netdev - RE: [Intel-wired-lan] [PATCH iwl-next v6 07/15] idpf: configure resources for TX queues

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Date: Tue, 30 May 2023 22:56:05 +0000
From: "Singh, Krishneil K" <krishneil.k.singh@...el.com>
To: "Linga, Pavan Kumar" <pavan.kumar.linga@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "willemb@...gle.com" <willemb@...gle.com>, "pabeni@...hat.com"
	<pabeni@...hat.com>, "leon@...nel.org" <leon@...nel.org>, "mst@...hat.com"
	<mst@...hat.com>, "simon.horman@...igine.com" <simon.horman@...igine.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	"stephen@...workplumber.org" <stephen@...workplumber.org>,
	"edumazet@...gle.com" <edumazet@...gle.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "kuba@...nel.org" <kuba@...nel.org>, "Burra, Phani
 R" <phani.r.burra@...el.com>, "decot@...gle.com" <decot@...gle.com>,
	"davem@...emloft.net" <davem@...emloft.net>, "shannon.nelson@....com"
	<shannon.nelson@....com>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next v6 07/15] idpf: configure
 resources for TX queues

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Pavan Kumar Linga
> Sent: Monday, May 22, 2023 5:23 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: willemb@...gle.com; pabeni@...hat.com; leon@...nel.org;
> mst@...hat.com; simon.horman@...igine.com; Brandeburg, Jesse
> <jesse.brandeburg@...el.com>; stephen@...workplumber.org;
> edumazet@...gle.com; Nguyen, Anthony L
> <anthony.l.nguyen@...el.com>; netdev@...r.kernel.org; kuba@...nel.org;
> Burra, Phani R <phani.r.burra@...el.com>; decot@...gle.com;
> davem@...emloft.net; shannon.nelson@....com
> Subject: [Intel-wired-lan] [PATCH iwl-next v6 07/15] idpf: configure resources
> for TX queues
> 
> From: Alan Brady <alan.brady@...el.com>
> 
> IDPF supports two queue models i.e. single queue which is a traditional
> queueing model as well as split queue model. In single queue model,
> the same descriptor queue is used by SW to post descriptors to the HW,
> HW to post completed descriptors to SW. In split queue model, "TX Queues"
> are used to pass buffers from SW to HW and "TX Completion Queues"
> are used to post descriptor completions from HW to SW. Device supports
> asymmetric ratio of TX queues to TX completion queues. Considering
> this, queue group mechanism is used i.e. some TX queues are grouped
> together which will be serviced by only one TX completion queue
> per TX queue group.
> 
> Add all the resources required for the TX queues initialization.
> To start with, allocate memory for the TX queue groups, TX queues and
> TX completion queues. Then, allocate the descriptors for both TX and
> TX completion queues, and bookkeeping buffers for TX queues alone.
> Also, allocate queue vectors for the vport and initialize the TX queue
> related fields for each queue vector.
> 
> Initialize the queue parameters such as q_id, q_type and tail register
> offset with the info received from the device control plane (CP).
> Once all the TX queues are configured, send config TX queue virtchnl
> message to the CP with all the TX queue context information.
> 
> Signed-off-by: Alan Brady <alan.brady@...el.com>
> Co-developed-by: Alice Michael <alice.michael@...el.com>
> Signed-off-by: Alice Michael <alice.michael@...el.com>
> Co-developed-by: Joshua Hay <joshua.a.hay@...el.com>
> Signed-off-by: Joshua Hay <joshua.a.hay@...el.com>
> Co-developed-by: Phani Burra <phani.r.burra@...el.com>
> Signed-off-by: Phani Burra <phani.r.burra@...el.com>
> Co-developed-by: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
> Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
> Reviewed-by: Sridhar Samudrala <sridhar.samudrala@...el.com>
> Reviewed-by: Willem de Bruijn <willemb@...gle.com>
> ---
>  drivers/net/ethernet/intel/idpf/idpf.h        |  51 ++
>  .../net/ethernet/intel/idpf/idpf_lan_txrx.h   |  25 +
>  drivers/net/ethernet/intel/idpf/idpf_lib.c    | 150 +++++
>  drivers/net/ethernet/intel/idpf/idpf_txrx.c   | 541 ++++++++++++++++++
>  drivers/net/ethernet/intel/idpf/idpf_txrx.h   | 176 ++++++
>  .../net/ethernet/intel/idpf/idpf_virtchnl.c   | 402 +++++++++++++
>  6 files changed, 1345 insertions(+)
>  create mode 100644 drivers/net/ethernet/intel/idpf/idpf_lan_txrx.h
> 

Tested-by: Krishneil Singh  <krishneil.k.singh@...el.com>