1/* 2 * Copyright 2011 Cisco Systems, Inc. All rights reserved. 3 * 4 * This program is free software; you may redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; version 2 of the License. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 15 * SOFTWARE. 16 * 17 */ 18 19#include <linux/kernel.h> 20#include <linux/string.h> 21#include <linux/errno.h> 22#include <linux/types.h> 23#include <linux/netdevice.h> 24#include <linux/etherdevice.h> 25#include <linux/rtnetlink.h> 26#include <net/ip.h> 27 28#include "vnic_vic.h" 29#include "enic_res.h" 30#include "enic.h" 31#include "enic_dev.h" 32#include "enic_pp.h" 33 34/* 35 * Checks validity of vf index that came in 36 * port profile request 37 */ 38int enic_is_valid_pp_vf(struct enic *enic, int vf, int *err) 39{ 40 if (vf != PORT_SELF_VF) { 41#ifdef CONFIG_PCI_IOV 42 if (enic_sriov_enabled(enic)) { 43 if (vf < 0 || vf >= enic->num_vfs) { 44 *err = -EINVAL; 45 goto err_out; 46 } 47 } else { 48 *err = -EOPNOTSUPP; 49 goto err_out; 50 } 51#else 52 *err = -EOPNOTSUPP; 53 goto err_out; 54#endif 55 } 56 57 if (vf == PORT_SELF_VF && !enic_is_dynamic(enic)) { 58 *err = -EOPNOTSUPP; 59 goto err_out; 60 } 61 62 *err = 0; 63 return 1; 64 65err_out: 66 return 0; 67} 68 69static int enic_set_port_profile(struct enic *enic, int vf) 70{ 71 struct net_device *netdev = enic->netdev; 72 struct enic_port_profile *pp; 73 struct vic_provinfo *vp; 74 const u8 oui[3] = VIC_PROVINFO_CISCO_OUI; 75 const __be16 os_type = htons(VIC_GENERIC_PROV_OS_TYPE_LINUX); 76 char uuid_str[38]; 77 char client_mac_str[18]; 78 u8 *client_mac; 79 int err; 80 81 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 82 if (err) 83 return err; 84 85 if (!(pp->set & ENIC_SET_NAME) || !strlen(pp->name)) 86 return -EINVAL; 87 88 vp = vic_provinfo_alloc(GFP_KERNEL, oui, 89 VIC_PROVINFO_GENERIC_TYPE); 90 if (!vp) 91 return -ENOMEM; 92 93 VIC_PROVINFO_ADD_TLV(vp, 94 VIC_GENERIC_PROV_TLV_PORT_PROFILE_NAME_STR, 95 strlen(pp->name) + 1, pp->name); 96 97 if (!is_zero_ether_addr(pp->mac_addr)) { 98 client_mac = pp->mac_addr; 99 } else if (vf == PORT_SELF_VF) { 100 client_mac = netdev->dev_addr; 101 } else { 102 netdev_err(netdev, "Cannot find pp mac address " 103 "for VF %d\n", vf); 104 err = -EINVAL; 105 goto add_tlv_failure; 106 } 107 108 VIC_PROVINFO_ADD_TLV(vp, 109 VIC_GENERIC_PROV_TLV_CLIENT_MAC_ADDR, 110 ETH_ALEN, client_mac); 111 112 snprintf(client_mac_str, sizeof(client_mac_str), "%pM", client_mac); 113 VIC_PROVINFO_ADD_TLV(vp, 114 VIC_GENERIC_PROV_TLV_CLUSTER_PORT_UUID_STR, 115 sizeof(client_mac_str), client_mac_str); 116 117 if (pp->set & ENIC_SET_INSTANCE) { 118 sprintf(uuid_str, "%pUB", pp->instance_uuid); 119 VIC_PROVINFO_ADD_TLV(vp, 120 VIC_GENERIC_PROV_TLV_CLIENT_UUID_STR, 121 sizeof(uuid_str), uuid_str); 122 } 123 124 if (pp->set & ENIC_SET_HOST) { 125 sprintf(uuid_str, "%pUB", pp->host_uuid); 126 VIC_PROVINFO_ADD_TLV(vp, 127 VIC_GENERIC_PROV_TLV_HOST_UUID_STR, 128 sizeof(uuid_str), uuid_str); 129 } 130 131 VIC_PROVINFO_ADD_TLV(vp, 132 VIC_GENERIC_PROV_TLV_OS_TYPE, 133 sizeof(os_type), &os_type); 134 135 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_init_prov2, (u8 *)vp, 136 vic_provinfo_size(vp)); 137 err = enic_dev_status_to_errno(err); 138 139add_tlv_failure: 