linux-kernel - Re: [PATCH 2/2] habanalabs: add information about PCIe controller

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Message-ID: <202007311630.Z5saowwe%lkp@intel.com>
Date:   Fri, 31 Jul 2020 17:01:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Oded Gabbay <oded.gabbay@...il.com>, linux-kernel@...r.kernel.org,
        SW_Drivers@...ana.ai
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        Ofir Bitton <obitton@...ana.ai>
Subject: Re: [PATCH 2/2] habanalabs: add information about PCIe controller

Hi Oded,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on next-20200730]
[cannot apply to linux/master linus/master v5.8-rc7]
[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/Oded-Gabbay/habanalabs-Replace-dma-fence-mechanism-with-completions/20200730-211536
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 22362aa30bad6f03b5bcbbeee3cdc61950d40086
config: arm-randconfig-r011-20200731 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c23ae3f18ee3ff11671f4c62ffc66d150b1bcdc2)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 

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

All warnings (new ones prefixed by >>):

>> drivers/misc/habanalabs/common/firmware_if.c:368:14: warning: implicit conversion from '__le64' (aka 'unsigned long long') to '__le32' (aka 'unsigned int') changes value from 72057594037927936 to 0 [-Wconstant-conversion]
           pkt.index = cpu_to_le64(armcp_pcie_throughput_rx);
                     ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/byteorder/generic.h:86:21: note: expanded from macro 'cpu_to_le64'
   #define cpu_to_le64 __cpu_to_le64
                       ^
   include/uapi/linux/byteorder/big_endian.h:31:27: note: expanded from macro '__cpu_to_le64'
   #define __cpu_to_le64(x) ((__force __le64)__swab64((x)))
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.

vim +368 drivers/misc/habanalabs/common/firmware_if.c

   356	
   357	int hl_fw_armcp_pci_counters_get(struct hl_device *hdev,
   358			struct hl_info_pci_counters *counters)
   359	{
   360		struct armcp_packet pkt = {};
   361		long result;
   362		int rc;
   363	
   364		pkt.ctl = cpu_to_le32(ARMCP_PACKET_PCIE_THROUGHPUT_GET <<
   365				ARMCP_PKT_CTL_OPCODE_SHIFT);
   366	
   367		/* Fetch PCI rx counter */
 > 368		pkt.index = cpu_to_le64(armcp_pcie_throughput_rx);
   369		rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
   370						HL_ARMCP_INFO_TIMEOUT_USEC, &result);
   371		if (rc) {
   372			dev_err(hdev->dev,
   373				"Failed to handle ArmCP PCI info pkt, error %d\n", rc);
   374			return rc;
   375		}
   376		counters->rx_throughput = result;
   377	
   378		/* Fetch PCI tx counter */
   379		pkt.index = cpu_to_le64(armcp_pcie_throughput_tx);
   380		rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
   381						HL_ARMCP_INFO_TIMEOUT_USEC, &result);
   382		if (rc) {
   383			dev_err(hdev->dev,
   384				"Failed to handle ArmCP PCI info pkt, error %d\n", rc);
   385			return rc;
   386		}
   387		counters->tx_throughput = result;
   388	
   389		/* Fetch PCI replay counter */
   390		pkt.ctl = cpu_to_le32(ARMCP_PACKET_PCIE_REPLAY_CNT_GET <<
   391				ARMCP_PKT_CTL_OPCODE_SHIFT);
   392	
   393		rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
   394				HL_ARMCP_INFO_TIMEOUT_USEC, &result);
   395		if (rc) {
   396			dev_err(hdev->dev,
   397				"Failed to handle ArmCP PCI info pkt, error %d\n", rc);
   398			return rc;
   399		}
   400		counters->replay_cnt = (u32) result;
   401	
   402		return rc;
   403	}
   404	

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

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