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| author |   Alexander Lobakin <alobakin@marvell.com> | 2020-07-23 01:10:41 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-07-22 18:19:03 -0700 |
| commit | be0cec6ffd686364bbba2796bbe5eee2fad18181 (patch) | |
| tree | a18079609fee07db3de80ffe4aaf1b7eb48bd520 /include/linux/qed | |
| parent | qed: optimize common chain accessors (diff) | |
| download | linux-dev-be0cec6ffd686364bbba2796bbe5eee2fad18181.tar.xz linux-dev-be0cec6ffd686364bbba2796bbe5eee2fad18181.zip | |
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 <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/qed')
| -rw-r--r-- | include/linux/qed/qed_chain.h | 18 |
1 files 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) |