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. |
| 31 | * |
| 32 | * $Id: mthca_srq.c 3047 2005-08-10 03:59:35Z roland $ |
| 33 | */ |
| 34 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 35 | #include <linux/slab.h> |
| 36 | #include <linux/string.h> |
| 37 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 38 | #include "mthca_dev.h" |
| 39 | #include "mthca_cmd.h" |
| 40 | #include "mthca_memfree.h" |
| 41 | #include "mthca_wqe.h" |
| 42 | |
| 43 | enum { |
| 44 | MTHCA_MAX_DIRECT_SRQ_SIZE = 4 * PAGE_SIZE |
| 45 | }; |
| 46 | |
| 47 | struct mthca_tavor_srq_context { |
| 48 | __be64 wqe_base_ds; /* low 6 bits is descriptor size */ |
| 49 | __be32 state_pd; |
| 50 | __be32 lkey; |
| 51 | __be32 uar; |
Eli Cohen | fd02e80 | 2006-03-13 14:33:01 +0200 | [diff] [blame] | 52 | __be16 limit_watermark; |
| 53 | __be16 wqe_cnt; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 54 | u32 reserved[2]; |
| 55 | }; |
| 56 | |
| 57 | struct mthca_arbel_srq_context { |
| 58 | __be32 state_logsize_srqn; |
| 59 | __be32 lkey; |
| 60 | __be32 db_index; |
| 61 | __be32 logstride_usrpage; |
| 62 | __be64 wqe_base; |
| 63 | __be32 eq_pd; |
| 64 | __be16 limit_watermark; |
| 65 | __be16 wqe_cnt; |
| 66 | u16 reserved1; |
| 67 | __be16 wqe_counter; |
| 68 | u32 reserved2[3]; |
| 69 | }; |
| 70 | |
| 71 | static void *get_wqe(struct mthca_srq *srq, int n) |
| 72 | { |
| 73 | if (srq->is_direct) |
| 74 | return srq->queue.direct.buf + (n << srq->wqe_shift); |
| 75 | else |
| 76 | return srq->queue.page_list[(n << srq->wqe_shift) >> PAGE_SHIFT].buf + |
| 77 | ((n << srq->wqe_shift) & (PAGE_SIZE - 1)); |
| 78 | } |
| 79 | |
| 80 | /* |
| 81 | * 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] | 82 | * link when the WQE is in the free list. We use the imm field |
| 83 | * because in the Tavor case, posting a WQE may overwrite the next |
| 84 | * segment of the previous WQE, but a receive WQE will never touch the |
| 85 | * imm field. This avoids corrupting our free list if the previous |
| 86 | * WQE has already completed and been put on the free list when we |
| 87 | * post the next WQE. |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 88 | */ |
| 89 | static inline int *wqe_to_link(void *wqe) |
| 90 | { |
Roland Dreier | e5b251a | 2005-10-30 13:07:03 -0800 | [diff] [blame] | 91 | return (int *) (wqe + offsetof(struct mthca_next_seg, imm)); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | static void mthca_tavor_init_srq_context(struct mthca_dev *dev, |
| 95 | struct mthca_pd *pd, |
| 96 | struct mthca_srq *srq, |
| 97 | struct mthca_tavor_srq_context *context) |
| 98 | { |
| 99 | memset(context, 0, sizeof *context); |
| 100 | |
| 101 | context->wqe_base_ds = cpu_to_be64(1 << (srq->wqe_shift - 4)); |
| 102 | context->state_pd = cpu_to_be32(pd->pd_num); |
| 103 | context->lkey = cpu_to_be32(srq->mr.ibmr.lkey); |
| 104 | |
| 105 | if (pd->ibpd.uobject) |
| 106 | context->uar = |
| 107 | cpu_to_be32(to_mucontext(pd->ibpd.uobject->context)->uar.index); |
| 108 | else |
| 109 | context->uar = cpu_to_be32(dev->driver_uar.index); |
| 110 | } |
| 111 | |
| 112 | static void mthca_arbel_init_srq_context(struct mthca_dev *dev, |
| 113 | struct mthca_pd *pd, |
| 114 | struct mthca_srq *srq, |
| 115 | struct mthca_arbel_srq_context *context) |
| 116 | { |
| 117 | int logsize; |
| 118 | |
