drivers/infiniband/hw/i40iw/i40iw_verbs.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/random.h>
  38 #include <linux/highmem.h>
  39 #include <linux/time.h>
  40 #include <asm/byteorder.h>
  41 #include <net/ip.h>
  42 #include <rdma/ib_verbs.h>
  43 #include <rdma/iw_cm.h>
  44 #include <rdma/ib_user_verbs.h>
  45 #include <rdma/ib_umem.h>
  46 #include "i40iw.h"
  47
  48 /**
  49  * i40iw_query_device - get device attributes
  50  * @ibdev: device pointer from stack
  51  * @props: returning device attributes
  52  * @udata: user data
  53  */
  54 static int i40iw_query_device(struct ib_device *ibdev,
  55                               struct ib_device_attr *props,
  56                               struct ib_udata *udata)
  57 {
  58         struct i40iw_device *iwdev = to_iwdev(ibdev);
  59
  60         if (udata->inlen || udata->outlen)
  61                 return -EINVAL;
  62         memset(props, 0, sizeof(*props));
  63         ether_addr_copy((u8 *)&props->sys_image_guid, iwdev->netdev->dev_addr);
  64         props->fw_ver = I40IW_FW_VERSION;
  65         props->device_cap_flags = iwdev->device_cap_flags;
  66         props->vendor_id = iwdev->ldev->pcidev->vendor;
  67         props->vendor_part_id = iwdev->ldev->pcidev->device;
  68         props->hw_ver = (u32)iwdev->sc_dev.hw_rev;
  69         props->max_mr_size = I40IW_MAX_OUTBOUND_MESSAGE_SIZE;
  70         props->max_qp = iwdev->max_qp;
  71         props->max_qp_wr = (I40IW_MAX_WQ_ENTRIES >> 2) - 1;
  72         props->max_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
  73         props->max_cq = iwdev->max_cq;
  74         props->max_cqe = iwdev->max_cqe;
  75         props->max_mr = iwdev->max_mr;
  76         props->max_pd = iwdev->max_pd;
  77         props->max_sge_rd = I40IW_MAX_SGE_RD;
  78         props->max_qp_rd_atom = I40IW_MAX_IRD_SIZE;
  79         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
  80         props->atomic_cap = IB_ATOMIC_NONE;
  81         props->max_map_per_fmr = 1;
  82         return 0;
  83 }
  84
  85 /**
  86  * i40iw_query_port - get port attrubutes
  87  * @ibdev: device pointer from stack
  88  * @port: port number for query
  89  * @props: returning device attributes
  90  */
  91 static int i40iw_query_port(struct ib_device *ibdev,
  92                             u8 port,
  93                             struct ib_port_attr *props)
  94 {
  95         struct i40iw_device *iwdev = to_iwdev(ibdev);
  96         struct net_device *netdev = iwdev->netdev;
  97
  98         memset(props, 0, sizeof(*props));
  99
 100         props->max_mtu = IB_MTU_4096;
 101         if (netdev->mtu >= 4096)
 102                 props->active_mtu = IB_MTU_4096;
 103         else if (netdev->mtu >= 2048)
 104                 props->active_mtu = IB_MTU_2048;
 105         else if (netdev->mtu >= 1024)
 106                 props->active_mtu = IB_MTU_1024;
 107         else if (netdev->mtu >= 512)
 108                 props->active_mtu = IB_MTU_512;
 109         else
 110                 props->active_mtu = IB_MTU_256;
 111
 112         props->lid = 1;
 113         if (netif_carrier_ok(iwdev->netdev))
 114                 props->state = IB_PORT_ACTIVE;
 115         else
 116                 props->state = IB_PORT_DOWN;
 117         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 118                 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 119         props->gid_tbl_len = 1;
 120         props->pkey_tbl_len = 1;
 121         props->active_width = IB_WIDTH_4X;
 122         props->active_speed = 1;
 123         props->max_msg_sz = I40IW_MAX_OUTBOUND_MESSAGE_SIZE;
 124         return 0;
 125 }
 126
 127 /**
 128  * i40iw_alloc_ucontext - Allocate the user context data structure
 129  * @ibdev: device pointer from stack
 130  * @udata: user data
 131  *
 132  * This keeps track of all objects associated with a particular
 133  * user-mode client.
 134  */
 135 static struct ib_ucontext *i40iw_alloc_ucontext(struct ib_device *ibdev,
 136                                                 struct ib_udata *udata)
 137 {
 138         struct i40iw_device *iwdev = to_iwdev(ibdev);
 139         struct i40iw_alloc_ucontext_req req;
 140         struct i40iw_alloc_ucontext_resp uresp;
 141         struct i40iw_ucontext *ucontext;
 142
 143         if (ib_copy_from_udata(&req, udata, sizeof(req)))
 144                 return ERR_PTR(-EINVAL);
 145
 146         if (req.userspace_ver != I40IW_ABI_USERSPACE_VER) {
 147                 i40iw_pr_err("Invalid userspace driver version detected. Detected version %d, should be %d\n",
 148                              req.userspace_ver, I40IW_ABI_USERSPACE_VER);
 149                 return ERR_PTR(-EINVAL);
 150         }
 151
 152         memset(&uresp, 0, sizeof(uresp));
 153         uresp.max_qps = iwdev->max_qp;
 154         uresp.max_pds = iwdev->max_pd;
 155         uresp.wq_size = iwdev->max_qp_wr * 2;
 156         uresp.kernel_ver = I40IW_ABI_KERNEL_VER;
 157
 158         ucontext = kzalloc(sizeof(*ucontext), GFP_KERNEL);
 159         if (!ucontext)
 160                 return ERR_PTR(-ENOMEM);
 161
 162         ucontext->iwdev = iwdev;
 163
 164         if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
 165                 kfree(ucontext);
 166                 return ERR_PTR(-EFAULT);
 167         }
 168
 169         INIT_LIST_HEAD(&ucontext->cq_reg_mem_list);
 170         spin_lock_init(&ucontext->cq_reg_mem_list_lock);
 171         INIT_LIST_HEAD(&ucontext->qp_reg_mem_list);
 172         spin_lock_init(&ucontext->qp_reg_mem_list_lock);
 173
 174         return &ucontext->ibucontext;
 175 }
 176
 177 /**
 178  * i40iw_dealloc_ucontext - deallocate the user context data structure
 179  * @context: user context created during alloc
 180  */
 181 static int i40iw_dealloc_ucontext(struct ib_ucontext *context)
 182 {
 183         struct i40iw_ucontext *ucontext = to_ucontext(context);
 184         unsigned long flags;
 185
 186         spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
 187         if (!list_empty(&ucontext->cq_reg_mem_list)) {
 188                 spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
 189                 return -EBUSY;
 190         }
 191         spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
 192         spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
 193         if (!list_empty(&ucontext->qp_reg_mem_list)) {
 194                 spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
 195                 return -EBUSY;
 196         }
 197         spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
 198
 199         kfree(ucontext);
 200         return 0;
 201 }
 202
 203 /**
 204  * i40iw_mmap - user memory map
 205  * @context: context created during alloc
 206  * @vma: kernel info for user memory map
 207  */
 208 static int i40iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 209 {
 210         struct i40iw_ucontext *ucontext;
 211         u64 db_addr_offset;
 212         u64 push_offset;
 213
 214         ucontext = to_ucontext(context);
 215         if (ucontext->iwdev->sc_dev.is_pf) {
 216                 db_addr_offset = I40IW_DB_ADDR_OFFSET;
 217                 push_offset = I40IW_PUSH_OFFSET;
 218                 if (vma->vm_pgoff)
 219                         vma->vm_pgoff += I40IW_PF_FIRST_PUSH_PAGE_INDEX - 1;
 220         } else {
 221                 db_addr_offset = I40IW_VF_DB_ADDR_OFFSET;
 222                 push_offset = I40IW_VF_PUSH_OFFSET;
 223                 if (vma->vm_pgoff)
 224                         vma->vm_pgoff += I40IW_VF_FIRST_PUSH_PAGE_INDEX - 1;
 225         }
 226
 227         vma->vm_pgoff += db_addr_offset >> PAGE_SHIFT;
 228
 229         if (vma->vm_pgoff == (db_addr_offset >> PAGE_SHIFT)) {
 230                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 231                 vma->vm_private_data = ucontext;
 232         } else {
 233                 if ((vma->vm_pgoff - (push_offset >> PAGE_SHIFT)) % 2)
 234                         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 235                 else
 236                         vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
 237         }
 238
 239         if (io_remap_pfn_range(vma, vma->vm_start,
 240                                vma->vm_pgoff + (pci_resource_start(ucontext->iwdev->ldev->pcidev, 0) >> PAGE_SHIFT),
 241                                PAGE_SIZE, vma->vm_page_prot))
 242                 return -EAGAIN;
 243
 244         return 0;
 245 }
 246
 247 /**
 248  * i40iw_alloc_push_page - allocate a push page for qp
 249  * @iwdev: iwarp device
 250  * @qp: hardware control qp
 251  */
 252 static void i40iw_alloc_push_page(struct i40iw_device *iwdev, struct i40iw_sc_qp *qp)
 253 {
 254         struct i40iw_cqp_request *cqp_request;
 255         struct cqp_commands_info *cqp_info;
 256         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 257         enum i40iw_status_code status;
 258
 259         if (qp->push_idx != I40IW_INVALID_PUSH_PAGE_INDEX)
 260                 return;
 261
 262         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 263         if (!cqp_request)
 264                 return;
 265
 266         atomic_inc(&cqp_request->refcount);
 267
 268         cqp_info = &cqp_request->info;
 269         cqp_info->cqp_cmd = OP_MANAGE_PUSH_PAGE;
 270         cqp_info->post_sq = 1;
 271
 272         cqp_info->in.u.manage_push_page.info.qs_handle = dev->qs_handle;
 273         cqp_info->in.u.manage_push_page.info.free_page = 0;
 274         cqp_info->in.u.manage_push_page.cqp = &iwdev->cqp.sc_cqp;
 275         cqp_info->in.u.manage_push_page.scratch = (uintptr_t)cqp_request;
 276
 277         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 278         if (!status)
 279                 qp->push_idx = cqp_request->compl_info.op_ret_val;
 280         else
 281                 i40iw_pr_err("CQP-OP Push page fail");
 282         i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
 283 }
 284
 285 /**
 286  * i40iw_dealloc_push_page - free a push page for qp
 287  * @iwdev: iwarp device
 288  * @qp: hardware control qp
 289  */
 290 static void i40iw_dealloc_push_page(struct i40iw_device *iwdev, struct i40iw_sc_qp *qp)
 291 {
 292         struct i40iw_cqp_request *cqp_request;
 293         struct cqp_commands_info *cqp_info;
 294         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 295         enum i40iw_status_code status;
 296
 297         if (qp->push_idx == I40IW_INVALID_PUSH_PAGE_INDEX)
 298                 return;
 299
 300         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 301         if (!cqp_request)
 302                 return;
 303
 304         cqp_info = &cqp_request->info;
 305         cqp_info->cqp_cmd = OP_MANAGE_PUSH_PAGE;
 306         cqp_info->post_sq = 1;
 307
 308         cqp_info->in.u.manage_push_page.info.push_idx = qp->push_idx;
 309         cqp_info->in.u.manage_push_page.info.qs_handle = dev->qs_handle;
 310         cqp_info->in.u.manage_push_page.info.free_page = 1;
 311         cqp_info->in.u.manage_push_page.cqp = &iwdev->cqp.sc_cqp;
 312         cqp_info->in.u.manage_push_page.scratch = (uintptr_t)cqp_request;
 313
 314         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 315         if (!status)
 316                 qp->push_idx = I40IW_INVALID_PUSH_PAGE_INDEX;
 317         else
 318                 i40iw_pr_err("CQP-OP Push page fail");
 319 }
 320
 321 /**
 322  * i40iw_alloc_pd - allocate protection domain
 323  * @ibdev: device pointer from stack
 324  * @context: user context created during alloc
 325  * @udata: user data
 326  */
 327 static struct ib_pd *i40iw_alloc_pd(struct ib_device *ibdev,
 328                                     struct ib_ucontext *context,
 329                                     struct ib_udata *udata)
 330 {
 331         struct i40iw_pd *iwpd;
 332         struct i40iw_device *iwdev = to_iwdev(ibdev);
 333         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 334         struct i40iw_alloc_pd_resp uresp;
 335         struct i40iw_sc_pd *sc_pd;
 336         u32 pd_id = 0;
 337         int err;
 338
 339         err = i40iw_alloc_resource(iwdev, iwdev->allocated_pds,
 340                                    iwdev->max_pd, &pd_id, &iwdev->next_pd);
 341         if (err) {
 342                 i40iw_pr_err("alloc resource failed\n");
 343                 return ERR_PTR(err);
 344         }
 345
 346         iwpd = kzalloc(sizeof(*iwpd), GFP_KERNEL);
 347         if (!iwpd) {
 348                 err = -ENOMEM;
 349                 goto free_res;
 350         }
 351
 352         sc_pd = &iwpd->sc_pd;
 353         dev->iw_pd_ops->pd_init(dev, sc_pd, pd_id);
 354
 355         if (context) {
 356                 memset(&uresp, 0, sizeof(uresp));
 357                 uresp.pd_id = pd_id;
 358                 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
 359                         err = -EFAULT;
 360                         goto error;
 361                 }
 362         }
 363
 364         i40iw_add_pdusecount(iwpd);
 365         return &iwpd->ibpd;
 366 error:
 367         kfree(iwpd);
 368 free_res:
 369         i40iw_free_resource(iwdev, iwdev->allocated_pds, pd_id);
 370         return ERR_PTR(err);
 371 }
 372
 373 /**
 374  * i40iw_dealloc_pd - deallocate pd
 375  * @ibpd: ptr of pd to be deallocated
 376  */
 377 static int i40iw_dealloc_pd(struct ib_pd *ibpd)
