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 #ifdef DOT5
 117 static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
 118 {
 119     return pgprot_writecombine(prot);
 120 }
 121 #endif
 122
 123 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 124 {
 125         int len = vma->vm_end - vma->vm_start;
 126         u32 key = vma->vm_pgoff << PAGE_SHIFT;
 127         struct c4iw_rdev *rdev;
 128         int ret = 0;
 129         struct c4iw_mm_entry *mm;
 130         struct c4iw_ucontext *ucontext;
 131         u64 addr, paddr;
 132
 133         u64 va_regs_res = 0, va_udbs_res = 0;
 134         u64 len_regs_res = 0, len_udbs_res = 0;
 135
 136         CTR3(KTR_IW_CXGBE, "%s:1 ctx %p vma %p", __func__, context, vma);
 137
 138         CTR4(KTR_IW_CXGBE, "%s:1a pgoff 0x%lx key 0x%x len %d", __func__,
 139             vma->vm_pgoff, key, len);
 140
 141         if (vma->vm_start & (PAGE_SIZE-1)) {
 142                 CTR3(KTR_IW_CXGBE, "%s:2 unaligned vm_start %u vma %p",
 143                     __func__, vma->vm_start, vma);
 144                 return -EINVAL;
 145         }
 146
 147         rdev = &(to_c4iw_dev(context->device)->rdev);
 148         ucontext = to_c4iw_ucontext(context);
 149
 150         mm = remove_mmap(ucontext, key, len);
 151         if (!mm) {
 152                 CTR4(KTR_IW_CXGBE, "%s:3 ucontext %p key %u len %u", __func__,
 153                     ucontext, key, len);
 154                 return -EINVAL;
 155         }
 156         addr = mm->addr;
 157         kfree(mm);
 158
 159         va_regs_res = (u64)rman_get_virtual(rdev->adap->regs_res);
 160         len_regs_res = (u64)rman_get_size(rdev->adap->regs_res);
 161         va_udbs_res = (u64)rman_get_virtual(rdev->adap->udbs_res);
 162         len_udbs_res = (u64)rman_get_size(rdev->adap->udbs_res);
 163
 164         CTR6(KTR_IW_CXGBE,
 165             "%s:4 addr %p, masync region %p:%p, udb region %p:%p", __func__,
 166             addr, va_regs_res, va_regs_res+len_regs_res, va_udbs_res,
 167             va_udbs_res+len_udbs_res);
 168
 169         if (addr >= va_regs_res && addr < va_regs_res + len_regs_res) {
 170                 CTR4(KTR_IW_CXGBE, "%s:5 MA_SYNC addr %p region %p, reglen %u",
 171                     __func__, addr, va_regs_res, len_regs_res);
 172                 /*
 173                  * MA_SYNC register...
 174                  */
 175                 paddr = vtophys(addr);
 176                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 177                 ret = io_remap_pfn_range(vma, vma->vm_start,
 178                                 paddr >> PAGE_SHIFT,
 179                                 len, vma->vm_page_prot);
 180         } else {
 181
 182                 if (addr >= va_udbs_res && addr < va_udbs_res + len_udbs_res) {
 183                         /*
 184                         * Map user DB or OCQP memory...
 185                         */
 186                         paddr = vtophys(addr);
 187                         CTR4(KTR_IW_CXGBE,
 188                             "%s:6 USER DB-GTS addr %p region %p, reglen %u",
 189                             __func__, addr, va_udbs_res, len_udbs_res);
 190 #ifdef DOT5
 191                         if (is_t5(rdev->lldi.adapter_type) && map_udb_as_wc)
 192                                 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
 193                         else
 194 #endif
 195                                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 196                         ret = io_remap_pfn_range(vma, vma->vm_start,
 197                                         paddr >> PAGE_SHIFT,
 198                                         len, vma->vm_page_prot);
 199                 } else {
 200                         /*
 201                          * Map WQ or CQ contig dma memory...
