drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/interrupt.h>
  69 #include <net/net_namespace.h>
  70 #include <asm/hvcall.h>
  71 #include <linux/atomic.h>
  72 #include <asm/vio.h>
  73 #include <asm/iommu.h>
  74 #include <linux/uaccess.h>
  75 #include <asm/firmware.h>
  76 #include <linux/workqueue.h>
  77 #include <linux/if_vlan.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  97                        union sub_crq *sub_crq);
  98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 100 static int enable_scrq_irq(struct ibmvnic_adapter *,
 101                            struct ibmvnic_sub_crq_queue *);
 102 static int disable_scrq_irq(struct ibmvnic_adapter *,
 103                             struct ibmvnic_sub_crq_queue *);
 104 static int pending_scrq(struct ibmvnic_adapter *,
 105                         struct ibmvnic_sub_crq_queue *);
 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 107                                         struct ibmvnic_sub_crq_queue *);
 108 static int ibmvnic_poll(struct napi_struct *napi, int data);
 109 static void send_map_query(struct ibmvnic_adapter *adapter);
 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 112 static void send_login(struct ibmvnic_adapter *adapter);
 113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 114 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 115 static int ibmvnic_init(struct ibmvnic_adapter *);
 116 static void release_crq_queue(struct ibmvnic_adapter *);
 117
 118 struct ibmvnic_stat {
 119         char name[ETH_GSTRING_LEN];
 120         int offset;
 121 };
 122
 123 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 124                              offsetof(struct ibmvnic_statistics, stat))
 125 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 126
 127 static const struct ibmvnic_stat ibmvnic_stats[] = {
 128         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 129         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 130         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 131         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 132         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 133         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 134         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 135         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 136         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 137         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 138         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 139         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 140         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 141         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 142         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 143         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 144         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 145         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 146         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 147         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 148         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 149         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 150 };
 151
 152 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 153                           unsigned long length, unsigned long *number,
 154                           unsigned long *irq)
 155 {
 156         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 157         long rc;
 158
 159         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 160         *number = retbuf[0];
 161         *irq = retbuf[1];
 162
 163         return rc;
 164 }
 165
 166 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 167                                 struct ibmvnic_long_term_buff *ltb, int size)
 168 {
 169         struct device *dev = &adapter->vdev->dev;
 170
 171         ltb->size = size;
 172         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 173                                        GFP_KERNEL);
 174
 175         if (!ltb->buff) {
 176                 dev_err(dev, "Couldn't alloc long term buffer\n");
 177                 return -ENOMEM;
 178         }
 179         ltb->map_id = adapter->map_id;
 180         adapter->map_id++;
 181
 182         init_completion(&adapter->fw_done);
 183         send_request_map(adapter, ltb->addr,
 184                          ltb->size, ltb->map_id);
 185         wait_for_completion(&adapter->fw_done);
 186         return 0;
 187 }
 188
 189 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 190                                 struct ibmvnic_long_term_buff *ltb)
 191 {
 192         struct device *dev = &adapter->vdev->dev;
 193
 194         if (!ltb->buff)
 195                 return;
 196
 197         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 198             adapter->reset_reason != VNIC_RESET_MOBILITY)
 199                 send_request_unmap(adapter, ltb->map_id);
 200         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 201 }
 202
 203 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 204                               struct ibmvnic_rx_pool *pool)
 205 {
 206         int count = pool->size - atomic_read(&pool->available);
 207         struct device *dev = &adapter->vdev->dev;
 208         int buffers_added = 0;
 209         unsigned long lpar_rc;
 210         union sub_crq sub_crq;
 211         struct sk_buff *skb;
 212         unsigned int offset;
 213         dma_addr_t dma_addr;
 214         unsigned char *dst;
 215         u64 *handle_array;
 216         int shift = 0;
 217         int index;
 218         int i;
 219
 220         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 221                                       be32_to_cpu(adapter->login_rsp_buf->
 222                                       off_rxadd_subcrqs));
 223
 224         for (i = 0; i < count; ++i) {
 225                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 226                 if (!skb) {
 227                         dev_err(dev, "Couldn't replenish rx buff\n");
 228                         adapter->replenish_no_mem++;
 229                         break;
 230                 }
 231
 232                 index = pool->free_map[pool->next_free];
 233
 234                 if (pool->rx_buff[index].skb)
 235                         dev_err(dev, "Inconsistent free_map!\n");
 236
 237                 /* Copy the skb to the long term mapped DMA buffer */
 238                 offset = index * pool->buff_size;
 239                 dst = pool->long_term_buff.buff + offset;
 240                 memset(dst, 0, pool->buff_size);
 241                 dma_addr = pool->long_term_buff.addr + offset;
 242                 pool->rx_buff[index].data = dst;
 243
 244                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 245                 pool->rx_buff[index].dma = dma_addr;
 246                 pool->rx_buff[index].skb = skb;
 247                 pool->rx_buff[index].pool_index = pool->index;
 248                 pool->rx_buff[index].size = pool->buff_size;
 249
 250                 memset(&sub_crq, 0, sizeof(sub_crq));
 251                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 252                 sub_crq.rx_add.correlator =
 253                     cpu_to_be64((u64)&pool->rx_buff[index]);
 254                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 255                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 256
 257                 /* The length field of the sCRQ is defined to be 24 bits so the
 258                  * buffer size needs to be left shifted by a byte before it is
 259                  * converted to big endian to prevent the last byte from being
 260                  * truncated.
 261                  */
 262 #ifdef __LITTLE_ENDIAN__
 263                 shift = 8;
 264 #endif
 265                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 266
 267                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 268                                       &sub_crq);
 269                 if (lpar_rc != H_SUCCESS)
 270                         goto failure;
 271
 272                 buffers_added++;
 273                 adapter->replenish_add_buff_success++;
 274                 pool->next_free = (pool->next_free + 1) % pool->size;
 275         }
 276         atomic_add(buffers_added, &pool->available);
 277         return;
 278
 279 failure:
 280         dev_info(dev, "replenish pools failure\n");
 281         pool->free_map[pool->next_free] = index;
 282         pool->rx_buff[index].skb = NULL;
 283         if (!dma_mapping_error(dev, dma_addr))
 284                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 285                                  DMA_FROM_DEVICE);
 286
 287         dev_kfree_skb_any(skb);
 288         adapter->replenish_add_buff_failure++;
 289         atomic_add(buffers_added, &pool->available);
 290 }
 291
 292 static void replenish_pools(struct ibmvnic_adapter *adapter)
 293 {
 294         int i;
 295
 296         adapter->replenish_task_cycles++;
 297         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 298              i++) {
 299                 if (adapter->rx_pool[i].active)
 300                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 301         }
 302 }
 303
 304 static void release_stats_token(struct ibmvnic_adapter *adapter)
 305 {
 306         struct device *dev = &adapter->vdev->dev;
 307
 308         if (!adapter->stats_token)
 309                 return;
 310
 311         dma_unmap_single(dev, adapter->stats_token,
 312                          sizeof(struct ibmvnic_statistics),
 313                          DMA_FROM_DEVICE);
 314         adapter->stats_token = 0;
 315 }
 316
 317 static int init_stats_token(struct ibmvnic_adapter *adapter)
 318 {
 319         struct device *dev = &adapter->vdev->dev;
 320         dma_addr_t stok;
 321
 322         stok = dma_map_single(dev, &adapter->stats,
 323                               sizeof(struct ibmvnic_statistics),
 324                               DMA_FROM_DEVICE);
 325         if (dma_mapping_error(dev, stok)) {
 326                 dev_err(dev, "Couldn't map stats buffer\n");
 327                 return -1;
 328         }
 329
 330         adapter->stats_token = stok;
 331         return 0;
 332 }
 333
 334 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 335 {
 336         struct ibmvnic_rx_pool *rx_pool;
 337         int rx_scrqs;
 338         int i, j;
 339
 340         if (!adapter->rx_pool)
 341                 return;
 342
 343         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 344         for (i = 0; i < rx_scrqs; i++) {
 345                 rx_pool = &adapter->rx_pool[i];
 346
 347                 kfree(rx_pool->free_map);
 348                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 349
 350                 if (!rx_pool->rx_buff)
 351                         continue;
 352
 353                 for (j = 0; j < rx_pool->size; j++) {
 354                         if (rx_pool->rx_buff[j].skb) {
 355                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 356                                 rx_pool->rx_buff[i].skb = NULL;
 357                         }
 358                 }
 359
 360                 kfree(rx_pool->rx_buff);
 361         }
 362
 363         kfree(adapter->rx_pool);
 364         adapter->rx_pool = NULL;
 365 }
 366
 367 static int init_rx_pools(struct net_device *netdev)
 368 {
 369         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 370         struct device *dev = &adapter->vdev->dev;
 371         struct ibmvnic_rx_pool *rx_pool;
 372         int rxadd_subcrqs;
 373         u64 *size_array;
 374         int i, j;
 375
 376         rxadd_subcrqs =
 377                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 378         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 379                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 380
 381         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 382                                    sizeof(struct ibmvnic_rx_pool),
 383                                    GFP_KERNEL);
 384         if (!adapter->rx_pool) {
 385                 dev_err(dev, "Failed to allocate rx pools\n");
 386                 return -1;
 387         }
 388
 389         for (i = 0; i < rxadd_subcrqs; i++) {
 390                 rx_pool = &adapter->rx_pool[i];
 391
 392                 netdev_dbg(adapter->netdev,
 393                            "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
 394                            i, adapter->req_rx_add_entries_per_subcrq,
 395                            be64_to_cpu(size_array[i]));
 396
 397                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 398                 rx_pool->index = i;
 399                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 400                 rx_pool->active = 1;
 401
 402                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 403                                             GFP_KERNEL);
 404                 if (!rx_pool->free_map) {
 405                         release_rx_pools(adapter);
 406                         return -1;
 407                 }
 408
 409                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 410                                            sizeof(struct ibmvnic_rx_buff),
 411                                            GFP_KERNEL);
 412                 if (!rx_pool->rx_buff) {
 413                         dev_err(dev, "Couldn't alloc rx buffers\n");
 414                         release_rx_pools(adapter);
 415                         return -1;
 416                 }
 417
 418                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 419                                          rx_pool->size * rx_pool->buff_size)) {
 420                         release_rx_pools(adapter);
 421                         return -1;
 422                 }
 423
 424                 for (j = 0; j < rx_pool->size; ++j)
 425                         rx_pool->free_map[j] = j;
 426
 427                 atomic_set(&rx_pool->available, 0);
 428                 rx_pool->next_alloc = 0;
 429                 rx_pool->next_free = 0;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 436 {
 437         struct ibmvnic_tx_pool *tx_pool;
 438         int i, tx_scrqs;
 439
 440         if (!adapter->tx_pool)
 441                 return;
 442
 443         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 444         for (i = 0; i < tx_scrqs; i++) {
 445                 tx_pool = &adapter->tx_pool[i];
 446                 kfree(tx_pool->tx_buff);
 447                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 448                 kfree(tx_pool->free_map);
 449         }
 450
 451         kfree(adapter->tx_pool);
 452         adapter->tx_pool = NULL;
 453 }
 454
 455 static int init_tx_pools(struct net_device *netdev)
 456 {
 457         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 458         struct device *dev = &adapter->vdev->dev;
 459         struct ibmvnic_tx_pool *tx_pool;
 460         int tx_subcrqs;
 461         int i, j;
 462
 463         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 464         adapter->tx_pool = kcalloc(tx_subcrqs,
 465                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 466         if (!adapter->tx_pool)
 467                 return -1;
 468
 469         for (i = 0; i < tx_subcrqs; i++) {
 470                 tx_pool = &adapter->tx_pool[i];
 471                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 472                                            sizeof(struct ibmvnic_tx_buff),
 473                                            GFP_KERNEL);
 474                 if (!tx_pool->tx_buff) {
 475                         dev_err(dev, "tx pool buffer allocation failed\n");
 476                         release_tx_pools(adapter);
 477                         return -1;
 478                 }
 479
 480                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 481                                          adapter->req_tx_entries_per_subcrq *
 482                                          adapter->req_mtu)) {
 483                         release_tx_pools(adapter);
 484                         return -1;
 485                 }
 486
 487                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 488                                             sizeof(int), GFP_KERNEL);
 489                 if (!tx_pool->free_map) {
 490                         release_tx_pools(adapter);
 491                         return -1;
 492                 }
 493
 494                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 495                         tx_pool->free_map[j] = j;
 496
 497                 tx_pool->consumer_index = 0;
 498                 tx_pool->producer_index = 0;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 505 {
 506         struct device *dev = &adapter->vdev->dev;
 507         struct ibmvnic_error_buff *error_buff, *tmp;
 508         unsigned long flags;
 509
 510         spin_lock_irqsave(&adapter->error_list_lock, flags);
 511         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 512                 list_del(&error_buff->list);
 513                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 514                                  DMA_FROM_DEVICE);
 515                 kfree(error_buff->buff);
 516                 kfree(error_buff);
 517         }
 518         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 519 }
 520
 521 static int ibmvnic_login(struct net_device *netdev)
 522 {
 523         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 524         unsigned long timeout = msecs_to_jiffies(30000);
 525         struct device *dev = &adapter->vdev->dev;
 526
 527         do {
 528                 if (adapter->renegotiate) {
 529                         adapter->renegotiate = false;
 530                         release_sub_crqs(adapter);
 531
 532                         reinit_completion(&adapter->init_done);
 533                         send_cap_queries(adapter);
 534                         if (!wait_for_completion_timeout(&adapter->init_done,
 535                                                          timeout)) {
 536                                 dev_err(dev, "Capabilities query timeout\n");
 537                                 return -1;
 538                         }
 539                 }
 540
 541                 reinit_completion(&adapter->init_done);
 542                 send_login(adapter);
 543                 if (!wait_for_completion_timeout(&adapter->init_done,
 544                                                  timeout)) {
 545                         dev_err(dev, "Login timeout\n");
 546                         return -1;
 547                 }
 548         } while (adapter->renegotiate);
 549
 550         return 0;
 551 }
 552
 553 static void release_resources(struct ibmvnic_adapter *adapter)
