drivers/net/ethernet/qlogic/qed/qed_ooo.c

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   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
  33 #include <linux/types.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/kernel.h>
  36 #include <linux/list.h>
  37 #include <linux/pci.h>
  38 #include <linux/slab.h>
  39 #include <linux/string.h>
  40 #include "qed.h"
  41 #include "qed_iscsi.h"
  42 #include "qed_ll2.h"
  43 #include "qed_ooo.h"
  44 #include "qed_cxt.h"
  45
  46 static struct qed_ooo_archipelago
  47 *qed_ooo_seek_archipelago(struct qed_hwfn *p_hwfn,
  48                           struct qed_ooo_info
  49                           *p_ooo_info,
  50                           u32 cid)
  51 {
  52         u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
  53         struct qed_ooo_archipelago *p_archipelago;
  54
  55         if (idx >= p_ooo_info->max_num_archipelagos)
  56                 return NULL;
  57
  58         p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
  59
  60         if (list_empty(&p_archipelago->isles_list))
  61                 return NULL;
  62
  63         return p_archipelago;
  64 }
  65
  66 static struct qed_ooo_isle *qed_ooo_seek_isle(struct qed_hwfn *p_hwfn,
  67                                               struct qed_ooo_info *p_ooo_info,
  68                                               u32 cid, u8 isle)
  69 {
  70         struct qed_ooo_archipelago *p_archipelago = NULL;
  71         struct qed_ooo_isle *p_isle = NULL;
  72         u8 the_num_of_isle = 1;
  73
  74         p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
  75         if (!p_archipelago) {
  76                 DP_NOTICE(p_hwfn,
  77                           "Connection %d is not found in OOO list\n", cid);
  78                 return NULL;
  79         }
  80
  81         list_for_each_entry(p_isle, &p_archipelago->isles_list, list_entry) {
  82                 if (the_num_of_isle == isle)
  83                         return p_isle;
  84                 the_num_of_isle++;
  85         }
  86
  87         return NULL;
  88 }
  89
  90 void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
  91                                 struct qed_ooo_info *p_ooo_info,
  92                                 struct ooo_opaque *p_cqe)
  93 {
  94         struct qed_ooo_history *p_history = &p_ooo_info->ooo_history;
  95
  96         if (p_history->head_idx == p_history->num_of_cqes)
  97                 p_history->head_idx = 0;
  98         p_history->p_cqes[p_history->head_idx] = *p_cqe;
  99         p_history->head_idx++;
 100 }
 101
 102 int qed_ooo_alloc(struct qed_hwfn *p_hwfn)
 103 {
 104         u16 max_num_archipelagos = 0, cid_base;
 105         struct qed_ooo_info *p_ooo_info;
 106         enum protocol_type proto;
 107         u16 max_num_isles = 0;
 108         u32 i;
 109
 110         switch (p_hwfn->hw_info.personality) {
 111         case QED_PCI_ISCSI:
 112                 proto = PROTOCOLID_ISCSI;
 113                 break;
 114         case QED_PCI_ETH_RDMA:
 115         case QED_PCI_ETH_IWARP:
 116                 proto = PROTOCOLID_IWARP;
 117                 break;
 118         default:
 119                 DP_NOTICE(p_hwfn,
 120                           "Failed to allocate qed_ooo_info: unknown personality\n");
 121                 return -EINVAL;
 122         }
 123
 124         max_num_archipelagos = (u16)qed_cxt_get_proto_cid_count(p_hwfn, proto,
 125                                                                 NULL);
 126         max_num_isles = QED_MAX_NUM_ISLES + max_num_archipelagos;
 127         cid_base = (u16)qed_cxt_get_proto_cid_start(p_hwfn, proto);
 128
 129         if (!max_num_archipelagos) {
 130                 DP_NOTICE(p_hwfn,
 131                           "Failed to allocate qed_ooo_info: unknown amount of connections\n");
 132                 return -EINVAL;
 133         }
 134
 135         p_ooo_info = kzalloc(sizeof(*p_ooo_info), GFP_KERNEL);
 136         if (!p_ooo_info)
 137                 return -ENOMEM;
 138
 139         p_ooo_info->cid_base = cid_base;
 140         p_ooo_info->max_num_archipelagos = max_num_archipelagos;
 141
 142         INIT_LIST_HEAD(&p_ooo_info->free_buffers_list);
 143         INIT_LIST_HEAD(&p_ooo_info->ready_buffers_list);
 144         INIT_LIST_HEAD(&p_ooo_info->free_isles_list);
 145
 146         p_ooo_info->p_isles_mem = kcalloc(max_num_isles,
 147                                           sizeof(struct qed_ooo_isle),
 148                                           GFP_KERNEL);
 149         if (!p_ooo_info->p_isles_mem)
 150                 goto no_isles_mem;
 151
 152         for (i = 0; i < max_num_isles; i++) {
 153                 INIT_LIST_HEAD(&p_ooo_info->p_isles_mem[i].buffers_list);
 154                 list_add_tail(&p_ooo_info->p_isles_mem[i].list_entry,
