Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IBM eServer eHCA Infiniband device driver for Linux on POWER |
| 3 | * |
| 4 | * Completion queue handling |
| 5 | * |
| 6 | * Authors: Waleri Fomin <fomin@de.ibm.com> |
| 7 | * Khadija Souissi <souissi@de.ibm.com> |
| 8 | * Reinhard Ernst <rernst@de.ibm.com> |
| 9 | * Heiko J Schick <schickhj@de.ibm.com> |
| 10 | * Hoang-Nam Nguyen <hnguyen@de.ibm.com> |
| 11 | * |
| 12 | * |
| 13 | * Copyright (c) 2005 IBM Corporation |
| 14 | * |
| 15 | * All rights reserved. |
| 16 | * |
| 17 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB |
| 18 | * BSD. |
| 19 | * |
| 20 | * OpenIB BSD License |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions are met: |
| 24 | * |
| 25 | * Redistributions of source code must retain the above copyright notice, this |
| 26 | * list of conditions and the following disclaimer. |
| 27 | * |
| 28 | * Redistributions in binary form must reproduce the above copyright notice, |
| 29 | * this list of conditions and the following disclaimer in the documentation |
| 30 | * and/or other materials |
| 31 | * provided with the distribution. |
| 32 | * |
| 33 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 34 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 35 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 36 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 37 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 38 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 39 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 40 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| 41 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 42 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 43 | * POSSIBILITY OF SUCH DAMAGE. |
| 44 | */ |
| 45 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 46 | #include <linux/slab.h> |
| 47 | |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 48 | #include "ehca_iverbs.h" |
| 49 | #include "ehca_classes.h" |
| 50 | #include "ehca_irq.h" |
| 51 | #include "hcp_if.h" |
| 52 | |
| 53 | static struct kmem_cache *cq_cache; |
| 54 | |
| 55 | int ehca_cq_assign_qp(struct ehca_cq *cq, struct ehca_qp *qp) |
| 56 | { |
| 57 | unsigned int qp_num = qp->real_qp_num; |
| 58 | unsigned int key = qp_num & (QP_HASHTAB_LEN-1); |
Joachim Fenkes | 9844b71 | 2007-07-09 15:29:03 +0200 | [diff] [blame] | 59 | unsigned long flags; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 60 | |
Joachim Fenkes | 9844b71 | 2007-07-09 15:29:03 +0200 | [diff] [blame] | 61 | spin_lock_irqsave(&cq->spinlock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 62 | hlist_add_head(&qp->list_entries, &cq->qp_hashtab[key]); |
Joachim Fenkes | 9844b71 | 2007-07-09 15:29:03 +0200 | [diff] [blame] | 63 | spin_unlock_irqrestore(&cq->spinlock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 64 | |
| 65 | ehca_dbg(cq->ib_cq.device, "cq_num=%x real_qp_num=%x", |
| 66 | cq->cq_number, qp_num); |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | int ehca_cq_unassign_qp(struct ehca_cq *cq, unsigned int real_qp_num) |
| 72 | { |
| 73 | int ret = -EINVAL; |
| 74 | unsigned int key = real_qp_num & (QP_HASHTAB_LEN-1); |
| 75 | struct hlist_node *iter; |
| 76 | struct ehca_qp *qp; |
Joachim Fenkes | 9844b71 | 2007-07-09 15:29:03 +0200 | [diff] [blame] | 77 | unsigned long flags; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 78 | |