 378 {
 379         struct i40iw_pd *iwpd = to_iwpd(ibpd);
 380         struct i40iw_device *iwdev = to_iwdev(ibpd->device);
 381
 382         i40iw_rem_pdusecount(iwpd, iwdev);
 383         return 0;
 384 }
 385
 386 /**
 387  * i40iw_qp_roundup - return round up qp ring size
 388  * @wr_ring_size: ring size to round up
 389  */
 390 static int i40iw_qp_roundup(u32 wr_ring_size)
 391 {
 392         int scount = 1;
 393
 394         if (wr_ring_size < I40IWQP_SW_MIN_WQSIZE)
 395                 wr_ring_size = I40IWQP_SW_MIN_WQSIZE;
 396
 397         for (wr_ring_size--; scount <= 16; scount *= 2)
 398                 wr_ring_size |= wr_ring_size >> scount;
 399         return ++wr_ring_size;
 400 }
 401
 402 /**
 403  * i40iw_get_pbl - Retrieve pbl from a list given a virtual
 404  * address
 405  * @va: user virtual address
 406  * @pbl_list: pbl list to search in (QP's or CQ's)
 407  */
 408 static struct i40iw_pbl *i40iw_get_pbl(unsigned long va,
 409                                        struct list_head *pbl_list)
 410 {
 411         struct i40iw_pbl *iwpbl;
 412
 413         list_for_each_entry(iwpbl, pbl_list, list) {
 414                 if (iwpbl->user_base == va) {
 415                         list_del(&iwpbl->list);
 416                         return iwpbl;
 417                 }
 418         }
 419         return NULL;
 420 }
 421
 422 /**
 423  * i40iw_free_qp_resources - free up memory resources for qp
 424  * @iwdev: iwarp device
 425  * @iwqp: qp ptr (user or kernel)
 426  * @qp_num: qp number assigned
 427  */
 428 void i40iw_free_qp_resources(struct i40iw_device *iwdev,
 429                              struct i40iw_qp *iwqp,
 430                              u32 qp_num)
 431 {
 432         i40iw_dealloc_push_page(iwdev, &iwqp->sc_qp);
 433         if (qp_num)
 434                 i40iw_free_resource(iwdev, iwdev->allocated_qps, qp_num);
 435         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->q2_ctx_mem);
 436         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->kqp.dma_mem);
 437         kfree(iwqp->kqp.wrid_mem);
 438         iwqp->kqp.wrid_mem = NULL;
 439         kfree(iwqp->allocated_buffer);
 440 }
 441
 442 /**
 443  * i40iw_clean_cqes - clean cq entries for qp
 444  * @iwqp: qp ptr (user or kernel)
 445  * @iwcq: cq ptr
 446  */
 447 static void i40iw_clean_cqes(struct i40iw_qp *iwqp, struct i40iw_cq *iwcq)
 448 {
 449         struct i40iw_cq_uk *ukcq = &iwcq->sc_cq.cq_uk;
 450
 451         ukcq->ops.iw_cq_clean(&iwqp->sc_qp.qp_uk, ukcq);
 452 }
 453
 454 /**
 455  * i40iw_destroy_qp - destroy qp
 456  * @ibqp: qp's ib pointer also to get to device's qp address
 457  */
 458 static int i40iw_destroy_qp(struct ib_qp *ibqp)
 459 {
 460         struct i40iw_qp *iwqp = to_iwqp(ibqp);
 461
 462         iwqp->destroyed = 1;
 463
 464         if (iwqp->ibqp_state >= IB_QPS_INIT && iwqp->ibqp_state < IB_QPS_RTS)
 465                 i40iw_next_iw_state(iwqp, I40IW_QP_STATE_ERROR, 0, 0, 0);
 466
 467         if (!iwqp->user_mode) {
 468                 if (iwqp->iwscq) {
 469                         i40iw_clean_cqes(iwqp, iwqp->iwscq);
 470                         if (iwqp->iwrcq != iwqp->iwscq)
 471                                 i40iw_clean_cqes(iwqp, iwqp->iwrcq);
 472                 }
 473         }
 474
 475         i40iw_rem_ref(&iwqp->ibqp);
 476         return 0;
 477 }
 478
 479 /**
 480  * i40iw_setup_virt_qp - setup for allocation of virtual qp
 481  * @dev: iwarp device
 482  * @qp: qp ptr
 483  * @init_info: initialize info to return
 484  */
 485 static int i40iw_setup_virt_qp(struct i40iw_device *iwdev,
 486                                struct i40iw_qp *iwqp,
 487                                struct i40iw_qp_init_info *init_info)
 488 {
 489         struct i40iw_pbl *iwpbl = iwqp->iwpbl;
 490         struct i40iw_qp_mr *qpmr = &iwpbl->qp_mr;
 491
 492         iwqp->page = qpmr->sq_page;
 493         init_info->shadow_area_pa = cpu_to_le64(qpmr->shadow);
 494         if (iwpbl->pbl_allocated) {
 495                 init_info->virtual_map = true;
 496                 init_info->sq_pa = qpmr->sq_pbl.idx;
 497                 init_info->rq_pa = qpmr->rq_pbl.idx;
 498         } else {
 499                 init_info->sq_pa = qpmr->sq_pbl.addr;
 500                 init_info->rq_pa = qpmr->rq_pbl.addr;
 501         }
 502         return 0;
 503 }
 504
 505 /**
 506  * i40iw_setup_kmode_qp - setup initialization for kernel mode qp
 507  * @iwdev: iwarp device
 508  * @iwqp: qp ptr (user or kernel)
 509  * @info: initialize info to return
 510  */
 511 static int i40iw_setup_kmode_qp(struct i40iw_device *iwdev,
 512                                 struct i40iw_qp *iwqp,
 513                                 struct i40iw_qp_init_info *info)
 514 {
 515         struct i40iw_dma_mem *mem = &iwqp->kqp.dma_mem;
 516         u32 sqdepth, rqdepth;
 517         u32 sq_size, rq_size;
 518         u8 sqshift, rqshift;
 519         u32 size;
 520         enum i40iw_status_code status;
 521         struct i40iw_qp_uk_init_info *ukinfo = &info->qp_uk_init_info;
 522
 523         sq_size = i40iw_qp_roundup(ukinfo->sq_size + 1);
 524         rq_size = i40iw_qp_roundup(ukinfo->rq_size + 1);
 525
 526         status = i40iw_get_wqe_shift(sq_size, ukinfo->max_sq_frag_cnt, ukinfo->max_inline_data, &sqshift);
 527         if (!status)
 528                 status = i40iw_get_wqe_shift(rq_size, ukinfo->max_rq_frag_cnt, 0, &rqshift);
 529
 530         if (status)
 531                 return -ENOSYS;
 532
 533         sqdepth = sq_size << sqshift;
 534         rqdepth = rq_size << rqshift;
 535
 536         size = sqdepth * sizeof(struct i40iw_sq_uk_wr_trk_info) + (rqdepth << 3);
 537         iwqp->kqp.wrid_mem = kzalloc(size, GFP_KERNEL);
 538
 539         ukinfo->sq_wrtrk_array = (struct i40iw_sq_uk_wr_trk_info *)iwqp->kqp.wrid_mem;
 540         if (!ukinfo->sq_wrtrk_array)
 541                 return -ENOMEM;
 542
 543         ukinfo->rq_wrid_array = (u64 *)&ukinfo->sq_wrtrk_array[sqdepth];
 544
 545         size = (sqdepth + rqdepth) * I40IW_QP_WQE_MIN_SIZE;
 546         size += (I40IW_SHADOW_AREA_SIZE << 3);
 547
 548         status = i40iw_allocate_dma_mem(iwdev->sc_dev.hw, mem, size, 256);
 549         if (status) {
 550                 kfree(ukinfo->sq_wrtrk_array);
 551                 ukinfo->sq_wrtrk_array = NULL;
 552                 return -ENOMEM;
 553         }
 554
 555         ukinfo->sq = mem->va;
 556         info->sq_pa = mem->pa;
 557
 558         ukinfo->rq = &ukinfo->sq[sqdepth];
 559         info->rq_pa = info->sq_pa + (sqdepth * I40IW_QP_WQE_MIN_SIZE);
 560
 561         ukinfo->shadow_area = ukinfo->rq[rqdepth].elem;
 562         info->shadow_area_pa = info->rq_pa + (rqdepth * I40IW_QP_WQE_MIN_SIZE);
 563
 564         ukinfo->sq_size = sq_size;
 565         ukinfo->rq_size = rq_size;
 566         ukinfo->qp_id = iwqp->ibqp.qp_num;
 567         return 0;
 568 }
 569
 570 /**
 571  * i40iw_create_qp - create qp
 572  * @ibpd: ptr of pd
 573  * @init_attr: attributes for qp
 574  * @udata: user data for create qp
 575  */
 576 static struct ib_qp *i40iw_create_qp(struct ib_pd *ibpd,
 577                                      struct ib_qp_init_attr *init_attr,
 578                                      struct ib_udata *udata)
 579 {
 580         struct i40iw_pd *iwpd = to_iwpd(ibpd);
 581         struct i40iw_device *iwdev = to_iwdev(ibpd->device);
 582         struct i40iw_cqp *iwcqp = &iwdev->cqp;
 583         struct i40iw_qp *iwqp;
 584         struct i40iw_ucontext *ucontext;
 585         struct i40iw_create_qp_req req;
 586         struct i40iw_create_qp_resp uresp;
 587         u32 qp_num = 0;
 588         void *mem;
 589         enum i40iw_status_code ret;
 590         int err_code;
 591         int sq_size;
 592         int rq_size;
 593         struct i40iw_sc_qp *qp;
 594         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 595         struct i40iw_qp_init_info init_info;
 596         struct i40iw_create_qp_info *qp_info;
 597         struct i40iw_cqp_request *cqp_request;
 598         struct cqp_commands_info *cqp_info;
 599
 600         struct i40iw_qp_host_ctx_info *ctx_info;
 601         struct i40iwarp_offload_info *iwarp_info;
 602         unsigned long flags;
 603
 604         if (init_attr->create_flags)
 605                 return ERR_PTR(-EINVAL);
 606         if (init_attr->cap.max_inline_data > I40IW_MAX_INLINE_DATA_SIZE)
 607                 init_attr->cap.max_inline_data = I40IW_MAX_INLINE_DATA_SIZE;
 608
 609         if (init_attr->cap.max_send_sge > I40IW_MAX_WQ_FRAGMENT_COUNT)
 610                 init_attr->cap.max_send_sge = I40IW_MAX_WQ_FRAGMENT_COUNT;
 611
 612         memset(&init_info, 0, sizeof(init_info));
 613
 614         sq_size = init_attr->cap.max_send_wr;
 615         rq_size = init_attr->cap.max_recv_wr;
 616
 617         init_info.qp_uk_init_info.sq_size = sq_size;
 618         init_info.qp_uk_init_info.rq_size = rq_size;
 619         init_info.qp_uk_init_info.max_sq_frag_cnt = init_attr->cap.max_send_sge;
 620         init_info.qp_uk_init_info.max_rq_frag_cnt = init_attr->cap.max_recv_sge;
 621         init_info.qp_uk_init_info.max_inline_data = init_attr->cap.max_inline_data;
 622
 623         mem = kzalloc(sizeof(*iwqp), GFP_KERNEL);
 624         if (!mem)
 625                 return ERR_PTR(-ENOMEM);
 626
 627         iwqp = (struct i40iw_qp *)mem;
 628         qp = &iwqp->sc_qp;
 629         qp->back_qp = (void *)iwqp;
 630         qp->push_idx = I40IW_INVALID_PUSH_PAGE_INDEX;
 631
 632         iwqp->ctx_info.iwarp_info = &iwqp->iwarp_info;
 633
 634         if (i40iw_allocate_dma_mem(dev->hw,
 635                                    &iwqp->q2_ctx_mem,
 636                                    I40IW_Q2_BUFFER_SIZE + I40IW_QP_CTX_SIZE,
 637                                    256)) {
 638                 i40iw_pr_err("dma_mem failed\n");
 639                 err_code = -ENOMEM;
 640                 goto error;
 641         }
 642
 643         init_info.q2 = iwqp->q2_ctx_mem.va;
 644         init_info.q2_pa = iwqp->q2_ctx_mem.pa;
 645
 646         init_info.host_ctx = (void *)init_info.q2 + I40IW_Q2_BUFFER_SIZE;
 647         init_info.host_ctx_pa = init_info.q2_pa + I40IW_Q2_BUFFER_SIZE;
 648
 649         err_code = i40iw_alloc_resource(iwdev, iwdev->allocated_qps, iwdev->max_qp,
 650                                         &qp_num, &iwdev->next_qp);
 651         if (err_code) {
 652                 i40iw_pr_err("qp resource\n");
 653                 goto error;
 654         }
 655
 656         iwqp->allocated_buffer = mem;
 657         iwqp->iwdev = iwdev;
 658         iwqp->iwpd = iwpd;
 659         iwqp->ibqp.qp_num = qp_num;
 660         qp = &iwqp->sc_qp;
 661         iwqp->iwscq = to_iwcq(init_attr->send_cq);
 662         iwqp->iwrcq = to_iwcq(init_attr->recv_cq);
 663
 664         iwqp->host_ctx.va = init_info.host_ctx;
 665         iwqp->host_ctx.pa = init_info.host_ctx_pa;
 666         iwqp->host_ctx.size = I40IW_QP_CTX_SIZE;
 667
 668         init_info.pd = &iwpd->sc_pd;
 669         init_info.qp_uk_init_info.qp_id = iwqp->ibqp.qp_num;
 670         iwqp->ctx_info.qp_compl_ctx = (uintptr_t)qp;
 671
 672         if (init_attr->qp_type != IB_QPT_RC) {
 673                 err_code = -ENOSYS;
 674                 goto error;
 675         }
 676         if (iwdev->push_mode)
 677                 i40iw_alloc_push_page(iwdev, qp);
 678         if (udata) {
 679                 err_code = ib_copy_from_udata(&req, udata, sizeof(req));
 680                 if (err_code) {
 681                         i40iw_pr_err("ib_copy_from_data\n");
 682                         goto error;
 683                 }
 684                 iwqp->ctx_info.qp_compl_ctx = req.user_compl_ctx;
 685                 if (ibpd->uobject && ibpd->uobject->context) {
 686                         iwqp->user_mode = 1;
 687                         ucontext = to_ucontext(ibpd->uobject->context);
 688
 689                         if (req.user_wqe_buffers) {
 690                                 spin_lock_irqsave(
 691                                     &ucontext->qp_reg_mem_list_lock, flags);
 692                                 iwqp->iwpbl = i40iw_get_pbl(
 693                                     (unsigned long)req.user_wqe_buffers,
 694                                     &ucontext->qp_reg_mem_list);
 695                                 spin_unlock_irqrestore(
 696                                     &ucontext->qp_reg_mem_list_lock, flags);
 697
 698                                 if (!iwqp->iwpbl) {
 699                                         err_code = -ENODATA;
 700                                         i40iw_pr_err("no pbl info\n");
 701                                         goto error;
 702                                 }
 703                         }
 704                 }
 705                 err_code = i40iw_setup_virt_qp(iwdev, iwqp, &init_info);
 706         } else {
 707                 err_code = i40iw_setup_kmode_qp(iwdev, iwqp, &init_info);
 708         }
 709
 710         if (err_code) {
 711                 i40iw_pr_err("setup qp failed\n");
 712                 goto error;
 713         }
 714
 715         init_info.type = I40IW_QP_TYPE_IWARP;
 716         ret = dev->iw_priv_qp_ops->qp_init(qp, &init_info);
 717         if (ret) {
 718                 err_code = -EPROTO;
 719                 i40iw_pr_err("qp_init fail\n");
