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
  78 #include "ibmvnic.h"
  79
  80 static const char ibmvnic_driver_name[] = "ibmvnic";
  81 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  82
  83 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  84 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  85 MODULE_LICENSE("GPL");
  86 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  87
  88 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  89 static int ibmvnic_remove(struct vio_dev *);
  90 static void release_sub_crqs(struct ibmvnic_adapter *);
  91 static void release_sub_crqs_no_irqs(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 /* net_device_ops functions */
 167
 168 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 169                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 170                          int buff_size, int active)
 171 {
 172         netdev_dbg(adapter->netdev,
 173                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 174                    index, num, buff_size);
 175         rx_pool->size = num;
 176         rx_pool->index = index;
 177         rx_pool->buff_size = buff_size;
 178         rx_pool->active = active;
 179 }
 180
 181 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 182                                 struct ibmvnic_long_term_buff *ltb, int size)
 183 {
 184         struct device *dev = &adapter->vdev->dev;
 185
 186         ltb->size = size;
 187         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 188                                        GFP_KERNEL);
 189
 190         if (!ltb->buff) {
 191                 dev_err(dev, "Couldn't alloc long term buffer\n");
 192                 return -ENOMEM;
 193         }
 194         ltb->map_id = adapter->map_id;
 195         adapter->map_id++;
 196
 197         init_completion(&adapter->fw_done);
 198         send_request_map(adapter, ltb->addr,
 199                          ltb->size, ltb->map_id);
 200         wait_for_completion(&adapter->fw_done);
 201         return 0;
 202 }
 203
 204 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 205                                 struct ibmvnic_long_term_buff *ltb)
 206 {
 207         struct device *dev = &adapter->vdev->dev;
 208
 209         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 210         if (!adapter->failover)
 211                 send_request_unmap(adapter, ltb->map_id);
 212 }
 213
 214 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 215                          struct ibmvnic_rx_pool *pool)
 216 {
 217         struct device *dev = &adapter->vdev->dev;
 218         int i;
 219
 220         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 221         if (!pool->free_map)
 222                 return -ENOMEM;
 223
 224         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 225                                 GFP_KERNEL);
 226
 227         if (!pool->rx_buff) {
 228                 dev_err(dev, "Couldn't alloc rx buffers\n");
 229                 kfree(pool->free_map);
 230                 return -ENOMEM;
 231         }
 232
 233         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 234                                  pool->size * pool->buff_size)) {
 235                 kfree(pool->free_map);
 236                 kfree(pool->rx_buff);
 237                 return -ENOMEM;
 238         }
 239
 240         for (i = 0; i < pool->size; ++i)
 241                 pool->free_map[i] = i;
 242
 243         atomic_set(&pool->available, 0);
 244         pool->next_alloc = 0;
 245         pool->next_free = 0;
 246
 247         return 0;
 248 }
 249
 250 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 251                               struct ibmvnic_rx_pool *pool)
 252 {
 253         int count = pool->size - atomic_read(&pool->available);
 254         struct device *dev = &adapter->vdev->dev;
 255         int buffers_added = 0;
 256         unsigned long lpar_rc;
 257         union sub_crq sub_crq;
 258         struct sk_buff *skb;
 259         unsigned int offset;
 260         dma_addr_t dma_addr;
 261         unsigned char *dst;
 262         u64 *handle_array;
 263         int shift = 0;
 264         int index;
 265         int i;
 266
 267         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 268                                       be32_to_cpu(adapter->login_rsp_buf->
 269                                       off_rxadd_subcrqs));
 270
 271         for (i = 0; i < count; ++i) {
 272                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 273                 if (!skb) {
 274                         dev_err(dev, "Couldn't replenish rx buff\n");
 275                         adapter->replenish_no_mem++;
 276                         break;
 277                 }
 278
 279                 index = pool->free_map[pool->next_free];
 280
 281                 if (pool->rx_buff[index].skb)
 282                         dev_err(dev, "Inconsistent free_map!\n");
 283
 284                 /* Copy the skb to the long term mapped DMA buffer */
 285                 offset = index * pool->buff_size;
 286                 dst = pool->long_term_buff.buff + offset;
 287                 memset(dst, 0, pool->buff_size);
 288                 dma_addr = pool->long_term_buff.addr + offset;
 289                 pool->rx_buff[index].data = dst;
 290
 291                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 292                 pool->rx_buff[index].dma = dma_addr;
 293                 pool->rx_buff[index].skb = skb;
 294                 pool->rx_buff[index].pool_index = pool->index;
 295                 pool->rx_buff[index].size = pool->buff_size;
 296
 297                 memset(&sub_crq, 0, sizeof(sub_crq));
 298                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 299                 sub_crq.rx_add.correlator =
 300                     cpu_to_be64((u64)&pool->rx_buff[index]);
 301                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 302                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 303
 304                 /* The length field of the sCRQ is defined to be 24 bits so the
 305                  * buffer size needs to be left shifted by a byte before it is
 306                  * converted to big endian to prevent the last byte from being
 307                  * truncated.
 308                  */
 309 #ifdef __LITTLE_ENDIAN__
 310                 shift = 8;
 311 #endif
 312                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 313
 314                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 315                                       &sub_crq);
 316                 if (lpar_rc != H_SUCCESS)
 317                         goto failure;
 318
 319                 buffers_added++;
 320                 adapter->replenish_add_buff_success++;
 321                 pool->next_free = (pool->next_free + 1) % pool->size;
 322         }
 323         atomic_add(buffers_added, &pool->available);
 324         return;
 325
 326 failure:
 327         dev_info(dev, "replenish pools failure\n");
 328         pool->free_map[pool->next_free] = index;
 329         pool->rx_buff[index].skb = NULL;
 330         if (!dma_mapping_error(dev, dma_addr))
 331                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 332                                  DMA_FROM_DEVICE);
 333
 334         dev_kfree_skb_any(skb);
 335         adapter->replenish_add_buff_failure++;
 336         atomic_add(buffers_added, &pool->available);
 337 }
 338
 339 static void replenish_pools(struct ibmvnic_adapter *adapter)
 340 {
 341         int i;
 342
 343         if (adapter->migrated)
 344                 return;
 345
 346         adapter->replenish_task_cycles++;
 347         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 348              i++) {
 349                 if (adapter->rx_pool[i].active)
 350                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 351         }
 352 }
 353
 354 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 355                          struct ibmvnic_rx_pool *pool)
 356 {
 357         int i;
 358
 359         kfree(pool->free_map);
 360         pool->free_map = NULL;
 361
 362         if (!pool->rx_buff)
 363                 return;
 364
 365         for (i = 0; i < pool->size; i++) {
 366                 if (pool->rx_buff[i].skb) {
 367                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 368                         pool->rx_buff[i].skb = NULL;
 369                 }
 370         }
 371         kfree(pool->rx_buff);
 372         pool->rx_buff = NULL;
 373 }
 374
 375 static int ibmvnic_login(struct net_device *netdev)
 376 {
 377         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 378         unsigned long timeout = msecs_to_jiffies(30000);
 379         struct device *dev = &adapter->vdev->dev;
 380
 381         do {
 382                 if (adapter->renegotiate) {
 383                         adapter->renegotiate = false;
 384                         release_sub_crqs_no_irqs(adapter);
 385
 386                         reinit_completion(&adapter->init_done);
 387                         send_cap_queries(adapter);
 388                         if (!wait_for_completion_timeout(&adapter->init_done,
 389                                                          timeout)) {
 390                                 dev_err(dev, "Capabilities query timeout\n");
 391                                 return -1;
 392                         }
 393                 }
 394
 395                 reinit_completion(&adapter->init_done);
 396                 send_login(adapter);
 397                 if (!wait_for_completion_timeout(&adapter->init_done,
 398                                                  timeout)) {
 399                         dev_err(dev, "Login timeout\n");
 400                         return -1;
 401                 }
 402         } while (adapter->renegotiate);
 403
 404         return 0;
 405 }
 406
 407 static int ibmvnic_open(struct net_device *netdev)
 408 {
 409         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 410         struct device *dev = &adapter->vdev->dev;
 411         struct ibmvnic_tx_pool *tx_pool;
 412         union ibmvnic_crq crq;
 413         int rxadd_subcrqs;
 414         u64 *size_array;
 415         int tx_subcrqs;
 416         int rc = 0;
 417         int i, j;
 418
 419         if (adapter->is_closed) {
 420                 rc = ibmvnic_init(adapter);
 421                 if (rc)
 422                         return rc;
 423         }
 424
 425         rc = ibmvnic_login(netdev);
 426         if (rc)
 427                 return rc;
 428
 429         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 430         if (rc) {
 431                 dev_err(dev, "failed to set the number of tx queues\n");
 432                 return -1;
 433         }
 434
 435         rc = init_sub_crq_irqs(adapter);
 436         if (rc) {
 437                 dev_err(dev, "failed to initialize sub crq irqs\n");
 438                 return -1;
 439         }
 440
 441         rxadd_subcrqs =
 442             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 443         tx_subcrqs =
 444             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 445         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 446                                   be32_to_cpu(adapter->login_rsp_buf->
 447                                               off_rxadd_buff_size));
 448         adapter->map_id = 1;
 449         adapter->napi = kcalloc(adapter->req_rx_queues,
 450                                 sizeof(struct napi_struct), GFP_KERNEL);
 451         if (!adapter->napi)
 452                 goto alloc_napi_failed;
 453         for (i = 0; i < adapter->req_rx_queues; i++) {
 454                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 455                                NAPI_POLL_WEIGHT);
 456                 napi_enable(&adapter->napi[i]);
 457         }
 458         adapter->rx_pool =
 459             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 460
 461         if (!adapter->rx_pool)
 462                 goto rx_pool_arr_alloc_failed;
 463         send_map_query(adapter);
 464         for (i = 0; i < rxadd_subcrqs; i++) {
 465                 init_rx_pool(adapter, &adapter->rx_pool[i],
 466                              adapter->req_rx_add_entries_per_subcrq, i,
 467                              be64_to_cpu(size_array[i]), 1);
 468                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 469                         dev_err(dev, "Couldn't alloc rx pool\n");
 470                         goto rx_pool_alloc_failed;
 471                 }
 472         }
 473         adapter->tx_pool =
 474             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 475
 476         if (!adapter->tx_pool)
 477                 goto tx_pool_arr_alloc_failed;
 478         for (i = 0; i < tx_subcrqs; i++) {
 479                 tx_pool = &adapter->tx_pool[i];
 480                 tx_pool->tx_buff =
 481                     kcalloc(adapter->req_tx_entries_per_subcrq,
 482                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 483                 if (!tx_pool->tx_buff)
 484                         goto tx_pool_alloc_failed;
 485
 486                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 487                                          adapter->req_tx_entries_per_subcrq *
 488                                          adapter->req_mtu))
 489                         goto tx_ltb_alloc_failed;
 490
 491                 tx_pool->free_map =
 492                     kcalloc(adapter->req_tx_entries_per_subcrq,
 493                             sizeof(int), GFP_KERNEL);
 494                 if (!tx_pool->free_map)
 495                         goto tx_fm_alloc_failed;
 496
 497                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 498                         tx_pool->free_map[j] = j;
 499
 500                 tx_pool->consumer_index = 0;
 501                 tx_pool->producer_index = 0;
 502         }
 503         adapter->bounce_buffer_size =
 504             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 505         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 506                                          GFP_KERNEL);
 507         if (!adapter->bounce_buffer)
 508                 goto bounce_alloc_failed;
 509
 510         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 511                                                     adapter->bounce_buffer_size,
 512                                                     DMA_TO_DEVICE);
 513         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 514                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 515                 goto bounce_map_failed;
 516         }
 517         replenish_pools(adapter);
 518
 519         /* We're ready to receive frames, enable the sub-crq interrupts and
 520          * set the logical link state to up
 521          */
 522         for (i = 0; i < adapter->req_rx_queues; i++)
 523                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 524
 525         for (i = 0; i < adapter->req_tx_queues; i++)
 526                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 527
 528         memset(&crq, 0, sizeof(crq));
 529         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 530         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 531         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 532         ibmvnic_send_crq(adapter, &crq);
 533
 534         netif_tx_start_all_queues(netdev);
 535         adapter->is_closed = false;
 536
 537         return 0;
 538
 539 bounce_map_failed:
 540         kfree(adapter->bounce_buffer);
 541 bounce_alloc_failed:
 542         i = tx_subcrqs - 1;
 543         kfree(adapter->tx_pool[i].free_map);
 544 tx_fm_alloc_failed:
 545         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 546 tx_ltb_alloc_failed:
 547         kfree(adapter->tx_pool[i].tx_buff);
 548 tx_pool_alloc_failed:
 549         for (j = 0; j < i; j++) {
 550                 kfree(adapter->tx_pool[j].tx_buff);
 551                 free_long_term_buff(adapter,
 552                                     &adapter->tx_pool[j].long_term_buff);
 553                 kfree(adapter->tx_pool[j].free_map);
 554         }
 555         kfree(adapter->tx_pool);
 556         adapter->tx_pool = NULL;
 557 tx_pool_arr_alloc_failed:
 558         i = rxadd_subcrqs;
 559 rx_pool_alloc_failed:
 560         for (j = 0; j < i; j++) {
 561                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 562                 free_long_term_buff(adapter,
 563                                     &adapter->rx_pool[j].long_term_buff);
 564         }
 565         kfree(adapter->rx_pool);
 566         adapter->rx_pool = NULL;
 567 rx_pool_arr_alloc_failed:
 568         for (i = 0; i < adapter->req_rx_queues; i++)
 569                 napi_disable(&adapter->napi[i]);
 570 alloc_napi_failed:
 571         release_sub_crqs(adapter);
 572         return -ENOMEM;
 573 }
 574
 575 static void ibmvnic_release_resources(struct ibmvnic_adapter *adapter)
 576 {
 577         struct device *dev = &adapter->vdev->dev;
 578         int tx_scrqs, rx_scrqs;
 579         int i;
 580
 581         if (adapter->bounce_buffer) {
 582                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 583                         dma_unmap_single(&adapter->vdev->dev,
 584                                          adapter->bounce_buffer_dma,
 585                                          adapter->bounce_buffer_size,
 586                                          DMA_BIDIRECTIONAL);
 587                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 588                 }
 589                 kfree(adapter->bounce_buffer);
 590                 adapter->bounce_buffer = NULL;
 591         }
 592
 593         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 594         for (i = 0; i < tx_scrqs; i++) {
 595                 struct ibmvnic_tx_pool *tx_pool = &adapter->tx_pool[i];