Joachim Fenkes | 9844b71 | 2007-07-09 15:29:03 +0200 | [diff] [blame] | 79 | spin_lock_irqsave(&cq->spinlock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 80 | hlist_for_each(iter, &cq->qp_hashtab[key]) { |
| 81 | qp = hlist_entry(iter, struct ehca_qp, list_entries); |
| 82 | if (qp->real_qp_num == real_qp_num) { |
| 83 | hlist_del(iter); |
| 84 | ehca_dbg(cq->ib_cq.device, |
| 85 | "removed qp from cq .cq_num=%x real_qp_num=%x", |
| 86 | cq->cq_number, real_qp_num); |
| 87 | ret = 0; |
| 88 | break; |
| 89 | } |
| 90 | } |
Joachim Fenkes | 9844b71 | 2007-07-09 15:29:03 +0200 | [diff] [blame] | 91 | spin_unlock_irqrestore(&cq->spinlock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 92 | if (ret) |
| 93 | ehca_err(cq->ib_cq.device, |
| 94 | "qp not found cq_num=%x real_qp_num=%x", |
| 95 | cq->cq_number, real_qp_num); |
| 96 | |
| 97 | return ret; |
| 98 | } |
| 99 | |
Hoang-Nam Nguyen | 2b94397 | 2007-07-12 17:53:47 +0200 | [diff] [blame] | 100 | struct ehca_qp *ehca_cq_get_qp(struct ehca_cq *cq, int real_qp_num) |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 101 | { |
| 102 | struct ehca_qp *ret = NULL; |
| 103 | unsigned int key = real_qp_num & (QP_HASHTAB_LEN-1); |
| 104 | struct hlist_node *iter; |
| 105 | struct ehca_qp *qp; |
| 106 | hlist_for_each(iter, &cq->qp_hashtab[key]) { |
| 107 | qp = hlist_entry(iter, struct ehca_qp, list_entries); |
| 108 | if (qp->real_qp_num == real_qp_num) { |
| 109 | ret = qp; |
| 110 | break; |
| 111 | } |
| 112 | } |
| 113 | return ret; |
| 114 | } |
| 115 | |
Matan Barak | bcf4c1e | 2015-06-11 16:35:20 +0300 | [diff] [blame] | 116 | struct ib_cq *ehca_create_cq(struct ib_device *device, |
| 117 | const struct ib_cq_init_attr *attr, |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 118 | struct ib_ucontext *context, |
| 119 | struct ib_udata *udata) |
| 120 | { |
Matan Barak | bcf4c1e | 2015-06-11 16:35:20 +0300 | [diff] [blame] | 121 | int cqe = attr->cqe; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 122 | static const u32 additional_cqe = 20; |
| 123 | struct ib_cq *cq; |
| 124 | struct ehca_cq *my_cq; |
| 125 | struct ehca_shca *shca = |
| 126 | container_of(device, struct ehca_shca, ib_device); |
| 127 | struct ipz_adapter_handle adapter_handle; |
| 128 | struct ehca_alloc_cq_parms param; /* h_call's out parameters */ |
| 129 | struct h_galpa gal; |
| 130 | void *vpage; |
| 131 | u32 counter; |
| 132 | u64 rpage, cqx_fec, h_ret; |
Tejun Heo | cbbbce1 | 2013-02-27 17:04:21 -0800 | [diff] [blame] | 133 | int ipz_rc, i; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 134 | unsigned long flags; |
| 135 | |
Matan Barak | bcf4c1e | 2015-06-11 16:35:20 +0300 | [diff] [blame] | 136 | if (attr->flags) |
| 137 | return ERR_PTR(-EINVAL); |
| 138 | |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 139 | if (cqe >= 0xFFFFFFFF - 64 - additional_cqe) |
| 140 | return ERR_PTR(-EINVAL); |
| 141 | |
Stefan Roscher | 19f4282 | 2008-10-22 15:52:31 -0700 | [diff] [blame] | 142 | if (!atomic_add_unless(&shca->num_cqs, 1, shca->max_num_cqs)) { |
Stefan Roscher | d227fa7 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 143 | ehca_err(device, "Unable to create CQ, max number of %i " |
