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 * @brief qed_eth_cqe_completion - handles the completion of a
37 * ramrod on the cqe ring
44 int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn,
45 struct eth_slow_path_rx_cqe *cqe);
50 * QED Slow-hwfn queue interface
54 struct pf_start_ramrod_data pf_start;
55 struct pf_update_ramrod_data pf_update;
56 struct rx_queue_start_ramrod_data rx_queue_start;
57 struct rx_queue_update_ramrod_data rx_queue_update;
58 struct rx_queue_stop_ramrod_data rx_queue_stop;
59 struct tx_queue_start_ramrod_data tx_queue_start;
60 struct tx_queue_stop_ramrod_data tx_queue_stop;
61 struct vport_start_ramrod_data vport_start;
62 struct vport_stop_ramrod_data vport_stop;
63 struct vport_update_ramrod_data vport_update;
64 struct core_rx_start_ramrod_data core_rx_queue_start;
65 struct core_rx_stop_ramrod_data core_rx_queue_stop;
66 struct core_tx_start_ramrod_data core_tx_queue_start;
67 struct core_tx_stop_ramrod_data core_tx_queue_stop;
68 struct vport_filter_update_ramrod_data vport_filter_update;
70 struct rdma_init_func_ramrod_data rdma_init_func;
71 struct rdma_close_func_ramrod_data rdma_close_func;
72 struct rdma_register_tid_ramrod_data rdma_register_tid;
73 struct rdma_deregister_tid_ramrod_data rdma_deregister_tid;
74 struct roce_create_qp_resp_ramrod_data roce_create_qp_resp;
75 struct roce_create_qp_req_ramrod_data roce_create_qp_req;
76 struct roce_modify_qp_resp_ramrod_data roce_modify_qp_resp;
77 struct roce_modify_qp_req_ramrod_data roce_modify_qp_req;
78 struct roce_query_qp_resp_ramrod_data roce_query_qp_resp;
79 struct roce_query_qp_req_ramrod_data roce_query_qp_req;
80 struct roce_destroy_qp_resp_ramrod_data roce_destroy_qp_resp;
81 struct roce_destroy_qp_req_ramrod_data roce_destroy_qp_req;
82 struct rdma_create_cq_ramrod_data rdma_create_cq;
83 struct rdma_resize_cq_ramrod_data rdma_resize_cq;
84 struct rdma_destroy_cq_ramrod_data rdma_destroy_cq;
85 struct rdma_srq_create_ramrod_data rdma_create_srq;
86 struct rdma_srq_destroy_ramrod_data rdma_destroy_srq;
87 struct rdma_srq_modify_ramrod_data rdma_modify_srq;
88 struct roce_init_func_ramrod_data roce_init_func;
90 struct iscsi_slow_path_hdr iscsi_empty;
91 struct iscsi_init_ramrod_params iscsi_init;
92 struct iscsi_spe_func_dstry iscsi_destroy;
93 struct iscsi_spe_conn_offload iscsi_conn_offload;
94 struct iscsi_conn_update_ramrod_params iscsi_conn_update;
95 struct iscsi_spe_conn_termination iscsi_conn_terminate;
97 struct vf_start_ramrod_data vf_start;
98 struct vf_stop_ramrod_data vf_stop;
101 #define EQ_MAX_CREDIT 0xffffffff
104 QED_SPQ_PRIORITY_NORMAL,
105 QED_SPQ_PRIORITY_HIGH,
108 union qed_spq_req_comp {
109 struct qed_spq_comp_cb cb;
113 struct qed_spq_comp_done {
118 struct qed_spq_entry {
119 struct list_head list;
123 /* HSI slow path element */
124 struct slow_path_element elem;
126 union ramrod_data ramrod;
128 enum spq_priority priority;
130 /* pending queue for this entry */
131 struct list_head *queue;
133 enum spq_mode comp_mode;
134 struct qed_spq_comp_cb comp_cb;
135 struct qed_spq_comp_done comp_done; /* SPQ_MODE_EBLOCK */
139 struct qed_chain chain;
140 u8 eq_sb_index; /* index within the SB */
141 __le16 *p_fw_cons; /* ptr to index value */
145 struct qed_chain chain;
149 spinlock_t lock; /* SPQ lock */
151 struct list_head unlimited_pending;
152 struct list_head pending;
153 struct list_head completion_pending;
154 struct list_head free_pool;
156 struct qed_chain chain;
158 /* allocated dma-able memory for spq entries (+ramrod data) */
160 struct qed_spq_entry *p_virt;
162 #define SPQ_RING_SIZE \
163 (CORE_SPQE_PAGE_SIZE_BYTES / sizeof(struct slow_path_element))
165 /* Bitmap for handling out-of-order completions */
166 DECLARE_BITMAP(p_comp_bitmap, SPQ_RING_SIZE);
170 u32 unlimited_pending_count;
180 * @brief qed_spq_post - Posts a Slow hwfn request to FW, or lacking that
181 * Pends it to the future list.
