sys/dev/cxgbe/iw_cxgbe/provider.c

   1 /*
   2  * Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include "opt_inet.h"
  36
  37 #ifdef TCP_OFFLOAD
  38 #include <asm/pgtable.h>
  39 #include <linux/page.h>
  40 #include <rdma/ib_verbs.h>
  41 #include <rdma/ib_user_verbs.h>
  42
  43 #include "iw_cxgbe.h"
  44 #include "user.h"
  45
  46 static int fastreg_support = 1;
  47 module_param(fastreg_support, int, 0644);
  48 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default = 1)");
  49
  50 static int c4iw_modify_port(struct ib_device *ibdev,
  51                             u8 port, int port_modify_mask,
  52                             struct ib_port_modify *props)
  53 {
  54         return -ENOSYS;
  55 }
  56
  57 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
  58                                     struct ib_ah_attr *ah_attr)
  59 {
  60         return ERR_PTR(-ENOSYS);
  61 }
  62
  63 static int c4iw_ah_destroy(struct ib_ah *ah)
  64 {
  65         return -ENOSYS;
  66 }
  67
  68 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  69 {
  70         return -ENOSYS;
  71 }
  72
  73 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  74 {
  75         return -ENOSYS;
  76 }
  77
  78 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
  79                             u8 port_num, struct ib_wc *in_wc,
  80                             struct ib_grh *in_grh, struct ib_mad *in_mad,
  81                             struct ib_mad *out_mad)
  82 {
  83         return -ENOSYS;
  84 }
  85
  86 static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
  87 {
  88         struct c4iw_dev *rhp = to_c4iw_dev(context->device);
  89         struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
  90         struct c4iw_mm_entry *mm, *tmp;
  91
  92         CTR2(KTR_IW_CXGBE, "%s context %p", __func__, context);
  93         list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
  94                 kfree(mm);
  95         c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
  96         kfree(ucontext);
  97         return 0;
  98 }
  99
 100 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
 101                                                struct ib_udata *udata)
 102 {
 103         struct c4iw_ucontext *context;
 104         struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
 105
 106         CTR2(KTR_IW_CXGBE, "%s ibdev %p", __func__, ibdev);
 107         context = kzalloc(sizeof(*context), GFP_KERNEL);
 108         if (!context)
 109                 return ERR_PTR(-ENOMEM);
 110         c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
 111         INIT_LIST_HEAD(&context->mmaps);
 112         spin_lock_init(&context->mmap_lock);
 113         return &context->ibucontext;
 114 }
 115
 116 static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
 117 {
 118     return pgprot_writecombine(prot);
 119 }
 120
 121 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 122 {
 123         int len = vma->vm_end - vma->vm_start;
 124         u32 key = vma->vm_pgoff << PAGE_SHIFT;
 125         struct c4iw_rdev *rdev;
 126         int ret = 0;
 127         struct c4iw_mm_entry *mm;
 128         struct c4iw_ucontext *ucontext;
 129         u64 addr, paddr;
 130
 131         u64 va_regs_res = 0, va_udbs_res = 0;
 132         u64 len_regs_res = 0, len_udbs_res = 0;
 133
 134         CTR3(KTR_IW_CXGBE, "%s:1 ctx %p vma %p", __func__, context, vma);
 135
 136         CTR4(KTR_IW_CXGBE, "%s:1a pgoff 0x%lx key 0x%x len %d", __func__,
 137             vma->vm_pgoff, key, len);
 138
 139         if (vma->vm_start & (PAGE_SIZE-1)) {
 140                 CTR3(KTR_IW_CXGBE, "%s:2 unaligned vm_start %u vma %p",
 141                     __func__, vma->vm_start, vma);
 142                 return -EINVAL;
 143         }
 144
 145         rdev = &(to_c4iw_dev(context->device)->rdev);
 146         ucontext = to_c4iw_ucontext(context);
 147
 148         mm = remove_mmap(ucontext, key, len);
 149         if (!mm) {
 150                 CTR4(KTR_IW_CXGBE, "%s:3 ucontext %p key %u len %u", __func__,
 151                     ucontext, key, len);
 152                 return -EINVAL;
 153         }
 154         addr = mm->addr;
 155         kfree(mm);
 156
 157         va_regs_res = (u64)rman_get_virtual(rdev->adap->regs_res);
 158         len_regs_res = (u64)rman_get_size(rdev->adap->regs_res);
 159         va_udbs_res = (u64)rman_get_virtual(rdev->adap->udbs_res);
 160         len_udbs_res = (u64)rman_get_size(rdev->adap->udbs_res);
 161
 162         CTR6(KTR_IW_CXGBE,
 163             "%s:4 addr %p, masync region %p:%p, udb region %p:%p", __func__,
 164             addr, va_regs_res, va_regs_res+len_regs_res, va_udbs_res,
 165             va_udbs_res+len_udbs_res);
 166
 167         if (addr >= va_regs_res && addr < va_regs_res + len_regs_res) {
 168                 CTR4(KTR_IW_CXGBE, "%s:5 MA_SYNC addr %p region %p, reglen %u",
 169                     __func__, addr, va_regs_res, len_regs_res);
 170                 /*
 171                  * MA_SYNC register...