Stefan Roscher | 19f4282 | 2008-10-22 15:52:31 -0700 | [diff] [blame] | 144 | "CQs reached.", shca->max_num_cqs); |
Stefan Roscher | d227fa7 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 145 | ehca_err(device, "To increase the maximum number of CQs " |
| 146 | "use the number_of_cqs module parameter.\n"); |
| 147 | return ERR_PTR(-ENOSPC); |
| 148 | } |
| 149 | |
Robert P. J. Day | c376222 | 2007-02-10 01:45:03 -0800 | [diff] [blame] | 150 | my_cq = kmem_cache_zalloc(cq_cache, GFP_KERNEL); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 151 | if (!my_cq) { |
| 152 | ehca_err(device, "Out of memory for ehca_cq struct device=%p", |
| 153 | device); |
Stefan Roscher | d227fa7 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 154 | atomic_dec(&shca->num_cqs); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 155 | return ERR_PTR(-ENOMEM); |
| 156 | } |
| 157 | |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 158 | memset(¶m, 0, sizeof(struct ehca_alloc_cq_parms)); |
| 159 | |
| 160 | spin_lock_init(&my_cq->spinlock); |
| 161 | spin_lock_init(&my_cq->cb_lock); |
| 162 | spin_lock_init(&my_cq->task_lock); |
Joachim Fenkes | 28db6be | 2007-07-09 15:30:39 +0200 | [diff] [blame] | 163 | atomic_set(&my_cq->nr_events, 0); |
Hoang-Nam Nguyen | 3172679 | 2007-02-28 18:01:02 +0100 | [diff] [blame] | 164 | init_waitqueue_head(&my_cq->wait_completion); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 165 | |
| 166 | cq = &my_cq->ib_cq; |
| 167 | |
| 168 | adapter_handle = shca->ipz_hca_handle; |
| 169 | param.eq_handle = shca->eq.ipz_eq_handle; |
| 170 | |
Tejun Heo | cbbbce1 | 2013-02-27 17:04:21 -0800 | [diff] [blame] | 171 | idr_preload(GFP_KERNEL); |
| 172 | write_lock_irqsave(&ehca_cq_idr_lock, flags); |
| 173 | my_cq->token = idr_alloc(&ehca_cq_idr, my_cq, 0, 0x2000000, GFP_NOWAIT); |
| 174 | write_unlock_irqrestore(&ehca_cq_idr_lock, flags); |
| 175 | idr_preload_end(); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 176 | |
Tejun Heo | cbbbce1 | 2013-02-27 17:04:21 -0800 | [diff] [blame] | 177 | if (my_cq->token < 0) { |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 178 | cq = ERR_PTR(-ENOMEM); |
| 179 | ehca_err(device, "Can't allocate new idr entry. device=%p", |
| 180 | device); |
| 181 | goto create_cq_exit1; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * CQs maximum depth is 4GB-64, but we need additional 20 as buffer |
| 186 | * for receiving errors CQEs. |
| 187 | */ |
| 188 | param.nr_cqe = cqe + additional_cqe; |
| 189 | h_ret = hipz_h_alloc_resource_cq(adapter_handle, my_cq, ¶m); |
| 190 | |
| 191 | if (h_ret != H_SUCCESS) { |
| 192 | ehca_err(device, "hipz_h_alloc_resource_cq() failed " |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 193 | "h_ret=%lli device=%p", h_ret, device); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 194 | cq = ERR_PTR(ehca2ib_return_code(h_ret)); |
| 195 | goto create_cq_exit2; |
| 196 | } |
| 197 | |
Stefan Roscher | e2f81da | 2007-07-20 16:04:17 +0200 | [diff] [blame] | 198 | ipz_rc = ipz_queue_ctor(NULL, &my_cq->ipz_queue, param.act_pages, |
| 199 | EHCA_PAGESIZE, sizeof(struct ehca_cqe), 0, 0); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 200 | if (!ipz_rc) { |
Joachim Fenkes | e372219 | 2007-09-11 15:32:22 +0200 | [diff] [blame] | 201 | ehca_err(device, "ipz_queue_ctor() failed ipz_rc=%i device=%p", |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 202 | ipz_rc, device); |
