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/debugfs.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  98                        union sub_crq *sub_crq);
  99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 101 static int enable_scrq_irq(struct ibmvnic_adapter *,
 102                            struct ibmvnic_sub_crq_queue *);
 103 static int disable_scrq_irq(struct ibmvnic_adapter *,
 104                             struct ibmvnic_sub_crq_queue *);
 105 static int pending_scrq(struct ibmvnic_adapter *,
 106                         struct ibmvnic_sub_crq_queue *);
 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 108                                         struct ibmvnic_sub_crq_queue *);
 109 static int ibmvnic_poll(struct napi_struct *napi, int data);
 110 static void send_map_query(struct ibmvnic_adapter *adapter);
 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 113
 114 struct ibmvnic_stat {
 115         char name[ETH_GSTRING_LEN];
 116         int offset;
 117 };
 118
 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 120                              offsetof(struct ibmvnic_statistics, stat))
 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 122
 123 static const struct ibmvnic_stat ibmvnic_stats[] = {
 124         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 125         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 126         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 127         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 128         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 129         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 130         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 131         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 132         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 133         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 134         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 135         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 136         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 137         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 138         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 139         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 140         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 141         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 142         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 143         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 144         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 145         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 146 };
 147
 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 149                           unsigned long length, unsigned long *number,
 150                           unsigned long *irq)
 151 {
 152         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 153         long rc;
 154
 155         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 156         *number = retbuf[0];
 157         *irq = retbuf[1];
 158
 159         return rc;
 160 }
 161
 162 /* net_device_ops functions */
 163
 164 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 165                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 166                          int buff_size, int active)
 167 {
 168         netdev_dbg(adapter->netdev,
 169                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 170                    index, num, buff_size);
 171         rx_pool->size = num;
 172         rx_pool->index = index;
 173         rx_pool->buff_size = buff_size;
 174         rx_pool->active = active;
 175 }
 176
 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 178                                 struct ibmvnic_long_term_buff *ltb, int size)
 179 {
 180         struct device *dev = &adapter->vdev->dev;
 181
 182         ltb->size = size;
 183         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 184                                        GFP_KERNEL);
 185
 186         if (!ltb->buff) {
 187                 dev_err(dev, "Couldn't alloc long term buffer\n");
 188                 return -ENOMEM;
 189         }
 190         ltb->map_id = adapter->map_id;
 191         adapter->map_id++;
 192         send_request_map(adapter, ltb->addr,
 193                          ltb->size, ltb->map_id);
 194         init_completion(&adapter->fw_done);
 195         wait_for_completion(&adapter->fw_done);
 196         return 0;
 197 }
 198
 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 200                                 struct ibmvnic_long_term_buff *ltb)
 201 {
 202         struct device *dev = &adapter->vdev->dev;
 203
 204         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 205         if (!adapter->failover)
 206                 send_request_unmap(adapter, ltb->map_id);
 207 }
 208
 209 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 210                          struct ibmvnic_rx_pool *pool)
 211 {
 212         struct device *dev = &adapter->vdev->dev;
 213         int i;
 214
 215         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 216         if (!pool->free_map)
 217                 return -ENOMEM;
 218
 219         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 220                                 GFP_KERNEL);
 221
 222         if (!pool->rx_buff) {
 223                 dev_err(dev, "Couldn't alloc rx buffers\n");
 224                 kfree(pool->free_map);
 225                 return -ENOMEM;
 226         }
 227
 228         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 229                                  pool->size * pool->buff_size)) {
 230                 kfree(pool->free_map);
 231                 kfree(pool->rx_buff);
 232                 return -ENOMEM;
 233         }
 234
 235         for (i = 0; i < pool->size; ++i)
 236                 pool->free_map[i] = i;
 237
 238         atomic_set(&pool->available, 0);
 239         pool->next_alloc = 0;
 240         pool->next_free = 0;
 241
 242         return 0;
 243 }
 244
 245 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 246                               struct ibmvnic_rx_pool *pool)
 247 {
 248         int count = pool->size - atomic_read(&pool->available);
 249         struct device *dev = &adapter->vdev->dev;
 250         int buffers_added = 0;
 251         unsigned long lpar_rc;
 252         union sub_crq sub_crq;
 253         struct sk_buff *skb;
 254         unsigned int offset;
 255         dma_addr_t dma_addr;
 256         unsigned char *dst;
 257         u64 *handle_array;
 258         int shift = 0;
 259         int index;
 260         int i;
 261
 262         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 263                                       be32_to_cpu(adapter->login_rsp_buf->
 264                                       off_rxadd_subcrqs));
 265
 266         for (i = 0; i < count; ++i) {
 267                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 268                 if (!skb) {
 269                         dev_err(dev, "Couldn't replenish rx buff\n");
 270                         adapter->replenish_no_mem++;
 271                         break;
 272                 }
 273
 274                 index = pool->free_map[pool->next_free];
 275
 276                 if (pool->rx_buff[index].skb)
 277                         dev_err(dev, "Inconsistent free_map!\n");
 278
 279                 /* Copy the skb to the long term mapped DMA buffer */
 280                 offset = index * pool->buff_size;
 281                 dst = pool->long_term_buff.buff + offset;
 282                 memset(dst, 0, pool->buff_size);
 283                 dma_addr = pool->long_term_buff.addr + offset;
 284                 pool->rx_buff[index].data = dst;
 285
 286                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 287                 pool->rx_buff[index].dma = dma_addr;
 288                 pool->rx_buff[index].skb = skb;
 289                 pool->rx_buff[index].pool_index = pool->index;
 290                 pool->rx_buff[index].size = pool->buff_size;
 291
 292                 memset(&sub_crq, 0, sizeof(sub_crq));
 293                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 294                 sub_crq.rx_add.correlator =
 295                     cpu_to_be64((u64)&pool->rx_buff[index]);
 296                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 297                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 298
 299                 /* The length field of the sCRQ is defined to be 24 bits so the
 300                  * buffer size needs to be left shifted by a byte before it is
 301                  * converted to big endian to prevent the last byte from being
 302                  * truncated.
 303                  */
 304 #ifdef __LITTLE_ENDIAN__
 305                 shift = 8;
 306 #endif
 307                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 308
 309                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 310                                       &sub_crq);
 311                 if (lpar_rc != H_SUCCESS)
 312                         goto failure;
 313
 314                 buffers_added++;
 315                 adapter->replenish_add_buff_success++;
 316                 pool->next_free = (pool->next_free + 1) % pool->size;
 317         }
 318         atomic_add(buffers_added, &pool->available);
 319         return;
 320
 321 failure:
 322         dev_info(dev, "replenish pools failure\n");
 323         pool->free_map[pool->next_free] = index;
 324         pool->rx_buff[index].skb = NULL;
 325         if (!dma_mapping_error(dev, dma_addr))
 326                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 327                                  DMA_FROM_DEVICE);
 328
 329         dev_kfree_skb_any(skb);
 330         adapter->replenish_add_buff_failure++;
 331         atomic_add(buffers_added, &pool->available);
 332 }
 333
 334 static void replenish_pools(struct ibmvnic_adapter *adapter)
 335 {
 336         int i;
 337
 338         if (adapter->migrated)
 339                 return;
 340
 341         adapter->replenish_task_cycles++;
 342         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 343              i++) {
 344                 if (adapter->rx_pool[i].active)
 345                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 346         }
 347 }
 348
 349 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 350                          struct ibmvnic_rx_pool *pool)
 351 {
 352         int i;
 353
 354         kfree(pool->free_map);
 355         pool->free_map = NULL;
 356
 357         if (!pool->rx_buff)
 358                 return;
 359
 360         for (i = 0; i < pool->size; i++) {
 361                 if (pool->rx_buff[i].skb) {
 362                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 363                         pool->rx_buff[i].skb = NULL;
 364                 }
 365         }
 366         kfree(pool->rx_buff);
 367         pool->rx_buff = NULL;
 368 }
 369
 370 static int ibmvnic_open(struct net_device *netdev)
 371 {
 372         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 373         struct device *dev = &adapter->vdev->dev;
 374         struct ibmvnic_tx_pool *tx_pool;
 375         union ibmvnic_crq crq;
 376         int rxadd_subcrqs;
 377         u64 *size_array;
 378         int tx_subcrqs;
 379         int i, j;
 380
 381         rxadd_subcrqs =
 382             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 383         tx_subcrqs =
 384             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 385         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 386                                   be32_to_cpu(adapter->login_rsp_buf->
 387                                               off_rxadd_buff_size));
 388         adapter->map_id = 1;
 389         adapter->napi = kcalloc(adapter->req_rx_queues,
 390                                 sizeof(struct napi_struct), GFP_KERNEL);
 391         if (!adapter->napi)
 392                 goto alloc_napi_failed;
 393         for (i = 0; i < adapter->req_rx_queues; i++) {
 394                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 395                                NAPI_POLL_WEIGHT);
 396                 napi_enable(&adapter->napi[i]);
 397         }
 398         adapter->rx_pool =
 399             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 400
 401         if (!adapter->rx_pool)
 402                 goto rx_pool_arr_alloc_failed;
 403         send_map_query(adapter);
 404         for (i = 0; i < rxadd_subcrqs; i++) {
 405                 init_rx_pool(adapter, &adapter->rx_pool[i],
 406                              IBMVNIC_BUFFS_PER_POOL, i,
 407                              be64_to_cpu(size_array[i]), 1);
 408                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 409                         dev_err(dev, "Couldn't alloc rx pool\n");
 410                         goto rx_pool_alloc_failed;
 411                 }
 412         }
 413         adapter->tx_pool =
 414             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 415
 416         if (!adapter->tx_pool)
 417                 goto tx_pool_arr_alloc_failed;
 418         for (i = 0; i < tx_subcrqs; i++) {
 419                 tx_pool = &adapter->tx_pool[i];
 420                 tx_pool->tx_buff =
 421                     kcalloc(adapter->max_tx_entries_per_subcrq,
 422                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 423                 if (!tx_pool->tx_buff)
 424                         goto tx_pool_alloc_failed;
 425
 426                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 427                                          adapter->max_tx_entries_per_subcrq *
 428                                          adapter->req_mtu))
 429                         goto tx_ltb_alloc_failed;
 430
 431                 tx_pool->free_map =
 432                     kcalloc(adapter->max_tx_entries_per_subcrq,
 433                             sizeof(int), GFP_KERNEL);
 434                 if (!tx_pool->free_map)
 435                         goto tx_fm_alloc_failed;
 436
 437                 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
 438                         tx_pool->free_map[j] = j;
 439
 440                 tx_pool->consumer_index = 0;
 441                 tx_pool->producer_index = 0;
 442         }
 443         adapter->bounce_buffer_size =
 444             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 445         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 446                                          GFP_KERNEL);
 447         if (!adapter->bounce_buffer)
 448                 goto bounce_alloc_failed;
 449
 450         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 451                                                     adapter->bounce_buffer_size,
 452                                                     DMA_TO_DEVICE);
 453         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 454                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 455                 goto bounce_map_failed;
 456         }
 457         replenish_pools(adapter);
 458
 459         /* We're ready to receive frames, enable the sub-crq interrupts and
 460          * set the logical link state to up
 461          */
 462         for (i = 0; i < adapter->req_rx_queues; i++)
 463                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 464
 465         for (i = 0; i < adapter->req_tx_queues; i++)
 466                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 467
 468         memset(&crq, 0, sizeof(crq));
 469         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 470         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 471         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 472         ibmvnic_send_crq(adapter, &crq);
 473
 474         netif_tx_start_all_queues(netdev);
 475
 476         return 0;
 477
 478 bounce_map_failed:
 479         kfree(adapter->bounce_buffer);
 480 bounce_alloc_failed:
 481         i = tx_subcrqs - 1;
 482         kfree(adapter->tx_pool[i].free_map);
 483 tx_fm_alloc_failed:
 484         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 485 tx_ltb_alloc_failed:
 486         kfree(adapter->tx_pool[i].tx_buff);
 487 tx_pool_alloc_failed:
 488         for (j = 0; j < i; j++) {
 489                 kfree(adapter->tx_pool[j].tx_buff);
 490                 free_long_term_buff(adapter,
 491                                     &adapter->tx_pool[j].long_term_buff);
 492                 kfree(adapter->tx_pool[j].free_map);
 493         }
 494         kfree(adapter->tx_pool);
 495         adapter->tx_pool = NULL;
 496 tx_pool_arr_alloc_failed:
 497         i = rxadd_subcrqs;
 498 rx_pool_alloc_failed:
 499         for (j = 0; j < i; j++) {
 500                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 501                 free_long_term_buff(adapter,
 502                                     &adapter->rx_pool[j].long_term_buff);
 503         }
 504         kfree(adapter->rx_pool);
 505         adapter->rx_pool = NULL;
 506 rx_pool_arr_alloc_failed:
 507         for (i = 0; i < adapter->req_rx_queues; i++)
 508                 napi_enable(&adapter->napi[i]);
 509 alloc_napi_failed:
 510         return -ENOMEM;
 511 }
 512
 513 static int ibmvnic_close(struct net_device *netdev)
 514 {
 515         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 516         struct device *dev = &adapter->vdev->dev;
 517         union ibmvnic_crq crq;
 518         int i;
 519
 520         adapter->closing = true;
 521
 522         for (i = 0; i < adapter->req_rx_queues; i++)
 523                 napi_disable(&adapter->napi[i]);
 524
 525         if (!adapter->failover)
 526                 netif_tx_stop_all_queues(netdev);
 527
 528         if (adapter->bounce_buffer) {
 529                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 530                         dma_unmap_single(&adapter->vdev->dev,
 531                                          adapter->bounce_buffer_dma,
 532                                          adapter->bounce_buffer_size,
 533                                          DMA_BIDIRECTIONAL);
 534                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 535                 }
 536                 kfree(adapter->bounce_buffer);
 537                 adapter->bounce_buffer = NULL;
 538         }
 539
 540         memset(&crq, 0, sizeof(crq));
 541         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 542         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 543         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 544         ibmvnic_send_crq(adapter, &crq);
 545
 546         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 547              i++) {
 548                 kfree(adapter->tx_pool[i].tx_buff);
 549                 free_long_term_buff(adapter,
 550                                     &adapter->tx_pool[i].long_term_buff);
 551                 kfree(adapter->tx_pool[i].free_map);
 552         }
 553         kfree(adapter->tx_pool);
 554         adapter->tx_pool = NULL;
 555
 556         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 557              i++) {
 558                 free_rx_pool(adapter, &adapter->rx_pool[i]);
 559                 free_long_term_buff(adapter,
 560                                     &adapter->rx_pool[i].long_term_buff);
 561         }
 562         kfree(adapter->rx_pool);
 563         adapter->rx_pool = NULL;
 564
 565         adapter->closing = false;
 566
 567         return 0;
 568 }
 569
 570 /**
 571  * build_hdr_data - creates L2/L3/L4 header data buffer
 572  * @hdr_field - bitfield determining needed headers
 573  * @skb - socket buffer
 574  * @hdr_len - array of header lengths
 575  * @tot_len - total length of data
 576  *
 577  * Reads hdr_field to determine which headers are needed by firmware.
