Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Cisco Systems. 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. |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 31 | */ |
| 32 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 33 | #include <linux/slab.h> |
| 34 | #include <linux/string.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 35 | #include <linux/sched.h> |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 36 | |
Arthur Kepner | 1f5c23e | 2006-10-16 20:22:35 -0700 | [diff] [blame] | 37 | #include <asm/io.h> |
| 38 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 39 | #include "mthca_dev.h" |
| 40 | #include "mthca_cmd.h" |
| 41 | #include "mthca_memfree.h" |
| 42 | #include "mthca_wqe.h" |
| 43 | |
| 44 | enum { |
| 45 | MTHCA_MAX_DIRECT_SRQ_SIZE = 4 * PAGE_SIZE |
| 46 | }; |
| 47 | |
| 48 | struct mthca_tavor_srq_context { |
| 49 | __be64 wqe_base_ds; /* low 6 bits is descriptor size */ |
| 50 | __be32 state_pd; |
| 51 | __be32 lkey; |
| 52 | __be32 uar; |
Eli Cohen | fd02e80 | 2006-03-13 14:33:01 +0200 | [diff] [blame] | 53 | __be16 limit_watermark; |
| 54 | __be16 wqe_cnt; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 55 | u32 reserved[2]; |
| 56 | }; |
| 57 | |
| 58 | struct mthca_arbel_srq_context { |
| 59 | __be32 state_logsize_srqn; |
| 60 | __be32 lkey; |
| 61 | __be32 db_index; |
| 62 | __be32 logstride_usrpage; |
| 63 | __be64 wqe_base; |
| 64 | __be32 eq_pd; |
| 65 | __be16 limit_watermark; |
| 66 | __be16 wqe_cnt; |
| 67 | u16 reserved1; |
| 68 | __be16 wqe_counter; |
| 69 | u32 reserved2[3]; |
| 70 | }; |
| 71 | |
| 72 | static void *get_wqe(struct mthca_srq *srq, int n) |
| 73 | { |
| 74 | if (srq->is_direct) |
| 75 | return srq->queue.direct.buf + (n << srq->wqe_shift); |
| 76 | else |
| 77 | return srq->queue.page_list[(n << srq->wqe_shift) >> PAGE_SHIFT].buf + |
| 78 | ((n << srq->wqe_shift) & (PAGE_SIZE - 1)); |
| 79 | } |
| 80 | |
| 81 | /* |
| 82 | * Return a pointer to the location within a WQE that we're using as a |
Roland Dreier | e5b251a | 2005-10-30 13:07:03 -0800 | [diff] [blame] | 83 | * link when the WQE is in the free list. We use the imm field |
| 84 | * because in the Tavor case, posting a WQE may overwrite the next |
| 85 | * segment of the previous WQE, but a receive WQE will never touch the |
| 86 | * imm field. This avoids corrupting our free list if the previous |
| 87 | * WQE has already completed and been put on the free list when we |
| 88 | * post the next WQE. |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 89 | */ |
| 90 | static inline int *wqe_to_link(void *wqe) |
| 91 | { |
Roland Dreier | e5b251a | 2005-10-30 13:07:03 -0800 | [diff] [blame] | 92 | return (int *) (wqe + offsetof(struct mthca_next_seg, imm)); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static void mthca_tavor_init_srq_context(struct mthca_dev *dev, |
| 96 | struct mthca_pd *pd, |
| 97 | struct mthca_srq *srq, |
| 98 | struct mthca_tavor_srq_context *context) |
| 99 | { |
| 100 | memset(context, 0, sizeof *context); |
| 101 | |
| 102 | context->wqe_base_ds = cpu_to_be64(1 << (srq->wqe_shift - 4)); |
| 103 | context->state_pd = cpu_to_be32(pd->pd_num); |
| 104 | context->lkey = cpu_to_be32(srq->mr.ibmr.lkey); |
| 105 | |
| 106 | if (pd->ibpd.uobject) |
| 107 | context->uar = |
| 108 | cpu_to_be32(to_mucontext(pd->ibpd.uobject->context)->uar.index); |
| 109 | else |
| 110 | context->uar = cpu_to_be32(dev->driver_uar.index); |
| 111 | } |
| 112 | |
| 113 | static void mthca_arbel_init_srq_context(struct mthca_dev *dev, |
| 114 | struct mthca_pd *pd, |
| 115 | struct mthca_srq *srq, |
