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 clean_tx_pools(struct ibmvnic_adapter *adapter)
 747 {
 748         struct ibmvnic_tx_pool *tx_pool;
 749         u64 tx_entries;
 750         int tx_scrqs;
 751         int i, j;
 752
 753         if (!adapter->tx_pool)
 754                 return;
 755
 756         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 757         tx_entries = adapter->req_tx_entries_per_subcrq;
 758
 759         /* Free any remaining skbs in the tx buffer pools */
 760         for (i = 0; i < tx_scrqs; i++) {
 761                 tx_pool = &adapter->tx_pool[i];
 762                 if (!tx_pool)
 763                         continue;
 764
 765                 for (j = 0; j < tx_entries; j++) {
 766                         if (tx_pool->tx_buff[j].skb) {
 767                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
 768                                 tx_pool->tx_buff[j].skb = NULL;
 769                         }
 770                 }
 771         }
 772 }
 773
 774 static int __ibmvnic_close(struct net_device *netdev)
 775 {
 776         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 777         int rc = 0;
 778         int i;
 779
 780         adapter->state = VNIC_CLOSING;
 781         netif_tx_stop_all_queues(netdev);
 782
 783         if (adapter->napi) {
 784                 for (i = 0; i < adapter->req_rx_queues; i++)
 785                         napi_disable(&adapter->napi[i]);
 786         }
 787
 788         clean_tx_pools(adapter);
 789
 790         if (adapter->tx_scrq) {
 791                 for (i = 0; i < adapter->req_tx_queues; i++)
 792                         if (adapter->tx_scrq[i]->irq)
 793                                 disable_irq(adapter->tx_scrq[i]->irq);
 794         }
 795
 796         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
 797         if (rc)
 798                 return rc;
 799
 800         if (adapter->rx_scrq) {
 801                 for (i = 0; i < adapter->req_rx_queues; i++) {
 802                         int retries = 10;
 803
 804                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
 805                                 retries--;
 806                                 mdelay(100);
 807
 808                                 if (retries == 0)
 809                                         break;
 810                         }
 811
 812                         if (adapter->rx_scrq[i]->irq)
 813                                 disable_irq(adapter->rx_scrq[i]->irq);
 814                 }
 815         }
 816
 817         adapter->state = VNIC_CLOSED;
 818         return rc;
 819 }
 820
 821 static int ibmvnic_close(struct net_device *netdev)
 822 {
 823         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 824         int rc;
 825
 826         mutex_lock(&adapter->reset_lock);
 827         rc = __ibmvnic_close(netdev);
 828         mutex_unlock(&adapter->reset_lock);
 829
 830         return rc;
 831 }
 832
 833 /**
 834  * build_hdr_data - creates L2/L3/L4 header data buffer
 835  * @hdr_field - bitfield determining needed headers
 836  * @skb - socket buffer
 837  * @hdr_len - array of header lengths
 838  * @tot_len - total length of data
 839  *
 840  * Reads hdr_field to determine which headers are needed by firmware.
 841  * Builds a buffer containing these headers.  Saves individual header
 842  * lengths and total buffer length to be used to build descriptors.
 843  */
 844 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 845                           int *hdr_len, u8 *hdr_data)
 846 {
 847         int len = 0;
 848         u8 *hdr;
 849
 850         hdr_len[0] = sizeof(struct ethhdr);
 851
 852         if (skb->protocol == htons(ETH_P_IP)) {
 853                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 854                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 855                         hdr_len[2] = tcp_hdrlen(skb);
 856                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 857                         hdr_len[2] = sizeof(struct udphdr);
 858         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 859                 hdr_len[1] = sizeof(struct ipv6hdr);
 860                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 861                         hdr_len[2] = tcp_hdrlen(skb);
 862                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 863                         hdr_len[2] = sizeof(struct udphdr);
 864         }
 865
 866         memset(hdr_data, 0, 120);
 867         if ((hdr_field >> 6) & 1) {
 868                 hdr = skb_mac_header(skb);
 869                 memcpy(hdr_data, hdr, hdr_len[0]);
 870                 len += hdr_len[0];
 871         }
 872
 873         if ((hdr_field >> 5) & 1) {
 874                 hdr = skb_network_header(skb);
 875                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 876                 len += hdr_len[1];
 877         }
 878
 879         if ((hdr_field >> 4) & 1) {
 880                 hdr = skb_transport_header(skb);
 881                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 882                 len += hdr_len[2];
 883         }
 884         return len;
 885 }
 886
 887 /**
 888  * create_hdr_descs - create header and header extension descriptors
 889  * @hdr_field - bitfield determining needed headers
 890  * @data - buffer containing header data
 891  * @len - length of data buffer
 892  * @hdr_len - array of individual header lengths
 893  * @scrq_arr - descriptor array
 894  *
 895  * Creates header and, if needed, header extension descriptors and
 896  * places them in a descriptor array, scrq_arr
 897  */
 898
 899 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 900                              union sub_crq *scrq_arr)
 901 {
 902         union sub_crq hdr_desc;
 903         int tmp_len = len;
 904         u8 *data, *cur;
 905         int tmp;
 906
 907         while (tmp_len > 0) {
 908                 cur = hdr_data + len - tmp_len;
 909
 910                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 911                 if (cur != hdr_data) {
 912                         data = hdr_desc.hdr_ext.data;
 913                         tmp = tmp_len > 29 ? 29 : tmp_len;
 914                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 915                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 916                         hdr_desc.hdr_ext.len = tmp;
 917                 } else {
 918                         data = hdr_desc.hdr.data;
 919                         tmp = tmp_len > 24 ? 24 : tmp_len;
 920                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 921                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 922                         hdr_desc.hdr.len = tmp;
 923                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 924                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 925                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 926                         hdr_desc.hdr.flag = hdr_field << 1;
 927                 }
 928                 memcpy(data, cur, tmp);
 929                 tmp_len -= tmp;
 930                 *scrq_arr = hdr_desc;
 931                 scrq_arr++;
 932         }
 933 }
 934
 935 /**
 936  * build_hdr_descs_arr - build a header descriptor array
 937  * @skb - socket buffer
 938  * @num_entries - number of descriptors to be sent
 939  * @subcrq - first TX descriptor
 940  * @hdr_field - bit field determining which headers will be sent
 941  *
 942  * This function will build a TX descriptor array with applicable
 943  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 944  */
 945
 946 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 947                                 int *num_entries, u8 hdr_field)
 948 {
 949         int hdr_len[3] = {0, 0, 0};
 950         int tot_len, len;
 951         u8 *hdr_data = txbuff->hdr_data;
 952
 953         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 954                                  txbuff->hdr_data);
 955         len = tot_len;
 956         len -= 24;
 957         if (len > 0)
 958                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 959         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 960                          txbuff->indir_arr + 1);
 961 }
 962
 963 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 964 {
 965         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 966         int queue_num = skb_get_queue_mapping(skb);
 967         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 968         struct device *dev = &adapter->vdev->dev;
 969         struct ibmvnic_tx_buff *tx_buff = NULL;
 970         struct ibmvnic_sub_crq_queue *tx_scrq;
 971         struct ibmvnic_tx_pool *tx_pool;
 972         unsigned int tx_send_failed = 0;
 973         unsigned int tx_map_failed = 0;
 974         unsigned int tx_dropped = 0;
 975         unsigned int tx_packets = 0;
 976         unsigned int tx_bytes = 0;
 977         dma_addr_t data_dma_addr;
 978         struct netdev_queue *txq;
 979         unsigned long lpar_rc;
 980         union sub_crq tx_crq;
 981         unsigned int offset;
 982         int num_entries = 1;
 983         unsigned char *dst;
 984         u64 *handle_array;
 985         int index = 0;
 986         int ret = 0;
 987
 988         if (adapter->resetting) {
 989                 if (!netif_subqueue_stopped(netdev, skb))
 990                         netif_stop_subqueue(netdev, queue_num);
 991                 dev_kfree_skb_any(skb);
 992
 993                 tx_send_failed++;
 994                 tx_dropped++;
 995                 ret = NETDEV_TX_OK;
 996                 goto out;
 997         }
 998
 999         tx_pool = &adapter->tx_pool[queue_num];
1000         tx_scrq = adapter->tx_scrq[queue_num];
1001         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1002         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1003                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1004
1005         index = tx_pool->free_map[tx_pool->consumer_index];
1006         offset = index * adapter->req_mtu;
1007         dst = tx_pool->long_term_buff.buff + offset;
1008         memset(dst, 0, adapter->req_mtu);
1009         skb_copy_from_linear_data(skb, dst, skb->len);
1010         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1011
1012         tx_pool->consumer_index =
1013             (tx_pool->consumer_index + 1) %
1014                 adapter->req_tx_entries_per_subcrq;
1015
1016         tx_buff = &tx_pool->tx_buff[index];
1017         tx_buff->skb = skb;
1018         tx_buff->data_dma[0] = data_dma_addr;
1019         tx_buff->data_len[0] = skb->len;
1020         tx_buff->index = index;
1021         tx_buff->pool_index = queue_num;
1022         tx_buff->last_frag = true;
1023
1024         memset(&tx_crq, 0, sizeof(tx_crq));
1025         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1026         tx_crq.v1.type = IBMVNIC_TX_DESC;
1027         tx_crq.v1.n_crq_elem = 1;
1028         tx_crq.v1.n_sge = 1;
1029         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1030         tx_crq.v1.correlator = cpu_to_be32(index);
1031         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1032         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1033         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1034
1035         if (adapter->vlan_header_insertion) {
1036                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1037                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1038         }
1039
1040         if (skb->protocol == htons(ETH_P_IP)) {
1041                 if (ip_hdr(skb)->version == 4)
1042                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1043                 else if (ip_hdr(skb)->version == 6)
1044                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1045
1046                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1047                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1048                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1049                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1050         }
1051
1052         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1053                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1054                 hdrs += 2;
1055         }
1056         /* determine if l2/3/4 headers are sent to firmware */
1057         if ((*hdrs >> 7) & 1 &&
1058             (skb->protocol == htons(ETH_P_IP) ||
1059              skb->protocol == htons(ETH_P_IPV6))) {
1060                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1061                 tx_crq.v1.n_crq_elem = num_entries;
1062                 tx_buff->indir_arr[0] = tx_crq;
1063                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1064                                                     sizeof(tx_buff->indir_arr),
1065                                                     DMA_TO_DEVICE);
1066                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1067                         dev_kfree_skb_any(skb);
1068                         tx_buff->skb = NULL;
1069                         if (!firmware_has_feature(FW_FEATURE_CMO))
1070                                 dev_err(dev, "tx: unable to map descriptor array\n");
1071                         tx_map_failed++;
1072                         tx_dropped++;
1073                         ret = NETDEV_TX_OK;
1074                         goto out;
1075                 }
1076                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1077                                                (u64)tx_buff->indir_dma,
1078                                                (u64)num_entries);
1079         } else {
1080                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1081                                       &tx_crq);
1082         }
1083         if (lpar_rc != H_SUCCESS) {
1084                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1085
1086                 if (tx_pool->consumer_index == 0)
1087                         tx_pool->consumer_index =
1088                                 adapter->req_tx_entries_per_subcrq - 1;
1089                 else
1090                         tx_pool->consumer_index--;
1091
1092                 dev_kfree_skb_any(skb);
1093                 tx_buff->skb = NULL;
1094
1095                 if (lpar_rc == H_CLOSED)
1096                         netif_stop_subqueue(netdev, queue_num);
1097
1098                 tx_send_failed++;
1099                 tx_dropped++;
1100                 ret = NETDEV_TX_OK;
1101                 goto out;
1102         }
1103
1104         if (atomic_inc_return(&tx_scrq->used)
1105                                         >= adapter->req_tx_entries_per_subcrq) {
1106                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1107                 netif_stop_subqueue(netdev, queue_num);
1108         }
1109
1110         tx_packets++;
1111         tx_bytes += skb->len;
1112         txq->trans_start = jiffies;
1113         ret = NETDEV_TX_OK;
1114
1115 out:
1116         netdev->stats.tx_dropped += tx_dropped;
1117         netdev->stats.tx_bytes += tx_bytes;
1118         netdev->stats.tx_packets += tx_packets;
1119         adapter->tx_send_failed += tx_send_failed;
1120         adapter->tx_map_failed += tx_map_failed;
1121
1122         return ret;
1123 }
1124
1125 static void ibmvnic_set_multi(struct net_device *netdev)
1126 {
1127         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1128         struct netdev_hw_addr *ha;
1129         union ibmvnic_crq crq;
1130
1131         memset(&crq, 0, sizeof(crq));
1132         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1133         crq.request_capability.cmd = REQUEST_CAPABILITY;
1134
1135         if (netdev->flags & IFF_PROMISC) {
1136                 if (!adapter->promisc_supported)
1137                         return;
1138         } else {
1139                 if (netdev->flags & IFF_ALLMULTI) {
1140                         /* Accept 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_ENABLE_ALL;
1145                         ibmvnic_send_crq(adapter, &crq);
1146                 } else if (netdev_mc_empty(netdev)) {
1147                         /* Reject all multicast */
1148                         memset(&crq, 0, sizeof(crq));
1149                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1150                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1151                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1152                         ibmvnic_send_crq(adapter, &crq);
1153                 } else {
1154                         /* Accept one or more multicast(s) */
1155                         netdev_for_each_mc_addr(ha, netdev) {
1156                                 memset(&crq, 0, sizeof(crq));
1157                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1158                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1159                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1160                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1161                                                 ha->addr);
1162                                 ibmvnic_send_crq(adapter, &crq);
1163                         }
1164                 }
1165         }
1166 }
1167
1168 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1169 {
1170         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1171         struct sockaddr *addr = p;
1172         union ibmvnic_crq crq;
1173
1174         if (!is_valid_ether_addr(addr->sa_data))
1175                 return -EADDRNOTAVAIL;
1176
1177         memset(&crq, 0, sizeof(crq));
1178         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1179         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1180         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1181         ibmvnic_send_crq(adapter, &crq);
1182         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1183         return 0;
1184 }
1185
1186 /**
1187  * do_reset returns zero if we are able to keep processing reset events, or
1188  * non-zero if we hit a fatal error and must halt.
