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_destroy_cq_ramrod_data rdma_destroy_cq;
84 struct rdma_srq_create_ramrod_data rdma_create_srq;
85 struct rdma_srq_destroy_ramrod_data rdma_destroy_srq;
86 struct rdma_srq_modify_ramrod_data rdma_modify_srq;
87 struct roce_init_func_ramrod_data roce_init_func;
89 struct iscsi_slow_path_hdr iscsi_empty;
90 struct iscsi_init_ramrod_params iscsi_init;
91 struct iscsi_spe_func_dstry iscsi_destroy;
92 struct iscsi_spe_conn_offload iscsi_conn_offload;
93 struct iscsi_conn_update_ramrod_params iscsi_conn_update;
94 struct iscsi_spe_conn_termination iscsi_conn_terminate;
96 struct vf_start_ramrod_data vf_start;
97 struct vf_stop_ramrod_data vf_stop;
100 #define EQ_MAX_CREDIT 0xffffffff
103 QED_SPQ_PRIORITY_NORMAL,
104 QED_SPQ_PRIORITY_HIGH,
107 union qed_spq_req_comp {
108 struct qed_spq_comp_cb cb;
112 struct qed_spq_comp_done {
117 struct qed_spq_entry {
118 struct list_head list;
122 /* HSI slow path element */
123 struct slow_path_element elem;
125 union ramrod_data ramrod;
127 enum spq_priority priority;
129 /* pending queue for this entry */
130 struct list_head *queue;
132 enum spq_mode comp_mode;
133 struct qed_spq_comp_cb comp_cb;
134 struct qed_spq_comp_done comp_done; /* SPQ_MODE_EBLOCK */
136 /* Posted entry for unlimited list entry in EBLOCK mode */
137 struct qed_spq_entry *post_ent;
141 struct qed_chain chain;
142 u8 eq_sb_index; /* index within the SB */
143 __le16 *p_fw_cons; /* ptr to index value */
147 struct qed_chain chain;
151 spinlock_t lock; /* SPQ lock */
153 struct list_head unlimited_pending;
154 struct list_head pending;
155 struct list_head completion_pending;
156 struct list_head free_pool;
158 struct qed_chain chain;
160 /* allocated dma-able memory for spq entries (+ramrod data) */
162 struct qed_spq_entry *p_virt;
164 #define SPQ_RING_SIZE \
165 (CORE_SPQE_PAGE_SIZE_BYTES / sizeof(struct slow_path_element))
167 /* Bitmap for handling out-of-order completions */
168 DECLARE_BITMAP(p_comp_bitmap, SPQ_RING_SIZE);
172 u32 unlimited_pending_count;
182 * @brief qed_spq_post - Posts a Slow hwfn request to FW, or lacking that
183 * Pends it to the future list.
190 int qed_spq_post(struct qed_hwfn *p_hwfn,
191 struct qed_spq_entry *p_ent,
195 * @brief qed_spq_allocate - Alloocates & initializes the SPQ and EQ.
201 int qed_spq_alloc(struct qed_hwfn *p_hwfn);
204 * @brief qed_spq_setup - Reset the SPQ to its start state.
208 void qed_spq_setup(struct qed_hwfn *p_hwfn);
211 * @brief qed_spq_deallocate - Deallocates the given SPQ struct.
215 void qed_spq_free(struct qed_hwfn *p_hwfn);
218 * @brief qed_spq_get_entry - Obtain an entrry from the spq
229 qed_spq_get_entry(struct qed_hwfn *p_hwfn,
230 struct qed_spq_entry **pp_ent);
233 * @brief qed_spq_return_entry - Return an entry to spq free
239 void qed_spq_return_entry(struct qed_hwfn *p_hwfn,
240 struct qed_spq_entry *p_ent);
242 * @brief qed_eq_allocate - Allocates & initializes an EQ struct
245 * @param num_elem number of elements in the eq
247 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
249 struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn,
253 * @brief qed_eq_setup - Reset the SPQ to its start state.