| 119 | memset(context, 0, sizeof *context); |
| 120 | |
| 121 | logsize = long_log2(srq->max) + srq->wqe_shift; |
| 122 | context->state_logsize_srqn = cpu_to_be32(logsize << 24 | srq->srqn); |
| 123 | context->lkey = cpu_to_be32(srq->mr.ibmr.lkey); |
| 124 | context->db_index = cpu_to_be32(srq->db_index); |
| 125 | context->logstride_usrpage = cpu_to_be32((srq->wqe_shift - 4) << 29); |
| 126 | if (pd->ibpd.uobject) |
| 127 | context->logstride_usrpage |= |
| 128 | cpu_to_be32(to_mucontext(pd->ibpd.uobject->context)->uar.index); |
| 129 | else |
| 130 | context->logstride_usrpage |= cpu_to_be32(dev->driver_uar.index); |
| 131 | context->eq_pd = cpu_to_be32(MTHCA_EQ_ASYNC << 24 | pd->pd_num); |
| 132 | } |
| 133 | |
| 134 | static void mthca_free_srq_buf(struct mthca_dev *dev, struct mthca_srq *srq) |
| 135 | { |
| 136 | mthca_buf_free(dev, srq->max << srq->wqe_shift, &srq->queue, |
| 137 | srq->is_direct, &srq->mr); |
| 138 | kfree(srq->wrid); |
| 139 | } |
| 140 | |
| 141 | static int mthca_alloc_srq_buf(struct mthca_dev *dev, struct mthca_pd *pd, |
| 142 | struct mthca_srq *srq) |
| 143 | { |
| 144 | struct mthca_data_seg *scatter; |
| 145 | void *wqe; |
| 146 | int err; |
| 147 | int i; |
| 148 | |
| 149 | if (pd->ibpd.uobject) |
| 150 | return 0; |
| 151 | |
| 152 | srq->wrid = kmalloc(srq->max * sizeof (u64), GFP_KERNEL); |
| 153 | if (!srq->wrid) |
| 154 | return -ENOMEM; |
| 155 | |
| 156 | err = mthca_buf_alloc(dev, srq->max << srq->wqe_shift, |
| 157 | MTHCA_MAX_DIRECT_SRQ_SIZE, |
| 158 | &srq->queue, &srq->is_direct, pd, 1, &srq->mr); |
| 159 | if (err) { |
| 160 | kfree(srq->wrid); |
| 161 | return err; |
| 162 | } |
| 163 | |
| 164 | /* |
| 165 | * Now initialize the SRQ buffer so that all of the WQEs are |
| 166 | * linked into the list of free WQEs. In addition, set the |
| 167 | * scatter list L_Keys to the sentry value of 0x100. |
| 168 | */ |
| 169 | for (i = 0; i < srq->max; ++i) { |
| 170 | wqe = get_wqe(srq, i); |
| 171 | |
| 172 | *wqe_to_link(wqe) = i < srq->max - 1 ? i + 1 : -1; |
| 173 | |
| 174 | for (scatter = wqe + sizeof (struct mthca_next_seg); |
| 175 | (void *) scatter < wqe + (1 << srq->wqe_shift); |
| 176 | ++scatter) |
| 177 | scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); |
| 178 | } |
| 179 | |
Roland Dreier | 6577ae5 | 2005-09-19 09:17:56 -0700 | [diff] [blame] | 180 | srq->last = get_wqe(srq, srq->max - 1); |
| 181 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd, |
| 186 | struct ib_srq_attr *attr, struct mthca_srq *srq) |
| 187 | { |
| 188 | struct mthca_mailbox *mailbox; |
| 189 | u8 status; |
| 190 | int ds; |
| 191 | int err; |
| 192 | |
| 193 | /* Sanity check SRQ size before proceeding */ |
Jack Morgenstein | efaae8f | 2005-10-10 13:48:07 -0700 | [diff] [blame] | 194 | if (attr->max_wr > dev->limits.max_srq_wqes || |
Jack Morgenstein | 59fef3b | 2006-04-11 18:16:27 +0300 | [diff] [blame] | 195 | attr->max_sge > dev->limits.max_srq_sge) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 196 | return -EINVAL; |
| 197 | |
| 198 | srq->max = attr->max_wr; |
| 199 | srq->max_gs = attr->max_sge; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 200 | srq->counter = 0; |
| 201 | |
| 202 | if (mthca_is_memfree(dev)) |
| 203 | srq->max = roundup_pow_of_two(srq->max + 1); |
| 204 | |