| 116 | struct mthca_arbel_srq_context *context) |
| 117 | { |
David Howells | 6bdd61d | 2007-02-05 16:21:08 -0800 | [diff] [blame] | 118 | int logsize, max; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 119 | |
| 120 | memset(context, 0, sizeof *context); |
| 121 | |
David Howells | 6bdd61d | 2007-02-05 16:21:08 -0800 | [diff] [blame] | 122 | /* |
| 123 | * Put max in a temporary variable to work around gcc bug |
| 124 | * triggered by ilog2() on sparc64. |
| 125 | */ |
| 126 | max = srq->max; |
| 127 | logsize = ilog2(max); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 128 | context->state_logsize_srqn = cpu_to_be32(logsize << 24 | srq->srqn); |
| 129 | context->lkey = cpu_to_be32(srq->mr.ibmr.lkey); |
| 130 | context->db_index = cpu_to_be32(srq->db_index); |
| 131 | context->logstride_usrpage = cpu_to_be32((srq->wqe_shift - 4) << 29); |
| 132 | if (pd->ibpd.uobject) |
| 133 | context->logstride_usrpage |= |
| 134 | cpu_to_be32(to_mucontext(pd->ibpd.uobject->context)->uar.index); |
| 135 | else |
| 136 | context->logstride_usrpage |= cpu_to_be32(dev->driver_uar.index); |
| 137 | context->eq_pd = cpu_to_be32(MTHCA_EQ_ASYNC << 24 | pd->pd_num); |
| 138 | } |
| 139 | |
| 140 | static void mthca_free_srq_buf(struct mthca_dev *dev, struct mthca_srq *srq) |
| 141 | { |
| 142 | mthca_buf_free(dev, srq->max << srq->wqe_shift, &srq->queue, |
| 143 | srq->is_direct, &srq->mr); |
| 144 | kfree(srq->wrid); |
| 145 | } |
| 146 | |
| 147 | static int mthca_alloc_srq_buf(struct mthca_dev *dev, struct mthca_pd *pd, |
| 148 | struct mthca_srq *srq) |
| 149 | { |
| 150 | struct mthca_data_seg *scatter; |
| 151 | void *wqe; |
| 152 | int err; |
| 153 | int i; |
| 154 | |
| 155 | if (pd->ibpd.uobject) |
| 156 | return 0; |
| 157 | |
| 158 | srq->wrid = kmalloc(srq->max * sizeof (u64), GFP_KERNEL); |
| 159 | if (!srq->wrid) |
| 160 | return -ENOMEM; |
| 161 | |
| 162 | err = mthca_buf_alloc(dev, srq->max << srq->wqe_shift, |
| 163 | MTHCA_MAX_DIRECT_SRQ_SIZE, |
| 164 | &srq->queue, &srq->is_direct, pd, 1, &srq->mr); |
| 165 | if (err) { |
| 166 | kfree(srq->wrid); |
| 167 | return err; |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Now initialize the SRQ buffer so that all of the WQEs are |
| 172 | * linked into the list of free WQEs. In addition, set the |
| 173 | * scatter list L_Keys to the sentry value of 0x100. |
| 174 | */ |
| 175 | for (i = 0; i < srq->max; ++i) { |
Eli Cohen | 1d368c5 | 2008-01-24 06:38:06 -0800 | [diff] [blame] | 176 | struct mthca_next_seg *next; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 177 | |
Eli Cohen | 1d368c5 | 2008-01-24 06:38:06 -0800 | [diff] [blame] | 178 | next = wqe = get_wqe(srq, i); |
| 179 | |
| 180 | if (i < srq->max - 1) { |
| 181 | *wqe_to_link(wqe) = i + 1; |
| 182 | next->nda_op = htonl(((i + 1) << srq->wqe_shift) | 1); |
| 183 | } else { |
| 184 | *wqe_to_link(wqe) = -1; |
| 185 | next->nda_op = 0; |
| 186 | } |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 187 | |
| 188 | for (scatter = wqe + sizeof (struct mthca_next_seg); |
| 189 | (void *) scatter < wqe + (1 << srq->wqe_shift); |
| 190 | ++scatter) |
| 191 | scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); |
| 192 | } |
| 193 | |
Roland Dreier | 6577ae5 | 2005-09-19 09:17:56 -0700 | [diff] [blame] | 194 | srq->last = get_wqe(srq, srq->max - 1); |
| 195 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd, |
| 200 | struct ib_srq_attr *attr, struct mthca_srq *srq) |
| 201 | { |
| 202 | struct mthca_mailbox *mailbox; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 203 | int ds; |
| 204 | int err; |
| 205 | |