 596
 597                 kfree(tx_pool->tx_buff);
 598                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 599                 kfree(tx_pool->free_map);
 600         }
 601         kfree(adapter->tx_pool);
 602         adapter->tx_pool = NULL;
 603
 604         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 605         for (i = 0; i < rx_scrqs; i++) {
 606                 struct ibmvnic_rx_pool *rx_pool = &adapter->rx_pool[i];
 607
 608                 free_rx_pool(adapter, rx_pool);
 609                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 610         }
 611         kfree(adapter->rx_pool);
 612         adapter->rx_pool = NULL;
 613
 614         release_sub_crqs(adapter);
 615         release_crq_queue(adapter);
 616
 617         if (adapter->stats_token)
 618                 dma_unmap_single(dev, adapter->stats_token,
 619                                  sizeof(struct ibmvnic_statistics),
 620                                  DMA_FROM_DEVICE);
 621 }
 622
 623 static int ibmvnic_close(struct net_device *netdev)
 624 {
 625         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 626         union ibmvnic_crq crq;
 627         int i;
 628
 629         adapter->closing = true;
 630
 631         for (i = 0; i < adapter->req_rx_queues; i++)
 632                 napi_disable(&adapter->napi[i]);
 633
 634         if (!adapter->failover)
 635                 netif_tx_stop_all_queues(netdev);
 636
 637         memset(&crq, 0, sizeof(crq));
 638         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 639         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 640         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 641         ibmvnic_send_crq(adapter, &crq);
 642
 643         ibmvnic_release_resources(adapter);
 644
 645         adapter->is_closed = true;
 646         adapter->closing = false;
 647         return 0;
 648 }
 649
 650 /**
 651  * build_hdr_data - creates L2/L3/L4 header data buffer
 652  * @hdr_field - bitfield determining needed headers
 653  * @skb - socket buffer
 654  * @hdr_len - array of header lengths
 655  * @tot_len - total length of data
 656  *
 657  * Reads hdr_field to determine which headers are needed by firmware.
 658  * Builds a buffer containing these headers.  Saves individual header
 659  * lengths and total buffer length to be used to build descriptors.
 660  */
 661 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 662                           int *hdr_len, u8 *hdr_data)
 663 {
 664         int len = 0;
 665         u8 *hdr;
 666
 667         hdr_len[0] = sizeof(struct ethhdr);
 668
 669         if (skb->protocol == htons(ETH_P_IP)) {
 670                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 671                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 672                         hdr_len[2] = tcp_hdrlen(skb);
 673                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 674                         hdr_len[2] = sizeof(struct udphdr);
 675         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 676                 hdr_len[1] = sizeof(struct ipv6hdr);
 677                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 678                         hdr_len[2] = tcp_hdrlen(skb);
 679                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 680                         hdr_len[2] = sizeof(struct udphdr);
 681         }
 682
 683         memset(hdr_data, 0, 120);
 684         if ((hdr_field >> 6) & 1) {
 685                 hdr = skb_mac_header(skb);
 686                 memcpy(hdr_data, hdr, hdr_len[0]);
 687                 len += hdr_len[0];
 688         }
 689
 690         if ((hdr_field >> 5) & 1) {
 691                 hdr = skb_network_header(skb);
 692                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 693                 len += hdr_len[1];
 694         }
 695
 696         if ((hdr_field >> 4) & 1) {
 697                 hdr = skb_transport_header(skb);
 698                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 699                 len += hdr_len[2];
 700         }
 701         return len;
 702 }
 703
 704 /**
 705  * create_hdr_descs - create header and header extension descriptors
 706  * @hdr_field - bitfield determining needed headers
 707  * @data - buffer containing header data
 708  * @len - length of data buffer
 709  * @hdr_len - array of individual header lengths
 710  * @scrq_arr - descriptor array
 711  *
 712  * Creates header and, if needed, header extension descriptors and
 713  * places them in a descriptor array, scrq_arr
 714  */
 715
 716 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 717                              union sub_crq *scrq_arr)
 718 {
 719         union sub_crq hdr_desc;
 720         int tmp_len = len;
 721         u8 *data, *cur;
 722         int tmp;
 723
 724         while (tmp_len > 0) {
 725                 cur = hdr_data + len - tmp_len;
 726
 727                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 728                 if (cur != hdr_data) {
 729                         data = hdr_desc.hdr_ext.data;
 730                         tmp = tmp_len > 29 ? 29 : tmp_len;
 731                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 732                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 733                         hdr_desc.hdr_ext.len = tmp;
 734                 } else {
 735                         data = hdr_desc.hdr.data;
 736                         tmp = tmp_len > 24 ? 24 : tmp_len;
 737                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 738                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 739                         hdr_desc.hdr.len = tmp;
 740                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 741                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 742                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 743                         hdr_desc.hdr.flag = hdr_field << 1;
 744                 }
 745                 memcpy(data, cur, tmp);
 746                 tmp_len -= tmp;
 747                 *scrq_arr = hdr_desc;
 748                 scrq_arr++;
 749         }
 750 }
 751
 752 /**
 753  * build_hdr_descs_arr - build a header descriptor array
 754  * @skb - socket buffer
 755  * @num_entries - number of descriptors to be sent
 756  * @subcrq - first TX descriptor
 757  * @hdr_field - bit field determining which headers will be sent
 758  *
 759  * This function will build a TX descriptor array with applicable
 760  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 761  */
 762
 763 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 764                                 int *num_entries, u8 hdr_field)
 765 {
 766         int hdr_len[3] = {0, 0, 0};
 767         int tot_len, len;
 768         u8 *hdr_data = txbuff->hdr_data;
 769
 770         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 771                                  txbuff->hdr_data);
 772         len = tot_len;
 773         len -= 24;
 774         if (len > 0)
 775                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 776         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 777                          txbuff->indir_arr + 1);
 778 }
 779
 780 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 781 {
 782         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 783         int queue_num = skb_get_queue_mapping(skb);
 784         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 785         struct device *dev = &adapter->vdev->dev;
 786         struct ibmvnic_tx_buff *tx_buff = NULL;
 787         struct ibmvnic_sub_crq_queue *tx_scrq;
 788         struct ibmvnic_tx_pool *tx_pool;
 789         unsigned int tx_send_failed = 0;
 790         unsigned int tx_map_failed = 0;
 791         unsigned int tx_dropped = 0;
 792         unsigned int tx_packets = 0;
 793         unsigned int tx_bytes = 0;
 794         dma_addr_t data_dma_addr;
 795         struct netdev_queue *txq;
 796         bool used_bounce = false;
 797         unsigned long lpar_rc;
 798         union sub_crq tx_crq;
 799         unsigned int offset;
 800         int num_entries = 1;
 801         unsigned char *dst;
 802         u64 *handle_array;
 803         int index = 0;
 804         int ret = 0;
 805
 806         tx_pool = &adapter->tx_pool[queue_num];
 807         tx_scrq = adapter->tx_scrq[queue_num];
 808         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 809         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 810                                    be32_to_cpu(adapter->login_rsp_buf->
 811                                                off_txsubm_subcrqs));
 812         if (adapter->migrated) {
 813                 tx_send_failed++;
 814                 tx_dropped++;
 815                 ret = NETDEV_TX_BUSY;
 816                 goto out;
 817         }
 818
 819         index = tx_pool->free_map[tx_pool->consumer_index];
 820         offset = index * adapter->req_mtu;
 821         dst = tx_pool->long_term_buff.buff + offset;
 822         memset(dst, 0, adapter->req_mtu);
 823         skb_copy_from_linear_data(skb, dst, skb->len);
 824         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 825
 826         tx_pool->consumer_index =
 827             (tx_pool->consumer_index + 1) %
 828                 adapter->req_tx_entries_per_subcrq;
 829
 830         tx_buff = &tx_pool->tx_buff[index];
 831         tx_buff->skb = skb;
 832         tx_buff->data_dma[0] = data_dma_addr;
 833         tx_buff->data_len[0] = skb->len;
 834         tx_buff->index = index;
 835         tx_buff->pool_index = queue_num;
 836         tx_buff->last_frag = true;
 837         tx_buff->used_bounce = used_bounce;
 838
 839         memset(&tx_crq, 0, sizeof(tx_crq));
 840         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 841         tx_crq.v1.type = IBMVNIC_TX_DESC;
 842         tx_crq.v1.n_crq_elem = 1;
 843         tx_crq.v1.n_sge = 1;
 844         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 845         tx_crq.v1.correlator = cpu_to_be32(index);
 846         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 847         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 848         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 849
 850         if (adapter->vlan_header_insertion) {
 851                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 852                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 853         }
 854
 855         if (skb->protocol == htons(ETH_P_IP)) {
 856                 if (ip_hdr(skb)->version == 4)
 857                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 858                 else if (ip_hdr(skb)->version == 6)
 859                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 860
 861                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 862                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 863                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 864                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 865         }
 866
 867         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 868                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 869                 hdrs += 2;
 870         }
 871         /* determine if l2/3/4 headers are sent to firmware */
 872         if ((*hdrs >> 7) & 1 &&
 873             (skb->protocol == htons(ETH_P_IP) ||
 874              skb->protocol == htons(ETH_P_IPV6))) {
 875                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 876                 tx_crq.v1.n_crq_elem = num_entries;
 877                 tx_buff->indir_arr[0] = tx_crq;
 878                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 879                                                     sizeof(tx_buff->indir_arr),
 880                                                     DMA_TO_DEVICE);
 881                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 882                         if (!firmware_has_feature(FW_FEATURE_CMO))
 883                                 dev_err(dev, "tx: unable to map descriptor array\n");
 884                         tx_map_failed++;
 885                         tx_dropped++;
 886                         ret = NETDEV_TX_BUSY;
 887                         goto out;
 888                 }
 889                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 890                                                (u64)tx_buff->indir_dma,
 891                                                (u64)num_entries);
 892         } else {
 893                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 894                                       &tx_crq);
 895         }
 896         if (lpar_rc != H_SUCCESS) {
 897                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 898
 899                 if (tx_pool->consumer_index == 0)
 900                         tx_pool->consumer_index =
 901                                 adapter->req_tx_entries_per_subcrq - 1;
 902                 else
 903                         tx_pool->consumer_index--;
 904
 905                 tx_send_failed++;
 906                 tx_dropped++;
 907                 ret = NETDEV_TX_BUSY;
 908                 goto out;
 909         }
 910
 911         atomic_inc(&tx_scrq->used);
 912
 913         if (atomic_read(&tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) {
 914                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
 915                 netif_stop_subqueue(netdev, queue_num);
 916         }
 917
 918         tx_packets++;
 919         tx_bytes += skb->len;
 920         txq->trans_start = jiffies;
 921         ret = NETDEV_TX_OK;
 922
 923 out:
 924         netdev->stats.tx_dropped += tx_dropped;
 925         netdev->stats.tx_bytes += tx_bytes;
 926         netdev->stats.tx_packets += tx_packets;
 927         adapter->tx_send_failed += tx_send_failed;
 928         adapter->tx_map_failed += tx_map_failed;
 929
 930         return ret;
 931 }
 932
 933 static void ibmvnic_set_multi(struct net_device *netdev)
 934 {
 935         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 936         struct netdev_hw_addr *ha;
 937         union ibmvnic_crq crq;
 938
 939         memset(&crq, 0, sizeof(crq));
 940         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 941         crq.request_capability.cmd = REQUEST_CAPABILITY;
 942
 943         if (netdev->flags & IFF_PROMISC) {
 944                 if (!adapter->promisc_supported)
 945                         return;
 946         } else {
 947                 if (netdev->flags & IFF_ALLMULTI) {
 948                         /* Accept all multicast */
 949                         memset(&crq, 0, sizeof(crq));
 950                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 951                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 952                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 953                         ibmvnic_send_crq(adapter, &crq);
 954                 } else if (netdev_mc_empty(netdev)) {
 955                         /* Reject all multicast */
 956                         memset(&crq, 0, sizeof(crq));
 957                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 958                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 959                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 960                         ibmvnic_send_crq(adapter, &crq);
 961                 } else {
 962                         /* Accept one or more multicast(s) */
 963                         netdev_for_each_mc_addr(ha, netdev) {
 964                                 memset(&crq, 0, sizeof(crq));
 965                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 966                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 967                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 968                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 969                                                 ha->addr);
 970                                 ibmvnic_send_crq(adapter, &crq);
 971                         }
 972                 }
 973         }
 974 }
 975
 976 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 977 {
 978         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 979         struct sockaddr *addr = p;
 980         union ibmvnic_crq crq;
 981
 982         if (!is_valid_ether_addr(addr->sa_data))
 983                 return -EADDRNOTAVAIL;
 984
 985         memset(&crq, 0, sizeof(crq));
 986         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 987         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 988         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 989         ibmvnic_send_crq(adapter, &crq);
 990         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 991         return 0;
 992 }
 993
 994 static void ibmvnic_tx_timeout(struct net_device *dev)
 995 {
 996         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 997         int rc;
 998
 999         /* Adapter timed out, resetting it */
1000         release_sub_crqs(adapter);
1001         rc = ibmvnic_reset_crq(adapter);
1002         if (rc)
1003                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
1004         else
1005                 ibmvnic_send_crq_init(adapter);
1006 }
1007
1008 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1009                                   struct ibmvnic_rx_buff *rx_buff)
1010 {
1011         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1012
1013         rx_buff->skb = NULL;
1014
1015         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1016         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1017
1018         atomic_dec(&pool->available);
1019 }
1020
1021 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1022 {
1023         struct net_device *netdev = napi->dev;
