NPU disabled used PCIe BAR #248
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For Cisco ASIC only BAR0 is valid. Not disabling other BAR's was resulting in pci_enable_device function failure in P0 Pacific ASIC's. Further debugging and consultion with Hardware team, issue seems to be related to only P0 version of ASIC and workaround suggested is to disable unused PCI BAR. This is same pull request reviewed ealier, sonic-net#225 Cisco experimented removing this patch, but identified that there are boards in the field with Pacific ASIC. This patch is need for these ASIC's to work, hence re-submitting. Signed-off-by: Madhava Reddy Siddareddygari <msiddare@cisco.com>
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@saiarcot895 fyi |
paulmenzel
suggested changes
Dec 1, 2021
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So this patch was dropped when moving from Linux 4.19 to 5.10? If so, please add that to the merge/pull request and commit message description.
Also, please add somewhere, what NPU means.
Some minor nit:
This patch is need for these ASIC's to work, hence re-submitting.
is needed
saiarcot895
requested changes
Dec 1, 2021
Signed-off-by: Madhava Reddy Siddareddygari <msiddare@cisco.com>
saiarcot895
approved these changes
Dec 3, 2021
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For Cisco ASIC only BAR0 is valid. Not disabling other BAR's
was resulting in pci_enable_device function failure in P0
Pacific ASIC's. Further debugging and consultion with Hardware
team, issue seems to be related to only P0 version of ASIC and
workaround suggested is to disable unused PCI BAR.
This is same pull request reviewed ealier,
#225
Cisco experimented removing this patch, but identified that
there are boards in the field with Pacific ASIC.
This patch is needed for these ASIC's to work, hence re-submitting.
NPU is commonly used name for the packet forwarding ASIC's.
Signed-off-by: Madhava Reddy Siddareddygari msiddare@cisco.com