 578  * Builds a buffer containing these headers.  Saves individual header
 579  * lengths and total buffer length to be used to build descriptors.
 580  */
 581 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 582                           int *hdr_len, u8 *hdr_data)
 583 {
 584         int len = 0;
 585         u8 *hdr;
 586
 587         hdr_len[0] = sizeof(struct ethhdr);
 588
 589         if (skb->protocol == htons(ETH_P_IP)) {
 590                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 591                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 592                         hdr_len[2] = tcp_hdrlen(skb);
 593                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 594                         hdr_len[2] = sizeof(struct udphdr);
 595         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 596                 hdr_len[1] = sizeof(struct ipv6hdr);
 597                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 598                         hdr_len[2] = tcp_hdrlen(skb);
 599                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 600                         hdr_len[2] = sizeof(struct udphdr);
 601         }
 602
 603         memset(hdr_data, 0, 120);
 604         if ((hdr_field >> 6) & 1) {
 605                 hdr = skb_mac_header(skb);
 606                 memcpy(hdr_data, hdr, hdr_len[0]);
 607                 len += hdr_len[0];
 608         }
 609
 610         if ((hdr_field >> 5) & 1) {
 611                 hdr = skb_network_header(skb);
 612                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 613                 len += hdr_len[1];
 614         }
 615
 616         if ((hdr_field >> 4) & 1) {
 617                 hdr = skb_transport_header(skb);
 618                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 619                 len += hdr_len[2];
 620         }
 621         return len;
 622 }
 623
 624 /**
 625  * create_hdr_descs - create header and header extension descriptors
 626  * @hdr_field - bitfield determining needed headers
 627  * @data - buffer containing header data
 628  * @len - length of data buffer
 629  * @hdr_len - array of individual header lengths
 630  * @scrq_arr - descriptor array
 631  *
 632  * Creates header and, if needed, header extension descriptors and
 633  * places them in a descriptor array, scrq_arr
 634  */
 635
 636 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 637                              union sub_crq *scrq_arr)
 638 {
 639         union sub_crq hdr_desc;
 640         int tmp_len = len;
 641         u8 *data, *cur;
 642         int tmp;
 643
 644         while (tmp_len > 0) {
 645                 cur = hdr_data + len - tmp_len;
 646
 647                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 648                 if (cur != hdr_data) {
 649                         data = hdr_desc.hdr_ext.data;
 650                         tmp = tmp_len > 29 ? 29 : tmp_len;
 651                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 652                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 653                         hdr_desc.hdr_ext.len = tmp;
 654                 } else {
 655                         data = hdr_desc.hdr.data;
 656                         tmp = tmp_len > 24 ? 24 : tmp_len;
 657                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 658                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 659                         hdr_desc.hdr.len = tmp;
 660                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 661                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 662                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 663                         hdr_desc.hdr.flag = hdr_field << 1;
 664                 }
 665                 memcpy(data, cur, tmp);
 666                 tmp_len -= tmp;
 667                 *scrq_arr = hdr_desc;
 668                 scrq_arr++;
 669         }
 670 }
 671
 672 /**
 673  * build_hdr_descs_arr - build a header descriptor array
 674  * @skb - socket buffer
 675  * @num_entries - number of descriptors to be sent
 676  * @subcrq - first TX descriptor
 677  * @hdr_field - bit field determining which headers will be sent
 678  *
 679  * This function will build a TX descriptor array with applicable
 680  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 681  */
 682
 683 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 684                                 int *num_entries, u8 hdr_field)
 685 {
 686         int hdr_len[3] = {0, 0, 0};
 687         int tot_len, len;
 688         u8 *hdr_data = txbuff->hdr_data;
 689
 690         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 691                                  txbuff->hdr_data);
 692         len = tot_len;
 693         len -= 24;
 694         if (len > 0)
 695                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 696         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 697                          txbuff->indir_arr + 1);
 698 }
 699
 700 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 701 {
 702         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 703         int queue_num = skb_get_queue_mapping(skb);
 704         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 705         struct device *dev = &adapter->vdev->dev;
 706         struct ibmvnic_tx_buff *tx_buff = NULL;
 707         struct ibmvnic_tx_pool *tx_pool;
 708         unsigned int tx_send_failed = 0;
 709         unsigned int tx_map_failed = 0;
 710         unsigned int tx_dropped = 0;
 711         unsigned int tx_packets = 0;
 712         unsigned int tx_bytes = 0;
 713         dma_addr_t data_dma_addr;
 714         struct netdev_queue *txq;
 715         bool used_bounce = false;
 716         unsigned long lpar_rc;
 717         union sub_crq tx_crq;
 718         unsigned int offset;
 719         int num_entries = 1;
 720         unsigned char *dst;
 721         u64 *handle_array;
 722         int index = 0;
 723         int ret = 0;
 724
 725         tx_pool = &adapter->tx_pool[queue_num];
 726         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 727         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 728                                    be32_to_cpu(adapter->login_rsp_buf->
 729                                                off_txsubm_subcrqs));
 730         if (adapter->migrated) {
 731                 tx_send_failed++;
 732                 tx_dropped++;
 733                 ret = NETDEV_TX_BUSY;
 734                 goto out;
 735         }
 736
 737         index = tx_pool->free_map[tx_pool->consumer_index];
 738         offset = index * adapter->req_mtu;
 739         dst = tx_pool->long_term_buff.buff + offset;
 740         memset(dst, 0, adapter->req_mtu);
 741         skb_copy_from_linear_data(skb, dst, skb->len);
 742         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 743
 744         tx_pool->consumer_index =
 745             (tx_pool->consumer_index + 1) %
 746                 adapter->max_tx_entries_per_subcrq;
 747
 748         tx_buff = &tx_pool->tx_buff[index];
 749         tx_buff->skb = skb;
 750         tx_buff->data_dma[0] = data_dma_addr;
 751         tx_buff->data_len[0] = skb->len;
 752         tx_buff->index = index;
 753         tx_buff->pool_index = queue_num;
 754         tx_buff->last_frag = true;
 755         tx_buff->used_bounce = used_bounce;
 756
 757         memset(&tx_crq, 0, sizeof(tx_crq));
 758         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 759         tx_crq.v1.type = IBMVNIC_TX_DESC;
 760         tx_crq.v1.n_crq_elem = 1;
 761         tx_crq.v1.n_sge = 1;
 762         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 763         tx_crq.v1.correlator = cpu_to_be32(index);
 764         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 765         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 766         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 767
 768         if (adapter->vlan_header_insertion) {
 769                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 770                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 771         }
 772
 773         if (skb->protocol == htons(ETH_P_IP)) {
 774                 if (ip_hdr(skb)->version == 4)
 775                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 776                 else if (ip_hdr(skb)->version == 6)
 777                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 778
 779                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 780                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 781                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 782                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 783         }
 784
 785         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 786                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 787                 hdrs += 2;
 788         }
 789         /* determine if l2/3/4 headers are sent to firmware */
 790         if ((*hdrs >> 7) & 1 &&
 791             (skb->protocol == htons(ETH_P_IP) ||
 792              skb->protocol == htons(ETH_P_IPV6))) {
 793                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 794                 tx_crq.v1.n_crq_elem = num_entries;
 795                 tx_buff->indir_arr[0] = tx_crq;
 796                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 797                                                     sizeof(tx_buff->indir_arr),
 798                                                     DMA_TO_DEVICE);
 799                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 800                         if (!firmware_has_feature(FW_FEATURE_CMO))
 801                                 dev_err(dev, "tx: unable to map descriptor array\n");
 802                         tx_map_failed++;
 803                         tx_dropped++;
 804                         ret = NETDEV_TX_BUSY;
 805                         goto out;
 806                 }
 807                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 808                                                (u64)tx_buff->indir_dma,
 809                                                (u64)num_entries);
 810         } else {
 811                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 812                                       &tx_crq);
 813         }
 814         if (lpar_rc != H_SUCCESS) {
 815                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 816
 817                 if (tx_pool->consumer_index == 0)
 818                         tx_pool->consumer_index =
 819                                 adapter->max_tx_entries_per_subcrq - 1;
 820                 else
 821                         tx_pool->consumer_index--;
 822
 823                 tx_send_failed++;
 824                 tx_dropped++;
 825                 ret = NETDEV_TX_BUSY;
 826                 goto out;
 827         }
 828         tx_packets++;
 829         tx_bytes += skb->len;
 830         txq->trans_start = jiffies;
 831         ret = NETDEV_TX_OK;
 832
 833 out:
 834         netdev->stats.tx_dropped += tx_dropped;
 835         netdev->stats.tx_bytes += tx_bytes;
 836         netdev->stats.tx_packets += tx_packets;
 837         adapter->tx_send_failed += tx_send_failed;
 838         adapter->tx_map_failed += tx_map_failed;
 839
 840         return ret;
 841 }
 842
 843 static void ibmvnic_set_multi(struct net_device *netdev)
 844 {
 845         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 846         struct netdev_hw_addr *ha;
 847         union ibmvnic_crq crq;
 848
 849         memset(&crq, 0, sizeof(crq));
 850         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 851         crq.request_capability.cmd = REQUEST_CAPABILITY;
 852
 853         if (netdev->flags & IFF_PROMISC) {
 854                 if (!adapter->promisc_supported)
 855                         return;
 856         } else {
 857                 if (netdev->flags & IFF_ALLMULTI) {
 858                         /* Accept all multicast */
 859                         memset(&crq, 0, sizeof(crq));
 860                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 861                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 862                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 863                         ibmvnic_send_crq(adapter, &crq);
 864                 } else if (netdev_mc_empty(netdev)) {
 865                         /* Reject all multicast */
 866                         memset(&crq, 0, sizeof(crq));
 867                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 868                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 869                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 870                         ibmvnic_send_crq(adapter, &crq);
 871                 } else {
 872                         /* Accept one or more multicast(s) */
 873                         netdev_for_each_mc_addr(ha, netdev) {
 874                                 memset(&crq, 0, sizeof(crq));
 875                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 876                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 877                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 878                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 879                                                 ha->addr);
 880                                 ibmvnic_send_crq(adapter, &crq);
 881                         }
 882                 }
 883         }
 884 }
 885
 886 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 887 {
 888         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 889         struct sockaddr *addr = p;
 890         union ibmvnic_crq crq;
 891
 892         if (!is_valid_ether_addr(addr->sa_data))
 893                 return -EADDRNOTAVAIL;
 894
 895         memset(&crq, 0, sizeof(crq));
 896         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 897         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 898         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 899         ibmvnic_send_crq(adapter, &crq);
 900         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 901         return 0;
 902 }
 903
 904 static void ibmvnic_tx_timeout(struct net_device *dev)
 905 {
 906         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 907         int rc;
 908
 909         /* Adapter timed out, resetting it */
 910         release_sub_crqs(adapter);
 911         rc = ibmvnic_reset_crq(adapter);
 912         if (rc)
 913                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 914         else
 915                 ibmvnic_send_crq_init(adapter);
 916 }
 917
 918 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 919                                   struct ibmvnic_rx_buff *rx_buff)
 920 {
 921         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 922
 923         rx_buff->skb = NULL;
 924
 925         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 926         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 927
 928         atomic_dec(&pool->available);
 929 }
 930
 931 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 932 {
 933         struct net_device *netdev = napi->dev;
 934         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 935         int scrq_num = (int)(napi - adapter->napi);
 936         int frames_processed = 0;
 937 restart_poll:
 938         while (frames_processed < budget) {
 939                 struct sk_buff *skb;
 940                 struct ibmvnic_rx_buff *rx_buff;
 941                 union sub_crq *next;
 942                 u32 length;
 943                 u16 offset;
 944                 u8 flags = 0;
 945
 946                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 947                         break;
 948                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 949                 rx_buff =
 950                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 951                                                           rx_comp.correlator);
 952                 /* do error checking */
 953                 if (next->rx_comp.rc) {
 954                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 955                         /* free the entry */
 956                         next->rx_comp.first = 0;
 957                         remove_buff_from_pool(adapter, rx_buff);
 958                         break;
 959                 }
 960
 961                 length = be32_to_cpu(next->rx_comp.len);
 962                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 963                 flags = next->rx_comp.flags;
 964                 skb = rx_buff->skb;
 965                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 966                                         length);
 967                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 968                 /* free the entry */
 969                 next->rx_comp.first = 0;
 970                 remove_buff_from_pool(adapter, rx_buff);
 971
 972                 skb_put(skb, length);
 973                 skb->protocol = eth_type_trans(skb, netdev);
 974
 975                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 976                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 977                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 978                 }
 979
 980                 length = skb->len;
 981                 napi_gro_receive(napi, skb); /* send it up */
 982                 netdev->stats.rx_packets++;
 983                 netdev->stats.rx_bytes += length;
 984                 frames_processed++;
 985         }
 986         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 987
 988         if (frames_processed < budget) {
 989                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 990                 napi_complete(napi);
 991                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
 992                     napi_reschedule(napi)) {
 993                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 994                         goto restart_poll;
 995                 }
 996         }
 997         return frames_processed;
 998 }
 999
1000 #ifdef CONFIG_NET_POLL_CONTROLLER
1001 static void ibmvnic_netpoll_controller(struct net_device *dev)
1002 {
1003         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1004         int i;
1005
1006         replenish_pools(netdev_priv(dev));
1007         for (i = 0; i < adapter->req_rx_queues; i++)
1008                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1009                                      adapter->rx_scrq[i]);
