drivers/infiniband/hw/cxgb3/iwch_provider.h

   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 iwch_dev *rhp;
  77         u64 kva;
  78         struct tpt_attributes attr;
  79 };
  80
  81 typedef struct iwch_mw iwch_mw_handle;
  82
  83 static inline struct iwch_mr *to_iwch_mr(struct ib_mr *ibmr)
  84 {
  85         return container_of(ibmr, struct iwch_mr, ibmr);
  86 }
  87
  88 struct iwch_mw {
  89         struct ib_mw ibmw;
  90         struct iwch_dev *rhp;
  91         u64 kva;
  92         struct tpt_attributes attr;
  93 };
  94
  95 static inline struct iwch_mw *to_iwch_mw(struct ib_mw *ibmw)
  96 {
  97         return container_of(ibmw, struct iwch_mw, ibmw);
  98 }
  99
 100 struct iwch_cq {
 101         struct ib_cq ibcq;
 102         struct iwch_dev *rhp;
 103         struct t3_cq cq;
 104         spinlock_t lock;
 105         atomic_t refcnt;
 106         wait_queue_head_t wait;
 107         u32 __user *user_rptr_addr;
 108 };
 109
 110 static inline struct iwch_cq *to_iwch_cq(struct ib_cq *ibcq)
 111 {
 112         return container_of(ibcq, struct iwch_cq, ibcq);
 113 }
 114
 115 enum IWCH_QP_FLAGS {
 116         QP_QUIESCED = 0x01
 117 };
 118
 119 struct iwch_mpa_attributes {
 120         u8 recv_marker_enabled;
 121         u8 xmit_marker_enabled; /* iWARP: enable inbound Read Resp. */
 122         u8 crc_enabled;
 123         u8 version;     /* 0 or 1 */
 124 };
 125
 126 struct iwch_qp_attributes {
 127         u32 scq;
 128         u32 rcq;
 129         u32 sq_num_entries;
 130         u32 rq_num_entries;
 131         u32 sq_max_sges;
 132         u32 sq_max_sges_rdma_write;
 133         u32 rq_max_sges;
 134         u32 state;
 135         u8 enable_rdma_read;
 136         u8 enable_rdma_write;   /* enable inbound Read Resp. */
 137         u8 enable_bind;
 138         u8 enable_mmid0_fastreg;        /* Enable STAG0 + Fast-register */
 139         /*
 140          * Next QP state. If specify the current state, only the
 141          * QP attributes will be modified.
 142          */
 143         u32 max_ord;
 144         u32 max_ird;
 145         u32 pd; /* IN */
 146         u32 next_state;
 147         char terminate_buffer[52];
 148         u32 terminate_msg_len;
 149         u8 is_terminate_local;
 150         struct iwch_mpa_attributes mpa_attr;    /* IN-OUT */
 151         struct iwch_ep *llp_stream_handle;
 152         char *stream_msg_buf;   /* Last stream msg. before Idle -> RTS */
 153         u32 stream_msg_buf_len; /* Only on Idle -> RTS */
 154 };
 155
 156 struct iwch_qp {
 157         struct ib_qp ibqp;
 158         struct iwch_dev *rhp;
 159         struct iwch_ep *ep;
 160         struct iwch_qp_attributes attr;
 161         struct t3_wq wq;
 162         spinlock_t lock;
 163         atomic_t refcnt;
 164         wait_queue_head_t wait;
 165         enum IWCH_QP_FLAGS flags;
 166         struct timer_list timer;
 167 };
 168
 169 static inline int qp_quiesced(struct iwch_qp *qhp)
 170 {
 171         return qhp->flags & QP_QUIESCED;
 172 }
 173
 174 static inline struct iwch_qp *to_iwch_qp(struct ib_qp *ibqp)
 175 {
 176         return container_of(ibqp, struct iwch_qp, ibqp);
 177 }
 178
 179 void iwch_qp_add_ref(struct ib_qp *qp);
 180 void iwch_qp_rem_ref(struct ib_qp *qp);
 181
 182 struct iwch_ucontext {
 183         struct ib_ucontext ibucontext;
 184         struct cxio_ucontext uctx;
 185         u32 key;
 186         spinlock_t mmap_lock;
 187         struct list_head mmaps;
 188 };
 189
 190 static inline struct iwch_ucontext *to_iwch_ucontext(struct ib_ucontext *c)
 191 {
