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From: Parav Pandit <parav@mellanox.com>
To: "Saleem, Shiraz" <shiraz.saleem@intel.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@intel.com>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
Cc: "Ismail, Mustafa" <mustafa.ismail@intel.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
	"nhorman@redhat.com" <nhorman@redhat.com>,
	"sassmann@redhat.com" <sassmann@redhat.com>,
	"jgg@ziepe.ca" <jgg@ziepe.ca>
Subject: RE: [RFC PATCH v4 10/25] RDMA/irdma: Add driver framework definitions
Date: Thu, 20 Feb 2020 22:24:05 +0000
Message-ID: <AM0PR05MB4866395BD477FAD269BCAE07D1130@AM0PR05MB4866.eurprd05.prod.outlook.com> (raw)
In-Reply-To: <9DD61F30A802C4429A01CA4200E302A7C60C94AF@fmsmsx124.amr.corp.intel.com>



> From: Saleem, Shiraz <shiraz.saleem@intel.com>
> Sent: Tuesday, February 18, 2020 2:43 PM
> To: Parav Pandit <parav@mellanox.com>; Kirsher, Jeffrey T
> <jeffrey.t.kirsher@intel.com>; davem@davemloft.net;
> gregkh@linuxfoundation.org
> Cc: Ismail, Mustafa <mustafa.ismail@intel.com>; netdev@vger.kernel.org;
> linux-rdma@vger.kernel.org; nhorman@redhat.com; sassmann@redhat.com;
> jgg@ziepe.ca
> Subject: RE: [RFC PATCH v4 10/25] RDMA/irdma: Add driver framework
> definitions
> 
> [..]
> 
> > > +static int irdma_devlink_reload_up(struct devlink *devlink,
> > > +				   struct netlink_ext_ack *extack) {
> > > +	struct irdma_dl_priv *priv = devlink_priv(devlink);
> > > +	union devlink_param_value saved_value;
> > > +	const struct virtbus_dev_id *id = priv->vdev->matched_element;
> >
> > Like irdma_probe(), struct iidc_virtbus_object *vo is accesible for the given
> priv.
> > Please use struct iidc_virtbus_object for any sharing between two drivers.
> > matched_element modification inside the virtbus match() function and
> > accessing pointer to some driver data between two driver through this
> > matched_element is not appropriate.
> 
> We can possibly avoid matched_element and driver data look up here.
> But fundamentally, at probe time (see irdma_gen_probe) the irdma driver
> needs to know which generation type of vdev we bound to. i.e. i40e or ice ?
> since we support both.
> And based on it, extract the driver specific virtbus device object, i.e
> i40e_virtbus_device vs iidc_virtbus_object and init that device.
> 
> Accessing driver_data off the vdev matched entry in irdma_virtbus_id_table
> is how we know this generation info and make the decision.
> 
If there is single irdma driver for two different virtbus device types, it is better to have two instances of virtbus_register_driver() with different matching string/id.
So based on the probe(), it will be clear with virtbus device of interest got added.
This way, code will have clear separation between two device types.

  reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12 19:13 [RFC PATCH v4 00/25] Intel Wired LAN/RDMA Driver Updates 2020-02-11 Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 01/25] virtual-bus: Implementation of Virtual Bus Jeff Kirsher
2020-02-14 17:02   ` Greg KH
2020-02-14 20:34     ` Jason Gunthorpe
2020-02-14 20:43       ` Greg KH
2020-02-15  0:01         ` Jason Gunthorpe
2020-02-15  0:53           ` Greg KH
2020-02-14 20:45       ` Greg KH
2020-02-20 18:55         ` Ertman, David M
2020-02-20 19:27           ` Jason Gunthorpe
2020-02-14 21:22   ` Parav Pandit
2020-02-15  0:08   ` Jason Gunthorpe
2020-02-12 19:14 ` [RFC PATCH v4 02/25] ice: Create and register virtual bus for RDMA Jeff Kirsher
2020-02-14 20:39   ` Jason Gunthorpe
2020-02-20 18:48     ` Ertman, David M
2020-02-20 20:58       ` Jason Gunthorpe
2020-02-12 19:14 ` [RFC PATCH v4 03/25] ice: Complete RDMA peer registration Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 04/25] ice: Support resource allocation requests Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 05/25] ice: Enable event notifications Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 06/25] ice: Allow reset operations Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 07/25] ice: Pass through communications to VF Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 08/25] i40e: Move client header location Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 09/25] i40e: Register a virtbus device to provide RDMA Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 10/25] RDMA/irdma: Add driver framework definitions Jeff Kirsher
2020-02-14 22:13   ` Parav Pandit
2020-02-18 20:42     ` Saleem, Shiraz
2020-02-20 22:24       ` Parav Pandit [this message]
2020-02-20 23:06         ` Jason Gunthorpe
2020-02-21 17:01         ` Saleem, Shiraz
2020-02-21 17:23           ` Parav Pandit
2020-02-21 18:04             ` Jason Gunthorpe
2020-03-19 11:49               ` Martin Habets
2020-02-12 19:14 ` [RFC PATCH v4 11/25] RDMA/irdma: Implement device initialization definitions Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 12/25] RDMA/irdma: Implement HW Admin Queue OPs Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 13/25] RDMA/irdma: Add HMC backing store setup functions Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 14/25] RDMA/irdma: Add privileged UDA queue implementation Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 15/25] RDMA/irdma: Add QoS definitions Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 16/25] RDMA/irdma: Add connection manager Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 17/25] RDMA/irdma: Add PBLE resource manager Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 18/25] RDMA/irdma: Implement device supported verb APIs Jeff Kirsher
2020-02-14 14:54   ` Jason Gunthorpe
2020-02-14 15:49     ` Andrew Boyer
2020-02-14 16:45       ` Jason Gunthorpe
2020-02-18 20:43     ` Saleem, Shiraz
2020-02-12 19:14 ` [RFC PATCH v4 19/25] RDMA/irdma: Add RoCEv2 UD OP support Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 20/25] RDMA/irdma: Add user/kernel shared libraries Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 21/25] RDMA/irdma: Add miscellaneous utility definitions Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 22/25] RDMA/irdma: Add dynamic tracing for CM Jeff Kirsher
2020-02-14 14:53   ` Jason Gunthorpe
2020-02-18 20:43     ` Saleem, Shiraz
2020-02-12 19:14 ` [RFC PATCH v4 23/25] RDMA/irdma: Add ABI definitions Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 24/25] RDMA: Add irdma Kconfig/Makefile and remove i40iw Jeff Kirsher
2020-02-12 19:14 ` [RFC PATCH v4 25/25] RDMA/irdma: Update MAINTAINERS file Jeff Kirsher

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