1010 }
1011 #endif
1012
1013 static const struct net_device_ops ibmvnic_netdev_ops = {
1014         .ndo_open               = ibmvnic_open,
1015         .ndo_stop               = ibmvnic_close,
1016         .ndo_start_xmit         = ibmvnic_xmit,
1017         .ndo_set_rx_mode        = ibmvnic_set_multi,
1018         .ndo_set_mac_address    = ibmvnic_set_mac,
1019         .ndo_validate_addr      = eth_validate_addr,
1020         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1021 #ifdef CONFIG_NET_POLL_CONTROLLER
1022         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1023 #endif
1024 };
1025
1026 /* ethtool functions */
1027
1028 static int ibmvnic_get_settings(struct net_device *netdev,
1029                                 struct ethtool_cmd *cmd)
1030 {
1031         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1032                           SUPPORTED_FIBRE);
1033         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1034                             ADVERTISED_FIBRE);
1035         ethtool_cmd_speed_set(cmd, SPEED_1000);
1036         cmd->duplex = DUPLEX_FULL;
1037         cmd->port = PORT_FIBRE;
1038         cmd->phy_address = 0;
1039         cmd->transceiver = XCVR_INTERNAL;
1040         cmd->autoneg = AUTONEG_ENABLE;
1041         cmd->maxtxpkt = 0;
1042         cmd->maxrxpkt = 1;
1043         return 0;
1044 }
1045
1046 static void ibmvnic_get_drvinfo(struct net_device *dev,
1047                                 struct ethtool_drvinfo *info)
1048 {
1049         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1050         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1051 }
1052
1053 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1054 {
1055         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1056
1057         return adapter->msg_enable;
1058 }
1059
1060 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1061 {
1062         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1063
1064         adapter->msg_enable = data;
1065 }
1066
1067 static u32 ibmvnic_get_link(struct net_device *netdev)
1068 {
1069         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1070
1071         /* Don't need to send a query because we request a logical link up at
1072          * init and then we wait for link state indications
1073          */
1074         return adapter->logical_link_state;
1075 }
1076
1077 static void ibmvnic_get_ringparam(struct net_device *netdev,
1078                                   struct ethtool_ringparam *ring)
1079 {
1080         ring->rx_max_pending = 0;
1081         ring->tx_max_pending = 0;
1082         ring->rx_mini_max_pending = 0;
1083         ring->rx_jumbo_max_pending = 0;
1084         ring->rx_pending = 0;
1085         ring->tx_pending = 0;
1086         ring->rx_mini_pending = 0;
1087         ring->rx_jumbo_pending = 0;
1088 }
1089
1090 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1091 {
1092         int i;
1093
1094         if (stringset != ETH_SS_STATS)
1095                 return;
1096
1097         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1098                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1099 }
1100
1101 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1102 {
1103         switch (sset) {
1104         case ETH_SS_STATS:
1105                 return ARRAY_SIZE(ibmvnic_stats);
1106         default:
1107                 return -EOPNOTSUPP;
1108         }
1109 }
1110
1111 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1112                                       struct ethtool_stats *stats, u64 *data)
1113 {
1114         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1115         union ibmvnic_crq crq;
1116         int i;
1117
1118         memset(&crq, 0, sizeof(crq));
1119         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1120         crq.request_statistics.cmd = REQUEST_STATISTICS;
1121         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1122         crq.request_statistics.len =
1123             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1124         ibmvnic_send_crq(adapter, &crq);
1125
1126         /* Wait for data to be written */
1127         init_completion(&adapter->stats_done);
1128         wait_for_completion(&adapter->stats_done);
1129
1130         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1131                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1132 }
1133
1134 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1135         .get_settings           = ibmvnic_get_settings,
1136         .get_drvinfo            = ibmvnic_get_drvinfo,
1137         .get_msglevel           = ibmvnic_get_msglevel,
1138         .set_msglevel           = ibmvnic_set_msglevel,
1139         .get_link               = ibmvnic_get_link,
1140         .get_ringparam          = ibmvnic_get_ringparam,
1141         .get_strings            = ibmvnic_get_strings,
1142         .get_sset_count         = ibmvnic_get_sset_count,
1143         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1144 };
1145
1146 /* Routines for managing CRQs/sCRQs  */
1147
1148 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1149                                   struct ibmvnic_sub_crq_queue *scrq)
1150 {
1151         struct device *dev = &adapter->vdev->dev;
1152         long rc;
1153
1154         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1155
1156         /* Close the sub-crqs */
1157         do {
1158                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1159                                         adapter->vdev->unit_address,
1160                                         scrq->crq_num);
1161         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1162
1163         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1164                          DMA_BIDIRECTIONAL);
1165         free_pages((unsigned long)scrq->msgs, 2);
1166         kfree(scrq);
1167 }
1168
1169 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1170                                                         *adapter)
1171 {
1172         struct device *dev = &adapter->vdev->dev;
1173         struct ibmvnic_sub_crq_queue *scrq;
1174         int rc;
1175
1176         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1177         if (!scrq)
1178                 return NULL;
1179
1180         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1181         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1182         if (!scrq->msgs) {
1183                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1184                 goto zero_page_failed;
1185         }
1186
1187         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1188                                          DMA_BIDIRECTIONAL);
1189         if (dma_mapping_error(dev, scrq->msg_token)) {
1190                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1191                 goto map_failed;
1192         }
1193
1194         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1195                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1196
1197         if (rc == H_RESOURCE)
1198                 rc = ibmvnic_reset_crq(adapter);
1199
1200         if (rc == H_CLOSED) {
1201                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1202         } else if (rc) {
1203                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1204                 goto reg_failed;
1205         }
1206
1207         scrq->adapter = adapter;
1208         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1209         scrq->cur = 0;
1210         scrq->rx_skb_top = NULL;
1211         spin_lock_init(&scrq->lock);
1212
1213         netdev_dbg(adapter->netdev,
1214                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1215                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1216
1217         return scrq;
1218
1219 reg_failed:
1220         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1221                          DMA_BIDIRECTIONAL);
1222 map_failed:
1223         free_pages((unsigned long)scrq->msgs, 2);
1224 zero_page_failed:
1225         kfree(scrq);
1226
1227         return NULL;
1228 }
1229
1230 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1231 {
1232         int i;
1233
1234         if (adapter->tx_scrq) {
1235                 for (i = 0; i < adapter->req_tx_queues; i++)
1236                         if (adapter->tx_scrq[i]) {
1237                                 free_irq(adapter->tx_scrq[i]->irq,
1238                                          adapter->tx_scrq[i]);
1239                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1240                                 release_sub_crq_queue(adapter,
1241                                                       adapter->tx_scrq[i]);
1242                         }
1243                 adapter->tx_scrq = NULL;
1244         }
1245
1246         if (adapter->rx_scrq) {
1247                 for (i = 0; i < adapter->req_rx_queues; i++)
1248                         if (adapter->rx_scrq[i]) {
1249                                 free_irq(adapter->rx_scrq[i]->irq,
1250                                          adapter->rx_scrq[i]);
1251                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1252                                 release_sub_crq_queue(adapter,
1253                                                       adapter->rx_scrq[i]);
1254                         }
1255                 adapter->rx_scrq = NULL;
1256         }
1257
1258         adapter->requested_caps = 0;
1259 }
1260
1261 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1262 {
1263         int i;
1264
1265         if (adapter->tx_scrq) {
1266                 for (i = 0; i < adapter->req_tx_queues; i++)
1267                         if (adapter->tx_scrq[i])
1268                                 release_sub_crq_queue(adapter,
1269                                                       adapter->tx_scrq[i]);
1270                 adapter->tx_scrq = NULL;
1271         }
1272
1273         if (adapter->rx_scrq) {
1274                 for (i = 0; i < adapter->req_rx_queues; i++)
1275                         if (adapter->rx_scrq[i])
1276                                 release_sub_crq_queue(adapter,
1277                                                       adapter->rx_scrq[i]);
1278                 adapter->rx_scrq = NULL;
1279         }
1280
1281         adapter->requested_caps = 0;
1282 }
1283
1284 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1285                             struct ibmvnic_sub_crq_queue *scrq)
1286 {
1287         struct device *dev = &adapter->vdev->dev;
1288         unsigned long rc;
1289
1290         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1291                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1292         if (rc)
1293                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1294                         scrq->hw_irq, rc);
1295         return rc;
1296 }
1297
1298 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1299                            struct ibmvnic_sub_crq_queue *scrq)
1300 {
1301         struct device *dev = &adapter->vdev->dev;
1302         unsigned long rc;
1303
1304         if (scrq->hw_irq > 0x100000000ULL) {
1305                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1306                 return 1;
1307         }
1308
1309         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1310                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1311         if (rc)
1312                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1313                         scrq->hw_irq, rc);
1314         return rc;
1315 }
1316
1317 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1318                                struct ibmvnic_sub_crq_queue *scrq)
1319 {
1320         struct device *dev = &adapter->vdev->dev;
1321         struct ibmvnic_tx_buff *txbuff;
1322         union sub_crq *next;
1323         int index;
1324         int i, j;
1325         u8 first;
1326
1327 restart_loop:
1328         while (pending_scrq(adapter, scrq)) {
1329                 unsigned int pool = scrq->pool_index;
1330
1331                 next = ibmvnic_next_scrq(adapter, scrq);
1332                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1333                         if (next->tx_comp.rcs[i]) {
1334                                 dev_err(dev, "tx error %x\n",
1335                                         next->tx_comp.rcs[i]);
1336                                 continue;
1337                         }
1338                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1339                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1340
1341                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1342                                 if (!txbuff->data_dma[j])
1343                                         continue;
1344
1345                                 txbuff->data_dma[j] = 0;
1346                                 txbuff->used_bounce = false;
1347                         }
1348                         /* if sub_crq was sent indirectly */
1349                         first = txbuff->indir_arr[0].generic.first;
1350                         if (first == IBMVNIC_CRQ_CMD) {
1351                                 dma_unmap_single(dev, txbuff->indir_dma,
1352                                                  sizeof(txbuff->indir_arr),
1353                                                  DMA_TO_DEVICE);
1354                         }
1355
1356                         if (txbuff->last_frag)
1357                                 dev_kfree_skb_any(txbuff->skb);
1358
1359                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1360                                                      producer_index] = index;
1361                         adapter->tx_pool[pool].producer_index =
1362                             (adapter->tx_pool[pool].producer_index + 1) %
1363                             adapter->max_tx_entries_per_subcrq;
1364                 }
1365                 /* remove tx_comp scrq*/
1366                 next->tx_comp.first = 0;
1367         }
1368
1369         enable_scrq_irq(adapter, scrq);
1370
1371         if (pending_scrq(adapter, scrq)) {
1372                 disable_scrq_irq(adapter, scrq);
1373                 goto restart_loop;
1374         }
1375
1376         return 0;
1377 }
1378
1379 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1380 {
1381         struct ibmvnic_sub_crq_queue *scrq = instance;
1382         struct ibmvnic_adapter *adapter = scrq->adapter;
1383
1384         disable_scrq_irq(adapter, scrq);
1385         ibmvnic_complete_tx(adapter, scrq);
1386
1387         return IRQ_HANDLED;
1388 }
1389
1390 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1391 {
1392         struct ibmvnic_sub_crq_queue *scrq = instance;
1393         struct ibmvnic_adapter *adapter = scrq->adapter;
1394
1395         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1396                 disable_scrq_irq(adapter, scrq);
1397                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1398         }
1399
1400         return IRQ_HANDLED;
1401 }
1402
1403 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1404 {
1405         struct device *dev = &adapter->vdev->dev;
1406         struct ibmvnic_sub_crq_queue *scrq;
1407         int i = 0, j = 0;
1408         int rc = 0;
1409
1410         for (i = 0; i < adapter->req_tx_queues; i++) {
1411                 scrq = adapter->tx_scrq[i];
1412                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1413
1414                 if (!scrq->irq) {
1415                         rc = -EINVAL;
1416                         dev_err(dev, "Error mapping irq\n");
1417                         goto req_tx_irq_failed;
1418                 }
1419
1420                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1421                                  0, "ibmvnic_tx", scrq);
1422
1423                 if (rc) {
1424                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1425                                 scrq->irq, rc);
1426                         irq_dispose_mapping(scrq->irq);
1427                         goto req_rx_irq_failed;
1428                 }
1429         }
1430
1431         for (i = 0; i < adapter->req_rx_queues; i++) {
1432                 scrq = adapter->rx_scrq[i];
1433                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1434                 if (!scrq->irq) {
1435                         rc = -EINVAL;
1436                         dev_err(dev, "Error mapping irq\n");
1437                         goto req_rx_irq_failed;
1438                 }
1439                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1440                                  0, "ibmvnic_rx", scrq);
1441                 if (rc) {
1442                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1443                                 scrq->irq, rc);
1444                         irq_dispose_mapping(scrq->irq);
1445                         goto req_rx_irq_failed;
1446                 }
1447         }
1448         return rc;
1449
1450 req_rx_irq_failed:
1451         for (j = 0; j < i; j++) {
1452                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1453                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1454         }
1455         i = adapter->req_tx_queues;
1456 req_tx_irq_failed:
1457         for (j = 0; j < i; j++) {
1458                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1459                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1460         }
1461         release_sub_crqs_no_irqs(adapter);
1462         return rc;
1463 }
1464
1465 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1466 {
1467         struct device *dev = &adapter->vdev->dev;
1468         struct ibmvnic_sub_crq_queue **allqueues;
1469         int registered_queues = 0;
1470         union ibmvnic_crq crq;
1471         int total_queues;
1472         int more = 0;
1473         int i;
1474
1475         if (!retry) {
1476                 /* Sub-CRQ entries are 32 byte long */
1477                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1478
1479                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1480                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1481                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1482                         goto allqueues_failed;
1483                 }
1484
1485                 /* Get the minimum between the queried max and the entries
1486                  * that fit in our PAGE_SIZE
1487                  */
1488                 adapter->req_tx_entries_per_subcrq =
1489                     adapter->max_tx_entries_per_subcrq > entries_page ?