1024         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1025         int scrq_num = (int)(napi - adapter->napi);
1026         int frames_processed = 0;
1027 restart_poll:
1028         while (frames_processed < budget) {
1029                 struct sk_buff *skb;
1030                 struct ibmvnic_rx_buff *rx_buff;
1031                 union sub_crq *next;
1032                 u32 length;
1033                 u16 offset;
1034                 u8 flags = 0;
1035
1036                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1037                         break;
1038                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1039                 rx_buff =
1040                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1041                                                           rx_comp.correlator);
1042                 /* do error checking */
1043                 if (next->rx_comp.rc) {
1044                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1045                         /* free the entry */
1046                         next->rx_comp.first = 0;
1047                         remove_buff_from_pool(adapter, rx_buff);
1048                         break;
1049                 }
1050
1051                 length = be32_to_cpu(next->rx_comp.len);
1052                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1053                 flags = next->rx_comp.flags;
1054                 skb = rx_buff->skb;
1055                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1056                                         length);
1057                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
1058                 /* free the entry */
1059                 next->rx_comp.first = 0;
1060                 remove_buff_from_pool(adapter, rx_buff);
1061
1062                 skb_put(skb, length);
1063                 skb->protocol = eth_type_trans(skb, netdev);
1064
1065                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1066                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1067                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1068                 }
1069
1070                 length = skb->len;
1071                 napi_gro_receive(napi, skb); /* send it up */
1072                 netdev->stats.rx_packets++;
1073                 netdev->stats.rx_bytes += length;
1074                 frames_processed++;
1075         }
1076         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1077
1078         if (frames_processed < budget) {
1079                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1080                 napi_complete_done(napi, frames_processed);
1081                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1082                     napi_reschedule(napi)) {
1083                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1084                         goto restart_poll;
1085                 }
1086         }
1087         return frames_processed;
1088 }
1089
1090 #ifdef CONFIG_NET_POLL_CONTROLLER
1091 static void ibmvnic_netpoll_controller(struct net_device *dev)
1092 {
1093         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1094         int i;
1095
1096         replenish_pools(netdev_priv(dev));
1097         for (i = 0; i < adapter->req_rx_queues; i++)
1098                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1099                                      adapter->rx_scrq[i]);
1100 }
1101 #endif
1102
1103 static const struct net_device_ops ibmvnic_netdev_ops = {
1104         .ndo_open               = ibmvnic_open,
1105         .ndo_stop               = ibmvnic_close,
1106         .ndo_start_xmit         = ibmvnic_xmit,
1107         .ndo_set_rx_mode        = ibmvnic_set_multi,
1108         .ndo_set_mac_address    = ibmvnic_set_mac,
1109         .ndo_validate_addr      = eth_validate_addr,
1110         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1111 #ifdef CONFIG_NET_POLL_CONTROLLER
1112         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1113 #endif
1114 };
1115
1116 /* ethtool functions */
1117
1118 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1119                                       struct ethtool_link_ksettings *cmd)
1120 {
1121         u32 supported, advertising;
1122
1123         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1124                           SUPPORTED_FIBRE);
1125         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1126                             ADVERTISED_FIBRE);
1127         cmd->base.speed = SPEED_1000;
1128         cmd->base.duplex = DUPLEX_FULL;
1129         cmd->base.port = PORT_FIBRE;
1130         cmd->base.phy_address = 0;
1131         cmd->base.autoneg = AUTONEG_ENABLE;
1132
1133         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1134                                                 supported);
1135         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1136                                                 advertising);
1137
1138         return 0;
1139 }
1140
1141 static void ibmvnic_get_drvinfo(struct net_device *dev,
1142                                 struct ethtool_drvinfo *info)
1143 {
1144         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1145         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1146 }
1147
1148 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1149 {
1150         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1151
1152         return adapter->msg_enable;
1153 }
1154
1155 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1156 {
1157         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1158
1159         adapter->msg_enable = data;
1160 }
1161
1162 static u32 ibmvnic_get_link(struct net_device *netdev)
1163 {
1164         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1165
1166         /* Don't need to send a query because we request a logical link up at
1167          * init and then we wait for link state indications
1168          */
1169         return adapter->logical_link_state;
1170 }
1171
1172 static void ibmvnic_get_ringparam(struct net_device *netdev,
1173                                   struct ethtool_ringparam *ring)
1174 {
1175         ring->rx_max_pending = 0;
1176         ring->tx_max_pending = 0;
1177         ring->rx_mini_max_pending = 0;
1178         ring->rx_jumbo_max_pending = 0;
1179         ring->rx_pending = 0;
1180         ring->tx_pending = 0;
1181         ring->rx_mini_pending = 0;
1182         ring->rx_jumbo_pending = 0;
1183 }
1184
1185 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1186 {
1187         int i;
1188
1189         if (stringset != ETH_SS_STATS)
1190                 return;
1191
1192         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1193                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1194 }
1195
1196 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1197 {
1198         switch (sset) {
1199         case ETH_SS_STATS:
1200                 return ARRAY_SIZE(ibmvnic_stats);
1201         default:
1202                 return -EOPNOTSUPP;
1203         }
1204 }
1205
1206 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1207                                       struct ethtool_stats *stats, u64 *data)
1208 {
1209         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1210         union ibmvnic_crq crq;
1211         int i;
1212
1213         memset(&crq, 0, sizeof(crq));
1214         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1215         crq.request_statistics.cmd = REQUEST_STATISTICS;
1216         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1217         crq.request_statistics.len =
1218             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1219
1220         /* Wait for data to be written */
1221         init_completion(&adapter->stats_done);
1222         ibmvnic_send_crq(adapter, &crq);
1223         wait_for_completion(&adapter->stats_done);
1224
1225         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1226                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1227 }
1228
1229 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1230         .get_drvinfo            = ibmvnic_get_drvinfo,
1231         .get_msglevel           = ibmvnic_get_msglevel,
1232         .set_msglevel           = ibmvnic_set_msglevel,
1233         .get_link               = ibmvnic_get_link,
1234         .get_ringparam          = ibmvnic_get_ringparam,
1235         .get_strings            = ibmvnic_get_strings,
1236         .get_sset_count         = ibmvnic_get_sset_count,
1237         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1238         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1239 };
1240
1241 /* Routines for managing CRQs/sCRQs  */
1242
1243 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1244                                   struct ibmvnic_sub_crq_queue *scrq)
1245 {
1246         struct device *dev = &adapter->vdev->dev;
1247         long rc;
1248
1249         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1250
1251         /* Close the sub-crqs */
1252         do {
1253                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1254                                         adapter->vdev->unit_address,
1255                                         scrq->crq_num);
1256         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1257
1258         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1259                          DMA_BIDIRECTIONAL);
1260         free_pages((unsigned long)scrq->msgs, 2);
1261         kfree(scrq);
1262 }
1263
1264 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1265                                                         *adapter)
1266 {
1267         struct device *dev = &adapter->vdev->dev;
1268         struct ibmvnic_sub_crq_queue *scrq;
1269         int rc;
1270
1271         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1272         if (!scrq)
1273                 return NULL;
1274
1275         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1276         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1277         if (!scrq->msgs) {
1278                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1279                 goto zero_page_failed;
1280         }
1281
1282         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1283                                          DMA_BIDIRECTIONAL);
1284         if (dma_mapping_error(dev, scrq->msg_token)) {
1285                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1286                 goto map_failed;
1287         }
1288
1289         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1290                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1291
1292         if (rc == H_RESOURCE)
1293                 rc = ibmvnic_reset_crq(adapter);
1294
1295         if (rc == H_CLOSED) {
1296                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1297         } else if (rc) {
1298                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1299                 goto reg_failed;
1300         }
1301
1302         scrq->adapter = adapter;
1303         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1304         scrq->cur = 0;
1305         atomic_set(&scrq->used, 0);
1306         scrq->rx_skb_top = NULL;
1307         spin_lock_init(&scrq->lock);
1308
1309         netdev_dbg(adapter->netdev,
1310                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1311                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1312
1313         return scrq;
1314
1315 reg_failed:
1316         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1317                          DMA_BIDIRECTIONAL);
1318 map_failed:
1319         free_pages((unsigned long)scrq->msgs, 2);
1320 zero_page_failed:
1321         kfree(scrq);
1322
1323         return NULL;
1324 }
1325
1326 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1327 {
1328         int i;
1329
1330         if (adapter->tx_scrq) {
1331                 for (i = 0; i < adapter->req_tx_queues; i++)
1332                         if (adapter->tx_scrq[i]) {
1333                                 free_irq(adapter->tx_scrq[i]->irq,
1334                                          adapter->tx_scrq[i]);
1335                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1336                                 release_sub_crq_queue(adapter,
1337                                                       adapter->tx_scrq[i]);
1338                         }
1339                 kfree(adapter->tx_scrq);
1340                 adapter->tx_scrq = NULL;
1341         }
1342
1343         if (adapter->rx_scrq) {
1344                 for (i = 0; i < adapter->req_rx_queues; i++)
1345                         if (adapter->rx_scrq[i]) {
1346                                 free_irq(adapter->rx_scrq[i]->irq,
1347                                          adapter->rx_scrq[i]);
1348                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1349                                 release_sub_crq_queue(adapter,
1350                                                       adapter->rx_scrq[i]);
1351                         }
1352                 kfree(adapter->rx_scrq);
1353                 adapter->rx_scrq = NULL;
1354         }
1355 }
1356
1357 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1358 {
1359         int i;
1360
1361         if (adapter->tx_scrq) {
1362                 for (i = 0; i < adapter->req_tx_queues; i++)
1363                         if (adapter->tx_scrq[i])
1364                                 release_sub_crq_queue(adapter,
1365                                                       adapter->tx_scrq[i]);
1366                 adapter->tx_scrq = NULL;
1367         }
1368
1369         if (adapter->rx_scrq) {
1370                 for (i = 0; i < adapter->req_rx_queues; i++)
1371                         if (adapter->rx_scrq[i])
1372                                 release_sub_crq_queue(adapter,
1373                                                       adapter->rx_scrq[i]);
1374                 adapter->rx_scrq = NULL;
1375         }
1376 }
1377
1378 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1379                             struct ibmvnic_sub_crq_queue *scrq)
1380 {
1381         struct device *dev = &adapter->vdev->dev;
1382         unsigned long rc;
1383
1384         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1385                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1386         if (rc)
1387                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1388                         scrq->hw_irq, rc);
1389         return rc;
1390 }
1391
1392 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1393                            struct ibmvnic_sub_crq_queue *scrq)
1394 {
1395         struct device *dev = &adapter->vdev->dev;
1396         unsigned long rc;
1397
1398         if (scrq->hw_irq > 0x100000000ULL) {
1399                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1400                 return 1;
1401         }
1402
1403         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1404                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1405         if (rc)
1406                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1407                         scrq->hw_irq, rc);
1408         return rc;
1409 }
1410
1411 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1412                                struct ibmvnic_sub_crq_queue *scrq)
1413 {
1414         struct device *dev = &adapter->vdev->dev;
1415         struct ibmvnic_tx_buff *txbuff;
1416         union sub_crq *next;
1417         int index;
1418         int i, j;
1419         u8 first;
1420
1421 restart_loop:
1422         while (pending_scrq(adapter, scrq)) {
1423                 unsigned int pool = scrq->pool_index;
1424
1425                 next = ibmvnic_next_scrq(adapter, scrq);
1426                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1427                         if (next->tx_comp.rcs[i]) {
1428                                 dev_err(dev, "tx error %x\n",
1429                                         next->tx_comp.rcs[i]);
1430                                 continue;
1431                         }
1432                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1433                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1434
1435                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1436                                 if (!txbuff->data_dma[j])
1437                                         continue;
1438
1439                                 txbuff->data_dma[j] = 0;
1440                                 txbuff->used_bounce = false;
1441                         }
1442                         /* if sub_crq was sent indirectly */
1443                         first = txbuff->indir_arr[0].generic.first;
1444                         if (first == IBMVNIC_CRQ_CMD) {
1445                                 dma_unmap_single(dev, txbuff->indir_dma,
1446                                                  sizeof(txbuff->indir_arr),
1447                                                  DMA_TO_DEVICE);
1448                         }
1449
1450                         if (txbuff->last_frag) {
1451                                 atomic_dec(&scrq->used);
1452
1453                                 if (atomic_read(&scrq->used) <=
1454                                     (adapter->req_tx_entries_per_subcrq / 2) &&
1455                                     netif_subqueue_stopped(adapter->netdev,
1456                                                            txbuff->skb)) {
1457                                         netif_wake_subqueue(adapter->netdev,
1458                                                             scrq->pool_index);
1459                                         netdev_dbg(adapter->netdev,
1460                                                    "Started queue %d\n",
1461                                                    scrq->pool_index);
1462                                 }
1463
1464                                 dev_kfree_skb_any(txbuff->skb);