| 206 | /* Sanity check SRQ size before proceeding */ |
Jack Morgenstein | efaae8f | 2005-10-10 13:48:07 -0700 | [diff] [blame] | 207 | if (attr->max_wr > dev->limits.max_srq_wqes || |
Jack Morgenstein | 59fef3b | 2006-04-11 18:16:27 +0300 | [diff] [blame] | 208 | attr->max_sge > dev->limits.max_srq_sge) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 209 | return -EINVAL; |
| 210 | |
| 211 | srq->max = attr->max_wr; |
| 212 | srq->max_gs = attr->max_sge; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 213 | srq->counter = 0; |
| 214 | |
| 215 | if (mthca_is_memfree(dev)) |
| 216 | srq->max = roundup_pow_of_two(srq->max + 1); |
Michael S. Tsirkin | 2cbe19d | 2006-10-09 18:06:32 +0200 | [diff] [blame] | 217 | else |
| 218 | srq->max = srq->max + 1; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 219 | |
Jack Morgenstein | 1d7d2f6 | 2006-01-04 14:42:39 -0800 | [diff] [blame] | 220 | ds = max(64UL, |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 221 | roundup_pow_of_two(sizeof (struct mthca_next_seg) + |
| 222 | srq->max_gs * sizeof (struct mthca_data_seg))); |
Jack Morgenstein | ded9ad7 | 2006-03-20 12:35:34 +0200 | [diff] [blame] | 223 | |
Jack Morgenstein | a07bacc | 2006-03-26 17:01:12 +0200 | [diff] [blame] | 224 | if (!mthca_is_memfree(dev) && (ds > dev->limits.max_desc_sz)) |
Jack Morgenstein | ded9ad7 | 2006-03-20 12:35:34 +0200 | [diff] [blame] | 225 | return -EINVAL; |
| 226 | |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 227 | srq->wqe_shift = ilog2(ds); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 228 | |
| 229 | srq->srqn = mthca_alloc(&dev->srq_table.alloc); |
| 230 | if (srq->srqn == -1) |
| 231 | return -ENOMEM; |
| 232 | |
| 233 | if (mthca_is_memfree(dev)) { |
| 234 | err = mthca_table_get(dev, dev->srq_table.table, srq->srqn); |
| 235 | if (err) |
| 236 | goto err_out; |
| 237 | |
| 238 | if (!pd->ibpd.uobject) { |
| 239 | srq->db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SRQ, |
| 240 | srq->srqn, &srq->db); |
| 241 | if (srq->db_index < 0) { |
| 242 | err = -ENOMEM; |
| 243 | goto err_out_icm; |
| 244 | } |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 249 | if (IS_ERR(mailbox)) { |
| 250 | err = PTR_ERR(mailbox); |
| 251 | goto err_out_db; |
| 252 | } |
| 253 | |
| 254 | err = mthca_alloc_srq_buf(dev, pd, srq); |
| 255 | if (err) |
| 256 | goto err_out_mailbox; |
| 257 | |
| 258 | spin_lock_init(&srq->lock); |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 259 | srq->refcount = 1; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 260 | init_waitqueue_head(&srq->wait); |
Roland Dreier | c93b6fb | 2006-06-17 20:37:41 -0700 | [diff] [blame] | 261 | mutex_init(&srq->mutex); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 262 | |
| 263 | if (mthca_is_memfree(dev)) |
| 264 | mthca_arbel_init_srq_context(dev, pd, srq, mailbox->buf); |
| 265 | else |
| 266 | mthca_tavor_init_srq_context(dev, pd, srq, mailbox->buf); |
| 267 | |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 268 | err = mthca_SW2HW_SRQ(dev, mailbox, srq->srqn); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 269 | |
| 270 | if (err) { |
| 271 | mthca_warn(dev, "SW2HW_SRQ failed (%d)\n", err); |
| 272 | goto err_out_free_buf; |
| 273 | } |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 274 | |
| 275 | spin_lock_irq(&dev->srq_table.lock); |
| 276 | if (mthca_array_set(&dev->srq_table.srq, |
| 277 | srq->srqn & (dev->limits.num_srqs - 1), |
| 278 | srq)) { |
| 279 | spin_unlock_irq(&dev->srq_table.lock); |
| 280 | goto err_out_free_srq; |
| 281 | } |
| 282 | spin_unlock_irq(&dev->srq_table.lock); |
| 283 | |
