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From: Zhu Lingshan <lingshan.zhu@intel•com>
To: jasowang@redhat•com, mst@redhat•com
Cc: netdev@vger•kernel.org,
	virtualization@lists•linux-foundation.org,
	Zhu Lingshan <lingshan.zhu@intel•com>
Subject: [PATCH 0/7] Supoort shared irq for virtqueues
Date: Mon, 10 Jan 2022 13:19:40 +0800	[thread overview]
Message-ID: <20220110051947.84901-1-lingshan.zhu@intel.com> (raw)

On some platforms, it has been observed that a device may fail to
allocate enough MSI-X vectors, under such circumstances, the vqs have
to share a irq/vector.

This series extends irq requester/handlers abilities to deal with:
(granted nvectors, and max_intr = total vq number + 1(config interrupt) )

1)nvectors = max_intr: each vq has its own vector/irq,
config interrupt is enabled, normal case
2)max_intr > nvectors >= 2: vqs share one irq/vector, config interrupt is
enabled
3)nvectors = 1, vqs share one irq/vector, config interrupt is disabled.
Otherwise it fails.

This series also made necessary changes to irq cleaners and related
helpers.

Pleaase help reivew.

Thanks!
Zhu Lingshan

Zhu Lingshan (7):
  vDPA/ifcvf: implement IO read/write helpers in the header file
  vDPA/ifcvf: introduce new helpers to set config vector and vq vectors
  vDPA/ifcvf: implement device MSIX vector allocation helper
  vDPA/ifcvf: implement shared irq handlers for vqs
  vDPA/ifcvf: irq request helpers for both shared and per_vq irq
  vDPA/ifcvf: implement config interrupt request helper
  vDPA/ifcvf: improve irq requester, to handle per_vq/shared/config irq

 drivers/vdpa/ifcvf/ifcvf_base.c |  65 ++++--------
 drivers/vdpa/ifcvf/ifcvf_base.h |  45 +++++++-
 drivers/vdpa/ifcvf/ifcvf_main.c | 179 +++++++++++++++++++++++++++-----
 3 files changed, 215 insertions(+), 74 deletions(-)

-- 
2.27.0

next             reply	other threads:[~2022-01-10  5:27 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-10  5:19 Zhu Lingshan [this message]
2022-01-10  5:19 ` [PATCH 1/7] vDPA/ifcvf: implement IO read/write helpers in the header file Zhu Lingshan
2022-01-10  5:19 ` [PATCH 2/7] vDPA/ifcvf: introduce new helpers to set config vector and vq vectors Zhu Lingshan
2022-01-10  5:19 ` [PATCH 3/7] vDPA/ifcvf: implement device MSIX vector allocation helper Zhu Lingshan
2022-01-10  5:19 ` [PATCH 4/7] vDPA/ifcvf: implement shared irq handlers for vqs Zhu Lingshan
2022-01-10  5:19 ` [PATCH 5/7] vDPA/ifcvf: irq request helpers for both shared and per_vq irq Zhu Lingshan
2022-01-10  5:19 ` [PATCH 6/7] vDPA/ifcvf: implement config interrupt request helper Zhu Lingshan
2022-01-10  5:19 ` [PATCH 7/7] vDPA/ifcvf: improve irq requester, to handle per_vq/shared/config irq Zhu Lingshan
  -- strict thread matches above, loose matches on Subject: below --
2022-01-10  5:18 [PATCH 0/7] Supoort shared irq for virtqueues Zhu Lingshan
2022-01-10  6:05 ` Michael S. Tsirkin
2022-01-13 10:30 ` Michael S. Tsirkin

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