drivers/infiniband/hw/cxgb3/iwch.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_H__
  33 #define __IWCH_H__
  34
  35 #include <linux/mutex.h>
  36 #include <linux/list.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/idr.h>
  39
  40 #include <rdma/ib_verbs.h>
  41
  42 #include "cxio_hal.h"
  43 #include "cxgb3_offload.h"
  44
  45 struct iwch_pd;
  46 struct iwch_cq;
  47 struct iwch_qp;
  48 struct iwch_mr;
  49
  50 struct iwch_rnic_attributes {
  51         u32 max_qps;
  52         u32 max_wrs;                            /* Max for any SQ/RQ */
  53         u32 max_sge_per_wr;
  54         u32 max_sge_per_rdma_write_wr;  /* for RDMA Write WR */
  55         u32 max_cqs;
  56         u32 max_cqes_per_cq;
  57         u32 max_mem_regs;
  58         u32 max_phys_buf_entries;               /* for phys buf list */
  59         u32 max_pds;
  60
  61         /*
  62          * The memory page sizes supported by this RNIC.
  63          * Bit position i in bitmap indicates page of
  64          * size (4k)^i.  Phys block list mode unsupported.
  65          */
  66         u32 mem_pgsizes_bitmask;
  67         u64 max_mr_size;
  68         u8 can_resize_wq;
  69
  70         /*
  71          * The maximum number of RDMA Reads that can be outstanding
  72          * per QP with this RNIC as the target.
  73          */
  74         u32 max_rdma_reads_per_qp;
  75
  76         /*
  77          * The maximum number of resources used for RDMA Reads
  78          * by this RNIC with this RNIC as the target.
  79          */
  80         u32 max_rdma_read_resources;
  81
  82         /*
  83          * The max depth per QP for initiation of RDMA Read
  84          * by this RNIC.
  85          */
  86         u32 max_rdma_read_qp_depth;
  87
  88         /*
  89          * The maximum depth for initiation of RDMA Read
  90          * operations by this RNIC on all QPs
  91          */
  92         u32 max_rdma_read_depth;
  93         u8 rq_overflow_handled;
  94         u32 can_modify_ird;
  95         u32 can_modify_ord;
  96         u32 max_mem_windows;
  97         u32 stag0_value;
  98         u8 zbva_support;
  99         u8 local_invalidate_fence;
 100         u32 cq_overflow_detection;
 101 };
 102
 103 struct iwch_dev {
 104         struct ib_device ibdev;
 105         struct cxio_rdev rdev;
 106         u32 device_cap_flags;
 107         struct iwch_rnic_attributes attr;
 108         struct idr cqidr;
 109         struct idr qpidr;
 110         struct idr mmidr;
 111         spinlock_t lock;
 112         struct list_head entry;
 113 };
 114
 115 static inline struct iwch_dev *to_iwch_dev(struct ib_device *ibdev)
 116 {
 117         return container_of(ibdev, struct iwch_dev, ibdev);
 118 }
 119
 120 static inline int t3b_device(const struct iwch_dev *rhp)
 121 {
 122         return rhp->rdev.t3cdev_p->type == T3B;
 123 }
 124
 125 static inline int t3a_device(const struct iwch_dev *rhp)
 126 {
 127         return rhp->rdev.t3cdev_p->type == T3A;
 128 }
 129
 130 static inline struct iwch_cq *get_chp(struct iwch_dev *rhp, u32 cqid)
 131 {
 132         return idr_find(&rhp->cqidr, cqid);
 133 }
 134
 135 static inline struct iwch_qp *get_qhp(struct iwch_dev *rhp, u32 qpid)
 136 {
 137         return idr_find(&rhp->qpidr, qpid);
 138 }
 139
 140 static inline struct iwch_mr *get_mhp(struct iwch_dev *rhp, u32 mmid)
 141 {
 142         return idr_find(&rhp->mmidr, mmid);
 143 }
 144
 145 static inline int insert_handle(struct iwch_dev *rhp, struct idr *idr,
 146                                 void *handle, u32 id)
 147 {
 148         int ret;
 149         int newid;
 150
 151         do {
 152                 if (!idr_pre_get(idr, GFP_KERNEL)) {
 153                         return -ENOMEM;
 154                 }
 155                 spin_lock_irq(&rhp->lock);
 156                 ret = idr_get_new_above(idr, handle, id, &newid);
 157                 BUG_ON(newid != id);
 158                 spin_unlock_irq(&rhp->lock);
 159         } while (ret == -EAGAIN);
 160
 161         return ret;
 162 }
 163
 164 static inline void remove_handle(struct iwch_dev *rhp, struct idr *idr, u32 id)
 165 {
 166         spin_lock_irq(&rhp->lock);
 167         idr_remove(idr, id);
 168         spin_unlock_irq(&rhp->lock);
 169 }
 170
 171 extern struct cxgb3_client t3c_client;
 172 extern cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
 173 extern void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb);
 174
 175 #endif