| 284 | mthca_free_mailbox(dev, mailbox); |
| 285 | |
| 286 | srq->first_free = 0; |
| 287 | srq->last_free = srq->max - 1; |
| 288 | |
Michael S. Tsirkin | 2cbe19d | 2006-10-09 18:06:32 +0200 | [diff] [blame] | 289 | attr->max_wr = srq->max - 1; |
Dotan Barak | abb6e9b | 2006-02-23 12:13:51 -0800 | [diff] [blame] | 290 | attr->max_sge = srq->max_gs; |
| 291 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 292 | return 0; |
| 293 | |
| 294 | err_out_free_srq: |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 295 | err = mthca_HW2SW_SRQ(dev, mailbox, srq->srqn); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 296 | if (err) |
| 297 | mthca_warn(dev, "HW2SW_SRQ failed (%d)\n", err); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 298 | |
| 299 | err_out_free_buf: |
| 300 | if (!pd->ibpd.uobject) |
| 301 | mthca_free_srq_buf(dev, srq); |
| 302 | |
| 303 | err_out_mailbox: |
| 304 | mthca_free_mailbox(dev, mailbox); |
| 305 | |
| 306 | err_out_db: |
| 307 | if (!pd->ibpd.uobject && mthca_is_memfree(dev)) |
| 308 | mthca_free_db(dev, MTHCA_DB_TYPE_SRQ, srq->db_index); |
| 309 | |
| 310 | err_out_icm: |
| 311 | mthca_table_put(dev, dev->srq_table.table, srq->srqn); |
| 312 | |
| 313 | err_out: |
| 314 | mthca_free(&dev->srq_table.alloc, srq->srqn); |
| 315 | |
| 316 | return err; |
| 317 | } |
| 318 | |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 319 | static inline int get_srq_refcount(struct mthca_dev *dev, struct mthca_srq *srq) |
| 320 | { |
| 321 | int c; |
| 322 | |
| 323 | spin_lock_irq(&dev->srq_table.lock); |
| 324 | c = srq->refcount; |
| 325 | spin_unlock_irq(&dev->srq_table.lock); |
| 326 | |
| 327 | return c; |
| 328 | } |
| 329 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 330 | void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq) |
| 331 | { |
| 332 | struct mthca_mailbox *mailbox; |
| 333 | int err; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 334 | |
| 335 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 336 | if (IS_ERR(mailbox)) { |
| 337 | mthca_warn(dev, "No memory for mailbox to free SRQ.\n"); |
| 338 | return; |
| 339 | } |
| 340 | |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 341 | err = mthca_HW2SW_SRQ(dev, mailbox, srq->srqn); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 342 | if (err) |
| 343 | mthca_warn(dev, "HW2SW_SRQ failed (%d)\n", err); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 344 | |
| 345 | spin_lock_irq(&dev->srq_table.lock); |
| 346 | mthca_array_clear(&dev->srq_table.srq, |
| 347 | srq->srqn & (dev->limits.num_srqs - 1)); |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 348 | --srq->refcount; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 349 | spin_unlock_irq(&dev->srq_table.lock); |
| 350 | |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 351 | wait_event(srq->wait, !get_srq_refcount(dev, srq)); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 352 | |
| 353 | if (!srq->ibsrq.uobject) { |
| 354 | mthca_free_srq_buf(dev, srq); |
| 355 | if (mthca_is_memfree(dev)) |
| 356 | mthca_free_db(dev, MTHCA_DB_TYPE_SRQ, srq->db_index); |
| 357 | } |
| 358 | |
| 359 | mthca_table_put(dev, dev->srq_table.table, srq->srqn); |
| 360 | mthca_free(&dev->srq_table.alloc, srq->srqn); |
| 361 | mthca_free_mailbox(dev, mailbox); |
| 362 | } |
| 363 | |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 364 | int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, |
Ralph Campbell | 9bc57e2 | 2006-08-11 14:58:09 -0700 | [diff] [blame] | 365 | enum ib_srq_attr_mask attr_mask, struct ib_udata *udata) |