 554 {
 555         int i;
 556
 557         release_tx_pools(adapter);
 558         release_rx_pools(adapter);
 559
 560         release_stats_token(adapter);
 561         release_error_buffers(adapter);
 562
 563         if (adapter->napi) {
 564                 for (i = 0; i < adapter->req_rx_queues; i++) {
 565                         if (&adapter->napi[i])
 566                                 netif_napi_del(&adapter->napi[i]);
 567                 }
 568         }
 569 }
 570
 571 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 572 {
 573         struct net_device *netdev = adapter->netdev;
 574         unsigned long timeout = msecs_to_jiffies(30000);
 575         union ibmvnic_crq crq;
 576         bool resend;
 577         int rc;
 578
 579         netdev_err(netdev, "setting link state %d\n", link_state);
 580         memset(&crq, 0, sizeof(crq));
 581         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 582         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 583         crq.logical_link_state.link_state = link_state;
 584
 585         do {
 586                 resend = false;
 587
 588                 reinit_completion(&adapter->init_done);
 589                 rc = ibmvnic_send_crq(adapter, &crq);
 590                 if (rc) {
 591                         netdev_err(netdev, "Failed to set link state\n");
 592                         return rc;
 593                 }
 594
 595                 if (!wait_for_completion_timeout(&adapter->init_done,
 596                                                  timeout)) {
 597                         netdev_err(netdev, "timeout setting link state\n");
 598                         return -1;
 599                 }
 600
 601                 if (adapter->init_done_rc == 1) {
 602                         /* Partuial success, delay and re-send */
 603                         mdelay(1000);
 604                         resend = true;
 605                 }
 606         } while (resend);
 607
 608         return 0;
 609 }
 610
 611 static int set_real_num_queues(struct net_device *netdev)
 612 {
 613         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 614         int rc;
 615
 616         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 617         if (rc) {
 618                 netdev_err(netdev, "failed to set the number of tx queues\n");
 619                 return rc;
 620         }
 621
 622         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 623         if (rc)
 624                 netdev_err(netdev, "failed to set the number of rx queues\n");
 625
 626         return rc;
 627 }
 628
 629 static int init_resources(struct ibmvnic_adapter *adapter)
 630 {
 631         struct net_device *netdev = adapter->netdev;
 632         int i, rc;
 633
 634         rc = set_real_num_queues(netdev);
 635         if (rc)
 636                 return rc;
 637
 638         rc = init_sub_crq_irqs(adapter);
 639         if (rc) {
 640                 netdev_err(netdev, "failed to initialize sub crq irqs\n");
 641                 return -1;
 642         }
 643
 644         rc = init_stats_token(adapter);
 645         if (rc)
 646                 return rc;
 647
 648         adapter->map_id = 1;
 649         adapter->napi = kcalloc(adapter->req_rx_queues,
 650                                 sizeof(struct napi_struct), GFP_KERNEL);
 651         if (!adapter->napi)
 652                 return -ENOMEM;
 653
 654         for (i = 0; i < adapter->req_rx_queues; i++) {
 655                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 656                                NAPI_POLL_WEIGHT);
 657         }
 658
 659         send_map_query(adapter);
 660
 661         rc = init_rx_pools(netdev);
 662         if (rc)
 663                 return rc;
 664
 665         rc = init_tx_pools(netdev);
 666         return rc;
 667 }
 668
 669 static int __ibmvnic_open(struct net_device *netdev)
 670 {
 671         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 672         enum vnic_state prev_state = adapter->state;
 673         int i, rc;
 674
 675         adapter->state = VNIC_OPENING;
 676         replenish_pools(adapter);
 677
 678         for (i = 0; i < adapter->req_rx_queues; i++)
 679                 napi_enable(&adapter->napi[i]);
 680
 681         /* We're ready to receive frames, enable the sub-crq interrupts and
 682          * set the logical link state to up
 683          */
 684         for (i = 0; i < adapter->req_rx_queues; i++) {
 685                 if (prev_state == VNIC_CLOSED)
 686                         enable_irq(adapter->rx_scrq[i]->irq);
 687                 else
 688                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 689         }
 690
 691         for (i = 0; i < adapter->req_tx_queues; i++) {
 692                 if (prev_state == VNIC_CLOSED)
 693                         enable_irq(adapter->tx_scrq[i]->irq);
 694                 else
 695                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 696         }
 697
 698         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
 699         if (rc) {
 700                 for (i = 0; i < adapter->req_rx_queues; i++)
 701                         napi_disable(&adapter->napi[i]);
 702                 release_resources(adapter);
 703                 return rc;
 704         }
 705
 706         netif_tx_start_all_queues(netdev);
 707
 708         if (prev_state == VNIC_CLOSED) {
 709                 for (i = 0; i < adapter->req_rx_queues; i++)
 710                         napi_schedule(&adapter->napi[i]);
 711         }
 712
 713         adapter->state = VNIC_OPEN;
 714         return rc;
 715 }
 716
 717 static int ibmvnic_open(struct net_device *netdev)
 718 {
 719         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 720         int rc;
 721
 722         mutex_lock(&adapter->reset_lock);
 723
 724         if (adapter->state != VNIC_CLOSED) {
 725                 rc = ibmvnic_login(netdev);
 726                 if (rc) {
 727                         mutex_unlock(&adapter->reset_lock);
 728                         return rc;
 729                 }
 730
 731                 rc = init_resources(adapter);
 732                 if (rc) {
 733                         netdev_err(netdev, "failed to initialize resources\n");
 734                         release_resources(adapter);
 735                         mutex_unlock(&adapter->reset_lock);
 736                         return rc;
 737                 }
 738         }
 739
 740         rc = __ibmvnic_open(netdev);
 741         mutex_unlock(&adapter->reset_lock);
 742
 743         return rc;
 744 }
 745
 746 static void disable_sub_crqs(struct ibmvnic_adapter *adapter)
 747 {
 748         int i;
 749
 750         if (adapter->tx_scrq) {
 751                 for (i = 0; i < adapter->req_tx_queues; i++)
 752                         if (adapter->tx_scrq[i])
 753                                 disable_irq(adapter->tx_scrq[i]->irq);
 754         }
 755
 756         if (adapter->rx_scrq) {
 757                 for (i = 0; i < adapter->req_rx_queues; i++)
 758                         if (adapter->rx_scrq[i])
 759                                 disable_irq(adapter->rx_scrq[i]->irq);
 760         }
 761 }
 762
 763 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
 764 {
 765         struct ibmvnic_tx_pool *tx_pool;
 766         u64 tx_entries;
 767         int tx_scrqs;
 768         int i, j;
 769
 770         if (!adapter->tx_pool)
 771                 return;
 772
 773         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 774         tx_entries = adapter->req_tx_entries_per_subcrq;
 775
 776         /* Free any remaining skbs in the tx buffer pools */
 777         for (i = 0; i < tx_scrqs; i++) {
 778                 tx_pool = &adapter->tx_pool[i];
 779                 if (!tx_pool)
 780                         continue;
 781
 782                 for (j = 0; j < tx_entries; j++) {
 783                         if (tx_pool->tx_buff[j].skb) {
 784                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
 785                                 tx_pool->tx_buff[j].skb = NULL;
 786                         }
 787                 }
 788         }
 789 }
 790
 791 static int __ibmvnic_close(struct net_device *netdev)
 792 {
 793         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 794         int rc = 0;
 795         int i;
 796
 797         adapter->state = VNIC_CLOSING;
 798         netif_tx_stop_all_queues(netdev);
 799
 800         clean_tx_pools(adapter);
 801         disable_sub_crqs(adapter);
 802
 803         if (adapter->napi) {
 804                 for (i = 0; i < adapter->req_rx_queues; i++)
 805                         napi_disable(&adapter->napi[i]);
 806         }
 807
 808         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
 809
 810         adapter->state = VNIC_CLOSED;
 811         return rc;
 812 }
 813
 814 static int ibmvnic_close(struct net_device *netdev)
 815 {
 816         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 817         int rc;
 818
 819         mutex_lock(&adapter->reset_lock);
 820         rc = __ibmvnic_close(netdev);
 821         mutex_unlock(&adapter->reset_lock);
 822
 823         return rc;
 824 }
 825
 826 /**
 827  * build_hdr_data - creates L2/L3/L4 header data buffer
 828  * @hdr_field - bitfield determining needed headers
 829  * @skb - socket buffer
 830  * @hdr_len - array of header lengths
 831  * @tot_len - total length of data
 832  *
 833  * Reads hdr_field to determine which headers are needed by firmware.
 834  * Builds a buffer containing these headers.  Saves individual header
 835  * lengths and total buffer length to be used to build descriptors.
 836  */
 837 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 838                           int *hdr_len, u8 *hdr_data)
 839 {
 840         int len = 0;
 841         u8 *hdr;
 842
 843         hdr_len[0] = sizeof(struct ethhdr);
 844
 845         if (skb->protocol == htons(ETH_P_IP)) {
 846                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 847                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 848                         hdr_len[2] = tcp_hdrlen(skb);
 849                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 850                         hdr_len[2] = sizeof(struct udphdr);
 851         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 852                 hdr_len[1] = sizeof(struct ipv6hdr);
 853                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 854                         hdr_len[2] = tcp_hdrlen(skb);
 855                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 856                         hdr_len[2] = sizeof(struct udphdr);
 857         }
 858
 859         memset(hdr_data, 0, 120);
 860         if ((hdr_field >> 6) & 1) {
 861                 hdr = skb_mac_header(skb);
 862                 memcpy(hdr_data, hdr, hdr_len[0]);
 863                 len += hdr_len[0];
 864         }
 865
 866         if ((hdr_field >> 5) & 1) {
 867                 hdr = skb_network_header(skb);
 868                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 869                 len += hdr_len[1];
 870         }
 871
 872         if ((hdr_field >> 4) & 1) {
 873                 hdr = skb_transport_header(skb);
 874                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 875                 len += hdr_len[2];
 876         }
 877         return len;
 878 }
 879
 880 /**
 881  * create_hdr_descs - create header and header extension descriptors
 882  * @hdr_field - bitfield determining needed headers
 883  * @data - buffer containing header data
 884  * @len - length of data buffer
 885  * @hdr_len - array of individual header lengths
 886  * @scrq_arr - descriptor array
 887  *
 888  * Creates header and, if needed, header extension descriptors and
 889  * places them in a descriptor array, scrq_arr
 890  */
 891
 892 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 893                              union sub_crq *scrq_arr)
 894 {
 895         union sub_crq hdr_desc;
 896         int tmp_len = len;
 897         u8 *data, *cur;
 898         int tmp;
 899
 900         while (tmp_len > 0) {
 901                 cur = hdr_data + len - tmp_len;
 902
 903                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 904                 if (cur != hdr_data) {
 905                         data = hdr_desc.hdr_ext.data;
 906                         tmp = tmp_len > 29 ? 29 : tmp_len;
 907                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 908                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 909                         hdr_desc.hdr_ext.len = tmp;
 910                 } else {
 911                         data = hdr_desc.hdr.data;
 912                         tmp = tmp_len > 24 ? 24 : tmp_len;
 913                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 914                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 915                         hdr_desc.hdr.len = tmp;
 916                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 917                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 918                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 919                         hdr_desc.hdr.flag = hdr_field << 1;
 920                 }
 921                 memcpy(data, cur, tmp);
 922                 tmp_len -= tmp;
 923                 *scrq_arr = hdr_desc;
 924                 scrq_arr++;
 925         }
 926 }
 927
 928 /**
 929  * build_hdr_descs_arr - build a header descriptor array
 930  * @skb - socket buffer
 931  * @num_entries - number of descriptors to be sent
 932  * @subcrq - first TX descriptor
 933  * @hdr_field - bit field determining which headers will be sent
 934  *
 935  * This function will build a TX descriptor array with applicable
 936  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 937  */
 938
 939 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 940                                 int *num_entries, u8 hdr_field)
 941 {
 942         int hdr_len[3] = {0, 0, 0};
 943         int tot_len, len;
 944         u8 *hdr_data = txbuff->hdr_data;
 945
 946         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 947                                  txbuff->hdr_data);
 948         len = tot_len;
 949         len -= 24;
 950         if (len > 0)
 951                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 952         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 953                          txbuff->indir_arr + 1);
 954 }
 955
 956 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 957 {
 958         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 959         int queue_num = skb_get_queue_mapping(skb);
 960         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 961         struct device *dev = &adapter->vdev->dev;
 962         struct ibmvnic_tx_buff *tx_buff = NULL;
 963         struct ibmvnic_sub_crq_queue *tx_scrq;
 964         struct ibmvnic_tx_pool *tx_pool;
 965         unsigned int tx_send_failed = 0;
 966         unsigned int tx_map_failed = 0;
 967         unsigned int tx_dropped = 0;
 968         unsigned int tx_packets = 0;
 969         unsigned int tx_bytes = 0;
 970         dma_addr_t data_dma_addr;
 971         struct netdev_queue *txq;
 972         unsigned long lpar_rc;
 973         union sub_crq tx_crq;
 974         unsigned int offset;
 975         int num_entries = 1;
 976         unsigned char *dst;
 977         u64 *handle_array;
 978         int index = 0;
 979         int ret = 0;
 980
 981         tx_pool = &adapter->tx_pool[queue_num];
 982         tx_scrq = adapter->tx_scrq[queue_num];
 983         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 984         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 985                                    be32_to_cpu(adapter->login_rsp_buf->
 986                                                off_txsubm_subcrqs));
 987         if (adapter->resetting) {
 988                 if (!netif_subqueue_stopped(netdev, skb))
 989                         netif_stop_subqueue(netdev, queue_num);
 990                 dev_kfree_skb_any(skb);
 991
 992                 tx_send_failed++;
 993                 tx_dropped++;
 994                 ret = NETDEV_TX_OK;
 995                 goto out;
 996         }
 997
 998         index = tx_pool->free_map[tx_pool->consumer_index];
 999         offset = index * adapter->req_mtu;
1000         dst = tx_pool->long_term_buff.buff + offset;
1001         memset(dst, 0, adapter->req_mtu);
1002         skb_copy_from_linear_data(skb, dst, skb->len);
1003         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1004
1005         tx_pool->consumer_index =
1006             (tx_pool->consumer_index + 1) %
1007                 adapter->req_tx_entries_per_subcrq;
1008
1009         tx_buff = &tx_pool->tx_buff[index];
1010         tx_buff->skb = skb;
1011         tx_buff->data_dma[0] = data_dma_addr;
1012         tx_buff->data_len[0] = skb->len;
1013         tx_buff->index = index;
1014         tx_buff->pool_index = queue_num;
1015         tx_buff->last_frag = true;
1016
1017         memset(&tx_crq, 0, sizeof(tx_crq));
1018         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1019         tx_crq.v1.type = IBMVNIC_TX_DESC;
1020         tx_crq.v1.n_crq_elem = 1;
1021         tx_crq.v1.n_sge = 1;
1022         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1023         tx_crq.v1.correlator = cpu_to_be32(index);
1024         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1025         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1026         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1027
1028         if (adapter->vlan_header_insertion) {
1029                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1030                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1031         }
1032
1033         if (skb->protocol == htons(ETH_P_IP)) {
1034                 if (ip_hdr(skb)->version == 4)
1035                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1036                 else if (ip_hdr(skb)->version == 6)
1037                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1038
1039                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1040                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1041                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1042                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1043         }
1044
1045         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1046                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1047                 hdrs += 2;
1048         }
1049         /* determine if l2/3/4 headers are sent to firmware */
1050         if ((*hdrs >> 7) & 1 &&
1051             (skb->protocol == htons(ETH_P_IP) ||
1052              skb->protocol == htons(ETH_P_IPV6))) {
1053                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1054                 tx_crq.v1.n_crq_elem = num_entries;