1189  */
1190 static int do_reset(struct ibmvnic_adapter *adapter,
1191                     struct ibmvnic_rwi *rwi, u32 reset_state)
1192 {
1193         struct net_device *netdev = adapter->netdev;
1194         int i, rc;
1195
1196         netif_carrier_off(netdev);
1197         adapter->reset_reason = rwi->reset_reason;
1198
1199         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1200                 rc = ibmvnic_reenable_crq_queue(adapter);
1201                 if (rc)
1202                         return 0;
1203         }
1204
1205         rc = __ibmvnic_close(netdev);
1206         if (rc)
1207                 return rc;
1208
1209         /* remove the closed state so when we call open it appears
1210          * we are coming from the probed state.
1211          */
1212         adapter->state = VNIC_PROBED;
1213
1214         release_resources(adapter);
1215         release_sub_crqs(adapter);
1216         release_crq_queue(adapter);
1217
1218         rc = ibmvnic_init(adapter);
1219         if (rc)
1220                 return 0;
1221
1222         /* If the adapter was in PROBE state prior to the reset, exit here. */
1223         if (reset_state == VNIC_PROBED)
1224                 return 0;
1225
1226         rc = ibmvnic_login(netdev);
1227         if (rc) {
1228                 adapter->state = VNIC_PROBED;
1229                 return 0;
1230         }
1231
1232         rtnl_lock();
1233         rc = init_resources(adapter);
1234         rtnl_unlock();
1235         if (rc)
1236                 return rc;
1237
1238         if (reset_state == VNIC_CLOSED)
1239                 return 0;
1240
1241         rc = __ibmvnic_open(netdev);
1242         if (rc) {
1243                 if (list_empty(&adapter->rwi_list))
1244                         adapter->state = VNIC_CLOSED;
1245                 else
1246                         adapter->state = reset_state;
1247
1248                 return 0;
1249         }
1250
1251         netif_carrier_on(netdev);
1252
1253         /* kick napi */
1254         for (i = 0; i < adapter->req_rx_queues; i++)
1255                 napi_schedule(&adapter->napi[i]);
1256
1257         return 0;
1258 }
1259
1260 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1261 {
1262         struct ibmvnic_rwi *rwi;
1263
1264         mutex_lock(&adapter->rwi_lock);
1265
1266         if (!list_empty(&adapter->rwi_list)) {
1267                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1268                                        list);
1269                 list_del(&rwi->list);
1270         } else {
1271                 rwi = NULL;
1272         }
1273
1274         mutex_unlock(&adapter->rwi_lock);
1275         return rwi;
1276 }
1277
1278 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1279 {
1280         struct ibmvnic_rwi *rwi;
1281
1282         rwi = get_next_rwi(adapter);
1283         while (rwi) {
1284                 kfree(rwi);
1285                 rwi = get_next_rwi(adapter);
1286         }
1287 }
1288
1289 static void __ibmvnic_reset(struct work_struct *work)
1290 {
1291         struct ibmvnic_rwi *rwi;
1292         struct ibmvnic_adapter *adapter;
1293         struct net_device *netdev;
1294         u32 reset_state;
1295         int rc;
1296
1297         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1298         netdev = adapter->netdev;
1299
1300         mutex_lock(&adapter->reset_lock);
1301         adapter->resetting = true;
1302         reset_state = adapter->state;
1303
1304         rwi = get_next_rwi(adapter);
1305         while (rwi) {
1306                 rc = do_reset(adapter, rwi, reset_state);
1307                 kfree(rwi);
1308                 if (rc)
1309                         break;
1310
1311                 rwi = get_next_rwi(adapter);
1312         }
1313
1314         if (rc) {
1315                 free_all_rwi(adapter);
1316                 return;
1317         }
1318
1319         adapter->resetting = false;
1320         mutex_unlock(&adapter->reset_lock);
1321 }
1322
1323 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1324                           enum ibmvnic_reset_reason reason)
1325 {
1326         struct ibmvnic_rwi *rwi, *tmp;
1327         struct net_device *netdev = adapter->netdev;
1328         struct list_head *entry;
1329
1330         if (adapter->state == VNIC_REMOVING ||
1331             adapter->state == VNIC_REMOVED) {
1332                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1333                 return;
1334         }
1335
1336         mutex_lock(&adapter->rwi_lock);
1337
1338         list_for_each(entry, &adapter->rwi_list) {
1339                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1340                 if (tmp->reset_reason == reason) {
1341                         netdev_err(netdev, "Matching reset found, skipping\n");
1342                         mutex_unlock(&adapter->rwi_lock);
1343                         return;
1344                 }
1345         }
1346
1347         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1348         if (!rwi) {
1349                 mutex_unlock(&adapter->rwi_lock);
1350                 ibmvnic_close(netdev);
1351                 return;
1352         }
1353
1354         rwi->reset_reason = reason;
1355         list_add_tail(&rwi->list, &adapter->rwi_list);
1356         mutex_unlock(&adapter->rwi_lock);
1357         schedule_work(&adapter->ibmvnic_reset);
1358 }
1359
1360 static void ibmvnic_tx_timeout(struct net_device *dev)
1361 {
1362         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1363
1364         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1365 }
1366
1367 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1368                                   struct ibmvnic_rx_buff *rx_buff)
1369 {
1370         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1371
1372         rx_buff->skb = NULL;
1373
1374         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1375         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1376
1377         atomic_dec(&pool->available);
1378 }
1379
1380 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1381 {
1382         struct net_device *netdev = napi->dev;
1383         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1384         int scrq_num = (int)(napi - adapter->napi);
1385         int frames_processed = 0;
1386 restart_poll:
1387         while (frames_processed < budget) {
1388                 struct sk_buff *skb;
1389                 struct ibmvnic_rx_buff *rx_buff;
1390                 union sub_crq *next;
1391                 u32 length;
1392                 u16 offset;
1393                 u8 flags = 0;
1394
1395                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1396                         break;
1397                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1398                 rx_buff =
1399                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1400                                                           rx_comp.correlator);
1401                 /* do error checking */
1402                 if (next->rx_comp.rc) {
1403                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1404                         /* free the entry */
1405                         next->rx_comp.first = 0;
1406                         remove_buff_from_pool(adapter, rx_buff);
1407                         continue;
1408                 }
1409
1410                 length = be32_to_cpu(next->rx_comp.len);
1411                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1412                 flags = next->rx_comp.flags;
1413                 skb = rx_buff->skb;
1414                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1415                                         length);
1416
1417                 /* VLAN Header has been stripped by the system firmware and
1418                  * needs to be inserted by the driver
1419                  */
1420                 if (adapter->rx_vlan_header_insertion &&
1421                     (flags & IBMVNIC_VLAN_STRIPPED))
1422                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1423                                                ntohs(next->rx_comp.vlan_tci));
1424
1425                 /* free the entry */
1426                 next->rx_comp.first = 0;
1427                 remove_buff_from_pool(adapter, rx_buff);
1428
1429                 skb_put(skb, length);
1430                 skb->protocol = eth_type_trans(skb, netdev);
1431                 skb_record_rx_queue(skb, scrq_num);
1432
1433                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1434                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1435                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1436                 }
1437
1438                 length = skb->len;
1439                 napi_gro_receive(napi, skb); /* send it up */
1440                 netdev->stats.rx_packets++;
1441                 netdev->stats.rx_bytes += length;
1442                 frames_processed++;
1443         }
1444         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1445
1446         if (frames_processed < budget) {
1447                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1448                 napi_complete_done(napi, frames_processed);
1449                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1450                     napi_reschedule(napi)) {
1451                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1452                         goto restart_poll;
1453                 }
1454         }
1455         return frames_processed;
1456 }
1457
1458 #ifdef CONFIG_NET_POLL_CONTROLLER
1459 static void ibmvnic_netpoll_controller(struct net_device *dev)
1460 {
1461         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1462         int i;
1463
1464         replenish_pools(netdev_priv(dev));
1465         for (i = 0; i < adapter->req_rx_queues; i++)
1466                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1467                                      adapter->rx_scrq[i]);
1468 }
1469 #endif
1470
1471 static const struct net_device_ops ibmvnic_netdev_ops = {
1472         .ndo_open               = ibmvnic_open,
1473         .ndo_stop               = ibmvnic_close,
1474         .ndo_start_xmit         = ibmvnic_xmit,
1475         .ndo_set_rx_mode        = ibmvnic_set_multi,
1476         .ndo_set_mac_address    = ibmvnic_set_mac,
1477         .ndo_validate_addr      = eth_validate_addr,
1478         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1479 #ifdef CONFIG_NET_POLL_CONTROLLER
1480         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1481 #endif
1482 };
1483
1484 /* ethtool functions */
1485
1486 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1487                                       struct ethtool_link_ksettings *cmd)
1488 {
1489         u32 supported, advertising;
1490
1491         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1492                           SUPPORTED_FIBRE);
1493         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1494                             ADVERTISED_FIBRE);
1495         cmd->base.speed = SPEED_1000;
1496         cmd->base.duplex = DUPLEX_FULL;
1497         cmd->base.port = PORT_FIBRE;
1498         cmd->base.phy_address = 0;
1499         cmd->base.autoneg = AUTONEG_ENABLE;
1500
1501         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1502                                                 supported);
1503         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1504                                                 advertising);
1505
1506         return 0;
1507 }
1508
1509 static void ibmvnic_get_drvinfo(struct net_device *dev,
1510                                 struct ethtool_drvinfo *info)
1511 {
1512         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1513         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1514 }
1515
1516 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1517 {
1518         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1519
1520         return adapter->msg_enable;
1521 }
1522
1523 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1524 {
1525         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1526
1527         adapter->msg_enable = data;
1528 }
1529
1530 static u32 ibmvnic_get_link(struct net_device *netdev)
1531 {
1532         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1533
1534         /* Don't need to send a query because we request a logical link up at
1535          * init and then we wait for link state indications
1536          */
1537         return adapter->logical_link_state;
1538 }
1539
1540 static void ibmvnic_get_ringparam(struct net_device *netdev,
1541                                   struct ethtool_ringparam *ring)
1542 {
1543         ring->rx_max_pending = 0;
1544         ring->tx_max_pending = 0;
1545         ring->rx_mini_max_pending = 0;
1546         ring->rx_jumbo_max_pending = 0;
1547         ring->rx_pending = 0;
1548         ring->tx_pending = 0;
1549         ring->rx_mini_pending = 0;
1550         ring->rx_jumbo_pending = 0;
1551 }
1552
1553 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1554 {
1555         int i;
1556
1557         if (stringset != ETH_SS_STATS)
1558                 return;
1559
1560         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1561                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1562 }
1563
1564 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1565 {
1566         switch (sset) {
1567         case ETH_SS_STATS:
1568                 return ARRAY_SIZE(ibmvnic_stats);
1569         default:
1570                 return -EOPNOTSUPP;
1571         }
1572 }
1573
1574 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1575                                       struct ethtool_stats *stats, u64 *data)
1576 {
1577         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1578         union ibmvnic_crq crq;
1579         int i;
1580
1581         memset(&crq, 0, sizeof(crq));
1582         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1583         crq.request_statistics.cmd = REQUEST_STATISTICS;
1584         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1585         crq.request_statistics.len =
1586             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1587
1588         /* Wait for data to be written */
1589         init_completion(&adapter->stats_done);
1590         ibmvnic_send_crq(adapter, &crq);
1591         wait_for_completion(&adapter->stats_done);
1592
1593         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1594                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1595 }
1596
1597 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1598         .get_drvinfo            = ibmvnic_get_drvinfo,
1599         .get_msglevel           = ibmvnic_get_msglevel,
1600         .set_msglevel           = ibmvnic_set_msglevel,
1601         .get_link               = ibmvnic_get_link,
1602         .get_ringparam          = ibmvnic_get_ringparam,
1603         .get_strings            = ibmvnic_get_strings,
1604         .get_sset_count         = ibmvnic_get_sset_count,
1605         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1606         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1607 };
1608
1609 /* Routines for managing CRQs/sCRQs  */
1610
1611 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1612                                   struct ibmvnic_sub_crq_queue *scrq)
1613 {
1614         struct device *dev = &adapter->vdev->dev;
1615         long rc;
1616
1617         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1618
1619         /* Close the sub-crqs */
1620         do {
1621                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1622                                         adapter->vdev->unit_address,
1623                                         scrq->crq_num);
1624         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1625
1626         if (rc) {
1627                 netdev_err(adapter->netdev,
1628                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
1629                            scrq->crq_num, rc);
1630         }
1631
1632         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1633                          DMA_BIDIRECTIONAL);
1634         free_pages((unsigned long)scrq->msgs, 2);
1635         kfree(scrq);
1636 }
1637
1638 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1639                                                         *adapter)
1640 {
1641         struct device *dev = &adapter->vdev->dev;
1642         struct ibmvnic_sub_crq_queue *scrq;
1643         int rc;
1644
1645         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1646         if (!scrq)
1647                 return NULL;
1648
1649         scrq->msgs =
1650                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1651         if (!scrq->msgs) {
1652                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1653                 goto zero_page_failed;
1654         }
1655
1656         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1657                                          DMA_BIDIRECTIONAL);
1658         if (dma_mapping_error(dev, scrq->msg_token)) {
1659                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1660                 goto map_failed;
1661         }
1662
1663         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1664                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1665
1666         if (rc == H_RESOURCE)
1667                 rc = ibmvnic_reset_crq(adapter);
1668
1669         if (rc == H_CLOSED) {
1670                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1671         } else if (rc) {
1672                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1673                 goto reg_failed;
1674         }
1675
1676         scrq->adapter = adapter;
1677         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1678         spin_lock_init(&scrq->lock);
1679
1680         netdev_dbg(adapter->netdev,
1681                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1682                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1683
1684         return scrq;
1685
1686 reg_failed:
1687         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1688                          DMA_BIDIRECTIONAL);
1689 map_failed:
1690         free_pages((unsigned long)scrq->msgs, 2);
1691 zero_page_failed:
1692         kfree(scrq);
1693
1694         return NULL;
1695 }
1696
1697 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1698 {
1699         int i;
1700
1701         if (adapter->tx_scrq) {
1702                 for (i = 0; i < adapter->req_tx_queues; i++) {
1703                         if (!adapter->tx_scrq[i])
1704                                 continue;
1705
1706                         if (adapter->tx_scrq[i]->irq) {
1707                                 free_irq(adapter->tx_scrq[i]->irq,
1708                                          adapter->tx_scrq[i]);
1709                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1710                                 adapter->tx_scrq[i]->irq = 0;
1711                         }
1712
1713                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1714                 }
1715
1716                 kfree(adapter->tx_scrq);
1717                 adapter->tx_scrq = NULL;
1718         }
1719
1720         if (adapter->rx_scrq) {
1721                 for (i = 0; i < adapter->req_rx_queues; i++) {
1722                         if (!adapter->rx_scrq[i])
1723                                 continue;
1724
1725                         if (adapter->rx_scrq[i]->irq) {
1726                                 free_irq(adapter->rx_scrq[i]->irq,
1727                                          adapter->rx_scrq[i]);
1728                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1729                                 adapter->rx_scrq[i]->irq = 0;
1730                         }
1731
1732                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1733                 }
1734
1735                 kfree(adapter->rx_scrq);
1736                 adapter->rx_scrq = NULL;
1737         }
1738 }
1739
1740 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1741                             struct ibmvnic_sub_crq_queue *scrq)
1742 {
1743         struct device *dev = &adapter->vdev->dev;
1744         unsigned long rc;
1745
1746         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1747                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1748         if (rc)
1749                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1750                         scrq->hw_irq, rc);
1751         return rc;
1752 }
1753
1754 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1755                            struct ibmvnic_sub_crq_queue *scrq)
1756 {
1757         struct device *dev = &adapter->vdev->dev;
1758         unsigned long rc;
1759
1760         if (scrq->hw_irq > 0x100000000ULL) {
1761                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1762                 return 1;
1763         }
1764
1765         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1766                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1767         if (rc)
1768                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1769                         scrq->hw_irq, rc);
1770         return rc;
1771 }
1772
1773 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1774                                struct ibmvnic_sub_crq_queue *scrq)
1775 {
1776         struct device *dev = &adapter->vdev->dev;
1777         struct ibmvnic_tx_buff *txbuff;
1778         union sub_crq *next;
1779         int index;
1780         int i, j;
1781         u8 first;
1782
1783 restart_loop:
1784         while (pending_scrq(adapter, scrq)) {
1785                 unsigned int pool = scrq->pool_index;
1786
1787                 next = ibmvnic_next_scrq(adapter, scrq);
1788                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1789                         if (next->tx_comp.rcs[i]) {
1790                                 dev_err(dev, "tx error %x\n",
1791                                         next->tx_comp.rcs[i]);
1792                                 continue;
1793                         }
1794                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1795                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1796
1797                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1798                                 if (!txbuff->data_dma[j])
1799                                         continue;
1800
1801                                 txbuff->data_dma[j] = 0;
1802                         }
1803                         /* if sub_crq was sent indirectly */
1804                         first = txbuff->indir_arr[0].generic.first;
1805                         if (first == IBMVNIC_CRQ_CMD) {
1806                                 dma_unmap_single(dev, txbuff->indir_dma,
1807                                                  sizeof(txbuff->indir_arr),
1808                                                  DMA_TO_DEVICE);
1809                         }
1810
1811                         if (txbuff->last_frag) {
1812                                 if (atomic_sub_return(next->tx_comp.num_comps,
1813                                                       &scrq->used) <=
1814                                     (adapter->req_tx_entries_per_subcrq / 2) &&
1815                                     netif_subqueue_stopped(adapter->netdev,
1816                                                            txbuff->skb)) {
1817                                         netif_wake_subqueue(adapter->netdev,
1818                                                             scrq->pool_index);
1819                                         netdev_dbg(adapter->netdev,
1820                                                    "Started queue %d\n",
1821                                                    scrq->pool_index);
1822                                 }
1823
1824                                 dev_kfree_skb_any(txbuff->skb);
1825                         }
1826
1827                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1828                                                      producer_index] = index;
1829                         adapter->tx_pool[pool].producer_index =
1830                             (adapter->tx_pool[pool].producer_index + 1) %
1831                             adapter->req_tx_entries_per_subcrq;
1832                 }
1833                 /* remove tx_comp scrq*/
1834                 next->tx_comp.first = 0;
1835         }
1836
1837         enable_scrq_irq(adapter, scrq);
1838
1839         if (pending_scrq(adapter, scrq)) {
1840                 disable_scrq_irq(adapter, scrq);
1841                 goto restart_loop;
1842         }
1843
1844         return 0;
1845 }
1846
1847 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1848 {
1849         struct ibmvnic_sub_crq_queue *scrq = instance;
1850         struct ibmvnic_adapter *adapter = scrq->adapter;
1851
1852         disable_scrq_irq(adapter, scrq);
1853         ibmvnic_complete_tx(adapter, scrq);
1854
1855         return IRQ_HANDLED;
1856 }
1857
1858 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1859 {
1860         struct ibmvnic_sub_crq_queue *scrq = instance;
1861         struct ibmvnic_adapter *adapter = scrq->adapter;
1862
1863         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1864                 disable_scrq_irq(adapter, scrq);
1865                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1866         }
1867
1868         return IRQ_HANDLED;
1869 }
1870
1871 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1872 {
1873         struct device *dev = &adapter->vdev->dev;
1874         struct ibmvnic_sub_crq_queue *scrq;
1875         int i = 0, j = 0;
1876         int rc = 0;
1877
1878         for (i = 0; i < adapter->req_tx_queues; i++) {
1879                 scrq = adapter->tx_scrq[i];
1880                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1881
1882                 if (!scrq->irq) {
1883                         rc = -EINVAL;
1884                         dev_err(dev, "Error mapping irq\n");
1885                         goto req_tx_irq_failed;
1886                 }
1887
1888                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1889                                  0, "ibmvnic_tx", scrq);
1890
1891                 if (rc) {
1892                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1893                                 scrq->irq, rc);
1894                         irq_dispose_mapping(scrq->irq);
1895                         goto req_rx_irq_failed;
1896                 }
1897         }
1898
1899         for (i = 0; i < adapter->req_rx_queues; i++) {
1900                 scrq = adapter->rx_scrq[i];
1901                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1902                 if (!scrq->irq) {
1903                         rc = -EINVAL;
