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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 recv_marker_enabled;
 122         u8 xmit_marker_enabled; /* iWARP: enable inbound Read Resp. */
 123         u8 crc_enabled;
 124         u8 version;     /* 0 or 1 */
 125 };
 126
 127 struct iwch_qp_attributes {
 128         u32 scq;
 129         u32 rcq;
 130         u32 sq_num_entries;
 131         u32 rq_num_entries;
 132         u32 sq_max_sges;
 133         u32 sq_max_sges_rdma_write;
 134         u32 rq_max_sges;
 135         u32 state;
 136         u8 enable_rdma_read;
 137         u8 enable_rdma_write;   /* enable inbound Read Resp. */
 138         u8 enable_bind;
 139         u8 enable_mmid0_fastreg;        /* Enable STAG0 + Fast-register */
 140         /*
 141          * Next QP state. If specify the current state, only the
 142          * QP attributes will be modified.
 143          */
 144         u32 max_ord;
 145         u32 max_ird;
 146         u32 pd; /* IN */
 147         u32 next_state;
 148         char terminate_buffer[52];
 149         u32 terminate_msg_len;
 150         u8 is_terminate_local;
 151         struct iwch_mpa_attributes mpa_attr;    /* IN-OUT */
 152         struct iwch_ep *llp_stream_handle;
 153         char *stream_msg_buf;   /* Last stream msg. before Idle -> RTS */
 154         u32 stream_msg_buf_len; /* Only on Idle -> RTS */
 155 };
 156
 157 struct iwch_qp {
 158         struct ib_qp ibqp;
 159         struct iwch_dev *rhp;
 160         struct iwch_ep *ep;
 161         struct iwch_qp_attributes attr;
 162         struct t3_wq wq;
 163         spinlock_t lock;
 164         atomic_t refcnt;
 165         wait_queue_head_t wait;
 166         enum IWCH_QP_FLAGS flags;
 167         struct timer_list timer;
 168 };
 169
 170 static inline int qp_quiesced(struct iwch_qp *qhp)
 171 {
 172         return qhp->flags & QP_QUIESCED;
 173 }
 174
 175 static inline struct iwch_qp *to_iwch_qp(struct ib_qp *ibqp)
 176 {
 177         return container_of(ibqp, struct iwch_qp, ibqp);
 178 }
 179
 180 void iwch_qp_add_ref(struct ib_qp *qp);
 181 void iwch_qp_rem_ref(struct ib_qp *qp);
 182
 183 struct iwch_ucontext {
 184         struct ib_ucontext ibucontext;
 185         struct cxio_ucontext uctx;
 186         u32 key;
 187         spinlock_t mmap_lock;
 188         struct list_head mmaps;
 189 };
 190
 191 static inline struct iwch_ucontext *to_iwch_ucontext(struct ib_ucontext *c)
 192 {
 193         return container_of(c, struct iwch_ucontext, ibucontext);
 194 }
 195
 196 struct iwch_mm_entry {
 197         struct list_head entry;
 198         u64 addr;
 199         u32 key;
 200         unsigned len;
 201 };
 202
 203 static inline struct iwch_mm_entry *remove_mmap(struct iwch_ucontext *ucontext,
 204                                                 u32 key, unsigned len)
 205 {
 206         struct list_head *pos, *nxt;
 207         struct iwch_mm_entry *mm;
 208
 209         spin_lock(&ucontext->mmap_lock);
 210         list_for_each_safe(pos, nxt, &ucontext->mmaps) {
 211
 212                 mm = list_entry(pos, struct iwch_mm_entry, entry);
 213                 if (mm->key == key && mm->len == len) {
 214                         list_del_init(&mm->entry);
 215                         spin_unlock(&ucontext->mmap_lock);
 216                         PDBG("%s key 0x%x addr 0x%llx len %d\n", __FUNCTION__,
 217                              key, (unsigned long long) mm->addr, mm->len);
 218                         return mm;
 219                 }
 220         }
 221         spin_unlock(&ucontext->mmap_lock);
 222         return NULL;
 223 }
 224
 225 static inline void insert_mmap(struct iwch_ucontext *ucontext,
 226                                struct iwch_mm_entry *mm)
 227 {
 228         spin_lock(&ucontext->mmap_lock);
 229         PDBG("%s key 0x%x addr 0x%llx len %d\n", __FUNCTION__,
 230              mm->key, (unsigned long long) mm->addr, mm->len);
 231         list_add_tail(&mm->entry, &ucontext->mmaps);
 232         spin_unlock(&ucontext->mmap_lock);
 233 }
 234
 235 enum iwch_qp_attr_mask {
 236         IWCH_QP_ATTR_NEXT_STATE = 1 << 0,
 237         IWCH_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
 238         IWCH_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
 239         IWCH_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
 240         IWCH_QP_ATTR_MAX_ORD = 1 << 11,
 241         IWCH_QP_ATTR_MAX_IRD = 1 << 12,
 242         IWCH_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
