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 #include <linux/workqueue.h>
  40
  41 #include <rdma/ib_verbs.h>
  42
  43 #include "cxio_hal.h"
  44 #include "cxgb3_offload.h"
  45
  46 struct iwch_pd;
  47 struct iwch_cq;
  48 struct iwch_qp;
  49 struct iwch_mr;
  50
  51 struct iwch_rnic_attributes {
  52         u32 max_qps;
  53         u32 max_wrs;                            /* Max for any SQ/RQ */
  54         u32 max_sge_per_wr;
  55         u32 max_sge_per_rdma_write_wr;  /* for RDMA Write WR */
  56         u32 max_cqs;
  57         u32 max_cqes_per_cq;
  58         u32 max_mem_regs;
  59         u32 max_phys_buf_entries;               /* for phys buf list */
  60         u32 max_pds;
  61
  62         /*
  63          * The memory page sizes supported by this RNIC.
  64          * Bit position i in bitmap indicates page of
  65          * size (4k)^i.  Phys block list mode unsupported.
  66          */
  67         u32 mem_pgsizes_bitmask;
  68         u64 max_mr_size;
  69         u8 can_resize_wq;
  70
  71         /*
  72          * The maximum number of RDMA Reads that can be outstanding
  73          * per QP with this RNIC as the target.
  74          */
  75         u32 max_rdma_reads_per_qp;
  76
  77         /*
  78          * The maximum number of resources used for RDMA Reads
  79          * by this RNIC with this RNIC as the target.
  80          */
  81         u32 max_rdma_read_resources;
  82
  83         /*
  84          * The max depth per QP for initiation of RDMA Read
  85          * by this RNIC.
  86          */
  87         u32 max_rdma_read_qp_depth;
  88
  89         /*
  90          * The maximum depth for initiation of RDMA Read
  91          * operations by this RNIC on all QPs
  92          */
  93         u32 max_rdma_read_depth;
  94         u8 rq_overflow_handled;
  95         u32 can_modify_ird;
  96         u32 can_modify_ord;
  97         u32 max_mem_windows;
  98         u32 stag0_value;
  99         u8 zbva_support;
 100         u8 local_invalidate_fence;
 101         u32 cq_overflow_detection;
 102 };
 103
 104 struct iwch_dev {
 105         struct ib_device ibdev;
 106         struct cxio_rdev rdev;
 107         u32 device_cap_flags;
 108         struct iwch_rnic_attributes attr;
 109         struct idr cqidr;
 110         struct idr qpidr;
 111         struct idr mmidr;
 112         spinlock_t lock;
 113         struct list_head entry;
 114         struct delayed_work db_drop_task;
 115 };
 116
 117 static inline struct iwch_dev *to_iwch_dev(struct ib_device *ibdev)
 118 {
 119         return container_of(ibdev, struct iwch_dev, ibdev);
 120 }
 121
 122 static inline struct iwch_dev *rdev_to_iwch_dev(struct cxio_rdev *rdev)
 123 {
 124         return container_of(rdev, struct iwch_dev, rdev);
 125 }
 126
 127 static inline int t3b_device(const struct iwch_dev *rhp)
 128 {
 129         return rhp->rdev.t3cdev_p->type == T3B;
 130 }
 131
 132 static inline int t3a_device(const struct iwch_dev *rhp)
 133 {
 134         return rhp->rdev.t3cdev_p->type == T3A;
 135 }
 136
 137 static inline struct iwch_cq *get_chp(struct iwch_dev *rhp, u32 cqid)
 138 {
 139         return idr_find(&rhp->cqidr, cqid);
 140 }
 141
 142 static inline struct iwch_qp *get_qhp(struct iwch_dev *rhp, u32 qpid)
 143 {
 144         return idr_find(&rhp->qpidr, qpid);
 145 }
 146
 147 static inline struct iwch_mr *get_mhp(struct iwch_dev *rhp, u32 mmid)
 148 {
 149         return idr_find(&rhp->mmidr, mmid);
 150 }
 151
 152 static inline int insert_handle(struct iwch_dev *rhp, struct idr *idr,
 153                                 void *handle, u32 id)
 154 {
 155         int ret;
 156         int newid;
 157
 158         do {
 159                 if (!idr_pre_get(idr, GFP_KERNEL)) {
 160                         return -ENOMEM;
 161                 }
 162                 spin_lock_irq(&rhp->lock);
 163                 ret = idr_get_new_above(idr, handle, id, &newid);
 164                 BUG_ON(newid != id);
 165                 spin_unlock_irq(&rhp->lock);
 166         } while (ret == -EAGAIN);
 167
 168         return ret;
 169 }
 170
 171 static inline void remove_handle(struct iwch_dev *rhp, struct idr *idr, u32 id)
 172 {
 173         spin_lock_irq(&rhp->lock);
 174         idr_remove(idr, id);
 175         spin_unlock_irq(&rhp->lock);
 176 }
 177
 178 extern struct cxgb3_client t3c_client;
 179 extern cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
 180 extern void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb);
 181
 182 #endif