 720                 goto error;
 721         }
 722         ctx_info = &iwqp->ctx_info;
 723         iwarp_info = &iwqp->iwarp_info;
 724         iwarp_info->rd_enable = true;
 725         iwarp_info->wr_rdresp_en = true;
 726         if (!iwqp->user_mode) {
 727                 iwarp_info->fast_reg_en = true;
 728                 iwarp_info->priv_mode_en = true;
 729         }
 730         iwarp_info->ddp_ver = 1;
 731         iwarp_info->rdmap_ver = 1;
 732
 733         ctx_info->iwarp_info_valid = true;
 734         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
 735         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
 736         if (qp->push_idx == I40IW_INVALID_PUSH_PAGE_INDEX) {
 737                 ctx_info->push_mode_en = false;
 738         } else {
 739                 ctx_info->push_mode_en = true;
 740                 ctx_info->push_idx = qp->push_idx;
 741         }
 742
 743         ret = dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp,
 744                                              (u64 *)iwqp->host_ctx.va,
 745                                              ctx_info);
 746         ctx_info->iwarp_info_valid = false;
 747         cqp_request = i40iw_get_cqp_request(iwcqp, true);
 748         if (!cqp_request) {
 749                 err_code = -ENOMEM;
 750                 goto error;
 751         }
 752         cqp_info = &cqp_request->info;
 753         qp_info = &cqp_request->info.in.u.qp_create.info;
 754
 755         memset(qp_info, 0, sizeof(*qp_info));
 756
 757         qp_info->cq_num_valid = true;
 758         qp_info->next_iwarp_state = I40IW_QP_STATE_IDLE;
 759
 760         cqp_info->cqp_cmd = OP_QP_CREATE;
 761         cqp_info->post_sq = 1;
 762         cqp_info->in.u.qp_create.qp = qp;
 763         cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
 764         ret = i40iw_handle_cqp_op(iwdev, cqp_request);
 765         if (ret) {
 766                 i40iw_pr_err("CQP-OP QP create fail");
 767                 err_code = -EACCES;
 768                 goto error;
 769         }
 770
 771         i40iw_add_ref(&iwqp->ibqp);
 772         spin_lock_init(&iwqp->lock);
 773         iwqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
 774         iwdev->qp_table[qp_num] = iwqp;
 775         i40iw_add_pdusecount(iwqp->iwpd);
 776         if (ibpd->uobject && udata) {
 777                 memset(&uresp, 0, sizeof(uresp));
 778                 uresp.actual_sq_size = sq_size;
 779                 uresp.actual_rq_size = rq_size;
 780                 uresp.qp_id = qp_num;
 781                 uresp.push_idx = qp->push_idx;
 782                 err_code = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
 783                 if (err_code) {
 784                         i40iw_pr_err("copy_to_udata failed\n");
 785                         i40iw_destroy_qp(&iwqp->ibqp);
 786                            /* let the completion of the qp destroy free the qp */
 787                         return ERR_PTR(err_code);
 788                 }
 789         }
 790         init_completion(&iwqp->sq_drained);
 791         init_completion(&iwqp->rq_drained);
 792
 793         return &iwqp->ibqp;
 794 error:
 795         i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 796         kfree(mem);
 797         return ERR_PTR(err_code);
 798 }
 799
 800 /**
 801  * i40iw_query - query qp attributes
 802  * @ibqp: qp pointer
 803  * @attr: attributes pointer
 804  * @attr_mask: Not used
 805  * @init_attr: qp attributes to return
 806  */
 807 static int i40iw_query_qp(struct ib_qp *ibqp,
 808                           struct ib_qp_attr *attr,
 809                           int attr_mask,
 810                           struct ib_qp_init_attr *init_attr)
 811 {
 812         struct i40iw_qp *iwqp = to_iwqp(ibqp);
 813         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
 814
 815         attr->qp_access_flags = 0;
 816         attr->cap.max_send_wr = qp->qp_uk.sq_size;
 817         attr->cap.max_recv_wr = qp->qp_uk.rq_size;
 818         attr->cap.max_recv_sge = 1;
 819         attr->cap.max_inline_data = I40IW_MAX_INLINE_DATA_SIZE;
 820         init_attr->event_handler = iwqp->ibqp.event_handler;
 821         init_attr->qp_context = iwqp->ibqp.qp_context;
 822         init_attr->send_cq = iwqp->ibqp.send_cq;
 823         init_attr->recv_cq = iwqp->ibqp.recv_cq;
 824         init_attr->srq = iwqp->ibqp.srq;
 825         init_attr->cap = attr->cap;
 826         return 0;
 827 }
 828
 829 /**
 830  * i40iw_hw_modify_qp - setup cqp for modify qp
 831  * @iwdev: iwarp device
 832  * @iwqp: qp ptr (user or kernel)
 833  * @info: info for modify qp
 834  * @wait: flag to wait or not for modify qp completion
 835  */
 836 void i40iw_hw_modify_qp(struct i40iw_device *iwdev, struct i40iw_qp *iwqp,
 837                         struct i40iw_modify_qp_info *info, bool wait)
 838 {
 839         enum i40iw_status_code status;
 840         struct i40iw_cqp_request *cqp_request;
 841         struct cqp_commands_info *cqp_info;
 842         struct i40iw_modify_qp_info *m_info;
 843
 844         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, wait);
 845         if (!cqp_request)
 846                 return;
 847
 848         cqp_info = &cqp_request->info;
 849         m_info = &cqp_info->in.u.qp_modify.info;
 850         memcpy(m_info, info, sizeof(*m_info));
 851         cqp_info->cqp_cmd = OP_QP_MODIFY;
 852         cqp_info->post_sq = 1;
 853         cqp_info->in.u.qp_modify.qp = &iwqp->sc_qp;
 854         cqp_info->in.u.qp_modify.scratch = (uintptr_t)cqp_request;
 855         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 856         if (status)
 857                 i40iw_pr_err("CQP-OP Modify QP fail");
 858 }
 859
 860 /**
 861  * i40iw_modify_qp - modify qp request
 862  * @ibqp: qp's pointer for modify
 863  * @attr: access attributes
 864  * @attr_mask: state mask
 865  * @udata: user data
 866  */
 867 int i40iw_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 868                     int attr_mask, struct ib_udata *udata)
 869 {
 870         struct i40iw_qp *iwqp = to_iwqp(ibqp);
 871         struct i40iw_device *iwdev = iwqp->iwdev;
 872         struct i40iw_qp_host_ctx_info *ctx_info;
 873         struct i40iwarp_offload_info *iwarp_info;
 874         struct i40iw_modify_qp_info info;
 875         u8 issue_modify_qp = 0;
 876         u8 dont_wait = 0;
 877         u32 err;
 878         unsigned long flags;
 879
 880         memset(&info, 0, sizeof(info));
 881         ctx_info = &iwqp->ctx_info;
 882         iwarp_info = &iwqp->iwarp_info;
 883
 884         spin_lock_irqsave(&iwqp->lock, flags);
 885
 886         if (attr_mask & IB_QP_STATE) {
 887                 switch (attr->qp_state) {
 888                 case IB_QPS_INIT:
 889                 case IB_QPS_RTR:
 890                         if (iwqp->iwarp_state > (u32)I40IW_QP_STATE_IDLE) {
 891                                 err = -EINVAL;
 892                                 goto exit;
 893                         }
 894                         if (iwqp->iwarp_state == I40IW_QP_STATE_INVALID) {
 895                                 info.next_iwarp_state = I40IW_QP_STATE_IDLE;
 896                                 issue_modify_qp = 1;
 897                         }
 898                         break;
 899                 case IB_QPS_RTS:
 900                         if ((iwqp->iwarp_state > (u32)I40IW_QP_STATE_RTS) ||
 901                             (!iwqp->cm_id)) {
 902                                 err = -EINVAL;
 903                                 goto exit;
 904                         }
 905
 906                         issue_modify_qp = 1;
 907                         iwqp->hw_tcp_state = I40IW_TCP_STATE_ESTABLISHED;
 908                         iwqp->hte_added = 1;
 909                         info.next_iwarp_state = I40IW_QP_STATE_RTS;
 910                         info.tcp_ctx_valid = true;
 911                         info.ord_valid = true;
 912                         info.arp_cache_idx_valid = true;
 913                         info.cq_num_valid = true;
 914                         break;
 915                 case IB_QPS_SQD:
 916                         if (iwqp->hw_iwarp_state > (u32)I40IW_QP_STATE_RTS) {
 917                                 err = 0;
 918                                 goto exit;
 919                         }
 920                         if ((iwqp->iwarp_state == (u32)I40IW_QP_STATE_CLOSING) ||
 921                             (iwqp->iwarp_state < (u32)I40IW_QP_STATE_RTS)) {
 922                                 err = 0;
 923                                 goto exit;
 924                         }
 925                         if (iwqp->iwarp_state > (u32)I40IW_QP_STATE_CLOSING) {
 926                                 err = -EINVAL;
 927                                 goto exit;
 928                         }
 929                         info.next_iwarp_state = I40IW_QP_STATE_CLOSING;
 930                         issue_modify_qp = 1;
 931                         break;
 932                 case IB_QPS_SQE:
 933                         if (iwqp->iwarp_state >= (u32)I40IW_QP_STATE_TERMINATE) {
 934                                 err = -EINVAL;
 935                                 goto exit;
 936                         }
 937                         info.next_iwarp_state = I40IW_QP_STATE_TERMINATE;
 938                         issue_modify_qp = 1;
 939                         break;
 940                 case IB_QPS_ERR:
 941                 case IB_QPS_RESET:
 942                         if (iwqp->iwarp_state == (u32)I40IW_QP_STATE_ERROR) {
 943                                 err = -EINVAL;
 944                                 goto exit;
 945                         }
 946                         if (iwqp->sc_qp.term_flags)
 947                                 del_timer(&iwqp->terminate_timer);
 948                         info.next_iwarp_state = I40IW_QP_STATE_ERROR;
 949                         if ((iwqp->hw_tcp_state > I40IW_TCP_STATE_CLOSED) &&
 950                             iwdev->iw_status &&
 951                             (iwqp->hw_tcp_state != I40IW_TCP_STATE_TIME_WAIT))
 952                                 info.reset_tcp_conn = true;
 953                         else
 954                                 dont_wait = 1;
 955                         issue_modify_qp = 1;
 956                         info.next_iwarp_state = I40IW_QP_STATE_ERROR;
 957                         break;
 958                 default:
 959                         err = -EINVAL;
 960                         goto exit;
 961                 }
 962
 963                 iwqp->ibqp_state = attr->qp_state;
 964
 965                 if (issue_modify_qp)
 966                         iwqp->iwarp_state = info.next_iwarp_state;
 967                 else
 968                         info.next_iwarp_state = iwqp->iwarp_state;
 969         }
 970         if (attr_mask & IB_QP_ACCESS_FLAGS) {
 971                 ctx_info->iwarp_info_valid = true;
 972                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE)
 973                         iwarp_info->wr_rdresp_en = true;
 974                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE)
 975                         iwarp_info->wr_rdresp_en = true;
 976                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ)
 977                         iwarp_info->rd_enable = true;
 978                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND)
 979                         iwarp_info->bind_en = true;
 980
 981                 if (iwqp->user_mode) {
 982                         iwarp_info->rd_enable = true;
 983                         iwarp_info->wr_rdresp_en = true;
 984                         iwarp_info->priv_mode_en = false;
 985                 }
 986         }
 987
 988         if (ctx_info->iwarp_info_valid) {
 989                 struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 990                 int ret;
 991
 992                 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
 993                 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
 994                 ret = dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp,
 995                                                      (u64 *)iwqp->host_ctx.va,
 996                                                      ctx_info);
 997                 if (ret) {
 998                         i40iw_pr_err("setting QP context\n");
 999                         err = -EINVAL;
1000                         goto exit;
1001                 }
1002         }
1003
1004         spin_unlock_irqrestore(&iwqp->lock, flags);
1005
1006         if (issue_modify_qp)
1007                 i40iw_hw_modify_qp(iwdev, iwqp, &info, true);
1008
1009         if (issue_modify_qp && (iwqp->ibqp_state > IB_QPS_RTS)) {
1010                 if (dont_wait) {
1011                         if (iwqp->cm_id && iwqp->hw_tcp_state) {
1012                                 spin_lock_irqsave(&iwqp->lock, flags);
1013                                 iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1014                                 iwqp->last_aeq = I40IW_AE_RESET_SENT;
1015                                 spin_unlock_irqrestore(&iwqp->lock, flags);
1016                         }
1017                 }
1018         }
1019         return 0;
1020 exit:
1021         spin_unlock_irqrestore(&iwqp->lock, flags);
1022         return err;
1023 }
1024
1025 /**
1026  * cq_free_resources - free up recources for cq
1027  * @iwdev: iwarp device
1028  * @iwcq: cq ptr
1029  */
1030 static void cq_free_resources(struct i40iw_device *iwdev, struct i40iw_cq *iwcq)
1031 {
1032         struct i40iw_sc_cq *cq = &iwcq->sc_cq;
1033
1034         if (!iwcq->user_mode)
1035                 i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwcq->kmem);
1036         i40iw_free_resource(iwdev, iwdev->allocated_cqs, cq->cq_uk.cq_id);
1037 }
1038
1039 /**
1040  * cq_wq_destroy - send cq destroy cqp
1041  * @iwdev: iwarp device
1042  * @cq: hardware control cq
1043  */
1044 static void cq_wq_destroy(struct i40iw_device *iwdev, struct i40iw_sc_cq *cq)
1045 {
1046         enum i40iw_status_code status;
1047         struct i40iw_cqp_request *cqp_request;
1048         struct cqp_commands_info *cqp_info;
1049
1050         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1051         if (!cqp_request)
1052                 return;
1053
1054         cqp_info = &cqp_request->info;
1055
1056         cqp_info->cqp_cmd = OP_CQ_DESTROY;
1057         cqp_info->post_sq = 1;
1058         cqp_info->in.u.cq_destroy.cq = cq;
1059         cqp_info->in.u.cq_destroy.scratch = (uintptr_t)cqp_request;
1060         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1061         if (status)
1062                 i40iw_pr_err("CQP-OP Destroy QP fail");
1063 }
1064
1065 /**
1066  * i40iw_destroy_cq - destroy cq
1067  * @ib_cq: cq pointer
1068  */
1069 static int i40iw_destroy_cq(struct ib_cq *ib_cq)
1070 {
1071         struct i40iw_cq *iwcq;
1072         struct i40iw_device *iwdev;
1073         struct i40iw_sc_cq *cq;
1074
1075         if (!ib_cq) {
1076                 i40iw_pr_err("ib_cq == NULL\n");
1077                 return 0;
1078         }
1079
1080         iwcq = to_iwcq(ib_cq);
1081         iwdev = to_iwdev(ib_cq->device);
1082         cq = &iwcq->sc_cq;
1083         cq_wq_destroy(iwdev, cq);
1084         cq_free_resources(iwdev, iwcq);
1085         kfree(iwcq);
1086         return 0;
1087 }
1088
1089 /**
1090  * i40iw_create_cq - create cq
1091  * @ibdev: device pointer from stack
1092  * @attr: attributes for cq
1093  * @context: user context created during alloc
1094  * @udata: user data
1095  */
1096 static struct ib_cq *i40iw_create_cq(struct ib_device *ibdev,
1097                                      const struct ib_cq_init_attr *attr,
1098                                      struct ib_ucontext *context,
1099                                      struct ib_udata *udata)
1100 {
1101         struct i40iw_device *iwdev = to_iwdev(ibdev);
1102         struct i40iw_cq *iwcq;
1103         struct i40iw_pbl *iwpbl;
1104         u32 cq_num = 0;
1105         struct i40iw_sc_cq *cq;
1106         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
1107         struct i40iw_cq_init_info info;
1108         enum i40iw_status_code status;
1109         struct i40iw_cqp_request *cqp_request;
1110         struct cqp_commands_info *cqp_info;
1111         struct i40iw_cq_uk_init_info *ukinfo = &info.cq_uk_init_info;
1112         unsigned long flags;
1113         int err_code;
1114         int entries = attr->cqe;
1115
1116         if (entries > iwdev->max_cqe)
1117                 return ERR_PTR(-EINVAL);
1118
1119         iwcq = kzalloc(sizeof(*iwcq), GFP_KERNEL);
1120         if (!iwcq)
1121                 return ERR_PTR(-ENOMEM);
1122
1123         memset(&info, 0, sizeof(info));
1124
1125         err_code = i40iw_alloc_resource(iwdev, iwdev->allocated_cqs,
1126                                         iwdev->max_cq, &cq_num,
1127                                         &iwdev->next_cq);
1128         if (err_code)
1129                 goto error;
1130
1131         cq = &iwcq->sc_cq;
1132         cq->back_cq = (void *)iwcq;
1133         spin_lock_init(&iwcq->lock);
1134
1135         info.dev = dev;
1136         ukinfo->cq_size = max(entries, 4);
1137         ukinfo->cq_id = cq_num;
1138         iwcq->ibcq.cqe = info.cq_uk_init_info.cq_size;
1139         info.ceqe_mask = 0;
1140         info.ceq_id = 0;
1141         info.ceq_id_valid = true;
1142         info.ceqe_mask = 1;
1143         info.type = I40IW_CQ_TYPE_IWARP;
1144         if (context) {
1145                 struct i40iw_ucontext *ucontext;
1146                 struct i40iw_create_cq_req req;
1147                 struct i40iw_cq_mr *cqmr;
1148
1149                 memset(&req, 0, sizeof(req));
1150                 iwcq->user_mode = true;
1151                 ucontext = to_ucontext(context);
1152                 if (ib_copy_from_udata(&req, udata, sizeof(struct i40iw_create_cq_req)))
1153                         goto cq_free_resources;
1154
1155                 spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
1156                 iwpbl = i40iw_get_pbl((unsigned long)req.user_cq_buffer,
1157                                       &ucontext->cq_reg_mem_list);
1158                 spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
1159                 if (!iwpbl) {
1160                         err_code = -EPROTO;
1161                         goto cq_free_resources;
1162                 }
1163
1164                 iwcq->iwpbl = iwpbl;
1165                 iwcq->cq_mem_size = 0;
1166                 cqmr = &iwpbl->cq_mr;
1167                 info.shadow_area_pa = cpu_to_le64(cqmr->shadow);
1168                 if (iwpbl->pbl_allocated) {
1169                         info.virtual_map = true;
1170                         info.pbl_chunk_size = 1;
1171                         info.first_pm_pbl_idx = cqmr->cq_pbl.idx;
1172                 } else {
1173                         info.cq_base_pa = cqmr->cq_pbl.addr;
1174                 }
1175         } else {
1176                 /* Kmode allocations */
1177                 int rsize;
1178                 int shadow;
1179
1180                 rsize = info.cq_uk_init_info.cq_size * sizeof(struct i40iw_cqe);
1181                 rsize = round_up(rsize, 256);
1182                 shadow = I40IW_SHADOW_AREA_SIZE << 3;
1183                 status = i40iw_allocate_dma_mem(dev->hw, &iwcq->kmem,
1184                                                 rsize + shadow, 256);
1185                 if (status) {
1186                         err_code = -ENOMEM;
1187                         goto cq_free_resources;
1188                 }
1189                 ukinfo->cq_base = iwcq->kmem.va;
1190                 info.cq_base_pa = iwcq->kmem.pa;
1191                 info.shadow_area_pa = info.cq_base_pa + rsize;
1192                 ukinfo->shadow_area = iwcq->kmem.va + rsize;
1193         }
1194
1195         if (dev->iw_priv_cq_ops->cq_init(cq, &info)) {
1196                 i40iw_pr_err("init cq fail\n");
1197                 err_code = -EPROTO;
1198                 goto cq_free_resources;
1199         }
1200
1201         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1202         if (!cqp_request) {
1203                 err_code = -ENOMEM;
1204                 goto cq_free_resources;
1205         }
1206
1207         cqp_info = &cqp_request->info;
1208         cqp_info->cqp_cmd = OP_CQ_CREATE;
1209         cqp_info->post_sq = 1;
1210         cqp_info->in.u.cq_create.cq = cq;
1211         cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1212         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1213         if (status) {
1214                 i40iw_pr_err("CQP-OP Create QP fail");
1215                 err_code = -EPROTO;
1216                 goto cq_free_resources;
1217         }
1218
1219         if (context) {
1220                 struct i40iw_create_cq_resp resp;
1221
1222                 memset(&resp, 0, sizeof(resp));
1223                 resp.cq_id = info.cq_uk_init_info.cq_id;
1224                 resp.cq_size = info.cq_uk_init_info.cq_size;
1225                 if (ib_copy_to_udata(udata, &resp, sizeof(resp))) {
1226                         i40iw_pr_err("copy to user data\n");
1227                         err_code = -EPROTO;
1228                         goto cq_destroy;
1229                 }
1230         }
1231
1232         return (struct ib_cq *)iwcq;
1233
1234 cq_destroy:
1235         cq_wq_destroy(iwdev, cq);
1236 cq_free_resources:
1237         cq_free_resources(iwdev, iwcq);
1238 error:
1239         kfree(iwcq);
1240         return ERR_PTR(err_code);
1241 }
1242
1243 /**
1244  * i40iw_get_user_access - get hw access from IB access
1245  * @acc: IB access to return hw access
1246  */
1247 static inline u16 i40iw_get_user_access(int acc)
1248 {
1249         u16 access = 0;
1250
1251         access |= (acc & IB_ACCESS_LOCAL_WRITE) ? I40IW_ACCESS_FLAGS_LOCALWRITE : 0;
1252         access |= (acc & IB_ACCESS_REMOTE_WRITE) ? I40IW_ACCESS_FLAGS_REMOTEWRITE : 0;
1253         access |= (acc & IB_ACCESS_REMOTE_READ) ? I40IW_ACCESS_FLAGS_REMOTEREAD : 0;
1254         access |= (acc & IB_ACCESS_MW_BIND) ? I40IW_ACCESS_FLAGS_BIND_WINDOW : 0;
1255         return access;
1256 }
1257
1258 /**
1259  * i40iw_free_stag - free stag resource
1260  * @iwdev: iwarp device
1261  * @stag: stag to free
1262  */
1263 static void i40iw_free_stag(struct i40iw_device *iwdev, u32 stag)
1264 {
1265         u32 stag_idx;
1266
1267         stag_idx = (stag & iwdev->mr_stagmask) >> I40IW_CQPSQ_STAG_IDX_SHIFT;
1268         i40iw_free_resource(iwdev, iwdev->allocated_mrs, stag_idx);
1269 }
1270
1271 /**
1272  * i40iw_create_stag - create random stag
1273  * @iwdev: iwarp device
1274  */
1275 static u32 i40iw_create_stag(struct i40iw_device *iwdev)
1276 {
1277         u32 stag = 0;
1278         u32 stag_index = 0;
1279         u32 next_stag_index;
1280         u32 driver_key;
1281         u32 random;
1282         u8 consumer_key;
1283         int ret;
1284
1285         get_random_bytes(&random, sizeof(random));
1286         consumer_key = (u8)random;
1287
1288         driver_key = random & ~iwdev->mr_stagmask;
1289         next_stag_index = (random & iwdev->mr_stagmask) >> 8;
1290         next_stag_index %= iwdev->max_mr;
1291
1292         ret = i40iw_alloc_resource(iwdev,
1293                                    iwdev->allocated_mrs, iwdev->max_mr,
1294                                    &stag_index, &next_stag_index);
1295         if (!ret) {
1296                 stag = stag_index << I40IW_CQPSQ_STAG_IDX_SHIFT;
1297                 stag |= driver_key;
1298                 stag += (u32)consumer_key;
1299         }
1300         return stag;
1301 }
1302
1303 /**
1304  * i40iw_next_pbl_addr - Get next pbl address
1305  * @palloc: Poiner to allocated pbles
1306  * @pbl: pointer to a pble
1307  * @pinfo: info pointer
1308  * @idx: index
1309  */
1310 static inline u64 *i40iw_next_pbl_addr(struct i40iw_pble_alloc *palloc,
1311                                        u64 *pbl,
1312                                        struct i40iw_pble_info **pinfo,
1313                                        u32 *idx)
1314 {
1315         *idx += 1;
1316         if ((!(*pinfo)) || (*idx != (*pinfo)->cnt))
1317                 return ++pbl;
1318         *idx = 0;
1319         (*pinfo)++;
1320         return (u64 *)(*pinfo)->addr;
1321 }
1322
1323 /**
1324  * i40iw_copy_user_pgaddrs - copy user page address to pble's os locally
1325  * @iwmr: iwmr for IB's user page addresses
1326  * @pbl: ple pointer to save 1 level or 0 level pble
1327  * @level: indicated level 0, 1 or 2
1328  */
1329 static void i40iw_copy_user_pgaddrs(struct i40iw_mr *iwmr,
1330                                     u64 *pbl,
1331                                     enum i40iw_pble_level level)
1332 {
1333         struct ib_umem *region = iwmr->region;
1334         struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
1335         int chunk_pages, entry, pg_shift, i;
1336         struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
1337         struct i40iw_pble_info *pinfo;
1338         struct scatterlist *sg;
1339         u32 idx = 0;
1340
1341         pinfo = (level == I40IW_LEVEL_1) ? NULL : palloc->level2.leaf;
1342         pg_shift = ffs(region->page_size) - 1;
1343         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
1344                 chunk_pages = sg_dma_len(sg) >> pg_shift;
1345                 if ((iwmr->type == IW_MEMREG_TYPE_QP) &&
1346                     !iwpbl->qp_mr.sq_page)
1347                         iwpbl->qp_mr.sq_page = sg_page(sg);
1348                 for (i = 0; i < chunk_pages; i++) {
1349                         *pbl = cpu_to_le64(sg_dma_address(sg) + region->page_size * i);
1350                         pbl = i40iw_next_pbl_addr(palloc, pbl, &pinfo, &idx);
1351                 }
1352         }
1353 }
1354
1355 /**
1356  * i40iw_setup_pbles - copy user pg address to pble's
1357  * @iwdev: iwarp device
1358  * @iwmr: mr pointer for this memory registration
1359  * @use_pbles: flag if to use pble's or memory (level 0)
1360  */
1361 static int i40iw_setup_pbles(struct i40iw_device *iwdev,
1362                              struct i40iw_mr *iwmr,
1363                              bool use_pbles)
1364 {
1365         struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
1366         struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
1367         struct i40iw_pble_info *pinfo;
1368         u64 *pbl;
1369         enum i40iw_status_code status;
1370         enum i40iw_pble_level level = I40IW_LEVEL_1;
1371
1372         if (!use_pbles && (iwmr->page_cnt > MAX_SAVE_PAGE_ADDRS))