1904                         dev_err(dev, "Error mapping irq\n");
1905                         goto req_rx_irq_failed;
1906                 }
1907                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1908                                  0, "ibmvnic_rx", scrq);
1909                 if (rc) {
1910                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1911                                 scrq->irq, rc);
1912                         irq_dispose_mapping(scrq->irq);
1913                         goto req_rx_irq_failed;
1914                 }
1915         }
1916         return rc;
1917
1918 req_rx_irq_failed:
1919         for (j = 0; j < i; j++) {
1920                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1921                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1922         }
1923         i = adapter->req_tx_queues;
1924 req_tx_irq_failed:
1925         for (j = 0; j < i; j++) {
1926                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1927                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1928         }
1929         release_sub_crqs(adapter);
1930         return rc;
1931 }
1932
1933 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
1934 {
1935         struct device *dev = &adapter->vdev->dev;
1936         struct ibmvnic_sub_crq_queue **allqueues;
1937         int registered_queues = 0;
1938         int total_queues;
1939         int more = 0;
1940         int i;
1941
1942         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1943
1944         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
1945         if (!allqueues)
1946                 return -1;
1947
1948         for (i = 0; i < total_queues; i++) {
1949                 allqueues[i] = init_sub_crq_queue(adapter);
1950                 if (!allqueues[i]) {
1951                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1952                         break;
1953                 }
1954                 registered_queues++;
1955         }
1956
1957         /* Make sure we were able to register the minimum number of queues */
1958         if (registered_queues <
1959             adapter->min_tx_queues + adapter->min_rx_queues) {
1960                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1961                 goto tx_failed;
1962         }
1963
1964         /* Distribute the failed allocated queues*/
1965         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1966                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1967                 switch (i % 3) {
1968                 case 0:
1969                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1970                                 adapter->req_rx_queues--;
1971                         else
1972                                 more++;
1973                         break;
1974                 case 1:
1975                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1976                                 adapter->req_tx_queues--;
1977                         else
1978                                 more++;
1979                         break;
1980                 }
1981         }
1982
1983         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1984                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
1985         if (!adapter->tx_scrq)
1986                 goto tx_failed;
1987
1988         for (i = 0; i < adapter->req_tx_queues; i++) {
1989                 adapter->tx_scrq[i] = allqueues[i];
1990                 adapter->tx_scrq[i]->pool_index = i;
1991         }
1992
1993         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1994                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
1995         if (!adapter->rx_scrq)
1996                 goto rx_failed;
1997
1998         for (i = 0; i < adapter->req_rx_queues; i++) {
1999                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2000                 adapter->rx_scrq[i]->scrq_num = i;
2001         }
2002
2003         kfree(allqueues);
2004         return 0;
2005
2006 rx_failed:
2007         kfree(adapter->tx_scrq);
2008         adapter->tx_scrq = NULL;
2009 tx_failed:
2010         for (i = 0; i < registered_queues; i++)
2011                 release_sub_crq_queue(adapter, allqueues[i]);
2012         kfree(allqueues);
2013         return -1;
2014 }
2015
2016 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2017 {
2018         struct device *dev = &adapter->vdev->dev;
2019         union ibmvnic_crq crq;
2020
2021         if (!retry) {
2022                 /* Sub-CRQ entries are 32 byte long */
2023                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2024
2025                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2026                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2027                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2028                         return;
2029                 }
2030
2031                 /* Get the minimum between the queried max and the entries
2032                  * that fit in our PAGE_SIZE
2033                  */
2034                 adapter->req_tx_entries_per_subcrq =
2035                     adapter->max_tx_entries_per_subcrq > entries_page ?
2036                     entries_page : adapter->max_tx_entries_per_subcrq;
2037                 adapter->req_rx_add_entries_per_subcrq =
2038                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
2039                     entries_page : adapter->max_rx_add_entries_per_subcrq;
2040
2041                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2042                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2043                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2044
2045                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2046         }
2047
2048         memset(&crq, 0, sizeof(crq));
2049         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2050         crq.request_capability.cmd = REQUEST_CAPABILITY;
2051
2052         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2053         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2054         atomic_inc(&adapter->running_cap_crqs);
2055         ibmvnic_send_crq(adapter, &crq);
2056
2057         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2058         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2059         atomic_inc(&adapter->running_cap_crqs);
2060         ibmvnic_send_crq(adapter, &crq);
2061
2062         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2063         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2064         atomic_inc(&adapter->running_cap_crqs);
2065         ibmvnic_send_crq(adapter, &crq);
2066
2067         crq.request_capability.capability =
2068             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2069         crq.request_capability.number =
2070             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2071         atomic_inc(&adapter->running_cap_crqs);
2072         ibmvnic_send_crq(adapter, &crq);
2073
2074         crq.request_capability.capability =
2075             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2076         crq.request_capability.number =
2077             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2078         atomic_inc(&adapter->running_cap_crqs);
2079         ibmvnic_send_crq(adapter, &crq);
2080
2081         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2082         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2083         atomic_inc(&adapter->running_cap_crqs);
2084         ibmvnic_send_crq(adapter, &crq);
2085
2086         if (adapter->netdev->flags & IFF_PROMISC) {
2087                 if (adapter->promisc_supported) {
2088                         crq.request_capability.capability =
2089                             cpu_to_be16(PROMISC_REQUESTED);
2090                         crq.request_capability.number = cpu_to_be64(1);
2091                         atomic_inc(&adapter->running_cap_crqs);
2092                         ibmvnic_send_crq(adapter, &crq);
2093                 }
2094         } else {
2095                 crq.request_capability.capability =
2096                     cpu_to_be16(PROMISC_REQUESTED);
2097                 crq.request_capability.number = cpu_to_be64(0);
2098                 atomic_inc(&adapter->running_cap_crqs);
2099                 ibmvnic_send_crq(adapter, &crq);
2100         }
2101 }
2102
2103 static int pending_scrq(struct ibmvnic_adapter *adapter,
2104                         struct ibmvnic_sub_crq_queue *scrq)
2105 {
2106         union sub_crq *entry = &scrq->msgs[scrq->cur];
2107
2108         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2109             adapter->state == VNIC_CLOSING)
2110                 return 1;
2111         else
2112                 return 0;
2113 }
2114
2115 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2116                                         struct ibmvnic_sub_crq_queue *scrq)
2117 {
2118         union sub_crq *entry;
2119         unsigned long flags;
2120
2121         spin_lock_irqsave(&scrq->lock, flags);
2122         entry = &scrq->msgs[scrq->cur];
2123         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2124                 if (++scrq->cur == scrq->size)
2125                         scrq->cur = 0;
2126         } else {
2127                 entry = NULL;
2128         }
2129         spin_unlock_irqrestore(&scrq->lock, flags);
2130
2131         return entry;
2132 }
2133
2134 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2135 {
2136         struct ibmvnic_crq_queue *queue = &adapter->crq;
2137         union ibmvnic_crq *crq;
2138
2139         crq = &queue->msgs[queue->cur];
2140         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2141                 if (++queue->cur == queue->size)
2142                         queue->cur = 0;
2143         } else {
2144                 crq = NULL;
2145         }
2146
2147         return crq;
2148 }
2149
2150 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2151                        union sub_crq *sub_crq)
2152 {
2153         unsigned int ua = adapter->vdev->unit_address;
2154         struct device *dev = &adapter->vdev->dev;
2155         u64 *u64_crq = (u64 *)sub_crq;
2156         int rc;
2157
2158         netdev_dbg(adapter->netdev,
2159                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2160                    (unsigned long int)cpu_to_be64(remote_handle),
2161                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2162                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2163                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2164                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2165
2166         /* Make sure the hypervisor sees the complete request */
2167         mb();
2168
2169         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2170                                 cpu_to_be64(remote_handle),
2171                                 cpu_to_be64(u64_crq[0]),
2172                                 cpu_to_be64(u64_crq[1]),
2173                                 cpu_to_be64(u64_crq[2]),
2174                                 cpu_to_be64(u64_crq[3]));
2175
2176         if (rc) {
2177                 if (rc == H_CLOSED)
2178                         dev_warn(dev, "CRQ Queue closed\n");
2179                 dev_err(dev, "Send error (rc=%d)\n", rc);
2180         }
2181
2182         return rc;
2183 }
2184
2185 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2186                                 u64 remote_handle, u64 ioba, u64 num_entries)
2187 {
2188         unsigned int ua = adapter->vdev->unit_address;
2189         struct device *dev = &adapter->vdev->dev;
2190         int rc;
2191
2192         /* Make sure the hypervisor sees the complete request */
2193         mb();
2194         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2195                                 cpu_to_be64(remote_handle),
2196                                 ioba, num_entries);
2197
2198         if (rc) {
2199                 if (rc == H_CLOSED)
2200                         dev_warn(dev, "CRQ Queue closed\n");
2201                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2202         }
2203
2204         return rc;
2205 }
2206
2207 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2208                             union ibmvnic_crq *crq)
2209 {
2210         unsigned int ua = adapter->vdev->unit_address;
2211         struct device *dev = &adapter->vdev->dev;
2212         u64 *u64_crq = (u64 *)crq;
2213         int rc;
2214
2215         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2216                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2217                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2218
2219         /* Make sure the hypervisor sees the complete request */
2220         mb();
2221
2222         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2223                                 cpu_to_be64(u64_crq[0]),
2224                                 cpu_to_be64(u64_crq[1]));
2225
2226         if (rc) {
2227                 if (rc == H_CLOSED)
2228                         dev_warn(dev, "CRQ Queue closed\n");
2229                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2230         }
2231
2232         return rc;
2233 }
2234
2235 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2236 {
2237         union ibmvnic_crq crq;
2238
2239         memset(&crq, 0, sizeof(crq));
