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   1 /*
   2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #ifndef __IWCH_PROVIDER_H__
  33 #define __IWCH_PROVIDER_H__
  34
  35 #include <linux/list.h>
  36 #include <linux/spinlock.h>
  37 #include <rdma/ib_verbs.h>
  38 #include <asm/types.h>
  39 #include "t3cdev.h"
  40 #include "iwch.h"
  41 #include "cxio_wr.h"
  42 #include "cxio_hal.h"
  43
  44 struct iwch_pd {
  45         struct ib_pd ibpd;
  46         u32 pdid;
  47         struct iwch_dev *rhp;
  48 };
  49
  50 static inline struct iwch_pd *to_iwch_pd(struct ib_pd *ibpd)
  51 {
  52         return container_of(ibpd, struct iwch_pd, ibpd);
  53 }
  54
  55 struct tpt_attributes {
  56         u32 stag;
  57         u32 state:1;
  58         u32 type:2;
  59         u32 rsvd:1;
  60         enum tpt_mem_perm perms;
  61         u32 remote_invaliate_disable:1;
  62         u32 zbva:1;
  63         u32 mw_bind_enable:1;
  64         u32 page_size:5;
  65
  66         u32 pdid;
  67         u32 qpid;
  68         u32 pbl_addr;
  69         u32 len;
  70         u64 va_fbo;
  71         u32 pbl_size;
  72 };
  73
  74 struct iwch_mr {
  75         struct ib_mr ibmr;
  76         struct ib_umem *umem;
  77         struct iwch_dev *rhp;
  78         u64 kva;
  79         struct tpt_attributes attr;
  80 };
  81
  82 typedef struct iwch_mw iwch_mw_handle;
  83
  84 static inline struct iwch_mr *to_iwch_mr(struct ib_mr *ibmr)
  85 {
  86         return container_of(ibmr, struct iwch_mr, ibmr);
  87 }
  88
  89 struct iwch_mw {
  90         struct ib_mw ibmw;
  91         struct iwch_dev *rhp;
  92         u64 kva;
  93         struct tpt_attributes attr;
  94 };
  95
  96 static inline struct iwch_mw *to_iwch_mw(struct ib_mw *ibmw)
  97 {
  98         return container_of(ibmw, struct iwch_mw, ibmw);
  99 }
 100
 101 struct iwch_cq {
 102         struct ib_cq ibcq;
 103         struct iwch_dev *rhp;
 104         struct t3_cq cq;
 105         spinlock_t lock;
 106         atomic_t refcnt;
 107         wait_queue_head_t wait;
 108         u32 __user *user_rptr_addr;
 109 };
 110
 111 static inline struct iwch_cq *to_iwch_cq(struct ib_cq *ibcq)
 112 {
 113         return container_of(ibcq, struct iwch_cq, ibcq);
 114 }
 115
 116 enum IWCH_QP_FLAGS {
 117         QP_QUIESCED = 0x01
 118 };
 119
 120 struct iwch_mpa_attributes {
 121         u8 initiator;
 122         u8 recv_marker_enabled;
 123         u8 xmit_marker_enabled; /* iWARP: enable inbound Read Resp. */
 124         u8 crc_enabled;
 125         u8 version;     /* 0 or 1 */
 126 };
 127
 128 struct iwch_qp_attributes {
 129         u32 scq;
 130         u32 rcq;
 131         u32 sq_num_entries;
 132         u32 rq_num_entries;
 133         u32 sq_max_sges;
 134         u32 sq_max_sges_rdma_write;
 135         u32 rq_max_sges;
 136         u32 state;
 137         u8 enable_rdma_read;
 138         u8 enable_rdma_write;   /* enable inbound Read Resp. */
 139         u8 enable_bind;
 140         u8 enable_mmid0_fastreg;        /* Enable STAG0 + Fast-register */
 141         /*
 142          * Next QP state. If specify the current state, only the
 143          * QP attributes will be modified.