 172                  */
 173                 paddr = vtophys(addr);
 174                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 175                 ret = io_remap_pfn_range(vma, vma->vm_start,
 176                                 paddr >> PAGE_SHIFT,
 177                                 len, vma->vm_page_prot);
 178         } else {
 179
 180                 if (addr >= va_udbs_res && addr < va_udbs_res + len_udbs_res) {
 181                         /*
 182                         * Map user DB or OCQP memory...
 183                         */
 184                         paddr = vtophys(addr);
 185                         CTR4(KTR_IW_CXGBE,
 186                             "%s:6 USER DB-GTS addr %p region %p, reglen %u",
 187                             __func__, addr, va_udbs_res, len_udbs_res);
 188 #ifdef DOT5
 189                         if (is_t5(rdev->lldi.adapter_type) && map_udb_as_wc)
 190                                 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
 191                         else
 192 #endif
 193                                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 194                         ret = io_remap_pfn_range(vma, vma->vm_start,
 195                                         paddr >> PAGE_SHIFT,
 196                                         len, vma->vm_page_prot);
 197                 } else {
 198                         /*
 199                          * Map WQ or CQ contig dma memory...
 200                          */
 201                         CTR4(KTR_IW_CXGBE,
 202                             "%s:7 WQ/CQ addr %p vm_start %u vma %p", __func__,
 203                             addr, vma->vm_start, vma);
 204                         ret = io_remap_pfn_range(vma, vma->vm_start,
 205                                 addr >> PAGE_SHIFT,
 206                                 len, vma->vm_page_prot);
 207                 }
 208         }
 209         CTR4(KTR_IW_CXGBE, "%s:8 ctx %p vma %p ret %u", __func__, context, vma,
 210             ret);
 211         return ret;
 212 }
 213
 214 static int
 215 c4iw_deallocate_pd(struct ib_pd *pd)
 216 {
 217         struct c4iw_pd *php = to_c4iw_pd(pd);
 218         struct c4iw_dev *rhp = php->rhp;
 219
 220         CTR3(KTR_IW_CXGBE, "%s: pd %p, pdid 0x%x", __func__, pd, php->pdid);
 221
 222         c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
 223         mutex_lock(&rhp->rdev.stats.lock);
 224         rhp->rdev.stats.pd.cur--;
 225         mutex_unlock(&rhp->rdev.stats.lock);
 226         kfree(php);
 227
 228         return (0);
 229 }
 230
 231 static struct ib_pd *
 232 c4iw_allocate_pd(struct ib_device *ibdev, struct ib_ucontext *context,
 233     struct ib_udata *udata)
 234 {
 235         struct c4iw_pd *php;
 236         u32 pdid;
 237         struct c4iw_dev *rhp;
 238
 239         CTR4(KTR_IW_CXGBE, "%s: ibdev %p, context %p, data %p", __func__, ibdev,
 240             context, udata);
 241         rhp = (struct c4iw_dev *) ibdev;
 242         pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
 243         if (!pdid)
 244                 return ERR_PTR(-EINVAL);
 245         php = kzalloc(sizeof(*php), GFP_KERNEL);
 246         if (!php) {
 247                 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
 248                 return ERR_PTR(-ENOMEM);
 249         }
 250         php->pdid = pdid;
 251         php->rhp = rhp;
 252         if (context) {
 253                 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
 254                         c4iw_deallocate_pd(&php->ibpd);
 255                         return ERR_PTR(-EFAULT);
 256                 }
 257         }
 258         mutex_lock(&rhp->rdev.stats.lock);
 259         rhp->rdev.stats.pd.cur++;
 260         if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
 261                 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
 262         mutex_unlock(&rhp->rdev.stats.lock);
 263
 264         CTR6(KTR_IW_CXGBE,
 265             "%s: ibdev %p, context %p, data %p, pddid 0x%x, pd %p", __func__,
 266             ibdev, context, udata, pdid, php);
 267         return (&php->ibpd);
 268 }
 269