1055                 tx_buff->indir_arr[0] = tx_crq;
1056                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1057                                                     sizeof(tx_buff->indir_arr),
1058                                                     DMA_TO_DEVICE);
1059                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1060                         dev_kfree_skb_any(skb);
1061                         tx_buff->skb = NULL;
1062                         if (!firmware_has_feature(FW_FEATURE_CMO))
1063                                 dev_err(dev, "tx: unable to map descriptor array\n");
1064                         tx_map_failed++;
1065                         tx_dropped++;
1066                         ret = NETDEV_TX_OK;
1067                         goto out;
1068                 }
1069                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1070                                                (u64)tx_buff->indir_dma,
1071                                                (u64)num_entries);
1072         } else {
1073                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1074                                       &tx_crq);
1075         }
1076         if (lpar_rc != H_SUCCESS) {
1077                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1078
1079                 if (tx_pool->consumer_index == 0)
1080                         tx_pool->consumer_index =
1081                                 adapter->req_tx_entries_per_subcrq - 1;
1082                 else
1083                         tx_pool->consumer_index--;
1084
1085                 dev_kfree_skb_any(skb);
1086                 tx_buff->skb = NULL;
1087
1088                 if (lpar_rc == H_CLOSED)
1089                         netif_stop_subqueue(netdev, queue_num);
1090
1091                 tx_send_failed++;
1092                 tx_dropped++;
1093                 ret = NETDEV_TX_OK;
1094                 goto out;
1095         }
1096
1097         if (atomic_inc_return(&tx_scrq->used)
1098                                         >= adapter->req_tx_entries_per_subcrq) {
1099                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1100                 netif_stop_subqueue(netdev, queue_num);
1101         }
1102
1103         tx_packets++;
1104         tx_bytes += skb->len;
1105         txq->trans_start = jiffies;
1106         ret = NETDEV_TX_OK;
1107
1108 out:
1109         netdev->stats.tx_dropped += tx_dropped;
1110         netdev->stats.tx_bytes += tx_bytes;
1111         netdev->stats.tx_packets += tx_packets;
1112         adapter->tx_send_failed += tx_send_failed;
1113         adapter->tx_map_failed += tx_map_failed;
1114
1115         return ret;
1116 }
1117
1118 static void ibmvnic_set_multi(struct net_device *netdev)
1119 {
1120         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1121         struct netdev_hw_addr *ha;
1122         union ibmvnic_crq crq;
1123
1124         memset(&crq, 0, sizeof(crq));
1125         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1126         crq.request_capability.cmd = REQUEST_CAPABILITY;
1127
1128         if (netdev->flags & IFF_PROMISC) {
1129                 if (!adapter->promisc_supported)
1130                         return;
1131         } else {
1132                 if (netdev->flags & IFF_ALLMULTI) {
1133                         /* Accept all multicast */
1134                         memset(&crq, 0, sizeof(crq));
1135                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1136                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1137                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1138                         ibmvnic_send_crq(adapter, &crq);
1139                 } else if (netdev_mc_empty(netdev)) {
1140                         /* Reject all multicast */
1141                         memset(&crq, 0, sizeof(crq));
1142                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1143                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1144                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1145                         ibmvnic_send_crq(adapter, &crq);
1146                 } else {
1147                         /* Accept one or more multicast(s) */
1148                         netdev_for_each_mc_addr(ha, netdev) {
1149                                 memset(&crq, 0, sizeof(crq));
1150                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1151                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1152                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1153                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1154                                                 ha->addr);
1155                                 ibmvnic_send_crq(adapter, &crq);
1156                         }
1157                 }
1158         }
1159 }
1160
1161 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1162 {
1163         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1164         struct sockaddr *addr = p;
1165         union ibmvnic_crq crq;
1166
1167         if (!is_valid_ether_addr(addr->sa_data))
1168                 return -EADDRNOTAVAIL;
1169
1170         memset(&crq, 0, sizeof(crq));
1171         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1172         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1173         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1174         ibmvnic_send_crq(adapter, &crq);
1175         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1176         return 0;
1177 }
1178
1179 /**
1180  * do_reset returns zero if we are able to keep processing reset events, or
1181  * non-zero if we hit a fatal error and must halt.
1182  */
1183 static int do_reset(struct ibmvnic_adapter *adapter,
1184                     struct ibmvnic_rwi *rwi, u32 reset_state)
1185 {
1186         struct net_device *netdev = adapter->netdev;
1187         int i, rc;
1188
1189         netif_carrier_off(netdev);
1190         adapter->reset_reason = rwi->reset_reason;
1191
1192         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1193                 rc = ibmvnic_reenable_crq_queue(adapter);
1194                 if (rc)
1195                         return 0;
1196         }
1197
1198         rc = __ibmvnic_close(netdev);
1199         if (rc)
1200                 return rc;
1201
1202         /* remove the closed state so when we call open it appears
1203          * we are coming from the probed state.
1204          */
1205         adapter->state = VNIC_PROBED;
1206
1207         release_resources(adapter);
1208         release_sub_crqs(adapter);
1209         release_crq_queue(adapter);
1210
1211         rc = ibmvnic_init(adapter);
1212         if (rc)
1213                 return 0;
1214
1215         /* If the adapter was in PROBE state prior to the reset, exit here. */
1216         if (reset_state == VNIC_PROBED)
1217                 return 0;
1218
1219         rc = ibmvnic_login(netdev);
1220         if (rc) {
1221                 adapter->state = VNIC_PROBED;
1222                 return 0;
1223         }
1224
1225         rtnl_lock();
1226         rc = init_resources(adapter);
1227         rtnl_unlock();
1228         if (rc)
1229                 return rc;
1230
1231         if (reset_state == VNIC_CLOSED)
1232                 return 0;
1233
1234         rc = __ibmvnic_open(netdev);
1235         if (rc) {
1236                 if (list_empty(&adapter->rwi_list))
1237                         adapter->state = VNIC_CLOSED;
1238                 else
1239                         adapter->state = reset_state;
1240
1241                 return 0;
1242         }
1243
1244         netif_carrier_on(netdev);
1245
1246         /* kick napi */
1247         for (i = 0; i < adapter->req_rx_queues; i++)
1248                 napi_schedule(&adapter->napi[i]);
1249
1250         return 0;
1251 }
1252
1253 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1254 {
1255         struct ibmvnic_rwi *rwi;
1256
1257         mutex_lock(&adapter->rwi_lock);
1258
1259         if (!list_empty(&adapter->rwi_list)) {
1260                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1261                                        list);
1262                 list_del(&rwi->list);
1263         } else {
1264                 rwi = NULL;
1265         }
1266
1267         mutex_unlock(&adapter->rwi_lock);
1268         return rwi;
1269 }
1270
1271 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1272 {
1273         struct ibmvnic_rwi *rwi;
1274
1275         rwi = get_next_rwi(adapter);
1276         while (rwi) {
1277                 kfree(rwi);
1278                 rwi = get_next_rwi(adapter);
1279         }
1280 }
1281
1282 static void __ibmvnic_reset(struct work_struct *work)
1283 {
1284         struct ibmvnic_rwi *rwi;
1285         struct ibmvnic_adapter *adapter;
1286         struct net_device *netdev;
1287         u32 reset_state;
1288         int rc;
1289
1290         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1291         netdev = adapter->netdev;
1292
1293         mutex_lock(&adapter->reset_lock);
1294         adapter->resetting = true;
1295         reset_state = adapter->state;
1296
1297         rwi = get_next_rwi(adapter);
1298         while (rwi) {
1299                 rc = do_reset(adapter, rwi, reset_state);
1300                 kfree(rwi);
1301                 if (rc)
1302                         break;
1303
1304                 rwi = get_next_rwi(adapter);
1305         }
1306
1307         if (rc) {
1308                 free_all_rwi(adapter);
1309                 return;
1310         }
1311
1312         adapter->resetting = false;
1313         mutex_unlock(&adapter->reset_lock);
1314 }
1315
1316 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1317                           enum ibmvnic_reset_reason reason)
1318 {
1319         struct ibmvnic_rwi *rwi, *tmp;
1320         struct net_device *netdev = adapter->netdev;
1321         struct list_head *entry;
1322
1323         if (adapter->state == VNIC_REMOVING ||
1324             adapter->state == VNIC_REMOVED) {
1325                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1326                 return;
1327         }
1328
1329         mutex_lock(&adapter->rwi_lock);
1330
1331         list_for_each(entry, &adapter->rwi_list) {
1332                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1333                 if (tmp->reset_reason == reason) {
1334                         netdev_err(netdev, "Matching reset found, skipping\n");
1335                         mutex_unlock(&adapter->rwi_lock);
1336                         return;
1337                 }
1338         }
1339
1340         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1341         if (!rwi) {
1342                 mutex_unlock(&adapter->rwi_lock);
1343                 ibmvnic_close(netdev);
1344                 return;
1345         }
1346
1347         rwi->reset_reason = reason;
1348         list_add_tail(&rwi->list, &adapter->rwi_list);
1349         mutex_unlock(&adapter->rwi_lock);
1350         schedule_work(&adapter->ibmvnic_reset);
1351 }
1352
1353 static void ibmvnic_tx_timeout(struct net_device *dev)
1354 {
1355         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1356
1357         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1358 }
1359
1360 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1361                                   struct ibmvnic_rx_buff *rx_buff)
1362 {
1363         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1364
1365         rx_buff->skb = NULL;
1366
1367         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1368         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1369
1370         atomic_dec(&pool->available);
1371 }
1372
1373 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1374 {
1375         struct net_device *netdev = napi->dev;
1376         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1377         int scrq_num = (int)(napi - adapter->napi);
1378         int frames_processed = 0;
1379 restart_poll:
1380         while (frames_processed < budget) {
1381                 struct sk_buff *skb;
1382                 struct ibmvnic_rx_buff *rx_buff;
1383                 union sub_crq *next;
1384                 u32 length;
1385                 u16 offset;
1386                 u8 flags = 0;
1387
1388                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1389                         break;
1390                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1391                 rx_buff =
1392                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1393                                                           rx_comp.correlator);
1394                 /* do error checking */
1395                 if (next->rx_comp.rc) {
1396                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1397                         /* free the entry */
1398                         next->rx_comp.first = 0;
1399                         remove_buff_from_pool(adapter, rx_buff);
1400                         break;
1401                 }
1402
1403                 length = be32_to_cpu(next->rx_comp.len);
1404                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1405                 flags = next->rx_comp.flags;
1406                 skb = rx_buff->skb;
1407                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1408                                         length);
1409
1410                 /* VLAN Header has been stripped by the system firmware and
1411                  * needs to be inserted by the driver
1412                  */
1413                 if (adapter->rx_vlan_header_insertion &&
1414                     (flags & IBMVNIC_VLAN_STRIPPED))
1415                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1416                                                ntohs(next->rx_comp.vlan_tci));
1417
1418                 /* free the entry */
1419                 next->rx_comp.first = 0;
1420                 remove_buff_from_pool(adapter, rx_buff);
1421
1422                 skb_put(skb, length);
1423                 skb->protocol = eth_type_trans(skb, netdev);
1424
1425                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1426                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1427                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1428                 }
1429
1430                 length = skb->len;
1431                 napi_gro_receive(napi, skb); /* send it up */
1432                 netdev->stats.rx_packets++;
1433                 netdev->stats.rx_bytes += length;
1434                 frames_processed++;
1435         }
1436         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1437
1438         if (frames_processed < budget) {
1439                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1440                 napi_complete_done(napi, frames_processed);
1441                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1442                     napi_reschedule(napi)) {
1443                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1444                         goto restart_poll;
1445                 }
1446         }
1447         return frames_processed;
1448 }
1449
1450 #ifdef CONFIG_NET_POLL_CONTROLLER
1451 static void ibmvnic_netpoll_controller(struct net_device *dev)
1452 {
1453         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1454         int i;
1455
1456         replenish_pools(netdev_priv(dev));
1457         for (i = 0; i < adapter->req_rx_queues; i++)
1458                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1459                                      adapter->rx_scrq[i]);
1460 }
1461 #endif
1462
1463 static const struct net_device_ops ibmvnic_netdev_ops = {
1464         .ndo_open               = ibmvnic_open,
1465         .ndo_stop               = ibmvnic_close,
1466         .ndo_start_xmit         = ibmvnic_xmit,
1467         .ndo_set_rx_mode        = ibmvnic_set_multi,
1468         .ndo_set_mac_address    = ibmvnic_set_mac,
1469         .ndo_validate_addr      = eth_validate_addr,
1470         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1471 #ifdef CONFIG_NET_POLL_CONTROLLER
1472         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1473 #endif
1474 };
1475
1476 /* ethtool functions */
1477
1478 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1479                                       struct ethtool_link_ksettings *cmd)
1480 {
1481         u32 supported, advertising;
1482
1483         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1484                           SUPPORTED_FIBRE);
1485         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1486                             ADVERTISED_FIBRE);
1487         cmd->base.speed = SPEED_1000;
1488         cmd->base.duplex = DUPLEX_FULL;
1489         cmd->base.port = PORT_FIBRE;
1490         cmd->base.phy_address = 0;
1491         cmd->base.autoneg = AUTONEG_ENABLE;
1492
1493         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1494                                                 supported);
1495         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1496                                                 advertising);
1497
1498         return 0;
1499 }
1500
1501 static void ibmvnic_get_drvinfo(struct net_device *dev,
1502                                 struct ethtool_drvinfo *info)
1503 {
1504         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1505         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1506 }
1507
1508 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1509 {
1510         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1511
1512         return adapter->msg_enable;
1513 }
1514
1515 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1516 {
1517         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1518
1519         adapter->msg_enable = data;
1520 }
1521
1522 static u32 ibmvnic_get_link(struct net_device *netdev)
1523 {
1524         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1525
1526         /* Don't need to send a query because we request a logical link up at
1527          * init and then we wait for link state indications
1528          */
1529         return adapter->logical_link_state;
1530 }
1531
1532 static void ibmvnic_get_ringparam(struct net_device *netdev,
1533                                   struct ethtool_ringparam *ring)
1534 {
1535         ring->rx_max_pending = 0;
1536         ring->tx_max_pending = 0;
1537         ring->rx_mini_max_pending = 0;
1538         ring->rx_jumbo_max_pending = 0;
1539         ring->rx_pending = 0;
1540         ring->tx_pending = 0;
1541         ring->rx_mini_pending = 0;
1542         ring->rx_jumbo_pending = 0;
1543 }
1544
1545 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1546 {
1547         int i;
1548
1549         if (stringset != ETH_SS_STATS)
1550                 return;
1551
