| Message ID | 20171201061311.16691-2-vigneshr@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Dec 01, 2017 at 11:43:08AM +0530, Vignesh R wrote: > Errata i870 is applicable in both EP and RC mode. Therefore rename > function dra7xx_pcie_ep_unaligned_memaccess(), that implements errata > workaround, to dra7xx_pcie_unaligned_memaccess() and call it from a > common place. So, that errata workaround is applied for both modes of > operation. > > Reported-by: Chris Welch <Chris.Welch@viavisolutions.com> > Signed-off-by: Vignesh R <vigneshr@ti.com> > --- > drivers/pci/dwc/pci-dra7xx.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) I need Kishon's ACK to apply it, thanks. Lorenzo > diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c > index e77a4ceed74c..53f721d1cc40 100644 > --- a/drivers/pci/dwc/pci-dra7xx.c > +++ b/drivers/pci/dwc/pci-dra7xx.c > @@ -546,7 +546,7 @@ static const struct of_device_id of_dra7xx_pcie_match[] = { > }; > > /* > - * dra7xx_pcie_ep_unaligned_memaccess: workaround for AM572x/AM571x Errata i870 > + * dra7xx_pcie_unaligned_memaccess: workaround for AM572x/AM571x Errata i870 > * @dra7xx: the dra7xx device where the workaround should be applied > * > * Access to the PCIe slave port that are not 32-bit aligned will result > @@ -556,7 +556,7 @@ static const struct of_device_id of_dra7xx_pcie_match[] = { > * > * To avoid this issue set PCIE_SS1_AXI2OCP_LEGACY_MODE_ENABLE to 1. > */ > -static int dra7xx_pcie_ep_unaligned_memaccess(struct device *dev) > +static int dra7xx_pcie_unaligned_memaccess(struct device *dev) > { > int ret; > struct device_node *np = dev->of_node; > @@ -703,6 +703,10 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev) > if (dra7xx->link_gen < 0 || dra7xx->link_gen > 2) > dra7xx->link_gen = 2; > > + ret = dra7xx_pcie_unaligned_memaccess(dev); > + if (ret) > + goto err_gpio; > + > switch (mode) { > case DW_PCIE_RC_TYPE: > dra7xx_pcie_writel(dra7xx, PCIECTRL_TI_CONF_DEVICE_TYPE, > @@ -715,10 +719,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev) > dra7xx_pcie_writel(dra7xx, PCIECTRL_TI_CONF_DEVICE_TYPE, > DEVICE_TYPE_EP); > > - ret = dra7xx_pcie_ep_unaligned_memaccess(dev); > - if (ret) > - goto err_gpio; > - > ret = dra7xx_add_pcie_ep(dra7xx, pdev); > if (ret < 0) > goto err_gpio; > -- > 2.15.0 > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tuesday 19 December 2017 09:54 PM, Lorenzo Pieralisi wrote: > On Fri, Dec 01, 2017 at 11:43:08AM +0530, Vignesh R wrote: >> Errata i870 is applicable in both EP and RC mode. Therefore rename >> function dra7xx_pcie_ep_unaligned_memaccess(), that implements errata >> workaround, to dra7xx_pcie_unaligned_memaccess() and call it from a >> common place. So, that errata workaround is applied for both modes of >> operation. >> >> Reported-by: Chris Welch <Chris.Welch@viavisolutions.com> >> Signed-off-by: Vignesh R <vigneshr@ti.com> >> --- >> drivers/pci/dwc/pci-dra7xx.c | 12 ++++++------ >> 1 file changed, 6 insertions(+), 6 deletions(-) > > I need Kishon's ACK to apply it, thanks. There are some enhancements to this patch. Will submit a v2 shortly. Please ignore this version for now. Thanks!
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c index e77a4ceed74c..53f721d1cc40 100644 --- a/drivers/pci/dwc/pci-dra7xx.c +++ b/drivers/pci/dwc/pci-dra7xx.c @@ -546,7 +546,7 @@ static const struct of_device_id of_dra7xx_pcie_match[] = { }; /* - * dra7xx_pcie_ep_unaligned_memaccess: workaround for AM572x/AM571x Errata i870 + * dra7xx_pcie_unaligned_memaccess: workaround for AM572x/AM571x Errata i870 * @dra7xx: the dra7xx device where the workaround should be applied * * Access to the PCIe slave port that are not 32-bit aligned will result @@ -556,7 +556,7 @@ static const struct of_device_id of_dra7xx_pcie_match[] = { * * To avoid this issue set PCIE_SS1_AXI2OCP_LEGACY_MODE_ENABLE to 1. */ -static int dra7xx_pcie_ep_unaligned_memaccess(struct device *dev) +static int dra7xx_pcie_unaligned_memaccess(struct device *dev) { int ret; struct device_node *np = dev->of_node; @@ -703,6 +703,10 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev) if (dra7xx->link_gen < 0 || dra7xx->link_gen > 2) dra7xx->link_gen = 2; + ret = dra7xx_pcie_unaligned_memaccess(dev); + if (ret) + goto err_gpio; + switch (mode) { case DW_PCIE_RC_TYPE: dra7xx_pcie_writel(dra7xx, PCIECTRL_TI_CONF_DEVICE_TYPE, @@ -715,10 +719,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev) dra7xx_pcie_writel(dra7xx, PCIECTRL_TI_CONF_DEVICE_TYPE, DEVICE_TYPE_EP); - ret = dra7xx_pcie_ep_unaligned_memaccess(dev); - if (ret) - goto err_gpio; - ret = dra7xx_add_pcie_ep(dra7xx, pdev); if (ret < 0) goto err_gpio;
Errata i870 is applicable in both EP and RC mode. Therefore rename function dra7xx_pcie_ep_unaligned_memaccess(), that implements errata workaround, to dra7xx_pcie_unaligned_memaccess() and call it from a common place. So, that errata workaround is applied for both modes of operation. Reported-by: Chris Welch <Chris.Welch@viavisolutions.com> Signed-off-by: Vignesh R <vigneshr@ti.com> --- drivers/pci/dwc/pci-dra7xx.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)