linux-kernel - Re: [PATCH 4/4] dmaengine: idxd: Use DMA API for in-kernel DMA with PASID

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Date:   Thu, 9 Dec 2021 02:37:17 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>
Cc:     kbuild-all@...ts.01.org, Jacob Pan <jacob.jun.pan@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Raj Ashok <ashok.raj@...el.com>
Subject: Re: [PATCH 4/4] dmaengine: idxd: Use DMA API for in-kernel DMA with
 PASID

Hi Jacob,

I love your patch! Yet something to improve:

[auto build test ERROR on joro-iommu/next]
[also build test ERROR on vkoul-dmaengine/next linux/master linus/master v5.16-rc4 next-20211208]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jacob-Pan/Enable-PASID-for-DMA-API-users/20211208-063637
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-a013-20211208 (https://download.01.org/0day-ci/archive/20211209/202112090231.mEK0hpuw-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/018108bcd08fc145526791870b4b58edeecfca1e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jacob-Pan/Enable-PASID-for-DMA-API-users/20211208-063637
        git checkout 018108bcd08fc145526791870b4b58edeecfca1e
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/dma/idxd/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   drivers/dma/idxd/init.c: In function 'idxd_enable_system_pasid':
>> drivers/dma/idxd/init.c:532:10: error: implicit declaration of function 'iommu_enable_pasid_dma'; did you mean 'iommu_enable_nesting'? [-Werror=implicit-function-declaration]
     532 |  pasid = iommu_enable_pasid_dma(&idxd->pdev->dev);
         |          ^~~~~~~~~~~~~~~~~~~~~~
         |          iommu_enable_nesting
   drivers/dma/idxd/init.c: In function 'idxd_disable_system_pasid':
>> drivers/dma/idxd/init.c:544:2: error: implicit declaration of function 'iommu_disable_pasid_dma' [-Werror=implicit-function-declaration]
     544 |  iommu_disable_pasid_dma(&idxd->pdev->dev);
         |  ^~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +532 drivers/dma/idxd/init.c

   527	
   528	static int idxd_enable_system_pasid(struct idxd_device *idxd)
   529	{
   530		u32 pasid;
   531	
 > 532		pasid = iommu_enable_pasid_dma(&idxd->pdev->dev);
   533		if (pasid == INVALID_IOASID) {
   534			dev_err(&idxd->pdev->dev, "No kernel DMA PASID\n");
   535			return -ENODEV;
   536		}
   537		idxd->pasid = pasid;
   538	
   539		return 0;
   540	}
   541	
   542	static void idxd_disable_system_pasid(struct idxd_device *idxd)
   543	{
 > 544		iommu_disable_pasid_dma(&idxd->pdev->dev);
   545		idxd->pasid = 0;
   546	}
   547	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org