1552         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1553                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1554 }
1555
1556 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1557 {
1558         switch (sset) {
1559         case ETH_SS_STATS:
1560                 return ARRAY_SIZE(ibmvnic_stats);
1561         default:
1562                 return -EOPNOTSUPP;
1563         }
1564 }
1565
1566 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1567                                       struct ethtool_stats *stats, u64 *data)
1568 {
1569         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1570         union ibmvnic_crq crq;
1571         int i;
1572
1573         memset(&crq, 0, sizeof(crq));
1574         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1575         crq.request_statistics.cmd = REQUEST_STATISTICS;
1576         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1577         crq.request_statistics.len =
1578             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1579
1580         /* Wait for data to be written */
1581         init_completion(&adapter->stats_done);
1582         ibmvnic_send_crq(adapter, &crq);
1583         wait_for_completion(&adapter->stats_done);
1584
1585         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1586                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1587 }
1588
1589 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1590         .get_drvinfo            = ibmvnic_get_drvinfo,
1591         .get_msglevel           = ibmvnic_get_msglevel,
1592         .set_msglevel           = ibmvnic_set_msglevel,
1593         .get_link               = ibmvnic_get_link,
1594         .get_ringparam          = ibmvnic_get_ringparam,
1595         .get_strings            = ibmvnic_get_strings,
1596         .get_sset_count         = ibmvnic_get_sset_count,
1597         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1598         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1599 };
1600
1601 /* Routines for managing CRQs/sCRQs  */
1602
1603 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1604                                   struct ibmvnic_sub_crq_queue *scrq)
1605 {
1606         struct device *dev = &adapter->vdev->dev;
1607         long rc;
1608
1609         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1610
1611         /* Close the sub-crqs */
1612         do {
1613                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1614                                         adapter->vdev->unit_address,
1615                                         scrq->crq_num);
1616         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1617
1618         if (rc) {
1619                 netdev_err(adapter->netdev,
1620                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
1621                            scrq->crq_num, rc);
1622         }
1623
1624         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1625                          DMA_BIDIRECTIONAL);
1626         free_pages((unsigned long)scrq->msgs, 2);
1627         kfree(scrq);
1628 }
1629
1630 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1631                                                         *adapter)
1632 {
1633         struct device *dev = &adapter->vdev->dev;
1634         struct ibmvnic_sub_crq_queue *scrq;
1635         int rc;
1636
1637         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1638         if (!scrq)
1639                 return NULL;
1640
1641         scrq->msgs =
1642                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1643         if (!scrq->msgs) {
1644                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1645                 goto zero_page_failed;
1646         }
1647
1648         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1649                                          DMA_BIDIRECTIONAL);
1650         if (dma_mapping_error(dev, scrq->msg_token)) {
1651                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1652                 goto map_failed;
1653         }
1654
1655         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1656                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1657
1658         if (rc == H_RESOURCE)
1659                 rc = ibmvnic_reset_crq(adapter);
1660
1661         if (rc == H_CLOSED) {
1662                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1663         } else if (rc) {
1664                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1665                 goto reg_failed;
1666         }
1667
1668         scrq->adapter = adapter;
1669         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1670         spin_lock_init(&scrq->lock);
1671
1672         netdev_dbg(adapter->netdev,
1673                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1674                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1675
1676         return scrq;
1677
1678 reg_failed:
1679         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1680                          DMA_BIDIRECTIONAL);
1681 map_failed:
1682         free_pages((unsigned long)scrq->msgs, 2);
1683 zero_page_failed:
1684         kfree(scrq);
1685
1686         return NULL;
1687 }
1688
1689 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1690 {
1691         int i;
1692
1693         if (adapter->tx_scrq) {
1694                 for (i = 0; i < adapter->req_tx_queues; i++) {
1695                         if (!adapter->tx_scrq[i])
1696                                 continue;
1697
1698                         if (adapter->tx_scrq[i]->irq) {
1699                                 free_irq(adapter->tx_scrq[i]->irq,
1700                                          adapter->tx_scrq[i]);
1701                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1702                                 adapter->tx_scrq[i]->irq = 0;
1703                         }
1704
1705                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1706                 }
1707
1708                 kfree(adapter->tx_scrq);
1709                 adapter->tx_scrq = NULL;
1710         }
1711
1712         if (adapter->rx_scrq) {
1713                 for (i = 0; i < adapter->req_rx_queues; i++) {
1714                         if (!adapter->rx_scrq[i])
1715                                 continue;
1716
1717                         if (adapter->rx_scrq[i]->irq) {
1718                                 free_irq(adapter->rx_scrq[i]->irq,
1719                                          adapter->rx_scrq[i]);
1720                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1721                                 adapter->rx_scrq[i]->irq = 0;
1722                         }
1723
1724                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1725                 }
1726
1727                 kfree(adapter->rx_scrq);
1728                 adapter->rx_scrq = NULL;
1729         }
1730 }
1731
1732 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1733                             struct ibmvnic_sub_crq_queue *scrq)
1734 {
1735         struct device *dev = &adapter->vdev->dev;
1736         unsigned long rc;
1737
1738         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1739                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1740         if (rc)
1741                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1742                         scrq->hw_irq, rc);
1743         return rc;
1744 }
1745
1746 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1747                            struct ibmvnic_sub_crq_queue *scrq)
1748 {
1749         struct device *dev = &adapter->vdev->dev;
1750         unsigned long rc;
1751
1752         if (scrq->hw_irq > 0x100000000ULL) {
1753                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1754                 return 1;
1755         }
1756
1757         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1758                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1759         if (rc)
1760                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1761                         scrq->hw_irq, rc);
1762         return rc;
1763 }
1764
1765 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1766                                struct ibmvnic_sub_crq_queue *scrq)
1767 {
1768         struct device *dev = &adapter->vdev->dev;
1769         struct ibmvnic_tx_buff *txbuff;
1770         union sub_crq *next;
1771         int index;
1772         int i, j;
1773         u8 first;
1774
1775 restart_loop:
1776         while (pending_scrq(adapter, scrq)) {
1777                 unsigned int pool = scrq->pool_index;
1778
1779                 next = ibmvnic_next_scrq(adapter, scrq);
1780                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1781                         if (next->tx_comp.rcs[i]) {
1782                                 dev_err(dev, "tx error %x\n",
1783                                         next->tx_comp.rcs[i]);
1784                                 continue;
1785                         }
1786                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1787                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1788
1789                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1790                                 if (!txbuff->data_dma[j])
1791                                         continue;
1792
1793                                 txbuff->data_dma[j] = 0;
1794                         }
1795                         /* if sub_crq was sent indirectly */
1796                         first = txbuff->indir_arr[0].generic.first;
1797                         if (first == IBMVNIC_CRQ_CMD) {
1798                                 dma_unmap_single(dev, txbuff->indir_dma,
1799                                                  sizeof(txbuff->indir_arr),
1800                                                  DMA_TO_DEVICE);
1801                         }
1802
1803                         if (txbuff->last_frag) {
1804                                 if (atomic_sub_return(next->tx_comp.num_comps,
1805                                                       &scrq->used) <=
1806                                     (adapter->req_tx_entries_per_subcrq / 2) &&
1807                                     netif_subqueue_stopped(adapter->netdev,
1808                                                            txbuff->skb)) {
1809                                         netif_wake_subqueue(adapter->netdev,
1810                                                             scrq->pool_index);
1811                                         netdev_dbg(adapter->netdev,
1812                                                    "Started queue %d\n",
1813                                                    scrq->pool_index);
1814                                 }
1815
1816                                 dev_kfree_skb_any(txbuff->skb);
1817                         }
1818
1819                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1820                                                      producer_index] = index;
1821                         adapter->tx_pool[pool].producer_index =
1822                             (adapter->tx_pool[pool].producer_index + 1) %
1823                             adapter->req_tx_entries_per_subcrq;
1824                 }
1825                 /* remove tx_comp scrq*/
1826                 next->tx_comp.first = 0;
1827         }
1828
1829         enable_scrq_irq(adapter, scrq);
1830
1831         if (pending_scrq(adapter, scrq)) {
1832                 disable_scrq_irq(adapter, scrq);
1833                 goto restart_loop;
1834         }
1835
1836         return 0;
1837 }
1838
1839 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1840 {
1841         struct ibmvnic_sub_crq_queue *scrq = instance;
1842         struct ibmvnic_adapter *adapter = scrq->adapter;
1843
1844         disable_scrq_irq(adapter, scrq);
1845         ibmvnic_complete_tx(adapter, scrq);
1846
1847         return IRQ_HANDLED;
1848 }
1849
1850 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1851 {
1852         struct ibmvnic_sub_crq_queue *scrq = instance;
1853         struct ibmvnic_adapter *adapter = scrq->adapter;
1854
1855         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1856                 disable_scrq_irq(adapter, scrq);
1857                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1858         }
1859
1860         return IRQ_HANDLED;
1861 }
1862
1863 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1864 {
1865         struct device *dev = &adapter->vdev->dev;
1866         struct ibmvnic_sub_crq_queue *scrq;
1867         int i = 0, j = 0;
1868         int rc = 0;
1869
1870         for (i = 0; i < adapter->req_tx_queues; i++) {
1871                 scrq = adapter->tx_scrq[i];
1872                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1873
1874                 if (!scrq->irq) {
1875                         rc = -EINVAL;
1876                         dev_err(dev, "Error mapping irq\n");
1877                         goto req_tx_irq_failed;
1878                 }
1879
1880                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1881                                  0, "ibmvnic_tx", scrq);
1882
1883                 if (rc) {
1884                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1885                                 scrq->irq, rc);
1886                         irq_dispose_mapping(scrq->irq);
1887                         goto req_rx_irq_failed;
1888                 }
1889         }
1890
1891         for (i = 0; i < adapter->req_rx_queues; i++) {
1892                 scrq = adapter->rx_scrq[i];
1893                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1894                 if (!scrq->irq) {
1895                         rc = -EINVAL;
1896                         dev_err(dev, "Error mapping irq\n");
1897                         goto req_rx_irq_failed;
1898                 }
1899                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1900                                  0, "ibmvnic_rx", scrq);
1901                 if (rc) {
1902                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1903                                 scrq->irq, rc);
1904                         irq_dispose_mapping(scrq->irq);
1905                         goto req_rx_irq_failed;
1906                 }
1907         }
1908         return rc;
1909
1910 req_rx_irq_failed:
1911         for (j = 0; j < i; j++) {
1912                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1913                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1914         }
1915         i = adapter->req_tx_queues;
1916 req_tx_irq_failed:
1917         for (j = 0; j < i; j++) {
1918                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1919                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1920         }
1921         release_sub_crqs(adapter);
1922         return rc;
1923 }
1924
1925 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
1926 {
1927         struct device *dev = &adapter->vdev->dev;
1928         struct ibmvnic_sub_crq_queue **allqueues;
1929         int registered_queues = 0;
1930         int total_queues;
1931         int more = 0;
1932         int i;
1933
1934         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1935
1936         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
1937         if (!allqueues)
1938                 return -1;
1939
1940         for (i = 0; i < total_queues; i++) {
1941                 allqueues[i] = init_sub_crq_queue(adapter);
1942                 if (!allqueues[i]) {
1943                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1944                         break;
1945                 }
1946                 registered_queues++;
1947         }
1948
1949         /* Make sure we were able to register the minimum number of queues */
1950         if (registered_queues <
1951             adapter->min_tx_queues + adapter->min_rx_queues) {
1952                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1953                 goto tx_failed;
1954         }
1955
1956         /* Distribute the failed allocated queues*/
1957         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1958                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1959                 switch (i % 3) {
1960                 case 0:
1961                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1962                                 adapter->req_rx_queues--;
1963                         else
1964                                 more++;
1965                         break;
1966                 case 1:
1967                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1968                                 adapter->req_tx_queues--;
1969                         else
1970                                 more++;
1971                         break;
1972                 }
1973         }
1974
1975         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1976                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
1977         if (!adapter->tx_scrq)
1978                 goto tx_failed;
1979
1980         for (i = 0; i < adapter->req_tx_queues; i++) {
1981                 adapter->tx_scrq[i] = allqueues[i];
1982                 adapter->tx_scrq[i]->pool_index = i;
1983         }
1984
1985         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1986                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
1987         if (!adapter->rx_scrq)
1988                 goto rx_failed;
1989
1990         for (i = 0; i < adapter->req_rx_queues; i++) {
1991                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1992                 adapter->rx_scrq[i]->scrq_num = i;
1993         }
1994
1995         kfree(allqueues);
1996         return 0;
1997
1998 rx_failed:
1999         kfree(adapter->tx_scrq);
2000         adapter->tx_scrq = NULL;
2001 tx_failed:
2002         for (i = 0; i < registered_queues; i++)
2003                 release_sub_crq_queue(adapter, allqueues[i]);
2004         kfree(allqueues);
2005         return -1;
2006 }
2007
2008 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2009 {
2010         struct device *dev = &adapter->vdev->dev;
2011         union ibmvnic_crq crq;
2012
2013         if (!retry) {
2014                 /* Sub-CRQ entries are 32 byte long */
2015                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2016
2017                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2018                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2019                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2020                         return;
2021                 }
2022
2023                 /* Get the minimum between the queried max and the entries
2024                  * that fit in our PAGE_SIZE
2025                  */
2026                 adapter->req_tx_entries_per_subcrq =
2027                     adapter->max_tx_entries_per_subcrq > entries_page ?