1465                         }
1466
1467                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1468                                                      producer_index] = index;
1469                         adapter->tx_pool[pool].producer_index =
1470                             (adapter->tx_pool[pool].producer_index + 1) %
1471                             adapter->req_tx_entries_per_subcrq;
1472                 }
1473                 /* remove tx_comp scrq*/
1474                 next->tx_comp.first = 0;
1475         }
1476
1477         enable_scrq_irq(adapter, scrq);
1478
1479         if (pending_scrq(adapter, scrq)) {
1480                 disable_scrq_irq(adapter, scrq);
1481                 goto restart_loop;
1482         }
1483
1484         return 0;
1485 }
1486
1487 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1488 {
1489         struct ibmvnic_sub_crq_queue *scrq = instance;
1490         struct ibmvnic_adapter *adapter = scrq->adapter;
1491
1492         disable_scrq_irq(adapter, scrq);
1493         ibmvnic_complete_tx(adapter, scrq);
1494
1495         return IRQ_HANDLED;
1496 }
1497
1498 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1499 {
1500         struct ibmvnic_sub_crq_queue *scrq = instance;
1501         struct ibmvnic_adapter *adapter = scrq->adapter;
1502
1503         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1504                 disable_scrq_irq(adapter, scrq);
1505                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1506         }
1507
1508         return IRQ_HANDLED;
1509 }
1510
1511 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1512 {
1513         struct device *dev = &adapter->vdev->dev;
1514         struct ibmvnic_sub_crq_queue *scrq;
1515         int i = 0, j = 0;
1516         int rc = 0;
1517
1518         for (i = 0; i < adapter->req_tx_queues; i++) {
1519                 scrq = adapter->tx_scrq[i];
1520                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1521
1522                 if (!scrq->irq) {
1523                         rc = -EINVAL;
1524                         dev_err(dev, "Error mapping irq\n");
1525                         goto req_tx_irq_failed;
1526                 }
1527
1528                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1529                                  0, "ibmvnic_tx", scrq);
1530
1531                 if (rc) {
1532                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1533                                 scrq->irq, rc);
1534                         irq_dispose_mapping(scrq->irq);
1535                         goto req_rx_irq_failed;
1536                 }
1537         }
1538
1539         for (i = 0; i < adapter->req_rx_queues; i++) {
1540                 scrq = adapter->rx_scrq[i];
1541                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1542                 if (!scrq->irq) {
1543                         rc = -EINVAL;
1544                         dev_err(dev, "Error mapping irq\n");
1545                         goto req_rx_irq_failed;
1546                 }
1547                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1548                                  0, "ibmvnic_rx", scrq);
1549                 if (rc) {
1550                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1551                                 scrq->irq, rc);
1552                         irq_dispose_mapping(scrq->irq);
1553                         goto req_rx_irq_failed;
1554                 }
1555         }
1556         return rc;
1557
1558 req_rx_irq_failed:
1559         for (j = 0; j < i; j++) {
1560                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1561                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1562         }
1563         i = adapter->req_tx_queues;
1564 req_tx_irq_failed:
1565         for (j = 0; j < i; j++) {
1566                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1567                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1568         }
1569         release_sub_crqs_no_irqs(adapter);
1570         return rc;
1571 }
1572
1573 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1574 {
1575         struct device *dev = &adapter->vdev->dev;
1576         struct ibmvnic_sub_crq_queue **allqueues;
1577         int registered_queues = 0;
1578         union ibmvnic_crq crq;
1579         int total_queues;
1580         int more = 0;
1581         int i;
1582
1583         if (!retry) {
1584                 /* Sub-CRQ entries are 32 byte long */
1585                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1586
1587                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1588                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1589                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1590                         goto allqueues_failed;
1591                 }
1592
1593                 /* Get the minimum between the queried max and the entries
1594                  * that fit in our PAGE_SIZE
1595                  */
1596                 adapter->req_tx_entries_per_subcrq =
1597                     adapter->max_tx_entries_per_subcrq > entries_page ?
1598                     entries_page : adapter->max_tx_entries_per_subcrq;
1599                 adapter->req_rx_add_entries_per_subcrq =
1600                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1601                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1602
1603                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1604                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1605                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1606
1607                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
1608         }
1609
1610         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1611
1612         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1613         if (!allqueues)
1614                 goto allqueues_failed;
1615
1616         for (i = 0; i < total_queues; i++) {
1617                 allqueues[i] = init_sub_crq_queue(adapter);
1618                 if (!allqueues[i]) {
1619                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1620                         break;
1621                 }
1622                 registered_queues++;
1623         }
1624
1625         /* Make sure we were able to register the minimum number of queues */
1626         if (registered_queues <
1627             adapter->min_tx_queues + adapter->min_rx_queues) {
1628                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1629                 goto tx_failed;
1630         }
1631
1632         /* Distribute the failed allocated queues*/
1633         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1634                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1635                 switch (i % 3) {
1636                 case 0:
1637                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1638                                 adapter->req_rx_queues--;
1639                         else
1640                                 more++;
1641                         break;
1642                 case 1:
1643                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1644                                 adapter->req_tx_queues--;
1645                         else
1646                                 more++;
1647                         break;
1648                 }
1649         }
1650
1651         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1652                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1653         if (!adapter->tx_scrq)
1654                 goto tx_failed;
1655
1656         for (i = 0; i < adapter->req_tx_queues; i++) {
1657                 adapter->tx_scrq[i] = allqueues[i];
1658                 adapter->tx_scrq[i]->pool_index = i;
1659         }
1660
1661         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1662                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1663         if (!adapter->rx_scrq)
1664                 goto rx_failed;
1665
1666         for (i = 0; i < adapter->req_rx_queues; i++) {
1667                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1668                 adapter->rx_scrq[i]->scrq_num = i;
1669         }
1670
1671         memset(&crq, 0, sizeof(crq));
1672         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1673         crq.request_capability.cmd = REQUEST_CAPABILITY;
1674
1675         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1676         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1677         atomic_inc(&adapter->running_cap_crqs);
1678         ibmvnic_send_crq(adapter, &crq);
1679
1680         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1681         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1682         atomic_inc(&adapter->running_cap_crqs);
1683         ibmvnic_send_crq(adapter, &crq);
1684
1685         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1686         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1687         atomic_inc(&adapter->running_cap_crqs);
1688         ibmvnic_send_crq(adapter, &crq);
1689
1690         crq.request_capability.capability =
1691             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1692         crq.request_capability.number =
1693             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1694         atomic_inc(&adapter->running_cap_crqs);
1695         ibmvnic_send_crq(adapter, &crq);
1696
1697         crq.request_capability.capability =
1698             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1699         crq.request_capability.number =
1700             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1701         atomic_inc(&adapter->running_cap_crqs);
1702         ibmvnic_send_crq(adapter, &crq);
1703
1704         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1705         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1706         atomic_inc(&adapter->running_cap_crqs);
1707         ibmvnic_send_crq(adapter, &crq);
1708
1709         if (adapter->netdev->flags & IFF_PROMISC) {
1710                 if (adapter->promisc_supported) {
1711                         crq.request_capability.capability =
1712                             cpu_to_be16(PROMISC_REQUESTED);
1713                         crq.request_capability.number = cpu_to_be64(1);
1714                         atomic_inc(&adapter->running_cap_crqs);
1715                         ibmvnic_send_crq(adapter, &crq);
1716                 }
1717         } else {
1718                 crq.request_capability.capability =
1719                     cpu_to_be16(PROMISC_REQUESTED);
1720                 crq.request_capability.number = cpu_to_be64(0);
1721                 atomic_inc(&adapter->running_cap_crqs);
1722                 ibmvnic_send_crq(adapter, &crq);
1723         }
1724
1725         kfree(allqueues);
1726
1727         return;
1728
1729 rx_failed:
1730         kfree(adapter->tx_scrq);
1731         adapter->tx_scrq = NULL;
1732 tx_failed:
1733         for (i = 0; i < registered_queues; i++)
1734                 release_sub_crq_queue(adapter, allqueues[i]);
1735         kfree(allqueues);
1736 allqueues_failed:
1737         ibmvnic_remove(adapter->vdev);
1738 }
1739
1740 static int pending_scrq(struct ibmvnic_adapter *adapter,
1741                         struct ibmvnic_sub_crq_queue *scrq)
1742 {
1743         union sub_crq *entry = &scrq->msgs[scrq->cur];
1744
1745         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1746                 return 1;
1747         else
1748                 return 0;
1749 }
1750
1751 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1752                                         struct ibmvnic_sub_crq_queue *scrq)
1753 {
1754         union sub_crq *entry;
1755         unsigned long flags;
1756
1757         spin_lock_irqsave(&scrq->lock, flags);
1758         entry = &scrq->msgs[scrq->cur];
1759         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1760                 if (++scrq->cur == scrq->size)
1761                         scrq->cur = 0;
1762         } else {
1763                 entry = NULL;
1764         }
1765         spin_unlock_irqrestore(&scrq->lock, flags);
1766
1767         return entry;
1768 }
1769
1770 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1771 {
1772         struct ibmvnic_crq_queue *queue = &adapter->crq;
1773         union ibmvnic_crq *crq;
1774
1775         crq = &queue->msgs[queue->cur];
1776         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1777                 if (++queue->cur == queue->size)
1778                         queue->cur = 0;
1779         } else {
1780                 crq = NULL;
1781         }
1782
1783         return crq;
1784 }
1785
1786 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1787                        union sub_crq *sub_crq)
1788 {
1789         unsigned int ua = adapter->vdev->unit_address;
1790         struct device *dev = &adapter->vdev->dev;
1791         u64 *u64_crq = (u64 *)sub_crq;
1792         int rc;
1793
1794         netdev_dbg(adapter->netdev,
1795                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1796                    (unsigned long int)cpu_to_be64(remote_handle),
1797                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1798                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1799                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1800                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1801
1802         /* Make sure the hypervisor sees the complete request */
1803         mb();
1804
1805         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1806                                 cpu_to_be64(remote_handle),
1807                                 cpu_to_be64(u64_crq[0]),
1808                                 cpu_to_be64(u64_crq[1]),
1809                                 cpu_to_be64(u64_crq[2]),
1810                                 cpu_to_be64(u64_crq[3]));
1811
1812         if (rc) {
1813                 if (rc == H_CLOSED)
1814                         dev_warn(dev, "CRQ Queue closed\n");
1815                 dev_err(dev, "Send error (rc=%d)\n", rc);
1816         }
1817
1818         return rc;
1819 }
1820
1821 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1822                                 u64 remote_handle, u64 ioba, u64 num_entries)
1823 {
1824         unsigned int ua = adapter->vdev->unit_address;
1825         struct device *dev = &adapter->vdev->dev;
1826         int rc;
1827
1828         /* Make sure the hypervisor sees the complete request */
1829         mb();
1830         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1831                                 cpu_to_be64(remote_handle),
1832                                 ioba, num_entries);
1833
1834         if (rc) {
1835                 if (rc == H_CLOSED)
1836                         dev_warn(dev, "CRQ Queue closed\n");
1837                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1838         }
1839
1840         return rc;
1841 }
1842
1843 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1844                             union ibmvnic_crq *crq)
1845 {
1846         unsigned int ua = adapter->vdev->unit_address;
1847         struct device *dev = &adapter->vdev->dev;
1848         u64 *u64_crq = (u64 *)crq;
1849         int rc;
1850
1851         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1852                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1853                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1854
1855         /* Make sure the hypervisor sees the complete request */
1856         mb();
1857
1858         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1859                                 cpu_to_be64(u64_crq[0]),
1860                                 cpu_to_be64(u64_crq[1]));
1861
1862         if (rc) {
1863                 if (rc == H_CLOSED)
1864                         dev_warn(dev, "CRQ Queue closed\n");
1865                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1866         }
1867
1868         return rc;
1869 }
1870
1871 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1872 {
1873         union ibmvnic_crq crq;
1874
1875         memset(&crq, 0, sizeof(crq));
1876         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1877         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1878         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1879
1880         return ibmvnic_send_crq(adapter, &crq);
1881 }
1882
1883 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1884 {
1885         union ibmvnic_crq crq;
1886
1887         memset(&crq, 0, sizeof(crq));
1888         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1889         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1890         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1891
1892         return ibmvnic_send_crq(adapter, &crq);
1893 }
1894
1895 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1896 {
1897         union ibmvnic_crq crq;
1898
1899         memset(&crq, 0, sizeof(crq));
1900         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1901         crq.version_exchange.cmd = VERSION_EXCHANGE;
1902         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1903
1904         return ibmvnic_send_crq(adapter, &crq);
1905 }
1906
1907 static void send_login(struct ibmvnic_adapter *adapter)
1908 {
1909         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1910         struct ibmvnic_login_buffer *login_buffer;
1911         struct ibmvnic_inflight_cmd *inflight_cmd;
1912         struct device *dev = &adapter->vdev->dev;
1913         dma_addr_t rsp_buffer_token;
1914         dma_addr_t buffer_token;
1915         size_t rsp_buffer_size;
1916         union ibmvnic_crq crq;
1917         unsigned long flags;
1918         size_t buffer_size;
1919         __be64 *tx_list_p;
1920         __be64 *rx_list_p;
1921         int i;
1922
1923         buffer_size =
