linux/qed/qed_chain.h

36 	/* The chain's size/prod/cons are kept in 16-bit variables */
39 	/* The chain's size/prod/cons are kept in 32-bit variables  */
76 	/* Fastpath portion of the chain - required for commands such
88 		 * chain pages, respectively to the physical addresses
120 	/* Slowpath of the chain - required for initialization and destruction,
133 	/* Address of first page of the chain - the address is required
140 	/* Total number of elements [for entire chain] */
186 static inline u16 qed_chain_get_prod_idx(const struct qed_chain *chain)
188 	return chain->u.chain16.prod_idx;
191 static inline u16 qed_chain_get_cons_idx(const struct qed_chain *chain)
193 	return chain->u.chain16.cons_idx;
196 static inline u32 qed_chain_get_prod_idx_u32(const struct qed_chain *chain)
198 	return chain->u.chain32.prod_idx;
201 static inline u32 qed_chain_get_cons_idx_u32(const struct qed_chain *chain)
203 	return chain->u.chain32.cons_idx;
206 static inline u16 qed_chain_get_elem_used(const struct qed_chain *chain)
208 	u32 prod = qed_chain_get_prod_idx(chain);
209 	u32 cons = qed_chain_get_cons_idx(chain);
210 	u16 elem_per_page = chain->elem_per_page;
217 	if (chain->mode == QED_CHAIN_MODE_NEXT_PTR)
223 static inline u16 qed_chain_get_elem_left(const struct qed_chain *chain)
225 	return (u16)(chain->capacity - qed_chain_get_elem_used(chain));
228 static inline u32 qed_chain_get_elem_used_u32(const struct qed_chain *chain)
230 	u64 prod = qed_chain_get_prod_idx_u32(chain);
231 	u64 cons = qed_chain_get_cons_idx_u32(chain);
232 	u16 elem_per_page = chain->elem_per_page;
239 	if (chain->mode == QED_CHAIN_MODE_NEXT_PTR)
245 static inline u32 qed_chain_get_elem_left_u32(const struct qed_chain *chain)
247 	return chain->capacity - qed_chain_get_elem_used_u32(chain);
250 static inline u16 qed_chain_get_usable_per_page(const struct qed_chain *chain)
252 	return chain->usable_per_page;
255 static inline u8 qed_chain_get_unusable_per_page(const struct qed_chain *chain)
257 	return chain->elem_unusable;
260 static inline u32 qed_chain_get_page_cnt(const struct qed_chain *chain)
262 	return chain->page_cnt;
265 static inline dma_addr_t qed_chain_get_pbl_phys(const struct qed_chain *chain)
267 	return chain->pbl_sp.table_phys;
272  *                           linked chain.
340  * qed_chain_return_produced(): A chain in which the driver "Produces"
359  * qed_chain_produce(): A chain in which the driver "Produces"
362  *                      responsibility to validate that the chain has room for
401  * qed_chain_get_capacity(): Get the maximum number of BDs in chain
472  * qed_chain_reset(): Resets the chain to its start state.
474  * @p_chain: pointer to a previously allocated chain.
526  *                            chain.
560 	/* p_virt_addr points at this stage to the last page of the chain */
593 		 * positive and lower than the chain's capacity.
618  * qed_chain_pbl_zero_mem(): set chain memory to 0.