2028                     entries_page : adapter->max_tx_entries_per_subcrq;
2029                 adapter->req_rx_add_entries_per_subcrq =
2030                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
2031                     entries_page : adapter->max_rx_add_entries_per_subcrq;
2032
2033                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2034                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2035                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2036
2037                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2038         }
2039
2040         memset(&crq, 0, sizeof(crq));
2041         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2042         crq.request_capability.cmd = REQUEST_CAPABILITY;
2043
2044         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2045         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2046         atomic_inc(&adapter->running_cap_crqs);
2047         ibmvnic_send_crq(adapter, &crq);
2048
2049         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2050         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2051         atomic_inc(&adapter->running_cap_crqs);
2052         ibmvnic_send_crq(adapter, &crq);
2053
2054         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2055         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2056         atomic_inc(&adapter->running_cap_crqs);
2057         ibmvnic_send_crq(adapter, &crq);
2058
2059         crq.request_capability.capability =
2060             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2061         crq.request_capability.number =
2062             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2063         atomic_inc(&adapter->running_cap_crqs);
2064         ibmvnic_send_crq(adapter, &crq);
2065
2066         crq.request_capability.capability =
2067             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2068         crq.request_capability.number =
2069             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2070         atomic_inc(&adapter->running_cap_crqs);
2071         ibmvnic_send_crq(adapter, &crq);
2072
2073         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2074         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2075         atomic_inc(&adapter->running_cap_crqs);
2076         ibmvnic_send_crq(adapter, &crq);
2077
2078         if (adapter->netdev->flags & IFF_PROMISC) {
2079                 if (adapter->promisc_supported) {
2080                         crq.request_capability.capability =
2081                             cpu_to_be16(PROMISC_REQUESTED);
2082                         crq.request_capability.number = cpu_to_be64(1);
2083                         atomic_inc(&adapter->running_cap_crqs);
2084                         ibmvnic_send_crq(adapter, &crq);
2085                 }
2086         } else {
2087                 crq.request_capability.capability =
2088                     cpu_to_be16(PROMISC_REQUESTED);
2089                 crq.request_capability.number = cpu_to_be64(0);
2090                 atomic_inc(&adapter->running_cap_crqs);
2091                 ibmvnic_send_crq(adapter, &crq);
2092         }
2093 }
2094
2095 static int pending_scrq(struct ibmvnic_adapter *adapter,
2096                         struct ibmvnic_sub_crq_queue *scrq)
2097 {
2098         union sub_crq *entry = &scrq->msgs[scrq->cur];
2099
2100         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2101             adapter->state == VNIC_CLOSING)
2102                 return 1;
2103         else
2104                 return 0;
2105 }
2106
2107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2108                                         struct ibmvnic_sub_crq_queue *scrq)
2109 {
2110         union sub_crq *entry;
2111         unsigned long flags;
2112
2113         spin_lock_irqsave(&scrq->lock, flags);
2114         entry = &scrq->msgs[scrq->cur];
2115         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2116                 if (++scrq->cur == scrq->size)
2117                         scrq->cur = 0;
2118         } else {
2119                 entry = NULL;
2120         }
2121         spin_unlock_irqrestore(&scrq->lock, flags);
2122
2123         return entry;
2124 }
2125
2126 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2127 {
2128         struct ibmvnic_crq_queue *queue = &adapter->crq;
2129         union ibmvnic_crq *crq;
2130
2131         crq = &queue->msgs[queue->cur];
2132         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2133                 if (++queue->cur == queue->size)
2134                         queue->cur = 0;
2135         } else {
2136                 crq = NULL;
2137         }
2138
2139         return crq;
2140 }
2141
2142 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2143                        union sub_crq *sub_crq)
2144 {
2145         unsigned int ua = adapter->vdev->unit_address;
2146         struct device *dev = &adapter->vdev->dev;
2147         u64 *u64_crq = (u64 *)sub_crq;
2148         int rc;
2149
2150         netdev_dbg(adapter->netdev,
2151                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2152                    (unsigned long int)cpu_to_be64(remote_handle),
2153                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2154                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2155                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2156                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2157
2158         /* Make sure the hypervisor sees the complete request */
2159         mb();
2160
2161         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2162                                 cpu_to_be64(remote_handle),
2163                                 cpu_to_be64(u64_crq[0]),
2164                                 cpu_to_be64(u64_crq[1]),
2165                                 cpu_to_be64(u64_crq[2]),
2166                                 cpu_to_be64(u64_crq[3]));
2167
2168         if (rc) {
2169                 if (rc == H_CLOSED)
2170                         dev_warn(dev, "CRQ Queue closed\n");
2171                 dev_err(dev, "Send error (rc=%d)\n", rc);
2172         }
2173
2174         return rc;
2175 }
2176
2177 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2178                                 u64 remote_handle, u64 ioba, u64 num_entries)
2179 {
2180         unsigned int ua = adapter->vdev->unit_address;
2181         struct device *dev = &adapter->vdev->dev;
2182         int rc;
2183
2184         /* Make sure the hypervisor sees the complete request */
2185         mb();
2186         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2187                                 cpu_to_be64(remote_handle),
2188                                 ioba, num_entries);
2189
2190         if (rc) {
2191                 if (rc == H_CLOSED)
2192                         dev_warn(dev, "CRQ Queue closed\n");
2193                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2194         }
2195
2196         return rc;
2197 }
2198
2199 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2200                             union ibmvnic_crq *crq)
2201 {
2202         unsigned int ua = adapter->vdev->unit_address;
2203         struct device *dev = &adapter->vdev->dev;
2204         u64 *u64_crq = (u64 *)crq;
2205         int rc;
2206
2207         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2208                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2209                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2210
2211         /* Make sure the hypervisor sees the complete request */
2212         mb();
2213
2214         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2215                                 cpu_to_be64(u64_crq[0]),
2216                                 cpu_to_be64(u64_crq[1]));
2217
2218         if (rc) {
2219                 if (rc == H_CLOSED)
2220                         dev_warn(dev, "CRQ Queue closed\n");
2221                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2222         }
2223
2224         return rc;
2225 }
2226
2227 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2228 {
2229         union ibmvnic_crq crq;
2230
2231         memset(&crq, 0, sizeof(crq));
2232         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2233         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2234         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2235
2236         return ibmvnic_send_crq(adapter, &crq);
2237 }
2238
2239 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2240 {
2241         union ibmvnic_crq crq;
2242
2243         memset(&crq, 0, sizeof(crq));
2244         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2245         crq.version_exchange.cmd = VERSION_EXCHANGE;
2246         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2247
2248         return ibmvnic_send_crq(adapter, &crq);
2249 }
2250
2251 static void send_login(struct ibmvnic_adapter *adapter)
2252 {
2253         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2254         struct ibmvnic_login_buffer *login_buffer;
2255         struct device *dev = &adapter->vdev->dev;
2256         dma_addr_t rsp_buffer_token;
2257         dma_addr_t buffer_token;
2258         size_t rsp_buffer_size;
2259         union ibmvnic_crq crq;
2260         size_t buffer_size;
2261         __be64 *tx_list_p;
2262         __be64 *rx_list_p;
2263         int i;
2264
2265         buffer_size =
2266             sizeof(struct ibmvnic_login_buffer) +
2267             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2268
2269         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2270         if (!login_buffer)
2271                 goto buf_alloc_failed;
2272
2273         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2274                                       DMA_TO_DEVICE);
2275         if (dma_mapping_error(dev, buffer_token)) {
2276                 dev_err(dev, "Couldn't map login buffer\n");
2277                 goto buf_map_failed;
2278         }
2279
2280         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2281                           sizeof(u64) * adapter->req_tx_queues +
2282                           sizeof(u64) * adapter->req_rx_queues +
2283                           sizeof(u64) * adapter->req_rx_queues +
2284                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2285
2286         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2287         if (!login_rsp_buffer)
2288                 goto buf_rsp_alloc_failed;
2289
2290         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2291                                           rsp_buffer_size, DMA_FROM_DEVICE);
2292         if (dma_mapping_error(dev, rsp_buffer_token)) {
2293                 dev_err(dev, "Couldn't map login rsp buffer\n");
2294                 goto buf_rsp_map_failed;
2295         }
2296
2297         adapter->login_buf = login_buffer;
2298         adapter->login_buf_token = buffer_token;
2299         adapter->login_buf_sz = buffer_size;
2300         adapter->login_rsp_buf = login_rsp_buffer;
2301         adapter->login_rsp_buf_token = rsp_buffer_token;
2302         adapter->login_rsp_buf_sz = rsp_buffer_size;
2303
2304         login_buffer->len = cpu_to_be32(buffer_size);
2305         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2306         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2307         login_buffer->off_txcomp_subcrqs =
2308             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2309         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2310         login_buffer->off_rxcomp_subcrqs =
2311             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2312                         sizeof(u64) * adapter->req_tx_queues);
2313         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2314         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2315
2316         tx_list_p = (__be64 *)((char *)login_buffer +
2317                                       sizeof(struct ibmvnic_login_buffer));
2318         rx_list_p = (__be64 *)((char *)login_buffer +
2319                                       sizeof(struct ibmvnic_login_buffer) +
2320                                       sizeof(u64) * adapter->req_tx_queues);
2321
2322         for (i = 0; i < adapter->req_tx_queues; i++) {
2323                 if (adapter->tx_scrq[i]) {
2324                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2325                                                    crq_num);
2326                 }
2327         }
2328
2329         for (i = 0; i < adapter->req_rx_queues; i++) {
2330                 if (adapter->rx_scrq[i]) {
2331                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2332                                                    crq_num);
2333                 }
2334         }
2335
2336         netdev_dbg(adapter->netdev, "Login Buffer:\n");
2337         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2338                 netdev_dbg(adapter->netdev, "%016lx\n",
2339                            ((unsigned long int *)(adapter->login_buf))[i]);
2340         }
2341
2342         memset(&crq, 0, sizeof(crq));
2343         crq.login.first = IBMVNIC_CRQ_CMD;
2344         crq.login.cmd = LOGIN;
2345         crq.login.ioba = cpu_to_be32(buffer_token);
2346         crq.login.len = cpu_to_be32(buffer_size);
2347         ibmvnic_send_crq(adapter, &crq);
2348
2349         return;
2350
2351 buf_rsp_map_failed:
2352         kfree(login_rsp_buffer);
2353 buf_rsp_alloc_failed:
2354         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2355 buf_map_failed:
2356         kfree(login_buffer);
2357 buf_alloc_failed:
2358         return;
2359 }
2360
2361 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2362                              u32 len, u8 map_id)
2363 {
2364         union ibmvnic_crq crq;
2365
2366         memset(&crq, 0, sizeof(crq));
2367         crq.request_map.first = IBMVNIC_CRQ_CMD;
2368         crq.request_map.cmd = REQUEST_MAP;
2369         crq.request_map.map_id = map_id;
2370         crq.request_map.ioba = cpu_to_be32(addr);
2371         crq.request_map.len = cpu_to_be32(len);
2372         ibmvnic_send_crq(adapter, &crq);
2373 }
2374
2375 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2376 {
2377         union ibmvnic_crq crq;
2378
2379         memset(&crq, 0, sizeof(crq));
2380         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2381         crq.request_unmap.cmd = REQUEST_UNMAP;
2382         crq.request_unmap.map_id = map_id;
2383         ibmvnic_send_crq(adapter, &crq);
2384 }
2385
2386 static void send_map_query(struct ibmvnic_adapter *adapter)
2387 {
2388         union ibmvnic_crq crq;
2389
2390         memset(&crq, 0, sizeof(crq));
2391         crq.query_map.first = IBMVNIC_CRQ_CMD;
2392         crq.query_map.cmd = QUERY_MAP;
2393         ibmvnic_send_crq(adapter, &crq);
2394 }
2395
2396 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2397 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2398 {
2399         union ibmvnic_crq crq;
2400
2401         atomic_set(&adapter->running_cap_crqs, 0);
2402         memset(&crq, 0, sizeof(crq));
2403         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2404         crq.query_capability.cmd = QUERY_CAPABILITY;
2405
2406         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2407         atomic_inc(&adapter->running_cap_crqs);
2408         ibmvnic_send_crq(adapter, &crq);
2409
2410         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2411         atomic_inc(&adapter->running_cap_crqs);
2412         ibmvnic_send_crq(adapter, &crq);
2413
2414         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2415         atomic_inc(&adapter->running_cap_crqs);
2416         ibmvnic_send_crq(adapter, &crq);
2417
2418         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2419         atomic_inc(&adapter->running_cap_crqs);
2420         ibmvnic_send_crq(adapter, &crq);
2421
2422         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2423         atomic_inc(&adapter->running_cap_crqs);
2424         ibmvnic_send_crq(adapter, &crq);
2425
2426         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2427         atomic_inc(&adapter->running_cap_crqs);
2428         ibmvnic_send_crq(adapter, &crq);
2429