1373                 return -ENOMEM;
1374
1375         if (use_pbles) {
1376                 mutex_lock(&iwdev->pbl_mutex);
1377                 status = i40iw_get_pble(&iwdev->sc_dev, iwdev->pble_rsrc, palloc, iwmr->page_cnt);
1378                 mutex_unlock(&iwdev->pbl_mutex);
1379                 if (status)
1380                         return -ENOMEM;
1381
1382                 iwpbl->pbl_allocated = true;
1383                 level = palloc->level;
1384                 pinfo = (level == I40IW_LEVEL_1) ? &palloc->level1 : palloc->level2.leaf;
1385                 pbl = (u64 *)pinfo->addr;
1386         } else {
1387                 pbl = iwmr->pgaddrmem;
1388         }
1389
1390         i40iw_copy_user_pgaddrs(iwmr, pbl, level);
1391         return 0;
1392 }
1393
1394 /**
1395  * i40iw_handle_q_mem - handle memory for qp and cq
1396  * @iwdev: iwarp device
1397  * @req: information for q memory management
1398  * @iwpbl: pble struct
1399  * @use_pbles: flag to use pble
1400  */
1401 static int i40iw_handle_q_mem(struct i40iw_device *iwdev,
1402                               struct i40iw_mem_reg_req *req,
1403                               struct i40iw_pbl *iwpbl,
1404                               bool use_pbles)
1405 {
1406         struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
1407         struct i40iw_mr *iwmr = iwpbl->iwmr;
1408         struct i40iw_qp_mr *qpmr = &iwpbl->qp_mr;
1409         struct i40iw_cq_mr *cqmr = &iwpbl->cq_mr;
1410         struct i40iw_hmc_pble *hmc_p;
1411         u64 *arr = iwmr->pgaddrmem;
1412         int err;
1413         int total;
1414
1415         total = req->sq_pages + req->rq_pages + req->cq_pages;
1416
1417         err = i40iw_setup_pbles(iwdev, iwmr, use_pbles);
1418         if (err)
1419                 return err;
1420         if (use_pbles && (palloc->level != I40IW_LEVEL_1)) {
1421                 i40iw_free_pble(iwdev->pble_rsrc, palloc);
1422                 iwpbl->pbl_allocated = false;
1423                 return -ENOMEM;
1424         }
1425
1426         if (use_pbles)
1427                 arr = (u64 *)palloc->level1.addr;
1428         if (req->reg_type == IW_MEMREG_TYPE_QP) {
1429                 hmc_p = &qpmr->sq_pbl;
1430                 qpmr->shadow = (dma_addr_t)arr[total];
1431                 if (use_pbles) {
1432                         hmc_p->idx = palloc->level1.idx;
1433                         hmc_p = &qpmr->rq_pbl;
1434                         hmc_p->idx = palloc->level1.idx + req->sq_pages;
1435                 } else {
1436                         hmc_p->addr = arr[0];
1437                         hmc_p = &qpmr->rq_pbl;
1438                         hmc_p->addr = arr[1];
1439                 }
1440         } else {                /* CQ */
1441                 hmc_p = &cqmr->cq_pbl;
1442                 cqmr->shadow = (dma_addr_t)arr[total];
1443                 if (use_pbles)
1444                         hmc_p->idx = palloc->level1.idx;
1445                 else
1446                         hmc_p->addr = arr[0];
1447         }
1448         return err;
1449 }
1450
1451 /**
1452  * i40iw_hw_alloc_stag - cqp command to allocate stag
1453  * @iwdev: iwarp device
1454  * @iwmr: iwarp mr pointer
1455  */
1456 static int i40iw_hw_alloc_stag(struct i40iw_device *iwdev, struct i40iw_mr *iwmr)
1457 {
1458         struct i40iw_allocate_stag_info *info;
1459         struct i40iw_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
1460         enum i40iw_status_code status;
1461         int err = 0;
1462         struct i40iw_cqp_request *cqp_request;
1463         struct cqp_commands_info *cqp_info;
1464
1465         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1466         if (!cqp_request)
1467                 return -ENOMEM;
1468
1469         cqp_info = &cqp_request->info;
1470         info = &cqp_info->in.u.alloc_stag.info;
1471         memset(info, 0, sizeof(*info));
1472         info->page_size = PAGE_SIZE;
1473         info->stag_idx = iwmr->stag >> I40IW_CQPSQ_STAG_IDX_SHIFT;
1474         info->pd_id = iwpd->sc_pd.pd_id;
1475         info->total_len = iwmr->length;
1476         cqp_info->cqp_cmd = OP_ALLOC_STAG;
1477         cqp_info->post_sq = 1;
1478         cqp_info->in.u.alloc_stag.dev = &iwdev->sc_dev;
1479         cqp_info->in.u.alloc_stag.scratch = (uintptr_t)cqp_request;
1480
1481         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1482         if (status) {
1483                 err = -ENOMEM;
1484                 i40iw_pr_err("CQP-OP MR Reg fail");
1485         }
1486         return err;
1487 }
1488
1489 /**
1490  * i40iw_alloc_mr - register stag for fast memory registration
1491  * @pd: ibpd pointer
1492  * @mr_type: memory for stag registrion
1493  * @max_num_sg: man number of pages
1494  */
1495 static struct ib_mr *i40iw_alloc_mr(struct ib_pd *pd,
1496                                     enum ib_mr_type mr_type,
1497                                     u32 max_num_sg)
1498 {
1499         struct i40iw_pd *iwpd = to_iwpd(pd);
1500         struct i40iw_device *iwdev = to_iwdev(pd->device);
1501         struct i40iw_pble_alloc *palloc;
1502         struct i40iw_pbl *iwpbl;
1503         struct i40iw_mr *iwmr;
1504         enum i40iw_status_code status;
1505         u32 stag;
1506         int err_code = -ENOMEM;
1507
1508         iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
1509         if (!iwmr)
1510                 return ERR_PTR(-ENOMEM);
1511
1512         stag = i40iw_create_stag(iwdev);
1513         if (!stag) {
1514                 err_code = -EOVERFLOW;
1515                 goto err;
1516         }
1517         iwmr->stag = stag;
1518         iwmr->ibmr.rkey = stag;
1519         iwmr->ibmr.lkey = stag;
1520         iwmr->ibmr.pd = pd;
1521         iwmr->ibmr.device = pd->device;
1522         iwpbl = &iwmr->iwpbl;
1523         iwpbl->iwmr = iwmr;
1524         iwmr->type = IW_MEMREG_TYPE_MEM;
1525         palloc = &iwpbl->pble_alloc;
1526         iwmr->page_cnt = max_num_sg;
1527         mutex_lock(&iwdev->pbl_mutex);
1528         status = i40iw_get_pble(&iwdev->sc_dev, iwdev->pble_rsrc, palloc, iwmr->page_cnt);
1529         mutex_unlock(&iwdev->pbl_mutex);
1530         if (!status)
1531                 goto err1;
1532
1533         if (palloc->level != I40IW_LEVEL_1)
1534                 goto err2;
1535         err_code = i40iw_hw_alloc_stag(iwdev, iwmr);
1536         if (err_code)
1537                 goto err2;
1538         iwpbl->pbl_allocated = true;
1539         i40iw_add_pdusecount(iwpd);
1540         return &iwmr->ibmr;
1541 err2:
1542         i40iw_free_pble(iwdev->pble_rsrc, palloc);
1543 err1:
1544         i40iw_free_stag(iwdev, stag);
1545 err:
1546         kfree(iwmr);
1547         return ERR_PTR(err_code);
1548 }
1549
1550 /**
1551  * i40iw_set_page - populate pbl list for fmr
1552  * @ibmr: ib mem to access iwarp mr pointer
1553  * @addr: page dma address fro pbl list
1554  */
1555 static int i40iw_set_page(struct ib_mr *ibmr, u64 addr)
1556 {
1557         struct i40iw_mr *iwmr = to_iwmr(ibmr);
1558         struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
1559         struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
1560         u64 *pbl;
1561
1562         if (unlikely(iwmr->npages == iwmr->page_cnt))
1563                 return -ENOMEM;
1564
1565         pbl = (u64 *)palloc->level1.addr;
1566         pbl[iwmr->npages++] = cpu_to_le64(addr);
1567         return 0;
1568 }
1569
1570 /**
1571  * i40iw_map_mr_sg - map of sg list for fmr
1572  * @ibmr: ib mem to access iwarp mr pointer
1573  * @sg: scatter gather list for fmr
1574  * @sg_nents: number of sg pages
1575  */
1576 static int i40iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents)
1577 {
1578         struct i40iw_mr *iwmr = to_iwmr(ibmr);
1579
1580         iwmr->npages = 0;
1581         return ib_sg_to_pages(ibmr, sg, sg_nents, i40iw_set_page);
1582 }
1583
1584 /**
1585  * i40iw_drain_sq - drain the send queue
1586  * @ibqp: ib qp pointer
1587  */
1588 static void i40iw_drain_sq(struct ib_qp *ibqp)
1589 {
1590         struct i40iw_qp *iwqp = to_iwqp(ibqp);
1591         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
1592
1593         if (I40IW_RING_MORE_WORK(qp->qp_uk.sq_ring))
1594                 wait_for_completion(&iwqp->sq_drained);
1595 }
1596
1597 /**
1598  * i40iw_drain_rq - drain the receive queue
1599  * @ibqp: ib qp pointer
1600  */
1601 static void i40iw_drain_rq(struct ib_qp *ibqp)
1602 {
1603         struct i40iw_qp *iwqp = to_iwqp(ibqp);
1604         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
1605
1606         if (I40IW_RING_MORE_WORK(qp->qp_uk.rq_ring))
1607                 wait_for_completion(&iwqp->rq_drained);
1608 }
1609
1610 /**
1611  * i40iw_hwreg_mr - send cqp command for memory registration
1612  * @iwdev: iwarp device
1613  * @iwmr: iwarp mr pointer
1614  * @access: access for MR
1615  */
1616 static int i40iw_hwreg_mr(struct i40iw_device *iwdev,
1617                           struct i40iw_mr *iwmr,
1618                           u16 access)
1619 {
1620         struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
1621         struct i40iw_reg_ns_stag_info *stag_info;
1622         struct i40iw_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
1623         struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
1624         enum i40iw_status_code status;
1625         int err = 0;
1626         struct i40iw_cqp_request *cqp_request;
1627         struct cqp_commands_info *cqp_info;
1628
1629         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1630         if (!cqp_request)
1631                 return -ENOMEM;
1632
1633         cqp_info = &cqp_request->info;
1634         stag_info = &cqp_info->in.u.mr_reg_non_shared.info;
1635         memset(stag_info, 0, sizeof(*stag_info));
1636         stag_info->va = (void *)(unsigned long)iwpbl->user_base;
1637         stag_info->stag_idx = iwmr->stag >> I40IW_CQPSQ_STAG_IDX_SHIFT;
1638         stag_info->stag_key = (u8)iwmr->stag;
1639         stag_info->total_len = iwmr->length;
1640         stag_info->access_rights = access;
1641         stag_info->pd_id = iwpd->sc_pd.pd_id;
1642         stag_info->addr_type = I40IW_ADDR_TYPE_VA_BASED;
1643
1644         if (iwmr->page_cnt > 1) {
1645                 if (palloc->level == I40IW_LEVEL_1) {
1646                         stag_info->first_pm_pbl_index = palloc->level1.idx;
1647                         stag_info->chunk_size = 1;
1648                 } else {
1649                         stag_info->first_pm_pbl_index = palloc->level2.root.idx;
1650                         stag_info->chunk_size = 3;
1651                 }
1652         } else {
1653                 stag_info->reg_addr_pa = iwmr->pgaddrmem[0];
1654         }
1655
1656         cqp_info->cqp_cmd = OP_MR_REG_NON_SHARED;
1657         cqp_info->post_sq = 1;
1658         cqp_info->in.u.mr_reg_non_shared.dev = &iwdev->sc_dev;
1659         cqp_info->in.u.mr_reg_non_shared.scratch = (uintptr_t)cqp_request;
1660
1661         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1662         if (status) {
1663                 err = -ENOMEM;
1664                 i40iw_pr_err("CQP-OP MR Reg fail");
1665         }
1666         return err;
1667 }
1668
1669 /**
1670  * i40iw_reg_user_mr - Register a user memory region
1671  * @pd: ptr of pd
1672  * @start: virtual start address
1673  * @length: length of mr
1674  * @virt: virtual address
1675  * @acc: access of mr
1676  * @udata: user data
1677  */
1678 static struct ib_mr *i40iw_reg_user_mr(struct ib_pd *pd,
1679                                        u64 start,
1680                                        u64 length,
1681                                        u64 virt,
1682                                        int acc,
1683                                        struct ib_udata *udata)
1684 {
1685         struct i40iw_pd *iwpd = to_iwpd(pd);
1686         struct i40iw_device *iwdev = to_iwdev(pd->device);
1687         struct i40iw_ucontext *ucontext;
1688         struct i40iw_pble_alloc *palloc;
1689         struct i40iw_pbl *iwpbl;
1690         struct i40iw_mr *iwmr;
1691         struct ib_umem *region;
1692         struct i40iw_mem_reg_req req;
1693         u64 pbl_depth = 0;
1694         u32 stag = 0;
1695         u16 access;
1696         u64 region_length;
1697         bool use_pbles = false;
1698         unsigned long flags;
1699         int err = -ENOSYS;
1700
1701         if (length > I40IW_MAX_MR_SIZE)
1702                 return ERR_PTR(-EINVAL);
1703         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
1704         if (IS_ERR(region))
1705                 return (struct ib_mr *)region;
1706
1707         if (ib_copy_from_udata(&req, udata, sizeof(req))) {
1708                 ib_umem_release(region);
1709                 return ERR_PTR(-EFAULT);
1710         }
1711
1712         iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
1713         if (!iwmr) {
1714                 ib_umem_release(region);
1715                 return ERR_PTR(-ENOMEM);
1716         }
1717
1718         iwpbl = &iwmr->iwpbl;
1719         iwpbl->iwmr = iwmr;
1720         iwmr->region = region;
1721         iwmr->ibmr.pd = pd;
1722         iwmr->ibmr.device = pd->device;
1723         ucontext = to_ucontext(pd->uobject->context);
1724         region_length = region->length + (start & 0xfff);
1725         pbl_depth = region_length >> 12;
1726         pbl_depth += (region_length & (4096 - 1)) ? 1 : 0;