 202                          */
 203                         CTR4(KTR_IW_CXGBE,
 204                             "%s:7 WQ/CQ addr %p vm_start %u vma %p", __func__,
 205                             addr, vma->vm_start, vma);
 206                         ret = io_remap_pfn_range(vma, vma->vm_start,
 207                                 addr >> PAGE_SHIFT,
 208                                 len, vma->vm_page_prot);
 209                 }
 210         }
 211         CTR4(KTR_IW_CXGBE, "%s:8 ctx %p vma %p ret %u", __func__, context, vma,
 212             ret);
 213         return ret;
 214 }
 215
 216 static int
 217 c4iw_deallocate_pd(struct ib_pd *pd)
 218 {
 219         struct c4iw_pd *php = to_c4iw_pd(pd);
 220         struct c4iw_dev *rhp = php->rhp;
 221
 222         CTR3(KTR_IW_CXGBE, "%s: pd %p, pdid 0x%x", __func__, pd, php->pdid);
 223
 224         c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
 225         mutex_lock(&rhp->rdev.stats.lock);
 226         rhp->rdev.stats.pd.cur--;
 227         mutex_unlock(&rhp->rdev.stats.lock);
 228         kfree(php);
 229
 230         return (0);
 231 }
 232
 233 static struct ib_pd *
 234 c4iw_allocate_pd(struct ib_device *ibdev, struct ib_ucontext *context,
 235     struct ib_udata *udata)
 236 {
 237         struct c4iw_pd *php;
 238         u32 pdid;
 239         struct c4iw_dev *rhp;
 240
 241         CTR4(KTR_IW_CXGBE, "%s: ibdev %p, context %p, data %p", __func__, ibdev,
 242             context, udata);
 243         rhp = (struct c4iw_dev *) ibdev;
 244         pdid =  c4iw_get_resource(&rhp->rdev.resource.pdid_table);
 245         if (!pdid)
 246                 return ERR_PTR(-EINVAL);
 247         php = kzalloc(sizeof(*php), GFP_KERNEL);
 248         if (!php) {
 249                 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
 250                 return ERR_PTR(-ENOMEM);
 251         }
 252         php->pdid = pdid;
 253         php->rhp = rhp;
 254         if (context) {
 255                 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
 256                         c4iw_deallocate_pd(&php->ibpd);
 257                         return ERR_PTR(-EFAULT);
 258                 }
 259         }
 260         mutex_lock(&rhp->rdev.stats.lock);
 261         rhp->rdev.stats.pd.cur++;
 262         if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
 263                 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
 264         mutex_unlock(&rhp->rdev.stats.lock);
 265
 266         CTR6(KTR_IW_CXGBE,
 267             "%s: ibdev %p, context %p, data %p, pddid 0x%x, pd %p", __func__,
 268             ibdev, context, udata, pdid, php);
 269         return (&php->ibpd);
 270 }
 271
 272 static int
 273 c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 274 {
 275
 276         CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, pkey %p", __func__,
 277             ibdev, port, index, pkey);
 278
 279         *pkey = 0;
 280         return (0);
 281 }
 282
 283 static int
 284 c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid)
 285 {
 286         struct c4iw_dev *dev;
 287         struct port_info *pi;
 288         struct adapter *sc;
 289
 290         CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, gid %p", __func__,
 291             ibdev, port, index, gid);
 292
 293         memset(&gid->raw[0], 0, sizeof(gid->raw));
 294         dev = to_c4iw_dev(ibdev);
 295         sc = dev->rdev.adap;
 296         if (port == 0 || port > sc->params.nports)
 297                 return (-EINVAL);
 298         pi = sc->port[port - 1];
 299         memcpy(&gid->raw[0], pi->hw_addr, sizeof(pi->hw_addr));
 300         return (0);
 301 }
 302
 303 static int
 304 c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 305 {
 306         struct c4iw_dev *dev = to_c4iw_dev(ibdev);
 307         struct adapter *sc = dev->rdev.adap;
 308
 309         CTR3(KTR_IW_CXGBE, "%s ibdev %p, props %p", __func__, ibdev, props);
 310
 311         memset(props, 0, sizeof *props);
 312         memcpy(&props->sys_image_guid, sc->port[0]->hw_addr, 6);
 313         props->hw_ver = sc->params.chipid;
 314         props->fw_ver = sc->params.fw_vers;
 315         props->device_cap_flags = dev->device_cap_flags;
 316         props->page_size_cap = T4_PAGESIZE_MASK;
 317         props->vendor_id = pci_get_vendor(sc->dev);
 318         props->vendor_part_id = pci_get_device(sc->dev);
 319         props->max_mr_size = T4_MAX_MR_SIZE;
 320         props->max_qp = T4_MAX_NUM_QP;
 321         props->max_qp_wr = T4_MAX_QP_DEPTH;
 322         props->max_sge = T4_MAX_RECV_SGE;
 323         props->max_sge_rd = 1;
 324         props->max_qp_rd_atom = c4iw_max_read_depth;
 325         props->max_qp_init_rd_atom = c4iw_max_read_depth;
 326         props->max_cq = T4_MAX_NUM_CQ;
 327         props->max_cqe = T4_MAX_CQ_DEPTH;
 328         props->max_mr = c4iw_num_stags(&dev->rdev);
 329         props->max_pd = T4_MAX_NUM_PD;
 330         props->local_ca_ack_delay = 0;
 331         props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
 332
 333         return (0);
 334 }
 335
 336 /*
 337  * Returns -errno on failure.
