| 1 | /* |
| 2 | * Copyright (c) 2013, Cisco Systems, 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 | * BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | * |
| 32 | */ |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/init.h> |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/errno.h> |
| 37 | |
| 38 | #include <rdma/ib_user_verbs.h> |
| 39 | #include <rdma/ib_addr.h> |
| 40 | |
| 41 | #include "usnic_abi.h" |
| 42 | #include "usnic_ib.h" |
| 43 | #include "usnic_common_util.h" |
| 44 | #include "usnic_ib_qp_grp.h" |
| 45 | #include "usnic_ib_verbs.h" |
| 46 | #include "usnic_fwd.h" |
| 47 | #include "usnic_log.h" |
| 48 | #include "usnic_uiom.h" |
| 49 | #include "usnic_transport.h" |
| 50 | |
| 51 | #define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM |
| 52 | |
| 53 | const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = { |
| 54 | { /*USNIC_TRANSPORT_UNKNOWN*/ |
| 55 | .resources = { |
| 56 | {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, |
| 57 | }, |
| 58 | }, |
| 59 | { /*USNIC_TRANSPORT_ROCE_CUSTOM*/ |
| 60 | .resources = { |
| 61 | {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,}, |
| 62 | {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,}, |
| 63 | {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,}, |
| 64 | {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, |
| 65 | }, |
| 66 | }, |
| 67 | { /*USNIC_TRANSPORT_IPV4_UDP*/ |
| 68 | .resources = { |
| 69 | {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,}, |
| 70 | {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,}, |
| 71 | {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,}, |
| 72 | {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,}, |
| 73 | }, |
| 74 | }, |
| 75 | }; |
| 76 | |
| 77 | static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver) |
| 78 | { |
| 79 | *fw_ver = *((u64 *)fw_ver_str); |
| 80 | } |
| 81 | |
| 82 | static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp, |
| 83 | struct ib_udata *udata) |
| 84 | { |
| 85 | struct usnic_ib_dev *us_ibdev; |
| 86 | struct usnic_ib_create_qp_resp resp; |
| 87 | struct pci_dev *pdev; |
| 88 | struct vnic_dev_bar *bar; |
| 89 | struct usnic_vnic_res_chunk *chunk; |
| 90 | struct usnic_ib_qp_grp_flow *default_flow; |
| 91 | int i, err; |
| 92 | |
| 93 | memset(&resp, 0, sizeof(resp)); |
| 94 | |
| 95 | us_ibdev = qp_grp->vf->pf; |
| 96 | pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic); |
| 97 | if (!pdev) { |
| 98 | usnic_err("Failed to get pdev of qp_grp %d\n", |
| 99 | qp_grp->grp_id); |
| 100 | return -EFAULT; |
| 101 | } |
| 102 | |
| 103 | bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0); |
| 104 | if (!bar) { |
| 105 | usnic_err("Failed to get bar0 of qp_grp %d vf %s", |
| 106 | qp_grp->grp_id, pci_name(pdev)); |
| 107 | return -EFAULT; |
| 108 | } |
| 109 | |
| 110 | resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic); |
| 111 | resp.bar_bus_addr = bar->bus_addr; |
| 112 | resp.bar_len = bar->len; |
| 113 | |
| 114 | chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ); |
| 115 | if (IS_ERR(chunk)) { |
| 116 | usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", |
| 117 | usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ), |