1727         iwmr->length = region->length;
1728
1729         iwpbl->user_base = virt;
1730         palloc = &iwpbl->pble_alloc;
1731
1732         iwmr->type = req.reg_type;
1733         iwmr->page_cnt = (u32)pbl_depth;
1734
1735         switch (req.reg_type) {
1736         case IW_MEMREG_TYPE_QP:
1737                 use_pbles = ((req.sq_pages + req.rq_pages) > 2);
1738                 err = i40iw_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
1739                 if (err)
1740                         goto error;
1741                 spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
1742                 list_add_tail(&iwpbl->list, &ucontext->qp_reg_mem_list);
1743                 spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
1744                 break;
1745         case IW_MEMREG_TYPE_CQ:
1746                 use_pbles = (req.cq_pages > 1);
1747                 err = i40iw_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
1748                 if (err)
1749                         goto error;
1750
1751                 spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
1752                 list_add_tail(&iwpbl->list, &ucontext->cq_reg_mem_list);
1753                 spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
1754                 break;
1755         case IW_MEMREG_TYPE_MEM:
1756                 access = I40IW_ACCESS_FLAGS_LOCALREAD;
1757
1758                 use_pbles = (iwmr->page_cnt != 1);
1759                 err = i40iw_setup_pbles(iwdev, iwmr, use_pbles);
1760                 if (err)
1761                         goto error;
1762
1763                 access |= i40iw_get_user_access(acc);
1764                 stag = i40iw_create_stag(iwdev);
1765                 if (!stag) {
1766                         err = -ENOMEM;
1767                         goto error;
1768                 }
1769
1770                 iwmr->stag = stag;
1771                 iwmr->ibmr.rkey = stag;
1772                 iwmr->ibmr.lkey = stag;
1773
1774                 err = i40iw_hwreg_mr(iwdev, iwmr, access);
1775                 if (err) {
1776                         i40iw_free_stag(iwdev, stag);
1777                         goto error;
1778                 }
1779                 break;
1780         default:
1781                 goto error;
1782         }
1783
1784         iwmr->type = req.reg_type;
1785         if (req.reg_type == IW_MEMREG_TYPE_MEM)
1786                 i40iw_add_pdusecount(iwpd);
1787         return &iwmr->ibmr;
1788
1789 error:
1790         if (palloc->level != I40IW_LEVEL_0)
1791                 i40iw_free_pble(iwdev->pble_rsrc, palloc);
1792         ib_umem_release(region);
1793         kfree(iwmr);
1794         return ERR_PTR(err);
1795 }
1796
1797 /**
1798  * i40iw_reg_phys_mr - register kernel physical memory
1799  * @pd: ibpd pointer
1800  * @addr: physical address of memory to register
1801  * @size: size of memory to register
1802  * @acc: Access rights
1803  * @iova_start: start of virtual address for physical buffers
1804  */
1805 struct ib_mr *i40iw_reg_phys_mr(struct ib_pd *pd,
1806                                 u64 addr,
1807                                 u64 size,
1808                                 int acc,
1809                                 u64 *iova_start)
1810 {
1811         struct i40iw_pd *iwpd = to_iwpd(pd);
1812         struct i40iw_device *iwdev = to_iwdev(pd->device);
1813         struct i40iw_pbl *iwpbl;
1814         struct i40iw_mr *iwmr;
1815         enum i40iw_status_code status;
1816         u32 stag;
1817         u16 access = I40IW_ACCESS_FLAGS_LOCALREAD;
1818         int ret;
1819
1820         iwmr = kzalloc(sizeof(*iwmr), GFP_KERNEL);
1821         if (!iwmr)
1822                 return ERR_PTR(-ENOMEM);
1823         iwmr->ibmr.pd = pd;
1824         iwmr->ibmr.device = pd->device;
1825         iwpbl = &iwmr->iwpbl;
1826         iwpbl->iwmr = iwmr;
1827         iwmr->type = IW_MEMREG_TYPE_MEM;
1828         iwpbl->user_base = *iova_start;
1829         stag = i40iw_create_stag(iwdev);
1830         if (!stag) {
1831                 ret = -EOVERFLOW;
1832                 goto err;
1833         }
1834         access |= i40iw_get_user_access(acc);
1835         iwmr->stag = stag;
1836         iwmr->ibmr.rkey = stag;
1837         iwmr->ibmr.lkey = stag;
1838         iwmr->page_cnt = 1;
1839         iwmr->pgaddrmem[0]  = addr;
1840         status = i40iw_hwreg_mr(iwdev, iwmr, access);
1841         if (status) {
1842                 i40iw_free_stag(iwdev, stag);
1843                 ret = -ENOMEM;
1844                 goto err;
1845         }
1846
1847         i40iw_add_pdusecount(iwpd);
1848         return &iwmr->ibmr;
1849  err:
1850         kfree(iwmr);
1851         return ERR_PTR(ret);
1852 }
1853
1854 /**
1855  * i40iw_get_dma_mr - register physical mem
1856  * @pd: ptr of pd
1857  * @acc: access for memory
1858  */
1859 static struct ib_mr *i40iw_get_dma_mr(struct ib_pd *pd, int acc)
1860 {
1861         u64 kva = 0;
1862
1863         return i40iw_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
1864 }
1865
1866 /**
1867  * i40iw_del_mem_list - Deleting pbl list entries for CQ/QP
1868  * @iwmr: iwmr for IB's user page addresses
1869  * @ucontext: ptr to user context
1870  */
1871 static void i40iw_del_memlist(struct i40iw_mr *iwmr,
1872                               struct i40iw_ucontext *ucontext)
1873 {
1874         struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
1875         unsigned long flags;
1876
1877         switch (iwmr->type) {
1878         case IW_MEMREG_TYPE_CQ:
1879                 spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
1880                 if (!list_empty(&ucontext->cq_reg_mem_list))
1881                         list_del(&iwpbl->list);
1882                 spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
1883                 break;
1884         case IW_MEMREG_TYPE_QP:
1885                 spin_lock_irqsave(&ucontext->qp_reg_mem_list_lock, flags);
1886                 if (!list_empty(&ucontext->qp_reg_mem_list))
1887                         list_del(&iwpbl->list);
1888                 spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags);
1889                 break;
1890         default:
1891                 break;
1892         }
1893 }
1894
1895 /**
1896  * i40iw_dereg_mr - deregister mr
1897  * @ib_mr: mr ptr for dereg
1898  */
1899 static int i40iw_dereg_mr(struct ib_mr *ib_mr)
1900 {
1901         struct ib_pd *ibpd = ib_mr->pd;
1902         struct i40iw_pd *iwpd = to_iwpd(ibpd);
1903         struct i40iw_mr *iwmr = to_iwmr(ib_mr);
1904         struct i40iw_device *iwdev = to_iwdev(ib_mr->device);
1905         enum i40iw_status_code status;
1906         struct i40iw_dealloc_stag_info *info;
1907         struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
1908         struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
1909         struct i40iw_cqp_request *cqp_request;
1910         struct cqp_commands_info *cqp_info;
1911         u32 stag_idx;
1912
1913         if (iwmr->region)
1914                 ib_umem_release(iwmr->region);
1915
1916         if (iwmr->type != IW_MEMREG_TYPE_MEM) {
1917                 if (ibpd->uobject) {
1918                         struct i40iw_ucontext *ucontext;
1919
1920                         ucontext = to_ucontext(ibpd->uobject->context);
1921                         i40iw_del_memlist(iwmr, ucontext);
1922                 }
1923                 if (iwpbl->pbl_allocated)
1924                         i40iw_free_pble(iwdev->pble_rsrc, palloc);
1925                 kfree(iwpbl->iwmr);
1926                 iwpbl->iwmr = NULL;
1927                 return 0;
1928         }
1929
1930         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1931         if (!cqp_request)
1932                 return -ENOMEM;
1933
1934         cqp_info = &cqp_request->info;
1935         info = &cqp_info->in.u.dealloc_stag.info;
1936         memset(info, 0, sizeof(*info));
1937
1938         info->pd_id = cpu_to_le32(iwpd->sc_pd.pd_id & 0x00007fff);
1939         info->stag_idx = RS_64_1(ib_mr->rkey, I40IW_CQPSQ_STAG_IDX_SHIFT);
1940         stag_idx = info->stag_idx;
1941         info->mr = true;
1942         if (iwpbl->pbl_allocated)
1943                 info->dealloc_pbl = true;
1944
1945         cqp_info->cqp_cmd = OP_DEALLOC_STAG;
1946         cqp_info->post_sq = 1;
1947         cqp_info->in.u.dealloc_stag.dev = &iwdev->sc_dev;
1948         cqp_info->in.u.dealloc_stag.scratch = (uintptr_t)cqp_request;
1949         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1950         if (status)
1951                 i40iw_pr_err("CQP-OP dealloc failed for stag_idx = 0x%x\n", stag_idx);
1952         i40iw_rem_pdusecount(iwpd, iwdev);
1953         i40iw_free_stag(iwdev, iwmr->stag);
1954         if (iwpbl->pbl_allocated)
1955                 i40iw_free_pble(iwdev->pble_rsrc, palloc);
1956         kfree(iwmr);
1957         return 0;
1958 }
1959
1960 /**
1961  * i40iw_show_rev
1962  */
1963 static ssize_t i40iw_show_rev(struct device *dev,
1964                               struct device_attribute *attr, char *buf)
1965 {
1966         struct i40iw_ib_device *iwibdev = container_of(dev,
1967                                                        struct i40iw_ib_device,
1968                                                        ibdev.dev);
1969         u32 hw_rev = iwibdev->iwdev->sc_dev.hw_rev;
1970
1971         return sprintf(buf, "%x\n", hw_rev);
1972 }
1973
1974 /**
1975  * i40iw_show_fw_ver
1976  */
1977 static ssize_t i40iw_show_fw_ver(struct device *dev,
1978                                  struct device_attribute *attr, char *buf)
1979 {
1980         u32 firmware_version = I40IW_FW_VERSION;
1981
1982         return sprintf(buf, "%u.%u\n", firmware_version,
1983                        (firmware_version & 0x000000ff));
1984 }
1985
1986 /**
1987  * i40iw_show_hca
1988  */
1989 static ssize_t i40iw_show_hca(struct device *dev,
1990                               struct device_attribute *attr, char *buf)
1991 {
1992         return sprintf(buf, "I40IW\n");
1993 }
1994
1995 /**
1996  * i40iw_show_board
1997  */
1998 static ssize_t i40iw_show_board(struct device *dev,
1999                                 struct device_attribute *attr,
2000                                 char *buf)
2001 {
2002         return sprintf(buf, "%.*s\n", 32, "I40IW Board ID");
2003 }
2004
2005 static DEVICE_ATTR(hw_rev, S_IRUGO, i40iw_show_rev, NULL);
2006 static DEVICE_ATTR(fw_ver, S_IRUGO, i40iw_show_fw_ver, NULL);
2007 static DEVICE_ATTR(hca_type, S_IRUGO, i40iw_show_hca, NULL);
2008 static DEVICE_ATTR(board_id, S_IRUGO, i40iw_show_board, NULL);
2009
2010 static struct device_attribute *i40iw_dev_attributes[] = {
2011         &dev_attr_hw_rev,
2012         &dev_attr_fw_ver,
2013         &dev_attr_hca_type,
2014         &dev_attr_board_id
2015 };
2016
2017 /**
2018  * i40iw_copy_sg_list - copy sg list for qp
2019  * @sg_list: copied into sg_list
2020  * @sgl: copy from sgl
2021  * @num_sges: count of sg entries
2022  */
2023 static void i40iw_copy_sg_list(struct i40iw_sge *sg_list, struct ib_sge *sgl, int num_sges)
2024 {
2025         unsigned int i;
2026
2027         for (i = 0; (i < num_sges) && (i < I40IW_MAX_WQ_FRAGMENT_COUNT); i++) {
2028                 sg_list[i].tag_off = sgl[i].addr;
2029                 sg_list[i].len = sgl[i].length;
2030                 sg_list[i].stag = sgl[i].lkey;
2031         }
2032 }
2033
2034 /**
2035  * i40iw_post_send -  kernel application wr
2036  * @ibqp: qp ptr for wr
2037  * @ib_wr: work request ptr
2038  * @bad_wr: return of bad wr if err
2039  */
2040 static int i40iw_post_send(struct ib_qp *ibqp,
2041                            struct ib_send_wr *ib_wr,
2042                            struct ib_send_wr **bad_wr)
2043 {
2044         struct i40iw_qp *iwqp;
2045         struct i40iw_qp_uk *ukqp;
2046         struct i40iw_post_sq_info info;
2047         enum i40iw_status_code ret;
2048         int err = 0;
2049         unsigned long flags;
2050         bool inv_stag;
2051
2052         iwqp = (struct i40iw_qp *)ibqp;
2053         ukqp = &iwqp->sc_qp.qp_uk;
2054
2055         spin_lock_irqsave(&iwqp->lock, flags);
2056         while (ib_wr) {
2057                 inv_stag = false;
2058                 memset(&info, 0, sizeof(info));
2059                 info.wr_id = (u64)(ib_wr->wr_id);
2060                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || iwqp->sig_all)
2061                         info.signaled = true;
2062                 if (ib_wr->send_flags & IB_SEND_FENCE)
2063                         info.read_fence = true;
2064
2065                 switch (ib_wr->opcode) {
2066                 case IB_WR_SEND:
2067                         /* fall-through */
2068                 case IB_WR_SEND_WITH_INV:
2069                         if (ib_wr->opcode == IB_WR_SEND) {
2070                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
2071                                         info.op_type = I40IW_OP_TYPE_SEND_SOL;
2072                                 else
2073                                         info.op_type = I40IW_OP_TYPE_SEND;
2074                         } else {
2075                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
2076                                         info.op_type = I40IW_OP_TYPE_SEND_SOL_INV;
2077                                 else
2078                                         info.op_type = I40IW_OP_TYPE_SEND_INV;