1490                     entries_page : adapter->max_tx_entries_per_subcrq;
1491                 adapter->req_rx_add_entries_per_subcrq =
1492                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1493                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1494
1495                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1496                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1497                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1498
1499                 adapter->req_mtu = adapter->max_mtu;
1500         }
1501
1502         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1503
1504         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1505         if (!allqueues)
1506                 goto allqueues_failed;
1507
1508         for (i = 0; i < total_queues; i++) {
1509                 allqueues[i] = init_sub_crq_queue(adapter);
1510                 if (!allqueues[i]) {
1511                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1512                         break;
1513                 }
1514                 registered_queues++;
1515         }
1516
1517         /* Make sure we were able to register the minimum number of queues */
1518         if (registered_queues <
1519             adapter->min_tx_queues + adapter->min_rx_queues) {
1520                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1521                 goto tx_failed;
1522         }
1523
1524         /* Distribute the failed allocated queues*/
1525         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1526                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1527                 switch (i % 3) {
1528                 case 0:
1529                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1530                                 adapter->req_rx_queues--;
1531                         else
1532                                 more++;
1533                         break;
1534                 case 1:
1535                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1536                                 adapter->req_tx_queues--;
1537                         else
1538                                 more++;
1539                         break;
1540                 }
1541         }
1542
1543         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1544                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1545         if (!adapter->tx_scrq)
1546                 goto tx_failed;
1547
1548         for (i = 0; i < adapter->req_tx_queues; i++) {
1549                 adapter->tx_scrq[i] = allqueues[i];
1550                 adapter->tx_scrq[i]->pool_index = i;
1551         }
1552
1553         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1554                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1555         if (!adapter->rx_scrq)
1556                 goto rx_failed;
1557
1558         for (i = 0; i < adapter->req_rx_queues; i++) {
1559                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1560                 adapter->rx_scrq[i]->scrq_num = i;
1561         }
1562
1563         memset(&crq, 0, sizeof(crq));
1564         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1565         crq.request_capability.cmd = REQUEST_CAPABILITY;
1566
1567         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1568         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1569         ibmvnic_send_crq(adapter, &crq);
1570
1571         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1572         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1573         ibmvnic_send_crq(adapter, &crq);
1574
1575         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1576         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1577         ibmvnic_send_crq(adapter, &crq);
1578
1579         crq.request_capability.capability =
1580             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1581         crq.request_capability.number =
1582             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1583         ibmvnic_send_crq(adapter, &crq);
1584
1585         crq.request_capability.capability =
1586             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1587         crq.request_capability.number =
1588             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1589         ibmvnic_send_crq(adapter, &crq);
1590
1591         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1592         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1593         ibmvnic_send_crq(adapter, &crq);
1594
1595         if (adapter->netdev->flags & IFF_PROMISC) {
1596                 if (adapter->promisc_supported) {
1597                         crq.request_capability.capability =
1598                             cpu_to_be16(PROMISC_REQUESTED);
1599                         crq.request_capability.number = cpu_to_be64(1);
1600                         ibmvnic_send_crq(adapter, &crq);
1601                 }
1602         } else {
1603                 crq.request_capability.capability =
1604                     cpu_to_be16(PROMISC_REQUESTED);
1605                 crq.request_capability.number = cpu_to_be64(0);
1606                 ibmvnic_send_crq(adapter, &crq);
1607         }
1608
1609         kfree(allqueues);
1610
1611         return;
1612
1613 rx_failed:
1614         kfree(adapter->tx_scrq);
1615         adapter->tx_scrq = NULL;
1616 tx_failed:
1617         for (i = 0; i < registered_queues; i++)
1618                 release_sub_crq_queue(adapter, allqueues[i]);
1619         kfree(allqueues);
1620 allqueues_failed:
1621         ibmvnic_remove(adapter->vdev);
1622 }
1623
1624 static int pending_scrq(struct ibmvnic_adapter *adapter,
1625                         struct ibmvnic_sub_crq_queue *scrq)
1626 {
1627         union sub_crq *entry = &scrq->msgs[scrq->cur];
1628
1629         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1630                 return 1;
1631         else
1632                 return 0;
1633 }
1634
1635 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1636                                         struct ibmvnic_sub_crq_queue *scrq)
1637 {
1638         union sub_crq *entry;
1639         unsigned long flags;
1640
1641         spin_lock_irqsave(&scrq->lock, flags);
1642         entry = &scrq->msgs[scrq->cur];
1643         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1644                 if (++scrq->cur == scrq->size)
1645                         scrq->cur = 0;
1646         } else {
1647                 entry = NULL;
1648         }
1649         spin_unlock_irqrestore(&scrq->lock, flags);
1650
1651         return entry;
1652 }
1653
1654 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1655 {
1656         struct ibmvnic_crq_queue *queue = &adapter->crq;
1657         union ibmvnic_crq *crq;
1658
1659         crq = &queue->msgs[queue->cur];
1660         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1661                 if (++queue->cur == queue->size)
1662                         queue->cur = 0;
1663         } else {
1664                 crq = NULL;
1665         }
1666
1667         return crq;
1668 }
1669
1670 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1671                        union sub_crq *sub_crq)
1672 {
1673         unsigned int ua = adapter->vdev->unit_address;
1674         struct device *dev = &adapter->vdev->dev;
1675         u64 *u64_crq = (u64 *)sub_crq;
1676         int rc;
1677
1678         netdev_dbg(adapter->netdev,
1679                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1680                    (unsigned long int)cpu_to_be64(remote_handle),
1681                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1682                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1683                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1684                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1685
1686         /* Make sure the hypervisor sees the complete request */
1687         mb();
1688
1689         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1690                                 cpu_to_be64(remote_handle),
1691                                 cpu_to_be64(u64_crq[0]),
1692                                 cpu_to_be64(u64_crq[1]),
1693                                 cpu_to_be64(u64_crq[2]),
1694                                 cpu_to_be64(u64_crq[3]));
1695
1696         if (rc) {
1697                 if (rc == H_CLOSED)
1698                         dev_warn(dev, "CRQ Queue closed\n");
1699                 dev_err(dev, "Send error (rc=%d)\n", rc);
1700         }
1701
1702         return rc;
1703 }
1704
1705 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1706                                 u64 remote_handle, u64 ioba, u64 num_entries)
1707 {
1708         unsigned int ua = adapter->vdev->unit_address;
1709         struct device *dev = &adapter->vdev->dev;
1710         int rc;
1711
1712         /* Make sure the hypervisor sees the complete request */
1713         mb();
1714         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1715                                 cpu_to_be64(remote_handle),
1716                                 ioba, num_entries);
1717
1718         if (rc) {
1719                 if (rc == H_CLOSED)
1720                         dev_warn(dev, "CRQ Queue closed\n");
1721                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1722         }
1723
1724         return rc;
1725 }
1726
1727 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1728                             union ibmvnic_crq *crq)
1729 {
1730         unsigned int ua = adapter->vdev->unit_address;
1731         struct device *dev = &adapter->vdev->dev;
1732         u64 *u64_crq = (u64 *)crq;
1733         int rc;
1734
1735         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1736                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1737                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1738
1739         /* Make sure the hypervisor sees the complete request */
1740         mb();
1741
1742         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1743                                 cpu_to_be64(u64_crq[0]),
1744                                 cpu_to_be64(u64_crq[1]));
1745
1746         if (rc) {
1747                 if (rc == H_CLOSED)
1748                         dev_warn(dev, "CRQ Queue closed\n");
1749                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1750         }
1751
1752         return rc;
1753 }
1754
1755 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1756 {
1757         union ibmvnic_crq crq;
1758
1759         memset(&crq, 0, sizeof(crq));
1760         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1761         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1762         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1763
1764         return ibmvnic_send_crq(adapter, &crq);
1765 }
1766
1767 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1768 {
1769         union ibmvnic_crq crq;
1770
1771         memset(&crq, 0, sizeof(crq));
1772         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1773         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1774         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1775
1776         return ibmvnic_send_crq(adapter, &crq);
1777 }
1778
1779 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1780 {
1781         union ibmvnic_crq crq;
1782
1783         memset(&crq, 0, sizeof(crq));
1784         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1785         crq.version_exchange.cmd = VERSION_EXCHANGE;
1786         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1787
1788         return ibmvnic_send_crq(adapter, &crq);
1789 }
1790
1791 static void send_login(struct ibmvnic_adapter *adapter)
1792 {
1793         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1794         struct ibmvnic_login_buffer *login_buffer;
1795         struct ibmvnic_inflight_cmd *inflight_cmd;
1796         struct device *dev = &adapter->vdev->dev;
1797         dma_addr_t rsp_buffer_token;
1798         dma_addr_t buffer_token;
1799         size_t rsp_buffer_size;
1800         union ibmvnic_crq crq;
1801         unsigned long flags;
1802         size_t buffer_size;
1803         __be64 *tx_list_p;
1804         __be64 *rx_list_p;
1805         int i;
1806
1807         buffer_size =
1808             sizeof(struct ibmvnic_login_buffer) +
1809             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1810
1811         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1812         if (!login_buffer)
1813                 goto buf_alloc_failed;
1814
1815         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1816                                       DMA_TO_DEVICE);
1817         if (dma_mapping_error(dev, buffer_token)) {
1818                 dev_err(dev, "Couldn't map login buffer\n");
1819                 goto buf_map_failed;
1820         }
1821
1822         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1823                           sizeof(u64) * adapter->req_tx_queues +
1824                           sizeof(u64) * adapter->req_rx_queues +
1825                           sizeof(u64) * adapter->req_rx_queues +
1826                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1827
1828         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1829         if (!login_rsp_buffer)
1830                 goto buf_rsp_alloc_failed;
1831
1832         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1833                                           rsp_buffer_size, DMA_FROM_DEVICE);
1834         if (dma_mapping_error(dev, rsp_buffer_token)) {
1835                 dev_err(dev, "Couldn't map login rsp buffer\n");
1836                 goto buf_rsp_map_failed;
1837         }
1838         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1839         if (!inflight_cmd) {
1840                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1841                 goto inflight_alloc_failed;
1842         }
1843         adapter->login_buf = login_buffer;
1844         adapter->login_buf_token = buffer_token;
1845         adapter->login_buf_sz = buffer_size;
1846         adapter->login_rsp_buf = login_rsp_buffer;
1847         adapter->login_rsp_buf_token = rsp_buffer_token;
1848         adapter->login_rsp_buf_sz = rsp_buffer_size;
1849
1850         login_buffer->len = cpu_to_be32(buffer_size);
1851         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1852         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1853         login_buffer->off_txcomp_subcrqs =
1854             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1855         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1856         login_buffer->off_rxcomp_subcrqs =
1857             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1858                         sizeof(u64) * adapter->req_tx_queues);
1859         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1860         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1861
1862         tx_list_p = (__be64 *)((char *)login_buffer +
1863                                       sizeof(struct ibmvnic_login_buffer));
1864         rx_list_p = (__be64 *)((char *)login_buffer +
1865                                       sizeof(struct ibmvnic_login_buffer) +
1866                                       sizeof(u64) * adapter->req_tx_queues);
1867
1868         for (i = 0; i < adapter->req_tx_queues; i++) {
1869                 if (adapter->tx_scrq[i]) {
1870                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1871                                                    crq_num);
1872                 }
1873         }
1874
1875         for (i = 0; i < adapter->req_rx_queues; i++) {
1876                 if (adapter->rx_scrq[i]) {
1877                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1878                                                    crq_num);
1879                 }
1880         }
1881
1882         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1883         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1884                 netdev_dbg(adapter->netdev, "%016lx\n",
1885                            ((unsigned long int *)(adapter->login_buf))[i]);
1886         }
1887
1888         memset(&crq, 0, sizeof(crq));
1889         crq.login.first = IBMVNIC_CRQ_CMD;
1890         crq.login.cmd = LOGIN;
1891         crq.login.ioba = cpu_to_be32(buffer_token);
1892         crq.login.len = cpu_to_be32(buffer_size);
1893
1894         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1895
1896         spin_lock_irqsave(&adapter->inflight_lock, flags);
1897         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1898         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1899
1900         ibmvnic_send_crq(adapter, &crq);
1901
1902         return;
1903
1904 inflight_alloc_failed:
1905         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1906                          DMA_FROM_DEVICE);
1907 buf_rsp_map_failed:
1908         kfree(login_rsp_buffer);
1909 buf_rsp_alloc_failed:
1910         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1911 buf_map_failed:
1912         kfree(login_buffer);
1913 buf_alloc_failed:
1914         return;
1915 }
1916
1917 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1918                              u32 len, u8 map_id)
1919 {
1920         union ibmvnic_crq crq;
1921
1922         memset(&crq, 0, sizeof(crq));
1923         crq.request_map.first = IBMVNIC_CRQ_CMD;
1924         crq.request_map.cmd = REQUEST_MAP;
1925         crq.request_map.map_id = map_id;
1926         crq.request_map.ioba = cpu_to_be32(addr);
1927         crq.request_map.len = cpu_to_be32(len);
1928         ibmvnic_send_crq(adapter, &crq);
1929 }
1930
1931 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1932 {
1933         union ibmvnic_crq crq;
1934
1935         memset(&crq, 0, sizeof(crq));
1936         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1937         crq.request_unmap.cmd = REQUEST_UNMAP;
1938         crq.request_unmap.map_id = map_id;
1939         ibmvnic_send_crq(adapter, &crq);
1940 }
1941
1942 static void send_map_query(struct ibmvnic_adapter *adapter)
1943 {
1944         union ibmvnic_crq crq;
1945
1946         memset(&crq, 0, sizeof(crq));
1947         crq.query_map.first = IBMVNIC_CRQ_CMD;
1948         crq.query_map.cmd = QUERY_MAP;
1949         ibmvnic_send_crq(adapter, &crq);
1950 }
1951
1952 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1953 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1954 {
1955         union ibmvnic_crq crq;
1956
1957         atomic_set(&adapter->running_cap_queries, 0);
1958         memset(&crq, 0, sizeof(crq));
1959         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1960         crq.query_capability.cmd = QUERY_CAPABILITY;
1961
1962         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1963         atomic_inc(&adapter->running_cap_queries);
1964         ibmvnic_send_crq(adapter, &crq);
1965
1966         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1967         atomic_inc(&adapter->running_cap_queries);
1968         ibmvnic_send_crq(adapter, &crq);
1969
1970         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1971         atomic_inc(&adapter->running_cap_queries);
1972         ibmvnic_send_crq(adapter, &crq);
1973
1974         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1975         atomic_inc(&adapter->running_cap_queries);
1976         ibmvnic_send_crq(adapter, &crq);
1977
1978         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1979         atomic_inc(&adapter->running_cap_queries);
1980         ibmvnic_send_crq(adapter, &crq);
1981
1982         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1983         atomic_inc(&adapter->running_cap_queries);
1984         ibmvnic_send_crq(adapter, &crq);
1985
1986         crq.query_capability.capability =
1987             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1988         atomic_inc(&adapter->running_cap_queries);
1989         ibmvnic_send_crq(adapter, &crq);
1990
