Hi Gabriele, On Thu, Mar 02, 2017 at 10:56:16AM +0000, Gabriele Paoloni wrote: > Hi Lorenzo > > Many thanks for putting all of this together. > > > -----Original Message----- > > From: Lorenzo Pieralisi [mailto:lorenzo.pieralisi@xxxxxxx] > > Sent: 27 February 2017 15:14 > > To: linux-pci@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > > Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-arch@xxxxxxxxxxxxxxx; Lorenzo > > Pieralisi; Bjorn Helgaas; Gabriele Paoloni; Wangzhou (B) > > Subject: [PATCH 14/20] PCI: hisi: update PCI config space remap > > function > > > > PCI configuration space should be mapped with a memory region type that > > generates on the CPU host bus non-posted write transations. Update the > > driver to use the devm_pci_remap_cfg* interface to make sure the > > correct > > memory mappings for PCI configuration space are used. > > > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > > Cc: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx> > > Cc: Zhou Wang <wangzhou1@xxxxxxxxxxxxx> > > --- > > drivers/pci/dwc/pcie-hisi.c | 3 +-- > > 1 file changed, 1 insertion(+), 2 deletions(-) > > > > diff --git a/drivers/pci/dwc/pcie-hisi.c b/drivers/pci/dwc/pcie-hisi.c > > index e3e4fed..8042780 100644 > > --- a/drivers/pci/dwc/pcie-hisi.c > > +++ b/drivers/pci/dwc/pcie-hisi.c > > @@ -294,10 +294,9 @@ static int hisi_pcie_probe(struct platform_device > > *pdev) > > } > > > > reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, > > "rc_dbi"); > > - pci->dbi_base = devm_ioremap_resource(dev, reg); > > + pci->dbi_base = devm_pci_remap_cfg_resource(dev, reg); > > if (IS_ERR(pci->dbi_base)) > > return PTR_ERR(pci->dbi_base); > > - > > platform_set_drvdata(pdev, hisi_pcie); > > > > ret = hisi_add_pcie_port(hisi_pcie, pdev); > > -- > > 2.10.0 > > I think you missed a couple of places where cfg space is ioremapped. > I have added these and merged with your changes in the patch below: > > Thanks again > Gab > > --------------------------------- > From: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > Date: Tue, 21 Feb 2017 15:24:34 +0000 > Subject: [PATCH 09/15] PCI: hisi: update PCI config space remap function > > PCI configuration space should be mapped with a memory region type that > generates on the CPU host bus non-posted write transations. Update the > driver to use the devm_pci_remap_cfg* interface to make sure the correct > memory mappings for PCI configuration space are used. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > Signed-off-by: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx> > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Cc: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx> > Cc: Zhou Wang <wangzhou1@xxxxxxxxxxxxx> > --- > drivers/pci/dwc/pcie-hisi.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/drivers/pci/dwc/pcie-hisi.c b/drivers/pci/dwc/pcie-hisi.c > index e3e4fed..a5b542c 100644 > --- a/drivers/pci/dwc/pcie-hisi.c > +++ b/drivers/pci/dwc/pcie-hisi.c > @@ -99,7 +99,7 @@ static int hisi_pcie_init(struct pci_config_window *cfg) > return -ENOMEM; > } > > - reg_base = devm_ioremap(dev, res->start, resource_size(res)); > + reg_base = devm_pci_remap_cfgspace(dev, res->start, resource_size(res)); > if (!reg_base) > return -ENOMEM; > > @@ -294,10 +294,9 @@ static int hisi_pcie_probe(struct platform_device *pdev) > } > > reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbi"); > - pci->dbi_base = devm_ioremap_resource(dev, reg); > + pci->dbi_base = devm_pci_remap_cfg_resource(dev, reg); > if (IS_ERR(pci->dbi_base)) > return PTR_ERR(pci->dbi_base); > - > platform_set_drvdata(pdev, hisi_pcie); > > ret = hisi_add_pcie_port(hisi_pcie, pdev); > @@ -358,7 +357,7 @@ static int hisi_pcie_platform_init(struct pci_config_window *cfg) > return -EINVAL; > } > > - reg_base = devm_ioremap(dev, res->start, resource_size(res)); > + reg_base = devm_pci_remap_cfgspace(dev, res->start, resource_size(res)); > if (!reg_base) > return -ENOMEM; I will fold the changes into v2 (and I hope other host controllers maintainers will follow suit - I do not have enough knowledge of all host bridges drivers internals to understand what ioremap calls need patching). Thanks ! Lorenzo