140 vic_provinfo_free(vp); 141 142 return err; 143} 144 145static int enic_unset_port_profile(struct enic *enic, int vf) 146{ 147 int err; 148 149 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_deinit); 150 if (err) 151 return enic_dev_status_to_errno(err); 152 153 if (vf == PORT_SELF_VF) 154 enic_reset_addr_lists(enic); 155 156 return 0; 157} 158 159static int enic_are_pp_different(struct enic_port_profile *pp1, 160 struct enic_port_profile *pp2) 161{ 162 return strcmp(pp1->name, pp2->name) | !!memcmp(pp1->instance_uuid, 163 pp2->instance_uuid, PORT_UUID_MAX) | 164 !!memcmp(pp1->host_uuid, pp2->host_uuid, PORT_UUID_MAX) | 165 !ether_addr_equal(pp1->mac_addr, pp2->mac_addr); 166} 167 168static int enic_pp_preassociate(struct enic *enic, int vf, 169 struct enic_port_profile *prev_pp, int *restore_pp); 170static int enic_pp_disassociate(struct enic *enic, int vf, 171 struct enic_port_profile *prev_pp, int *restore_pp); 172static int enic_pp_preassociate_rr(struct enic *enic, int vf, 173 struct enic_port_profile *prev_pp, int *restore_pp); 174static int enic_pp_associate(struct enic *enic, int vf, 175 struct enic_port_profile *prev_pp, int *restore_pp); 176 177static int (*enic_pp_handlers[])(struct enic *enic, int vf, 178 struct enic_port_profile *prev_state, 179 int *restore_pp) = { 180 [PORT_REQUEST_PREASSOCIATE] = enic_pp_preassociate, 181 [PORT_REQUEST_PREASSOCIATE_RR] = enic_pp_preassociate_rr, 182 [PORT_REQUEST_ASSOCIATE] = enic_pp_associate, 183 [PORT_REQUEST_DISASSOCIATE] = enic_pp_disassociate, 184}; 185 186static const int enic_pp_handlers_count = 187 ARRAY_SIZE(enic_pp_handlers); 188 189static int enic_pp_preassociate(struct enic *enic, int vf, 190 struct enic_port_profile *prev_pp, int *restore_pp) 191{ 192 return -EOPNOTSUPP; 193} 194 195static int enic_pp_disassociate(struct enic *enic, int vf, 196 struct enic_port_profile *prev_pp, int *restore_pp) 197{ 198 struct net_device *netdev = enic->netdev; 199 struct enic_port_profile *pp; 200 int err; 201 202 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 203 if (err) 204 return err; 205 206 /* Deregister mac addresses */ 207 if (!is_zero_ether_addr(pp->mac_addr)) 208 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_del_addr, 209 pp->mac_addr); 210 else if (vf == PORT_SELF_VF && !is_zero_ether_addr(netdev->dev_addr)) 211 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_del_addr, 212 netdev->dev_addr); 213 214 return enic_unset_port_profile(enic, vf); 215} 216 217static int enic_pp_preassociate_rr(struct enic *enic, int vf, 218 struct enic_port_profile *prev_pp, int *restore_pp) 219{ 220 struct enic_port_profile *pp; 221 int err; 222 int active = 0; 223 224 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 225 if (err) 226 return err; 227 228 if (pp->request != PORT_REQUEST_ASSOCIATE) { 229 /* If pre-associate is not part of an associate. 