1991         crq.query_capability.capability =
1992             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1993         atomic_inc(&adapter->running_cap_queries);
1994         ibmvnic_send_crq(adapter, &crq);
1995
1996         crq.query_capability.capability =
1997             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
1998         atomic_inc(&adapter->running_cap_queries);
1999         ibmvnic_send_crq(adapter, &crq);
2000
2001         crq.query_capability.capability =
2002             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2003         atomic_inc(&adapter->running_cap_queries);
2004         ibmvnic_send_crq(adapter, &crq);
2005
2006         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2007         atomic_inc(&adapter->running_cap_queries);
2008         ibmvnic_send_crq(adapter, &crq);
2009
2010         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2011         atomic_inc(&adapter->running_cap_queries);
2012         ibmvnic_send_crq(adapter, &crq);
2013
2014         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2015         atomic_inc(&adapter->running_cap_queries);
2016         ibmvnic_send_crq(adapter, &crq);
2017
2018         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2019         atomic_inc(&adapter->running_cap_queries);
2020         ibmvnic_send_crq(adapter, &crq);
2021
2022         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2023         atomic_inc(&adapter->running_cap_queries);
2024         ibmvnic_send_crq(adapter, &crq);
2025
2026         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2027         atomic_inc(&adapter->running_cap_queries);
2028         ibmvnic_send_crq(adapter, &crq);
2029
2030         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2031         atomic_inc(&adapter->running_cap_queries);
2032         ibmvnic_send_crq(adapter, &crq);
2033
2034         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2035         atomic_inc(&adapter->running_cap_queries);
2036         ibmvnic_send_crq(adapter, &crq);
2037
2038         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2039         atomic_inc(&adapter->running_cap_queries);
2040         ibmvnic_send_crq(adapter, &crq);
2041
2042         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2043         atomic_inc(&adapter->running_cap_queries);
2044         ibmvnic_send_crq(adapter, &crq);
2045
2046         crq.query_capability.capability =
2047                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2048         atomic_inc(&adapter->running_cap_queries);
2049         ibmvnic_send_crq(adapter, &crq);
2050
2051         crq.query_capability.capability =
2052                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2053         atomic_inc(&adapter->running_cap_queries);
2054         ibmvnic_send_crq(adapter, &crq);
2055
2056         crq.query_capability.capability =
2057                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2058         atomic_inc(&adapter->running_cap_queries);
2059         ibmvnic_send_crq(adapter, &crq);
2060
2061         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2062         atomic_inc(&adapter->running_cap_queries);
2063         ibmvnic_send_crq(adapter, &crq);
2064 }
2065
2066 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2067 {
2068         struct device *dev = &adapter->vdev->dev;
2069         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2070         union ibmvnic_crq crq;
2071         int i;
2072
2073         dma_unmap_single(dev, adapter->ip_offload_tok,
2074                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2075
2076         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2077         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2078                 netdev_dbg(adapter->netdev, "%016lx\n",
2079                            ((unsigned long int *)(buf))[i]);
2080
2081         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2082         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2083         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2084                    buf->tcp_ipv4_chksum);
2085         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2086                    buf->tcp_ipv6_chksum);
2087         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2088                    buf->udp_ipv4_chksum);
2089         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2090                    buf->udp_ipv6_chksum);
2091         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2092                    buf->large_tx_ipv4);
2093         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2094                    buf->large_tx_ipv6);
2095         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2096                    buf->large_rx_ipv4);
2097         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2098                    buf->large_rx_ipv6);
2099         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2100                    buf->max_ipv4_header_size);
2101         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2102                    buf->max_ipv6_header_size);
2103         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2104                    buf->max_tcp_header_size);
2105         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2106                    buf->max_udp_header_size);
2107         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2108                    buf->max_large_tx_size);
2109         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2110                    buf->max_large_rx_size);
2111         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2112                    buf->ipv6_extension_header);
2113         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2114                    buf->tcp_pseudosum_req);
2115         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2116                    buf->num_ipv6_ext_headers);
2117         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2118                    buf->off_ipv6_ext_headers);
2119
2120         adapter->ip_offload_ctrl_tok =
2121             dma_map_single(dev, &adapter->ip_offload_ctrl,
2122                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2123
2124         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2125                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2126                 return;
2127         }
2128
2129         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2130         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2131         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2132         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2133         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2134
2135         /* large_tx/rx disabled for now, additional features needed */
2136         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2137         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2138         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2139         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2140
2141         adapter->netdev->features = NETIF_F_GSO;
2142
2143         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2144                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2145
2146         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2147                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2148
2149         if ((adapter->netdev->features &
2150             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2151                 adapter->netdev->features |= NETIF_F_RXCSUM;
2152
2153         memset(&crq, 0, sizeof(crq));
2154         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2155         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2156         crq.control_ip_offload.len =
2157             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2158         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2159         ibmvnic_send_crq(adapter, &crq);
2160 }
2161
2162 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2163                                   struct ibmvnic_adapter *adapter)
2164 {
2165         struct device *dev = &adapter->vdev->dev;
2166         struct ibmvnic_error_buff *error_buff, *tmp;
2167         unsigned long flags;
2168         bool found = false;
2169         int i;
2170
2171         if (!crq->request_error_rsp.rc.code) {
2172                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2173                          crq->request_error_rsp.rc.code);
2174                 return;
2175         }
2176
2177         spin_lock_irqsave(&adapter->error_list_lock, flags);
2178         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2179                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2180                         found = true;
2181                         list_del(&error_buff->list);
2182                         break;
2183                 }
2184         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2185
2186         if (!found) {
2187                 dev_err(dev, "Couldn't find error id %x\n",
2188                         crq->request_error_rsp.error_id);
2189                 return;
2190         }
2191
2192         dev_err(dev, "Detailed info for error id %x:",
2193                 crq->request_error_rsp.error_id);
2194
2195         for (i = 0; i < error_buff->len; i++) {
2196                 pr_cont("%02x", (int)error_buff->buff[i]);
2197                 if (i % 8 == 7)
2198                         pr_cont(" ");
2199         }
2200         pr_cont("\n");
2201
2202         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2203                          DMA_FROM_DEVICE);
2204         kfree(error_buff->buff);
2205         kfree(error_buff);
2206 }
2207
2208 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2209                                  struct ibmvnic_adapter *adapter)
2210 {
2211         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2212         struct ibmvnic_inflight_cmd *inflight_cmd;
2213         struct device *dev = &adapter->vdev->dev;
2214         union ibmvnic_crq newcrq;
2215         unsigned long flags;
2216
2217         /* allocate and map buffer */
2218         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2219         if (!adapter->dump_data) {
2220                 complete(&adapter->fw_done);
2221                 return;
2222         }
2223
2224         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2225                                                   DMA_FROM_DEVICE);
2226
2227         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2228                 if (!firmware_has_feature(FW_FEATURE_CMO))
2229                         dev_err(dev, "Couldn't map dump data\n");
2230                 kfree(adapter->dump_data);
2231                 complete(&adapter->fw_done);
2232                 return;
2233         }
2234
2235         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2236         if (!inflight_cmd) {
2237                 dma_unmap_single(dev, adapter->dump_data_token, len,
2238                                  DMA_FROM_DEVICE);
2239                 kfree(adapter->dump_data);
2240                 complete(&adapter->fw_done);
2241                 return;
2242         }
2243
2244         memset(&newcrq, 0, sizeof(newcrq));
2245         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2246         newcrq.request_dump.cmd = REQUEST_DUMP;
2247         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2248         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2249
2250         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2251
2252         spin_lock_irqsave(&adapter->inflight_lock, flags);
2253         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2254         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2255
2256         ibmvnic_send_crq(adapter, &newcrq);
2257 }
2258
2259 static void handle_error_indication(union ibmvnic_crq *crq,
2260                                     struct ibmvnic_adapter *adapter)
2261 {
2262         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2263         struct ibmvnic_inflight_cmd *inflight_cmd;
2264         struct device *dev = &adapter->vdev->dev;
2265         struct ibmvnic_error_buff *error_buff;
2266         union ibmvnic_crq new_crq;
2267         unsigned long flags;
2268
2269         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2270                 crq->error_indication.
2271                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2272                 crq->error_indication.error_id,
2273                 crq->error_indication.error_cause);
2274
2275         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2276         if (!error_buff)
2277                 return;
2278
2279         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2280         if (!error_buff->buff) {
2281                 kfree(error_buff);
2282                 return;
2283         }
2284
2285         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2286                                          DMA_FROM_DEVICE);
2287         if (dma_mapping_error(dev, error_buff->dma)) {
2288                 if (!firmware_has_feature(FW_FEATURE_CMO))
2289                         dev_err(dev, "Couldn't map error buffer\n");
2290                 kfree(error_buff->buff);
2291                 kfree(error_buff);
2292                 return;
2293         }
2294
2295         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2296         if (!inflight_cmd) {
2297                 dma_unmap_single(dev, error_buff->dma, detail_len,
2298                                  DMA_FROM_DEVICE);
2299                 kfree(error_buff->buff);
2300                 kfree(error_buff);
2301                 return;
2302         }
2303
2304         error_buff->len = detail_len;
2305         error_buff->error_id = crq->error_indication.error_id;
2306
2307         spin_lock_irqsave(&adapter->error_list_lock, flags);
2308         list_add_tail(&error_buff->list, &adapter->errors);
2309         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2310
2311         memset(&new_crq, 0, sizeof(new_crq));
2312         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2313         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2314         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2315         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2316         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2317
2318         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2319
2320         spin_lock_irqsave(&adapter->inflight_lock, flags);
2321         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2322         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2323
2324         ibmvnic_send_crq(adapter, &new_crq);
2325 }
2326
2327 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2328                                   struct ibmvnic_adapter *adapter)
2329 {
2330         struct net_device *netdev = adapter->netdev;
2331         struct device *dev = &adapter->vdev->dev;
2332         long rc;
2333
2334         rc = crq->change_mac_addr_rsp.rc.code;
2335         if (rc) {
2336                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2337                 return;
2338         }
2339         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2340                ETH_ALEN);
2341 }
2342
2343 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2344                                    struct ibmvnic_adapter *adapter)
2345 {
2346         struct device *dev = &adapter->vdev->dev;
2347         u64 *req_value;
2348         char *name;
2349
2350         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2351         case REQ_TX_QUEUES:
2352                 req_value = &adapter->req_tx_queues;
2353                 name = "tx";
2354                 break;
2355         case REQ_RX_QUEUES:
2356                 req_value = &adapter->req_rx_queues;
2357                 name = "rx";
2358                 break;
2359         case REQ_RX_ADD_QUEUES:
2360                 req_value = &adapter->req_rx_add_queues;
2361                 name = "rx_add";
2362                 break;
2363         case REQ_TX_ENTRIES_PER_SUBCRQ:
2364                 req_value = &adapter->req_tx_entries_per_subcrq;
2365                 name = "tx_entries_per_subcrq";
2366                 break;
2367         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2368                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2369                 name = "rx_add_entries_per_subcrq";
2370                 break;
2371         case REQ_MTU:
2372                 req_value = &adapter->req_mtu;
2373                 name = "mtu";
2374                 break;
2375         case PROMISC_REQUESTED:
2376                 req_value = &adapter->promisc;
2377                 name = "promisc";
2378                 break;
2379         default:
2380                 dev_err(dev, "Got invalid cap request rsp %d\n",
2381                         crq->request_capability.capability);
2382                 return;
2383         }
2384
2385         switch (crq->request_capability_rsp.rc.code) {
2386         case SUCCESS:
2387                 break;
2388         case PARTIALSUCCESS:
2389                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2390                          *req_value,
2391                          (long int)be32_to_cpu(crq->request_capability_rsp.
2392                                                number), name);
2393                 release_sub_crqs_no_irqs(adapter);
2394                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2395                 init_sub_crqs(adapter, 1);
2396                 return;
2397         default:
2398                 dev_err(dev, "Error %d in request cap rsp\n",
2399                         crq->request_capability_rsp.rc.code);
2400                 return;
2401         }
2402
2403         /* Done receiving requested capabilities, query IP offload support */
2404         if (++adapter->requested_caps == 7) {
2405                 union ibmvnic_crq newcrq;
2406                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2407                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2408                     &adapter->ip_offload_buf;
2409
2410                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2411                                                          buf_sz,
2412                                                          DMA_FROM_DEVICE);
2413
2414                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2415                         if (!firmware_has_feature(FW_FEATURE_CMO))
2416                                 dev_err(dev, "Couldn't map offload buffer\n");
2417                         return;
2418                 }
2419
2420                 memset(&newcrq, 0, sizeof(newcrq));
2421                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2422                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2423                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2424                 newcrq.query_ip_offload.ioba =
2425                     cpu_to_be32(adapter->ip_offload_tok);
2426
2427                 ibmvnic_send_crq(adapter, &newcrq);
2428         }
2429 }
2430
2431 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2432                             struct ibmvnic_adapter *adapter)
2433 {
2434         struct device *dev = &adapter->vdev->dev;
2435         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2436         struct ibmvnic_login_buffer *login = adapter->login_buf;
2437         union ibmvnic_crq crq;
2438         int i;
2439
2440         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2441                          DMA_BIDIRECTIONAL);
2442         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2443                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2444
2445         /* If the number of queues requested can't be allocated by the
2446          * server, the login response will return with code 1. We will need
2447          * to resend the login buffer with fewer queues requested.
