drivers/net/ethernet/qlogic/qed/qed_sp.h

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015 QLogic Corporation
   3  *
   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
   6  * this source tree.
   7  */
   8
   9 #ifndef _QED_SP_H
  10 #define _QED_SP_H
  11
  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>
  18 #include "qed.h"
  19 #include "qed_hsi.h"
  20
  21 enum spq_mode {
  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 */
  25 };
  26
  27 struct qed_spq_comp_cb {
  28         void    (*function)(struct qed_hwfn *,
  29                             void *,
  30                             union event_ring_data *,
  31                             u8 fw_return_code);
  32         void    *cookie;
  33 };
  34
  35 /**
  36  * @brief qed_eth_cqe_completion - handles the completion of a
  37  *        ramrod on the cqe ring
  38  *
  39  * @param p_hwfn
  40  * @param cqe
  41  *
  42  * @return int
  43  */
  44 int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn,
  45                            struct eth_slow_path_rx_cqe *cqe);
  46
  47 /**
  48  *  @file
  49  *
  50  *  QED Slow-hwfn queue interface
  51  */
  52
  53 union ramrod_data {
  54         struct pf_start_ramrod_data pf_start;
  55         struct rx_queue_start_ramrod_data rx_queue_start;
  56         struct rx_queue_update_ramrod_data rx_queue_update;
  57         struct rx_queue_stop_ramrod_data rx_queue_stop;
  58         struct tx_queue_start_ramrod_data tx_queue_start;
  59         struct tx_queue_stop_ramrod_data tx_queue_stop;
  60         struct vport_start_ramrod_data vport_start;
  61         struct vport_stop_ramrod_data vport_stop;
  62         struct vport_update_ramrod_data vport_update;
  63         struct vport_filter_update_ramrod_data vport_filter_update;
  64 };
  65
  66 #define EQ_MAX_CREDIT   0xffffffff
  67
  68 enum spq_priority {
  69         QED_SPQ_PRIORITY_NORMAL,
  70         QED_SPQ_PRIORITY_HIGH,
  71 };
  72
  73 union qed_spq_req_comp {
  74         struct qed_spq_comp_cb  cb;
  75         u64                     *done_addr;
  76 };
  77
  78 struct qed_spq_comp_done {
  79         u64     done;
  80         u8      fw_return_code;
  81 };
  82
  83 struct qed_spq_entry {
  84         struct list_head                list;
  85
  86         u8                              flags;
  87
  88         /* HSI slow path element */
  89         struct slow_path_element        elem;
  90
  91         union ramrod_data               ramrod;
  92
  93         enum spq_priority               priority;
  94
  95         /* pending queue for this entry */
  96         struct list_head                *queue;
  97
  98         enum spq_mode                   comp_mode;
  99         struct qed_spq_comp_cb          comp_cb;
 100         struct qed_spq_comp_done        comp_done; /* SPQ_MODE_EBLOCK */
 101 };
 102
 103 struct qed_eq {
 104         struct qed_chain        chain;
 105         u8                      eq_sb_index;    /* index within the SB */
 106         __le16                  *p_fw_cons;     /* ptr to index value */
 107 };
 108
 109 struct qed_consq {
 110         struct qed_chain chain;
 111 };
 112
 113 struct qed_spq {
 114         spinlock_t              lock; /* SPQ lock */
 115
 116         struct list_head        unlimited_pending;
 117         struct list_head        pending;
 118         struct list_head        completion_pending;
 119         struct list_head        free_pool;
 120
 121         struct qed_chain        chain;
 122
 123         /* allocated dma-able memory for spq entries (+ramrod data) */
 124         dma_addr_t              p_phys;
 125         struct qed_spq_entry    *p_virt;
 126
 127 #define SPQ_RING_SIZE \
 128         (CORE_SPQE_PAGE_SIZE_BYTES / sizeof(struct slow_path_element))
 129
 130         /* Bitmap for handling out-of-order completions */
 131         DECLARE_BITMAP(p_comp_bitmap, SPQ_RING_SIZE);
 132         u8                      comp_bitmap_idx;
 133
 134         /* Statistics */
 135         u32                     unlimited_pending_count;
 136         u32                     normal_count;
 137         u32                     high_count;
 138         u32                     comp_sent_count;
 139         u32                     comp_count;
 140
 141         u32                     cid;
 142 };
 143
 144 /**
 145  * @brief qed_spq_post - Posts a Slow hwfn request to FW, or lacking that
 146  *        Pends it to the future list.
