From be0cec6ffd686364bbba2796bbe5eee2fad18181 Mon Sep 17 00:00:00 2001 From: Alexander Lobakin Date: Thu, 23 Jul 2020 01:10:41 +0300 Subject: qed: introduce qed_chain_get_elem_used{,u32}() 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 Signed-off-by: Igor Russkikh Signed-off-by: Michal Kalderon Signed-off-by: David S. Miller --- include/linux/qed/qed_chain.h | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) (limited to 'include/linux/qed') 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) -- cgit v1.2.3-59-g8ed1b