1924             sizeof(struct ibmvnic_login_buffer) +
1925             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1926
1927         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1928         if (!login_buffer)
1929                 goto buf_alloc_failed;
1930
1931         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1932                                       DMA_TO_DEVICE);
1933         if (dma_mapping_error(dev, buffer_token)) {
1934                 dev_err(dev, "Couldn't map login buffer\n");
1935                 goto buf_map_failed;
1936         }
1937
1938         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1939                           sizeof(u64) * adapter->req_tx_queues +
1940                           sizeof(u64) * adapter->req_rx_queues +
1941                           sizeof(u64) * adapter->req_rx_queues +
1942                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1943
1944         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1945         if (!login_rsp_buffer)
1946                 goto buf_rsp_alloc_failed;
1947
1948         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1949                                           rsp_buffer_size, DMA_FROM_DEVICE);
1950         if (dma_mapping_error(dev, rsp_buffer_token)) {
1951                 dev_err(dev, "Couldn't map login rsp buffer\n");
1952                 goto buf_rsp_map_failed;
1953         }
1954         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1955         if (!inflight_cmd) {
1956                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1957                 goto inflight_alloc_failed;
1958         }
1959         adapter->login_buf = login_buffer;
1960         adapter->login_buf_token = buffer_token;
1961         adapter->login_buf_sz = buffer_size;
1962         adapter->login_rsp_buf = login_rsp_buffer;
1963         adapter->login_rsp_buf_token = rsp_buffer_token;
1964         adapter->login_rsp_buf_sz = rsp_buffer_size;
1965
1966         login_buffer->len = cpu_to_be32(buffer_size);
1967         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1968         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1969         login_buffer->off_txcomp_subcrqs =
1970             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1971         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1972         login_buffer->off_rxcomp_subcrqs =
1973             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1974                         sizeof(u64) * adapter->req_tx_queues);
1975         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1976         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1977
1978         tx_list_p = (__be64 *)((char *)login_buffer +
1979                                       sizeof(struct ibmvnic_login_buffer));
1980         rx_list_p = (__be64 *)((char *)login_buffer +
1981                                       sizeof(struct ibmvnic_login_buffer) +
1982                                       sizeof(u64) * adapter->req_tx_queues);
1983
1984         for (i = 0; i < adapter->req_tx_queues; i++) {
1985                 if (adapter->tx_scrq[i]) {
1986                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1987                                                    crq_num);
1988                 }
1989         }
1990
1991         for (i = 0; i < adapter->req_rx_queues; i++) {
1992                 if (adapter->rx_scrq[i]) {
1993                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1994                                                    crq_num);
1995                 }
1996         }
1997
1998         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1999         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2000                 netdev_dbg(adapter->netdev, "%016lx\n",
2001                            ((unsigned long int *)(adapter->login_buf))[i]);
2002         }
2003
2004         memset(&crq, 0, sizeof(crq));
2005         crq.login.first = IBMVNIC_CRQ_CMD;
2006         crq.login.cmd = LOGIN;
2007         crq.login.ioba = cpu_to_be32(buffer_token);
2008         crq.login.len = cpu_to_be32(buffer_size);
2009
2010         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2011
2012         spin_lock_irqsave(&adapter->inflight_lock, flags);
2013         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2014         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2015
2016         ibmvnic_send_crq(adapter, &crq);
2017
2018         return;
2019
2020 inflight_alloc_failed:
2021         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
2022                          DMA_FROM_DEVICE);
2023 buf_rsp_map_failed:
2024         kfree(login_rsp_buffer);
2025 buf_rsp_alloc_failed:
2026         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2027 buf_map_failed:
2028         kfree(login_buffer);
2029 buf_alloc_failed:
2030         return;
2031 }
2032
2033 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2034                              u32 len, u8 map_id)
2035 {
2036         union ibmvnic_crq crq;
2037
2038         memset(&crq, 0, sizeof(crq));
2039         crq.request_map.first = IBMVNIC_CRQ_CMD;
2040         crq.request_map.cmd = REQUEST_MAP;
2041         crq.request_map.map_id = map_id;
2042         crq.request_map.ioba = cpu_to_be32(addr);
2043         crq.request_map.len = cpu_to_be32(len);
2044         ibmvnic_send_crq(adapter, &crq);
2045 }
2046
2047 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2048 {
2049         union ibmvnic_crq crq;
2050
2051         memset(&crq, 0, sizeof(crq));
2052         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2053         crq.request_unmap.cmd = REQUEST_UNMAP;
2054         crq.request_unmap.map_id = map_id;
2055         ibmvnic_send_crq(adapter, &crq);
2056 }
2057
2058 static void send_map_query(struct ibmvnic_adapter *adapter)
2059 {
2060         union ibmvnic_crq crq;
2061
2062         memset(&crq, 0, sizeof(crq));
2063         crq.query_map.first = IBMVNIC_CRQ_CMD;
2064         crq.query_map.cmd = QUERY_MAP;
2065         ibmvnic_send_crq(adapter, &crq);
2066 }
2067
2068 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2069 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2070 {
2071         union ibmvnic_crq crq;
2072
2073         atomic_set(&adapter->running_cap_crqs, 0);
2074         memset(&crq, 0, sizeof(crq));
2075         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2076         crq.query_capability.cmd = QUERY_CAPABILITY;
2077
2078         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2079         atomic_inc(&adapter->running_cap_crqs);
2080         ibmvnic_send_crq(adapter, &crq);
2081
2082         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2083         atomic_inc(&adapter->running_cap_crqs);
2084         ibmvnic_send_crq(adapter, &crq);
2085
2086         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2087         atomic_inc(&adapter->running_cap_crqs);
2088         ibmvnic_send_crq(adapter, &crq);
2089
2090         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2091         atomic_inc(&adapter->running_cap_crqs);
2092         ibmvnic_send_crq(adapter, &crq);
2093
2094         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2095         atomic_inc(&adapter->running_cap_crqs);
2096         ibmvnic_send_crq(adapter, &crq);
2097
2098         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2099         atomic_inc(&adapter->running_cap_crqs);
2100         ibmvnic_send_crq(adapter, &crq);
2101
2102         crq.query_capability.capability =
2103             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2104         atomic_inc(&adapter->running_cap_crqs);
2105         ibmvnic_send_crq(adapter, &crq);
2106
2107         crq.query_capability.capability =
2108             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2109         atomic_inc(&adapter->running_cap_crqs);
2110         ibmvnic_send_crq(adapter, &crq);
2111
2112         crq.query_capability.capability =
2113             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2114         atomic_inc(&adapter->running_cap_crqs);
2115         ibmvnic_send_crq(adapter, &crq);
2116
2117         crq.query_capability.capability =
2118             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2119         atomic_inc(&adapter->running_cap_crqs);
2120         ibmvnic_send_crq(adapter, &crq);
2121
2122         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2123         atomic_inc(&adapter->running_cap_crqs);
2124         ibmvnic_send_crq(adapter, &crq);
2125
2126         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2127         atomic_inc(&adapter->running_cap_crqs);
2128         ibmvnic_send_crq(adapter, &crq);
2129
2130         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2131         atomic_inc(&adapter->running_cap_crqs);
2132         ibmvnic_send_crq(adapter, &crq);
2133
2134         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2135         atomic_inc(&adapter->running_cap_crqs);
2136         ibmvnic_send_crq(adapter, &crq);
2137
2138         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2139         atomic_inc(&adapter->running_cap_crqs);
2140         ibmvnic_send_crq(adapter, &crq);
2141
2142         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2143         atomic_inc(&adapter->running_cap_crqs);
2144         ibmvnic_send_crq(adapter, &crq);
2145
2146         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2147         atomic_inc(&adapter->running_cap_crqs);
2148         ibmvnic_send_crq(adapter, &crq);
2149
2150         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2151         atomic_inc(&adapter->running_cap_crqs);
2152         ibmvnic_send_crq(adapter, &crq);
2153
2154         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2155         atomic_inc(&adapter->running_cap_crqs);
2156         ibmvnic_send_crq(adapter, &crq);
2157
2158         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2159         atomic_inc(&adapter->running_cap_crqs);
2160         ibmvnic_send_crq(adapter, &crq);
2161
2162         crq.query_capability.capability =
2163                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2164         atomic_inc(&adapter->running_cap_crqs);
2165         ibmvnic_send_crq(adapter, &crq);
2166
2167         crq.query_capability.capability =
2168                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2169         atomic_inc(&adapter->running_cap_crqs);
2170         ibmvnic_send_crq(adapter, &crq);
2171
2172         crq.query_capability.capability =
2173                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2174         atomic_inc(&adapter->running_cap_crqs);
2175         ibmvnic_send_crq(adapter, &crq);
2176
2177         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2178         atomic_inc(&adapter->running_cap_crqs);
2179         ibmvnic_send_crq(adapter, &crq);
2180 }
2181
2182 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2183 {
2184         struct device *dev = &adapter->vdev->dev;
2185         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2186         union ibmvnic_crq crq;
2187         int i;
2188
2189         dma_unmap_single(dev, adapter->ip_offload_tok,
2190                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2191
2192         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2193         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2194                 netdev_dbg(adapter->netdev, "%016lx\n",
2195                            ((unsigned long int *)(buf))[i]);
2196
2197         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2198         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2199         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2200                    buf->tcp_ipv4_chksum);
2201         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2202                    buf->tcp_ipv6_chksum);
2203         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2204                    buf->udp_ipv4_chksum);
2205         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2206                    buf->udp_ipv6_chksum);
2207         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2208                    buf->large_tx_ipv4);
2209         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2210                    buf->large_tx_ipv6);
2211         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2212                    buf->large_rx_ipv4);
2213         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2214                    buf->large_rx_ipv6);
2215         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2216                    buf->max_ipv4_header_size);
2217         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2218                    buf->max_ipv6_header_size);
2219         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2220                    buf->max_tcp_header_size);
2221         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2222                    buf->max_udp_header_size);
2223         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2224                    buf->max_large_tx_size);
2225         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2226                    buf->max_large_rx_size);
2227         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2228                    buf->ipv6_extension_header);
2229         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2230                    buf->tcp_pseudosum_req);
2231         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2232                    buf->num_ipv6_ext_headers);
2233         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2234                    buf->off_ipv6_ext_headers);
2235
2236         adapter->ip_offload_ctrl_tok =
2237             dma_map_single(dev, &adapter->ip_offload_ctrl,
2238                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2239
2240         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2241                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2242                 return;
2243         }
2244
2245         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2246         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2247         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2248         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2249         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2250
2251         /* large_tx/rx disabled for now, additional features needed */
2252         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2253         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2254         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2255         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2256
2257         adapter->netdev->features = NETIF_F_GSO;
2258
2259         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2260                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2261
2262         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2263                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2264
2265         if ((adapter->netdev->features &
2266             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2267                 adapter->netdev->features |= NETIF_F_RXCSUM;
2268
2269         memset(&crq, 0, sizeof(crq));
2270         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2271         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2272         crq.control_ip_offload.len =
2273             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2274         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2275         ibmvnic_send_crq(adapter, &crq);
2276 }
2277
2278 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2279                                   struct ibmvnic_adapter *adapter)
2280 {
2281         struct device *dev = &adapter->vdev->dev;
2282         struct ibmvnic_error_buff *error_buff, *tmp;
2283         unsigned long flags;
2284         bool found = false;
2285         int i;
2286
2287         if (!crq->request_error_rsp.rc.code) {
2288                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2289                          crq->request_error_rsp.rc.code);
2290                 return;
2291         }
2292
2293         spin_lock_irqsave(&adapter->error_list_lock, flags);
2294         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2295                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2296                         found = true;
2297                         list_del(&error_buff->list);
2298                         break;
2299                 }
2300         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2301
2302         if (!found) {
2303                 dev_err(dev, "Couldn't find error id %x\n",
2304                         be32_to_cpu(crq->request_error_rsp.error_id));
2305                 return;
2306         }
2307
2308         dev_err(dev, "Detailed info for error id %x:",
2309                 be32_to_cpu(crq->request_error_rsp.error_id));
2310
2311         for (i = 0; i < error_buff->len; i++) {
2312                 pr_cont("%02x", (int)error_buff->buff[i]);
2313                 if (i % 8 == 7)
2314                         pr_cont(" ");
2315         }
2316         pr_cont("\n");
2317
2318         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2319                          DMA_FROM_DEVICE);
2320         kfree(error_buff->buff);
2321         kfree(error_buff);
2322 }
2323
2324 static void handle_error_indication(union ibmvnic_crq *crq,
2325                                     struct ibmvnic_adapter *adapter)
2326 {
2327         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2328         struct ibmvnic_inflight_cmd *inflight_cmd;
2329         struct device *dev = &adapter->vdev->dev;
2330         struct ibmvnic_error_buff *error_buff;
2331         union ibmvnic_crq new_crq;
2332         unsigned long flags;
2333
2334         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2335                 crq->error_indication.