| 118 | qp_grp->grp_id, |
| 119 | PTR_ERR(chunk)); |
| 120 | return PTR_ERR(chunk); |
| 121 | } |
| 122 | |
| 123 | WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ); |
| 124 | resp.rq_cnt = chunk->cnt; |
| 125 | for (i = 0; i < chunk->cnt; i++) |
| 126 | resp.rq_idx[i] = chunk->res[i]->vnic_idx; |
| 127 | |
| 128 | chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ); |
| 129 | if (IS_ERR(chunk)) { |
| 130 | usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", |
| 131 | usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ), |
| 132 | qp_grp->grp_id, |
| 133 | PTR_ERR(chunk)); |
| 134 | return PTR_ERR(chunk); |
| 135 | } |
| 136 | |
| 137 | WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ); |
| 138 | resp.wq_cnt = chunk->cnt; |
| 139 | for (i = 0; i < chunk->cnt; i++) |
| 140 | resp.wq_idx[i] = chunk->res[i]->vnic_idx; |
| 141 | |
| 142 | chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ); |
| 143 | if (IS_ERR(chunk)) { |
| 144 | usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n", |
| 145 | usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ), |
| 146 | qp_grp->grp_id, |
| 147 | PTR_ERR(chunk)); |
| 148 | return PTR_ERR(chunk); |
| 149 | } |
| 150 | |
| 151 | WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ); |
| 152 | resp.cq_cnt = chunk->cnt; |
| 153 | for (i = 0; i < chunk->cnt; i++) |
| 154 | resp.cq_idx[i] = chunk->res[i]->vnic_idx; |
| 155 | |
| 156 | default_flow = list_first_entry(&qp_grp->flows_lst, |
| 157 | struct usnic_ib_qp_grp_flow, link); |
| 158 | resp.transport = default_flow->trans_type; |
| 159 | |
| 160 | err = ib_copy_to_udata(udata, &resp, sizeof(resp)); |
| 161 | if (err) { |
| 162 | usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name); |
| 163 | return err; |
| 164 | } |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static struct usnic_ib_qp_grp* |
| 170 | find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev, |
| 171 | struct usnic_ib_pd *pd, |
| 172 | struct usnic_transport_spec *trans_spec, |
| 173 | struct usnic_vnic_res_spec *res_spec) |
| 174 | { |
| 175 | struct usnic_ib_vf *vf; |
| 176 | struct usnic_vnic *vnic; |
| 177 | struct usnic_ib_qp_grp *qp_grp; |
| 178 | struct device *dev, **dev_list; |
| 179 | int i; |
| 180 | |
| 181 | BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); |
| 182 | |
| 183 | if (list_empty(&us_ibdev->vf_dev_list)) { |
| 184 | usnic_info("No vfs to allocate\n"); |
| 185 | return NULL; |
| 186 | } |
| 187 | |
| 188 | if (usnic_ib_share_vf) { |
| 189 | /* Try to find resouces on a used vf which is in pd */ |
| 190 | dev_list = usnic_uiom_get_dev_list(pd->umem_pd); |
| 191 | if (IS_ERR(dev_list)) |
| 192 | return ERR_CAST(dev_list); |
| 193 | for (i = 0; dev_list[i]; i++) { |
| 194 | dev = dev_list[i]; |
| 195 | vf = pci_get_drvdata(to_pci_dev(dev)); |
| 196 | spin_lock(&vf->lock); |
| 197 | vnic = vf->vnic; |
| 198 | if (!usnic_vnic_check_room(vnic, res_spec)) { |
| 199 | usnic_dbg("Found used vnic %s from %s\n", |
| 200 | us_ibdev->ib_dev.name, |
| 201 | pci_name(usnic_vnic_get_pdev( |
| 202 | vnic))); |
| 203 | qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, |
| 204 | vf, pd, |
| 205 | res_spec, |