188 int qed_spq_post(struct qed_hwfn *p_hwfn,
189 struct qed_spq_entry *p_ent,
193 * @brief qed_spq_allocate - Alloocates & initializes the SPQ and EQ.
199 int qed_spq_alloc(struct qed_hwfn *p_hwfn);
202 * @brief qed_spq_setup - Reset the SPQ to its start state.
206 void qed_spq_setup(struct qed_hwfn *p_hwfn);
209 * @brief qed_spq_deallocate - Deallocates the given SPQ struct.
213 void qed_spq_free(struct qed_hwfn *p_hwfn);
216 * @brief qed_spq_get_entry - Obtain an entrry from the spq
227 qed_spq_get_entry(struct qed_hwfn *p_hwfn,
228 struct qed_spq_entry **pp_ent);
231 * @brief qed_spq_return_entry - Return an entry to spq free
237 void qed_spq_return_entry(struct qed_hwfn *p_hwfn,
238 struct qed_spq_entry *p_ent);
240 * @brief qed_eq_allocate - Allocates & initializes an EQ struct
243 * @param num_elem number of elements in the eq
245 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
247 struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn,
251 * @brief qed_eq_setup - Reset the SPQ to its start state.
256 void qed_eq_setup(struct qed_hwfn *p_hwfn,
257 struct qed_eq *p_eq);
260 * @brief qed_eq_deallocate - deallocates the given EQ struct.
265 void qed_eq_free(struct qed_hwfn *p_hwfn,
266 struct qed_eq *p_eq);
269 * @brief qed_eq_prod_update - update the FW with default EQ producer
274 void qed_eq_prod_update(struct qed_hwfn *p_hwfn,
278 * @brief qed_eq_completion - Completes currently pending EQ elements
285 int qed_eq_completion(struct qed_hwfn *p_hwfn,
289 * @brief qed_spq_completion - Completes a single event
292 * @param echo - echo value from cookie (used for determining completion)
293 * @param p_data - data from cookie (used in callback function if applicable)
297 int qed_spq_completion(struct qed_hwfn *p_hwfn,
300 union event_ring_data *p_data);
303 * @brief qed_spq_get_cid - Given p_hwfn, return cid for the hwfn's SPQ
307 * @return u32 - SPQ CID
309 u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn);
312 * @brief qed_consq_alloc - Allocates & initializes an ConsQ
317 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
319 struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn);
322 * @brief qed_consq_setup - Reset the ConsQ to its start
328 void qed_consq_setup(struct qed_hwfn *p_hwfn,
329 struct qed_consq *p_consq);
332 * @brief qed_consq_free - deallocates the given ConsQ struct.
337 void qed_consq_free(struct qed_hwfn *p_hwfn,
338 struct qed_consq *p_consq);
343 * @brief Slow-hwfn low-level commands (Ramrods) function definitions.
346 #define QED_SP_EQ_COMPLETION 0x01
347 #define QED_SP_CQE_COMPLETION 0x02
349 struct qed_sp_init_data {
353 /* Information regarding operation upon sending & completion */
354 enum spq_mode comp_mode;
355 struct qed_spq_comp_cb *p_comp_data;
358 int qed_sp_init_request(struct qed_hwfn *p_hwfn,
359 struct qed_spq_entry **pp_ent,
362 struct qed_sp_init_data *p_data);
365 * @brief qed_sp_pf_start - PF Function Start Ramrod
367 * This ramrod is sent to initialize a physical function (PF). It will
368 * configure the function related parameters and write its completion to the
369 * event ring specified in the parameters.
371 * Ramrods complete on the common event ring for the PF. This ring is
372 * allocated by the driver on host memory and its parameters are written
373 * to the internal RAM of the UStorm by the Function Start Ramrod.
378 * @param allow_npar_tx_switch
383 int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
384 struct qed_tunn_start_params *p_tunn,
385 enum qed_mf_mode mode, bool allow_npar_tx_switch);
388 * @brief qed_sp_pf_update - PF Function Update Ramrod
390 * This ramrod updates function-related parameters. Every parameter can be
391 * updated independently, according to configuration flags.
398 int qed_sp_pf_update(struct qed_hwfn *p_hwfn);
401 * @brief qed_sp_pf_stop - PF Function Stop Ramrod
403 * This ramrod is sent to close a Physical Function (PF). It is the last ramrod
404 * sent and the last completion written to the PFs Event Ring. This ramrod also
405 * deletes the context for the Slowhwfn connection on this PF.
407 * @note Not required for first packet.
414 int qed_sp_pf_stop(struct qed_hwfn *p_hwfn);
416 int qed_sp_pf_update_tunn_cfg(struct qed_hwfn *p_hwfn,
417 struct qed_tunn_update_params *p_tunn,
418 enum spq_mode comp_mode,
419 struct qed_spq_comp_cb *p_comp_data);
421 * @brief qed_sp_heartbeat_ramrod - Send empty Ramrod
428 int qed_sp_heartbeat_ramrod(struct qed_hwfn *p_hwfn);