 192         return container_of(c, struct iwch_ucontext, ibucontext);
 193 }
 194
 195 struct iwch_mm_entry {
 196         struct list_head entry;
 197         u64 addr;
 198         u32 key;
 199         unsigned len;
 200 };
 201
 202 static inline struct iwch_mm_entry *remove_mmap(struct iwch_ucontext *ucontext,
 203                                                 u32 key, unsigned len)
 204 {
 205         struct list_head *pos, *nxt;
 206         struct iwch_mm_entry *mm;
 207
 208         spin_lock(&ucontext->mmap_lock);
 209         list_for_each_safe(pos, nxt, &ucontext->mmaps) {
 210
 211                 mm = list_entry(pos, struct iwch_mm_entry, entry);
 212                 if (mm->key == key && mm->len == len) {
 213                         list_del_init(&mm->entry);
 214                         spin_unlock(&ucontext->mmap_lock);
 215                         PDBG("%s key 0x%x addr 0x%llx len %d\n", __FUNCTION__,
 216                              key, (unsigned long long) mm->addr, mm->len);
 217                         return mm;
 218                 }
 219         }
 220         spin_unlock(&ucontext->mmap_lock);
 221         return NULL;
 222 }
 223
 224 static inline void insert_mmap(struct iwch_ucontext *ucontext,
 225                                struct iwch_mm_entry *mm)
 226 {
 227         spin_lock(&ucontext->mmap_lock);
 228         PDBG("%s key 0x%x addr 0x%llx len %d\n", __FUNCTION__,
 229              mm->key, (unsigned long long) mm->addr, mm->len);
 230         list_add_tail(&mm->entry, &ucontext->mmaps);
 231         spin_unlock(&ucontext->mmap_lock);
 232 }
 233
 234 enum iwch_qp_attr_mask {
 235         IWCH_QP_ATTR_NEXT_STATE = 1 << 0,
 236         IWCH_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
 237         IWCH_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
 238         IWCH_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
 239         IWCH_QP_ATTR_MAX_ORD = 1 << 11,
 240         IWCH_QP_ATTR_MAX_IRD = 1 << 12,
 241         IWCH_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
 242         IWCH_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
 243         IWCH_QP_ATTR_MPA_ATTR = 1 << 24,
 244         IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
 245         IWCH_QP_ATTR_VALID_MODIFY = (IWCH_QP_ATTR_ENABLE_RDMA_READ |
 246                                      IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
 247                                      IWCH_QP_ATTR_MAX_ORD |
 248                                      IWCH_QP_ATTR_MAX_IRD |
 249                                      IWCH_QP_ATTR_LLP_STREAM_HANDLE |
 250                                      IWCH_QP_ATTR_STREAM_MSG_BUFFER |
 251                                      IWCH_QP_ATTR_MPA_ATTR |
 252                                      IWCH_QP_ATTR_QP_CONTEXT_ACTIVATE)
 253 };
 254
 255 int iwch_modify_qp(struct iwch_dev *rhp,
 256                                 struct iwch_qp *qhp,
 257                                 enum iwch_qp_attr_mask mask,
 258                                 struct iwch_qp_attributes *attrs,
 259                                 int internal);
 260
 261 enum iwch_qp_state {
 262         IWCH_QP_STATE_IDLE,
 263         IWCH_QP_STATE_RTS,
 264         IWCH_QP_STATE_ERROR,
 265         IWCH_QP_STATE_TERMINATE,
 266         IWCH_QP_STATE_CLOSING,
 267         IWCH_QP_STATE_TOT
 268 };
 269
 270 static inline int iwch_convert_state(enum ib_qp_state ib_state)
 271 {
 272         switch (ib_state) {
 273         case IB_QPS_RESET:
 274         case IB_QPS_INIT:
 275                 return IWCH_QP_STATE_IDLE;
 276         case IB_QPS_RTS:
 277                 return IWCH_QP_STATE_RTS;
 278         case IB_QPS_SQD:
 279                 return IWCH_QP_STATE_CLOSING;
 280         case IB_QPS_SQE:
 281                 return IWCH_QP_STATE_TERMINATE;
 282         case IB_QPS_ERR:
 283                 return IWCH_QP_STATE_ERROR;
 284         default:
 285                 return -1;
 286         }
 287 }
 288
 289 static inline u32 iwch_ib_to_tpt_access(int acc)
 290 {
 291         return (acc & IB_ACCESS_REMOTE_WRITE ? TPT_REMOTE_WRITE : 0) |
 292                (acc & IB_ACCESS_REMOTE_READ ? TPT_REMOTE_READ : 0) |
 293                (acc & IB_ACCESS_LOCAL_WRITE ? TPT_LOCAL_WRITE : 0) |
 294                TPT_LOCAL_READ;
 295 }
 296
 297 static inline u32 iwch_ib_to_mwbind_access(int acc)
 298 {
 299         return (acc & IB_ACCESS_REMOTE_WRITE ? T3_MEM_ACCESS_REM_WRITE : 0) |
 300                (acc & IB_ACCESS_REMOTE_READ ? T3_MEM_ACCESS_REM_READ : 0) |
 301                (acc & IB_ACCESS_LOCAL_WRITE ? T3_MEM_ACCESS_LOCAL_WRITE : 0) |
 302                T3_MEM_ACCESS_LOCAL_READ;
 303 }
 304
 305 enum iwch_mmid_state {
 306         IWCH_STAG_STATE_VALID,
 307         IWCH_STAG_STATE_INVALID
 308 };
 309
 310 enum iwch_qp_query_flags {
 311         IWCH_QP_QUERY_CONTEXT_NONE = 0x0,       /* No ctx; Only attrs */
 312         IWCH_QP_QUERY_CONTEXT_GET = 0x1,        /* Get ctx + attrs */
 313         IWCH_QP_QUERY_CONTEXT_SUSPEND = 0x2,    /* Not Supported */
 314
 315         /*
 316          * Quiesce QP context; Consumer
 317          * will NOT replay outstanding WR
 318          */
 319         IWCH_QP_QUERY_CONTEXT_QUIESCE = 0x4,
 320         IWCH_QP_QUERY_CONTEXT_REMOVE = 0x8,
 321         IWCH_QP_QUERY_TEST_USERWRITE = 0x32     /* Test special */
 322 };
 323
 324 int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 325                       struct ib_send_wr **bad_wr);
 326 int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 327                       struct ib_recv_wr **bad_wr);
 328 int iwch_bind_mw(struct ib_qp *qp,
 329                              struct ib_mw *mw,
 330                              struct ib_mw_bind *mw_bind);
 331 int iwch_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 332 int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg);
 333 int iwch_register_device(struct iwch_dev *dev);
 334 void iwch_unregister_device(struct iwch_dev *dev);
 335 int iwch_quiesce_qps(struct iwch_cq *chp);
 336 int iwch_resume_qps(struct iwch_cq *chp);
 337 void stop_read_rep_timer(struct iwch_qp *qhp);
 338 int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
 339                                         struct iwch_mr *mhp,
 340                                         int shift,
 341                                         __be64 *page_list);
 342 int iwch_reregister_mem(struct iwch_dev *rhp, struct iwch_pd *php,
 343                                         struct iwch_mr *mhp,
 344                                         int shift,
 345                                         __be64 *page_list,
 346                                         int npages);
 347 int build_phys_page_list(struct ib_phys_buf *buffer_list,
 348                                         int num_phys_buf,
 349                                         u64 *iova_start,
 350                                         u64 *total_size,
 351                                         int *npages,
 352                                         int *shift,
 353                                         __be64 **page_list);
 354
 355
 356 #define IWCH_NODE_DESC "cxgb3 Chelsio Communications"
 357
 358 #endif