1 /* Broadcom NetXtreme-C/E network driver. 2 * 3 * Copyright (c) 2016-2018 Broadcom Limited 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation. 8 */ 9 10 #include <linux/module.h> 11 12 #include <linux/kernel.h> 13 #include <linux/errno.h> 14 #include <linux/interrupt.h> 15 #include <linux/pci.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <linux/bitops.h> 19 #include <linux/irq.h> 20 #include <asm/byteorder.h> 21 #include <linux/bitmap.h> 22 #include <linux/auxiliary_bus.h> 23 24 #include "bnxt_hsi.h" 25 #include "bnxt.h" 26 #include "bnxt_hwrm.h" 27 #include "bnxt_ulp.h" 28 29 static DEFINE_IDA(bnxt_aux_dev_ids); 30 31 static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent) 32 { 33 struct bnxt_en_dev *edev = bp->edev; 34 int num_msix, i; 35 36 if (!edev->ulp_tbl->msix_requested) { 37 netdev_warn(bp->dev, "Requested MSI-X vectors insufficient\n"); 38 return; 39 } 40 num_msix = edev->ulp_tbl->msix_requested; 41 for (i = 0; i < num_msix; i++) { 42 ent[i].vector = bp->irq_tbl[i].vector; 43 ent[i].ring_idx = i; 44 if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS) 45 ent[i].db_offset = bp->db_offset; 46 else 47 ent[i].db_offset = i * 0x80; 48 } 49 } 50 51 int bnxt_get_ulp_msix_num(struct bnxt *bp) 52 { 53 if (bp->edev) 54 return bp->edev->ulp_num_msix_vec; 55 return 0; 56 } 57 58 void bnxt_set_ulp_msix_num(struct bnxt *bp, int num) 59 { 60 if (bp->edev) 61 bp->edev->ulp_num_msix_vec = num; 62 } 63 64 int bnxt_get_ulp_msix_num_in_use(struct bnxt *bp) 65 { 66 if (bnxt_ulp_registered(bp->edev)) 67 return bp->edev->ulp_num_msix_vec; 68 return 0; 69 } 70 71 int bnxt_get_ulp_stat_ctxs(struct bnxt *bp) 72 { 73 if (bp->edev) 74 return bp->edev->ulp_num_ctxs; 75 return 0; 76 } 77 78 void bnxt_set_ulp_stat_ctxs(struct bnxt *bp, int num_ulp_ctx) 79 { 80 if (bp->edev) 81 bp->edev->ulp_num_ctxs = num_ulp_ctx; 82 } 83 84 int bnxt_get_ulp_stat_ctxs_in_use(struct bnxt *bp) 85 { 86 if (bnxt_ulp_registered(bp->edev)) 87 return bp->edev->ulp_num_ctxs; 88 return 0; 89 } 90 91 void bnxt_set_dflt_ulp_stat_ctxs(struct bnxt *bp) 92 { 93 if (bp->edev) { 94 bp->edev->ulp_num_ctxs = BNXT_MIN_ROCE_STAT_CTXS; 95 /* Reserve one additional stat_ctx for PF0 (except 96 * on 1-port NICs) as it also creates one stat_ctx 97 * for PF1 in case of RoCE bonding. 98 */ 99 if (BNXT_PF(bp) && !bp->pf.port_id && 100 bp->port_count > 1) 101 bp->edev->ulp_num_ctxs++; 102 } 103 } 104 105 int bnxt_register_dev(struct bnxt_en_dev *edev, 106 struct bnxt_ulp_ops *ulp_ops, 107 void *handle) 108 { 109 struct net_device *dev = edev->net; 110 struct bnxt *bp = netdev_priv(dev); 111 unsigned int max_stat_ctxs; 112 struct bnxt_ulp *ulp; 113 int rc = 0; 114 115 rtnl_lock(); 116 mutex_lock(&edev->en_dev_lock); 117 if (!bp->irq_tbl) { 118 rc = -ENODEV; 119 goto exit; 120 } 121 max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp); 122 if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS || 123 bp->cp_nr_rings == max_stat_ctxs) { 124 rc = -ENOMEM; 125 goto exit; 126 } 127 128 ulp = edev->ulp_tbl; 129 ulp->handle = handle; 130 rcu_assign_pointer(ulp->ulp_ops, ulp_ops); 