 144          */
 145         u32 max_ord;
 146         u32 max_ird;
 147         u32 pd; /* IN */
 148         u32 next_state;
 149         char terminate_buffer[52];
 150         u32 terminate_msg_len;
 151         u8 is_terminate_local;
 152         struct iwch_mpa_attributes mpa_attr;    /* IN-OUT */
 153         struct iwch_ep *llp_stream_handle;
 154         char *stream_msg_buf;   /* Last stream msg. before Idle -> RTS */
 155         u32 stream_msg_buf_len; /* Only on Idle -> RTS */
 156 };
 157
 158 struct iwch_qp {
 159         struct ib_qp ibqp;
 160         struct iwch_dev *rhp;
 161         struct iwch_ep *ep;
 162         struct iwch_qp_attributes attr;
 163         struct t3_wq wq;
 164         spinlock_t lock;
 165         atomic_t refcnt;
 166         wait_queue_head_t wait;
 167         enum IWCH_QP_FLAGS flags;
 168         struct timer_list timer;
 169 };
 170
 171 static inline int qp_quiesced(struct iwch_qp *qhp)
 172 {
 173         return qhp->flags & QP_QUIESCED;
 174 }
 175
 176 static inline struct iwch_qp *to_iwch_qp(struct ib_qp *ibqp)
 177 {
 178         return container_of(ibqp, struct iwch_qp, ibqp);
 179 }
 180
 181 void iwch_qp_add_ref(struct ib_qp *qp);
 182 void iwch_qp_rem_ref(struct ib_qp *qp);
 183
 184 struct iwch_ucontext {
 185         struct ib_ucontext ibucontext;
 186         struct cxio_ucontext uctx;
 187         u32 key;
 188         spinlock_t mmap_lock;
 189         struct list_head mmaps;
 190 };
 191
 192 static inline struct iwch_ucontext *to_iwch_ucontext(struct ib_ucontext *c)
 193 {
 194         return container_of(c, struct iwch_ucontext, ibucontext);
 195 }
 196
 197 struct iwch_mm_entry {
 198         struct list_head entry;
 199         u64 addr;
 200         u32 key;
 201         unsigned len;
 202 };
 203
 204 static inline struct iwch_mm_entry *remove_mmap(struct iwch_ucontext *ucontext,
 205                                                 u32 key, unsigned len)
 206 {
 207         struct list_head *pos, *nxt;
 208         struct iwch_mm_entry *mm;
 209
 210         spin_lock(&ucontext->mmap_lock);
 211         list_for_each_safe(pos, nxt, &ucontext->mmaps) {
 212
 213                 mm = list_entry(pos, struct iwch_mm_entry, entry);
 214                 if (mm->key == key && mm->len == len) {
 215                         list_del_init(&mm->entry);
 216                         spin_unlock(&ucontext->mmap_lock);
 217                         PDBG("%s key 0x%x addr 0x%llx len %d\n", __func__,
 218                              key, (unsigned long long) mm->addr, mm->len);
 219                         return mm;
 220                 }
 221         }
 222         spin_unlock(&ucontext->mmap_lock);
 223         return NULL;
 224 }
 225
 226 static inline void insert_mmap(struct iwch_ucontext *ucontext,
 227                                struct iwch_mm_entry *mm)
 228 {
 229         spin_lock(&ucontext->mmap_lock);
 230         PDBG("%s key 0x%x addr 0x%llx len %d\n", __func__,
 231              mm->key, (unsigned long long) mm->addr, mm->len);
 232         list_add_tail(&mm->entry, &ucontext->mmaps);
 233         spin_unlock(&ucontext->mmap_lock);
 234 }
 235
 236 enum iwch_qp_attr_mask {
 237         IWCH_QP_ATTR_NEXT_STATE = 1 << 0,
 238         IWCH_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
 239         IWCH_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
 240         IWCH_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
 241         IWCH_QP_ATTR_MAX_ORD = 1 << 11,
 242         IWCH_QP_ATTR_MAX_IRD = 1 << 12,
 243         IWCH_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
 244         IWCH_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
 245         IWCH_QP_ATTR_MPA_ATTR = 1 << 24,
 246         IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
 247         IWCH_QP_ATTR_VALID_MODIFY = (IWCH_QP_ATTR_ENABLE_RDMA_READ |
 248                                      IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
 249                                      IWCH_QP_ATTR_MAX_ORD |
 250                                      IWCH_QP_ATTR_MAX_IRD |
 251                                      IWCH_QP_ATTR_LLP_STREAM_HANDLE |
 252                                      IWCH_QP_ATTR_STREAM_MSG_BUFFER |
 253                                      IWCH_QP_ATTR_MPA_ATTR |
 254                                      IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE)