Roland Dreier | 2fa5e2e | 2006-02-01 13:38:24 -0800 | [diff] [blame] | 366 | { |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 367 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 368 | struct mthca_srq *srq = to_msrq(ibsrq); |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 369 | int ret = 0; |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 370 | |
| 371 | /* We don't support resizing SRQs (yet?) */ |
| 372 | if (attr_mask & IB_SRQ_MAX_WR) |
| 373 | return -EINVAL; |
| 374 | |
| 375 | if (attr_mask & IB_SRQ_LIMIT) { |
Dotan Barak | 1252c51 | 2006-07-13 11:05:49 +0300 | [diff] [blame] | 376 | u32 max_wr = mthca_is_memfree(dev) ? srq->max - 1 : srq->max; |
| 377 | if (attr->srq_limit > max_wr) |
Jack Morgenstein | d4301e2 | 2006-03-20 17:32:43 +0200 | [diff] [blame] | 378 | return -EINVAL; |
Roland Dreier | c93b6fb | 2006-06-17 20:37:41 -0700 | [diff] [blame] | 379 | |
| 380 | mutex_lock(&srq->mutex); |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 381 | ret = mthca_ARM_SRQ(dev, srq->srqn, attr->srq_limit); |
Roland Dreier | c93b6fb | 2006-06-17 20:37:41 -0700 | [diff] [blame] | 382 | mutex_unlock(&srq->mutex); |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 385 | return ret; |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 388 | int mthca_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) |
| 389 | { |
| 390 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 391 | struct mthca_srq *srq = to_msrq(ibsrq); |
| 392 | struct mthca_mailbox *mailbox; |
| 393 | struct mthca_arbel_srq_context *arbel_ctx; |
Eli Cohen | fd02e80 | 2006-03-13 14:33:01 +0200 | [diff] [blame] | 394 | struct mthca_tavor_srq_context *tavor_ctx; |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 395 | int err; |
| 396 | |
| 397 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 398 | if (IS_ERR(mailbox)) |
| 399 | return PTR_ERR(mailbox); |
| 400 | |
Goldwyn Rodrigues | cdb73db | 2011-07-07 17:20:40 +0000 | [diff] [blame] | 401 | err = mthca_QUERY_SRQ(dev, srq->srqn, mailbox); |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 402 | if (err) |
| 403 | goto out; |
| 404 | |
| 405 | if (mthca_is_memfree(dev)) { |
| 406 | arbel_ctx = mailbox->buf; |
Eli Cohen | fd02e80 | 2006-03-13 14:33:01 +0200 | [diff] [blame] | 407 | srq_attr->srq_limit = be16_to_cpu(arbel_ctx->limit_watermark); |
| 408 | } else { |
| 409 | tavor_ctx = mailbox->buf; |
| 410 | srq_attr->srq_limit = be16_to_cpu(tavor_ctx->limit_watermark); |
| 411 | } |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 412 | |
Michael S. Tsirkin | 2cbe19d | 2006-10-09 18:06:32 +0200 | [diff] [blame] | 413 | srq_attr->max_wr = srq->max - 1; |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 414 | srq_attr->max_sge = srq->max_gs; |
| 415 | |
| 416 | out: |
| 417 | mthca_free_mailbox(dev, mailbox); |
| 418 | |
| 419 | return err; |
| 420 | } |
| 421 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 422 | void mthca_srq_event(struct mthca_dev *dev, u32 srqn, |
| 423 | enum ib_event_type event_type) |
| 424 | { |
| 425 | struct mthca_srq *srq; |
| 426 | struct ib_event event; |
| 427 | |
| 428 | spin_lock(&dev->srq_table.lock); |
| 429 | srq = mthca_array_get(&dev->srq_table.srq, srqn & (dev->limits.num_srqs - 1)); |
| 430 | if (srq) |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 431 | ++srq->refcount; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 432 | spin_unlock(&dev->srq_table.lock); |
| 433 | |
| 434 | if (!srq) { |
| 435 | mthca_warn(dev, "Async event for bogus SRQ %08x\n", srqn); |
| 436 | return; |
| 437 | } |
| 438 | |
| 439 | if (!srq->ibsrq.event_handler) |
| 440 | goto out; |