2240         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2241         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2242         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2243
2244         return ibmvnic_send_crq(adapter, &crq);
2245 }
2246
2247 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2248 {
2249         union ibmvnic_crq crq;
2250
2251         memset(&crq, 0, sizeof(crq));
2252         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2253         crq.version_exchange.cmd = VERSION_EXCHANGE;
2254         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2255
2256         return ibmvnic_send_crq(adapter, &crq);
2257 }
2258
2259 static void send_login(struct ibmvnic_adapter *adapter)
2260 {
2261         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2262         struct ibmvnic_login_buffer *login_buffer;
2263         struct device *dev = &adapter->vdev->dev;
2264         dma_addr_t rsp_buffer_token;
2265         dma_addr_t buffer_token;
2266         size_t rsp_buffer_size;
2267         union ibmvnic_crq crq;
2268         size_t buffer_size;
2269         __be64 *tx_list_p;
2270         __be64 *rx_list_p;
2271         int i;
2272
2273         buffer_size =
2274             sizeof(struct ibmvnic_login_buffer) +
2275             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2276
2277         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2278         if (!login_buffer)
2279                 goto buf_alloc_failed;
2280
2281         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2282                                       DMA_TO_DEVICE);
2283         if (dma_mapping_error(dev, buffer_token)) {
2284                 dev_err(dev, "Couldn't map login buffer\n");
2285                 goto buf_map_failed;
2286         }
2287
2288         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2289                           sizeof(u64) * adapter->req_tx_queues +
2290                           sizeof(u64) * adapter->req_rx_queues +
2291                           sizeof(u64) * adapter->req_rx_queues +
2292                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2293
2294         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2295         if (!login_rsp_buffer)
2296                 goto buf_rsp_alloc_failed;
2297
2298         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2299                                           rsp_buffer_size, DMA_FROM_DEVICE);
2300         if (dma_mapping_error(dev, rsp_buffer_token)) {
2301                 dev_err(dev, "Couldn't map login rsp buffer\n");
2302                 goto buf_rsp_map_failed;
2303         }
2304
2305         adapter->login_buf = login_buffer;
2306         adapter->login_buf_token = buffer_token;
2307         adapter->login_buf_sz = buffer_size;
2308         adapter->login_rsp_buf = login_rsp_buffer;
2309         adapter->login_rsp_buf_token = rsp_buffer_token;
2310         adapter->login_rsp_buf_sz = rsp_buffer_size;
2311
2312         login_buffer->len = cpu_to_be32(buffer_size);
2313         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2314         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2315         login_buffer->off_txcomp_subcrqs =
2316             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2317         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2318         login_buffer->off_rxcomp_subcrqs =
2319             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2320                         sizeof(u64) * adapter->req_tx_queues);
2321         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2322         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2323
2324         tx_list_p = (__be64 *)((char *)login_buffer +
2325                                       sizeof(struct ibmvnic_login_buffer));
2326         rx_list_p = (__be64 *)((char *)login_buffer +
2327                                       sizeof(struct ibmvnic_login_buffer) +
2328                                       sizeof(u64) * adapter->req_tx_queues);
2329
2330         for (i = 0; i < adapter->req_tx_queues; i++) {
2331                 if (adapter->tx_scrq[i]) {
2332                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2333                                                    crq_num);
2334                 }
2335         }
2336
2337         for (i = 0; i < adapter->req_rx_queues; i++) {
2338                 if (adapter->rx_scrq[i]) {
2339                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2340                                                    crq_num);
2341                 }
2342         }
2343
2344         netdev_dbg(adapter->netdev, "Login Buffer:\n");
2345         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2346                 netdev_dbg(adapter->netdev, "%016lx\n",
2347                            ((unsigned long int *)(adapter->login_buf))[i]);
2348         }
2349
2350         memset(&crq, 0, sizeof(crq));
2351         crq.login.first = IBMVNIC_CRQ_CMD;
2352         crq.login.cmd = LOGIN;
2353         crq.login.ioba = cpu_to_be32(buffer_token);
2354         crq.login.len = cpu_to_be32(buffer_size);
2355         ibmvnic_send_crq(adapter, &crq);
2356
2357         return;
2358
2359 buf_rsp_map_failed:
2360         kfree(login_rsp_buffer);
2361 buf_rsp_alloc_failed:
2362         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2363 buf_map_failed:
2364         kfree(login_buffer);
2365 buf_alloc_failed:
2366         return;
2367 }
2368
2369 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2370                              u32 len, u8 map_id)
2371 {
2372         union ibmvnic_crq crq;
2373
2374         memset(&crq, 0, sizeof(crq));
2375         crq.request_map.first = IBMVNIC_CRQ_CMD;
2376         crq.request_map.cmd = REQUEST_MAP;
2377         crq.request_map.map_id = map_id;
2378         crq.request_map.ioba = cpu_to_be32(addr);
2379         crq.request_map.len = cpu_to_be32(len);
2380         ibmvnic_send_crq(adapter, &crq);
2381 }
2382
2383 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2384 {
2385         union ibmvnic_crq crq;
2386
2387         memset(&crq, 0, sizeof(crq));
2388         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2389         crq.request_unmap.cmd = REQUEST_UNMAP;
2390         crq.request_unmap.map_id = map_id;
2391         ibmvnic_send_crq(adapter, &crq);
2392 }
2393
2394 static void send_map_query(struct ibmvnic_adapter *adapter)
2395 {
2396         union ibmvnic_crq crq;
2397
2398         memset(&crq, 0, sizeof(crq));
2399         crq.query_map.first = IBMVNIC_CRQ_CMD;
2400         crq.query_map.cmd = QUERY_MAP;
2401         ibmvnic_send_crq(adapter, &crq);
2402 }
2403
2404 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2405 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2406 {
2407         union ibmvnic_crq crq;
2408
2409         atomic_set(&adapter->running_cap_crqs, 0);
2410         memset(&crq, 0, sizeof(crq));
2411         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2412         crq.query_capability.cmd = QUERY_CAPABILITY;
2413
2414         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2415         atomic_inc(&adapter->running_cap_crqs);
2416         ibmvnic_send_crq(adapter, &crq);
2417
2418         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2419         atomic_inc(&adapter->running_cap_crqs);
2420         ibmvnic_send_crq(adapter, &crq);
2421
2422         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2423         atomic_inc(&adapter->running_cap_crqs);
2424         ibmvnic_send_crq(adapter, &crq);
2425
2426         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2427         atomic_inc(&adapter->running_cap_crqs);
2428         ibmvnic_send_crq(adapter, &crq);
2429
2430         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2431         atomic_inc(&adapter->running_cap_crqs);
2432         ibmvnic_send_crq(adapter, &crq);
2433
2434         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2435         atomic_inc(&adapter->running_cap_crqs);
2436         ibmvnic_send_crq(adapter, &crq);
2437
2438         crq.query_capability.capability =
2439             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2440         atomic_inc(&adapter->running_cap_crqs);
2441         ibmvnic_send_crq(adapter, &crq);
2442
2443         crq.query_capability.capability =
2444             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2445         atomic_inc(&adapter->running_cap_crqs);
2446         ibmvnic_send_crq(adapter, &crq);
2447
2448         crq.query_capability.capability =
2449             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2450         atomic_inc(&adapter->running_cap_crqs);
2451         ibmvnic_send_crq(adapter, &crq);
2452
2453         crq.query_capability.capability =
2454             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2455         atomic_inc(&adapter->running_cap_crqs);
2456         ibmvnic_send_crq(adapter, &crq);
2457
2458         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2459         atomic_inc(&adapter->running_cap_crqs);
2460         ibmvnic_send_crq(adapter, &crq);
2461
2462         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2463         atomic_inc(&adapter->running_cap_crqs);
2464         ibmvnic_send_crq(adapter, &crq);
2465
2466         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2467         atomic_inc(&adapter->running_cap_crqs);
2468         ibmvnic_send_crq(adapter, &crq);
2469
2470         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2471         atomic_inc(&adapter->running_cap_crqs);
2472         ibmvnic_send_crq(adapter, &crq);
2473
2474         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2475         atomic_inc(&adapter->running_cap_crqs);
2476         ibmvnic_send_crq(adapter, &crq);
2477
2478         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2479         atomic_inc(&adapter->running_cap_crqs);
2480         ibmvnic_send_crq(adapter, &crq);
2481
2482         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2483         atomic_inc(&adapter->running_cap_crqs);
2484         ibmvnic_send_crq(adapter, &crq);
2485
2486         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2487         atomic_inc(&adapter->running_cap_crqs);
2488         ibmvnic_send_crq(adapter, &crq);
2489
2490         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2491         atomic_inc(&adapter->running_cap_crqs);
2492         ibmvnic_send_crq(adapter, &crq);
2493
2494         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2495         atomic_inc(&adapter->running_cap_crqs);
2496         ibmvnic_send_crq(adapter, &crq);
2497
2498         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2499         atomic_inc(&adapter->running_cap_crqs);
2500         ibmvnic_send_crq(adapter, &crq);
2501
2502         crq.query_capability.capability =
2503                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2504         atomic_inc(&adapter->running_cap_crqs);
2505         ibmvnic_send_crq(adapter, &crq);
2506
2507         crq.query_capability.capability =
2508                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2509         atomic_inc(&adapter->running_cap_crqs);
2510         ibmvnic_send_crq(adapter, &crq);
2511
2512         crq.query_capability.capability =
2513                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2514         atomic_inc(&adapter->running_cap_crqs);
2515         ibmvnic_send_crq(adapter, &crq);
2516
2517         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2518         atomic_inc(&adapter->running_cap_crqs);
2519         ibmvnic_send_crq(adapter, &crq);
2520 }
2521
2522 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2523 {
2524         struct device *dev = &adapter->vdev->dev;
2525         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2526         union ibmvnic_crq crq;
2527         int i;
2528
2529         dma_unmap_single(dev, adapter->ip_offload_tok,
2530                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2531
2532         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2533         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2534                 netdev_dbg(adapter->netdev, "%016lx\n",
2535                            ((unsigned long int *)(buf))[i]);
2536
2537         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2538         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2539         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2540                    buf->tcp_ipv4_chksum);
2541         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2542                    buf->tcp_ipv6_chksum);
2543         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2544                    buf->udp_ipv4_chksum);
2545         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2546                    buf->udp_ipv6_chksum);
2547         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2548                    buf->large_tx_ipv4);
2549         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2550                    buf->large_tx_ipv6);
2551         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2552                    buf->large_rx_ipv4);
2553         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2554                    buf->large_rx_ipv6);
2555         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2556                    buf->max_ipv4_header_size);
2557         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2558                    buf->max_ipv6_header_size);
2559         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2560                    buf->max_tcp_header_size);