2336                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2337                 be32_to_cpu(crq->error_indication.error_id),
2338                 be16_to_cpu(crq->error_indication.error_cause));
2339
2340         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2341         if (!error_buff)
2342                 return;
2343
2344         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2345         if (!error_buff->buff) {
2346                 kfree(error_buff);
2347                 return;
2348         }
2349
2350         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2351                                          DMA_FROM_DEVICE);
2352         if (dma_mapping_error(dev, error_buff->dma)) {
2353                 if (!firmware_has_feature(FW_FEATURE_CMO))
2354                         dev_err(dev, "Couldn't map error buffer\n");
2355                 kfree(error_buff->buff);
2356                 kfree(error_buff);
2357                 return;
2358         }
2359
2360         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2361         if (!inflight_cmd) {
2362                 dma_unmap_single(dev, error_buff->dma, detail_len,
2363                                  DMA_FROM_DEVICE);
2364                 kfree(error_buff->buff);
2365                 kfree(error_buff);
2366                 return;
2367         }
2368
2369         error_buff->len = detail_len;
2370         error_buff->error_id = crq->error_indication.error_id;
2371
2372         spin_lock_irqsave(&adapter->error_list_lock, flags);
2373         list_add_tail(&error_buff->list, &adapter->errors);
2374         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2375
2376         memset(&new_crq, 0, sizeof(new_crq));
2377         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2378         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2379         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2380         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2381         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2382
2383         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2384
2385         spin_lock_irqsave(&adapter->inflight_lock, flags);
2386         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2387         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2388
2389         ibmvnic_send_crq(adapter, &new_crq);
2390 }
2391
2392 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2393                                   struct ibmvnic_adapter *adapter)
2394 {
2395         struct net_device *netdev = adapter->netdev;
2396         struct device *dev = &adapter->vdev->dev;
2397         long rc;
2398
2399         rc = crq->change_mac_addr_rsp.rc.code;
2400         if (rc) {
2401                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2402                 return;
2403         }
2404         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2405                ETH_ALEN);
2406 }
2407
2408 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2409                                    struct ibmvnic_adapter *adapter)
2410 {
2411         struct device *dev = &adapter->vdev->dev;
2412         u64 *req_value;
2413         char *name;
2414
2415         atomic_dec(&adapter->running_cap_crqs);
2416         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2417         case REQ_TX_QUEUES:
2418                 req_value = &adapter->req_tx_queues;
2419                 name = "tx";
2420                 break;
2421         case REQ_RX_QUEUES:
2422                 req_value = &adapter->req_rx_queues;
2423                 name = "rx";
2424                 break;
2425         case REQ_RX_ADD_QUEUES:
2426                 req_value = &adapter->req_rx_add_queues;
2427                 name = "rx_add";
2428                 break;
2429         case REQ_TX_ENTRIES_PER_SUBCRQ:
2430                 req_value = &adapter->req_tx_entries_per_subcrq;
2431                 name = "tx_entries_per_subcrq";
2432                 break;
2433         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2434                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2435                 name = "rx_add_entries_per_subcrq";
2436                 break;
2437         case REQ_MTU:
2438                 req_value = &adapter->req_mtu;
2439                 name = "mtu";
2440                 break;
2441         case PROMISC_REQUESTED:
2442                 req_value = &adapter->promisc;
2443                 name = "promisc";
2444                 break;
2445         default:
2446                 dev_err(dev, "Got invalid cap request rsp %d\n",
2447                         crq->request_capability.capability);
2448                 return;
2449         }
2450
2451         switch (crq->request_capability_rsp.rc.code) {
2452         case SUCCESS:
2453                 break;
2454         case PARTIALSUCCESS:
2455                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2456                          *req_value,
2457                          (long int)be64_to_cpu(crq->request_capability_rsp.
2458                                                number), name);
2459                 release_sub_crqs_no_irqs(adapter);
2460                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2461                 init_sub_crqs(adapter, 1);
2462                 return;
2463         default:
2464                 dev_err(dev, "Error %d in request cap rsp\n",
2465                         crq->request_capability_rsp.rc.code);
2466                 return;
2467         }
2468
2469         /* Done receiving requested capabilities, query IP offload support */
2470         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2471                 union ibmvnic_crq newcrq;
2472                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2473                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2474                     &adapter->ip_offload_buf;
2475
2476                 adapter->wait_capability = false;
2477                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2478                                                          buf_sz,
2479                                                          DMA_FROM_DEVICE);
2480
2481                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2482                         if (!firmware_has_feature(FW_FEATURE_CMO))
2483                                 dev_err(dev, "Couldn't map offload buffer\n");
2484                         return;
2485                 }
2486
2487                 memset(&newcrq, 0, sizeof(newcrq));
2488                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2489                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2490                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2491                 newcrq.query_ip_offload.ioba =
2492                     cpu_to_be32(adapter->ip_offload_tok);
2493
2494                 ibmvnic_send_crq(adapter, &newcrq);
2495         }
2496 }
2497
2498 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2499                             struct ibmvnic_adapter *adapter)
2500 {
2501         struct device *dev = &adapter->vdev->dev;
2502         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2503         struct ibmvnic_login_buffer *login = adapter->login_buf;
2504         int i;
2505
2506         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2507                          DMA_BIDIRECTIONAL);
2508         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2509                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2510
2511         /* If the number of queues requested can't be allocated by the
2512          * server, the login response will return with code 1. We will need
2513          * to resend the login buffer with fewer queues requested.