258 void qed_eq_setup(struct qed_hwfn *p_hwfn,
259 struct qed_eq *p_eq);
262 * @brief qed_eq_deallocate - deallocates the given EQ struct.
267 void qed_eq_free(struct qed_hwfn *p_hwfn,
268 struct qed_eq *p_eq);
271 * @brief qed_eq_prod_update - update the FW with default EQ producer
276 void qed_eq_prod_update(struct qed_hwfn *p_hwfn,
280 * @brief qed_eq_completion - Completes currently pending EQ elements
287 int qed_eq_completion(struct qed_hwfn *p_hwfn,
291 * @brief qed_spq_completion - Completes a single event
294 * @param echo - echo value from cookie (used for determining completion)
295 * @param p_data - data from cookie (used in callback function if applicable)
299 int qed_spq_completion(struct qed_hwfn *p_hwfn,
302 union event_ring_data *p_data);
305 * @brief qed_spq_get_cid - Given p_hwfn, return cid for the hwfn's SPQ
309 * @return u32 - SPQ CID
311 u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn);
314 * @brief qed_consq_alloc - Allocates & initializes an ConsQ
319 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
321 struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn);
324 * @brief qed_consq_setup - Reset the ConsQ to its start
330 void qed_consq_setup(struct qed_hwfn *p_hwfn,
331 struct qed_consq *p_consq);
334 * @brief qed_consq_free - deallocates the given ConsQ struct.
339 void qed_consq_free(struct qed_hwfn *p_hwfn,
340 struct qed_consq *p_consq);
345 * @brief Slow-hwfn low-level commands (Ramrods) function definitions.
348 #define QED_SP_EQ_COMPLETION 0x01
349 #define QED_SP_CQE_COMPLETION 0x02
351 struct qed_sp_init_data {
355 /* Information regarding operation upon sending & completion */
356 enum spq_mode comp_mode;
357 struct qed_spq_comp_cb *p_comp_data;
360 int qed_sp_init_request(struct qed_hwfn *p_hwfn,
361 struct qed_spq_entry **pp_ent,
364 struct qed_sp_init_data *p_data);
367 * @brief qed_sp_pf_start - PF Function Start Ramrod
369 * This ramrod is sent to initialize a physical function (PF). It will
370 * configure the function related parameters and write its completion to the
371 * event ring specified in the parameters.
373 * Ramrods complete on the common event ring for the PF. This ring is
374 * allocated by the driver on host memory and its parameters are written
375 * to the internal RAM of the UStorm by the Function Start Ramrod.
380 * @param allow_npar_tx_switch
385 int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
386 struct qed_tunn_start_params *p_tunn,
387 enum qed_mf_mode mode, bool allow_npar_tx_switch);
390 * @brief qed_sp_pf_update - PF Function Update Ramrod
392 * This ramrod updates function-related parameters. Every parameter can be
393 * updated independently, according to configuration flags.
400 int qed_sp_pf_update(struct qed_hwfn *p_hwfn);
403 * @brief qed_sp_pf_stop - PF Function Stop Ramrod
405 * This ramrod is sent to close a Physical Function (PF). It is the last ramrod
406 * sent and the last completion written to the PFs Event Ring. This ramrod also
407 * deletes the context for the Slowhwfn connection on this PF.
409 * @note Not required for first packet.
416 int qed_sp_pf_stop(struct qed_hwfn *p_hwfn);
418 int qed_sp_pf_update_tunn_cfg(struct qed_hwfn *p_hwfn,
419 struct qed_tunn_update_params *p_tunn,
420 enum spq_mode comp_mode,
421 struct qed_spq_comp_cb *p_comp_data);
423 * @brief qed_sp_heartbeat_ramrod - Send empty Ramrod
430 int qed_sp_heartbeat_ramrod(struct qed_hwfn *p_hwfn);