 243         IWCH_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
 244         IWCH_QP_ATTR_MPA_ATTR = 1 << 24,
 245         IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
 246         IWCH_QP_ATTR_VALID_MODIFY = (IWCH_QP_ATTR_ENABLE_RDMA_READ |
 247                                      IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
 248                                      IWCH_QP_ATTR_MAX_ORD |
 249                                      IWCH_QP_ATTR_MAX_IRD |
 250                                      IWCH_QP_ATTR_LLP_STREAM_HANDLE |
 251                                      IWCH_QP_ATTR_STREAM_MSG_BUFFER |
 252                                      IWCH_QP_ATTR_MPA_ATTR |
 253                                      IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE)
 254 };
 255
 256 int iwch_modify_qp(struct iwch_dev *rhp,
 257                                 struct iwch_qp *qhp,
 258                                 enum iwch_qp_attr_mask mask,
 259                                 struct iwch_qp_attributes *attrs,
 260                                 int internal);
 261
 262 enum iwch_qp_state {
 263         IWCH_QP_STATE_IDLE,
 264         IWCH_QP_STATE_RTS,
 265         IWCH_QP_STATE_ERROR,
 266         IWCH_QP_STATE_TERMINATE,
 267         IWCH_QP_STATE_CLOSING,
 268         IWCH_QP_STATE_TOT
 269 };
 270
 271 static inline int iwch_convert_state(enum ib_qp_state ib_state)
 272 {
 273         switch (ib_state) {
 274         case IB_QPS_RESET:
 275         case IB_QPS_INIT:
 276                 return IWCH_QP_STATE_IDLE;
 277         case IB_QPS_RTS:
 278                 return IWCH_QP_STATE_RTS;
 279         case IB_QPS_SQD:
 280                 return IWCH_QP_STATE_CLOSING;
 281         case IB_QPS_SQE:
 282                 return IWCH_QP_STATE_TERMINATE;
 283         case IB_QPS_ERR:
 284                 return IWCH_QP_STATE_ERROR;
 285         default:
 286                 return -1;
 287         }
 288 }
 289
 290 static inline u32 iwch_ib_to_tpt_access(int acc)
 291 {
 292         return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
 293                (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0) |
 294                (acc & IB_ACCESS_LOCAL_WRITE ? TPT_LOCAL_WRITE : 0) |
 295                TPT_LOCAL_READ;
 296 }
 297
 298 static inline u32 iwch_ib_to_mwbind_access(int acc)
 299 {
 300         return (acc & IB_ACCESS_REMOTE_WRITE ? T3_MEM_ACCESS_REM_WRITE : 0) |
 301                (acc & IB_ACCESS_REMOTE_READ ? T3_MEM_ACCESS_REM_READ : 0) |
 302                (acc & IB_ACCESS_LOCAL_WRITE ? T3_MEM_ACCESS_LOCAL_WRITE : 0) |
 303                T3_MEM_ACCESS_LOCAL_READ;
 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 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 326                       struct ib_send_wr **bad_wr);
 327 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 328                       struct ib_recv_wr **bad_wr);
 329 int iwch_bind_mw(struct ib_qp *qp,
 330                              struct ib_mw *mw,
 331                              struct ib_mw_bind *mw_bind);
 332 int iwch_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 333 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg);
 334 int iwch_register_device(struct iwch_dev *dev);
 335 void iwch_unregister_device(struct iwch_dev *dev);
 336 int iwch_quiesce_qps(struct iwch_cq *chp);
 337 int iwch_resume_qps(struct iwch_cq *chp);
 338 void stop_read_rep_timer(struct iwch_qp *qhp);
 339 int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
 340                                         struct iwch_mr *mhp,
 341                                         int shift,
 342                                         __be64 *page_list);
 343 int iwch_reregister_mem(struct iwch_dev *rhp, struct iwch_pd *php,
 344                                         struct iwch_mr *mhp,
 345                                         int shift,
 346                                         __be64 *page_list,
 347                                         int npages);
 348 int build_phys_page_list(struct ib_phys_buf *buffer_list,
 349                                         int num_phys_buf,
 350                                         u64 *iova_start,
 351                                         u64 *total_size,
 352                                         int *npages,
 353                                         int *shift,
 354                                         __be64 **page_list);
 355
 356
 357 #define IWCH_NODE_DESC "cxgb3 Chelsio Communications"
 358
 359 #endif