 147  *
 148  * @param p_hwfn
 149  * @param p_req
 150  *
 151  * @return int
 152  */
 153 int qed_spq_post(struct qed_hwfn *p_hwfn,
 154                  struct qed_spq_entry *p_ent,
 155                  u8 *fw_return_code);
 156
 157 /**
 158  * @brief qed_spq_allocate - Alloocates & initializes the SPQ and EQ.
 159  *
 160  * @param p_hwfn
 161  *
 162  * @return int
 163  */
 164 int qed_spq_alloc(struct qed_hwfn *p_hwfn);
 165
 166 /**
 167  * @brief qed_spq_setup - Reset the SPQ to its start state.
 168  *
 169  * @param p_hwfn
 170  */
 171 void qed_spq_setup(struct qed_hwfn *p_hwfn);
 172
 173 /**
 174  * @brief qed_spq_deallocate - Deallocates the given SPQ struct.
 175  *
 176  * @param p_hwfn
 177  */
 178 void qed_spq_free(struct qed_hwfn *p_hwfn);
 179
 180 /**
 181  * @brief qed_spq_get_entry - Obtain an entrry from the spq
 182  *        free pool list.
 183  *
 184  *
 185  *
 186  * @param p_hwfn
 187  * @param pp_ent
 188  *
 189  * @return int
 190  */
 191 int
 192 qed_spq_get_entry(struct qed_hwfn *p_hwfn,
 193                   struct qed_spq_entry **pp_ent);
 194
 195 /**
 196  * @brief qed_spq_return_entry - Return an entry to spq free
 197  *                                 pool list
 198  *
 199  * @param p_hwfn
 200  * @param p_ent
 201  */
 202 void qed_spq_return_entry(struct qed_hwfn *p_hwfn,
 203                           struct qed_spq_entry *p_ent);
 204 /**
 205  * @brief qed_eq_allocate - Allocates & initializes an EQ struct
 206  *
 207  * @param p_hwfn
 208  * @param num_elem number of elements in the eq
 209  *
 210  * @return struct qed_eq* - a newly allocated structure; NULL upon error.
 211  */
 212 struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn,
 213                             u16 num_elem);
 214
 215 /**
 216  * @brief qed_eq_setup - Reset the SPQ to its start state.
 217  *
 218  * @param p_hwfn
 219  * @param p_eq
 220  */
 221 void qed_eq_setup(struct qed_hwfn *p_hwfn,
 222                   struct qed_eq *p_eq);
 223
 224 /**
 225  * @brief qed_eq_deallocate - deallocates the given EQ struct.
