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Date: Mon, 11 Jan 2021 17:12:04 -0600 From: Tyrel Datwyler <tyreld@...ux.ibm.com> To: james.bottomley@...senpartnership.com Cc: martin.petersen@...cle.com, linux-scsi@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, brking@...ux.ibm.com, Tyrel Datwyler <tyreld@...ux.ibm.com> Subject: [PATCH v4 00/21] ibmvfc: initial MQ development Recent updates in pHyp Firmware and VIOS releases provide new infrastructure towards enabling Subordinate Command Response Queues (Sub-CRQs) such that each Sub-CRQ is a channel backed by an actual hardware queue in the FC stack on the partner VIOS. Sub-CRQs are registered with the firmware via hypercalls and then negotiated with the VIOS via new Management Datagrams (MADs) for channel setup. This initial implementation adds the necessary Sub-CRQ framework and implements the new MADs for negotiating and assigning a set of Sub-CRQs to associated VIOS HW backed channels. This latest series is completely rebased and reimplemented on top of the recent ("ibmvfc: MQ prepartory locking work") series. [1] [1] https://lore.kernel.org/linux-scsi/20210106201835.1053593-1-tyreld@linux.ibm.com/ changes in v4: * Series rebased and reworked on top of previous ibmvfc locking series * Dropped all previous Reviewed-by tags changes in v3: * Patch 4: changed firmware support logging to dev_warn_once * Patch 6: adjusted locking * Patch 15: dropped logging verbosity, moved cancel event tracking into subqueue * Patch 17: removed write permission for migration module parameters drive hard reset after update to num of scsi channels changes in v2: * Patch 4: NULL'd scsi_scrq reference after deallocation * Patch 6: Added switch case to handle XPORT event * Patch 9: fixed ibmvfc_event leak and double free * added support for cancel command with MQ * added parameter toggles for MQ settings Tyrel Datwyler (21): ibmvfc: add vhost fields and defaults for MQ enablement ibmvfc: move event pool init/free routines ibmvfc: init/free event pool during queue allocation/free ibmvfc: add size parameter to ibmvfc_init_event_pool ibmvfc: define hcall wrapper for registering a Sub-CRQ ibmvfc: add Subordinate CRQ definitions ibmvfc: add alloc/dealloc routines for SCSI Sub-CRQ Channels ibmvfc: add Sub-CRQ IRQ enable/disable routine ibmvfc: add handlers to drain and complete Sub-CRQ responses ibmvfc: define Sub-CRQ interrupt handler routine ibmvfc: map/request irq and register Sub-CRQ interrupt handler ibmvfc: implement channel enquiry and setup commands ibmvfc: advertise client support for using hardware channels ibmvfc: set and track hw queue in ibmvfc_event struct ibmvfc: send commands down HW Sub-CRQ when channelized ibmvfc: register Sub-CRQ handles with VIOS during channel setup ibmvfc: add cancel mad initialization helper ibmvfc: send Cancel MAD down each hw scsi channel ibmvfc: purge scsi channels after transport loss/reset ibmvfc: enable MQ and set reasonable defaults ibmvfc: provide modules parameters for MQ settings drivers/scsi/ibmvscsi/ibmvfc.c | 914 ++++++++++++++++++++++++++++----- drivers/scsi/ibmvscsi/ibmvfc.h | 38 ++ 2 files changed, 824 insertions(+), 128 deletions(-) -- 2.27.0
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