| Message ID | 20240702153702.3827386-1-Frank.Li@nxp.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [1/1] dt-bindings: PCI: host-generic-pci: Increase maxItems to 8 of ranges | expand |
On Tue, Jul 02, 2024 at 11:37:02AM -0400, Frank Li wrote: > IEEE Std 1275-1994 is Inactive-Withdrawn Standard according to > https://standards.ieee.org/ieee/1275/1932/. I'm not quite sure what the connection is? Is the sentence below a quote from the spec above? Perhaps include the section number it came from? > "require at least one non-prefetchable memory and One or both of > prefetchable Memory and IO Space may also be provided". But it does not > limit maximum ranges number is 3. "But IEEE Std 1275-1994 does not limit maximum ranges to 3"? > Inscrease maximum to 8 because freescale ls1028 and iMX95 use more than > 3 ranges. s/Inscrease/Increase/ > Fix below CHECK_DTBS warning. > arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dtb: pcie@1f0000000: ranges: [[2181038080, 1, 4160749568, 1, 4160749568, 0, 1441792], [3254779904, 1, 4162191360, 1, 4162191360, 0, 458752], [2181038080, 1, 4162650112, 1, 4162650112, 0, 131072], [3254779904, 1, 4162781184, 1, 4162781184, 0, 131072], [2181038080, 1, 4162912256, 1, 4162912256, 0, 131072], [3254779904, 1, 4163043328, 1, 4163043328, 0, 131072], [2181038080, 1, 4227858432, 1, 4227858432, 0, 4194304]] is too long > > Signed-off-by: Frank Li <Frank.Li@nxp.com> > --- > Documentation/devicetree/bindings/pci/host-generic-pci.yaml | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.yaml b/Documentation/devicetree/bindings/pci/host-generic-pci.yaml > index 3484e0b4b412e..506eed7f6c63d 100644 > --- a/Documentation/devicetree/bindings/pci/host-generic-pci.yaml > +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.yaml > @@ -103,7 +103,7 @@ properties: > definition of non-prefetchable memory. One or both of prefetchable Memory > and IO Space may also be provided. > minItems: 1 > - maxItems: 3 > + maxItems: 8 > > dma-coherent: true > iommu-map: true > -- > 2.34.1 >
On Tue, Jul 02, 2024 at 11:43:50AM -0500, Bjorn Helgaas wrote: > On Tue, Jul 02, 2024 at 11:37:02AM -0400, Frank Li wrote: > > IEEE Std 1275-1994 is Inactive-Withdrawn Standard according to > > https://standards.ieee.org/ieee/1275/1932/. > > I'm not quite sure what the connection is? Is the sentence below a > quote from the spec above? Perhaps include the section number it came > from? I quote from original yaml file. This spec is not free. I can't access this spec so far. But I think limited to 3 is not reasonable. Frank Li > > > "require at least one non-prefetchable memory and One or both of > > prefetchable Memory and IO Space may also be provided". But it does not > > limit maximum ranges number is 3. > > "But IEEE Std 1275-1994 does not limit maximum ranges to 3"? > > > Inscrease maximum to 8 because freescale ls1028 and iMX95 use more than > > 3 ranges. > > s/Inscrease/Increase/ > > > Fix below CHECK_DTBS warning. > > arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dtb: pcie@1f0000000: ranges: [[2181038080, 1, 4160749568, 1, 4160749568, 0, 1441792], [3254779904, 1, 4162191360, 1, 4162191360, 0, 458752], [2181038080, 1, 4162650112, 1, 4162650112, 0, 131072], [3254779904, 1, 4162781184, 1, 4162781184, 0, 131072], [2181038080, 1, 4162912256, 1, 4162912256, 0, 131072], [3254779904, 1, 4163043328, 1, 4163043328, 0, 131072], [2181038080, 1, 4227858432, 1, 4227858432, 0, 4194304]] is too long > > > > Signed-off-by: Frank Li <Frank.Li@nxp.com> > > --- > > Documentation/devicetree/bindings/pci/host-generic-pci.yaml | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.yaml b/Documentation/devicetree/bindings/pci/host-generic-pci.yaml > > index 3484e0b4b412e..506eed7f6c63d 100644 > > --- a/Documentation/devicetree/bindings/pci/host-generic-pci.yaml > > +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.yaml > > @@ -103,7 +103,7 @@ properties: > > definition of non-prefetchable memory. One or both of prefetchable Memory > > and IO Space may also be provided. > > minItems: 1 > > - maxItems: 3 > > + maxItems: 8 > > > > dma-coherent: true > > iommu-map: true > > -- > > 2.34.1 > >