 255 };
 256
 257 int iwch_modify_qp(struct iwch_dev *rhp,
 258                                 struct iwch_qp *qhp,
 259                                 enum iwch_qp_attr_mask mask,
 260                                 struct iwch_qp_attributes *attrs,
 261                                 int internal);
 262
 263 enum iwch_qp_state {
 264         IWCH_QP_STATE_IDLE,
 265         IWCH_QP_STATE_RTS,
 266         IWCH_QP_STATE_ERROR,
 267         IWCH_QP_STATE_TERMINATE,
 268         IWCH_QP_STATE_CLOSING,
 269         IWCH_QP_STATE_TOT
 270 };
 271
 272 static inline int iwch_convert_state(enum ib_qp_state ib_state)
 273 {
 274         switch (ib_state) {
 275         case IB_QPS_RESET:
 276         case IB_QPS_INIT:
 277                 return IWCH_QP_STATE_IDLE;
 278         case IB_QPS_RTS:
 279                 return IWCH_QP_STATE_RTS;
 280         case IB_QPS_SQD:
 281                 return IWCH_QP_STATE_CLOSING;
 282         case IB_QPS_SQE:
 283                 return IWCH_QP_STATE_TERMINATE;
 284         case IB_QPS_ERR:
 285                 return IWCH_QP_STATE_ERROR;
 286         default:
 287                 return -1;
 288         }
 289 }
 290
 291 static inline u32 iwch_ib_to_tpt_access(int acc)
 292 {
 293         return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
 294                (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0) |
 295                (acc & IB_ACCESS_LOCAL_WRITE ? TPT_LOCAL_WRITE : 0) |
 296                (acc & IB_ACCESS_MW_BIND ? TPT_MW_BIND : 0) |
 297                TPT_LOCAL_READ;
 298 }
 299
 300 static inline u32 iwch_ib_to_tpt_bind_access(int acc)
 301 {
 302         return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
 303                (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0);
 304 }
 305
 306 enum iwch_mmid_state {
 307         IWCH_STAG_STATE_VALID,
 308         IWCH_STAG_STATE_INVALID
 309 };
 310
 311 enum iwch_qp_query_flags {
 312         IWCH_QP_QUERY_CONTEXT_NONE = 0x0,       /* No ctx; Only attrs */
 313         IWCH_QP_QUERY_CONTEXT_GET = 0x1,        /* Get ctx + attrs */
 314         IWCH_QP_QUERY_CONTEXT_SUSPEND = 0x2,    /* Not Supported */
 315
 316         /*
 317          * Quiesce QP context; Consumer
 318          * will NOT replay outstanding WR
 319          */
 320         IWCH_QP_QUERY_CONTEXT_QUIESCE = 0x4,
 321         IWCH_QP_QUERY_CONTEXT_REMOVE = 0x8,
 322         IWCH_QP_QUERY_TEST_USERWRITE = 0x32     /* Test special */
 323 };
 324
 325 u16 iwch_rqes_posted(struct iwch_qp *qhp);
 326 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 327                       struct ib_send_wr **bad_wr);
 328 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 329                       struct ib_recv_wr **bad_wr);
 330 int iwch_bind_mw(struct ib_qp *qp,
 331                              struct ib_mw *mw,
 332                              struct ib_mw_bind *mw_bind);
 333 int iwch_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 334 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg);
 335 int iwch_post_zb_read(struct iwch_qp *qhp);
 336 int iwch_register_device(struct iwch_dev *dev);
 337 void iwch_unregister_device(struct iwch_dev *dev);
 338 int iwch_quiesce_qps(struct iwch_cq *chp);
 339 int iwch_resume_qps(struct iwch_cq *chp);
 340 void stop_read_rep_timer(struct iwch_qp *qhp);
 341 int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
 342                       struct iwch_mr *mhp, int shift);
 343 int iwch_reregister_mem(struct iwch_dev *rhp, struct iwch_pd *php,
 344                                         struct iwch_mr *mhp,
 345                                         int shift,
 346                                         int npages);
 347 int iwch_alloc_pbl(struct iwch_mr *mhp, int npages);
 348 void iwch_free_pbl(struct iwch_mr *mhp);
 349 int iwch_write_pbl(struct iwch_mr *mhp, __be64 *pages, int npages, int offset);
 350 int build_phys_page_list(struct ib_phys_buf *buffer_list,
 351                                         int num_phys_buf,
 352                                         u64 *iova_start,
 353                                         u64 *total_size,
 354                                         int *npages,
 355                                         int *shift,
 356                                         __be64 **page_list);
 357
 358
 359 #define IWCH_NODE_DESC "cxgb3 Chelsio Communications"
 360
 361 #endif