2514          */
2515         if (login_rsp_crq->generic.rc.code) {
2516                 adapter->renegotiate = true;
2517                 complete(&adapter->init_done);
2518                 return 0;
2519         }
2520
2521         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2522         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2523                 netdev_dbg(adapter->netdev, "%016lx\n",
2524                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2525         }
2526
2527         /* Sanity checks */
2528         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2529             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2530              adapter->req_rx_add_queues !=
2531              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2532                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2533                 ibmvnic_remove(adapter->vdev);
2534                 return -EIO;
2535         }
2536         complete(&adapter->init_done);
2537
2538         return 0;
2539 }
2540
2541 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2542                                    struct ibmvnic_adapter *adapter)
2543 {
2544         struct device *dev = &adapter->vdev->dev;
2545         u8 map_id = crq->request_map_rsp.map_id;
2546         int tx_subcrqs;
2547         int rx_subcrqs;
2548         long rc;
2549         int i;
2550
2551         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2552         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2553
2554         rc = crq->request_map_rsp.rc.code;
2555         if (rc) {
2556                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2557                 adapter->map_id--;
2558                 /* need to find and zero tx/rx_pool map_id */
2559                 for (i = 0; i < tx_subcrqs; i++) {
2560                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2561                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2562                 }
2563                 for (i = 0; i < rx_subcrqs; i++) {
2564                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2565                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2566                 }
2567         }
2568         complete(&adapter->fw_done);
2569 }
2570
2571 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2572                                      struct ibmvnic_adapter *adapter)
2573 {
2574         struct device *dev = &adapter->vdev->dev;
2575         long rc;
2576
2577         rc = crq->request_unmap_rsp.rc.code;
2578         if (rc)
2579                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2580 }
2581
2582 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2583                                  struct ibmvnic_adapter *adapter)
2584 {
2585         struct net_device *netdev = adapter->netdev;
2586         struct device *dev = &adapter->vdev->dev;
2587         long rc;
2588
2589         rc = crq->query_map_rsp.rc.code;
2590         if (rc) {
2591                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2592                 return;
2593         }
2594         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2595                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2596                    crq->query_map_rsp.free_pages);
2597 }
2598
2599 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2600                                  struct ibmvnic_adapter *adapter)
2601 {
2602         struct net_device *netdev = adapter->netdev;
2603         struct device *dev = &adapter->vdev->dev;
2604         long rc;
2605
2606         atomic_dec(&adapter->running_cap_crqs);
2607         netdev_dbg(netdev, "Outstanding queries: %d\n",
2608                    atomic_read(&adapter->running_cap_crqs));
2609         rc = crq->query_capability.rc.code;
2610         if (rc) {
2611                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2612                 goto out;
2613         }
2614
2615         switch (be16_to_cpu(crq->query_capability.capability)) {
2616         case MIN_TX_QUEUES:
2617                 adapter->min_tx_queues =
2618                     be64_to_cpu(crq->query_capability.number);
2619                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2620                            adapter->min_tx_queues);
2621                 break;
2622         case MIN_RX_QUEUES:
2623                 adapter->min_rx_queues =
2624                     be64_to_cpu(crq->query_capability.number);
2625                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2626                            adapter->min_rx_queues);
2627                 break;
2628         case MIN_RX_ADD_QUEUES:
2629                 adapter->min_rx_add_queues =
2630                     be64_to_cpu(crq->query_capability.number);
2631                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2632                            adapter->min_rx_add_queues);
2633                 break;
2634         case MAX_TX_QUEUES:
2635                 adapter->max_tx_queues =
2636                     be64_to_cpu(crq->query_capability.number);
2637                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2638                            adapter->max_tx_queues);
2639                 break;
2640         case MAX_RX_QUEUES:
2641                 adapter->max_rx_queues =
2642                     be64_to_cpu(crq->query_capability.number);
2643                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2644                            adapter->max_rx_queues);
2645                 break;
2646         case MAX_RX_ADD_QUEUES:
2647                 adapter->max_rx_add_queues =
2648                     be64_to_cpu(crq->query_capability.number);
2649                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2650                            adapter->max_rx_add_queues);
2651                 break;
2652         case MIN_TX_ENTRIES_PER_SUBCRQ:
2653                 adapter->min_tx_entries_per_subcrq =
2654                     be64_to_cpu(crq->query_capability.number);
2655                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2656                            adapter->min_tx_entries_per_subcrq);
2657                 break;
2658         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2659                 adapter->min_rx_add_entries_per_subcrq =
2660                     be64_to_cpu(crq->query_capability.number);
2661                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2662                            adapter->min_rx_add_entries_per_subcrq);
2663                 break;
2664         case MAX_TX_ENTRIES_PER_SUBCRQ:
2665                 adapter->max_tx_entries_per_subcrq =
2666                     be64_to_cpu(crq->query_capability.number);
2667                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2668                            adapter->max_tx_entries_per_subcrq);
2669                 break;
2670         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2671                 adapter->max_rx_add_entries_per_subcrq =
2672                     be64_to_cpu(crq->query_capability.number);
2673                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2674                            adapter->max_rx_add_entries_per_subcrq);
2675                 break;
2676         case TCP_IP_OFFLOAD:
2677                 adapter->tcp_ip_offload =
2678                     be64_to_cpu(crq->query_capability.number);
2679                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2680                            adapter->tcp_ip_offload);
2681                 break;
2682         case PROMISC_SUPPORTED:
2683                 adapter->promisc_supported =
2684                     be64_to_cpu(crq->query_capability.number);
2685                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2686                            adapter->promisc_supported);
2687                 break;
2688         case MIN_MTU:
2689                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2690                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2691                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2692                 break;
2693         case MAX_MTU:
2694                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2695                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
2696                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2697                 break;
2698         case MAX_MULTICAST_FILTERS:
2699                 adapter->max_multicast_filters =
2700                     be64_to_cpu(crq->query_capability.number);
2701                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2702                            adapter->max_multicast_filters);
2703                 break;
2704         case VLAN_HEADER_INSERTION:
2705                 adapter->vlan_header_insertion =
2706                     be64_to_cpu(crq->query_capability.number);
2707                 if (adapter->vlan_header_insertion)
2708                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2709                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2710                            adapter->vlan_header_insertion);
2711                 break;
2712         case MAX_TX_SG_ENTRIES:
2713                 adapter->max_tx_sg_entries =
2714                     be64_to_cpu(crq->query_capability.number);
2715                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2716                            adapter->max_tx_sg_entries);
2717                 break;
2718         case RX_SG_SUPPORTED:
2719                 adapter->rx_sg_supported =
2720                     be64_to_cpu(crq->query_capability.number);
2721                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2722                            adapter->rx_sg_supported);
2723                 break;
2724         case OPT_TX_COMP_SUB_QUEUES:
2725                 adapter->opt_tx_comp_sub_queues =
2726                     be64_to_cpu(crq->query_capability.number);
2727                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2728                            adapter->opt_tx_comp_sub_queues);
2729                 break;
2730         case OPT_RX_COMP_QUEUES:
2731                 adapter->opt_rx_comp_queues =
2732                     be64_to_cpu(crq->query_capability.number);
2733                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2734                            adapter->opt_rx_comp_queues);
2735                 break;
2736         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2737                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2738                     be64_to_cpu(crq->query_capability.number);
2739                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2740                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2741                 break;
2742         case OPT_TX_ENTRIES_PER_SUBCRQ:
2743                 adapter->opt_tx_entries_per_subcrq =
2744                     be64_to_cpu(crq->query_capability.number);
2745                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2746                            adapter->opt_tx_entries_per_subcrq);
2747                 break;
2748         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2749                 adapter->opt_rxba_entries_per_subcrq =
2750                     be64_to_cpu(crq->query_capability.number);
2751                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2752                            adapter->opt_rxba_entries_per_subcrq);
2753                 break;
2754         case TX_RX_DESC_REQ:
2755                 adapter->tx_rx_desc_req = crq->query_capability.number;
2756                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2757                            adapter->tx_rx_desc_req);
2758                 break;
2759
2760         default:
2761                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2762                            crq->query_capability.capability);
2763         }
2764
2765 out:
2766         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2767                 adapter->wait_capability = false;
2768                 init_sub_crqs(adapter, 0);
2769                 /* We're done querying the capabilities, initialize sub-crqs */
2770         }
2771 }
2772
2773 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
2774 {
2775         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
2776         struct device *dev = &adapter->vdev->dev;
2777         struct ibmvnic_error_buff *error_buff, *tmp2;
2778         unsigned long flags;
2779         unsigned long flags2;
2780
2781         spin_lock_irqsave(&adapter->inflight_lock, flags);
2782         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
2783                 switch (inflight_cmd->crq.generic.cmd) {
2784                 case LOGIN:
2785                         dma_unmap_single(dev, adapter->login_buf_token,
2786                                          adapter->login_buf_sz,
2787                                          DMA_BIDIRECTIONAL);
2788                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2789                                          adapter->login_rsp_buf_sz,
2790                                          DMA_BIDIRECTIONAL);
2791                         kfree(adapter->login_rsp_buf);
2792                         kfree(adapter->login_buf);
2793                         break;
2794                 case REQUEST_ERROR_INFO:
2795                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
2796                         list_for_each_entry_safe(error_buff, tmp2,
2797                                                  &adapter->errors, list) {
2798                                 dma_unmap_single(dev, error_buff->dma,
2799                                                  error_buff->len,
2800                                                  DMA_FROM_DEVICE);
2801                                 kfree(error_buff->buff);
2802                                 list_del(&error_buff->list);
2803                                 kfree(error_buff);
2804                         }
2805                         spin_unlock_irqrestore(&adapter->error_list_lock,
2806                                                flags2);
2807                         break;
2808                 }
2809                 list_del(&inflight_cmd->list);
2810                 kfree(inflight_cmd);
2811         }
2812         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2813 }
2814
2815 static void ibmvnic_xport_event(struct work_struct *work)
2816 {
2817         struct ibmvnic_adapter *adapter = container_of(work,
2818                                                        struct ibmvnic_adapter,
2819                                                        ibmvnic_xport);
2820         struct device *dev = &adapter->vdev->dev;
2821         long rc;
2822
2823         ibmvnic_free_inflight(adapter);
2824         release_sub_crqs(adapter);
2825         if (adapter->migrated) {
2826                 rc = ibmvnic_reenable_crq_queue(adapter);
2827                 if (rc)
2828                         dev_err(dev, "Error after enable rc=%ld\n", rc);
2829                 adapter->migrated = false;
2830                 rc = ibmvnic_send_crq_init(adapter);
2831                 if (rc)
2832                         dev_err(dev, "Error sending init rc=%ld\n", rc);
2833         }
2834 }
2835
2836 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
2837                                struct ibmvnic_adapter *adapter)
2838 {
2839         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
2840         struct net_device *netdev = adapter->netdev;
2841         struct device *dev = &adapter->vdev->dev;
2842         long rc;
2843
2844         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
2845                    ((unsigned long int *)crq)[0],
2846                    ((unsigned long int *)crq)[1]);
2847         switch (gen_crq->first) {
2848         case IBMVNIC_CRQ_INIT_RSP:
2849                 switch (gen_crq->cmd) {
2850                 case IBMVNIC_CRQ_INIT:
2851                         dev_info(dev, "Partner initialized\n");
2852                         /* Send back a response */
2853                         rc = ibmvnic_send_crq_init_complete(adapter);
2854                         if (!rc)
2855                                 schedule_work(&adapter->vnic_crq_init);
2856                         else
2857                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
2858                         break;
2859                 case IBMVNIC_CRQ_INIT_COMPLETE:
2860                         dev_info(dev, "Partner initialization complete\n");
2861                         send_version_xchg(adapter);
2862                         break;
2863                 default:
2864                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
2865                 }
2866                 return;
2867         case IBMVNIC_CRQ_XPORT_EVENT:
2868                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
2869                         dev_info(dev, "Re-enabling adapter\n");
2870                         adapter->migrated = true;
2871                         schedule_work(&adapter->ibmvnic_xport);
2872                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
2873                         dev_info(dev, "Backing device failover detected\n");
2874                         netif_carrier_off(netdev);
2875                         adapter->failover = true;
2876                 } else {
2877                         /* The adapter lost the connection */
2878                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
2879                                 gen_crq->cmd);
2880                         schedule_work(&adapter->ibmvnic_xport);
2881                 }
2882                 return;
2883         case IBMVNIC_CRQ_CMD_RSP:
2884                 break;
2885         default:
2886                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
2887                         gen_crq->first);
2888                 return;
2889         }
2890
2891         switch (gen_crq->cmd) {
2892         case VERSION_EXCHANGE_RSP:
2893                 rc = crq->version_exchange_rsp.rc.code;
2894                 if (rc) {
2895                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
2896                         break;
2897                 }
2898                 dev_info(dev, "Partner protocol version is %d\n",
2899                          crq->version_exchange_rsp.version);
2900                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
2901                     ibmvnic_version)
2902                         ibmvnic_version =
2903                             be16_to_cpu(crq->version_exchange_rsp.version);
2904                 send_cap_queries(adapter);
2905                 break;
2906         case QUERY_CAPABILITY_RSP:
2907                 handle_query_cap_rsp(crq, adapter);
2908                 break;
2909         case QUERY_MAP_RSP:
2910                 handle_query_map_rsp(crq, adapter);