| 206 | trans_spec); |
| 207 | |
| 208 | spin_unlock(&vf->lock); |
| 209 | goto qp_grp_check; |
| 210 | } |
| 211 | spin_unlock(&vf->lock); |
| 212 | |
| 213 | } |
| 214 | usnic_uiom_free_dev_list(dev_list); |
| 215 | } |
| 216 | |
| 217 | /* Try to find resources on an unused vf */ |
| 218 | list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) { |
| 219 | spin_lock(&vf->lock); |
| 220 | vnic = vf->vnic; |
| 221 | if (vf->qp_grp_ref_cnt == 0 && |
| 222 | usnic_vnic_check_room(vnic, res_spec) == 0) { |
| 223 | qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, |
| 224 | pd, res_spec, |
| 225 | trans_spec); |
| 226 | |
| 227 | spin_unlock(&vf->lock); |
| 228 | goto qp_grp_check; |
| 229 | } |
| 230 | spin_unlock(&vf->lock); |
| 231 | } |
| 232 | |
| 233 | usnic_info("No free qp grp found on %s\n", us_ibdev->ib_dev.name); |
| 234 | return ERR_PTR(-ENOMEM); |
| 235 | |
| 236 | qp_grp_check: |
| 237 | if (IS_ERR_OR_NULL(qp_grp)) { |
| 238 | usnic_err("Failed to allocate qp_grp\n"); |
| 239 | return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM); |
| 240 | } |
| 241 | return qp_grp; |
| 242 | } |
| 243 | |
| 244 | static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) |
| 245 | { |
| 246 | struct usnic_ib_vf *vf = qp_grp->vf; |
| 247 | |
| 248 | WARN_ON(qp_grp->state != IB_QPS_RESET); |
| 249 | |
| 250 | spin_lock(&vf->lock); |
| 251 | usnic_ib_qp_grp_destroy(qp_grp); |
| 252 | spin_unlock(&vf->lock); |
| 253 | } |
| 254 | |
| 255 | static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd) |
| 256 | { |
| 257 | if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN || |
| 258 | cmd.spec.trans_type >= USNIC_TRANSPORT_MAX) |
| 259 | return -EINVAL; |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | /* Start of ib callback functions */ |
| 265 | |
| 266 | enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device, |
| 267 | u8 port_num) |
| 268 | { |
| 269 | return IB_LINK_LAYER_ETHERNET; |
| 270 | } |
| 271 | |
| 272 | int usnic_ib_query_device(struct ib_device *ibdev, |
| 273 | struct ib_device_attr *props, |
| 274 | struct ib_udata *uhw) |
| 275 | { |
| 276 | struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); |
| 277 | union ib_gid gid; |
| 278 | struct ethtool_drvinfo info; |
| 279 | int qp_per_vf; |
| 280 | |
| 281 | usnic_dbg("\n"); |
| 282 | if (uhw->inlen || uhw->outlen) |
| 283 | return -EINVAL; |
| 284 | |
| 285 | mutex_lock(&us_ibdev->usdev_lock); |
| 286 | us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); |
| 287 | memset(props, 0, sizeof(*props)); |
| 288 | usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, |
| 289 | &gid.raw[0]); |
| 290 | memcpy(&props->sys_image_guid, &gid.global.interface_id, |
| 291 | sizeof(gid.global.interface_id)); |
| 292 | usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver); |
| 293 | props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE; |
| 294 | props->page_size_cap = USNIC_UIOM_PAGE_SIZE; |
| 295 | props->vendor_id = PCI_VENDOR_ID_CISCO; |
| 296 | props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC; |
| 297 | props->hw_ver = us_ibdev->pdev->subsystem_device; |
| 298 | qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ], |
