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authorXu Yilun <yilun.xu@intel.com>2021-01-07 07:37:11 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-01-07 17:21:27 +0300
commit4a224acec5971653bf0e8b6e1d2d0df72a7d57f7 (patch)
treefe50a2852bc66d013f0aa3109751e9a8143d97f2 /scripts/mod/file2alias.c
parent9326eecd9365a5b82220a4011592f7c0209566fc (diff)
downloadlinux-4a224acec5971653bf0e8b6e1d2d0df72a7d57f7.tar.xz
fpga: dfl: add dfl bus support to MODULE_DEVICE_TABLE()
Device Feature List (DFL) is a linked list of feature headers within the device MMIO space. It is used by FPGA to enumerate multiple sub features within it. Each feature can be uniquely identified by DFL type and feature id, which can be read out from feature headers. A dfl bus helps DFL framework modularize DFL device drivers for different sub features. The dfl bus matches its devices and drivers by DFL type and feature id. This patch adds dfl bus support to MODULE_DEVICE_TABLE() by adding info about struct dfl_device_id in devicetable-offsets.c and add a dfl entry point in file2alias.c. Acked-by: Wu Hao <hao.wu@intel.com> Signed-off-by: Xu Yilun <yilun.xu@intel.com> Signed-off-by: Wu Hao <hao.wu@intel.com> Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com> Signed-off-by: Russ Weight <russell.h.weight@intel.com> Signed-off-by: Moritz Fischer <mdf@kernel.org> Link: https://lore.kernel.org/r/20210107043714.991646-6-mdf@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/mod/file2alias.c')
-rw-r--r--scripts/mod/file2alias.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index fb4827027536..7ebabeb1e9c9 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1375,6 +1375,18 @@ static int do_auxiliary_entry(const char *filename, void *symval, char *alias)
return 1;
}
+/* Looks like: dfl:tNfN */
+static int do_dfl_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD(symval, dfl_device_id, type);
+ DEF_FIELD(symval, dfl_device_id, feature_id);
+
+ sprintf(alias, "dfl:t%04Xf%04X", type, feature_id);
+
+ add_wildcard(alias);
+ return 1;
+}
+
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
{
@@ -1450,6 +1462,7 @@ static const struct devtable devtable[] = {
{"wmi", SIZE_wmi_device_id, do_wmi_entry},
{"mhi", SIZE_mhi_device_id, do_mhi_entry},
{"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
+ {"dfl", SIZE_dfl_device_id, do_dfl_entry},
};
/* Create MODULE_ALIAS() statements.