Re: [PATCH v9 4/4] PCI: endpoint: Add vNTB MSI support

kernel test robot
2022-09-07T20:44:35Z

Hi Frank,

I love your patch! Perhaps something to improve:

[auto build test WARNING on jonmason-ntb/ntb-next]
[also build test WARNING on robh/for-next linus/master v6.0-rc4 next-20220907]
[cannot apply to tip/irq/core]
[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#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Frank-Li/PCI-EP-driver-support-MSI-doorbell-from-host/20220907-115114
base: https://github.com/jonmason/ntb ntb-next
config: loongarch-randconfig-s052-20220906 (https://download.01.org/0day-ci/archive/20220908/202209080437.cNpaoZXx-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://github.com/intel-lab-lkp/linux/commit/0fe017b7ce1e4748acce80d9ddb81b3cd456adbb
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Frank-Li/PCI-EP-driver-support-MSI-doorbell-from-host/20220907-115114
git checkout 0fe017b7ce1e4748acce80d9ddb81b3cd456adbb
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=loongarch SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> drivers/pci/endpoint/functions/pci-epf-vntb.c:567:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __iomem *[assigned] mw_addr @@ got void * @@
drivers/pci/endpoint/functions/pci-epf-vntb.c:567:25: sparse: expected void [noderef] __iomem *[assigned] mw_addr
drivers/pci/endpoint/functions/pci-epf-vntb.c:567:25: sparse: got void *
drivers/pci/endpoint/functions/pci-epf-vntb.c:600:41: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got void [noderef] __iomem *epf_db @@
drivers/pci/endpoint/functions/pci-epf-vntb.c:600:41: sparse: expected void *addr
drivers/pci/endpoint/functions/pci-epf-vntb.c:600:41: sparse: got void [noderef] __iomem *epf_db
drivers/pci/endpoint/functions/pci-epf-vntb.c:1206:33: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] __iomem *base @@ got struct epf_ntb_ctrl *reg @@
drivers/pci/endpoint/functions/pci-epf-vntb.c:1206:33: sparse: expected void [noderef] __iomem *base
drivers/pci/endpoint/functions/pci-epf-vntb.c:1206:33: sparse: got struct epf_ntb_ctrl *reg
drivers/pci/endpoint/functions/pci-epf-vntb.c:1217:33: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] __iomem *base @@ got struct epf_ntb_ctrl *reg @@
drivers/pci/endpoint/functions/pci-epf-vntb.c:1217:33: sparse: expected void [noderef] __iomem *base
drivers/pci/endpoint/functions/pci-epf-vntb.c:1217:33: sparse: got struct epf_ntb_ctrl *reg
drivers/pci/endpoint/functions/pci-epf-vntb.c:1228:33: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] __iomem *base @@ got struct epf_ntb_ctrl *reg @@
drivers/pci/endpoint/functions/pci-epf-vntb.c:1228:33: sparse: expected void [noderef] __iomem *base
drivers/pci/endpoint/functions/pci-epf-vntb.c:1228:33: sparse: got struct epf_ntb_ctrl *reg
drivers/pci/endpoint/functions/pci-epf-vntb.c:1240:33: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] __iomem *base @@ got struct epf_ntb_ctrl *reg @@
drivers/pci/endpoint/functions/pci-epf-vntb.c:1240:33: sparse: expected void [noderef] __iomem *base
drivers/pci/endpoint/functions/pci-epf-vntb.c:1240:33: sparse: got struct epf_ntb_ctrl *reg