2448          */
2449         if (login_rsp_crq->generic.rc.code) {
2450                 adapter->renegotiate = true;
2451                 complete(&adapter->init_done);
2452                 return 0;
2453         }
2454
2455         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2456         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2457                 netdev_dbg(adapter->netdev, "%016lx\n",
2458                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2459         }
2460
2461         /* Sanity checks */
2462         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2463             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2464              adapter->req_rx_add_queues !=
2465              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2466                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2467                 ibmvnic_remove(adapter->vdev);
2468                 return -EIO;
2469         }
2470         complete(&adapter->init_done);
2471
2472         memset(&crq, 0, sizeof(crq));
2473         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2474         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2475         ibmvnic_send_crq(adapter, &crq);
2476
2477         return 0;
2478 }
2479
2480 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2481                                    struct ibmvnic_adapter *adapter)
2482 {
2483         struct device *dev = &adapter->vdev->dev;
2484         u8 map_id = crq->request_map_rsp.map_id;
2485         int tx_subcrqs;
2486         int rx_subcrqs;
2487         long rc;
2488         int i;
2489
2490         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2491         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2492
2493         rc = crq->request_map_rsp.rc.code;
2494         if (rc) {
2495                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2496                 adapter->map_id--;
2497                 /* need to find and zero tx/rx_pool map_id */
2498                 for (i = 0; i < tx_subcrqs; i++) {
2499                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2500                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2501                 }
2502                 for (i = 0; i < rx_subcrqs; i++) {
2503                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2504                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2505                 }
2506         }
2507         complete(&adapter->fw_done);
2508 }
2509
2510 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2511                                      struct ibmvnic_adapter *adapter)
2512 {
2513         struct device *dev = &adapter->vdev->dev;
2514         long rc;
2515
2516         rc = crq->request_unmap_rsp.rc.code;
2517         if (rc)
2518                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2519 }
2520
2521 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2522                                  struct ibmvnic_adapter *adapter)
2523 {
2524         struct net_device *netdev = adapter->netdev;
2525         struct device *dev = &adapter->vdev->dev;
2526         long rc;
2527
2528         rc = crq->query_map_rsp.rc.code;
2529         if (rc) {
2530                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2531                 return;
2532         }
2533         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2534                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2535                    crq->query_map_rsp.free_pages);
2536 }
2537
2538 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2539                                  struct ibmvnic_adapter *adapter)
2540 {
2541         struct net_device *netdev = adapter->netdev;
2542         struct device *dev = &adapter->vdev->dev;
2543         long rc;
2544
2545         atomic_dec(&adapter->running_cap_queries);
2546         netdev_dbg(netdev, "Outstanding queries: %d\n",
2547                    atomic_read(&adapter->running_cap_queries));
2548         rc = crq->query_capability.rc.code;
2549         if (rc) {
2550                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2551                 goto out;
2552         }
2553
2554         switch (be16_to_cpu(crq->query_capability.capability)) {
2555         case MIN_TX_QUEUES:
2556                 adapter->min_tx_queues =
2557                     be64_to_cpu(crq->query_capability.number);
2558                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2559                            adapter->min_tx_queues);
2560                 break;
2561         case MIN_RX_QUEUES:
2562                 adapter->min_rx_queues =
2563                     be64_to_cpu(crq->query_capability.number);
2564                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2565                            adapter->min_rx_queues);
2566                 break;
2567         case MIN_RX_ADD_QUEUES:
2568                 adapter->min_rx_add_queues =
2569                     be64_to_cpu(crq->query_capability.number);
2570                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2571                            adapter->min_rx_add_queues);
2572                 break;
2573         case MAX_TX_QUEUES:
2574                 adapter->max_tx_queues =
2575                     be64_to_cpu(crq->query_capability.number);
2576                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2577                            adapter->max_tx_queues);
2578                 break;
2579         case MAX_RX_QUEUES:
2580                 adapter->max_rx_queues =
2581                     be64_to_cpu(crq->query_capability.number);
2582                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2583                            adapter->max_rx_queues);
2584                 break;
2585         case MAX_RX_ADD_QUEUES:
2586                 adapter->max_rx_add_queues =
2587                     be64_to_cpu(crq->query_capability.number);
2588                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2589                            adapter->max_rx_add_queues);
2590                 break;
2591         case MIN_TX_ENTRIES_PER_SUBCRQ:
2592                 adapter->min_tx_entries_per_subcrq =
2593                     be64_to_cpu(crq->query_capability.number);
2594                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2595                            adapter->min_tx_entries_per_subcrq);
2596                 break;
2597         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2598                 adapter->min_rx_add_entries_per_subcrq =
2599                     be64_to_cpu(crq->query_capability.number);
2600                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2601                            adapter->min_rx_add_entries_per_subcrq);
2602                 break;
2603         case MAX_TX_ENTRIES_PER_SUBCRQ:
2604                 adapter->max_tx_entries_per_subcrq =
2605                     be64_to_cpu(crq->query_capability.number);
2606                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2607                            adapter->max_tx_entries_per_subcrq);
2608                 break;
2609         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2610                 adapter->max_rx_add_entries_per_subcrq =
2611                     be64_to_cpu(crq->query_capability.number);
2612                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2613                            adapter->max_rx_add_entries_per_subcrq);
2614                 break;
2615         case TCP_IP_OFFLOAD:
2616                 adapter->tcp_ip_offload =
2617                     be64_to_cpu(crq->query_capability.number);
2618                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2619                            adapter->tcp_ip_offload);
2620                 break;
2621         case PROMISC_SUPPORTED:
2622                 adapter->promisc_supported =
2623                     be64_to_cpu(crq->query_capability.number);
2624                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2625                            adapter->promisc_supported);
2626                 break;
2627         case MIN_MTU:
2628                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2629                 netdev->min_mtu = adapter->min_mtu;
2630                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2631                 break;
2632         case MAX_MTU:
2633                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2634                 netdev->max_mtu = adapter->max_mtu;
2635                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2636                 break;
2637         case MAX_MULTICAST_FILTERS:
2638                 adapter->max_multicast_filters =
2639                     be64_to_cpu(crq->query_capability.number);
2640                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2641                            adapter->max_multicast_filters);
2642                 break;
2643         case VLAN_HEADER_INSERTION:
2644                 adapter->vlan_header_insertion =
2645                     be64_to_cpu(crq->query_capability.number);
2646                 if (adapter->vlan_header_insertion)
2647                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2648                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2649                            adapter->vlan_header_insertion);
2650                 break;
2651         case MAX_TX_SG_ENTRIES:
2652                 adapter->max_tx_sg_entries =
2653                     be64_to_cpu(crq->query_capability.number);
2654                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2655                            adapter->max_tx_sg_entries);
2656                 break;
2657         case RX_SG_SUPPORTED:
2658                 adapter->rx_sg_supported =
2659                     be64_to_cpu(crq->query_capability.number);
2660                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2661                            adapter->rx_sg_supported);
2662                 break;
2663         case OPT_TX_COMP_SUB_QUEUES:
2664                 adapter->opt_tx_comp_sub_queues =
2665                     be64_to_cpu(crq->query_capability.number);
2666                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2667                            adapter->opt_tx_comp_sub_queues);
2668                 break;
2669         case OPT_RX_COMP_QUEUES:
2670                 adapter->opt_rx_comp_queues =
2671                     be64_to_cpu(crq->query_capability.number);
2672                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2673                            adapter->opt_rx_comp_queues);
2674                 break;
2675         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2676                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2677                     be64_to_cpu(crq->query_capability.number);
2678                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2679                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2680                 break;
2681         case OPT_TX_ENTRIES_PER_SUBCRQ:
2682                 adapter->opt_tx_entries_per_subcrq =
2683                     be64_to_cpu(crq->query_capability.number);
2684                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2685                            adapter->opt_tx_entries_per_subcrq);
2686                 break;
2687         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2688                 adapter->opt_rxba_entries_per_subcrq =
2689                     be64_to_cpu(crq->query_capability.number);
2690                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2691                            adapter->opt_rxba_entries_per_subcrq);
2692                 break;
2693         case TX_RX_DESC_REQ:
2694                 adapter->tx_rx_desc_req = crq->query_capability.number;
2695                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2696                            adapter->tx_rx_desc_req);
2697                 break;
2698
2699         default:
2700                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2701                            crq->query_capability.capability);
2702         }
2703
2704 out:
2705         if (atomic_read(&adapter->running_cap_queries) == 0)
2706                 init_sub_crqs(adapter, 0);
2707                 /* We're done querying the capabilities, initialize sub-crqs */
2708 }
2709
2710 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2711                                    struct ibmvnic_adapter *adapter)
2712 {
2713         u8 correlator = crq->control_ras_rsp.correlator;
2714         struct device *dev = &adapter->vdev->dev;
2715         bool found = false;
2716         int i;
2717
2718         if (crq->control_ras_rsp.rc.code) {
2719                 dev_warn(dev, "Control ras failed rc=%d\n",
2720                          crq->control_ras_rsp.rc.code);
2721                 return;
2722         }
2723
2724         for (i = 0; i < adapter->ras_comp_num; i++) {
2725                 if (adapter->ras_comps[i].correlator == correlator) {
2726                         found = true;
2727                         break;
2728                 }
2729         }
2730
2731         if (!found) {
2732                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2733                 return;
2734         }
2735
2736         switch (crq->control_ras_rsp.op) {
2737         case IBMVNIC_TRACE_LEVEL:
2738                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2739                 break;
2740         case IBMVNIC_ERROR_LEVEL:
2741                 adapter->ras_comps[i].error_check_level =
2742                     crq->control_ras.level;
2743                 break;
2744         case IBMVNIC_TRACE_PAUSE:
2745                 adapter->ras_comp_int[i].paused = 1;
2746                 break;
2747         case IBMVNIC_TRACE_RESUME:
2748                 adapter->ras_comp_int[i].paused = 0;
2749                 break;
2750         case IBMVNIC_TRACE_ON:
2751                 adapter->ras_comps[i].trace_on = 1;
2752                 break;
2753         case IBMVNIC_TRACE_OFF:
2754                 adapter->ras_comps[i].trace_on = 0;
2755                 break;
2756         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2757                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2758                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2759                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2760                     crq->control_ras_rsp.trace_buff_sz[0];
2761                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2762                     crq->control_ras_rsp.trace_buff_sz[1];
2763                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2764                     crq->control_ras_rsp.trace_buff_sz[2];
2765                 break;
2766         default:
2767                 dev_err(dev, "invalid op %d on control_ras_rsp",
2768                         crq->control_ras_rsp.op);
2769         }
2770 }
2771
2772 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2773                           loff_t *ppos)
2774 {
2775         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2776         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2777         struct device *dev = &adapter->vdev->dev;
2778         struct ibmvnic_fw_trace_entry *trace;
2779         int num = ras_comp_int->num;
2780         union ibmvnic_crq crq;
2781         dma_addr_t trace_tok;
2782
2783         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2784                 return 0;
2785
2786         trace =
2787             dma_alloc_coherent(dev,
2788                                be32_to_cpu(adapter->ras_comps[num].
2789                                            trace_buff_size), &trace_tok,
2790                                GFP_KERNEL);
2791         if (!trace) {
2792                 dev_err(dev, "Couldn't alloc trace buffer\n");
2793                 return 0;
2794         }
2795
2796         memset(&crq, 0, sizeof(crq));
2797         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2798         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2799         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2800         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2801         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2802         ibmvnic_send_crq(adapter, &crq);
2803
2804         init_completion(&adapter->fw_done);
2805         wait_for_completion(&adapter->fw_done);
2806
2807         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2808                 len =
2809                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2810                     *ppos;
2811
2812         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2813
2814         dma_free_coherent(dev,
2815                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2816                           trace, trace_tok);
2817         *ppos += len;
2818         return len;
2819 }
2820
2821 static const struct file_operations trace_ops = {
2822         .owner          = THIS_MODULE,
2823         .open           = simple_open,
2824         .read           = trace_read,
2825 };
2826
2827 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2828                            loff_t *ppos)
2829 {
2830         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2831         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2832         int num = ras_comp_int->num;
2833         char buff[5]; /*  1 or 0 plus \n and \0 */
2834         int size;
2835
2836         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2837
2838         if (*ppos >= size)
2839                 return 0;
2840
2841         copy_to_user(user_buf, buff, size);
2842         *ppos += size;
2843         return size;
2844 }
2845
2846 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2847                             size_t len, loff_t *ppos)
2848 {
2849         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2850         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2851         int num = ras_comp_int->num;
2852         union ibmvnic_crq crq;
2853         unsigned long val;
2854         char buff[9]; /* decimal max int plus \n and \0 */
2855
2856         copy_from_user(buff, user_buf, sizeof(buff));
2857         val = kstrtoul(buff, 10, NULL);
2858
2859         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2860
2861         memset(&crq, 0, sizeof(crq));
2862         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2863         crq.control_ras.cmd = CONTROL_RAS;
2864         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2865         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2866         ibmvnic_send_crq(adapter, &crq);
2867
2868         return len;
2869 }
2870
2871 static const struct file_operations paused_ops = {
2872         .owner          = THIS_MODULE,
2873         .open           = simple_open,
2874         .read           = paused_read,
2875         .write          = paused_write,
2876 };
2877
2878 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2879                             size_t len, loff_t *ppos)
2880 {
2881         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2882         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2883         int num = ras_comp_int->num;
2884         char buff[5]; /*  1 or 0 plus \n and \0 */
2885         int size;
2886
2887         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2888
2889         if (*ppos >= size)
2890                 return 0;
2891
2892         copy_to_user(user_buf, buff, size);
2893         *ppos += size;
2894         return size;
2895 }
2896
2897 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2898                              size_t len, loff_t *ppos)
2899 {
2900         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2901         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2902         int num = ras_comp_int->num;
2903         union ibmvnic_crq crq;
2904         unsigned long val;
2905         char buff[9]; /* decimal max int plus \n and \0 */
2906
2907         copy_from_user(buff, user_buf, sizeof(buff));
2908         val = kstrtoul(buff, 10, NULL);
2909
2910         memset(&crq, 0, sizeof(crq));
2911         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2912         crq.control_ras.cmd = CONTROL_RAS;
2913         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2914         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2915
2916         return len;
2917 }
2918
2919 static const struct file_operations tracing_ops = {
2920         .owner          = THIS_MODULE,
2921         .open           = simple_open,
2922         .read           = tracing_read,
2923         .write          = tracing_write,
2924 };
2925
2926 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2927                                 size_t len, loff_t *ppos)