 226  *
 227  * @param p_hwfn
 228  * @param p_eq
 229  */
 230 void qed_eq_free(struct qed_hwfn *p_hwfn,
 231                  struct qed_eq *p_eq);
 232
 233 /**
 234  * @brief qed_eq_prod_update - update the FW with default EQ producer
 235  *
 236  * @param p_hwfn
 237  * @param prod
 238  */
 239 void qed_eq_prod_update(struct qed_hwfn *p_hwfn,
 240                         u16 prod);
 241
 242 /**
 243  * @brief qed_eq_completion - Completes currently pending EQ elements
 244  *
 245  * @param p_hwfn
 246  * @param cookie
 247  *
 248  * @return int
 249  */
 250 int qed_eq_completion(struct qed_hwfn *p_hwfn,
 251                       void *cookie);
 252
 253 /**
 254  * @brief qed_spq_completion - Completes a single event
 255  *
 256  * @param p_hwfn
 257  * @param echo - echo value from cookie (used for determining completion)
 258  * @param p_data - data from cookie (used in callback function if applicable)
 259  *
 260  * @return int
 261  */
 262 int qed_spq_completion(struct qed_hwfn *p_hwfn,
 263                        __le16 echo,
 264                        u8 fw_return_code,
 265                        union event_ring_data *p_data);
 266
 267 /**
 268  * @brief qed_spq_get_cid - Given p_hwfn, return cid for the hwfn's SPQ
 269  *
 270  * @param p_hwfn
 271  *
 272  * @return u32 - SPQ CID
 273  */
 274 u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn);
 275
 276 /**
 277  * @brief qed_consq_alloc - Allocates & initializes an ConsQ
 278  *        struct
 279  *
 280  * @param p_hwfn
 281  *
 282  * @return struct qed_eq* - a newly allocated structure; NULL upon error.
 283  */
 284 struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn);
 285
 286 /**
 287  * @brief qed_consq_setup - Reset the ConsQ to its start
 288  *        state.
 289  *
 290  * @param p_hwfn
 291  * @param p_eq
 292  */
 293 void qed_consq_setup(struct qed_hwfn *p_hwfn,
 294                      struct qed_consq *p_consq);
 295
 296 /**
 297  * @brief qed_consq_free - deallocates the given ConsQ struct.
 298  *
 299  * @param p_hwfn
 300  * @param p_eq
 301  */
 302 void qed_consq_free(struct qed_hwfn *p_hwfn,
 303                     struct qed_consq *p_consq);
 304
 305 /**
 306  * @file
 307  *
 308  * @brief Slow-hwfn low-level commands (Ramrods) function definitions.
 309  */
 310
 311 #define QED_SP_EQ_COMPLETION  0x01
 312 #define QED_SP_CQE_COMPLETION 0x02
 313
 314 struct qed_sp_init_data {
 315         u32                     cid;
 316         u16                     opaque_fid;
 317
 318         /* Information regarding operation upon sending & completion */
 319         enum spq_mode           comp_mode;
 320         struct qed_spq_comp_cb *p_comp_data;
 321 };
 322
 323 int qed_sp_init_request(struct qed_hwfn *p_hwfn,
 324                         struct qed_spq_entry **pp_ent,
 325                         u8 cmd,
 326                         u8 protocol,
 327                         struct qed_sp_init_data *p_data);
 328
 329 /**
 330  * @brief qed_sp_pf_start - PF Function Start Ramrod
 331  *
 332  * This ramrod is sent to initialize a physical function (PF). It will
 333  * configure the function related parameters and write its completion to the
 334  * event ring specified in the parameters.
 335  *
 336  * Ramrods complete on the common event ring for the PF. This ring is
 337  * allocated by the driver on host memory and its parameters are written
 338  * to the internal RAM of the UStorm by the Function Start Ramrod.
 339  *
 340  * @param p_hwfn
 341  * @param mode
 342  *
 343  * @return int
 344  */
 345
 346 int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
 347                     enum qed_mf_mode mode);
 348
 349 /**
 350  * @brief qed_sp_pf_stop - PF Function Stop Ramrod
 351  *
 352  * This ramrod is sent to close a Physical Function (PF). It is the last ramrod
 353  * sent and the last completion written to the PFs Event Ring. This ramrod also
 354  * deletes the context for the Slowhwfn connection on this PF.
 355  *
 356  * @note Not required for first packet.
 357  *
 358  * @param p_hwfn
 359  *
 360  * @return int
 361  */
 362
 363 int qed_sp_pf_stop(struct qed_hwfn *p_hwfn);
 364
 365 #endif