| 299 | us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]); |
| 300 | props->max_qp = qp_per_vf * |
| 301 | kref_read(&us_ibdev->vf_cnt); |
| 302 | props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT | |
| 303 | IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK; |
| 304 | props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] * |
| 305 | kref_read(&us_ibdev->vf_cnt); |
| 306 | props->max_pd = USNIC_UIOM_MAX_PD_CNT; |
| 307 | props->max_mr = USNIC_UIOM_MAX_MR_CNT; |
| 308 | props->local_ca_ack_delay = 0; |
| 309 | props->max_pkeys = 0; |
| 310 | props->atomic_cap = IB_ATOMIC_NONE; |
| 311 | props->masked_atomic_cap = props->atomic_cap; |
| 312 | props->max_qp_rd_atom = 0; |
| 313 | props->max_qp_init_rd_atom = 0; |
| 314 | props->max_res_rd_atom = 0; |
| 315 | props->max_srq = 0; |
| 316 | props->max_srq_wr = 0; |
| 317 | props->max_srq_sge = 0; |
| 318 | props->max_fast_reg_page_list_len = 0; |
| 319 | props->max_mcast_grp = 0; |
| 320 | props->max_mcast_qp_attach = 0; |
| 321 | props->max_total_mcast_qp_attach = 0; |
| 322 | props->max_map_per_fmr = 0; |
| 323 | /* Owned by Userspace |
| 324 | * max_qp_wr, max_sge, max_sge_rd, max_cqe */ |
| 325 | mutex_unlock(&us_ibdev->usdev_lock); |
| 326 | |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | int usnic_ib_query_port(struct ib_device *ibdev, u8 port, |
| 331 | struct ib_port_attr *props) |
| 332 | { |
| 333 | struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); |
| 334 | |
| 335 | usnic_dbg("\n"); |
| 336 | |
| 337 | mutex_lock(&us_ibdev->usdev_lock); |
| 338 | if (ib_get_eth_speed(ibdev, port, &props->active_speed, |
| 339 | &props->active_width)) { |
| 340 | mutex_unlock(&us_ibdev->usdev_lock); |
| 341 | return -EINVAL; |
| 342 | } |
| 343 | |
| 344 | /* props being zeroed by the caller, avoid zeroing it here */ |
| 345 | |
| 346 | props->lid = 0; |
| 347 | props->lmc = 1; |
| 348 | props->sm_lid = 0; |
| 349 | props->sm_sl = 0; |
| 350 | |
| 351 | if (!us_ibdev->ufdev->link_up) { |
| 352 | props->state = IB_PORT_DOWN; |
| 353 | props->phys_state = 3; |
| 354 | } else if (!us_ibdev->ufdev->inaddr) { |
| 355 | props->state = IB_PORT_INIT; |
| 356 | props->phys_state = 4; |
| 357 | } else { |
| 358 | props->state = IB_PORT_ACTIVE; |
| 359 | props->phys_state = 5; |
| 360 | } |
| 361 | |
| 362 | props->port_cap_flags = 0; |
| 363 | props->gid_tbl_len = 1; |
| 364 | props->pkey_tbl_len = 1; |
| 365 | props->bad_pkey_cntr = 0; |
| 366 | props->qkey_viol_cntr = 0; |
| 367 | props->max_mtu = IB_MTU_4096; |
| 368 | props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu); |
| 369 | /* Userspace will adjust for hdrs */ |
| 370 | props->max_msg_sz = us_ibdev->ufdev->mtu; |
| 371 | props->max_vl_num = 1; |
| 372 | mutex_unlock(&us_ibdev->usdev_lock); |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr, |
| 378 | int qp_attr_mask, |
| 379 | struct ib_qp_init_attr *qp_init_attr) |
| 380 | { |
| 381 | struct usnic_ib_qp_grp *qp_grp; |
| 382 | struct usnic_ib_vf *vf; |
| 383 | int err; |
| 384 | |
| 385 | usnic_dbg("\n"); |
| 386 | |
| 387 | memset(qp_attr, 0, sizeof(*qp_attr)); |
| 388 | memset(qp_init_attr, 0, sizeof(*qp_init_attr)); |
| 389 | |
| 390 | qp_grp = to_uqp_grp(qp); |