2928 {
2929         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2930         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2931         int num = ras_comp_int->num;
2932         char buff[5]; /* decimal max char plus \n and \0 */
2933         int size;
2934
2935         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2936
2937         if (*ppos >= size)
2938                 return 0;
2939
2940         copy_to_user(user_buf, buff, size);
2941         *ppos += size;
2942         return size;
2943 }
2944
2945 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2946                                  size_t len, loff_t *ppos)
2947 {
2948         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2949         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2950         int num = ras_comp_int->num;
2951         union ibmvnic_crq crq;
2952         unsigned long val;
2953         char buff[9]; /* decimal max int plus \n and \0 */
2954
2955         copy_from_user(buff, user_buf, sizeof(buff));
2956         val = kstrtoul(buff, 10, NULL);
2957
2958         if (val > 9)
2959                 val = 9;
2960
2961         memset(&crq, 0, sizeof(crq));
2962         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2963         crq.control_ras.cmd = CONTROL_RAS;
2964         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2965         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2966         crq.control_ras.level = val;
2967         ibmvnic_send_crq(adapter, &crq);
2968
2969         return len;
2970 }
2971
2972 static const struct file_operations error_level_ops = {
2973         .owner          = THIS_MODULE,
2974         .open           = simple_open,
2975         .read           = error_level_read,
2976         .write          = error_level_write,
2977 };
2978
2979 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2980                                 size_t len, loff_t *ppos)
2981 {
2982         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2983         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2984         int num = ras_comp_int->num;
2985         char buff[5]; /* decimal max char plus \n and \0 */
2986         int size;
2987
2988         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2989         if (*ppos >= size)
2990                 return 0;
2991
2992         copy_to_user(user_buf, buff, size);
2993         *ppos += size;
2994         return size;
2995 }
2996
2997 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
2998                                  size_t len, loff_t *ppos)
2999 {
3000         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3001         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3002         union ibmvnic_crq crq;
3003         unsigned long val;
3004         char buff[9]; /* decimal max int plus \n and \0 */
3005
3006         copy_from_user(buff, user_buf, sizeof(buff));
3007         val = kstrtoul(buff, 10, NULL);
3008         if (val > 9)
3009                 val = 9;
3010
3011         memset(&crq, 0, sizeof(crq));
3012         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3013         crq.control_ras.cmd = CONTROL_RAS;
3014         crq.control_ras.correlator =
3015             adapter->ras_comps[ras_comp_int->num].correlator;
3016         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3017         crq.control_ras.level = val;
3018         ibmvnic_send_crq(adapter, &crq);
3019
3020         return len;
3021 }
3022
3023 static const struct file_operations trace_level_ops = {
3024         .owner          = THIS_MODULE,
3025         .open           = simple_open,
3026         .read           = trace_level_read,
3027         .write          = trace_level_write,
3028 };
3029
3030 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3031                                     size_t len, loff_t *ppos)
3032 {
3033         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3034         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3035         int num = ras_comp_int->num;
3036         char buff[9]; /* decimal max int plus \n and \0 */
3037         int size;
3038
3039         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3040         if (*ppos >= size)
3041                 return 0;
3042
3043         copy_to_user(user_buf, buff, size);
3044         *ppos += size;
3045         return size;
3046 }
3047
3048 static ssize_t trace_buff_size_write(struct file *file,
3049                                      const char __user *user_buf, size_t len,
3050                                      loff_t *ppos)
3051 {
3052         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3053         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3054         union ibmvnic_crq crq;
3055         unsigned long val;
3056         char buff[9]; /* decimal max int plus \n and \0 */
3057
3058         copy_from_user(buff, user_buf, sizeof(buff));
3059         val = kstrtoul(buff, 10, NULL);
3060
3061         memset(&crq, 0, sizeof(crq));
3062         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3063         crq.control_ras.cmd = CONTROL_RAS;
3064         crq.control_ras.correlator =
3065             adapter->ras_comps[ras_comp_int->num].correlator;
3066         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3067         /* trace_buff_sz is 3 bytes, stuff an int into it */
3068         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3069         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3070         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3071         ibmvnic_send_crq(adapter, &crq);
3072
3073         return len;
3074 }
3075
3076 static const struct file_operations trace_size_ops = {
3077         .owner          = THIS_MODULE,
3078         .open           = simple_open,
3079         .read           = trace_buff_size_read,
3080         .write          = trace_buff_size_write,
3081 };
3082
3083 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3084                                          struct ibmvnic_adapter *adapter)
3085 {
3086         struct device *dev = &adapter->vdev->dev;
3087         struct dentry *dir_ent;
3088         struct dentry *ent;
3089         int i;
3090
3091         debugfs_remove_recursive(adapter->ras_comps_ent);
3092
3093         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3094                                                     adapter->debugfs_dir);
3095         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3096                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3097                 return;
3098         }
3099
3100         for (i = 0; i < adapter->ras_comp_num; i++) {
3101                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3102                                              adapter->ras_comps_ent);
3103                 if (!dir_ent || IS_ERR(dir_ent)) {
3104                         dev_info(dev, "debugfs create %s dir failed\n",
3105                                  adapter->ras_comps[i].name);
3106                         continue;
3107                 }
3108
3109                 adapter->ras_comp_int[i].adapter = adapter;
3110                 adapter->ras_comp_int[i].num = i;
3111                 adapter->ras_comp_int[i].desc_blob.data =
3112                     &adapter->ras_comps[i].description;
3113                 adapter->ras_comp_int[i].desc_blob.size =
3114                     sizeof(adapter->ras_comps[i].description);
3115
3116                 /* Don't need to remember the dentry's because the debugfs dir
3117                  * gets removed recursively
3118                  */
3119                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3120                                           &adapter->ras_comp_int[i].desc_blob);
3121                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3122                                           dir_ent, &adapter->ras_comp_int[i],
3123                                           &trace_size_ops);
3124                 ent = debugfs_create_file("trace_level",
3125                                           S_IRUGO |
3126                                           (adapter->ras_comps[i].trace_level !=
3127                                            0xFF  ? S_IWUSR : 0),
3128                                            dir_ent, &adapter->ras_comp_int[i],
3129                                            &trace_level_ops);
3130                 ent = debugfs_create_file("error_level",
3131                                           S_IRUGO |
3132                                           (adapter->
3133                                            ras_comps[i].error_check_level !=
3134                                            0xFF ? S_IWUSR : 0),
3135                                           dir_ent, &adapter->ras_comp_int[i],
3136                                           &trace_level_ops);
3137                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3138                                           dir_ent, &adapter->ras_comp_int[i],
3139                                           &tracing_ops);
3140                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3141                                           dir_ent, &adapter->ras_comp_int[i],
3142                                           &paused_ops);
3143                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3144                                           &adapter->ras_comp_int[i],
3145                                           &trace_ops);
3146         }
3147 }
3148
3149 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3150                                             struct ibmvnic_adapter *adapter)
3151 {
3152         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3153         struct device *dev = &adapter->vdev->dev;
3154         union ibmvnic_crq newcrq;
3155
3156         adapter->ras_comps = dma_alloc_coherent(dev, len,
3157                                                 &adapter->ras_comps_tok,
3158                                                 GFP_KERNEL);
3159         if (!adapter->ras_comps) {
3160                 if (!firmware_has_feature(FW_FEATURE_CMO))
3161                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3162                 return;
3163         }
3164
3165         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3166                                         sizeof(struct ibmvnic_fw_comp_internal),
3167                                         GFP_KERNEL);
3168         if (!adapter->ras_comp_int)
3169                 dma_free_coherent(dev, len, adapter->ras_comps,
3170                                   adapter->ras_comps_tok);
3171
3172         memset(&newcrq, 0, sizeof(newcrq));
3173         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3174         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3175         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3176         newcrq.request_ras_comps.len = cpu_to_be32(len);
3177         ibmvnic_send_crq(adapter, &newcrq);
3178 }
3179
3180 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3181 {
3182         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3183         struct device *dev = &adapter->vdev->dev;
3184         struct ibmvnic_error_buff *error_buff, *tmp2;
3185         unsigned long flags;
3186         unsigned long flags2;
3187
3188         spin_lock_irqsave(&adapter->inflight_lock, flags);
3189         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3190                 switch (inflight_cmd->crq.generic.cmd) {
3191                 case LOGIN:
3192                         dma_unmap_single(dev, adapter->login_buf_token,
3193                                          adapter->login_buf_sz,
3194                                          DMA_BIDIRECTIONAL);
3195                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3196                                          adapter->login_rsp_buf_sz,
3197                                          DMA_BIDIRECTIONAL);
3198                         kfree(adapter->login_rsp_buf);
3199                         kfree(adapter->login_buf);
3200                         break;
3201                 case REQUEST_DUMP:
3202                         complete(&adapter->fw_done);
3203                         break;
3204                 case REQUEST_ERROR_INFO:
3205                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3206                         list_for_each_entry_safe(error_buff, tmp2,
3207                                                  &adapter->errors, list) {
3208                                 dma_unmap_single(dev, error_buff->dma,
3209                                                  error_buff->len,
3210                                                  DMA_FROM_DEVICE);
3211                                 kfree(error_buff->buff);
3212                                 list_del(&error_buff->list);
3213                                 kfree(error_buff);
3214                         }
3215                         spin_unlock_irqrestore(&adapter->error_list_lock,
3216                                                flags2);
3217                         break;
3218                 }
3219                 list_del(&inflight_cmd->list);
3220                 kfree(inflight_cmd);
3221         }
3222         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3223 }
3224
3225 static void ibmvnic_xport_event(struct work_struct *work)
3226 {
3227         struct ibmvnic_adapter *adapter = container_of(work,
3228                                                        struct ibmvnic_adapter,
3229                                                        ibmvnic_xport);
3230         struct device *dev = &adapter->vdev->dev;
3231         long rc;
3232
3233         ibmvnic_free_inflight(adapter);
3234         release_sub_crqs(adapter);
3235         if (adapter->migrated) {
3236                 rc = ibmvnic_reenable_crq_queue(adapter);
3237                 if (rc)
3238                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3239                 adapter->migrated = false;
3240                 rc = ibmvnic_send_crq_init(adapter);
3241                 if (rc)
3242                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3243         }
3244 }
3245
3246 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3247                                struct ibmvnic_adapter *adapter)
3248 {
3249         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3250         struct net_device *netdev = adapter->netdev;
3251         struct device *dev = &adapter->vdev->dev;
3252         long rc;
3253
3254         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3255                    ((unsigned long int *)crq)[0],
3256                    ((unsigned long int *)crq)[1]);
3257         switch (gen_crq->first) {
3258         case IBMVNIC_CRQ_INIT_RSP:
3259                 switch (gen_crq->cmd) {
3260                 case IBMVNIC_CRQ_INIT:
3261                         dev_info(dev, "Partner initialized\n");
3262                         /* Send back a response */
3263                         rc = ibmvnic_send_crq_init_complete(adapter);
3264                         if (!rc)
3265                                 schedule_work(&adapter->vnic_crq_init);
3266                         else
3267                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3268                         break;
3269                 case IBMVNIC_CRQ_INIT_COMPLETE:
3270                         dev_info(dev, "Partner initialization complete\n");
3271                         send_version_xchg(adapter);
3272                         break;
3273                 default:
3274                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3275                 }
3276                 return;
3277         case IBMVNIC_CRQ_XPORT_EVENT:
3278                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3279                         dev_info(dev, "Re-enabling adapter\n");
3280                         adapter->migrated = true;
3281                         schedule_work(&adapter->ibmvnic_xport);
3282                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3283                         dev_info(dev, "Backing device failover detected\n");
3284                         netif_carrier_off(netdev);
3285                         adapter->failover = true;
3286                 } else {
3287                         /* The adapter lost the connection */
3288                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3289                                 gen_crq->cmd);
3290                         schedule_work(&adapter->ibmvnic_xport);
3291                 }
3292                 return;
3293         case IBMVNIC_CRQ_CMD_RSP:
3294                 break;
3295         default:
3296                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3297                         gen_crq->first);
3298                 return;
3299         }
3300
3301         switch (gen_crq->cmd) {
3302         case VERSION_EXCHANGE_RSP:
3303                 rc = crq->version_exchange_rsp.rc.code;
3304                 if (rc) {
3305                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3306                         break;
3307                 }
3308                 dev_info(dev, "Partner protocol version is %d\n",
3309                          crq->version_exchange_rsp.version);
3310                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3311                     ibmvnic_version)
3312                         ibmvnic_version =
3313                             be16_to_cpu(crq->version_exchange_rsp.version);
3314                 send_cap_queries(adapter);
3315                 break;
3316         case QUERY_CAPABILITY_RSP:
3317                 handle_query_cap_rsp(crq, adapter);
3318                 break;
3319         case QUERY_MAP_RSP:
3320                 handle_query_map_rsp(crq, adapter);
3321                 break;
3322         case REQUEST_MAP_RSP:
3323                 handle_request_map_rsp(crq, adapter);
3324                 break;
3325         case REQUEST_UNMAP_RSP:
3326                 handle_request_unmap_rsp(crq, adapter);
3327                 break;
3328         case REQUEST_CAPABILITY_RSP:
3329                 handle_request_cap_rsp(crq, adapter);
3330                 break;
3331         case LOGIN_RSP:
3332                 netdev_dbg(netdev, "Got Login Response\n");
3333                 handle_login_rsp(crq, adapter);
3334                 break;
3335         case LOGICAL_LINK_STATE_RSP:
3336                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3337                 adapter->logical_link_state =
3338                     crq->logical_link_state_rsp.link_state;
3339                 break;
3340         case LINK_STATE_INDICATION:
3341                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3342                 adapter->phys_link_state =
3343                     crq->link_state_indication.phys_link_state;
3344                 adapter->logical_link_state =
3345                     crq->link_state_indication.logical_link_state;
3346                 break;
3347         case CHANGE_MAC_ADDR_RSP:
3348                 netdev_dbg(netdev, "Got MAC address change Response\n");
3349                 handle_change_mac_rsp(crq, adapter);
3350                 break;
3351         case ERROR_INDICATION:
3352                 netdev_dbg(netdev, "Got Error Indication\n");
3353                 handle_error_indication(crq, adapter);
3354                 break;
3355         case REQUEST_ERROR_RSP:
3356                 netdev_dbg(netdev, "Got Error Detail Response\n");
3357                 handle_error_info_rsp(crq, adapter);
3358                 break;
3359         case REQUEST_STATISTICS_RSP:
3360                 netdev_dbg(netdev, "Got Statistics Response\n");
3361                 complete(&adapter->stats_done);
3362                 break;
3363         case REQUEST_DUMP_SIZE_RSP:
3364                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3365                 handle_dump_size_rsp(crq, adapter);
3366                 break;
3367         case REQUEST_DUMP_RSP:
3368                 netdev_dbg(netdev, "Got Request Dump Response\n");
3369                 complete(&adapter->fw_done);
3370                 break;
3371         case QUERY_IP_OFFLOAD_RSP:
3372                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3373                 handle_query_ip_offload_rsp(adapter);
3374                 break;
3375         case MULTICAST_CTRL_RSP:
3376                 netdev_dbg(netdev, "Got multicast control Response\n");
3377                 break;
3378         case CONTROL_IP_OFFLOAD_RSP:
3379                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3380                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3381                                  sizeof(adapter->ip_offload_ctrl),
3382                                  DMA_TO_DEVICE);