131 132 if (test_bit(BNXT_STATE_OPEN, &bp->state)) 133 bnxt_hwrm_vnic_cfg(bp, &bp->vnic_info[BNXT_VNIC_DEFAULT]); 134 135 edev->ulp_tbl->msix_requested = bnxt_get_ulp_msix_num(bp); 136 137 bnxt_fill_msix_vecs(bp, bp->edev->msix_entries); 138 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED; 139 exit: 140 mutex_unlock(&edev->en_dev_lock); 141 rtnl_unlock(); 142 return rc; 143 } 144 EXPORT_SYMBOL(bnxt_register_dev); 145 146 void bnxt_unregister_dev(struct bnxt_en_dev *edev) 147 { 148 struct net_device *dev = edev->net; 149 struct bnxt *bp = netdev_priv(dev); 150 struct bnxt_ulp *ulp; 151 int i = 0; 152 153 ulp = edev->ulp_tbl; 154 rtnl_lock(); 155 mutex_lock(&edev->en_dev_lock); 156 if (ulp->msix_requested) 157 edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED; 158 edev->ulp_tbl->msix_requested = 0; 159 160 if (ulp->max_async_event_id) 161 bnxt_hwrm_func_drv_rgtr(bp, NULL, 0, true); 162 163 RCU_INIT_POINTER(ulp->ulp_ops, NULL); 164 synchronize_rcu(); 165 ulp->max_async_event_id = 0; 166 ulp->async_events_bmap = NULL; 167 while (atomic_read(&ulp->ref_count) != 0 && i < 10) { 168 msleep(100); 169 i++; 170 } 171 mutex_unlock(&edev->en_dev_lock); 172 rtnl_unlock(); 173 return; 174 } 175 EXPORT_SYMBOL(bnxt_unregister_dev); 176 177 static int bnxt_set_dflt_ulp_msix(struct bnxt *bp) 178 { 179 u32 roce_msix = BNXT_VF(bp) ? 180 BNXT_MAX_VF_ROCE_MSIX : BNXT_MAX_ROCE_MSIX; 181 182 return ((bp->flags & BNXT_FLAG_ROCE_CAP) ? 183 min_t(u32, roce_msix, num_online_cpus()) : 0); 184 } 185 186 int bnxt_send_msg(struct bnxt_en_dev *edev, 187 struct bnxt_fw_msg *fw_msg) 188 { 189 struct net_device *dev = edev->net; 190 struct bnxt *bp = netdev_priv(dev); 191 struct output *resp; 192 struct input *req; 193 u32 resp_len; 194 int rc; 195 196 if (bp->fw_reset_state) 197 return -EBUSY; 198 199 rc = hwrm_req_init(bp, req, 0 /* don't care */); 200 if (rc) 201 return rc; 202 203 rc = hwrm_req_replace(bp, req, fw_msg->msg, fw_msg->msg_len); 204 if (rc) 205 return rc; 206 207 hwrm_req_timeout(bp, req, fw_msg->timeout); 208 resp = hwrm_req_hold(bp, req); 209 rc = hwrm_req_send(bp, req); 210 resp_len = le16_to_cpu(resp->resp_len); 211 if (resp_len) { 212 if (fw_msg->resp_max_len < resp_len) 213 resp_len = fw_msg->resp_max_len; 214 215 memcpy(fw_msg->resp, resp, resp_len); 216 } 217 hwrm_req_drop(bp, req); 218 return rc; 219 } 220 EXPORT_SYMBOL(bnxt_send_msg); 221 222 void bnxt_ulp_stop(struct bnxt *bp) 223 { 224 struct bnxt_aux_priv *aux_priv = bp->aux_priv; 225 struct bnxt_en_dev *edev = bp->edev; 226 227 if (!edev) 228 return; 229 230 mutex_lock(&edev->en_dev_lock); 231 if (!bnxt_ulp_registered(edev)) { 232 mutex_unlock(&edev->en_dev_lock); 233 return; 234 } 235 236 edev->flags |= BNXT_EN_FLAG_ULP_STOPPED; 237 if (aux_priv) { 238 struct auxiliary_device *adev; 239 240 adev = &aux_priv->aux_dev; 241 if (adev->dev.driver) { 242 const struct auxiliary_driver *adrv; 243 pm_message_t pm = {}; 244 245 adrv = to_auxiliary_drv(adev->dev.driver); 246 edev->en_state = bp->state; 247 adrv->suspend(adev, pm); 248 } 249 } 250 mutex_unlock(&edev->en_dev_lock); 251 } 252 