linux-kernel - [PATCH v3 0/4] Allow dyn MSI-X vector allocation of MANA

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Message-Id: <1746785566-4337-1-git-send-email-shradhagupta@linux.microsoft.com>
Date: Fri,  9 May 2025 03:12:46 -0700
From: Shradha Gupta <shradhagupta@...ux.microsoft.com>
To: 
Cc: Shradha Gupta <shradhagupta@...ux.microsoft.com>,
	linux-hyperv@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Nipun Gupta <nipun.gupta@....com>,
	Yury Norov <yury.norov@...il.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Jonathan Cameron <Jonathan.Cameron@...ei.com>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Kevin Tian <kevin.tian@...el.com>,
	Long Li <longli@...rosoft.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Rob Herring <robh@...nel.org>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Krzysztof Wilczy�~Dski <kw@...ux.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Dexuan Cui <decui@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Konstantin Taranov <kotaranov@...rosoft.com>,
	Simon Horman <horms@...nel.org>,
	Leon Romanovsky <leon@...nel.org>,
	Maxim Levitsky <mlevitsk@...hat.com>,
	Erni Sri Satya Vennela <ernis@...ux.microsoft.com>,
	Peter Zijlstra <peterz@...radead.org>,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	Paul Rosswurm <paulros@...rosoft.com>,
	Shradha Gupta <shradhagupta@...rosoft.com>
Subject: [PATCH v3 0/4] Allow dyn MSI-X vector allocation of MANA

In this patchset we want to enable the MANA driver to be able to
allocate MSI-X vectors in PCI dynamically

The first patch exports pci_msix_prepare_desc() in PCI to be able to
correctly prepare descriptors for dynamically added MSI-X vectors

The second patch adds the support of dynamic vector allocation in
pci-hyperv PCI controller by enabling the MSI_FLAG_PCI_MSIX_ALLOC_DYN
flag and using the pci_msix_prepare_desc() exported in first patch.

The third patch is a preparation patch for mana changes to support
dynamic IRQ allocation. It contains changes in irq_setup() to allow
skipping first sibling CPU sets, in case certain IRQs are already
affinitized to them.

The fourth patch has the changes in MANA driver to be able to allocate
MSI-X vectors dynamically. If the support does not exist it defaults to
older behavior.

---
 Changes in v3
 * split the 3rd patch into preparation patch around irq_setup() and
   changes in mana driver to allow dynamic IRQ allocation
 * Add arm64 support for dynamic MSI-X allocation in pci_hyperv
   controller
---
 Changes in v2
 * split the first patch into two(exporting the preapre_desc
   func and using the function and flag in pci-hyperv)
 * replace 'pci vectors' by 'MSI-X vectors'
 * Change the cover letter description to align with changes made
---
Shradha Gupta (4):
  PCI/MSI: Export pci_msix_prepare_desc() for dynamic MSI-X alloc
  PCI: hv: Allow dynamic MSI-X vector allocation
  net: mana: Allow irq_setup() to skip cpus for affinity
  net: mana: Allocate MSI-X vectors dynamically

 .../net/ethernet/microsoft/mana/gdma_main.c   | 264 +++++++++++++++---
 drivers/pci/controller/pci-hyperv.c           |   7 +-
 drivers/pci/msi/irqdomain.c                   |   5 +-
 include/linux/msi.h                           |   2 +
 include/net/mana/gdma.h                       |   8 +-
 5 files changed, 235 insertions(+), 51 deletions(-)

-- 
2.34.1