| 441 | |
| 442 | event.device = &dev->ib_dev; |
| 443 | event.event = event_type; |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 444 | event.element.srq = &srq->ibsrq; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 445 | srq->ibsrq.event_handler(&event, srq->ibsrq.srq_context); |
| 446 | |
| 447 | out: |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 448 | spin_lock(&dev->srq_table.lock); |
| 449 | if (!--srq->refcount) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 450 | wake_up(&srq->wait); |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 451 | spin_unlock(&dev->srq_table.lock); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | /* |
| 455 | * This function must be called with IRQs disabled. |
| 456 | */ |
| 457 | void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr) |
| 458 | { |
| 459 | int ind; |
Eli Cohen | 1d368c5 | 2008-01-24 06:38:06 -0800 | [diff] [blame] | 460 | struct mthca_next_seg *last_free; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 461 | |
| 462 | ind = wqe_addr >> srq->wqe_shift; |
| 463 | |
| 464 | spin_lock(&srq->lock); |
| 465 | |
Eli Cohen | 1d368c5 | 2008-01-24 06:38:06 -0800 | [diff] [blame] | 466 | last_free = get_wqe(srq, srq->last_free); |
| 467 | *wqe_to_link(last_free) = ind; |
| 468 | last_free->nda_op = htonl((ind << srq->wqe_shift) | 1); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 469 | *wqe_to_link(get_wqe(srq, ind)) = -1; |
| 470 | srq->last_free = ind; |
| 471 | |
| 472 | spin_unlock(&srq->lock); |
| 473 | } |
| 474 | |
| 475 | int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, |
| 476 | struct ib_recv_wr **bad_wr) |
| 477 | { |
| 478 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 479 | struct mthca_srq *srq = to_msrq(ibsrq); |
| 480 | unsigned long flags; |
| 481 | int err = 0; |
| 482 | int first_ind; |
| 483 | int ind; |
| 484 | int next_ind; |
| 485 | int nreq; |
| 486 | int i; |
| 487 | void *wqe; |
| 488 | void *prev_wqe; |
| 489 | |
| 490 | spin_lock_irqsave(&srq->lock, flags); |
| 491 | |
| 492 | first_ind = srq->first_free; |
| 493 | |
Michael S. Tsirkin | ab28b17 | 2006-05-24 18:27:07 +0300 | [diff] [blame] | 494 | for (nreq = 0; wr; wr = wr->next) { |
Eli Cohen | 1203c42 | 2008-02-04 20:20:44 -0800 | [diff] [blame] | 495 | ind = srq->first_free; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 496 | wqe = get_wqe(srq, ind); |
| 497 | next_ind = *wqe_to_link(wqe); |
Roland Dreier | e23d6d2 | 2005-10-06 13:25:16 -0700 | [diff] [blame] | 498 | |
Eli Cohen | 55a98e9 | 2007-10-10 17:55:37 +0200 | [diff] [blame] | 499 | if (unlikely(next_ind < 0)) { |
Roland Dreier | e23d6d2 | 2005-10-06 13:25:16 -0700 | [diff] [blame] | 500 | mthca_err(dev, "SRQ %06x full\n", srq->srqn); |
| 501 | err = -ENOMEM; |
| 502 | *bad_wr = wr; |
| 503 | break; |
| 504 | } |
| 505 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 506 | prev_wqe = srq->last; |
| 507 | srq->last = wqe; |
| 508 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 509 | ((struct mthca_next_seg *) wqe)->ee_nds = 0; |
| 510 | /* flags field will always remain 0 */ |
| 511 | |
| 512 | wqe += sizeof (struct mthca_next_seg); |
| 513 | |
| 514 | if (unlikely(wr->num_sge > srq->max_gs)) { |
| 515 | err = -EINVAL; |
| 516 | *bad_wr = wr; |
| 517 | srq->last = prev_wqe; |
Roland Dreier | 3853194 | 2005-09-18 14:00:17 -0700 | [diff] [blame] | 518 | break; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | for (i = 0; i < wr->num_sge; ++i) { |
Roland Dreier | 8088545 | 2007-07-18 11:30:34 -0700 | [diff] [blame] | 522 | mthca_set_data_seg(wqe, wr->sg_list + i); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 523 | wqe += sizeof (struct mthca_data_seg); |