Jack Morgenstein | 1d7d2f6 | 2006-01-04 14:42:39 -0800 | [diff] [blame] | 205 | ds = max(64UL, |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 206 | roundup_pow_of_two(sizeof (struct mthca_next_seg) + |
| 207 | srq->max_gs * sizeof (struct mthca_data_seg))); |
Jack Morgenstein | ded9ad7 | 2006-03-20 12:35:34 +0200 | [diff] [blame] | 208 | |
Jack Morgenstein | a07bacc | 2006-03-26 17:01:12 +0200 | [diff] [blame] | 209 | if (!mthca_is_memfree(dev) && (ds > dev->limits.max_desc_sz)) |
Jack Morgenstein | ded9ad7 | 2006-03-20 12:35:34 +0200 | [diff] [blame] | 210 | return -EINVAL; |
| 211 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 212 | srq->wqe_shift = long_log2(ds); |
| 213 | |
| 214 | srq->srqn = mthca_alloc(&dev->srq_table.alloc); |
| 215 | if (srq->srqn == -1) |
| 216 | return -ENOMEM; |
| 217 | |
| 218 | if (mthca_is_memfree(dev)) { |
| 219 | err = mthca_table_get(dev, dev->srq_table.table, srq->srqn); |
| 220 | if (err) |
| 221 | goto err_out; |
| 222 | |
| 223 | if (!pd->ibpd.uobject) { |
| 224 | srq->db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SRQ, |
| 225 | srq->srqn, &srq->db); |
| 226 | if (srq->db_index < 0) { |
| 227 | err = -ENOMEM; |
| 228 | goto err_out_icm; |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 234 | if (IS_ERR(mailbox)) { |
| 235 | err = PTR_ERR(mailbox); |
| 236 | goto err_out_db; |
| 237 | } |
| 238 | |
| 239 | err = mthca_alloc_srq_buf(dev, pd, srq); |
| 240 | if (err) |
| 241 | goto err_out_mailbox; |
| 242 | |
| 243 | spin_lock_init(&srq->lock); |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 244 | srq->refcount = 1; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 245 | init_waitqueue_head(&srq->wait); |
| 246 | |
| 247 | if (mthca_is_memfree(dev)) |
| 248 | mthca_arbel_init_srq_context(dev, pd, srq, mailbox->buf); |
| 249 | else |
| 250 | mthca_tavor_init_srq_context(dev, pd, srq, mailbox->buf); |
| 251 | |
| 252 | err = mthca_SW2HW_SRQ(dev, mailbox, srq->srqn, &status); |
| 253 | |
| 254 | if (err) { |
| 255 | mthca_warn(dev, "SW2HW_SRQ failed (%d)\n", err); |
| 256 | goto err_out_free_buf; |
| 257 | } |
| 258 | if (status) { |
| 259 | mthca_warn(dev, "SW2HW_SRQ returned status 0x%02x\n", |
| 260 | status); |
| 261 | err = -EINVAL; |
| 262 | goto err_out_free_buf; |
| 263 | } |
| 264 | |
| 265 | spin_lock_irq(&dev->srq_table.lock); |
| 266 | if (mthca_array_set(&dev->srq_table.srq, |
| 267 | srq->srqn & (dev->limits.num_srqs - 1), |
| 268 | srq)) { |
| 269 | spin_unlock_irq(&dev->srq_table.lock); |
| 270 | goto err_out_free_srq; |
| 271 | } |
| 272 | spin_unlock_irq(&dev->srq_table.lock); |
| 273 | |
| 274 | mthca_free_mailbox(dev, mailbox); |
| 275 | |
| 276 | srq->first_free = 0; |
| 277 | srq->last_free = srq->max - 1; |
| 278 | |
Dotan Barak | e10e271 | 2006-03-20 10:08:26 -0800 | [diff] [blame] | 279 | attr->max_wr = (mthca_is_memfree(dev)) ? srq->max - 1 : srq->max; |
Dotan Barak | abb6e9b | 2006-02-23 12:13:51 -0800 | [diff] [blame] | 280 | attr->max_sge = srq->max_gs; |
| 281 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 282 | return 0; |
| 283 | |
| 284 | err_out_free_srq: |
| 285 | err = mthca_HW2SW_SRQ(dev, mailbox, srq->srqn, &status); |
| 286 | if (err) |
| 287 | mthca_warn(dev, "HW2SW_SRQ failed (%d)\n", err); |
| 288 | else if (status) |
| 289 | mthca_warn(dev, "HW2SW_SRQ returned status 0x%02x\n", status); |
| 290 | |
| 291 | err_out_free_buf: |
| 292 | if (!pd->ibpd.uobject) |