| 391 | vf = qp_grp->vf; |
| 392 | mutex_lock(&vf->pf->usdev_lock); |
| 393 | usnic_dbg("\n"); |
| 394 | qp_attr->qp_state = qp_grp->state; |
| 395 | qp_attr->cur_qp_state = qp_grp->state; |
| 396 | |
| 397 | switch (qp_grp->ibqp.qp_type) { |
| 398 | case IB_QPT_UD: |
| 399 | qp_attr->qkey = 0; |
| 400 | break; |
| 401 | default: |
| 402 | usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type); |
| 403 | err = -EINVAL; |
| 404 | goto err_out; |
| 405 | } |
| 406 | |
| 407 | mutex_unlock(&vf->pf->usdev_lock); |
| 408 | return 0; |
| 409 | |
| 410 | err_out: |
| 411 | mutex_unlock(&vf->pf->usdev_lock); |
| 412 | return err; |
| 413 | } |
| 414 | |
| 415 | int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index, |
| 416 | union ib_gid *gid) |
| 417 | { |
| 418 | |
| 419 | struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); |
| 420 | usnic_dbg("\n"); |
| 421 | |
| 422 | if (index > 1) |
| 423 | return -EINVAL; |
| 424 | |
| 425 | mutex_lock(&us_ibdev->usdev_lock); |
| 426 | memset(&(gid->raw[0]), 0, sizeof(gid->raw)); |
| 427 | usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr, |
| 428 | &gid->raw[0]); |
| 429 | mutex_unlock(&us_ibdev->usdev_lock); |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num) |
| 435 | { |
| 436 | struct usnic_ib_dev *us_ibdev = to_usdev(device); |
| 437 | |
| 438 | if (us_ibdev->netdev) |
| 439 | dev_hold(us_ibdev->netdev); |
| 440 | |
| 441 | return us_ibdev->netdev; |
| 442 | } |
| 443 | |
| 444 | int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, |
| 445 | u16 *pkey) |
| 446 | { |
| 447 | if (index > 1) |
| 448 | return -EINVAL; |
| 449 | |
| 450 | *pkey = 0xffff; |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev, |
| 455 | struct ib_ucontext *context, |
| 456 | struct ib_udata *udata) |
| 457 | { |
| 458 | struct usnic_ib_pd *pd; |
| 459 | void *umem_pd; |
| 460 | |
| 461 | usnic_dbg("\n"); |
| 462 | |
| 463 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); |
| 464 | if (!pd) |
| 465 | return ERR_PTR(-ENOMEM); |
| 466 | |
| 467 | umem_pd = pd->umem_pd = usnic_uiom_alloc_pd(); |
| 468 | if (IS_ERR_OR_NULL(umem_pd)) { |
| 469 | kfree(pd); |
| 470 | return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM); |
| 471 | } |
| 472 | |
| 473 | usnic_info("domain 0x%p allocated for context 0x%p and device %s\n", |
| 474 | pd, context, ibdev->name); |
| 475 | return &pd->ibpd; |
| 476 | } |
| 477 | |
| 478 | int usnic_ib_dealloc_pd(struct ib_pd *pd) |
| 479 | { |
| 480 | usnic_info("freeing domain 0x%p\n", pd); |
| 481 | |
| 482 | usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd); |
| 483 | kfree(pd); |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd, |
| 488 | struct ib_qp_init_attr *init_attr, |
| 489 | struct ib_udata *udata) |
| 490 | { |
| 491 | int err; |
| 492 | struct usnic_ib_dev *us_ibdev; |
| 493 | struct usnic_ib_qp_grp *qp_grp; |
| 494 | struct usnic_ib_ucontext *ucontext; |
| 495 | int cq_cnt; |
| 496 | struct usnic_vnic_res_spec res_spec; |
| 497 | struct usnic_ib_create_qp_cmd cmd; |
| 498 | struct usnic_transport_spec trans_spec; |
| 499 | |
| 500 | usnic_dbg("\n"); |
| 501 | |
| 502 | ucontext = to_uucontext(pd->uobject->context); |
| 503 | us_ibdev = to_usdev(pd->device); |