 155                               &p_ooo_info->free_isles_list);
 156         }
 157
 158         p_ooo_info->p_archipelagos_mem =
 159                                 kcalloc(max_num_archipelagos,
 160                                         sizeof(struct qed_ooo_archipelago),
 161                                         GFP_KERNEL);
 162         if (!p_ooo_info->p_archipelagos_mem)
 163                 goto no_archipelagos_mem;
 164
 165         for (i = 0; i < max_num_archipelagos; i++)
 166                 INIT_LIST_HEAD(&p_ooo_info->p_archipelagos_mem[i].isles_list);
 167
 168         p_ooo_info->ooo_history.p_cqes =
 169                                 kcalloc(QED_MAX_NUM_OOO_HISTORY_ENTRIES,
 170                                         sizeof(struct ooo_opaque),
 171                                         GFP_KERNEL);
 172         if (!p_ooo_info->ooo_history.p_cqes)
 173                 goto no_history_mem;
 174
 175         p_ooo_info->ooo_history.num_of_cqes = QED_MAX_NUM_OOO_HISTORY_ENTRIES;
 176
 177         p_hwfn->p_ooo_info = p_ooo_info;
 178         return 0;
 179
 180 no_history_mem:
 181         kfree(p_ooo_info->p_archipelagos_mem);
 182 no_archipelagos_mem:
 183         kfree(p_ooo_info->p_isles_mem);
 184 no_isles_mem:
 185         kfree(p_ooo_info);
 186         return -ENOMEM;
 187 }
 188
 189 void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
 190                                       struct qed_ooo_info *p_ooo_info, u32 cid)
 191 {
 192         struct qed_ooo_archipelago *p_archipelago;
 193         struct qed_ooo_buffer *p_buffer;
 194         struct qed_ooo_isle *p_isle;
 195
 196         p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
 197         if (!p_archipelago)
 198                 return;
 199
 200         while (!list_empty(&p_archipelago->isles_list)) {
 201                 p_isle = list_first_entry(&p_archipelago->isles_list,
 202                                           struct qed_ooo_isle, list_entry);
 203
 204                 list_del(&p_isle->list_entry);
 205
 206                 while (!list_empty(&p_isle->buffers_list)) {
 207                         p_buffer = list_first_entry(&p_isle->buffers_list,
 208                                                     struct qed_ooo_buffer,
 209                                                     list_entry);
 210
 211                         if (!p_buffer)
 212                                 break;
 213
 214                         list_move_tail(&p_buffer->list_entry,
 215                                        &p_ooo_info->free_buffers_list);
 216                 }
 217                 list_add_tail(&p_isle->list_entry,
 218                               &p_ooo_info->free_isles_list);
 219         }
 220 }
 221
 222 void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
 223                                struct qed_ooo_info *p_ooo_info)
 224 {
 225         struct qed_ooo_archipelago *p_archipelago;
 226         struct qed_ooo_buffer *p_buffer;
 227         struct qed_ooo_isle *p_isle;
 228         u32 i;
 229
 230         for (i = 0; i < p_ooo_info->max_num_archipelagos; i++) {
 231                 p_archipelago = &(p_ooo_info->p_archipelagos_mem[i]);
 232
 233                 while (!list_empty(&p_archipelago->isles_list)) {
 234                         p_isle = list_first_entry(&p_archipelago->isles_list,
 235                                                   struct qed_ooo_isle,
 236                                                   list_entry);
 237
 238                         list_del(&p_isle->list_entry);
 239
 240                         while (!list_empty(&p_isle->buffers_list)) {
 241                                 p_buffer =
 242                                     list_first_entry(&p_isle->buffers_list,
 243                                                      struct qed_ooo_buffer,
 244                                                      list_entry);
 245
 246                                 if (!p_buffer)
 247                                         break;
 248
 249                                 list_move_tail(&p_buffer->list_entry,
 250                                                &p_ooo_info->free_buffers_list);
 251                         }
 252                         list_add_tail(&p_isle->list_entry,
 253                                       &p_ooo_info->free_isles_list);
 254                 }
 255         }
 256         if (!list_empty(&p_ooo_info->ready_buffers_list))
 257                 list_splice_tail_init(&p_ooo_info->ready_buffers_list,
 258                                       &p_ooo_info->free_buffers_list);
 259 }
 260
 261 void qed_ooo_setup(struct qed_hwfn *p_hwfn)
 262 {
 263         qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
 264         memset(p_hwfn->p_ooo_info->ooo_history.p_cqes, 0,
 265                p_hwfn->p_ooo_info->ooo_history.num_of_cqes *
