From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C76E127E7F0; Wed, 11 Jun 2025 14:09:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749650988; cv=none; b=g8BVUNEE7nE7QuI29Plgp9ow8uVafyESZygDGv8tkaRCQgxZBuRIbSW+qdGE7TASfb5yHdXL8n7Y8XGQp18uWESPeC8hOPaFUCF4ERk0+xT6Dr9BMygqd4gFWQT60IxFskuLdERH4Cr0RKpBUJ+q1o06jEtmZftrxhoGH+9zUys= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749650988; c=relaxed/simple; bh=AK8EHYOYCq+SXbAg7Z3/UJ2hTdChIAXHjEBP1cncQwc=; h=From:To:Cc:Subject:Date:Message-Id; b=H9Jwxj6BFY33HERdMXY4Hr8Kf0BEApZ9TsAVs44zXx8Ly1005HI5KhCvFDb1t7uAmIcHhyO+xfkddRnOyi0Ynn+9+oAH9U+CH8eH10pYM0G56oxUB9uTktG1Va8exP8zFQU5zL1+5tnxAx+KJLjMvhu4FnQVTclefavJ/tavDwc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=BsL1rm0l; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="BsL1rm0l" Received: by linux.microsoft.com (Postfix, from userid 1134) id 17C582115191; Wed, 11 Jun 2025 07:09:46 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 17C582115191 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1749650986; bh=11QiVZcZI7HpQy9zTwvvYDXhgBE3dYR024Si5/zihXI=; h=From:To:Cc:Subject:Date:From; b=BsL1rm0lRBhLTVe8xwSQsnjJN3OAptJKwkNoU+LcAPvFp0UQcwr9aE4CbvB+1YfUw 5Do84Mgv9/w1ewysOpHypiSiBacjohIaaRGYkzJ1nf3a9183LZAfNgO9K6yJO/idRj gom2c5DcaDfk0JpguLKUABzpU0zcYlTsalbDlgO4= From: Shradha Gupta To: Cc: Shradha Gupta , linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Nipun Gupta , Yury Norov , Jason Gunthorpe , Jonathan Cameron , Anna-Maria Behnsen , Kevin Tian , Long Li , Thomas Gleixner , Bjorn Helgaas , Rob Herring , Manivannan Sadhasivam , =?UTF-8?q?Krzysztof=20Wilczy=EF=BF=BD=7EDski?= , Lorenzo Pieralisi , Dexuan Cui , Wei Liu , Haiyang Zhang , "K. Y. Srinivasan" , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Konstantin Taranov , Simon Horman , Leon Romanovsky , Maxim Levitsky , Erni Sri Satya Vennela , Peter Zijlstra , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, Paul Rosswurm , Shradha Gupta Subject: [PATCH v6 0/5] Allow dyn MSI-X vector allocation of MANA Date: Wed, 11 Jun 2025 07:09:44 -0700 Message-Id: <1749650984-9193-1-git-send-email-shradhagupta@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 adds a detailed description of the irq_setup(), to help understand the function design better. The fourth 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 fifth 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. Since this patchset has patches from PCI and net tree, I am not entirely sure what should be the target tree. Any suggestions/recommendations on the same are welcomed. --- Changes in v6 * rebased to linux-next's v6.16-rc1 as per Jakub's suggestion --- Changes in v5 * Added Yury as Author of the 3rd patch * Fixed base commit information in the cover letter * Correctly initialized start_irqs, so that it is cleaned properly * rearranged the cpu_lock to minimize the critical section --- Change in v4 * add a patch describing the functionality of irq_setup() through a comment * In irq_setup(), avoid using a label next_cpumask: * modify the changes in MANA patch about restructuring the error handling path in mana_gd_setup_dyn_irqs() * modify the mana_gd_setup_irqs() to simplify handling around start_irq_index * add warning if an invalid gic is returned * place the xa_destroy() cleanup in mana_gd_remove --- 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 allocations 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 Yury Norov (1): net: mana: explain irq_setup() algorithm .../net/ethernet/microsoft/mana/gdma_main.c | 366 ++++++++++++++---- drivers/pci/controller/pci-hyperv.c | 3 +- drivers/pci/msi/irqdomain.c | 5 +- include/linux/msi.h | 2 + include/net/mana/gdma.h | 8 +- 5 files changed, 294 insertions(+), 90 deletions(-) base-commit: 19a60293b9925080d97f22f122aca3fc46dadaf9 -- 2.34.1