2561         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2562                    buf->max_udp_header_size);
2563         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2564                    buf->max_large_tx_size);
2565         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2566                    buf->max_large_rx_size);
2567         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2568                    buf->ipv6_extension_header);
2569         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2570                    buf->tcp_pseudosum_req);
2571         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2572                    buf->num_ipv6_ext_headers);
2573         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2574                    buf->off_ipv6_ext_headers);
2575
2576         adapter->ip_offload_ctrl_tok =
2577             dma_map_single(dev, &adapter->ip_offload_ctrl,
2578                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2579
2580         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2581                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2582                 return;
2583         }
2584
2585         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2586         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2587         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2588         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2589         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2590
2591         /* large_tx/rx disabled for now, additional features needed */
2592         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2593         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2594         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2595         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2596
2597         adapter->netdev->features = NETIF_F_GSO;
2598
2599         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2600                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2601
2602         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2603                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2604
2605         if ((adapter->netdev->features &
2606             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2607                 adapter->netdev->features |= NETIF_F_RXCSUM;
2608
2609         memset(&crq, 0, sizeof(crq));
2610         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2611         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2612         crq.control_ip_offload.len =
2613             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2614         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2615         ibmvnic_send_crq(adapter, &crq);
2616 }
2617
2618 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2619                                   struct ibmvnic_adapter *adapter)
2620 {
2621         struct device *dev = &adapter->vdev->dev;
2622         struct ibmvnic_error_buff *error_buff, *tmp;
2623         unsigned long flags;
2624         bool found = false;
2625         int i;
2626
2627         if (!crq->request_error_rsp.rc.code) {
2628                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2629                          crq->request_error_rsp.rc.code);
2630                 return;
2631         }
2632
2633         spin_lock_irqsave(&adapter->error_list_lock, flags);
2634         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2635                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2636                         found = true;
2637                         list_del(&error_buff->list);
2638                         break;
2639                 }
2640         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2641
2642         if (!found) {
2643                 dev_err(dev, "Couldn't find error id %x\n",
2644                         be32_to_cpu(crq->request_error_rsp.error_id));
2645                 return;
2646         }
2647
2648         dev_err(dev, "Detailed info for error id %x:",
2649                 be32_to_cpu(crq->request_error_rsp.error_id));
2650
2651         for (i = 0; i < error_buff->len; i++) {
2652                 pr_cont("%02x", (int)error_buff->buff[i]);
2653                 if (i % 8 == 7)
2654                         pr_cont(" ");
2655         }
2656         pr_cont("\n");
2657
2658         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2659                          DMA_FROM_DEVICE);
2660         kfree(error_buff->buff);
2661         kfree(error_buff);
2662 }
2663
2664 static void request_error_information(struct ibmvnic_adapter *adapter,
2665                                       union ibmvnic_crq *err_crq)
2666 {
2667         struct device *dev = &adapter->vdev->dev;
2668         struct net_device *netdev = adapter->netdev;
2669         struct ibmvnic_error_buff *error_buff;
2670         unsigned long timeout = msecs_to_jiffies(30000);
2671         union ibmvnic_crq crq;
2672         unsigned long flags;
2673         int rc, detail_len;
2674
2675         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2676         if (!error_buff)
2677                 return;
2678
2679         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2680         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2681         if (!error_buff->buff) {
2682                 kfree(error_buff);
2683                 return;
2684         }
2685
2686         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2687                                          DMA_FROM_DEVICE);
2688         if (dma_mapping_error(dev, error_buff->dma)) {
2689                 netdev_err(netdev, "Couldn't map error buffer\n");
2690                 kfree(error_buff->buff);
2691                 kfree(error_buff);
2692                 return;
2693         }
2694
2695         error_buff->len = detail_len;
2696         error_buff->error_id = err_crq->error_indication.error_id;
2697
2698         spin_lock_irqsave(&adapter->error_list_lock, flags);
2699         list_add_tail(&error_buff->list, &adapter->errors);
2700         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2701
2702         memset(&crq, 0, sizeof(crq));
2703         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2704         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2705         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2706         crq.request_error_info.len = cpu_to_be32(detail_len);
2707         crq.request_error_info.error_id = err_crq->error_indication.error_id;
2708
2709         rc = ibmvnic_send_crq(adapter, &crq);
2710         if (rc) {
2711                 netdev_err(netdev, "failed to request error information\n");
2712                 goto err_info_fail;
2713         }
2714
2715         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2716                 netdev_err(netdev, "timeout waiting for error information\n");
2717                 goto err_info_fail;
2718         }
2719
2720         return;
2721
2722 err_info_fail:
2723         spin_lock_irqsave(&adapter->error_list_lock, flags);
2724         list_del(&error_buff->list);
2725         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2726
2727         kfree(error_buff->buff);
2728         kfree(error_buff);
2729 }
2730
2731 static void handle_error_indication(union ibmvnic_crq *crq,
2732                                     struct ibmvnic_adapter *adapter)
2733 {
2734         struct device *dev = &adapter->vdev->dev;
2735
2736         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2737                 crq->error_indication.flags
2738                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2739                 be32_to_cpu(crq->error_indication.error_id),
2740                 be16_to_cpu(crq->error_indication.error_cause));
2741
2742         if (be32_to_cpu(crq->error_indication.error_id))
2743                 request_error_information(adapter, crq);
2744
2745         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2746                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2747 }
2748
2749 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2750                                   struct ibmvnic_adapter *adapter)
2751 {
2752         struct net_device *netdev = adapter->netdev;
2753         struct device *dev = &adapter->vdev->dev;
2754         long rc;
2755
2756         rc = crq->change_mac_addr_rsp.rc.code;
2757         if (rc) {
2758                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2759                 return;
2760         }
2761         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2762                ETH_ALEN);
2763 }
2764
2765 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2766                                    struct ibmvnic_adapter *adapter)
2767 {
2768         struct device *dev = &adapter->vdev->dev;
2769         u64 *req_value;
2770         char *name;
2771
2772         atomic_dec(&adapter->running_cap_crqs);
2773         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2774         case REQ_TX_QUEUES:
2775                 req_value = &adapter->req_tx_queues;
2776                 name = "tx";
2777                 break;
2778         case REQ_RX_QUEUES:
2779                 req_value = &adapter->req_rx_queues;
2780                 name = "rx";
2781                 break;
2782         case REQ_RX_ADD_QUEUES:
2783                 req_value = &adapter->req_rx_add_queues;
2784                 name = "rx_add";
2785                 break;
2786         case REQ_TX_ENTRIES_PER_SUBCRQ:
2787                 req_value = &adapter->req_tx_entries_per_subcrq;
2788                 name = "tx_entries_per_subcrq";
2789                 break;
2790         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2791                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2792                 name = "rx_add_entries_per_subcrq";
2793                 break;
2794         case REQ_MTU:
2795                 req_value = &adapter->req_mtu;
2796                 name = "mtu";
2797                 break;
2798         case PROMISC_REQUESTED:
2799                 req_value = &adapter->promisc;
2800                 name = "promisc";
2801                 break;
2802         default:
2803                 dev_err(dev, "Got invalid cap request rsp %d\n",
2804                         crq->request_capability.capability);
2805                 return;
2806         }
2807
2808         switch (crq->request_capability_rsp.rc.code) {
2809         case SUCCESS:
2810                 break;
2811         case PARTIALSUCCESS:
2812                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2813                          *req_value,
2814                          (long int)be64_to_cpu(crq->request_capability_rsp.
2815                                                number), name);
2816                 release_sub_crqs(adapter);
2817                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2818                 ibmvnic_send_req_caps(adapter, 1);
2819                 return;
2820         default:
2821                 dev_err(dev, "Error %d in request cap rsp\n",
2822                         crq->request_capability_rsp.rc.code);
2823                 return;
2824         }
2825
2826         /* Done receiving requested capabilities, query IP offload support */
2827         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2828                 union ibmvnic_crq newcrq;
2829                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2830                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2831                     &adapter->ip_offload_buf;
2832
2833                 adapter->wait_capability = false;
2834                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2835                                                          buf_sz,
2836                                                          DMA_FROM_DEVICE);
2837
2838                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2839                         if (!firmware_has_feature(FW_FEATURE_CMO))
2840                                 dev_err(dev, "Couldn't map offload buffer\n");
2841                         return;
2842                 }
2843
2844                 memset(&newcrq, 0, sizeof(newcrq));
2845                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2846                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2847                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2848                 newcrq.query_ip_offload.ioba =
2849                     cpu_to_be32(adapter->ip_offload_tok);
2850
2851                 ibmvnic_send_crq(adapter, &newcrq);
2852         }
2853 }
2854
2855 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2856                             struct ibmvnic_adapter *adapter)
2857 {
2858         struct device *dev = &adapter->vdev->dev;
2859         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2860         struct ibmvnic_login_buffer *login = adapter->login_buf;
2861         int i;
2862
2863         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2864                          DMA_BIDIRECTIONAL);
2865         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2866                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2867
2868         /* If the number of queues requested can't be allocated by the
2869          * server, the login response will return with code 1. We will need
2870          * to resend the login buffer with fewer queues requested.