 266                sizeof(struct ooo_opaque));
 267         p_hwfn->p_ooo_info->ooo_history.head_idx = 0;
 268 }
 269
 270 void qed_ooo_free(struct qed_hwfn *p_hwfn)
 271 {
 272         struct qed_ooo_info *p_ooo_info  = p_hwfn->p_ooo_info;
 273         struct qed_ooo_buffer *p_buffer;
 274
 275         if (!p_ooo_info)
 276                 return;
 277
 278         qed_ooo_release_all_isles(p_hwfn, p_ooo_info);
 279         while (!list_empty(&p_ooo_info->free_buffers_list)) {
 280                 p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
 281                                             struct qed_ooo_buffer, list_entry);
 282
 283                 if (!p_buffer)
 284                         break;
 285
 286                 list_del(&p_buffer->list_entry);
 287                 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
 288                                   p_buffer->rx_buffer_size,
 289                                   p_buffer->rx_buffer_virt_addr,
 290                                   p_buffer->rx_buffer_phys_addr);
 291                 kfree(p_buffer);
 292         }
 293
 294         kfree(p_ooo_info->p_isles_mem);
 295         kfree(p_ooo_info->p_archipelagos_mem);
 296         kfree(p_ooo_info->ooo_history.p_cqes);
 297         kfree(p_ooo_info);
 298         p_hwfn->p_ooo_info = NULL;
 299 }
 300
 301 void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
 302                              struct qed_ooo_info *p_ooo_info,
 303                              struct qed_ooo_buffer *p_buffer)
 304 {
 305         list_add_tail(&p_buffer->list_entry, &p_ooo_info->free_buffers_list);
 306 }
 307
 308 struct qed_ooo_buffer *qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
 309                                                struct qed_ooo_info *p_ooo_info)
 310 {
 311         struct qed_ooo_buffer *p_buffer = NULL;
 312
 313         if (!list_empty(&p_ooo_info->free_buffers_list)) {
 314                 p_buffer = list_first_entry(&p_ooo_info->free_buffers_list,
 315                                             struct qed_ooo_buffer, list_entry);
 316
 317                 list_del(&p_buffer->list_entry);
 318         }
 319
 320         return p_buffer;
 321 }
 322
 323 void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
 324                               struct qed_ooo_info *p_ooo_info,
 325                               struct qed_ooo_buffer *p_buffer, u8 on_tail)
 326 {
 327         if (on_tail)
 328                 list_add_tail(&p_buffer->list_entry,
 329                               &p_ooo_info->ready_buffers_list);
 330         else
 331                 list_add(&p_buffer->list_entry,
 332                          &p_ooo_info->ready_buffers_list);
 333 }
 334
 335 struct qed_ooo_buffer *qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
 336                                                 struct qed_ooo_info *p_ooo_info)
 337 {
 338         struct qed_ooo_buffer *p_buffer = NULL;
 339
 340         if (!list_empty(&p_ooo_info->ready_buffers_list)) {
 341                 p_buffer = list_first_entry(&p_ooo_info->ready_buffers_list,
 342                                             struct qed_ooo_buffer, list_entry);
 343
 344                 list_del(&p_buffer->list_entry);
 345         }
 346
 347         return p_buffer;
 348 }
 349
 350 void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
 351                           struct qed_ooo_info *p_ooo_info,
 352                           u32 cid, u8 drop_isle, u8 drop_size)
 353 {
 354         struct qed_ooo_isle *p_isle = NULL;
 355         u8 isle_idx;
 356
 357         for (isle_idx = 0; isle_idx < drop_size; isle_idx++) {
 358                 p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, drop_isle);
 359                 if (!p_isle) {
 360                         DP_NOTICE(p_hwfn,
 361                                   "Isle %d is not found(cid %d)\n",
 362                                   drop_isle, cid);
 363                         return;
 364                 }
 365                 if (list_empty(&p_isle->buffers_list))
 366                         DP_NOTICE(p_hwfn,
 367                                   "Isle %d is empty(cid %d)\n", drop_isle, cid);
 368                 else
 369                         list_splice_tail_init(&p_isle->buffers_list,
 370                                               &p_ooo_info->free_buffers_list);
 371
 372                 list_del(&p_isle->list_entry);
 373                 p_ooo_info->cur_isles_number--;
 374                 list_add(&p_isle->list_entry, &p_ooo_info->free_isles_list);
 375         }
 376 }
 377
 378 void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
 379                           struct qed_ooo_info *p_ooo_info,
 380                           u32 cid, u8 ooo_isle,
 381                           struct qed_ooo_buffer *p_buffer)