| 524 | } |
| 525 | |
Roland Dreier | 8088545 | 2007-07-18 11:30:34 -0700 | [diff] [blame] | 526 | if (i < srq->max_gs) |
| 527 | mthca_set_data_seg_inval(wqe); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 528 | |
Roland Dreier | d6cff02 | 2005-09-13 10:41:03 -0700 | [diff] [blame] | 529 | ((struct mthca_next_seg *) prev_wqe)->ee_nds = |
| 530 | cpu_to_be32(MTHCA_NEXT_DBD); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 531 | |
| 532 | srq->wrid[ind] = wr->wr_id; |
| 533 | srq->first_free = next_ind; |
Michael S. Tsirkin | ab28b17 | 2006-05-24 18:27:07 +0300 | [diff] [blame] | 534 | |
| 535 | ++nreq; |
| 536 | if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) { |
| 537 | nreq = 0; |
| 538 | |
Michael S. Tsirkin | ab28b17 | 2006-05-24 18:27:07 +0300 | [diff] [blame] | 539 | /* |
| 540 | * Make sure that descriptors are written |
| 541 | * before doorbell is rung. |
| 542 | */ |
| 543 | wmb(); |
| 544 | |
Roland Dreier | ab8403c | 2007-10-14 20:40:27 -0700 | [diff] [blame] | 545 | mthca_write64(first_ind << srq->wqe_shift, srq->srqn << 8, |
Michael S. Tsirkin | ab28b17 | 2006-05-24 18:27:07 +0300 | [diff] [blame] | 546 | dev->kar + MTHCA_RECEIVE_DOORBELL, |
| 547 | MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); |
| 548 | |
| 549 | first_ind = srq->first_free; |
| 550 | } |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 551 | } |
| 552 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 553 | if (likely(nreq)) { |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 554 | /* |
| 555 | * Make sure that descriptors are written before |
| 556 | * doorbell is rung. |
| 557 | */ |
| 558 | wmb(); |
| 559 | |
Roland Dreier | ab8403c | 2007-10-14 20:40:27 -0700 | [diff] [blame] | 560 | mthca_write64(first_ind << srq->wqe_shift, (srq->srqn << 8) | nreq, |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 561 | dev->kar + MTHCA_RECEIVE_DOORBELL, |
| 562 | MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); |
| 563 | } |
| 564 | |
Arthur Kepner | 1f5c23e | 2006-10-16 20:22:35 -0700 | [diff] [blame] | 565 | /* |
| 566 | * Make sure doorbells don't leak out of SRQ spinlock and |
| 567 | * reach the HCA out of order: |
| 568 | */ |
| 569 | mmiowb(); |
| 570 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 571 | spin_unlock_irqrestore(&srq->lock, flags); |
| 572 | return err; |
| 573 | } |
| 574 | |
| 575 | int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, |
| 576 | struct ib_recv_wr **bad_wr) |
| 577 | { |
| 578 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 579 | struct mthca_srq *srq = to_msrq(ibsrq); |
| 580 | unsigned long flags; |
| 581 | int err = 0; |
| 582 | int ind; |
| 583 | int next_ind; |
| 584 | int nreq; |
| 585 | int i; |
| 586 | void *wqe; |
| 587 | |
| 588 | spin_lock_irqsave(&srq->lock, flags); |
| 589 | |
| 590 | for (nreq = 0; wr; ++nreq, wr = wr->next) { |
Eli Cohen | 1203c42 | 2008-02-04 20:20:44 -0800 | [diff] [blame] | 591 | ind = srq->first_free; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 592 | wqe = get_wqe(srq, ind); |
| 593 | next_ind = *wqe_to_link(wqe); |
| 594 | |
Eli Cohen | 55a98e9 | 2007-10-10 17:55:37 +0200 | [diff] [blame] | 595 | if (unlikely(next_ind < 0)) { |
Roland Dreier | e23d6d2 | 2005-10-06 13:25:16 -0700 | [diff] [blame] | 596 | mthca_err(dev, "SRQ %06x full\n", srq->srqn); |
| 597 | err = -ENOMEM; |
| 598 | *bad_wr = wr; |
| 599 | break; |
| 600 | } |
| 601 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 602 | ((struct mthca_next_seg *) wqe)->ee_nds = 0; |