2079                         }
2080
2081                         if (ib_wr->send_flags & IB_SEND_INLINE) {
2082                                 info.op.inline_send.data = (void *)(unsigned long)ib_wr->sg_list[0].addr;
2083                                 info.op.inline_send.len = ib_wr->sg_list[0].length;
2084                                 ret = ukqp->ops.iw_inline_send(ukqp, &info, ib_wr->ex.invalidate_rkey, false);
2085                         } else {
2086                                 info.op.send.num_sges = ib_wr->num_sge;
2087                                 info.op.send.sg_list = (struct i40iw_sge *)ib_wr->sg_list;
2088                                 ret = ukqp->ops.iw_send(ukqp, &info, ib_wr->ex.invalidate_rkey, false);
2089                         }
2090
2091                         if (ret)
2092                                 err = -EIO;
2093                         break;
2094                 case IB_WR_RDMA_WRITE:
2095                         info.op_type = I40IW_OP_TYPE_RDMA_WRITE;
2096
2097                         if (ib_wr->send_flags & IB_SEND_INLINE) {
2098                                 info.op.inline_rdma_write.data = (void *)(unsigned long)ib_wr->sg_list[0].addr;
2099                                 info.op.inline_rdma_write.len = ib_wr->sg_list[0].length;
2100                                 info.op.inline_rdma_write.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
2101                                 info.op.inline_rdma_write.rem_addr.stag = rdma_wr(ib_wr)->rkey;
2102                                 info.op.inline_rdma_write.rem_addr.len = ib_wr->sg_list->length;
2103                                 ret = ukqp->ops.iw_inline_rdma_write(ukqp, &info, false);
2104                         } else {
2105                                 info.op.rdma_write.lo_sg_list = (void *)ib_wr->sg_list;
2106                                 info.op.rdma_write.num_lo_sges = ib_wr->num_sge;
2107                                 info.op.rdma_write.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
2108                                 info.op.rdma_write.rem_addr.stag = rdma_wr(ib_wr)->rkey;
2109                                 info.op.rdma_write.rem_addr.len = ib_wr->sg_list->length;
2110                                 ret = ukqp->ops.iw_rdma_write(ukqp, &info, false);
2111                         }
2112
2113                         if (ret)
2114                                 err = -EIO;
2115                         break;
2116                 case IB_WR_RDMA_READ_WITH_INV:
2117                         inv_stag = true;
2118                         /* fall-through*/
2119                 case IB_WR_RDMA_READ:
2120                         if (ib_wr->num_sge > I40IW_MAX_SGE_RD) {
2121                                 err = -EINVAL;
2122                                 break;
2123                         }
2124                         info.op_type = I40IW_OP_TYPE_RDMA_READ;
2125                         info.op.rdma_read.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;
2126                         info.op.rdma_read.rem_addr.stag = rdma_wr(ib_wr)->rkey;
2127                         info.op.rdma_read.rem_addr.len = ib_wr->sg_list->length;
2128                         info.op.rdma_read.lo_addr.tag_off = ib_wr->sg_list->addr;
2129                         info.op.rdma_read.lo_addr.stag = ib_wr->sg_list->lkey;
2130                         info.op.rdma_read.lo_addr.len = ib_wr->sg_list->length;
2131                         ret = ukqp->ops.iw_rdma_read(ukqp, &info, inv_stag, false);
2132                         if (ret)
2133                                 err = -EIO;
2134                         break;
2135                 case IB_WR_LOCAL_INV:
2136                         info.op_type = I40IW_OP_TYPE_INV_STAG;
2137                         info.op.inv_local_stag.target_stag = ib_wr->ex.invalidate_rkey;
2138                         ret = ukqp->ops.iw_stag_local_invalidate(ukqp, &info, true);
2139                         if (ret)
2140                                 err = -EIO;
2141                         break;
2142                 case IB_WR_REG_MR:
2143                 {
2144                         struct i40iw_mr *iwmr = to_iwmr(reg_wr(ib_wr)->mr);
2145                         int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
2146                         int flags = reg_wr(ib_wr)->access;
2147                         struct i40iw_pble_alloc *palloc = &iwmr->iwpbl.pble_alloc;
2148                         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
2149                         struct i40iw_fast_reg_stag_info info;
2150
2151                         info.access_rights = I40IW_ACCESS_FLAGS_LOCALREAD;
2152                         info.access_rights |= i40iw_get_user_access(flags);
2153                         info.stag_key = reg_wr(ib_wr)->key & 0xff;
2154                         info.stag_idx = reg_wr(ib_wr)->key >> 8;
2155                         info.wr_id = ib_wr->wr_id;
2156
2157                         info.addr_type = I40IW_ADDR_TYPE_VA_BASED;
2158                         info.va = (void *)(uintptr_t)iwmr->ibmr.iova;
2159                         info.total_len = iwmr->ibmr.length;
2160                         info.first_pm_pbl_index = palloc->level1.idx;
2161                         info.local_fence = ib_wr->send_flags & IB_SEND_FENCE;
2162                         info.signaled = ib_wr->send_flags & IB_SEND_SIGNALED;
2163
2164                         if (page_shift == 21)
2165                                 info.page_size = 1; /* 2M page */
2166
2167                         ret = dev->iw_priv_qp_ops->iw_mr_fast_register(&iwqp->sc_qp, &info, true);
2168                         if (ret)
2169                                 err = -EIO;
2170                         break;
2171                 }
2172                 default:
2173                         err = -EINVAL;
2174                         i40iw_pr_err(" upost_send bad opcode = 0x%x\n",
2175                                      ib_wr->opcode);
2176                         break;
2177                 }
2178
2179                 if (err)
2180                         break;
2181                 ib_wr = ib_wr->next;
2182         }
2183
2184         if (err)
2185                 *bad_wr = ib_wr;
2186         else
2187                 ukqp->ops.iw_qp_post_wr(ukqp);
2188         spin_unlock_irqrestore(&iwqp->lock, flags);
2189
2190         return err;
2191 }
2192
2193 /**
2194  * i40iw_post_recv - post receive wr for kernel application
2195  * @ibqp: ib qp pointer
2196  * @ib_wr: work request for receive
2197  * @bad_wr: bad wr caused an error
2198  */
2199 static int i40iw_post_recv(struct ib_qp *ibqp,
2200                            struct ib_recv_wr *ib_wr,
2201                            struct ib_recv_wr **bad_wr)
2202 {
2203         struct i40iw_qp *iwqp;
2204         struct i40iw_qp_uk *ukqp;
2205         struct i40iw_post_rq_info post_recv;
2206         struct i40iw_sge sg_list[I40IW_MAX_WQ_FRAGMENT_COUNT];
2207         enum i40iw_status_code ret = 0;
2208         unsigned long flags;
2209
2210         iwqp = (struct i40iw_qp *)ibqp;
2211         ukqp = &iwqp->sc_qp.qp_uk;
2212
2213         memset(&post_recv, 0, sizeof(post_recv));
2214         spin_lock_irqsave(&iwqp->lock, flags);
2215         while (ib_wr) {
2216                 post_recv.num_sges = ib_wr->num_sge;
2217                 post_recv.wr_id = ib_wr->wr_id;
2218                 i40iw_copy_sg_list(sg_list, ib_wr->sg_list, ib_wr->num_sge);
2219                 post_recv.sg_list = sg_list;
2220                 ret = ukqp->ops.iw_post_receive(ukqp, &post_recv);
2221                 if (ret) {
2222                         i40iw_pr_err(" post_recv err %d\n", ret);
2223                         *bad_wr = ib_wr;
2224                         goto out;
2225                 }
2226                 ib_wr = ib_wr->next;
2227         }
2228  out:
2229         spin_unlock_irqrestore(&iwqp->lock, flags);
2230         if (ret)
2231                 return -ENOSYS;
2232         return 0;
2233 }
2234
2235 /**
2236  * i40iw_poll_cq - poll cq for completion (kernel apps)
2237  * @ibcq: cq to poll
2238  * @num_entries: number of entries to poll
2239  * @entry: wr of entry completed
2240  */
2241 static int i40iw_poll_cq(struct ib_cq *ibcq,
2242                          int num_entries,
2243                          struct ib_wc *entry)
2244 {
2245         struct i40iw_cq *iwcq;
2246         int cqe_count = 0;
2247         struct i40iw_cq_poll_info cq_poll_info;
2248         enum i40iw_status_code ret;
2249         struct i40iw_cq_uk *ukcq;
2250         struct i40iw_sc_qp *qp;
2251         struct i40iw_qp *iwqp;
2252         unsigned long flags;
2253
2254         iwcq = (struct i40iw_cq *)ibcq;
2255         ukcq = &iwcq->sc_cq.cq_uk;
2256
2257         spin_lock_irqsave(&iwcq->lock, flags);
2258         while (cqe_count < num_entries) {
2259                 ret = ukcq->ops.iw_cq_poll_completion(ukcq, &cq_poll_info, true);
2260                 if (ret == I40IW_ERR_QUEUE_EMPTY) {
2261                         break;
2262                 } else if (ret == I40IW_ERR_QUEUE_DESTROYED) {
2263                         continue;
2264                 } else if (ret) {
2265                         if (!cqe_count)
2266                                 cqe_count = -1;
2267                         break;
2268                 }
2269                 entry->wc_flags = 0;
2270                 entry->wr_id = cq_poll_info.wr_id;
2271                 if (cq_poll_info.error) {
2272                         entry->status = IB_WC_WR_FLUSH_ERR;
2273                         entry->vendor_err = cq_poll_info.major_err << 16 | cq_poll_info.minor_err;
2274                 } else {
2275                         entry->status = IB_WC_SUCCESS;
2276                 }
2277
2278                 switch (cq_poll_info.op_type) {
2279                 case I40IW_OP_TYPE_RDMA_WRITE:
2280                         entry->opcode = IB_WC_RDMA_WRITE;
2281                         break;
2282                 case I40IW_OP_TYPE_RDMA_READ_INV_STAG:
2283                 case I40IW_OP_TYPE_RDMA_READ:
2284                         entry->opcode = IB_WC_RDMA_READ;
2285                         break;
2286                 case I40IW_OP_TYPE_SEND_SOL:
2287                 case I40IW_OP_TYPE_SEND_SOL_INV:
2288                 case I40IW_OP_TYPE_SEND_INV:
2289                 case I40IW_OP_TYPE_SEND:
2290                         entry->opcode = IB_WC_SEND;
2291                         break;
2292                 case I40IW_OP_TYPE_REC:
2293                         entry->opcode = IB_WC_RECV;
2294                         break;
2295                 default:
2296                         entry->opcode = IB_WC_RECV;
2297                         break;
2298                 }
2299
2300                 entry->ex.imm_data = 0;
2301                 qp = (struct i40iw_sc_qp *)cq_poll_info.qp_handle;
2302                 entry->qp = (struct ib_qp *)qp->back_qp;
2303                 entry->src_qp = cq_poll_info.qp_id;
2304                 iwqp = (struct i40iw_qp *)qp->back_qp;
2305                 if (iwqp->iwarp_state > I40IW_QP_STATE_RTS) {
2306                         if (!I40IW_RING_MORE_WORK(qp->qp_uk.sq_ring))
2307                                 complete(&iwqp->sq_drained);
2308                         if (!I40IW_RING_MORE_WORK(qp->qp_uk.rq_ring))
2309                                 complete(&iwqp->rq_drained);
2310                 }
2311                 entry->byte_len = cq_poll_info.bytes_xfered;
2312                 entry++;
2313                 cqe_count++;
2314         }
2315         spin_unlock_irqrestore(&iwcq->lock, flags);
2316         return cqe_count;
2317 }
2318
2319 /**
2320  * i40iw_req_notify_cq - arm cq kernel application
2321  * @ibcq: cq to arm
2322  * @notify_flags: notofication flags
2323  */
2324 static int i40iw_req_notify_cq(struct ib_cq *ibcq,
2325                                enum ib_cq_notify_flags notify_flags)
2326 {
2327         struct i40iw_cq *iwcq;
2328         struct i40iw_cq_uk *ukcq;
2329         enum i40iw_completion_notify cq_notify = IW_CQ_COMPL_SOLICITED;
2330
2331         iwcq = (struct i40iw_cq *)ibcq;
2332         ukcq = &iwcq->sc_cq.cq_uk;
2333         if (notify_flags == IB_CQ_NEXT_COMP)
2334                 cq_notify = IW_CQ_COMPL_EVENT;
2335         ukcq->ops.iw_cq_request_notification(ukcq, cq_notify);
2336         return 0;
2337 }
2338
2339 /**
2340  * i40iw_port_immutable - return port's immutable data
2341  * @ibdev: ib dev struct
2342  * @port_num: port number
2343  * @immutable: immutable data for the port return
2344  */
2345 static int i40iw_port_immutable(struct ib_device *ibdev, u8 port_num,
2346                                 struct ib_port_immutable *immutable)
2347 {
2348         struct ib_port_attr attr;
2349         int err;
2350
2351         err = i40iw_query_port(ibdev, port_num, &attr);
2352
2353         if (err)
2354                 return err;
2355
2356         immutable->pkey_tbl_len = attr.pkey_tbl_len;
2357         immutable->gid_tbl_len = attr.gid_tbl_len;
2358         immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
2359
2360         return 0;
2361 }
2362
2363 /**
2364  * i40iw_get_protocol_stats - Populates the rdma_stats structure
2365  * @ibdev: ib dev struct
2366  * @stats: iw protocol stats struct
2367  */
2368 static int i40iw_get_protocol_stats(struct ib_device *ibdev,