| 504 | |
| 505 | if (init_attr->create_flags) |
| 506 | return ERR_PTR(-EINVAL); |
| 507 | |
| 508 | err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); |
| 509 | if (err) { |
| 510 | usnic_err("%s: cannot copy udata for create_qp\n", |
| 511 | us_ibdev->ib_dev.name); |
| 512 | return ERR_PTR(-EINVAL); |
| 513 | } |
| 514 | |
| 515 | err = create_qp_validate_user_data(cmd); |
| 516 | if (err) { |
| 517 | usnic_err("%s: Failed to validate user data\n", |
| 518 | us_ibdev->ib_dev.name); |
| 519 | return ERR_PTR(-EINVAL); |
| 520 | } |
| 521 | |
| 522 | if (init_attr->qp_type != IB_QPT_UD) { |
| 523 | usnic_err("%s asked to make a non-UD QP: %d\n", |
| 524 | us_ibdev->ib_dev.name, init_attr->qp_type); |
| 525 | return ERR_PTR(-EINVAL); |
| 526 | } |
| 527 | |
| 528 | trans_spec = cmd.spec; |
| 529 | mutex_lock(&us_ibdev->usdev_lock); |
| 530 | cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2; |
| 531 | res_spec = min_transport_spec[trans_spec.trans_type]; |
| 532 | usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt); |
| 533 | qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd), |
| 534 | &trans_spec, |
| 535 | &res_spec); |
| 536 | if (IS_ERR_OR_NULL(qp_grp)) { |
| 537 | err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM; |
| 538 | goto out_release_mutex; |
| 539 | } |
| 540 | |
| 541 | err = usnic_ib_fill_create_qp_resp(qp_grp, udata); |
| 542 | if (err) { |
| 543 | err = -EBUSY; |
| 544 | goto out_release_qp_grp; |
| 545 | } |
| 546 | |
| 547 | qp_grp->ctx = ucontext; |
| 548 | list_add_tail(&qp_grp->link, &ucontext->qp_grp_list); |
| 549 | usnic_ib_log_vf(qp_grp->vf); |
| 550 | mutex_unlock(&us_ibdev->usdev_lock); |
| 551 | return &qp_grp->ibqp; |
| 552 | |
| 553 | out_release_qp_grp: |
| 554 | qp_grp_destroy(qp_grp); |
| 555 | out_release_mutex: |
| 556 | mutex_unlock(&us_ibdev->usdev_lock); |
| 557 | return ERR_PTR(err); |
| 558 | } |
| 559 | |
| 560 | int usnic_ib_destroy_qp(struct ib_qp *qp) |
| 561 | { |
| 562 | struct usnic_ib_qp_grp *qp_grp; |
| 563 | struct usnic_ib_vf *vf; |
| 564 | |
| 565 | usnic_dbg("\n"); |
| 566 | |
| 567 | qp_grp = to_uqp_grp(qp); |
| 568 | vf = qp_grp->vf; |
| 569 | mutex_lock(&vf->pf->usdev_lock); |
| 570 | if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) { |
| 571 | usnic_err("Failed to move qp grp %u to reset\n", |
| 572 | qp_grp->grp_id); |
| 573 | } |
| 574 | |
| 575 | list_del(&qp_grp->link); |
| 576 | qp_grp_destroy(qp_grp); |
| 577 | mutex_unlock(&vf->pf->usdev_lock); |
| 578 | |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, |
| 583 | int attr_mask, struct ib_udata *udata) |
| 584 | { |
| 585 | struct usnic_ib_qp_grp *qp_grp; |
| 586 | int status; |
| 587 | usnic_dbg("\n"); |
| 588 | |
| 589 | qp_grp = to_uqp_grp(ibqp); |
| 590 | |
| 591 | mutex_lock(&qp_grp->vf->pf->usdev_lock); |
| 592 | if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) { |
| 593 | /* usnic devices only have one port */ |
| 594 | status = -EINVAL; |
| 595 | goto out_unlock; |
| 596 | } |
| 597 | if (attr_mask & IB_QP_STATE) { |
| 598 | status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL); |
| 599 | } else { |
| 600 | usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask); |