 338  */
 339 static int
 340 c4iw_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 341 {
 342         struct c4iw_dev *dev;
 343         struct adapter *sc;
 344         struct port_info *pi;
 345         struct ifnet *ifp;
 346
 347         CTR4(KTR_IW_CXGBE, "%s ibdev %p, port %d, props %p", __func__, ibdev,
 348             port, props);
 349
 350         dev = to_c4iw_dev(ibdev);
 351         sc = dev->rdev.adap;
 352         if (port > sc->params.nports)
 353                 return (-EINVAL);
 354         pi = sc->port[port - 1];
 355         ifp = pi->ifp;
 356
 357         memset(props, 0, sizeof(struct ib_port_attr));
 358         props->max_mtu = IB_MTU_4096;
 359         if (ifp->if_mtu >= 4096)
 360                 props->active_mtu = IB_MTU_4096;
 361         else if (ifp->if_mtu >= 2048)
 362                 props->active_mtu = IB_MTU_2048;
 363         else if (ifp->if_mtu >= 1024)
 364                 props->active_mtu = IB_MTU_1024;
 365         else if (ifp->if_mtu >= 512)
 366                 props->active_mtu = IB_MTU_512;
 367         else
 368                 props->active_mtu = IB_MTU_256;
 369         props->state = pi->link_cfg.link_ok ? IB_PORT_ACTIVE : IB_PORT_DOWN;
 370         props->port_cap_flags =
 371             IB_PORT_CM_SUP |
 372             IB_PORT_SNMP_TUNNEL_SUP |
 373             IB_PORT_REINIT_SUP |
 374             IB_PORT_DEVICE_MGMT_SUP |
 375             IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 376         props->gid_tbl_len = 1;
 377         props->pkey_tbl_len = 1;
 378         props->active_width = 2;
 379         props->active_speed = 2;
 380         props->max_msg_sz = -1;
 381
 382         return 0;
 383 }
 384
 385 /*
 386  * Returns -errno on error.