2430         crq.query_capability.capability =
2431             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2432         atomic_inc(&adapter->running_cap_crqs);
2433         ibmvnic_send_crq(adapter, &crq);
2434
2435         crq.query_capability.capability =
2436             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2437         atomic_inc(&adapter->running_cap_crqs);
2438         ibmvnic_send_crq(adapter, &crq);
2439
2440         crq.query_capability.capability =
2441             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2442         atomic_inc(&adapter->running_cap_crqs);
2443         ibmvnic_send_crq(adapter, &crq);
2444
2445         crq.query_capability.capability =
2446             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2447         atomic_inc(&adapter->running_cap_crqs);
2448         ibmvnic_send_crq(adapter, &crq);
2449
2450         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2451         atomic_inc(&adapter->running_cap_crqs);
2452         ibmvnic_send_crq(adapter, &crq);
2453
2454         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2455         atomic_inc(&adapter->running_cap_crqs);
2456         ibmvnic_send_crq(adapter, &crq);
2457
2458         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2459         atomic_inc(&adapter->running_cap_crqs);
2460         ibmvnic_send_crq(adapter, &crq);
2461
2462         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2463         atomic_inc(&adapter->running_cap_crqs);
2464         ibmvnic_send_crq(adapter, &crq);
2465
2466         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2467         atomic_inc(&adapter->running_cap_crqs);
2468         ibmvnic_send_crq(adapter, &crq);
2469
2470         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2471         atomic_inc(&adapter->running_cap_crqs);
2472         ibmvnic_send_crq(adapter, &crq);
2473
2474         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2475         atomic_inc(&adapter->running_cap_crqs);
2476         ibmvnic_send_crq(adapter, &crq);
2477
2478         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2479         atomic_inc(&adapter->running_cap_crqs);
2480         ibmvnic_send_crq(adapter, &crq);
2481
2482         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2483         atomic_inc(&adapter->running_cap_crqs);
2484         ibmvnic_send_crq(adapter, &crq);
2485
2486         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2487         atomic_inc(&adapter->running_cap_crqs);
2488         ibmvnic_send_crq(adapter, &crq);
2489
2490         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2491         atomic_inc(&adapter->running_cap_crqs);
2492         ibmvnic_send_crq(adapter, &crq);
2493
2494         crq.query_capability.capability =
2495                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2496         atomic_inc(&adapter->running_cap_crqs);
2497         ibmvnic_send_crq(adapter, &crq);
2498
2499         crq.query_capability.capability =
2500                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2501         atomic_inc(&adapter->running_cap_crqs);
2502         ibmvnic_send_crq(adapter, &crq);
2503
2504         crq.query_capability.capability =
2505                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2506         atomic_inc(&adapter->running_cap_crqs);
2507         ibmvnic_send_crq(adapter, &crq);
2508
2509         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2510         atomic_inc(&adapter->running_cap_crqs);
2511         ibmvnic_send_crq(adapter, &crq);
2512 }
2513
2514 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2515 {
2516         struct device *dev = &adapter->vdev->dev;
2517         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2518         union ibmvnic_crq crq;
2519         int i;
2520
2521         dma_unmap_single(dev, adapter->ip_offload_tok,
2522                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2523
2524         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2525         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2526                 netdev_dbg(adapter->netdev, "%016lx\n",
2527                            ((unsigned long int *)(buf))[i]);
2528
2529         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2530         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2531         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2532                    buf->tcp_ipv4_chksum);
2533         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2534                    buf->tcp_ipv6_chksum);
2535         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2536                    buf->udp_ipv4_chksum);
2537         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2538                    buf->udp_ipv6_chksum);
2539         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2540                    buf->large_tx_ipv4);
2541         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2542                    buf->large_tx_ipv6);
2543         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2544                    buf->large_rx_ipv4);
2545         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2546                    buf->large_rx_ipv6);
2547         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2548                    buf->max_ipv4_header_size);
2549         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2550                    buf->max_ipv6_header_size);
2551         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2552                    buf->max_tcp_header_size);
2553         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2554                    buf->max_udp_header_size);
2555         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2556                    buf->max_large_tx_size);
2557         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2558                    buf->max_large_rx_size);
2559         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2560                    buf->ipv6_extension_header);
2561         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2562                    buf->tcp_pseudosum_req);
2563         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2564                    buf->num_ipv6_ext_headers);
2565         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2566                    buf->off_ipv6_ext_headers);
2567
2568         adapter->ip_offload_ctrl_tok =
2569             dma_map_single(dev, &adapter->ip_offload_ctrl,
2570                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2571
2572         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2573                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2574                 return;
2575         }
2576
2577         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2578         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2579         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2580         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2581         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2582
2583         /* large_tx/rx disabled for now, additional features needed */
2584         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2585         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2586         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2587         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2588
2589         adapter->netdev->features = NETIF_F_GSO;
2590
2591         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2592                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2593
2594         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2595                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2596
2597         if ((adapter->netdev->features &
2598             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2599                 adapter->netdev->features |= NETIF_F_RXCSUM;
2600
2601         memset(&crq, 0, sizeof(crq));
2602         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2603         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2604         crq.control_ip_offload.len =
2605             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2606         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2607         ibmvnic_send_crq(adapter, &crq);
2608 }
2609
2610 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2611                                   struct ibmvnic_adapter *adapter)
2612 {
2613         struct device *dev = &adapter->vdev->dev;
2614         struct ibmvnic_error_buff *error_buff, *tmp;
2615         unsigned long flags;
2616         bool found = false;
2617         int i;
2618
2619         if (!crq->request_error_rsp.rc.code) {
2620                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2621                          crq->request_error_rsp.rc.code);
2622                 return;
2623         }
2624
2625         spin_lock_irqsave(&adapter->error_list_lock, flags);
2626         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2627                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2628                         found = true;
2629                         list_del(&error_buff->list);
2630                         break;
2631                 }
2632         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2633
2634         if (!found) {
2635                 dev_err(dev, "Couldn't find error id %x\n",
2636                         be32_to_cpu(crq->request_error_rsp.error_id));
2637                 return;
2638         }
2639
2640         dev_err(dev, "Detailed info for error id %x:",
2641                 be32_to_cpu(crq->request_error_rsp.error_id));
2642
2643         for (i = 0; i < error_buff->len; i++) {
2644                 pr_cont("%02x", (int)error_buff->buff[i]);
2645                 if (i % 8 == 7)
2646                         pr_cont(" ");
2647         }
2648         pr_cont("\n");
2649
2650         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2651                          DMA_FROM_DEVICE);
2652         kfree(error_buff->buff);
2653         kfree(error_buff);
2654 }
2655
2656 static void request_error_information(struct ibmvnic_adapter *adapter,
2657                                       union ibmvnic_crq *err_crq)
2658 {
2659         struct device *dev = &adapter->vdev->dev;
2660         struct net_device *netdev = adapter->netdev;
2661         struct ibmvnic_error_buff *error_buff;
2662         unsigned long timeout = msecs_to_jiffies(30000);
2663         union ibmvnic_crq crq;
2664         unsigned long flags;
2665         int rc, detail_len;
2666
2667         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2668         if (!error_buff)
2669                 return;
2670
2671         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2672         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2673         if (!error_buff->buff) {
2674                 kfree(error_buff);
2675                 return;
2676         }
2677
2678         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2679                                          DMA_FROM_DEVICE);
2680         if (dma_mapping_error(dev, error_buff->dma)) {
2681                 netdev_err(netdev, "Couldn't map error buffer\n");
2682                 kfree(error_buff->buff);
2683                 kfree(error_buff);
2684                 return;
2685         }
2686
2687         error_buff->len = detail_len;
2688         error_buff->error_id = err_crq->error_indication.error_id;
2689
2690         spin_lock_irqsave(&adapter->error_list_lock, flags);
2691         list_add_tail(&error_buff->list, &adapter->errors);
2692         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2693
2694         memset(&crq, 0, sizeof(crq));
2695         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2696         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2697         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2698         crq.request_error_info.len = cpu_to_be32(detail_len);
2699         crq.request_error_info.error_id = err_crq->error_indication.error_id;
2700
2701         rc = ibmvnic_send_crq(adapter, &crq);
2702         if (rc) {
2703                 netdev_err(netdev, "failed to request error information\n");
2704                 goto err_info_fail;
2705         }
2706
2707         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2708                 netdev_err(netdev, "timeout waiting for error information\n");
2709                 goto err_info_fail;
2710         }
2711
2712         return;
2713
2714 err_info_fail:
2715         spin_lock_irqsave(&adapter->error_list_lock, flags);
2716         list_del(&error_buff->list);
2717         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2718
2719         kfree(error_buff->buff);
2720         kfree(error_buff);
2721 }
2722
2723 static void handle_error_indication(union ibmvnic_crq *crq,
2724                                     struct ibmvnic_adapter *adapter)
2725 {
2726         struct device *dev = &adapter->vdev->dev;
2727
2728         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2729                 crq->error_indication.flags
2730                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2731                 be32_to_cpu(crq->error_indication.error_id),
2732                 be16_to_cpu(crq->error_indication.error_cause));
2733
2734         if (be32_to_cpu(crq->error_indication.error_id))
2735                 request_error_information(adapter, crq);
2736
2737         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2738                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2739 }
2740
2741 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2742                                   struct ibmvnic_adapter *adapter)
2743 {
2744         struct net_device *netdev = adapter->netdev;
2745         struct device *dev = &adapter->vdev->dev;
2746         long rc;
2747
2748         rc = crq->change_mac_addr_rsp.rc.code;
2749         if (rc) {
2750                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2751                 return;
2752         }
2753         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2754                ETH_ALEN);
2755 }
2756
2757 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2758                                    struct ibmvnic_adapter *adapter)
2759 {
2760         struct device *dev = &adapter->vdev->dev;
2761         u64 *req_value;
2762         char *name;
2763
2764         atomic_dec(&adapter->running_cap_crqs);
2765         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2766         case REQ_TX_QUEUES:
2767                 req_value = &adapter->req_tx_queues;
2768                 name = "tx";
2769                 break;
2770         case REQ_RX_QUEUES:
2771                 req_value = &adapter->req_rx_queues;
2772                 name = "rx";
2773                 break;
2774         case REQ_RX_ADD_QUEUES:
2775                 req_value = &adapter->req_rx_add_queues;
2776                 name = "rx_add";
2777                 break;
2778         case REQ_TX_ENTRIES_PER_SUBCRQ:
2779                 req_value = &adapter->req_tx_entries_per_subcrq;
2780                 name = "tx_entries_per_subcrq";
2781                 break;
2782         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2783                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2784                 name = "rx_add_entries_per_subcrq";
2785                 break;
2786         case REQ_MTU:
2787                 req_value = &adapter->req_mtu;
2788                 name = "mtu";
2789                 break;
2790         case PROMISC_REQUESTED:
2791                 req_value = &adapter->promisc;
2792                 name = "promisc";
2793                 break;
2794         default:
2795                 dev_err(dev, "Got invalid cap request rsp %d\n",
2796                         crq->request_capability.capability);
2797                 return;
2798         }
2799
2800         switch (crq->request_capability_rsp.rc.code) {
2801         case SUCCESS:
2802                 break;
2803         case PARTIALSUCCESS:
2804                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2805                          *req_value,
2806                          (long int)be64_to_cpu(crq->request_capability_rsp.