| 601 | status = -EINVAL; |
| 602 | } |
| 603 | |
| 604 | out_unlock: |
| 605 | mutex_unlock(&qp_grp->vf->pf->usdev_lock); |
| 606 | return status; |
| 607 | } |
| 608 | |
| 609 | struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, |
| 610 | const struct ib_cq_init_attr *attr, |
| 611 | struct ib_ucontext *context, |
| 612 | struct ib_udata *udata) |
| 613 | { |
| 614 | struct ib_cq *cq; |
| 615 | |
| 616 | usnic_dbg("\n"); |
| 617 | if (attr->flags) |
| 618 | return ERR_PTR(-EINVAL); |
| 619 | |
| 620 | cq = kzalloc(sizeof(*cq), GFP_KERNEL); |
| 621 | if (!cq) |
| 622 | return ERR_PTR(-EBUSY); |
| 623 | |
| 624 | return cq; |
| 625 | } |
| 626 | |
| 627 | int usnic_ib_destroy_cq(struct ib_cq *cq) |
| 628 | { |
| 629 | usnic_dbg("\n"); |
| 630 | kfree(cq); |
| 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length, |
| 635 | u64 virt_addr, int access_flags, |
| 636 | struct ib_udata *udata) |
| 637 | { |
| 638 | struct usnic_ib_mr *mr; |
| 639 | int err; |
| 640 | |
| 641 | usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start, |
| 642 | virt_addr, length); |
| 643 | |
| 644 | mr = kzalloc(sizeof(*mr), GFP_KERNEL); |
| 645 | if (!mr) |
| 646 | return ERR_PTR(-ENOMEM); |
| 647 | |
| 648 | mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length, |
| 649 | access_flags, 0); |
| 650 | if (IS_ERR_OR_NULL(mr->umem)) { |
| 651 | err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT; |
| 652 | goto err_free; |
| 653 | } |
| 654 | |
| 655 | mr->ibmr.lkey = mr->ibmr.rkey = 0; |
| 656 | return &mr->ibmr; |
| 657 | |
| 658 | err_free: |
| 659 | kfree(mr); |
| 660 | return ERR_PTR(err); |
| 661 | } |
| 662 | |
| 663 | int usnic_ib_dereg_mr(struct ib_mr *ibmr) |
| 664 | { |
| 665 | struct usnic_ib_mr *mr = to_umr(ibmr); |
| 666 | |
| 667 | usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length); |
| 668 | |
| 669 | usnic_uiom_reg_release(mr->umem, ibmr->uobject->context); |
| 670 | kfree(mr); |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev, |
| 675 | struct ib_udata *udata) |
| 676 | { |
| 677 | struct usnic_ib_ucontext *context; |
| 678 | struct usnic_ib_dev *us_ibdev = to_usdev(ibdev); |
| 679 | usnic_dbg("\n"); |
| 680 | |
| 681 | context = kmalloc(sizeof(*context), GFP_KERNEL); |
| 682 | if (!context) |
| 683 | return ERR_PTR(-ENOMEM); |
| 684 | |
| 685 | INIT_LIST_HEAD(&context->qp_grp_list); |
| 686 | mutex_lock(&us_ibdev->usdev_lock); |
| 687 | list_add_tail(&context->link, &us_ibdev->ctx_list); |
| 688 | mutex_unlock(&us_ibdev->usdev_lock); |
| 689 | |
| 690 | return &context->ibucontext; |
| 691 | } |
| 692 | |
| 693 | int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext) |
| 694 | { |
| 695 | struct usnic_ib_ucontext *context = to_uucontext(ibcontext); |
| 696 | struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device); |
| 697 | usnic_dbg("\n"); |
| 698 | |
| 699 | mutex_lock(&us_ibdev->usdev_lock); |
| 700 | BUG_ON(!list_empty(&context->qp_grp_list)); |
| 701 | list_del(&context->link); |
| 702 | mutex_unlock(&us_ibdev->usdev_lock); |
| 703 | kfree(context); |
| 704 | return 0; |
| 705 | } |
| 706 | |
| 707 | int usnic_ib_mmap(struct ib_ucontext *context, |
| 708 | struct vm_area_struct *vma) |
| 709 | { |
