Add reverse-variants of qed_chain_get_elem_left{,u32}() to be able to
know current chain occupation. They will be used in the upcoming qede
XDP_REDIRECT code.
They share most of the logics with the mentioned ones, so were reused
to collapse the latters.
Signed-off-by: Alexander Lobakin <alobakin@xxxxxxxxxxx>
Signed-off-by: Igor Russkikh <irusskikh@xxxxxxxxxxx>
Signed-off-by: Michal Kalderon <michal.kalderon@xxxxxxxxxxx>
---
include/linux/qed/qed_chain.h | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/include/linux/qed/qed_chain.h b/include/linux/qed/qed_chain.h
index 434479e2ab65..4d58dc8943f0 100644
--- a/include/linux/qed/qed_chain.h
+++ b/include/linux/qed/qed_chain.h
@@ -203,7 +203,7 @@ static inline u32 qed_chain_get_cons_idx_u32(const struct qed_chain *chain)
return chain->u.chain32.cons_idx;
}
-static inline u16 qed_chain_get_elem_left(const struct qed_chain *chain)
+static inline u16 qed_chain_get_elem_used(const struct qed_chain *chain)
{
u32 prod = qed_chain_get_prod_idx(chain);
u32 cons = qed_chain_get_cons_idx(chain);
@@ -217,10 +217,15 @@ static inline u16 qed_chain_get_elem_left(const struct qed_chain *chain)
if (chain->mode == QED_CHAIN_MODE_NEXT_PTR)
used -= (u16)(prod / elem_per_page - cons / elem_per_page);
- return (u16)(chain->capacity - used);
+ return used;
}
-static inline u32 qed_chain_get_elem_left_u32(const struct qed_chain *chain)
+static inline u16 qed_chain_get_elem_left(const struct qed_chain *chain)
+{
+ return (u16)(chain->capacity - qed_chain_get_elem_used(chain));
+}
+
+static inline u32 qed_chain_get_elem_used_u32(const struct qed_chain *chain)
{
u64 prod = qed_chain_get_prod_idx_u32(chain);
u64 cons = qed_chain_get_cons_idx_u32(chain);
@@ -234,7 +239,12 @@ static inline u32 qed_chain_get_elem_left_u32(const struct qed_chain *chain)
if (chain->mode == QED_CHAIN_MODE_NEXT_PTR)
used -= (u32)(prod / elem_per_page - cons / elem_per_page);
- return chain->capacity - used;
+ return used;
+}
+
+static inline u32 qed_chain_get_elem_left_u32(const struct qed_chain *chain)
+{
+ return chain->capacity - qed_chain_get_elem_used_u32(chain);
}
static inline u16 qed_chain_get_usable_per_page(const struct qed_chain *chain)
--
2.25.1
