drivers/infiniband/hw/cxgb3/iwch.c

   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 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34
  35 #include <rdma/ib_verbs.h>
  36
  37 #include "cxgb3_offload.h"
  38 #include "iwch_provider.h"
  39 #include "iwch_user.h"
  40 #include "iwch.h"
  41 #include "iwch_cm.h"
  42
  43 #define DRV_VERSION "1.1"
  44
  45 MODULE_AUTHOR("Boyd Faulkner, Steve Wise");
  46 MODULE_DESCRIPTION("Chelsio T3 RDMA Driver");
  47 MODULE_LICENSE("Dual BSD/GPL");
  48 MODULE_VERSION(DRV_VERSION);
  49
  50 cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
  51
  52 static void open_rnic_dev(struct t3cdev *);
  53 static void close_rnic_dev(struct t3cdev *);
  54 static void iwch_err_handler(struct t3cdev *, u32, u32);
  55
  56 struct cxgb3_client t3c_client = {
  57         .name = "iw_cxgb3",
  58         .add = open_rnic_dev,
  59         .remove = close_rnic_dev,
  60         .handlers = t3c_handlers,
  61         .redirect = iwch_ep_redirect,
  62         .err_handler = iwch_err_handler
  63 };
  64
  65 static LIST_HEAD(dev_list);
  66 static DEFINE_MUTEX(dev_mutex);
  67
  68 static void rnic_init(struct iwch_dev *rnicp)
  69 {
  70         PDBG("%s iwch_dev %p\n", __func__,  rnicp);
  71         idr_init(&rnicp->cqidr);
  72         idr_init(&rnicp->qpidr);
  73         idr_init(&rnicp->mmidr);
  74         spin_lock_init(&rnicp->lock);
  75
  76         rnicp->attr.max_qps = T3_MAX_NUM_QP - 32;
  77         rnicp->attr.max_wrs = T3_MAX_QP_DEPTH;
  78         rnicp->attr.max_sge_per_wr = T3_MAX_SGE;
  79         rnicp->attr.max_sge_per_rdma_write_wr = T3_MAX_SGE;
  80         rnicp->attr.max_cqs = T3_MAX_NUM_CQ - 1;
  81         rnicp->attr.max_cqes_per_cq = T3_MAX_CQ_DEPTH;
  82         rnicp->attr.max_mem_regs = cxio_num_stags(&rnicp->rdev);
  83         rnicp->attr.max_phys_buf_entries = T3_MAX_PBL_SIZE;
  84         rnicp->attr.max_pds = T3_MAX_NUM_PD - 1;
  85         rnicp->attr.mem_pgsizes_bitmask = T3_PAGESIZE_MASK;
  86         rnicp->attr.max_mr_size = T3_MAX_MR_SIZE;
  87         rnicp->attr.can_resize_wq = 0;
  88         rnicp->attr.max_rdma_reads_per_qp = 8;
  89         rnicp->attr.max_rdma_read_resources =
  90             rnicp->attr.max_rdma_reads_per_qp * rnicp->attr.max_qps;
  91         rnicp->attr.max_rdma_read_qp_depth = 8; /* IRD */
  92         rnicp->attr.max_rdma_read_depth =
  93             rnicp->attr.max_rdma_read_qp_depth * rnicp->attr.max_qps;
  94         rnicp->attr.rq_overflow_handled = 0;
  95         rnicp->attr.can_modify_ird = 0;
  96         rnicp->attr.can_modify_ord = 0;
  97         rnicp->attr.max_mem_windows = rnicp->attr.max_mem_regs - 1;
  98         rnicp->attr.stag0_value = 1;
  99         rnicp->attr.zbva_support = 1;
 100         rnicp->attr.local_invalidate_fence = 1;
 101         rnicp->attr.cq_overflow_detection = 1;
 102         return;
 103 }
 104
 105 static void open_rnic_dev(struct t3cdev *tdev)
 106 {
 107         struct iwch_dev *rnicp;
 108
 109         PDBG("%s t3cdev %p\n", __func__,  tdev);
 110         printk_once(KERN_INFO MOD "Chelsio T3 RDMA Driver - version %s\n",
 111                        DRV_VERSION);