| 293 | mthca_free_srq_buf(dev, srq); |
| 294 | |
| 295 | err_out_mailbox: |
| 296 | mthca_free_mailbox(dev, mailbox); |
| 297 | |
| 298 | err_out_db: |
| 299 | if (!pd->ibpd.uobject && mthca_is_memfree(dev)) |
| 300 | mthca_free_db(dev, MTHCA_DB_TYPE_SRQ, srq->db_index); |
| 301 | |
| 302 | err_out_icm: |
| 303 | mthca_table_put(dev, dev->srq_table.table, srq->srqn); |
| 304 | |
| 305 | err_out: |
| 306 | mthca_free(&dev->srq_table.alloc, srq->srqn); |
| 307 | |
| 308 | return err; |
| 309 | } |
| 310 | |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 311 | static inline int get_srq_refcount(struct mthca_dev *dev, struct mthca_srq *srq) |
| 312 | { |
| 313 | int c; |
| 314 | |
| 315 | spin_lock_irq(&dev->srq_table.lock); |
| 316 | c = srq->refcount; |
| 317 | spin_unlock_irq(&dev->srq_table.lock); |
| 318 | |
| 319 | return c; |
| 320 | } |
| 321 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 322 | void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq) |
| 323 | { |
| 324 | struct mthca_mailbox *mailbox; |
| 325 | int err; |
| 326 | u8 status; |
| 327 | |
| 328 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 329 | if (IS_ERR(mailbox)) { |
| 330 | mthca_warn(dev, "No memory for mailbox to free SRQ.\n"); |
| 331 | return; |
| 332 | } |
| 333 | |
| 334 | err = mthca_HW2SW_SRQ(dev, mailbox, srq->srqn, &status); |
| 335 | if (err) |
| 336 | mthca_warn(dev, "HW2SW_SRQ failed (%d)\n", err); |
| 337 | else if (status) |
| 338 | mthca_warn(dev, "HW2SW_SRQ returned status 0x%02x\n", status); |
| 339 | |
| 340 | spin_lock_irq(&dev->srq_table.lock); |
| 341 | mthca_array_clear(&dev->srq_table.srq, |
| 342 | srq->srqn & (dev->limits.num_srqs - 1)); |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 343 | --srq->refcount; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 344 | spin_unlock_irq(&dev->srq_table.lock); |
| 345 | |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 346 | wait_event(srq->wait, !get_srq_refcount(dev, srq)); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 347 | |
| 348 | if (!srq->ibsrq.uobject) { |
| 349 | mthca_free_srq_buf(dev, srq); |
| 350 | if (mthca_is_memfree(dev)) |
| 351 | mthca_free_db(dev, MTHCA_DB_TYPE_SRQ, srq->db_index); |
| 352 | } |
| 353 | |
| 354 | mthca_table_put(dev, dev->srq_table.table, srq->srqn); |
| 355 | mthca_free(&dev->srq_table.alloc, srq->srqn); |
| 356 | mthca_free_mailbox(dev, mailbox); |
| 357 | } |
| 358 | |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 359 | int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, |
| 360 | enum ib_srq_attr_mask attr_mask) |
Roland Dreier | 2fa5e2e | 2006-02-01 13:38:24 -0800 | [diff] [blame] | 361 | { |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 362 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 363 | struct mthca_srq *srq = to_msrq(ibsrq); |
| 364 | int ret; |
| 365 | u8 status; |
| 366 | |
| 367 | /* We don't support resizing SRQs (yet?) */ |
| 368 | if (attr_mask & IB_SRQ_MAX_WR) |
| 369 | return -EINVAL; |
| 370 | |
| 371 | if (attr_mask & IB_SRQ_LIMIT) { |
Jack Morgenstein | d4301e2 | 2006-03-20 17:32:43 +0200 | [diff] [blame] | 372 | if (attr->srq_limit > srq->max) |
| 373 | return -EINVAL; |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 374 | ret = mthca_ARM_SRQ(dev, srq->srqn, attr->srq_limit, &status); |
| 375 | if (ret) |
| 376 | return ret; |
