlink_ops ice_devlink_ops = {

};



static void ice_devlink_free(void *devlink_ptr)

{

	devlink_free((struct devlink *)devlink_ptr);

}



/**

 * ice_allocate_pf - Allocate devlink and return PF structure pointer

 * @dev: the device to allocate for

 *

 * 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.

 */

struct ice_pf *ice_allocate_pf(struct device *dev)

{

	struct devlink *devlink;



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

	if (!devlink)

		return NULL;



	/* Add an action to teardown the devlink when unwinding the driver */

	if (devm_add_action(dev, ice_devlink_free, devlink)) {

		devlink_free(devlink);

		return NULL;

	}



	return devlink_priv(devlink);

}



/**

 * ice_devlink_register - Register devlink interface for this PF

 * @pf: the PF to register the devlink for.

 *

 * Register the devlink instance associated with this physical function.

 *

 * Return: zero on success or an error code on failure.

 */

int ice_devlink_register(struct ice_pf *pf)

{

	struct devlink *devlink = priv_to_devlink(pf);

	struct device *dev = ice_pf_to_dev(pf);

	int err;



	err = devlink_register(devlink, dev);

	if (err) {

		dev_err(dev, "devlink registration failed: %d\n", err);

		return err;

	}



	return 0;

}



/**

 * ice_devlink_unregister - Unregister devlink resources for this PF.

 * @pf: the PF structure to cleanup

 *

 * Releases resources used by devlink and cleans up associated memory.

 */

void ice_devlink_unregister(struct ice_pf *pf)

{

	devlink_unregister(priv_to_devlink(pf));

}



/**

 * ice_devlink_create_port - Create a devlink port for this PF

 * @pf: the PF to create a port for

 *

 * Create and register a devlink_port for this PF. Note that although each

 * physical function is connected to a separate devlink instance, the port

 * will still be numbered according to the physical function id.

 *

 * Return: zero on success or an error code on failure.

 */

int ice_devlink_create_port(struct ice_pf *pf)

{

	struct devlink *devlink = priv_to_devlink(pf);

	struct ice_vsi *vsi = ice_get_main_vsi(pf);

	struct device *dev = ice_pf_to_dev(pf);

	int err;



	if (!vsi) {

		dev_err(dev, "%s: unable to find main VSI\n", __func__);

		return -EIO;

	}



	devlink_port_attrs_set(&pf->devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,

			       pf->hw.pf_id, false, 0, NULL, 0);

	err = devlink_port_register(devlink, &pf->devlink_port, pf->hw.pf_id);

	if (err) {

		dev_err(dev, "devlink_port_register failed: %d\n", err);

		return err;

	}



	return 0;

}



/**

 * ice_devlink_destroy_port - Destroy the devlink_port for this PF

 * @pf: the PF to cleanup

 *

 * Unregisters the devlink_port structure associated with this PF.

 */

void ice_devlink_destroy_port(struct ice_pf *pf)

{

	devlink_port_type_clear(&pf->devlink_port);

	devlink_port_unregister(&pf->devlink_port);

}

drivers/net/ethernet/intel/ice/ice_devlink.h

0 → 100644
+14 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/* Copyright (c) 2019, Intel Corporation. */



#ifndef _ICE_DEVLINK_H_

#define _ICE_DEVLINK_H_



struct ice_pf *ice_allocate_pf(struct device *dev);



int ice_devlink_register(struct ice_pf *pf);

void ice_devlink_unregister(struct ice_pf *pf);

int ice_devlink_create_port(struct ice_pf *pf);

void ice_devlink_destroy_port(struct ice_pf *pf);



#endif /* _ICE_DEVLINK_H_ */

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