| 203 | cq = ERR_PTR(-EINVAL); |
| 204 | goto create_cq_exit3; |
| 205 | } |
| 206 | |
| 207 | for (counter = 0; counter < param.act_pages; counter++) { |
| 208 | vpage = ipz_qpageit_get_inc(&my_cq->ipz_queue); |
| 209 | if (!vpage) { |
| 210 | ehca_err(device, "ipz_qpageit_get_inc() " |
| 211 | "returns NULL device=%p", device); |
| 212 | cq = ERR_PTR(-EAGAIN); |
| 213 | goto create_cq_exit4; |
| 214 | } |
Michael Ellerman | b4b8d1e | 2012-07-25 21:19:53 +0000 | [diff] [blame] | 215 | rpage = __pa(vpage); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 216 | |
| 217 | h_ret = hipz_h_register_rpage_cq(adapter_handle, |
| 218 | my_cq->ipz_cq_handle, |
| 219 | &my_cq->pf, |
| 220 | 0, |
| 221 | 0, |
| 222 | rpage, |
| 223 | 1, |
| 224 | my_cq->galpas. |
| 225 | kernel); |
| 226 | |
| 227 | if (h_ret < H_SUCCESS) { |
| 228 | ehca_err(device, "hipz_h_register_rpage_cq() failed " |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 229 | "ehca_cq=%p cq_num=%x h_ret=%lli counter=%i " |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 230 | "act_pages=%i", my_cq, my_cq->cq_number, |
| 231 | h_ret, counter, param.act_pages); |
| 232 | cq = ERR_PTR(-EINVAL); |
| 233 | goto create_cq_exit4; |
| 234 | } |
| 235 | |
| 236 | if (counter == (param.act_pages - 1)) { |
| 237 | vpage = ipz_qpageit_get_inc(&my_cq->ipz_queue); |
| 238 | if ((h_ret != H_SUCCESS) || vpage) { |
| 239 | ehca_err(device, "Registration of pages not " |
| 240 | "complete ehca_cq=%p cq_num=%x " |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 241 | "h_ret=%lli", my_cq, my_cq->cq_number, |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 242 | h_ret); |
| 243 | cq = ERR_PTR(-EAGAIN); |
| 244 | goto create_cq_exit4; |
| 245 | } |
| 246 | } else { |
| 247 | if (h_ret != H_PAGE_REGISTERED) { |
| 248 | ehca_err(device, "Registration of page failed " |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 249 | "ehca_cq=%p cq_num=%x h_ret=%lli " |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 250 | "counter=%i act_pages=%i", |
| 251 | my_cq, my_cq->cq_number, |
| 252 | h_ret, counter, param.act_pages); |
| 253 | cq = ERR_PTR(-ENOMEM); |
| 254 | goto create_cq_exit4; |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | ipz_qeit_reset(&my_cq->ipz_queue); |
| 260 | |
| 261 | gal = my_cq->galpas.kernel; |
| 262 | cqx_fec = hipz_galpa_load(gal, CQTEMM_OFFSET(cqx_fec)); |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 263 | ehca_dbg(device, "ehca_cq=%p cq_num=%x CQX_FEC=%llx", |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 264 | my_cq, my_cq->cq_number, cqx_fec); |
| 265 | |
| 266 | my_cq->ib_cq.cqe = my_cq->nr_of_entries = |
| 267 | param.act_nr_of_entries - additional_cqe; |
| 268 | my_cq->cq_number = (my_cq->ipz_cq_handle.handle) & 0xffff; |
| 269 | |
| 270 | for (i = 0; i < QP_HASHTAB_LEN; i++) |
| 271 | INIT_HLIST_HEAD(&my_cq->qp_hashtab[i]); |
| 272 | |
Alexander Schmidt | b9012e0 | 2008-09-20 20:05:21 -0700 | [diff] [blame] | 273 | INIT_LIST_HEAD(&my_cq->sqp_err_list); |
| 274 | INIT_LIST_HEAD(&my_cq->rqp_err_list); |
| 275 | |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 276 | if (context) { |
| 277 | struct ipz_queue *ipz_queue = &my_cq->ipz_queue; |