2871          */
2872         if (login_rsp_crq->generic.rc.code) {
2873                 adapter->renegotiate = true;
2874                 complete(&adapter->init_done);
2875                 return 0;
2876         }
2877
2878         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2879         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2880                 netdev_dbg(adapter->netdev, "%016lx\n",
2881                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2882         }
2883
2884         /* Sanity checks */
2885         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2886             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2887              adapter->req_rx_add_queues !=
2888              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2889                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2890                 ibmvnic_remove(adapter->vdev);
2891                 return -EIO;
2892         }
2893         complete(&adapter->init_done);
2894
2895         return 0;
2896 }
2897
2898 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2899                                    struct ibmvnic_adapter *adapter)
2900 {
2901         struct device *dev = &adapter->vdev->dev;
2902         u8 map_id = crq->request_map_rsp.map_id;
2903         int tx_subcrqs;
2904         int rx_subcrqs;
2905         long rc;
2906         int i;
2907
2908         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2909         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2910
2911         rc = crq->request_map_rsp.rc.code;
2912         if (rc) {
2913                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2914                 adapter->map_id--;
2915                 /* need to find and zero tx/rx_pool map_id */
2916                 for (i = 0; i < tx_subcrqs; i++) {
2917                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2918                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2919                 }
2920                 for (i = 0; i < rx_subcrqs; i++) {
2921                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2922                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2923                 }
2924         }
2925         complete(&adapter->fw_done);
2926 }
2927
2928 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2929                                      struct ibmvnic_adapter *adapter)
2930 {
2931         struct device *dev = &adapter->vdev->dev;
2932         long rc;
2933
2934         rc = crq->request_unmap_rsp.rc.code;
2935         if (rc)
2936                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2937 }
2938
2939 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2940                                  struct ibmvnic_adapter *adapter)
2941 {
2942         struct net_device *netdev = adapter->netdev;
2943         struct device *dev = &adapter->vdev->dev;
2944         long rc;
2945
2946         rc = crq->query_map_rsp.rc.code;
2947         if (rc) {
2948                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2949                 return;
2950         }
2951         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2952                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2953                    crq->query_map_rsp.free_pages);
2954 }
2955
2956 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2957                                  struct ibmvnic_adapter *adapter)
2958 {
2959         struct net_device *netdev = adapter->netdev;
2960         struct device *dev = &adapter->vdev->dev;
2961         long rc;
2962
2963         atomic_dec(&adapter->running_cap_crqs);
2964         netdev_dbg(netdev, "Outstanding queries: %d\n",
2965                    atomic_read(&adapter->running_cap_crqs));
2966         rc = crq->query_capability.rc.code;
2967         if (rc) {
2968                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2969                 goto out;
2970         }
2971
2972         switch (be16_to_cpu(crq->query_capability.capability)) {
2973         case MIN_TX_QUEUES:
2974                 adapter->min_tx_queues =
2975                     be64_to_cpu(crq->query_capability.number);
2976                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2977                            adapter->min_tx_queues);
2978                 break;
2979         case MIN_RX_QUEUES:
2980                 adapter->min_rx_queues =
2981                     be64_to_cpu(crq->query_capability.number);
2982                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2983                            adapter->min_rx_queues);
2984                 break;
2985         case MIN_RX_ADD_QUEUES:
2986                 adapter->min_rx_add_queues =
2987                     be64_to_cpu(crq->query_capability.number);
2988                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2989                            adapter->min_rx_add_queues);
2990                 break;
2991         case MAX_TX_QUEUES:
2992                 adapter->max_tx_queues =
2993                     be64_to_cpu(crq->query_capability.number);
2994                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2995                            adapter->max_tx_queues);
2996                 break;
2997         case MAX_RX_QUEUES:
2998                 adapter->max_rx_queues =
2999                     be64_to_cpu(crq->query_capability.number);
3000                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3001                            adapter->max_rx_queues);
3002                 break;
3003         case MAX_RX_ADD_QUEUES:
3004                 adapter->max_rx_add_queues =
3005                     be64_to_cpu(crq->query_capability.number);
3006                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3007                            adapter->max_rx_add_queues);
3008                 break;
3009         case MIN_TX_ENTRIES_PER_SUBCRQ:
3010                 adapter->min_tx_entries_per_subcrq =
3011                     be64_to_cpu(crq->query_capability.number);
3012                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3013                            adapter->min_tx_entries_per_subcrq);
3014                 break;
3015         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3016                 adapter->min_rx_add_entries_per_subcrq =
3017                     be64_to_cpu(crq->query_capability.number);
3018                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3019                            adapter->min_rx_add_entries_per_subcrq);
3020                 break;
3021         case MAX_TX_ENTRIES_PER_SUBCRQ:
3022                 adapter->max_tx_entries_per_subcrq =
3023                     be64_to_cpu(crq->query_capability.number);
3024                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3025                            adapter->max_tx_entries_per_subcrq);
3026                 break;
3027         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3028                 adapter->max_rx_add_entries_per_subcrq =
3029                     be64_to_cpu(crq->query_capability.number);
3030                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3031                            adapter->max_rx_add_entries_per_subcrq);
3032                 break;
3033         case TCP_IP_OFFLOAD:
3034                 adapter->tcp_ip_offload =
3035                     be64_to_cpu(crq->query_capability.number);
3036                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3037                            adapter->tcp_ip_offload);
3038                 break;
3039         case PROMISC_SUPPORTED:
3040                 adapter->promisc_supported =
3041                     be64_to_cpu(crq->query_capability.number);
3042                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3043                            adapter->promisc_supported);
3044                 break;
3045         case MIN_MTU:
3046                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3047                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3048                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3049                 break;
3050         case MAX_MTU:
3051                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3052                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3053                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3054                 break;
3055         case MAX_MULTICAST_FILTERS:
3056                 adapter->max_multicast_filters =
3057                     be64_to_cpu(crq->query_capability.number);
3058                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3059                            adapter->max_multicast_filters);
3060                 break;
3061         case VLAN_HEADER_INSERTION:
3062                 adapter->vlan_header_insertion =
3063                     be64_to_cpu(crq->query_capability.number);
3064                 if (adapter->vlan_header_insertion)
3065                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3066                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3067                            adapter->vlan_header_insertion);
3068                 break;
3069         case RX_VLAN_HEADER_INSERTION:
3070                 adapter->rx_vlan_header_insertion =
3071                     be64_to_cpu(crq->query_capability.number);
3072                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3073                            adapter->rx_vlan_header_insertion);
3074                 break;
3075         case MAX_TX_SG_ENTRIES:
3076                 adapter->max_tx_sg_entries =
3077                     be64_to_cpu(crq->query_capability.number);
3078                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3079                            adapter->max_tx_sg_entries);
3080                 break;
3081         case RX_SG_SUPPORTED:
3082                 adapter->rx_sg_supported =
3083                     be64_to_cpu(crq->query_capability.number);
3084                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3085                            adapter->rx_sg_supported);
3086                 break;
3087         case OPT_TX_COMP_SUB_QUEUES:
3088                 adapter->opt_tx_comp_sub_queues =
3089                     be64_to_cpu(crq->query_capability.number);
3090                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3091                            adapter->opt_tx_comp_sub_queues);
3092                 break;
3093         case OPT_RX_COMP_QUEUES:
3094                 adapter->opt_rx_comp_queues =
3095                     be64_to_cpu(crq->query_capability.number);
3096                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3097                            adapter->opt_rx_comp_queues);
3098                 break;
3099         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3100                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3101                     be64_to_cpu(crq->query_capability.number);
3102                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3103                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3104                 break;
3105         case OPT_TX_ENTRIES_PER_SUBCRQ:
3106                 adapter->opt_tx_entries_per_subcrq =
3107                     be64_to_cpu(crq->query_capability.number);
3108                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3109                            adapter->opt_tx_entries_per_subcrq);
3110                 break;
3111         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3112                 adapter->opt_rxba_entries_per_subcrq =
3113                     be64_to_cpu(crq->query_capability.number);
3114                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3115                            adapter->opt_rxba_entries_per_subcrq);
3116                 break;
3117         case TX_RX_DESC_REQ:
3118                 adapter->tx_rx_desc_req = crq->query_capability.number;
3119                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3120                            adapter->tx_rx_desc_req);
3121                 break;
3122
3123         default:
3124                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3125                            crq->query_capability.capability);
3126         }
3127
3128 out:
3129         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3130                 adapter->wait_capability = false;
3131                 ibmvnic_send_req_caps(adapter, 0);
3132         }
3133 }
3134
3135 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3136                                struct ibmvnic_adapter *adapter)
3137 {
3138         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3139         struct net_device *netdev = adapter->netdev;
3140         struct device *dev = &adapter->vdev->dev;
3141         u64 *u64_crq = (u64 *)crq;
3142         long rc;
3143
3144         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3145                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3146                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3147         switch (gen_crq->first) {
3148         case IBMVNIC_CRQ_INIT_RSP:
3149                 switch (gen_crq->cmd) {
3150                 case IBMVNIC_CRQ_INIT:
3151                         dev_info(dev, "Partner initialized\n");
3152                         break;
3153                 case IBMVNIC_CRQ_INIT_COMPLETE:
3154                         dev_info(dev, "Partner initialization complete\n");
3155                         send_version_xchg(adapter);
3156                         break;
3157                 default:
3158                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3159                 }
3160                 return;
3161         case IBMVNIC_CRQ_XPORT_EVENT:
3162                 netif_carrier_off(netdev);
3163                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3164                         dev_info(dev, "Migrated, re-enabling adapter\n");
3165                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3166                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3167                         dev_info(dev, "Backing device failover detected\n");
3168                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3169                 } else {
3170                         /* The adapter lost the connection */
3171                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3172                                 gen_crq->cmd);
3173                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3174                 }
3175                 return;
3176         case IBMVNIC_CRQ_CMD_RSP:
3177                 break;
3178         default:
3179                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3180                         gen_crq->first);
3181                 return;
3182         }
3183
3184         switch (gen_crq->cmd) {
3185         case VERSION_EXCHANGE_RSP:
3186                 rc = crq->version_exchange_rsp.rc.code;
3187                 if (rc) {
3188                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3189                         break;
3190                 }
3191                 dev_info(dev, "Partner protocol version is %d\n",
3192                          crq->version_exchange_rsp.version);
3193                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3194                     ibmvnic_version)
3195                         ibmvnic_version =
3196                             be16_to_cpu(crq->version_exchange_rsp.version);
3197                 send_cap_queries(adapter);
3198                 break;
3199         case QUERY_CAPABILITY_RSP:
3200                 handle_query_cap_rsp(crq, adapter);
3201                 break;
3202         case QUERY_MAP_RSP:
3203                 handle_query_map_rsp(crq, adapter);
3204                 break;
3205         case REQUEST_MAP_RSP:
3206                 handle_request_map_rsp(crq, adapter);
3207                 break;
3208         case REQUEST_UNMAP_RSP:
3209                 handle_request_unmap_rsp(crq, adapter);
3210                 break;
3211         case REQUEST_CAPABILITY_RSP:
3212                 handle_request_cap_rsp(crq, adapter);
