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authorPaul Greenwalt <paul.greenwalt@intel.com>2023-10-15 19:43:02 -0400
committerDavid S. Miller <davem@davemloft.net>2023-10-18 09:36:35 +0100
commit26c5334d344db7a9bffa1f5ce87d9045b5e90383 (patch)
tree4b4e5b0aca00ff863156dce380af6a1855b50fb4 /include/linux/ethtool.h
parenta0a86022474304e012aad5d41943fdd31a036284 (diff)
ethtool: Add forced speed to supported link modes maps
The need to map Ethtool forced speeds to Ethtool supported link modes is common among drivers. To support this, add a common structure for forced speed maps and a function to init them. This is solution was originally introduced in commit 1d4e4ecccb11 ("qede: populate supported link modes maps on module init") for qede driver. ethtool_forced_speed_maps_init() should be called during driver init with an array of struct ethtool_forced_speed_map to populate the mapping. Definitions for maps themselves are left in the driver code, as the sets of supported link modes may vary between the devices. Suggested-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com> Signed-off-by: Pawel Chmielewski <pawel.chmielewski@intel.com> Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/ethtool.h')
-rw-r--r--include/linux/ethtool.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 62b61527bcc4..8e91e8b8a693 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -13,6 +13,7 @@
#ifndef _LINUX_ETHTOOL_H
#define _LINUX_ETHTOOL_H
+#include <linux/linkmode.h>
#include <linux/bitmap.h>
#include <linux/compat.h>
#include <linux/if_ether.h>
@@ -1052,4 +1053,40 @@ static inline int ethtool_mm_frag_size_min_to_add(u32 val_min, u32 *val_add,
* next string.
*/
extern __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...);
+
+/* Link mode to forced speed capabilities maps */
+struct ethtool_forced_speed_map {
+ u32 speed;
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(caps);
+
+ const u32 *cap_arr;
+ u32 arr_size;
+};
+
+#define ETHTOOL_FORCED_SPEED_MAP(prefix, value) \
+{ \
+ .speed = SPEED_##value, \
+ .cap_arr = prefix##_##value, \
+ .arr_size = ARRAY_SIZE(prefix##_##value), \
+}
+
+/**
+ * ethtool_forced_speed_maps_init
+ * @maps: Pointer to an array of Ethtool forced speed map
+ * @size: Array size
+ *
+ * Initialize an array of Ethtool forced speed map to Ethtool link modes. This
+ * should be called during driver module init.
+ */
+static inline void
+ethtool_forced_speed_maps_init(struct ethtool_forced_speed_map *maps, u32 size)
+{
+ for (u32 i = 0; i < size; i++) {
+ struct ethtool_forced_speed_map *map = &maps[i];
+
+ linkmode_set_bit_array(map->cap_arr, map->arr_size, map->caps);
+ map->cap_arr = NULL;
+ map->arr_size = 0;
+ }
+}
#endif /* _LINUX_ETHTOOL_H */