 112         rnicp = (struct iwch_dev *)ib_alloc_device(sizeof(*rnicp));
 113         if (!rnicp) {
 114                 printk(KERN_ERR MOD "Cannot allocate ib device\n");
 115                 return;
 116         }
 117         rnicp->rdev.ulp = rnicp;
 118         rnicp->rdev.t3cdev_p = tdev;
 119
 120         mutex_lock(&dev_mutex);
 121
 122         if (cxio_rdev_open(&rnicp->rdev)) {
 123                 mutex_unlock(&dev_mutex);
 124                 printk(KERN_ERR MOD "Unable to open CXIO rdev\n");
 125                 ib_dealloc_device(&rnicp->ibdev);
 126                 return;
 127         }
 128
 129         rnic_init(rnicp);
 130
 131         list_add_tail(&rnicp->entry, &dev_list);
 132         mutex_unlock(&dev_mutex);
 133
 134         if (iwch_register_device(rnicp)) {
 135                 printk(KERN_ERR MOD "Unable to register device\n");
 136                 close_rnic_dev(tdev);
 137         }
 138         printk(KERN_INFO MOD "Initialized device %s\n",
 139                pci_name(rnicp->rdev.rnic_info.pdev));
 140         return;
 141 }
 142
 143 static void close_rnic_dev(struct t3cdev *tdev)
 144 {
 145         struct iwch_dev *dev, *tmp;
 146         PDBG("%s t3cdev %p\n", __func__,  tdev);
 147         mutex_lock(&dev_mutex);
 148         list_for_each_entry_safe(dev, tmp, &dev_list, entry) {
 149                 if (dev->rdev.t3cdev_p == tdev) {
 150                         list_del(&dev->entry);
 151                         iwch_unregister_device(dev);
 152                         cxio_rdev_close(&dev->rdev);
 153                         idr_destroy(&dev->cqidr);
 154                         idr_destroy(&dev->qpidr);
 155                         idr_destroy(&dev->mmidr);
 156                         ib_dealloc_device(&dev->ibdev);
 157                         break;
 158                 }
 159         }
 160         mutex_unlock(&dev_mutex);
 161 }
 162
 163 static void iwch_err_handler(struct t3cdev *tdev, u32 status, u32 error)
 164 {
 165         struct cxio_rdev *rdev = tdev->ulp;
 166         struct iwch_dev *rnicp = rdev_to_iwch_dev(rdev);
 167         struct ib_event event;
 168
 169         if (status == OFFLOAD_STATUS_DOWN) {
 170                 rdev->flags = CXIO_ERROR_FATAL;
 171
 172                 event.device = &rnicp->ibdev;
 173                 event.event  = IB_EVENT_DEVICE_FATAL;
 174                 event.element.port_num = 0;
 175                 ib_dispatch_event(&event);
 176         }
 177
 178         return;
 179 }
 180
 181 static int __init iwch_init_module(void)
 182 {
 183         int err;
 184
 185         err = cxio_hal_init();
 186         if (err)
 187                 return err;
 188         err = iwch_cm_init();
 189         if (err)
 190                 return err;
 191         cxio_register_ev_cb(iwch_ev_dispatch);
 192         cxgb3_register_client(&t3c_client);
 193         return 0;
 194 }
 195
 196 static void __exit iwch_exit_module(void)
 197 {
 198         cxgb3_unregister_client(&t3c_client);
 199         cxio_unregister_ev_cb(iwch_ev_dispatch);
 200         iwch_cm_term();
 201         cxio_hal_exit();
 202 }
 203
 204 module_init(iwch_init_module);
 205 module_exit(iwch_exit_module);