253 void bnxt_ulp_start(struct bnxt *bp, int err) 254 { 255 struct bnxt_aux_priv *aux_priv = bp->aux_priv; 256 struct bnxt_en_dev *edev = bp->edev; 257 258 if (!edev) 259 return; 260 261 edev->flags &= ~BNXT_EN_FLAG_ULP_STOPPED; 262 263 if (err) 264 return; 265 266 mutex_lock(&edev->en_dev_lock); 267 if (!bnxt_ulp_registered(edev)) { 268 mutex_unlock(&edev->en_dev_lock); 269 return; 270 } 271 272 if (edev->ulp_tbl->msix_requested) 273 bnxt_fill_msix_vecs(bp, edev->msix_entries); 274 275 if (aux_priv) { 276 struct auxiliary_device *adev; 277 278 adev = &aux_priv->aux_dev; 279 if (adev->dev.driver) { 280 const struct auxiliary_driver *adrv; 281 282 adrv = to_auxiliary_drv(adev->dev.driver); 283 edev->en_state = bp->state; 284 adrv->resume(adev); 285 } 286 } 287 mutex_unlock(&edev->en_dev_lock); 288 } 289 290 void bnxt_ulp_irq_stop(struct bnxt *bp) 291 { 292 struct bnxt_en_dev *edev = bp->edev; 293 struct bnxt_ulp_ops *ops; 294 295 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED)) 296 return; 297 298 if (bnxt_ulp_registered(bp->edev)) { 299 struct bnxt_ulp *ulp = edev->ulp_tbl; 300 301 if (!ulp->msix_requested) 302 return; 303 304 ops = rtnl_dereference(ulp->ulp_ops); 305 if (!ops || !ops->ulp_irq_stop) 306 return; 307 ops->ulp_irq_stop(ulp->handle); 308 } 309 } 310 311 void bnxt_ulp_irq_restart(struct bnxt *bp, int err) 312 { 313 struct bnxt_en_dev *edev = bp->edev; 314 struct bnxt_ulp_ops *ops; 315 316 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED)) 317 return; 318 319 if (bnxt_ulp_registered(bp->edev)) { 320 struct bnxt_ulp *ulp = edev->ulp_tbl; 321 struct bnxt_msix_entry *ent = NULL; 322 323 if (!ulp->msix_requested) 324 return; 325 326 ops = rtnl_dereference(ulp->ulp_ops); 327 if (!ops || !ops->ulp_irq_restart) 328 return; 329 330 if (!err) { 331 ent = kcalloc(ulp->msix_requested, sizeof(*ent), 332 GFP_KERNEL); 333 if (!ent) 334 return; 335 bnxt_fill_msix_vecs(bp, ent); 336 } 337 ops->ulp_irq_restart(ulp->handle, ent); 338 kfree(ent); 339 } 340 } 341 342 int bnxt_register_async_events(struct bnxt_en_dev *edev, 343 unsigned long *events_bmap, 344 u16 max_id) 345 { 346 struct net_device *dev = edev->net; 347 struct bnxt *bp = netdev_priv(dev); 348 struct bnxt_ulp *ulp; 349 350 ulp = edev->ulp_tbl; 351 ulp->async_events_bmap = events_bmap; 352 /* Make sure bnxt_ulp_async_events() sees this order */ 353 smp_wmb(); 354 ulp->max_async_event_id = max_id; 355 bnxt_hwrm_func_drv_rgtr(bp, events_bmap, max_id + 1, true); 356 return 0; 357 } 358 EXPORT_SYMBOL(bnxt_register_async_events); 359 360 void bnxt_rdma_aux_device_uninit(struct bnxt *bp) 361 { 362 struct bnxt_aux_priv *aux_priv; 363 struct auxiliary_device *adev; 364 365 /* Skip if no auxiliary device init was done. */ 366 if (!bp->aux_priv) 367 return; 368 369 aux_priv = bp->aux_priv; 370 adev = &aux_priv->aux_dev; 371 auxiliary_device_uninit(adev); 372 } 373 374 static void bnxt_aux_dev_release(struct device *dev) 375 { 376 struct bnxt_aux_priv *aux_priv = 377 container_of(dev, struct bnxt_aux_priv, aux_dev.dev); 378 struct bnxt *bp = netdev_priv(aux_priv->edev->net); 379 380 