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From: Tyrel Datwyler <tyreld@linux.ibm.com>
To: james.bottomley@hansenpartnership.com
Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	brking@linux.ibm.com, Tyrel Datwyler <tyreld@linux.ibm.com>
Subject: [PATCH v4 13/21] ibmvfc: advertise client support for using hardware channels
Date: Mon, 11 Jan 2021 17:12:17 -0600	[thread overview]
Message-ID: <20210111231225.105347-14-tyreld@linux.ibm.com> (raw)
In-Reply-To: <20210111231225.105347-1-tyreld@linux.ibm.com>

Previous patches have plumbed the necessary Sub-CRQ interface and
channel negotiation MADs to fully channelize via hardware backed queues.

Advertise client support via NPIV Login capability
IBMVFC_CAN_USE_CHANNELS when the client bits have MQ enabled via
vhost->mq_enabled, or when channels were already in use during a
subsequent NPIV Login. The later is required because channel support is
only renegotiated after a CRQ pair is broken. Simple NPIV Logout/Logins
require the client to continue to advertise the channel capability until
the CRQ pair between the client is broken.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index a00f38558613..0653d52d4ea0 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1410,6 +1410,10 @@ static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
 
 	login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
 	login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN);
+
+	if (vhost->mq_enabled || vhost->using_channels)
+		login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS);
+
 	login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
 	login_info->async.len = cpu_to_be32(async_crq->size *
 					    sizeof(*async_crq->msgs.async));
-- 
2.27.0


WARNING: multiple messages have this Message-ID (diff)
From: Tyrel Datwyler <tyreld@linux.ibm.com>
To: james.bottomley@hansenpartnership.com
Cc: Tyrel Datwyler <tyreld@linux.ibm.com>,
	martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
	linux-kernel@vger.kernel.org, brking@linux.ibm.com,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v4 13/21] ibmvfc: advertise client support for using hardware channels
Date: Mon, 11 Jan 2021 17:12:17 -0600	[thread overview]
Message-ID: <20210111231225.105347-14-tyreld@linux.ibm.com> (raw)
In-Reply-To: <20210111231225.105347-1-tyreld@linux.ibm.com>

Previous patches have plumbed the necessary Sub-CRQ interface and
channel negotiation MADs to fully channelize via hardware backed queues.

Advertise client support via NPIV Login capability
IBMVFC_CAN_USE_CHANNELS when the client bits have MQ enabled via
vhost->mq_enabled, or when channels were already in use during a
subsequent NPIV Login. The later is required because channel support is
only renegotiated after a CRQ pair is broken. Simple NPIV Logout/Logins
require the client to continue to advertise the channel capability until
the CRQ pair between the client is broken.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index a00f38558613..0653d52d4ea0 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1410,6 +1410,10 @@ static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
 
 	login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ);
 	login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN);
+
+	if (vhost->mq_enabled || vhost->using_channels)
+		login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS);
+
 	login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token);
 	login_info->async.len = cpu_to_be32(async_crq->size *
 					    sizeof(*async_crq->msgs.async));
-- 
2.27.0


  parent reply	other threads:[~2021-01-12  0:50 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-11 23:12 [PATCH v4 00/21] ibmvfc: initial MQ development Tyrel Datwyler
2021-01-11 23:12 ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 01/21] ibmvfc: add vhost fields and defaults for MQ enablement Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-12 11:43   ` John Garry
2021-01-12 11:43     ` John Garry
2021-01-12 22:54   ` Brian King
2021-01-12 22:54     ` Brian King
2021-01-13  0:33     ` Tyrel Datwyler
2021-01-13  0:33       ` Tyrel Datwyler
2021-01-13 17:13       ` Brian King
2021-01-13 17:13         ` Brian King
2021-01-14  1:27         ` Ming Lei
2021-01-14  1:27           ` Ming Lei
2021-01-14 17:24           ` Brian King
2021-01-14 17:24             ` Brian King
2021-01-15  1:47             ` Ming Lei
2021-01-15  1:47               ` Ming Lei
2021-01-11 23:12 ` [PATCH v4 02/21] ibmvfc: move event pool init/free routines Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 03/21] ibmvfc: init/free event pool during queue allocation/free Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 04/21] ibmvfc: add size parameter to ibmvfc_init_event_pool Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 05/21] ibmvfc: define hcall wrapper for registering a Sub-CRQ Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 06/21] ibmvfc: add Subordinate CRQ definitions Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 07/21] ibmvfc: add alloc/dealloc routines for SCSI Sub-CRQ Channels Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 08/21] ibmvfc: add Sub-CRQ IRQ enable/disable routine Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 09/21] ibmvfc: add handlers to drain and complete Sub-CRQ responses Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 10/21] ibmvfc: define Sub-CRQ interrupt handler routine Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 11/21] ibmvfc: map/request irq and register Sub-CRQ interrupt handler Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 12/21] ibmvfc: implement channel enquiry and setup commands Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` Tyrel Datwyler [this message]
2021-01-11 23:12   ` [PATCH v4 13/21] ibmvfc: advertise client support for using hardware channels Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 14/21] ibmvfc: set and track hw queue in ibmvfc_event struct Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 15/21] ibmvfc: send commands down HW Sub-CRQ when channelized Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 16/21] ibmvfc: register Sub-CRQ handles with VIOS during channel setup Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 17/21] ibmvfc: add cancel mad initialization helper Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 18/21] ibmvfc: send Cancel MAD down each hw scsi channel Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-12 21:46   ` Brian King
2021-01-12 21:46     ` Brian King
2021-01-11 23:12 ` [PATCH v4 19/21] ibmvfc: purge scsi channels after transport loss/reset Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 20/21] ibmvfc: enable MQ and set reasonable defaults Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-11 23:12 ` [PATCH v4 21/21] ibmvfc: provide modules parameters for MQ settings Tyrel Datwyler
2021-01-11 23:12   ` Tyrel Datwyler
2021-01-13 18:57   ` Brian King
2021-01-13 18:57     ` Brian King
2021-01-13 18:58 ` [PATCH v4 00/21] ibmvfc: initial MQ development Brian King
2021-01-13 18:58   ` Brian King

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