| 710 | struct usnic_ib_ucontext *uctx = to_ucontext(context); |
| 711 | struct usnic_ib_dev *us_ibdev; |
| 712 | struct usnic_ib_qp_grp *qp_grp; |
| 713 | struct usnic_ib_vf *vf; |
| 714 | struct vnic_dev_bar *bar; |
| 715 | dma_addr_t bus_addr; |
| 716 | unsigned int len; |
| 717 | unsigned int vfid; |
| 718 | |
| 719 | usnic_dbg("\n"); |
| 720 | |
| 721 | us_ibdev = to_usdev(context->device); |
| 722 | vma->vm_flags |= VM_IO; |
| 723 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 724 | vfid = vma->vm_pgoff; |
| 725 | usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n", |
| 726 | vma->vm_pgoff, PAGE_SHIFT, vfid); |
| 727 | |
| 728 | mutex_lock(&us_ibdev->usdev_lock); |
| 729 | list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) { |
| 730 | vf = qp_grp->vf; |
| 731 | if (usnic_vnic_get_index(vf->vnic) == vfid) { |
| 732 | bar = usnic_vnic_get_bar(vf->vnic, 0); |
| 733 | if ((vma->vm_end - vma->vm_start) != bar->len) { |
| 734 | usnic_err("Bar0 Len %lu - Request map %lu\n", |
| 735 | bar->len, |
| 736 | vma->vm_end - vma->vm_start); |
| 737 | mutex_unlock(&us_ibdev->usdev_lock); |
| 738 | return -EINVAL; |
| 739 | } |
| 740 | bus_addr = bar->bus_addr; |
| 741 | len = bar->len; |
| 742 | usnic_dbg("bus: %pa vaddr: %p size: %ld\n", |
| 743 | &bus_addr, bar->vaddr, bar->len); |
| 744 | mutex_unlock(&us_ibdev->usdev_lock); |
| 745 | |
| 746 | return remap_pfn_range(vma, |
| 747 | vma->vm_start, |
| 748 | bus_addr >> PAGE_SHIFT, |
| 749 | len, vma->vm_page_prot); |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | mutex_unlock(&us_ibdev->usdev_lock); |
| 754 | usnic_err("No VF %u found\n", vfid); |
| 755 | return -EINVAL; |
| 756 | } |
| 757 | |
| 758 | /* In ib callbacks section - Start of stub funcs */ |
| 759 | struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd, |
| 760 | struct rdma_ah_attr *ah_attr, |
| 761 | struct ib_udata *udata) |
| 762 | |
| 763 | { |
| 764 | usnic_dbg("\n"); |
| 765 | return ERR_PTR(-EPERM); |
| 766 | } |
| 767 | |
| 768 | int usnic_ib_destroy_ah(struct ib_ah *ah) |
| 769 | { |
| 770 | usnic_dbg("\n"); |
| 771 | return -EINVAL; |
| 772 | } |
| 773 | |
| 774 | int usnic_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, |
| 775 | const struct ib_send_wr **bad_wr) |
| 776 | { |
| 777 | usnic_dbg("\n"); |
| 778 | return -EINVAL; |
| 779 | } |
| 780 | |
| 781 | int usnic_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, |
| 782 | const struct ib_recv_wr **bad_wr) |
| 783 | { |
| 784 | usnic_dbg("\n"); |
| 785 | return -EINVAL; |
| 786 | } |
| 787 | |
| 788 | int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries, |
| 789 | struct ib_wc *wc) |
| 790 | { |
| 791 | usnic_dbg("\n"); |
| 792 | return -EINVAL; |
| 793 | } |
| 794 | |
| 795 | int usnic_ib_req_notify_cq(struct ib_cq *cq, |
| 796 | enum ib_cq_notify_flags flags) |
| 797 | { |
| 798 | usnic_dbg("\n"); |
| 799 | return -EINVAL; |
| 800 | } |
| 801 | |
| 802 | struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc) |
| 803 | { |
| 804 | usnic_dbg("\n"); |
| 805 | return ERR_PTR(-ENOMEM); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | /* In ib callbacks section - End of stub funcs */ |
| 810 | /* End of ib callbacks section */ |