| 377 | if (status) |
| 378 | return -EINVAL; |
| 379 | } |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 384 | int mthca_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) |
| 385 | { |
| 386 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 387 | struct mthca_srq *srq = to_msrq(ibsrq); |
| 388 | struct mthca_mailbox *mailbox; |
| 389 | struct mthca_arbel_srq_context *arbel_ctx; |
Eli Cohen | fd02e80 | 2006-03-13 14:33:01 +0200 | [diff] [blame] | 390 | struct mthca_tavor_srq_context *tavor_ctx; |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 391 | u8 status; |
| 392 | int err; |
| 393 | |
| 394 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 395 | if (IS_ERR(mailbox)) |
| 396 | return PTR_ERR(mailbox); |
| 397 | |
| 398 | err = mthca_QUERY_SRQ(dev, srq->srqn, mailbox, &status); |
| 399 | if (err) |
| 400 | goto out; |
| 401 | |
| 402 | if (mthca_is_memfree(dev)) { |
| 403 | arbel_ctx = mailbox->buf; |
Eli Cohen | fd02e80 | 2006-03-13 14:33:01 +0200 | [diff] [blame] | 404 | srq_attr->srq_limit = be16_to_cpu(arbel_ctx->limit_watermark); |
| 405 | } else { |
| 406 | tavor_ctx = mailbox->buf; |
| 407 | srq_attr->srq_limit = be16_to_cpu(tavor_ctx->limit_watermark); |
| 408 | } |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 409 | |
Dotan Barak | e10e271 | 2006-03-20 10:08:26 -0800 | [diff] [blame] | 410 | srq_attr->max_wr = (mthca_is_memfree(dev)) ? srq->max - 1 : srq->max; |
Eli Cohen | 8ebe507 | 2006-02-13 16:40:21 -0800 | [diff] [blame] | 411 | srq_attr->max_sge = srq->max_gs; |
| 412 | |
| 413 | out: |
| 414 | mthca_free_mailbox(dev, mailbox); |
| 415 | |
| 416 | return err; |
| 417 | } |
| 418 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 419 | void mthca_srq_event(struct mthca_dev *dev, u32 srqn, |
| 420 | enum ib_event_type event_type) |
| 421 | { |
| 422 | struct mthca_srq *srq; |
| 423 | struct ib_event event; |
| 424 | |
| 425 | spin_lock(&dev->srq_table.lock); |
| 426 | srq = mthca_array_get(&dev->srq_table.srq, srqn & (dev->limits.num_srqs - 1)); |
| 427 | if (srq) |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 428 | ++srq->refcount; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 429 | spin_unlock(&dev->srq_table.lock); |
| 430 | |
| 431 | if (!srq) { |
| 432 | mthca_warn(dev, "Async event for bogus SRQ %08x\n", srqn); |
| 433 | return; |
| 434 | } |
| 435 | |
| 436 | if (!srq->ibsrq.event_handler) |
| 437 | goto out; |
| 438 | |
| 439 | event.device = &dev->ib_dev; |
| 440 | event.event = event_type; |
Roland Dreier | 90f104d | 2005-10-06 13:15:56 -0700 | [diff] [blame] | 441 | event.element.srq = &srq->ibsrq; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 442 | srq->ibsrq.event_handler(&event, srq->ibsrq.srq_context); |
| 443 | |
| 444 | out: |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 445 | spin_lock(&dev->srq_table.lock); |
| 446 | if (!--srq->refcount) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 447 | wake_up(&srq->wait); |
Roland Dreier | a3285aa | 2006-05-09 10:50:29 -0700 | [diff] [blame] | 448 | spin_unlock(&dev->srq_table.lock); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | /* |
| 452 | * This function must be called with IRQs disabled. |
| 453 | */ |
| 454 | void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr) |
| 455 | { |
| 456 | int ind; |
| 457 | |
| 458 | ind = wqe_addr >> srq->wqe_shift; |