2807                                                number), name);
2808                 release_sub_crqs(adapter);
2809                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2810                 ibmvnic_send_req_caps(adapter, 1);
2811                 return;
2812         default:
2813                 dev_err(dev, "Error %d in request cap rsp\n",
2814                         crq->request_capability_rsp.rc.code);
2815                 return;
2816         }
2817
2818         /* Done receiving requested capabilities, query IP offload support */
2819         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2820                 union ibmvnic_crq newcrq;
2821                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2822                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2823                     &adapter->ip_offload_buf;
2824
2825                 adapter->wait_capability = false;
2826                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2827                                                          buf_sz,
2828                                                          DMA_FROM_DEVICE);
2829
2830                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2831                         if (!firmware_has_feature(FW_FEATURE_CMO))
2832                                 dev_err(dev, "Couldn't map offload buffer\n");
2833                         return;
2834                 }
2835
2836                 memset(&newcrq, 0, sizeof(newcrq));
2837                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2838                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2839                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2840                 newcrq.query_ip_offload.ioba =
2841                     cpu_to_be32(adapter->ip_offload_tok);
2842
2843                 ibmvnic_send_crq(adapter, &newcrq);
2844         }
2845 }
2846
2847 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2848                             struct ibmvnic_adapter *adapter)
2849 {
2850         struct device *dev = &adapter->vdev->dev;
2851         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2852         struct ibmvnic_login_buffer *login = adapter->login_buf;
2853         int i;
2854
2855         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2856                          DMA_BIDIRECTIONAL);
2857         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2858                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2859
2860         /* If the number of queues requested can't be allocated by the
2861          * server, the login response will return with code 1. We will need
2862          * to resend the login buffer with fewer queues requested.
2863          */
2864         if (login_rsp_crq->generic.rc.code) {
2865                 adapter->renegotiate = true;
2866                 complete(&adapter->init_done);
2867                 return 0;
2868         }
2869
2870         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2871         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2872                 netdev_dbg(adapter->netdev, "%016lx\n",
2873                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2874         }
2875
2876         /* Sanity checks */
2877         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2878             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2879              adapter->req_rx_add_queues !=
2880              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2881                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2882                 ibmvnic_remove(adapter->vdev);
2883                 return -EIO;
2884         }
2885         complete(&adapter->init_done);
2886
2887         return 0;
2888 }
2889
2890 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2891                                    struct ibmvnic_adapter *adapter)
2892 {
2893         struct device *dev = &adapter->vdev->dev;
2894         u8 map_id = crq->request_map_rsp.map_id;
2895         int tx_subcrqs;
2896         int rx_subcrqs;
2897         long rc;
2898         int i;
2899
2900         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2901         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2902
2903         rc = crq->request_map_rsp.rc.code;
2904         if (rc) {
2905                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2906                 adapter->map_id--;
2907                 /* need to find and zero tx/rx_pool map_id */
2908                 for (i = 0; i < tx_subcrqs; i++) {
2909                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2910                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2911                 }
2912                 for (i = 0; i < rx_subcrqs; i++) {
2913                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2914                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2915                 }
2916         }
2917         complete(&adapter->fw_done);
2918 }
2919
2920 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2921                                      struct ibmvnic_adapter *adapter)
2922 {
2923         struct device *dev = &adapter->vdev->dev;
2924         long rc;
2925
2926         rc = crq->request_unmap_rsp.rc.code;
2927         if (rc)
2928                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2929 }
2930
2931 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2932                                  struct ibmvnic_adapter *adapter)
2933 {
2934         struct net_device *netdev = adapter->netdev;
2935         struct device *dev = &adapter->vdev->dev;
2936         long rc;
2937
2938         rc = crq->query_map_rsp.rc.code;
2939         if (rc) {
2940                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2941                 return;
2942         }
2943         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2944                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2945                    crq->query_map_rsp.free_pages);
2946 }
2947
2948 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2949                                  struct ibmvnic_adapter *adapter)
2950 {
2951         struct net_device *netdev = adapter->netdev;
2952         struct device *dev = &adapter->vdev->dev;
2953         long rc;
2954
2955         atomic_dec(&adapter->running_cap_crqs);
2956         netdev_dbg(netdev, "Outstanding queries: %d\n",
2957                    atomic_read(&adapter->running_cap_crqs));
2958         rc = crq->query_capability.rc.code;
2959         if (rc) {
2960                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2961                 goto out;
2962         }
2963
2964         switch (be16_to_cpu(crq->query_capability.capability)) {
2965         case MIN_TX_QUEUES:
2966                 adapter->min_tx_queues =
2967                     be64_to_cpu(crq->query_capability.number);
2968                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2969                            adapter->min_tx_queues);
2970                 break;
2971         case MIN_RX_QUEUES:
2972                 adapter->min_rx_queues =
2973                     be64_to_cpu(crq->query_capability.number);
2974                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2975                            adapter->min_rx_queues);
2976                 break;
2977         case MIN_RX_ADD_QUEUES:
2978                 adapter->min_rx_add_queues =
2979                     be64_to_cpu(crq->query_capability.number);
2980                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2981                            adapter->min_rx_add_queues);
2982                 break;
2983         case MAX_TX_QUEUES:
2984                 adapter->max_tx_queues =
2985                     be64_to_cpu(crq->query_capability.number);
2986                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2987                            adapter->max_tx_queues);
2988                 break;
2989         case MAX_RX_QUEUES:
2990                 adapter->max_rx_queues =
2991                     be64_to_cpu(crq->query_capability.number);
2992                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2993                            adapter->max_rx_queues);
2994                 break;
2995         case MAX_RX_ADD_QUEUES:
2996                 adapter->max_rx_add_queues =
2997                     be64_to_cpu(crq->query_capability.number);
2998                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2999                            adapter->max_rx_add_queues);
3000                 break;
3001         case MIN_TX_ENTRIES_PER_SUBCRQ:
3002                 adapter->min_tx_entries_per_subcrq =
3003                     be64_to_cpu(crq->query_capability.number);
3004                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3005                            adapter->min_tx_entries_per_subcrq);
3006                 break;
3007         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3008                 adapter->min_rx_add_entries_per_subcrq =
3009                     be64_to_cpu(crq->query_capability.number);
3010                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3011                            adapter->min_rx_add_entries_per_subcrq);
3012                 break;
3013         case MAX_TX_ENTRIES_PER_SUBCRQ:
3014                 adapter->max_tx_entries_per_subcrq =
3015                     be64_to_cpu(crq->query_capability.number);
3016                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3017                            adapter->max_tx_entries_per_subcrq);
3018                 break;
3019         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3020                 adapter->max_rx_add_entries_per_subcrq =
3021                     be64_to_cpu(crq->query_capability.number);
3022                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3023                            adapter->max_rx_add_entries_per_subcrq);
3024                 break;
3025         case TCP_IP_OFFLOAD:
3026                 adapter->tcp_ip_offload =
3027                     be64_to_cpu(crq->query_capability.number);
3028                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3029                            adapter->tcp_ip_offload);
3030                 break;
3031         case PROMISC_SUPPORTED:
3032                 adapter->promisc_supported =
3033                     be64_to_cpu(crq->query_capability.number);
3034                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3035                            adapter->promisc_supported);
3036                 break;
3037         case MIN_MTU:
3038                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3039                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3040                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3041                 break;
3042         case MAX_MTU:
3043                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3044                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3045                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3046                 break;
3047         case MAX_MULTICAST_FILTERS:
3048                 adapter->max_multicast_filters =
3049                     be64_to_cpu(crq->query_capability.number);
3050                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3051                            adapter->max_multicast_filters);
3052                 break;
3053         case VLAN_HEADER_INSERTION:
3054                 adapter->vlan_header_insertion =
3055                     be64_to_cpu(crq->query_capability.number);
3056                 if (adapter->vlan_header_insertion)
3057                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3058                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3059                            adapter->vlan_header_insertion);
3060                 break;
3061         case RX_VLAN_HEADER_INSERTION:
3062                 adapter->rx_vlan_header_insertion =
3063                     be64_to_cpu(crq->query_capability.number);
3064                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3065                            adapter->rx_vlan_header_insertion);
3066                 break;
3067         case MAX_TX_SG_ENTRIES:
3068                 adapter->max_tx_sg_entries =
3069                     be64_to_cpu(crq->query_capability.number);
3070                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3071                            adapter->max_tx_sg_entries);
3072                 break;
3073         case RX_SG_SUPPORTED:
3074                 adapter->rx_sg_supported =
3075                     be64_to_cpu(crq->query_capability.number);
3076                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3077                            adapter->rx_sg_supported);
3078                 break;
3079         case OPT_TX_COMP_SUB_QUEUES:
3080                 adapter->opt_tx_comp_sub_queues =
3081                     be64_to_cpu(crq->query_capability.number);
3082                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3083                            adapter->opt_tx_comp_sub_queues);
3084                 break;
3085         case OPT_RX_COMP_QUEUES:
3086                 adapter->opt_rx_comp_queues =
3087                     be64_to_cpu(crq->query_capability.number);
3088                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3089                            adapter->opt_rx_comp_queues);
3090                 break;
3091         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3092                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3093                     be64_to_cpu(crq->query_capability.number);
3094                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3095                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3096                 break;
3097         case OPT_TX_ENTRIES_PER_SUBCRQ:
3098                 adapter->opt_tx_entries_per_subcrq =
3099                     be64_to_cpu(crq->query_capability.number);
3100                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3101                            adapter->opt_tx_entries_per_subcrq);
3102                 break;
3103         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3104                 adapter->opt_rxba_entries_per_subcrq =
3105                     be64_to_cpu(crq->query_capability.number);
3106                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3107                            adapter->opt_rxba_entries_per_subcrq);
3108                 break;
3109         case TX_RX_DESC_REQ:
3110                 adapter->tx_rx_desc_req = crq->query_capability.number;
3111                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3112                            adapter->tx_rx_desc_req);
3113                 break;
3114
3115         default:
3116                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3117                            crq->query_capability.capability);
3118         }
3119
3120 out:
3121         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3122                 adapter->wait_capability = false;
3123                 ibmvnic_send_req_caps(adapter, 0);
3124         }
3125 }
3126
3127 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3128                                struct ibmvnic_adapter *adapter)
3129 {
3130         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3131         struct net_device *netdev = adapter->netdev;
3132         struct device *dev = &adapter->vdev->dev;
3133         u64 *u64_crq = (u64 *)crq;
3134         long rc;
3135
3136         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3137                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3138                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3139         switch (gen_crq->first) {
3140         case IBMVNIC_CRQ_INIT_RSP:
3141                 switch (gen_crq->cmd) {
3142                 case IBMVNIC_CRQ_INIT:
3143                         dev_info(dev, "Partner initialized\n");
3144                         break;
3145                 case IBMVNIC_CRQ_INIT_COMPLETE:
3146                         dev_info(dev, "Partner initialization complete\n");
3147                         send_version_xchg(adapter);
3148                         break;
3149                 default:
3150                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3151                 }
3152                 return;
3153         case IBMVNIC_CRQ_XPORT_EVENT:
3154                 netif_carrier_off(netdev);
3155                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3156                         dev_info(dev, "Migrated, re-enabling adapter\n");
3157                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3158                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3159                         dev_info(dev, "Backing device failover detected\n");
3160                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3161                 } else {
3162                         /* The adapter lost the connection */
3163                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3164                                 gen_crq->cmd);
3165                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3166                 }
3167                 return;
3168         case IBMVNIC_CRQ_CMD_RSP:
3169                 break;
3170         default:
3171                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3172                         gen_crq->first);