| 278 | struct ehca_create_cq_resp resp; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 279 | memset(&resp, 0, sizeof(resp)); |
| 280 | resp.cq_number = my_cq->cq_number; |
| 281 | resp.token = my_cq->token; |
| 282 | resp.ipz_queue.qe_size = ipz_queue->qe_size; |
| 283 | resp.ipz_queue.act_nr_of_sg = ipz_queue->act_nr_of_sg; |
| 284 | resp.ipz_queue.queue_length = ipz_queue->queue_length; |
| 285 | resp.ipz_queue.pagesize = ipz_queue->pagesize; |
| 286 | resp.ipz_queue.toggle_state = ipz_queue->toggle_state; |
Hoang-Nam Nguyen | e390d3b | 2007-09-11 15:31:06 +0200 | [diff] [blame] | 287 | resp.fw_handle_ofs = (u32) |
| 288 | (my_cq->galpas.user.fw_handle & (PAGE_SIZE - 1)); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 289 | if (ib_copy_to_udata(udata, &resp, sizeof(resp))) { |
| 290 | ehca_err(device, "Copy to udata failed."); |
Yann Droneaud | 5bdb0f02 | 2014-03-10 23:06:25 +0100 | [diff] [blame] | 291 | cq = ERR_PTR(-EFAULT); |
Hoang-Nam Nguyen | 4c34bdf | 2007-01-24 00:13:35 +0100 | [diff] [blame] | 292 | goto create_cq_exit4; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 293 | } |
| 294 | } |
| 295 | |
| 296 | return cq; |
| 297 | |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 298 | create_cq_exit4: |
Stefan Roscher | e2f81da | 2007-07-20 16:04:17 +0200 | [diff] [blame] | 299 | ipz_queue_dtor(NULL, &my_cq->ipz_queue); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 300 | |
| 301 | create_cq_exit3: |
| 302 | h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 1); |
| 303 | if (h_ret != H_SUCCESS) |
| 304 | ehca_err(device, "hipz_h_destroy_cq() failed ehca_cq=%p " |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 305 | "cq_num=%x h_ret=%lli", my_cq, my_cq->cq_number, h_ret); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 306 | |
| 307 | create_cq_exit2: |
Joachim Fenkes | 26ed687 | 2007-07-09 15:31:10 +0200 | [diff] [blame] | 308 | write_lock_irqsave(&ehca_cq_idr_lock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 309 | idr_remove(&ehca_cq_idr, my_cq->token); |
Joachim Fenkes | 26ed687 | 2007-07-09 15:31:10 +0200 | [diff] [blame] | 310 | write_unlock_irqrestore(&ehca_cq_idr_lock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 311 | |
| 312 | create_cq_exit1: |
| 313 | kmem_cache_free(cq_cache, my_cq); |
| 314 | |
Stefan Roscher | d227fa7 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 315 | atomic_dec(&shca->num_cqs); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 316 | return cq; |
| 317 | } |
| 318 | |
| 319 | int ehca_destroy_cq(struct ib_cq *cq) |
| 320 | { |
| 321 | u64 h_ret; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 322 | struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq); |
| 323 | int cq_num = my_cq->cq_number; |
| 324 | struct ib_device *device = cq->device; |
| 325 | struct ehca_shca *shca = container_of(device, struct ehca_shca, |
| 326 | ib_device); |
| 327 | struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle; |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 328 | unsigned long flags; |
| 329 | |
Hoang-Nam Nguyen | 4c34bdf | 2007-01-24 00:13:35 +0100 | [diff] [blame] | 330 | if (cq->uobject) { |
| 331 | if (my_cq->mm_count_galpa || my_cq->mm_count_queue) { |
| 332 | ehca_err(device, "Resources still referenced in " |
| 333 | "user space cq_num=%x", my_cq->cq_number); |
| 334 | return -EINVAL; |