| 459 | |
| 460 | spin_lock(&srq->lock); |
| 461 | |
| 462 | if (likely(srq->first_free >= 0)) |
| 463 | *wqe_to_link(get_wqe(srq, srq->last_free)) = ind; |
| 464 | else |
| 465 | srq->first_free = ind; |
| 466 | |
| 467 | *wqe_to_link(get_wqe(srq, ind)) = -1; |
| 468 | srq->last_free = ind; |
| 469 | |
| 470 | spin_unlock(&srq->lock); |
| 471 | } |
| 472 | |
| 473 | int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, |
| 474 | struct ib_recv_wr **bad_wr) |
| 475 | { |
| 476 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 477 | struct mthca_srq *srq = to_msrq(ibsrq); |
Michael S. Tsirkin | ae57e24 | 2005-11-09 14:59:57 -0800 | [diff] [blame] | 478 | __be32 doorbell[2]; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 479 | unsigned long flags; |
| 480 | int err = 0; |
| 481 | int first_ind; |
| 482 | int ind; |
| 483 | int next_ind; |
| 484 | int nreq; |
| 485 | int i; |
| 486 | void *wqe; |
| 487 | void *prev_wqe; |
| 488 | |
| 489 | spin_lock_irqsave(&srq->lock, flags); |
| 490 | |
| 491 | first_ind = srq->first_free; |
| 492 | |
Michael S. Tsirkin | ab28b17 | 2006-05-24 18:27:07 +0300 | [diff] [blame] | 493 | for (nreq = 0; wr; wr = wr->next) { |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 494 | ind = srq->first_free; |
| 495 | |
| 496 | if (ind < 0) { |
| 497 | mthca_err(dev, "SRQ %06x full\n", srq->srqn); |
| 498 | err = -ENOMEM; |
| 499 | *bad_wr = wr; |
Roland Dreier | 3853194 | 2005-09-18 14:00:17 -0700 | [diff] [blame] | 500 | break; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | wqe = get_wqe(srq, ind); |
| 504 | next_ind = *wqe_to_link(wqe); |
Roland Dreier | e23d6d2 | 2005-10-06 13:25:16 -0700 | [diff] [blame] | 505 | |
| 506 | if (next_ind < 0) { |
| 507 | mthca_err(dev, "SRQ %06x full\n", srq->srqn); |
| 508 | err = -ENOMEM; |
| 509 | *bad_wr = wr; |
| 510 | break; |
| 511 | } |
| 512 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 513 | prev_wqe = srq->last; |
| 514 | srq->last = wqe; |
| 515 | |
| 516 | ((struct mthca_next_seg *) wqe)->nda_op = 0; |
| 517 | ((struct mthca_next_seg *) wqe)->ee_nds = 0; |
| 518 | /* flags field will always remain 0 */ |
| 519 | |
| 520 | wqe += sizeof (struct mthca_next_seg); |
| 521 | |
| 522 | if (unlikely(wr->num_sge > srq->max_gs)) { |
| 523 | err = -EINVAL; |
| 524 | *bad_wr = wr; |
| 525 | srq->last = prev_wqe; |
Roland Dreier | 3853194 | 2005-09-18 14:00:17 -0700 | [diff] [blame] | 526 | break; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | for (i = 0; i < wr->num_sge; ++i) { |
| 530 | ((struct mthca_data_seg *) wqe)->byte_count = |
| 531 | cpu_to_be32(wr->sg_list[i].length); |
| 532 | ((struct mthca_data_seg *) wqe)->lkey = |
| 533 | cpu_to_be32(wr->sg_list[i].lkey); |
| 534 | ((struct mthca_data_seg *) wqe)->addr = |
| 535 | cpu_to_be64(wr->sg_list[i].addr); |
| 536 | wqe += sizeof (struct mthca_data_seg); |
| 537 | } |
| 538 | |
| 539 | if (i < srq->max_gs) { |
| 540 | ((struct mthca_data_seg *) wqe)->byte_count = 0; |
| 541 | ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); |
| 542 | ((struct mthca_data_seg *) wqe)->addr = 0; |
| 543 | } |
| 544 | |
Roland Dreier | d6cff02 | 2005-09-13 10:41:03 -0700 | [diff] [blame] | 545 | ((struct mthca_next_seg *) prev_wqe)->nda_op = |
| 546 | cpu_to_be32((ind << srq->wqe_shift) | 1); |
| 547 | wmb(); |
| 548 | ((struct mthca_next_seg *) prev_wqe)->ee_nds = |