 270 static int
 271 c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 272 {
 273
 274         CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, pkey %p", __func__,
 275             ibdev, port, index, pkey);
 276
 277         *pkey = 0;
 278         return (0);
 279 }
 280
 281 static int
 282 c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid)
 283 {
 284         struct c4iw_dev *dev;
 285         struct port_info *pi;
 286         struct adapter *sc;
 287
 288         CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, gid %p", __func__,
 289             ibdev, port, index, gid);
 290
 291         memset(&gid->raw[0], 0, sizeof(gid->raw));
 292         dev = to_c4iw_dev(ibdev);
 293         sc = dev->rdev.adap;
 294         if (port == 0 || port > sc->params.nports)
 295                 return (-EINVAL);
 296         pi = sc->port[port - 1];
 297         memcpy(&gid->raw[0], pi->hw_addr, sizeof(pi->hw_addr));
 298         return (0);
 299 }
 300
 301 static int
 302 c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 303 {
 304         struct c4iw_dev *dev = to_c4iw_dev(ibdev);
 305         struct adapter *sc = dev->rdev.adap;
 306
 307         CTR3(KTR_IW_CXGBE, "%s ibdev %p, props %p", __func__, ibdev, props);
 308
 309         memset(props, 0, sizeof *props);
 310         memcpy(&props->sys_image_guid, sc->port[0]->hw_addr, 6);
 311         props->hw_ver = sc->params.chipid;
 312         props->fw_ver = sc->params.fw_vers;
 313         props->device_cap_flags = dev->device_cap_flags;
 314         props->page_size_cap = T4_PAGESIZE_MASK;
 315         props->vendor_id = pci_get_vendor(sc->dev);
 316         props->vendor_part_id = pci_get_device(sc->dev);
 317         props->max_mr_size = T4_MAX_MR_SIZE;
 318         props->max_qp = T4_MAX_NUM_QP;
 319         props->max_qp_wr = T4_MAX_QP_DEPTH;
 320         props->max_sge = T4_MAX_RECV_SGE;
 321         props->max_sge_rd = 1;
 322         props->max_qp_rd_atom = c4iw_max_read_depth;
 323         props->max_qp_init_rd_atom = c4iw_max_read_depth;
 324         props->max_cq = T4_MAX_NUM_CQ;
 325         props->max_cqe = T4_MAX_CQ_DEPTH;
 326         props->max_mr = c4iw_num_stags(&dev->rdev);
 327         props->max_pd = T4_MAX_NUM_PD;
 328         props->local_ca_ack_delay = 0;
 329         props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
 330
 331         return (0);
 332 }
 333
 334 /*
 335  * Returns -errno on failure.
 336  */
 337 static int
 338 c4iw_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 339 {
 340         struct c4iw_dev *dev;
 341         struct adapter *sc;
 342         struct port_info *pi;
 343         struct ifnet *ifp;
 344
 345         CTR4(KTR_IW_CXGBE, "%s ibdev %p, port %d, props %p", __func__, ibdev,
 346             port, props);
 347
 348         dev = to_c4iw_dev(ibdev);
 349         sc = dev->rdev.adap;
 350         if (port > sc->params.nports)
 351                 return (-EINVAL);
 352         pi = sc->port[port - 1];
 353         ifp = pi->ifp;
 354
 355         memset(props, 0, sizeof(struct ib_port_attr));
 356         props->max_mtu = IB_MTU_4096;
 357         if (ifp->if_mtu >= 4096)
 358                 props->active_mtu = IB_MTU_4096;
 359         else if (ifp->if_mtu >= 2048)
 360                 props->active_mtu = IB_MTU_2048;
 361         else if (ifp->if_mtu >= 1024)
 362                 props->active_mtu = IB_MTU_1024;
 363         else if (ifp->if_mtu >= 512)
 364                 props->active_mtu = IB_MTU_512;
 365         else
 366                 props->active_mtu = IB_MTU_256;
 367         props->state = pi->link_cfg.link_ok ? IB_PORT_ACTIVE : IB_PORT_DOWN;
 368         props->port_cap_flags =
 369             IB_PORT_CM_SUP |
 370             IB_PORT_SNMP_TUNNEL_SUP |
 371             IB_PORT_REINIT_SUP |
 372             IB_PORT_DEVICE_MGMT_SUP |
 373             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 374         props->gid_tbl_len = 1;
 375         props->pkey_tbl_len = 1;
 376         props->active_width = 2;
 377         props->active_speed = 2;
 378         props->max_msg_sz = -1;
 379
 380         return 0;
 381 }
 382
 383 /*
 384  * Returns -errno on error.