| 335 | } |
Hoang-Nam Nguyen | 4c34bdf | 2007-01-24 00:13:35 +0100 | [diff] [blame] | 336 | } |
| 337 | |
Joachim Fenkes | 28db6be | 2007-07-09 15:30:39 +0200 | [diff] [blame] | 338 | /* |
| 339 | * remove the CQ from the idr first to make sure |
| 340 | * no more interrupt tasklets will touch this CQ |
| 341 | */ |
Joachim Fenkes | 26ed687 | 2007-07-09 15:31:10 +0200 | [diff] [blame] | 342 | write_lock_irqsave(&ehca_cq_idr_lock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 343 | idr_remove(&ehca_cq_idr, my_cq->token); |
Joachim Fenkes | 26ed687 | 2007-07-09 15:31:10 +0200 | [diff] [blame] | 344 | write_unlock_irqrestore(&ehca_cq_idr_lock, flags); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 345 | |
Joachim Fenkes | 28db6be | 2007-07-09 15:30:39 +0200 | [diff] [blame] | 346 | /* now wait until all pending events have completed */ |
| 347 | wait_event(my_cq->wait_completion, !atomic_read(&my_cq->nr_events)); |
| 348 | |
| 349 | /* nobody's using our CQ any longer -- we can destroy it */ |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 350 | h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 0); |
| 351 | if (h_ret == H_R_STATE) { |
| 352 | /* cq in err: read err data and destroy it forcibly */ |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 353 | ehca_dbg(device, "ehca_cq=%p cq_num=%x resource=%llx in err " |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 354 | "state. Try to delete it forcibly.", |
| 355 | my_cq, cq_num, my_cq->ipz_cq_handle.handle); |
| 356 | ehca_error_data(shca, my_cq, my_cq->ipz_cq_handle.handle); |
| 357 | h_ret = hipz_h_destroy_cq(adapter_handle, my_cq, 1); |
| 358 | if (h_ret == H_SUCCESS) |
| 359 | ehca_dbg(device, "cq_num=%x deleted successfully.", |
| 360 | cq_num); |
| 361 | } |
| 362 | if (h_ret != H_SUCCESS) { |
Stephen Rothwell | 3750f60 | 2009-01-16 14:55:28 -0800 | [diff] [blame] | 363 | ehca_err(device, "hipz_h_destroy_cq() failed h_ret=%lli " |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 364 | "ehca_cq=%p cq_num=%x", h_ret, my_cq, cq_num); |
| 365 | return ehca2ib_return_code(h_ret); |
| 366 | } |
Stefan Roscher | e2f81da | 2007-07-20 16:04:17 +0200 | [diff] [blame] | 367 | ipz_queue_dtor(NULL, &my_cq->ipz_queue); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 368 | kmem_cache_free(cq_cache, my_cq); |
| 369 | |
Stefan Roscher | d227fa7 | 2008-04-29 13:46:53 -0700 | [diff] [blame] | 370 | atomic_dec(&shca->num_cqs); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | int ehca_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata) |
| 375 | { |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 376 | /* TODO: proper resize needs to be done */ |
| 377 | ehca_err(cq->device, "not implemented yet"); |
| 378 | |
| 379 | return -EFAULT; |
| 380 | } |
| 381 | |
| 382 | int ehca_init_cq_cache(void) |
| 383 | { |
| 384 | cq_cache = kmem_cache_create("ehca_cache_cq", |
| 385 | sizeof(struct ehca_cq), 0, |
| 386 | SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 387 | NULL); |
Heiko J Schick | fab9722 | 2006-09-22 15:22:22 -0700 | [diff] [blame] | 388 | if (!cq_cache) |
| 389 | return -ENOMEM; |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | void ehca_cleanup_cq_cache(void) |
| 394 | { |
| 395 | if (cq_cache) |
| 396 | kmem_cache_destroy(cq_cache); |
| 397 | } |