NPU disable unused PCIe BAR #225
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,90 @@ | ||
| From 2bc0b2e84866a7733fc05a34bd8a93e165db99cc Mon Sep 17 00:00:00 2001 | ||
| From: Madhava Reddy Siddareddygari <msiddare@cisco.com> | ||
| Date: Tue, 9 Mar 2021 13:54:28 -0800 | ||
| Subject: [PATCH] NPU disable other bars | ||
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| This is a port of IOS XR patch | ||
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| Spitfire-pacific-disable-all-bars-other-than-0.patch | ||
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There was a problem hiding this comment. Please provide a git commit hash or URL for this patch. |
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| to Debian kernel. Modifications from IOS XR: | ||
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| a. Only issue an INFO message for changed resources | ||
| b. Include the previous resource data in the INFO message | ||
| c. Prepare for the possibility of applying patch to | ||
| future NPU revisions. | ||
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| Original patch message follows: | ||
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| For Pacific, only bar 0 is valid. Hence disable all other bars as a work | ||
| around for spitfire | ||
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| CDETS: CSCvi15029 | ||
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| Signed-off-by: Gaurav Gupta <gauragup@cisco.com> | ||
| Signed-off-by: Subha Keshavaraj <subkesha@cisco.com> | ||
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There was a problem hiding this comment. It looks like you just copied the output from |
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| --- | ||
| drivers/pci/quirks.c | 50 ++++++++++++++++++++++++++++++++++++++++++++ | ||
| 1 file changed, 50 insertions(+) | ||
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| diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c | ||
| index af2149632..932d219e7 100644 | ||
| --- a/drivers/pci/quirks.c | ||
| +++ b/drivers/pci/quirks.c | ||
| @@ -5462,3 +5462,53 @@ static void apex_pci_fixup_class(struct pci_dev *pdev) | ||
| } | ||
| DECLARE_PCI_FIXUP_CLASS_HEADER(0x1ac1, 0x089a, | ||
| PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class); | ||
| + | ||
| +#define PCI_DEVICE_ID_LEABA_PACIFIC 0xabcd | ||
| +#define PCI_DEVICE_ID_LEABA_GIBRALTAR 0xa001 | ||
| +#define PCI_DEVICE_ID_LEABA_GRAPHENE 0xa003 | ||
| +#define PCI_DEVICE_ID_LEABA_PALLADIUM 0xa004 | ||
| +#define PCI_DEVICE_ID_LEABA_ARGON 0xa005 | ||
| +#define PCI_DEVICE_ID_LEABA_KRYPTON 0xa006 | ||
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| + | ||
| +/* | ||
| + * For Pacific A0, only BAR 0 is valid | ||
|
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| + */ | ||
| +static void silicon_one_fixup(struct pci_dev *dev) | ||
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There was a problem hiding this comment. I’d think, the function name needs to include |
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| +{ | ||
| + int i; | ||
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There was a problem hiding this comment. This does not follow the Linux coding style. Please check patches with There was a problem hiding this comment. Sorry, Firefox display issues in the browser. |
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| + struct resource *r; | ||
| + | ||
| + for (i = 1; i <= PCI_ROM_RESOURCE; i++) { | ||
| + r = &dev->resource[i]; | ||
| + if (!r->start && !r->end && !r->flags) | ||
| + continue; | ||
| + | ||
| + dev_info(&dev->dev, "Cisco Silicon One BAR %d %pR fixed up\n", i, r); | ||
| + r->start = 0; | ||
| + r->end = 0; | ||
| + r->flags = 0; | ||
| + } | ||
| + /* | ||
| + * Pacific device was misbehaving during rescan not enumerating | ||
| + * memory for bar. Due to this HW issue, added this workaround | ||
| + * and verified that during rescan memory gets assigned properly | ||
| + * to the device. This is only a temporary fix. | ||
| + */ | ||
| + dev->class = PCI_CLASS_MEMORY_OTHER << 8; | ||
| + dev_info(&dev->dev, "Cisco Silicon One class adjusted\n"); | ||
| +} | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SYNOPSYS, PCI_DEVICE_ID_LEABA_PACIFIC, | ||
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There was a problem hiding this comment. Why |
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| + silicon_one_fixup); | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_LEABA_PACIFIC, | ||
| + silicon_one_fixup); | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_LEABA_GIBRALTAR, | ||
| + silicon_one_fixup); | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_LEABA_GRAPHENE, | ||
| + silicon_one_fixup); | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_LEABA_PALLADIUM, | ||
| + silicon_one_fixup); | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_LEABA_ARGON, | ||
| + silicon_one_fixup); | ||
| +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_LEABA_KRYPTON, | ||
| + silicon_one_fixup); | ||
| + | ||
| -- | ||
| 2.26.2 | ||
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Please also paste the new log messages from one device to the commit message.
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Still open.