ida_free(&bnxt_aux_dev_ids, aux_priv->id); 381 kfree(aux_priv->edev->ulp_tbl); 382 bp->edev = NULL; 383 kfree(aux_priv->edev); 384 kfree(aux_priv); 385 bp->aux_priv = NULL; 386 } 387 388 void bnxt_rdma_aux_device_del(struct bnxt *bp) 389 { 390 if (!bp->edev) 391 return; 392 393 auxiliary_device_delete(&bp->aux_priv->aux_dev); 394 } 395 396 static void bnxt_set_edev_info(struct bnxt_en_dev *edev, struct bnxt *bp) 397 { 398 edev->net = bp->dev; 399 edev->pdev = bp->pdev; 400 edev->l2_db_size = bp->db_size; 401 edev->l2_db_size_nc = bp->db_size; 402 edev->l2_db_offset = bp->db_offset; 403 mutex_init(&edev->en_dev_lock); 404 405 if (bp->flags & BNXT_FLAG_ROCEV1_CAP) 406 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP; 407 if (bp->flags & BNXT_FLAG_ROCEV2_CAP) 408 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP; 409 if (bp->flags & BNXT_FLAG_VF) 410 edev->flags |= BNXT_EN_FLAG_VF; 411 412 edev->chip_num = bp->chip_num; 413 edev->hw_ring_stats_size = bp->hw_ring_stats_size; 414 edev->pf_port_id = bp->pf.port_id; 415 edev->en_state = bp->state; 416 edev->bar0 = bp->bar0; 417 } 418 419 void bnxt_rdma_aux_device_add(struct bnxt *bp) 420 { 421 struct auxiliary_device *aux_dev; 422 int rc; 423 424 if (!bp->edev) 425 return; 426 427 aux_dev = &bp->aux_priv->aux_dev; 428 rc = auxiliary_device_add(aux_dev); 429 if (rc) { 430 netdev_warn(bp->dev, "Failed to add auxiliary device for ROCE\n"); 431 auxiliary_device_uninit(aux_dev); 432 bp->flags &= ~BNXT_FLAG_ROCE_CAP; 433 } 434 } 435 436 void bnxt_rdma_aux_device_init(struct bnxt *bp) 437 { 438 struct auxiliary_device *aux_dev; 439 struct bnxt_aux_priv *aux_priv; 440 struct bnxt_en_dev *edev; 441 struct bnxt_ulp *ulp; 442 int rc; 443 444 if (!(bp->flags & BNXT_FLAG_ROCE_CAP)) 445 return; 446 447 aux_priv = kzalloc(sizeof(*bp->aux_priv), GFP_KERNEL); 448 if (!aux_priv) 449 goto exit; 450 451 aux_priv->id = ida_alloc(&bnxt_aux_dev_ids, GFP_KERNEL); 452 if (aux_priv->id < 0) { 453 netdev_warn(bp->dev, 454 "ida alloc failed for ROCE auxiliary device\n"); 455 kfree(aux_priv); 456 goto exit; 457 } 458 459 aux_dev = &aux_priv->aux_dev; 460 aux_dev->id = aux_priv->id; 461 aux_dev->name = "rdma"; 462 aux_dev->dev.parent = &bp->pdev->dev; 463 aux_dev->dev.release = bnxt_aux_dev_release; 464 465 rc = auxiliary_device_init(aux_dev); 466 if (rc) { 467 ida_free(&bnxt_aux_dev_ids, aux_priv->id); 468 kfree(aux_priv); 469 goto exit; 470 } 471 bp->aux_priv = aux_priv; 472 473 /* From this point, all cleanup will happen via the .release callback & 474 * any error unwinding will need to include a call to 475 * auxiliary_device_uninit. 476 */ 477 edev = kzalloc(sizeof(*edev), GFP_KERNEL); 478 if (!edev) 479 goto aux_dev_uninit; 480 481 aux_priv->edev = edev; 482 483 ulp = kzalloc(sizeof(*ulp), GFP_KERNEL); 484 if (!ulp) 485 goto aux_dev_uninit; 486 487 edev->ulp_tbl = ulp; 488 bp->edev = edev; 489 bnxt_set_edev_info(edev, bp); 490 bp->ulp_num_msix_want = bnxt_set_dflt_ulp_msix(bp); 491 492 return; 493 494 aux_dev_uninit: 495 auxiliary_device_uninit(aux_dev); 496 exit: 497 bp->flags &= ~BNXT_FLAG_ROCE_CAP; 498 } 499