 387  */
 388 int
 389 c4iw_register_device(struct c4iw_dev *dev)
 390 {
 391         struct adapter *sc = dev->rdev.adap;
 392         struct ib_device *ibdev = &dev->ibdev;
 393         struct iw_cm_verbs *iwcm;
 394         int ret;
 395
 396         CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, sc);
 397         BUG_ON(!sc->port[0]);
 398         strlcpy(ibdev->name, device_get_nameunit(sc->dev), sizeof(ibdev->name));
 399         memset(&ibdev->node_guid, 0, sizeof(ibdev->node_guid));
 400         memcpy(&ibdev->node_guid, sc->port[0]->hw_addr, 6);
 401         ibdev->owner = THIS_MODULE;
 402         dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
 403         if (fastreg_support)
 404                 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 405         ibdev->local_dma_lkey = 0;
 406         ibdev->uverbs_cmd_mask =
 407             (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 408             (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 409             (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 410             (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 411             (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 412             (1ull << IB_USER_VERBS_CMD_REG_MR) |
 413             (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 414             (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 415             (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 416             (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 417             (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
 418             (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 419             (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 420             (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
 421             (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
 422             (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 423             (1ull << IB_USER_VERBS_CMD_POST_SEND) |
 424             (1ull << IB_USER_VERBS_CMD_POST_RECV);
 425         ibdev->node_type = RDMA_NODE_RNIC;
 426         strlcpy(ibdev->node_desc, C4IW_NODE_DESC, sizeof(ibdev->node_desc));
 427         ibdev->phys_port_cnt = sc->params.nports;
 428         ibdev->num_comp_vectors = 1;
 429         ibdev->dma_device = sc->dev;
 430         ibdev->query_device = c4iw_query_device;
 431         ibdev->query_port = c4iw_query_port;
 432         ibdev->modify_port = c4iw_modify_port;
 433         ibdev->query_pkey = c4iw_query_pkey;
 434         ibdev->query_gid = c4iw_query_gid;
 435         ibdev->alloc_ucontext = c4iw_alloc_ucontext;
 436         ibdev->dealloc_ucontext = c4iw_dealloc_ucontext;
 437         ibdev->mmap = c4iw_mmap;
 438         ibdev->alloc_pd = c4iw_allocate_pd;
 439         ibdev->dealloc_pd = c4iw_deallocate_pd;
 440         ibdev->create_ah = c4iw_ah_create;
 441         ibdev->destroy_ah = c4iw_ah_destroy;
 442         ibdev->create_qp = c4iw_create_qp;
 443         ibdev->modify_qp = c4iw_ib_modify_qp;
 444         ibdev->query_qp = c4iw_ib_query_qp;
 445         ibdev->destroy_qp = c4iw_destroy_qp;
 446         ibdev->create_cq = c4iw_create_cq;
 447         ibdev->destroy_cq = c4iw_destroy_cq;
 448         ibdev->resize_cq = c4iw_resize_cq;
 449         ibdev->poll_cq = c4iw_poll_cq;
 450         ibdev->get_dma_mr = c4iw_get_dma_mr;
 451         ibdev->reg_phys_mr = c4iw_register_phys_mem;
 452         ibdev->rereg_phys_mr = c4iw_reregister_phys_mem;
 453         ibdev->reg_user_mr = c4iw_reg_user_mr;
 454         ibdev->dereg_mr = c4iw_dereg_mr;
 455         ibdev->alloc_mw = c4iw_alloc_mw;
 456         ibdev->bind_mw = c4iw_bind_mw;
 457         ibdev->dealloc_mw = c4iw_dealloc_mw;
 458         ibdev->alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
 459         ibdev->alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
 460         ibdev->free_fast_reg_page_list = c4iw_free_fastreg_pbl;
 461         ibdev->attach_mcast = c4iw_multicast_attach;
 462         ibdev->detach_mcast = c4iw_multicast_detach;
 463         ibdev->process_mad = c4iw_process_mad;
 464         ibdev->req_notify_cq = c4iw_arm_cq;
 465         ibdev->post_send = c4iw_post_send;
 466         ibdev->post_recv = c4iw_post_receive;
 467         ibdev->uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
 468
 469         iwcm = kmalloc(sizeof(*iwcm), GFP_KERNEL);
 470         if (iwcm == NULL)
 471                 return (-ENOMEM);
 472
 473         iwcm->connect = c4iw_connect;
 474         iwcm->accept = c4iw_accept_cr;
 475         iwcm->reject = c4iw_reject_cr;
 476         iwcm->create_listen = c4iw_create_listen;
 477         iwcm->destroy_listen = c4iw_destroy_listen;
 478         iwcm->add_ref = c4iw_qp_add_ref;
 479         iwcm->rem_ref = c4iw_qp_rem_ref;
 480         iwcm->get_qp = c4iw_get_qp;
 481         ibdev->iwcm = iwcm;
 482
 483         ret = ib_register_device(&dev->ibdev, NULL);
 484         if (ret)
 485                 kfree(iwcm);
 486
 487         return (ret);
 488 }
 489
 490 void
 491 c4iw_unregister_device(struct c4iw_dev *dev)
 492 {
 493
 494         CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev,
 495             dev->rdev.adap);
 496         ib_unregister_device(&dev->ibdev);
 497         kfree(dev->ibdev.iwcm);
 498         return;
 499 }
 500 #endif