2911                 break;
2912         case REQUEST_MAP_RSP:
2913                 handle_request_map_rsp(crq, adapter);
2914                 break;
2915         case REQUEST_UNMAP_RSP:
2916                 handle_request_unmap_rsp(crq, adapter);
2917                 break;
2918         case REQUEST_CAPABILITY_RSP:
2919                 handle_request_cap_rsp(crq, adapter);
2920                 break;
2921         case LOGIN_RSP:
2922                 netdev_dbg(netdev, "Got Login Response\n");
2923                 handle_login_rsp(crq, adapter);
2924                 break;
2925         case LOGICAL_LINK_STATE_RSP:
2926                 netdev_dbg(netdev, "Got Logical Link State Response\n");
2927                 adapter->logical_link_state =
2928                     crq->logical_link_state_rsp.link_state;
2929                 break;
2930         case LINK_STATE_INDICATION:
2931                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
2932                 adapter->phys_link_state =
2933                     crq->link_state_indication.phys_link_state;
2934                 adapter->logical_link_state =
2935                     crq->link_state_indication.logical_link_state;
2936                 break;
2937         case CHANGE_MAC_ADDR_RSP:
2938                 netdev_dbg(netdev, "Got MAC address change Response\n");
2939                 handle_change_mac_rsp(crq, adapter);
2940                 break;
2941         case ERROR_INDICATION:
2942                 netdev_dbg(netdev, "Got Error Indication\n");
2943                 handle_error_indication(crq, adapter);
2944                 break;
2945         case REQUEST_ERROR_RSP:
2946                 netdev_dbg(netdev, "Got Error Detail Response\n");
2947                 handle_error_info_rsp(crq, adapter);
2948                 break;
2949         case REQUEST_STATISTICS_RSP:
2950                 netdev_dbg(netdev, "Got Statistics Response\n");
2951                 complete(&adapter->stats_done);
2952                 break;
2953         case QUERY_IP_OFFLOAD_RSP:
2954                 netdev_dbg(netdev, "Got Query IP offload Response\n");
2955                 handle_query_ip_offload_rsp(adapter);
2956                 break;
2957         case MULTICAST_CTRL_RSP:
2958                 netdev_dbg(netdev, "Got multicast control Response\n");
2959                 break;
2960         case CONTROL_IP_OFFLOAD_RSP:
2961                 netdev_dbg(netdev, "Got Control IP offload Response\n");
2962                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
2963                                  sizeof(adapter->ip_offload_ctrl),
2964                                  DMA_TO_DEVICE);
2965                 complete(&adapter->init_done);
2966                 break;
2967         case COLLECT_FW_TRACE_RSP:
2968                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
2969                 complete(&adapter->fw_done);
2970                 break;
2971         default:
2972                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
2973                            gen_crq->cmd);
2974         }
2975 }
2976
2977 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
2978 {
2979         struct ibmvnic_adapter *adapter = instance;
2980         unsigned long flags;
2981
2982         spin_lock_irqsave(&adapter->crq.lock, flags);
2983         vio_disable_interrupts(adapter->vdev);
2984         tasklet_schedule(&adapter->tasklet);
2985         spin_unlock_irqrestore(&adapter->crq.lock, flags);
2986         return IRQ_HANDLED;
2987 }
2988
2989 static void ibmvnic_tasklet(void *data)
2990 {
2991         struct ibmvnic_adapter *adapter = data;
2992         struct ibmvnic_crq_queue *queue = &adapter->crq;
2993         struct vio_dev *vdev = adapter->vdev;
2994         union ibmvnic_crq *crq;
2995         unsigned long flags;
2996         bool done = false;
2997
2998         spin_lock_irqsave(&queue->lock, flags);
2999         vio_disable_interrupts(vdev);
3000         while (!done) {
3001                 /* Pull all the valid messages off the CRQ */
3002                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3003                         ibmvnic_handle_crq(crq, adapter);
3004                         crq->generic.first = 0;
3005                 }
3006                 vio_enable_interrupts(vdev);
3007                 crq = ibmvnic_next_crq(adapter);
3008                 if (crq) {
3009                         vio_disable_interrupts(vdev);
3010                         ibmvnic_handle_crq(crq, adapter);
3011                         crq->generic.first = 0;
3012                 } else {
3013                         /* remain in tasklet until all
3014                          * capabilities responses are received
3015                          */
3016                         if (!adapter->wait_capability)
3017                                 done = true;
3018                 }
3019         }
3020         /* if capabilities CRQ's were sent in this tasklet, the following
3021          * tasklet must wait until all responses are received
3022          */
3023         if (atomic_read(&adapter->running_cap_crqs) != 0)
3024                 adapter->wait_capability = true;
3025         spin_unlock_irqrestore(&queue->lock, flags);
3026 }
3027
3028 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3029 {
3030         struct vio_dev *vdev = adapter->vdev;
3031         int rc;
3032
3033         do {
3034                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3035         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3036
3037         if (rc)
3038                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3039
3040         return rc;
3041 }
3042
3043 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3044 {
3045         struct ibmvnic_crq_queue *crq = &adapter->crq;
3046         struct device *dev = &adapter->vdev->dev;
3047         struct vio_dev *vdev = adapter->vdev;
3048         int rc;
3049
3050         /* Close the CRQ */
3051         do {
3052                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3053         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3054
3055         /* Clean out the queue */
3056         memset(crq->msgs, 0, PAGE_SIZE);
3057         crq->cur = 0;
3058
3059         /* And re-open it again */
3060         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3061                                 crq->msg_token, PAGE_SIZE);
3062
3063         if (rc == H_CLOSED)
3064                 /* Adapter is good, but other end is not ready */
3065                 dev_warn(dev, "Partner adapter not ready\n");
3066         else if (rc != 0)
3067                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3068
3069         return rc;
3070 }
3071
3072 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3073 {
3074         struct ibmvnic_crq_queue *crq = &adapter->crq;
3075         struct vio_dev *vdev = adapter->vdev;
3076         long rc;
3077
3078         if (!crq->msgs)
3079                 return;
3080
3081         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3082         free_irq(vdev->irq, adapter);
3083         tasklet_kill(&adapter->tasklet);
3084         do {
3085                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3086         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3087
3088         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3089                          DMA_BIDIRECTIONAL);
3090         free_page((unsigned long)crq->msgs);
3091         crq->msgs = NULL;
3092 }
3093
3094 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3095 {
3096         struct ibmvnic_crq_queue *crq = &adapter->crq;
3097         struct device *dev = &adapter->vdev->dev;
3098         struct vio_dev *vdev = adapter->vdev;
3099         int rc, retrc = -ENOMEM;
3100
3101         if (crq->msgs)
3102                 return 0;
3103
3104         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3105         /* Should we allocate more than one page? */
3106
3107         if (!crq->msgs)
3108                 return -ENOMEM;
3109
3110         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3111         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3112                                         DMA_BIDIRECTIONAL);
3113         if (dma_mapping_error(dev, crq->msg_token))
3114                 goto map_failed;
3115
3116         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3117                                 crq->msg_token, PAGE_SIZE);
3118
3119         if (rc == H_RESOURCE)
3120                 /* maybe kexecing and resource is busy. try a reset */
3121                 rc = ibmvnic_reset_crq(adapter);
3122         retrc = rc;
3123
3124         if (rc == H_CLOSED) {
3125                 dev_warn(dev, "Partner adapter not ready\n");
3126         } else if (rc) {
3127                 dev_warn(dev, "Error %d opening adapter\n", rc);
3128                 goto reg_crq_failed;
3129         }
3130
3131         retrc = 0;
3132
3133         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3134                      (unsigned long)adapter);
3135
3136         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3137         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3138                          adapter);
3139         if (rc) {
3140                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3141                         vdev->irq, rc);
3142                 goto req_irq_failed;
3143         }
3144
3145         rc = vio_enable_interrupts(vdev);
3146         if (rc) {
3147                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3148                 goto req_irq_failed;
3149         }
3150
3151         crq->cur = 0;
3152         spin_lock_init(&crq->lock);
3153
3154         return retrc;
3155
3156 req_irq_failed:
3157         tasklet_kill(&adapter->tasklet);
3158         do {
3159                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3160         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3161 reg_crq_failed:
3162         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3163 map_failed:
3164         free_page((unsigned long)crq->msgs);
3165         crq->msgs = NULL;
3166         return retrc;
3167 }
3168
3169 static void handle_crq_init_rsp(struct work_struct *work)
3170 {
3171         struct ibmvnic_adapter *adapter = container_of(work,
3172                                                        struct ibmvnic_adapter,
3173                                                        vnic_crq_init);
3174         struct device *dev = &adapter->vdev->dev;
3175         struct net_device *netdev = adapter->netdev;
3176         unsigned long timeout = msecs_to_jiffies(30000);
3177         bool restart = false;
3178         int rc;
3179
3180         if (adapter->failover) {
3181                 release_sub_crqs(adapter);
3182                 if (netif_running(netdev)) {
3183                         netif_tx_disable(netdev);
3184                         ibmvnic_close(netdev);
3185                         restart = true;
3186                 }
3187         }
3188
3189         reinit_completion(&adapter->init_done);
3190         send_version_xchg(adapter);
3191         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3192                 dev_err(dev, "Passive init timeout\n");
3193                 goto task_failed;
3194         }
3195
3196         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3197
3198         if (adapter->failover) {
3199                 adapter->failover = false;
3200                 if (restart) {
3201                         rc = ibmvnic_open(netdev);
3202                         if (rc)
3203                                 goto restart_failed;
3204                 }
3205                 netif_carrier_on(netdev);
3206                 return;
3207         }
3208
3209         rc = register_netdev(netdev);
3210         if (rc) {
3211                 dev_err(dev,
3212                         "failed to register netdev rc=%d\n", rc);
3213                 goto register_failed;
3214         }
3215         dev_info(dev, "ibmvnic registered\n");
3216
3217         return;
3218
3219 restart_failed:
3220         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3221 register_failed:
3222         release_sub_crqs(adapter);
3223 task_failed:
3224         dev_err(dev, "Passive initialization was not successful\n");
3225 }
3226
3227 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3228 {
3229         struct device *dev = &adapter->vdev->dev;
3230         unsigned long timeout = msecs_to_jiffies(30000);
3231         int rc;
3232
3233         rc = init_crq_queue(adapter);
3234         if (rc) {
3235                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3236                 return rc;
3237         }
3238
3239         adapter->stats_token = dma_map_single(dev, &adapter->stats,
3240                                       sizeof(struct ibmvnic_statistics),
3241                                       DMA_FROM_DEVICE);
3242         if (dma_mapping_error(dev, adapter->stats_token)) {
3243                 release_crq_queue(adapter);
3244                 dev_err(dev, "Couldn't map stats buffer\n");
3245                 return -ENOMEM;
3246         }
3247
3248         init_completion(&adapter->init_done);
3249         ibmvnic_send_crq_init(adapter);
3250         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3251                 dev_err(dev, "Initialization sequence timed out\n");
3252                 release_crq_queue(adapter);
3253                 return -1;
3254         }
3255
3256         return 0;
3257 }
3258
3259 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3260 {
3261         struct ibmvnic_adapter *adapter;
3262         struct net_device *netdev;
3263         unsigned char *mac_addr_p;
3264         int rc;
3265
3266         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3267                 dev->unit_address);
3268
3269         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3270                                                         VETH_MAC_ADDR, NULL);
3271         if (!mac_addr_p) {
3272                 dev_err(&dev->dev,
3273                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3274                         __FILE__, __LINE__);
3275                 return 0;
3276         }
3277
3278         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3279                                    IBMVNIC_MAX_TX_QUEUES);
3280         if (!netdev)
3281                 return -ENOMEM;
3282
3283         adapter = netdev_priv(netdev);
3284         dev_set_drvdata(&dev->dev, netdev);
3285         adapter->vdev = dev;
3286         adapter->netdev = netdev;
3287         adapter->failover = false;
3288
3289         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3290         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3291         netdev->irq = dev->irq;
3292         netdev->netdev_ops = &ibmvnic_netdev_ops;
3293         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3294         SET_NETDEV_DEV(netdev, &dev->dev);
3295
3296         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3297         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3298
3299         spin_lock_init(&adapter->stats_lock);
3300
3301         INIT_LIST_HEAD(&adapter->errors);
3302         INIT_LIST_HEAD(&adapter->inflight);
3303         spin_lock_init(&adapter->error_list_lock);
3304         spin_lock_init(&adapter->inflight_lock);
3305
3306         rc = ibmvnic_init(adapter);
3307         if (rc) {
3308                 free_netdev(netdev);
3309                 return rc;
3310         }
3311
3312         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3313         adapter->is_closed = false;
3314
3315         rc = register_netdev(netdev);
3316         if (rc) {
3317                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3318                 free_netdev(netdev);
3319                 return rc;
3320         }
3321         dev_info(&dev->dev, "ibmvnic registered\n");
3322
3323         return 0;
3324 }
3325
3326 static int ibmvnic_remove(struct vio_dev *dev)
3327 {
3328         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3329
3330         unregister_netdev(netdev);
3331         free_netdev(netdev);
3332         dev_set_drvdata(&dev->dev, NULL);
3333
3334         return 0;
3335 }
3336
3337 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3338 {
3339         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3340         struct ibmvnic_adapter *adapter;
3341         struct iommu_table *tbl;
3342         unsigned long ret = 0;
3343         int i;
3344
3345         tbl = get_iommu_table_base(&vdev->dev);
3346
3347         /* netdev inits at probe time along with the structures we need below*/
3348         if (!netdev)
3349                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3350
3351         adapter = netdev_priv(netdev);
3352
3353         ret += PAGE_SIZE; /* the crq message queue */
3354         ret += adapter->bounce_buffer_size;
3355         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3356
3357         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3358                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3359
3360         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3361              i++)
3362                 ret += adapter->rx_pool[i].size *
3363                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3364
3365         return ret;
3366 }
3367
3368 static int ibmvnic_resume(struct device *dev)
3369 {
3370         struct net_device *netdev = dev_get_drvdata(dev);
3371         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3372         int i;
3373
3374         /* kick the interrupt handlers just in case we lost an interrupt */
3375         for (i = 0; i < adapter->req_rx_queues; i++)
3376                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3377                                      adapter->rx_scrq[i]);
3378
3379         return 0;
3380 }
3381
3382 static struct vio_device_id ibmvnic_device_table[] = {
3383         {"network", "IBM,vnic"},
3384         {"", "" }
3385 };
3386 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3387
3388 static const struct dev_pm_ops ibmvnic_pm_ops = {
3389         .resume = ibmvnic_resume
3390 };
3391
3392 static struct vio_driver ibmvnic_driver = {
3393         .id_table       = ibmvnic_device_table,
3394         .probe          = ibmvnic_probe,
3395         .remove         = ibmvnic_remove,
3396         .get_desired_dma = ibmvnic_get_desired_dma,
3397         .name           = ibmvnic_driver_name,
3398         .pm             = &ibmvnic_pm_ops,
3399 };
3400
3401 /* module functions */
3402 static int __init ibmvnic_module_init(void)
3403 {
3404         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3405                 IBMVNIC_DRIVER_VERSION);
3406
3407         return vio_register_driver(&ibmvnic_driver);
3408 }
3409
3410 static void __exit ibmvnic_module_exit(void)
3411 {
3412         vio_unregister_driver(&ibmvnic_driver);
3413 }
3414
3415 module_init(ibmvnic_module_init);
3416 module_exit(ibmvnic_module_exit);