2369                                     union rdma_protocol_stats *stats)
2370 {
2371         struct i40iw_device *iwdev = to_iwdev(ibdev);
2372         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
2373         struct i40iw_dev_pestat *devstat = &dev->dev_pestat;
2374         struct i40iw_dev_hw_stats *hw_stats = &devstat->hw_stats;
2375         struct timespec curr_time;
2376         static struct timespec last_rd_time = {0, 0};
2377         unsigned long flags;
2378
2379         curr_time = current_kernel_time();
2380         memset(stats, 0, sizeof(*stats));
2381
2382         if (dev->is_pf) {
2383                 spin_lock_irqsave(&devstat->stats_lock, flags);
2384                 devstat->ops.iw_hw_stat_read_all(devstat,
2385                         &devstat->hw_stats);
2386                 spin_unlock_irqrestore(&devstat->stats_lock, flags);
2387         } else {
2388                 if (((u64)curr_time.tv_sec - (u64)last_rd_time.tv_sec) > 1)
2389                         if (i40iw_vchnl_vf_get_pe_stats(dev, &devstat->hw_stats))
2390                                 return -ENOSYS;
2391         }
2392
2393         stats->iw.ipInReceives = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXPKTS] +
2394                                  hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6RXPKTS];
2395         stats->iw.ipInTruncatedPkts = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP4RXTRUNC] +
2396                                       hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP6RXTRUNC];
2397         stats->iw.ipInDiscards = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP4RXDISCARD] +
2398                                  hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP6RXDISCARD];
2399         stats->iw.ipOutNoRoutes = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP4TXNOROUTE] +
2400                                   hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_IP6TXNOROUTE];
2401         stats->iw.ipReasmReqds = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXFRAGS] +
2402                                  hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6RXFRAGS];
2403         stats->iw.ipFragCreates = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4TXFRAGS] +
2404                                   hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6TXFRAGS];
2405         stats->iw.ipInMcastPkts = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4RXMCPKTS] +
2406                                   hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6RXMCPKTS];
2407         stats->iw.ipOutMcastPkts = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP4TXMCPKTS] +
2408                                    hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_IP6TXMCPKTS];
2409         stats->iw.tcpOutSegs = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_TCPTXSEG];
2410         stats->iw.tcpInSegs = hw_stats->stat_value_64[I40IW_HW_STAT_INDEX_TCPRXSEGS];
2411         stats->iw.tcpRetransSegs = hw_stats->stat_value_32[I40IW_HW_STAT_INDEX_TCPRTXSEG];
2412
2413         last_rd_time = curr_time;
2414         return 0;
2415 }
2416
2417 /**
2418  * i40iw_query_gid - Query port GID
2419  * @ibdev: device pointer from stack
2420  * @port: port number
2421  * @index: Entry index
2422  * @gid: Global ID
2423  */
2424 static int i40iw_query_gid(struct ib_device *ibdev,
2425                            u8 port,
2426                            int index,
2427                            union ib_gid *gid)
2428 {
2429         struct i40iw_device *iwdev = to_iwdev(ibdev);
2430
2431         memset(gid->raw, 0, sizeof(gid->raw));
2432         ether_addr_copy(gid->raw, iwdev->netdev->dev_addr);
2433         return 0;
2434 }
2435
2436 /**
2437  * i40iw_modify_port  Modify port properties
2438  * @ibdev: device pointer from stack
2439  * @port: port number
2440  * @port_modify_mask: mask for port modifications
2441  * @props: port properties
2442  */
2443 static int i40iw_modify_port(struct ib_device *ibdev,
2444                              u8 port,
2445                              int port_modify_mask,
2446                              struct ib_port_modify *props)
2447 {
2448         return 0;
2449 }
2450
2451 /**
2452  * i40iw_query_pkey - Query partition key
2453  * @ibdev: device pointer from stack
2454  * @port: port number
2455  * @index: index of pkey
2456  * @pkey: pointer to store the pkey
2457  */
2458 static int i40iw_query_pkey(struct ib_device *ibdev,
2459                             u8 port,
2460                             u16 index,
2461                             u16 *pkey)
2462 {
2463         *pkey = 0;
2464         return 0;
2465 }
2466
2467 /**
2468  * i40iw_create_ah - create address handle
2469  * @ibpd: ptr of pd
2470  * @ah_attr: address handle attributes
2471  */
2472 static struct ib_ah *i40iw_create_ah(struct ib_pd *ibpd,
2473                                      struct ib_ah_attr *attr)
2474 {
2475         return ERR_PTR(-ENOSYS);
2476 }
2477
2478 /**
2479  * i40iw_destroy_ah - Destroy address handle
2480  * @ah: pointer to address handle
2481  */
2482 static int i40iw_destroy_ah(struct ib_ah *ah)
2483 {
2484         return -ENOSYS;
2485 }
2486
2487 /**
2488  * i40iw_init_rdma_device - initialization of iwarp device
2489  * @iwdev: iwarp device
2490  */
2491 static struct i40iw_ib_device *i40iw_init_rdma_device(struct i40iw_device *iwdev)
2492 {
2493         struct i40iw_ib_device *iwibdev;
2494         struct net_device *netdev = iwdev->netdev;
2495         struct pci_dev *pcidev = (struct pci_dev *)iwdev->hw.dev_context;
2496
2497         iwibdev = (struct i40iw_ib_device *)ib_alloc_device(sizeof(*iwibdev));
2498         if (!iwibdev) {
2499                 i40iw_pr_err("iwdev == NULL\n");
2500                 return NULL;
2501         }
2502         strlcpy(iwibdev->ibdev.name, "i40iw%d", IB_DEVICE_NAME_MAX);
2503         iwibdev->ibdev.owner = THIS_MODULE;
2504         iwdev->iwibdev = iwibdev;
2505         iwibdev->iwdev = iwdev;
2506
2507         iwibdev->ibdev.node_type = RDMA_NODE_RNIC;
2508         ether_addr_copy((u8 *)&iwibdev->ibdev.node_guid, netdev->dev_addr);
2509
2510         iwibdev->ibdev.uverbs_cmd_mask =
2511             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
2512             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
2513             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
2514             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
2515             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
2516             (1ull << IB_USER_VERBS_CMD_REG_MR) |
2517             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
2518             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
2519             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
2520             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
2521             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
2522             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
2523             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
2524             (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
2525             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
2526             (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
2527             (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
2528             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
2529             (1ull << IB_USER_VERBS_CMD_POST_RECV) |
2530             (1ull << IB_USER_VERBS_CMD_POST_SEND);
2531         iwibdev->ibdev.phys_port_cnt = 1;
2532         iwibdev->ibdev.num_comp_vectors = 1;
2533         iwibdev->ibdev.dma_device = &pcidev->dev;
2534         iwibdev->ibdev.dev.parent = &pcidev->dev;
2535         iwibdev->ibdev.query_port = i40iw_query_port;
2536         iwibdev->ibdev.modify_port = i40iw_modify_port;
2537         iwibdev->ibdev.query_pkey = i40iw_query_pkey;
2538         iwibdev->ibdev.query_gid = i40iw_query_gid;
2539         iwibdev->ibdev.alloc_ucontext = i40iw_alloc_ucontext;
2540         iwibdev->ibdev.dealloc_ucontext = i40iw_dealloc_ucontext;
2541         iwibdev->ibdev.mmap = i40iw_mmap;
2542         iwibdev->ibdev.alloc_pd = i40iw_alloc_pd;
2543         iwibdev->ibdev.dealloc_pd = i40iw_dealloc_pd;
2544         iwibdev->ibdev.create_qp = i40iw_create_qp;
2545         iwibdev->ibdev.modify_qp = i40iw_modify_qp;
2546         iwibdev->ibdev.query_qp = i40iw_query_qp;
2547         iwibdev->ibdev.destroy_qp = i40iw_destroy_qp;
2548         iwibdev->ibdev.create_cq = i40iw_create_cq;
2549         iwibdev->ibdev.destroy_cq = i40iw_destroy_cq;
2550         iwibdev->ibdev.get_dma_mr = i40iw_get_dma_mr;
2551         iwibdev->ibdev.reg_user_mr = i40iw_reg_user_mr;
2552         iwibdev->ibdev.dereg_mr = i40iw_dereg_mr;
2553         iwibdev->ibdev.get_protocol_stats = i40iw_get_protocol_stats;
2554         iwibdev->ibdev.query_device = i40iw_query_device;
2555         iwibdev->ibdev.create_ah = i40iw_create_ah;
2556         iwibdev->ibdev.destroy_ah = i40iw_destroy_ah;
2557         iwibdev->ibdev.drain_sq = i40iw_drain_sq;
2558         iwibdev->ibdev.drain_rq = i40iw_drain_rq;
2559         iwibdev->ibdev.alloc_mr = i40iw_alloc_mr;
2560         iwibdev->ibdev.map_mr_sg = i40iw_map_mr_sg;
2561         iwibdev->ibdev.iwcm = kzalloc(sizeof(*iwibdev->ibdev.iwcm), GFP_KERNEL);
2562         if (!iwibdev->ibdev.iwcm) {
2563                 ib_dealloc_device(&iwibdev->ibdev);
2564                 i40iw_pr_err("iwcm == NULL\n");
2565                 return NULL;
2566         }
2567
2568         iwibdev->ibdev.iwcm->add_ref = i40iw_add_ref;
2569         iwibdev->ibdev.iwcm->rem_ref = i40iw_rem_ref;
2570         iwibdev->ibdev.iwcm->get_qp = i40iw_get_qp;
2571         iwibdev->ibdev.iwcm->connect = i40iw_connect;
2572         iwibdev->ibdev.iwcm->accept = i40iw_accept;
2573         iwibdev->ibdev.iwcm->reject = i40iw_reject;
2574         iwibdev->ibdev.iwcm->create_listen = i40iw_create_listen;
2575         iwibdev->ibdev.iwcm->destroy_listen = i40iw_destroy_listen;
2576         memcpy(iwibdev->ibdev.iwcm->ifname, netdev->name,
2577                sizeof(iwibdev->ibdev.iwcm->ifname));
2578         iwibdev->ibdev.get_port_immutable   = i40iw_port_immutable;
2579         iwibdev->ibdev.poll_cq = i40iw_poll_cq;
2580         iwibdev->ibdev.req_notify_cq = i40iw_req_notify_cq;
2581         iwibdev->ibdev.post_send = i40iw_post_send;
2582         iwibdev->ibdev.post_recv = i40iw_post_recv;
2583
2584         return iwibdev;
2585 }
2586
2587 /**
2588  * i40iw_port_ibevent - indicate port event
2589  * @iwdev: iwarp device
2590  */
2591 void i40iw_port_ibevent(struct i40iw_device *iwdev)
2592 {
2593         struct i40iw_ib_device *iwibdev = iwdev->iwibdev;
2594         struct ib_event event;
2595
2596         event.device = &iwibdev->ibdev;
2597         event.element.port_num = 1;
2598         event.event = iwdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
2599         ib_dispatch_event(&event);
2600 }
2601
2602 /**
2603  * i40iw_unregister_rdma_device - unregister of iwarp from IB
2604  * @iwibdev: rdma device ptr
2605  */
2606 static void i40iw_unregister_rdma_device(struct i40iw_ib_device *iwibdev)
2607 {
2608         int i;
2609
2610         for (i = 0; i < ARRAY_SIZE(i40iw_dev_attributes); ++i)
2611                 device_remove_file(&iwibdev->ibdev.dev,
2612                                    i40iw_dev_attributes[i]);
2613         ib_unregister_device(&iwibdev->ibdev);
2614 }
2615
2616 /**
2617  * i40iw_destroy_rdma_device - destroy rdma device and free resources
2618  * @iwibdev: IB device ptr
2619  */
2620 void i40iw_destroy_rdma_device(struct i40iw_ib_device *iwibdev)
2621 {
2622         if (!iwibdev)
2623                 return;
2624
2625         i40iw_unregister_rdma_device(iwibdev);
2626         kfree(iwibdev->ibdev.iwcm);
2627         iwibdev->ibdev.iwcm = NULL;
2628         ib_dealloc_device(&iwibdev->ibdev);
2629 }
2630
2631 /**
2632  * i40iw_register_rdma_device - register iwarp device to IB
2633  * @iwdev: iwarp device
2634  */
2635 int i40iw_register_rdma_device(struct i40iw_device *iwdev)
2636 {
2637         int i, ret;
2638         struct i40iw_ib_device *iwibdev;
2639
2640         iwdev->iwibdev = i40iw_init_rdma_device(iwdev);
2641         if (!iwdev->iwibdev)
2642                 return -ENOSYS;
2643         iwibdev = iwdev->iwibdev;
2644
2645         ret = ib_register_device(&iwibdev->ibdev, NULL);
2646         if (ret)
2647                 goto error;
2648
2649         for (i = 0; i < ARRAY_SIZE(i40iw_dev_attributes); ++i) {
2650                 ret =
2651                     device_create_file(&iwibdev->ibdev.dev,
2652                                        i40iw_dev_attributes[i]);
2653                 if (ret) {
2654                         while (i > 0) {
2655                                 i--;
2656                                 device_remove_file(&iwibdev->ibdev.dev, i40iw_dev_attributes[i]);
2657                         }
2658                         ib_unregister_device(&iwibdev->ibdev);
2659                         goto error;
2660                 }
2661         }
2662         return 0;
2663 error:
2664         kfree(iwdev->iwibdev->ibdev.iwcm);
2665         iwdev->iwibdev->ibdev.iwcm = NULL;
2666         ib_dealloc_device(&iwdev->iwibdev->ibdev);
2667         return -ENOSYS;
2668 }