3383                 /* We're done with the queries, perform the login */
3384                 send_login(adapter);
3385                 break;
3386         case REQUEST_RAS_COMP_NUM_RSP:
3387                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3388                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3389                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3390                         break;
3391                 }
3392                 adapter->ras_comp_num =
3393                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3394                 handle_request_ras_comp_num_rsp(crq, adapter);
3395                 break;
3396         case REQUEST_RAS_COMPS_RSP:
3397                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3398                 handle_request_ras_comps_rsp(crq, adapter);
3399                 break;
3400         case CONTROL_RAS_RSP:
3401                 netdev_dbg(netdev, "Got Control RAS Response\n");
3402                 handle_control_ras_rsp(crq, adapter);
3403                 break;
3404         case COLLECT_FW_TRACE_RSP:
3405                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3406                 complete(&adapter->fw_done);
3407                 break;
3408         default:
3409                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3410                            gen_crq->cmd);
3411         }
3412 }
3413
3414 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3415 {
3416         struct ibmvnic_adapter *adapter = instance;
3417         struct ibmvnic_crq_queue *queue = &adapter->crq;
3418         struct vio_dev *vdev = adapter->vdev;
3419         union ibmvnic_crq *crq;
3420         unsigned long flags;
3421         bool done = false;
3422
3423         spin_lock_irqsave(&queue->lock, flags);
3424         vio_disable_interrupts(vdev);
3425         while (!done) {
3426                 /* Pull all the valid messages off the CRQ */
3427                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3428                         ibmvnic_handle_crq(crq, adapter);
3429                         crq->generic.first = 0;
3430                 }
3431                 vio_enable_interrupts(vdev);
3432                 crq = ibmvnic_next_crq(adapter);
3433                 if (crq) {
3434                         vio_disable_interrupts(vdev);
3435                         ibmvnic_handle_crq(crq, adapter);
3436                         crq->generic.first = 0;
3437                 } else {
3438                         done = true;
3439                 }
3440         }
3441         spin_unlock_irqrestore(&queue->lock, flags);
3442         return IRQ_HANDLED;
3443 }
3444
3445 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3446 {
3447         struct vio_dev *vdev = adapter->vdev;
3448         int rc;
3449
3450         do {
3451                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3452         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3453
3454         if (rc)
3455                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3456
3457         return rc;
3458 }
3459
3460 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3461 {
3462         struct ibmvnic_crq_queue *crq = &adapter->crq;
3463         struct device *dev = &adapter->vdev->dev;
3464         struct vio_dev *vdev = adapter->vdev;
3465         int rc;
3466
3467         /* Close the CRQ */
3468         do {
3469                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3470         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3471
3472         /* Clean out the queue */
3473         memset(crq->msgs, 0, PAGE_SIZE);
3474         crq->cur = 0;
3475
3476         /* And re-open it again */
3477         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3478                                 crq->msg_token, PAGE_SIZE);
3479
3480         if (rc == H_CLOSED)
3481                 /* Adapter is good, but other end is not ready */
3482                 dev_warn(dev, "Partner adapter not ready\n");
3483         else if (rc != 0)
3484                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3485
3486         return rc;
3487 }
3488
3489 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3490 {
3491         struct ibmvnic_crq_queue *crq = &adapter->crq;
3492         struct vio_dev *vdev = adapter->vdev;
3493         long rc;
3494
3495         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3496         free_irq(vdev->irq, adapter);
3497         do {
3498                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3499         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3500
3501         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3502                          DMA_BIDIRECTIONAL);
3503         free_page((unsigned long)crq->msgs);
3504 }
3505
3506 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3507 {
3508         struct ibmvnic_crq_queue *crq = &adapter->crq;
3509         struct device *dev = &adapter->vdev->dev;
3510         struct vio_dev *vdev = adapter->vdev;
3511         int rc, retrc = -ENOMEM;
3512
3513         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3514         /* Should we allocate more than one page? */
3515
3516         if (!crq->msgs)
3517                 return -ENOMEM;
3518
3519         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3520         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3521                                         DMA_BIDIRECTIONAL);
3522         if (dma_mapping_error(dev, crq->msg_token))
3523                 goto map_failed;
3524
3525         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3526                                 crq->msg_token, PAGE_SIZE);
3527
3528         if (rc == H_RESOURCE)
3529                 /* maybe kexecing and resource is busy. try a reset */
3530                 rc = ibmvnic_reset_crq(adapter);
3531         retrc = rc;
3532
3533         if (rc == H_CLOSED) {
3534                 dev_warn(dev, "Partner adapter not ready\n");
3535         } else if (rc) {
3536                 dev_warn(dev, "Error %d opening adapter\n", rc);
3537                 goto reg_crq_failed;
3538         }
3539
3540         retrc = 0;
3541
3542         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3543         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3544                          adapter);
3545         if (rc) {
3546                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3547                         vdev->irq, rc);
3548                 goto req_irq_failed;
3549         }
3550
3551         rc = vio_enable_interrupts(vdev);
3552         if (rc) {
3553                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3554                 goto req_irq_failed;
3555         }
3556
3557         crq->cur = 0;
3558         spin_lock_init(&crq->lock);
3559
3560         return retrc;
3561
3562 req_irq_failed:
3563         do {
3564                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3565         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3566 reg_crq_failed:
3567         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3568 map_failed:
3569         free_page((unsigned long)crq->msgs);
3570         return retrc;
3571 }
3572
3573 /* debugfs for dump */
3574 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3575 {
3576         struct net_device *netdev = seq->private;
3577         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3578         struct device *dev = &adapter->vdev->dev;
3579         union ibmvnic_crq crq;
3580
3581         memset(&crq, 0, sizeof(crq));
3582         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3583         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3584         ibmvnic_send_crq(adapter, &crq);
3585
3586         init_completion(&adapter->fw_done);
3587         wait_for_completion(&adapter->fw_done);
3588
3589         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3590
3591         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3592                          DMA_BIDIRECTIONAL);
3593
3594         kfree(adapter->dump_data);
3595
3596         return 0;
3597 }
3598
3599 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3600 {
3601         return single_open(file, ibmvnic_dump_show, inode->i_private);
3602 }
3603
3604 static const struct file_operations ibmvnic_dump_ops = {
3605         .owner          = THIS_MODULE,
3606         .open           = ibmvnic_dump_open,
3607         .read           = seq_read,
3608         .llseek         = seq_lseek,
3609         .release        = single_release,
3610 };
3611
3612 static void handle_crq_init_rsp(struct work_struct *work)
3613 {
3614         struct ibmvnic_adapter *adapter = container_of(work,
3615                                                        struct ibmvnic_adapter,
3616                                                        vnic_crq_init);
3617         struct device *dev = &adapter->vdev->dev;
3618         struct net_device *netdev = adapter->netdev;
3619         unsigned long timeout = msecs_to_jiffies(30000);
3620         bool restart = false;
3621         int rc;
3622
3623         if (adapter->failover) {
3624                 release_sub_crqs(adapter);
3625                 if (netif_running(netdev)) {
3626                         netif_tx_disable(netdev);
3627                         ibmvnic_close(netdev);
3628                         restart = true;
3629                 }
3630         }
3631
3632         send_version_xchg(adapter);
3633         reinit_completion(&adapter->init_done);
3634         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3635                 dev_err(dev, "Passive init timeout\n");
3636                 goto task_failed;
3637         }
3638
3639         do {
3640                 if (adapter->renegotiate) {
3641                         adapter->renegotiate = false;
3642                         release_sub_crqs_no_irqs(adapter);
3643                         send_cap_queries(adapter);
3644
3645                         reinit_completion(&adapter->init_done);
3646                         if (!wait_for_completion_timeout(&adapter->init_done,
3647                                                          timeout)) {
3648                                 dev_err(dev, "Passive init timeout\n");
3649                                 goto task_failed;
3650                         }
3651                 }
3652         } while (adapter->renegotiate);
3653         rc = init_sub_crq_irqs(adapter);
3654
3655         if (rc)
3656                 goto task_failed;
3657
3658         netdev->real_num_tx_queues = adapter->req_tx_queues;
3659         netdev->mtu = adapter->req_mtu;
3660         netdev->min_mtu = adapter->min_mtu;
3661         netdev->max_mtu = adapter->max_mtu;
3662
3663         if (adapter->failover) {
3664                 adapter->failover = false;
3665                 if (restart) {
3666                         rc = ibmvnic_open(netdev);
3667                         if (rc)
3668                                 goto restart_failed;
3669                 }
3670                 netif_carrier_on(netdev);
3671                 return;
3672         }
3673
3674         rc = register_netdev(netdev);
3675         if (rc) {
3676                 dev_err(dev,
3677                         "failed to register netdev rc=%d\n", rc);
3678                 goto register_failed;
3679         }
3680         dev_info(dev, "ibmvnic registered\n");
3681
3682         return;
3683
3684 restart_failed:
3685         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3686 register_failed:
3687         release_sub_crqs(adapter);
3688 task_failed:
3689         dev_err(dev, "Passive initialization was not successful\n");
3690 }
3691
3692 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3693 {
3694         unsigned long timeout = msecs_to_jiffies(30000);
3695         struct ibmvnic_adapter *adapter;
3696         struct net_device *netdev;
3697         unsigned char *mac_addr_p;
3698         struct dentry *ent;
3699         char buf[17]; /* debugfs name buf */
3700         int rc;
3701
3702         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3703                 dev->unit_address);
3704
3705         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3706                                                         VETH_MAC_ADDR, NULL);
3707         if (!mac_addr_p) {
3708                 dev_err(&dev->dev,
3709                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3710                         __FILE__, __LINE__);
3711                 return 0;
3712         }
3713
3714         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3715                                    IBMVNIC_MAX_TX_QUEUES);
3716         if (!netdev)
3717                 return -ENOMEM;
3718
3719         adapter = netdev_priv(netdev);
3720         dev_set_drvdata(&dev->dev, netdev);
3721         adapter->vdev = dev;
3722         adapter->netdev = netdev;
3723         adapter->failover = false;
3724
3725         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3726         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3727         netdev->irq = dev->irq;
3728         netdev->netdev_ops = &ibmvnic_netdev_ops;
3729         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3730         SET_NETDEV_DEV(netdev, &dev->dev);
3731
3732         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3733         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3734
3735         spin_lock_init(&adapter->stats_lock);
3736
3737         rc = ibmvnic_init_crq_queue(adapter);
3738         if (rc) {
3739                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3740                 goto free_netdev;
3741         }
3742
3743         INIT_LIST_HEAD(&adapter->errors);
3744         INIT_LIST_HEAD(&adapter->inflight);
3745         spin_lock_init(&adapter->error_list_lock);
3746         spin_lock_init(&adapter->inflight_lock);
3747
3748         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3749                                               sizeof(struct ibmvnic_statistics),
3750                                               DMA_FROM_DEVICE);
3751         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3752                 if (!firmware_has_feature(FW_FEATURE_CMO))
3753                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3754                 rc = -ENOMEM;
3755                 goto free_crq;
3756         }
3757
3758         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3759         ent = debugfs_create_dir(buf, NULL);
3760         if (!ent || IS_ERR(ent)) {
3761                 dev_info(&dev->dev, "debugfs create directory failed\n");
3762                 adapter->debugfs_dir = NULL;
3763         } else {
3764                 adapter->debugfs_dir = ent;
3765                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3766                                           netdev, &ibmvnic_dump_ops);
3767                 if (!ent || IS_ERR(ent)) {
3768                         dev_info(&dev->dev,
3769                                  "debugfs create dump file failed\n");
3770                         adapter->debugfs_dump = NULL;
3771                 } else {
3772                         adapter->debugfs_dump = ent;
3773                 }
3774         }
3775         ibmvnic_send_crq_init(adapter);
3776
3777         init_completion(&adapter->init_done);
3778         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3779                 return 0;
3780
3781         do {
3782                 if (adapter->renegotiate) {
3783                         adapter->renegotiate = false;
3784                         release_sub_crqs_no_irqs(adapter);
3785                         send_cap_queries(adapter);
3786
3787                         reinit_completion(&adapter->init_done);
3788                         if (!wait_for_completion_timeout(&adapter->init_done,
3789                                                          timeout))
3790                                 return 0;
3791                 }
3792         } while (adapter->renegotiate);
3793
3794         rc = init_sub_crq_irqs(adapter);
3795         if (rc) {
3796                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3797                 goto free_debugfs;
3798         }
3799
3800         netdev->real_num_tx_queues = adapter->req_tx_queues;
3801         netdev->mtu = adapter->req_mtu;
3802
3803         rc = register_netdev(netdev);
3804         if (rc) {
3805                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3806                 goto free_sub_crqs;
3807         }
3808         dev_info(&dev->dev, "ibmvnic registered\n");
3809
3810         return 0;
3811
3812 free_sub_crqs:
3813         release_sub_crqs(adapter);
3814 free_debugfs:
3815         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3816                 debugfs_remove_recursive(adapter->debugfs_dir);
3817 free_crq:
3818         ibmvnic_release_crq_queue(adapter);
3819 free_netdev:
3820         free_netdev(netdev);
3821         return rc;
3822 }
3823
3824 static int ibmvnic_remove(struct vio_dev *dev)
3825 {
3826         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3827         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3828
3829         unregister_netdev(netdev);
3830
3831         release_sub_crqs(adapter);
3832
3833         ibmvnic_release_crq_queue(adapter);
3834
3835         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3836                 debugfs_remove_recursive(adapter->debugfs_dir);
3837
3838         dma_unmap_single(&dev->dev, adapter->stats_token,
3839                          sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3840
3841         if (adapter->ras_comps)
3842                 dma_free_coherent(&dev->dev,
3843                                   adapter->ras_comp_num *
3844                                   sizeof(struct ibmvnic_fw_component),
3845                                   adapter->ras_comps, adapter->ras_comps_tok);
3846
3847         kfree(adapter->ras_comp_int);
3848
3849         free_netdev(netdev);
3850         dev_set_drvdata(&dev->dev, NULL);
3851
3852         return 0;
3853 }
3854
3855 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3856 {
3857         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3858         struct ibmvnic_adapter *adapter;
3859         struct iommu_table *tbl;
3860         unsigned long ret = 0;
3861         int i;
3862
3863         tbl = get_iommu_table_base(&vdev->dev);
3864
3865         /* netdev inits at probe time along with the structures we need below*/
3866         if (!netdev)
3867                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3868
3869         adapter = netdev_priv(netdev);
3870
3871         ret += PAGE_SIZE; /* the crq message queue */
3872         ret += adapter->bounce_buffer_size;
3873         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3874
3875         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3876                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3877
3878         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3879              i++)
3880                 ret += adapter->rx_pool[i].size *
3881                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3882
3883         return ret;
3884 }
3885
3886 static int ibmvnic_resume(struct device *dev)
3887 {
3888         struct net_device *netdev = dev_get_drvdata(dev);
3889         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3890         int i;
3891
3892         /* kick the interrupt handlers just in case we lost an interrupt */
3893         for (i = 0; i < adapter->req_rx_queues; i++)
3894                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3895                                      adapter->rx_scrq[i]);
3896
3897         return 0;
3898 }
3899
3900 static struct vio_device_id ibmvnic_device_table[] = {
3901         {"network", "IBM,vnic"},
3902         {"", "" }
3903 };
3904 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3905
3906 static const struct dev_pm_ops ibmvnic_pm_ops = {
3907         .resume = ibmvnic_resume
3908 };
3909
3910 static struct vio_driver ibmvnic_driver = {
3911         .id_table       = ibmvnic_device_table,
3912         .probe          = ibmvnic_probe,
3913         .remove         = ibmvnic_remove,
3914         .get_desired_dma = ibmvnic_get_desired_dma,
3915         .name           = ibmvnic_driver_name,
3916         .pm             = &ibmvnic_pm_ops,
3917 };
3918
3919 /* module functions */
3920 static int __init ibmvnic_module_init(void)
3921 {
3922         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3923                 IBMVNIC_DRIVER_VERSION);
3924
3925         return vio_register_driver(&ibmvnic_driver);
3926 }
3927
3928 static void __exit ibmvnic_module_exit(void)
3929 {
3930         vio_unregister_driver(&ibmvnic_driver);
3931 }
3932
3933 module_init(ibmvnic_module_init);
3934 module_exit(ibmvnic_module_exit);