| 603 | /* flags field will always remain 0 */ |
| 604 | |
| 605 | wqe += sizeof (struct mthca_next_seg); |
| 606 | |
| 607 | if (unlikely(wr->num_sge > srq->max_gs)) { |
| 608 | err = -EINVAL; |
| 609 | *bad_wr = wr; |
Roland Dreier | 3853194 | 2005-09-18 14:00:17 -0700 | [diff] [blame] | 610 | break; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | for (i = 0; i < wr->num_sge; ++i) { |
Roland Dreier | 8088545 | 2007-07-18 11:30:34 -0700 | [diff] [blame] | 614 | mthca_set_data_seg(wqe, wr->sg_list + i); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 615 | wqe += sizeof (struct mthca_data_seg); |
| 616 | } |
| 617 | |
Roland Dreier | 8088545 | 2007-07-18 11:30:34 -0700 | [diff] [blame] | 618 | if (i < srq->max_gs) |
| 619 | mthca_set_data_seg_inval(wqe); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 620 | |
| 621 | srq->wrid[ind] = wr->wr_id; |
| 622 | srq->first_free = next_ind; |
| 623 | } |
| 624 | |
| 625 | if (likely(nreq)) { |
| 626 | srq->counter += nreq; |
| 627 | |
| 628 | /* |
| 629 | * Make sure that descriptors are written before |
| 630 | * we write doorbell record. |
| 631 | */ |
| 632 | wmb(); |
| 633 | *srq->db = cpu_to_be32(srq->counter); |
| 634 | } |
| 635 | |
| 636 | spin_unlock_irqrestore(&srq->lock, flags); |
| 637 | return err; |
| 638 | } |
| 639 | |
Jack Morgenstein | 59fef3b | 2006-04-11 18:16:27 +0300 | [diff] [blame] | 640 | int mthca_max_srq_sge(struct mthca_dev *dev) |
| 641 | { |
| 642 | if (mthca_is_memfree(dev)) |
| 643 | return dev->limits.max_sg; |
| 644 | |
| 645 | /* |
| 646 | * SRQ allocations are based on powers of 2 for Tavor, |
| 647 | * (although they only need to be multiples of 16 bytes). |
| 648 | * |
| 649 | * Therefore, we need to base the max number of sg entries on |
| 650 | * the largest power of 2 descriptor size that is <= to the |
| 651 | * actual max WQE descriptor size, rather than return the |
| 652 | * max_sg value given by the firmware (which is based on WQE |
| 653 | * sizes as multiples of 16, not powers of 2). |
| 654 | * |
| 655 | * If SRQ implementation is changed for Tavor to be based on |
| 656 | * multiples of 16, the calculation below can be deleted and |
| 657 | * the FW max_sg value returned. |
| 658 | */ |
| 659 | return min_t(int, dev->limits.max_sg, |
| 660 | ((1 << (fls(dev->limits.max_desc_sz) - 1)) - |
| 661 | sizeof (struct mthca_next_seg)) / |
| 662 | sizeof (struct mthca_data_seg)); |
| 663 | } |
| 664 | |
Roland Dreier | f4f3d0f | 2006-11-29 15:33:06 -0800 | [diff] [blame] | 665 | int mthca_init_srq_table(struct mthca_dev *dev) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 666 | { |
| 667 | int err; |
| 668 | |
| 669 | if (!(dev->mthca_flags & MTHCA_FLAG_SRQ)) |
| 670 | return 0; |
| 671 | |
| 672 | spin_lock_init(&dev->srq_table.lock); |
| 673 | |
| 674 | err = mthca_alloc_init(&dev->srq_table.alloc, |
| 675 | dev->limits.num_srqs, |
| 676 | dev->limits.num_srqs - 1, |
| 677 | dev->limits.reserved_srqs); |
| 678 | if (err) |
| 679 | return err; |
| 680 | |
| 681 | err = mthca_array_init(&dev->srq_table.srq, |
| 682 | dev->limits.num_srqs); |
| 683 | if (err) |
| 684 | mthca_alloc_cleanup(&dev->srq_table.alloc); |
| 685 | |
| 686 | return err; |
| 687 | } |
| 688 | |
Roland Dreier | e1f7868 | 2006-03-29 09:36:46 -0800 | [diff] [blame] | 689 | void mthca_cleanup_srq_table(struct mthca_dev *dev) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 690 | { |
| 691 | if (!(dev->mthca_flags & MTHCA_FLAG_SRQ)) |
| 692 | return; |
| 693 | |
| 694 | mthca_array_cleanup(&dev->srq_table.srq, dev->limits.num_srqs); |
| 695 | mthca_alloc_cleanup(&dev->srq_table.alloc); |
| 696 | } |