3213                 break;
3214         case LOGIN_RSP:
3215                 netdev_dbg(netdev, "Got Login Response\n");
3216                 handle_login_rsp(crq, adapter);
3217                 break;
3218         case LOGICAL_LINK_STATE_RSP:
3219                 netdev_dbg(netdev,
3220                            "Got Logical Link State Response, state: %d rc: %d\n",
3221                            crq->logical_link_state_rsp.link_state,
3222                            crq->logical_link_state_rsp.rc.code);
3223                 adapter->logical_link_state =
3224                     crq->logical_link_state_rsp.link_state;
3225                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3226                 complete(&adapter->init_done);
3227                 break;
3228         case LINK_STATE_INDICATION:
3229                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3230                 adapter->phys_link_state =
3231                     crq->link_state_indication.phys_link_state;
3232                 adapter->logical_link_state =
3233                     crq->link_state_indication.logical_link_state;
3234                 break;
3235         case CHANGE_MAC_ADDR_RSP:
3236                 netdev_dbg(netdev, "Got MAC address change Response\n");
3237                 handle_change_mac_rsp(crq, adapter);
3238                 break;
3239         case ERROR_INDICATION:
3240                 netdev_dbg(netdev, "Got Error Indication\n");
3241                 handle_error_indication(crq, adapter);
3242                 break;
3243         case REQUEST_ERROR_RSP:
3244                 netdev_dbg(netdev, "Got Error Detail Response\n");
3245                 handle_error_info_rsp(crq, adapter);
3246                 break;
3247         case REQUEST_STATISTICS_RSP:
3248                 netdev_dbg(netdev, "Got Statistics Response\n");
3249                 complete(&adapter->stats_done);
3250                 break;
3251         case QUERY_IP_OFFLOAD_RSP:
3252                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3253                 handle_query_ip_offload_rsp(adapter);
3254                 break;
3255         case MULTICAST_CTRL_RSP:
3256                 netdev_dbg(netdev, "Got multicast control Response\n");
3257                 break;
3258         case CONTROL_IP_OFFLOAD_RSP:
3259                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3260                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3261                                  sizeof(adapter->ip_offload_ctrl),
3262                                  DMA_TO_DEVICE);
3263                 complete(&adapter->init_done);
3264                 break;
3265         case COLLECT_FW_TRACE_RSP:
3266                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3267                 complete(&adapter->fw_done);
3268                 break;
3269         default:
3270                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3271                            gen_crq->cmd);
3272         }
3273 }
3274
3275 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3276 {
3277         struct ibmvnic_adapter *adapter = instance;
3278
3279         tasklet_schedule(&adapter->tasklet);
3280         return IRQ_HANDLED;
3281 }
3282
3283 static void ibmvnic_tasklet(void *data)
3284 {
3285         struct ibmvnic_adapter *adapter = data;
3286         struct ibmvnic_crq_queue *queue = &adapter->crq;
3287         union ibmvnic_crq *crq;
3288         unsigned long flags;
3289         bool done = false;
3290
3291         spin_lock_irqsave(&queue->lock, flags);
3292         while (!done) {
3293                 /* Pull all the valid messages off the CRQ */
3294                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3295                         ibmvnic_handle_crq(crq, adapter);
3296                         crq->generic.first = 0;
3297                 }
3298
3299                 /* remain in tasklet until all
3300                  * capabilities responses are received
3301                  */
3302                 if (!adapter->wait_capability)
3303                         done = true;
3304         }
3305         /* if capabilities CRQ's were sent in this tasklet, the following
3306          * tasklet must wait until all responses are received
3307          */
3308         if (atomic_read(&adapter->running_cap_crqs) != 0)
3309                 adapter->wait_capability = true;
3310         spin_unlock_irqrestore(&queue->lock, flags);
3311 }
3312
3313 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3314 {
3315         struct vio_dev *vdev = adapter->vdev;
3316         int rc;
3317
3318         do {
3319                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3320         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3321
3322         if (rc)
3323                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3324
3325         return rc;
3326 }
3327
3328 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3329 {
3330         struct ibmvnic_crq_queue *crq = &adapter->crq;
3331         struct device *dev = &adapter->vdev->dev;
3332         struct vio_dev *vdev = adapter->vdev;
3333         int rc;
3334
3335         /* Close the CRQ */
3336         do {
3337                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3338         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3339
3340         /* Clean out the queue */
3341         memset(crq->msgs, 0, PAGE_SIZE);
3342         crq->cur = 0;
3343
3344         /* And re-open it again */
3345         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3346                                 crq->msg_token, PAGE_SIZE);
3347
3348         if (rc == H_CLOSED)
3349                 /* Adapter is good, but other end is not ready */
3350                 dev_warn(dev, "Partner adapter not ready\n");
3351         else if (rc != 0)
3352                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3353
3354         return rc;
3355 }
3356
3357 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3358 {
3359         struct ibmvnic_crq_queue *crq = &adapter->crq;
3360         struct vio_dev *vdev = adapter->vdev;
3361         long rc;
3362
3363         if (!crq->msgs)
3364                 return;
3365
3366         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3367         free_irq(vdev->irq, adapter);
3368         tasklet_kill(&adapter->tasklet);
3369         do {
3370                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3371         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3372
3373         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3374                          DMA_BIDIRECTIONAL);
3375         free_page((unsigned long)crq->msgs);
3376         crq->msgs = NULL;
3377 }
3378
3379 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3380 {
3381         struct ibmvnic_crq_queue *crq = &adapter->crq;
3382         struct device *dev = &adapter->vdev->dev;
3383         struct vio_dev *vdev = adapter->vdev;
3384         int rc, retrc = -ENOMEM;
3385
3386         if (crq->msgs)
3387                 return 0;
3388
3389         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3390         /* Should we allocate more than one page? */
3391
3392         if (!crq->msgs)
3393                 return -ENOMEM;
3394
3395         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3396         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3397                                         DMA_BIDIRECTIONAL);
3398         if (dma_mapping_error(dev, crq->msg_token))
3399                 goto map_failed;
3400
3401         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3402                                 crq->msg_token, PAGE_SIZE);
3403
3404         if (rc == H_RESOURCE)
3405                 /* maybe kexecing and resource is busy. try a reset */
3406                 rc = ibmvnic_reset_crq(adapter);
3407         retrc = rc;
3408
3409         if (rc == H_CLOSED) {
3410                 dev_warn(dev, "Partner adapter not ready\n");
3411         } else if (rc) {
3412                 dev_warn(dev, "Error %d opening adapter\n", rc);
3413                 goto reg_crq_failed;
3414         }
3415
3416         retrc = 0;
3417
3418         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3419                      (unsigned long)adapter);
3420
3421         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3422         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3423                          adapter);
3424         if (rc) {
3425                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3426                         vdev->irq, rc);
3427                 goto req_irq_failed;
3428         }
3429
3430         rc = vio_enable_interrupts(vdev);
3431         if (rc) {
3432                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3433                 goto req_irq_failed;
3434         }
3435
3436         crq->cur = 0;
3437         spin_lock_init(&crq->lock);
3438
3439         return retrc;
3440
3441 req_irq_failed:
3442         tasklet_kill(&adapter->tasklet);
3443         do {
3444                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3445         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3446 reg_crq_failed:
3447         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3448 map_failed:
3449         free_page((unsigned long)crq->msgs);
3450         crq->msgs = NULL;
3451         return retrc;
3452 }
3453
3454 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3455 {
3456         struct device *dev = &adapter->vdev->dev;
3457         unsigned long timeout = msecs_to_jiffies(30000);
3458         int rc;
3459
3460         rc = init_crq_queue(adapter);
3461         if (rc) {
3462                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3463                 return rc;
3464         }
3465
3466         init_completion(&adapter->init_done);
3467         ibmvnic_send_crq_init(adapter);
3468         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3469                 dev_err(dev, "Initialization sequence timed out\n");
3470                 release_crq_queue(adapter);
3471                 return -1;
3472         }
3473
3474         rc = init_sub_crqs(adapter);
3475         if (rc) {
3476                 dev_err(dev, "Initialization of sub crqs failed\n");
3477                 release_crq_queue(adapter);
3478         }
3479
3480         return rc;
3481 }
3482
3483 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3484 {
3485         struct ibmvnic_adapter *adapter;
3486         struct net_device *netdev;
3487         unsigned char *mac_addr_p;
3488         int rc;
3489
3490         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3491                 dev->unit_address);
3492
3493         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3494                                                         VETH_MAC_ADDR, NULL);
3495         if (!mac_addr_p) {
3496                 dev_err(&dev->dev,
3497                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3498                         __FILE__, __LINE__);
3499                 return 0;
3500         }
3501
3502         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3503                                    IBMVNIC_MAX_TX_QUEUES);
3504         if (!netdev)
3505                 return -ENOMEM;
3506
3507         adapter = netdev_priv(netdev);
3508         adapter->state = VNIC_PROBING;
3509         dev_set_drvdata(&dev->dev, netdev);
3510         adapter->vdev = dev;
3511         adapter->netdev = netdev;
3512
3513         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3514         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3515         netdev->irq = dev->irq;
3516         netdev->netdev_ops = &ibmvnic_netdev_ops;
3517         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3518         SET_NETDEV_DEV(netdev, &dev->dev);
3519
3520         spin_lock_init(&adapter->stats_lock);
3521
3522         INIT_LIST_HEAD(&adapter->errors);
3523         spin_lock_init(&adapter->error_list_lock);
3524
3525         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3526         INIT_LIST_HEAD(&adapter->rwi_list);
3527         mutex_init(&adapter->reset_lock);
3528         mutex_init(&adapter->rwi_lock);
3529         adapter->resetting = false;
3530
3531         rc = ibmvnic_init(adapter);
3532         if (rc) {
3533                 free_netdev(netdev);
3534                 return rc;
3535         }
3536
3537         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3538
3539         rc = register_netdev(netdev);
3540         if (rc) {
3541                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3542                 free_netdev(netdev);
3543                 return rc;
3544         }
3545         dev_info(&dev->dev, "ibmvnic registered\n");
3546
3547         adapter->state = VNIC_PROBED;
3548         return 0;
3549 }
3550
3551 static int ibmvnic_remove(struct vio_dev *dev)
3552 {
3553         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3554         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3555
3556         adapter->state = VNIC_REMOVING;
3557         unregister_netdev(netdev);
3558         mutex_lock(&adapter->reset_lock);
3559
3560         release_resources(adapter);
3561         release_sub_crqs(adapter);
3562         release_crq_queue(adapter);
3563
3564         adapter->state = VNIC_REMOVED;
3565
3566         mutex_unlock(&adapter->reset_lock);
3567         free_netdev(netdev);
3568         dev_set_drvdata(&dev->dev, NULL);
3569
3570         return 0;
3571 }
3572
3573 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3574 {
3575         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3576         struct ibmvnic_adapter *adapter;
3577         struct iommu_table *tbl;
3578         unsigned long ret = 0;
3579         int i;
3580
3581         tbl = get_iommu_table_base(&vdev->dev);
3582
3583         /* netdev inits at probe time along with the structures we need below*/
3584         if (!netdev)
3585                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3586
3587         adapter = netdev_priv(netdev);
3588
3589         ret += PAGE_SIZE; /* the crq message queue */
3590         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3591
3592         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3593                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3594
3595         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3596              i++)
3597                 ret += adapter->rx_pool[i].size *
3598                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3599
3600         return ret;
3601 }
3602
3603 static int ibmvnic_resume(struct device *dev)
3604 {
3605         struct net_device *netdev = dev_get_drvdata(dev);
3606         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3607         int i;
3608
3609         /* kick the interrupt handlers just in case we lost an interrupt */
3610         for (i = 0; i < adapter->req_rx_queues; i++)
3611                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3612                                      adapter->rx_scrq[i]);
3613
3614         return 0;
3615 }
3616
3617 static struct vio_device_id ibmvnic_device_table[] = {
3618         {"network", "IBM,vnic"},
3619         {"", "" }
3620 };
3621 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3622
3623 static const struct dev_pm_ops ibmvnic_pm_ops = {
3624         .resume = ibmvnic_resume
3625 };
3626
3627 static struct vio_driver ibmvnic_driver = {
3628         .id_table       = ibmvnic_device_table,
3629         .probe          = ibmvnic_probe,
3630         .remove         = ibmvnic_remove,
3631         .get_desired_dma = ibmvnic_get_desired_dma,
3632         .name           = ibmvnic_driver_name,
3633         .pm             = &ibmvnic_pm_ops,
3634 };
3635
3636 /* module functions */
3637 static int __init ibmvnic_module_init(void)
3638 {
3639         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3640                 IBMVNIC_DRIVER_VERSION);
3641
3642         return vio_register_driver(&ibmvnic_driver);
3643 }
3644
3645 static void __exit ibmvnic_module_exit(void)
3646 {
3647         vio_unregister_driver(&ibmvnic_driver);
3648 }
3649
3650 module_init(ibmvnic_module_init);
3651 module_exit(ibmvnic_module_exit);