230 We always disassociate first */ 231 err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE](enic, vf, 232 prev_pp, restore_pp); 233 if (err) 234 return err; 235 236 *restore_pp = 0; 237 } 238 239 *restore_pp = 0; 240 241 err = enic_set_port_profile(enic, vf); 242 if (err) 243 return err; 244 245 /* If pre-associate is not part of an associate. */ 246 if (pp->request != PORT_REQUEST_ASSOCIATE) { 247 /* Enable device as standby */ 248 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_enable2, 249 active); 250 err = enic_dev_status_to_errno(err); 251 } 252 253 return err; 254} 255 256static int enic_pp_associate(struct enic *enic, int vf, 257 struct enic_port_profile *prev_pp, int *restore_pp) 258{ 259 struct net_device *netdev = enic->netdev; 260 struct enic_port_profile *pp; 261 int err; 262 int active = 1; 263 264 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 265 if (err) 266 return err; 267 268 /* Check if a pre-associate was called before */ 269 if (prev_pp->request != PORT_REQUEST_PREASSOCIATE_RR || 270 (prev_pp->request == PORT_REQUEST_PREASSOCIATE_RR && 271 enic_are_pp_different(prev_pp, pp))) { 272 err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE]( 273 enic, vf, prev_pp, restore_pp); 274 if (err) 275 return err; 276 277 *restore_pp = 0; 278 } 279 280 err = enic_pp_handlers[PORT_REQUEST_PREASSOCIATE_RR]( 281 enic, vf, prev_pp, restore_pp); 282 if (err) 283 return err; 284 285 *restore_pp = 0; 286 287 /* Enable device as active */ 288 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_enable2, active); 289 err = enic_dev_status_to_errno(err); 290 if (err) 291 return err; 292 293 /* Register mac address */ 294 if (!is_zero_ether_addr(pp->mac_addr)) 295 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_add_addr, 296 pp->mac_addr); 297 else if (vf == PORT_SELF_VF && !is_zero_ether_addr(netdev->dev_addr)) 298 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, vnic_dev_add_addr, 299 netdev->dev_addr); 300 301 return 0; 302} 303 304int enic_process_set_pp_request(struct enic *enic, int vf, 305 struct enic_port_profile *prev_pp, int *restore_pp) 306{ 307 struct enic_port_profile *pp; 308 int err; 309 310 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 311 if (err) 312 return err; 313 314 if (pp->request >= enic_pp_handlers_count 315 || !enic_pp_handlers[pp->request]) 316 return -EOPNOTSUPP; 317 318 return enic_pp_handlers[pp->request](enic, vf, prev_pp, restore_pp); 319} 320 321int enic_process_get_pp_request(struct enic *enic, int vf, 322 int request, u16 *response) 323{ 324 int err, status = ERR_SUCCESS; 325 326 switch (request) { 327 328 case PORT_REQUEST_PREASSOCIATE_RR: 329 case PORT_REQUEST_ASSOCIATE: 330 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 331 vnic_dev_enable2_done, &status); 332 break; 333 334 case PORT_REQUEST_DISASSOCIATE: 335 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 336 vnic_dev_deinit_done, &status); 337 break; 338 339 default: 340 return -EINVAL; 341 } 342 343 if (err) 344 status = err; 345 346 switch (status) { 347 case ERR_SUCCESS: 348 *response = PORT_PROFILE_RESPONSE_SUCCESS; 349 break; 350 case ERR_EINVAL: 351 *response = PORT_PROFILE_RESPONSE_INVALID; 352 break; 353 case ERR_EBADSTATE: 354 *response = PORT_PROFILE_RESPONSE_BADSTATE; 355 break; 356 case ERR_ENOMEM: 357 *response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES; 358 break; 359 case ERR_EINPROGRESS: 360 *response = PORT_PROFILE_RESPONSE_INPROGRESS; 361 break; 362 default: 363 *response = PORT_PROFILE_RESPONSE_ERROR; 364 break; 365 } 366 367 return 0; 368} 369