| 549 | cpu_to_be32(MTHCA_NEXT_DBD); |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 550 | |
| 551 | srq->wrid[ind] = wr->wr_id; |
| 552 | srq->first_free = next_ind; |
Michael S. Tsirkin | ab28b17 | 2006-05-24 18:27:07 +0300 | [diff] [blame] | 553 | |
| 554 | ++nreq; |
| 555 | if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) { |
| 556 | nreq = 0; |
| 557 | |
| 558 | doorbell[0] = cpu_to_be32(first_ind << srq->wqe_shift); |
| 559 | doorbell[1] = cpu_to_be32(srq->srqn << 8); |
| 560 | |
| 561 | /* |
| 562 | * Make sure that descriptors are written |
| 563 | * before doorbell is rung. |
| 564 | */ |
| 565 | wmb(); |
| 566 | |
| 567 | mthca_write64(doorbell, |
| 568 | dev->kar + MTHCA_RECEIVE_DOORBELL, |
| 569 | MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); |
| 570 | |
| 571 | first_ind = srq->first_free; |
| 572 | } |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 573 | } |
| 574 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 575 | if (likely(nreq)) { |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 576 | doorbell[0] = cpu_to_be32(first_ind << srq->wqe_shift); |
| 577 | doorbell[1] = cpu_to_be32((srq->srqn << 8) | nreq); |
| 578 | |
| 579 | /* |
| 580 | * Make sure that descriptors are written before |
| 581 | * doorbell is rung. |
| 582 | */ |
| 583 | wmb(); |
| 584 | |
| 585 | mthca_write64(doorbell, |
| 586 | dev->kar + MTHCA_RECEIVE_DOORBELL, |
| 587 | MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); |
| 588 | } |
| 589 | |
| 590 | spin_unlock_irqrestore(&srq->lock, flags); |
| 591 | return err; |
| 592 | } |
| 593 | |
| 594 | int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, |
| 595 | struct ib_recv_wr **bad_wr) |
| 596 | { |
| 597 | struct mthca_dev *dev = to_mdev(ibsrq->device); |
| 598 | struct mthca_srq *srq = to_msrq(ibsrq); |
| 599 | unsigned long flags; |
| 600 | int err = 0; |
| 601 | int ind; |
| 602 | int next_ind; |
| 603 | int nreq; |
| 604 | int i; |
| 605 | void *wqe; |
| 606 | |
| 607 | spin_lock_irqsave(&srq->lock, flags); |
| 608 | |
| 609 | for (nreq = 0; wr; ++nreq, wr = wr->next) { |
| 610 | ind = srq->first_free; |
| 611 | |
| 612 | if (ind < 0) { |
| 613 | mthca_err(dev, "SRQ %06x full\n", srq->srqn); |
| 614 | err = -ENOMEM; |
| 615 | *bad_wr = wr; |
Roland Dreier | 3853194 | 2005-09-18 14:00:17 -0700 | [diff] [blame] | 616 | break; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | wqe = get_wqe(srq, ind); |
| 620 | next_ind = *wqe_to_link(wqe); |
| 621 | |
Roland Dreier | e23d6d2 | 2005-10-06 13:25:16 -0700 | [diff] [blame] | 622 | if (next_ind < 0) { |
| 623 | mthca_err(dev, "SRQ %06x full\n", srq->srqn); |
| 624 | err = -ENOMEM; |
| 625 | *bad_wr = wr; |
| 626 | break; |
| 627 | } |
| 628 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 629 | ((struct mthca_next_seg *) wqe)->nda_op = |
| 630 | cpu_to_be32((next_ind << srq->wqe_shift) | 1); |
| 631 | ((struct mthca_next_seg *) wqe)->ee_nds = 0; |
| 632 | /* flags field will always remain 0 */ |
| 633 | |
| 634 | wqe += sizeof (struct mthca_next_seg); |
| 635 | |
| 636 | if (unlikely(wr->num_sge > srq->max_gs)) { |
| 637 | err = -EINVAL; |
| 638 | *bad_wr = wr; |
Roland Dreier | 3853194 | 2005-09-18 14:00:17 -0700 | [diff] [blame] | 639 | break; |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | for (i = 0; i < wr->num_sge; ++i) { |