 382 {
 383         struct qed_ooo_archipelago *p_archipelago = NULL;
 384         struct qed_ooo_isle *p_prev_isle = NULL;
 385         struct qed_ooo_isle *p_isle = NULL;
 386
 387         if (ooo_isle > 1) {
 388                 p_prev_isle = qed_ooo_seek_isle(p_hwfn,
 389                                                 p_ooo_info, cid, ooo_isle - 1);
 390                 if (!p_prev_isle) {
 391                         DP_NOTICE(p_hwfn,
 392                                   "Isle %d is not found(cid %d)\n",
 393                                   ooo_isle - 1, cid);
 394                         return;
 395                 }
 396         }
 397         p_archipelago = qed_ooo_seek_archipelago(p_hwfn, p_ooo_info, cid);
 398         if (!p_archipelago && (ooo_isle != 1)) {
 399                 DP_NOTICE(p_hwfn,
 400                           "Connection %d is not found in OOO list\n", cid);
 401                 return;
 402         }
 403
 404         if (!list_empty(&p_ooo_info->free_isles_list)) {
 405                 p_isle = list_first_entry(&p_ooo_info->free_isles_list,
 406                                           struct qed_ooo_isle, list_entry);
 407
 408                 list_del(&p_isle->list_entry);
 409                 if (!list_empty(&p_isle->buffers_list)) {
 410                         DP_NOTICE(p_hwfn, "Free isle is not empty\n");
 411                         INIT_LIST_HEAD(&p_isle->buffers_list);
 412                 }
 413         } else {
 414                 DP_NOTICE(p_hwfn, "No more free isles\n");
 415                 return;
 416         }
 417
 418         if (!p_archipelago) {
 419                 u32 idx = (cid & 0xffff) - p_ooo_info->cid_base;
 420
 421                 p_archipelago = &p_ooo_info->p_archipelagos_mem[idx];
 422         }
 423
 424         list_add(&p_buffer->list_entry, &p_isle->buffers_list);
 425         p_ooo_info->cur_isles_number++;
 426         p_ooo_info->gen_isles_number++;
 427
 428         if (p_ooo_info->cur_isles_number > p_ooo_info->max_isles_number)
 429                 p_ooo_info->max_isles_number = p_ooo_info->cur_isles_number;
 430
 431         if (!p_prev_isle)
 432                 list_add(&p_isle->list_entry, &p_archipelago->isles_list);
 433         else
 434                 list_add(&p_isle->list_entry, &p_prev_isle->list_entry);
 435 }
 436
 437 void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
 438                             struct qed_ooo_info *p_ooo_info,
 439                             u32 cid,
 440                             u8 ooo_isle,
 441                             struct qed_ooo_buffer *p_buffer, u8 buffer_side)
 442 {
 443         struct qed_ooo_isle *p_isle = NULL;
 444
 445         p_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid, ooo_isle);
 446         if (!p_isle) {
 447                 DP_NOTICE(p_hwfn,
 448                           "Isle %d is not found(cid %d)\n", ooo_isle, cid);
 449                 return;
 450         }
 451
 452         if (buffer_side == QED_OOO_LEFT_BUF)
 453                 list_add(&p_buffer->list_entry, &p_isle->buffers_list);
 454         else
 455                 list_add_tail(&p_buffer->list_entry, &p_isle->buffers_list);
 456 }
 457
 458 void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
 459                         struct qed_ooo_info *p_ooo_info, u32 cid, u8 left_isle)
 460 {
 461         struct qed_ooo_isle *p_right_isle = NULL;
 462         struct qed_ooo_isle *p_left_isle = NULL;
 463
 464         p_right_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
 465                                          left_isle + 1);
 466         if (!p_right_isle) {
 467                 DP_NOTICE(p_hwfn,
 468                           "Right isle %d is not found(cid %d)\n",
 469                           left_isle + 1, cid);
 470                 return;
 471         }
 472
 473         list_del(&p_right_isle->list_entry);
 474         p_ooo_info->cur_isles_number--;
 475         if (left_isle) {
 476                 p_left_isle = qed_ooo_seek_isle(p_hwfn, p_ooo_info, cid,
 477                                                 left_isle);
 478                 if (!p_left_isle) {
 479                         DP_NOTICE(p_hwfn,
 480                                   "Left isle %d is not found(cid %d)\n",
 481                                   left_isle, cid);
 482                         return;
 483                 }
 484                 list_splice_tail_init(&p_right_isle->buffers_list,
 485                                       &p_left_isle->buffers_list);
 486         } else {
 487                 list_splice_tail_init(&p_right_isle->buffers_list,
 488                                       &p_ooo_info->ready_buffers_list);
 489         }
 490         list_add_tail(&p_right_isle->list_entry, &p_ooo_info->free_isles_list);
 491 }