1 /* QLogic qed NIC Driver
2 * Copyright (c) 2015 QLogic Corporation
4 * This software is available under the terms of the GNU General Public License
5 * (GPL) Version 2, available from the file COPYING in the main directory of
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/list.h>
15 #include <linux/slab.h>
16 #include <linux/spinlock.h>
17 #include <linux/qed/qed_chain.h>
22 QED_SPQ_MODE_BLOCK, /* Client will poll a designated mem. address */
23 QED_SPQ_MODE_CB, /* Client supplies a callback */
24 QED_SPQ_MODE_EBLOCK, /* QED should block until completion */
27 struct qed_spq_comp_cb {
28 void (*function)(struct qed_hwfn *,
30 union event_ring_data *,
36 struct pf_start_ramrod_data pf_start;
39 #define EQ_MAX_CREDIT 0xffffffff
42 QED_SPQ_PRIORITY_NORMAL,
43 QED_SPQ_PRIORITY_HIGH,
46 union qed_spq_req_comp {
47 struct qed_spq_comp_cb cb;
51 struct qed_spq_comp_done {
56 struct qed_spq_entry {
57 struct list_head list;
61 /* HSI slow path element */
62 struct slow_path_element elem;
64 union ramrod_data ramrod;
66 enum spq_priority priority;
68 /* pending queue for this entry */
69 struct list_head *queue;
71 enum spq_mode comp_mode;
72 struct qed_spq_comp_cb comp_cb;
73 struct qed_spq_comp_done comp_done; /* SPQ_MODE_EBLOCK */
77 struct qed_chain chain;
78 u8 eq_sb_index; /* index within the SB */
79 __le16 *p_fw_cons; /* ptr to index value */
83 struct qed_chain chain;
87 spinlock_t lock; /* SPQ lock */
89 struct list_head unlimited_pending;
90 struct list_head pending;
91 struct list_head completion_pending;
92 struct list_head free_pool;
94 struct qed_chain chain;
96 /* allocated dma-able memory for spq entries (+ramrod data) */
98 struct qed_spq_entry *p_virt;
100 /* Used as index for completions (returns on EQ by FW) */
104 u32 unlimited_pending_count;
114 * @brief qed_spq_post - Posts a Slow hwfn request to FW, or lacking that
115 * Pends it to the future list.
122 int qed_spq_post(struct qed_hwfn *p_hwfn,
123 struct qed_spq_entry *p_ent,
127 * @brief qed_spq_allocate - Alloocates & initializes the SPQ and EQ.
133 int qed_spq_alloc(struct qed_hwfn *p_hwfn);
136 * @brief qed_spq_setup - Reset the SPQ to its start state.
140 void qed_spq_setup(struct qed_hwfn *p_hwfn);
143 * @brief qed_spq_deallocate - Deallocates the given SPQ struct.
147 void qed_spq_free(struct qed_hwfn *p_hwfn);
150 * @brief qed_spq_get_entry - Obtain an entrry from the spq
161 qed_spq_get_entry(struct qed_hwfn *p_hwfn,
162 struct qed_spq_entry **pp_ent);
165 * @brief qed_spq_return_entry - Return an entry to spq free
171 void qed_spq_return_entry(struct qed_hwfn *p_hwfn,
172 struct qed_spq_entry *p_ent);
174 * @brief qed_eq_allocate - Allocates & initializes an EQ struct
177 * @param num_elem number of elements in the eq
179 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
181 struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn,
185 * @brief qed_eq_setup - Reset the SPQ to its start state.
190 void qed_eq_setup(struct qed_hwfn *p_hwfn,
191 struct qed_eq *p_eq);
194 * @brief qed_eq_deallocate - deallocates the given EQ struct.
199 void qed_eq_free(struct qed_hwfn *p_hwfn,
200 struct qed_eq *p_eq);
203 * @brief qed_eq_prod_update - update the FW with default EQ producer
208 void qed_eq_prod_update(struct qed_hwfn *p_hwfn,
212 * @brief qed_eq_completion - Completes currently pending EQ elements
219 int qed_eq_completion(struct qed_hwfn *p_hwfn,
223 * @brief qed_spq_completion - Completes a single event
226 * @param echo - echo value from cookie (used for determining completion)
227 * @param p_data - data from cookie (used in callback function if applicable)
231 int qed_spq_completion(struct qed_hwfn *p_hwfn,
234 union event_ring_data *p_data);
237 * @brief qed_spq_get_cid - Given p_hwfn, return cid for the hwfn's SPQ
241 * @return u32 - SPQ CID
243 u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn);
246 * @brief qed_consq_alloc - Allocates & initializes an ConsQ
251 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
253 struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn);
256 * @brief qed_consq_setup - Reset the ConsQ to its start
262 void qed_consq_setup(struct qed_hwfn *p_hwfn,
263 struct qed_consq *p_consq);
266 * @brief qed_consq_free - deallocates the given ConsQ struct.
271 void qed_consq_free(struct qed_hwfn *p_hwfn,
272 struct qed_consq *p_consq);
277 * @brief Slow-hwfn low-level commands (Ramrods) function definitions.
280 #define QED_SP_EQ_COMPLETION 0x01
281 #define QED_SP_CQE_COMPLETION 0x02
283 struct qed_sp_init_request_params {
284 size_t ramrod_data_size;
285 enum spq_mode comp_mode;
286 struct qed_spq_comp_cb *p_comp_data;
289 int qed_sp_init_request(struct qed_hwfn *p_hwfn,
290 struct qed_spq_entry **pp_ent,
295 struct qed_sp_init_request_params *p_params);
298 * @brief qed_sp_pf_start - PF Function Start Ramrod
300 * This ramrod is sent to initialize a physical function (PF). It will
301 * configure the function related parameters and write its completion to the
302 * event ring specified in the parameters.
304 * Ramrods complete on the common event ring for the PF. This ring is
305 * allocated by the driver on host memory and its parameters are written
306 * to the internal RAM of the UStorm by the Function Start Ramrod.
314 int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
318 * @brief qed_sp_pf_stop - PF Function Stop Ramrod
320 * This ramrod is sent to close a Physical Function (PF). It is the last ramrod
321 * sent and the last completion written to the PFs Event Ring. This ramrod also
322 * deletes the context for the Slowhwfn connection on this PF.
324 * @note Not required for first packet.
331 int qed_sp_pf_stop(struct qed_hwfn *p_hwfn);