drivers/infiniband/hw/cxgb3/iwch.h

   1 /*
   2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
   3  * Copyright (c) 2006 Open Grid Computing, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33 #ifndef __IWCH_H__
  34 #define __IWCH_H__
  35
  36 #include <linux/mutex.h>
  37 #include <linux/list.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/idr.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 vendor_id;
  53         u32 vendor_part_id;
  54         u32 max_qps;
  55         u32 max_wrs;                            /* Max for any SQ/RQ */
  56         u32 max_sge_per_wr;
  57         u32 max_sge_per_rdma_write_wr;  /* for RDMA Write WR */
  58         u32 max_cqs;
  59         u32 max_cqes_per_cq;
  60         u32 max_mem_regs;
  61         u32 max_phys_buf_entries;               /* for phys buf list */
  62         u32 max_pds;
  63
  64         /*
  65          * The memory page sizes supported by this RNIC.
  66          * Bit position i in bitmap indicates page of
  67          * size (4k)^i.  Phys block list mode unsupported.
  68          */
  69         u32 mem_pgsizes_bitmask;
  70         u8 can_resize_wq;
  71
  72         /*
  73          * The maximum number of RDMA Reads that can be outstanding
  74          * per QP with this RNIC as the target.
  75          */
  76         u32 max_rdma_reads_per_qp;
  77
  78         /*
  79          * The maximum number of resources used for RDMA Reads
  80          * by this RNIC with this RNIC as the target.
  81          */
  82         u32 max_rdma_read_resources;
  83
  84         /*
  85          * The max depth per QP for initiation of RDMA Read
  86          * by this RNIC.
  87          */
  88         u32 max_rdma_read_qp_depth;
  89
  90         /*
  91          * The maximum depth for initiation of RDMA Read
  92          * operations by this RNIC on all QPs
  93          */
  94         u32 max_rdma_read_depth;
  95         u8 rq_overflow_handled;
  96         u32 can_modify_ird;
  97         u32 can_modify_ord;
  98         u32 max_mem_windows;
  99         u32 stag0_value;
 100         u8 zbva_support;
 101         u8 local_invalidate_fence;
 102         u32 cq_overflow_detection;
 103 };
 104
 105 struct iwch_dev {
 106         struct ib_device ibdev;
 107         struct cxio_rdev rdev;
 108         u32 device_cap_flags;
 109         struct iwch_rnic_attributes attr;
 110         struct idr cqidr;
 111         struct idr qpidr;
 112         struct idr mmidr;
 113         spinlock_t lock;
 114         struct list_head entry;
 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 int t3b_device(const struct iwch_dev *rhp)
 123 {
 124         return rhp->rdev.t3cdev_p->type == T3B;
 125 }
 126
 127 static inline int t3a_device(const struct iwch_dev *rhp)
 128 {
 129         return rhp->rdev.t3cdev_p->type == T3A;
 130 }
 131
 132 static inline struct iwch_cq *get_chp(struct iwch_dev *rhp, u32 cqid)
 133 {
 134         return idr_find(&rhp->cqidr, cqid);
 135 }
 136
 137 static inline struct iwch_qp *get_qhp(struct iwch_dev *rhp, u32 qpid)
 138 {
 139         return idr_find(&rhp->qpidr, qpid);
 140 }
 141
 142 static inline struct iwch_mr *get_mhp(struct iwch_dev *rhp, u32 mmid)
 143 {
 144         return idr_find(&rhp->mmidr, mmid);
 145 }
 146
 147 static inline int insert_handle(struct iwch_dev *rhp, struct idr *idr,
 148                                 void *handle, u32 id)
 149 {
 150         int ret;
 151         u32 newid;
 152
 153         do {
 154                 if (!idr_pre_get(idr, GFP_KERNEL)) {
 155                         return -ENOMEM;
 156                 }
 157                 spin_lock_irq(&rhp->lock);
 158                 ret = idr_get_new_above(idr, handle, id, &newid);
 159                 BUG_ON(newid != id);
 160                 spin_unlock_irq(&rhp->lock);
 161         } while (ret == -EAGAIN);
 162
 163         return ret;
 164 }
 165
 166 static inline void remove_handle(struct iwch_dev *rhp, struct idr *idr, u32 id)
 167 {
 168         spin_lock_irq(&rhp->lock);
 169         idr_remove(idr, id);
 170         spin_unlock_irq(&rhp->lock);
 171 }
 172
 173 extern struct cxgb3_client t3c_client;
 174 extern cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
 175 extern void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb);
 176
 177 #endif