vim +567 drivers/pci/endpoint/functions/pci-epf-vntb.c

0fe017b7ce1e47 Frank Li 2022-09-06 536
e35f56bb03304a Frank Li 2022-02-22 537 /**
e35f56bb03304a Frank Li 2022-02-22 538 * epf_ntb_db_bar_init() - Configure Doorbell window BARs
e35f56bb03304a Frank Li 2022-02-22 539 * @ntb: NTB device that facilitates communication between HOST and vHOST
e35f56bb03304a Frank Li 2022-02-22 540 */
e35f56bb03304a Frank Li 2022-02-22 541 static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
e35f56bb03304a Frank Li 2022-02-22 542 {
e35f56bb03304a Frank Li 2022-02-22 543 const struct pci_epc_features *epc_features;
e35f56bb03304a Frank Li 2022-02-22 544 u32 align;
e35f56bb03304a Frank Li 2022-02-22 545 struct device *dev = &ntb->epf->dev;
e35f56bb03304a Frank Li 2022-02-22 546 int ret;
e35f56bb03304a Frank Li 2022-02-22 547 struct pci_epf_bar *epf_bar;
e35f56bb03304a Frank Li 2022-02-22 548 void __iomem *mw_addr;
e35f56bb03304a Frank Li 2022-02-22 549 enum pci_barno barno;
0fe017b7ce1e47 Frank Li 2022-09-06 550 size_t size;
e35f56bb03304a Frank Li 2022-02-22 551
e35f56bb03304a Frank Li 2022-02-22 552 epc_features = pci_epc_get_features(ntb->epf->epc,
e35f56bb03304a Frank Li 2022-02-22 553 ntb->epf->func_no,
e35f56bb03304a Frank Li 2022-02-22 554 ntb->epf->vfunc_no);
e35f56bb03304a Frank Li 2022-02-22 555 align = epc_features->align;
0fe017b7ce1e47 Frank Li 2022-09-06 556 size = epf_ntb_db_size(ntb);
e35f56bb03304a Frank Li 2022-02-22 557
e35f56bb03304a Frank Li 2022-02-22 558 barno = ntb->epf_ntb_bar[BAR_DB];
0fe017b7ce1e47 Frank Li 2022-09-06 559 epf_bar = &ntb->epf->bar[barno];
e35f56bb03304a Frank Li 2022-02-22 560
0fe017b7ce1e47 Frank Li 2022-09-06 561 if (ntb->epf_db_phys) {
0fe017b7ce1e47 Frank Li 2022-09-06 562 mw_addr = NULL;
0fe017b7ce1e47 Frank Li 2022-09-06 563 epf_bar->phys_addr = ntb->epf_db_phys;
0fe017b7ce1e47 Frank Li 2022-09-06 564 epf_bar->barno = barno;
0fe017b7ce1e47 Frank Li 2022-09-06 565 epf_bar->size = size;
0fe017b7ce1e47 Frank Li 2022-09-06 566 } else {
e35f56bb03304a Frank Li 2022-02-22 @567 mw_addr = pci_epf_alloc_space(ntb->epf, size, barno, align, 0);
e35f56bb03304a Frank Li 2022-02-22 568 if (!mw_addr) {
0fe017b7ce1e47 Frank Li 2022-09-06 569 dev_err(dev, "Failed to allocate door bell address\n");
e35f56bb03304a Frank Li 2022-02-22 570 return -ENOMEM;
e35f56bb03304a Frank Li 2022-02-22 571 }
0fe017b7ce1e47 Frank Li 2022-09-06 572 }
e35f56bb03304a Frank Li 2022-02-22 573
e35f56bb03304a Frank Li 2022-02-22 574 ntb->epf_db = mw_addr;
e35f56bb03304a Frank Li 2022-02-22 575
e35f56bb03304a Frank Li 2022-02-22 576 ret = pci_epc_set_bar(ntb->epf->epc, ntb->epf->func_no, ntb->epf->vfunc_no, epf_bar);
e35f56bb03304a Frank Li 2022-02-22 577 if (ret) {
e35f56bb03304a Frank Li 2022-02-22 578 dev_err(dev, "Doorbell BAR set failed\n");
e35f56bb03304a Frank Li 2022-02-22 579 goto err_alloc_peer_mem;
e35f56bb03304a Frank Li 2022-02-22 580 }
e35f56bb03304a Frank Li 2022-02-22 581 return ret;
e35f56bb03304a Frank Li 2022-02-22 582
e35f56bb03304a Frank Li 2022-02-22 583 err_alloc_peer_mem:
e35f56bb03304a Frank Li 2022-02-22 584 pci_epc_mem_free_addr(ntb->epf->epc, epf_bar->phys_addr, mw_addr, epf_bar->size);
e35f56bb03304a Frank Li 2022-02-22 585 return -1;
e35f56bb03304a Frank Li 2022-02-22 586 }
e35f56bb03304a Frank Li 2022-02-22 587

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