| 643 | ((struct mthca_data_seg *) wqe)->byte_count = |
| 644 | cpu_to_be32(wr->sg_list[i].length); |
| 645 | ((struct mthca_data_seg *) wqe)->lkey = |
| 646 | cpu_to_be32(wr->sg_list[i].lkey); |
| 647 | ((struct mthca_data_seg *) wqe)->addr = |
| 648 | cpu_to_be64(wr->sg_list[i].addr); |
| 649 | wqe += sizeof (struct mthca_data_seg); |
| 650 | } |
| 651 | |
| 652 | if (i < srq->max_gs) { |
| 653 | ((struct mthca_data_seg *) wqe)->byte_count = 0; |
| 654 | ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); |
| 655 | ((struct mthca_data_seg *) wqe)->addr = 0; |
| 656 | } |
| 657 | |
| 658 | srq->wrid[ind] = wr->wr_id; |
| 659 | srq->first_free = next_ind; |
| 660 | } |
| 661 | |
| 662 | if (likely(nreq)) { |
| 663 | srq->counter += nreq; |
| 664 | |
| 665 | /* |
| 666 | * Make sure that descriptors are written before |
| 667 | * we write doorbell record. |
| 668 | */ |
| 669 | wmb(); |
| 670 | *srq->db = cpu_to_be32(srq->counter); |
| 671 | } |
| 672 | |
| 673 | spin_unlock_irqrestore(&srq->lock, flags); |
| 674 | return err; |
| 675 | } |
| 676 | |
Jack Morgenstein | 59fef3b | 2006-04-11 18:16:27 +0300 | [diff] [blame] | 677 | int mthca_max_srq_sge(struct mthca_dev *dev) |
| 678 | { |
| 679 | if (mthca_is_memfree(dev)) |
| 680 | return dev->limits.max_sg; |
| 681 | |
| 682 | /* |
| 683 | * SRQ allocations are based on powers of 2 for Tavor, |
| 684 | * (although they only need to be multiples of 16 bytes). |
| 685 | * |
| 686 | * Therefore, we need to base the max number of sg entries on |
| 687 | * the largest power of 2 descriptor size that is <= to the |
| 688 | * actual max WQE descriptor size, rather than return the |
| 689 | * max_sg value given by the firmware (which is based on WQE |
| 690 | * sizes as multiples of 16, not powers of 2). |
| 691 | * |
| 692 | * If SRQ implementation is changed for Tavor to be based on |
| 693 | * multiples of 16, the calculation below can be deleted and |
| 694 | * the FW max_sg value returned. |
| 695 | */ |
| 696 | return min_t(int, dev->limits.max_sg, |
| 697 | ((1 << (fls(dev->limits.max_desc_sz) - 1)) - |
| 698 | sizeof (struct mthca_next_seg)) / |
| 699 | sizeof (struct mthca_data_seg)); |
| 700 | } |
| 701 | |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 702 | int __devinit mthca_init_srq_table(struct mthca_dev *dev) |
| 703 | { |
| 704 | int err; |
| 705 | |
| 706 | if (!(dev->mthca_flags & MTHCA_FLAG_SRQ)) |
| 707 | return 0; |
| 708 | |
| 709 | spin_lock_init(&dev->srq_table.lock); |
| 710 | |
| 711 | err = mthca_alloc_init(&dev->srq_table.alloc, |
| 712 | dev->limits.num_srqs, |
| 713 | dev->limits.num_srqs - 1, |
| 714 | dev->limits.reserved_srqs); |
| 715 | if (err) |
| 716 | return err; |
| 717 | |
| 718 | err = mthca_array_init(&dev->srq_table.srq, |
| 719 | dev->limits.num_srqs); |
| 720 | if (err) |
| 721 | mthca_alloc_cleanup(&dev->srq_table.alloc); |
| 722 | |
| 723 | return err; |
| 724 | } |
| 725 | |
Roland Dreier | e1f7868 | 2006-03-29 09:36:46 -0800 | [diff] [blame] | 726 | void mthca_cleanup_srq_table(struct mthca_dev *dev) |
Roland Dreier | ec34a92 | 2005-08-19 10:59:31 -0700 | [diff] [blame] | 727 | { |
| 728 | if (!(dev->mthca_flags & MTHCA_FLAG_SRQ)) |
| 729 | return; |
| 730 | |
| 731 | mthca_array_cleanup(&dev->srq_table.srq, dev->limits.num_srqs); |
| 732 | mthca_alloc_cleanup(&dev->srq_table.alloc); |
| 733 | } |