 385  */
 386 int
 387 c4iw_register_device(struct c4iw_dev *dev)
 388 {
 389         struct adapter *sc = dev->rdev.adap;
 390         struct ib_device *ibdev = &dev->ibdev;
 391         struct iw_cm_verbs *iwcm;
 392         int ret;
 393
 394         CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, sc);
 395         BUG_ON(!sc->port[0]);
 396         strlcpy(ibdev->name, device_get_nameunit(sc->dev), sizeof(ibdev->name));
 397         memset(&ibdev->node_guid, 0, sizeof(ibdev->node_guid));
 398         memcpy(&ibdev->node_guid, sc->port[0]->hw_addr, 6);
 399         ibdev->owner = THIS_MODULE;
 400         dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
 401         if (fastreg_support)
 402                 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 403         ibdev->local_dma_lkey = 0;
 404         ibdev->uverbs_cmd_mask =
 405             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 406             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 407             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 408             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 409             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 410             (1ull << IB_USER_VERBS_CMD_REG_MR) |
 411             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 412             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 413             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 414             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 415             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
 416             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 417             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 418             (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
 419             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
 420             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 421             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
 422             (1ull << IB_USER_VERBS_CMD_POST_RECV);
 423         ibdev->node_type = RDMA_NODE_RNIC;
 424         strlcpy(ibdev->node_desc, C4IW_NODE_DESC, sizeof(ibdev->node_desc));
 425         ibdev->phys_port_cnt = sc->params.nports;
 426         ibdev->num_comp_vectors = 1;
 427         ibdev->dma_device = sc->dev;
 428         ibdev->query_device = c4iw_query_device;
 429         ibdev->query_port = c4iw_query_port;
 430         ibdev->modify_port = c4iw_modify_port;
 431         ibdev->query_pkey = c4iw_query_pkey;
 432         ibdev->query_gid = c4iw_query_gid;
 433         ibdev->alloc_ucontext = c4iw_alloc_ucontext;
 434         ibdev->dealloc_ucontext = c4iw_dealloc_ucontext;
 435         ibdev->mmap = c4iw_mmap;
 436         ibdev->alloc_pd = c4iw_allocate_pd;
 437         ibdev->dealloc_pd = c4iw_deallocate_pd;
 438         ibdev->create_ah = c4iw_ah_create;
 439         ibdev->destroy_ah = c4iw_ah_destroy;
 440         ibdev->create_qp = c4iw_create_qp;
 441         ibdev->modify_qp = c4iw_ib_modify_qp;
 442         ibdev->query_qp = c4iw_ib_query_qp;
 443         ibdev->destroy_qp = c4iw_destroy_qp;
 444         ibdev->create_cq = c4iw_create_cq;
 445         ibdev->destroy_cq = c4iw_destroy_cq;
 446         ibdev->resize_cq = c4iw_resize_cq;
 447         ibdev->poll_cq = c4iw_poll_cq;
 448         ibdev->get_dma_mr = c4iw_get_dma_mr;
 449         ibdev->reg_phys_mr = c4iw_register_phys_mem;
 450         ibdev->rereg_phys_mr = c4iw_reregister_phys_mem;
 451         ibdev->reg_user_mr = c4iw_reg_user_mr;
 452         ibdev->dereg_mr = c4iw_dereg_mr;
 453         ibdev->alloc_mw = c4iw_alloc_mw;
 454         ibdev->bind_mw = c4iw_bind_mw;
 455         ibdev->dealloc_mw = c4iw_dealloc_mw;
 456         ibdev->alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
 457         ibdev->alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
 458         ibdev->free_fast_reg_page_list = c4iw_free_fastreg_pbl;
 459         ibdev->attach_mcast = c4iw_multicast_attach;
 460         ibdev->detach_mcast = c4iw_multicast_detach;
 461         ibdev->process_mad = c4iw_process_mad;
 462         ibdev->req_notify_cq = c4iw_arm_cq;
 463         ibdev->post_send = c4iw_post_send;
 464         ibdev->post_recv = c4iw_post_receive;
 465         ibdev->uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
 466
 467         iwcm = kmalloc(sizeof(*iwcm), GFP_KERNEL);
 468         if (iwcm == NULL)
 469                 return (-ENOMEM);
 470
 471         iwcm->connect = c4iw_connect;
 472         iwcm->accept = c4iw_accept_cr;
 473         iwcm->reject = c4iw_reject_cr;
 474         iwcm->create_listen = c4iw_create_listen;
 475         iwcm->destroy_listen = c4iw_destroy_listen;
 476         iwcm->add_ref = c4iw_qp_add_ref;
 477         iwcm->rem_ref = c4iw_qp_rem_ref;
 478         iwcm->get_qp = c4iw_get_qp;
 479         ibdev->iwcm = iwcm;
 480
 481         ret = ib_register_device(&dev->ibdev, NULL);
 482         if (ret)
 483                 kfree(iwcm);
 484
 485         return (ret);
 486 }
 487
 488 void
 489 c4iw_unregister_device(struct c4iw_dev *dev)
 490 {
 491
 492         CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev,
 493             dev->rdev.adap);
 494         ib_unregister_device(&dev->ibdev);
 495         kfree(dev->ibdev.iwcm);
 496         return;
 497 }
 498 #endif