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cxl/mem: Demarcate vendor specific capability IDs 

Vendor capabilities occupy 0x8000 to 0xFFFF according to CXL 2.0 spec
8.2.8.2.1 CXL Device Capabilities. While they are not defined by the
spec, they are allowed and not "unknown". Call this detail out in the
logs to let users easily distinguish the difference.

This patch is a squash of two earlier patches and take in some minor
suggestions from both Vishal and Dan.

Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Link: https://lore.kernel.org/r/20210520204852.1070780-1-ben.widawsky@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Ben Widawsky 2021-05-20 13:48:52 -07:00 committed by Dan Williams
parent 199cf8c3fe
commit dd2a93a814
1 changed files with 4 additions and 1 deletions
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5
drivers/cxl/core.c
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@ -60,7 +60,10 @@ void cxl_setup_device_regs(struct device *dev, void __iomem *base,
regs->memdev = register_block;
break;
default:
dev_dbg(dev, "Unknown cap ID: %d (0x%x)\n", cap_id, offset);
if (cap_id >= 0x8000)
dev_dbg(dev, "Vendor cap ID: %#x offset: %#x\n", cap_id, offset);
else
dev_dbg(dev, "Unknown cap ID: %#x offset: %#x\n", cap_id, offset);
break;
}
}