3173                 return;
3174         }
3175
3176         switch (gen_crq->cmd) {
3177         case VERSION_EXCHANGE_RSP:
3178                 rc = crq->version_exchange_rsp.rc.code;
3179                 if (rc) {
3180                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3181                         break;
3182                 }
3183                 dev_info(dev, "Partner protocol version is %d\n",
3184                          crq->version_exchange_rsp.version);
3185                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3186                     ibmvnic_version)
3187                         ibmvnic_version =
3188                             be16_to_cpu(crq->version_exchange_rsp.version);
3189                 send_cap_queries(adapter);
3190                 break;
3191         case QUERY_CAPABILITY_RSP:
3192                 handle_query_cap_rsp(crq, adapter);
3193                 break;
3194         case QUERY_MAP_RSP:
3195                 handle_query_map_rsp(crq, adapter);
3196                 break;
3197         case REQUEST_MAP_RSP:
3198                 handle_request_map_rsp(crq, adapter);
3199                 break;
3200         case REQUEST_UNMAP_RSP:
3201                 handle_request_unmap_rsp(crq, adapter);
3202                 break;
3203         case REQUEST_CAPABILITY_RSP:
3204                 handle_request_cap_rsp(crq, adapter);
3205                 break;
3206         case LOGIN_RSP:
3207                 netdev_dbg(netdev, "Got Login Response\n");
3208                 handle_login_rsp(crq, adapter);
3209                 break;
3210         case LOGICAL_LINK_STATE_RSP:
3211                 netdev_dbg(netdev,
3212                            "Got Logical Link State Response, state: %d rc: %d\n",
3213                            crq->logical_link_state_rsp.link_state,
3214                            crq->logical_link_state_rsp.rc.code);
3215                 adapter->logical_link_state =
3216                     crq->logical_link_state_rsp.link_state;
3217                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3218                 complete(&adapter->init_done);
3219                 break;
3220         case LINK_STATE_INDICATION:
3221                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3222                 adapter->phys_link_state =
3223                     crq->link_state_indication.phys_link_state;
3224                 adapter->logical_link_state =
3225                     crq->link_state_indication.logical_link_state;
3226                 break;
3227         case CHANGE_MAC_ADDR_RSP:
3228                 netdev_dbg(netdev, "Got MAC address change Response\n");
3229                 handle_change_mac_rsp(crq, adapter);
3230                 break;
3231         case ERROR_INDICATION:
3232                 netdev_dbg(netdev, "Got Error Indication\n");
3233                 handle_error_indication(crq, adapter);
3234                 break;
3235         case REQUEST_ERROR_RSP:
3236                 netdev_dbg(netdev, "Got Error Detail Response\n");
3237                 handle_error_info_rsp(crq, adapter);
3238                 break;
3239         case REQUEST_STATISTICS_RSP:
3240                 netdev_dbg(netdev, "Got Statistics Response\n");
3241                 complete(&adapter->stats_done);
3242                 break;
3243         case QUERY_IP_OFFLOAD_RSP:
3244                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3245                 handle_query_ip_offload_rsp(adapter);
3246                 break;
3247         case MULTICAST_CTRL_RSP:
3248                 netdev_dbg(netdev, "Got multicast control Response\n");
3249                 break;
3250         case CONTROL_IP_OFFLOAD_RSP:
3251                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3252                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3253                                  sizeof(adapter->ip_offload_ctrl),
3254                                  DMA_TO_DEVICE);
3255                 complete(&adapter->init_done);
3256                 break;
3257         case COLLECT_FW_TRACE_RSP:
3258                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3259                 complete(&adapter->fw_done);
3260                 break;
3261         default:
3262                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3263                            gen_crq->cmd);
3264         }
3265 }
3266
3267 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3268 {
3269         struct ibmvnic_adapter *adapter = instance;
3270
3271         tasklet_schedule(&adapter->tasklet);
3272         return IRQ_HANDLED;
3273 }
3274
3275 static void ibmvnic_tasklet(void *data)
3276 {
3277         struct ibmvnic_adapter *adapter = data;
3278         struct ibmvnic_crq_queue *queue = &adapter->crq;
3279         union ibmvnic_crq *crq;
3280         unsigned long flags;
3281         bool done = false;
3282
3283         spin_lock_irqsave(&queue->lock, flags);
3284         while (!done) {
3285                 /* Pull all the valid messages off the CRQ */
3286                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3287                         ibmvnic_handle_crq(crq, adapter);
3288                         crq->generic.first = 0;
3289                 }
3290
3291                 /* remain in tasklet until all
3292                  * capabilities responses are received
3293                  */
3294                 if (!adapter->wait_capability)
3295                         done = true;
3296         }
3297         /* if capabilities CRQ's were sent in this tasklet, the following
3298          * tasklet must wait until all responses are received
3299          */
3300         if (atomic_read(&adapter->running_cap_crqs) != 0)
3301                 adapter->wait_capability = true;
3302         spin_unlock_irqrestore(&queue->lock, flags);
3303 }
3304
3305 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3306 {
3307         struct vio_dev *vdev = adapter->vdev;
3308         int rc;
3309
3310         do {
3311                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3312         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3313
3314         if (rc)
3315                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3316
3317         return rc;
3318 }
3319
3320 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3321 {
3322         struct ibmvnic_crq_queue *crq = &adapter->crq;
3323         struct device *dev = &adapter->vdev->dev;
3324         struct vio_dev *vdev = adapter->vdev;
3325         int rc;
3326
3327         /* Close the CRQ */
3328         do {
3329                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3330         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3331
3332         /* Clean out the queue */
3333         memset(crq->msgs, 0, PAGE_SIZE);
3334         crq->cur = 0;
3335
3336         /* And re-open it again */
3337         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3338                                 crq->msg_token, PAGE_SIZE);
3339
3340         if (rc == H_CLOSED)
3341                 /* Adapter is good, but other end is not ready */
3342                 dev_warn(dev, "Partner adapter not ready\n");
3343         else if (rc != 0)
3344                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3345
3346         return rc;
3347 }
3348
3349 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3350 {
3351         struct ibmvnic_crq_queue *crq = &adapter->crq;
3352         struct vio_dev *vdev = adapter->vdev;
3353         long rc;
3354
3355         if (!crq->msgs)
3356                 return;
3357
3358         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3359         free_irq(vdev->irq, adapter);
3360         tasklet_kill(&adapter->tasklet);
3361         do {
3362                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3363         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3364
3365         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3366                          DMA_BIDIRECTIONAL);
3367         free_page((unsigned long)crq->msgs);
3368         crq->msgs = NULL;
3369 }
3370
3371 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3372 {
3373         struct ibmvnic_crq_queue *crq = &adapter->crq;
3374         struct device *dev = &adapter->vdev->dev;
3375         struct vio_dev *vdev = adapter->vdev;
3376         int rc, retrc = -ENOMEM;
3377
3378         if (crq->msgs)
3379                 return 0;
3380
3381         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3382         /* Should we allocate more than one page? */
3383
3384         if (!crq->msgs)
3385                 return -ENOMEM;
3386
3387         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3388         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3389                                         DMA_BIDIRECTIONAL);
3390         if (dma_mapping_error(dev, crq->msg_token))
3391                 goto map_failed;
3392
3393         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3394                                 crq->msg_token, PAGE_SIZE);
3395
3396         if (rc == H_RESOURCE)
3397                 /* maybe kexecing and resource is busy. try a reset */
3398                 rc = ibmvnic_reset_crq(adapter);
3399         retrc = rc;
3400
3401         if (rc == H_CLOSED) {
3402                 dev_warn(dev, "Partner adapter not ready\n");
3403         } else if (rc) {
3404                 dev_warn(dev, "Error %d opening adapter\n", rc);
3405                 goto reg_crq_failed;
3406         }
3407
3408         retrc = 0;
3409
3410         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3411                      (unsigned long)adapter);
3412
3413         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3414         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3415                          adapter);
3416         if (rc) {
3417                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3418                         vdev->irq, rc);
3419                 goto req_irq_failed;
3420         }
3421
3422         rc = vio_enable_interrupts(vdev);
3423         if (rc) {
3424                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3425                 goto req_irq_failed;
3426         }
3427
3428         crq->cur = 0;
3429         spin_lock_init(&crq->lock);
3430
3431         return retrc;
3432
3433 req_irq_failed:
3434         tasklet_kill(&adapter->tasklet);
3435         do {
3436                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3437         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3438 reg_crq_failed:
3439         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3440 map_failed:
3441         free_page((unsigned long)crq->msgs);
3442         crq->msgs = NULL;
3443         return retrc;
3444 }
3445
3446 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3447 {
3448         struct device *dev = &adapter->vdev->dev;
3449         unsigned long timeout = msecs_to_jiffies(30000);
3450         int rc;
3451
3452         rc = init_crq_queue(adapter);
3453         if (rc) {
3454                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3455                 return rc;
3456         }
3457
3458         init_completion(&adapter->init_done);
3459         ibmvnic_send_crq_init(adapter);
3460         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3461                 dev_err(dev, "Initialization sequence timed out\n");
3462                 release_crq_queue(adapter);
3463                 return -1;
3464         }
3465
3466         rc = init_sub_crqs(adapter);
3467         if (rc) {
3468                 dev_err(dev, "Initialization of sub crqs failed\n");
3469                 release_crq_queue(adapter);
3470         }
3471
3472         return rc;
3473 }
3474
3475 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3476 {
3477         struct ibmvnic_adapter *adapter;
3478         struct net_device *netdev;
3479         unsigned char *mac_addr_p;
3480         int rc;
3481
3482         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3483                 dev->unit_address);
3484
3485         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3486                                                         VETH_MAC_ADDR, NULL);
3487         if (!mac_addr_p) {
3488                 dev_err(&dev->dev,
3489                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3490                         __FILE__, __LINE__);
3491                 return 0;
3492         }
3493
3494         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3495                                    IBMVNIC_MAX_TX_QUEUES);
3496         if (!netdev)
3497                 return -ENOMEM;
3498
3499         adapter = netdev_priv(netdev);
3500         adapter->state = VNIC_PROBING;
3501         dev_set_drvdata(&dev->dev, netdev);
3502         adapter->vdev = dev;
3503         adapter->netdev = netdev;
3504
3505         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3506         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3507         netdev->irq = dev->irq;
3508         netdev->netdev_ops = &ibmvnic_netdev_ops;
3509         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3510         SET_NETDEV_DEV(netdev, &dev->dev);
3511
3512         spin_lock_init(&adapter->stats_lock);
3513
3514         INIT_LIST_HEAD(&adapter->errors);
3515         spin_lock_init(&adapter->error_list_lock);
3516
3517         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3518         INIT_LIST_HEAD(&adapter->rwi_list);
3519         mutex_init(&adapter->reset_lock);
3520         mutex_init(&adapter->rwi_lock);
3521         adapter->resetting = false;
3522
3523         rc = ibmvnic_init(adapter);
3524         if (rc) {
3525                 free_netdev(netdev);
3526                 return rc;
3527         }
3528
3529         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3530
3531         rc = register_netdev(netdev);
3532         if (rc) {
3533                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3534                 free_netdev(netdev);
3535                 return rc;
3536         }
3537         dev_info(&dev->dev, "ibmvnic registered\n");
3538
3539         adapter->state = VNIC_PROBED;
3540         return 0;
3541 }
3542
3543 static int ibmvnic_remove(struct vio_dev *dev)
3544 {
3545         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3546         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3547
3548         adapter->state = VNIC_REMOVING;
3549         unregister_netdev(netdev);
3550         mutex_lock(&adapter->reset_lock);
3551
3552         release_resources(adapter);
3553         release_sub_crqs(adapter);
3554         release_crq_queue(adapter);
3555
3556         adapter->state = VNIC_REMOVED;
3557
3558         mutex_unlock(&adapter->reset_lock);
3559         free_netdev(netdev);
3560         dev_set_drvdata(&dev->dev, NULL);
3561
3562         return 0;
3563 }
3564
3565 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3566 {
3567         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3568         struct ibmvnic_adapter *adapter;
3569         struct iommu_table *tbl;
3570         unsigned long ret = 0;
3571         int i;
3572
3573         tbl = get_iommu_table_base(&vdev->dev);
3574
3575         /* netdev inits at probe time along with the structures we need below*/
3576         if (!netdev)
3577                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3578
3579         adapter = netdev_priv(netdev);
3580
3581         ret += PAGE_SIZE; /* the crq message queue */
3582         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3583
3584         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3585                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3586
3587         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3588              i++)
3589                 ret += adapter->rx_pool[i].size *
3590                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3591
3592         return ret;
3593 }
3594
3595 static int ibmvnic_resume(struct device *dev)
3596 {
3597         struct net_device *netdev = dev_get_drvdata(dev);
3598         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3599         int i;
3600
3601         /* kick the interrupt handlers just in case we lost an interrupt */
3602         for (i = 0; i < adapter->req_rx_queues; i++)
3603                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3604                                      adapter->rx_scrq[i]);
3605
3606         return 0;
3607 }
3608
3609 static struct vio_device_id ibmvnic_device_table[] = {
3610         {"network", "IBM,vnic"},
3611         {"", "" }
3612 };
3613 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3614
3615 static const struct dev_pm_ops ibmvnic_pm_ops = {
3616         .resume = ibmvnic_resume
3617 };
3618
3619 static struct vio_driver ibmvnic_driver = {
3620         .id_table       = ibmvnic_device_table,
3621         .probe          = ibmvnic_probe,
3622         .remove         = ibmvnic_remove,
3623         .get_desired_dma = ibmvnic_get_desired_dma,
3624         .name           = ibmvnic_driver_name,
3625         .pm             = &ibmvnic_pm_ops,
3626 };
3627
3628 /* module functions */
3629 static int __init ibmvnic_module_init(void)
3630 {
3631         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3632                 IBMVNIC_DRIVER_VERSION);
3633
3634         return vio_register_driver(&ibmvnic_driver);
3635 }
3636
3637 static void __exit ibmvnic_module_exit(void)
3638 {
3639         vio_unregister_driver(&ibmvnic_driver);
3640 }
3641
3642 module_init(ibmvnic_module_init);
3643 module_exit(ibmvnic_module_exit);