From 2959ab247061e67485d83b6af8feb3761ec08cb9 Mon Sep 17 00:00:00 2001 From: Nipun Gupta Date: Mon, 13 Mar 2023 18:56:30 +0530 Subject: cdx: add the cdx bus driver Introduce AMD CDX bus, which provides a mechanism for scanning and probing CDX devices. These devices are memory mapped on system bus for Application Processors(APUs). CDX devices can be changed dynamically in the Fabric and CDX bus interacts with CDX controller to rescan the bus and rediscover the devices. Signed-off-by: Nipun Gupta Reviewed-by: Pieter Jansen van Vuuren Tested-by: Nikhil Agarwal Link: https://lore.kernel.org/r/20230313132636.31850-2-nipun.gupta@amd.com Signed-off-by: Greg Kroah-Hartman --- scripts/mod/devicetable-offsets.c | 4 ++++ scripts/mod/file2alias.c | 12 ++++++++++++ 2 files changed, 16 insertions(+) (limited to 'scripts') diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c index c0d3bcb99138..62dc988df84d 100644 --- a/scripts/mod/devicetable-offsets.c +++ b/scripts/mod/devicetable-offsets.c @@ -262,5 +262,9 @@ int main(void) DEVID(ishtp_device_id); DEVID_FIELD(ishtp_device_id, guid); + DEVID(cdx_device_id); + DEVID_FIELD(cdx_device_id, vendor); + DEVID_FIELD(cdx_device_id, device); + return 0; } diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 91c2e7ba5e52..28da34ba4359 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -1452,6 +1452,17 @@ static int do_dfl_entry(const char *filename, void *symval, char *alias) return 1; } +/* Looks like: cdx:vNdN */ +static int do_cdx_entry(const char *filename, void *symval, + char *alias) +{ + DEF_FIELD(symval, cdx_device_id, vendor); + DEF_FIELD(symval, cdx_device_id, device); + + sprintf(alias, "cdx:v%08Xd%08Xd", vendor, device); + return 1; +} + /* Does namelen bytes of name exactly match the symbol? */ static bool sym_is(const char *name, unsigned namelen, const char *symbol) { @@ -1531,6 +1542,7 @@ static const struct devtable devtable[] = { {"ssam", SIZE_ssam_device_id, do_ssam_entry}, {"dfl", SIZE_dfl_device_id, do_dfl_entry}, {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, + {"cdx", SIZE_cdx_device_id, do_cdx_entry}, }; /* Create MODULE_ALIAS() statements. -- cgit v1.2.3-58-ga151