Commit be0cec6f authored by Alexander Lobakin's avatar Alexander Lobakin Committed by David S. Miller
Browse files

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: default avatarAlexander Lobakin <alobakin@marvell.com>
Signed-off-by: default avatarIgor Russkikh <irusskikh@marvell.com>
Signed-off-by: default avatarMichal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f2aefd20

include/linux/qed/qed_chain.h

+14 −4
Original line number Diff line number Diff line
@@ -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)

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