On Tue, Jul 2, 2024 at 9:37 AM Frank Li <Frank.Li@nxp.com> wrote: > > IEEE Std 1275-1994 is Inactive-Withdrawn Standard according to > https://standards.ieee.org/ieee/1275/1932/. That has nothing to do with this. > "require at least one non-prefetchable memory and One or both of > prefetchable Memory and IO Space may also be provided". But it does not > limit maximum ranges number is 3. 3 was just my poor assumption that a non-prefetch, prefetchable and IO region would be enough. Not sure why you'd want multiple fragmented regions though. I guess for device assignment based on the comments. > Inscrease maximum to 8 because freescale ls1028 and iMX95 use more than > 3 ranges. Unless there is some actual limit, I would just drop the minItems and maxItems here. Then it will be limited to 32 entries in pci-bus-common.yaml (in dtschema) which is also a 'should be enough' value. Rob
On Wed, Jul 03, 2024 at 11:26:14AM -0600, Rob Herring wrote: > On Tue, Jul 2, 2024 at 9:37 AM Frank Li <Frank.Li@nxp.com> wrote: > > > > IEEE Std 1275-1994 is Inactive-Withdrawn Standard according to > > https://standards.ieee.org/ieee/1275/1932/. > > That has nothing to do with this. > > > "require at least one non-prefetchable memory and One or both of > > prefetchable Memory and IO Space may also be provided". But it does not > > limit maximum ranges number is 3. > > 3 was just my poor assumption that a non-prefetch, prefetchable and IO > region would be enough. Not sure why you'd want multiple fragmented > regions though. I guess for device assignment based on the comments. ENETC is embeded PCI device, hardware address space layout is fragment. Frank > > > Inscrease maximum to 8 because freescale ls1028 and iMX95 use more than > > 3 ranges. > > Unless there is some actual limit, I would just drop the minItems and > maxItems here. Then it will be limited to 32 entries in > pci-bus-common.yaml (in dtschema) which is also a 'should be enough' > value. > > Rob
diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.yaml b/Documentation/devicetree/bindings/pci/host-generic-pci.yaml index 3484e0b4b412e..506eed7f6c63d 100644 --- a/Documentation/devicetree/bindings/pci/host-generic-pci.yaml +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.yaml @@ -103,7 +103,7 @@ properties: definition of non-prefetchable memory. One or both of prefetchable Memory and IO Space may also be provided. minItems: 1 - maxItems: 3 + maxItems: 8 dma-coherent: true iommu-map: true
IEEE Std 1275-1994 is Inactive-Withdrawn Standard according to https://standards.ieee.org/ieee/1275/1932/. "require at least one non-prefetchable memory and One or both of prefetchable Memory and IO Space may also be provided". But it does not limit maximum ranges number is 3. Inscrease maximum to 8 because freescale ls1028 and iMX95 use more than 3 ranges. Fix below CHECK_DTBS warning. arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dtb: pcie@1f0000000: ranges: [[2181038080, 1, 4160749568, 1, 4160749568, 0, 1441792], [3254779904, 1, 4162191360, 1, 4162191360, 0, 458752], [2181038080, 1, 4162650112, 1, 4162650112, 0, 131072], [3254779904, 1, 4162781184, 1, 4162781184, 0, 131072], [2181038080, 1, 4162912256, 1, 4162912256, 0, 131072], [3254779904, 1, 4163043328, 1, 4163043328, 0, 131072], [2181038080, 1, 4227858432, 1, 4227858432, 0, 4194304]] is too long Signed-off-by: Frank Li <Frank.Li@nxp.com> --- Documentation/devicetree/bindings/pci/host-generic-pci.yaml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)